### Bug Summary

File: | builds/wireshark/wireshark/epan/conversation.c
Warning: | line 3304, column 5 Null returned from a function that is expected to return a non-null value

### Annotated Source Code

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1 | /* conversation.c
2 | * Routines for building lists of packets that are part of a "conversation"
3 | *
4 | * Wireshark - Network traffic analyzer
5 | * By Gerald Combs <gerald@wireshark.org>
6 | * Copyright 1998 Gerald Combs
7 | *
8 | * SPDX-License-Identifier: GPL-2.0-or-later
9 | */
10 |
11 | #include "config.h"
12 |
13 | #include <string.h>
14 |
15 | #include <glib.h>
16 |
17 | #include <wiretap/wtap.h>
18 | #include <wsutil/array.h>
19 |
20 | #include <epan/packet.h>
21 | #include "to_str.h"
22 | #include "conversation.h"
23 |
24 | // The conversation database is a map of maps that contain conversation_t's.
25 | // Top-level map keys are strings that describe each conversation type.
26 | // Second-level map keys are conversation_element_t arrays.
27 | // {
28 | // "uint,endpoint": {
29 | // [ { type: CE_ADDR, addr_val: 10.20.30.40}, { type: CE_PORT, uint_val: 80 } ... ]: <conversation_t>
30 | // [ { type: CE_ADDR, addr_val: 1.1.1.1}, { type: CE_PORT, uint_val: 53 } ... ]: <conversation_t>
31 | // }
32 | // }
33 | // Instead of using strings as keys we could bit-shift conversation endpoint types
34 | // into a uint64_t, e.g. 0x0000000102010200 for CE_ADDRESS,CE_PORT,CE_ADDRESS,CE_PORT,CE_CONVERSATION_TYPE.
35 | // We could also use this to prepend a type+length indicator for element arrays.
36 |
37 | /* define DEBUG_CONVERSATION for pretty debug printing */
38 | /* #define DEBUG_CONVERSATION */
39 | #include "conversation_debug.h"
40 |
41 | #ifdef DEBUG_CONVERSATION
42 | int _debug_conversation_indent;
43 | #endif
44 |
45 | /*
46 | * We could use an element list here, but this is effectively a parameter list
47 | * for find_conversation and is more compact.
48 | */
49 | struct conversation_addr_port_endpoints {
50 | address addr1;
51 | address addr2;
52 | uint32_t port1;
53 | uint32_t port2;
54 | conversation_type ctype;
55 | };
56 |
57 | /* Element offsets for address+port conversations */
58 | enum {
59 | ADDR1_IDX,
60 | PORT1_IDX,
61 | ADDR2_IDX,
62 | PORT2_IDX,
63 | ENDP_EXACT_IDX,
64 | EXACT_IDX_COUNT,
65 | ADDRS_IDX_COUNT = PORT2_IDX,
66 | PORT2_NO_ADDR2_IDX = ADDR2_IDX,
67 | ENDP_NO_ADDR2_IDX = PORT2_IDX,
68 | ENDP_NO_PORT2_IDX = PORT2_IDX,
69 | ENDP_NO_ADDR2_PORT2_IDX = ADDR2_IDX,
70 | NO_ADDR2_IDX_COUNT = ENDP_EXACT_IDX,
71 | NO_PORT2_IDX_COUNT = ENDP_EXACT_IDX,
72 | NO_ADDR2_PORT2_IDX_COUNT = PORT2_IDX,
73 | ENDP_NO_PORTS_IDX = ADDR2_IDX,
74 | ERR_PKTS_COUNT = PORT2_IDX
75 | };
76 |
77 | /* Element offsets for the deinterlacer conversations */
78 | enum {
79 | DEINTR_ADDR1_IDX,
80 | DEINTR_ADDR2_IDX,
81 | DEINTR_KEY1_IDX,
82 | DEINTR_KEY2_IDX,
83 | DEINTR_KEY3_IDX,
84 | DEINTR_ENDP_IDX
85 | };
86 |
87 | /* Element offsets for the deinterlaced conversations */
88 | enum {
89 | DEINTD_ADDR1_IDX,
90 | DEINTD_ADDR2_IDX,
91 | DEINTD_PORT1_IDX,
92 | DEINTD_PORT2_IDX,
93 | DEINTD_ENDP_EXACT_IDX,
94 | DEINTD_EXACT_IDX_COUNT,
95 | DEINTD_ADDRS_IDX_COUNT = DEINTD_PORT2_IDX,
96 | DEINTD_ENDP_NO_PORTS_IDX = DEINTD_PORT1_IDX,
97 | DEINTD_NO_ADDR2_IDX_COUNT = DEINTD_EXACT_IDX_COUNT,
98 | DEINTD_NO_PORT2_IDX_COUNT = DEINTD_EXACT_IDX_COUNT,
99 | DEINTD_NO_ADDR2_PORT2_IDX_COUNT = DEINTD_ENDP_EXACT_IDX
100 | };
101 |
102 | /* Names for conversation_element_type values. */
103 | static const char * const type_names[] = {
104 | "endpoint",
105 | "address",
106 | "port",
107 | "string",
108 | "uint",
109 | "uint64",
110 | "int",
111 | "int64",
112 | "blob",
113 | };
114 |
115 | /*
116 | * Hash table of hash tables for conversations identified by element lists.
117 | */
118 | static wmem_map_t *conversation_hashtable_element_list;
119 |
120 | /*
121 | * Hash table for conversations based on addresses only
122 | */
123 | static wmem_map_t *conversation_hashtable_exact_addr;
124 |
125 | /*
126 | * Hash table for conversations with no wildcards.
127 | */
128 | static wmem_map_t *conversation_hashtable_exact_addr_port;
129 |
130 | /*
131 | * Hash table for conversations with one wildcard address.
132 | */
133 | static wmem_map_t *conversation_hashtable_no_addr2;
134 |
135 | /*
136 | * Hash table for conversations with one wildcard port.
137 | */
138 | static wmem_map_t *conversation_hashtable_no_port2;
139 |
140 | /*
141 | * Hash table for conversations with one wildcard address and port.
142 | */
143 | static wmem_map_t *conversation_hashtable_no_addr2_or_port2;
144 |
145 | /*
146 | * Hash table for conversations with a single unsigned ID number.
147 | */
148 | static wmem_map_t *conversation_hashtable_id;
149 |
150 | /*
151 | * Hash table for conversations with no wildcards, and an anchor
152 | */
153 | static wmem_map_t *conversation_hashtable_exact_addr_port_anc = NULL((void*)0);
154 |
155 | /*
156 | * Hash table for conversations based on addresses only, and an anchor
157 | */
158 | static wmem_map_t *conversation_hashtable_exact_addr_anc = NULL((void*)0);
159 |
160 | /*
161 | * Hash table for conversations with one wildcard address, and an anchor
162 | */
163 | static wmem_map_t *conversation_hashtable_no_addr2_anc = NULL((void*)0);
164 |
165 | /*
166 | * Hash table for conversations with one wildcard port, and an anchor
167 | */
168 | static wmem_map_t *conversation_hashtable_no_port2_anc = NULL((void*)0);
169 |
170 | /*
171 | * Hash table for conversations with one wildcard address and port, and an anchor.
172 | */
173 | static wmem_map_t *conversation_hashtable_no_addr2_or_port2_anc;
174 |
175 | /*
176 | * Hash table for deinterlacing conversations (typically L1 or L2)
177 | */
178 | static wmem_map_t *conversation_hashtable_deinterlacer = NULL((void*)0);
179 |
180 | /*
181 | * Hash table for tracking conversations involved in error packets.
182 | * Conversations stored here don't have an autonomous existence,
183 | * strictly speaking, but are a reference to other ones stored in
184 | * other tables (such as conversation_hashtable_exact_addr_port).
185 | * This table should be understood as an outgrowth of other tables.
186 | * Note on this table keys: they are composed of 3 elements:
187 | * id : the conv_index for this conversation in this table
188 | * rid : reference conv_index for the transport conversation
189 | * stored in table conversation_hashtable_exact_addr_port
190 | * ctype: conversation type of the transport conversation
191 | */
192 | static wmem_map_t *conversation_hashtable_err_pkts = NULL((void*)0);
193 |
194 | static uint32_t new_index;
195 |
196 | /*
197 | * Placeholder for address-less conversations.
198 | */
199 | static address null_address_ = ADDRESS_INIT_NONE{AT_NONE, 0, ((void*)0), ((void*)0)};
200 |
201 |
202 | /* Element count including the terminating CE_CONVERSATION_TYPE */
203 | #define MAX_CONVERSATION_ELEMENTS8 8 // Arbitrary.
204 | static size_t
205 | conversation_element_count(conversation_element_t *elements)
206 | {
207 | size_t count = 0;
208 | while (elements[count].type != CE_CONVERSATION_TYPE) {
209 | count++;
210 | DISSECTOR_ASSERT(count < MAX_CONVERSATION_ELEMENTS)((void) ((count < 8) ? (void)0 : (proto_report_dissector_bug ("%s:%u: failed assertion \"%s\"", "epan/conversation.c", 210 , "count < 8"))));
211 | }
212 | count++;
213 | // Keying on the endpoint type alone isn't very useful.
214 | DISSECTOR_ASSERT(count > 1)((void) ((count > 1) ? (void)0 : (proto_report_dissector_bug ("%s:%u: failed assertion \"%s\"", "epan/conversation.c", 214 , "count > 1"))));
215 | return count;
216 | }
217 |
218 | static conversation_type
219 | conversation_get_key_type(conversation_element_t *elements)
220 | {
221 | size_t count = 0;
222 | while (elements[count].type != CE_CONVERSATION_TYPE) {
223 | count++;
224 | DISSECTOR_ASSERT(count < MAX_CONVERSATION_ELEMENTS)((void) ((count < 8) ? (void)0 : (proto_report_dissector_bug ("%s:%u: failed assertion \"%s\"", "epan/conversation.c", 224 , "count < 8"))));
225 | }
226 | return elements[count].conversation_type_val;
227 | }
228 |
229 | /* Create a string based on element types. */
230 | static char*
231 | conversation_element_list_name(wmem_allocator_t *allocator, conversation_element_t *elements) {
232 | char *sep = "";
233 | wmem_strbuf_t *conv_hash_group = wmem_strbuf_new(allocator, "");
234 | size_t element_count = conversation_element_count(elements);
235 | for (size_t i = 0; i < element_count; i++) {
236 | conversation_element_t *cur_el = &elements[i];
237 | DISSECTOR_ASSERT(cur_el->type < array_length(type_names))((void) ((cur_el->type < (sizeof (type_names) / sizeof ( type_names)[0])) ? (void)0 : (proto_report_dissector_bug("%s:%u: failed assertion \"%s\"" , "epan/conversation.c", 237, "cur_el->type < (sizeof (type_names) / sizeof (type_names)[0])" ))));
238 | wmem_strbuf_append_printf(conv_hash_group, "%s%s", sep, type_names[cur_el->type]);
239 | sep = ",";
240 | }
241 | return wmem_strbuf_finalize(conv_hash_group);
242 | }
243 |
244 | #if 0 // debugging
245 | static char* conversation_element_list_values(conversation_element_t *elements) {
246 | char *sep = "";
247 | GString *value_str = g_string_new("");
248 | size_t element_count = conversation_element_count(elements);
249 | for (size_t i = 0; i < element_count; i++) {
250 | conversation_element_t *cur_el = &elements[i];
251 | g_string_append_printf(value_str, "%s%s=", sep, type_names[cur_el->type]);
252 | sep = ",";
253 | switch (cur_el->type) {
254 | case CE_CONVERSATION_TYPE:
255 | g_string_append_printf(value_str, "%d", cur_el->conversation_type_val);
256 | break;
257 | case CE_ADDRESS:
258 | {
259 | char *as = address_to_str(NULL((void*)0), &cur_el->addr_val);
260 | g_string_append(value_str, as)(__builtin_constant_p (as) ? __extension__ ({ const char * const __val = (as); g_string_append_len_inline (value_str, __val, ( __val != ((void*)0)) ? (gssize) strlen (((__val) + !(__val))) : (gssize) -1); }) : g_string_append_len_inline (value_str, as , (gssize) -1));
261 | g_free(as)(__builtin_object_size ((as), 0) != ((size_t) - 1)) ? g_free_sized (as, __builtin_object_size ((as), 0)) : (g_free) (as);
262 | }
263 | break;
264 | case CE_PORT:
265 | g_string_append_printf(value_str, "%u", cur_el->port_val);
266 | break;
267 | case CE_STRING:
268 | g_string_append(value_str, cur_el->str_val)(__builtin_constant_p (cur_el->str_val) ? __extension__ ({ const char * const __val = (cur_el->str_val); g_string_append_len_inline (value_str, __val, (__val != ((void*)0)) ? (gssize) strlen ( ((__val) + !(__val))) : (gssize) -1); }) : g_string_append_len_inline (value_str, cur_el->str_val, (gssize) -1));
269 | break;
270 | case CE_UINT:
271 | g_string_append_printf(value_str, "%u", cur_el->uint_val);
272 | break;
273 | case CE_UINT64:
274 | g_string_append_printf(value_str, "%" PRIu64"l" "u", cur_el->uint64_val);
275 | break;
276 | case CE_INT:
277 | g_string_append_printf(value_str, "%d", cur_el->int_val);
278 | break;
279 | case CE_INT64:
280 | g_string_append_printf(value_str, "%" PRId64"l" "d", cur_el->int64_val);
281 | break;
282 | case CE_BLOB:
283 | {
284 | size_t l;
285 | uint8_t const *p;
286 | for (l = cur_el->blob.len, p = cur_el->blob.val; l > 0; l--, p++)
287 | g_string_append_printf(value_str, "%02x", *p);
288 | }
289 | break;
290 | }
291 | }
292 | return g_string_free(value_str, FALSE)(__builtin_constant_p ((0)) ? (((0)) ? (g_string_free) ((value_str ), ((0))) : g_string_free_and_steal (value_str)) : (g_string_free ) ((value_str), ((0))));
293 | }
294 | #endif
295 |
296 | static bool_Bool
297 | is_no_addr2_key(conversation_element_t *key)
298 | {
299 | if (key[ADDR1_IDX].type == CE_ADDRESS && key[PORT1_IDX].type == CE_PORT
300 | && key[PORT2_NO_ADDR2_IDX].type == CE_PORT && key[ENDP_NO_ADDR2_IDX].type == CE_CONVERSATION_TYPE) {
301 | return true1;
302 | }
303 | return false0;
304 | }
305 |
306 | static bool_Bool
307 | is_no_port2_key(conversation_element_t *key)
308 | {
309 | if (key[ADDR1_IDX].type == CE_ADDRESS && key[PORT1_IDX].type == CE_PORT
310 | && key[ADDR2_IDX].type == CE_ADDRESS && key[ENDP_NO_PORT2_IDX].type == CE_CONVERSATION_TYPE) {
311 | return true1;
312 | }
313 | return false0;
314 | }
315 |
316 | static bool_Bool
317 | is_no_addr2_port2_key(conversation_element_t *key)
318 | {
319 | if (key[ADDR1_IDX].type == CE_ADDRESS && key[PORT1_IDX].type == CE_PORT
320 | && key[ENDP_NO_ADDR2_PORT2_IDX].type == CE_CONVERSATION_TYPE) {
321 | return true1;
322 | }
323 | return false0;
324 | }
325 |
326 | /*
327 | * Creates a new conversation with known endpoints based on a conversation
328 | * created with the CONVERSATION_TEMPLATE option while keeping the
329 | * conversation created with the CONVERSATION_TEMPLATE option so it can still
330 | * match future connections.
331 | *
332 | * Passing a pointer to a conversation whose options mask does not include
333 | * CONVERSATION_TEMPLATE or where the conversation's protocol type (ptype)
334 | * indicates a non-connection oriented protocol will return the conversation
335 | * without changes.
336 | *
337 | * addr2 and port2 are used in the function if their respective conversation
338 | * options bits are set (NO_ADDR2 and NO_PORT2).
339 | */
340 | static conversation_t *
341 | conversation_create_from_template(conversation_t *conversation, const address *addr2, const uint32_t port2)
342 | {
343 | conversation_type ctype = conversation_get_key_type(conversation->key_ptr);
344 | /*
345 | * Add a new conversation and keep the conversation template only if the
346 | * CONVERSATION_TEMPLATE bit is set for a connection oriented protocol.
347 | */
348 | if (conversation->options & CONVERSATION_TEMPLATE0x08 && ctype != CONVERSATION_UDP)
349 | {
350 | /*
351 | * Set up a new options mask where the conversation template bit and the
352 | * bits for absence of a second address and port pair have been removed.
353 | */
354 | conversation_t *new_conversation_from_template;
355 | unsigned options = conversation->options & ~(CONVERSATION_TEMPLATE0x08 | NO_ADDR20x01 | NO_PORT20x02);
356 |
357 | /*
358 | * Are both the NO_ADDR2 and NO_PORT2 wildcards set in the options mask?
359 | */
360 | if (conversation->options & NO_ADDR20x01 && conversation->options & NO_PORT20x02
361 | && is_no_addr2_port2_key(conversation->key_ptr))
362 | {
363 | /*
364 | * The conversation template was created without knowledge of both
365 | * the second address as well as the second port. Create a new
366 | * conversation with new 2nd address and 2nd port.
367 | */
368 | new_conversation_from_template =
369 | conversation_new(conversation->setup_frame,
370 | &conversation->key_ptr[ADDR1_IDX].addr_val, addr2,
371 | ctype, conversation->key_ptr[PORT1_IDX].port_val,
372 | port2, options);
373 | }
374 | else if (conversation->options & NO_PORT20x02 && is_no_port2_key(conversation->key_ptr))
375 | {
376 | /*
377 | * The conversation template was created without knowledge of port 2
378 | * only. Create a new conversation with new 2nd port.
379 | */
380 | new_conversation_from_template =
381 | conversation_new(conversation->setup_frame,
382 | &conversation->key_ptr[ADDR1_IDX].addr_val, &conversation->key_ptr[ADDR2_IDX].addr_val,
383 | ctype, conversation->key_ptr[PORT1_IDX].port_val,
384 | port2, options);
385 | }
386 | else if (conversation->options & NO_ADDR20x01 && is_no_addr2_key(conversation->key_ptr))
387 | {
388 | /*
389 | * The conversation template was created without knowledge of address
390 | * 2. Create a new conversation with new 2nd address.
391 | */
392 | new_conversation_from_template =
393 | conversation_new(conversation->setup_frame,
394 | &conversation->key_ptr[ADDR1_IDX].addr_val, addr2,
395 | ctype, conversation->key_ptr[PORT1_IDX].port_val,
396 | conversation->key_ptr[PORT2_NO_ADDR2_IDX].port_val, options);
397 | }
398 | else
399 | {
400 | /*
401 | * The CONVERSATION_TEMPLATE bit was set, but no other bit that the
402 | * CONVERSATION_TEMPLATE bit controls is active. Just return the old
403 | * conversation.
404 | */
405 | return conversation;
406 | }
407 |
408 | /*
409 | * Set the protocol dissector used for the template conversation as
410 | * the handler of the new conversation as well.
411 | */
412 | new_conversation_from_template->dissector_tree = conversation->dissector_tree;
413 |
414 | return new_conversation_from_template;
415 | }
416 | else
417 | {
418 | return conversation;
419 | }
420 | }
421 |
422 | /*
423 | * Compute the hash value for two given element lists if the match
424 | * is to be exact.
425 | */
426 | /* https://web.archive.org/web/20070615045827/http://eternallyconfuzzled.com/tuts/algorithms/jsw_tut_hashing.aspx#existing
427 | * (formerly at http://eternallyconfuzzled.com/tuts/algorithms/jsw_tut_hashing.aspx#existing)
428 | * One-at-a-Time hash
429 | */
430 | static unsigned
431 | conversation_hash_element_list(const void *v)
432 | {
433 | const conversation_element_t *element = (const conversation_element_t*)v;
434 | unsigned hash_val = 0;
435 |
436 | for (;;) {
437 | // XXX We could use a hash_arbitrary_bytes routine. Abuse add_address_to_hash in the mean time.
438 | address tmp_addr;
439 | switch (element->type) {
440 | case CE_ADDRESS:
441 | hash_val = add_address_to_hash(hash_val, &element->addr_val);
442 | break;
443 | case CE_PORT:
444 | tmp_addr.len = (int) sizeof(element->port_val);
445 | tmp_addr.data = &element->port_val;
446 | hash_val = add_address_to_hash(hash_val, &tmp_addr);
447 | break;
448 | case CE_STRING:
449 | tmp_addr.len = (int) strlen(element->str_val);
450 | tmp_addr.data = element->str_val;
451 | hash_val = add_address_to_hash(hash_val, &tmp_addr);
452 | break;
453 | case CE_UINT:
454 | tmp_addr.len = (int) sizeof(element->uint_val);
455 | tmp_addr.data = &element->uint_val;
456 | hash_val = add_address_to_hash(hash_val, &tmp_addr);
457 | break;
458 | case CE_UINT64:
459 | tmp_addr.len = (int) sizeof(element->uint64_val);
460 | tmp_addr.data = &element->uint64_val;
461 | hash_val = add_address_to_hash(hash_val, &tmp_addr);
462 | break;
463 | case CE_INT:
464 | tmp_addr.len = (int) sizeof(element->int_val);
465 | tmp_addr.data = &element->int_val;
466 | hash_val = add_address_to_hash(hash_val, &tmp_addr);
467 | break;
468 | case CE_INT64:
469 | tmp_addr.len = (int) sizeof(element->int64_val);
470 | tmp_addr.data = &element->int64_val;
471 | hash_val = add_address_to_hash(hash_val, &tmp_addr);
472 | break;
473 | case CE_BLOB:
474 | tmp_addr.len = (int) element->blob.len;
475 | tmp_addr.data = element->blob.val;
476 | hash_val = add_address_to_hash(hash_val, &tmp_addr);
477 | break;
478 | case CE_CONVERSATION_TYPE:
479 | tmp_addr.len = (int) sizeof(element->conversation_type_val);
480 | tmp_addr.data = &element->conversation_type_val;
481 | hash_val = add_address_to_hash(hash_val, &tmp_addr);
482 | goto done;
483 | break;
484 | }
485 | element++;
486 | }
487 |
488 | done:
489 | hash_val += ( hash_val << 3 );
490 | hash_val ^= ( hash_val >> 11 );
491 | hash_val += ( hash_val << 15 );
492 |
493 | return hash_val;
494 | }
495 |
496 | /*
497 | * Compare two conversation keys for an exact match.
498 | */
499 | static gboolean
500 | conversation_match_element_list(const void *v1, const void *v2)
501 | {
502 | const conversation_element_t *element1 = (const conversation_element_t*)v1;
503 | const conversation_element_t *element2 = (const conversation_element_t*)v2;
504 |
505 | for (;;) {
506 | if (element1->type != element2->type) {
507 | return FALSE(0);
508 | }
509 |
510 | switch (element1->type) {
511 | case CE_ADDRESS:
512 | if (!addresses_equal(&element1->addr_val, &element2->addr_val)) {
513 | return FALSE(0);
514 | }
515 | break;
516 | case CE_PORT:
517 | if (element1->port_val != element2->port_val) {
518 | return FALSE(0);
519 | }
520 | break;
521 | case CE_STRING:
522 | if (strcmp(element1->str_val, element2->str_val)) {
523 | return FALSE(0);
524 | }
525 | break;
526 | case CE_UINT:
527 | if (element1->uint_val != element2->uint_val) {
528 | return FALSE(0);
529 | }
530 | break;
531 | case CE_UINT64:
532 | if (element1->uint64_val != element2->uint64_val) {
533 | return FALSE(0);
534 | }
535 | break;
536 | case CE_INT:
537 | if (element1->int_val != element2->int_val) {
538 | return FALSE(0);
539 | }
540 | break;
541 | case CE_INT64:
542 | if (element1->int64_val != element2->int64_val) {
543 | return FALSE(0);
544 | }
545 | break;
546 | case CE_BLOB:
547 | if (element1->blob.len != element2->blob.len ||
548 | (element1->blob.len > 0 && memcmp(element1->blob.val, element2->blob.val, element1->blob.len) != 0)) {
549 | return FALSE(0);
550 | }
551 | break;
552 | case CE_CONVERSATION_TYPE:
553 | if (element1->conversation_type_val != element2->conversation_type_val) {
554 | return FALSE(0);
555 | }
556 | goto done;
557 | break;
558 | }
559 | element1++;
560 | element2++;
561 | }
562 |
563 | done:
564 | // Everything matched so far.
565 | return TRUE(!(0));
566 | }
567 |
568 | /**
569 | * Create a new hash tables for conversations.
570 | */
571 | void
572 | conversation_init(void)
573 | {
574 | /*
575 | * Free up any space allocated for conversation protocol data
576 | * areas.
577 | *
578 | * We can free the space, as the structures it contains are
579 | * pointed to by conversation data structures that were freed
580 | * above.
581 | */
582 | conversation_hashtable_element_list = wmem_map_new(wmem_epan_scope(), wmem_str_hash, g_str_equal);
583 |
584 | conversation_element_t exact_elements[EXACT_IDX_COUNT] = {
585 | { CE_ADDRESS, .addr_val = ADDRESS_INIT_NONE{AT_NONE, 0, ((void*)0), ((void*)0)} },
586 | { CE_PORT, .port_val = 0 },
587 | { CE_ADDRESS, .addr_val = ADDRESS_INIT_NONE{AT_NONE, 0, ((void*)0), ((void*)0)} },
588 | { CE_PORT, .port_val = 0 },
589 | { CE_CONVERSATION_TYPE, .conversation_type_val = CONVERSATION_NONE }
590 | };
591 | char *exact_map_key = conversation_element_list_name(wmem_epan_scope(), exact_elements);
592 | conversation_hashtable_exact_addr_port = wmem_map_new_autoreset(wmem_epan_scope(), wmem_file_scope(),
593 | conversation_hash_element_list,
594 | conversation_match_element_list);
595 | wmem_map_insert(conversation_hashtable_element_list, wmem_strdup(wmem_epan_scope(), exact_map_key),
596 | conversation_hashtable_exact_addr_port);
597 |
598 | conversation_element_t addrs_elements[ADDRS_IDX_COUNT] = {
599 | { CE_ADDRESS, .addr_val = ADDRESS_INIT_NONE{AT_NONE, 0, ((void*)0), ((void*)0)} },
600 | { CE_ADDRESS, .addr_val = ADDRESS_INIT_NONE{AT_NONE, 0, ((void*)0), ((void*)0)} },
601 | { CE_CONVERSATION_TYPE, .conversation_type_val = CONVERSATION_NONE }
602 | };
603 | char *addrs_map_key = conversation_element_list_name(wmem_epan_scope(), addrs_elements);
604 | conversation_hashtable_exact_addr = wmem_map_new_autoreset(wmem_epan_scope(), wmem_file_scope(),
605 | conversation_hash_element_list,
606 | conversation_match_element_list);
607 | wmem_map_insert(conversation_hashtable_element_list, wmem_strdup(wmem_epan_scope(), addrs_map_key),
608 | conversation_hashtable_exact_addr);
609 |
610 | conversation_element_t no_addr2_elements[NO_ADDR2_IDX_COUNT] = {
611 | { CE_ADDRESS, .addr_val = ADDRESS_INIT_NONE{AT_NONE, 0, ((void*)0), ((void*)0)} },
612 | { CE_PORT, .port_val = 0 },
613 | { CE_PORT, .port_val = 0 },
614 | { CE_CONVERSATION_TYPE, .conversation_type_val = CONVERSATION_NONE }
615 | };
616 | char *no_addr2_map_key = conversation_element_list_name(wmem_epan_scope(), no_addr2_elements);
617 | conversation_hashtable_no_addr2 = wmem_map_new_autoreset(wmem_epan_scope(), wmem_file_scope(),
618 | conversation_hash_element_list,
619 | conversation_match_element_list);
620 | wmem_map_insert(conversation_hashtable_element_list, wmem_strdup(wmem_epan_scope(), no_addr2_map_key),
621 | conversation_hashtable_no_addr2);
622 |
623 | conversation_element_t no_port2_elements[NO_PORT2_IDX_COUNT] = {
624 | { CE_ADDRESS, .addr_val = ADDRESS_INIT_NONE{AT_NONE, 0, ((void*)0), ((void*)0)} },
625 | { CE_PORT, .port_val = 0 },
626 | { CE_ADDRESS, .addr_val = ADDRESS_INIT_NONE{AT_NONE, 0, ((void*)0), ((void*)0)} },
627 | { CE_CONVERSATION_TYPE, .conversation_type_val = CONVERSATION_NONE }
628 | };
629 | char *no_port2_map_key = conversation_element_list_name(wmem_epan_scope(), no_port2_elements);
630 | conversation_hashtable_no_port2 = wmem_map_new_autoreset(wmem_epan_scope(), wmem_file_scope(),
631 | conversation_hash_element_list,
632 | conversation_match_element_list);
633 | wmem_map_insert(conversation_hashtable_element_list, wmem_strdup(wmem_epan_scope(), no_port2_map_key),
634 | conversation_hashtable_no_port2);
635 |
636 | conversation_element_t no_addr2_or_port2_elements[NO_ADDR2_PORT2_IDX_COUNT] = {
637 | { CE_ADDRESS, .addr_val = ADDRESS_INIT_NONE{AT_NONE, 0, ((void*)0), ((void*)0)} },
638 | { CE_PORT, .port_val = 0 },
639 | { CE_CONVERSATION_TYPE, .conversation_type_val = CONVERSATION_NONE }
640 | };
641 | char *no_addr2_or_port2_map_key = conversation_element_list_name(wmem_epan_scope(), no_addr2_or_port2_elements);
642 | conversation_hashtable_no_addr2_or_port2 = wmem_map_new_autoreset(wmem_epan_scope(), wmem_file_scope(),
643 | conversation_hash_element_list,
644 | conversation_match_element_list);
645 | wmem_map_insert(conversation_hashtable_element_list, wmem_strdup(wmem_epan_scope(), no_addr2_or_port2_map_key),
646 | conversation_hashtable_no_addr2_or_port2);
647 |
648 | conversation_element_t id_elements[2] = {
649 | { CE_UINT, .uint_val = 0 },
650 | { CE_CONVERSATION_TYPE, .conversation_type_val = CONVERSATION_NONE }
651 | };
652 | char *id_map_key = conversation_element_list_name(wmem_epan_scope(), id_elements);
653 | conversation_hashtable_id = wmem_map_new_autoreset(wmem_epan_scope(), wmem_file_scope(),
654 | conversation_hash_element_list,
655 | conversation_match_element_list);
656 | wmem_map_insert(conversation_hashtable_element_list, wmem_strdup(wmem_epan_scope(), id_map_key),
657 | conversation_hashtable_id);
658 |
659 | /*
660 | * Initialize the "deinterlacer" table, which is used as the basis for the
661 | * deinterlacing process, and in conjunction with the "anchor" tables
662 | *
663 | * Typically the elements are:
664 | * ETH address 1
665 | * ETH address 2
666 | * Interface id
667 | * VLAN id
668 | * not used yet
669 | *
670 | * By the time of implementation, these table is invoked through the
671 | * conversation_deinterlacing_key user preference.
672 | */
673 | conversation_element_t deinterlacer_elements[EXACT_IDX_COUNT+1] = {
674 | { CE_ADDRESS, .addr_val = ADDRESS_INIT_NONE{AT_NONE, 0, ((void*)0), ((void*)0)} },
675 | { CE_ADDRESS, .addr_val = ADDRESS_INIT_NONE{AT_NONE, 0, ((void*)0), ((void*)0)} },
676 | { CE_UINT, .port_val = 0 },
677 | { CE_UINT, .port_val = 0 },
678 | { CE_UINT, .uint_val = 0 },
679 | { CE_CONVERSATION_TYPE, .conversation_type_val = CONVERSATION_NONE }
680 | };
681 | char *deinterlacer_map_key = conversation_element_list_name(wmem_epan_scope(), deinterlacer_elements);
682 | conversation_hashtable_deinterlacer = wmem_map_new_autoreset(wmem_epan_scope(), wmem_file_scope(),
683 | conversation_hash_element_list,
684 | conversation_match_element_list);
685 | wmem_map_insert(conversation_hashtable_element_list, wmem_strdup(wmem_epan_scope(), deinterlacer_map_key),
686 | conversation_hashtable_deinterlacer);
687 |
688 | /*
689 | * Initialize the "_anc" tables, which are very similar to their standard counterparts
690 | * but contain an additional "anchor" materialized as an integer. This value is supposed
691 | * to indicate a stream ID of the underlying protocol, thus attaching two conversations
692 | * of two protocols together.
693 | *
694 | * By the time of implementation, these table is invoked through the
695 | * conversation_deinterlacing_key user preference.
696 | */
697 | conversation_element_t exact_elements_anc[EXACT_IDX_COUNT+1] = {
698 | { CE_ADDRESS, .addr_val = ADDRESS_INIT_NONE{AT_NONE, 0, ((void*)0), ((void*)0)} },
699 | { CE_ADDRESS, .addr_val = ADDRESS_INIT_NONE{AT_NONE, 0, ((void*)0), ((void*)0)} },
700 | { CE_PORT, .port_val = 0 },
701 | { CE_PORT, .port_val = 0 },
702 | { CE_UINT, .uint_val = 0 },
703 | { CE_CONVERSATION_TYPE, .conversation_type_val = CONVERSATION_NONE }
704 | };
705 | char *exact_anc_map_key = conversation_element_list_name(wmem_epan_scope(), exact_elements_anc);
706 | conversation_hashtable_exact_addr_port_anc = wmem_map_new_autoreset(wmem_epan_scope(), wmem_file_scope(),
707 | conversation_hash_element_list,
708 | conversation_match_element_list);
709 | wmem_map_insert(conversation_hashtable_element_list, wmem_strdup(wmem_epan_scope(), exact_anc_map_key),
710 | conversation_hashtable_exact_addr_port_anc);
711 |
712 | conversation_element_t addrs_elements_anc[ADDRS_IDX_COUNT+1] = {
713 | { CE_ADDRESS, .addr_val = ADDRESS_INIT_NONE{AT_NONE, 0, ((void*)0), ((void*)0)} },
714 | { CE_ADDRESS, .addr_val = ADDRESS_INIT_NONE{AT_NONE, 0, ((void*)0), ((void*)0)} },
715 | { CE_UINT, .uint_val = 0 },
716 | { CE_CONVERSATION_TYPE, .conversation_type_val = CONVERSATION_NONE }
717 | };
718 | char *addrs_anc_map_key = conversation_element_list_name(wmem_epan_scope(), addrs_elements_anc);
719 | conversation_hashtable_exact_addr_anc = wmem_map_new_autoreset(wmem_epan_scope(), wmem_file_scope(),
720 | conversation_hash_element_list,
721 | conversation_match_element_list);
722 | wmem_map_insert(conversation_hashtable_element_list, wmem_strdup(wmem_epan_scope(), addrs_anc_map_key),
723 | conversation_hashtable_exact_addr_anc);
724 |
725 | conversation_element_t no_addr2_elements_anc[DEINTD_NO_PORT2_IDX_COUNT] = {
726 | { CE_ADDRESS, .addr_val = ADDRESS_INIT_NONE{AT_NONE, 0, ((void*)0), ((void*)0)} },
727 | { CE_PORT, .port_val = 0 },
728 | { CE_PORT, .port_val = 0 },
729 | { CE_UINT, .uint_val = 0 },
730 | { CE_CONVERSATION_TYPE, .conversation_type_val = CONVERSATION_NONE }
731 | };
732 | char *no_addr2_anc_map_key = conversation_element_list_name(wmem_epan_scope(), no_addr2_elements_anc);
733 | conversation_hashtable_no_addr2_anc = wmem_map_new_autoreset(wmem_epan_scope(), wmem_file_scope(),
734 | conversation_hash_element_list,
735 | conversation_match_element_list);
736 | wmem_map_insert(conversation_hashtable_element_list, wmem_strdup(wmem_epan_scope(), no_addr2_anc_map_key),
737 | conversation_hashtable_no_addr2_anc);
738 |
739 | conversation_element_t no_port2_elements_anc[DEINTD_NO_PORT2_IDX_COUNT] = {
740 | { CE_ADDRESS, .addr_val = ADDRESS_INIT_NONE{AT_NONE, 0, ((void*)0), ((void*)0)} },
741 | { CE_ADDRESS, .addr_val = ADDRESS_INIT_NONE{AT_NONE, 0, ((void*)0), ((void*)0)} },
742 | { CE_PORT, .port_val = 0 },
743 | { CE_UINT, .uint_val = 0 },
744 | { CE_CONVERSATION_TYPE, .conversation_type_val = CONVERSATION_NONE }
745 | };
746 | char *no_port2_anc_map_key = conversation_element_list_name(wmem_epan_scope(), no_port2_elements_anc);
747 | conversation_hashtable_no_port2_anc = wmem_map_new_autoreset(wmem_epan_scope(), wmem_file_scope(),
748 | conversation_hash_element_list,
749 | conversation_match_element_list);
750 | wmem_map_insert(conversation_hashtable_element_list, wmem_strdup(wmem_epan_scope(), no_port2_anc_map_key),
751 | conversation_hashtable_no_port2_anc);
752 |
753 | conversation_element_t no_addr2_or_port2_elements_anc[DEINTD_NO_ADDR2_PORT2_IDX_COUNT] = {
754 | { CE_ADDRESS, .addr_val = ADDRESS_INIT_NONE{AT_NONE, 0, ((void*)0), ((void*)0)} },
755 | { CE_PORT, .port_val = 0 },
756 | { CE_UINT, .uint_val = 0 },
757 | { CE_CONVERSATION_TYPE, .conversation_type_val = CONVERSATION_NONE }
758 | };
759 | char *no_addr2_or_port2_anc_map_key = conversation_element_list_name(wmem_epan_scope(), no_addr2_or_port2_elements_anc);
760 | conversation_hashtable_no_addr2_or_port2_anc = wmem_map_new_autoreset(wmem_epan_scope(), wmem_file_scope(),
761 | conversation_hash_element_list,
762 | conversation_match_element_list);
763 | wmem_map_insert(conversation_hashtable_element_list, wmem_strdup(wmem_epan_scope(), no_addr2_or_port2_anc_map_key),
764 | conversation_hashtable_no_addr2_or_port2_anc);
765 |
766 | conversation_element_t err_pkts_elements[ERR_PKTS_COUNT] = {
767 | { CE_UINT, .uint_val = 0 },
768 | { CE_UINT, .uint_val = 0 },
769 | { CE_CONVERSATION_TYPE, .conversation_type_val = CONVERSATION_NONE }
770 | };
771 | char *err_pkts_map_key = conversation_element_list_name(wmem_epan_scope(), err_pkts_elements);
772 | conversation_hashtable_err_pkts = wmem_map_new_autoreset(wmem_epan_scope(), wmem_file_scope(),
773 | conversation_hash_element_list,
774 | conversation_match_element_list);
775 | wmem_map_insert(conversation_hashtable_element_list, wmem_strdup(wmem_epan_scope(), err_pkts_map_key),
776 | conversation_hashtable_err_pkts);
777 |
778 | }
779 |
780 | /**
781 | * Initialize some variables every time a file is loaded or re-loaded.
782 | */
783 | void
784 | conversation_epan_reset(void)
785 | {
786 | /*
787 | * Start the conversation indices over at 0.
788 | */
789 | new_index = 0;
790 | }
791 |
792 | /*
793 | * Does the right thing when inserting into one of the conversation hash tables,
794 | * taking into account ordering and hash chains and all that good stuff.
795 | *
796 | * Mostly adapted from the old conversation_new().
797 | */
798 | static void
799 | conversation_insert_into_hashtable(wmem_map_t *hashtable, conversation_t *conv)
800 | {
801 | conversation_t *chain_head, *chain_tail, *cur, *prev;
802 |
803 | chain_head = (conversation_t *)wmem_map_lookup(hashtable, conv->key_ptr);
804 |
805 | if (NULL((void*)0)==chain_head) {
806 | /* New entry */
807 | conv->next = NULL((void*)0);
808 | conv->last = conv;
809 |
810 | wmem_map_insert(hashtable, conv->key_ptr, conv);
811 | DPRINT(("created a new conversation chain"))(void)0;
812 | }
813 | else {
814 | /* There's an existing chain for this key */
815 | DPRINT(("there's an existing conversation chain"))(void)0;
816 |
817 | chain_tail = chain_head->last;
818 |
819 | if (conv->setup_frame >= chain_tail->setup_frame) {
820 | /* This convo belongs at the end of the chain */
821 | conv->next = NULL((void*)0);
822 | conv->last = NULL((void*)0);
823 | chain_tail->next = conv;
824 | chain_head->last = conv;
825 | }
826 | else {
827 | /* Loop through the chain to find the right spot */
828 | cur = chain_head;
829 | prev = NULL((void*)0);
830 |
831 | for (; (conv->setup_frame > cur->setup_frame) && cur->next; prev=cur, cur=cur->next)
832 | ;
833 |
834 | if (NULL((void*)0)==prev) {
835 | /* Changing the head of the chain */
836 | conv->next = chain_head;
837 | conv->last = chain_tail;
838 | chain_head->last = NULL((void*)0);
839 | wmem_map_insert(hashtable, conv->key_ptr, conv);
840 | }
841 | else {
842 | /* Inserting into the middle of the chain */
843 | conv->next = cur;
844 | conv->last = NULL((void*)0);
845 | prev->next = conv;
846 | }
847 | }
848 | }
849 | }
850 |
851 | /*
852 | * Does the right thing when removing from one of the conversation hash tables,
853 | * taking into account ordering and hash chains and all that good stuff.
854 | */
855 | static void
856 | conversation_remove_from_hashtable(wmem_map_t *hashtable, conversation_t *conv)
857 | {
858 | conversation_t *chain_head, *cur, *prev;
859 |
860 | chain_head = (conversation_t *)wmem_map_lookup(hashtable, conv->key_ptr);
861 |
862 | if (conv == chain_head) {
863 | /* We are currently the front of the chain */
864 | if (NULL((void*)0) == conv->next) {
865 | /* We are the only conversation in the chain, no need to
866 | * update next pointer, but do not call
867 | * wmem_map_remove() either because the conv data
868 | * will be re-inserted. */
869 | wmem_map_steal(hashtable, conv->key_ptr);
870 | }
871 | else {
872 | /* Update the head of the chain */
873 | chain_head = conv->next;
874 | chain_head->last = conv->last;
875 |
876 | if (conv->latest_found == conv)
877 | chain_head->latest_found = NULL((void*)0);
878 | else
879 | chain_head->latest_found = conv->latest_found;
880 |
881 | wmem_map_insert(hashtable, chain_head->key_ptr, chain_head);
882 | }
883 | }
884 | else {
885 | /* We are not the front of the chain. Loop through to find us.
886 | * Start loop at chain_head->next rather than chain_head because
887 | * we already know we're not at the head. */
888 | cur = chain_head->next;
889 | prev = chain_head;
890 |
891 | for (; (cur != conv) && cur->next; prev=cur, cur=cur->next)
892 | ;
893 |
894 | if (cur != conv) {
895 | /* XXX: Conversation not found. Wrong hashtable? */
896 | return;
897 | }
898 |
899 | prev->next = conv->next;
900 |
901 | if (NULL((void*)0) == conv->next) {
902 | /* We're at the very end of the list. */
903 | chain_head->last = prev;
904 | }
905 |
906 | if (chain_head->latest_found == conv)
907 | chain_head->latest_found = prev;
908 | }
909 | }
910 |
911 | conversation_t *conversation_new_full(const uint32_t setup_frame, conversation_element_t *elements)
912 | {
913 | DISSECTOR_ASSERT(elements)((void) ((elements) ? (void)0 : (proto_report_dissector_bug("%s:%u: failed assertion \"%s\"" , "epan/conversation.c", 913, "elements"))));
914 |
915 | char *el_list_map_key = conversation_element_list_name(wmem_epan_scope(), elements);
916 | wmem_map_t *el_list_map = (wmem_map_t *) wmem_map_lookup(conversation_hashtable_element_list, el_list_map_key);
917 | if (!el_list_map) {
918 | el_list_map = wmem_map_new_autoreset(wmem_epan_scope(), wmem_file_scope(), conversation_hash_element_list,
919 | conversation_match_element_list);
920 | wmem_map_insert(conversation_hashtable_element_list, wmem_strdup(wmem_epan_scope(), el_list_map_key), el_list_map);
921 | }
922 |
923 | size_t element_count = conversation_element_count(elements);
924 | conversation_element_t *conv_key = wmem_memdup(wmem_file_scope(), elements, sizeof(conversation_element_t) * element_count);
925 | for (size_t i = 0; i < element_count; i++) {
926 | if (conv_key[i].type == CE_ADDRESS) {
927 | copy_address_wmem(wmem_file_scope(), &conv_key[i].addr_val, &elements[i].addr_val);
928 | } else if (conv_key[i].type == CE_STRING) {
929 | conv_key[i].str_val = wmem_strdup(wmem_file_scope(), elements[i].str_val);
930 | } else if (conv_key[i].type == CE_BLOB) {
931 | conv_key[i].blob.val = wmem_memdup(wmem_file_scope(), elements[i].blob.val, elements[i].blob.len);
932 | }
933 | }
934 |
935 | conversation_t *conversation = wmem_new0(wmem_file_scope(), conversation_t)((conversation_t*)wmem_alloc0((wmem_file_scope()), sizeof(conversation_t )));
936 | conversation->conv_index = new_index;
937 | conversation->setup_frame = conversation->last_frame = setup_frame;
938 |
939 | new_index++;
940 |
941 | conversation->key_ptr = conv_key;
942 | conversation_insert_into_hashtable(el_list_map, conversation);
943 | return conversation;
944 | }
945 |
946 | /*
947 | * Given two address/port pairs for a packet, create a new conversation
948 | * to contain packets between those address/port pairs.
949 | *
950 | * The options field is used to specify whether the address 2 value
951 | * and/or port 2 value are not given and any value is acceptable
952 | * when searching for this conversation.
953 | */
954 | conversation_t *
955 | conversation_new(const uint32_t setup_frame, const address *addr1, const address *addr2,
956 | const conversation_type ctype, const uint32_t port1, const uint32_t port2, const unsigned options)
957 | {
958 | /*
959 | DISSECTOR_ASSERT(!(options | CONVERSATION_TEMPLATE) || ((options | (NO_ADDR2 | NO_PORT2 | NO_PORT2_FORCE))) &&
960 | "A conversation template may not be constructed without wildcard options");
961 | */
962 | wmem_map_t* hashtable;
963 | conversation_t *conversation = NULL((void*)0);
964 | /*
965 | * Verify that the correct options are used, if any.
966 | */
967 | DISSECTOR_ASSERT_HINT(!(options & NO_MASK_B), "Use NO_ADDR2 and/or NO_PORT2 or NO_PORT2_FORCE as option")((void) ((!(options & 0xFFFF0000)) ? (void)0 : (proto_report_dissector_bug ("%s:%u: failed assertion \"%s\" (%s)", "epan/conversation.c" , 967, "!(options & 0xFFFF0000)", "Use NO_ADDR2 and/or NO_PORT2 or NO_PORT2_FORCE as option" ))));
968 |
969 | #ifdef DEBUG_CONVERSATION
970 | char *addr1_str, *addr2_str;
971 | if (addr1 == NULL((void*)0)) {
972 | /*
973 | * No address 1.
974 | */
975 | if (options & NO_ADDR20x01) {
976 | /*
977 | * Neither address 1 nor address 2.
978 | */
979 | if (options & NO_PORT20x02) {
980 | /*
981 | * Port 1 but not port 2.
982 | */
983 | DPRINT(("creating conversation for frame #%u: ID %u (ctype=%d)",(void)0
984 | setup_frame, port1, ctype))(void)0;
985 | } else {
986 | /*
987 | * Ports 1 and 2.
988 | */
989 | DPRINT(("creating conversation for frame #%u: %u -> %u (ctype=%d)",(void)0
990 | setup_frame, port1, port2, ctype))(void)0;
991 | }
992 | } else {
993 | /*
994 | * Address 2 but not address 1.
995 | */
996 | addr2_str = address_to_str(NULL((void*)0), addr2);
997 | if (options & NO_PORT20x02) {
998 | /*
999 | * Port 1 but not port 2.
1000 | */
1001 | DPRINT(("creating conversation for frame #%u: ID %u, address %s (ctype=%d)",(void)0
1002 | setup_frame, port1, addr2_str, ctype))(void)0;
1003 | } else {
1004 | /*
1005 | * Ports 1 and 2.
1006 | */
1007 | DPRINT(("creating conversation for frame #%u: %u -> %s:%u (ctype=%d)",(void)0
1008 | setup_frame, port1, addr2_str, port2, ctype))(void)0;
1009 | }
1010 | wmem_free(NULL((void*)0), addr2_str);
1011 | }
1012 | } else {
1013 | /*
1014 | * Address 1.
1015 | */
1016 | addr1_str = address_to_str(NULL((void*)0), addr1);
1017 | if (options & NO_ADDR20x01) {
1018 | /*
1019 | * Address 1 but no address 2.
1020 | */
1021 | if (options & NO_PORT20x02) {
1022 | /*
1023 | * Port 1 but not port 2.
1024 | */
1025 | DPRINT(("creating conversation for frame #%u: %s:%u (ctype=%d)",(void)0
1026 | setup_frame, addr1_str, port1, ctype))(void)0;
1027 | } else {
1028 | /*
1029 | * Ports 1 and 2.
1030 | */
1031 | DPRINT(("creating conversation for frame #%u: %s:%u -> %u (ctype=%d)",(void)0
1032 | setup_frame, addr1_str, port1, port2, ctype))(void)0;
1033 | }
1034 | } else {
1035 | /*
1036 | * Addresses 1 and 2.
1037 | */
1038 | addr2_str = address_to_str(NULL((void*)0), addr2);
1039 | if (options & NO_PORT20x02) {
1040 | /*
1041 | * Port 1 but not port 2.
1042 | */
1043 | DPRINT(("creating conversation for frame #%u: %s:%u -> %s (ctype=%d)",(void)0
1044 | setup_frame, addr1_str, port1, addr2_str, ctype))(void)0;
1045 | } else if (options & NO_PORTS0x010) {
1046 | /*
1047 | * No Ports.
1048 | */
1049 | DPRINT(("creating conversation for frame #%u: %s -> %s (ctype=%d)",(void)0
1050 | setup_frame, addr1_str, addr2_str, ctype))(void)0;
1051 | } else {
1052 | /*
1053 | * Ports 1 and 2.
1054 | */
1055 | DPRINT(("creating conversation for frame #%u: %s:%u -> %s:%u (ctype=%d)",(void)0
1056 | setup_frame, addr1_str, port1, addr2_str, port2, ctype))(void)0;
1057 | }
1058 | wmem_free(NULL((void*)0), addr2_str);
1059 | }
1060 | wmem_free(NULL((void*)0), addr1_str);
1061 | }
1062 | #endif
1063 |
1064 | // Always allocate an "exact"-sized key in case we call conversation_set_port2
1065 | // or conversation_set_addr2 later.
1066 | conversation_element_t *new_key = wmem_alloc(wmem_file_scope(), sizeof(conversation_element_t) * EXACT_IDX_COUNT);
1067 | size_t addr2_idx = 0;
1068 | size_t port2_idx = 0;
1069 | size_t endp_idx;
1070 |
1071 | new_key[ADDR1_IDX].type = CE_ADDRESS;
1072 | if (addr1 != NULL((void*)0)) {
1073 | copy_address_wmem(wmem_file_scope(), &new_key[ADDR1_IDX].addr_val, addr1);
1074 | } else {
1075 | clear_address(&new_key[ADDR1_IDX].addr_val);
1076 | }
1077 |
1078 | if (!(options & NO_PORTS0x010)) {
1079 | new_key[PORT1_IDX].type = CE_PORT;
1080 | new_key[PORT1_IDX].port_val = port1;
1081 | }
1082 |
1083 | if (options & NO_ADDR20x01) {
1084 | if (options & (NO_PORT20x02|NO_PORT2_FORCE0x04)) {
1085 | hashtable = conversation_hashtable_no_addr2_or_port2;
1086 | endp_idx = ENDP_NO_ADDR2_PORT2_IDX;
1087 | } else {
1088 | hashtable = conversation_hashtable_no_addr2;
1089 | port2_idx = PORT2_NO_ADDR2_IDX;
1090 | endp_idx = ENDP_NO_ADDR2_IDX;
1091 | }
1092 | } else {
1093 | if (options & (NO_PORT20x02|NO_PORT2_FORCE0x04)) {
1094 | hashtable = conversation_hashtable_no_port2;
1095 | addr2_idx = ADDR2_IDX;
1096 | endp_idx = ENDP_NO_PORT2_IDX;
1097 | } else if (options & NO_PORTS0x010) {
1098 | hashtable = conversation_hashtable_exact_addr;
1099 | addr2_idx = PORT1_IDX;
1100 | endp_idx = ENDP_NO_PORTS_IDX;
1101 | } else {
1102 | hashtable = conversation_hashtable_exact_addr_port;
1103 | addr2_idx = ADDR2_IDX;
1104 | port2_idx = PORT2_IDX;
1105 | endp_idx = ENDP_EXACT_IDX;
1106 | }
1107 | }
1108 |
1109 | if (addr2_idx) {
1110 | new_key[addr2_idx].type = CE_ADDRESS;
1111 | if (addr2 != NULL((void*)0)) {
1112 | copy_address_wmem(wmem_file_scope(), &new_key[addr2_idx].addr_val, addr2);
1113 | } else {
1114 | clear_address(&new_key[addr2_idx].addr_val);
1115 | }
1116 | }
1117 |
1118 | if (port2_idx) {
1119 | new_key[port2_idx].type = CE_PORT;
1120 | new_key[port2_idx].port_val = port2;
1121 | }
1122 |
1123 | new_key[endp_idx].type = CE_CONVERSATION_TYPE;
1124 | new_key[endp_idx].conversation_type_val = ctype;
1125 |
1126 | conversation = wmem_new0(wmem_file_scope(), conversation_t)((conversation_t*)wmem_alloc0((wmem_file_scope()), sizeof(conversation_t )));
1127 |
1128 | conversation->conv_index = new_index;
1129 | conversation->setup_frame = conversation->last_frame = setup_frame;
1130 |
1131 | /* set the options and key pointer */
1132 | conversation->options = options;
1133 | conversation->key_ptr = new_key;
1134 |
1135 | new_index++;
1136 |
1137 | DINDENT()(void)0;
1138 | conversation_insert_into_hashtable(hashtable, conversation);
1139 | DENDENT()(void)0;
1140 |
1141 | return conversation;
1142 | }
1143 |
1144 | conversation_t *
1145 | conversation_new_strat(const packet_info *pinfo, const conversation_type ctype, const unsigned options)
1146 | {
1147 | conversation_t *conversation = NULL((void*)0);
1148 | bool_Bool is_ordinary_conv = true1;
1149 |
1150 | if(is_deinterlacing_supported(pinfo)) {
1151 | conversation_t *underlying_conv = find_conversation_deinterlacer_pinfo(pinfo);
1152 | if(underlying_conv) {
1153 | is_ordinary_conv = false0;
1154 | conversation = conversation_new_deinterlaced(pinfo->num, &pinfo->src, &pinfo->dst, ctype,
1155 | pinfo->srcport, pinfo->destport, underlying_conv->conv_index, options);
1156 | }
1157 | }
1158 |
1159 | if(is_ordinary_conv) {
1160 | conversation = conversation_new(pinfo->num, &pinfo->src, &pinfo->dst, ctype, pinfo->srcport, pinfo->destport, options);
1161 | }
1162 |
1163 | return conversation;
1164 | }
1165 |
1166 | conversation_t *
1167 | conversation_new_strat_xtd(const packet_info *pinfo, const uint32_t setup_frame, const address *addr1, const address *addr2,
1168 | const conversation_type ctype, const uint32_t port1, const uint32_t port2, const unsigned options)
1169 | {
1170 | conversation_t *conversation = NULL((void*)0);
1171 | bool_Bool is_ordinary_conv = true1;
1172 |
1173 | if(is_deinterlacing_supported(pinfo)) {
1174 | conversation_t *underlying_conv = find_conversation_deinterlacer_pinfo(pinfo);
1175 | if(underlying_conv) {
1176 | is_ordinary_conv = false0;
1177 | conversation = conversation_new_deinterlaced(setup_frame, addr1, addr2, ctype,
1178 | port1, port2, underlying_conv->conv_index, options);
1179 | }
1180 | }
1181 |
1182 | if(is_ordinary_conv) {
1183 | conversation = conversation_new(setup_frame, addr1, addr2, ctype, port1, port2, options);
1184 | }
1185 |
1186 | return conversation;
1187 | }
1188 |
1189 | conversation_t *
1190 | conversation_new_by_id(const uint32_t setup_frame, const conversation_type ctype, const uint32_t id)
1191 | {
1192 | conversation_t *conversation = wmem_new0(wmem_file_scope(), conversation_t)((conversation_t*)wmem_alloc0((wmem_file_scope()), sizeof(conversation_t )));
1193 | conversation->conv_index = new_index;
1194 | conversation->setup_frame = conversation->last_frame = setup_frame;
1195 |
1196 | new_index++;
1197 |
1198 | conversation_element_t *elements = wmem_alloc(wmem_file_scope(), sizeof(conversation_element_t) * 2);
1199 | elements[0].type = CE_UINT;
1200 | elements[0].uint_val = id;
1201 | elements[1].type = CE_CONVERSATION_TYPE;
1202 | elements[1].conversation_type_val = ctype;
1203 | conversation->key_ptr = elements;
1204 | conversation_insert_into_hashtable(conversation_hashtable_id, conversation);
1205 |
1206 | return conversation;
1207 | }
1208 |
1209 | conversation_t *
1210 | conversation_new_err_pkts(const uint32_t setup_frame, const conversation_type ctype, const uint32_t id, const uint32_t rid)
1211 | {
1212 | conversation_t *conversation = wmem_new0(wmem_file_scope(), conversation_t)((conversation_t*)wmem_alloc0((wmem_file_scope()), sizeof(conversation_t )));
1213 | conversation->conv_index = new_index;
1214 | conversation->setup_frame = conversation->last_frame = setup_frame;
1215 |
1216 | new_index++;
1217 |
1218 | conversation_element_t *elements = wmem_alloc(wmem_file_scope(), sizeof(conversation_element_t) * 3);
1219 | elements[0].type = CE_UINT;
1220 | elements[0].uint_val = id;
1221 | elements[1].type = CE_UINT;
1222 | elements[1].uint_val = rid;
1223 | elements[2].type = CE_CONVERSATION_TYPE;
1224 | elements[2].conversation_type_val = ctype;
1225 | conversation->key_ptr = elements;
1226 | conversation_insert_into_hashtable(conversation_hashtable_err_pkts, conversation);
1227 |
1228 | return conversation;
1229 | }
1230 |
1231 | conversation_t *
1232 | conversation_new_deinterlacer(const uint32_t setup_frame, const address *addr1, const address *addr2,
1233 | const conversation_type ctype, const uint32_t key1, const uint32_t key2, const uint32_t key3)
1234 | {
1235 |
1236 | conversation_t *conversation = wmem_new0(wmem_file_scope(), conversation_t)((conversation_t*)wmem_alloc0((wmem_file_scope()), sizeof(conversation_t )));
1237 | conversation->conv_index = new_index;
1238 | conversation->setup_frame = conversation->last_frame = setup_frame;
1239 |
1240 | conversation_element_t *new_key = wmem_alloc(wmem_file_scope(), sizeof(conversation_element_t) * (DEINTR_ENDP_IDX+1));
1241 |
1242 | new_key[DEINTR_ADDR1_IDX].type = CE_ADDRESS;
1243 | if (addr1 != NULL((void*)0)) {
1244 | copy_address_wmem(wmem_file_scope(), &new_key[DEINTR_ADDR1_IDX].addr_val, addr1);
1245 | }
1246 | else {
1247 | clear_address(&new_key[DEINTR_ADDR1_IDX].addr_val);
1248 | }
1249 |
1250 | new_key[DEINTR_ADDR2_IDX].type = CE_ADDRESS;
1251 | if (addr2 != NULL((void*)0)) {
1252 | copy_address_wmem(wmem_file_scope(), &new_key[DEINTR_ADDR2_IDX].addr_val, addr2);
1253 | }
1254 | else {
1255 | clear_address(&new_key[DEINTR_ADDR2_IDX].addr_val);
1256 | }
1257 |
1258 | new_key[DEINTR_KEY1_IDX].type = CE_UINT;
1259 | new_key[DEINTR_KEY1_IDX].uint_val = key1;
1260 |
1261 | new_key[DEINTR_KEY2_IDX].type = CE_UINT;
1262 | new_key[DEINTR_KEY2_IDX].uint_val = key2;
1263 |
1264 | new_key[DEINTR_KEY3_IDX].type = CE_UINT;
1265 | new_key[DEINTR_KEY3_IDX].uint_val = key3;
1266 |
1267 | new_key[DEINTR_ENDP_IDX].type = CE_CONVERSATION_TYPE;
1268 | new_key[DEINTR_ENDP_IDX].conversation_type_val = ctype;
1269 |
1270 | conversation->key_ptr = new_key;
1271 |
1272 | new_index++;
1273 |
1274 | conversation_insert_into_hashtable(conversation_hashtable_deinterlacer, conversation);
1275 |
1276 | return conversation;
1277 | }
1278 |
1279 | conversation_t *
1280 | conversation_new_deinterlaced(const uint32_t setup_frame, const address *addr1, const address *addr2,
1281 | const conversation_type ctype, const uint32_t port1, const uint32_t port2, const uint32_t anchor, const unsigned options)
1282 | {
1283 |
1284 | conversation_t *conversation = wmem_new0(wmem_file_scope(), conversation_t)((conversation_t*)wmem_alloc0((wmem_file_scope()), sizeof(conversation_t )));
1285 | conversation->conv_index = new_index;
1286 | conversation->setup_frame = conversation->last_frame = setup_frame;
1287 |
1288 | if (options & NO_PORTS0x010) {
1289 | conversation_element_t *new_key = wmem_alloc(wmem_file_scope(), sizeof(conversation_element_t) * (DEINTD_ENDP_NO_PORTS_IDX+2));
1290 |
1291 | new_key[DEINTD_ADDR1_IDX].type = CE_ADDRESS;
1292 | if (addr1 != NULL((void*)0)) {
1293 | copy_address_wmem(wmem_file_scope(), &new_key[DEINTD_ADDR1_IDX].addr_val, addr1);
1294 | }
1295 | else {
1296 | clear_address(&new_key[DEINTD_ADDR1_IDX].addr_val);
1297 | }
1298 |
1299 | new_key[DEINTD_ADDR2_IDX].type = CE_ADDRESS;
1300 | if (addr2 != NULL((void*)0)) {
1301 | copy_address_wmem(wmem_file_scope(), &new_key[DEINTD_ADDR2_IDX].addr_val, addr2);
1302 | }
1303 | else {
1304 | clear_address(&new_key[DEINTD_ADDR2_IDX].addr_val);
1305 | }
1306 |
1307 | new_key[DEINTD_ENDP_NO_PORTS_IDX].type = CE_UINT;
1308 | new_key[DEINTD_ENDP_NO_PORTS_IDX].uint_val = anchor;
1309 |
1310 | new_key[DEINTD_ENDP_NO_PORTS_IDX+ 1].type = CE_CONVERSATION_TYPE;
1311 | new_key[DEINTD_ENDP_NO_PORTS_IDX+ 1].conversation_type_val = ctype;
1312 |
1313 | // set the options and key pointer
1314 | conversation->options = options;
1315 | conversation->key_ptr = new_key;
1316 |
1317 | new_index++;
1318 |
1319 | conversation_insert_into_hashtable(conversation_hashtable_exact_addr_anc, conversation);
1320 |
1321 | return conversation;
1322 | }
1323 | else if (options & NO_ADDR20x01) {
1324 | if (options & NO_PORT20x02) {
1325 |
1326 | conversation_element_t *new_key = wmem_alloc(wmem_file_scope(), sizeof(conversation_element_t) * (DEINTD_NO_ADDR2_PORT2_IDX_COUNT+1));
1327 |
1328 | new_key[DEINTD_ADDR1_IDX].type = CE_ADDRESS;
1329 | if (addr1 != NULL((void*)0)) {
1330 | copy_address_wmem(wmem_file_scope(), &new_key[DEINTD_ADDR1_IDX].addr_val, addr1);
1331 | }
1332 | else {
1333 | clear_address(&new_key[DEINTD_ADDR1_IDX].addr_val);
1334 | }
1335 |
1336 | new_key[DEINTD_PORT1_IDX-1].type = CE_PORT;
1337 | new_key[DEINTD_PORT1_IDX-1].port_val = port1;
1338 |
1339 | new_key[DEINTD_NO_ADDR2_PORT2_IDX_COUNT-2].type = CE_UINT;
1340 | new_key[DEINTD_NO_ADDR2_PORT2_IDX_COUNT-2].uint_val = anchor;
1341 |
1342 | new_key[DEINTD_NO_ADDR2_PORT2_IDX_COUNT-1].type = CE_CONVERSATION_TYPE;
1343 | new_key[DEINTD_NO_ADDR2_PORT2_IDX_COUNT-1].conversation_type_val = ctype;
1344 |
1345 | // set the options and key pointer
1346 | conversation->options = options;
1347 | conversation->key_ptr = new_key;
1348 |
1349 | new_index++;
1350 |
1351 | conversation_insert_into_hashtable(conversation_hashtable_no_addr2_or_port2_anc, conversation);
1352 |
1353 | return conversation;
1354 | }
1355 |
1356 | else {
1357 | conversation_element_t *new_key = wmem_alloc(wmem_file_scope(), sizeof(conversation_element_t) * (DEINTD_NO_ADDR2_IDX_COUNT+1));
1358 |
1359 | new_key[DEINTD_ADDR1_IDX].type = CE_ADDRESS;
1360 | if (addr1 != NULL((void*)0)) {
1361 | copy_address_wmem(wmem_file_scope(), &new_key[DEINTD_ADDR1_IDX].addr_val, addr1);
1362 | }
1363 | else {
1364 | clear_address(&new_key[DEINTD_ADDR1_IDX].addr_val);
1365 | }
1366 |
1367 | new_key[DEINTD_PORT1_IDX-1].type = CE_PORT;
1368 | new_key[DEINTD_PORT1_IDX-1].port_val = port1;
1369 |
1370 | new_key[DEINTD_PORT2_IDX-1].type = CE_PORT;
1371 | new_key[DEINTD_PORT2_IDX-1].port_val = port2;
1372 |
1373 | new_key[DEINTD_NO_ADDR2_IDX_COUNT-2].type = CE_UINT;
1374 | new_key[DEINTD_NO_ADDR2_IDX_COUNT-2].uint_val = anchor;
1375 |
1376 | new_key[DEINTD_NO_ADDR2_IDX_COUNT-1].type = CE_CONVERSATION_TYPE;
1377 | new_key[DEINTD_NO_ADDR2_IDX_COUNT-1].conversation_type_val = ctype;
1378 |
1379 | // set the options and key pointer
1380 | conversation->options = options;
1381 | conversation->key_ptr = new_key;
1382 |
1383 | new_index++;
1384 |
1385 | conversation_insert_into_hashtable(conversation_hashtable_no_addr2_anc, conversation);
1386 |
1387 | return conversation;
1388 | }
1389 | }
1390 | else if (options & NO_PORT20x02) {
1391 | conversation_element_t *new_key = wmem_alloc(wmem_file_scope(), sizeof(conversation_element_t) * (DEINTD_EXACT_IDX_COUNT+1));
1392 |
1393 | new_key[DEINTD_ADDR1_IDX].type = CE_ADDRESS;
1394 | if (addr1 != NULL((void*)0)) {
1395 | copy_address_wmem(wmem_file_scope(), &new_key[DEINTD_ADDR1_IDX].addr_val, addr1);
1396 | }
1397 | else {
1398 | clear_address(&new_key[DEINTD_ADDR1_IDX].addr_val);
1399 | }
1400 |
1401 | new_key[DEINTD_ADDR2_IDX].type = CE_ADDRESS;
1402 | if (addr2 != NULL((void*)0)) {
1403 | copy_address_wmem(wmem_file_scope(), &new_key[DEINTD_ADDR2_IDX].addr_val, addr2);
1404 | }
1405 | else {
1406 | clear_address(&new_key[DEINTD_ADDR2_IDX].addr_val);
1407 | }
1408 |
1409 | new_key[DEINTD_PORT1_IDX].type = CE_PORT;
1410 | new_key[DEINTD_PORT1_IDX].port_val = port1;
1411 |
1412 | new_key[DEINTD_PORT1_IDX + 1].type = CE_UINT;
1413 | new_key[DEINTD_PORT1_IDX + 1].uint_val = anchor;
1414 |
1415 | new_key[DEINTD_PORT1_IDX + 2].type = CE_CONVERSATION_TYPE;
1416 | new_key[DEINTD_PORT1_IDX + 2].conversation_type_val = ctype;
1417 |
1418 | // set the options and key pointer
1419 | conversation->options = options;
1420 | conversation->key_ptr = new_key;
1421 |
1422 | new_index++;
1423 |
1424 | conversation_insert_into_hashtable(conversation_hashtable_exact_addr_port_anc, conversation);
1425 |
1426 | return conversation;
1427 | }
1428 | else {
1429 | conversation_element_t *new_key = wmem_alloc(wmem_file_scope(), sizeof(conversation_element_t) * (DEINTD_EXACT_IDX_COUNT+2));
1430 |
1431 | new_key[DEINTD_ADDR1_IDX].type = CE_ADDRESS;
1432 | if (addr1 != NULL((void*)0)) {
1433 | copy_address_wmem(wmem_file_scope(), &new_key[DEINTD_ADDR1_IDX].addr_val, addr1);
1434 | }
1435 | else {
1436 | clear_address(&new_key[DEINTD_ADDR1_IDX].addr_val);
1437 | }
1438 |
1439 | new_key[DEINTD_ADDR2_IDX].type = CE_ADDRESS;
1440 | if (addr2 != NULL((void*)0)) {
1441 | copy_address_wmem(wmem_file_scope(), &new_key[DEINTD_ADDR2_IDX].addr_val, addr2);
1442 | }
1443 | else {
1444 | clear_address(&new_key[DEINTD_ADDR2_IDX].addr_val);
1445 | }
1446 |
1447 | new_key[DEINTD_PORT1_IDX].type = CE_PORT;
1448 | new_key[DEINTD_PORT1_IDX].port_val = port1;
1449 |
1450 | new_key[DEINTD_PORT2_IDX].type = CE_PORT;
1451 | new_key[DEINTD_PORT2_IDX].port_val = port2;
1452 |
1453 | new_key[DEINTD_ENDP_EXACT_IDX].type = CE_UINT;
1454 | new_key[DEINTD_ENDP_EXACT_IDX].uint_val = anchor;
1455 |
1456 | new_key[DEINTD_ENDP_EXACT_IDX + 1].type = CE_CONVERSATION_TYPE;
1457 | new_key[DEINTD_ENDP_EXACT_IDX + 1].conversation_type_val = ctype;
1458 |
1459 | // set the options and key pointer
1460 | conversation->options = options;
1461 | conversation->key_ptr = new_key;
1462 |
1463 | new_index++;
1464 |
1465 | conversation_insert_into_hashtable(conversation_hashtable_exact_addr_port_anc, conversation);
1466 |
1467 | return conversation;
1468 | }
1469 | }
1470 |
1471 | /*
1472 | * Set the port 2 value in a key. Remove the original from table,
1473 | * update the options and port values, insert the updated key.
1474 | */
1475 | void
1476 | conversation_set_port2(conversation_t *conv, const uint32_t port)
1477 | {
1478 | DISSECTOR_ASSERT_HINT(!(conv->options & CONVERSATION_TEMPLATE),((void) ((!(conv->options & 0x08)) ? (void)0 : (proto_report_dissector_bug ("%s:%u: failed assertion \"%s\" (%s)", "epan/conversation.c" , 1479, "!(conv->options & 0x08)", "Use the conversation_create_from_template function when the CONVERSATION_TEMPLATE bit is set in the options mask" ))))
1479 | "Use the conversation_create_from_template function when the CONVERSATION_TEMPLATE bit is set in the options mask")((void) ((!(conv->options & 0x08)) ? (void)0 : (proto_report_dissector_bug ("%s:%u: failed assertion \"%s\" (%s)", "epan/conversation.c" , 1479, "!(conv->options & 0x08)", "Use the conversation_create_from_template function when the CONVERSATION_TEMPLATE bit is set in the options mask" ))));
1480 |
1481 | DPRINT(("called for port=%d", port))(void)0;
1482 |
1483 | /*
1484 | * If the port 2 value is not wildcarded, don't set it.
1485 | */
1486 | if ((!(conv->options & NO_PORT20x02)) || (conv->options & NO_PORT2_FORCE0x04))
1487 | return;
1488 |
1489 | DINDENT()(void)0;
1490 | if (conv->options & NO_ADDR20x01) {
1491 | conversation_remove_from_hashtable(conversation_hashtable_no_addr2_or_port2, conv);
1492 | } else {
1493 | conversation_remove_from_hashtable(conversation_hashtable_no_port2, conv);
1494 | }
1495 |
1496 | // Shift our endpoint element over and set our port. We assume that conv->key_ptr
1497 | // was created with conversation_new and that we have enough element slots.
1498 | conv->options &= ~NO_PORT20x02;
1499 | if (conv->options & NO_ADDR20x01) {
1500 | // addr1,port1,endp -> addr1,port1,port2,endp
1501 | conv->key_ptr[ENDP_NO_ADDR2_IDX] = conv->key_ptr[ENDP_NO_ADDR2_PORT2_IDX];
1502 | conv->key_ptr[PORT2_NO_ADDR2_IDX].type = CE_PORT;
1503 | conv->key_ptr[PORT2_NO_ADDR2_IDX].port_val = port;
1504 | conversation_insert_into_hashtable(conversation_hashtable_no_addr2, conv);
1505 | } else {
1506 | // addr1,port1,addr2,endp -> addr1,port1,addr2,port2,endp
1507 | conv->key_ptr[ENDP_EXACT_IDX] = conv->key_ptr[ENDP_NO_PORT2_IDX];
1508 | conv->key_ptr[PORT2_IDX].type = CE_PORT;
1509 | conv->key_ptr[PORT2_IDX].port_val = port;
1510 | conversation_insert_into_hashtable(conversation_hashtable_exact_addr_port, conv);
1511 | }
1512 | DENDENT()(void)0;
1513 | }
1514 |
1515 | /*
1516 | * Set the address 2 value in a key. Remove the original from
1517 | * table, update the options and port values, insert the updated key.
1518 | */
1519 | void
1520 | conversation_set_addr2(conversation_t *conv, const address *addr)
1521 | {
1522 | char* addr_str;
1523 | DISSECTOR_ASSERT_HINT(!(conv->options & CONVERSATION_TEMPLATE),((void) ((!(conv->options & 0x08)) ? (void)0 : (proto_report_dissector_bug ("%s:%u: failed assertion \"%s\" (%s)", "epan/conversation.c" , 1524, "!(conv->options & 0x08)", "Use the conversation_create_from_template function when the CONVERSATION_TEMPLATE bit is set in the options mask" ))))
1524 | "Use the conversation_create_from_template function when the CONVERSATION_TEMPLATE bit is set in the options mask")((void) ((!(conv->options & 0x08)) ? (void)0 : (proto_report_dissector_bug ("%s:%u: failed assertion \"%s\" (%s)", "epan/conversation.c" , 1524, "!(conv->options & 0x08)", "Use the conversation_create_from_template function when the CONVERSATION_TEMPLATE bit is set in the options mask" ))));
1525 |
1526 | addr_str = address_to_str(NULL((void*)0), addr);
1527 | DPRINT(("called for addr=%s", addr_str))(void)0;
1528 | wmem_free(NULL((void*)0), addr_str);
1529 |
1530 | /*
1531 | * If the address 2 value is not wildcarded, don't set it.
1532 | */
1533 | if (!(conv->options & NO_ADDR20x01))
1534 | return;
1535 |
1536 | DINDENT()(void)0;
1537 | if (conv->options & NO_PORT20x02) {
1538 | conversation_remove_from_hashtable(conversation_hashtable_no_addr2_or_port2, conv);
1539 | } else {
1540 | conversation_remove_from_hashtable(conversation_hashtable_no_addr2, conv);
1541 | }
1542 |
1543 | // Shift our endpoint and, if needed, our port element over and set our address.
1544 | // We assume that conv->key_ptr was created with conversation_new and that we have
1545 | // enough element slots.
1546 | conv->options &= ~NO_ADDR20x01;
1547 | wmem_map_t *hashtable;
1548 | if (conv->options & NO_PORT20x02) {
1549 | // addr1,port1,endp -> addr1,port1,addr2,endp
1550 | conv->key_ptr[ENDP_NO_PORT2_IDX] = conv->key_ptr[ENDP_NO_ADDR2_PORT2_IDX];
1551 | hashtable = conversation_hashtable_no_port2;
1552 | } else {
1553 | // addr1,port1,port2,endp -> addr1,port1,addr2,port2,endp
1554 | conv->key_ptr[ENDP_EXACT_IDX] = conv->key_ptr[ENDP_NO_ADDR2_IDX];
1555 | conv->key_ptr[PORT2_IDX] = conv->key_ptr[PORT2_NO_ADDR2_IDX];
1556 | hashtable = conversation_hashtable_exact_addr_port;
1557 | }
1558 | conv->key_ptr[ADDR2_IDX].type = CE_ADDRESS;
1559 | copy_address_wmem(wmem_file_scope(), &conv->key_ptr[ADDR2_IDX].addr_val, addr);
1560 | conversation_insert_into_hashtable(hashtable, conv);
1561 | DENDENT()(void)0;
1562 | }
1563 |
1564 | static conversation_t *conversation_lookup_hashtable(wmem_map_t *conversation_hashtable, const uint32_t frame_num, conversation_element_t *conv_key)
1565 | {
1566 | conversation_t* convo = NULL((void*)0);
1567 | conversation_t* match = NULL((void*)0);
1568 | conversation_t* chain_head = NULL((void*)0);
1569 | chain_head = (conversation_t *)wmem_map_lookup(conversation_hashtable, conv_key);
1570 |
1571 | if (chain_head && (chain_head->setup_frame <= frame_num)) {
1572 | match = chain_head;
1573 |
1574 | if (chain_head->last && (chain_head->last->setup_frame <= frame_num))
1575 | return chain_head->last;
1576 |
1577 | if (chain_head->latest_found && (chain_head->latest_found->setup_frame <= frame_num))
1578 | match = chain_head->latest_found;
1579 |
1580 | for (convo = match; convo && convo->setup_frame <= frame_num; convo = convo->next) {
1581 | if (convo->setup_frame > match->setup_frame) {
1582 | match = convo;
1583 | }
1584 | }
1585 | }
1586 |
1587 | if (match) {
1588 | chain_head->latest_found = match;
1589 | }
1590 |
1591 | return match;
1592 | }
1593 |
1594 | conversation_t *find_conversation_full(const uint32_t frame_num, conversation_element_t *elements)
1595 | {
1596 | char *el_list_map_key = conversation_element_list_name(NULL((void*)0), elements);
1597 | wmem_map_t *el_list_map = (wmem_map_t *) wmem_map_lookup(conversation_hashtable_element_list, el_list_map_key);
1598 | g_free(el_list_map_key)(__builtin_object_size ((el_list_map_key), 0) != ((size_t) - 1 )) ? g_free_sized (el_list_map_key, __builtin_object_size ((el_list_map_key ), 0)) : (g_free) (el_list_map_key);
1599 | if (!el_list_map) {
1600 | return NULL((void*)0);
1601 | }
1602 |
1603 | return conversation_lookup_hashtable(el_list_map, frame_num, elements);
1604 | }
1605 |
1606 | /*
1607 | * Search a particular hash table for a conversation with the specified
1608 | * {addr1, port1, addr2, port2} and set up before frame_num.
1609 | */
1610 | static conversation_t *
1611 | conversation_lookup_exact(const uint32_t frame_num, const address *addr1, const uint32_t port1,
1612 | const address *addr2, const uint32_t port2, const conversation_type ctype)
1613 | {
1614 | conversation_element_t key[EXACT_IDX_COUNT] = {
1615 | { CE_ADDRESS, .addr_val = *addr1 },
1616 | { CE_PORT, .port_val = port1 },
1617 | { CE_ADDRESS, .addr_val = *addr2 },
1618 | { CE_PORT, .port_val = port2 },
1619 | { CE_CONVERSATION_TYPE, .conversation_type_val = ctype },
1620 | };
1621 | return conversation_lookup_hashtable(conversation_hashtable_exact_addr_port, frame_num, key);
1622 | }
1623 |
1624 | /*
1625 | * Search a particular hash table for a conversation with the specified
1626 | * {addr1, port1, port2} and set up before frame_num.
1627 | */
1628 | static conversation_t *
1629 | conversation_lookup_no_addr2(const uint32_t frame_num, const address *addr1, const uint32_t port1,
1630 | const uint32_t port2, const conversation_type ctype)
1631 | {
1632 | conversation_element_t key[NO_ADDR2_IDX_COUNT] = {
1633 | { CE_ADDRESS, .addr_val = *addr1 },
1634 | { CE_PORT, .port_val = port1 },
1635 | { CE_PORT, .port_val = port2 },
1636 | { CE_CONVERSATION_TYPE, .conversation_type_val = ctype },
1637 | };
1638 | return conversation_lookup_hashtable(conversation_hashtable_no_addr2, frame_num, key);
1639 | }
1640 |
1641 | /*
1642 | * Search a particular hash table for a conversation with the specified
1643 | * {addr1, port1, addr2} and set up before frame_num.
1644 | */
1645 | static conversation_t *
1646 | conversation_lookup_no_port2(const uint32_t frame_num, const address *addr1, const uint32_t port1,
1647 | const address *addr2, const conversation_type ctype)
1648 | {
1649 | conversation_element_t key[NO_PORT2_IDX_COUNT] = {
1650 | { CE_ADDRESS, .addr_val = *addr1 },
1651 | { CE_PORT, .port_val = port1 },
1652 | { CE_ADDRESS, .addr_val = *addr2 },
1653 | { CE_CONVERSATION_TYPE, .conversation_type_val = ctype },
1654 | };
1655 | return conversation_lookup_hashtable(conversation_hashtable_no_port2, frame_num, key);
1656 | }
1657 |
1658 | /*
1659 | * Search a particular hash table for a conversation with the specified
1660 | * {addr1, port1, addr2} and set up before frame_num.
1661 | */
1662 | static conversation_t *
1663 | conversation_lookup_no_addr2_or_port2(const uint32_t frame_num, const address *addr1, const uint32_t port1,
1664 | const conversation_type ctype)
1665 | {
1666 | conversation_element_t key[NO_ADDR2_PORT2_IDX_COUNT] = {
1667 | { CE_ADDRESS, .addr_val = *addr1 },
1668 | { CE_PORT, .port_val = port1 },
1669 | { CE_CONVERSATION_TYPE, .conversation_type_val = ctype },
1670 | };
1671 | return conversation_lookup_hashtable(conversation_hashtable_no_addr2_or_port2, frame_num, key);
1672 | }
1673 |
1674 | /*
1675 | * Search a particular hash table for a conversation with the specified
1676 | * {addr1, addr2} and set up before frame_num.
1677 | */
1678 | static conversation_t *
1679 | conversation_lookup_no_ports(const uint32_t frame_num, const address *addr1,
1680 | const address *addr2, const conversation_type ctype)
1681 | {
1682 | conversation_element_t key[ADDRS_IDX_COUNT] = {
1683 | { CE_ADDRESS, .addr_val = *addr1 },
1684 | { CE_ADDRESS, .addr_val = *addr2 },
1685 | { CE_CONVERSATION_TYPE, .conversation_type_val = ctype },
1686 | };
1687 | return conversation_lookup_hashtable(conversation_hashtable_exact_addr, frame_num, key);
1688 | }
1689 |
1690 | /*
1691 | * Search a particular hash table for a conversation with the specified
1692 | * {addr1, port1, addr2, port2, anchor} and set up before frame_num.
1693 | */
1694 | static conversation_t *
1695 | conversation_lookup_exact_anc(const uint32_t frame_num, const address *addr1, const uint32_t port1,
1696 | const address *addr2, const uint32_t port2, const conversation_type ctype,
1697 | const uint32_t anchor)
1698 | {
1699 | conversation_element_t key[DEINTD_EXACT_IDX_COUNT+1] = {
1700 | { CE_ADDRESS, .addr_val = *addr1 },
1701 | { CE_ADDRESS, .addr_val = *addr2 },
1702 | { CE_PORT, .port_val = port1 },
1703 | { CE_PORT, .port_val = port2 },
1704 | { CE_UINT, .uint_val = anchor },
1705 | { CE_CONVERSATION_TYPE, .conversation_type_val = ctype },
1706 | };
1707 | return conversation_lookup_hashtable(conversation_hashtable_exact_addr_port_anc, frame_num, key);
1708 | }
1709 |
1710 | /*
1711 | * Search a particular hash table for a conversation with the specified
1712 | * {addr1, addr2, anchor} and set up before frame_num.
1713 | */
1714 | static conversation_t *
1715 | conversation_lookup_no_ports_anc(const uint32_t frame_num, const address *addr1,
1716 | const address *addr2, const conversation_type ctype, const uint32_t anchor)
1717 | {
1718 | conversation_element_t key[DEINTD_ADDRS_IDX_COUNT+1] = {
1719 | { CE_ADDRESS, .addr_val = *addr1 },
1720 | { CE_ADDRESS, .addr_val = *addr2 },
1721 | { CE_UINT, .uint_val = anchor },
1722 | { CE_CONVERSATION_TYPE, .conversation_type_val = ctype },
1723 | };
1724 | return conversation_lookup_hashtable(conversation_hashtable_exact_addr_anc, frame_num, key);
1725 | }
1726 |
1727 | /*
1728 | * Search a particular hash table for a conversation with the specified
1729 | * {addr1, port1, port2, anchor} and set up before frame_num.
1730 | */
1731 | static conversation_t *
1732 | conversation_lookup_no_addr2_anc(const uint32_t frame_num, const address *addr1, const uint32_t port1,
1733 | const uint32_t port2, const conversation_type ctype,
1734 | const uint32_t anchor)
1735 | {
1736 | conversation_element_t key[DEINTD_NO_ADDR2_IDX_COUNT] = {
1737 | { CE_ADDRESS, .addr_val = *addr1 },
1738 | { CE_PORT, .port_val = port1 },
1739 | { CE_PORT, .port_val = port2 },
1740 | { CE_UINT, .uint_val = anchor },
1741 | { CE_CONVERSATION_TYPE, .conversation_type_val = ctype },
1742 | };
1743 | return conversation_lookup_hashtable(conversation_hashtable_no_addr2_anc , frame_num, key);
1744 | }
1745 |
1746 | /*
1747 | * Search a particular hash table for a conversation with the specified
1748 | * {addr1, port1, addr2, anchor} and set up before frame_num.
1749 | */
1750 | static conversation_t *
1751 | conversation_lookup_no_port2_anc(const uint32_t frame_num, const address *addr1, const uint32_t port1,
1752 | const address *addr2, const conversation_type ctype,
1753 | const uint32_t anchor)
1754 | {
1755 | conversation_element_t key[DEINTD_NO_PORT2_IDX_COUNT] = {
1756 | { CE_ADDRESS, .addr_val = *addr1 },
1757 | { CE_ADDRESS, .addr_val = *addr2 },
1758 | { CE_PORT, .port_val = port1 },
1759 | { CE_UINT, .uint_val = anchor },
1760 | { CE_CONVERSATION_TYPE, .conversation_type_val = ctype },
1761 | };
1762 | return conversation_lookup_hashtable(conversation_hashtable_exact_addr_port_anc, frame_num, key);
1763 | }
1764 |
1765 | /*
1766 | * Search a particular hash table for a conversation with the specified
1767 | * {addr1, port1, addr2} and set up before frame_num.
1768 | */
1769 | static conversation_t *
1770 | conversation_lookup_no_addr2_or_port2_anc(const uint32_t frame_num, const address *addr1, const uint32_t port1,
1771 | const conversation_type ctype, const uint32_t anchor)
1772 | {
1773 | conversation_element_t key[DEINTD_NO_ADDR2_PORT2_IDX_COUNT] = {
1774 | { CE_ADDRESS, .addr_val = *addr1 },
1775 | { CE_PORT, .port_val = port1 },
1776 | { CE_UINT, .uint_val = anchor },
1777 | { CE_CONVERSATION_TYPE, .conversation_type_val = ctype },
1778 | };
1779 | return conversation_lookup_hashtable(conversation_hashtable_no_addr2_or_port2_anc, frame_num, key);
1780 | }
1781 |
1782 | /*
1783 | * Search a particular hash table for a conversation with the specified
1784 | * {addr1, addr2, key1, key2, key3} and set up before frame_num.
1785 | * At this moment only the deinterlace table is likely to be called.
1786 | */
1787 | static conversation_t *
1788 | conversation_lookup_deinterlacer(const uint32_t frame_num, const address *addr1,
1789 | const address *addr2, const conversation_type ctype,
1790 | const uint32_t key1, const uint32_t key2, const uint32_t key3)
1791 | {
1792 | conversation_element_t key[DEINTR_ENDP_IDX+1] = {
1793 | { CE_ADDRESS, .addr_val = *addr1 },
1794 | { CE_ADDRESS, .addr_val = *addr2 },
1795 | { CE_UINT, .uint_val = key1 },
1796 | { CE_UINT, .uint_val = key2 },
1797 | { CE_UINT, .uint_val = key3 },
1798 | { CE_CONVERSATION_TYPE, .conversation_type_val = ctype },
1799 | };
1800 | return conversation_lookup_hashtable(conversation_hashtable_deinterlacer, frame_num, key);
1801 | }
1802 |
1803 | /*
1804 | * Given two address/port pairs for a packet, search for a conversation
1805 | * containing packets between those address/port pairs. Returns NULL if
1806 | * not found.
1807 | *
1808 | * We try to find the most exact match that we can, and then proceed to
1809 | * try wildcard matches on the "addr_b" and/or "port_b" argument if a more
1810 | * exact match failed.
1811 | *
1812 | * Either or both of the "addr_b" and "port_b" arguments may be specified as
1813 | * a wildcard by setting the NO_ADDR_B or NO_PORT_B flags in the "options"
1814 | * argument. We do only wildcard matches on addresses and ports specified
1815 | * as wildcards.
1816 | *
1817 | * I.e.:
1818 | *
1819 | * if neither "addr_b" nor "port_b" were specified as wildcards, we
1820 | * do an exact match (addr_a/port_a and addr_b/port_b) and, if that
1821 | * succeeds, we return a pointer to the matched conversation;
1822 | *
1823 | * otherwise, if "port_b" wasn't specified as a wildcard, we try to
1824 | * match any address 2 with the specified port 2 (addr_a/port_a and
1825 | * {any}/port_b) and, if that succeeds, we return a pointer to the
1826 | * matched conversation;
1827 | *
1828 | * otherwise, if "addr_b" wasn't specified as a wildcard, we try to
1829 | * match any port 2 with the specified address 2 (addr_a/port_a and
1830 | * addr_b/{any}) and, if that succeeds, we return a pointer to the
1831 | * matched conversation;
1832 | *
1833 | * otherwise, we try to match any address 2 and any port 2
1834 | * (addr_a/port_a and {any}/{any}) and, if that succeeds, we return
1835 | * a pointer to the matched conversation;
1836 | *
1837 | * otherwise, we found no matching conversation, and return NULL.
1838 | */
1839 | conversation_t *
1840 | find_conversation(const uint32_t frame_num, const address *addr_a, const address *addr_b, const conversation_type ctype,
1841 | const uint32_t port_a, const uint32_t port_b, const unsigned options)
1842 | {
1843 | conversation_t *conversation, *other_conv;
1844 |
1845 | if (!addr_a) {
1846 | addr_a = &null_address_;
1847 | }
1848 |
1849 | if (!addr_b) {
1850 | addr_b = &null_address_;
1851 | }
1852 |
1853 | DINSTR(char *addr_a_str = address_to_str(NULL, addr_a))(void)0;
1854 | DINSTR(char *addr_b_str = address_to_str(NULL, addr_b))(void)0;
1855 | /*
1856 | * Verify that the correct options are used, if any.
1857 | */
1858 | DISSECTOR_ASSERT_HINT((options == 0) || (options & NO_MASK_B), "Use NO_ADDR_B and/or NO_PORT_B as option")((void) (((options == 0) || (options & 0xFFFF0000)) ? (void )0 : (proto_report_dissector_bug("%s:%u: failed assertion \"%s\" (%s)" , "epan/conversation.c", 1858, "(options == 0) || (options & 0xFFFF0000)" , "Use NO_ADDR_B and/or NO_PORT_B as option"))));
1859 | /*
1860 | * First try an exact match, if we have two addresses and ports.
1861 | */
1862 | if (!(options & (NO_ADDR_B0x00010000|NO_PORT_B0x00020000|NO_PORT_X0x00040000|EXACT_EXCLUDED0x00200000))) {
1863 | /*
1864 | * Neither search address B nor search port B are wildcarded,
1865 | * start out with an exact match.
1866 | */
1867 | DPRINT(("trying exact match: %s:%d -> %s:%d",(void)0
1868 | addr_a_str, port_a, addr_b_str, port_b))(void)0;
1869 | conversation = conversation_lookup_exact(frame_num, addr_a, port_a, addr_b, port_b, ctype);
1870 | /*
1871 | * Look for an alternate conversation in the opposite direction, which
1872 | * might fit better. Note that using the helper functions such as
1873 | * find_conversation_pinfo and find_or_create_conversation will finally
1874 | * call this function and look for an orientation-agnostic conversation.
1875 | * If oriented conversations had to be implemented, amend this code or
1876 | * create new functions.
1877 | */
1878 |
1879 | DPRINT(("trying exact match: %s:%d -> %s:%d",(void)0
1880 | addr_b_str, port_b, addr_a_str, port_a))(void)0;
1881 | other_conv = conversation_lookup_exact(frame_num, addr_b, port_b, addr_a, port_a, ctype);
1882 | if (other_conv != NULL((void*)0)) {
1883 | if (conversation != NULL((void*)0)) {
1884 | if(other_conv->conv_index > conversation->conv_index) {
1885 | conversation = other_conv;
1886 | }
1887 | }
1888 | else {
1889 | conversation = other_conv;
1890 | }
1891 | }
1892 | if ((conversation == NULL((void*)0)) && (addr_a->type == AT_FC)) {
1893 | /* In Fibre channel, OXID & RXID are never swapped as
1894 | * TCP/UDP ports are in TCP/IP.
1895 | */
1896 | DPRINT(("trying exact match: %s:%d -> %s:%d",(void)0
1897 | addr_b_str, port_a, addr_a_str, port_b))(void)0;
1898 | conversation = conversation_lookup_exact(frame_num, addr_b, port_a, addr_a, port_b, ctype);
1899 | }
1900 | DPRINT(("exact match %sfound",conversation?"":"not "))(void)0;
1901 | if (conversation != NULL((void*)0))
1902 | goto end;
1903 | else if(options & NO_GREEDY0x00100000)
1904 | goto end;
1905 | }
1906 |
1907 | /*
1908 | * Well, that didn't find anything. Try matches that wildcard
1909 | * one of the addresses, if we have two ports.
1910 | */
1911 | if (!(options & (NO_PORT_B0x00020000|NO_PORT_X0x00040000))) {
1912 | /*
1913 | * Search port B isn't wildcarded.
1914 | *
1915 | * First try looking for a conversation with the specified
1916 | * address A and port A as the first address and port, and
1917 | * with any address and the specified port B as the second
1918 | * address and port.
1919 | * ("addr_b" doesn't take part in this lookup.)
1920 | */
1921 | DPRINT(("trying wildcarded match: %s:%d -> *:%d",(void)0
1922 | addr_a_str, port_a, port_b))(void)0;
1923 | conversation = conversation_lookup_no_addr2(frame_num, addr_a, port_a, port_b, ctype);
1924 | if ((conversation == NULL((void*)0)) && (addr_a->type == AT_FC)) {
1925 | /* In Fibre channel, OXID & RXID are never swapped as
1926 | * TCP/UDP ports are in TCP/IP.
1927 | */
1928 | DPRINT(("trying wildcarded match: %s:%d -> *:%d",(void)0
1929 | addr_b_str, port_a, port_b))(void)0;
1930 | conversation = conversation_lookup_no_addr2(frame_num, addr_b, port_a, port_b, ctype);
1931 | }
1932 | if (conversation != NULL((void*)0)) {
1933 | /*
1934 | * If search address B isn't wildcarded, and this is for a
1935 | * connection-oriented protocol, set the second address for this
1936 | * conversation to address B, as that's the address that matched the
1937 | * wildcarded second address for this conversation.
1938 | *
1939 | * (This assumes that, for all connection oriented protocols, the
1940 | * endpoints of a connection have only one address each, i.e. you
1941 | * don't get packets in a given direction coming from more than one
1942 | * address, unless the CONVERSATION_TEMPLATE option is set.)
1943 | */
1944 | DPRINT(("wildcarded dest address match found"))(void)0;
1945 | if (!(conversation->options & NO_ADDR20x01) && ctype != CONVERSATION_UDP)
1946 | {
1947 | if (!(conversation->options & CONVERSATION_TEMPLATE0x08))
1948 | {
1949 | conversation_set_addr2(conversation, addr_b);
1950 | }
1951 | else
1952 | {
1953 | conversation =
1954 | conversation_create_from_template(conversation, addr_b, 0);
1955 | }
1956 | }
1957 | goto end;
1958 | }
1959 |
1960 | /*
1961 | * Well, that didn't find anything.
1962 | * If search address B was specified, try looking for a
1963 | * conversation with the specified address B and port B as
1964 | * the first address and port, and with any address and the
1965 | * specified port A as the second address and port (this
1966 | * packet may be going in the opposite direction from the
1967 | * first packet in the conversation).
1968 | * ("addr_a" doesn't take part in this lookup.)
1969 | */
1970 | if (!(options & NO_ADDR_B0x00010000)) {
1971 | DPRINT(("trying wildcarded match: %s:%d -> *:%d",(void)0
1972 | addr_b_str, port_b, port_a))(void)0;
1973 | conversation = conversation_lookup_no_addr2(frame_num, addr_b, port_b, port_a, ctype);
1974 | if (conversation != NULL((void*)0)) {
1975 | /*
1976 | * If this is for a connection-oriented
1977 | * protocol, set the second address for
1978 | * this conversation to address A, as
1979 | * that's the address that matched the
1980 | * wildcarded second address for this
1981 | * conversation.
1982 | */
1983 | DPRINT(("match found"))(void)0;
1984 | if (ctype != CONVERSATION_UDP) {
1985 | if (!(conversation->options & CONVERSATION_TEMPLATE0x08))
1986 | {
1987 | conversation_set_addr2(conversation, addr_a);
1988 | }
1989 | else
1990 | {
1991 | conversation =
1992 | conversation_create_from_template(conversation, addr_a, 0);
1993 | }
1994 | }
1995 | goto end;
1996 | }
1997 | }
1998 | }
1999 |
2000 | /*
2001 | * Well, that didn't find anything. Try matches that wildcard
2002 | * one of the ports, if we have two addresses.
2003 | */
2004 | if (!(options & (NO_ADDR_B0x00010000|NO_PORT_X0x00040000))) {
2005 | /*
2006 | * Search address B isn't wildcarded.
2007 | *
2008 | * First try looking for a conversation with the specified
2009 | * address A and port A as the first address and port, and
2010 | * with the specified address B and any port as the second
2011 | * address and port.
2012 | * ("port_b" doesn't take part in this lookup.)
2013 | */
2014 | DPRINT(("trying wildcarded match: %s:%d -> %s:*",(void)0
2015 | addr_a_str, port_a, addr_b_str))(void)0;
2016 | conversation = conversation_lookup_no_port2(frame_num, addr_a, port_a, addr_b, ctype);
2017 | if ((conversation == NULL((void*)0)) && (addr_a->type == AT_FC)) {
2018 | /* In Fibre channel, OXID & RXID are never swapped as
2019 | * TCP/UDP ports are in TCP/IP
2020 | */
2021 | DPRINT(("trying wildcarded match: %s:%d -> %s:*", addr_b_str, port_a, addr_a_str))(void)0;
2022 | conversation = conversation_lookup_no_port2(frame_num, addr_b, port_a, addr_a, ctype);
2023 | }
2024 | if (conversation != NULL((void*)0)) {
2025 | /*
2026 | * If search port B isn't wildcarded, and this is for a connection-
2027 | * oriented protocol, set the second port for this conversation to
2028 | * port B, as that's the port that matched the wildcarded second port
2029 | * for this conversation.
2030 | *
2031 | * (This assumes that, for all connection oriented protocols, the
2032 | * endpoints of a connection have only one port each, i.e. you don't
2033 | * get packets in a given direction coming from more than one port,
2034 | * unless the CONVERSATION_TEMPLATE option is set.)
2035 | */
2036 | DPRINT(("match found"))(void)0;
2037 | if (!(conversation->options & NO_PORT20x02) && ctype != CONVERSATION_UDP)
2038 | {
2039 | if (!(conversation->options & CONVERSATION_TEMPLATE0x08))
2040 | {
2041 | conversation_set_port2(conversation, port_b);
2042 | }
2043 | else
2044 | {
2045 | conversation =
2046 | conversation_create_from_template(conversation, 0, port_b);
2047 | }
2048 | }
2049 | goto end;
2050 | }
2051 |
2052 | /*
2053 | * Well, that didn't find anything.
2054 | * If search port B was specified, try looking for a
2055 | * conversation with the specified address B and port B
2056 | * as the first address and port, and with the specified
2057 | * address A and any port as the second address and port
2058 | * (this packet may be going in the opposite direction
2059 | * from the first packet in the conversation).
2060 | * ("port_a" doesn't take part in this lookup.)
2061 | */
2062 | if (!(options & NO_PORT_B0x00020000)) {
2063 | DPRINT(("trying wildcarded match: %s:%d -> %s:*",(void)0
2064 | addr_b_str, port_b, addr_a_str))(void)0;
2065 | conversation = conversation_lookup_no_port2(frame_num, addr_b, port_b, addr_a, ctype);
2066 | if (conversation != NULL((void*)0)) {
2067 | /*
2068 | * If this is for a connection-oriented
2069 | * protocol, set the second port for
2070 | * this conversation to port A, as
2071 | * that's the address that matched the
2072 | * wildcarded second address for this
2073 | * conversation.
2074 | */
2075 | DPRINT(("match found"))(void)0;
2076 | if (ctype != CONVERSATION_UDP)
2077 | {
2078 | if (!(conversation->options & CONVERSATION_TEMPLATE0x08))
2079 | {
2080 | conversation_set_port2(conversation, port_a);
2081 | }
2082 | else
2083 | {
2084 | conversation =
2085 | conversation_create_from_template(conversation, 0, port_a);
2086 | }
2087 | }
2088 | goto end;
2089 | }
2090 | }
2091 | if(options & NO_GREEDY0x00100000) {
2092 | goto end;
2093 | }
2094 | }
2095 |
2096 | /*
2097 | * Well, that didn't find anything. Try matches that wildcard
2098 | * one address/port pair.
2099 | *
2100 | * First try looking for a conversation with the specified address A
2101 | * and port A as the first address and port.
2102 | * (Neither "addr_b" nor "port_b" take part in this lookup.)
2103 | */
2104 | if (!(options & NO_PORT_X0x00040000)) {
2105 | DPRINT(("trying wildcarded match: %s:%d -> *:*", addr_a_str, port_a))(void)0;
2106 | conversation = conversation_lookup_no_addr2_or_port2(frame_num, addr_a, port_a, ctype);
2107 | if (conversation != NULL((void*)0)) {
2108 | /*
2109 | * If this is for a connection-oriented protocol:
2110 | *
2111 | * if search address B isn't wildcarded, set the
2112 | * second address for this conversation to address
2113 | * B, as that's the address that matched the
2114 | * wildcarded second address for this conversation;
2115 | *
2116 | * if search port B isn't wildcarded, set the
2117 | * second port for this conversation to port B,
2118 | * as that's the port that matched the wildcarded
2119 | * second port for this conversation.
2120 | */
2121 | DPRINT(("match found"))(void)0;
2122 | if (ctype != CONVERSATION_UDP)
2123 | {
2124 | if (!(conversation->options & CONVERSATION_TEMPLATE0x08))
2125 | {
2126 | if (!(conversation->options & NO_ADDR20x01))
2127 | conversation_set_addr2(conversation, addr_b);
2128 | if (!(conversation->options & NO_PORT20x02))
2129 | conversation_set_port2(conversation, port_b);
2130 | }
2131 | else
2132 | {
2133 | conversation =
2134 | conversation_create_from_template(conversation, addr_b, port_b);
2135 | }
2136 | }
2137 | goto end;
2138 | }
2139 | /* for Infiniband, don't try to look in addresses of reverse
2140 | * direction, because it could be another different
2141 | * valid conversation than what is being searched using
2142 | * addr_a, port_a.
2143 | */
2144 | if (ctype != CONVERSATION_IBQP)
2145 | {
2146 |
2147 | /*
2148 | * Well, that didn't find anything.
2149 | * If search address and port B were specified, try looking for a
2150 | * conversation with the specified address B and port B as the
2151 | * first address and port, and with any second address and port
2152 | * (this packet may be going in the opposite direction from the
2153 | * first packet in the conversation).
2154 | * (Neither "addr_a" nor "port_a" take part in this lookup.)
2155 | */
2156 | if (addr_a->type == AT_FC) {
2157 | DPRINT(("trying wildcarded match: %s:%d -> *:*",(void)0
2158 | addr_b_str, port_a))(void)0;
2159 | conversation = conversation_lookup_no_addr2_or_port2(frame_num, addr_b, port_a, ctype);
2160 | } else {
2161 | DPRINT(("trying wildcarded match: %s:%d -> *:*",(void)0
2162 | addr_b_str, port_b))(void)0;
2163 | conversation = conversation_lookup_no_addr2_or_port2(frame_num, addr_b, port_b, ctype);
2164 | }
2165 | if (conversation != NULL((void*)0)) {
2166 | /*
2167 | * If this is for a connection-oriented protocol, set the
2168 | * second address for this conversation to address A, as
2169 | * that's the address that matched the wildcarded second
2170 | * address for this conversation, and set the second port
2171 | * for this conversation to port A, as that's the port
2172 | * that matched the wildcarded second port for this
2173 | * conversation.
2174 | */
2175 | DPRINT(("match found"))(void)0;
2176 | if (ctype != CONVERSATION_UDP)
2177 | {
2178 | if (!(conversation->options & CONVERSATION_TEMPLATE0x08))
2179 | {
2180 | conversation_set_addr2(conversation, addr_a);
2181 | conversation_set_port2(conversation, port_a);
2182 | }
2183 | else
2184 | {
2185 | conversation = conversation_create_from_template(conversation, addr_a, port_a);
2186 | }
2187 | }
2188 | goto end;
2189 | }
2190 | }
2191 | }
2192 |
2193 | /*
2194 | * Well, that didn't find anything. Try matches between two
2195 | * addresses, but no ports. Typically ETH and IP protocols fall
2196 | * into this category.
2197 | *
2198 | * First try looking for a conversation with the specified address A
2199 | * and address B.
2200 | * (Neither "port_a" nor "port_b" take part in this lookup.)
2201 | */
2202 | if (options & NO_PORT_X0x00040000) {
2203 | /*
2204 | * Search for conversations between two addresses, strictly
2205 | */
2206 | DPRINT(("trying exact match: %s -> %s",(void)0
2207 | addr_a_str, addr_b_str))(void)0;
2208 | conversation = conversation_lookup_no_ports(frame_num, addr_a, addr_b, ctype);
2209 |
2210 | if (conversation != NULL((void*)0)) {
2211 | DPRINT(("match found"))(void)0;
2212 | goto end;
2213 | }
2214 | /*
2215 | * Look for a conversation in the opposite direction.
2216 | */
2217 | else {
2218 | DPRINT(("trying exact match: %s -> %s",(void)0
2219 | addr_b_str, addr_a_str))(void)0;
2220 | conversation = conversation_lookup_no_ports(frame_num, addr_b, addr_a, ctype);
2221 | if (conversation != NULL((void*)0)) {
2222 | DPRINT(("match found"))(void)0;
2223 | goto end;
2224 | }
2225 | }
2226 | }
2227 |
2228 | DPRINT(("no matches found"))(void)0;
2229 |
2230 | /*
2231 | * We found no conversation.
2232 | */
2233 | conversation = NULL((void*)0);
2234 |
2235 | end:
2236 | DINSTR(wmem_free(NULL, addr_a_str))(void)0;
2237 | DINSTR(wmem_free(NULL, addr_b_str))(void)0;
2238 | return conversation;
2239 | }
2240 |
2241 | conversation_t *
2242 | find_conversation_deinterlaced(const uint32_t frame_num, const address *addr_a, const address *addr_b, const conversation_type ctype,
2243 | const uint32_t port_a, const uint32_t port_b, const uint32_t anchor, const unsigned options)
2244 | {
2245 | conversation_t *conversation, *other_conv;
2246 |
2247 | if (!addr_a) {
2248 | addr_a = &null_address_;
2249 | }
2250 |
2251 | if (!addr_b) {
2252 | addr_b = &null_address_;
2253 | }
2254 |
2255 | DINSTR(char *addr_a_str = address_to_str(NULL, addr_a))(void)0;
2256 | DINSTR(char *addr_b_str = address_to_str(NULL, addr_b))(void)0;
2257 |
2258 | /*
2259 | * First try an exact match, if we have two addresses and ports.
2260 | */
2261 | if (!(options & (NO_ADDR_B0x00010000|NO_PORT_B0x00020000|NO_PORTS0x010|EXACT_EXCLUDED0x00200000) )) {
2262 | /*
2263 | * Neither search address B nor search port B are wildcarded,
2264 | * start out with an exact match.
2265 | */
2266 | DPRINT(("trying exact match: %s:%d -> %s:%d",(void)0
2267 | addr_a_str, port_a, addr_b_str, port_b))(void)0;
2268 | conversation = conversation_lookup_exact_anc(frame_num, addr_a, port_a, addr_b, port_b, ctype, anchor);
2269 | /*
2270 | * Look for an alternate conversation in the opposite direction, which
2271 | * might fit better. Note that using the helper functions such as
2272 | * find_conversation_pinfo and find_or_create_conversation will finally
2273 | * call this function and look for an orientation-agnostic conversation.
2274 | * If oriented conversations had to be implemented, amend this code or
2275 | * create new functions.
2276 | */
2277 |
2278 | DPRINT(("trying exact match: %s:%d -> %s:%d",(void)0
2279 | addr_b_str, port_b, addr_a_str, port_a))(void)0;
2280 | other_conv = conversation_lookup_exact_anc(frame_num, addr_b, port_b, addr_a, port_a, ctype, anchor);
2281 | if (other_conv != NULL((void*)0)) {
2282 | if (conversation != NULL((void*)0)) {
2283 | if(other_conv->conv_index > conversation->conv_index) {
2284 | conversation = other_conv;
2285 | }
2286 | }
2287 | else {
2288 | conversation = other_conv;
2289 | }
2290 | }
2291 | if ((conversation == NULL((void*)0)) && (addr_a->type == AT_FC)) {
2292 | /* In Fibre channel, OXID & RXID are never swapped as
2293 | * TCP/UDP ports are in TCP/IP.
2294 | */
2295 | DPRINT(("trying exact match: %s:%d -> %s:%d",(void)0
2296 | addr_b_str, port_a, addr_a_str, port_b))(void)0;
2297 | conversation = conversation_lookup_exact_anc(frame_num, addr_b, port_a, addr_a, port_b, ctype, anchor);
2298 | }
2299 | DPRINT(("exact match %sfound",conversation?"":"not "))(void)0;
2300 | if (conversation != NULL((void*)0)) {
2301 | goto end;
2302 | }
2303 | else if(options & NO_GREEDY0x00100000) {
2304 | goto end;
2305 | }
2306 | }
2307 |
2308 | /*
2309 | * Well, that didn't find anything. Try matches that wildcard
2310 | * one of the addresses, if we have two ports.
2311 | */
2312 | if (!(options & (NO_PORT_B0x00020000|NO_PORTS0x010))) {
2313 | /*
2314 | * Search port B isn't wildcarded.
2315 | *
2316 | * First try looking for a conversation with the specified
2317 | * address A and port A as the first address and port, and
2318 | * with any address and the specified port B as the second
2319 | * address and port.
2320 | * ("addr_b" doesn't take part in this lookup.)
2321 | */
2322 | DPRINT(("trying wildcarded match: %s:%d -> *:%d",(void)0
2323 | addr_a_str, port_a, port_b))(void)0;
2324 | conversation = conversation_lookup_no_addr2_anc(frame_num, addr_a, port_a, port_b, ctype, anchor);
2325 | if ((conversation == NULL((void*)0)) && (addr_a->type == AT_FC)) {
2326 | /* In Fibre channel, OXID & RXID are never swapped as
2327 | * TCP/UDP ports are in TCP/IP.
2328 | */
2329 | DPRINT(("trying wildcarded match: %s:%d -> *:%d",(void)0
2330 | addr_b_str, port_a, port_b))(void)0;
2331 | conversation = conversation_lookup_no_addr2_anc(frame_num, addr_b, port_a, port_b, ctype, anchor);
2332 | }
2333 | if (conversation != NULL((void*)0)) {
2334 | /*
2335 | * If search address B isn't wildcarded, and this is for a
2336 | * connection-oriented protocol, set the second address for this
2337 | * conversation to address B, as that's the address that matched the
2338 | * wildcarded second address for this conversation.
2339 | *
2340 | * (This assumes that, for all connection oriented protocols, the
2341 | * endpoints of a connection have only one address each, i.e. you
2342 | * don't get packets in a given direction coming from more than one
2343 | * address, unless the CONVERSATION_TEMPLATE option is set.)
2344 | */
2345 | DPRINT(("wildcarded dest address match found"))(void)0;
2346 | if (!(conversation->options & NO_ADDR20x01) && ctype != CONVERSATION_UDP)
2347 | {
2348 | if (!(conversation->options & CONVERSATION_TEMPLATE0x08))
2349 | {
2350 | conversation_set_addr2(conversation, addr_b);
2351 | }
2352 | else
2353 | {
2354 | conversation =
2355 | conversation_create_from_template(conversation, addr_b, 0);
2356 | }
2357 | }
2358 | goto end;
2359 | }
2360 |
2361 | /*
2362 | * Well, that didn't find anything.
2363 | * If search address B was specified, try looking for a
2364 | * conversation with the specified address B and port B as
2365 | * the first address and port, and with any address and the
2366 | * specified port A as the second address and port (this
2367 | * packet may be going in the opposite direction from the
2368 | * first packet in the conversation).
2369 | * ("addr_a" doesn't take part in this lookup.)
2370 | */
2371 | if (!(options & NO_ADDR_B0x00010000)) {
2372 | DPRINT(("trying wildcarded match: %s:%d -> *:%d",(void)0
2373 | addr_b_str, port_b, port_a))(void)0;
2374 | conversation = conversation_lookup_no_addr2_anc(frame_num, addr_b, port_b, port_a, ctype, anchor);
2375 | if (conversation != NULL((void*)0)) {
2376 | /*
2377 | * If this is for a connection-oriented
2378 | * protocol, set the second address for
2379 | * this conversation to address A, as
2380 | * that's the address that matched the
2381 | * wildcarded second address for this
2382 | * conversation.
2383 | */
2384 | DPRINT(("match found"))(void)0;
2385 | if (ctype != CONVERSATION_UDP) {
2386 | if (!(conversation->options & CONVERSATION_TEMPLATE0x08))
2387 | {
2388 | conversation_set_addr2(conversation, addr_a);
2389 | }
2390 | else
2391 | {
2392 | conversation =
2393 | conversation_create_from_template(conversation, addr_a, 0);
2394 | }
2395 | }
2396 | goto end;
2397 | }
2398 | }
2399 | }
2400 |
2401 | /*
2402 | * Well, that didn't find anything. Try matches that wildcard
2403 | * one of the ports, if we have two addresses.
2404 | */
2405 | if (!(options & (NO_ADDR_B0x00010000|NO_PORTS0x010))) {
2406 | /*
2407 | * Search address B isn't wildcarded.
2408 | *
2409 | * First try looking for a conversation with the specified
2410 | * address A and port A as the first address and port, and
2411 | * with the specified address B and any port as the second
2412 | * address and port.
2413 | * ("port_b" doesn't take part in this lookup.)
2414 | */
2415 | DPRINT(("trying wildcarded match: %s:%d -> %s:*",(void)0
2416 | addr_a_str, port_a, addr_b_str))(void)0;
2417 | conversation = conversation_lookup_no_port2_anc(frame_num, addr_a, port_a, addr_b, ctype, anchor);
2418 | if ((conversation == NULL((void*)0)) && (addr_a->type == AT_FC)) {
2419 | /* In Fibre channel, OXID & RXID are never swapped as
2420 | * TCP/UDP ports are in TCP/IP
2421 | */
2422 | DPRINT(("trying wildcarded match: %s:%d -> %s:*", addr_b_str, port_a, addr_a_str))(void)0;
2423 | conversation = conversation_lookup_no_port2_anc(frame_num, addr_b, port_a, addr_a, ctype, anchor);
2424 | }
2425 | if (conversation != NULL((void*)0)) {
2426 | /*
2427 | * If search port B isn't wildcarded, and this is for a connection-
2428 | * oriented protocol, set the second port for this conversation to
2429 | * port B, as that's the port that matched the wildcarded second port
2430 | * for this conversation.
2431 | *
2432 | * (This assumes that, for all connection oriented protocols, the
2433 | * endpoints of a connection have only one port each, i.e. you don't
2434 | * get packets in a given direction coming from more than one port,
2435 | * unless the CONVERSATION_TEMPLATE option is set.)
2436 | */
2437 | DPRINT(("match found"))(void)0;
2438 | if (!(conversation->options & NO_PORT20x02) && ctype != CONVERSATION_UDP)
2439 | {
2440 | if (!(conversation->options & CONVERSATION_TEMPLATE0x08))
2441 | {
2442 | conversation_set_port2(conversation, port_b);
2443 | }
2444 | else
2445 | {
2446 | conversation =
2447 | conversation_create_from_template(conversation, 0, port_b);
2448 | }
2449 | }
2450 | goto end;
2451 | }
2452 |
2453 | /*
2454 | * Well, that didn't find anything.
2455 | * If search port B was specified, try looking for a
2456 | * conversation with the specified address B and port B
2457 | * as the first address and port, and with the specified
2458 | * address A and any port as the second address and port
2459 | * (this packet may be going in the opposite direction
2460 | * from the first packet in the conversation).
2461 | * ("port_a" doesn't take part in this lookup.)
2462 | */
2463 | if (!(options & NO_PORT_B0x00020000)) {
2464 | DPRINT(("trying wildcarded match: %s:%d -> %s:*",(void)0
2465 | addr_b_str, port_b, addr_a_str))(void)0;
2466 | conversation = conversation_lookup_no_port2_anc(frame_num, addr_b, port_b, addr_a, ctype, anchor);
2467 | if (conversation != NULL((void*)0)) {
2468 | /*
2469 | * If this is for a connection-oriented
2470 | * protocol, set the second port for
2471 | * this conversation to port A, as
2472 | * that's the address that matched the
2473 | * wildcarded second address for this
2474 | * conversation.
2475 | */
2476 | DPRINT(("match found"))(void)0;
2477 | if (ctype != CONVERSATION_UDP)
2478 | {
2479 | if (!(conversation->options & CONVERSATION_TEMPLATE0x08))
2480 | {
2481 | conversation_set_port2(conversation, port_a);
2482 | }
2483 | else
2484 | {
2485 | conversation =
2486 | conversation_create_from_template(conversation, 0, port_a);
2487 | }
2488 | }
2489 | goto end;
2490 | }
2491 | }
2492 | if(options & NO_GREEDY0x00100000) {
2493 | goto end;
2494 | }
2495 | }
2496 |
2497 | /*
2498 | * Well, that didn't find anything. Try matches that wildcard
2499 | * one address/port pair.
2500 | *
2501 | * First try looking for a conversation with the specified address A
2502 | * and port A as the first address and port.
2503 | * (Neither "addr_b" nor "port_b" take part in this lookup.)
2504 | */
2505 | DPRINT(("trying wildcarded match: %s:%d -> *:*", addr_a_str, port_a))(void)0;
2506 | conversation = conversation_lookup_no_addr2_or_port2_anc(frame_num, addr_a, port_a, ctype, anchor);
2507 | if (conversation != NULL((void*)0)) {
2508 | /*
2509 | * If this is for a connection-oriented protocol:
2510 | *
2511 | * if search address B isn't wildcarded, set the
2512 | * second address for this conversation to address
2513 | * B, as that's the address that matched the
2514 | * wildcarded second address for this conversation;
2515 | *
2516 | * if search port B isn't wildcarded, set the
2517 | * second port for this conversation to port B,
2518 | * as that's the port that matched the wildcarded
2519 | * second port for this conversation.
2520 | */
2521 | DPRINT(("match found"))(void)0;
2522 | if (ctype != CONVERSATION_UDP)
2523 | {
2524 | if (!(conversation->options & CONVERSATION_TEMPLATE0x08))
2525 | {
2526 | if (!(conversation->options & NO_ADDR20x01))
2527 | conversation_set_addr2(conversation, addr_b);
2528 | if (!(conversation->options & NO_PORT20x02))
2529 | conversation_set_port2(conversation, port_b);
2530 | }
2531 | else
2532 | {
2533 | conversation =
2534 | conversation_create_from_template(conversation, addr_b, port_b);
2535 | }
2536 | }
2537 | goto end;
2538 | }
2539 |
2540 | /* for Infiniband, don't try to look in addresses of reverse
2541 | * direction, because it could be another different
2542 | * valid conversation than what is being searched using
2543 | * addr_a, port_a.
2544 | */
2545 | if (ctype != CONVERSATION_IBQP)
2546 | {
2547 |
2548 | /*
2549 | * Well, that didn't find anything.
2550 | * If search address and port B were specified, try looking for a
2551 | * conversation with the specified address B and port B as the
2552 | * first address and port, and with any second address and port
2553 | * (this packet may be going in the opposite direction from the
2554 | * first packet in the conversation).
2555 | * (Neither "addr_a" nor "port_a" take part in this lookup.)
2556 | */
2557 | if (addr_a->type == AT_FC) {
2558 | DPRINT(("trying wildcarded match: %s:%d -> *:*",(void)0
2559 | addr_b_str, port_a))(void)0;
2560 | conversation = conversation_lookup_no_addr2_or_port2_anc(frame_num, addr_b, port_a, ctype, anchor);
2561 | } else {
2562 | DPRINT(("trying wildcarded match: %s:%d -> *:*",(void)0
2563 | addr_b_str, port_b))(void)0;
2564 | conversation = conversation_lookup_no_addr2_or_port2_anc(frame_num, addr_b, port_b, ctype, anchor);
2565 | }
2566 | if (conversation != NULL((void*)0)) {
2567 | /*
2568 | * If this is for a connection-oriented protocol, set the
2569 | * second address for this conversation to address A, as
2570 | * that's the address that matched the wildcarded second
2571 | * address for this conversation, and set the second port
2572 | * for this conversation to port A, as that's the port
2573 | * that matched the wildcarded second port for this
2574 | * conversation.
2575 | */
2576 | DPRINT(("match found"))(void)0;
2577 | if (ctype != CONVERSATION_UDP)
2578 | {
2579 | if (!(conversation->options & CONVERSATION_TEMPLATE0x08))
2580 | {
2581 | conversation_set_addr2(conversation, addr_a);
2582 | conversation_set_port2(conversation, port_a);
2583 | }
2584 | else
2585 | {
2586 | conversation = conversation_create_from_template(conversation, addr_a, port_a);
2587 | }
2588 | }
2589 | goto end;
2590 | }
2591 | }
2592 |
2593 | if (options & NO_PORT_X0x00040000) {
2594 | /*
2595 | * Search for conversations between two addresses, strictly
2596 | */
2597 | DPRINT(("trying exact match: %s -> %s",(void)0
2598 | addr_a_str, addr_b_str))(void)0;
2599 | conversation = conversation_lookup_no_ports_anc(frame_num, addr_a, addr_b, ctype, anchor);
2600 |
2601 | if (conversation != NULL((void*)0)) {
2602 | DPRINT(("match found"))(void)0;
2603 | goto end;
2604 | }
2605 | else {
2606 | conversation = conversation_lookup_no_ports_anc(frame_num, addr_b, addr_a, ctype, anchor);
2607 | if (conversation != NULL((void*)0)) {
2608 | DPRINT(("match found"))(void)0;
2609 | goto end;
2610 | }
2611 | }
2612 | }
2613 |
2614 | DPRINT(("no matches found"))(void)0;
2615 |
2616 | /*
2617 | * We found no conversation.
2618 | */
2619 | conversation = NULL((void*)0);
2620 |
2621 | end:
2622 |
2623 | DINSTR(wmem_free(NULL, addr_a_str))(void)0;
2624 | DINSTR(wmem_free(NULL, addr_b_str))(void)0;
2625 | return conversation;
2626 | }
2627 |
2628 | conversation_t *
2629 | find_conversation_deinterlacer(const uint32_t frame_num, const address *addr_a, const address *addr_b,
2630 | const conversation_type ctype, const uint32_t key_a, const uint32_t key_b, const uint32_t key_c)
2631 | {
2632 | conversation_t *conversation, *other_conv;
2633 |
2634 | conversation = conversation_lookup_deinterlacer(frame_num, addr_a, addr_b, ctype, key_a, key_b, key_c);
2635 |
2636 | other_conv = conversation_lookup_deinterlacer(frame_num, addr_b, addr_a, ctype, key_a, key_b, key_c);
2637 | if (other_conv != NULL((void*)0)) {
2638 | if (conversation != NULL((void*)0)) {
2639 | if(other_conv->conv_index > conversation->conv_index) {
2640 | conversation = other_conv;
2641 | }
2642 | }
2643 | else {
2644 | conversation = other_conv;
2645 | }
2646 | }
2647 |
2648 | return conversation;
2649 | }
2650 |
2651 | conversation_t *
2652 | find_conversation_deinterlacer_pinfo(const packet_info *pinfo)
2653 | {
2654 | conversation_t *conv=NULL((void*)0);
2655 | unsigned dr_conv_type; /* deinterlacer conv type */
2656 | uint32_t dtlc_iface = 0;
2657 | uint32_t dtlc_vlan = 0;
2658 |
2659 | /* evaluate the execution context: user pref, interface, VLAN */
2660 | if(prefs.conversation_deinterlacing_key>0) {
2661 | if(prefs.conversation_deinterlacing_key&CONV_DEINT_KEY_INTERFACE0x02 &&
2662 | pinfo->rec->presence_flags & WTAP_HAS_INTERFACE_ID0x00000004) {
2663 |
2664 | if(prefs.conversation_deinterlacing_key&CONV_DEINT_KEY_VLAN0x08 &&
2665 | pinfo->vlan_id>0) {
2666 |
2667 | dr_conv_type = CONVERSATION_ETH_IV;
2668 | dtlc_vlan = pinfo->vlan_id;
2669 | }
2670 | else {
2671 | dr_conv_type = CONVERSATION_ETH_IN;
2672 | }
2673 | dtlc_iface = pinfo->rec->rec_header.packet_header.interface_id;
2674 | }
2675 | else {
2676 | if(prefs.conversation_deinterlacing_key&CONV_DEINT_KEY_VLAN0x08 &&
2677 | pinfo->vlan_id>0) {
2678 |
2679 | dr_conv_type = CONVERSATION_ETH_NV;
2680 | dtlc_vlan = pinfo->vlan_id;
2681 | }
2682 | else {
2683 | dr_conv_type = CONVERSATION_ETH_NN;
2684 | }
2685 | }
2686 |
2687 | conv = find_conversation_deinterlacer(pinfo->num, &pinfo->dl_src, &pinfo->dl_dst, dr_conv_type, dtlc_iface, dtlc_vlan , 0);
2688 | }
2689 |
2690 | return conv;
2691 | }
2692 |
2693 | conversation_t *
2694 | find_conversation_by_id(const uint32_t frame, const conversation_type ctype, const uint32_t id)
2695 | {
2696 | conversation_element_t elements[2] = {
2697 | { CE_UINT, .uint_val = id },
2698 | { CE_CONVERSATION_TYPE, .conversation_type_val = ctype }
2699 | };
2700 |
2701 | return conversation_lookup_hashtable(conversation_hashtable_id, frame, elements);
2702 | }
2703 |
2704 | static gboolean
2705 | find_conversation_by_index(void *key _U___attribute__((unused)), void *value, void *user_data)
2706 | {
2707 | uint32_t convid = GPOINTER_TO_UINT(user_data)((guint) (gulong) (user_data));
2708 | conversation_t *conv = (conversation_t*)value;
2709 | if (conv->conv_index == convid) {
2710 | return TRUE(!(0));
2711 | }
2712 | return FALSE(0);
2713 | }
2714 |
2715 | conversation_t *
2716 | find_conversation_err_pkts(const uint32_t frame, const conversation_type ctype, const uint32_t id, const uint32_t rid)
2717 | {
2718 | conversation_element_t elements[3] = {
2719 | { CE_UINT, .uint_val = id },
2720 | { CE_UINT, .uint_val = rid },
2721 | { CE_CONVERSATION_TYPE, .conversation_type_val = ctype }
2722 | };
2723 |
2724 | return conversation_lookup_hashtable(conversation_hashtable_err_pkts, frame, elements);
2725 | }
2726 |
2727 | void
2728 | conversation_add_proto_data(conversation_t *conv, const int proto, void *proto_data)
2729 | {
2730 | if (conv == NULL((void*)0)) {
2731 | REPORT_DISSECTOR_BUG("%s: Can't add proto data to a NULL conversation.", proto_get_protocol_name(proto))proto_report_dissector_bug("%s: Can't add proto data to a NULL conversation." , proto_get_protocol_name(proto));
2732 | }
2733 | /* Add it to the list of items for this conversation. */
2734 | if (conv->data_list == NULL((void*)0))
2735 | conv->data_list = wmem_tree_new(wmem_file_scope());
2736 |
2737 | wmem_tree_insert32(conv->data_list, proto, proto_data);
2738 | }
2739 |
2740 | void *
2741 | conversation_get_proto_data(const conversation_t *conv, const int proto)
2742 | {
2743 | if (conv == NULL((void*)0)) {
2744 | REPORT_DISSECTOR_BUG("%s: Can't get proto from a NULL conversation.", proto_get_protocol_name(proto))proto_report_dissector_bug("%s: Can't get proto from a NULL conversation." , proto_get_protocol_name(proto));
2745 | }
2746 | /* No tree created yet */
2747 | if (conv->data_list == NULL((void*)0)) {
2748 | return NULL((void*)0);
2749 | }
2750 |
2751 | return wmem_tree_lookup32(conv->data_list, proto);
2752 | }
2753 |
2754 | void
2755 | conversation_delete_proto_data(conversation_t *conv, const int proto)
2756 | {
2757 | if (conv == NULL((void*)0)) {
2758 | REPORT_DISSECTOR_BUG("%s: Can't delete a NULL conversation.", proto_get_protocol_name(proto))proto_report_dissector_bug("%s: Can't delete a NULL conversation." , proto_get_protocol_name(proto));
2759 | }
2760 | if (conv->data_list != NULL((void*)0))
2761 | wmem_tree_remove32(conv->data_list, proto);
2762 | }
2763 |
2764 | void
2765 | conversation_set_dissector_from_frame_number(conversation_t *conversation,
2766 | const uint32_t starting_frame_num, const dissector_handle_t handle)
2767 | {
2768 | if (!conversation->dissector_tree) {
2769 | conversation->dissector_tree = wmem_tree_new(wmem_file_scope());
2770 | }
2771 | wmem_tree_insert32(conversation->dissector_tree, starting_frame_num, (void *)handle);
2772 | }
2773 |
2774 | void
2775 | conversation_set_dissector(conversation_t *conversation, const dissector_handle_t handle)
2776 | {
2777 | conversation_set_dissector_from_frame_number(conversation, 0, handle);
2778 | }
2779 |
2780 | dissector_handle_t
2781 | conversation_get_dissector(conversation_t *conversation, const uint32_t frame_num)
2782 | {
2783 | if (!conversation->dissector_tree) {
2784 | return NULL((void*)0);
2785 | }
2786 | return (dissector_handle_t)wmem_tree_lookup32_le(conversation->dissector_tree, frame_num);
2787 | }
2788 |
2789 | static bool_Bool
2790 | try_conversation_call_dissector_helper(conversation_t *conversation, bool_Bool* dissector_success,
2791 | tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data)
2792 | {
2793 | if (!conversation->dissector_tree) {
2794 | return false0;
2795 | }
2796 |
2797 | int ret;
2798 | dissector_handle_t handle = (dissector_handle_t)wmem_tree_lookup32_le(
2799 | conversation->dissector_tree, pinfo->num);
2800 | if (handle == NULL((void*)0)) {
2801 | return false0;
2802 | }
2803 |
2804 | ret = call_dissector_only(handle, tvb, pinfo, tree, data);
2805 |
2806 | /* Let the caller decide what to do with success or rejection */
2807 | (*dissector_success) = (ret != 0);
2808 |
2809 | return true1;
2810 | }
2811 |
2812 | /*
2813 | * Given two address/port pairs for a packet, search for a matching
2814 | * conversation and, if found and it has a conversation dissector,
2815 | * call that dissector and return true, otherwise return false.
2816 | *
2817 | * This helper uses call_dissector_only which will NOT call the default
2818 | * "data" dissector if the packet was rejected.
2819 | * Our caller is responsible to call the data dissector explicitly in case
2820 | * this function returns false.
2821 | */
2822 | bool_Bool
2823 | try_conversation_dissector(const address *addr_a, const address *addr_b, const conversation_type ctype,
2824 | const uint32_t port_a, const uint32_t port_b, tvbuff_t *tvb, packet_info *pinfo,
2825 | proto_tree *tree, void* data, const unsigned options)
2826 | {
2827 | conversation_t *conversation;
2828 | bool_Bool dissector_success;
2829 |
2830 | /*
2831 | * Verify that the correct options are used, if any.
2832 | */
2833 | DISSECTOR_ASSERT_HINT((options == 0) || (options & NO_MASK_B), "Use NO_ADDR_B and/or NO_PORT_B as option")((void) (((options == 0) || (options & 0xFFFF0000)) ? (void )0 : (proto_report_dissector_bug("%s:%u: failed assertion \"%s\" (%s)" , "epan/conversation.c", 2833, "(options == 0) || (options & 0xFFFF0000)" , "Use NO_ADDR_B and/or NO_PORT_B as option"))));
2834 |
2835 | /* Try each mode based on option flags */
2836 | conversation = find_conversation(pinfo->num, addr_a, addr_b, ctype, port_a, port_b, 0);
2837 | if (conversation != NULL((void*)0)) {
2838 | if (try_conversation_call_dissector_helper(conversation, &dissector_success, tvb, pinfo, tree, data))
2839 | return dissector_success;
2840 | }
2841 |
2842 | if (options & NO_ADDR_B0x00010000) {
2843 | conversation = find_conversation(pinfo->num, addr_a, addr_b, ctype, port_a, port_b, NO_ADDR_B0x00010000);
2844 | if (conversation != NULL((void*)0)) {
2845 | if (try_conversation_call_dissector_helper(conversation, &dissector_success, tvb, pinfo, tree, data))
2846 | return dissector_success;
2847 | }
2848 | }
2849 |
2850 | if (options & NO_PORT_B0x00020000) {
2851 | conversation = find_conversation(pinfo->num, addr_a, addr_b, ctype, port_a, port_b, NO_PORT_B0x00020000);
2852 | if (conversation != NULL((void*)0)) {
2853 | if (try_conversation_call_dissector_helper(conversation, &dissector_success, tvb, pinfo, tree, data))
2854 | return dissector_success;
2855 | }
2856 | }
2857 |
2858 | if (options & (NO_ADDR_B0x00010000|NO_PORT_B0x00020000)) {
2859 | conversation = find_conversation(pinfo->num, addr_a, addr_b, ctype, port_a, port_b, NO_ADDR_B0x00010000|NO_PORT_B0x00020000);
2860 | if (conversation != NULL((void*)0)) {
2861 | if (try_conversation_call_dissector_helper(conversation, &dissector_success, tvb, pinfo, tree, data))
2862 | return dissector_success;
2863 | }
2864 | }
2865 |
2866 | return false0;
2867 | }
2868 |
2869 | /*
2870 | * Similar to try_conversation_dissector() with the particularity of calling
2871 | * find_conversation_strat() in place of find_conversation() everywhere.
2872 | */
2873 | bool_Bool
2874 | try_conversation_dissector_strat(packet_info *pinfo, const conversation_type ctype,
2875 | tvbuff_t *tvb, proto_tree *tree, void* data, const unsigned options, const bool_Bool direction)
2876 | {
2877 | conversation_t *conversation;
2878 | bool_Bool dissector_success;
2879 |
2880 | /*
2881 | * Verify that the correct options are used, if any.
2882 | */
2883 | DISSECTOR_ASSERT_HINT((options == 0) || (options & NO_MASK_B), "Use NO_ADDR_B and/or NO_PORT_B as option")((void) (((options == 0) || (options & 0xFFFF0000)) ? (void )0 : (proto_report_dissector_bug("%s:%u: failed assertion \"%s\" (%s)" , "epan/conversation.c", 2883, "(options == 0) || (options & 0xFFFF0000)" , "Use NO_ADDR_B and/or NO_PORT_B as option"))));
2884 |
2885 | /* Try each mode based on option flags */
2886 | conversation = find_conversation_strat(pinfo, ctype, 0, direction);
2887 | if (conversation != NULL((void*)0)) {
2888 | if (try_conversation_call_dissector_helper(conversation, &dissector_success, tvb, pinfo, tree, data))
2889 | return dissector_success;
2890 | }
2891 |
2892 | if (options & NO_ADDR_B0x00010000) {
2893 | conversation = find_conversation_strat(pinfo, ctype, NO_ADDR_B0x00010000, direction);
2894 | if (conversation != NULL((void*)0)) {
2895 | if (try_conversation_call_dissector_helper(conversation, &dissector_success, tvb, pinfo, tree, data))
2896 | return dissector_success;
2897 | }
2898 | }
2899 |
2900 | if (options & NO_PORT_B0x00020000) {
2901 | conversation = find_conversation_strat(pinfo, ctype, NO_PORT_B0x00020000, direction);
2902 | if (conversation != NULL((void*)0)) {
2903 | if (try_conversation_call_dissector_helper(conversation, &dissector_success, tvb, pinfo, tree, data)) {
2904 | return dissector_success;
2905 | }
2906 | }
2907 |
2908 | }
2909 |
2910 | if (options & (NO_ADDR_B0x00010000|NO_PORT_B0x00020000)) {
2911 | conversation = find_conversation_strat(pinfo, ctype, NO_ADDR_B0x00010000|NO_PORT_B0x00020000, direction);
2912 | if (conversation != NULL((void*)0)) {
2913 | if (try_conversation_call_dissector_helper(conversation, &dissector_success, tvb, pinfo, tree, data)) {
2914 | return dissector_success;
2915 | }
2916 | }
2917 | }
2918 |
2919 | return false0;
2920 | }
2921 |
2922 | bool_Bool
2923 | try_conversation_dissector_by_id(const conversation_type ctype, const uint32_t id, tvbuff_t *tvb,
2924 | packet_info *pinfo, proto_tree *tree, void* data)
2925 | {
2926 | conversation_t *conversation;
2927 |
2928 | conversation = find_conversation_by_id(pinfo->num, ctype, id);
2929 |
2930 | if (conversation != NULL((void*)0)) {
2931 | if (!conversation->dissector_tree) {
2932 | return false0;
2933 | }
2934 |
2935 | int ret;
2936 | dissector_handle_t handle = (dissector_handle_t)wmem_tree_lookup32_le(conversation->dissector_tree, pinfo->num);
2937 |
2938 | if (handle == NULL((void*)0)) {
2939 | return false0;
2940 | }
2941 |
2942 | ret = call_dissector_only(handle, tvb, pinfo, tree, data);
2943 | if (!ret) {
2944 | /* this packet was rejected by the dissector
2945 | * so return false in case our caller wants
2946 | * to do some cleaning up.
2947 | */
2948 | return false0;
2949 | }
2950 | return true1;
2951 | }
2952 | return false0;
2953 | }
2954 |
2955 | /* Identifies a conversation ("classic" or deinterlaced) */
2956 | conversation_t *
2957 | find_conversation_strat(const packet_info *pinfo, const conversation_type ctype, const unsigned options, const bool_Bool direction)
2958 | {
2959 | conversation_t *conv=NULL((void*)0);
2960 | if(is_deinterlacing_supported(pinfo)) {
2961 | conversation_t *underlying_conv = find_conversation_deinterlacer_pinfo(pinfo);
2962 | if(underlying_conv) {
2963 | if(direction) { // reverse flow (dst to src)
2964 | conv = find_conversation_deinterlaced(pinfo->num, &pinfo->dst, &pinfo->src, ctype, pinfo->destport, pinfo->srcport, underlying_conv->conv_index, options);
2965 | }
2966 | else {
2967 | conv = find_conversation_deinterlaced(pinfo->num, &pinfo->src, &pinfo->dst, ctype, pinfo->srcport, pinfo->destport, underlying_conv->conv_index, options);
2968 | }
2969 | }
2970 | }
2971 | else {
2972 | if(direction) { // reverse flow (dst to src)
2973 | conv = find_conversation(pinfo->num, &pinfo->dst, &pinfo->src, ctype, pinfo->destport, pinfo->srcport, options);
2974 | }
2975 | else { // default (src to dst)
2976 | conv = find_conversation(pinfo->num, &pinfo->src, &pinfo->dst, ctype, pinfo->srcport, pinfo->destport, options);
2977 | }
2978 | }
2979 | return conv;
2980 | }
2981 |
2982 | /* Identifies a conversation ("classic" or deinterlaced) */
2983 | conversation_t *
2984 | find_conversation_strat_xtd(const packet_info *pinfo, const uint32_t frame_num, const address *addr_a, const address *addr_b,
2985 | const conversation_type ctype, const uint32_t port_a, const uint32_t port_b, const unsigned options)
2986 | {
2987 | conversation_t *conv=NULL((void*)0);
2988 | if(is_deinterlacing_supported(pinfo)) {
2989 | conversation_t *underlying_conv = find_conversation_deinterlacer_pinfo(pinfo);
2990 | if(underlying_conv) {
2991 | conv = find_conversation_deinterlaced(frame_num, addr_a, addr_b, ctype, port_a, port_b, underlying_conv->conv_index, options);
2992 | }
2993 | }
2994 | else {
2995 | conv = find_conversation(frame_num, addr_a, addr_b, ctype, port_a, port_b, options);
2996 | }
2997 | return conv;
2998 | }
2999 |
3000 | /** A helper function that calls find_conversation() using data from pinfo
3001 | * The frame number and addresses are taken from pinfo.
3002 | */
3003 | conversation_t *
3004 | find_conversation_pinfo(const packet_info *pinfo, const unsigned options)
3005 | {
3006 | conversation_t *conv = NULL((void*)0);
3007 |
3008 | DINSTR(char *src_str = address_to_str(NULL, &pinfo->src))(void)0;
3009 | DINSTR(char *dst_str = address_to_str(NULL, &pinfo->dst))(void)0;
3010 | DPRINT(("called for frame #%u: %s:%d -> %s:%d (ptype=%d)",(void)0
3011 | pinfo->num, src_str, pinfo->srcport,(void)0
3012 | dst_str, pinfo->destport, pinfo->ptype))(void)0;
3013 | DINDENT()(void)0;
3014 | DINSTR(wmem_free(NULL, src_str))(void)0;
3015 | DINSTR(wmem_free(NULL, dst_str))(void)0;
3016 |
3017 | /* Have we seen this conversation before? */
3018 | if (pinfo->use_conv_addr_port_endpoints) {
3019 | DISSECTOR_ASSERT(pinfo->conv_addr_port_endpoints)((void) ((pinfo->conv_addr_port_endpoints) ? (void)0 : (proto_report_dissector_bug ("%s:%u: failed assertion \"%s\"", "epan/conversation.c", 3019 , "pinfo->conv_addr_port_endpoints"))));
3020 | if ((conv = find_conversation(pinfo->num, &pinfo->conv_addr_port_endpoints->addr1, &pinfo->conv_addr_port_endpoints->addr2,
3021 | pinfo->conv_addr_port_endpoints->ctype, pinfo->conv_addr_port_endpoints->port1,
3022 | pinfo->conv_addr_port_endpoints->port2, 0)) != NULL((void*)0)) {
3023 | DPRINT(("found previous conversation for frame #%u (last_frame=%d)",(void)0
3024 | pinfo->num, conv->last_frame))(void)0;
3025 | if (pinfo->num > conv->last_frame) {
3026 | conv->last_frame = pinfo->num;
3027 | }
3028 | }
3029 | } else if (pinfo->conv_elements) {
3030 | if ((conv = find_conversation_full(pinfo->num, pinfo->conv_elements)) != NULL((void*)0)) {
3031 | DPRINT(("found previous conversation elements for frame #%u (last_frame=%d)",(void)0
3032 | pinfo->num, conv->last_frame))(void)0;
3033 | if (pinfo->num > conv->last_frame) {
3034 | conv->last_frame = pinfo->num;
3035 | }
3036 | }
3037 | } else {
3038 | if ((conv = find_conversation(pinfo->num, &pinfo->src, &pinfo->dst,
3039 | conversation_pt_to_conversation_type(pinfo->ptype), pinfo->srcport,
3040 | pinfo->destport, options)) != NULL((void*)0)) {
3041 | DPRINT(("found previous conversation for frame #%u (last_frame=%d)",(void)0
3042 | pinfo->num, conv->last_frame))(void)0;
3043 | if (pinfo->num > conv->last_frame) {
3044 | conv->last_frame = pinfo->num;
3045 | }
3046 | }
3047 | }
3048 |
3049 | DENDENT()(void)0;
3050 |
3051 | return conv;
3052 | }
3053 |
3054 | conversation_t *
3055 | find_conversation_pinfo_deinterlaced(const packet_info *pinfo, const uint32_t anchor, const unsigned options)
3056 | {
3057 | conversation_t *conv = NULL((void*)0);
3058 |
3059 | DINSTR(char *src_str = address_to_str(NULL, &pinfo->src))(void)0;
3060 | DINSTR(char *dst_str = address_to_str(NULL, &pinfo->dst))(void)0;
3061 | DPRINT(("called for frame #%u: %s:%d -> %s:%d (ptype=%d)",(void)0
3062 | pinfo->num, src_str, pinfo->srcport,(void)0
3063 | dst_str, pinfo->destport, pinfo->ptype))(void)0;
3064 | DINDENT()(void)0;
3065 | DINSTR(wmem_free(NULL, src_str))(void)0;
3066 | DINSTR(wmem_free(NULL, dst_str))(void)0;
3067 |
3068 | /* Have we seen this conversation before? */
3069 | if (pinfo->use_conv_addr_port_endpoints) {
3070 | // For example, it's reached with EAPOL/TLS over Ethernet, see Issue #21027
3071 | DISSECTOR_ASSERT(pinfo->conv_addr_port_endpoints)((void) ((pinfo->conv_addr_port_endpoints) ? (void)0 : (proto_report_dissector_bug ("%s:%u: failed assertion \"%s\"", "epan/conversation.c", 3071 , "pinfo->conv_addr_port_endpoints"))));
3072 | if ((conv = find_conversation_deinterlaced(pinfo->num, &pinfo->conv_addr_port_endpoints->addr1, &pinfo->conv_addr_port_endpoints->addr2,
3073 | pinfo->conv_addr_port_endpoints->ctype, pinfo->conv_addr_port_endpoints->port1,
3074 | pinfo->conv_addr_port_endpoints->port2, anchor, 0)) != NULL((void*)0)) {
3075 | DPRINT(("found previous conversation for frame #%u (last_frame=%d)",(void)0
3076 | pinfo->num, conv->last_frame))(void)0;
3077 | if (pinfo->num > conv->last_frame) {
3078 | conv->last_frame = pinfo->num;
3079 | }
3080 | }
3081 | } else if (pinfo->conv_elements) {
3082 | // XXX - not implemented yet. Necessary ?
3083 | } else {
3084 | if ((conv = find_conversation_deinterlaced(pinfo->num, &pinfo->src, &pinfo->dst,
3085 | conversation_pt_to_conversation_type(pinfo->ptype), pinfo->srcport,
3086 | pinfo->destport, anchor, options)) != NULL((void*)0)) {
3087 | DPRINT(("found previous conversation for frame #%u (last_frame=%d)",(void)0
3088 | pinfo->num, conv->last_frame))(void)0;
3089 | if (pinfo->num > conv->last_frame) {
3090 | conv->last_frame = pinfo->num;
3091 | }
3092 | }
3093 | }
3094 |
3095 | DENDENT()(void)0;
3096 |
3097 | return conv;
3098 | }
3099 |
3100 | /*
3101 | * Returns true when deinterlacing is supported (file format) and enabled (user pref)
3102 | * Deinterlacing is only supported for the Ethernet wtap for now.
3103 | */
3104 | bool_Bool
3105 | is_deinterlacing_supported(const packet_info *pinfo)
3106 | {
3107 | if( (pinfo->pseudo_header != NULL((void*)0))
3108 | && (pinfo->rec->rec_header.packet_header.pkt_encap == WTAP_ENCAP_ETHERNET1)
3109 | && (prefs.conversation_deinterlacing_key>0)) {
3110 | return true1;
3111 | }
3112 | return false0;
3113 | }
3114 |
3115 | conversation_t *
3116 | find_conversation_pinfo_strat(const packet_info *pinfo, const unsigned options)
3117 | {
3118 | conversation_t *conv=NULL((void*)0);
3119 |
3120 | if(is_deinterlacing_supported(pinfo)) {
3121 |
3122 | conversation_t *underlying_conv = find_conversation_deinterlacer_pinfo(pinfo);
3123 |
3124 | if(underlying_conv) {
3125 | conv = find_conversation_pinfo_deinterlaced(pinfo, underlying_conv->conv_index, options);
3126 | }
3127 | }
3128 | else {
3129 | conv = find_conversation_pinfo(pinfo, options);
3130 | }
3131 |
3132 | return conv;
3133 | }
3134 |
3135 | /** A helper function that calls find_conversation() using data from pinfo,
3136 | * as above, but somewhat simplified for being accessed from packet_list.
3137 | * The frame number and addresses are taken from pinfo.
3138 | */
3139 | conversation_t *
3140 | find_conversation_pinfo_ro(const packet_info *pinfo, const unsigned options)
3141 | {
3142 | conversation_t *conv = NULL((void*)0);
3143 |
3144 | DINSTR(char *src_str = address_to_str(NULL, &pinfo->src))(void)0;
3145 | DINSTR(char *dst_str = address_to_str(NULL, &pinfo->dst))(void)0;
3146 | DPRINT(("called for frame #%u: %s:%d -> %s:%d (ptype=%d)",(void)0
3147 | pinfo->num, src_str, pinfo->srcport,(void)0
3148 | dst_str, pinfo->destport, pinfo->ptype))(void)0;
3149 | DINDENT()(void)0;
3150 | DINSTR(wmem_free(NULL, src_str))(void)0;
3151 | DINSTR(wmem_free(NULL, dst_str))(void)0;
3152 |
3153 | /* Have we seen this conversation before? */
3154 | if (pinfo->use_conv_addr_port_endpoints) {
3155 | DISSECTOR_ASSERT(pinfo->conv_addr_port_endpoints)((void) ((pinfo->conv_addr_port_endpoints) ? (void)0 : (proto_report_dissector_bug ("%s:%u: failed assertion \"%s\"", "epan/conversation.c", 3155 , "pinfo->conv_addr_port_endpoints"))));
3156 | if ((conv = find_conversation(pinfo->num, &pinfo->conv_addr_port_endpoints->addr1, &pinfo->conv_addr_port_endpoints->addr2,
3157 | pinfo->conv_addr_port_endpoints->ctype, pinfo->conv_addr_port_endpoints->port1,
3158 | pinfo->conv_addr_port_endpoints->port2, 0)) != NULL((void*)0)) {
3159 | DPRINT(("found previous conversation for frame #%u (last_frame=%d)",(void)0
3160 | pinfo->num, conv->last_frame))(void)0;
3161 | }
3162 | } else if (pinfo->conv_elements) {
3163 | if ((conv = find_conversation_full(pinfo->num, pinfo->conv_elements)) != NULL((void*)0)) {
3164 | DPRINT(("found previous conversation elements for frame #%u (last_frame=%d)",(void)0
3165 | pinfo->num, conv->last_frame))(void)0;
3166 | }
3167 | } else if ((conv = find_conversation_strat(pinfo, conversation_pt_to_conversation_type(pinfo->ptype), options, false0)) != NULL((void*)0)) {
3168 | DPRINT(("found previous conversation for frame #%u (last_frame=%d)",(void)0
3169 | pinfo->num, conv->last_frame))(void)0;
3170 | }
3171 | /* If none of the above found any ordinary conversation,
3172 | * we might be dealing with an error packet referencing/carrying a known conversation.
3173 | * ICMP Type 3/11 are good examples, give them a chance to be identified.
3174 | * Note, any Transport protocol might be updated to allow this mechanism to work.
3175 | */
3176 | else if( (pinfo->track_ctype>0) ) {
3177 |
3178 | /* reference id */
3179 | uint32_t conv_index = 0;
3180 |
3181 | /* Parse all keys and find the one matching id and ctype,
3182 | * the reference id is what we are looking for.
3183 | */
3184 | wmem_list_t *err_pkts_keys = wmem_map_get_keys(NULL((void*)0), conversation_hashtable_err_pkts);
3185 | for (wmem_list_frame_t *cur_frame = wmem_list_head(err_pkts_keys ); cur_frame; cur_frame = wmem_list_frame_next(cur_frame)) {
3186 | conversation_element_t *cet = (conversation_element_t *)wmem_list_frame_data(cur_frame);
3187 | if(cet) {
3188 | if( (cet[2].conversation_type_val == pinfo->track_ctype) && (cet[0].uint_val == pinfo->stream_id) ) {
3189 | conv_index = cet[1].uint_val;
3190 | break;
3191 | }
3192 | }
3193 | }
3194 | wmem_destroy_list(err_pkts_keys);
3195 |
3196 | /* Now, bring the transport conversation as we know its conv_index.
3197 | * Note: the way conversations are added (starting from lower layers),
3198 | * it's currently not possible to see a transport conversation
3199 | * with conv_index with value 0.
3200 | * XXX - Check if that is also true for PDU.
3201 | */
3202 | if(conv_index>0) {
3203 | conversation_t *tsconv = NULL((void*)0);
3204 |
3205 | /* If a deinterlacing key was requested, search for the conversation
3206 | * in the deinterlaced version of the "addr_port" table.
3207 | * XXX - as this check is becoming redundant, isolate it in a function ?
3208 | */
3209 | if(is_deinterlacing_supported(pinfo)) {
3210 | tsconv = wmem_map_find(conversation_hashtable_exact_addr_port_anc, find_conversation_by_index, GUINT_TO_POINTER(conv_index)((gpointer) (gulong) (conv_index)));
3211 | }
3212 | else {
3213 | tsconv = wmem_map_find(conversation_hashtable_exact_addr_port, find_conversation_by_index, GUINT_TO_POINTER(conv_index)((gpointer) (gulong) (conv_index)));
3214 | }
3215 | if(tsconv) {
3216 | conv = tsconv;
3217 | }
3218 | }
3219 | }
3220 | /* else: something is either not implemented or not handled */
3221 |
3222 | DENDENT()(void)0;
3223 |
3224 | return conv;
3225 | }
3226 |
3227 | /* A helper function that calls find_conversation() and, if a conversation is
3228 | * not found, calls conversation_new().
3229 | * The frame number and addresses are taken from pinfo.
3230 | * No options are used, though we could extend this API to include an options
3231 | * parameter.
3232 | */
3233 | conversation_t *
3234 | find_or_create_conversation(const packet_info *pinfo)
3235 | {
3236 | conversation_t *conv=NULL((void*)0);
3237 |
3238 | /* Have we seen this conversation before? */
3239 | if ((conv = find_conversation_pinfo(pinfo, 0)) == NULL((void*)0)) {
3240 | /* No, this is a new conversation. */
3241 | DPRINT(("did not find previous conversation for frame #%u",(void)0
3242 | pinfo->num))(void)0;
3243 | DINDENT()(void)0;
3244 | if (pinfo->use_conv_addr_port_endpoints) {
3245 | conv = conversation_new(pinfo->num, &pinfo->conv_addr_port_endpoints->addr1, &pinfo->conv_addr_port_endpoints->addr2,
3246 | pinfo->conv_addr_port_endpoints->ctype, pinfo->conv_addr_port_endpoints->port1,
3247 | pinfo->conv_addr_port_endpoints->port2, 0);
3248 | } else if (pinfo->conv_elements) {
3249 | conv = conversation_new_full(pinfo->num, pinfo->conv_elements);
3250 | } else {
3251 | conv = conversation_new(pinfo->num, &pinfo->src,
3252 | &pinfo->dst, conversation_pt_to_conversation_type(pinfo->ptype),
3253 | pinfo->srcport, pinfo->destport, 0);
3254 | }
3255 | DENDENT()(void)0;
3256 | }
3257 |
3258 | return conv;
3259 | }
3260 |
3261 | conversation_t *
3262 | find_or_create_conversation_deinterlaced(const packet_info *pinfo, const uint32_t conv_index)
3263 | {
3264 | conversation_t *conv=NULL((void*)0);
3265 |
3266 | /* Have we seen this conversation before? */
3267 | if ((conv = find_conversation_pinfo_deinterlaced(pinfo, conv_index, 0)) == NULL((void*)0)) {
3268 | /* No, this is a new conversation. */
3269 | DPRINT(("did not find previous conversation for frame #%u",(void)0
3270 | pinfo->num))(void)0;
3271 | DINDENT()(void)0;
3272 | if (pinfo->use_conv_addr_port_endpoints) {
3273 | conv = conversation_new_deinterlaced(pinfo->num, &pinfo->conv_addr_port_endpoints->addr1, &pinfo->conv_addr_port_endpoints->addr2,
3274 | pinfo->conv_addr_port_endpoints->ctype, pinfo->conv_addr_port_endpoints->port1,
3275 | pinfo->conv_addr_port_endpoints->port2, conv_index, 0);
3276 | } else if (pinfo->conv_elements) {
3277 | conv = conversation_new_full(pinfo->num, pinfo->conv_elements);
3278 | } else {
3279 | conv = conversation_new_deinterlaced(pinfo->num, &pinfo->src, &pinfo->dst,
3280 | conversation_pt_to_conversation_type(pinfo->ptype),
3281 | pinfo->srcport, pinfo->destport, conv_index, 0);
3282 | }
3283 | DENDENT()(void)0;
3284 | }
3285 |
3286 | return conv;
3287 | }
3288 |
3289 | conversation_t *
3290 | find_or_create_conversation_strat(const packet_info *pinfo)
3291 | {
3292 | conversation_t *conv=NULL((void*)0);
1 | 'conv' initialized to a null pointer value | →
3293 |
3294 | if(is_deinterlacing_supported(pinfo)) {
2 | ← | Taking true branch | →
3295 | conversation_t *underlying_conv = find_conversation_deinterlacer_pinfo(pinfo);
3296 | if(underlying_conv) {
3 | ← | Assuming 'underlying_conv' is null | →
4 | ← | Taking false branch | →
3297 | conv = find_or_create_conversation_deinterlaced(pinfo, underlying_conv->conv_index);
3298 | }
3299 | }
3300 | else {
3301 | conv = find_or_create_conversation(pinfo);
3302 | }
3303 |
3304 | return conv;
5 | ← | Null returned from a function that is expected to return a non-null value
3305 | }
3306 |
3307 | conversation_t *
3308 | find_or_create_conversation_by_id(packet_info *pinfo, const conversation_type ctype, const uint32_t id)
3309 | {
3310 | conversation_t *conv=NULL((void*)0);
3311 |
3312 | /* Have we seen this conversation before? */
3313 | if ((conv = find_conversation_by_id(pinfo->num, ctype, id)) == NULL((void*)0)) {
3314 | /* No, this is a new conversation. */
3315 | DPRINT(("did not find previous conversation for frame #%u",(void)0
3316 | pinfo->num))(void)0;
3317 | DINDENT()(void)0;
3318 | conv = conversation_new_by_id(pinfo->num, ctype, id);
3319 | DENDENT()(void)0;
3320 | }
3321 |
3322 | return conv;
3323 | }
3324 |
3325 | void
3326 | conversation_set_conv_addr_port_endpoints(struct _packet_info *pinfo, address* addr1, address* addr2,
3327 | conversation_type ctype, uint32_t port1, uint32_t port2)
3328 | {
3329 | pinfo->conv_addr_port_endpoints = wmem_new0(pinfo->pool, struct conversation_addr_port_endpoints)((struct conversation_addr_port_endpoints*)wmem_alloc0((pinfo ->pool), sizeof(struct conversation_addr_port_endpoints)));
3330 |
3331 | if (addr1 != NULL((void*)0)) {
3332 | copy_address_wmem(pinfo->pool, &pinfo->conv_addr_port_endpoints->addr1, addr1);
3333 | }
3334 | if (addr2 != NULL((void*)0)) {
3335 | copy_address_wmem(pinfo->pool, &pinfo->conv_addr_port_endpoints->addr2, addr2);
3336 | }
3337 |
3338 | pinfo->conv_addr_port_endpoints->ctype = ctype;
3339 | pinfo->conv_addr_port_endpoints->port1 = port1;
3340 | pinfo->conv_addr_port_endpoints->port2 = port2;
3341 |
3342 | pinfo->use_conv_addr_port_endpoints = true1;
3343 | }
3344 |
3345 | void
3346 | conversation_set_elements_by_id(struct _packet_info *pinfo, conversation_type ctype, uint32_t id)
3347 | {
3348 | pinfo->conv_elements = wmem_alloc0(pinfo->pool, sizeof(conversation_element_t) * 2);
3349 | pinfo->conv_elements[0].type = CE_UINT;
3350 | pinfo->conv_elements[0].uint_val = id;
3351 | pinfo->conv_elements[1].type = CE_CONVERSATION_TYPE;
3352 | pinfo->conv_elements[1].conversation_type_val = ctype;
3353 | }
3354 |
3355 | uint32_t
3356 | conversation_get_id_from_elements(struct _packet_info *pinfo, conversation_type ctype, const unsigned options)
3357 | {
3358 | if (pinfo->conv_elements == NULL((void*)0)) {
3359 | return 0;
3360 | }
3361 |
3362 | if (pinfo->conv_elements[0].type != CE_UINT || pinfo->conv_elements[1].type != CE_CONVERSATION_TYPE) {
3363 | return 0;
3364 | }
3365 |
3366 | if ((pinfo->conv_elements[1].conversation_type_val != ctype) && ((options & USE_LAST_ENDPOINT0x08) != USE_LAST_ENDPOINT0x08)) {
3367 | return 0;
3368 | }
3369 |
3370 | return pinfo->conv_elements[0].uint_val;
3371 | }
3372 |
3373 | wmem_map_t *
3374 | get_conversation_hashtables(void)
3375 | {
3376 | return conversation_hashtable_element_list;
3377 | }
3378 |
3379 | const address*
3380 | conversation_key_addr1(const conversation_element_t *key)
3381 | {
3382 | const address *addr = &null_address_;
3383 | if (key[ADDR1_IDX].type == CE_ADDRESS) {
3384 | addr = &key[ADDR1_IDX].addr_val;
3385 | }
3386 | return addr;
3387 | }
3388 |
3389 | uint32_t
3390 | conversation_key_port1(const conversation_element_t * key)
3391 | {
3392 | uint32_t port = 0;
3393 | if (key[ADDR1_IDX].type == CE_ADDRESS && key[PORT1_IDX].type == CE_PORT) {
3394 | port = key[PORT1_IDX].port_val;
3395 | }
3396 | return port;
3397 | }
3398 |
3399 | const address*
3400 | conversation_key_addr2(const conversation_element_t * key)
3401 | {
3402 | const address *addr = &null_address_;
3403 | if (key[ADDR1_IDX].type == CE_ADDRESS && key[PORT1_IDX].type == CE_PORT && key[ADDR2_IDX].type == CE_ADDRESS) {
3404 | addr = &key[ADDR2_IDX].addr_val;
3405 | }
3406 | return addr;
3407 | }
3408 |
3409 | uint32_t
3410 | conversation_key_port2(const conversation_element_t * key)
3411 | {
3412 | uint32_t port = 0;
3413 | if (key[ADDR1_IDX].type == CE_ADDRESS && key[PORT1_IDX].type == CE_PORT) {
3414 | if (key[ADDR2_IDX].type == CE_ADDRESS && key[PORT2_IDX].type == CE_PORT) {
3415 | // Exact
3416 | port = key[PORT2_IDX].port_val;
3417 | } else if (key[PORT2_NO_ADDR2_IDX].type == CE_PORT) {
3418 | // No addr 2
3419 | port = key[PORT2_NO_ADDR2_IDX].port_val;
3420 | }
3421 | }
3422 | return port;
3423 | }
3424 |
3425 | WS_DLL_PUBLIC__attribute__ ((visibility ("default"))) extern
3426 | conversation_type conversation_pt_to_conversation_type(port_type pt)
3427 | {
3428 | switch (pt)
3429 | {
3430 | case PT_NONE:
3431 | return CONVERSATION_NONE;
3432 | case PT_SCTP:
3433 | return CONVERSATION_SCTP;
3434 | case PT_TCP:
3435 | return CONVERSATION_TCP;
3436 | case PT_UDP:
3437 | return CONVERSATION_UDP;
3438 | case PT_DCCP:
3439 | return CONVERSATION_DCCP;
3440 | case PT_IPX:
3441 | return CONVERSATION_IPX;
3442 | case PT_DDP:
3443 | return CONVERSATION_DDP;
3444 | case PT_IDP:
3445 | return CONVERSATION_IDP;
3446 | case PT_USB:
3447 | return CONVERSATION_USB;
3448 | case PT_I2C:
3449 | /* XXX - this doesn't currently have conversations */
3450 | return CONVERSATION_I2C;
3451 | case PT_IBQP:
3452 | return CONVERSATION_IBQP;
3453 | case PT_BLUETOOTH:
3454 | return CONVERSATION_BLUETOOTH;
3455 | case PT_IWARP_MPA:
3456 | return CONVERSATION_IWARP_MPA;
3457 | case PT_MCTP:
3458 | return CONVERSATION_MCTP;
3459 | }
3460 |
3461 | DISSECTOR_ASSERT(false)((void) ((0) ? (void)0 : (proto_report_dissector_bug("%s:%u: failed assertion \"%s\"" , "epan/conversation.c", 3461, "0"))));
3462 | return CONVERSATION_NONE;
3463 | }
3464 |
3465 | WS_DLL_PUBLIC__attribute__ ((visibility ("default"))) extern
3466 | endpoint_type conversation_pt_to_endpoint_type(port_type pt)
3467 | {
3468 | switch (pt)
3469 | {
3470 | case PT_NONE:
3471 | return ENDPOINT_NONECONVERSATION_NONE;
3472 | case PT_SCTP:
3473 | return ENDPOINT_SCTPCONVERSATION_SCTP;
3474 | case PT_TCP:
3475 | return ENDPOINT_TCPCONVERSATION_TCP;
3476 | case PT_UDP:
3477 | return ENDPOINT_UDPCONVERSATION_UDP;
3478 | case PT_DCCP:
3479 | return ENDPOINT_DCCPCONVERSATION_DCCP;
3480 | case PT_IPX:
3481 | return ENDPOINT_IPXCONVERSATION_IPX;
3482 | case PT_DDP:
3483 | return ENDPOINT_DDPCONVERSATION_DDP;
3484 | case PT_IDP:
3485 | return ENDPOINT_IDPCONVERSATION_IDP;
3486 | case PT_USB:
3487 | return ENDPOINT_USBCONVERSATION_USB;
3488 | case PT_I2C:
3489 | /* XXX - this doesn't have ports */
3490 | return ENDPOINT_I2CCONVERSATION_I2C;
3491 | case PT_IBQP:
3492 | return ENDPOINT_IBQPCONVERSATION_IBQP;
3493 | case PT_BLUETOOTH:
3494 | return ENDPOINT_BLUETOOTHCONVERSATION_BLUETOOTH;
3495 | case PT_IWARP_MPA:
3496 | return ENDPOINT_IWARP_MPACONVERSATION_IWARP_MPA;
3497 | case PT_MCTP:
3498 | return ENDPOINT_MCTPCONVERSATION_MCTP;
3499 | }
3500 |
3501 | DISSECTOR_ASSERT(false)((void) ((0) ? (void)0 : (proto_report_dissector_bug("%s:%u: failed assertion \"%s\"" , "epan/conversation.c", 3501, "0"))));
3502 | return ENDPOINT_NONECONVERSATION_NONE;
3503 | }
3504 |
3505 | /*
3506 | * Editor modelines - https://www.wireshark.org/tools/modelines.html
3507 | *
3508 | * Local variables:
3509 | * c-basic-offset: 4
3510 | * tab-width: 8
3511 | * indent-tabs-mode: nil
3512 | * End:
3513 | *
3514 | * vi: set shiftwidth=4 tabstop=8 expandtab:
3515 | * :indentSize=4:tabSize=8:noTabs=true:
3516 | */