epan/gcp.c

   1 /*
   2  * gcp.c
   3  * Gateway Control Protocol -- Context Tracking
   4  *
   5  * $Id$
   6  *
   7  * Wireshark - Network traffic analyzer
   8  * By Gerald Combs <gerald@wireshark.org>
   9  * Copyright 1998 Gerald Combs
  10  *
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU General Public License
  13  * as published by the Free Software Foundation; either version 2
  14  * of the License, or (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  24  */
  25
  26  /*
  27   * TO DO:
  28   *  - handle text-encoded termination wildcards adequtelly
  29   *  - avoid persistent tracking of NULL and ALL contexts
  30   */
  31
  32 #ifdef HAVE_CONFIG_H
  33 # include "config.h"
  34 #endif
  35
  36 #include "gcp.h"
  37
  38 static emem_tree_t* msgs = NULL;
  39 static emem_tree_t* trxs = NULL;
  40 static emem_tree_t* ctxs_by_trx = NULL;
  41 static emem_tree_t* ctxs = NULL;
  42
  43 const value_string gcp_cmd_type[] = {
  44     { GCP_CMD_NONE, "NoCommand"},
  45     { GCP_CMD_ADD_REQ, "addReq"},
  46     { GCP_CMD_MOVE_REQ, "moveReq"},
  47     { GCP_CMD_MOD_REQ, "modReq"},
  48     { GCP_CMD_SUB_REQ, "subtractReq"},
  49     { GCP_CMD_AUDITCAP_REQ, "auditCapRequest"},
  50     { GCP_CMD_AUDITVAL_REQ, "auditValueRequest"},
  51     { GCP_CMD_NOTIFY_REQ, "notifyReq"},
  52     { GCP_CMD_SVCCHG_REQ, "serviceChangeReq"},
  53     { GCP_CMD_TOPOLOGY_REQ, "topologyReq"},
  54     { GCP_CMD_CTX_ATTR_AUDIT_REQ, "ctxAttrAuditReq"},
  55     { GCP_CMD_ADD_REPLY, "addReply"},
  56     { GCP_CMD_MOVE_REPLY, "moveReply"},
  57     { GCP_CMD_MOD_REPLY, "modReply"},
  58     { GCP_CMD_SUB_REPLY, "subtractReply"},
  59     { GCP_CMD_AUDITCAP_REPLY, "auditCapReply"},
  60     { GCP_CMD_AUDITVAL_REPLY, "auditValReply"},
  61     { GCP_CMD_NOTIFY_REPLY, "notifyReply"},
  62     { GCP_CMD_SVCCHG_REPLY, "serviceChangeReply"},
  63     { GCP_CMD_TOPOLOGY_REPLY, "topologyReply"},
  64     { 0, NULL }
  65 };
  66
  67 const value_string gcp_term_types[] = {
  68     { GCP_TERM_TYPE_AAL1, "aal1" },
  69     { GCP_TERM_TYPE_AAL2, "aal2" },
  70     { GCP_TERM_TYPE_AAL1_STRUCT, "aal1struct" },
  71     { GCP_TERM_TYPE_IP_RTP, "ipRtp" },
  72     { GCP_TERM_TYPE_TDM, "tdm" },
  73     { 0, NULL }
  74 };
  75
  76
  77 void gcp_init(void) {
  78     static gboolean gcp_initialized = FALSE;
  79
  80     if (gcp_initialized)
  81         return;
  82
  83     msgs = se_tree_create(EMEM_TREE_TYPE_RED_BLACK, "gcp_msgs");
  84     trxs = se_tree_create(EMEM_TREE_TYPE_RED_BLACK, "gcp_trxs");
  85     ctxs_by_trx = se_tree_create(EMEM_TREE_TYPE_RED_BLACK, "gcp_ctxs_by_trx");
  86     ctxs = se_tree_create(EMEM_TREE_TYPE_RED_BLACK, "gcp_ctxs");
  87     gcp_initialized = TRUE;
  88 }
  89
  90 gcp_msg_t* gcp_msg(packet_info* pinfo, int o, gboolean keep_persistent_data) {
  91     gcp_msg_t* m;
  92     guint32 framenum = (guint32)pinfo->fd->num;
  93     guint32 offset = (guint32)o;
  94     address* src = &(pinfo->src);
  95     address* dst = &(pinfo->dst);
  96     address* lo_addr;
  97     address* hi_addr;
  98
  99     if (keep_persistent_data) {
 100         emem_tree_key_t key[] = {
 101             {1,&(framenum)},
 102             {1,&offset},
 103             {0,NULL}
 104         };
 105
 106         if (( m = se_tree_lookup32_array(msgs,key) )) {
 107             m->commited = TRUE;
 108             return m;
 109         } else {
 110             m = se_alloc(sizeof(gcp_msg_t));
 111             m->framenum = framenum;
 112             m->time = pinfo->fd->abs_ts;
 113             m->trxs = NULL;
 114             m->commited = FALSE;
 115
 116             se_tree_insert32_array(msgs,key,m);
 117         }
 118     } else {
 119         m = ep_new0(gcp_msg_t);
 120         m->framenum = framenum;
 121         m->trxs = NULL;
 122         m->commited = FALSE;
 123     }
 124
 125     if (CMP_ADDRESS(src, dst) < 0)  {
 126         lo_addr = src;
 127         hi_addr = dst;
 128     } else {
 129         lo_addr = dst;
 130         hi_addr = src;
 131     }
 132
 133     switch(lo_addr->type) {
 134         case AT_NONE:
 135             m->lo_addr = 0;
 136             m->hi_addr = 0;
 137             break;
 138         case AT_IPv4:
 139             memcpy((guint8*)&(m->hi_addr),hi_addr->data,4);
 140             memcpy((guint8*)&(m->lo_addr),lo_addr->data,4);
 141             break;
 142         case AT_SS7PC:
 143             m->hi_addr = mtp3_pc_hash((const mtp3_addr_pc_t *)hi_addr->data);
 144             m->lo_addr = mtp3_pc_hash((const mtp3_addr_pc_t *)lo_addr->data);
 145             break;
 146         default:
 147             /* XXX: heuristic and error prone */
 148             m->hi_addr = g_str_hash(ep_address_to_str(hi_addr));
 149             m->lo_addr = g_str_hash(ep_address_to_str(lo_addr));
 150         break;
 151     }
 152
 153     return m;
 154 }
 155
 156 gcp_trx_t* gcp_trx(gcp_msg_t* m ,guint32 t_id , gcp_trx_type_t type, gboolean keep_persistent_data) {
 157     gcp_trx_t* t = NULL;
 158     gcp_trx_msg_t* trxmsg;
 159
 160     if ( !m ) return NULL;
 161
 162     if (keep_persistent_data) {
 163         if (m->commited) {
 164
 165             for ( trxmsg = m->trxs; trxmsg; trxmsg = trxmsg->next) {
 166                 if (trxmsg->trx && trxmsg->trx->id == t_id) {
 167                     return trxmsg->trx;
 168                 }
 169             }
 170             DISSECTOR_ASSERT_NOT_REACHED();
 171         } else {
 172             emem_tree_key_t key[] = {
 173                 {1,&(m->hi_addr)},
 174                 {1,&(m->lo_addr)},
 175                 {1,&(t_id)},
 176                 {0,NULL}
 177             };
 178
 179             trxmsg = se_alloc(sizeof(gcp_trx_msg_t));
 180             t = se_tree_lookup32_array(trxs,key);
 181
 182             if (!t) {
 183                 t = se_alloc(sizeof(gcp_trx_t));
 184                 t->initial = m;
 185                 t->id = t_id;
 186                 t->type = type;
 187                 t->pendings = 0;
 188                 t->error = 0;
 189                 t->cmds = NULL;
 190
 191                 se_tree_insert32_array(trxs,key,t);
 192             }
 193
 194             /* XXX: request, reply and ack + point to frames where they are */
 195             switch ( type ) {
 196                 case GCP_TRX_PENDING:
 197                     t->pendings++;
 198                     break;
 199                 default:
 200                     break;
 201             }
 202
 203         }
 204     } else {
 205         t = ep_new(gcp_trx_t);
 206         trxmsg = ep_new(gcp_trx_msg_t);
 207         t->initial = NULL;
 208         t->id = t_id;
 209         t->type = type;
 210         t->pendings = 0;
 211         t->error = 0;
 212         t->cmds = NULL;
 213     }
 214
 215     DISSECTOR_ASSERT(trxmsg);
 216
 217     trxmsg->trx = t;
 218     trxmsg->next = NULL;
 219     trxmsg->last = trxmsg;
 220
 221     if (m->trxs) {
 222         m->trxs->last = m->trxs->last->next = trxmsg;
 223     } else {
 224         m->trxs = trxmsg;
 225     }
 226
 227     return t;
 228 }
 229
 230
 231 gcp_ctx_t* gcp_ctx(gcp_msg_t* m, gcp_trx_t* t, guint32 c_id, gboolean persistent) {
 232     gcp_ctx_t* context = NULL;
 233     gcp_ctx_t** context_p = NULL;
 234
 235     if ( !m || !t ) return NULL;
 236
 237     if (persistent) {
 238
 239         emem_tree_key_t ctx_key[] = {
 240             {1,&(m->hi_addr)},
 241             {1,&(m->lo_addr)},
 242             {1,&(c_id)},
 243             {0,NULL}
 244         };
 245
 246         emem_tree_key_t trx_key[] = {
 247             {1,&(m->hi_addr)},
 248             {1,&(m->lo_addr)},
 249             {1,&(t->id)},
 250             {0,NULL}
 251         };
 252
 253         if (m->commited) {
 254             if (( context = se_tree_lookup32_array(ctxs_by_trx,trx_key) )) {
 255                 return context;
 256             } if ((context_p = se_tree_lookup32_array(ctxs,ctx_key))) {
 257                 context = *context_p;
 258
 259                 do {
 260                     if (context->initial->framenum <= m->framenum) {
 261                         return context;
 262                     }
 263                 } while(( context = context->prev ));
 264
 265                 DISSECTOR_ASSERT(! "a context should exist");
 266             }
 267         } else {
 268             if (c_id == CHOOSE_CONTEXT) {
 269                 if (! ( context = se_tree_lookup32_array(ctxs_by_trx,trx_key))) {
 270                     context = se_alloc(sizeof(gcp_ctx_t));
 271                     context->initial = m;
 272                     context->cmds = NULL;
 273                     context->id = c_id;
 274                     context->terms.last = &(context->terms);
 275                     context->terms.next = NULL;
 276                     context->terms.term = NULL;
 277
 278                     se_tree_insert32_array(ctxs_by_trx,trx_key,context);
 279                 }
 280             } else {
 281                 if (( context = se_tree_lookup32_array(ctxs_by_trx,trx_key) )) {
 282                     if (( context_p = se_tree_lookup32_array(ctxs,ctx_key) )) {
 283                         if (context != *context_p) {
 284                             context = se_alloc(sizeof(gcp_ctx_t));
 285                             context->initial = m;
 286                             context->id = c_id;
 287                             context->cmds = NULL;
 288                             context->terms.last = &(context->terms);
 289                             context->terms.next = NULL;
 290                             context->terms.term = NULL;
 291
 292                             context->prev = *context_p;
 293                             *context_p = context;
 294                         }
 295                     } else {
 296                         context_p = se_alloc(sizeof(void*));
 297                         *context_p = context;
 298                         context->initial = m;
 299                         context->id = c_id;
 300                         se_tree_insert32_array(ctxs,ctx_key,context_p);
 301                     }
 302                 } else if (! ( context_p = se_tree_lookup32_array(ctxs,ctx_key) )) {
 303                     context = se_alloc(sizeof(gcp_ctx_t));
 304                     context->initial = m;
 305                     context->id = c_id;
 306                     context->cmds = NULL;
 307                     context->terms.last = &(context->terms);
 308                     context->terms.next = NULL;
 309                     context->terms.term = NULL;
 310
 311                     context_p = se_alloc(sizeof(void*));
 312                     *context_p = context;
 313                     se_tree_insert32_array(ctxs,ctx_key,context_p);
 314                 } else {
 315                     context = *context_p;
 316                 }
 317             }
 318         }
 319     } else {
 320         context = ep_new(gcp_ctx_t);
 321         context->initial = m;
 322         context->cmds = NULL;
 323         context->id = c_id;
 324         context->terms.last = &(context->terms);
 325         context->terms.next = NULL;
 326         context->terms.term = NULL;
 327     }
 328
 329     return context;
 330 }
 331
 332 gcp_cmd_t* gcp_cmd(gcp_msg_t* m, gcp_trx_t* t, gcp_ctx_t* c, gcp_cmd_type_t type, guint offset, gboolean persistent) {
 333     gcp_cmd_t* cmd;
 334     gcp_cmd_msg_t* cmdtrx;
 335     gcp_cmd_msg_t* cmdctx;
 336
 337     if ( !m || !t || !c ) return NULL;
 338
 339     if (persistent) {
 340         if (m->commited) {
 341             DISSECTOR_ASSERT(t->cmds != NULL);
 342
 343             for (cmdctx = t->cmds; cmdctx; cmdctx = cmdctx->next) {
 344                 cmd = cmdctx->cmd;
 345                 if (cmd->msg == m && cmd->offset == offset) {
 346                     return cmd;
 347                 }
 348             }
 349
 350             DISSECTOR_ASSERT(!"called for a command that does not exist!");
 351
 352             return NULL;
 353         } else {
 354             cmd = se_alloc(sizeof(gcp_cmd_t));
 355             cmdtrx = se_alloc(sizeof(gcp_cmd_msg_t));
 356             cmdctx = se_alloc(sizeof(gcp_cmd_msg_t));
 357         }
 358     } else {
 359         cmd = ep_new(gcp_cmd_t);
 360         cmdtrx = ep_new(gcp_cmd_msg_t);
 361         cmdctx = ep_new(gcp_cmd_msg_t);
 362     }
 363
 364     cmd->type = type;
 365     cmd->offset = offset;
 366     cmd->terms.term = NULL;
 367     cmd->terms.next = NULL;
 368     cmd->terms.last = &(cmd->terms);
 369     cmd->str = NULL;
 370     cmd->msg = m;
 371     cmd->trx = t;
 372     cmd->ctx = c;
 373     cmd->error = 0;
 374
 375     cmdctx->cmd = cmdtrx->cmd = cmd;
 376     cmdctx->next =  cmdtrx->next = NULL;
 377     cmdctx->last = cmdtrx->last = NULL;
 378
 379     if (t->cmds) {
 380         t->cmds->last->next = cmdtrx;
 381         t->cmds->last = cmdtrx;
 382     } else {
 383         t->cmds = cmdtrx;
 384         t->cmds->last = cmdtrx;
 385     }
 386
 387     if (c->cmds) {
 388         c->cmds->last->next = cmdctx;
 389         c->cmds->last = cmdctx;
 390     } else {
 391         c->cmds = cmdctx;
 392         c->cmds->last = cmdctx;
 393     }
 394
 395     return cmd;
 396 }
 397
 398
 399 gcp_term_t* gcp_cmd_add_term(gcp_msg_t* m, gcp_trx_t* tr, gcp_cmd_t* c, gcp_term_t* t, gcp_wildcard_t wildcard, gboolean persistent) {
 400     gcp_terms_t* ct;
 401     gcp_terms_t* ct2;
 402
 403     static gcp_term_t all_terms = {"$",(guint8*)"",1,GCP_TERM_TYPE_UNKNOWN,NULL,NULL,NULL};
 404
 405     if ( !c ) return NULL;
 406
 407     if ( wildcard == GCP_WILDCARD_CHOOSE) {
 408         return &all_terms;
 409     }
 410
 411     if (persistent) {
 412         if ( c->msg->commited ) {
 413             if (wildcard == GCP_WILDCARD_ALL) {
 414                 for (ct = c->ctx->terms.next; ct; ct = ct->next) {
 415                     /* XXX not handling more wilcards in one msg */
 416                     if ( ct->term->start == m ) {
 417                         return ct->term;
 418                     }
 419                 }
 420                 return NULL;
 421             } else {
 422                 for (ct = c->ctx->terms.next; ct; ct = ct->next) {
 423                     if ( g_str_equal(ct->term->str,t->str) ) {
 424                         return ct->term;
 425                     }
 426                 }
 427                 return NULL;
 428             }
 429         } else {
 430
 431             for (ct = c->ctx->terms.next; ct; ct = ct->next) {
 432                 if ( g_str_equal(ct->term->str,t->str) || ct->term->start == m) {
 433                     break;
 434                 }
 435             }
 436
 437             if ( ! ct ) {
 438
 439                 if (wildcard == GCP_WILDCARD_ALL) {
 440                     ct = se_alloc(sizeof(gcp_terms_t));
 441                     ct->next = NULL;
 442                     ct->term = se_alloc0(sizeof(gcp_term_t));
 443
 444                     ct->term->start = m;
 445                     ct->term->str = "*";
 446                     ct->term->buffer = NULL;
 447                     ct->term->len = 0;
 448
 449                     c->terms.last = c->terms.last->next = ct;
 450
 451                     ct2 = se_alloc0(sizeof(gcp_terms_t));
 452                     ct2->term = ct->term;
 453
 454                     c->ctx->terms.last->next = ct2;
 455                     c->ctx->terms.last = ct2;
 456
 457                     return ct->term;
 458                 } else {
 459                     for (ct = c->ctx->terms.next; ct; ct = ct->next) {
 460                         /* XXX not handling more wilcards in one msg */
 461                         if ( ct->term->buffer == NULL && tr->cmds->cmd->msg == ct->term->start ) {
 462                             ct->term->str = se_strdup(t->str);
 463                             ct->term->buffer = se_memdup(t->buffer,t->len);
 464                             ct->term->len = t->len;
 465
 466                             ct2 = se_alloc0(sizeof(gcp_terms_t));
 467                             ct2->term = ct->term;
 468
 469                             c->terms.last = c->terms.last->next = ct2;
 470
 471                             return ct->term;
 472                         }
 473
 474                         if  ( g_str_equal(ct->term->str,t->str) ) {
 475                             ct2 = se_alloc0(sizeof(gcp_terms_t));
 476                             ct2->term = ct->term;
 477
 478                             c->terms.last = c->terms.last->next = ct2;
 479
 480                             return ct->term;
 481                         }
 482                     }
 483
 484                     ct = se_alloc(sizeof(gcp_terms_t));
 485                     ct->next = NULL;
 486                     ct->term = se_alloc0(sizeof(gcp_term_t));
 487
 488                     ct->term->start = m;
 489                     ct->term->str = se_strdup(t->str);
 490                     ct->term->buffer = se_memdup(t->buffer,t->len);
 491                     ct->term->len = t->len;
 492
 493                     ct2 = se_alloc0(sizeof(gcp_terms_t));
 494                     ct2->term = ct->term;
 495
 496                     c->terms.last = c->terms.last->next = ct2;
 497
 498                     ct2 = se_alloc0(sizeof(gcp_terms_t));
 499                     ct2->term = ct->term;
 500
 501                     c->ctx->terms.last = c->ctx->terms.last->next = ct2;
 502
 503                     return ct->term;
 504                 }
 505             } else {
 506                 ct2 = se_alloc0(sizeof(gcp_terms_t));
 507                 ct2->term = ct->term;
 508
 509                 c->terms.last = c->terms.last->next = ct2;
 510                 return ct->term;
 511             }
 512
 513             DISSECTOR_ASSERT_NOT_REACHED();
 514         }
 515     } else {
 516         ct = ep_new(gcp_terms_t);
 517         ct->term = t;
 518         ct->next = NULL;
 519         c->terms.last = c->terms.last->next = ct;
 520
 521         return t;
 522     }
 523
 524 }
 525
 526 gchar* gcp_cmd_to_str(gcp_cmd_t* c, gboolean persistent) {
 527     gchar* s;
 528     gcp_terms_t* term;
 529
 530     if ( !c ) return "-";
 531
 532     switch (c->type) {
 533         case GCP_CMD_NONE:
 534             return "-";
 535             break;
 536         case GCP_CMD_ADD_REQ:
 537             s = "AddReq {";
 538             break;
 539         case GCP_CMD_MOVE_REQ:
 540             s = "MoveReq {";
 541             break;
 542         case GCP_CMD_MOD_REQ:
 543             s = "ModReq {";
 544             break;
 545         case GCP_CMD_SUB_REQ:
 546             s = "SubReq {";
 547             break;
 548         case GCP_CMD_AUDITCAP_REQ:
 549             s = "AuditCapReq {";
 550             break;
 551         case GCP_CMD_AUDITVAL_REQ:
 552             s = "AuditValReq {";
 553             break;
 554         case GCP_CMD_NOTIFY_REQ:
 555             s = "NotifyReq {";
 556             break;
 557         case GCP_CMD_SVCCHG_REQ:
 558             s = "SvcChgReq {";
 559             break;
 560         case GCP_CMD_TOPOLOGY_REQ:
 561             s = "TopologyReq {";
 562             break;
 563         case GCP_CMD_CTX_ATTR_AUDIT_REQ:
 564             s = "CtxAttribAuditReq {";
 565             break;
 566         case GCP_CMD_ADD_REPLY:
 567             s = "AddReply {";
 568             break;
 569         case GCP_CMD_MOVE_REPLY:
 570             s = "MoveReply {";
 571             break;
 572         case GCP_CMD_MOD_REPLY:
 573             s = "ModReply {";
 574             break;
 575         case GCP_CMD_SUB_REPLY:
 576             s = "SubReply {";
 577             break;
 578         case GCP_CMD_AUDITCAP_REPLY:
 579             s = "AuditCapReply {";
 580             break;
 581         case GCP_CMD_AUDITVAL_REPLY:
 582             s = "AuditValReply {";
 583             break;
 584         case GCP_CMD_NOTIFY_REPLY:
 585             s = "NotifyReply {";
 586             break;
 587         case GCP_CMD_SVCCHG_REPLY:
 588             s = "SvcChgReply {";
 589             break;
 590         case GCP_CMD_TOPOLOGY_REPLY:
 591             s = "TopologyReply {";
 592             break;
 593         case GCP_CMD_REPLY:
 594             s = "ActionReply {";
 595             break;
 596         case GCP_CMD_OTHER_REQ:
 597             s = "Request {";
 598             break;
 599         default:
 600             s = "-";
 601             break;
 602     }
 603
 604     for (term = c->terms.next; term; term = term->next) {
 605         s = ep_strdup_printf("%s %s",s,term->term->str);
 606     }
 607
 608     if (c->error) {
 609         s = ep_strdup_printf("%s Error=%i",s,c->error);
 610     }
 611
 612     s = ep_strdup_printf("%s }", s);
 613
 614     if (persistent) {
 615         if (! c->str) c->str = se_strdup(s);
 616     } else {
 617         c->str = s;
 618     }
 619
 620     return s;
 621 }
 622
 623 static gchar* gcp_trx_to_str(gcp_msg_t* m, gcp_trx_t* t, gboolean persistent) {
 624     gchar* s;
 625     gcp_cmd_msg_t* c;
 626
 627     if ( !m || !t ) return "-";
 628
 629     s = ep_strdup_printf("T %x { ",t->id);
 630
 631     if (t->cmds) {
 632         if (t->cmds->cmd->ctx) {
 633             s = ep_strdup_printf("%s C %x {",s,t->cmds->cmd->ctx->id);
 634
 635             for (c = t->cmds; c; c = c->next) {
 636                 if (c->cmd->msg == m) {
 637                     s = ep_strdup_printf("%s %s",s,gcp_cmd_to_str(c->cmd,persistent));
 638                 }
 639             }
 640
 641             s = ep_strdup_printf("%s %s",s,"}");
 642         }
 643     }
 644
 645     if (t->error) {
 646         s = ep_strdup_printf("%s Error=%i",s,t->error);
 647     }
 648
 649     return ep_strdup_printf("%s %s",s,"}");
 650 }
 651
 652 gchar* gcp_msg_to_str(gcp_msg_t* m, gboolean persistent) {
 653     gcp_trx_msg_t* t;
 654     gchar* s = "";
 655
 656     if ( !m ) return "-";
 657
 658     for (t = m->trxs; t; t = t->next) {
 659         s = ep_strdup_printf("%s %s",s,gcp_trx_to_str(m,t->trx, persistent));
 660     }
 661
 662     return s;
 663 }
 664
 665 typedef struct _gcp_ctxs_t {
 666     struct _gcp_ctx_t* ctx;
 667     struct _gcp_ctxs_t* next;
 668 } gcp_ctxs_t;
 669
 670 /*static const gchar* trx_types[] = {"None","Req","Reply","Pending","Ack"};*/
 671
 672 void gcp_analyze_msg(proto_tree* gcp_tree, tvbuff_t* gcp_tvb, gcp_msg_t* m, gcp_hf_ett_t* ids) {
 673     gcp_trx_msg_t* t;
 674     gcp_ctxs_t contexts = {NULL,NULL};
 675     gcp_ctxs_t* ctx_node;
 676     gcp_cmd_msg_t* c;
 677
 678
 679     for (t = m->trxs; t; t = t->next) {
 680         for (c = t->trx->cmds; c; c = c->next) {
 681             gcp_ctx_t* ctx = c->cmd->ctx;
 682
 683             for (ctx_node = contexts.next; ctx_node; ctx_node = ctx_node->next) {
 684                 if (ctx_node->ctx->id == ctx->id) {
 685                     break;
 686                 }
 687             }
 688
 689             if (! ctx_node) {
 690                 ctx_node = ep_new(gcp_ctxs_t);
 691                 ctx_node->ctx = ctx;
 692                 ctx_node->next = contexts.next;
 693                 contexts.next = ctx_node;
 694             }
 695         }
 696     }
 697
 698     for (ctx_node = contexts.next; ctx_node; ctx_node = ctx_node->next) {
 699         gcp_ctx_t* ctx = ctx_node->ctx;
 700         proto_item* ctx_item = proto_tree_add_uint(gcp_tree,ids->hf.ctx,gcp_tvb,0,0,ctx->id);
 701         proto_tree* ctx_tree = proto_item_add_subtree(ctx_item,ids->ett.ctx);
 702         gcp_terms_t *ctx_term;
 703
 704         PROTO_ITEM_SET_GENERATED(ctx_item);
 705
 706         if (ctx->cmds) {
 707             proto_item* history_item = proto_tree_add_text(ctx_tree,gcp_tvb,0,0,"[ Command History ]");
 708             proto_tree* history_tree = proto_item_add_subtree(history_item,ids->ett.ctx_cmds);
 709
 710             for (c = ctx->cmds; c; c = c->next) {
 711                 proto_item* cmd_item = proto_tree_add_uint(history_tree,ids->hf.ctx_cmd,gcp_tvb,0,0,c->cmd->msg->framenum);
 712                 if (c->cmd->str) proto_item_append_text(cmd_item,"  %s ",c->cmd->str);
 713                 PROTO_ITEM_SET_GENERATED(cmd_item);
 714                 if (c->cmd->error) {
 715                     proto_item_set_expert_flags(cmd_item, PI_RESPONSE_CODE, PI_WARN);
 716                 }
 717             }
 718         }
 719
 720         if (( ctx_term = ctx->terms.next )) {
 721             proto_item* terms_item = proto_tree_add_text(ctx_tree,gcp_tvb,0,0,"[ Terminations Used ]");
 722             proto_tree* terms_tree = proto_item_add_subtree(terms_item,ids->ett.ctx_terms);
 723
 724             for (; ctx_term; ctx_term = ctx_term->next ) {
 725                 if ( ctx_term->term && ctx_term->term->str) {
 726                     proto_item* pi = proto_tree_add_string(terms_tree,ids->hf.ctx_term,gcp_tvb,0,0,ctx_term->term->str);
 727                     proto_tree* term_tree = proto_item_add_subtree(pi,ids->ett.ctx_term);
 728
 729                     PROTO_ITEM_SET_GENERATED(pi);
 730
 731                     if (ctx_term->term->type) {
 732                         pi = proto_tree_add_uint(term_tree,ids->hf.ctx_term_type,gcp_tvb,0,0,ctx_term->term->type);
 733                         PROTO_ITEM_SET_GENERATED(pi);
 734                     }
 735
 736                     if (ctx_term->term->bir) {
 737                         pi = proto_tree_add_string(term_tree,ids->hf.ctx_term_bir,gcp_tvb,0,0,ctx_term->term->bir);
 738                         PROTO_ITEM_SET_GENERATED(pi);
 739                     }
 740
 741                     if (ctx_term->term->nsap) {
 742                         pi = proto_tree_add_string(term_tree,ids->hf.ctx_term_nsap,gcp_tvb,0,0,ctx_term->term->nsap);
 743                         PROTO_ITEM_SET_GENERATED(pi);
 744                     }
 745
 746                     if (ctx_term->term->bir && ctx_term->term->nsap) {
 747                         gchar* key = ep_strdup_printf("%s:%s",ctx_term->term->nsap,ctx_term->term->bir);
 748                         g_strdown(key);
 749                         alcap_tree_from_bearer_key(term_tree, gcp_tvb, key);
 750                     }
 751                 }
 752             }
 753         }
 754     }
 755 }