git.sip-router.org Git - kamailio/blob - src/modules/tm/t_fifo.c

   1 /*
   2  * tm - transaction management module
   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
  25 #include <sys/types.h>
  26 #include <sys/stat.h>
  27 #include <fcntl.h>
  28 #include <errno.h>
  29 #include <string.h>
  30 #include <sys/uio.h>
  31 #include <unistd.h>
  32 #include <fcntl.h>
  33 #include <sys/un.h>
  34 #include <ctype.h>
  35 #include <string.h>
  36
  37 #include "../../core/str.h"
  38 #include "../../core/ut.h"
  39 #include "../../core/dprint.h"
  40 #include "../../core/mem/mem.h"
  41 #include "../../core/usr_avp.h"
  42 #include "../../core/parser/parser_f.h"
  43 #include "../../core/parser/parse_from.h"
  44 #include "../../core/parser/parse_rr.h"
  45 #include "../../core/parser/parse_nameaddr.h"
  46 #include "../../core/parser/parse_hname2.h"
  47 #include "../../core/parser/contact/parse_contact.h"
  48 #include "../../core/tsend.h"
  49 #include "config.h"
  50 #include "t_lookup.h"
  51 #include "t_fwd.h"
  52 #include "t_funcs.h"
  53 #include "t_fifo.h"
  54
  55
  56 /* AF_LOCAL is not defined on solaris */
  57 #if !defined(AF_LOCAL)
  58 #define AF_LOCAL AF_UNIX
  59 #endif
  60 #if !defined(PF_LOCAL)
  61 #define PF_LOCAL PF_UNIX
  62 #endif
  63
  64
  65 /* solaris doesn't have SUN_LEN */
  66 #ifndef SUN_LEN
  67 #define SUN_LEN(sa)      ( strlen((sa)->sun_path) + \
  68                                                 (size_t)(((struct sockaddr_un*)0)->sun_path) )
  69 #endif
  70
  71
  72 #define TWRITE_PARAMS          20
  73 #define TWRITE_VERSION_S       "0.3"
  74 #define TWRITE_VERSION_LEN     (sizeof(TWRITE_VERSION_S)-1)
  75
  76 #define eol_line_s(_i_)        ( iov_lines_eol[2*(_i_)].iov_base )
  77 #define eol_line_len(_i_)      ( iov_lines_eol[2*(_i_)].iov_len )
  78
  79 #define eol_line(_i_,_s_)      { eol_line_s(_i_) = (_s_).s; \
  80                                                                         eol_line_len(_i_) = (_s_).len; }
  81
  82 #define IDBUF_LEN              128
  83 #define ROUTE_BUFFER_MAX       512
  84 #define APPEND_BUFFER_MAX      4096
  85 #define CMD_BUFFER_MAX         128
  86
  87 #define copy_route(s,len,rs,rlen) \
  88         do {\
  89                 if(rlen+len+3 >= ROUTE_BUFFER_MAX){\
  90                         LM_ERR("buffer overflow while copying new route\n");\
  91                         goto error;\
  92                 }\
  93                 if(len){\
  94                         append_chr(s,','); len++;\
  95                 }\
  96                 append_chr(s,'<');len++;\
  97                 append_str(s,rs,rlen);\
  98                 len += rlen; \
  99                 append_chr(s,'>');len++;\
 100         } while(0)
 101
 102 static struct iovec iov_lines_eol[2*TWRITE_PARAMS];
 103 static struct iovec eol={"\n",1};
 104
 105 static int sock;
 106
 107 struct hdr_avp {
 108         str title;
 109         int type;
 110         str sval;
 111         int ival;
 112         struct hdr_avp *next;
 113 };
 114
 115 struct tw_append {
 116         str name;
 117         int add_body;
 118         struct hdr_avp *elems;
 119         struct tw_append *next;
 120 };
 121
 122 struct tw_info {
 123         str action;
 124         struct tw_append *append;
 125 };
 126
 127 #define ELEM_TYPE_AVP      "avp"
 128 #define ELEM_TYPE_AVP_LEN  (sizeof(ELEM_TYPE_AVP)-1)
 129 #define ELEM_TYPE_HDR      "hdr"
 130 #define ELEM_TYPE_HDR_LEN  (sizeof(ELEM_TYPE_HDR)-1)
 131 #define ELEM_TYPE_MSG      "msg"
 132 #define ELEM_TYPE_MSG_LEN  (sizeof(ELEM_TYPE_MSG)-1)
 133 #define ELEM_IS_AVP        (1<<0)
 134 #define ELEM_IS_HDR        (1<<1)
 135 #define ELEM_IS_MSG        (1<<2)
 136
 137 #define ELEM_VAL_BODY      "body"
 138 #define ELEM_VAL_BODY_LEN  (sizeof(ELEM_VAL_BODY)-1)
 139
 140
 141 static struct tw_append *tw_appends;
 142
 143
 144 static void print_tw_append( struct tw_append *append)
 145 {
 146         struct hdr_avp *ha;
 147
 148         if (!append)
 149                 return;
 150
 151         LM_DBG("tw_append name=<%.*s>\n",
 152                 append->name.len,append->name.s);
 153         for( ha=append->elems ; ha ; ha=ha->next ) {
 154                 LM_DBG("\ttitle=<%.*s>\n",ha->title.len,ha->title.s);
 155                 LM_DBG("\t\tttype=<%d>\n",ha->type);
 156                 LM_DBG("\t\tsval=<%.*s>\n",ha->sval.len,ha->sval.s);
 157                 LM_DBG("\t\tival=<%d>\n",ha->ival);
 158         }
 159 }
 160
 161
 162 /* tw_append syntax:
 163  * tw_append = name:element[;element]
 164  * element   = [title=]value
 165  * value     = avp[avp_spec] | hdr[hdr_name] | msg[body] */
 166 int parse_tw_append( modparam_t type, void* val)
 167 {
 168         struct hdr_field hdr;
 169         struct hdr_avp *last;
 170         struct hdr_avp *ha=NULL;
 171         struct tw_append *app;
 172         int_str avp_name;
 173         char *s;
 174         char bar;
 175         str foo;
 176         int n;
 177         int index;
 178
 179         if (val==0 || ((char*)val)[0]==0)
 180                 return 0;
 181         s = (char*)val;
 182
 183         /* start parsing - first the name */
 184         while( *s && isspace((int)*s) )  s++;
 185         if ( !*s || *s==':')
 186                 goto parse_error;
 187         foo.s = s;
 188         while ( *s && *s!=':' && !isspace((int)*s) ) s++;
 189         if ( !*s || foo.s==s )
 190                 goto parse_error;
 191         foo.len = s - foo.s;
 192         /* parse separator */
 193         while( *s && isspace((int)*s) )  s++;
 194         if ( !*s || *s!=':')
 195                 goto parse_error;
 196         s++;
 197         while( *s && isspace((int)*s) )  s++;
 198         if ( !*s )
 199                 goto parse_error;
 200
 201         /* check for name duplication */
 202         for(app=tw_appends;app;app=app->next)
 203                 if (app->name.len==foo.len && !strncasecmp(app->name.s,foo.s,foo.len)){
 204                         LM_ERR("duplicated tw_append name <%.*s>\n",foo.len,foo.s);
 205                         goto error;
 206                 }
 207
 208         /* new tw_append structure */
 209         app = (struct tw_append*)pkg_malloc( sizeof(struct tw_append) );
 210         if (app==0) {
 211                 PKG_MEM_ERROR;
 212                 goto error;
 213         }
 214         app->name.s = (char*)pkg_malloc( foo.len+1 );
 215         if (app->name.s==0) {
 216                 PKG_MEM_ERROR;
 217                 goto error;
 218         }
 219         memcpy( app->name.s, foo.s, foo.len);
 220         app->name.len = foo.len;
 221         app->name.s[app->name.len] = 0;
 222         last = app->elems = 0;
 223         app->next = tw_appends;
 224         tw_appends = app;
 225
 226         /* parse the elements */
 227         while (*s) {
 228                 /* parse element title or element type */
 229                 foo.s = s;
 230                 while( *s && *s!='[' && *s!='=' && *s!=';' && !isspace((int)*s) ) s++;
 231                 if ( !*s || foo.s==s)
 232                         goto parse_error;
 233                 foo.len = s - foo.s;
 234                 /* new hdr_avp structure */
 235                 ha = (struct hdr_avp*)pkg_malloc( sizeof(struct hdr_avp) );
 236                 if (ha==0) {
 237                         PKG_MEM_ERROR;
 238                         goto error;
 239                 }
 240                 memset( ha, 0, sizeof(struct hdr_avp));
 241                 if (*s!='[') {
 242                         /* foo must by title or some error -> parse separator */
 243                         while( *s && isspace((int)*s) )  s++;
 244                         if ( !*s || *s!='=')
 245                                 goto parse_error;
 246                         s++;
 247                         while( *s && isspace((int)*s) )  s++;
 248                         if ( !*s )
 249                                 goto parse_error;
 250                         /* set the title */
 251                         ha->title.s = (char*)pkg_malloc( foo.len+1 );
 252                         if (ha->title.s==0) {
 253                                 PKG_MEM_ERROR;
 254                                 goto error;
 255                         }
 256                         memcpy( ha->title.s, foo.s, foo.len);
 257                         ha->title.len = foo.len;
 258                         ha->title.s[ha->title.len] = 0;
 259                         /* parse the type now */
 260                         foo.s = s;
 261                         while( *s && *s!='[' && *s!=']' && *s!=';' && !isspace((int)*s) )
 262                                 s++;
 263                         if ( *s!='[' || foo.s==s)
 264                                 goto parse_error;
 265                         foo.len = s - foo.s;
 266                 }
 267                 /* foo containes the elemet type */
 268                 if ( foo.len==ELEM_TYPE_AVP_LEN &&
 269                 !strncasecmp( foo.s, ELEM_TYPE_AVP, foo.len) ) {
 270                         ha->type = ELEM_IS_AVP;
 271                 } else if ( foo.len==ELEM_TYPE_HDR_LEN &&
 272                 !strncasecmp( foo.s, ELEM_TYPE_HDR, foo.len) ) {
 273                         ha->type = ELEM_IS_HDR;
 274                 } else if ( foo.len==ELEM_TYPE_MSG_LEN &&
 275                 !strncasecmp( foo.s, ELEM_TYPE_MSG, foo.len) ) {
 276                         ha->type = ELEM_IS_MSG;
 277                 } else {
 278                         LM_ERR("unknown type <%.*s>\n", foo.len, foo.s);
 279                         goto error;
 280                 }
 281                 /* parse the element name */
 282                 s++;
 283                 foo.s = s;
 284                 while( *s && *s!=']' && *s!=';' && !isspace((int)*s) ) s++;
 285                 if ( *s!=']' || foo.s==s )
 286                         goto parse_error;
 287                 foo.len = s - foo.s;
 288                 s++;
 289                 /* process and optimize the element name */
 290                 if (ha->type==ELEM_IS_AVP) {
 291                         /* element is AVP */
 292                         if ( parse_avp_spec( &foo, &n, &avp_name, &index)!=0 ) {
 293                                 LM_ERR("bad alias spec <%.*s>\n",foo.len, foo.s);
 294                                 goto error;
 295                         }
 296                         if (n&AVP_NAME_STR) {
 297                                 /* string name */
 298                                 ha->sval.s = (char*)pkg_malloc(avp_name.s.len+1);
 299                                 if (ha->sval.s==0) {
 300                                         PKG_MEM_ERROR;
 301                                         goto error;
 302                                 }
 303                                 memcpy( ha->sval.s, avp_name.s.s, avp_name.s.len);
 304                                 ha->sval.len = avp_name.s.len;
 305                                 ha->sval.s[ha->sval.len] = 0;
 306                                 if (ha->title.s==0)
 307                                         ha->title = ha->sval;
 308                         } else {
 309                                 /* ID name - if title is missing, convert the ID to
 310                                  * string and us it a title */
 311                                 ha->ival = avp_name.n;
 312                                 if (ha->title.s==0) {
 313                                         foo.s=int2str((unsigned long)ha->ival, &foo.len);
 314                                         ha->title.s = (char*)pkg_malloc( n+1 );
 315                                         if (ha->title.s==0) {
 316                                                 PKG_MEM_ERROR;
 317                                                 goto error;
 318                                         }
 319                                         memcpy( ha->title.s, foo.s, foo.len);
 320                                         ha->title.len = foo.len;
 321                                         ha->title.s[ha->title.len] = 0;
 322                                 }
 323                         }
 324                 } else if (ha->type==ELEM_IS_HDR) {
 325                         /* element is HDR -  try to get it's coded type if defined */
 326                         bar = foo.s[foo.len];
 327                         foo.s[foo.len] = ':';
 328                         /* parse header name */
 329                         if (parse_hname2( foo.s, foo.s+foo.len+1, &hdr)==0) {
 330                                 LM_ERR("BUG: parse header failed\n");
 331                                 goto error;
 332                         }
 333                         foo.s[foo.len] = bar;
 334                         ha->ival = hdr.type;
 335                         if (hdr.type==HDR_OTHER_T || ha->title.s==0) {
 336                                 /* duplicate hdr name */
 337                                 ha->sval.s = (char*)pkg_malloc(foo.len+1);
 338                                 if (ha->sval.s==0) {
 339                                         PKG_MEM_ERROR;
 340                                         goto error;
 341                                 }
 342                                 memcpy( ha->sval.s, foo.s, foo.len);
 343                                 ha->sval.len = foo.len;
 344                                 ha->sval.s[ha->sval.len] = 0;
 345                                 if (ha->title.s==0)
 346                                         ha->title = ha->sval;
 347                         }
 348                 } else {
 349                         /* element is MSG */
 350                         if ( !(foo.len==ELEM_VAL_BODY_LEN &&
 351                         !strncasecmp(ELEM_VAL_BODY,foo.s,foo.len)) ) {
 352                                 LM_ERR("unsupported value <%.*s> for msg type\n",foo.len,foo.s);
 353                                 goto error;
 354                         }
 355                         app->add_body = 1;
 356                         pkg_free( ha );
 357                         ha = 0;
 358                 }
 359
 360                 /* parse the element separator, if present */
 361                 while( *s && isspace((int)*s) )  s++;
 362                 if ( *s && *s!=';')
 363                         goto parse_error;
 364                 if (*s==';') {
 365                         s++;
 366                         while( *s && isspace((int)*s) )  s++;
 367                         if (!*s)
 368                                 goto parse_error;
 369                 }
 370
 371                 /* link the element to tw_append structure */
 372                 if (ha) {
 373                         if (last==0) {
 374                                 last = app->elems = ha;
 375                         } else {
 376                                 last->next = ha;
 377                                 last = ha;
 378                         }
 379                         ha = NULL;
 380                 }
 381
 382         } /* end while */
 383
 384         print_tw_append( app );
 385         /* free the old string */
 386         pkg_free(val);
 387         return 0;
 388 parse_error:
 389         LM_ERR("parse error in <%s> around position %ld\n",
 390                         (char*)val, (long)(s-(char*)val));
 391 error:
 392         if(ha) pkg_free(ha);
 393         return -1;
 394 }
 395
 396
 397 static struct tw_append *search_tw_append(char *name, int len)
 398 {
 399         struct tw_append * app;
 400
 401         for( app=tw_appends ; app ; app=app->next )
 402                 if (app->name.len==len && !strncasecmp(app->name.s,name,len) )
 403                         return app;
 404         return 0;
 405 }
 406
 407
 408 int fixup_t_write( void** param, int param_no)
 409 {
 410         struct tw_info *twi;
 411         char *s;
 412
 413         if (param_no==2) {
 414                 twi = (struct tw_info*)pkg_malloc( sizeof(struct tw_info) );
 415                 if (twi==0) {
 416                         PKG_MEM_ERROR;
 417                         return E_OUT_OF_MEM;
 418                 }
 419                 memset( twi, 0 , sizeof(struct tw_info));
 420                 s = (char*)*param;
 421                 twi->action.s = s;
 422                 if ( (s=strchr(s,'/'))!=0) {
 423                         twi->action.len = s - twi->action.s;
 424                         if (twi->action.len==0) {
 425                                 LM_ERR("empty action name\n");
 426                                 pkg_free(twi);
 427                                 return E_CFG;
 428                         }
 429                         s++;
 430                         if (*s==0) {
 431                                 LM_ERR("empty append name\n");
 432                                 pkg_free(twi);
 433                                 return E_CFG;
 434                         }
 435                         twi->append = search_tw_append( s, strlen(s));
 436                         if (twi->append==0) {
 437                                 LM_ERR("unknown append name <%s>\n",s);
 438                                 pkg_free(twi);
 439                                 return E_CFG;
 440                         }
 441                 } else {
 442                         twi->action.len = strlen(twi->action.s);
 443                 }
 444                 *param=(void*)twi;
 445         }
 446
 447         return 0;
 448 }
 449
 450
 451 int init_twrite_sock(void)
 452 {
 453         int flags;
 454
 455         sock = socket(PF_LOCAL, SOCK_DGRAM, 0);
 456         if (sock == -1) {
 457                 LM_ERR("unable to create socket: %s\n", strerror(errno));
 458                 return -1;
 459         }
 460
 461         /* Turn non-blocking mode on */
 462         flags = fcntl(sock, F_GETFL);
 463         if (flags == -1){
 464                 LM_ERR("fcntl failed: %s\n", strerror(errno));
 465                 close(sock);
 466                 return -1;
 467         }
 468
 469         if (fcntl(sock, F_SETFL, flags | O_NONBLOCK) == -1) {
 470                 LM_ERR("fcntl: set non-blocking failed: %s\n", strerror(errno));
 471                 close(sock);
 472                 return -1;
 473         }
 474         return 0;
 475 }
 476
 477
 478 int init_twrite_lines()
 479 {
 480         int i;
 481
 482         /* init the line table */
 483         for(i=0;i<TWRITE_PARAMS;i++) {
 484                 iov_lines_eol[2*i].iov_base = 0;
 485                 iov_lines_eol[2*i].iov_len = 0;
 486                 iov_lines_eol[2*i+1] = eol;
 487         }
 488
 489         /* first line is the version - fill it now */
 490         eol_line_s(0)   = TWRITE_VERSION_S;
 491         eol_line_len(0) = TWRITE_VERSION_LEN;
 492
 493         return 0;
 494 }
 495
 496
 497 static int inline write_to_fifo(char *fifo, int cnt )
 498 {
 499         int   fd_fifo;
 500
 501         /* open FIFO file stream */
 502         if((fd_fifo = open(fifo,O_WRONLY | O_NONBLOCK)) == -1){
 503                 switch(errno){
 504                         case ENXIO:
 505                                 LM_ERR("cannot open fifo file - nobody listening for reading"
 506                                         " [%s] (%s)\n", fifo, strerror(errno));
 507                                 break;
 508                         default:
 509                                 LM_ERR("failed to open [%s] fifo: %s\n", fifo, strerror(errno));
 510                 }
 511                 goto error;
 512         }
 513
 514         /* write now (unbuffered straight-down write) */
 515 repeat:
 516         if (writev(fd_fifo, iov_lines_eol, 2*cnt)<0) {
 517                 if (errno!=EINTR) {
 518                         LM_ERR("writev failed: %s\n", strerror(errno));
 519                         close(fd_fifo);
 520                         goto error;
 521                 } else {
 522                         goto repeat;
 523                 }
 524         }
 525         close(fd_fifo);
 526
 527         LM_DBG("write completed\n");
 528         return 1; /* OK */
 529
 530 error:
 531         return -1;
 532 }
 533
 534
 535 static inline char* add2buf(char *buf, char *end, char *title, int title_len,
 536                         char *value , int value_len)
 537 {
 538         if (buf+title_len+value_len+2+1>=end)
 539                 return 0;
 540         memcpy( buf, title, title_len);
 541         buf += title_len;
 542         *(buf++) = ':';
 543         *(buf++) = ' ';
 544         memcpy( buf, value, value_len);
 545         buf += value_len;
 546         *(buf++) = '\n';
 547         return buf;
 548 }
 549
 550
 551 static inline char* append2buf( char *buf, int len, struct sip_msg *req,
 552                         struct hdr_avp *ha)
 553 {
 554         struct hdr_field *hdr;
 555         struct usr_avp   *avp;
 556         int_str          avp_val;
 557         int_str          avp_name;
 558         char  *end;
 559         str   foo;
 560         int   msg_parsed;
 561
 562         end = buf+len;
 563         msg_parsed = 0;
 564
 565         while(ha) {
 566                 if (ha->type==ELEM_IS_AVP) {
 567                         /* search for the AVP */
 568                         if (ha->sval.s) {
 569                                 avp_name.s=ha->sval;
 570                                 avp = search_first_avp( AVP_NAME_STR, avp_name, &avp_val, 0);
 571                                 LM_DBG("AVP <%.*s>: %p\n",avp_name.s.len, avp_name.s.s, avp);
 572                         } else {
 573                                 avp_name.n=ha->ival;
 574                                 avp = search_first_avp( 0, avp_name, &avp_val, 0);
 575                                 LM_DBG("AVP <%i>: %p\n",avp_name.n,avp);
 576                         }
 577                         if (avp) {
 578                                 if (avp->flags&AVP_VAL_STR) {
 579                                         buf=add2buf( buf, end, ha->title.s, ha->title.len,
 580                                                 avp_val.s.s , avp_val.s.len);
 581                                         if (!buf)
 582                                                 goto overflow_err;
 583                                 } else {
 584                                         foo.s=int2str( (unsigned long)avp_val.n, &foo.len);
 585                                         buf=add2buf( buf, end, ha->title.s, ha->title.len,
 586                                                 foo.s , foo.len);
 587                                         if (!buf)
 588                                                 goto overflow_err;
 589                                 }
 590                         }
 591                 } else if (ha->type==ELEM_IS_HDR) {
 592                         /* parse the HDRs */
 593                         if (!msg_parsed) {
 594                                 if (parse_headers( req, HDR_EOH_F, 0)!=0) {
 595                                         LM_ERR("parsing hdrs failed\n");
 596                                         goto error;
 597                                 }
 598                                 msg_parsed = 1;
 599                         }
 600                         /* search the HDR */
 601                         if (ha->ival==HDR_OTHER_T) {
 602                                 for(hdr=req->headers;hdr;hdr=hdr->next)
 603                                         if (ha->sval.len==hdr->name.len &&
 604                                         strncasecmp( ha->sval.s, hdr->name.s, hdr->name.len)==0)
 605                                                 break;
 606                         } else {
 607                                 for(hdr=req->headers;hdr;hdr=hdr->next)
 608                                         if (ha->ival==hdr->type)
 609                                                 break;
 610                         }
 611                         if (hdr) {
 612                                 trim_len( foo.len, foo.s, hdr->body);
 613                                 buf=add2buf( buf, end, ha->title.s, ha->title.len,
 614                                         foo.s , foo.len);
 615                                 if (!buf)
 616                                         goto overflow_err;
 617                         }
 618                 } else {
 619                         LM_ERR("BUG: unknown element type %d\n", ha->type);
 620                         goto error;
 621                 }
 622
 623                 ha = ha->next;
 624         }
 625
 626         return buf;
 627 overflow_err:
 628         LM_ERR("overflow -> append exceeded %d len\n",len);
 629 error:
 630         return 0;
 631 }
 632
 633
 634 static int assemble_msg(struct sip_msg* msg, struct tw_info *twi)
 635 {
 636         static char     id_buf[IDBUF_LEN];
 637         static char     route_buffer[ROUTE_BUFFER_MAX];
 638         static char     append_buf[APPEND_BUFFER_MAX];
 639         static char     cmd_buf[CMD_BUFFER_MAX];
 640         static str      empty_param = STR_STATIC_INIT(".");
 641         unsigned int      hash_index, label;
 642         contact_body_t*   cb=0;
 643         contact_t*        c=0;
 644         name_addr_t       na;
 645         rr_t*             record_route;
 646         struct hdr_field* p_hdr;
 647         param_hooks_t     hooks;
 648         int               l;
 649         char*             s, fproxy_lr;
 650         int               first_rr;
 651         str               route, next_hop, append, tmp_s, body, str_uri;
 652
 653         if(msg->first_line.type != SIP_REQUEST){
 654                 LM_ERR("called for something else thena SIP request\n");
 655                 goto error;
 656         }
 657
 658         /* parse all -- we will need every header field for a UAS */
 659         if ( parse_headers(msg, HDR_EOH_F, 0)==-1) {
 660                 LM_ERR("parse_headers failed\n");
 661                 goto error;
 662         }
 663
 664         /* find index and hash; (the transaction can be safely used due
 665          * to refcounting till script completes) */
 666         if( t_get_trans_ident(msg,&hash_index,&label) == -1 ) {
 667                 LM_ERR("assemble_msg: t_get_trans_ident failed\n");
 668                 goto error;
 669         }
 670
 671         /* parse from header */
 672         if (msg->from==0 || (msg->from->parsed==0 && parse_from_header(msg)==-1)) {
 673                 LM_ERR("while parsing <From:> header\n");
 674                 goto error;
 675         }
 676
 677         /* parse the RURI (doesn't make any malloc) */
 678         msg->parsed_uri_ok = 0; /* force parsing */
 679         if (parse_sip_msg_uri(msg)<0) {
 680                 LM_ERR("uri has not been parsed\n");
 681                 goto error;
 682         }
 683
 684         /* parse contact header */
 685         str_uri.s = 0;
 686         str_uri.len = 0;
 687         if(msg->contact) {
 688                 if (msg->contact->parsed==0 && parse_contact(msg->contact)==-1) {
 689                         LM_ERR("error while parsing 'Contact' header\n");
 690                         goto error;
 691                 }
 692                 cb = (contact_body_t*)msg->contact->parsed;
 693                 if(cb && (c=cb->contacts)) {
 694                         str_uri = c->uri;
 695                         if (find_not_quoted(&str_uri,'<')) {
 696                                 parse_nameaddr(&str_uri,&na);
 697                                 str_uri = na.uri;
 698                         }
 699                 }
 700         }
 701
 702         /* str_uri is taken from caller's contact or from header
 703          * for backwards compatibility with pre-3261 (from is already parsed)*/
 704         if(!str_uri.len || !str_uri.s)
 705                 str_uri = get_from(msg)->uri;
 706
 707         /* parse Record-Route headers */
 708         route.s = s = route_buffer; route.len = 0;
 709         fproxy_lr = 0;
 710         next_hop = empty_param;
 711
 712         p_hdr = msg->record_route;
 713         if(p_hdr) {
 714                 if (p_hdr->parsed==0 && parse_rr(p_hdr)!=0 ) {
 715                         LM_ERR("while parsing 'Record-Route' header\n");
 716                         goto error;
 717                 }
 718                 record_route = (rr_t*)p_hdr->parsed;
 719         } else {
 720                 record_route = 0;
 721         }
 722
 723         first_rr = 1;
 724
 725         if( record_route ) {
 726                 if ( (tmp_s.s=find_not_quoted(&record_route->nameaddr.uri,';'))!=0 &&
 727                 tmp_s.s+1!=record_route->nameaddr.uri.s+
 728                 record_route->nameaddr.uri.len) {
 729                         /* Parse all parameters */
 730                         tmp_s.len = record_route->nameaddr.uri.len - (tmp_s.s-
 731                                 record_route->nameaddr.uri.s);
 732                         if (parse_params( &tmp_s, CLASS_URI, &hooks,
 733                         &record_route->params) < 0) {
 734                                 LM_ERR("error while parsing record route uri params\n");
 735                                 goto error;
 736                         }
 737                         fproxy_lr = (hooks.uri.lr != 0);
 738                         LM_DBG("record_route->nameaddr.uri: %.*s\n",
 739                                 record_route->nameaddr.uri.len,record_route->nameaddr.uri.s);
 740                         if(fproxy_lr){
 741                                 first_rr = 0;
 742                                 LM_DBG("first proxy has loose routing.\n");
 743                                 copy_route(s,route.len,record_route->nameaddr.uri.s,
 744                                         record_route->nameaddr.uri.len);
 745                         }
 746                 }
 747                 for(;p_hdr;p_hdr = p_hdr->next) {
 748                         /* filter out non-RR hdr and empty hdrs */
 749                         if( (p_hdr->type!=HDR_RECORDROUTE_T) || p_hdr->body.len==0)
 750                                 continue;
 751
 752                         if(p_hdr->parsed==0 && parse_rr(p_hdr)!=0 ){
 753                                 LM_ERR("while parsing 'Record-route' header\n");
 754                                 goto error;
 755                         }
 756                         for(record_route=p_hdr->parsed; record_route;
 757                                                 record_route=record_route->next){
 758                                 LM_DBG("record_route->nameaddr.uri: <%.*s>\n",
 759                                                 record_route->nameaddr.uri.len,
 760                                                 record_route->nameaddr.uri.s);
 761                                 if (!first_rr) {
 762                                         copy_route(s,route.len,record_route->nameaddr.uri.s,
 763                                                         record_route->nameaddr.uri.len);
 764                                 }
 765                                 first_rr=0;
 766                         }
 767                 }
 768
 769                 if(!fproxy_lr){
 770                         copy_route(s,route.len,str_uri.s,str_uri.len);
 771                         str_uri = ((rr_t*)msg->record_route->parsed)->nameaddr.uri;
 772                 } else {
 773                         next_hop = ((rr_t*)msg->record_route->parsed)->nameaddr.uri;
 774                 }
 775         }
 776
 777         LM_DBG("calculated route: %.*s\n", route.len,route.len ? route.s : "");
 778         LM_DBG("next r-uri: %.*s\n", str_uri.len,str_uri.len ? str_uri.s : "");
 779
 780         if ( REQ_LINE(msg).method_value==METHOD_INVITE ||
 781                         REQ_LINE(msg).method_value==METHOD_INFO ||
 782                         (twi->append && twi->append->add_body) ) {
 783                 /* get body */
 784                 if( (body.s = get_body(msg)) == 0 ){
 785                         LM_ERR("get_body failed\n");
 786                         goto error;
 787                 }
 788                 body.len = msg->len - (body.s - msg->buf);
 789         } else {
 790                 body = empty_param;
 791         }
 792
 793         /* additional headers */
 794         append.s = s = append_buf;
 795         if (sizeof(flag_t)*2+12+1 >= APPEND_BUFFER_MAX) {
 796                 LM_ERR("buffer overflow while copying optional header\n");
 797                 goto error;
 798         }
 799         append_str(s,"P-MsgFlags: ",12);
 800         l = APPEND_BUFFER_MAX - (12+1); /* include trailing `\n'*/
 801
 802         if (int2reverse_hex(&s, &l, (int)msg->msg_flags) == -1) {
 803                 LM_ERR("buffer overflow while copying optional header\n");
 804                 goto error;
 805         }
 806         append_chr(s,'\n');
 807
 808         if ( twi->append && ((s=append2buf( s, APPEND_BUFFER_MAX-(s-append.s), msg,
 809         twi->append->elems))==0) )
 810                 goto error;
 811
 812         /* body separator */
 813         append_chr(s,'.');
 814         append.len = s-append.s;
 815
 816         eol_line_s(1) = s = cmd_buf;
 817         if(twi->action.len+12 >= CMD_BUFFER_MAX){
 818                 LM_ERR("buffer overflow while copying command name\n");
 819                 goto error;
 820         }
 821         append_str(s,"sip_request.",12);
 822         append_str(s,twi->action.s, twi->action.len);
 823         eol_line_len(1) = s - (char*)eol_line_s(1);
 824
 825         eol_line(2,REQ_LINE(msg).method);     /* method type */
 826         eol_line(3,msg->parsed_uri.user);     /* user from r-uri */
 827         eol_line(4,msg->parsed_uri.host);     /* domain */
 828
 829         eol_line(5,msg->rcv.bind_address->address_str); /* dst ip */
 830
 831         eol_line(6,msg->rcv.dst_port==SIP_PORT ?
 832                         empty_param : msg->rcv.bind_address->port_no_str); /* port */
 833
 834         /* r_uri ('Contact:' for next requests) */
 835         eol_line(7,msg->first_line.u.request.uri);
 836
 837         /* r_uri for subsequent requests */
 838         eol_line(8,str_uri.len?str_uri:empty_param);
 839
 840         eol_line(9,get_from(msg)->body);                /* from */
 841         eol_line(10,msg->to->body);                     /* to */
 842         eol_line(11,msg->callid->body);         /* callid */
 843         eol_line(12,get_from(msg)->tag_value);  /* from tag */
 844         eol_line(13,get_to(msg)->tag_value);    /* to tag */
 845         eol_line(14,get_cseq(msg)->number);     /* cseq number */
 846
 847         eol_line_s(15)=id_buf;       /* hash:label */
 848         s = int2str(hash_index, &l);
 849         if (l+1>=IDBUF_LEN) {
 850                 LM_ERR("too big hash\n");
 851                 goto error;
 852         }
 853         memcpy(id_buf, s, l);
 854         id_buf[l]=':';
 855         eol_line_len(15)=l+1;
 856         s = int2str(label, &l);
 857         if (l+1+eol_line_len(15)>=IDBUF_LEN) {
 858                 LM_ERR("too big label\n");
 859                 goto error;
 860         }
 861         memcpy(id_buf+eol_line_len(15), s, l);
 862         eol_line_len(15) += l;
 863
 864         eol_line(16, route.len ? route : empty_param );
 865         eol_line(17, next_hop );
 866         eol_line(18, append );
 867         eol_line(19, body );
 868
 869         /* success */
 870         return 1;
 871 error:
 872         /* 0 would lead to immediate script exit -- -1 returns
 873          * with 'false' to script processing */
 874         return -1;
 875 }
 876
 877
 878 static int write_to_unixsock(char* sockname, int cnt)
 879 {
 880         int len, e;
 881         struct sockaddr_un dest;
 882
 883         if (!sockname) {
 884                 LM_ERR("Invalid parameter\n");
 885                 return E_UNSPEC;
 886         }
 887
 888         len = strlen(sockname);
 889         if (len == 0) {
 890                 LM_DBG("Error - empty socket name\n");
 891                 return -1;
 892         } else if (len > 107) {
 893                 LM_ERR("Socket name too long\n");
 894                 return -1;
 895         }
 896
 897         memset(&dest, 0, sizeof(dest));
 898         dest.sun_family = PF_LOCAL;
 899         memcpy(dest.sun_path, sockname, len);
 900 #ifdef HAVE_SOCKADDR_SA_LEN
 901         dest.sun_len = len;
 902 #endif
 903
 904         e = connect(sock, (struct sockaddr*)&dest, SUN_LEN(&dest));
 905 #ifdef HAVE_CONNECT_ECONNRESET_BUG
 906         /*
 907          * Workaround for a nasty bug in BSD kernels dated back
 908          * to the Berkeley days, so that can be found in many modern
 909          * BSD-derived kernels. Workaround should be pretty harmless since
 910          * in normal conditions connect(2) can never return ECONNRESET.
 911          */
 912         if ((e == -1) && (errno == ECONNRESET))
 913                 e = 0;
 914 #endif
 915         if (e == -1) {
 916                 LM_ERR("error in connect: %s\n", strerror(errno));
 917                 return -1;
 918         }
 919
 920         if (tsend_dgram_ev(sock, iov_lines_eol, 2 * cnt,
 921                         cfg_get(tm, tm_cfg, tm_unix_tx_timeout)) < 0) {
 922                 LM_ERR("writev failed: %s\n", strerror(errno));
 923                 return -1;
 924         }
 925
 926         return 0;
 927 }
 928
 929
 930 int t_write_req(struct sip_msg* msg, char* vm_fifo, char* info)
 931 {
 932         if (assemble_msg(msg, (struct tw_info*)info) < 0) {
 933                 LM_ERR("error int assemble_msg\n");
 934                 return -1;
 935         }
 936
 937         if (write_to_fifo(vm_fifo, TWRITE_PARAMS) == -1) {
 938                 LM_ERR("write_to_fifo failed\n");
 939                 return -1;
 940         }
 941
 942         /* make sure that if voicemail does not initiate a reply
 943          * timely, a SIP timeout will be sent out */
 944         if (add_blind_uac() == -1) {
 945                 LM_ERR("add_blind failed\n");
 946                 return -1;
 947         }
 948         return 1;
 949 }
 950
 951
 952 int t_write_unix(struct sip_msg* msg, char* socket, char* info)
 953 {
 954         if (assemble_msg(msg, (struct tw_info*)info) < 0) {
 955                 LM_ERR("error in assemble_msg\n");
 956                 return -1;
 957         }
 958
 959         if (write_to_unixsock(socket, TWRITE_PARAMS) == -1) {
 960                 LM_ERR("write_to_unixsock failed\n");
 961                 return -1;
 962         }
 963
 964         /* make sure that if voicemail does not initiate a reply
 965          * timely, a SIP timeout will be sent out */
 966         if (add_blind_uac() == -1) {
 967                 LM_ERR("add_blind failed\n");
 968                 return -1;
 969         }
 970         return 1;
 971 }