### Bug Summary

File: | builds/wireshark/wireshark/epan/dissectors/packet-http.c
Warning: | line 2710, column 24 Dereference of null pointer (loaded from variable 'p')

### Annotated Source Code

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clang -cc1 -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name packet-http.c -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 2 -fhalf-no-semantic-interposition -fno-delete-null-pointer-checks -mframe-pointer=all -relaxed-aliasing -fmath-errno -ffp-contract=on -fno-rounding-math -ffloat16-excess-precision=fast -fbfloat16-excess-precision=fast -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -fdebug-compilation-dir=/builds/wireshark/wireshark/build -fcoverage-compilation-dir=/builds/wireshark/wireshark/build -resource-dir /usr/lib/llvm-22/lib/clang/22 -isystem /usr/include/glib-2.0 -isystem /usr/lib/x86_64-linux-gnu/glib-2.0/include -isystem /builds/wireshark/wireshark/epan/dissectors -isystem /builds/wireshark/wireshark/build/epan/dissectors -isystem /usr/include/mit-krb5 -isystem /usr/include/libxml2 -isystem /builds/wireshark/wireshark/epan -D CARES_NO_DEPRECATED -D G_DISABLE_DEPRECATED -D G_DISABLE_SINGLE_INCLUDES -D WS_BUILD_DLL -D WS_DEBUG -D WS_DEBUG_UTF_8 -I /builds/wireshark/wireshark/build -I /builds/wireshark/wireshark -I /builds/wireshark/wireshark/include -D _GLIBCXX_ASSERTIONS -internal-isystem /usr/lib/llvm-22/lib/clang/22/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/16/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -fmacro-prefix-map=/builds/wireshark/wireshark/= -fmacro-prefix-map=/builds/wireshark/wireshark/build/= -fmacro-prefix-map=../= -Wno-format-nonliteral -std=gnu17 -ferror-limit 19 -fvisibility=hidden -fwrapv -fwrapv-pointer -fstrict-flex-arrays=3 -stack-protector 2 -fstack-clash-protection -fcf-protection=full -fgnuc-version=4.2.1 -fskip-odr-check-in-gmf -fexceptions -fcolor-diagnostics -analyzer-output=html -faddrsig -fdwarf2-cfi-asm -o /builds/wireshark/wireshark/sbout/2026-07-21-100400-3661-1 -x c /builds/wireshark/wireshark/epan/dissectors/packet-http.c

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1 | /* packet-http.c
2 | * Routines for HTTP packet disassembly
3 | * RFC 1945 (HTTP/1.0)
4 | * RFC 2616 (HTTP/1.1)
5 | *
6 | * Guy Harris <guy@alum.mit.edu>
7 | *
8 | * Copyright 2017, Eugene Adell <eugene.adell@gmail.com>
9 | * Copyright 2004, Jerry Talkington <jtalkington@users.sourceforge.net>
10 | * Copyright 2002, Tim Potter <tpot@samba.org>
11 | * Copyright 1999, Andrew Tridgell <tridge@samba.org>
12 | *
13 | * Wireshark - Network traffic analyzer
14 | * By Gerald Combs <gerald@wireshark.org>
15 | * Copyright 1998 Gerald Combs
16 | *
17 | * SPDX-License-Identifier: GPL-2.0-or-later
18 | */
19 |
20 | #include "config.h"
21 |
22 | #include <errno(*__errno_location ()).h>
23 |
24 | #include <epan/packet.h>
25 | #include <epan/prefs.h>
26 | #include <epan/expert.h>
27 | #include <epan/follow.h>
28 | #include <epan/addr_resolv.h>
29 | #include <epan/uat.h>
30 | #include <epan/charsets.h>
31 | #include <epan/strutil.h>
32 | #include <epan/stats_tree.h>
33 | #include <epan/to_str.h>
34 | #include <epan/req_resp_hdrs.h>
35 | #include <epan/proto_data.h>
36 | #include <epan/export_object.h>
37 | #include <epan/exceptions.h>
38 | #include <epan/show_exception.h>
39 | #include <epan/unit_strings.h>
40 | #include <epan/credentials.h>
41 | #include <glib.h>
42 | #include "packet-http.h"
43 | #include "packet-http2.h"
44 | #include "packet-tcp.h"
45 | #include "packet-tls.h"
46 | #include "packet-acdr.h"
47 | #include "packet-media-type.h"
48 |
49 | void proto_register_http(void);
50 | void proto_reg_handoff_http(void);
51 | void proto_register_message_http(void);
52 | void proto_reg_handoff_message_http(void);
53 |
54 | static int http_tap;
55 | static int http_eo_tap;
56 | static int http_follow_tap;
57 | static int credentials_tap;
58 |
59 | static int proto_http;
60 | static int proto_http2;
61 | static int proto_ssdp;
62 | static int hf_http_notification;
63 | static int hf_http_response;
64 | static int hf_http_request;
65 | static int hf_http_response_line;
66 | static int hf_http_request_line;
67 | static int hf_http_basic;
68 | static int hf_http_citrix;
69 | static int hf_http_citrix_user;
70 | static int hf_http_citrix_domain;
71 | static int hf_http_citrix_passwd;
72 | static int hf_http_citrix_session;
73 | static int hf_http_request_method;
74 | static int hf_http_request_uri;
75 | static int hf_http_request_full_uri;
76 | static int hf_http_request_path;
77 | static int hf_http_request_path_segment;
78 | static int hf_http_request_query;
79 | static int hf_http_request_query_parameter;
80 | static int hf_http_request_version;
81 | static int hf_http_response_version;
82 | static int hf_http_response_code;
83 | static int hf_http_response_code_desc;
84 | static int hf_http_response_phrase;
85 | static int hf_http_authorization;
86 | static int hf_http_proxy_authenticate;
87 | static int hf_http_proxy_authorization;
88 | static int hf_http_proxy_connect_host;
89 | static int hf_http_proxy_connect_port;
90 | static int hf_http_www_authenticate;
91 | static int hf_http_content_type;
92 | static int hf_http_content_length_header;
93 | static int hf_http_content_length;
94 | static int hf_http_content_encoding;
95 | static int hf_http_transfer_encoding;
96 | static int hf_http_upgrade;
97 | static int hf_http_user_agent;
98 | static int hf_http_host;
99 | static int hf_http_range;
100 | static int hf_http_content_range;
101 | static int hf_http_connection;
102 | static int hf_http_cookie;
103 | static int hf_http_cookie_pair;
104 | static int hf_http_accept;
105 | static int hf_http_accept_query;
106 | static int hf_http_referer;
107 | static int hf_http_accept_language;
108 | static int hf_http_accept_encoding;
109 | static int hf_http_date;
110 | static int hf_http_cache_control;
111 | static int hf_http_server;
112 | static int hf_http_location;
113 | static int hf_http_sec_websocket_accept;
114 | static int hf_http_sec_websocket_extensions;
115 | static int hf_http_sec_websocket_key;
116 | static int hf_http_sec_websocket_protocol;
117 | static int hf_http_sec_websocket_version;
118 | static int hf_http_set_cookie;
119 | static int hf_http_last_modified;
120 | static int hf_http_x_forwarded_for;
121 | static int hf_http_http2_settings;
122 | static int hf_http_request_in;
123 | static int hf_http_response_in;
124 | /*static int hf_http_next_request_in;
125 | static int hf_http_next_response_in;
126 | static int hf_http_prev_request_in;
127 | static int hf_http_prev_response_in; */
128 | static int hf_http_time;
129 | static int hf_http_chunk_size;
130 | static int hf_http_chunk_data;
131 | static int hf_http_chunk_boundary;
132 | static int hf_http_chunked_trailer_part;
133 | static int hf_http_file_data;
134 | static int hf_http_unknown_header;
135 | static int hf_http_http2_settings_uri;
136 |
137 | static int ett_http;
138 | static int ett_http_ntlmssp;
139 | static int ett_http_kerberos;
140 | static int ett_http_request;
141 | static int ett_http_request_uri;
142 | static int ett_http_request_path;
143 | static int ett_http_request_query;
144 | static int ett_http_chunked_response;
145 | static int ett_http_chunk_data;
146 | static int ett_http_encoded_entity;
147 | static int ett_http_header_item;
148 | static int ett_http_http2_settings_item;
149 |
150 | static expert_field ei_http_te_and_length;
151 | static expert_field ei_http_te_unknown;
152 | static expert_field ei_http_subdissector_failed;
153 | static expert_field ei_http_tls_port;
154 | static expert_field ei_http_leading_crlf;
155 | static expert_field ei_http_excess_data;
156 | static expert_field ei_http_bad_header_name;
157 | static expert_field ei_http_header_name_trailing_ws;
158 | static expert_field ei_http_bad_header_value_nul;
159 | static expert_field ei_http_decompression_failed;
160 | static expert_field ei_http_decompression_disabled;
161 | static expert_field ei_http_response_code_invalid;
162 | static expert_field ei_http_request_uri_invalid;
163 | static expert_field ei_http_request_uri_whitespace;
164 |
165 | static dissector_handle_t http_handle;
166 | static dissector_handle_t http_tcp_handle;
167 | static dissector_handle_t http_tls_handle;
168 | static dissector_handle_t http_sctp_handle;
169 |
170 | static dissector_handle_t media_handle;
171 | static dissector_handle_t http2_handle;
172 | static dissector_handle_t sstp_handle;
173 | static dissector_handle_t ntlmssp_handle;
174 | static dissector_handle_t gssapi_handle;
175 |
176 | /* RFC 3986 Ch 2.2 Reserved characters*/
177 | /* patterns used for tvb_ws_mempbrk_pattern_uint8 */
178 | static ws_mempbrk_pattern pbrk_gen_delims;
179 | static ws_mempbrk_pattern pbrk_sub_delims;
180 |
181 | /* reassembly table for streaming chunk mode */
182 | static reassembly_table http_streaming_reassembly_table;
183 |
184 | REASSEMBLE_ITEMS_DEFINE(http_body, "HTTP Chunked Body")static int ett_http_body_fragment; static int ett_http_body_fragments ; static int hf_http_body_fragments; static int hf_http_body_fragment ; static int hf_http_body_fragment_overlap; static int hf_http_body_fragment_overlap_conflicts ; static int hf_http_body_fragment_multiple_tails; static int hf_http_body_fragment_too_long_fragment; static int hf_http_body_fragment_error ; static int hf_http_body_fragment_count; static int hf_http_body_reassembled_in ; static int hf_http_body_reassembled_length; static int hf_http_body_reassembled_data ; static int hf_http_body_segment; static const fragment_items http_body_fragment_items = { &ett_http_body_fragment, & ett_http_body_fragments, &hf_http_body_fragments, &hf_http_body_fragment , &hf_http_body_fragment_overlap, &hf_http_body_fragment_overlap_conflicts , &hf_http_body_fragment_multiple_tails, &hf_http_body_fragment_too_long_fragment , &hf_http_body_fragment_error, &hf_http_body_fragment_count , &hf_http_body_reassembled_in, &hf_http_body_reassembled_length , &hf_http_body_reassembled_data, "HTTP Chunked Body" " fragments" };
185 |
186 | /* HTTP chunk virtual frame number (similar to HTTP2 frame num) */
187 | #define get_http_chunk_frame_numget_virtual_frame_num64 get_virtual_frame_num64
188 |
189 | /* Stuff for generation/handling of fields for custom HTTP headers */
190 | typedef struct _header_field_t {
191 | char* header_name;
192 | char* header_desc;
193 | } header_field_t;
194 |
195 | static header_field_t* header_fields;
196 | static unsigned num_header_fields;
197 |
198 | static GHashTable* header_fields_hash;
199 | static hf_register_info* dynamic_hf;
200 | static unsigned dynamic_hf_size;
201 |
202 | static bool_Bool
203 | header_fields_update_cb(void *r, char **err)
204 | {
205 | header_field_t *rec = (header_field_t *)r;
206 | char c;
207 |
208 | if (rec->header_name == NULL((void*)0)) {
209 | *err = g_strdup("Header name can't be empty")g_strdup_inline ("Header name can't be empty");
210 | return false0;
211 | }
212 |
213 | g_strstrip(rec->header_name)g_strchomp (g_strchug (rec->header_name));
214 | if (rec->header_name[0] == 0) {
215 | *err = g_strdup("Header name can't be empty")g_strdup_inline ("Header name can't be empty");
216 | return false0;
217 | }
218 |
219 | /* Check for invalid characters (to avoid asserting out when
220 | * registering the field).
221 | */
222 | c = proto_check_field_name(rec->header_name);
223 | if (c) {
224 | *err = ws_strdup_printf("Header name can't contain '%c'", c)wmem_strdup_printf(((void*)0), "Header name can't contain '%c'" , c);
225 | return false0;
226 | }
227 |
228 | *err = NULL((void*)0);
229 | return true1;
230 | }
231 |
232 | static void *
233 | header_fields_copy_cb(void* n, const void* o, size_t siz _U___attribute__((unused)))
234 | {
235 | header_field_t* new_rec = (header_field_t*)n;
236 | const header_field_t* old_rec = (const header_field_t*)o;
237 |
238 | new_rec->header_name = g_strdup(old_rec->header_name)g_strdup_inline (old_rec->header_name);
239 | new_rec->header_desc = g_strdup(old_rec->header_desc)g_strdup_inline (old_rec->header_desc);
240 |
241 | return new_rec;
242 | }
243 |
244 | static void
245 | header_fields_free_cb(void*r)
246 | {
247 | header_field_t* rec = (header_field_t*)r;
248 |
249 | g_free(rec->header_name)(__builtin_object_size ((rec->header_name), 0) != ((size_t ) - 1)) ? g_free_sized (rec->header_name, __builtin_object_size ((rec->header_name), 0)) : (g_free) (rec->header_name);
250 | g_free(rec->header_desc)(__builtin_object_size ((rec->header_desc), 0) != ((size_t ) - 1)) ? g_free_sized (rec->header_desc, __builtin_object_size ((rec->header_desc), 0)) : (g_free) (rec->header_desc);
251 | }
252 |
253 | UAT_CSTRING_CB_DEF(header_fields, header_name, header_field_t)static void header_fields_header_name_set_cb(void* rec, const char* buf, unsigned len, const void* u1 __attribute__((unused )), const void* u2 __attribute__((unused))) { char* new_buf = g_strndup(buf,len); (__builtin_object_size (((((header_field_t *)rec)->header_name)), 0) != ((size_t) - 1)) ? g_free_sized ((((header_field_t*)rec)->header_name), __builtin_object_size (((((header_field_t*)rec)->header_name)), 0)) : (g_free) ( (((header_field_t*)rec)->header_name)); (((header_field_t* )rec)->header_name) = new_buf; } static void header_fields_header_name_tostr_cb (void* rec, char** out_ptr, unsigned* out_len, const void* u1 __attribute__((unused)), const void* u2 __attribute__((unused ))) { if (((header_field_t*)rec)->header_name ) { *out_ptr = g_strdup_inline ((((header_field_t*)rec)->header_name)) ; *out_len = (unsigned)strlen((((header_field_t*)rec)->header_name )); } else { *out_ptr = g_strdup_inline (""); *out_len = 0; } }
254 | UAT_CSTRING_CB_DEF(header_fields, header_desc, header_field_t)static void header_fields_header_desc_set_cb(void* rec, const char* buf, unsigned len, const void* u1 __attribute__((unused )), const void* u2 __attribute__((unused))) { char* new_buf = g_strndup(buf,len); (__builtin_object_size (((((header_field_t *)rec)->header_desc)), 0) != ((size_t) - 1)) ? g_free_sized ((((header_field_t*)rec)->header_desc), __builtin_object_size (((((header_field_t*)rec)->header_desc)), 0)) : (g_free) ( (((header_field_t*)rec)->header_desc)); (((header_field_t* )rec)->header_desc) = new_buf; } static void header_fields_header_desc_tostr_cb (void* rec, char** out_ptr, unsigned* out_len, const void* u1 __attribute__((unused)), const void* u2 __attribute__((unused ))) { if (((header_field_t*)rec)->header_desc ) { *out_ptr = g_strdup_inline ((((header_field_t*)rec)->header_desc)) ; *out_len = (unsigned)strlen((((header_field_t*)rec)->header_desc )); } else { *out_ptr = g_strdup_inline (""); *out_len = 0; } }
255 |
256 | /*
257 | * desegmentation of HTTP headers
258 | * (when we are over TCP or another protocol providing the desegmentation API)
259 | */
260 | static bool_Bool http_desegment_headers = true1;
261 |
262 | /*
263 | * desegmentation of HTTP bodies
264 | * (when we are over TCP or another protocol providing the desegmentation API)
265 | * TODO let the user filter on content-type the bodies he wants desegmented
266 | */
267 | static bool_Bool http_desegment_body = true1;
268 |
269 | /*
270 | * De-chunking of content-encoding: chunk entity bodies.
271 | */
272 | static bool_Bool http_dechunk_body = true1;
273 |
274 | /*
275 | * Decompression of compressed content-encoded entities.
276 | */
277 | static bool_Bool http_decompress_body = true1;
278 |
279 | /*
280 | * Extra checks for valid ASCII data in HTTP headers.
281 | */
282 | static bool_Bool http_check_ascii_headers = false0;
283 |
284 | /*
285 | * Try heuristic sub-dissectors for HTTP message bodies before
286 | * sub-dissectors registered to the Content-Type, aka "MIME sniffing".
287 | * Disabled by default, per RFC 9110.
288 | */
289 | static bool_Bool http_try_heuristic_first;
290 |
291 | /* Simple Service Discovery Protocol
292 | * SSDP is implemented atop HTTP (yes, it really *does* run over UDP).
293 | * SSDP is the discovery protocol of Universal Plug and Play
294 | * UPnP http://www.upnp.org/specs/arch/UPnP-arch-DeviceArchitecture-v1.1.pdf
295 | */
296 | #define TCP_PORT_SSDP1900 1900
297 | #define UDP_PORT_SSDP1900 1900
298 |
299 | /*
300 | * TCP and TLS ports
301 | *
302 | * 2710 is the XBT BitTorrent tracker
303 | */
304 |
305 | #define TCP_DEFAULT_RANGE"80,3128,3132,5985,8080,8088,11371,1900,2869,2710" "80,3128,3132,5985,8080,8088,11371,1900,2869,2710"
306 | #define SCTP_DEFAULT_RANGE"80" "80"
307 | #define TLS_DEFAULT_RANGE"443" "443"
308 |
309 | static range_t *global_http_tls_range;
310 |
311 | static range_t *http_tcp_range;
312 | static range_t *http_sctp_range;
313 | static range_t *http_tls_range;
314 |
315 | typedef void (*ReqRespDissector)(packet_info*, tvbuff_t*, proto_tree*, unsigned, const unsigned char*,
316 | const unsigned char*, http_conv_t *, http_req_res_t *);
317 |
318 | /**
319 | * Transfer codings from
320 | * https://www.iana.org/assignments/http-parameters/http-parameters.xhtml#transfer-coding
321 | * Note: chunked encoding is handled separately.
322 | */
323 | typedef enum _http_transfer_coding {
324 | HTTP_TE_NONE, /* Dummy value for header which is not set */
325 | /* HTTP_TE_CHUNKED, */
326 | HTTP_TE_COMPRESS,
327 | HTTP_TE_DEFLATE,
328 | HTTP_TE_GZIP,
329 | HTTP_TE_IDENTITY,
330 | HTTP_TE_UNKNOWN, /* Header was set, but no valid name was found */
331 | } http_transfer_coding;
332 |
333 | /*
334 | * Structure holding information from headers needed by main
335 | * HTTP dissector code.
336 | */
337 | typedef struct {
338 | char *content_type;
339 | char *content_type_parameters;
340 | int64_t content_length;
341 | char *content_encoding;
342 | char *upgrade;
343 | http_transfer_coding transfer_encoding;
344 | bool_Bool have_content_length;
345 | bool_Bool transfer_encoding_chunked;
346 | } headers_t;
347 |
348 | /* request or response streaming reassembly data */
349 | typedef struct {
350 | /* reassembly information only for request or response with chunked and streaming data */
351 | streaming_reassembly_info_t* streaming_reassembly_info;
352 | /* subdissector handler for request or response with chunked and streaming data */
353 | dissector_handle_t streaming_handle;
354 | /* message being passed to subdissector if the request or response has chunked and streaming data */
355 | media_content_info_t* content_info;
356 | headers_t* main_headers;
357 | } http_streaming_reassembly_data_t;
358 |
359 | /* http request or response private data */
360 | typedef struct {
361 | /* direction of request message */
362 | int req_fwd_flow;
363 | /* request or response streaming reassembly data */
364 | http_streaming_reassembly_data_t* req_streaming_reassembly_data;
365 | http_streaming_reassembly_data_t* res_streaming_reassembly_data;
366 | /* request and response headers */
367 | wmem_map_t *request_headers;
368 | wmem_map_t *response_headers;
369 | } http_req_res_private_data_t;
370 |
371 | typedef struct _request_trans_t {
372 | uint64_t first_range_num;
373 | nstime_t abs_time;
374 | char *request_uri;
375 | uint32_t req_frame;
376 | } request_trans_t;
377 |
378 | typedef struct _match_trans_t {
379 | uint32_t req_frame;
380 | uint32_t resp_frame;
381 | nstime_t delta_time;
382 | char *request_uri;
383 | char *http_host;
384 | } match_trans_t;
385 |
386 | static int parse_http_status_code(const unsigned char *line, const unsigned char *lineend);
387 | static int is_http_request_or_reply(packet_info *pinfo, const char *data, unsigned linelen,
388 | media_container_type_t *type, ReqRespDissector
389 | *reqresp_dissector, http_conv_t *conv_data);
390 | static unsigned chunked_encoding_dissector(tvbuff_t **tvb_ptr, packet_info *pinfo,
391 | proto_tree *tree, unsigned offset);
392 | static bool_Bool valid_header_name(const unsigned char *line, unsigned header_len);
393 | static bool_Bool invalid_header_value_char(uint8_t c);
394 | static bool_Bool process_header(tvbuff_t *tvb, unsigned offset, unsigned next_offset,
395 | const unsigned char *line, unsigned linelen, unsigned colon_offset,
396 | packet_info *pinfo, proto_tree *tree,
397 | headers_t *eh_ptr, http_conv_t *conv_data,
398 | media_container_type_t http_type, wmem_map_t *header_value_map,
399 | wmem_allocator_t *header_value_map_allocator, bool_Bool streaming_chunk_mode);
400 | static int find_header_hf_value(tvbuff_t *tvb, unsigned offset, unsigned header_len);
401 | static bool_Bool check_auth_ntlmssp(proto_item *hdr_item, tvbuff_t *tvb,
402 | packet_info *pinfo, char *value);
403 | static bool_Bool check_auth_basic(proto_item *hdr_item, tvbuff_t *tvb,
404 | packet_info *pinfo, char *value);
405 | static bool_Bool check_auth_digest(proto_item* hdr_item, tvbuff_t* tvb, packet_info* pinfo _U___attribute__((unused)), char* value, unsigned offset, unsigned len);
406 | static bool_Bool check_auth_citrixbasic(proto_item *hdr_item, tvbuff_t *tvb, packet_info *pinfo,
407 | char *value, unsigned offset);
408 | static bool_Bool check_auth_kerberos(proto_item *hdr_item, tvbuff_t *tvb,
409 | packet_info *pinfo, const char *value);
410 |
411 | static dissector_table_t port_subdissector_table;
412 | static dissector_table_t media_type_subdissector_table;
413 | static dissector_table_t streaming_content_type_dissector_table;
414 | static dissector_table_t upgrade_subdissector_table;
415 | static heur_dissector_list_t heur_subdissector_list;
416 |
417 | static tap_packet_status
418 | http_eo_packet(void *tapdata, packet_info *pinfo, epan_dissect_t *edt _U___attribute__((unused)), const void *data, tap_flags_t flags _U___attribute__((unused)))
419 | {
420 | export_object_list_t *object_list = (export_object_list_t *)tapdata;
421 | const http_eo_t *eo_info = (const http_eo_t *)data;
422 | export_object_entry_t *entry;
423 |
424 | if(eo_info) { /* We have data waiting for us */
425 | /* These values will be freed when the Export Object window
426 | * is closed. */
427 | entry = g_new(export_object_entry_t, 1)((export_object_entry_t *) g_malloc_n ((1), sizeof (export_object_entry_t )));
428 |
429 | entry->pkt_num = pinfo->num;
430 | /* XXX: Should this remove the port, if any? It's only
431 | * for display, so probably not. */
432 | entry->hostname = g_strdup(eo_info->hostname)g_strdup_inline (eo_info->hostname);
433 | entry->content_type = g_strdup(eo_info->content_type)g_strdup_inline (eo_info->content_type);
434 | /* XXX: Should this remove the query portion, if any, from
435 | * the path? (Or should that be done in the dissector?) */
436 | entry->filename = eo_info->filename ? g_path_get_basename(eo_info->filename) : NULL((void*)0);
437 | entry->payload_len = tvb_captured_length(eo_info->payload);
438 | entry->payload_data = (uint8_t *)tvb_memdup(NULL((void*)0), eo_info->payload, 0, entry->payload_len);
439 |
440 | object_list->add_entry(object_list->gui_data, entry);
441 |
442 | return TAP_PACKET_REDRAW; /* State changed - window should be redrawn */
443 | } else {
444 | return TAP_PACKET_DONT_REDRAW; /* State unchanged - no window updates needed */
445 | }
446 | }
447 |
448 | /* --- HTTP Status Codes */
449 | /* Note: The reference for uncommented entries is RFC 2616 */
450 | const value_string vals_http_status_code[] = {
451 | { 100, "Continue" },
452 | { 101, "Switching Protocols" },
453 | { 102, "Processing" }, /* RFC 2518 */
454 | { 103, "Early Hints" }, /* RFC-ietf-httpbis-early-hints-05 */
455 | { 199, "Informational - Others" },
456 |
457 | { 200, "OK"},
458 | { 201, "Created"},
459 | { 202, "Accepted"},
460 | { 203, "Non-authoritative Information"},
461 | { 204, "No Content"},
462 | { 205, "Reset Content"},
463 | { 206, "Partial Content"},
464 | { 207, "Multi-Status"}, /* RFC 4918 */
465 | { 208, "Already Reported"}, /* RFC 5842 */
466 | { 226, "IM Used"}, /* RFC 3229 */
467 | { 299, "Success - Others"},
468 |
469 | { 300, "Multiple Choices"},
470 | { 301, "Moved Permanently"},
471 | { 302, "Found"},
472 | { 303, "See Other"},
473 | { 304, "Not Modified"},
474 | { 305, "Use Proxy"},
475 | { 307, "Temporary Redirect"},
476 | { 308, "Permanent Redirect"}, /* RFC 7538 */
477 | { 399, "Redirection - Others"},
478 |
479 | { 400, "Bad Request"},
480 | { 401, "Unauthorized"},
481 | { 402, "Payment Required"},
482 | { 403, "Forbidden"},
483 | { 404, "Not Found"},
484 | { 405, "Method Not Allowed"},
485 | { 406, "Not Acceptable"},
486 | { 407, "Proxy Authentication Required"},
487 | { 408, "Request Time-out"},
488 | { 409, "Conflict"},
489 | { 410, "Gone"},
490 | { 411, "Length Required"},
491 | { 412, "Precondition Failed"},
492 | { 413, "Request Entity Too Large"},
493 | { 414, "Request-URI Too Long"},
494 | { 415, "Unsupported Media Type"},
495 | { 416, "Requested Range Not Satisfiable"},
496 | { 417, "Expectation Failed"},
497 | { 418, "I'm a teapot"}, /* RFC 2324 */
498 | { 421, "Misdirected Request"}, /* RFC 7540 */
499 | { 422, "Unprocessable Entity"}, /* RFC 4918 */
500 | { 423, "Locked"}, /* RFC 4918 */
501 | { 424, "Failed Dependency"}, /* RFC 4918 */
502 | { 425, "Too Early"}, /* RFC 8470 */
503 | { 426, "Upgrade Required"}, /* RFC 2817 */
504 | { 428, "Precondition Required"}, /* RFC 6585 */
505 | { 429, "Too Many Requests"}, /* RFC 6585 */
506 | { 431, "Request Header Fields Too Large"}, /* RFC 6585 */
507 | { 451, "Unavailable For Legal Reasons"}, /* RFC 7725 */
508 | { 499, "Client Error - Others"},
509 |
510 | { 500, "Internal Server Error"},
511 | { 501, "Not Implemented"},
512 | { 502, "Bad Gateway"},
513 | { 503, "Service Unavailable"},
514 | { 504, "Gateway Time-out"},
515 | { 505, "HTTP Version not supported"},
516 | { 506, "Variant Also Negotiates"}, /* RFC 2295 */
517 | { 507, "Insufficient Storage"}, /* RFC 4918 */
518 | { 508, "Loop Detected"}, /* RFC 5842 */
519 | { 510, "Not Extended"}, /* RFC 2774 */
520 | { 511, "Network Authentication Required"}, /* RFC 6585 */
521 | { 599, "Server Error - Others"},
522 |
523 | { 0, NULL((void*)0)}
524 | };
525 |
526 | static const char* st_str_reqs = "HTTP Requests by Server";
527 | static const char* st_str_reqs_by_srv_addr = "HTTP Requests by Server Address";
528 | static const char* st_str_reqs_by_http_host = "HTTP Requests by HTTP Host";
529 | static const char* st_str_resps_by_srv_addr = "HTTP Responses by Server Address";
530 |
531 | static int st_node_reqs = -1;
532 | static int st_node_reqs_by_srv_addr = -1;
533 | static int st_node_reqs_by_http_host = -1;
534 | static int st_node_resps_by_srv_addr = -1;
535 |
536 | /* Parse HTTP path sub components RFC3986 Ch 3.3, 3.4 */
537 | void
538 | http_add_path_components_to_tree(tvbuff_t* tvb, packet_info* pinfo, proto_item* item, unsigned offset, unsigned length)
539 | {
540 | proto_item* ti;
541 | proto_tree* uri_tree;
542 | unsigned end_offset, end_path_offset, query_offset, path_len, query_len, parameter_offset;
543 | bool_Bool q_off_found, par_off_found;
544 | end_offset = offset + length;
545 | /* The Content-Location (and Referer) headers in HTTP 1.1, and the
546 | * :path header in HTTP/2 can be an absolute-URI or a partial-URI;
547 | * i.e. that they can include a path and a query, but not a fragment.
548 | * RFC 7230 2.7 Uniform Request Identifiers, RFC 7231 Appendices C and D,
549 | * RFC 7540 8.1.2.3. Request Pseudo-Header Fields
550 | * Look for a ? to mark a query.
551 | */
552 | q_off_found = tvb_find_uint8_length(tvb, offset, length, '?', &query_offset);
553 | end_path_offset = (q_off_found == false0) ? end_offset : query_offset;
554 | par_off_found = tvb_ws_mempbrk_uint8_length(tvb, offset + 1, end_path_offset - offset - 1, &pbrk_sub_delims, &parameter_offset, NULL((void*)0));
555 | if (q_off_found == false0 && par_off_found == false0) {
556 | /* Nothing interesting, no need to split. */
557 | return;
558 | }
559 | uri_tree = proto_item_add_subtree(item, ett_http_request_uri);
560 | path_len = end_path_offset - offset;
561 | proto_tree_add_item(uri_tree, hf_http_request_path, tvb, offset, path_len, ENC_ASCII0x00000000);
562 | if (!tvb_ws_mempbrk_uint8_length(tvb, offset + 1, end_path_offset - offset - 1, &pbrk_sub_delims, &parameter_offset, NULL((void*)0))) {
563 | proto_tree* path_tree = proto_item_add_subtree(item, ett_http_request_path);
564 | while (offset < end_path_offset) {
565 | if (!tvb_ws_mempbrk_uint8_length(tvb, offset + 1, end_path_offset - offset - 1, &pbrk_sub_delims, &parameter_offset, NULL((void*)0))) {
566 | parameter_offset = end_path_offset;
567 | }
568 | proto_tree_add_item(path_tree, hf_http_request_path_segment, tvb, offset, parameter_offset - offset, ENC_ASCII0x00000000);
569 | offset = parameter_offset + 1;
570 | }
571 | }
572 | if (q_off_found == false0) {
573 | return;
574 | }
575 | /* Skip past the delimiter. */
576 | query_offset++;
577 | query_len = end_offset - query_offset;
578 | offset = query_offset;
579 | ti = proto_tree_add_item(uri_tree, hf_http_request_query, tvb, query_offset, query_len, ENC_ASCII0x00000000);
580 | proto_tree *query_tree = proto_item_add_subtree(ti, ett_http_request_query);
581 | while (offset < end_offset) {
582 | if (!tvb_ws_mempbrk_uint8_length(tvb, offset + 1, end_offset - offset - 1, &pbrk_sub_delims, &parameter_offset, NULL((void*)0))) {
583 | parameter_offset = end_offset;
584 | }
585 | proto_tree_add_item(query_tree, hf_http_request_query_parameter, tvb, offset, parameter_offset - offset, ENC_ASCII0x00000000);
586 |
587 | // RFC 8484 - DNS Queries over HTTPS (DoH)
588 | if (!tvb_strneql(tvb, offset, "dns=", 4)) {
589 | unsigned parameter_value_length = parameter_offset - offset - 4;
590 | // The Base64 decode functions just silently skip over
591 | // invalid bytes, so we check the length. (It might be
592 | // nice for those functions to do the checking.)
593 | // Padding is expressely omitted
594 | // https://www.rfc-editor.org/info/rfc8484/#section-6
595 | // as allowed by base64url
596 | // https://www.rfc-editor.org/info/rfc4648/#section-5
597 | // https://www.rfc-editor.org/info/rfc4648/#section-3.2
598 | // which makes the expected length calculation a bit
599 | // tedious.
600 | // https://www.rfc-editor.org/info/rfc4648/#section-4
601 | unsigned expected_dns_tvb_length = (parameter_value_length / 4) * 3;
602 | // parameter_value_length % 4 == 1 should perhaps just
603 | // be rejected, it's not valid encoding output.
604 | expected_dns_tvb_length += ((parameter_value_length % 4) + 1) / 2;
605 | tvbuff_t *dns_tvb = base64uri_tvb_to_new_tvb(tvb, offset + 4, parameter_value_length);
606 | if (tvb_reported_length(dns_tvb) == expected_dns_tvb_length &&
607 | expected_dns_tvb_length >= 30) { // Check if parameter value was likely base64uri encoded DNS query
608 | add_new_data_source(pinfo, dns_tvb, "DNS query");
609 | const char *save_match_string = pinfo->match_string;
610 | pinfo->match_string = "application/dns-message"; // The DNS dissector needs this for DOH
611 | dissector_try_string_with_data(media_type_subdissector_table, "application/dns-message",
612 | dns_tvb, pinfo, query_tree, true1, NULL((void*)0));
613 | pinfo->match_string = save_match_string;
614 | }
615 | }
616 |
617 | offset = parameter_offset + 1;
618 | }
619 | }
620 |
621 | /* HTTP/Load Distribution stats init function */
622 | static void
623 | http_reqs_stats_tree_init(stats_tree* st)
624 | {
625 | st_node_reqs = stats_tree_create_node(st, st_str_reqs, 0, STAT_DT_INT, true1);
626 | st_node_reqs_by_srv_addr = stats_tree_create_node(st, st_str_reqs_by_srv_addr, st_node_reqs, STAT_DT_INT, true1);
627 | st_node_reqs_by_http_host = stats_tree_create_node(st, st_str_reqs_by_http_host, st_node_reqs, STAT_DT_INT, true1);
628 | st_node_resps_by_srv_addr = stats_tree_create_node(st, st_str_resps_by_srv_addr, 0, STAT_DT_INT, true1);
629 | }
630 |
631 | /* HTTP/Load Distribution stats packet function */
632 | static tap_packet_status
633 | http_reqs_stats_tree_packet(stats_tree* st, packet_info* pinfo, epan_dissect_t* edt _U___attribute__((unused)), const void* p, tap_flags_t flags _U___attribute__((unused)))
634 | {
635 | const http_info_value_t* v = (const http_info_value_t*)p;
636 | int reqs_by_this_host;
637 | int reqs_by_this_addr;
638 | int resps_by_this_addr;
639 | int i = v->response_code;
640 | char *ip_str;
641 |
642 |
643 | if (v->request_method) {
644 | ip_str = address_to_str(NULL((void*)0), &pinfo->dst);
645 |
646 | tick_stat_node(st, st_str_reqs, 0, false)(stats_tree_manip_node_int(MN_INCREASE,(st),(st_str_reqs),(0) ,(0),1));
647 | tick_stat_node(st, st_str_reqs_by_srv_addr, st_node_reqs, true)(stats_tree_manip_node_int(MN_INCREASE,(st),(st_str_reqs_by_srv_addr ),(st_node_reqs),(1),1));
648 | tick_stat_node(st, st_str_reqs_by_http_host, st_node_reqs, true)(stats_tree_manip_node_int(MN_INCREASE,(st),(st_str_reqs_by_http_host ),(st_node_reqs),(1),1));
649 | reqs_by_this_addr = tick_stat_node(st, ip_str, st_node_reqs_by_srv_addr, true)(stats_tree_manip_node_int(MN_INCREASE,(st),(ip_str),(st_node_reqs_by_srv_addr ),(1),1));
650 |
651 | if (v->http_host) {
652 | reqs_by_this_host = tick_stat_node(st, v->http_host, st_node_reqs_by_http_host, true)(stats_tree_manip_node_int(MN_INCREASE,(st),(v->http_host) ,(st_node_reqs_by_http_host),(1),1));
653 | tick_stat_node(st, ip_str, reqs_by_this_host, false)(stats_tree_manip_node_int(MN_INCREASE,(st),(ip_str),(reqs_by_this_host ),(0),1));
654 |
655 | tick_stat_node(st, v->http_host, reqs_by_this_addr, false)(stats_tree_manip_node_int(MN_INCREASE,(st),(v->http_host) ,(reqs_by_this_addr),(0),1));
656 | }
657 |
658 | wmem_free(NULL((void*)0), ip_str);
659 |
660 | return TAP_PACKET_REDRAW;
661 |
662 | } else if (i != 0) {
663 | ip_str = address_to_str(NULL((void*)0), &pinfo->src);
664 |
665 | tick_stat_node(st, st_str_resps_by_srv_addr, 0, false)(stats_tree_manip_node_int(MN_INCREASE,(st),(st_str_resps_by_srv_addr ),(0),(0),1));
666 | resps_by_this_addr = tick_stat_node(st, ip_str, st_node_resps_by_srv_addr, true)(stats_tree_manip_node_int(MN_INCREASE,(st),(ip_str),(st_node_resps_by_srv_addr ),(1),1));
667 |
668 | if ( (i>=100)&&(i<400) ) {
669 | tick_stat_node(st, "OK", resps_by_this_addr, false)(stats_tree_manip_node_int(MN_INCREASE,(st),("OK"),(resps_by_this_addr ),(0),1));
670 | } else {
671 | tick_stat_node(st, "Error", resps_by_this_addr, false)(stats_tree_manip_node_int(MN_INCREASE,(st),("Error"),(resps_by_this_addr ),(0),1));
672 | }
673 |
674 | wmem_free(NULL((void*)0), ip_str);
675 |
676 | return TAP_PACKET_REDRAW;
677 | }
678 |
679 | return TAP_PACKET_DONT_REDRAW;
680 | }
681 |
682 |
683 | static int st_node_requests_by_host = -1;
684 | static const char *st_str_requests_by_host = "HTTP Requests by HTTP Host";
685 |
686 | /* HTTP/Requests stats init function */
687 | static void
688 | http_req_stats_tree_init(stats_tree* st)
689 | {
690 | st_node_requests_by_host = stats_tree_create_node(st, st_str_requests_by_host, 0, STAT_DT_INT, true1);
691 | }
692 |
693 | /* HTTP/Requests stats packet function */
694 | static tap_packet_status
695 | http_req_stats_tree_packet(stats_tree* st, packet_info* pinfo _U___attribute__((unused)), epan_dissect_t* edt _U___attribute__((unused)), const void* p, tap_flags_t flags _U___attribute__((unused)))
696 | {
697 | const http_info_value_t* v = (const http_info_value_t*)p;
698 | int reqs_by_this_host;
699 |
700 | if (v->request_method) {
701 | tick_stat_node(st, st_str_requests_by_host, 0, false)(stats_tree_manip_node_int(MN_INCREASE,(st),(st_str_requests_by_host ),(0),(0),1));
702 |
703 | if (v->http_host) {
704 | reqs_by_this_host = tick_stat_node(st, v->http_host, st_node_requests_by_host, true)(stats_tree_manip_node_int(MN_INCREASE,(st),(v->http_host) ,(st_node_requests_by_host),(1),1));
705 |
706 | if (v->request_uri) {
707 | tick_stat_node(st, v->request_uri, reqs_by_this_host, true)(stats_tree_manip_node_int(MN_INCREASE,(st),(v->request_uri ),(reqs_by_this_host),(1),1));
708 | }
709 | }
710 |
711 | return TAP_PACKET_REDRAW;
712 | }
713 |
714 | return TAP_PACKET_DONT_REDRAW;
715 | }
716 |
717 | static const char *st_str_packets = "Total HTTP Packets";
718 | static const char *st_str_requests = "HTTP Request Packets";
719 | static const char *st_str_responses = "HTTP Response Packets";
720 | static const char *st_str_resp_broken = "???: broken";
721 | static const char *st_str_resp_100 = "1xx: Informational";
722 | static const char *st_str_resp_200 = "2xx: Success";
723 | static const char *st_str_resp_300 = "3xx: Redirection";
724 | static const char *st_str_resp_400 = "4xx: Client Error";
725 | static const char *st_str_resp_500 = "5xx: Server Error";
726 | static const char *st_str_other = "Other HTTP Packets";
727 |
728 | static int st_node_packets = -1;
729 | static int st_node_requests = -1;
730 | static int st_node_responses = -1;
731 | static int st_node_resp_broken = -1;
732 | static int st_node_resp_100 = -1;
733 | static int st_node_resp_200 = -1;
734 | static int st_node_resp_300 = -1;
735 | static int st_node_resp_400 = -1;
736 | static int st_node_resp_500 = -1;
737 | static int st_node_other = -1;
738 |
739 |
740 | /* HTTP/Packet Counter stats init function */
741 | static void
742 | http_stats_tree_init(stats_tree* st)
743 | {
744 | st_node_packets = stats_tree_create_node(st, st_str_packets, 0, STAT_DT_INT, true1);
745 | st_node_requests = stats_tree_create_pivot(st, st_str_requests, st_node_packets);
746 | st_node_responses = stats_tree_create_node(st, st_str_responses, st_node_packets, STAT_DT_INT, true1);
747 | st_node_resp_broken = stats_tree_create_node(st, st_str_resp_broken, st_node_responses, STAT_DT_INT, true1);
748 | st_node_resp_100 = stats_tree_create_node(st, st_str_resp_100, st_node_responses, STAT_DT_INT, true1);
749 | st_node_resp_200 = stats_tree_create_node(st, st_str_resp_200, st_node_responses, STAT_DT_INT, true1);
750 | st_node_resp_300 = stats_tree_create_node(st, st_str_resp_300, st_node_responses, STAT_DT_INT, true1);
751 | st_node_resp_400 = stats_tree_create_node(st, st_str_resp_400, st_node_responses, STAT_DT_INT, true1);
752 | st_node_resp_500 = stats_tree_create_node(st, st_str_resp_500, st_node_responses, STAT_DT_INT, true1);
753 | st_node_other = stats_tree_create_node(st, st_str_other, st_node_packets, STAT_DT_INT, false0);
754 | }
755 |
756 | /* HTTP/Packet Counter stats packet function */
757 | static tap_packet_status
758 | http_stats_tree_packet(stats_tree* st, packet_info* pinfo, epan_dissect_t* edt _U___attribute__((unused)), const void* p, tap_flags_t flags _U___attribute__((unused)))
759 | {
760 | const http_info_value_t* v = (const http_info_value_t*)p;
761 | unsigned i = v->response_code;
762 | int resp_grp;
763 | const char *resp_str;
764 | char* str;
765 |
766 | tick_stat_node(st, st_str_packets, 0, false)(stats_tree_manip_node_int(MN_INCREASE,(st),(st_str_packets), (0),(0),1));
767 |
768 | if (i) {
769 | tick_stat_node(st, st_str_responses, st_node_packets, false)(stats_tree_manip_node_int(MN_INCREASE,(st),(st_str_responses ),(st_node_packets),(0),1));
770 |
771 | if ( (i<100)||(i>=600) ) {
772 | resp_grp = st_node_resp_broken;
773 | resp_str = st_str_resp_broken;
774 | } else if (i<200) {
775 | resp_grp = st_node_resp_100;
776 | resp_str = st_str_resp_100;
777 | } else if (i<300) {
778 | resp_grp = st_node_resp_200;
779 | resp_str = st_str_resp_200;
780 | } else if (i<400) {
781 | resp_grp = st_node_resp_300;
782 | resp_str = st_str_resp_300;
783 | } else if (i<500) {
784 | resp_grp = st_node_resp_400;
785 | resp_str = st_str_resp_400;
786 | } else {
787 | resp_grp = st_node_resp_500;
788 | resp_str = st_str_resp_500;
789 | }
790 |
791 | tick_stat_node(st, resp_str, st_node_responses, false)(stats_tree_manip_node_int(MN_INCREASE,(st),(resp_str),(st_node_responses ),(0),1));
792 |
793 | str = wmem_strdup_printf(pinfo->pool, "%u %s", i,
794 | val_to_str(pinfo->pool, i, vals_http_status_code, "Unknown (%d)"));
795 | tick_stat_node(st, str, resp_grp, false)(stats_tree_manip_node_int(MN_INCREASE,(st),(str),(resp_grp), (0),1));
796 | } else if (v->request_method) {
797 | stats_tree_tick_pivot(st,st_node_requests,v->request_method);
798 | } else {
799 | tick_stat_node(st, st_str_other, st_node_packets, false)(stats_tree_manip_node_int(MN_INCREASE,(st),(st_str_other),(st_node_packets ),(0),1));
800 | }
801 |
802 | return TAP_PACKET_REDRAW;
803 | }
804 |
805 | /*
806 | Generates a referer tree - a best-effort representation of which web request led to which.
807 |
808 | Some challenges:
809 | A user can be forwarded to a single sites from multiple sources. For example,
810 | google.com -> foo.com and bing.com -> foo.com. A URI alone is not unique.
811 |
812 | Additionally, if a user has a subsequent request to foo.com -> bar.com, the
813 | full chain could either be:
814 | google.com -> foo.com -> bar.com, or
815 | bing.com -> foo.com -> bar.com,
816 |
817 | This indicates that a URI and its referer are not unique. Only a URI and its
818 | full referer chain are unique. However, HTTP requests only contain the URI
819 | and the immediate referer. This means that any attempt at generating a
820 | referer tree is inherently going to be a best-effort approach.
821 |
822 | This code assumes that the referer in a request is from the most-recent request
823 | to that referer.
824 |
825 | * To maintain readability of the statistics, whenever a site is visited, all
826 | prior referers are 'ticked' as well, so that one can easily see the breakdown.
827 | */
828 |
829 | /* Root node for all referer statistics */
830 | static int st_node_requests_by_referer = -1;
831 | /* Referer statistics root node's text */
832 | static const char *st_str_request_sequences = "HTTP Request Sequences";
833 |
834 | /* Mapping of URIs to the most-recently seen node id */
835 | static wmem_map_t* refstats_uri_to_node_id_hash;
836 | /* Mapping of node ids to the node's URI ('name' value) */
837 | static wmem_map_t* refstats_node_id_to_uri_hash;
838 | /* Mapping of node ids to the parent node id */
839 | static wmem_map_t* refstats_node_id_to_parent_node_id_hash;
840 |
841 |
842 | /* HTTP/Request Sequences stats init function */
843 | static void
844 | http_seq_stats_tree_init(stats_tree* st)
845 | {
846 | int root_node_id = 0;
847 | void *root_node_id_p = GINT_TO_POINTER(root_node_id)((gpointer) (glong) (root_node_id));
848 | void *node_id_p = NULL((void*)0);
849 | char *uri = NULL((void*)0);
850 |
851 | refstats_node_id_to_parent_node_id_hash = wmem_map_new(wmem_file_scope(), g_direct_hash, g_direct_equal);
852 | refstats_node_id_to_uri_hash = wmem_map_new(wmem_file_scope(), g_direct_hash, g_direct_equal);
853 | refstats_uri_to_node_id_hash = wmem_map_new(wmem_file_scope(), wmem_str_hash, g_str_equal);
854 |
855 | /* Add the root node and its mappings */
856 | st_node_requests_by_referer = stats_tree_create_node(st, st_str_request_sequences, root_node_id, STAT_DT_INT, true1);
857 | node_id_p = GINT_TO_POINTER(st_node_requests_by_referer)((gpointer) (glong) (st_node_requests_by_referer));
858 | uri = wmem_strdup(wmem_file_scope(), st_str_request_sequences);
859 |
860 | wmem_map_insert(refstats_uri_to_node_id_hash, uri, node_id_p);
861 | wmem_map_insert(refstats_node_id_to_uri_hash, node_id_p, uri);
862 | wmem_map_insert(refstats_node_id_to_parent_node_id_hash, node_id_p, root_node_id_p);
863 | }
864 |
865 | static int
866 | http_seq_stats_tick_referer(stats_tree* st, const char* arg_referer_uri)
867 | {
868 | int root_node_id = st_node_requests_by_referer;
869 | void *root_node_id_p = GINT_TO_POINTER(st_node_requests_by_referer)((gpointer) (glong) (st_node_requests_by_referer));
870 | int referer_node_id;
871 | void *referer_node_id_p;
872 | int referer_parent_node_id;
873 | void *referer_parent_node_id_p;
874 | char *referer_uri;
875 |
876 | /* Tick the referer's URI */
877 | /* Does the node exist? */
878 | if (!wmem_map_lookup_extended(refstats_uri_to_node_id_hash, arg_referer_uri, NULL((void*)0), &referer_node_id_p)) {
879 | /* The node for the referer didn't already exist, create the mappings */
880 | referer_node_id = tick_stat_node(st, arg_referer_uri, root_node_id, true)(stats_tree_manip_node_int(MN_INCREASE,(st),(arg_referer_uri) ,(root_node_id),(1),1));
881 | referer_node_id_p = GINT_TO_POINTER(referer_node_id)((gpointer) (glong) (referer_node_id));
882 | referer_parent_node_id_p = root_node_id_p;
883 |
884 | referer_uri = wmem_strdup(wmem_file_scope(), arg_referer_uri);
885 | wmem_map_insert(refstats_uri_to_node_id_hash, referer_uri, referer_node_id_p);
886 | wmem_map_insert(refstats_node_id_to_uri_hash, referer_node_id_p, referer_uri);
887 | wmem_map_insert(refstats_node_id_to_parent_node_id_hash, referer_node_id_p, referer_parent_node_id_p);
888 | } else {
889 | /* The node for the referer already exists, tick it */
890 | referer_parent_node_id_p = wmem_map_lookup(refstats_node_id_to_parent_node_id_hash, referer_node_id_p);
891 | referer_parent_node_id = GPOINTER_TO_INT(referer_parent_node_id_p)((gint) (glong) (referer_parent_node_id_p));
892 | referer_node_id = tick_stat_node(st, arg_referer_uri, referer_parent_node_id, true)(stats_tree_manip_node_int(MN_INCREASE,(st),(arg_referer_uri) ,(referer_parent_node_id),(1),1));
893 | }
894 | return referer_node_id;
895 | }
896 |
897 | static void
898 | http_seq_stats_tick_request(stats_tree* st, const char* arg_full_uri, int referer_node_id)
899 | {
900 | void *referer_node_id_p = GINT_TO_POINTER(referer_node_id)((gpointer) (glong) (referer_node_id));
901 | int node_id;
902 | void *node_id_p;
903 | char *uri;
904 |
905 | node_id = tick_stat_node(st, arg_full_uri, referer_node_id, true)(stats_tree_manip_node_int(MN_INCREASE,(st),(arg_full_uri),(referer_node_id ),(1),1));
906 | node_id_p = GINT_TO_POINTER(node_id)((gpointer) (glong) (node_id));
907 |
908 | /* Update the mappings. Even if the URI was already seen, the URI->node mapping may need to be updated */
909 |
910 | /* Is this a new node? */
911 | uri = (char *) wmem_map_lookup(refstats_node_id_to_uri_hash, node_id_p);
912 | if (!uri) {
913 | /* node not found, add mappings for the node and uri */
914 | uri = wmem_strdup(wmem_file_scope(), arg_full_uri);
915 |
916 | wmem_map_insert(refstats_uri_to_node_id_hash, uri, node_id_p);
917 | wmem_map_insert(refstats_node_id_to_uri_hash, node_id_p, uri);
918 | wmem_map_insert(refstats_node_id_to_parent_node_id_hash, node_id_p, referer_node_id_p);
919 | } else {
920 | /* We've seen the node id before. Update the URI mapping refer to this node id*/
921 | wmem_map_insert(refstats_uri_to_node_id_hash, uri, node_id_p);
922 | }
923 | }
924 |
925 | char*
926 | determine_http_location_target(wmem_allocator_t *scope, const char *base_url, const char * location_url)
927 | {
928 | /* Resolving a base URI + relative URI to an absolute URI ("Relative Resolution")
929 | is complicated. Because of that, we take shortcuts that may result in
930 | inaccurate results, but is also significantly simpler.
931 | It would be best to use an external library to do this for us.
932 | For reference, the RFC is located at https://tools.ietf.org/html/rfc3986#section-5.4
933 |
934 | Returns NULL if the resolution fails
935 | */
936 | char *final_target;
937 |
938 | /* base_url must be an absolute URL.*/
939 | if (strstr(base_url, "://") == NULL((void*)0)){
940 | return NULL((void*)0);
941 | }
942 |
943 | /* Empty Location */
944 | if (location_url[0] == '\0') {
945 | final_target = wmem_strdup(scope, base_url);
946 | return final_target;
947 | }
948 | /* Protocol Relative */
949 | else if (g_str_has_prefix(location_url, "//")(__builtin_constant_p ("//")? __extension__ ({ const char * const __str = (location_url); const char * const __prefix = ("//") ; gboolean __result = (0); if (__str == ((void*)0) || __prefix == ((void*)0)) __result = (g_str_has_prefix) (__str, __prefix ); else { const size_t __str_len = strlen (((__str) + !(__str ))); const size_t __prefix_len = strlen (((__prefix) + !(__prefix ))); if (__str_len >= __prefix_len) __result = memcmp (((__str ) + !(__str)), ((__prefix) + !(__prefix)), __prefix_len) == 0 ; } __result; }) : (g_str_has_prefix) (location_url, "//") ) ) {
950 | char *base_scheme = g_uri_parse_scheme(base_url);
951 | if (base_scheme == NULL((void*)0)) {
952 | return NULL((void*)0);
953 | }
954 | final_target = wmem_strdup_printf(scope, "%s:%s", base_scheme, location_url);
955 | g_free(base_scheme)(__builtin_object_size ((base_scheme), 0) != ((size_t) - 1)) ? g_free_sized (base_scheme, __builtin_object_size ((base_scheme ), 0)) : (g_free) (base_scheme);
956 | return final_target;
957 | }
958 | /* Absolute URL*/
959 | else if (strstr(location_url, "://") != NULL((void*)0)) {
960 | final_target = wmem_strdup(scope, location_url);
961 | return final_target;
962 | }
963 | /* Relative */
964 | else {
965 | char *start_fragment = strstr(base_url, "#");
966 | char *start_query = NULL((void*)0);
967 | char *base_url_no_fragment = NULL((void*)0);
968 | char *base_url_no_query = NULL((void*)0);
969 |
970 | /* Strip off the fragment (which should never be present)*/
971 | if (start_fragment == NULL((void*)0)) {
972 | base_url_no_fragment = wmem_strdup(scope, base_url);
973 | }
974 | else {
975 | base_url_no_fragment = wmem_strndup(scope, base_url, start_fragment - base_url);
976 | }
977 |
978 | /* Strip off the query (Queries are stripped from all relative URIs) */
979 | start_query = strstr(base_url_no_fragment, "?");
980 | if (start_query == NULL((void*)0)) {
981 | base_url_no_query = wmem_strdup(scope, base_url_no_fragment);
982 | }
983 | else {
984 | base_url_no_query = wmem_strndup(scope, base_url_no_fragment, start_query - base_url_no_fragment);
985 | }
986 |
987 | /* A leading question mark (?) means to replace the old query with the new*/
988 | if (g_str_has_prefix(location_url, "?")(__builtin_constant_p ("?")? __extension__ ({ const char * const __str = (location_url); const char * const __prefix = ("?"); gboolean __result = (0); if (__str == ((void*)0) || __prefix == ((void*)0)) __result = (g_str_has_prefix) (__str, __prefix ); else { const size_t __str_len = strlen (((__str) + !(__str ))); const size_t __prefix_len = strlen (((__prefix) + !(__prefix ))); if (__str_len >= __prefix_len) __result = memcmp (((__str ) + !(__str)), ((__prefix) + !(__prefix)), __prefix_len) == 0 ; } __result; }) : (g_str_has_prefix) (location_url, "?") )) {
989 | final_target = wmem_strdup_printf(scope, "%s%s", base_url_no_query, location_url);
990 | return final_target;
991 | }
992 | else {
993 | /* We have already tested strstr(base_url) above */
994 | char *scheme_end;
995 | scheme_end = strstr(base_url_no_query, "://");
996 | if (!(scheme_end)) {
997 | return NULL((void*)0);
998 | }
999 | scheme_end += strlen("://");
1000 | /* A leading slash means to put the location after the netloc */
1001 | if (g_str_has_prefix(location_url, "/")(__builtin_constant_p ("/")? __extension__ ({ const char * const __str = (location_url); const char * const __prefix = ("/"); gboolean __result = (0); if (__str == ((void*)0) || __prefix == ((void*)0)) __result = (g_str_has_prefix) (__str, __prefix ); else { const size_t __str_len = strlen (((__str) + !(__str ))); const size_t __prefix_len = strlen (((__prefix) + !(__prefix ))); if (__str_len >= __prefix_len) __result = memcmp (((__str ) + !(__str)), ((__prefix) + !(__prefix)), __prefix_len) == 0 ; } __result; }) : (g_str_has_prefix) (location_url, "/") )) {
1002 | char *netloc_end;
1003 | int netloc_length;
1004 |
1005 | netloc_end = strstr(scheme_end, "/");
1006 | if (!(netloc_end)) {
1007 | return NULL((void*)0);
1008 | }
1009 | netloc_length = (int) (netloc_end - base_url_no_query);
1010 | final_target = wmem_strdup_printf(scope, "%.*s%s", netloc_length, base_url_no_query, location_url);
1011 | return final_target;
1012 | }
1013 | /* Otherwise, it replaces the last element in the URI */
1014 | else {
1015 | const char *end_of_path = g_strrstr(scheme_end, "/");
1016 |
1017 | if (end_of_path != NULL((void*)0)) {
1018 | int base_through_path = (int) (end_of_path - base_url_no_query);
1019 | final_target = wmem_strdup_printf(scope, "%.*s/%s", base_through_path, base_url_no_query, location_url);
1020 | }
1021 | else {
1022 | final_target = wmem_strdup_printf(scope, "%s/%s", base_url_no_query, location_url);
1023 | }
1024 | return final_target;
1025 | }
1026 | }
1027 | }
1028 | return NULL((void*)0);
1029 | }
1030 |
1031 | /* HTTP/Request Sequences stats packet function */
1032 | static tap_packet_status
1033 | http_seq_stats_tree_packet(stats_tree* st, packet_info* pinfo, epan_dissect_t* edt _U___attribute__((unused)), const void* p, tap_flags_t flags _U___attribute__((unused)))
1034 | {
1035 | const http_info_value_t* v = (const http_info_value_t*)p;
1036 |
1037 | /* Track HTTP Redirects */
1038 | if (v->location_target && v->location_base_uri) {
1039 | int referer_node_id;
1040 | int parent_node_id;
1041 | void *parent_node_id_p;
1042 | void *current_node_id_p;
1043 | char *uri = NULL((void*)0);
1044 |
1045 | char *absolute_target = determine_http_location_target(pinfo->pool, v->location_base_uri, v->location_target);
1046 | /* absolute_target is NULL if the resolution fails */
1047 | if (absolute_target != NULL((void*)0)) {
1048 | /* We assume the user makes the request to the absolute_target */
1049 | /* Tick the base URI */
1050 | referer_node_id = http_seq_stats_tick_referer(st, v->location_base_uri);
1051 |
1052 | /* Tick the location header's resolved URI */
1053 | http_seq_stats_tick_request(st, absolute_target, referer_node_id);
1054 |
1055 | /* Tick all stats nodes above the location */
1056 | current_node_id_p = GINT_TO_POINTER(referer_node_id)((gpointer) (glong) (referer_node_id));
1057 | while (wmem_map_lookup_extended(refstats_node_id_to_parent_node_id_hash, current_node_id_p, NULL((void*)0), &parent_node_id_p)) {
1058 | parent_node_id = GPOINTER_TO_INT(parent_node_id_p)((gint) (glong) (parent_node_id_p));
1059 | uri = (char *) wmem_map_lookup(refstats_node_id_to_uri_hash, current_node_id_p);
1060 | tick_stat_node(st, uri, parent_node_id, true)(stats_tree_manip_node_int(MN_INCREASE,(st),(uri),(parent_node_id ),(1),1));
1061 | current_node_id_p = parent_node_id_p;
1062 | }
1063 | }
1064 | }
1065 |
1066 | /* Track HTTP Requests/Referers */
1067 | if (v->request_method && v->referer_uri && v->full_uri) {
1068 | int referer_node_id;
1069 | int parent_node_id;
1070 | void *parent_node_id_p;
1071 | void *current_node_id_p;
1072 | char *uri = NULL((void*)0);
1073 | /* Tick the referer's URI */
1074 | referer_node_id = http_seq_stats_tick_referer(st, v->referer_uri);
1075 |
1076 | /* Tick the request's URI */
1077 | http_seq_stats_tick_request(st, v->full_uri, referer_node_id);
1078 |
1079 | /* Tick all stats nodes above the referer */
1080 | current_node_id_p = GINT_TO_POINTER(referer_node_id)((gpointer) (glong) (referer_node_id));
1081 | while (wmem_map_lookup_extended(refstats_node_id_to_parent_node_id_hash, current_node_id_p, NULL((void*)0), &parent_node_id_p)) {
1082 | parent_node_id = GPOINTER_TO_INT(parent_node_id_p)((gint) (glong) (parent_node_id_p));
1083 | uri = (char *) wmem_map_lookup(refstats_node_id_to_uri_hash, current_node_id_p);
1084 | tick_stat_node(st, uri, parent_node_id, true)(stats_tree_manip_node_int(MN_INCREASE,(st),(uri),(parent_node_id ),(1),1));
1085 | current_node_id_p = parent_node_id_p;
1086 | }
1087 | }
1088 | return TAP_PACKET_DONT_REDRAW;
1089 | }
1090 |
1091 |
1092 | static void
1093 | dissect_http_ntlmssp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
1094 | const char *line)
1095 | {
1096 | tvbuff_t *ntlmssp_tvb;
1097 |
1098 | ntlmssp_tvb = base64_to_tvb(tvb, line);
1099 | add_new_data_source(pinfo, ntlmssp_tvb, "NTLMSSP / GSSAPI Data");
1100 | if (tvb_strneql(ntlmssp_tvb, 0, "NTLMSSP", 7) == 0)
1101 | call_dissector(ntlmssp_handle, ntlmssp_tvb, pinfo, tree);
1102 | else
1103 | call_dissector(gssapi_handle, ntlmssp_tvb, pinfo, tree);
1104 | }
1105 |
1106 | static void
1107 | dissect_http_kerberos(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
1108 | const char *line)
1109 | {
1110 | tvbuff_t *kerberos_tvb;
1111 |
1112 | kerberos_tvb = base64_to_tvb(tvb, line + 9); /* skip 'Kerberos ' which is 9 chars */
1113 | add_new_data_source(pinfo, kerberos_tvb, "Kerberos Data");
1114 | call_dissector(gssapi_handle, kerberos_tvb, pinfo, tree);
1115 |
1116 | }
1117 |
1118 |
1119 | static http_conv_t *
1120 | get_http_conversation_data(packet_info *pinfo, conversation_t **conversation)
1121 | {
1122 | http_conv_t *conv_data;
1123 |
1124 | *conversation = find_or_create_conversation(pinfo);
1125 |
1126 | /* Retrieve information from conversation
1127 | * or add it if it isn't there yet
1128 | */
1129 | conv_data = (http_conv_t *)conversation_get_proto_data(*conversation, proto_http);
1130 | if(!conv_data) {
1131 | /* Setup the conversation structure itself */
1132 | conv_data = wmem_new0(wmem_file_scope(), http_conv_t)((http_conv_t*)wmem_alloc0((wmem_file_scope()), sizeof(http_conv_t )));
1133 | conv_data->chunk_offsets_fwd = wmem_map_new(wmem_file_scope(), g_direct_hash, g_direct_equal);
1134 | conv_data->chunk_offsets_rev = wmem_map_new(wmem_file_scope(), g_direct_hash, g_direct_equal);
1135 | conv_data->req_list = wmem_list_new(wmem_file_scope());
1136 | conv_data->matches_table = wmem_map_new(wmem_file_scope(), g_direct_hash, g_direct_equal);
1137 |
1138 | conversation_add_proto_data(*conversation, proto_http,
1139 | conv_data);
1140 | }
1141 |
1142 | return conv_data;
1143 | }
1144 |
1145 | /**
1146 | * create a new http_req_res_t and add it to the conversation.
1147 | * @return the new allocated object which is already added to the linked list
1148 | */
1149 | static http_req_res_t*
1150 | push_req_res(http_conv_t *conv_data)
1151 | {
1152 | http_req_res_t *req_res = wmem_new0(wmem_file_scope(), http_req_res_t)((http_req_res_t*)wmem_alloc0((wmem_file_scope()), sizeof(http_req_res_t )));
1153 |
1154 | nstime_set_unset(&(req_res->req_ts));
1155 | conv_data->req_res_tail = req_res;
1156 | req_res->private_data = wmem_new0(wmem_file_scope(), http_req_res_private_data_t)((http_req_res_private_data_t*)wmem_alloc0((wmem_file_scope() ), sizeof(http_req_res_private_data_t)));
1157 |
1158 | return req_res;
1159 | }
1160 |
1161 | /**
1162 | * push a request frame number and its time stamp to the conversation data.
1163 | */
1164 | static http_req_res_t*
1165 | push_req(http_conv_t *conv_data, packet_info *pinfo)
1166 | {
1167 | /* a request will always create a new http_req_res_t object */
1168 | http_req_res_t *req_res = push_req_res(conv_data);
1169 |
1170 | req_res->req_framenum = pinfo->num;
1171 | req_res->req_ts = pinfo->abs_ts;
1172 |
1173 | /* XXX: Using the same proto key for the frame doesn't work well
1174 | * with HTTP 1.1 pipelining, or other situations where more
1175 | * than one request can appear in a frame.
1176 | */
1177 | p_add_proto_data(wmem_file_scope(), pinfo, proto_http, HTTP_PROTO_DATA_REQRES0, req_res);
1178 |
1179 | return req_res;
1180 | }
1181 |
1182 | /**
1183 | * push a response frame number to the conversation data.
1184 | */
1185 | static http_req_res_t*
1186 | push_res(http_conv_t *conv_data, packet_info *pinfo)
1187 | {
1188 | /* a response will create a new http_req_res_t object: if no
1189 | object exists, or if the most recent one is already for
1190 | a different response. (Exception: If the previous response
1191 | code was in the Informational 1xx category, then it was
1192 | an interim response, and this response could be for the same
1193 | request.) In both cases the corresponding request was not
1194 | detected/included in the conversation. In all other cases
1195 | the http_req_res_t object created by the request is
1196 | used. */
1197 | /* XXX: This finds the only most recent request and doesn't support
1198 | * HTTP 1.1 pipelining. This limitation has been addressed for
1199 | * HTTP GETS if Range Requests are supported.
1200 | */
1201 | http_req_res_t *req_res = conv_data->req_res_tail;
1202 | if (!req_res || (req_res->res_framenum > 0 && req_res->response_code >= 200)) {
1203 | req_res = push_req_res(conv_data);
1204 | }
1205 | req_res->res_framenum = pinfo->num;
1206 | /* XXX: Using the same proto key for the frame doesn't work well
1207 | * with HTTP 1.1 pipelining, or other situations where more
1208 | * than one request can appear in a frame and multiple outstanding
1209 | * GET requests. The latter has been addressed with matches_table."
1210 | */
1211 | p_add_proto_data(wmem_file_scope(), pinfo, proto_http, HTTP_PROTO_DATA_REQRES0, req_res);
1212 |
1213 | return req_res;
1214 | }
1215 |
1216 | dissector_handle_t
1217 | http_upgrade_dissector(const char *protocol) {
1218 | return dissector_get_string_handle(upgrade_subdissector_table, protocol);
1219 | }
1220 |
1221 | static const char *
1222 | http_get_header_value(packet_info* pinfo, const char *name, bool_Bool the_other_direction) {
1223 | conversation_t* conv = find_or_create_conversation(pinfo);
1224 | const http_conv_t *conv_data = (http_conv_t *)conversation_get_proto_data(conv, proto_http);
1225 | if (conv_data) {
1226 | const http_req_res_t *req_res = conv_data->req_res_tail;
1227 | if (req_res && req_res->private_data) {
1228 | const http_req_res_private_data_t *private_data = (http_req_res_private_data_t *)req_res->private_data;
1229 | wmem_map_t *headers = (conv_data->server_port == pinfo->destport && the_other_direction) || (
1230 | conv_data->server_port == pinfo->srcport && !the_other_direction)
1231 | ? private_data->response_headers
1232 | : private_data->request_headers;
1233 | if (headers) {
1234 | return wmem_map_lookup(headers, name);
1235 | }
1236 | }
1237 | }
1238 | return NULL((void*)0);
1239 | }
1240 |
1241 | static int
1242 | dissect_http_message(tvbuff_t *tvb, unsigned offset, packet_info *pinfo,
1243 | proto_tree *tree, http_conv_t *conv_data,
1244 | const char* proto_tag, int proto, bool_Bool end_of_stream,
1245 | const uint32_t* const seq)
1246 | {
1247 | proto_tree *http_tree = NULL((void*)0);
1248 | proto_item *ti = NULL((void*)0);
1249 | proto_item *hidden_item;
1250 | const unsigned char *line, *firstline;
1251 | unsigned next_offset;
1252 | const unsigned char *linep, *lineend;
1253 | unsigned orig_offset = offset;
1254 | unsigned first_linelen, linelen;
1255 | bool_Bool is_request_or_reply, is_tls = false0;
1256 | bool_Bool saw_req_resp_or_header;
1257 | media_container_type_t http_type;
1258 | proto_item *hdr_item = NULL((void*)0);
1259 | ReqRespDissector reqresp_dissector;
1260 | proto_tree *req_tree;
1261 | unsigned colon_offset;
1262 | headers_t *headers = NULL((void*)0);
1263 | unsigned datalen;
1264 | int reported_datalen = -1;
1265 | dissector_handle_t handle = NULL((void*)0);
1266 | bool_Bool dissected = false0;
1267 | bool_Bool first_loop = true1;
1268 | bool_Bool have_seen_http = false0;
1269 | /*unsigned i;*/
1270 | /*http_info_value_t *si;*/
1271 | http_eo_t *eo_info;
1272 | heur_dtbl_entry_t *hdtbl_entry;
1273 | int reported_length;
1274 | uint16_t word;
1275 | bool_Bool leading_crlf = false0;
1276 | bool_Bool excess_data = false0;
1277 | media_content_info_t* content_info = NULL((void*)0);
1278 | wmem_map_t* header_value_map = NULL((void*)0);
1279 | int chunk_offset = 0;
1280 | wmem_map_t *chunk_map = NULL((void*)0);
1281 | wmem_allocator_t *header_value_map_allocator = NULL((void*)0);
1282 |
1283 | /*
1284 | * Originally this dissector only saved the header information (both in
1285 | * headers and header_value_map) in pinfo->pool scoped data, passing it
1286 | * to the (reassembled, if necessary) body contained in the message.
1287 | *
1288 | * Some protocols use the chunked transfer method to streaming data;
1289 | * the headers are not repeated before each chunk but some dissectors
1290 | * want the headers when dissecting each chunk (instead of saving the
1291 | * headers themselves when called for the first chunk.) So in that
1292 | * case the headers are saved in file scoped memory.
1293 | *
1294 | * Other protocols use the HTTP Upgrade mechanism; at least the first
1295 | * frame for the upgrade protocol (which is likely after the response
1296 | * that confirms the upgrade) will need a copy of the headers (likely
1297 | * the response header and probably the request as well.) In that case
1298 | * we also need to save the headers in file scoped memory.
1299 | *
1300 | * The current implementation saves the headers in file scoped memory
1301 | * for all request/response pairs (but not for stray headers outside
1302 | * of a request/response pair, often in fuzzed data.) It probably only
1303 | * needs to do so for the above two cases, which could mean initially
1304 | * allocating a map in pinfo->pool scope and then copying its contents
1305 | * to file scope after an Upgrade header is found in order to prevent
1306 | * memory consumption from growing over time for captures with HTTP
1307 | * that does *not* use Upgrade or streaming chunked transfer method.
1308 | * (For HTTP Upgrade both the request and response should have Upgrade
1309 | * headers.)
1310 | */
1311 |
1312 | /*
1313 | * For supporting dissecting chunked data in streaming reassembly mode.
1314 | *
1315 | * If a HTTP request or response is chunked encoding (the transfer-encoding
1316 | * header is 'chunked') and its content-type matching a subdissector in
1317 | * "streaming_content_type" dissector table, then we switch to dissect in
1318 | * streaming chunk mode. In streaming chunk mode, we dissect the data as soon
1319 | * as possible, unlike normal mode, we don't start reassembling until the end
1320 | * of the request or response message or at the end of the TCP stream. In
1321 | * streaming chunk mode, the first reassembled PDU contains HTTP headers
1322 | * and at least one completed chunk of this request or response message. And
1323 | * subsequent PDUs consist of one or more chunks:
1324 | *
1325 | * ----- +-- Reassembled Streaming Content PDU(s) --+-- Reassembled Streaming Content PDU(s) --+--- Reassembled ...
1326 | * HLProtos | 1*high-proto-pdu | 1*high-proto-pdu | 1*high-proto-pdu
1327 | * ----- +-------------------------------------+----+--------------------------------+---------+-------------------
1328 | * | de-chunked-data | de-chunked-data | de-chunked-data
1329 | * HTTP +-------- First Reassembled HTTP PDU -----------+--- Second Reassembled HTTP PDU -----+- Third PDU -+ +- Fourth ---
1330 | * | headers and 1*chunk | 1*chunk | 1*chunk | | 1*chunk ...
1331 | * ----- +--------- TCP segment ---------+ +-----------TCP segment -----------+ +---- TCP segment ---------+ +------------
1332 | * TCP | headers | *chunk | part-chunk | | part-chunk | *chunk | part-chunk | | part-chunk | 1*chunk | | 1*chunk ...
1333 | * ----- +---------+--------+------------+ +------------+--------+------------+ +------------+-------------+ +------------
1334 | *
1335 | * Notation:
1336 | * - headers HTTP headers of a request or response message.
1337 | * - part-chunk The front or rear part of a HTTP chunk.
1338 | * - *chunk Zero or more completed HTTP chunks of a HTTP message.
1339 | * - 1*chunk One or more completed HTTP chunks of a HTTP message.
1340 | * - de-chunked-data De-chunked HTTP body data based on one or more completed chunks.
1341 | * - 1*high-proto-pdu One or more high level protocol (on top of HTTP) PDUs.
1342 | * - HLProtos High Level Protocols like GRPC-Web.
1343 | *
1344 | * The headers and content_info of the req_res are allocated in file scope that
1345 | * helps to provide information for dissecting subsequent PDUs which only
1346 | * contains chunks without headers.
1347 | */
1348 | bool_Bool streaming_chunk_mode = false0;
1349 | bool_Bool begin_with_chunk = false0;
1350 | http_streaming_reassembly_data_t* streaming_reassembly_data = NULL((void*)0);
1351 |
1352 | http_req_res_t *curr = (http_req_res_t *)p_get_proto_data(wmem_file_scope(), pinfo, proto_http, HTTP_PROTO_DATA_REQRES0);
1353 | http_info_value_t *stat_info = NULL((void*)0);
1354 | http_req_res_private_data_t* prv_data = curr ? (http_req_res_private_data_t*)curr->private_data : NULL((void*)0);
1355 | http_req_res_private_data_t* tail_prv_data = NULL((void*)0);
1356 |
1357 | /* Determine the direction as in the TCP dissector, but don't call
1358 | * get_tcp_conversation_data because we don't want to create a new
1359 | * TCP stream if it doesn't exist (e.g., SSDP over UDP.)
1360 | */
1361 | int direction = cmp_address(&pinfo->src, &pinfo->dst);
1362 | /* if the addresses are equal, match the ports instead */
1363 | if (direction == 0) {
1364 | direction = (pinfo->srcport > pinfo->destport) ? 1 : -1;
1365 | }
1366 | if (direction >= 0) {
1367 | chunk_map = conv_data->chunk_offsets_fwd;
1368 | } else {
1369 | chunk_map = conv_data->chunk_offsets_rev;
1370 | }
1371 |
1372 | if (seq && chunk_map) {
1373 | chunk_offset = GPOINTER_TO_INT(wmem_map_lookup(chunk_map, GUINT_TO_POINTER(*seq)))((gint) (glong) (wmem_map_lookup(chunk_map, ((gpointer) (gulong ) (*seq)))));
1374 | /* Returns 0 when there is no entry in the map, as we want. */
1375 | }
1376 |
1377 | reported_length = tvb_reported_length_remaining(tvb, offset);
1378 | if (reported_length < 1) {
1379 | return -1;
1380 | }
1381 |
1382 | /* RFC 2616
1383 | * In the interest of robustness, servers SHOULD ignore any empty
1384 | * line(s) received where a Request-Line is expected. In other words, if
1385 | * the server is reading the protocol stream at the beginning of a
1386 | * message and receives a CRLF first, it should ignore the CRLF.
1387 | */
1388 | if (reported_length > 3) {
1389 | word = tvb_get_ntohs(tvb,offset);
1390 | if (word == 0x0d0a) {
1391 | leading_crlf = true1;
1392 | offset += 2;
1393 | }
1394 | }
1395 |
1396 | /*
1397 | * If we previously dissected an HTTP request in this conversation then
1398 | * we should be pretty sure that whatever we got in this TVB is
1399 | * actually HTTP (even if what we have here is part of a file being
1400 | * transferred over HTTP).
1401 | */
1402 | if (conv_data->req_res_tail)
1403 | have_seen_http = true1;
1404 |
1405 | /*
1406 | * If this is binary data then there's no point in doing all the string
1407 | * operations below: they'll just be slow on this data.
1408 | */
1409 | if (!g_ascii_isprint(tvb_get_uint8(tvb, offset))((g_ascii_table[(guchar) (tvb_get_uint8(tvb, offset))] & G_ASCII_PRINT ) != 0)) {
1410 | /*
1411 | * But, if we've seen some real HTTP then we're sure this is
1412 | * an HTTP conversation, and this is binary file data.
1413 | * Mark it as such.
1414 | */
1415 | if (have_seen_http) {
1416 | tvbuff_t *next_tvb;
1417 | int data_len;
1418 |
1419 | col_set_str(pinfo->cinfo, COL_PROTOCOL, proto_tag);
1420 | col_set_str(pinfo->cinfo, COL_INFO, "Continuation");
1421 | ti = proto_tree_add_item(tree, proto, tvb, offset, -1, ENC_NA0x00000000);
1422 | http_tree = proto_item_add_subtree(ti, ett_http);
1423 |
1424 | next_tvb = tvb_new_subset_remaining(tvb, orig_offset);
1425 | /* If orig_offset > 0, this isn't the first message
1426 | * dissected in this TCP segment, which means we had
1427 | * a Content-Length, but more data after that body.
1428 | */
1429 | if (orig_offset > 0) {
1430 | proto_tree_add_expert(http_tree, pinfo, &ei_http_excess_data, next_tvb, 0, tvb_captured_length(next_tvb));
1431 | }
1432 | /* Send it to Follow HTTP Stream and mark as file data */
1433 | if(have_tap_listener(http_follow_tap)) {
1434 | tap_queue_packet(http_follow_tap, pinfo, next_tvb);
1435 | }
1436 | data_len = tvb_captured_length(next_tvb);
1437 | proto_tree_add_bytes_format_value(http_tree, hf_http_file_data,
1438 | next_tvb, 0, data_len, NULL((void*)0), "%u byte%s", data_len, plurality(data_len, "", "s")((data_len) == 1 ? ("") : ("s")));
1439 | call_data_dissector(next_tvb, pinfo, http_tree);
1440 | }
1441 | return -1;
1442 | }
1443 |
1444 | /*
1445 | * Is this a request or response?
1446 | *
1447 | * Note that "tvb_find_line_end_length()" will return a value that
1448 | * is not longer than what's in the buffer, so the
1449 | * "tvb_get_ptr()" call won't throw an exception.
1450 | */
1451 | bool_Bool lind_end_found = tvb_find_line_end_length(tvb, offset,
1452 | tvb_ensure_captured_length_remaining(tvb, offset), &first_linelen , &next_offset);
1453 |
1454 | if (!lind_end_found) {
1455 | /* No complete line was found in this segment, do
1456 | * desegmentation if we're told to.
1457 | */
1458 | if (!req_resp_hdrs_do_reassembly(tvb, offset, pinfo,
1459 | http_desegment_headers, http_desegment_body, false0, &chunk_offset,
1460 | streaming_content_type_dissector_table, &handle)) {
1461 | /*
1462 | * More data needed for desegmentation.
1463 | */
1464 | return -1;
1465 | }
1466 | }
1467 |
1468 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited) && conv_data->req_res_tail && conv_data->req_res_tail->private_data) {
1469 | tail_prv_data = (http_req_res_private_data_t*) conv_data->req_res_tail->private_data;
1470 | }
1471 |
1472 | /* Check whether the first line is the beginning of a chunk. If it is the beginning
1473 | * of a chunk, the headers and at least one chunk of HTTP request or response should
1474 | * be dissected in the previous packets, and now we are processing subsequent chunks.
1475 | */
1476 | if (http_desegment_body && http_dechunk_body) {
1477 | begin_with_chunk = starts_with_chunk_size(tvb, offset, pinfo);
1478 |
1479 | if (begin_with_chunk &&
1480 | ((prv_data && ( /* This packet has been parsed */
1481 | /* and now we are in a HTTP request chunk stream */
1482 | (prv_data->req_fwd_flow == direction && prv_data->req_streaming_reassembly_data) ||
1483 | /* and now we are in a HTTP response chunk stream */
1484 | (prv_data->req_fwd_flow != direction && prv_data->res_streaming_reassembly_data)))
1485 | ||
1486 | (tail_prv_data && ( /* This packet has not been parsed and headers info in conv_data->req_res_tail */
1487 | /* and now we are in a HTTP request chunk stream */
1488 | (tail_prv_data->req_fwd_flow == direction && tail_prv_data->req_streaming_reassembly_data) ||
1489 | /* and now we are in a HTTP response chunk stream */
1490 | (tail_prv_data->req_fwd_flow != direction && tail_prv_data->res_streaming_reassembly_data)))))
1491 | {
1492 | streaming_chunk_mode = true1;
1493 | }
1494 | }
1495 |
1496 | /*
1497 | * Is the first line a request or response?
1498 | * Note that "tvb_find_line_end_length()" will return a value that
1499 | * is not longer than what's in the buffer, so the
1500 | * "tvb_get_ptr()" call won't throw an exception.
1501 | */
1502 | firstline = tvb_get_ptr(tvb, offset, first_linelen);
1503 | http_type = MEDIA_CONTAINER_HTTP_OTHERS; /* type not known yet */
1504 | is_request_or_reply = is_http_request_or_reply(pinfo, (const char *)firstline,
1505 | first_linelen, &http_type, NULL((void*)0), conv_data);
1506 | if (is_request_or_reply || streaming_chunk_mode) {
1507 | bool_Bool try_desegment_body;
1508 |
1509 | if (streaming_chunk_mode && begin_with_chunk) {
1510 | col_set_str(pinfo->cinfo, COL_INFO, "Chunk Stream ");
1511 | } else {
1512 | /*
1513 | * Yes, it's a request or response.
1514 | * Put the first line from the buffer into the summary
1515 | * (but leave out the line terminator).
1516 | */
1517 | col_add_fstr(pinfo->cinfo, COL_INFO, "%s ", format_text(pinfo->pool, (char*)firstline, first_linelen));
1518 | }
1519 |
1520 | /*
1521 | * Do header desegmentation if we've been told to,
1522 | * and do body desegmentation if we've been told to and
1523 | * we find a Content-Length header in requests.
1524 | *
1525 | * The following cases (from RFC 7230, Section 3.3) never have a
1526 | * response body, so do not attempt to desegment the body for:
1527 | * * Responses to HEAD requests.
1528 | * * 2xx responses to CONNECT requests.
1529 | * * 1xx, 204 No Content, 304 Not Modified responses.
1530 | *
1531 | * Additionally if we are at the end of stream, no more segments
1532 | * will be added so disable body segmentation too in that case.
1533 | */
1534 | try_desegment_body = (http_desegment_body && !end_of_stream);
1535 | if (try_desegment_body && http_type == MEDIA_CONTAINER_HTTP_RESPONSE && !streaming_chunk_mode) {
1536 | /*
1537 | * The response_code is not yet set, so extract
1538 | * the response code from the current line.
1539 | */
1540 | int response_code = parse_http_status_code(firstline, firstline + first_linelen);
1541 | /*
1542 | * On a second pass, we should have already associated
1543 | * the response with the request. On a first sequential
1544 | * pass, we haven't done so yet (as we don't know if we
1545 | * need more data), so get the request method from the
1546 | * most recent request, if it exists.
1547 | */
1548 | char* request_method = NULL((void*)0);
1549 | if (curr) {
1550 | request_method = curr->request_method;
1551 | } else if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited) && conv_data->req_res_tail) {
1552 | request_method = conv_data->req_res_tail->request_method;
1553 | }
1554 | if ((g_strcmp0(request_method, "HEAD") == 0 ||
1555 | (response_code / 100 == 2 &&
1556 | (g_strcmp0(request_method, "CONNECT") == 0 ||
1557 | g_strcmp0(request_method, "SSTP_DUPLEX_POST") == 0)) ||
1558 | response_code / 100 == 1 ||
1559 | response_code == 204 ||
1560 | response_code == 304)) {
1561 | /* No response body is present. */
1562 | try_desegment_body = false0;
1563 | }
1564 | }
1565 | if (!req_resp_hdrs_do_reassembly(tvb, offset, pinfo,
1566 | http_desegment_headers, try_desegment_body, http_type == MEDIA_CONTAINER_HTTP_RESPONSE, &chunk_offset,
1567 | streaming_content_type_dissector_table, &handle)) {
1568 | /*
1569 | * More data needed for desegmentation.
1570 | */
1571 | if (seq && chunk_map && chunk_offset) {
1572 | wmem_map_insert(chunk_map, GUINT_TO_POINTER(*seq)((gpointer) (gulong) (*seq)), GINT_TO_POINTER(chunk_offset)((gpointer) (glong) (chunk_offset)));
1573 | }
1574 | return -1;
1575 | }
1576 |
1577 | if (handle && http_desegment_body && http_dechunk_body) {
1578 | /* This handle is set because there is a header 'Transfer-Encoding: chunked', and
1579 | * a streaming mode reassembly supported subdissector is found according to the
1580 | * header of Content-Type.
1581 | */
1582 | streaming_chunk_mode = true1;
1583 | }
1584 | } else if (have_seen_http) {
1585 | /*
1586 | * If we know this is HTTP then call it continuation.
1587 | */
1588 | /* If orig_offset > 0, this isn't the first message dissected
1589 | * in this segment, which means we had a Content-Length, but
1590 | * more data after the body. If this isn't a request or reply,
1591 | * that's bogus, and probably means the Content-Length was
1592 | * wrong.
1593 | */
1594 | if (orig_offset > 0) {
1595 | excess_data = true1;
1596 | }
1597 | col_set_str(pinfo->cinfo, COL_INFO, "Continuation");
1598 | }
1599 |
1600 | if (is_request_or_reply || have_seen_http || streaming_chunk_mode) {
1601 | /*
1602 | * Now set COL_PROTOCOL and create the http tree for the
1603 | * cases where we set COL_INFO above.
1604 | */
1605 | col_set_str(pinfo->cinfo, COL_PROTOCOL, proto_tag);
1606 | ti = proto_tree_add_item(tree, proto, tvb, offset, -1, ENC_NA0x00000000);
1607 | http_tree = proto_item_add_subtree(ti, ett_http);
1608 |
1609 | if (leading_crlf) {
1610 | proto_tree_add_expert(http_tree, pinfo, &ei_http_leading_crlf, tvb, offset-2, 2);
1611 | }
1612 | if (excess_data) {
1613 | proto_tree_add_expert(http_tree, pinfo, &ei_http_excess_data, tvb, offset, tvb_captured_length_remaining(tvb, offset));
1614 | }
1615 | }
1616 |
1617 | is_tls = proto_is_frame_protocol(pinfo->layers, "tls");
1618 |
1619 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited) && begin_with_chunk
1620 | && streaming_chunk_mode && conv_data->req_res_tail) {
1621 | /* point this packet beginning with a chunk to req_res info created in previous packet. */
1622 | curr = conv_data->req_res_tail;
1623 | prv_data = (http_req_res_private_data_t*)curr->private_data;
1624 | p_set_proto_data(wmem_file_scope(), pinfo, proto_http, HTTP_PROTO_DATA_REQRES0, curr);
1625 | }
1626 |
1627 | if (prv_data) {
1628 | if (prv_data->req_fwd_flow == direction && prv_data->req_streaming_reassembly_data) {
1629 | /* in request flow */
1630 | streaming_reassembly_data = prv_data->req_streaming_reassembly_data;
1631 | } else if (prv_data->req_fwd_flow != direction && prv_data->res_streaming_reassembly_data) {
1632 | /* in response flow */
1633 | streaming_reassembly_data = prv_data->res_streaming_reassembly_data;
1634 | }
1635 |
1636 | if (streaming_reassembly_data) {
1637 | streaming_chunk_mode = true1;
1638 | headers = streaming_reassembly_data->main_headers;
1639 | handle = streaming_reassembly_data->streaming_handle;
1640 | content_info = streaming_reassembly_data->content_info;
1641 | header_value_map = (wmem_map_t*) content_info->data;
1642 | header_value_map_allocator = wmem_file_scope();
1643 | }
1644 | }
1645 |
1646 | // Ensure headers is valid before the `goto dissecting_body` below.
1647 | if (headers == NULL((void*)0)) {
1648 | DISSECTOR_ASSERT_HINT(!PINFO_FD_VISITED(pinfo) || (PINFO_FD_VISITED(pinfo) && !streaming_chunk_mode),((void) ((!((pinfo)->fd->visited) || (((pinfo)->fd-> visited) && !streaming_chunk_mode)) ? (void)0 : (proto_report_dissector_bug ("%s:%u: failed assertion \"%s\" (%s)", "epan/dissectors/packet-http.c" , 1649, "!((pinfo)->fd->visited) || (((pinfo)->fd->visited) && !streaming_chunk_mode)" , "The headers variable should not be NULL if it is in streaming mode during a non first scan." ))))
1649 | "The headers variable should not be NULL if it is in streaming mode during a non first scan.")((void) ((!((pinfo)->fd->visited) || (((pinfo)->fd-> visited) && !streaming_chunk_mode)) ? (void)0 : (proto_report_dissector_bug ("%s:%u: failed assertion \"%s\" (%s)", "epan/dissectors/packet-http.c" , 1649, "!((pinfo)->fd->visited) || (((pinfo)->fd->visited) && !streaming_chunk_mode)" , "The headers variable should not be NULL if it is in streaming mode during a non first scan." ))));
1650 | DISSECTOR_ASSERT_HINT(header_value_map == NULL, "The header_value_map variable should be NULL while headers is NULL.")((void) ((header_value_map == ((void*)0)) ? (void)0 : (proto_report_dissector_bug ("%s:%u: failed assertion \"%s\" (%s)", "epan/dissectors/packet-http.c" , 1650, "header_value_map == ((void*)0)", "The header_value_map variable should be NULL while headers is NULL." ))));
1651 |
1652 | headers = wmem_new0((streaming_chunk_mode ? wmem_file_scope() : pinfo->pool), headers_t)((headers_t*)wmem_alloc0(((streaming_chunk_mode ? wmem_file_scope () : pinfo->pool)), sizeof(headers_t)));
1653 | if (streaming_chunk_mode) {
1654 | header_value_map_allocator = wmem_file_scope();
1655 | header_value_map = wmem_map_new(header_value_map_allocator, g_str_hash, g_str_equal);
1656 | }
1657 | }
1658 |
1659 | if (streaming_chunk_mode && begin_with_chunk) {
1660 | datalen = reported_length;
1661 | goto dissecting_body;
1662 | }
1663 |
1664 | stat_info = wmem_new(pinfo->pool, http_info_value_t)((http_info_value_t*)wmem_alloc((pinfo->pool), sizeof(http_info_value_t )));
1665 | stat_info->framenum = pinfo->num;
1666 | stat_info->response_code = 0;
1667 | stat_info->request_method = NULL((void*)0);
1668 | stat_info->request_uri = NULL((void*)0);
1669 | stat_info->referer_uri = NULL((void*)0);
1670 | stat_info->http_host = NULL((void*)0);
1671 | stat_info->full_uri = NULL((void*)0);
1672 | stat_info->location_target = NULL((void*)0);
1673 | stat_info->location_base_uri = NULL((void*)0);
1674 | p_set_proto_data(pinfo->pool, pinfo, proto_http, HTTP_PROTO_DATA_INFO1, (void *)stat_info);
1675 |
1676 | /*
1677 | * Process the packet data, a line at a time.
1678 | */
1679 | http_type = MEDIA_CONTAINER_HTTP_OTHERS; /* type not known yet */
1680 |
1681 | saw_req_resp_or_header = false0; /* haven't seen anything yet */
1682 | while (tvb_offset_exists(tvb, offset)) {
1683 | /*
1684 | * Find the end of the line.
1685 | * XXX - what if we don't find it because the packet
1686 | * is cut short by a snapshot length or the header is
1687 | * split across TCP segments? How much dissection should
1688 | * we do on it?
1689 | */
1690 | bool_Bool linelen_found = tvb_find_line_end_length(tvb, offset,
1691 | tvb_ensure_captured_length_remaining(tvb, offset), &linelen ,&next_offset);
1692 | if (!linelen_found)
1693 | return -1;
1694 |
1695 | /*
1696 | * Get a buffer that refers to the line.
1697 | *
1698 | * Note that "tvb_find_line_end_length()" will return a value that
1699 | * is not longer than what's in the buffer, so the
1700 | * "tvb_get_ptr()" call won't throw an exception.
1701 | */
1702 | line = tvb_get_ptr(tvb, offset, linelen);
1703 | lineend = line + linelen;
1704 | colon_offset = -1;
1705 |
1706 | /*
1707 | * OK, does it look like an HTTP request or response?
1708 | */
1709 | reqresp_dissector = NULL((void*)0);
1710 | is_request_or_reply =
1711 | is_http_request_or_reply(pinfo, (const char *)line,
1712 | linelen, &http_type, &reqresp_dissector, conv_data);
1713 | if (is_request_or_reply)
1714 | goto is_http;
1715 |
1716 | /*
1717 | * No. Does it look like a blank line (as would appear
1718 | * at the end of an HTTP request)?
1719 | */
1720 | if (linelen == 0)
1721 | goto is_http; /* Yes. */
1722 |
1723 | /*
1724 | * No. Does it look like a header?
1725 | */
1726 | colon_offset = offset;
1727 |
1728 | linep = (const unsigned char *)memchr(line, ':', linelen);
1729 | if (linep) {
1730 | /*
1731 | * Colon found, assume it is a header if we've seen a
1732 | * valid line before. Check a little more if not.
1733 | */
1734 | if (saw_req_resp_or_header || valid_header_name(line, (int)(linep - line))) {
1735 | colon_offset += (int)(linep - line);
1736 | if (http_check_ascii_headers) {
1737 | unsigned i;
1738 | for (i = 0; i < linelen; i++) {
1739 | if (line[i] & 0x80) {
1740 | /*
1741 | * Non-ASCII! Return -2 for invalid
1742 | * HTTP, distinct from -1 for possible
1743 | * reassembly required.
1744 | */
1745 | return -2;
1746 | }
1747 | }
1748 | }
1749 | goto is_http;
1750 | }
1751 | }
1752 |
1753 | /*
1754 | * We haven't seen the colon yet.
1755 | *
1756 | * If we've already seen an HTTP request or response
1757 | * line, or a header line, and we're at the end of
1758 | * the tvbuff, we assume this is an incomplete header
1759 | * line. (We quit this loop after seeing a blank line,
1760 | * so if we've seen a request or response line, or a
1761 | * header line, this is probably more of the request
1762 | * or response we're presumably seeing. There is some
1763 | * risk of false positives, but the same applies for
1764 | * full request or response lines or header lines,
1765 | * although that's less likely.)
1766 | *
1767 | * We throw an exception in that case, by checking for
1768 | * the existence of the next byte after the last one
1769 | * in the line. If it exists, "tvb_ensure_bytes_exist()"
1770 | * throws no exception, and we fall through to the
1771 | * "not HTTP" case. If it doesn't exist,
1772 | * "tvb_ensure_bytes_exist()" will throw the appropriate
1773 | * exception.
1774 | */
1775 | if (saw_req_resp_or_header)
1776 | tvb_ensure_bytes_exist(tvb, offset, linelen + 1);
1777 |
1778 | /*
1779 | * We don't consider this part of an HTTP request or
1780 | * reply, so we don't display it.
1781 | * (Yeah, that means we don't display, say, a text/http
1782 | * page, but you can get that from the data pane.)
1783 | */
1784 | break;
1785 |
1786 | is_http:
1787 | if ((tree) && (http_tree == NULL((void*)0))) {
1788 | ti = proto_tree_add_item(tree, proto, tvb, orig_offset, -1, ENC_NA0x00000000);
1789 | http_tree = proto_item_add_subtree(ti, ett_http);
1790 | if (leading_crlf) {
1791 | proto_tree_add_expert(http_tree, pinfo, &ei_http_leading_crlf, tvb, orig_offset-2, 2);
1792 | }
1793 | }
1794 |
1795 | if (first_loop && !is_tls && pinfo->ptype == PT_TCP &&
1796 | (pinfo->srcport == 443 || pinfo->destport == 443)) {
1797 | expert_add_info(pinfo, ti, &ei_http_tls_port);
1798 | }
1799 |
1800 | first_loop = false0;
1801 |
1802 | /*
1803 | * Process this line.
1804 | */
1805 |
1806 | if (linelen == 0) {
1807 | /*
1808 | * This is a blank line, which means that
1809 | * whatever follows it isn't part of this
1810 | * request or reply.
1811 | */
1812 | proto_tree_add_format_text(http_tree, tvb, offset, next_offset - offset);
1813 | offset = next_offset;
1814 | break;
1815 | }
1816 |
1817 | /*
1818 | * Not a blank line - either a request, a reply, or a header
1819 | * line.
1820 | */
1821 | saw_req_resp_or_header = true1;
1822 | if (is_request_or_reply) {
1823 | char *text = tvb_format_text(pinfo->pool, tvb, offset, next_offset - offset);
1824 |
1825 | req_tree = proto_tree_add_subtree(http_tree, tvb,
1826 | offset, next_offset - offset, ett_http_request, &hdr_item, text);
1827 |
1828 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
1829 | if (header_value_map_allocator != wmem_file_scope()) {
1830 | /*
1831 | * If we already have a header_value_map allocated
1832 | * with pinfo->pool scope, that means we saw a
1833 | * field-line followed by a start line in the same
1834 | * message; that's bogus, so we shouldn't need to
1835 | * worry about passing the previous "headers" to a
1836 | * next dissector, so it's okay to drop the map.
1837 | */
1838 | header_value_map_allocator = wmem_file_scope();
1839 | header_value_map = wmem_map_new(header_value_map_allocator, g_str_hash, g_str_equal);
1840 | }
1841 | if (http_type == MEDIA_CONTAINER_HTTP_REQUEST) {
1842 | curr = push_req(conv_data, pinfo);
1843 | curr->request_method = wmem_strdup(wmem_file_scope(), stat_info->request_method);
1844 | prv_data = curr->private_data;
1845 | prv_data->req_fwd_flow = direction;
1846 | prv_data->request_headers = header_value_map;
1847 | } else if (http_type == MEDIA_CONTAINER_HTTP_RESPONSE) {
1848 | curr = push_res(conv_data, pinfo);
1849 | prv_data = curr->private_data;
1850 | prv_data->req_fwd_flow = -direction;
1851 | prv_data->response_headers = header_value_map;
1852 | }
1853 | }
1854 | if (reqresp_dissector) {
1855 | reqresp_dissector(pinfo, tvb, req_tree, offset, line,
1856 | lineend, conv_data, curr);
1857 | }
1858 | } else {
1859 | /*
1860 | * Header.
1861 | */
1862 | if (header_value_map == NULL((void*)0) && conv_data->req_res_tail) {
1863 | prv_data = (http_req_res_private_data_t*)conv_data->req_res_tail->private_data;
1864 | if (prv_data) {
1865 | header_value_map_allocator = wmem_file_scope();
1866 | if (prv_data->req_fwd_flow == direction) {
1867 | header_value_map = prv_data->request_headers;
1868 | } else {
1869 | header_value_map = prv_data->response_headers;
1870 | }
1871 | }
1872 | }
1873 | if (header_value_map == NULL((void*)0)) {
1874 | /*
1875 | * We are seeing a header but have not tracked request or response, so we don't know
1876 | * direction of this header, so not going to keep track of it
1877 | */
1878 | header_value_map_allocator = pinfo->pool;
1879 | header_value_map = wmem_map_new(header_value_map_allocator, g_str_hash, g_str_equal);
1880 | }
1881 | bool_Bool good_header = process_header(tvb, offset, next_offset, line, linelen,
1882 | colon_offset, pinfo, http_tree, headers, conv_data, http_type, header_value_map,
1883 | header_value_map_allocator, streaming_chunk_mode);
1884 | if (http_check_ascii_headers && !good_header) {
1885 | /*
1886 | * Line is not a good HTTP header.
1887 | * Return -2 to mark as invalid HTTP;
1888 | * this is distinct from returning -1 when
1889 | * it may be HTTP but in need of reassembly.
1890 | */
1891 | return -2;
1892 | }
1893 | }
1894 | offset = next_offset;
1895 | }
1896 | if (stat_info->http_host && stat_info->request_uri) {
1897 | char *uri;
1898 |
1899 | if ((g_ascii_strncasecmp(stat_info->request_uri, "http://", 7) == 0) ||
1900 | (g_ascii_strncasecmp(stat_info->request_uri, "https://", 8) == 0) ||
1901 | (g_ascii_strncasecmp(stat_info->request_method, "CONNECT", 7) == 0)) {
1902 | uri = wmem_strdup(pinfo->pool, stat_info->request_uri);
1903 | }
1904 | else {
1905 | uri = wmem_strdup_printf(pinfo->pool, "%s://%s%s",
1906 | is_tls ? "https" : "http",
1907 | g_strstrip(wmem_strdup(pinfo->pool, stat_info->http_host))g_strchomp (g_strchug (wmem_strdup(pinfo->pool, stat_info-> http_host))), stat_info->request_uri);
1908 | }
1909 | stat_info->full_uri = wmem_strdup(pinfo->pool, uri);
1910 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited) && curr) {
1911 | curr->full_uri = wmem_strdup(wmem_file_scope(), uri);
1912 | }
1913 | }
1914 | else {
1915 | /* If the request has a range, this is, or potentially is, asynchronous I/O thus
1916 | * full_uri must be reinitialized because it is set to that of the last request. */
1917 | if (curr && curr->req_has_range)
1918 | curr->full_uri = NULL((void*)0);
1919 | }
1920 | if (tree) {
1921 | proto_item *pi;
1922 |
1923 | switch (http_type) {
1924 |
1925 | case MEDIA_CONTAINER_HTTP_NOTIFICATION:
1926 | hidden_item = proto_tree_add_boolean(http_tree,
1927 | hf_http_notification, tvb, 0, 0, 1);
1928 | proto_item_set_hidden(hidden_item);
1929 | break;
1930 |
1931 | case MEDIA_CONTAINER_HTTP_RESPONSE:
1932 | hidden_item = proto_tree_add_boolean(http_tree,
1933 | hf_http_response, tvb, 0, 0, 1);
1934 | proto_item_set_hidden(hidden_item);
1935 |
1936 | match_trans_t *match_trans = NULL((void*)0);
1937 |
1938 | if (curr && curr->response_code == 206 && curr->resp_has_range) {
1939 | /* The conv_data->matches_table is only used for GET requests with ranges and
1940 | * response_codes of 206 (Partial Content). (Note: only GETs use ranges.)
1941 | */
1942 | match_trans = (match_trans_t *)wmem_map_lookup(conv_data->matches_table,
1943 | GUINT_TO_POINTER(pinfo->num)((gpointer) (gulong) (pinfo->num)));
1944 | if (match_trans) {
1945 | pi = proto_tree_add_uint(http_tree, hf_http_request_in, tvb, 0, 0,
1946 | match_trans->req_frame);
1947 | proto_item_set_generated(pi);
1948 |
1949 | pi = proto_tree_add_time(http_tree, hf_http_time, tvb, 0, 0,
1950 | &match_trans->delta_time);
1951 | proto_item_set_generated(pi);
1952 |
1953 | pi = proto_tree_add_string(http_tree, hf_http_request_uri, tvb, 0, 0,
1954 | match_trans->request_uri);
1955 | proto_item_set_generated(pi);
1956 | {
1957 | char *uri;
1958 | uri = wmem_strdup_printf(pinfo->pool, "%s://%s%s",
1959 | is_tls ? "https" : "http",
1960 | g_strstrip(wmem_strdup(pinfo->pool, match_trans->http_host))g_strchomp (g_strchug (wmem_strdup(pinfo->pool, match_trans ->http_host))), match_trans->request_uri);
1961 |
1962 | pi = proto_tree_add_string(http_tree, hf_http_request_full_uri, tvb, 0, 0,
1963 | uri);
1964 | proto_item_set_url(pi);
1965 | proto_item_set_generated(pi);
1966 | }
1967 | }
1968 | }
1969 |
1970 | /* If responses don't have a range, the I/O is synchronous in which case a request is
1971 | * matched with the following response. If a request or response is missing from the
1972 | * capture file, correct matching resumes at the next request. */
1973 | if(!match_trans
1974 | && curr
1975 | && !curr->resp_has_range
1976 | && curr->req_framenum) {
1977 | pi = proto_tree_add_uint(http_tree, hf_http_request_in, tvb, 0, 0, curr->req_framenum);
1978 | proto_item_set_generated(pi);
1979 |
1980 | if (! nstime_is_unset(&(curr->req_ts))) {
1981 | nstime_t delta;
1982 |
1983 | nstime_delta(&delta, &pinfo->abs_ts, &(curr->req_ts));
1984 | pi = proto_tree_add_time(http_tree, hf_http_time, tvb, 0, 0, &delta);
1985 | proto_item_set_generated(pi);
1986 | }
1987 | if (curr->request_uri) {
1988 | pi = proto_tree_add_string(http_tree, hf_http_request_uri, tvb, 0, 0,
1989 | curr->request_uri);
1990 | proto_item_set_generated(pi);
1991 | }
1992 | if (curr->full_uri) {
1993 | pi = proto_tree_add_string(http_tree, hf_http_request_full_uri, tvb, 0, 0,
1994 | curr->full_uri);
1995 | proto_item_set_url(pi);
1996 | proto_item_set_generated(pi);
1997 | }
1998 | }
1999 | break;
2000 | case MEDIA_CONTAINER_HTTP_REQUEST:
2001 | {
2002 | int size = wmem_map_size(conv_data->matches_table);
2003 |
2004 | hidden_item = proto_tree_add_boolean(http_tree, hf_http_request, tvb, 0, 0, 1);
2005 | proto_item_set_hidden(hidden_item);
2006 |
2007 | match_trans = NULL((void*)0);
2008 | if (curr) {
2009 | if (size > 0 && curr->req_has_range) {
2010 | match_trans = (match_trans_t *)wmem_map_lookup(conv_data->matches_table,
2011 | GUINT_TO_POINTER(pinfo->num)((gpointer) (gulong) (pinfo->num)));
2012 | if (match_trans) {
2013 | pi = proto_tree_add_uint(http_tree, hf_http_response_in,
2014 | tvb, 0, 0, match_trans->resp_frame);
2015 | proto_item_set_generated(pi);
2016 | }
2017 | }
2018 | else {
2019 | if(!match_trans
2020 | && !curr->resp_has_range
2021 | && curr->res_framenum) {
2022 | pi = proto_tree_add_uint(http_tree, hf_http_response_in, tvb, 0, 0, curr->res_framenum);
2023 | proto_item_set_generated(pi);
2024 |
2025 | }
2026 | }
2027 |
2028 | if (curr->full_uri) {
2029 | pi = proto_tree_add_string(http_tree, hf_http_request_full_uri, tvb, 0, 0,
2030 | curr->full_uri);
2031 | proto_item_set_url(pi);
2032 | proto_item_set_generated(pi);
2033 | }
2034 | else if (stat_info->full_uri){
2035 | pi = proto_tree_add_string(http_tree, hf_http_request_full_uri, tvb, 0, 0,
2036 | stat_info->full_uri);
2037 | proto_item_set_url(pi);
2038 | proto_item_set_generated(pi);
2039 | }
2040 | }
2041 | }
2042 | break;
2043 |
2044 | case MEDIA_CONTAINER_HTTP_OTHERS:
2045 | default:
2046 | break;
2047 | }
2048 | }
2049 |
2050 | /* Give the follow tap what we've currently dissected */
2051 | if(have_tap_listener(http_follow_tap)) {
2052 | tap_queue_packet(http_follow_tap, pinfo, tvb_new_subset_length(tvb, orig_offset, offset-orig_offset));
2053 | }
2054 |
2055 | reported_datalen = tvb_reported_length_remaining(tvb, offset);
2056 | datalen = tvb_captured_length_remaining(tvb, offset);
2057 |
2058 | /*
2059 | * If a content length was supplied, the amount of data to be
2060 | * processed as HTTP payload is the minimum of the content
2061 | * length and the amount of data remaining in the frame.
2062 | *
2063 | * If a message is received with both a Transfer-Encoding
2064 | * header field and a Content-Length header field, the latter
2065 | * MUST be ignored.
2066 | *
2067 | * If no content length was supplied (or if a bad content length
2068 | * was supplied), the amount of data to be processed is the amount
2069 | * of data remaining in the frame.
2070 | *
2071 | * If there was no Content-Length entity header, we should
2072 | * accumulate all data until the end of the connection.
2073 | * That'd require that the TCP dissector call subdissectors
2074 | * for all frames with FIN, even if they contain no data,
2075 | * which would require subdissectors to deal intelligently
2076 | * with empty segments.
2077 | *
2078 | * According to RFC 2616, however, 1xx responses, 204 responses,
2079 | * and 304 responses MUST NOT include a message body; if no
2080 | * content length is specified for them, we don't attempt to
2081 | * dissect the body.
2082 | *
2083 | * XXX - it says the same about responses to HEAD requests;
2084 | * unless there's a way to determine from the response
2085 | * whether it's a response to a HEAD request, we have to
2086 | * keep information about the request and associate that with
2087 | * the response in order to handle that.
2088 | */
2089 | if (headers->have_content_length &&
2090 | headers->transfer_encoding == HTTP_TE_NONE) {
2091 | if (datalen > headers->content_length)
2092 | datalen = (int)headers->content_length;
2093 |
2094 | /*
2095 | * XXX - limit the reported length in the tvbuff we'll
2096 | * hand to a subdissector to be no greater than the
2097 | * content length.
2098 | *
2099 | * We really need both unreassembled and "how long it'd
2100 | * be if it were reassembled" lengths for tvbuffs, so
2101 | * that we throw the appropriate exceptions for
2102 | * "not enough data captured" (running past the length),
2103 | * "packet needed reassembly" (within the length but
2104 | * running past the unreassembled length), and
2105 | * "packet is malformed" (running past the reassembled
2106 | * length).
2107 | */
2108 | if (reported_datalen > headers->content_length)
2109 | reported_datalen = (int)headers->content_length;
2110 | } else {
2111 | switch (http_type) {
2112 |
2113 | case MEDIA_CONTAINER_HTTP_REQUEST:
2114 | /*
2115 | * Requests have no content if there's no
2116 | * Content-Length header and no Transfer-Encoding
2117 | * header.
2118 | */
2119 | if (headers->transfer_encoding == HTTP_TE_NONE)
2120 | datalen = 0;
2121 | else
2122 | reported_datalen = -1;
2123 | break;
2124 |
2125 | case MEDIA_CONTAINER_HTTP_RESPONSE:
2126 | if ((stat_info->response_code/100) == 1 ||
2127 | stat_info->response_code == 204 ||
2128 | stat_info->response_code == 304)
2129 | datalen = 0; /* no content! */
2130 | else {
2131 | /*
2132 | * XXX - responses to HEAD requests,
2133 | * and possibly other responses,
2134 | * "MUST NOT" include a
2135 | * message-body.
2136 | */
2137 | reported_datalen = -1;
2138 | }
2139 | break;
2140 |
2141 | default:
2142 | /*
2143 | * XXX - what about MEDIA_CONTAINER_HTTP_NOTIFICATION?
2144 | */
2145 | reported_datalen = -1;
2146 | break;
2147 | }
2148 | }
2149 |
2150 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited) && streaming_chunk_mode && streaming_reassembly_data == NULL((void*)0)) {
2151 | DISSECTOR_ASSERT(!begin_with_chunk && handle && http_dechunk_body && http_desegment_body((void) ((!begin_with_chunk && handle && http_dechunk_body && http_desegment_body && headers->content_type && header_value_map) ? (void)0 : (proto_report_dissector_bug ("%s:%u: failed assertion \"%s\"", "epan/dissectors/packet-http.c" , 2152, "!begin_with_chunk && handle && http_dechunk_body && http_desegment_body && headers->content_type && header_value_map" ))))
2152 | && headers->content_type && header_value_map)((void) ((!begin_with_chunk && handle && http_dechunk_body && http_desegment_body && headers->content_type && header_value_map) ? (void)0 : (proto_report_dissector_bug ("%s:%u: failed assertion \"%s\"", "epan/dissectors/packet-http.c" , 2152, "!begin_with_chunk && handle && http_dechunk_body && http_desegment_body && headers->content_type && header_value_map" ))));
2153 |
2154 | content_info = wmem_new0(wmem_file_scope(), media_content_info_t)((media_content_info_t*)wmem_alloc0((wmem_file_scope()), sizeof (media_content_info_t)));
2155 | content_info->media_str = headers->content_type_parameters;
2156 | content_info->type = http_type;
2157 | content_info->data = header_value_map;
2158 |
2159 | streaming_reassembly_data = wmem_new0(wmem_file_scope(), http_streaming_reassembly_data_t)((http_streaming_reassembly_data_t*)wmem_alloc0((wmem_file_scope ()), sizeof(http_streaming_reassembly_data_t)));
2160 | streaming_reassembly_data->streaming_handle = handle;
2161 | streaming_reassembly_data->streaming_reassembly_info = streaming_reassembly_info_new();
2162 | streaming_reassembly_data->content_info = content_info;
2163 | streaming_reassembly_data->main_headers = headers;
2164 |
2165 | if (prv_data->req_fwd_flow == direction) {
2166 | prv_data->req_streaming_reassembly_data = streaming_reassembly_data;
2167 | } else {
2168 | prv_data->res_streaming_reassembly_data = streaming_reassembly_data;
2169 | }
2170 | }
2171 |
2172 | if (content_info == NULL((void*)0)) {
2173 | content_info = wmem_new0(pinfo->pool, media_content_info_t)((media_content_info_t*)wmem_alloc0((pinfo->pool), sizeof( media_content_info_t)));
2174 | content_info->media_str = headers->content_type_parameters;
2175 | content_info->type = http_type;
2176 | if (header_value_map == NULL((void*)0)) {
2177 | header_value_map = wmem_map_new(pinfo->pool, g_str_hash, g_str_equal);
2178 | }
2179 | content_info->data = header_value_map;
2180 | }
2181 |
2182 | dissecting_body:
2183 |
2184 | if (datalen > 0) {
2185 | /*
2186 | * There's stuff left over; process it.
2187 | */
2188 | tvbuff_t *next_tvb;
2189 | unsigned chunked_datalen = 0;
2190 | int data_len;
2191 |
2192 | /*
2193 | * Create a tvbuff for the payload.
2194 | *
2195 | * The amount of data to be processed that's
2196 | * available in the tvbuff is "datalen", which
2197 | * is the minimum of the amount of data left in
2198 | * the tvbuff and any specified content length.
2199 | *
2200 | * The amount of data to be processed that's in
2201 | * this frame, regardless of whether it was
2202 | * captured or not, is "reported_datalen",
2203 | * which, if no content length was specified,
2204 | * is -1, i.e. "to the end of the frame.
2205 | */
2206 | if (reported_datalen == -1) {
2207 | next_tvb = tvb_new_subset_remaining(tvb, offset);
2208 | } else {
2209 | next_tvb = tvb_new_subset_length(tvb, offset, reported_datalen);
2210 | }
2211 |
2212 | /*
2213 | * Handle *transfer* encodings.
2214 | */
2215 | if (headers->transfer_encoding_chunked) {
2216 | if (!http_dechunk_body) {
2217 | /* Chunking disabled, cannot dissect further. */
2218 | /* XXX: Should this be sent to the follow tap? */
2219 | call_data_dissector(next_tvb, pinfo, http_tree);
2220 | goto body_dissected;
2221 | }
2222 |
2223 | chunked_datalen = chunked_encoding_dissector(
2224 | &next_tvb, pinfo, http_tree, 0);
2225 |
2226 | if (chunked_datalen == 0) {
2227 | /*
2228 | * The chunks weren't reassembled,
2229 | * or there was a single zero
2230 | * length chunk.
2231 | */
2232 | goto body_dissected;
2233 | } else {
2234 | /*
2235 | * Add a new data source for the
2236 | * de-chunked data.
2237 | */
2238 | add_new_data_source(pinfo, next_tvb,
2239 | "De-chunked entity body");
2240 | /* chunked-body might be smaller than
2241 | * datalen. */
2242 | datalen = chunked_datalen;
2243 | }
2244 | }
2245 | /* Handle other transfer codings after de-chunking. */
2246 | switch (headers->transfer_encoding) {
2247 | case HTTP_TE_COMPRESS:
2248 | case HTTP_TE_DEFLATE:
2249 | case HTTP_TE_GZIP:
2250 | /*
2251 | * We currently can't handle, for example, "gzip",
2252 | * "compress", or "deflate" as *transfer* encodings;
2253 | * just handle them as data for now.
2254 | * XXX: Should this be sent to the follow tap?
2255 | */
2256 | call_data_dissector(next_tvb, pinfo, http_tree);
2257 | goto body_dissected;
2258 | default:
2259 | /* Nothing to do for "identity" or when header is
2260 | * missing or invalid. */
2261 | break;
2262 | }
2263 | /*
2264 | * At this point, any chunked *transfer* coding has been removed
2265 | * (the entity body has been dechunked) so it can be presented
2266 | * for the following operation (*content* encoding), or it has
2267 | * been handed off to the data dissector.
2268 | *
2269 | * Handle *content* encodings other than "identity" (which
2270 | * shouldn't appear in a Content-Encoding header, but
2271 | * we handle it in any case).
2272 | */
2273 | if (headers->content_encoding != NULL((void*)0) &&
2274 | g_ascii_strcasecmp(headers->content_encoding, "identity") != 0) {
2275 | /*
2276 | * We currently don't handle, for example, "compress";
2277 | * just handle them as data for now.
2278 | *
2279 | * After July 7, 2004 the LZW patent expired, so
2280 | * support could be added. However, I don't think
2281 | * that anybody ever really implemented "compress",
2282 | * due to the aforementioned patent.
2283 | */
2284 | tvbuff_t *uncomp_tvb = NULL((void*)0);
2285 | proto_item *e_ti = NULL((void*)0);
2286 | proto_tree *e_tree = NULL((void*)0);
2287 |
2288 | #if defined(HAVE_ZLIB1) || defined(HAVE_ZLIBNG)
2289 | if (http_decompress_body &&
2290 | (g_ascii_strcasecmp(headers->content_encoding, "gzip") == 0 ||
2291 | g_ascii_strcasecmp(headers->content_encoding, "deflate") == 0 ||
2292 | g_ascii_strcasecmp(headers->content_encoding, "x-gzip") == 0 ||
2293 | g_ascii_strcasecmp(headers->content_encoding, "x-deflate") == 0))
2294 | {
2295 | uncomp_tvb = tvb_child_uncompress_zlib(tvb, next_tvb, 0,
2296 | tvb_captured_length(next_tvb));
2297 | }
2298 | #endif
2299 |
2300 | #ifdef HAVE_BROTLI1
2301 | if (http_decompress_body &&
2302 | g_ascii_strcasecmp(headers->content_encoding, "br") == 0)
2303 | {
2304 | uncomp_tvb = tvb_child_uncompress_brotli(tvb, next_tvb, 0,
2305 | tvb_captured_length(next_tvb));
2306 | }
2307 | #endif
2308 |
2309 | #ifdef HAVE_SNAPPY1
2310 | if (http_decompress_body &&
2311 | g_ascii_strcasecmp(headers->content_encoding, "snappy") == 0)
2312 | {
2313 | uncomp_tvb = tvb_child_uncompress_snappy(tvb, next_tvb, 0,
2314 | tvb_captured_length(next_tvb));
2315 | }
2316 | #endif
2317 |
2318 | #ifdef HAVE_ZSTD1
2319 | if (http_decompress_body &&
2320 | g_ascii_strcasecmp(headers->content_encoding, "zstd") == 0)
2321 | {
2322 | uncomp_tvb = tvb_child_uncompress_zstd(tvb, next_tvb, 0,
2323 | tvb_captured_length(next_tvb));
2324 | }
2325 | #endif
2326 |
2327 | if (http_decompress_body &&
2328 | g_ascii_strcasecmp(headers->content_encoding, "xpress") == 0)
2329 | {
2330 | /*
2331 | * [MS-WUSP] 2.1.1 Xpress Compression
2332 | * Segmented into a series of blocks and compressed with the
2333 | * Plain LZ77 variant of [MS-XCA] Xpress Compression Algorithm.
2334 | *
2335 | * XXX - Does Microsoft use any other variants of [MS-XCA]
2336 | * for Content-Encoding: xpress in any other situations
2337 | * besides Windows Update Services?
2338 | */
2339 | int comp_offset = 0;
2340 | int compressed_len;
2341 | tvbuff_t *block_tvb;
2342 | while (tvb_captured_length_remaining(next_tvb, comp_offset) >= 8) {
2343 | comp_offset += 4; // original length
2344 | compressed_len = tvb_get_int32(next_tvb, comp_offset, ENC_LITTLE_ENDIAN0x80000000);
2345 | /*
2346 | * "The compressed size of each block MUST NOT be greater
2347 | * than 65535 bytes."
2348 | */
2349 | if (compressed_len <= 0 || compressed_len > 65535) {
2350 | break;
2351 | }
2352 | if (!tvb_bytes_exist(next_tvb, comp_offset, compressed_len)) {
2353 | break;
2354 | }
2355 | comp_offset += 4;
2356 | block_tvb = tvb_child_uncompress_lz77(tvb,
2357 | tvb_new_subset_length(next_tvb, comp_offset, compressed_len),
2358 | 0, compressed_len);
2359 | if (block_tvb) {
2360 | if (uncomp_tvb == NULL((void*)0)) {
2361 | uncomp_tvb = tvb_new_composite();
2362 | }
2363 | tvb_composite_append(uncomp_tvb, block_tvb);
2364 | } else {
2365 | break;
2366 | }
2367 | comp_offset += compressed_len;
2368 | }
2369 | if (uncomp_tvb != NULL((void*)0)) {
2370 | /*
2371 | * XXX - Should we add an expert info for partial
2372 | * decompression if we didn't finish? I.e., if
2373 | * tvb_captured_length_remaining(next_tvb, comp_offset) > 0
2374 | */
2375 | tvb_composite_finalize(uncomp_tvb);
2376 | }
2377 | }
2378 |
2379 | /*
2380 | * Add the encoded entity to the protocol tree
2381 | */
2382 | e_tree = proto_tree_add_subtree_format(http_tree, next_tvb,
2383 | 0, tvb_captured_length(next_tvb), ett_http_encoded_entity, &e_ti,
2384 | "Content-encoded entity body (%s): %u bytes",
2385 | headers->content_encoding,
2386 | tvb_captured_length(next_tvb));
2387 |
2388 | if (uncomp_tvb != NULL((void*)0)) {
2389 | /*
2390 | * Decompression worked
2391 | */
2392 |
2393 | /* XXX - Don't free this, since it's possible
2394 | * that the data was only partially
2395 | * decompressed, such as when desegmentation
2396 | * isn't enabled.
2397 | *
2398 | tvb_free(next_tvb);
2399 | */
2400 | proto_item_append_text(e_ti, " -> %u bytes", tvb_captured_length(uncomp_tvb));
2401 | next_tvb = uncomp_tvb;
2402 | add_new_data_source(pinfo, next_tvb,
2403 | "Uncompressed entity body");
2404 | } else {
2405 | if (http_decompress_body) {
2406 | /* XXX - We should distinguish between "failed", "unsupported
2407 | * only because support wasn't compiled in", and "unsupported
2408 | * by Wireshark", to indicate whether the problem is with
2409 | * the capture file, the build, or Wireshark.
2410 | */
2411 | expert_add_info(pinfo, e_ti, &ei_http_decompression_failed);
2412 | }
2413 | else {
2414 | expert_add_info(pinfo, e_ti, &ei_http_decompression_disabled);
2415 | }
2416 | /* XXX: Should this be sent to the follow tap? */
2417 | call_data_dissector(next_tvb, pinfo, e_tree);
2418 |
2419 | goto body_dissected;
2420 | }
2421 | }
2422 | /*
2423 | * Note that a new data source is added for the entity body
2424 | * only if it was content-encoded and/or transfer-encoded.
2425 | */
2426 |
2427 | /* Save values for the Export Object GUI feature if we have
2428 | * an active listener to process it (which happens when
2429 | * the export object window is open). */
2430 | /* XXX: Do we really want to send it to Export Object if we didn't
2431 | * get the headers, so that this is just a fragment of Continuation
2432 | * Data and not a complete object?
2433 | */
2434 | if(have_tap_listener(http_eo_tap)) {
2435 | eo_info = wmem_new0(pinfo->pool, http_eo_t)((http_eo_t*)wmem_alloc0((pinfo->pool), sizeof(http_eo_t)) );
2436 |
2437 | if (curr) {
2438 | eo_info->hostname = curr->http_host;
2439 | eo_info->filename = curr->request_uri;
2440 | }
2441 | eo_info->content_type = headers->content_type;
2442 | eo_info->payload = next_tvb;
2443 |
2444 | tap_queue_packet(http_eo_tap, pinfo, eo_info);
2445 | }
2446 |
2447 | /* Send it to Follow HTTP Stream and mark as file data */
2448 | if(have_tap_listener(http_follow_tap)) {
2449 | tap_queue_packet(http_follow_tap, pinfo, next_tvb);
2450 | }
2451 | data_len = tvb_captured_length(next_tvb);
2452 | proto_tree_add_bytes_format_value(http_tree, hf_http_file_data,
2453 | next_tvb, 0, data_len, NULL((void*)0), "%u byte%s", data_len, plurality(data_len, "", "s")((data_len) == 1 ? ("") : ("s")));
2454 |
2455 | if (tvb_captured_length(next_tvb) == 0)
2456 | goto body_dissected;
2457 |
2458 | /*
2459 | * Do subdissector checks.
2460 | */
2461 |
2462 | /*
2463 | * Is MIME sniffing enabled?
2464 | */
2465 | if (http_try_heuristic_first) {
2466 | /*
2467 | * Try the heuristic subdissectors.
2468 | */
2469 | uint16_t save_can_desegment = pinfo->can_desegment;
2470 | if (!(is_request_or_reply || streaming_chunk_mode)) {
2471 | /* If this isn't a request or reply, and we're not
2472 | * in streaming chunk mode, then we didn't try to
2473 | * desegment the body. (We think this is file data
2474 | * in the middle of a connection.) Allow the heuristic
2475 | * dissectors to desegment, if possible.
2476 | */
2477 | pinfo->can_desegment = pinfo->saved_can_desegment;
2478 | }
2479 | dissected = dissector_try_heuristic(heur_subdissector_list,
2480 | next_tvb, pinfo, tree, &hdtbl_entry, content_info);
2481 | pinfo->can_desegment = save_can_desegment;
2482 |
2483 | if (dissected) {
2484 | /*
2485 | * The subdissector dissected the body.
2486 | * Fix up the top-level item so that it doesn't
2487 | * include the stuff for that protocol.
2488 | */
2489 | if (ti != NULL((void*)0))
2490 | proto_item_set_len(ti, offset);
2491 | goto body_dissected;
2492 | }
2493 | }
2494 |
2495 | /* First, if we have a Content-Type value, check whether
2496 | * there's a subdissector for that media type.
2497 | */
2498 | if (headers->content_type != NULL((void*)0) && handle == NULL((void*)0)) {
2499 | /*
2500 | * We have a Content-Type value. Is there any subdissector
2501 | * for that content type?
2502 | */
2503 |
2504 | /*
2505 | * Calling the string handle for the media type
2506 | * dissector table will set pinfo->match_string
2507 | * to headers->content_type for us.
2508 | */
2509 | pinfo->match_string = headers->content_type;
2510 | handle = dissector_get_string_handle(
2511 | media_type_subdissector_table,
2512 | headers->content_type);
2513 | if (handle == NULL((void*)0) &&
2514 | strncmp(headers->content_type, "multipart/", sizeof("multipart/")-1) == 0) {
2515 | /* Try to decode the unknown multipart subtype anyway */
2516 | handle = dissector_get_string_handle(
2517 | media_type_subdissector_table,
2518 | "multipart/");
2519 | }
2520 | }
2521 |
2522 | /*
2523 | * Now, if we didn't find such a subdissector, check
2524 | * whether some subdissector asked that they be called
2525 | * if HTTP traffic was on some particular port. This
2526 | * handles protocols that use HTTP syntax but don't have
2527 | * a media type and instead use a specified port.
2528 | */
2529 | if (handle == NULL((void*)0)) {
2530 | /* If the HTTP dissector was called heuristically
2531 | * (or the HTTP dissector was called from the TLS
2532 | * dissector, which was called heuristically), then
2533 | * match_uint doesn't get set (or is likely set to
2534 | * 6 for IP_PROTO_TCP.) Some protocols (e.g., IPP)
2535 | * use the same specified port for both HTTP and
2536 | * HTTP over TLS, and one will be a heuristic match.
2537 | * In those cases, look at the src or dest port.
2538 | */
2539 | if (pinfo->match_uint == pinfo->srcport || pinfo->match_uint == pinfo->destport) {
2540 | handle = dissector_get_uint_handle(port_subdissector_table,
2541 | pinfo->match_uint);
2542 | } else if (http_type == MEDIA_CONTAINER_HTTP_REQUEST) {
2543 | handle = dissector_get_uint_handle(port_subdissector_table,
2544 | pinfo->destport);
2545 | } else if (http_type == MEDIA_CONTAINER_HTTP_RESPONSE) {
2546 | handle = dissector_get_uint_handle(port_subdissector_table,
2547 | pinfo->srcport);
2548 | }
2549 | }
2550 |
2551 | if (handle != NULL((void*)0)) {
2552 | /*
2553 | * We have a subdissector - call it.
2554 | */
2555 | if (streaming_chunk_mode) {
2556 | pinfo->match_string = headers->content_type;
2557 | /* reassemble and call subdissector */
2558 | dissected = (bool_Bool)reassemble_streaming_data_and_call_subdissector(next_tvb, pinfo, 0,
2559 | tvb_reported_length_remaining(next_tvb, 0), http_tree, proto_tree_get_parent_tree(tree),
2560 | http_streaming_reassembly_table, streaming_reassembly_data->streaming_reassembly_info,
2561 | get_http_chunk_frame_numget_virtual_frame_num64(tvb, pinfo, offset), handle,
2562 | proto_tree_get_parent_tree(tree), content_info,
2563 | "HTTP", &http_body_fragment_items, hf_http_body_segment);
2564 | } else {
2565 | dissected = (bool_Bool)call_dissector_only(handle, next_tvb, pinfo, tree, content_info);
2566 | }
2567 | if (!dissected)
2568 | expert_add_info(pinfo, http_tree, &ei_http_subdissector_failed);
2569 | }
2570 |
2571 | if (!dissected && !http_try_heuristic_first) {
2572 | /*
2573 | * We don't have a subdissector or we have one and it did not
2574 | * dissect the payload - try the heuristic subdissectors.
2575 | */
2576 | uint16_t save_can_desegment = pinfo->can_desegment;
2577 | if (!(is_request_or_reply || streaming_chunk_mode)) {
2578 | /* If this isn't a request or reply, and we're not
2579 | * in streaming chunk mode, then we didn't try to
2580 | * desegment the body. (We think this is file data
2581 | * in the middle of a connection.) Allow the heuristic
2582 | * dissectors to desegment, if possible.
2583 | */
2584 | pinfo->can_desegment = pinfo->saved_can_desegment;
2585 | }
2586 | dissected = dissector_try_heuristic(heur_subdissector_list,
2587 | next_tvb, pinfo, tree, &hdtbl_entry, content_info);
2588 | pinfo->can_desegment = save_can_desegment;
2589 | }
2590 |
2591 | if (dissected) {
2592 | /*
2593 | * The subdissector dissected the body.
2594 | * Fix up the top-level item so that it doesn't
2595 | * include the stuff for that protocol.
2596 | */
2597 | if (ti != NULL((void*)0))
2598 | proto_item_set_len(ti, offset);
2599 | } else {
2600 | if (headers->content_type != NULL((void*)0)) {
2601 | /*
2602 | * Calling the default media handle if there is a content-type that
2603 | * wasn't handled above.
2604 | */
2605 | call_dissector_with_data(media_handle, next_tvb, pinfo, tree, content_info);
2606 | } else {
2607 | /* Call the default data dissector */
2608 | call_data_dissector(next_tvb, pinfo, http_tree);
2609 | }
2610 | }
2611 |
2612 | body_dissected:
2613 | /*
2614 | * We've processed "datalen" bytes worth of data
2615 | * (which may be no data at all); advance the
2616 | * offset past whatever data we've processed.
2617 | */
2618 | offset += datalen;
2619 | }
2620 |
2621 | /* Detect protocol changes after receiving full response headers. */
2622 | if (http_type == MEDIA_CONTAINER_HTTP_RESPONSE && curr && pinfo->desegment_offset <= 0 && pinfo->desegment_len == 0) {
2623 | dissector_handle_t next_handle = NULL((void*)0);
2624 | bool_Bool server_acked = false0;
2625 |
2626 | /*
2627 | * SSTP uses a special request method (instead of the Upgrade
2628 | * header) and expects a 200 response to set up the session.
2629 | */
2630 | if (g_strcmp0(curr->request_method, "SSTP_DUPLEX_POST") == 0 && curr->response_code == 200) {
2631 | next_handle = sstp_handle;
2632 | server_acked = true1;
2633 | }
2634 |
2635 | /*
2636 | * An HTTP/1.1 upgrade only proceeds if the server responds
2637 | * with 101 Switching Protocols. See RFC 7230 Section 6.7.
2638 | */
2639 | if (headers->upgrade && curr->response_code == 101) {
2640 | next_handle = http_upgrade_dissector(headers->upgrade);
2641 | server_acked = true1;
2642 | }
2643 |
2644 | if (server_acked && !PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
2645 | conv_data->startframe = pinfo->num;
2646 | conv_data->startoffset = offset;
2647 | conv_data->next_handle = next_handle;
2648 | copy_address_wmem(wmem_file_scope(), &conv_data->server_addr, &pinfo->src);
2649 | conv_data->server_port = pinfo->srcport;
2650 | /* Prepare structure for upgrade protocol data */
2651 | conv_data->upgrade_info = wmem_new0(wmem_file_scope(), http_upgrade_info_t)((http_upgrade_info_t*)wmem_alloc0((wmem_file_scope()), sizeof (http_upgrade_info_t)));
2652 | conv_data->upgrade_info->server_port = pinfo->srcport;
2653 | conv_data->upgrade_info->http_version = 1;
2654 | conv_data->upgrade_info->get_header_value = http_get_header_value;
2655 | }
2656 | }
2657 |
2658 | if (stat_info)
2659 | tap_queue_packet(http_tap, pinfo, stat_info);
2660 |
2661 | return offset - orig_offset;
2662 | }
2663 |
2664 | /* This can be used to dissect an HTTP request until such time
2665 | * that a more complete dissector is written for that HTTP request.
2666 | * This simple dissector only puts the request method, URI, and
2667 | * protocol version into a sub-tree.
2668 | */
2669 | static void
2670 | basic_request_dissector(packet_info *pinfo, tvbuff_t *tvb, proto_tree *tree,
2671 | unsigned offset, const unsigned char *line, const unsigned char *lineend,
2672 | http_conv_t *conv_data _U___attribute__((unused)), http_req_res_t *curr)
2673 | {
2674 | const unsigned char *next_token;
2675 | const char *request_uri;
2676 | unsigned tokenlen;
2677 | proto_item* ti;
2678 | http_info_value_t *stat_info = p_get_proto_data(pinfo->pool, pinfo, proto_http, HTTP_PROTO_DATA_INFO1);
2679 |
2680 | /* The first token is the method. */
2681 | tokenlen = get_token_len(line, lineend, &next_token);
2682 | if (tokenlen == 0)
1 | Assuming 'tokenlen' is not equal to 0 | →
2 | ← | Taking false branch | →
2683 | return;
2684 | proto_tree_add_item(tree, hf_http_request_method, tvb, offset, tokenlen,
2685 | ENC_ASCII0x00000000);
2686 | if ((next_token - line) > 2 && next_token[-1] == ' ' && next_token[-2] == ' ') {
3 | ← | Assuming the condition is false | →
2687 | /* Two spaces in a now indicates empty URI, so roll back one here */
2688 | next_token--;
2689 | }
2690 | offset += (unsigned) (next_token - line);
2691 | line = next_token;
2692 |
2693 | /* The next token is the URI. */
2694 | tokenlen = get_token_len(line, lineend, &next_token);
2695 |
2696 | /* Save the request URI for various later uses */
2697 | request_uri = (char*)tvb_get_string_enc(pinfo->pool, tvb, offset, tokenlen, ENC_ASCII0x00000000);
4 | ← | Value assigned to 'request_uri' | →
2698 |
2699 | if (request_uri == NULL((void*)0) && curr)
5 | ← | Assuming 'request_uri' is equal to NULL | →
6 | ← | Assuming 'curr' is null | →
7 | ← | Taking false branch | →
2700 | request_uri = curr->request_uri;
2701 |
2702 | stat_info->request_uri = wmem_strdup(pinfo->pool, request_uri);
2703 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited) && curr) {
8 | ← | Assuming field 'visited' is not equal to 0 | →
2704 | curr->request_uri = wmem_strdup(wmem_file_scope(), request_uri);
2705 | }
2706 | ti = proto_tree_add_string(tree, hf_http_request_uri, tvb, offset, tokenlen, request_uri);
2707 | const char *p;
2708 |
2709 | /* RFC 9112 §3.2: No whitespace is allowed in the request-target. */
2710 | for (p = request_uri; *p != '\0'; p++) {
9 | ← | Null pointer value stored to 'p' | →
10 | ← | Dereference of null pointer (loaded from variable 'p')
2711 | if (*p == ' ' || *p == '\t') {
2712 | expert_add_info(pinfo, ti, &ei_http_request_uri_whitespace);
2713 | break;
2714 | }
2715 | }
2716 | http_add_path_components_to_tree(tvb, pinfo, ti, offset, tokenlen);
2717 | offset += (unsigned) (next_token - line);
2718 | line = next_token;
2719 |
2720 | /* Everything to the end of the line is the version. */
2721 | tokenlen = (int) (lineend - line);
2722 | proto_tree_add_item(tree, hf_http_request_version, tvb, offset, tokenlen,
2723 | ENC_ASCII0x00000000);
2724 | }
2725 |
2726 | static int
2727 | parse_http_status_code(const unsigned char *line, const unsigned char *lineend)
2728 | {
2729 | const unsigned char *next_token;
2730 | unsigned tokenlen;
2731 | char response_code_chars[4];
2732 | int32_t status_code = 0;
2733 |
2734 | /*
2735 | * The first token is the HTTP Version.
2736 | */
2737 | tokenlen = get_token_len(line, lineend, &next_token);
2738 | if (tokenlen == 0)
2739 | return 0;
2740 | line = next_token;
2741 |
2742 | /*
2743 | * The second token is the Status Code.
2744 | */
2745 | tokenlen = get_token_len(line, lineend, &next_token);
2746 | if (tokenlen != 3)
2747 | return 0;
2748 |
2749 | memcpy(response_code_chars, line, 3);
2750 | response_code_chars[3] = '\0';
2751 | if (!ws_strtoi32(response_code_chars, NULL((void*)0), &status_code))
2752 | return 0;
2753 |
2754 | return status_code;
2755 | }
2756 |
2757 | static void
2758 | basic_response_dissector(packet_info *pinfo, tvbuff_t *tvb, proto_tree *tree,
2759 | unsigned offset, const unsigned char *line, const unsigned char *lineend,
2760 | http_conv_t *conv_data _U___attribute__((unused)), http_req_res_t *curr)
2761 | {
2762 | const unsigned char *next_token;
2763 | const unsigned char *status_code_token;
2764 | unsigned tokenlen;
2765 | unsigned i;
2766 | unsigned expert_len;
2767 | bool_Bool invalid_status_code_token = false0;
2768 | int status_code_offset;
2769 | proto_item *ti;
2770 | proto_item *r_ti;
2771 | http_info_value_t *stat_info = p_get_proto_data(pinfo->pool, pinfo, proto_http, HTTP_PROTO_DATA_INFO1);
2772 |
2773 | /*
2774 | * The first token is the HTTP Version.
2775 | */
2776 | tokenlen = get_token_len(line, lineend, &next_token);
2777 | if (tokenlen == 0)
2778 | return;
2779 | proto_tree_add_item(tree, hf_http_response_version, tvb, offset, tokenlen,
2780 | ENC_ASCII0x00000000);
2781 | /* Advance to the start of the next token. */
2782 | offset += (int) (next_token - line);
2783 |
2784 | /*
2785 | * The second token is the Status Code.
2786 | */
2787 | status_code_token = next_token;
2788 | status_code_offset = offset;
2789 | tokenlen = get_token_len(status_code_token, lineend, &next_token);
2790 |
2791 | /* Validate status code token */
2792 | if (tokenlen != 3) {
2793 | invalid_status_code_token = true1;
2794 | } else {
2795 | for (i = 0; i < tokenlen; i++) {
2796 | if (!g_ascii_isdigit(status_code_token[i])((g_ascii_table[(guchar) (status_code_token[i])] & G_ASCII_DIGIT ) != 0)) {
2797 | invalid_status_code_token = true1;
2798 | break;
2799 | }
2800 | }
2801 | }
2802 |
2803 | expert_len = tokenlen;
2804 | if (expert_len == 0 && tvb_reported_length_remaining(tvb, status_code_offset) > 0)
2805 | expert_len = 1;
2806 |
2807 | if (tokenlen >= 3) {
2808 | ws_buftou32(status_code_token, 3, NULL((void*)0), &stat_info->response_code);
2809 | if (curr) {
2810 | curr->response_code = stat_info->response_code;
2811 | }
2812 | }
2813 |
2814 | ti = proto_tree_add_uint(tree, hf_http_response_code, tvb, status_code_offset,
2815 | tokenlen < 3 ? expert_len : 3,
2816 | stat_info->response_code);
2817 | if (expert_len > 3)
2818 | proto_item_set_len(ti, expert_len);
2819 |
2820 | if (invalid_status_code_token) {
2821 | expert_add_info_format(pinfo, ti, &ei_http_response_code_invalid,
2822 | "Invalid HTTP response status code token: \"%s\" (expected exactly 3 digits)",
2823 | format_text(pinfo->pool, (const char *)status_code_token, tokenlen));
2824 | }
2825 | if (tokenlen < 3)
2826 | return;
2827 |
2828 | r_ti = proto_tree_add_string(tree, hf_http_response_code_desc,
2829 | tvb, status_code_offset, 3, val_to_str(pinfo->pool, stat_info->response_code,
2830 | vals_http_status_code, "Unknown (%d)"));
2831 |
2832 | proto_item_set_generated(r_ti);
2833 |
2834 | /* Advance to the start of the next token. */
2835 | offset += (int) (next_token - status_code_token);
2836 | line = next_token;
2837 |
2838 | /*
2839 | * The remaining tokens in the line comprise the Reason Phrase.
2840 | */
2841 | tokenlen = (int) (lineend - line);
2842 | if (tokenlen >= 1) {
2843 | proto_tree_add_item(tree, hf_http_response_phrase, tvb, offset,
2844 | tokenlen, ENC_ASCII0x00000000);
2845 | }
2846 | }
2847 |
2848 | /*
2849 | * Dissect the http data chunks and add them to the tree.
2850 | */
2851 | static unsigned
2852 | chunked_encoding_dissector(tvbuff_t **tvb_ptr, packet_info *pinfo,
2853 | proto_tree *tree, unsigned offset)
2854 | {
2855 | tvbuff_t *tvb;
2856 | uint32_t datalen;
2857 | uint32_t orig_datalen;
2858 | unsigned chunked_data_size;
2859 | proto_tree *subtree;
2860 | proto_item *pi_chunked = NULL((void*)0);
2861 | uint8_t *raw_data;
2862 | unsigned raw_len;
2863 | unsigned chunk_counter = 0;
2864 | int last_chunk_id = -1;
2865 |
2866 | if ((tvb_ptr == NULL((void*)0)) || (*tvb_ptr == NULL((void*)0))) {
2867 | return 0;
2868 | }
2869 |
2870 | tvb = *tvb_ptr;
2871 |
2872 | datalen = tvb_reported_length_remaining(tvb, offset);
2873 |
2874 | subtree = proto_tree_add_subtree(tree, tvb, offset, datalen,
2875 | ett_http_chunked_response, &pi_chunked,
2876 | "HTTP chunked response");
2877 |
2878 | /* Dechunk the "chunked response" to a new memory buffer */
2879 | /* XXX: Composite tvbuffers do work now, so we should probably
2880 | * use that to avoid the memcpys unless necessary.
2881 | */
2882 | orig_datalen = datalen;
2883 | raw_data = (uint8_t *)wmem_alloc(pinfo->pool, datalen);
2884 | raw_len = 0;
2885 | chunked_data_size = 0;
2886 |
2887 | while (datalen > 0) {
2888 | uint32_t chunk_size;
2889 | unsigned chunk_offset;
2890 | unsigned linelen;
2891 | unsigned endoff;
2892 | bool_Bool found;
2893 |
2894 | found = tvb_find_line_end_remaining(tvb, offset, &linelen , &chunk_offset);
2895 |
2896 | if (linelen == 0 || found == false0) {
2897 | /* Can't get the chunk size line */
2898 | break;
2899 | }
2900 |
2901 | tvb_get_string_uint(tvb, offset, linelen, ENC_STR_HEX0x02000000, &chunk_size, &endoff);
2902 |
2903 | if (chunk_size > datalen) {
2904 | /*
2905 | * The chunk size is more than what's in the tvbuff,
2906 | * so either the user hasn't enabled decoding, or all
2907 | * of the segments weren't captured.
2908 | */
2909 | chunk_size = datalen;
2910 | }
2911 |
2912 | chunked_data_size += chunk_size;
2913 |
2914 | DISSECTOR_ASSERT((raw_len+chunk_size) <= orig_datalen)((void) (((raw_len+chunk_size) <= orig_datalen) ? (void)0 : (proto_report_dissector_bug("%s:%u: failed assertion \"%s\"" , "epan/dissectors/packet-http.c", 2914, "(raw_len+chunk_size) <= orig_datalen" ))));
2915 | tvb_memcpy(tvb, (uint8_t *)(raw_data + raw_len), chunk_offset, chunk_size);
2916 | raw_len += chunk_size;
2917 |
2918 | ++chunk_counter;
2919 |
2920 | if (subtree) {
2921 | proto_tree *chunk_subtree;
2922 | proto_item *chunk_size_item;
2923 |
2924 | if(chunk_size == 0) {
2925 | chunk_subtree = proto_tree_add_subtree(subtree, tvb,
2926 | offset,
2927 | chunk_offset - offset + chunk_size + 2,
2928 | ett_http_chunk_data, NULL((void*)0),
2929 | "End of chunked encoding");
2930 | last_chunk_id = chunk_counter - 1;
2931 | } else {
2932 | chunk_subtree = proto_tree_add_subtree_format(subtree, tvb,
2933 | offset,
2934 | chunk_offset - offset + chunk_size + 2,
2935 | ett_http_chunk_data, NULL((void*)0),
2936 | "Data chunk (%u octets)", chunk_size);
2937 | }
2938 |
2939 | chunk_size_item = proto_tree_add_uint(chunk_subtree, hf_http_chunk_size, tvb, offset,
2940 | 1, chunk_size);
2941 | proto_item_set_len(chunk_size_item, chunk_offset - offset);
2942 |
2943 | /* last-chunk does not have chunk-data CRLF. */
2944 | if (chunk_size > 0) {
2945 | /*
2946 | * Adding the chunk as FT_BYTES means that, in
2947 | * TShark, you get the entire chunk dumped
2948 | * out in hex, in addition to whatever
2949 | * dissection is done on the reassembled data.
2950 | */
2951 | proto_tree_add_item(chunk_subtree, hf_http_chunk_data, tvb, chunk_offset, chunk_size, ENC_NA0x00000000);
2952 | proto_tree_add_item(chunk_subtree, hf_http_chunk_boundary, tvb,
2953 | chunk_offset + chunk_size, 2, ENC_NA0x00000000);
2954 | }
2955 | }
2956 |
2957 | offset = chunk_offset + chunk_size; /* beginning of next chunk */
2958 | if (chunk_size > 0) offset += 2; /* CRLF of chunk */
2959 | datalen = tvb_reported_length_remaining(tvb, offset);
2960 |
2961 | /* This is the last chunk */
2962 | if (chunk_size == 0) {
2963 | /* Check for: trailer-part CRLF.
2964 | * trailer-part = *( header-field CRLF ) */
2965 | unsigned trailer_offset = offset, trailer_len;
2966 | unsigned header_field_len;
2967 | bool_Bool header_field_len_found;
2968 | /* Skip all header-fields. */
2969 | do {
2970 | trailer_len = trailer_offset - offset;
2971 | header_field_len_found = tvb_find_line_end_length(tvb,
2972 | trailer_offset,
2973 | datalen - trailer_len,
2974 | &header_field_len,
2975 | &trailer_offset);
2976 | } while (header_field_len_found && header_field_len > 0);
2977 | if (trailer_len > 0) {
2978 | proto_tree_add_item(subtree,
2979 | hf_http_chunked_trailer_part,
2980 | tvb, offset, trailer_len, ENC_ASCII0x00000000);
2981 | offset += trailer_len;
2982 | datalen -= trailer_len;
2983 | }
2984 |
2985 | /* last CRLF of chunked-body is found. */
2986 | if (header_field_len == 0) {
2987 | proto_tree_add_format_text(subtree, tvb, offset,
2988 | trailer_offset - offset);
2989 | datalen -= trailer_offset - offset;
2990 | }
2991 | break;
2992 | }
2993 | }
2994 |
2995 | /* datalen is the remaining bytes that are available for consumption. If
2996 | * smaller than orig_datalen, then bytes were consumed. */
2997 | if (datalen < orig_datalen) {
2998 | tvbuff_t *new_tvb;
2999 | proto_item_set_len(pi_chunked, orig_datalen - datalen);
3000 | new_tvb = tvb_new_child_real_data(tvb, raw_data, chunked_data_size, chunked_data_size);
3001 | *tvb_ptr = new_tvb;
3002 | }
3003 |
3004 | if (chunk_counter > 0) {
3005 | proto_item* ti_http = proto_tree_get_parent(tree);
3006 | proto_item_append_text(ti_http, ", has %d chunk%s%s",
3007 | chunk_counter, plurality(chunk_counter, "", "s")((chunk_counter) == 1 ? ("") : ("s")),
3008 | (last_chunk_id < 0 ? "" : " (including last chunk)"));
3009 |
3010 | if (last_chunk_id == 0) {
3011 | /* only append text to column while starting with last chunk */
3012 | col_append_sep_str(pinfo->cinfo, COL_INFO, " ", "[Last Chunk]");
3013 | }
3014 | }
3015 |
3016 | /* Size of chunked-body or 0 if none was found. */
3017 | return orig_datalen - datalen;
3018 | }
3019 |
3020 | static bool_Bool
3021 | http_conversation_is_connect(conversation_t *conv, uint32_t frame_num)
3022 | {
3023 | if (!conv) {
3024 | return false0;
3025 | }
3026 |
3027 | http_conv_t *conv_data = (http_conv_t *)conversation_get_proto_data(conv, proto_http);
3028 | if (conv_data) {
3029 | http_req_res_t *curr_req_res = conv_data->req_res_tail;
3030 | /* Any 2xx (Successful) response indicates the sender will
3031 | * switch to tunnel mode immediately after the response header
3032 | * section. */
3033 | if(frame_num >= conv_data->startframe &&
3034 | curr_req_res &&
3035 | curr_req_res->response_code >= 200 &&
3036 | curr_req_res->response_code < 300 &&
3037 | curr_req_res->request_method &&
3038 | strncmp(curr_req_res->request_method, "CONNECT", 7) == 0 &&
3039 | curr_req_res->request_uri) {
3040 |
3041 | return true1;
3042 | }
3043 | }
3044 |
3045 | return false0;
3046 | }
3047 |
3048 | /* Call a subdissector to handle HTTP CONNECT's traffic */
3049 | static void
3050 | http_payload_subdissector(tvbuff_t *tvb, proto_tree *tree,
3051 | packet_info *pinfo, http_conv_t *conv_data, struct tcpinfo *tcpinfo)
3052 | {
3053 | uint32_t *ptr = NULL((void*)0);
3054 | uint32_t uri_port, saved_port, srcport, destport;
3055 | address uri_addr, saved_addr;
3056 | address *addrp;
3057 | char **strings; /* An array for splitting the request URI into hostname and port */
3058 | proto_item *item;
3059 | proto_tree *proxy_tree;
3060 | conversation_t *conv;
3061 | bool_Bool from_server = pinfo->srcport == conv_data->server_port &&
3062 | addresses_equal(&conv_data->server_addr, &pinfo->src);
3063 |
3064 | /* Grab the destination port number from the request URI to find the right subdissector */
3065 | strings = wmem_strsplit(pinfo->pool, conv_data->req_res_tail->request_uri, ":", 2);
3066 |
3067 | if(strings[0] != NULL((void*)0) && strings[1] != NULL((void*)0)) {
3068 | /*
3069 | * The string was successfully split in two
3070 | * Create a proxy-connect subtree
3071 | */
3072 | item = proto_tree_add_item(tree, proto_http, tvb, 0, -1, ENC_NA0x00000000);
3073 | proxy_tree = proto_item_add_subtree(item, ett_http);
3074 |
3075 | item = proto_tree_add_string(proxy_tree, hf_http_proxy_connect_host,
3076 | tvb, 0, 0, strings[0]);
3077 | proto_item_set_generated(item);
3078 |
3079 | if (!ws_strtou32(strings[1], NULL((void*)0), &uri_port)) {
3080 | proto_tree_add_expert_format(proxy_tree, pinfo, &ei_http_request_uri_invalid,
3081 | tvb, 0, 0, "Invalid target port number (%s)", strings[1]);
3082 | return;
3083 | }
3084 |
3085 | item = proto_tree_add_uint(proxy_tree, hf_http_proxy_connect_port,
3086 | tvb, 0, 0, uri_port);
3087 | proto_item_set_generated(item);
3088 |
3089 | /* Set the port and address to the proxied ones so that
3090 | * decode_tcp_ports doesn't call the current conversation
3091 | * dissector (we must set the address if the URI port is the
3092 | * same), and other functions that retrieve conversation data
3093 | * or set the conversation dissector don't affect the original
3094 | * conversation but the proxied one.
3095 | */
3096 |
3097 | /* Just use the string as a string address. */
3098 | set_address(&uri_addr, AT_STRINGZ, (int)strlen(strings[0]) + 1, strings[0]);
3099 | /* We may get stuck in a recursion loop if we let decode_tcp_ports() call us.
3100 | * So, if the conversation that would be called also is CONNECT,
3101 | * call the data dissector directly instead. The CONNECT method
3102 | * is blind forwarding of data and consumes no payload itself
3103 | * here, so infinite loops are possible. (Strictly, to avoid a
3104 | * loop we must only assure that the same 5-tuple isn't reused,
3105 | * which would take more work to check.)
3106 | */
3107 | if (!from_server) {
3108 | srcport = pinfo->srcport;
3109 | destport = uri_port;
3110 | conv = find_conversation(pinfo->num, &pinfo->src, &uri_addr, CONVERSATION_TCP, srcport, destport, 0);
3111 | } else {
3112 | srcport = uri_port;
3113 | destport = pinfo->destport;
3114 | conv = find_conversation(pinfo->num, &uri_addr, &pinfo->dst, CONVERSATION_TCP, srcport, destport, 0);
3115 | }
3116 |
3117 | if (http_conversation_is_connect(conv, pinfo->num)) {
3118 | call_data_dissector(tvb, pinfo, tree);
3119 | } else {
3120 | /* set pinfo->{src/dst port} and call the TCP sub-dissector lookup */
3121 | if (!from_server) {
3122 | ptr = &pinfo->destport;
3123 | addrp = &pinfo->src;
3124 | } else {
3125 | ptr = &pinfo->srcport;
3126 | addrp = &pinfo->dst;
3127 | }
3128 |
3129 | /* Increase pinfo->can_desegment because we are traversing
3130 | * http and want to preserve desegmentation functionality for
3131 | * the proxied protocol
3132 | */
3133 | if( pinfo->can_desegment>0 )
3134 | pinfo->can_desegment++;
3135 |
3136 | copy_address_shallow(&saved_addr, addrp);
3137 | copy_address_shallow(addrp, &uri_addr);
3138 | saved_port = *ptr;
3139 | *ptr = uri_port;
3140 | decode_tcp_ports(tvb, 0, pinfo, tree,
3141 | pinfo->srcport, pinfo->destport, NULL((void*)0),
3142 | tcpinfo);
3143 | *ptr = saved_port;
3144 | copy_address_shallow(addrp, &saved_addr);
3145 | }
3146 | }
3147 | }
3148 |
3149 |
3150 |
3151 | /*
3152 | * XXX - this won't handle HTTP 0.9 replies, but they're all data
3153 | * anyway.
3154 | */
3155 | static int
3156 | is_http_request_or_reply(packet_info *pinfo, const char *data, unsigned linelen, media_container_type_t *type,
3157 | ReqRespDissector *reqresp_dissector,
3158 | http_conv_t *conv_data _U___attribute__((unused)))
3159 | {
3160 | http_info_value_t *stat_info = p_get_proto_data(pinfo->pool, pinfo, proto_http, HTTP_PROTO_DATA_INFO1);
3161 | int isHttpRequestOrReply = false0;
3162 |
3163 | /*
3164 | * From RFC 2774 - An HTTP Extension Framework
3165 | *
3166 | * Support the command prefix that identifies the presence of
3167 | * a "mandatory" header.
3168 | */
3169 | if (linelen >= 2 && strncmp(data, "M-", 2) == 0) {
3170 | data += 2;
3171 | linelen -= 2;
3172 | }
3173 |
3174 | /*
3175 | * From draft-cohen-gena-client-01.txt, available from the uPnP forum:
3176 | * NOTIFY, SUBSCRIBE, UNSUBSCRIBE
3177 | *
3178 | * From draft-ietf-dasl-protocol-00.txt, a now vanished Microsoft draft:
3179 | * SEARCH
3180 | */
3181 | if ((linelen >= 5 && strncmp(data, "HTTP/", 5) == 0) ||
3182 | (linelen >= 3 && strncmp(data, "ICY", 3) == 0)) {
3183 | *type = MEDIA_CONTAINER_HTTP_RESPONSE;
3184 | isHttpRequestOrReply = true1; /* response */
3185 | if (reqresp_dissector)
3186 | *reqresp_dissector = basic_response_dissector;
3187 | } else {
3188 | const unsigned char * ptr = (const unsigned char *)data;
3189 | unsigned indx = 0;
3190 |
3191 | /* Look for the space following the Method */
3192 | while (indx < linelen) {
3193 | if (*ptr == ' ')
3194 | break;
3195 | else {
3196 | ptr++;
3197 | indx++;
3198 | }
3199 | }
3200 |
3201 | /* Check the methods that have same length */
3202 | switch (indx) {
3203 |
3204 | case 3:
3205 | if (strncmp(data, "GET", indx) == 0 ||
3206 | strncmp(data, "PUT", indx) == 0) {
3207 | *type = MEDIA_CONTAINER_HTTP_REQUEST;
3208 | isHttpRequestOrReply = true1;
3209 | }
3210 | break;
3211 |
3212 | case 4:
3213 | if (strncmp(data, "COPY", indx) == 0 ||
3214 | strncmp(data, "HEAD", indx) == 0 ||
3215 | strncmp(data, "LOCK", indx) == 0 ||
3216 | strncmp(data, "MOVE", indx) == 0 ||
3217 | strncmp(data, "POLL", indx) == 0 ||
3218 | strncmp(data, "POST", indx) == 0) {
3219 | *type = MEDIA_CONTAINER_HTTP_REQUEST;
3220 | isHttpRequestOrReply = true1;
3221 | }
3222 | break;
3223 |
3224 | case 5:
3225 | if (strncmp(data, "BCOPY", indx) == 0 ||
3226 | strncmp(data, "BMOVE", indx) == 0 ||
3227 | strncmp(data, "MKCOL", indx) == 0 ||
3228 | strncmp(data, "TRACE", indx) == 0 ||
3229 | strncmp(data, "PATCH", indx) == 0 || /* RFC 5789 */
3230 | strncmp(data, "LABEL", indx) == 0 || /* RFC 3253 8.2 */
3231 | strncmp(data, "MERGE", indx) == 0 || /* RFC 3253 11.2 */
3232 | strncmp(data, "QUERY", indx) == 0) { /* RFC 10008 */
3233 | *type = MEDIA_CONTAINER_HTTP_REQUEST;
3234 | isHttpRequestOrReply = true1;
3235 | }
3236 | break;
3237 |
3238 | case 6:
3239 | if (strncmp(data, "DELETE", indx) == 0 ||
3240 | strncmp(data, "SEARCH", indx) == 0 ||
3241 | strncmp(data, "UNLOCK", indx) == 0 ||
3242 | strncmp(data, "REPORT", indx) == 0 || /* RFC 3253 3.6 */
3243 | strncmp(data, "UPDATE", indx) == 0) { /* RFC 3253 7.1 */
3244 | *type = MEDIA_CONTAINER_HTTP_REQUEST;
3245 | isHttpRequestOrReply = true1;
3246 | }
3247 | else if (strncmp(data, "NOTIFY", indx) == 0) {
3248 | *type = MEDIA_CONTAINER_HTTP_NOTIFICATION;
3249 | isHttpRequestOrReply = true1;
3250 | }
3251 | break;
3252 |
3253 | case 7:
3254 | if (strncmp(data, "BDELETE", indx) == 0 ||
3255 | strncmp(data, "CONNECT", indx) == 0 ||
3256 | strncmp(data, "OPTIONS", indx) == 0 ||
3257 | strncmp(data, "CHECKIN", indx) == 0) { /* RFC 3253 4.4, 9.4 */
3258 | *type = MEDIA_CONTAINER_HTTP_REQUEST;
3259 | isHttpRequestOrReply = true1;
3260 | }
3261 | break;
3262 |
3263 | case 8:
3264 | if (strncmp(data, "PROPFIND", indx) == 0 ||
3265 | strncmp(data, "CHECKOUT", indx) == 0 || /* RFC 3253 4.3, 9.3 */
3266 | strncmp(data, "CCM_POST", indx) == 0) {
3267 | *type = MEDIA_CONTAINER_HTTP_REQUEST;
3268 | isHttpRequestOrReply = true1;
3269 | }
3270 | break;
3271 |
3272 | case 9:
3273 | if (strncmp(data, "SUBSCRIBE", indx) == 0) {
3274 | *type = MEDIA_CONTAINER_HTTP_NOTIFICATION;
3275 | isHttpRequestOrReply = true1;
3276 | } else if (strncmp(data, "PROPPATCH", indx) == 0 ||
3277 | strncmp(data, "BPROPFIND", indx) == 0) {
3278 | *type = MEDIA_CONTAINER_HTTP_REQUEST;
3279 | isHttpRequestOrReply = true1;
3280 | }
3281 | break;
3282 |
3283 | case 10:
3284 | if (strncmp(data, "BPROPPATCH", indx) == 0 ||
3285 | strncmp(data, "UNCHECKOUT", indx) == 0 || /* RFC 3253 4.5 */
3286 | strncmp(data, "MKACTIVITY", indx) == 0) { /* RFC 3253 13.5 */
3287 | *type = MEDIA_CONTAINER_HTTP_REQUEST;
3288 | isHttpRequestOrReply = true1;
3289 | }
3290 | break;
3291 |
3292 | case 11:
3293 | if (strncmp(data, "MKWORKSPACE", indx) == 0 || /* RFC 3253 6.3 */
3294 | strncmp(data, "RPC_CONNECT", indx) == 0 || /* [MS-RPCH] 2.1.1.1.1 */
3295 | strncmp(data, "RPC_IN_DATA", indx) == 0) { /* [MS-RPCH] 2.1.2.1.1 */
3296 | *type = MEDIA_CONTAINER_HTTP_REQUEST;
3297 | isHttpRequestOrReply = true1;
3298 | } else if (strncmp(data, "UNSUBSCRIBE", indx) == 0) {
3299 | *type = MEDIA_CONTAINER_HTTP_NOTIFICATION;
3300 | isHttpRequestOrReply = true1;
3301 | }
3302 | break;
3303 |
3304 | case 12:
3305 | if (strncmp(data, "RPC_OUT_DATA", indx) == 0) { /* [MS-RPCH] 2.1.2.1.2 */
3306 | *type = MEDIA_CONTAINER_HTTP_REQUEST;
3307 | isHttpRequestOrReply = true1;
3308 | }
3309 | break;
3310 |
3311 | case 15:
3312 | if (strncmp(data, "VERSION-CONTROL", indx) == 0) { /* RFC 3253 3.5 */
3313 | *type = MEDIA_CONTAINER_HTTP_REQUEST;
3314 | isHttpRequestOrReply = true1;
3315 | }
3316 | break;
3317 |
3318 | case 16:
3319 | if (strncmp(data, "BASELINE-CONTROL", indx) == 0) { /* RFC 3253 12.6 */
3320 | *type = MEDIA_CONTAINER_HTTP_REQUEST;
3321 | isHttpRequestOrReply = true1;
3322 | } else if (strncmp(data, "SSTP_DUPLEX_POST", indx) == 0) { /* MS SSTP */
3323 | *type = MEDIA_CONTAINER_HTTP_REQUEST;
3324 | isHttpRequestOrReply = true1;
3325 | }
3326 | break;
3327 |
3328 | default:
3329 | break;
3330 | }
3331 |
3332 | if (isHttpRequestOrReply && reqresp_dissector) {
3333 | *reqresp_dissector = basic_request_dissector;
3334 |
3335 | stat_info->request_method = wmem_strndup(pinfo->pool, data, indx);
3336 | }
3337 |
3338 |
3339 |
3340 | }
3341 |
3342 | return isHttpRequestOrReply;
3343 | }
3344 |
3345 | /*
3346 | * Process headers.
3347 | */
3348 | typedef struct {
3349 | const char *name;
3350 | int *hf;
3351 | int special;
3352 | } header_info;
3353 |
3354 | #define HDR_NO_SPECIAL0 0
3355 | #define HDR_AUTHORIZATION1 1
3356 | #define HDR_AUTHENTICATE2 2
3357 | #define HDR_CONTENT_TYPE3 3
3358 | #define HDR_CONTENT_LENGTH4 4
3359 | #define HDR_CONTENT_ENCODING5 5
3360 | #define HDR_TRANSFER_ENCODING6 6
3361 | #define HDR_HOST7 7
3362 | #define HDR_UPGRADE8 8
3363 | #define HDR_COOKIE9 9
3364 | #define HDR_WEBSOCKET_PROTOCOL10 10
3365 | #define HDR_WEBSOCKET_EXTENSIONS11 11
3366 | #define HDR_REFERER12 12
3367 | #define HDR_LOCATION13 13
3368 | #define HDR_HTTP2_SETTINGS14 14
3369 | #define HDR_RANGE15 15
3370 | #define HDR_CONTENT_RANGE16 16
3371 |
3372 | static const header_info headers[] = {
3373 | { "Authorization", &hf_http_authorization, HDR_AUTHORIZATION1 },
3374 | { "Proxy-Authorization", &hf_http_proxy_authorization, HDR_AUTHORIZATION1 },
3375 | { "Proxy-Authenticate", &hf_http_proxy_authenticate, HDR_AUTHENTICATE2 },
3376 | { "WWW-Authenticate", &hf_http_www_authenticate, HDR_AUTHENTICATE2 },
3377 | { "Content-Type", &hf_http_content_type, HDR_CONTENT_TYPE3 },
3378 | { "Content-Length", &hf_http_content_length_header, HDR_CONTENT_LENGTH4 },
3379 | { "Content-Encoding", &hf_http_content_encoding, HDR_CONTENT_ENCODING5 },
3380 | { "Transfer-Encoding", &hf_http_transfer_encoding, HDR_TRANSFER_ENCODING6 },
3381 | { "Upgrade", &hf_http_upgrade, HDR_UPGRADE8 },
3382 | { "User-Agent", &hf_http_user_agent, HDR_NO_SPECIAL0 },
3383 | { "Host", &hf_http_host, HDR_HOST7 },
3384 | { "Range", &hf_http_range, HDR_RANGE15 },
3385 | { "Content-Range", &hf_http_content_range, HDR_CONTENT_RANGE16 },
3386 | { "Connection", &hf_http_connection, HDR_NO_SPECIAL0 },
3387 | { "Cookie", &hf_http_cookie, HDR_COOKIE9 },
3388 | { "Accept", &hf_http_accept, HDR_NO_SPECIAL0 },
3389 | { "Accept-Query", &hf_http_accept_query, HDR_NO_SPECIAL0 },
3390 | { "Referer", &hf_http_referer, HDR_REFERER12 },
3391 | { "Accept-Language", &hf_http_accept_language, HDR_NO_SPECIAL0 },
3392 | { "Accept-Encoding", &hf_http_accept_encoding, HDR_NO_SPECIAL0 },
3393 | { "Date", &hf_http_date, HDR_NO_SPECIAL0 },
3394 | { "Cache-Control", &hf_http_cache_control, HDR_NO_SPECIAL0 },
3395 | { "Server", &hf_http_server, HDR_NO_SPECIAL0 },
3396 | { "Location", &hf_http_location, HDR_LOCATION13 },
3397 | { "Sec-WebSocket-Accept", &hf_http_sec_websocket_accept, HDR_NO_SPECIAL0 },
3398 | { "Sec-WebSocket-Extensions", &hf_http_sec_websocket_extensions, HDR_WEBSOCKET_EXTENSIONS11 },
3399 | { "Sec-WebSocket-Key", &hf_http_sec_websocket_key, HDR_NO_SPECIAL0 },
3400 | { "Sec-WebSocket-Protocol", &hf_http_sec_websocket_protocol, HDR_WEBSOCKET_PROTOCOL10 },
3401 | { "Sec-WebSocket-Version", &hf_http_sec_websocket_version, HDR_NO_SPECIAL0 },
3402 | { "Set-Cookie", &hf_http_set_cookie, HDR_NO_SPECIAL0 },
3403 | { "Last-Modified", &hf_http_last_modified, HDR_NO_SPECIAL0 },
3404 | { "X-Forwarded-For", &hf_http_x_forwarded_for, HDR_NO_SPECIAL0 },
3405 | { "HTTP2-Settings", &hf_http_http2_settings, HDR_HTTP2_SETTINGS14 },
3406 | };
3407 |
3408 | /*
3409 | * Look up a header name (assume lower-case header_name).
3410 | */
3411 | static int*
3412 | get_hf_for_header(char* header_name)
3413 | {
3414 | int* hf_id = NULL((void*)0);
3415 |
3416 | if (header_fields_hash && header_name) {
3417 | hf_id = (int*) g_hash_table_lookup(header_fields_hash, header_name);
3418 | } else {
3419 | hf_id = NULL((void*)0);
3420 | }
3421 |
3422 | return hf_id;
3423 | }
3424 |
3425 | /*
3426 | *
3427 | */
3428 | static void
3429 | deregister_header_fields(void)
3430 | {
3431 | if (dynamic_hf) {
3432 | /* Deregister all fields */
3433 | for (unsigned i = 0; i < dynamic_hf_size; i++) {
3434 | proto_deregister_field (proto_http, *(dynamic_hf[i].p_id));
3435 | g_free (dynamic_hf[i].p_id)(__builtin_object_size ((dynamic_hf[i].p_id), 0) != ((size_t) - 1)) ? g_free_sized (dynamic_hf[i].p_id, __builtin_object_size ((dynamic_hf[i].p_id), 0)) : (g_free) (dynamic_hf[i].p_id);
3436 | }
3437 |
3438 | proto_add_deregistered_data (dynamic_hf);
3439 | dynamic_hf = NULL((void*)0);
3440 | dynamic_hf_size = 0;
3441 | }
3442 |
3443 | if (header_fields_hash) {
3444 | g_hash_table_destroy (header_fields_hash);
3445 | header_fields_hash = NULL((void*)0);
3446 | }
3447 | }
3448 |
3449 | static void
3450 | header_fields_post_update_cb(void)
3451 | {
3452 | int* hf_id;
3453 | char* header_name;
3454 | char* header_name_key;
3455 |
3456 | deregister_header_fields();
3457 |
3458 | if (num_header_fields) {
3459 | header_fields_hash = g_hash_table_new_full(g_str_hash, g_str_equal, g_free, NULL((void*)0));
3460 | dynamic_hf = g_new0(hf_register_info, num_header_fields)((hf_register_info *) g_malloc0_n ((num_header_fields), sizeof (hf_register_info)));
3461 | dynamic_hf_size = num_header_fields;
3462 |
3463 | for (unsigned i = 0; i < dynamic_hf_size; i++) {
3464 | hf_id = g_new(int,1)((int *) g_malloc_n ((1), sizeof (int)));
3465 | *hf_id = -1;
3466 | header_name = g_strdup(header_fields[i].header_name)g_strdup_inline (header_fields[i].header_name);
3467 | header_name_key = g_ascii_strdown(header_name, -1);
3468 |
3469 | dynamic_hf[i].p_id = hf_id;
3470 | dynamic_hf[i].hfinfo.name = header_name;
3471 | dynamic_hf[i].hfinfo.abbrev = ws_strdup_printf("http.header.%s", header_name)wmem_strdup_printf(((void*)0), "http.header.%s", header_name);
3472 | dynamic_hf[i].hfinfo.type = FT_STRING;
3473 | dynamic_hf[i].hfinfo.display = BASE_NONE;
3474 | dynamic_hf[i].hfinfo.strings = NULL((void*)0);
3475 | dynamic_hf[i].hfinfo.bitmask = 0;
3476 | dynamic_hf[i].hfinfo.blurb = g_strdup(header_fields[i].header_desc)g_strdup_inline (header_fields[i].header_desc);
3477 | HFILL_INIT(dynamic_hf[i])(dynamic_hf[i]).hfinfo.id = -1; (dynamic_hf[i]).hfinfo.parent = 0; (dynamic_hf[i]).hfinfo.ref_type = HF_REF_TYPE_NONE; (dynamic_hf [i]).hfinfo.same_name_prev_id = -1; (dynamic_hf[i]).hfinfo.same_name_next = ((void*)0);;
3478 |
3479 | g_hash_table_insert(header_fields_hash, header_name_key, hf_id);
3480 | }
3481 |
3482 | proto_register_field_array(proto_http, dynamic_hf, dynamic_hf_size);
3483 | }
3484 | }
3485 |
3486 | static void
3487 | header_fields_reset_cb(void)
3488 | {
3489 | deregister_header_fields();
3490 | }
3491 |
3492 | /**
3493 | * Parses the transfer-coding, returning true if everything was fully understood
3494 | * or false when unknown names were encountered.
3495 | */
3496 | static bool_Bool
3497 | http_parse_transfer_coding(const char *value, headers_t *eh_ptr)
3498 | {
3499 | bool_Bool is_fully_parsed = true1;
3500 |
3501 | /* Mark header as set, but with unknown encoding. */
3502 | eh_ptr->transfer_encoding = HTTP_TE_UNKNOWN;
3503 |
3504 | while (*value) {
3505 | /* skip OWS (SP / HTAB) and commas; stop at the end. */
3506 | while (*value == ' ' || *value == '\t' || *value == ',')
3507 | value++;
3508 | if (!*value)
3509 | break;
3510 |
3511 | if (g_str_has_prefix(value, "chunked")(__builtin_constant_p ("chunked")? __extension__ ({ const char * const __str = (value); const char * const __prefix = ("chunked" ); gboolean __result = (0); if (__str == ((void*)0) || __prefix == ((void*)0)) __result = (g_str_has_prefix) (__str, __prefix ); else { const size_t __str_len = strlen (((__str) + !(__str ))); const size_t __prefix_len = strlen (((__prefix) + !(__prefix ))); if (__str_len >= __prefix_len) __result = memcmp (((__str ) + !(__str)), ((__prefix) + !(__prefix)), __prefix_len) == 0 ; } __result; }) : (g_str_has_prefix) (value, "chunked") )) {
3512 | eh_ptr->transfer_encoding_chunked = true1;
3513 | value += sizeof("chunked") - 1;
3514 | continue;
3515 | }
3516 |
3517 | /* For now assume that chunked can only combined with exactly
3518 | * one other (compression) encoding. Anything else is
3519 | * unsupported. */
3520 | if (eh_ptr->transfer_encoding != HTTP_TE_UNKNOWN) {
3521 | /* No more transfer codings are expected. */
3522 | is_fully_parsed = false0;
3523 | break;
3524 | }
3525 |
3526 | if (g_str_has_prefix(value, "compress")(__builtin_constant_p ("compress")? __extension__ ({ const char * const __str = (value); const char * const __prefix = ("compress" ); gboolean __result = (0); if (__str == ((void*)0) || __prefix == ((void*)0)) __result = (g_str_has_prefix) (__str, __prefix ); else { const size_t __str_len = strlen (((__str) + !(__str ))); const size_t __prefix_len = strlen (((__prefix) + !(__prefix ))); if (__str_len >= __prefix_len) __result = memcmp (((__str ) + !(__str)), ((__prefix) + !(__prefix)), __prefix_len) == 0 ; } __result; }) : (g_str_has_prefix) (value, "compress") )) {
3527 | eh_ptr->transfer_encoding = HTTP_TE_COMPRESS;
3528 | value += sizeof("compress") - 1;
3529 | } else if (g_str_has_prefix(value, "deflate")(__builtin_constant_p ("deflate")? __extension__ ({ const char * const __str = (value); const char * const __prefix = ("deflate" ); gboolean __result = (0); if (__str == ((void*)0) || __prefix == ((void*)0)) __result = (g_str_has_prefix) (__str, __prefix ); else { const size_t __str_len = strlen (((__str) + !(__str ))); const size_t __prefix_len = strlen (((__prefix) + !(__prefix ))); if (__str_len >= __prefix_len) __result = memcmp (((__str ) + !(__str)), ((__prefix) + !(__prefix)), __prefix_len) == 0 ; } __result; }) : (g_str_has_prefix) (value, "deflate") )) {
3530 | eh_ptr->transfer_encoding = HTTP_TE_DEFLATE;
3531 | value += sizeof("deflate") - 1;
3532 | } else if (g_str_has_prefix(value, "gzip")(__builtin_constant_p ("gzip")? __extension__ ({ const char * const __str = (value); const char * const __prefix = ("gzip" ); gboolean __result = (0); if (__str == ((void*)0) || __prefix == ((void*)0)) __result = (g_str_has_prefix) (__str, __prefix ); else { const size_t __str_len = strlen (((__str) + !(__str ))); const size_t __prefix_len = strlen (((__prefix) + !(__prefix ))); if (__str_len >= __prefix_len) __result = memcmp (((__str ) + !(__str)), ((__prefix) + !(__prefix)), __prefix_len) == 0 ; } __result; }) : (g_str_has_prefix) (value, "gzip") )) {
3533 | eh_ptr->transfer_encoding = HTTP_TE_GZIP;
3534 | value += sizeof("gzip") - 1;
3535 | } else if (g_str_has_prefix(value, "identity")(__builtin_constant_p ("identity")? __extension__ ({ const char * const __str = (value); const char * const __prefix = ("identity" ); gboolean __result = (0); if (__str == ((void*)0) || __prefix == ((void*)0)) __result = (g_str_has_prefix) (__str, __prefix ); else { const size_t __str_len = strlen (((__str) + !(__str ))); const size_t __prefix_len = strlen (((__prefix) + !(__prefix ))); if (__str_len >= __prefix_len) __result = memcmp (((__str ) + !(__str)), ((__prefix) + !(__prefix)), __prefix_len) == 0 ; } __result; }) : (g_str_has_prefix) (value, "identity") )) {
3536 | eh_ptr->transfer_encoding = HTTP_TE_IDENTITY;
3537 | value += sizeof("identity") - 1;
3538 | } else if (g_str_has_prefix(value, "x-compress")(__builtin_constant_p ("x-compress")? __extension__ ({ const char * const __str = (value); const char * const __prefix = ("x-compress" ); gboolean __result = (0); if (__str == ((void*)0) || __prefix == ((void*)0)) __result = (g_str_has_prefix) (__str, __prefix ); else { const size_t __str_len = strlen (((__str) + !(__str ))); const size_t __prefix_len = strlen (((__prefix) + !(__prefix ))); if (__str_len >= __prefix_len) __result = memcmp (((__str ) + !(__str)), ((__prefix) + !(__prefix)), __prefix_len) == 0 ; } __result; }) : (g_str_has_prefix) (value, "x-compress") )) {
3539 | eh_ptr->transfer_encoding = HTTP_TE_COMPRESS;
3540 | value += sizeof("x-compress") - 1;
3541 | } else if (g_str_has_prefix(value, "x-gzip")(__builtin_constant_p ("x-gzip")? __extension__ ({ const char * const __str = (value); const char * const __prefix = ("x-gzip" ); gboolean __result = (0); if (__str == ((void*)0) || __prefix == ((void*)0)) __result = (g_str_has_prefix) (__str, __prefix ); else { const size_t __str_len = strlen (((__str) + !(__str ))); const size_t __prefix_len = strlen (((__prefix) + !(__prefix ))); if (__str_len >= __prefix_len) __result = memcmp (((__str ) + !(__str)), ((__prefix) + !(__prefix)), __prefix_len) == 0 ; } __result; }) : (g_str_has_prefix) (value, "x-gzip") )) {
3542 | eh_ptr->transfer_encoding = HTTP_TE_GZIP;
3543 | value += sizeof("x-gzip") - 1;
3544 | } else {
3545 | /* Unknown transfer encoding, skip until next comma.
3546 | * Stop when no more names are found. */
3547 | is_fully_parsed = false0;
3548 | value = strchr(value, ',');
3549 | if (!value)
3550 | break;
3551 | }
3552 | }
3553 |
3554 | return is_fully_parsed;
3555 | }
3556 |
3557 | static bool_Bool
3558 | is_token_char(char c)
3559 | {
3560 | /* tchar according to https://tools.ietf.org/html/rfc7230#section-3.2.6 */
3561 | return strchr("!#$%&\\:*+-.^_`|~", c) || g_ascii_isalnum(c)((g_ascii_table[(guchar) (c)] & G_ASCII_ALNUM) != 0);
3562 | }
3563 |
3564 | static bool_Bool
3565 | valid_header_name(const unsigned char *line, unsigned header_len)
3566 | {
3567 |
3568 | /*
3569 | * Validate the header name. This allows no space between the field name
3570 | * and colon (RFC 7230, Section. 3.2.4).
3571 | */
3572 | if (header_len == 0) {
3573 | return false0;
3574 | }
3575 | for (unsigned i = 0; i < header_len; i++) {
3576 | /*
3577 | * NUL is not a valid character; treat it specially
3578 | * due to C's notion that strings are NUL-terminated.
3579 | */
3580 | if (line[i] == '\0') {
3581 | return false0;
3582 | }
3583 | if (!is_token_char(line[i])) {
3584 | return false0;
3585 | }
3586 | }
3587 | return true1;
3588 | }
3589 |
3590 | static bool_Bool
3591 | invalid_header_value_char(uint8_t c)
3592 | {
3593 | /* NUL is not allowed in field values. */
3594 | return c == '\0';
3595 | }
3596 |
3597 | static bool_Bool
3598 | process_header(tvbuff_t *tvb, unsigned offset, unsigned next_offset,
3599 | const unsigned char *line, unsigned linelen, unsigned colon_offset,
3600 | packet_info *pinfo, proto_tree *tree, headers_t *eh_ptr,
3601 | http_conv_t *conv_data, media_container_type_t http_type, wmem_map_t *header_value_map,
3602 | wmem_allocator_t *header_value_map_allocator, bool_Bool streaming_chunk_mode)
3603 | {
3604 | unsigned len;
3605 | unsigned line_end_offset;
3606 | unsigned header_len;
3607 | int hf_index;
3608 | unsigned char c;
3609 | unsigned value_offset;
3610 | unsigned value_len, value_bytes_len;
3611 | uint8_t *value_bytes;
3612 | char *value;
3613 | char *header_name;
3614 | char *p;
3615 | unsigned char *up;
3616 | proto_item *hdr_item = NULL((void*)0), *it;
3617 | unsigned f;
3618 | bool_Bool header_name_trailing_ws;
3619 | bool_Bool header_value_bad_char;
3620 | int* hf_id;
3621 | tap_credential_t* auth;
3622 | http_req_res_t *curr_req_res = (http_req_res_t *)p_get_proto_data(wmem_file_scope(), pinfo,
3623 | proto_http, HTTP_PROTO_DATA_REQRES0);
3624 | http_info_value_t *stat_info = p_get_proto_data(pinfo->pool, pinfo, proto_http, HTTP_PROTO_DATA_INFO1);
3625 | wmem_allocator_t *scope = (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited) && streaming_chunk_mode) ? wmem_file_scope() :
3626 | ((PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited) && streaming_chunk_mode) ? NULL((void*)0) : pinfo->pool);
3627 |
3628 | len = next_offset - offset;
3629 | line_end_offset = offset + linelen;
3630 | header_len = colon_offset - offset;
3631 | header_name_trailing_ws = header_len > 0 &&
3632 | (line[header_len - 1] == ' ' || line[header_len - 1] == '\t');
3633 | header_value_bad_char = false0;
3634 |
3635 | /**
3636 | * Not a valid header name? Just add a line plus expert info.
3637 | */
3638 | if (!valid_header_name(line, header_len)) {
3639 | if (http_check_ascii_headers) {
3640 | /* If we're offering the chance for other dissectors to parse,
3641 | * we shouldn't add any tree items ourselves.
3642 | */
3643 | return false0;
3644 | }
3645 | if (http_type == MEDIA_CONTAINER_HTTP_REQUEST) {
3646 | hf_index = hf_http_request_line;
3647 | } else if (http_type == MEDIA_CONTAINER_HTTP_RESPONSE) {
3648 | hf_index = hf_http_response_line;
3649 | } else {
3650 | hf_index = hf_http_unknown_header;
3651 | }
3652 | it = proto_tree_add_item(tree, hf_index, tvb, offset, len, ENC_NA0x00000000|ENC_ASCII0x00000000);
3653 | proto_item_set_text(it, "%s", format_text(pinfo->pool, (char*)line, len));
3654 | expert_add_info(pinfo, it, &ei_http_bad_header_name);
3655 | if (header_name_trailing_ws) {
3656 | expert_add_info(pinfo, it, &ei_http_header_name_trailing_ws);
3657 | }
3658 | return false0;
3659 | }
3660 |
3661 | /*
3662 | * Make a null-terminated, all-lower-case version of the header
3663 | * name.
3664 | */
3665 | header_name = wmem_ascii_strdown(pinfo->pool, (const char*)&line[0], header_len);
3666 |
3667 | hf_index = find_header_hf_value(tvb, offset, header_len);
3668 |
3669 | /*
3670 | * Skip whitespace after the colon.
3671 | */
3672 | value_offset = colon_offset + 1;
3673 | while (value_offset < line_end_offset
3674 | && ((c = line[value_offset - offset]) == ' ' || c == '\t'))
3675 | value_offset++;
3676 |
3677 | /*
3678 | * Fetch the value.
3679 | *
3680 | * XXX - RFC 9110 5.5 "Specification for newly defined fields
3681 | * SHOULD limit their values to visible US-ASCII octets (VCHAR),
3682 | * SP, and HTAB. A recipient SHOULD treat other allowed octets in
3683 | * field content (i.e., obs-text [%x80-FF]) as opaque data...
3684 | * Field values containing CR, LF, or NUL characters are invalid
3685 | * and dangerous." (Up to RFC 7230, an obsolete "line-folding"
3686 | * mechanism that included CRLF was allowed.)
3687 | *
3688 | * So NUL is not allowed, and we should have one or more
3689 | * expert infos if the field value has anything other than
3690 | * ASCII printable + TAB. (Possibly different severities
3691 | * depending on whether it contains obsolete characters
3692 | * like \x80-\xFF vs characters never allowed like NUL.)
3693 | * All known field types respect this (using Base64, etc.)
3694 | * Unknown field types (possibly including those registered
3695 | * through the UAT) should be treated like FT_BYTES with
3696 | * BASE_SHOW_ASCII_PRINTABLE instead of FT_STRING, but it's
3697 | * more difficult to do that with the custom formatting
3698 | * that uses the header name.
3699 | *
3700 | * Instead, for now for display purposes we will treat strings
3701 | * as ASCII and pass the raw value to subdissectors via the
3702 | * header_value_map. For the latter, we allocate a buffer that's
3703 | * value_bytes_len+1 bytes long, copy value_bytes_len bytes, and
3704 | * stick in a NUL terminator, so that the buffer for value actually
3705 | * has value_bytes_len bytes in it.
3706 | */
3707 | value_bytes_len = line_end_offset - value_offset;
3708 | value_bytes = (uint8_t *)wmem_alloc(PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited) ? pinfo->pool : header_value_map_allocator, value_bytes_len+1);
3709 | memcpy(value_bytes, &line[value_offset - offset], value_bytes_len);
3710 | value_bytes[value_bytes_len] = '\0';
3711 | for (f = 0; f < value_bytes_len; f++) {
3712 | if (invalid_header_value_char(value_bytes[f])) {
3713 | header_value_bad_char = true1;
3714 | break;
3715 | }
3716 | }
3717 | value = (char*)tvb_get_string_enc(pinfo->pool, tvb, value_offset, value_bytes_len, ENC_ASCII0x00000000);
3718 | /* The length of the value might change after UTF-8 sanitization */
3719 | value_len = (int)strlen(value);
3720 |
3721 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) { /* Record header if packet was not visited yet */
3722 | wmem_map_insert(header_value_map, wmem_strdup(header_value_map_allocator, header_name), value_bytes);
3723 | }
3724 |
3725 | if (hf_index == -1) {
3726 | /*
3727 | * Not a header we know anything about.
3728 | * Check if a HF generated from UAT information exists.
3729 | */
3730 | hf_id = get_hf_for_header(header_name);
3731 |
3732 | if (tree) {
3733 | if (!hf_id) {
3734 | if (http_type == MEDIA_CONTAINER_HTTP_REQUEST ||
3735 | http_type == MEDIA_CONTAINER_HTTP_RESPONSE) {
3736 | hdr_item = proto_tree_add_item(tree,
3737 | http_type == MEDIA_CONTAINER_HTTP_RESPONSE ?
3738 | hf_http_response_line :
3739 | hf_http_request_line,
3740 | tvb, offset, len,
3741 | ENC_NA0x00000000|ENC_ASCII0x00000000);
3742 | proto_item_set_text(hdr_item, "%s",
3743 | format_text(pinfo->pool, (char*)line, len));
3744 | } else {
3745 | char* str = format_text(pinfo->pool, (char*)line, len);
3746 | hdr_item = proto_tree_add_string_format(tree, hf_http_unknown_header, tvb, offset,
3747 | len, str, "%s", str);
3748 | }
3749 |
3750 | } else {
3751 | hdr_item = proto_tree_add_string_format(tree,
3752 | *hf_id, tvb, offset, len, value,
3753 | "%s", format_text(pinfo->pool, (char*)line, len));
3754 | if (http_type == MEDIA_CONTAINER_HTTP_REQUEST ||
3755 | http_type == MEDIA_CONTAINER_HTTP_RESPONSE) {
3756 | it = proto_tree_add_item(tree,
3757 | http_type == MEDIA_CONTAINER_HTTP_RESPONSE ?
3758 | hf_http_response_line :
3759 | hf_http_request_line,
3760 | tvb, offset, len,
3761 | ENC_NA0x00000000|ENC_ASCII0x00000000);
3762 | proto_item_set_text(it, "%s",
3763 | format_text(pinfo->pool, (char*)line, len));
3764 | proto_item_set_hidden(it);
3765 | }
3766 | }
3767 | if (header_value_bad_char && hdr_item) {
3768 | expert_add_info(pinfo, hdr_item, &ei_http_bad_header_value_nul);
3769 | }
3770 | }
3771 | } else {
3772 | /*
3773 | * Add it to the protocol tree as a particular field,
3774 | * but display the line as is.
3775 | */
3776 | if (tree) {
3777 | header_field_info *hfinfo;
3778 | uint32_t tmp;
3779 |
3780 | hfinfo = proto_registrar_get_nth(*headers[hf_index].hf);
3781 | switch(hfinfo->type){
3782 | case FT_UINT8:
3783 | case FT_UINT16:
3784 | case FT_UINT24:
3785 | case FT_UINT32:
3786 | case FT_INT8:
3787 | case FT_INT16:
3788 | case FT_INT24:
3789 | case FT_INT32:
3790 | tmp=(uint32_t)strtol(value, NULL((void*)0), 10);
3791 | hdr_item = proto_tree_add_uint(tree, *headers[hf_index].hf, tvb, offset, len, tmp);
3792 | if (http_type == MEDIA_CONTAINER_HTTP_REQUEST ||
3793 | http_type == MEDIA_CONTAINER_HTTP_RESPONSE) {
3794 | it = proto_tree_add_item(tree,
3795 | http_type == MEDIA_CONTAINER_HTTP_RESPONSE ?
3796 | hf_http_response_line :
3797 | hf_http_request_line,
3798 | tvb, offset, len,
3799 | ENC_NA0x00000000|ENC_ASCII0x00000000);
3800 | proto_item_set_text(it, "%d", tmp);
3801 | proto_item_set_hidden(it);
3802 | }
3803 | break;
3804 | default:
3805 | hdr_item = proto_tree_add_string_format(tree,
3806 | *headers[hf_index].hf, tvb, offset, len,
3807 | value,
3808 | "%s", format_text(pinfo->pool, (char*)line, len));
3809 | if (http_type == MEDIA_CONTAINER_HTTP_REQUEST ||
3810 | http_type == MEDIA_CONTAINER_HTTP_RESPONSE) {
3811 | it = proto_tree_add_item(tree,
3812 | http_type == MEDIA_CONTAINER_HTTP_RESPONSE ?
3813 | hf_http_response_line :
3814 | hf_http_request_line,
3815 | tvb, offset, len,
3816 | ENC_NA0x00000000|ENC_ASCII0x00000000);
3817 | proto_item_set_text(it, "%s",
3818 | format_text(pinfo->pool, (char*)line, len));
3819 | proto_item_set_hidden(it);
3820 | }
3821 | }
3822 | } else
3823 | hdr_item = NULL((void*)0);
3824 |
3825 | if (header_value_bad_char && hdr_item) {
3826 | expert_add_info(pinfo, hdr_item, &ei_http_bad_header_value_nul);
3827 | }
3828 |
3829 | /*
3830 | * Do any special processing that particular headers
3831 | * require.
3832 | */
3833 | switch (headers[hf_index].special) {
3834 |
3835 | case HDR_AUTHORIZATION1:
3836 | if (check_auth_ntlmssp(hdr_item, tvb, pinfo, value))
3837 | break; /* dissected NTLMSSP */
3838 | if (check_auth_basic(hdr_item, tvb, pinfo, value))
3839 | break; /* dissected basic auth */
3840 | if (check_auth_citrixbasic(hdr_item, tvb, pinfo, value, offset))
3841 | break; /* dissected citrix basic auth */
3842 | if (check_auth_kerberos(hdr_item, tvb, pinfo, value))
3843 | break;
3844 | if (check_auth_digest(hdr_item, tvb, pinfo, value, offset, value_len))
3845 | break;/* dissected digest basic auth */
3846 | auth = wmem_new0(pinfo->pool, tap_credential_t)((tap_credential_t*)wmem_alloc0((pinfo->pool), sizeof(tap_credential_t )));
3847 | auth->num = pinfo->num;
3848 | auth->password_hf_id = *headers[hf_index].hf;
3849 | auth->proto = "HTTP header auth";
3850 | auth->username = wmem_strdup(pinfo->pool, CREDENTIALS_PLACEHOLDER"n.a.");
3851 | tap_queue_packet(credentials_tap, pinfo, auth);
3852 | break;
3853 |
3854 | case HDR_AUTHENTICATE2:
3855 | if (check_auth_ntlmssp(hdr_item, tvb, pinfo, value))
3856 | break; /* dissected NTLMSSP */
3857 | check_auth_kerberos(hdr_item, tvb, pinfo, value);
3858 | break;
3859 |
3860 | case HDR_CONTENT_TYPE3:
3861 | if (scope == NULL((void*)0)) { /* identical to (PINFO_FD_VISITED(pinfo) && streaming_chunk_mode) */
3862 | break; /* eh_ptr->content_type[_parameters] must have been set during first scan */
3863 | }
3864 | eh_ptr->content_type = wmem_strdup(scope, value);
3865 |
3866 | for (f = 0; f < value_len; f++) {
3867 | c = value[f];
3868 | if (c == ';' || g_ascii_isspace(c)((g_ascii_table[(guchar) (c)] & G_ASCII_SPACE) != 0)) {
3869 | /*
3870 | * End of subtype - either
3871 | * white space or a ";"
3872 | * separating the subtype from
3873 | * a parameter.
3874 | */
3875 | break;
3876 | }
3877 |
3878 | /*
3879 | * Map the character to lower case;
3880 | * content types are case-insensitive.
3881 | */
3882 | eh_ptr->content_type[f] = g_ascii_tolower(eh_ptr->content_type[f]);
3883 | }
3884 | eh_ptr->content_type[f] = '\0';
3885 | /*
3886 | * Now find the start of the optional parameters;
3887 | * skip the optional white space and the semicolon
3888 | * if this has not been done before.
3889 | */
3890 | f++;
3891 | while (f < value_len) {
3892 | c = eh_ptr->content_type[f];
3893 | if (c == ';' || g_ascii_isspace(c)((g_ascii_table[(guchar) (c)] & G_ASCII_SPACE) != 0))
3894 | /* Skip till start of parameters */
3895 | f++;
3896 | else
3897 | break;
3898 | }
3899 | if (f < value_len)
3900 | eh_ptr->content_type_parameters = eh_ptr->content_type + f;
3901 | else
3902 | eh_ptr->content_type_parameters = NULL((void*)0);
3903 | break;
3904 |
3905 | case HDR_CONTENT_LENGTH4:
3906 | DISSECTOR_ASSERT_HINT(!streaming_chunk_mode, "In streaming chunk mode, there will never be content-length header.")((void) ((!streaming_chunk_mode) ? (void)0 : (proto_report_dissector_bug ("%s:%u: failed assertion \"%s\" (%s)", "epan/dissectors/packet-http.c" , 3906, "!streaming_chunk_mode", "In streaming chunk mode, there will never be content-length header." ))));
3907 | errno(*__errno_location ()) = 0;
3908 | eh_ptr->content_length = g_ascii_strtoll(value, &p, 10);
3909 | up = (unsigned char *)p;
3910 | if (eh_ptr->content_length < 0 ||
3911 | p == value ||
3912 | errno(*__errno_location ()) == ERANGE34 ||
3913 | (*up != '\0' && !g_ascii_isspace(*up)((g_ascii_table[(guchar) (*up)] & G_ASCII_SPACE) != 0))) {
3914 | /*
3915 | * Content length not valid; pretend
3916 | * we don't have it.
3917 | */
3918 | eh_ptr->have_content_length = false0;
3919 | } else {
3920 | proto_tree *header_tree;
3921 | proto_item *tree_item;
3922 | /*
3923 | * We do have a valid content length.
3924 | */
3925 | eh_ptr->have_content_length = true1;
3926 | header_tree = proto_item_add_subtree(hdr_item, ett_http_header_item);
3927 | tree_item = proto_tree_add_uint64(header_tree, hf_http_content_length,
3928 | tvb, offset, len, eh_ptr->content_length);
3929 | proto_item_set_generated(tree_item);
3930 | if (eh_ptr->transfer_encoding != HTTP_TE_NONE) {
3931 | expert_add_info(pinfo, hdr_item, &ei_http_te_and_length);
3932 | }
3933 | }
3934 | break;
3935 |
3936 | case HDR_CONTENT_ENCODING5:
3937 | if (scope == NULL((void*)0)) { /* identical to (PINFO_FD_VISITED(pinfo) && streaming_chunk_mode) */
3938 | break; /* eh_ptr->content_encoding must have been set during first scan */
3939 | }
3940 | eh_ptr->content_encoding = wmem_strndup(scope, value, value_len);
3941 | break;
3942 |
3943 | case HDR_TRANSFER_ENCODING6:
3944 | if (eh_ptr->have_content_length) {
3945 | expert_add_info(pinfo, hdr_item, &ei_http_te_and_length);
3946 | }
3947 | if (!http_parse_transfer_coding(value, eh_ptr)) {
3948 | expert_add_info(pinfo, hdr_item, &ei_http_te_unknown);
3949 | }
3950 | break;
3951 |
3952 | case HDR_HOST7:
3953 | stat_info->http_host = wmem_strndup(pinfo->pool, value, value_len);
3954 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited) && curr_req_res) {
3955 | curr_req_res->http_host = wmem_strndup(wmem_file_scope(), value, value_len);
3956 | }
3957 | break;
3958 |
3959 | case HDR_UPGRADE8:
3960 | if (scope == NULL((void*)0)) { /* identical to (PINFO_FD_VISITED(pinfo) && streaming_chunk_mode) */
3961 | break;
3962 | }
3963 | eh_ptr->upgrade = wmem_ascii_strdown(scope, value, value_len);
3964 | break;
3965 |
3966 | case HDR_COOKIE9:
3967 | if (hdr_item) {
3968 | proto_tree *cookie_tree;
3969 | char *part, *part_end;
3970 | int part_len;
3971 |
3972 | cookie_tree = proto_item_add_subtree(hdr_item, ett_http_header_item);
3973 | for (f = 0; f < value_len; ) {
3974 | /* skip whitespace and ';' (terminates at '\0' or earlier) */
3975 | c = value[f];
3976 | while (c == ';' || g_ascii_isspace(c)((g_ascii_table[(guchar) (c)] & G_ASCII_SPACE) != 0))
3977 | c = value[++f];
3978 |
3979 | if (f >= value_len)
3980 | break;
3981 |
3982 | /* find "cookie=foo " in "cookie=foo ; bar" */
3983 | part = value + f;
3984 | part_end = (char *)memchr(part, ';', value_len - f);
3985 | if (part_end)
3986 | part_len =(int)(part_end - part);
3987 | else
3988 | part_len = value_len - f;
3989 |
3990 | /* finally add cookie to tree */
3991 | proto_tree_add_item(cookie_tree, hf_http_cookie_pair,
3992 | tvb, value_offset + f, part_len, ENC_ASCII0x00000000);
3993 | f += part_len;
3994 | }
3995 | }
3996 | break;
3997 |
3998 | case HDR_REFERER12:
3999 | stat_info->referer_uri = wmem_strndup(pinfo->pool, value, value_len);
4000 | break;
4001 |
4002 | case HDR_LOCATION13:
4003 | if (curr_req_res && curr_req_res->request_uri){
4004 | stat_info->location_target = wmem_strndup(pinfo->pool, value, value_len);
4005 | stat_info->location_base_uri = wmem_strdup(pinfo->pool, curr_req_res->full_uri);
4006 | }
4007 | break;
4008 | case HDR_HTTP2_SETTINGS14:
4009 | {
4010 | proto_tree* settings_tree = proto_item_add_subtree(hdr_item, ett_http_http2_settings_item);
4011 | tvbuff_t* new_tvb = base64uri_tvb_to_new_tvb(tvb, value_offset, value_bytes_len);
4012 | add_new_data_source(pinfo, new_tvb, "Base64uri decoded");
4013 | TRY{ except_t *volatile exc; volatile int except_state = 0; static const except_id_t catch_spec[] = { { 1, 0 } }; { struct except_stacknode except_sn; struct except_catch except_ch; except_setup_try(& except_sn, &except_ch, catch_spec, 1); if (_setjmp (except_ch .except_jmp)) *(&exc) = &except_ch.except_obj; else * (&exc) = 0; if(except_state & 1) except_state |= 2; except_state &= ~1; if (except_state == 0 && exc == 0){
4014 | dissect_http2_settings_ext(new_tvb, pinfo, settings_tree, 0);
4015 | } CATCH_ALLif (except_state == 0 && exc != 0 && (except_state |=1)){
4016 | show_exception(tvb, pinfo, settings_tree, EXCEPT_CODE((exc)->except_id.except_code), GET_MESSAGE((exc)->except_message));
4017 | }
4018 | ENDTRYif(!(except_state&1) && exc != 0) except_rethrow( exc); except_free(except_ch.except_obj.except_dyndata); except_pop (); };};
4019 |
4020 | break;
4021 | }
4022 | case HDR_RANGE15:
4023 | {
4024 | /* THIS IS A GET REQUEST
4025 | * Note: GET is the only method that employs ranges.
4026 | * (Unless the data has errors or is noncompliant.)
4027 | */
4028 | if (curr_req_res && !pinfo->fd->visited) {
4029 | /*
4030 | * Unlike protocols such as NFS and SMB, the HTTP protocol (RFC 9110) does not
4031 | * provide an identifier with which to match requests and responses. Instead,
4032 | * matching is solely based upon the order in which responses are received.
4033 | * HTTP I/O is 'asynchronously ordered' such that, for example, the first of four
4034 | * GET responses are matched with the first outstanding request, the next
4035 | * response with the second oldest outstanding request and so on (FIFO).
4036 | * The previous method instead matched responses with the last of several
4037 | * async requests rather than the first (LIFO), and did not handle requests
4038 | * with no responses such as the case where one or more HTTP packets were
4039 | * not captured. Whenever there were multiple outstanding requests, the SRT
4040 | * (RTT) stats were incorrect, in some cases massively so.
4041 | *
4042 | * While RFC 9110 expressly prohibits matching via byte ranges because, among
4043 | * other things, the server may return fewer bytes than requested,
4044 | * the first number of the range does not change. Unlike HTTP implementations,
4045 | * Wireshark has the problem of requests/responses missing from the capture
4046 | * file. In such cases resumption of correct matching was virtually impossible.
4047 | * In addition, all matching was incorrect from that point on.
4048 | *
4049 | * The method of matching used herein is able to recover from packet loss,
4050 | * any number of missing frames, and duplicate range requests. The
4051 | * method used is explained within the comments.
4052 | */
4053 | /* https://www.rfc-editor.org/rfc/rfc9110.html#name-range-requests
4054 | * Note that RFC 9110 16.5 defines a registry for
4055 | * range units, but only bytes are registered.
4056 | * ABNF:
4057 | * Range = ranges-specifier
4058 | * ranges-specifier = range-unit "=" range-set
4059 | * range-set = 1#range-spec
4060 | * range-spec = int-range / suffix-range / other-range
4061 | * 1# is an ABNF extension defined in RFC 9110 5.6.1
4062 | * which covers comma separated list with optional
4063 | * white space:
4064 | * 1#element => element *( OWS "," OWS element )
4065 | * We don't care about other-range, but will try to
4066 | * handle int-range and suffix-range.
4067 | * This ignores any entries past the first in a list,
4068 | * though responses to such would be multipart.
4069 | * As mentioned above, this breaks down if the
4070 | * response does not include all requested ranges
4071 | * fully in one response.
4072 | */
4073 | const char *pos = strchr(value, '=');
4074 | if (pos == NULL((void*)0)) {
4075 | break;
4076 | }
4077 | pos++;
4078 | uint64_t first_range_num = 0;
4079 | /* Get the first range number */
4080 | ws_strtou64(pos, &pos, &first_range_num);
4081 | /* If the first number of the range is missing or '0',
4082 | * use the second number in the range instead if we can.
4083 | * XXX - Unlike strtoul, we can check the return value
4084 | * of ws_strtou64() to distinguish between "converted
4085 | * successfully as 0" and "failed conversion."
4086 | * Note that strtoul allows an unsigned integer to
4087 | * begin with a negative sign and applies unsigned
4088 | * integer wraparound rules.
4089 | * ws_strtouXX rejects an initial hyphen-minus, which
4090 | * is good, as we want to properly handle:
4091 | * suffix-range = "-" suffix-length
4092 | */
4093 | if (first_range_num == 0 && *pos == '-') {
4094 | pos++;
4095 | /* Pass in an end pointer to convert
4096 | * a list of ranges, the first of which is
4097 | * a suffix-range.
4098 | */
4099 | ws_strtou64(pos, &pos, &first_range_num);
4100 | }
4101 | /* req_list is used for req/resp matching and the deletion (and freeing) of matching
4102 | * requests and any orphans that precede them. A GSList is used instead of a wmem map
4103 | * because there are rarely more than 10 requests in the list."
4104 | */
4105 | if (first_range_num > 0) {
4106 | request_trans_t* req_trans = wmem_new(wmem_file_scope(), request_trans_t)((request_trans_t*)wmem_alloc((wmem_file_scope()), sizeof(request_trans_t )));
4107 | req_trans->first_range_num = first_range_num;
4108 | req_trans->req_frame = pinfo->num;
4109 | req_trans->abs_time = pinfo->fd->abs_ts;
4110 | req_trans->request_uri = curr_req_res->request_uri;
4111 |
4112 | wmem_list_append(conv_data->req_list, req_trans);
4113 | curr_req_res->req_has_range = true1;
4114 | }
4115 | }
4116 |
4117 | break;
4118 | }
4119 | case HDR_CONTENT_RANGE16:
4120 | /*
4121 | * THIS IS A GET RESPONSE
4122 | * GET is the only method that employs ranges.
4123 | * XXX - Except that RFC 9110 14.4 & 14.5 note that by
4124 | * private agreement it can be included in a request
4125 | * to request a partial PUT.
4126 | * ABNF:
4127 | * Content-Range = range-unit SP ( range-resp / unsatisfied-range )
4128 | * range-resp = incl-range "/" ( complete-length / "*" )
4129 | * We do not attempt to handle unsatisfied-range.
4130 | * Note that only one range can be included; multiple
4131 | * ranges are transmitted with the media type of
4132 | * "multipart/byteranges" and each body part contains
4133 | * its own Content-Type and Content-Range fields.
4134 | * The multipart dissector does not handle this nor
4135 | * access the request list.
4136 | */
4137 | if (curr_req_res && !pinfo->fd->visited) {
4138 | request_trans_t *req_trans;
4139 | match_trans_t *match_trans = NULL((void*)0);
4140 | nstime_t ns;
4141 | wmem_list_frame_t *frame;
4142 |
4143 | /* Note SP instead of '=' in ABNF. */
4144 | const char *pos = strchr(value, ' ');
4145 | if (pos == NULL((void*)0)) {
4146 | break;
4147 | }
4148 | pos++;
4149 | uint64_t first_crange_num = 0;
4150 | /* Get the first content range number */
4151 | ws_strtou64(pos, &pos, &first_crange_num);
4152 |
4153 | if (first_crange_num == 0 && *pos == '-') {
4154 | pos++;
4155 | ws_strtou64(pos, &pos, &first_crange_num);
4156 | }
4157 |
4158 | /* Get the position of the matching request if any in the reqs_table.
4159 | * This is used to remove and free the matching request, and the unmatched
4160 | * requests (orphans) that precede it.
4161 | * XXX - There is *NO* guarantee that there is
4162 | * a perfectly matching request, see 15.3.7:
4163 | * "However, a server might want to send only a
4164 | * subset of the data requested for reasons of
4165 | * its own... A client MUST inspect a 206
4166 | * response's Content-Type and Content-Range
4167 | * field(s) to determine what parts are enclosed
4168 | * and whether additional requests are needed."
4169 | * Also 15.3.7.2 Multiple Parts, noting that
4170 | * the response may be sent in a Content-Type
4171 | * multipart/byteranges, also "When multiple
4172 | * ranges are requested, a server MAY coalesce
4173 | * any of the ranges that overlap, or that are
4174 | * separated by a gap that is smaller than the
4175 | * overhead of sending multiple parts, regardless
4176 | * of the order in which the corresponding range-
4177 | * spec appeared in the received Range header
4178 | * field." and 15.3.7.3 Combining Parts.
4179 | * However, as mentioned above, the LIFO method
4180 | * had issues with that as well. Truly proper
4181 | * handling of such edge cases is more difficult.
4182 | */
4183 | req_trans = NULL((void*)0);
4184 | for (frame = wmem_list_head(conv_data->req_list);
4185 | frame; frame = wmem_list_frame_next(frame)) {
4186 |
4187 | request_trans_t* frame_req_trans = wmem_list_frame_data(frame);
4188 | if (frame_req_trans->first_range_num == first_crange_num) {
4189 | req_trans = frame_req_trans;
4190 | break;
4191 | }
4192 | }
4193 |
4194 | if (first_crange_num != 0 && req_trans) {
4195 | match_trans = wmem_new(wmem_file_scope(), match_trans_t)((match_trans_t*)wmem_alloc((wmem_file_scope()), sizeof(match_trans_t )));
4196 | match_trans->req_frame = req_trans->req_frame;
4197 | match_trans->resp_frame = pinfo->num;
4198 | nstime_delta(&ns, &pinfo->fd->abs_ts, &req_trans->abs_time);
4199 | match_trans->delta_time = ns;
4200 | match_trans->request_uri = req_trans->request_uri;
4201 | match_trans->http_host = curr_req_res->http_host;
4202 |
4203 | wmem_map_insert(conv_data->matches_table,
4204 | GUINT_TO_POINTER(match_trans->req_frame)((gpointer) (gulong) (match_trans->req_frame)), (void *)match_trans);
4205 | wmem_map_insert(conv_data->matches_table,
4206 | GUINT_TO_POINTER(match_trans->resp_frame)((gpointer) (gulong) (match_trans->resp_frame)), (void *)match_trans);
4207 |
4208 | /* Remove and free all of the list entries up to and including the
4209 | * matching one from req_list. */
4210 | while ((frame = wmem_list_head(conv_data->req_list))) {
4211 |
4212 | if (wmem_list_frame_data(frame) == req_trans) {
4213 | wmem_list_remove_frame(conv_data->req_list, frame);
4214 | break;
4215 | }
4216 | wmem_list_remove_frame(conv_data->req_list, frame);
4217 | }
4218 | }
4219 | }
4220 | if (curr_req_res)
4221 | curr_req_res->resp_has_range = true1;
4222 | break;
4223 | }
4224 | }
4225 | return true1;
4226 | }
4227 |
4228 | /* Returns index of header tag in headers */
4229 | static int
4230 | find_header_hf_value(tvbuff_t *tvb, unsigned offset, unsigned header_len)
4231 | {
4232 | unsigned i;
4233 |
4234 | for (i = 0; i < array_length(headers)(sizeof (headers) / sizeof (headers)[0]); i++) {
4235 | if (header_len == strlen(headers[i].name) &&
4236 | tvb_strncaseeql(tvb, offset,
4237 | headers[i].name, header_len) == 0)
4238 | return i;
4239 | }
4240 |
4241 | return -1;
4242 | }
4243 |
4244 | /*
4245 | * Dissect Microsoft's abomination called NTLMSSP over HTTP.
4246 | */
4247 | static bool_Bool
4248 | check_auth_ntlmssp(proto_item *hdr_item, tvbuff_t *tvb, packet_info *pinfo, char *value)
4249 | {
4250 | static const char *ntlm_headers[] = {
4251 | "NTLM ",
4252 | "Negotiate ",
4253 | NULL((void*)0)
4254 | };
4255 | const char **header;
4256 | size_t hdrlen;
4257 | proto_tree *hdr_tree;
4258 |
4259 | /*
4260 | * Check for NTLM credentials and challenge; those can
4261 | * occur with WWW-Authenticate.
4262 | */
4263 | for (header = &ntlm_headers[0]; *header != NULL((void*)0); header++) {
4264 | hdrlen = strlen(*header);
4265 | if (strncmp(value, *header, hdrlen) == 0) {
4266 | hdr_tree = proto_item_add_subtree(hdr_item,
4267 | ett_http_ntlmssp);
4268 | value += hdrlen;
4269 | dissect_http_ntlmssp(tvb, pinfo, hdr_tree, value);
4270 | return true1;
4271 | }
4272 | }
4273 | return false0;
4274 | }
4275 |
4276 | static tap_credential_t*
4277 | basic_auth_credentials(wmem_allocator_t *scope, const char* str)
4278 | {
4279 | char **tokens = g_strsplit(str, ":", -1);
4280 |
4281 | if (!tokens || !tokens[0] || !tokens[1]) {
4282 | g_strfreev(tokens);
4283 | return NULL((void*)0);
4284 | }
4285 |
4286 | tap_credential_t* auth = wmem_new0(scope, tap_credential_t)((tap_credential_t*)wmem_alloc0((scope), sizeof(tap_credential_t )));
4287 |
4288 | auth->username = wmem_strdup(scope, tokens[0]);
4289 | auth->proto = "HTTP basic auth";
4290 |
4291 | g_strfreev(tokens);
4292 |
4293 | return auth;
4294 | }
4295 |
4296 | /*
4297 | * Dissect HTTP Basic authorization.
4298 | */
4299 | static bool_Bool
4300 | check_auth_basic(proto_item *hdr_item, tvbuff_t *tvb, packet_info *pinfo, char *value)
4301 | {
4302 | static const char *basic_headers[] = {
4303 | "Basic ",
4304 | NULL((void*)0)
4305 | };
4306 | const char **header;
4307 | size_t hdrlen;
4308 | const char *decoded_value;
4309 | proto_tree *hdr_tree;
4310 | tvbuff_t *auth_tvb;
4311 |
4312 | for (header = &basic_headers[0]; *header != NULL((void*)0); header++) {
4313 | hdrlen = strlen(*header);
4314 | if (strncmp(value, *header, hdrlen) == 0) {
4315 | hdr_tree = proto_item_add_subtree(hdr_item,
4316 | ett_http_ntlmssp);
4317 | value += hdrlen;
4318 |
4319 | auth_tvb = base64_to_tvb(tvb, value);
4320 | add_new_data_source(pinfo, auth_tvb, "Basic Credentials");
4321 | /* RFC 7617 says that the character encoding is only
4322 | * known to be UTF-8 if the 'charset' parameter was
4323 | * used. Otherwise, after Base64 decoding it could be
4324 | * any character encoding.
4325 | * XXX: Perhaps the field should be a FT_BYTES with
4326 | * BASE_SHOW_UTF_8_PRINTABLE?
4327 | */
4328 | proto_tree_add_item_ret_string(hdr_tree, hf_http_basic, auth_tvb, 0, tvb_reported_length(auth_tvb), ENC_UTF_80x00000002, pinfo->pool, (const uint8_t**)&decoded_value);
4329 | tap_credential_t* auth = basic_auth_credentials(pinfo->pool, decoded_value);
4330 | if (auth) {
4331 | auth->num = auth->username_num = pinfo->num;
4332 | auth->password_hf_id = hf_http_basic;
4333 | tap_queue_packet(credentials_tap, pinfo, auth);
4334 | }
4335 |
4336 | return true1;
4337 | }
4338 | }
4339 | return false0;
4340 | }
4341 |
4342 | /*
4343 | * Dissect HTTP Digest authorization.
4344 | */
4345 | static bool_Bool
4346 | check_auth_digest(proto_item* hdr_item, tvbuff_t* tvb, packet_info* pinfo _U___attribute__((unused)), char* value, unsigned offset, unsigned len)
4347 | {
4348 | proto_tree* hdr_tree;
4349 | unsigned queried_offset;
4350 |
4351 | if (strncmp(value, "Digest", 6) == 0) {
4352 | hdr_tree = proto_item_add_subtree(hdr_item, ett_http_ntlmssp);
4353 | tvbuff_t *digest_tvb = tvb_new_subset_length(tvb, offset, len);
4354 | offset = 21; // strlen("Authorization: Digest");
4355 | while (tvb_captured_length_remaining(digest_tvb, offset)) {
4356 | /* Find comma/end of line */
4357 | tvb_find_uint8_remaining(digest_tvb, offset, ',', &queried_offset);
4358 | proto_tree_add_format_text(hdr_tree, digest_tvb, offset, queried_offset - offset);
4359 | offset = queried_offset + 1;
4360 | }
4361 | return true1;
4362 | } else {
4363 | return false0;
4364 | }
4365 | }
4366 | /*
4367 | * Dissect HTTP CitrixAGBasic authorization.
4368 | */
4369 | static bool_Bool
4370 | check_auth_citrixbasic(proto_item *hdr_item, tvbuff_t *tvb, packet_info *pinfo, char *value, unsigned offset)
4371 | {
4372 | static const char *basic_headers[] = {
4373 | "CitrixAGBasic ",
4374 | NULL((void*)0)
4375 | };
4376 | const char **header;
4377 | size_t hdrlen;
4378 | proto_tree *hdr_tree;
4379 | char *ch_ptr;
4380 | unsigned data_len;
4381 | tvbuff_t *data_tvb;
4382 | proto_item *hidden_item;
4383 | proto_item *pi;
4384 | const uint8_t *user = NULL((void*)0), *passwd = NULL((void*)0);
4385 |
4386 | for (header = &basic_headers[0]; *header != NULL((void*)0); header++) {
4387 | hdrlen = strlen(*header);
4388 | if (strncmp(value, *header, hdrlen) == 0) {
4389 | hdr_tree = proto_item_add_subtree(hdr_item,
4390 | ett_http_ntlmssp);
4391 | value += hdrlen;
4392 | offset += (unsigned)hdrlen + 15;
4393 | hidden_item = proto_tree_add_boolean(hdr_tree,
4394 | hf_http_citrix, tvb, 0, 0, 1);
4395 | proto_item_set_hidden(hidden_item);
4396 |
4397 | if(strncmp(value, "username=\"", 10) == 0) {
4398 | value += 10;
4399 | offset += 10;
4400 | ch_ptr = strchr(value, '"');
4401 | if ( ch_ptr != NULL((void*)0) ) {
4402 | data_len = (unsigned)(ch_ptr - value);
4403 | if (data_len) {
4404 | data_tvb = base64_tvb_to_new_tvb(tvb, offset, data_len);
4405 | add_new_data_source(pinfo, data_tvb, "Username");
4406 | /* XXX: We don't know for certain the string encoding here. */
4407 | pi = proto_tree_add_item_ret_string(hdr_tree, hf_http_citrix_user, data_tvb, 0, tvb_reported_length(data_tvb), ENC_UTF_80x00000002, pinfo->pool, &user);
4408 | } else {
4409 | pi = proto_tree_add_string(hdr_tree, hf_http_citrix_user, tvb, offset, 0, "");
4410 | }
4411 | proto_item_set_generated(pi);
4412 | value += data_len + 1;
4413 | offset += data_len + 1;
4414 | }
4415 | }
4416 | if(strncmp(value, "; domain=\"", 10) == 0) {
4417 | value += 10;
4418 | offset += 10;
4419 | ch_ptr = strchr(value, '"');
4420 | if ( ch_ptr != NULL((void*)0) ) {
4421 | data_len = (unsigned)(ch_ptr - value);
4422 | if (data_len) {
4423 | data_tvb = base64_tvb_to_new_tvb(tvb, offset, data_len);
4424 | add_new_data_source(pinfo, data_tvb, "Domain");
4425 | pi = proto_tree_add_item(hdr_tree, hf_http_citrix_domain, data_tvb, 0, tvb_reported_length(data_tvb), ENC_UTF_80x00000002);
4426 | } else {
4427 | pi = proto_tree_add_string(hdr_tree, hf_http_citrix_domain, tvb, offset, 0, "");
4428 | }
4429 | proto_item_set_generated(pi);
4430 | value += data_len + 1;
4431 | offset += data_len + 1;
4432 | }
4433 | }
4434 | if(strncmp(value, "; password=\"", 12) == 0) {
4435 | value += 12;
4436 | offset += 12;
4437 | ch_ptr = strchr(value, '"');
4438 | if ( ch_ptr != NULL((void*)0) ) {
4439 | data_len = (unsigned)(ch_ptr - value);
4440 | if (data_len) {
4441 | data_tvb = base64_tvb_to_new_tvb(tvb, offset, data_len);
4442 | add_new_data_source(pinfo, data_tvb, "Password");
4443 | pi = proto_tree_add_item_ret_string(hdr_tree, hf_http_citrix_passwd, data_tvb, 0, tvb_reported_length(data_tvb), ENC_UTF_80x00000002, pinfo->pool, &passwd);
4444 | } else {
4445 | pi = proto_tree_add_string(hdr_tree, hf_http_citrix_passwd, tvb, offset, 0, "");
4446 | }
4447 | proto_item_set_generated(pi);
4448 | value += data_len + 1;
4449 | offset += data_len + 1;
4450 | }
4451 | }
4452 | if(strncmp(value, "; AGESessionId=\"", 16) == 0) {
4453 | value += 16;
4454 | offset += 16;
4455 | ch_ptr = strchr(value, '"');
4456 | if ( ch_ptr != NULL((void*)0) ) {
4457 | data_len = (unsigned)(ch_ptr - value);
4458 | if (data_len) {
4459 | data_tvb = base64_tvb_to_new_tvb(tvb, offset, data_len);
4460 | add_new_data_source(pinfo, data_tvb, "Session ID");
4461 | pi = proto_tree_add_item(hdr_tree, hf_http_citrix_session, data_tvb, 0, tvb_reported_length(data_tvb), ENC_UTF_80x00000002);
4462 | } else {
4463 | pi = proto_tree_add_string(hdr_tree, hf_http_citrix_session, tvb,
4464 | offset, 0, "");
4465 | }
4466 | proto_item_set_generated(pi);
4467 | }
4468 | }
4469 | if (user != NULL((void*)0) && passwd != NULL((void*)0)) {
4470 |
4471 | tap_credential_t* auth = wmem_new0(pinfo->pool, tap_credential_t)((tap_credential_t*)wmem_alloc0((pinfo->pool), sizeof(tap_credential_t )));
4472 |
4473 | auth->username = wmem_strdup(pinfo->pool, (char*)user);
4474 | auth->proto = "HTTP CitrixAGBasic auth";
4475 | auth->num = auth->username_num = pinfo->num;
4476 | auth->password_hf_id = hf_http_citrix_passwd;
4477 | tap_queue_packet(credentials_tap, pinfo, auth);
4478 | }
4479 | return true1;
4480 | }
4481 | }
4482 | return false0;
4483 | }
4484 |
4485 | static bool_Bool
4486 | check_auth_kerberos(proto_item *hdr_item, tvbuff_t *tvb, packet_info *pinfo, const char *value)
4487 | {
4488 | proto_tree *hdr_tree;
4489 |
4490 | if (strncmp(value, "Kerberos ", 9) == 0) {
4491 | hdr_tree = proto_item_add_subtree(hdr_item, ett_http_kerberos);
4492 | dissect_http_kerberos(tvb, pinfo, hdr_tree, value);
4493 | return true1;
4494 | }
4495 | return false0;
4496 | }
4497 |
4498 | static int
4499 | dissect_http_on_stream(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
4500 | http_conv_t *conv_data, bool_Bool end_of_stream, const uint32_t *seq)
4501 | {
4502 | unsigned offset = 0;
4503 | int len = 0;
4504 |
4505 | while (tvb_reported_length_remaining(tvb, offset) > 0) {
4506 | /* Switch protocol if the data starts after response headers. */
4507 | if (conv_data->startframe &&
4508 | (pinfo->num > conv_data->startframe ||
4509 | (pinfo->num == conv_data->startframe && offset >= conv_data->startoffset))) {
4510 | /* Increase pinfo->can_desegment because we are traversing
4511 | * http and want to preserve desegmentation functionality for
4512 | * the proxied protocol
4513 | */
4514 | if (pinfo->can_desegment > 0)
4515 | pinfo->can_desegment++;
4516 | if (conv_data->next_handle) {
4517 | conv_data->upgrade_info->from_server = pinfo->srcport == conv_data->server_port && addresses_equal(
4518 | &pinfo->src, &conv_data->server_addr);
4519 | call_dissector_only(conv_data->next_handle, tvb_new_subset_remaining(tvb, offset), pinfo, tree, conv_data->upgrade_info);
4520 | } else {
4521 | call_data_dissector(tvb_new_subset_remaining(tvb, offset), pinfo, tree);
4522 | }
4523 | /*
4524 | * If a subdissector requests reassembly, be sure not to
4525 | * include the preceding HTTP headers.
4526 | */
4527 | if (pinfo->desegment_len) {
4528 | pinfo->desegment_offset += offset;
4529 | }
4530 | break;
4531 | }
4532 | len = dissect_http_message(tvb, offset, pinfo, tree, conv_data, "HTTP", proto_http, end_of_stream, seq);
4533 | if (len < 0)
4534 | break;
4535 | offset += len;
4536 |
4537 | /*
4538 | * OK, we've set the Protocol and Info columns for the
4539 | * first HTTP message; set a fence so that subsequent
4540 | * HTTP messages don't overwrite the Info column.
4541 | */
4542 | col_set_fence(pinfo->cinfo, COL_INFO);
4543 | }
4544 | /* dissect_http_message() returns -2 if message is not valid HTTP */
4545 | return (len == -2)
4546 | ? 0
4547 | : (int)tvb_captured_length(tvb);
4548 | }
4549 |
4550 | static int
4551 | dissect_http_tcp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data)
4552 | {
4553 | struct tcpinfo *tcpinfo = (struct tcpinfo *)data;
4554 | conversation_t *conversation;
4555 | http_conv_t *conv_data;
4556 | bool_Bool end_of_stream;
4557 |
4558 | conv_data = get_http_conversation_data(pinfo, &conversation);
4559 |
4560 | /* Call HTTP2 dissector directly when detected via heuristics, but not
4561 | * when it was upgraded (the conversation started with HTTP). */
4562 | if (conversation_get_proto_data(conversation, proto_http2) &&
4563 | !conv_data->startframe) {
4564 | if (pinfo->can_desegment > 0)
4565 | pinfo->can_desegment++;
4566 | return call_dissector_only(http2_handle, tvb, pinfo, tree, data);
4567 | }
4568 |
4569 | /*
4570 | * Check if this is proxied connection and if so, hand of dissection to the
4571 | * payload-dissector.
4572 | * Response code 200 means "OK" and strncmp() == 0 means the strings match exactly */
4573 | if(http_conversation_is_connect(conversation, pinfo->num)) {
4574 | if (conv_data->startframe == 0 && !PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
4575 | conv_data->startframe = pinfo->num;
4576 | conv_data->startoffset = 0;
4577 | copy_address_wmem(wmem_file_scope(), &conv_data->server_addr, &pinfo->dst);
4578 | conv_data->server_port = pinfo->destport;
4579 | }
4580 | http_payload_subdissector(tvb, tree, pinfo, conv_data, tcpinfo);
4581 |
4582 | return tvb_captured_length(tvb);
4583 | }
4584 |
4585 | /* XXX - how to detect end-of-stream without tcpinfo */
4586 | end_of_stream = (tcpinfo && IS_TH_FIN(tcpinfo->flags)(tcpinfo->flags & 0x001));
4587 | return dissect_http_on_stream(tvb, pinfo, tree, conv_data, end_of_stream, tcpinfo ? &tcpinfo->seq : NULL((void*)0));
4588 | }
4589 |
4590 | static bool_Bool
4591 | dissect_http_heur_tcp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
4592 | {
4593 | unsigned offset = 0, next_offset, linelen;
4594 | bool_Bool found;
4595 | conversation_t *conversation;
4596 |
4597 |
4598 | /* Check if we have a line terminated by CRLF
4599 | * Return the length of the line (not counting the line terminator at
4600 | * the end), or, if we don't find a line terminator:
4601 | *
4602 | * if "deseg" is true, return -1;
4603 | */
4604 | found = tvb_find_line_end_remaining(tvb, offset, &linelen , &next_offset);
4605 | if((found == false0)||(linelen == 8)){
4606 | return false0;
4607 | }
4608 |
4609 | /* Check if the line start or ends with the HTTP token */
4610 | if((tvb_strncaseeql(tvb, linelen-8, "HTTP/1.", 7) == 0)||(tvb_strncaseeql(tvb, 0, "HTTP/1.", 7) == 0)){
4611 | conversation = find_or_create_conversation(pinfo);
4612 | conversation_set_dissector_from_frame_number(conversation, pinfo->num, http_tcp_handle);
4613 | dissect_http_tcp(tvb, pinfo, tree, data);
4614 | return true1;
4615 | }
4616 |
4617 | return false0;
4618 | }
4619 |
4620 | static int
4621 | dissect_http_tls(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data)
4622 | {
4623 | conversation_t *conversation;
4624 | http_conv_t *conv_data;
4625 | bool_Bool end_of_stream;
4626 |
4627 | conv_data = get_http_conversation_data(pinfo, &conversation);
4628 |
4629 | struct tlsinfo *tlsinfo = (struct tlsinfo *)data;
4630 | end_of_stream = (tlsinfo && tlsinfo->end_of_stream);
4631 | return dissect_http_on_stream(tvb, pinfo, tree, conv_data, end_of_stream, tlsinfo ? &tlsinfo->seq : NULL((void*)0));
4632 | }
4633 |
4634 | static bool_Bool
4635 | dissect_http_heur_tls(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
4636 | {
4637 | unsigned offset = 0, next_offset, linelen;
4638 | struct tlsinfo *tlsinfo = (struct tlsinfo *)data;
4639 |
4640 | /* Check if we have a line terminated by CRLF
4641 | * Return the length of the line (not counting the line terminator at
4642 | * the end), or, if we don't find a line terminator:
4643 | *
4644 | * if "deseg" is true, return -1;
4645 | */
4646 | bool_Bool found = tvb_find_line_end_remaining(tvb, offset, &linelen, &next_offset);
4647 | if((found == false0)||(linelen == 8)){
4648 | return false0;
4649 | }
4650 |
4651 | /* Check if the line start or ends with the HTTP token */
4652 | if((tvb_strncaseeql(tvb, linelen-8, "HTTP/1.", 7) != 0) && (tvb_strncaseeql(tvb, 0, "HTTP/1.", 7) != 0)) {
4653 | /* we couldn't find the Magic Hello HTTP/1.X. */
4654 | return false0;
4655 | }
4656 |
4657 | *(tlsinfo->app_handle) = http_tls_handle;
4658 | dissect_http_tls(tvb, pinfo, tree, data);
4659 | return true1;
4660 | }
4661 |
4662 | static int
4663 | dissect_http_sctp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U___attribute__((unused)))
4664 | {
4665 | conversation_t *conversation;
4666 | http_conv_t *conv_data;
4667 |
4668 | conv_data = get_http_conversation_data(pinfo, &conversation);
4669 |
4670 | /*
4671 | * XXX - we need to provide an end-of-stream indication.
4672 | */
4673 | return dissect_http_on_stream(tvb, pinfo, tree, conv_data, false0, NULL((void*)0));
4674 | }
4675 |
4676 | static int
4677 | dissect_http(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U___attribute__((unused)))
4678 | {
4679 | conversation_t *conversation;
4680 | http_conv_t *conv_data;
4681 |
4682 | conv_data = get_http_conversation_data(pinfo, &conversation);
4683 |
4684 | /*
4685 | * XXX - what should be done about reassembly, pipelining, etc.
4686 | * here?
4687 | */
4688 | return dissect_http_on_stream(tvb, pinfo, tree, conv_data, false0, NULL((void*)0));
4689 | }
4690 |
4691 | static int
4692 | dissect_ssdp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U___attribute__((unused)))
4693 | {
4694 | conversation_t *conversation;
4695 | http_conv_t *conv_data;
4696 |
4697 | conv_data = get_http_conversation_data(pinfo, &conversation);
4698 | dissect_http_message(tvb, 0, pinfo, tree, conv_data, "SSDP", proto_ssdp, false0, NULL((void*)0));
4699 | return tvb_captured_length(tvb);
4700 | }
4701 |
4702 | static void
4703 | range_delete_http_tls_callback(uint32_t port, void *ptr _U___attribute__((unused))) {
4704 | ssl_dissector_delete(port, http_tls_handle);
4705 | }
4706 |
4707 | static void
4708 | range_add_http_tls_callback(uint32_t port, void *ptr _U___attribute__((unused))) {
4709 | ssl_dissector_add(port, http_tls_handle);
4710 | }
4711 |
4712 | static void reinit_http(void) {
4713 | http_tcp_range = prefs_get_range_value("http", "tcp.port");
4714 |
4715 | http_sctp_range = prefs_get_range_value("http", "sctp.port");
4716 |
4717 | range_foreach(http_tls_range, range_delete_http_tls_callback, NULL((void*)0));
4718 | wmem_free(wmem_epan_scope(), http_tls_range);
4719 | http_tls_range = range_copy(wmem_epan_scope(), global_http_tls_range);
4720 | range_foreach(http_tls_range, range_add_http_tls_callback, NULL((void*)0));
4721 | }
4722 |
4723 | void
4724 | proto_register_http(void)
4725 | {
4726 | static hf_register_info hf[] = {
4727 | { &hf_http_notification,
4728 | { "Notification", "http.notification",
4729 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
4730 | "true if HTTP notification", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4731 | { &hf_http_response,
4732 | { "Response", "http.response",
4733 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
4734 | "true if HTTP response", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4735 | { &hf_http_request,
4736 | { "Request", "http.request",
4737 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
4738 | "true if HTTP request", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4739 | { &hf_http_basic,
4740 | { "Credentials", "http.authbasic",
4741 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4742 | { &hf_http_citrix,
4743 | { "Citrix AG Auth", "http.authcitrix",
4744 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
4745 | "true if CitrixAGBasic Auth", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4746 | { &hf_http_citrix_user,
4747 | { "Citrix AG Username", "http.authcitrix.user",
4748 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4749 | { &hf_http_citrix_domain,
4750 | { "Citrix AG Domain", "http.authcitrix.domain",
4751 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4752 | { &hf_http_citrix_passwd,
4753 | { "Citrix AG Password", "http.authcitrix.password",
4754 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4755 | { &hf_http_citrix_session,
4756 | { "Citrix AG Session ID", "http.authcitrix.session",
4757 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4758 | { &hf_http_response_line,
4759 | { "Response line", "http.response.line",
4760 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4761 | { &hf_http_request_line,
4762 | { "Request line", "http.request.line",
4763 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4764 | { &hf_http_request_method,
4765 | { "Request Method", "http.request.method",
4766 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4767 | "HTTP Request Method", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4768 | { &hf_http_request_uri,
4769 | { "Request URI", "http.request.uri",
4770 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4771 | "HTTP Request-URI", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4772 | { &hf_http_request_path,
4773 | { "Request URI Path", "http.request.uri.path",
4774 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4775 | "HTTP Request-URI Path", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4776 | { &hf_http_request_path_segment,
4777 | { "Request URI Path Segment", "http.request.uri.path.segment",
4778 | FT_STRING, BASE_NONE, NULL((void*)0), 0,
4779 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
4780 | { &hf_http_request_query,
4781 | { "Request URI Query", "http.request.uri.query",
4782 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4783 | "HTTP Request-URI Query", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4784 | { &hf_http_request_query_parameter,
4785 | { "Request URI Query Parameter", "http.request.uri.query.parameter",
4786 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4787 | "HTTP Request-URI Query Parameter", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4788 | { &hf_http_request_version,
4789 | { "Request Version", "http.request.version",
4790 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4791 | "HTTP Request HTTP-Version", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4792 | { &hf_http_response_version,
4793 | { "Response Version", "http.response.version",
4794 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4795 | "HTTP Response HTTP-Version", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4796 | { &hf_http_request_full_uri,
4797 | { "Full request URI", "http.request.full_uri",
4798 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4799 | "The full requested URI (including host name)", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4800 | { &hf_http_response_code,
4801 | { "Status Code", "http.response.code",
4802 | FT_UINT24, BASE_DEC, NULL((void*)0), 0x0,
4803 | "HTTP Response Status Code", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4804 | { &hf_http_response_code_desc,
4805 | { "Status Code Description", "http.response.code.desc",
4806 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4807 | "HTTP Response Status Code Description", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4808 | { &hf_http_response_phrase,
4809 | { "Response Phrase", "http.response.phrase",
4810 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4811 | "HTTP Response Reason Phrase", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4812 | { &hf_http_authorization,
4813 | { "Authorization", "http.authorization",
4814 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4815 | "HTTP Authorization header", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4816 | { &hf_http_proxy_authenticate,
4817 | { "Proxy-Authenticate", "http.proxy_authenticate",
4818 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4819 | "HTTP Proxy-Authenticate header", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4820 | { &hf_http_proxy_authorization,
4821 | { "Proxy-Authorization", "http.proxy_authorization",
4822 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4823 | "HTTP Proxy-Authorization header", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4824 | { &hf_http_proxy_connect_host,
4825 | { "Proxy-Connect-Hostname", "http.proxy_connect_host",
4826 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4827 | "HTTP Proxy Connect Hostname", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4828 | { &hf_http_proxy_connect_port,
4829 | { "Proxy-Connect-Port", "http.proxy_connect_port",
4830 | FT_UINT16, BASE_DEC, NULL((void*)0), 0x0,
4831 | "HTTP Proxy Connect Port", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4832 | { &hf_http_www_authenticate,
4833 | { "WWW-Authenticate", "http.www_authenticate",
4834 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4835 | "HTTP WWW-Authenticate header", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4836 | { &hf_http_content_type,
4837 | { "Content-Type", "http.content_type",
4838 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4839 | "HTTP Content-Type header", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4840 | { &hf_http_content_length_header,
4841 | { "Content-Length", "http.content_length_header",
4842 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4843 | "HTTP Content-Length header", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4844 | { &hf_http_content_length,
4845 | { "Content length", "http.content_length",
4846 | FT_UINT64, BASE_DEC, NULL((void*)0), 0x0,
4847 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4848 | { &hf_http_content_encoding,
4849 | { "Content-Encoding", "http.content_encoding",
4850 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4851 | "HTTP Content-Encoding header", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4852 | { &hf_http_transfer_encoding,
4853 | { "Transfer-Encoding", "http.transfer_encoding",
4854 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4855 | "HTTP Transfer-Encoding header", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4856 | { &hf_http_upgrade,
4857 | { "Upgrade", "http.upgrade",
4858 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4859 | "HTTP Upgrade header", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4860 | { &hf_http_user_agent,
4861 | { "User-Agent", "http.user_agent",
4862 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4863 | "HTTP User-Agent header", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4864 | { &hf_http_host,
4865 | { "Host", "http.host",
4866 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4867 | "HTTP Host", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4868 | { &hf_http_range,
4869 | { "Range", "http.range",
4870 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4871 | "HTTP Range", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4872 | { &hf_http_content_range,
4873 | { "Content-Range", "http.content_range",
4874 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4875 | "HTTP Content-Range", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4876 | { &hf_http_connection,
4877 | { "Connection", "http.connection",
4878 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4879 | "HTTP Connection", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4880 | { &hf_http_cookie,
4881 | { "Cookie", "http.cookie",
4882 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4883 | "HTTP Cookie", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4884 | { &hf_http_cookie_pair,
4885 | { "Cookie pair", "http.cookie_pair",
4886 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4887 | "A name/value HTTP cookie pair", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4888 | { &hf_http_accept,
4889 | { "Accept", "http.accept",
4890 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4891 | "HTTP Accept", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4892 | { &hf_http_accept_query,
4893 | { "Accept-Query", "http.accept_query",
4894 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4895 | "HTTP Accept-Query", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4896 | { &hf_http_referer,
4897 | { "Referer", "http.referer",
4898 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4899 | "HTTP Referer", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4900 | { &hf_http_accept_language,
4901 | { "Accept-Language", "http.accept_language",
4902 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4903 | "HTTP Accept Language", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4904 | { &hf_http_accept_encoding,
4905 | { "Accept Encoding", "http.accept_encoding",
4906 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4907 | "HTTP Accept Encoding", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4908 | { &hf_http_date,
4909 | { "Date", "http.date",
4910 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4911 | "HTTP Date", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4912 | { &hf_http_cache_control,
4913 | { "Cache-Control", "http.cache_control",
4914 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4915 | "HTTP Cache Control", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4916 | { &hf_http_server,
4917 | { "Server", "http.server",
4918 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4919 | "HTTP Server", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4920 | { &hf_http_location,
4921 | { "Location", "http.location",
4922 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4923 | "HTTP Location", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4924 | { &hf_http_sec_websocket_accept,
4925 | { "Sec-WebSocket-Accept", "http.sec_websocket_accept",
4926 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4927 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4928 | { &hf_http_sec_websocket_extensions,
4929 | { "Sec-WebSocket-Extensions", "http.sec_websocket_extensions",
4930 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4931 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4932 | { &hf_http_sec_websocket_key,
4933 | { "Sec-WebSocket-Key", "http.sec_websocket_key",
4934 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4935 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4936 | { &hf_http_sec_websocket_protocol,
4937 | { "Sec-WebSocket-Protocol", "http.sec_websocket_protocol",
4938 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4939 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4940 | { &hf_http_sec_websocket_version,
4941 | { "Sec-WebSocket-Version", "http.sec_websocket_version",
4942 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4943 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4944 | { &hf_http_set_cookie,
4945 | { "Set-Cookie", "http.set_cookie",
4946 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4947 | "HTTP Set Cookie", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4948 | { &hf_http_last_modified,
4949 | { "Last-Modified", "http.last_modified",
4950 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4951 | "HTTP Last Modified", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4952 | { &hf_http_x_forwarded_for,
4953 | { "X-Forwarded-For", "http.x_forwarded_for",
4954 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4955 | "HTTP X-Forwarded-For", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4956 | { &hf_http_http2_settings,
4957 | { "HTTP2-Settings", "http.http2_settings",
4958 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4959 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4960 | { &hf_http_request_in,
4961 | { "Request in frame", "http.request_in",
4962 | FT_FRAMENUM, BASE_NONE, FRAMENUM_TYPE(FT_FRAMENUM_REQUEST)((gpointer) (glong) (FT_FRAMENUM_REQUEST)), 0,
4963 | "This packet is a response to the packet with this number", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4964 | { &hf_http_response_in,
4965 | { "Response in frame", "http.response_in",
4966 | FT_FRAMENUM, BASE_NONE, FRAMENUM_TYPE(FT_FRAMENUM_RESPONSE)((gpointer) (glong) (FT_FRAMENUM_RESPONSE)), 0,
4967 | "This packet will be responded in the packet with this number", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4968 | { &hf_http_time,
4969 | { "Time since request", "http.time",
4970 | FT_RELATIVE_TIME, BASE_NONE, NULL((void*)0), 0,
4971 | "Time since the request was sent", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4972 | { &hf_http_chunked_trailer_part,
4973 | { "trailer-part", "http.chunked_trailer_part",
4974 | FT_STRING, BASE_NONE, NULL((void*)0), 0,
4975 | "Optional trailer in a chunked body", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4976 | { &hf_http_chunk_boundary,
4977 | { "Chunk boundary", "http.chunk_boundary",
4978 | FT_BYTES, BASE_NONE, NULL((void*)0), 0,
4979 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4980 | { &hf_http_chunk_size,
4981 | { "Chunk size", "http.chunk_size",
4982 | FT_UINT32, BASE_DEC|BASE_UNIT_STRING0x00001000, UNS(&units_octet_octets)((0 ? (const struct unit_name_string*)0 : ((&units_octet_octets )))), 0,
4983 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4984 | { &hf_http_chunk_data,
4985 | { "Chunk data", "http.chunk_data",
4986 | FT_BYTES, BASE_NONE, NULL((void*)0), 0,
4987 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4988 | { &hf_http_file_data,
4989 | { "File Data", "http.file_data",
4990 | FT_BYTES, BASE_NONE, NULL((void*)0), 0,
4991 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4992 | { &hf_http_unknown_header,
4993 | { "Unknown header", "http.unknown_header",
4994 | FT_STRING, BASE_NONE, NULL((void*)0), 0,
4995 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4996 | { &hf_http_http2_settings_uri,
4997 | { "HTTP2 Settings URI", "http.http2_settings_uri",
4998 | FT_BYTES, BASE_NONE, NULL((void*)0), 0,
4999 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
5000 |
5001 | /* Body fragments */
5002 | REASSEMBLE_INIT_HF_ITEMS(http_body, "HTTP Chunked Body", "http.body"){ &hf_http_body_fragments, { "Reassembled " "HTTP Chunked Body" " fragments", "http.body" ".fragments", FT_NONE, BASE_NONE, ( (void*)0), 0x0, ((void*)0), -1, 0, HF_REF_TYPE_NONE, -1, ((void *)0) } }, { &hf_http_body_fragment, { "HTTP Chunked Body" " fragment", "http.body" ".fragment", FT_FRAMENUM, BASE_NONE , ((void*)0), 0x0, ((void*)0), -1, 0, HF_REF_TYPE_NONE, -1, ( (void*)0) } }, { &hf_http_body_fragment_overlap, { "HTTP Chunked Body" " fragment overlap", "http.body" ".fragment.overlap", FT_BOOLEAN , BASE_NONE, ((void*)0), 0x0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0) } }, { &hf_http_body_fragment_overlap_conflicts , { "HTTP Chunked Body" " fragment overlapping with conflicting data" , "http.body" ".fragment.overlap.conflicts", FT_BOOLEAN, BASE_NONE , ((void*)0), 0x0, ((void*)0), -1, 0, HF_REF_TYPE_NONE, -1, ( (void*)0) } }, { &hf_http_body_fragment_multiple_tails, { "HTTP Chunked Body" " has multiple tail fragments", "http.body" ".fragment.multiple_tails", FT_BOOLEAN, BASE_NONE, ((void*)0 ), 0x0, ((void*)0), -1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, { &hf_http_body_fragment_too_long_fragment, { "HTTP Chunked Body" " fragment too long", "http.body" ".fragment.too_long_fragment" , FT_BOOLEAN, BASE_NONE, ((void*)0), 0x0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0) } }, { &hf_http_body_fragment_error, { "HTTP Chunked Body" " defragment error", "http.body" ".fragment.error", FT_FRAMENUM , BASE_NONE, ((void*)0), 0x0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0) } }, { &hf_http_body_fragment_count, { "HTTP Chunked Body" " fragment count", "http.body" ".fragment.count", FT_UINT32, BASE_DEC, ((void*)0), 0x0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0) } }, { &hf_http_body_reassembled_in, { "Reassembled in" , "http.body" ".reassembled.in", FT_FRAMENUM, BASE_NONE, ((void *)0), 0x0, ((void*)0), -1, 0, HF_REF_TYPE_NONE, -1, ((void*)0 ) } }, { &hf_http_body_reassembled_length, { "Reassembled length" , "http.body" ".reassembled.length", FT_UINT32, BASE_DEC, ((void *)0), 0x0, ((void*)0), -1, 0, HF_REF_TYPE_NONE, -1, ((void*)0 ) } }, { &hf_http_body_reassembled_data, { "Reassembled data" , "http.body" ".reassembled.data", FT_BYTES, BASE_NONE, ((void *)0), 0x0, ((void*)0), -1, 0, HF_REF_TYPE_NONE, -1, ((void*)0 ) } }, { &hf_http_body_segment, { "HTTP Chunked Body" " segment" , "http.body" ".segment", FT_BYTES, BASE_NONE, ((void*)0), 0x0 , ((void*)0), -1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
5003 | };
5004 | static int *ett[] = {
5005 | &ett_http,
5006 | &ett_http_ntlmssp,
5007 | &ett_http_kerberos,
5008 | &ett_http_request,
5009 | &ett_http_request_uri,
5010 | &ett_http_request_path,
5011 | &ett_http_request_query,
5012 | &ett_http_chunked_response,
5013 | &ett_http_chunk_data,
5014 | &ett_http_encoded_entity,
5015 | &ett_http_header_item,
5016 | &ett_http_http2_settings_item,
5017 | REASSEMBLE_INIT_ETT_ITEMS(http_body)&ett_http_body_fragment, &ett_http_body_fragments,
5018 | };
5019 |
5020 | static ei_register_info ei[] = {
5021 | { &ei_http_te_and_length, { "http.te_and_length", PI_MALFORMED0x07000000, PI_WARN0x00600000, "The Content-Length and Transfer-Encoding header must not be set together", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} }},
5022 | { &ei_http_te_unknown, { "http.te_unknown", PI_UNDECODED0x05000000, PI_WARN0x00600000, "Unknown transfer coding name in Transfer-Encoding header", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} }},
5023 | { &ei_http_subdissector_failed, { "http.subdissector_failed", PI_MALFORMED0x07000000, PI_NOTE0x00400000, "HTTP body subdissector failed, trying heuristic subdissector", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} }},
5024 | { &ei_http_tls_port, { "http.tls_port", PI_SECURITY0x0a000000, PI_WARN0x00600000, "Unencrypted HTTP protocol detected over encrypted port, could indicate a dangerous misconfiguration.", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} }},
5025 | { &ei_http_excess_data, { "http.excess_data", PI_PROTOCOL0x09000000, PI_WARN0x00600000, "Excess data after a body (not a new request/response), previous Content-Length bogus?", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} }},
5026 | { &ei_http_leading_crlf, { "http.leading_crlf", PI_MALFORMED0x07000000, PI_ERROR0x00800000, "Leading CRLF previous message in the stream may have extra CRLF", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} }},
5027 | { &ei_http_bad_header_name, { "http.bad_header_name", PI_PROTOCOL0x09000000, PI_WARN0x00600000, "Illegal characters found in header name", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} }},
5028 | { &ei_http_header_name_trailing_ws, { "http.header_name.trailing_whitespace", PI_PROTOCOL0x09000000, PI_WARN0x00600000, "Whitespace before header colon", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} }},
5029 | { &ei_http_bad_header_value_nul, { "http.header_value.invalid_nul_char", PI_PROTOCOL0x09000000, PI_WARN0x00600000, "Invalid NUL byte in HTTP header value", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} }},
5030 | { &ei_http_decompression_failed, { "http.decompression_failed", PI_UNDECODED0x05000000, PI_WARN0x00600000, "Decompression failed", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} }},
5031 | { &ei_http_decompression_disabled, { "http.decompression_disabled", PI_UNDECODED0x05000000, PI_CHAT0x00200000, "Decompression disabled", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} }},
5032 | { &ei_http_response_code_invalid, { "http.response.code.invalid", PI_MALFORMED0x07000000, PI_WARN0x00600000, "Invalid HTTP response status code token", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} }},
5033 | { &ei_http_request_uri_invalid, { "http.request.uri.invalid", PI_MALFORMED0x07000000, PI_ERROR0x00800000, "Invalid request target", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} }},
5034 | { &ei_http_request_uri_whitespace, { "http.request.uri.whitespace", PI_PROTOCOL0x09000000, PI_WARN0x00600000, "Request target contains whitespace", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} }},
5035 |
5036 | };
5037 |
5038 | /* UAT for header fields */
5039 | static uat_field_t custom_header_uat_fields[] = {
5040 | UAT_FLD_CSTRING(header_fields, header_name, "Header name", "HTTP header name"){"header_name", "Header name", PT_TXTMOD_STRING,{uat_fld_chk_str ,header_fields_header_name_set_cb,header_fields_header_name_tostr_cb },{0,0,0},0,"HTTP header name",((void*)0)},
5041 | UAT_FLD_CSTRING(header_fields, header_desc, "Field desc", "Description of the value contained in the header"){"header_desc", "Field desc", PT_TXTMOD_STRING,{uat_fld_chk_str ,header_fields_header_desc_set_cb,header_fields_header_desc_tostr_cb },{0,0,0},0,"Description of the value contained in the header" ,((void*)0)},
5042 | UAT_END_FIELDS{((void*)0),((void*)0),PT_TXTMOD_NONE,{0,0,0},{0,0,0},0,0,((void *)0)}
5043 | };
5044 |
5045 | module_t *http_module;
5046 | expert_module_t* expert_http;
5047 | uat_t* headers_uat;
5048 |
5049 | proto_http = proto_register_protocol("Hypertext Transfer Protocol", "HTTP", "http");
5050 | proto_ssdp = proto_register_protocol("Simple Service Discovery Protocol", "SSDP", "ssdp");
5051 |
5052 | proto_register_field_array(proto_http, hf, array_length(hf)(sizeof (hf) / sizeof (hf)[0]));
5053 | proto_register_subtree_array(ett, array_length(ett)(sizeof (ett) / sizeof (ett)[0]));
5054 | expert_http = expert_register_protocol(proto_http);
5055 | expert_register_field_array(expert_http, ei, array_length(ei)(sizeof (ei) / sizeof (ei)[0]));
5056 |
5057 | http_handle = register_dissector("http", dissect_http, proto_http);
5058 | http_tcp_handle = register_dissector("http-over-tcp", dissect_http_tcp, proto_http);
5059 | http_tls_handle = register_dissector("http-over-tls", dissect_http_tls, proto_http); /* RFC 2818 */
5060 | http_sctp_handle = register_dissector("http-over-sctp", dissect_http_sctp, proto_http);
5061 |
5062 | reassembly_table_register(&http_streaming_reassembly_table, &addresses_ports_reassembly_table_functions);
5063 |
5064 | http_module = prefs_register_protocol(proto_http, reinit_http);
5065 | prefs_register_bool_preference(http_module, "desegment_headers",
5066 | "Reassemble HTTP headers spanning multiple TCP segments",
5067 | "Whether the HTTP dissector should reassemble headers "
5068 | "of a request spanning multiple TCP segments. "
5069 | "To use this option, you must also enable "
5070 | "\"Allow subdissectors to reassemble TCP streams\" in the TCP protocol settings.",
5071 | &http_desegment_headers);
5072 | prefs_register_bool_preference(http_module, "desegment_body",
5073 | "Reassemble HTTP bodies spanning multiple TCP segments",
5074 | "Whether the HTTP dissector should use the "
5075 | "\"Content-length:\" value, if present, to reassemble "
5076 | "the body of a request spanning multiple TCP segments, "
5077 | "and reassemble chunked data spanning multiple TCP segments. "
5078 | "To use this option, you must also enable "
5079 | "\"Allow subdissectors to reassemble TCP streams\" in the TCP protocol settings.",
5080 | &http_desegment_body);
5081 | prefs_register_bool_preference(http_module, "dechunk_body",
5082 | "Reassemble chunked transfer-coded bodies",
5083 | "Whether to reassemble bodies of entities that are transferred "
5084 | "using the \"Transfer-Encoding: chunked\" method",
5085 | &http_dechunk_body);
5086 | prefs_register_bool_preference(http_module, "decompress_body",
5087 | "Uncompress entity bodies",
5088 | "Whether to uncompress entity bodies that are compressed "
5089 | "using \"Content-Encoding: \"",
5090 | &http_decompress_body);
5091 | prefs_register_bool_preference(http_module, "check_ascii_headers",
5092 | "Reject non-ASCII headers as invalid HTTP",
5093 | "Whether to treat non-ASCII in headers as non-HTTP data "
5094 | "and allow other dissectors to process it",
5095 | &http_check_ascii_headers);
5096 | prefs_register_bool_preference(http_module, "try_heuristic_first",
5097 | "Try heuristic sub-dissectors first",
5098 | "Try to decode HTTP bodies using heuristic sub-dissector "
5099 | "(aka MIME sniffing) before using a sub-dissector registered "
5100 | "to the Content-Type header or a specific port",
5101 | &http_try_heuristic_first);
5102 | prefs_register_obsolete_preference(http_module, "tcp_alternate_port");
5103 |
5104 | range_convert_str(wmem_epan_scope(), &global_http_tls_range, TLS_DEFAULT_RANGE"443", 65535);
5105 | prefs_register_range_preference(http_module, "tls.port", "SSL/TLS Ports",
5106 | "SSL/TLS Ports range",
5107 | &global_http_tls_range, 65535);
5108 | prefs_register_obsolete_preference(http_module, "ssl.port");
5109 | /* UAT */
5110 | headers_uat = uat_new("Custom HTTP Header Fields",
5111 | sizeof(header_field_t),
5112 | "custom_http_header_fields",
5113 | true1,
5114 | &header_fields,
5115 | &num_header_fields,
5116 | /* specifies named fields, so affects dissection
5117 | and the set of named fields */
5118 | UAT_AFFECTS_DISSECTION0x00000001|UAT_AFFECTS_FIELDS0x00000002,
5119 | NULL((void*)0),
5120 | header_fields_copy_cb,
5121 | header_fields_update_cb,
5122 | header_fields_free_cb,
5123 | header_fields_post_update_cb,
5124 | header_fields_reset_cb,
5125 | custom_header_uat_fields
5126 | );
5127 |
5128 | prefs_register_uat_preference(http_module, "custom_http_header_fields", "Custom HTTP header fields",
5129 | "A table to define custom HTTP header for which fields can be setup and used for filtering/data extraction etc.",
5130 | headers_uat);
5131 |
5132 | /*
5133 | * Dissectors shouldn't register themselves in this table;
5134 | * instead, they should call "http_tcp_dissector_add()", and
5135 | * we'll register the port number they specify as a port
5136 | * for HTTP, and register them in our subdissector table.
5137 | *
5138 | * This only works for protocols such as IPP that run over
5139 | * HTTP on a specific non-HTTP port.
5140 | */
5141 | port_subdissector_table = register_dissector_table("http.port",
5142 | "TCP port for protocols using HTTP", proto_http, FT_UINT16, BASE_DEC);
5143 |
5144 | /*
5145 | * Maps the Upgrade header value.
5146 | * https://datatracker.ietf.org/doc/html/rfc9110#section-16.7
5147 | * "A protocol-name token is case-insensitive and registered with the
5148 | * preferred case to be generated by senders."
5149 | */
5150 | upgrade_subdissector_table = register_dissector_table("http.upgrade", "HTTP Upgrade", proto_http, FT_STRING, STRING_CASE_INSENSITIVE1);
5151 |
5152 | /*
5153 | * Heuristic dissectors SHOULD register themselves in
5154 | * this table using the standard heur_dissector_add()
5155 | * function.
5156 | */
5157 | heur_subdissector_list = register_heur_dissector_list_with_description("http", "HTTP payload fallback", proto_http);
5158 |
5159 | /*
5160 | * Register for tapping
5161 | */
5162 | http_tap = register_tap("http"); /* HTTP statistics tap */
5163 | http_follow_tap = register_tap("http_follow"); /* HTTP Follow tap */
5164 | credentials_tap = register_tap("credentials"); /* credentials tap */
5165 |
5166 | register_follow_stream(proto_http, "http_follow", tcp_follow_conv_filter, tcp_follow_index_filter, tcp_follow_address_filter,
5167 | tcp_port_to_display, follow_tvb_tap_listener,
5168 | get_tcp_stream_count, NULL((void*)0));
5169 | http_eo_tap = register_export_object(proto_http, http_eo_packet, NULL((void*)0));
5170 |
5171 | /* compile patterns, excluding "/" */
5172 | ws_mempbrk_compile(&pbrk_gen_delims, ":?#[]@");
5173 | /* exclude "=", separating key and value should be done separately */
5174 | ws_mempbrk_compile(&pbrk_sub_delims, "!$&'()*+,;");
5175 |
5176 | register_external_value_string("vals_http_status_code", vals_http_status_code);
5177 | }
5178 |
5179 | /*
5180 | * Called by dissectors for protocols that run atop HTTP/TCP.
5181 | */
5182 | void
5183 | http_tcp_dissector_add(uint32_t port, dissector_handle_t handle)
5184 | {
5185 | /*
5186 | * Register ourselves as the handler for that port number
5187 | * over TCP. "Auto-preference" not needed
5188 | */
5189 | dissector_add_uint("tcp.port", port, http_tcp_handle);
5190 |
5191 | /*
5192 | * And register them in *our* table for that port.
5193 | */
5194 | dissector_add_uint("http.port", port, handle);
5195 | }
5196 |
5197 | WS_DLL_PUBLIC__attribute__ ((visibility ("default"))) extern
5198 | void http_tcp_dissector_delete(uint32_t port)
5199 | {
5200 | /*
5201 | * Unregister ourselves as the handler for that port number
5202 | * over TCP. "Auto-preference" not needed
5203 | */
5204 | dissector_delete_uint("tcp.port", port, NULL((void*)0));
5205 |
5206 | /*
5207 | * And unregister them in *our* table for that port.
5208 | */
5209 | dissector_delete_uint("http.port", port, NULL((void*)0));
5210 | }
5211 |
5212 | void
5213 | http_tcp_port_add(uint32_t port)
5214 | {
5215 | /*
5216 | * Register ourselves as the handler for that port number
5217 | * over TCP. We rely on our caller having registered
5218 | * themselves for the appropriate media type.
5219 | * No "auto-preference" used.
5220 | */
5221 | dissector_add_uint("tcp.port", port, http_tcp_handle);
5222 | }
5223 |
5224 | void
5225 | proto_reg_handoff_http(void)
5226 | {
5227 | dissector_handle_t ssdp_handle;
5228 |
5229 | media_handle = find_dissector_add_dependency("media", proto_http);
5230 | http2_handle = find_dissector("http2");
5231 | /*
5232 | * XXX - is there anything to dissect in the body of an SSDP
5233 | * request or reply? I.e., should there be an SSDP dissector?
5234 | */
5235 | ssdp_handle = create_dissector_handle(dissect_ssdp, proto_ssdp);
5236 | dissector_add_uint_with_preference("udp.port", UDP_PORT_SSDP1900, ssdp_handle);
5237 |
5238 | /*
5239 | * TLS Application-Layer Protocol Negotiation (ALPN) protocol ID.
5240 | */
5241 | dissector_add_string("tls.alpn", "http/1.1", http_tls_handle);
5242 |
5243 | ntlmssp_handle = find_dissector_add_dependency("ntlmssp", proto_http);
5244 | gssapi_handle = find_dissector_add_dependency("gssapi", proto_http);
5245 | sstp_handle = find_dissector_add_dependency("sstp", proto_http);
5246 |
5247 | stats_tree_cfg *st_config;
5248 | st_config = stats_tree_register("http", "http", "HTTP" STATS_TREE_MENU_SEPARATOR"//" "Packet Counter", 0, http_stats_tree_packet, http_stats_tree_init, NULL((void*)0) );
5249 | stats_tree_set_first_column_name(st_config, "Packet Type");
5250 | st_config = stats_tree_register("http", "http_req", "HTTP" STATS_TREE_MENU_SEPARATOR"//" "Requests", 0, http_req_stats_tree_packet, http_req_stats_tree_init, NULL((void*)0) );
5251 | stats_tree_set_first_column_name(st_config, "Request Type");
5252 | st_config = stats_tree_register("http", "http_srv", "HTTP" STATS_TREE_MENU_SEPARATOR"//" "Load Distribution",0, http_reqs_stats_tree_packet, http_reqs_stats_tree_init, NULL((void*)0) );
5253 | stats_tree_set_first_column_name(st_config, "Packet Type");
5254 | st_config = stats_tree_register("http", "http_seq", "HTTP" STATS_TREE_MENU_SEPARATOR"//" "Request Sequences",0, http_seq_stats_tree_packet, http_seq_stats_tree_init, NULL((void*)0) );
5255 | stats_tree_set_first_column_name(st_config, "Sequence Type");
5256 |
5257 | dissector_add_uint("acdr.tls_application_port", 443, http_handle);
5258 | dissector_add_uint("acdr.tls_application", TLS_APP_HTTP, http_handle);
5259 | dissector_add_uint("acdr.tls_application", TLS_APP_TR069, http_handle);
5260 | dissector_add_uint("ippusb", 0, http_tcp_handle);
5261 | }
5262 |
5263 | /*
5264 | * Content-Type: message/http
5265 | */
5266 |
5267 | static int proto_message_http;
5268 | static int ett_message_http;
5269 |
5270 | static int
5271 | dissect_message_http(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U___attribute__((unused)))
5272 | {
5273 | proto_tree *subtree;
5274 | proto_item *ti;
5275 | unsigned offset = 0, next_offset;
5276 | unsigned len;
5277 | bool_Bool len_found;
5278 |
5279 | col_append_str(pinfo->cinfo, COL_INFO, " (message/http)");
5280 | if (tree) {
5281 | ti = proto_tree_add_item(tree, proto_message_http,
5282 | tvb, 0, -1, ENC_NA0x00000000);
5283 | subtree = proto_item_add_subtree(ti, ett_message_http);
5284 | while (tvb_offset_exists(tvb, offset)) {
5285 | len_found = tvb_find_line_end_length(tvb, offset,
5286 | tvb_ensure_captured_length_remaining(tvb, offset),
5287 | &len, &next_offset);
5288 | if (len_found == false0)
5289 | break;
5290 | proto_tree_add_format_text(subtree, tvb, offset, len);
5291 | offset = next_offset;
5292 | }
5293 | }
5294 | return tvb_captured_length(tvb);
5295 | }
5296 |
5297 | void
5298 | proto_register_message_http(void)
5299 | {
5300 | static int *ett[] = {
5301 | &ett_message_http,
5302 | };
5303 |
5304 | proto_message_http = proto_register_protocol("Media Type: message/http", "message/http", "message-http");
5305 | proto_register_subtree_array(ett, array_length(ett)(sizeof (ett) / sizeof (ett)[0]));
5306 | }
5307 |
5308 | void
5309 | proto_reg_handoff_message_http(void)
5310 | {
5311 | dissector_handle_t message_http_handle;
5312 |
5313 | message_http_handle = create_dissector_handle(dissect_message_http,
5314 | proto_message_http);
5315 |
5316 | dissector_add_string("media_type", "message/http", message_http_handle);
5317 |
5318 | heur_dissector_add("tcp", dissect_http_heur_tcp, "HTTP over TCP", "http_tcp", proto_http, HEURISTIC_ENABLE);
5319 | heur_dissector_add("tls", dissect_http_heur_tls, "HTTP over TLS", "http_tls", proto_http, HEURISTIC_ENABLE);
5320 |
5321 | proto_http2 = proto_get_id_by_filter_name("http2");
5322 |
5323 | dissector_add_uint_range_with_preference("tcp.port", TCP_DEFAULT_RANGE"80,3128,3132,5985,8080,8088,11371,1900,2869,2710", http_tcp_handle);
5324 | dissector_add_uint_range_with_preference("sctp.port", SCTP_DEFAULT_RANGE"80", http_sctp_handle);
5325 |
5326 | /*
5327 | * Get the content type and Internet media type table
5328 | */
5329 | media_type_subdissector_table = find_dissector_table("media_type");
5330 |
5331 | streaming_content_type_dissector_table = find_dissector_table("streaming_content_type");
5332 |
5333 | reinit_http();
5334 | }
5335 |
5336 | /*
5337 | * Editor modelines - https://www.wireshark.org/tools/modelines.html
5338 | *
5339 | * Local variables:
5340 | * c-basic-offset: 8
5341 | * tab-width: 8
5342 | * indent-tabs-mode: t
5343 | * End:
5344 | *
5345 | * vi: set shiftwidth=8 tabstop=8 noexpandtab:
5346 | * :indentSize=8:tabSize=8:noTabs=false:
5347 | */