core: removed obsolete DYN_BUF define condition
[sip-router] / src / core / parser / msg_parser.c
1 /*
2  * sip msg. header proxy parser
3  *
4  * Copyright (C) 2001-2003 FhG Fokus
5  *
6  * This file is part of Kamailio, a free SIP server.
7  *
8  * Kamailio is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License as published by
10  * the Free Software Foundation; either version 2 of the License, or
11  * (at your option) any later version
12  *
13  * Kamailio is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16  * GNU General Public License for more details.
17  *
18  * You should have received a copy of the GNU General Public License
19  * along with this program; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
21  *
22  */
23
24 /** Parser :: SIP Message header proxy parser.
25  * @file
26  * @ingroup parser
27  */
28
29 /*! \defgroup parser SIP-router SIP message parser
30  *
31  * The SIP message parser
32  *
33  */
34
35
36 #include <string.h>
37 #include <stdlib.h>
38 #include <sys/time.h>
39
40 #include "../comp_defs.h"
41 #include "msg_parser.h"
42 #include "parser_f.h"
43 #include "../ut.h"
44 #include "../error.h"
45 #include "../dprint.h"
46 #include "../data_lump_rpl.h"
47 #include "../mem/mem.h"
48 #include "../error.h"
49 #include "../core_stats.h"
50 #include "../globals.h"
51 #include "parse_hname2.h"
52 #include "parse_uri.h"
53 #include "parse_content.h"
54 #include "parse_to.h"
55 #include "../compiler_opt.h"
56
57 #ifdef DEBUG_DMALLOC
58 #include <mem/dmalloc.h>
59 #endif
60
61
62 #define parse_hname(_b,_e,_h) parse_hname2((_b),(_e),(_h))
63
64 /* number of via's encountered */
65 int via_cnt;
66 /* global request flags */
67 unsigned int global_req_flags = 0;
68
69 /* returns pointer to next header line, and fill hdr_f ;
70  * if at end of header returns pointer to the last crlf  (always buf)*/
71 char* get_hdr_field(char* const buf, char* const end, struct hdr_field* const hdr)
72 {
73
74         char *tmp = 0;
75         char *match;
76         struct via_body *vb;
77         struct cseq_body* cseq_b;
78         struct to_body* to_b;
79         int integer, err;
80         unsigned uval;
81
82         if(!buf) {
83                 DBG("null buffer pointer\n");
84                 goto error;
85         }
86
87         if ((*buf)=='\n' || (*buf)=='\r'){
88                 /* double crlf or lflf or crcr */
89                 DBG("found end of header\n");
90                 hdr->type=HDR_EOH_T;
91                 return buf;
92         }
93
94         tmp=parse_hname(buf, end, hdr);
95         if (hdr->type==HDR_ERROR_T){
96                 ERR("bad header\n");
97                 goto error;
98         }
99
100         /* eliminate leading whitespace */
101         tmp=eat_lws_end(tmp, end);
102         if (tmp>=end) {
103                 ERR("HF empty\n");
104                 goto error;
105         }
106
107         /* if header-field well-known, parse it, find its end otherwise ;
108          * after leaving the hdr->type switch, tmp should be set to the
109          * next header field
110          */
111         switch(hdr->type){
112                 case HDR_VIA_T:
113                         /* keep number of vias parsed -- we want to report it in
114                            replies for diagnostic purposes */
115                         via_cnt++;
116                         vb=pkg_malloc(sizeof(struct via_body));
117                         if (vb==0){
118                                 PKG_MEM_ERROR;
119                                 goto error;
120                         }
121                         memset(vb,0,sizeof(struct via_body));
122                         hdr->body.s=tmp;
123                         tmp=parse_via(tmp, end, vb);
124                         if (vb->error==PARSE_ERROR){
125                                 ERR("bad via\n");
126                                 free_via_list(vb);
127                                 goto error;
128                         }
129                         hdr->parsed=vb;
130                         vb->hdr.s=hdr->name.s;
131                         vb->hdr.len=hdr->name.len;
132                         hdr->body.len=tmp-hdr->body.s;
133                         break;
134                 case HDR_CSEQ_T:
135                         cseq_b=pkg_malloc(sizeof(struct cseq_body));
136                         if (cseq_b==0){
137                                 PKG_MEM_ERROR;
138                                 goto error;
139                         }
140                         memset(cseq_b, 0, sizeof(struct cseq_body));
141                         hdr->body.s=tmp;
142                         tmp=parse_cseq(tmp, end, cseq_b);
143                         if (cseq_b->error==PARSE_ERROR){
144                                 ERR("bad cseq\n");
145                                 free_cseq(cseq_b);
146                                 goto error;
147                         }
148                         hdr->parsed=cseq_b;
149                         hdr->body.len=tmp-hdr->body.s;
150                         DBG("cseq <%.*s>: <%.*s> <%.*s>\n", hdr->name.len, ZSW(hdr->name.s),
151                                         cseq_b->number.len, ZSW(cseq_b->number.s), cseq_b->method.len,
152                                         cseq_b->method.s);
153                         break;
154                 case HDR_TO_T:
155                         to_b=pkg_malloc(sizeof(struct to_body));
156                         if (to_b==0){
157                                 PKG_MEM_ERROR;
158                                 goto error;
159                         }
160                         memset(to_b, 0, sizeof(struct to_body));
161                         hdr->body.s=tmp;
162                         tmp=parse_to(tmp, end,to_b);
163                         if (to_b->error==PARSE_ERROR){
164                                 ERR("bad to header\n");
165                                 free_to(to_b);
166                                 goto error;
167                         }
168                         hdr->parsed=to_b;
169                         hdr->body.len=tmp-hdr->body.s;
170                         DBG("<%.*s> [%d]; uri=[%.*s]\n", hdr->name.len, ZSW(hdr->name.s),
171                                         hdr->body.len, to_b->uri.len, ZSW(to_b->uri.s));
172                         DBG("to body [%.*s], to tag [%.*s]\n", to_b->body.len,
173                                         ZSW(to_b->body.s), to_b->tag_value.len,
174                                         ZSW(to_b->tag_value.s));
175                         break;
176                 case HDR_CONTENTLENGTH_T:
177                         hdr->body.s=tmp;
178                         tmp=parse_content_length(tmp,end, &integer);
179                         if (tmp==0){
180                                 ERR("bad content_length header\n");
181                                 goto error;
182                         }
183                         hdr->parsed=(void*)(long)integer;
184                         hdr->body.len=tmp-hdr->body.s;
185                         DBG("content_length=%d\n", (int)(long)hdr->parsed);
186                         break;
187                 case HDR_RETRY_AFTER_T:
188                         hdr->body.s=tmp;
189                         tmp=parse_retry_after(tmp,end, &uval, &err);
190                         if (err){
191                                 ERR("bad retry_after header\n");
192                                 goto error;
193                         }
194                         hdr->parsed=(void*)(unsigned long)uval;
195                         hdr->body.len=tmp-hdr->body.s;
196                         DBG("retry_after=%d\n", (unsigned)(long)hdr->parsed);
197                         break;
198                 case HDR_IDENTITY_T:
199                 case HDR_DATE_T:
200                 case HDR_IDENTITY_INFO_T:
201                 case HDR_SUPPORTED_T:
202                 case HDR_REQUIRE_T:
203                 case HDR_CONTENTTYPE_T:
204                 case HDR_FROM_T:
205                 case HDR_CALLID_T:
206                 case HDR_CONTACT_T:
207                 case HDR_ROUTE_T:
208                 case HDR_RECORDROUTE_T:
209                 case HDR_MAXFORWARDS_T:
210                 case HDR_AUTHORIZATION_T:
211                 case HDR_EXPIRES_T:
212                 case HDR_MIN_EXPIRES_T:
213                 case HDR_PROXYAUTH_T:
214                 case HDR_PROXYREQUIRE_T:
215                 case HDR_UNSUPPORTED_T:
216                 case HDR_ALLOW_T:
217                 case HDR_EVENT_T:
218                 case HDR_ACCEPT_T:
219                 case HDR_ACCEPTLANGUAGE_T:
220                 case HDR_ORGANIZATION_T:
221                 case HDR_PRIORITY_T:
222                 case HDR_SUBJECT_T:
223                 case HDR_USERAGENT_T:
224                 case HDR_SERVER_T:
225                 case HDR_CONTENTDISPOSITION_T:
226                 case HDR_DIVERSION_T:
227                 case HDR_RPID_T:
228                 case HDR_SIPIFMATCH_T:
229                 case HDR_REFER_TO_T:
230                 case HDR_SESSIONEXPIRES_T:
231                 case HDR_MIN_SE_T:
232                 case HDR_SUBSCRIPTION_STATE_T:
233                 case HDR_ACCEPTCONTACT_T:
234                 case HDR_ALLOWEVENTS_T:
235                 case HDR_CONTENTENCODING_T:
236                 case HDR_REFERREDBY_T:
237                 case HDR_REJECTCONTACT_T:
238                 case HDR_REQUESTDISPOSITION_T:
239                 case HDR_WWW_AUTHENTICATE_T:
240                 case HDR_PROXY_AUTHENTICATE_T:
241                 case HDR_PATH_T:
242                 case HDR_PRIVACY_T:
243                 case HDR_PAI_T:
244                 case HDR_PPI_T:
245                 case HDR_REASON_T:
246                 case HDR_CALLINFO_T:
247                 case HDR_OTHER_T:
248                         /* just skip over it */
249                         hdr->body.s=tmp;
250                         /* find end of header */
251                         /* find lf */
252                         do{
253                                 match=q_memchr(tmp, '\n', end-tmp);
254                                 if (match){
255                                         match++;
256                                 } else {
257                                         ERR("no eol - bad body for <%.*s> (hdr type: %d) [%.*s]\n",
258                                                          hdr->name.len, hdr->name.s,
259                                                         hdr->type, ((end-tmp)>128)?128:(int)(end-tmp), tmp);
260                                         /* abort(); */
261                                         tmp=end;
262                                         goto error;
263                                 }
264                                 tmp=match;
265                         }while( match<end &&( (*match==' ')||(*match=='\t') ) );
266                         tmp=match;
267                         hdr->body.len=match-hdr->body.s;
268                         break;
269                 default:
270                         BUG("unknown header type %d [%.*s]\n", hdr->type,
271                                          ((end-buf)>128)?128:(int)(end-buf), buf);
272                         goto error;
273         }
274         /* jku: if \r covered by current length, shrink it */
275         trim_r( hdr->body );
276         hdr->len=tmp-hdr->name.s;
277         return tmp;
278 error:
279         DBG("error exit\n");
280         STATS_BAD_MSG_HDR();
281         hdr->type=HDR_ERROR_T;
282         hdr->len=tmp-hdr->name.s;
283         return tmp;
284 }
285
286
287
288 /* parse the headers and adds them to msg->headers and msg->to, from etc.
289  * It stops when all the headers requested in flags were parsed, on error
290  * (bad header) or end of headers
291  * WARNING: parse_headers was changed to use hdr_flags_t (the flags are now
292  *          different from the header types). Don't call it with a header type
293  *          (HDR_xxx_T), only with header flags (HDR_xxx_F)!*/
294 /* note: it continues where it previously stopped and goes ahead until
295    end is encountered or desired HFs are found; if you call it twice
296    for the same HF which is present only once, it will fail the second
297    time; if you call it twice and the HF is found on second time too,
298    it's not replaced in the well-known HF pointer but just added to
299    header list; if you want to use a dumb convenience function which will
300    give you the first occurrence of a header you are interested in,
301    look at check_transaction_quadruple
302 */
303 int parse_headers(struct sip_msg* const msg, const hdr_flags_t flags, const int next)
304 {
305         struct hdr_field* hf;
306         char* tmp;
307         char* rest;
308         char* end;
309         hdr_flags_t orig_flag;
310
311         end=msg->buf+msg->len;
312         tmp=msg->unparsed;
313
314         if (unlikely(next)) {
315                 orig_flag = msg->parsed_flag;
316                 msg->parsed_flag &= ~flags;
317         }else
318                 orig_flag=0;
319
320 #ifdef EXTRA_DEBUG
321         DBG("flags=%llx\n", (unsigned long long)flags);
322 #endif
323         while( tmp<end && (flags & msg->parsed_flag) != flags){
324                 prefetch_loc_r(tmp+64, 1);
325                 hf=pkg_malloc(sizeof(struct hdr_field));
326                 if (unlikely(hf==0)){
327                         PKG_MEM_ERROR;
328                         ser_error=E_OUT_OF_MEM;
329                         goto error;
330                 }
331                 memset(hf,0, sizeof(struct hdr_field));
332                 hf->type=HDR_ERROR_T;
333                 rest=get_hdr_field(tmp, end, hf);
334                 switch (hf->type){
335                         case HDR_ERROR_T:
336                                 ERR("bad header field [%.*s]\n",
337                                                 (end-tmp>100)?100:(int)(end-tmp), tmp);
338                                 goto  error;
339                         case HDR_EOH_T:
340                                 msg->eoh=tmp; /* or rest?*/
341                                 msg->parsed_flag|=HDR_EOH_F;
342                                 pkg_free(hf);
343                                 goto skip;
344                         case HDR_ACCEPTCONTACT_T:
345                         case HDR_ALLOWEVENTS_T:
346                         case HDR_CONTENTENCODING_T:
347                         case HDR_REFERREDBY_T:
348                         case HDR_REJECTCONTACT_T:
349                         case HDR_REQUESTDISPOSITION_T:
350                         case HDR_WWW_AUTHENTICATE_T:
351                         case HDR_PROXY_AUTHENTICATE_T:
352                         case HDR_RETRY_AFTER_T:
353                         case HDR_OTHER_T: /* mark the type as found/parsed*/
354                                 msg->parsed_flag|=HDR_T2F(hf->type);
355                                 break;
356                         case HDR_CALLID_T:
357                                 if (msg->callid==0) msg->callid=hf;
358                                 msg->parsed_flag|=HDR_CALLID_F;
359                                 break;
360                         case HDR_SIPIFMATCH_T:
361                                 if (msg->sipifmatch==0) msg->sipifmatch=hf;
362                                 msg->parsed_flag|=HDR_SIPIFMATCH_F;
363                                 break;
364                         case HDR_TO_T:
365                                 if (msg->to==0) msg->to=hf;
366                                 msg->parsed_flag|=HDR_TO_F;
367                                 break;
368                         case HDR_CSEQ_T:
369                                 if (msg->cseq==0) msg->cseq=hf;
370                                 msg->parsed_flag|=HDR_CSEQ_F;
371                                 break;
372                         case HDR_FROM_T:
373                                 if (msg->from==0) msg->from=hf;
374                                 msg->parsed_flag|=HDR_FROM_F;
375                                 break;
376                         case HDR_CONTACT_T:
377                                 if (msg->contact==0) msg->contact=hf;
378                                 msg->parsed_flag|=HDR_CONTACT_F;
379                                 break;
380                         case HDR_MAXFORWARDS_T:
381                                 if(msg->maxforwards==0) msg->maxforwards=hf;
382                                 msg->parsed_flag|=HDR_MAXFORWARDS_F;
383                                 break;
384                         case HDR_ROUTE_T:
385                                 if (msg->route==0) msg->route=hf;
386                                 msg->parsed_flag|=HDR_ROUTE_F;
387                                 break;
388                         case HDR_RECORDROUTE_T:
389                                 if (msg->record_route==0) msg->record_route = hf;
390                                 msg->parsed_flag|=HDR_RECORDROUTE_F;
391                                 break;
392                         case HDR_CONTENTTYPE_T:
393                                 if (msg->content_type==0) msg->content_type = hf;
394                                 msg->parsed_flag|=HDR_CONTENTTYPE_F;
395                                 break;
396                         case HDR_CONTENTLENGTH_T:
397                                 if (msg->content_length==0) msg->content_length = hf;
398                                 msg->parsed_flag|=HDR_CONTENTLENGTH_F;
399                                 break;
400                         case HDR_AUTHORIZATION_T:
401                                 if (msg->authorization==0) msg->authorization = hf;
402                                 msg->parsed_flag|=HDR_AUTHORIZATION_F;
403                                 break;
404                         case HDR_EXPIRES_T:
405                                 if (msg->expires==0) msg->expires = hf;
406                                 msg->parsed_flag|=HDR_EXPIRES_F;
407                                 break;
408                         case HDR_MIN_EXPIRES_T:
409                                 if (msg->min_expires==0) msg->min_expires = hf;
410                                 msg->parsed_flag|=HDR_MIN_EXPIRES_F;
411                                 break;
412                         case HDR_PROXYAUTH_T:
413                                 if (msg->proxy_auth==0) msg->proxy_auth = hf;
414                                 msg->parsed_flag|=HDR_PROXYAUTH_F;
415                                 break;
416                         case HDR_PROXYREQUIRE_T:
417                                 if (msg->proxy_require==0) msg->proxy_require = hf;
418                                 msg->parsed_flag|=HDR_PROXYREQUIRE_F;
419                                 break;
420                         case HDR_SUPPORTED_T:
421                                 if (msg->supported==0) msg->supported=hf;
422                                 msg->parsed_flag|=HDR_SUPPORTED_F;
423                                 break;
424                         case HDR_REQUIRE_T:
425                                 if (msg->require==0) msg->require=hf;
426                                 msg->parsed_flag|=HDR_REQUIRE_F;
427                                 break;
428                         case HDR_UNSUPPORTED_T:
429                                 if (msg->unsupported==0) msg->unsupported=hf;
430                                 msg->parsed_flag|=HDR_UNSUPPORTED_F;
431                                 break;
432                         case HDR_ALLOW_T:
433                                 if (msg->allow==0) msg->allow = hf;
434                                 msg->parsed_flag|=HDR_ALLOW_F;
435                                 break;
436                         case HDR_EVENT_T:
437                                 if (msg->event==0) msg->event = hf;
438                                 msg->parsed_flag|=HDR_EVENT_F;
439                                 break;
440                         case HDR_ACCEPT_T:
441                                 if (msg->accept==0) msg->accept = hf;
442                                 msg->parsed_flag|=HDR_ACCEPT_F;
443                                 break;
444                         case HDR_ACCEPTLANGUAGE_T:
445                                 if (msg->accept_language==0) msg->accept_language = hf;
446                                 msg->parsed_flag|=HDR_ACCEPTLANGUAGE_F;
447                                 break;
448                         case HDR_ORGANIZATION_T:
449                                 if (msg->organization==0) msg->organization = hf;
450                                 msg->parsed_flag|=HDR_ORGANIZATION_F;
451                                 break;
452                         case HDR_PRIORITY_T:
453                                 if (msg->priority==0) msg->priority = hf;
454                                 msg->parsed_flag|=HDR_PRIORITY_F;
455                                 break;
456                         case HDR_SUBJECT_T:
457                                 if (msg->subject==0) msg->subject = hf;
458                                 msg->parsed_flag|=HDR_SUBJECT_F;
459                                 break;
460                         case HDR_USERAGENT_T:
461                                 if (msg->user_agent==0) msg->user_agent = hf;
462                                 msg->parsed_flag|=HDR_USERAGENT_F;
463                                 break;
464                         case HDR_SERVER_T:
465                                 if (msg->server==0) msg->server = hf;
466                                 msg->parsed_flag|=HDR_SERVER_F;
467                                 break;
468                         case HDR_CONTENTDISPOSITION_T:
469                                 if (msg->content_disposition==0) msg->content_disposition = hf;
470                                 msg->parsed_flag|=HDR_CONTENTDISPOSITION_F;
471                                 break;
472                         case HDR_DIVERSION_T:
473                                 if (msg->diversion==0) msg->diversion = hf;
474                                 msg->parsed_flag|=HDR_DIVERSION_F;
475                                 break;
476                         case HDR_RPID_T:
477                                 if (msg->rpid==0) msg->rpid = hf;
478                                 msg->parsed_flag|=HDR_RPID_F;
479                                 break;
480                         case HDR_REFER_TO_T:
481                                 if (msg->refer_to==0) msg->refer_to = hf;
482                                 msg->parsed_flag|=HDR_REFER_TO_F;
483                                 break;
484                         case HDR_SESSIONEXPIRES_T:
485                                 if (msg->session_expires==0) msg->session_expires = hf;
486                                 msg->parsed_flag|=HDR_SESSIONEXPIRES_F;
487                                 break;
488                         case HDR_MIN_SE_T:
489                                 if (msg->min_se==0) msg->min_se = hf;
490                                 msg->parsed_flag|=HDR_MIN_SE_F;
491                                 break;
492                         case HDR_SUBSCRIPTION_STATE_T:
493                                 if (msg->subscription_state==0) msg->subscription_state = hf;
494                                 msg->parsed_flag|=HDR_SUBSCRIPTION_STATE_F;
495                                 break;
496                         case HDR_VIA_T:
497                                 msg->parsed_flag|=HDR_VIA_F;
498                                 DBG("Via found, flags=%llx\n", (unsigned long long)flags);
499                                 if (msg->via1==0) {
500                                         DBG("this is the first via\n");
501                                         msg->h_via1=hf;
502                                         msg->via1=hf->parsed;
503                                         if (msg->via1->next){
504                                                 msg->via2=msg->via1->next;
505                                                 msg->parsed_flag|=HDR_VIA2_F;
506                                         }
507                                 }else if (msg->via2==0){
508                                         msg->h_via2=hf;
509                                         msg->via2=hf->parsed;
510                                         msg->parsed_flag|=HDR_VIA2_F;
511                                         DBG("this is the second via\n");
512                                 }
513                                 break;
514                         case HDR_DATE_T:
515                                 if (msg->date==0) msg->date=hf;
516                                 msg->parsed_flag|=HDR_DATE_F;
517                                 break;
518                         case HDR_IDENTITY_T:
519                                 if (msg->identity==0) msg->identity=hf;
520                                 msg->parsed_flag|=HDR_IDENTITY_F;
521                                 break;
522                         case HDR_IDENTITY_INFO_T:
523                                 if (msg->identity_info==0) msg->identity_info=hf;
524                                 msg->parsed_flag|=HDR_IDENTITY_INFO_F;
525                                 break;
526                     case HDR_PATH_T:
527                                 if (msg->path==0) msg->path=hf;
528                                 msg->parsed_flag|=HDR_PATH_F;
529                                 break;
530                     case HDR_PRIVACY_T:
531                                 if (msg->privacy==0) msg->privacy=hf;
532                                 msg->parsed_flag|=HDR_PRIVACY_F;
533                                 break;
534                     case HDR_PAI_T:
535                                 if (msg->pai==0) msg->pai=hf;
536                                 msg->parsed_flag|=HDR_PAI_F;
537                                 break;
538                     case HDR_PPI_T:
539                                 if (msg->ppi==0) msg->ppi=hf;
540                                 msg->parsed_flag|=HDR_PPI_F;
541                                 break;
542                     case HDR_REASON_T:
543                                 msg->parsed_flag|=HDR_REASON_F;
544                                 break;
545                         case HDR_CALLINFO_T:
546                                 msg->parsed_flag|=HDR_CALLINFO_F;
547                                 break;
548                         default:
549                                 BUG("unknown header type %d\n", hf->type);
550                                 goto error;
551                 }
552                 /* add the header to the list*/
553                 if (msg->last_header==0){
554                         msg->headers=hf;
555                         msg->last_header=hf;
556                 }else{
557                         msg->last_header->next=hf;
558                         msg->last_header=hf;
559                 }
560 #ifdef EXTRA_DEBUG
561                 DBG("header field type %d, name=<%.*s>, body=<%.*s>\n", hf->type,
562                                 hf->name.len, ZSW(hf->name.s), hf->body.len, ZSW(hf->body.s));
563 #endif
564                 tmp=rest;
565         }
566 skip:
567         msg->unparsed=tmp;
568         /* restore original flags */
569         msg->parsed_flag |= orig_flag;
570         return 0;
571
572 error:
573         ser_error=E_BAD_REQ;
574         if (hf) pkg_free(hf);
575         /* restore original flags */
576         msg->parsed_flag |= orig_flag;
577         return -1;
578 }
579
580
581
582
583
584 /* returns 0 if ok, -1 for errors */
585 int parse_msg(char* const buf, const unsigned int len, struct sip_msg* const msg)
586 {
587
588         char *tmp;
589         char* rest;
590         struct msg_start *fl;
591         int offset;
592         hdr_flags_t flags;
593
594         /* eat crlf & whitespaces from the beginning */
595         for (tmp=buf; (tmp-buf < len)
596                         && (*tmp=='\n' || *tmp=='\r' || *tmp=='\0'
597                                 || *tmp=='\t' || *tmp==' ');
598                         tmp++);
599         offset=tmp-buf;
600         fl=&(msg->first_line);
601         rest=parse_first_line(tmp, len-offset, fl);
602         offset+=rest-tmp;
603         tmp=rest;
604         switch(fl->type){
605                 case SIP_INVALID:
606                         DBG("invalid message\n");
607                         goto error;
608                         break;
609                 case SIP_REQUEST:
610                         DBG("SIP Request:\n");
611                         DBG(" method:  <%.*s>\n", fl->u.request.method.len,
612                                         ZSW(fl->u.request.method.s));
613                         DBG(" uri:     <%.*s>\n", fl->u.request.uri.len,
614                                         ZSW(fl->u.request.uri.s));
615                         DBG(" version: <%.*s>\n", fl->u.request.version.len,
616                                         ZSW(fl->u.request.version.s));
617                         flags=HDR_VIA_F;
618                         break;
619                 case SIP_REPLY:
620                         DBG("SIP Reply  (status):\n");
621                         DBG(" version: <%.*s>\n", fl->u.reply.version.len,
622                                         ZSW(fl->u.reply.version.s));
623                         DBG(" status:  <%.*s>\n", fl->u.reply.status.len,
624                                         ZSW(fl->u.reply.status.s));
625                         DBG(" reason:  <%.*s>\n", fl->u.reply.reason.len,
626                                         ZSW(fl->u.reply.reason.s));
627                         /* flags=HDR_VIA | HDR_VIA2; */
628                         /* we don't try to parse VIA2 for local messages; -Jiri */
629                         flags=HDR_VIA_F;
630                         break;
631                 default:
632                         DBG("unknown type %d\n", fl->type);
633                         goto error;
634         }
635         msg->unparsed=tmp;
636         /*find first Via: */
637         if (parse_headers(msg, flags, 0)==-1) goto error;
638
639 #ifdef EXTRA_DEBUG
640         /* dump parsed data */
641         if (msg->via1){
642                 DBG("first via: <%.*s/%.*s/%.*s> <%.*s:%.*s(%d)>",
643                                 msg->via1->name.len, ZSW(msg->via1->name.s),
644                                 msg->via1->version.len, ZSW(msg->via1->version.s),
645                                 msg->via1->transport.len, ZSW(msg->via1->transport.s),
646                                 msg->via1->host.len, ZSW(msg->via1->host.s),
647                                 msg->via1->port_str.len, ZSW(msg->via1->port_str.s),
648                                 msg->via1->port);
649                 if (msg->via1->params.s)
650                         DBG(";<%.*s>", msg->via1->params.len, ZSW(msg->via1->params.s));
651                 if (msg->via1->comment.s)
652                         DBG(" <%.*s>", msg->via1->comment.len, ZSW(msg->via1->comment.s));
653                 DBG ("\n");
654         }
655         if (msg->via2){
656                 DBG("second via: <%.*s/%.*s/%.*s> <%.*s:%.*s(%d)>",
657                                 msg->via2->name.len, ZSW(msg->via2->name.s),
658                                 msg->via2->version.len, ZSW(msg->via2->version.s),
659                                 msg->via2->transport.len, ZSW(msg->via2->transport.s),
660                                 msg->via2->host.len, ZSW(msg->via2->host.s),
661                                 msg->via2->port_str.len, ZSW(msg->via2->port_str.s),
662                                 msg->via2->port);
663                 if (msg->via2->params.s)
664                         DBG(";<%.*s>", msg->via2->params.len, ZSW(msg->via2->params.s));
665                 if (msg->via2->comment.s)
666                         DBG(" <%.*s>", msg->via2->comment.len, ZSW(msg->via2->comment.s));
667                 DBG ("\n");
668         }
669 #endif
670
671
672 #ifdef EXTRA_DEBUG
673         DBG("exiting parse_msg\n");
674 #endif
675
676         return 0;
677
678 error:
679         /* more debugging, msg->orig is/should be null terminated*/
680         LOG(cfg_get(core, core_cfg, corelog), "ERROR: parse_msg: message=<%.*s>\n",
681                         (int)msg->len, ZSW(msg->buf));
682         return -1;
683 }
684
685
686
687 void free_reply_lump( struct lump_rpl *lump)
688 {
689         struct lump_rpl *foo, *bar;
690         for(foo=lump;foo;)
691         {
692                 bar=foo->next;
693                 free_lump_rpl(foo);
694                 foo = bar;
695         }
696 }
697
698
699 /*only the content*/
700 void free_sip_msg(struct sip_msg* const msg)
701 {
702         reset_new_uri(msg);
703         reset_dst_uri(msg);
704         reset_path_vector(msg);
705         reset_instance(msg);
706         reset_ruid(msg);
707         reset_ua(msg);
708         if (msg->headers)     free_hdr_field_lst(msg->headers);
709         if (msg->body && msg->body->free) msg->body->free(&msg->body);
710         if (msg->add_rm)      free_lump_list(msg->add_rm);
711         if (msg->body_lumps)  free_lump_list(msg->body_lumps);
712         if (msg->reply_lump)   free_reply_lump(msg->reply_lump);
713         msg_ldata_reset(msg);
714         /* no free of msg->buf -- a pointer to a static buffer */
715 }
716
717 /**
718  * reset new uri value
719  */
720 void reset_new_uri(struct sip_msg* const msg)
721 {
722         if(msg->new_uri.s != 0) {
723                 pkg_free(msg->new_uri.s);
724         }
725         msg->new_uri.s = 0;
726         msg->new_uri.len = 0;
727         msg->parsed_uri_ok = 0;
728 }
729
730
731 /*
732  * Make a private copy of the string and assign it to dst_uri
733  */
734 int set_dst_uri(struct sip_msg* const msg, const str* const uri)
735 {
736         char* ptr;
737
738         if (unlikely(!msg || !uri)) {
739                 ERR("Invalid parameter value\n");
740                 return -1;
741         }
742
743         if (unlikely(uri->len == 0)) {
744                 reset_dst_uri(msg);
745         }else if (msg->dst_uri.s && (msg->dst_uri.len >= uri->len)) {
746                 memcpy(msg->dst_uri.s, uri->s, uri->len);
747                 msg->dst_uri.len = uri->len;
748         } else {
749                 ptr = (char*)pkg_malloc(uri->len + 1);
750                 if (!ptr) {
751                         PKG_MEM_ERROR;
752                         return -1;
753                 }
754
755                 memcpy(ptr, uri->s, uri->len);
756                 if (msg->dst_uri.s) pkg_free(msg->dst_uri.s);
757                 msg->dst_uri.s = ptr;
758                 msg->dst_uri.len = uri->len;
759                 msg->dst_uri.s[msg->dst_uri.len] = '\0';
760         }
761         return 0;
762 }
763
764
765 void reset_dst_uri(struct sip_msg* const msg)
766 {
767         if(msg->dst_uri.s != 0) {
768                 pkg_free(msg->dst_uri.s);
769         }
770         msg->dst_uri.s = 0;
771         msg->dst_uri.len = 0;
772 }
773
774 int set_path_vector(struct sip_msg* msg, str* path)
775 {
776         char* ptr;
777
778         if (unlikely(!msg || !path)) {
779                 ERR("invalid parameter value\n");
780                 return -1;
781         }
782
783         if (unlikely(path->len == 0)) {
784                 reset_path_vector(msg);
785         } else if (msg->path_vec.s && (msg->path_vec.len >= path->len)) {
786                 memcpy(msg->path_vec.s, path->s, path->len);
787                 msg->path_vec.len = path->len;
788         } else {
789                 ptr = (char*)pkg_malloc(path->len);
790                 if (!ptr) {
791                         PKG_MEM_ERROR;
792                         return -1;
793                 }
794
795                 memcpy(ptr, path->s, path->len);
796                 if (msg->path_vec.s) pkg_free(msg->path_vec.s);
797                 msg->path_vec.s = ptr;
798                 msg->path_vec.len = path->len;
799         }
800         return 0;
801 }
802
803
804 void reset_path_vector(struct sip_msg* const msg)
805 {
806         if (!shm_address_in(msg->path_vec.s)) {
807                 if (msg->path_vec.s)
808                         pkg_free(msg->path_vec.s);
809                 msg->path_vec.s = 0;
810                 msg->path_vec.len = 0;
811         } else {
812                 LM_WARN("Found path_vec that is not in pkg mem!\n");
813         }
814 }
815
816
817 int set_instance(struct sip_msg* msg, str* instance)
818 {
819         char* ptr;
820
821         if (unlikely(!msg || !instance)) {
822                 ERR("invalid instance parameter value\n");
823                 return -1;
824         }
825
826         if (unlikely(instance->len == 0)) {
827                 reset_instance(msg);
828         } else if (msg->instance.s && (msg->instance.len >= instance->len)) {
829                 memcpy(msg->instance.s, instance->s, instance->len);
830                 msg->instance.len = instance->len;
831         } else {
832                 ptr = (char*)pkg_malloc(instance->len);
833                 if (!ptr) {
834                         PKG_MEM_ERROR;
835                         return -1;
836                 }
837                 memcpy(ptr, instance->s, instance->len);
838                 if (msg->instance.s) pkg_free(msg->instance.s);
839                 msg->instance.s = ptr;
840                 msg->instance.len = instance->len;
841         }
842         return 0;
843 }
844
845
846 void reset_instance(struct sip_msg* const msg)
847 {
848         if(msg->instance.s != 0) {
849                 pkg_free(msg->instance.s);
850         }
851         msg->instance.s = 0;
852         msg->instance.len = 0;
853 }
854
855
856 int set_ruid(struct sip_msg* msg, str* ruid)
857 {
858         char* ptr;
859
860         if (unlikely(!msg || !ruid)) {
861                 ERR("invalid ruid parameter value\n");
862                 return -1;
863         }
864
865         if (unlikely(ruid->len == 0)) {
866                 reset_ruid(msg);
867         } else if (msg->ruid.s && (msg->ruid.len >= ruid->len)) {
868                 memcpy(msg->ruid.s, ruid->s, ruid->len);
869                 msg->ruid.len = ruid->len;
870         } else {
871                 ptr = (char*)pkg_malloc(ruid->len);
872                 if (!ptr) {
873                         PKG_MEM_ERROR;
874                         return -1;
875                 }
876                 memcpy(ptr, ruid->s, ruid->len);
877                 if (msg->ruid.s) pkg_free(msg->ruid.s);
878                 msg->ruid.s = ptr;
879                 msg->ruid.len = ruid->len;
880         }
881         return 0;
882 }
883
884
885 void reset_ruid(struct sip_msg* const msg)
886 {
887         if(msg->ruid.s != 0) {
888                 pkg_free(msg->ruid.s);
889         }
890         msg->ruid.s = 0;
891         msg->ruid.len = 0;
892 }
893
894
895 int set_ua(struct sip_msg* msg, str* location_ua)
896 {
897         char* ptr;
898
899         if (unlikely(!msg || !location_ua)) {
900                 ERR("invalid location_ua parameter value\n");
901                 return -1;
902         }
903
904         if (unlikely(location_ua->len == 0)) {
905                 reset_ua(msg);
906         } else if (msg->location_ua.s && (msg->location_ua.len >= location_ua->len)) {
907                 memcpy(msg->location_ua.s, location_ua->s, location_ua->len);
908                 msg->location_ua.len = location_ua->len;
909         } else {
910                 ptr = (char*)pkg_malloc(location_ua->len);
911                 if (!ptr) {
912                         PKG_MEM_ERROR;
913                         return -1;
914                 }
915                 memcpy(ptr, location_ua->s, location_ua->len);
916                 if (msg->location_ua.s) pkg_free(msg->location_ua.s);
917                 msg->location_ua.s = ptr;
918                 msg->location_ua.len = location_ua->len;
919         }
920         return 0;
921 }
922
923
924 void reset_ua(struct sip_msg* const msg)
925 {
926         if(msg->location_ua.s != 0) {
927                 pkg_free(msg->location_ua.s);
928         }
929         msg->location_ua.s = 0;
930         msg->location_ua.len = 0;
931 }
932
933 /**
934  * reset content of msg->ldv (msg_ldata_t structure)
935  */
936 void msg_ldata_reset(sip_msg_t *msg)
937 {
938         if(msg==NULL)
939                 return;
940         memset(&msg->ldv, 0, sizeof(msg_ldata_t));
941 }
942
943
944 hdr_field_t* get_hdr(const sip_msg_t* const msg, const enum _hdr_types_t ht)
945 {
946         hdr_field_t *hdr;
947
948         if (msg->parsed_flag & HDR_T2F(ht))
949                 for(hdr = msg->headers; hdr; hdr = hdr->next) {
950                         if(hdr->type == ht) return hdr;
951                 }
952         return NULL;
953 }
954
955
956 hdr_field_t* next_sibling_hdr(const hdr_field_t* const hf)
957 {
958         hdr_field_t *hdr;
959
960         for(hdr = hf->next; hdr; hdr = hdr->next) {
961                 if(hdr->type == hf->type) return hdr;
962         }
963         return NULL;
964 }
965
966 hdr_field_t* get_hdr_by_name(const sip_msg_t* const msg, const char* const name, const int name_len)
967 {
968         hdr_field_t *hdr;
969
970         for(hdr = msg->headers; hdr; hdr = hdr->next) {
971                 if(hdr->name.len == name_len && *hdr->name.s==*name
972                                 && strncasecmp(hdr->name.s, name, name_len)==0)
973                         return hdr;
974         }
975         return NULL;
976 }
977
978 /** not used yet */
979 hdr_field_t* next_sibling_hdr_by_name(const hdr_field_t* const hf)
980 {
981         hdr_field_t *hdr;
982
983         for(hdr = hf->next; hdr; hdr = hdr->next) {
984                 if(hdr->name.len == hf->name.len && *hdr->name.s==*hf->name.s
985                                 && strncasecmp(hdr->name.s, hf->name.s, hf->name.len)==0)
986                         return hdr;
987         }
988         return NULL;
989 }
990
991 /**
992  * set msg context id
993  * - return: -1 on error; 0 - on set
994  */
995 int msg_ctx_id_set(const sip_msg_t* const msg, msg_ctx_id_t* const mid)
996 {
997         if(msg==NULL || mid==NULL)
998                 return -1;
999         mid->msgid = msg->id;
1000         mid->pid = msg->pid;
1001         return 0;
1002 }
1003
1004 /**
1005  * check msg context id
1006  * - return: -1 on error; 0 - on no match; 1 - on match
1007  */
1008 int msg_ctx_id_match(const sip_msg_t* const msg, const msg_ctx_id_t* const mid)
1009 {
1010         if(msg==NULL || mid==NULL)
1011                 return -1;
1012         if(msg->id != mid->msgid || msg->pid!=mid->pid)
1013                 return 0;
1014         return 1;
1015 }
1016
1017 /**
1018  * set msg time value
1019  */
1020 int msg_set_time(sip_msg_t* const msg)
1021 {
1022         if(unlikely(msg==NULL))
1023                 return -2;
1024         if(msg->tval.tv_sec!=0)
1025                 return 0;
1026         return gettimeofday(&msg->tval, NULL);
1027 }
1028
1029 /**
1030  * get source ip, port and protocol in SIP URI format
1031  * - tmode - 0: short format (transport=udp is not added, being default)
1032  */
1033 int get_src_uri(sip_msg_t *m, int tmode, str *uri)
1034 {
1035         static char buf[MAX_URI_SIZE];
1036         char* p;
1037         str ip, port;
1038         int len;
1039         str proto;
1040
1041         if (!uri || !m) {
1042                 ERR("invalid parameter value\n");
1043                 return -1;
1044         }
1045
1046         if(tmode==0) {
1047                 switch(m->rcv.proto) {
1048                         case PROTO_NONE:
1049                         case PROTO_UDP:
1050                                 proto.s = 0; /* Do not add transport parameter, UDP is default */
1051                                 proto.len = 0;
1052                         break;
1053                         default:
1054                                 if(get_valid_proto_string(m->rcv.proto, 1, 0, &proto)<0) {
1055                                         ERR("unknown transport protocol\n");
1056                                         return -1;
1057                                 }
1058                 }
1059         } else {
1060                 if(get_valid_proto_string(m->rcv.proto, 1, 0, &proto)<0) {
1061                         ERR("unknown transport protocol\n");
1062                         return -1;
1063                 }
1064         }
1065
1066         ip.s = ip_addr2a(&m->rcv.src_ip);
1067         ip.len = strlen(ip.s);
1068
1069         port.s = int2str(m->rcv.src_port, &port.len);
1070
1071         len = 4 + ip.len + 2*(m->rcv.src_ip.af==AF_INET6)+ 1 + port.len;
1072         if (proto.s) {
1073                 len += TRANSPORT_PARAM_LEN;
1074                 len += proto.len;
1075         }
1076
1077         if (len > MAX_URI_SIZE) {
1078                 ERR("buffer too small\n");
1079                 return -1;
1080         }
1081
1082         p = buf;
1083         memcpy(p, "sip:", 4);
1084         p += 4;
1085
1086         if (m->rcv.src_ip.af==AF_INET6)
1087                 *p++ = '[';
1088         memcpy(p, ip.s, ip.len);
1089         p += ip.len;
1090         if (m->rcv.src_ip.af==AF_INET6)
1091                 *p++ = ']';
1092
1093         *p++ = ':';
1094
1095         memcpy(p, port.s, port.len);
1096         p += port.len;
1097
1098         if (proto.s) {
1099                 memcpy(p, TRANSPORT_PARAM, TRANSPORT_PARAM_LEN);
1100                 p += TRANSPORT_PARAM_LEN;
1101
1102                 memcpy(p, proto.s, proto.len);
1103                 p += proto.len;
1104         }
1105
1106         uri->s = buf;
1107         uri->len = len;
1108
1109         return 0;
1110 }
1111
1112 /**
1113  * get source proto:ip:port (socket address format)
1114  */
1115 int get_src_address_socket(sip_msg_t *m, str *ssock)
1116 {
1117         static char buf[MAX_URI_SIZE];
1118         char* p;
1119         str ip, port;
1120         int len;
1121         str proto;
1122
1123         if (!ssock || !m) {
1124                 ERR("invalid parameter value\n");
1125                 return -1;
1126         }
1127
1128         if(get_valid_proto_string(m->rcv.proto, 1, 0, &proto)<0) {
1129                 ERR("unknown transport protocol\n");
1130                 return -1;
1131         }
1132
1133         ip.s = ip_addr2a(&m->rcv.src_ip);
1134         ip.len = strlen(ip.s);
1135
1136         port.s = int2str(m->rcv.src_port, &port.len);
1137
1138         len = proto.len + 1 + ip.len + 2*(m->rcv.src_ip.af==AF_INET6)+ 1 + port.len;
1139
1140         if (len+1 >= MAX_URI_SIZE) {
1141                 ERR("buffer too small\n");
1142                 return -1;
1143         }
1144
1145         p = buf;
1146
1147         memcpy(p, proto.s, proto.len);
1148         p += proto.len;
1149
1150         *p++ = ':';
1151
1152         if (m->rcv.src_ip.af==AF_INET6)
1153                 *p++ = '[';
1154         memcpy(p, ip.s, ip.len);
1155         p += ip.len;
1156         if (m->rcv.src_ip.af==AF_INET6)
1157                 *p++ = ']';
1158
1159         *p++ = ':';
1160
1161         memcpy(p, port.s, port.len);
1162         p += port.len;
1163         *p = '\0';
1164
1165         ssock->s = buf;
1166         ssock->len = len;
1167
1168         return 0;
1169 }
1170
1171 /**
1172  * get received-on-socket ip, port and protocol in SIP URI format
1173  * - tmode - 0: short format (transport=udp is not added, being default)
1174  * - atype - 0: listen address; 1: advertised address
1175  */
1176 int get_rcv_socket_uri(sip_msg_t *m, int tmode, str *uri, int atype)
1177 {
1178         static char buf[MAX_URI_SIZE];
1179         char* p;
1180         str ip, port;
1181         int len;
1182         str proto;
1183
1184         if (!uri || !m || !m->rcv.bind_address) {
1185                 ERR("invalid parameter value\n");
1186                 return -1;
1187         }
1188
1189         if(tmode==0) {
1190                 switch(m->rcv.proto) {
1191                         case PROTO_NONE:
1192                         case PROTO_UDP:
1193                                 proto.s = 0; /* Do not add transport parameter, UDP is default */
1194                                 proto.len = 0;
1195                         break;
1196                         default:
1197                                 if(get_valid_proto_string(m->rcv.proto, 1, 0, &proto)<0) {
1198                                         ERR("unknown transport protocol\n");
1199                                         return -1;
1200                                 }
1201                 }
1202         } else {
1203                 if(get_valid_proto_string(m->rcv.proto, 1, 0, &proto)<0) {
1204                         ERR("unknown transport protocol\n");
1205                         return -1;
1206                 }
1207         }
1208
1209         if(atype==0 || m->rcv.bind_address->useinfo.address_str.len<=0) {
1210                 ip.s = m->rcv.bind_address->address_str.s;
1211                 ip.len = m->rcv.bind_address->address_str.len;
1212         } else {
1213                 ip.s = m->rcv.bind_address->useinfo.address_str.s;
1214                 ip.len = m->rcv.bind_address->useinfo.address_str.len;
1215         }
1216
1217         if(atype==0|| m->rcv.bind_address->useinfo.port_no_str.len <= 0) {
1218                 port.s = m->rcv.bind_address->port_no_str.s;
1219                 port.len = m->rcv.bind_address->port_no_str.len;
1220         } else {
1221                 port.s = m->rcv.bind_address->useinfo.port_no_str.s;
1222                 port.len = m->rcv.bind_address->useinfo.port_no_str.len;
1223         }
1224
1225         len = 4 + ip.len + 2*(m->rcv.src_ip.af==AF_INET6)+ 1 + port.len;
1226         if (proto.s) {
1227                 len += TRANSPORT_PARAM_LEN;
1228                 len += proto.len;
1229         }
1230
1231         if (len > MAX_URI_SIZE) {
1232                 ERR("buffer too small\n");
1233                 return -1;
1234         }
1235
1236         p = buf;
1237         memcpy(p, "sip:", 4);
1238         p += 4;
1239
1240         if (m->rcv.src_ip.af==AF_INET6)
1241                 *p++ = '[';
1242         memcpy(p, ip.s, ip.len);
1243         p += ip.len;
1244         if (m->rcv.src_ip.af==AF_INET6)
1245                 *p++ = ']';
1246
1247         *p++ = ':';
1248
1249         memcpy(p, port.s, port.len);
1250         p += port.len;
1251
1252         if (proto.s) {
1253                 memcpy(p, TRANSPORT_PARAM, TRANSPORT_PARAM_LEN);
1254                 p += TRANSPORT_PARAM_LEN;
1255
1256                 memcpy(p, proto.s, proto.len);
1257                 p += proto.len;
1258         }
1259
1260         uri->s = buf;
1261         uri->len = len;
1262
1263         return 0;
1264 }
1265
1266
1267 /*! \brief returns a pointer to the begining of the msg's body
1268  */
1269 char* get_body(sip_msg_t* const msg)
1270 {
1271         int offset;
1272         unsigned int len;
1273
1274         if ( parse_headers(msg, HDR_EOH_F, 0)==-1 ) {
1275                 LM_ERR("failed to parse to end of headers\n");
1276                 return 0;
1277         }
1278
1279         if (msg->unparsed) {
1280                 len=(unsigned int)(msg->unparsed-msg->buf);
1281         } else {
1282                 LM_ERR("unparsed hook for end of headers is not set\n");
1283                 return 0;
1284         }
1285
1286         if ((len+2<=msg->len) && (strncmp(CRLF,msg->unparsed,CRLF_LEN)==0) ) {
1287                 offset = CRLF_LEN;
1288         } else if ( (len+1<=msg->len) &&
1289                                 (*(msg->unparsed)=='\n' || *(msg->unparsed)=='\r' ) ) {
1290                 offset = 1;
1291         } else {
1292                 LM_ERR("failed to locate end of headers (%p %p - %d %d [%s])\n",
1293                                 msg->buf, msg->unparsed, msg->len, len, msg->unparsed);
1294                 return 0;
1295         }
1296
1297         return msg->unparsed + offset;
1298 }
1299
1300 /*! \brief make sure all HFs needed for transaction identification have been
1301  * parsed; return 0 if those HFs can't be found
1302 */
1303 int check_transaction_quadruple(sip_msg_t* const msg)
1304 {
1305         if ( parse_headers(msg, HDR_FROM_F|HDR_TO_F|HDR_CALLID_F|HDR_CSEQ_F,0)!=-1
1306                 && msg->from && msg->to && msg->callid && msg->cseq ) {
1307                 return 1;
1308         } else {
1309                 ser_error=E_BAD_TUPEL;
1310                 return 0;
1311         }
1312 }