parser/parse_via.c
0fcc2741
 /*
22d4aa5d
  * $Id$ 
  *
  * via parsing automaton
  * 
7dd0b342
  *
  * Copyright (C) 2001-2003 Fhg Fokus
  *
  * This file is part of ser, a free SIP server.
  *
  * ser is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; either version 2 of the License, or
  * (at your option) any later version
  *
  * For a license to use the ser software under conditions
  * other than those described here, or to purchase support for this
  * software, please contact iptel.org by e-mail at the following addresses:
  *    info@iptel.org
  *
  * ser is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License 
  * along with this program; if not, write to the Free Software 
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
22d4aa5d
  */
 
7dd0b342
 
22d4aa5d
 
 /* 
09f7cd2c
  *  2003-01-21  added rport parsing code, contributed by
  *               Maxim Sobolev  <sobomax@FreeBSD.org>
  *  2003-01-23  added extra via param parsing code (i=...), used
  *               by tcp to identify the sending socket, by andrei
  *  2003-01-23  fixed rport parsing code to accept rport w/o any value,
  *               by andrei
51767629
  *  2003-01-27  modified parse_via to set new via_param->start member and
  *               via->params.s (andrei)
049f64c2
  *  2003-01-28  zero-terminations replaced with VIA_ZT (jiri)
42513578
  *  2003-02-28  scratchpad compatibility abandoned (jiri)
  *  2003-04-26  ZSW (jiri)
  *  2003-06-23  fixed  parse_via_param [op].* param. parsing bug (andrei)
62670078
  *  2003-07-02  added support for TLS parsing in via (andrei)
22d4aa5d
  */
 
 
 
049f64c2
 #include "../comp_defs.h"
22d4aa5d
 #include <stdlib.h>
e22bbdb8
 #include <string.h>
3881f12c
 #include "../dprint.h"
 #include "../ut.h"
 #include "../mem/mem.h"
f2f969dd
 #include "../ip_addr.h"
2bb60634
 #include "parse_via.h"
 #include "parse_def.h"
22d4aa5d
 
 
 
 /* main via states (uri:port ...) */
2bb60634
 enum {	         
 	F_HOST, P_HOST,
 	L_PORT, F_PORT, P_PORT,
 	L_PARAM, F_PARAM, P_PARAM,
 	L_VIA, F_VIA,
 	F_COMMENT, P_COMMENT,
785c78c3
 	F_IP6HOST, P_IP6HOST, 
2bb60634
 	F_CRLF,
 	F_LF,
 	F_CR,
 	END_OF_HEADER
 };
 
22d4aa5d
 
 /* first via part state */
2bb60634
 enum {
 	F_SIP = 100,
 	SIP1, SIP2, FIN_SIP,
 	L_VER, F_VER,
 	VER1, VER2, FIN_VER,
f2f969dd
 	UDP1, UDP2, FIN_UDP,
62670078
 	TCP_TLS1, TCP2, FIN_TCP,
 	          TLS2, FIN_TLS,
f2f969dd
 	L_PROTO, F_PROTO
2bb60634
 };
 
22d4aa5d
 
89e74c57
 /* param related states
09f7cd2c
  * WARNING: keep in sync with parse_via.h, PARAM_HIDDEN, ...
  */
2bb60634
 enum {	
 	L_VALUE = 200, F_VALUE, P_VALUE, P_STRING,
 	HIDDEN1, HIDDEN2, HIDDEN3, HIDDEN4, HIDDEN5,
 	TTL1, TTL2,
 	BRANCH1, BRANCH2, BRANCH3, BRANCH4, BRANCH5,
 	MADDR1, MADDR2, MADDR3, MADDR4,
 	RECEIVED1, RECEIVED2, RECEIVED3, RECEIVED4, RECEIVED5, RECEIVED6,
 	RECEIVED7,
09f7cd2c
 	RPORT1, RPORT2, RPORT3,
2bb60634
 	     /* fin states (227-...)*/
 	FIN_HIDDEN = 230, FIN_TTL, FIN_BRANCH, FIN_MADDR, FIN_RECEIVED,
09f7cd2c
 	FIN_RPORT, FIN_I
2bb60634
 	     /*GEN_PARAM,
 	       PARAM_ERROR*/ /* declared in msg_parser.h*/
 };
22d4aa5d
 
 
0fcc2741
 /* entry state must be F_PARAM, or saved_state=F_PARAM and
22d4aa5d
  * state=F_{LF,CR,CRLF}!
0fcc2741
  * output state = L_PARAM or F_PARAM or END_OF_HEADER
2bb60634
  * (and saved_state= last state); everything else => error 
51767629
  * WARNING: param->start must be filled before, it's used in param->size 
  * computation.
2bb60634
  */
f2f969dd
 static /*inline*/ char* parse_via_param(char* p, char* end,
 										unsigned char* pstate, 
 				    					unsigned char* psaved_state,
 										struct via_param* param)
22d4aa5d
 {
 	char* tmp;
f2f969dd
 	register unsigned char state;
 	unsigned char saved_state;
0fcc2741
 
22d4aa5d
 	state=*pstate;
 	saved_state=*psaved_state;
89e74c57
 	param->type=PARAM_ERROR;
0fcc2741
 
22d4aa5d
 	for (tmp=p;tmp<end;tmp++){
 		switch(*tmp){
 			case ' ':
 			case '\t':
 				switch(state){
 					case FIN_HIDDEN:
89e74c57
 						param->type=state;
 						param->name.len=tmp-param->name.s;
22d4aa5d
 						state=L_PARAM;
 						goto endofparam;
 					case FIN_BRANCH:
 					case FIN_TTL:
 					case FIN_MADDR:
 					case FIN_RECEIVED:
09f7cd2c
 					case FIN_RPORT:
 					case FIN_I:
89e74c57
 						param->type=state;
 						param->name.len=tmp-param->name.s;
22d4aa5d
 						state=L_VALUE;
 						goto find_value;
 					case F_PARAM:
 						break;
 					case F_LF:
 					case F_CR:
 					case F_CRLF:
 						state=saved_state;
 						break;
 					case GEN_PARAM:
 					default:
89e74c57
 						param->type=GEN_PARAM;
 						param->name.len=tmp-param->name.s;
22d4aa5d
 						state=L_VALUE;
 						goto find_value;
 				}
 				break;
 			/* \n and \r*/
 			case '\n':
 				switch(state){
 					case FIN_HIDDEN:
89e74c57
 						param->type=state;
 						param->name.len=tmp-param->name.s;
51767629
 						param->size=tmp-param->start; 
22d4aa5d
 						saved_state=L_PARAM;
 						state=F_LF;
 						goto endofparam;
 					case FIN_BRANCH:
 					case FIN_TTL:
 					case FIN_MADDR:
 					case FIN_RECEIVED:
09f7cd2c
 					case FIN_I:
51767629
 					case FIN_RPORT:
89e74c57
 						param->type=state;
 						param->name.len=tmp-param->name.s;
51767629
 						param->size=tmp-param->start; 
22d4aa5d
 						saved_state=L_VALUE;
 						state=F_LF;
 						goto find_value;
 					case F_PARAM:
 						saved_state=state;
 						state=F_LF;
 						break;
 					case F_LF:
 					case F_CRLF:
 						state=END_OF_HEADER;
 						goto end_via;
 					case F_CR:
 						state=F_CRLF;
 						break;
 					case GEN_PARAM:
 					default:
89e74c57
 						param->type=GEN_PARAM;
22d4aa5d
 						saved_state=L_VALUE;
89e74c57
 						param->name.len=tmp-param->name.s;
51767629
 						param->size=tmp-param->start; 
22d4aa5d
 						state=F_LF;
 						goto find_value;
 				}
 				break;
 			case '\r':
 				switch(state){
 					case FIN_HIDDEN:
89e74c57
 						param->type=state;
 						param->name.len=tmp-param->name.s;
51767629
 						param->size=tmp-param->start; 
22d4aa5d
 						saved_state=L_PARAM;
 						state=F_CR;
 						goto endofparam;
 					case FIN_BRANCH:
 					case FIN_TTL:
 					case FIN_MADDR:
 					case FIN_RECEIVED:
09f7cd2c
 					case FIN_I:
51767629
 					case FIN_RPORT:
89e74c57
 						param->type=state;
 						param->name.len=tmp-param->name.s;
51767629
 						param->size=tmp-param->start; 
22d4aa5d
 						saved_state=L_VALUE;
 						state=F_CR;
 						goto find_value;
 					case F_PARAM:
 						saved_state=state;
 						state=F_CR;
 						break;
 					case F_CR:
 					case F_CRLF:
 						state=END_OF_HEADER;
 						goto end_via;
 					case GEN_PARAM:
 					default:
89e74c57
 						param->type=GEN_PARAM;
 						param->name.len=tmp-param->name.s;
51767629
 						param->size=tmp-param->start; 
22d4aa5d
 						saved_state=L_VALUE;
 						state=F_CR;
 						goto find_value;
 				}
 				break;
 
 			case '=':
 				switch(state){
 					case FIN_BRANCH:
 					case FIN_TTL:
 					case FIN_MADDR:
 					case FIN_RECEIVED:
09f7cd2c
 					case FIN_RPORT:
 					case FIN_I:
89e74c57
 						param->type=state;
 						param->name.len=tmp-param->name.s;
22d4aa5d
 						state=F_VALUE;
 						goto find_value;
 					case F_PARAM:
 					case FIN_HIDDEN:
 						LOG(L_ERR, "ERROR: parse_via: invalid char <%c> in"
e22bbdb8
 								" state %d\n", *tmp, state);
22d4aa5d
 						goto error;
 					case F_CR:
 					case F_LF:
 					case F_CRLF:
 						state=END_OF_HEADER;
 						goto end_via;
 					case GEN_PARAM:
 					default:
89e74c57
 						param->type=GEN_PARAM;
 						param->name.len=tmp-param->name.s;
22d4aa5d
 						state=F_VALUE;
 						goto find_value;
 				}
 				break;
 			case ';':
 				switch(state){
 					case FIN_HIDDEN:
09f7cd2c
 					case FIN_RPORT: /* rport can appear w/o a value */
89e74c57
 						param->type=state;
 						param->name.len=tmp-param->name.s;
22d4aa5d
 						state=F_PARAM;
 						goto endofparam;
 					case FIN_BRANCH:
 					case FIN_MADDR:
 					case FIN_TTL:
 					case FIN_RECEIVED:
09f7cd2c
 					case FIN_I:
22d4aa5d
 						LOG(L_ERR, "ERROR: parse_via: invalid char <%c> in"
e22bbdb8
 								" state %d\n", *tmp, state);
22d4aa5d
 						goto error;
 					case F_CR:
 					case F_LF:
 					case F_CRLF:
 						state=END_OF_HEADER;
 						goto end_via;
 					case GEN_PARAM:
 					default:
89e74c57
 						param->type=GEN_PARAM;
 						param->name.len=tmp-param->name.s;
22d4aa5d
 						state=F_PARAM;
 						goto endofparam;
 				}
 				break;
9d81cbd6
 			case ',':
 				switch(state){
 					case FIN_HIDDEN:
09f7cd2c
 					case FIN_RPORT:
9d81cbd6
 						param->type=state;
 						param->name.len=tmp-param->name.s;
 						state=F_VIA;
 						goto endofvalue;
 					case FIN_BRANCH:
 					case FIN_MADDR:
 					case FIN_TTL:
 					case FIN_RECEIVED:
09f7cd2c
 					case FIN_I:
9d81cbd6
 						LOG(L_ERR, "ERROR: parse_via_param: new via found" 
 								"(',') when '=' expected (state %d=)\n",
 								state);
 						goto error; /* or we could ignore this bad param*/
 					case F_CR:
 					case F_LF:
 					case F_CRLF:
 						state=END_OF_HEADER;
 						goto end_via;
 					case GEN_PARAM:
 					default:
 						param->type=GEN_PARAM;
 						param->name.len=tmp-param->name.s;
 						state=F_VIA;
 						goto endofvalue;
 				}
 				break; 
0fcc2741
 
22d4aa5d
 				/* param names */
 			case 'h':
 			case 'H':
 				switch(state){
 					case F_PARAM:
 						state=HIDDEN1;
89e74c57
 						param->name.s=tmp;
22d4aa5d
 						break;
eaf48c3f
 					case BRANCH5:
 						state=FIN_BRANCH;
 						break;
22d4aa5d
 					case GEN_PARAM:
 						break;
 					case F_CR:
 					case F_LF:
 					case F_CRLF:
 						state=END_OF_HEADER;
 						goto end_via;
 					default:
 						state=GEN_PARAM;
 				}
 				break;
 			case 'i':
 			case 'I':
 				switch(state){
89e74c57
 					case F_PARAM:
09f7cd2c
 						state=FIN_I;
89e74c57
 						param->name.s=tmp;
 						break;
22d4aa5d
 					case HIDDEN1:
 						state=HIDDEN2;
 						break;
 					case RECEIVED4:
 						state=RECEIVED5;
 						break;
 					case GEN_PARAM:
 						break;
 					case F_CR:
 					case F_LF:
 					case F_CRLF:
 						state=END_OF_HEADER;
 						goto end_via;
 					default:
 						state=GEN_PARAM;
 				}
 				break;
 			case 'd':
 			case 'D':
 				switch(state){
89e74c57
 					case F_PARAM:
 						state=GEN_PARAM;
 						param->name.s=tmp;
 						break;
22d4aa5d
 					case HIDDEN2:
 						state=HIDDEN3;
 						break;
 					case HIDDEN3:
 						state=HIDDEN4;
 						break;
 					case MADDR2:
 						state=MADDR3;
 						break;
 					case MADDR3:
 						state=MADDR4;
 						break;
 					case RECEIVED7:
 						state=FIN_RECEIVED;
 						break;
 					case GEN_PARAM:
 						break;
 					case F_CR:
 					case F_LF:
 					case F_CRLF:
 						state=END_OF_HEADER;
 						goto end_via;
 					default:
 						state=GEN_PARAM;
 				}
 				break;
 			case 'e':
 			case 'E':
 				switch(state){
89e74c57
 					case F_PARAM:
 						state=GEN_PARAM;
 						param->name.s=tmp;
 						break;
22d4aa5d
 					case HIDDEN4:
 						state=HIDDEN5;
 						break;
 					case RECEIVED1:
 						state=RECEIVED2;
 						break;
 					case RECEIVED3:
 						state=RECEIVED4;
 						break;
 					case RECEIVED6:
 						state=RECEIVED7;
 						break;
 					case GEN_PARAM:
 						break;
 					case F_CR:
 					case F_LF:
 					case F_CRLF:
 						state=END_OF_HEADER;
 						goto end_via;
 					default:
 						state=GEN_PARAM;
 				}
 				break;
 			case 'n':
 			case 'N':
 				switch(state){
89e74c57
 					case F_PARAM:
 						state=GEN_PARAM;
 						param->name.s=tmp;
 						break;
22d4aa5d
 					case HIDDEN5:
 						state=FIN_HIDDEN;
 						break;
 					case BRANCH3:
 						state=BRANCH4;
 						break;
 					case GEN_PARAM:
 						break;
 					case F_CR:
 					case F_LF:
 					case F_CRLF:
 						state=END_OF_HEADER;
 						goto end_via;
 					default:
 						state=GEN_PARAM;
 				}
 				break;
 			case 't':
 			case 'T':
 				switch(state){
 					case F_PARAM:
 						state=TTL1;
89e74c57
 						param->name.s=tmp;
22d4aa5d
 						break;
 					case TTL1:
 						state=TTL2;
 						break;
09f7cd2c
 					case RPORT3:
 						state=FIN_RPORT;
 						break;
22d4aa5d
 					case GEN_PARAM:
 						break;
 					case F_CR:
 					case F_LF:
 					case F_CRLF:
 						state=END_OF_HEADER;
 						goto end_via;
 					default:
 						state=GEN_PARAM;
 				}
 				break;
 			case 'l':
 			case 'L':
 				switch(state){
89e74c57
 					case F_PARAM:
 						state=GEN_PARAM;
 						param->name.s=tmp;
 						break;
22d4aa5d
 					case TTL2:
 						state=FIN_TTL;
 						break;
 					case GEN_PARAM:
 						break;
 					case F_CR:
 					case F_LF:
 					case F_CRLF:
 						state=END_OF_HEADER;
 						goto end_via;
 					default:
 						state=GEN_PARAM;
 				}
 				break;
 			case 'm':
 			case 'M':
 				switch(state){
 					case F_PARAM:
 						state=MADDR1;
89e74c57
 						param->name.s=tmp;
22d4aa5d
 						break;
 					case GEN_PARAM:
 						break;
 					case F_CR:
 					case F_LF:
 					case F_CRLF:
 						state=END_OF_HEADER;
 						goto end_via;
 					default:
 						state=GEN_PARAM;
 				}
 				break;
 			case 'a':
 			case 'A':
 				switch(state){
89e74c57
 					case F_PARAM:
 						state=GEN_PARAM;
 						param->name.s=tmp;
 						break;
22d4aa5d
 					case MADDR1:
 						state=MADDR2;
 						break;
 					case BRANCH2:
 						state=BRANCH3;
 						break;
 					case GEN_PARAM:
 						break;
 					case F_CR:
 					case F_LF:
 					case F_CRLF:
 						state=END_OF_HEADER;
 						goto end_via;
 					default:
 						state=GEN_PARAM;
 				}
 				break;
 			case 'r':
 			case 'R':
 				switch(state){
 					case MADDR4:
 						state=FIN_MADDR;
 						break;
 					case F_PARAM:
 						state=RECEIVED1;
89e74c57
 						param->name.s=tmp;
22d4aa5d
 						break;
 					case BRANCH1:
 						state=BRANCH2;
 						break;
09f7cd2c
 					case RPORT2:
 						state=RPORT3;
 						break;
22d4aa5d
 					case GEN_PARAM:
 						break;
 					case F_CR:
 					case F_LF:
 					case F_CRLF:
 						state=END_OF_HEADER;
 						goto end_via;
 					default:
 						state=GEN_PARAM;
 				}
 				break;
 			case 'c':
 			case 'C':
 				switch(state){
89e74c57
 					case F_PARAM:
 						state=GEN_PARAM;
 						param->name.s=tmp;
 						break;
22d4aa5d
 					case RECEIVED2:
 						state=RECEIVED3;
 						break;
 					case BRANCH4:
 						state=BRANCH5;
 						break;
 					case GEN_PARAM:
 						break;
 					case F_CR:
 					case F_LF:
 					case F_CRLF:
 						state=END_OF_HEADER;
 						goto end_via;
 					default:
 						state=GEN_PARAM;
 				}
 				break;
 			case 'v':
 			case 'V':
 				switch(state){
89e74c57
 					case F_PARAM:
 						state=GEN_PARAM;
 						param->name.s=tmp;
 						break;
22d4aa5d
 					case RECEIVED5:
 						state=RECEIVED6;
 						break;
 					case GEN_PARAM:
 						break;
 					case F_CR:
 					case F_LF:
 					case F_CRLF:
 						state=END_OF_HEADER;
 						goto end_via;
 					default:
 						state=GEN_PARAM;
 				}
 				break;
 			case 'b':
 			case 'B':
 				switch(state){
 					case F_PARAM:
 						state=BRANCH1;
89e74c57
 						param->name.s=tmp;
22d4aa5d
 						break;
 					case GEN_PARAM:
 						break;
 					case F_CR:
 					case F_LF:
 					case F_CRLF:
 						state=END_OF_HEADER;
 						goto end_via;
 					default:
 						state=GEN_PARAM;
 				}
 				break;
09f7cd2c
 			case 'p':
 			case 'P':
 				switch(state){
42513578
 					case F_PARAM:
 						state=GEN_PARAM;
 						param->name.s=tmp;
 						break;
09f7cd2c
 					case RECEIVED1:
 						state=RPORT1;
 						break;
 					case F_CR:
 					case F_LF:
 					case F_CRLF:
 						state=END_OF_HEADER;
 						goto end_via;
 					default:
 						state=GEN_PARAM;
 				}
 				break;
 			case 'o':
 			case 'O':
 				switch(state){
42513578
 					case F_PARAM:
 						state=GEN_PARAM;
 						param->name.s=tmp;
 						break;
09f7cd2c
 					case RPORT1:
 						state=RPORT2;
 						break;
 					case F_CR:
 					case F_LF:
 					case F_CRLF:
 						state=END_OF_HEADER;
 						goto end_via;
 					default:
 						state=GEN_PARAM;
 				}
 				break;
22d4aa5d
 			default:
 				switch(state){
 					case F_PARAM:
 						state=GEN_PARAM;
89e74c57
 						param->name.s=tmp;
22d4aa5d
 						break;
09f7cd2c
 					case GEN_PARAM:
22d4aa5d
 						break;
 					case F_CR:
 					case F_LF:
 					case F_CRLF:
 						state=END_OF_HEADER;
 						goto end_via;
 					default:
 						state=GEN_PARAM;
 				}
 		}
 	}/* for tmp*/
 
2bb60634
 	/* end of packet? => error, no cr/lf,',' found!!!*/
 	saved_state=state;
 	state=END_OF_HEADER;
 	goto error;
 	
  find_value:
22d4aa5d
 	tmp++;
e22bbdb8
 	for(;*tmp;tmp++){
22d4aa5d
 		switch(*tmp){
 			case ' ':
 			case '\t':
 				switch(state){
 					case L_VALUE:
 					case F_VALUE: /*eat space*/
 						break; 
 					case P_VALUE:
 						state=L_PARAM;
89e74c57
 						param->value.len=tmp-param->value.s;
22d4aa5d
 						goto endofvalue;
 					case P_STRING:
 						break;
 					case F_CR:
 					case F_LF:
 					case F_CRLF:
 						state=saved_state;
 						break;
 					default:
 						LOG(L_ERR, "ERROR: parse_via: invalid char <%c>"
e22bbdb8
 								" in state %d\n", *tmp, state);
22d4aa5d
 						goto error;
 				}
 				break;
 			case '\n':
 				switch(state){
 					case L_VALUE:
 					case F_VALUE: /*eat space*/
 					case P_STRING:
 						saved_state=state;
51767629
 						param->size=tmp-param->start;
22d4aa5d
 						state=F_LF;
0fcc2741
 						break;
22d4aa5d
 					case P_VALUE:
 						saved_state=L_PARAM;
 						state=F_LF;
89e74c57
 						param->value.len=tmp-param->value.s;
22d4aa5d
 						goto endofvalue;
 					case F_LF:
 					case F_CRLF:
 						state=END_OF_HEADER;
 						goto end_via;
 					case F_CR:
 						state=F_CRLF;
 						break;
 					default:
 						LOG(L_ERR, "ERROR: parse_via: invalid char <%c>"
e22bbdb8
 								" in state %d\n", *tmp, state);
22d4aa5d
 						goto error;
 				}
 				break;
 			case '\r':
 				switch(state){
 					case L_VALUE:
 					case F_VALUE: /*eat space*/
 					case P_STRING:
 						saved_state=state;
51767629
 						param->size=tmp-param->start;
22d4aa5d
 						state=F_CR;
0fcc2741
 						break;
22d4aa5d
 					case P_VALUE:
89e74c57
 						param->value.len=tmp-param->value.s;
22d4aa5d
 						saved_state=L_PARAM;
 						state=F_CR;
 						goto endofvalue;
 					case F_LF:
 					case F_CR:
 					case F_CRLF:
 						state=END_OF_HEADER;
 						goto end_via;
 					default:
 						LOG(L_ERR, "ERROR: parse_via: invalid char <%c>"
e22bbdb8
 								" in state %d\n", *tmp, state);
22d4aa5d
 						goto error;
 				}
 				break;
 
 			case '=':
 				switch(state){
 					case L_VALUE:
 						state=F_VALUE;
 						break;
 					case P_STRING:
 						break;
 					case F_LF:
 					case F_CR:
 					case F_CRLF:
 						state=END_OF_HEADER;
 						goto end_via;
 					default:
 						LOG(L_ERR, "ERROR: parse_via: invalid char <%c>"
e22bbdb8
 								" in state %d\n", *tmp, state);
22d4aa5d
 						goto error;
 				}
 				break;
 			case ';':
 				switch(state){
 					case P_VALUE:
89e74c57
 						param->value.len=tmp-param->value.s;
22d4aa5d
 						state=F_PARAM;
 						goto endofvalue;
09f7cd2c
 					case F_VALUE:
 						param->value.len=0;
 						state=F_PARAM;
 						goto endofvalue;
22d4aa5d
 					case P_STRING:
 						break; /* what to do? */
 					case F_LF:
 					case F_CR:
 					case F_CRLF:
 						state=END_OF_HEADER;
 						goto end_via;
09f7cd2c
 					case L_VALUE:
 						if (param->type==FIN_RPORT){
 							param->value.len=0;
 							param->value.s=0; /* null value */
 							state=F_PARAM;
 							goto endofvalue;
 						};
 						/* no break */
22d4aa5d
 					default:
 						LOG(L_ERR, "ERROR: parse_via: invalid char <%c>"
e22bbdb8
 								" in state %d\n", *tmp, state);
22d4aa5d
 						goto error;
 				}
 				break;
490ff008
 			case ',':
 				switch(state){
 					case P_VALUE:
 						param->value.len=tmp-param->value.s;
 						state=F_VIA;
 						goto endofvalue;
 					case P_STRING:
09f7cd2c
 					case F_LF:
490ff008
 					case F_CR:
 					case F_CRLF:
 						state=END_OF_HEADER;
 						goto end_via;
09f7cd2c
 					case L_VALUE:
 						if (param->type==FIN_RPORT){
 							param->value.len=0;
 							param->value.s=0; /* null value */
 							state=F_VIA;
 							goto endofvalue;
 						};
 						/* no break */
490ff008
 					default:
 						LOG(L_ERR, "ERROR: parse_via: invalid char <%c>"
e22bbdb8
 								" in state %d\n", *tmp, state);
490ff008
 						goto error;
 				}
 				break; /* what to do? */
22d4aa5d
 			case '"':
 				switch(state){
 					case F_VALUE:
 						state=P_STRING;
89e74c57
 						param->value.s=tmp+1;
22d4aa5d
 						break;
 					case P_STRING:
 						state=L_PARAM;
89e74c57
 						param->value.len=tmp-param->value.s;
22d4aa5d
 						goto endofvalue;
 					case F_LF:
 					case F_CR:
 					case F_CRLF:
 						state=END_OF_HEADER;
 						goto end_via;
 					default:
 						LOG(L_ERR, "ERROR: parse_via: invalid char <%c>"
e22bbdb8
 								" in state %d\n", *tmp, state);
22d4aa5d
 						goto error;
 				}
 				break;
 			default:
 				switch(state){
 					case F_VALUE:
 						state=P_VALUE;
89e74c57
 						param->value.s=tmp;
22d4aa5d
 						break;
 					case P_VALUE:
 					case P_STRING:
 						break;
 					case F_LF:
 					case F_CR:
 					case F_CRLF:
 						state=END_OF_HEADER;
 						goto end_via;
 					default:
 						LOG(L_ERR, "ERROR: parse_via: invalid char <%c>"
e22bbdb8
 								" in state %d\n", *tmp, state);
22d4aa5d
 						goto error;
 				}
 		}
 	} /* for2 tmp*/
 
89e74c57
 	/* end of buff and no CR/LF =>error*/
2bb60634
 	saved_state=state;
 	state=END_OF_HEADER;
 	goto error;
 	
  endofparam:
  endofvalue:
51767629
 	param->size=tmp-param->start;
 normal_exit:
22d4aa5d
 	*pstate=state;
 	*psaved_state=saved_state;
049f64c2
 	DBG("Found param type %d, <%.*s> = <%.*s>; state=%d\n", param->type,
6b6f226f
 			param->name.len, ZSW(param->name.s), 
6419a43f
 			(param->value.len?param->value.len:3),
 			(param->value.len?param->value.s:"n/a"), state);
22d4aa5d
 	return tmp;
2bb60634
 	
  end_via:
 	     /* if we are here we found an "unexpected" end of via
09f7cd2c
 	      *  (cr/lf). This is valid only if the param type is GEN_PARAM or
 		  *  RPORT (the only ones which can miss the value; HIDDEN is a 
 		  *  special case )*/
 	if ((param->type==GEN_PARAM)||(param->type==PARAM_RPORT)){
6b0c00a0
 		saved_state=L_PARAM; /* change the saved_state, we have an unknown
 		                        param. w/o a value */
51767629
 		/* param->size should be computed before */
 		goto normal_exit;
6b0c00a0
 	}
22d4aa5d
 	*pstate=state;
 	*psaved_state=saved_state;
049f64c2
 	DBG("Error on  param type %d, <%.*s>, state=%d, saved_state=%d\n",
6b6f226f
 		param->type, param->name.len, ZSW(param->name.s), state, saved_state);
89e74c57
 
2bb60634
  error:
89e74c57
 	LOG(L_ERR, "error: parse_via_param\n");
 	param->type=PARAM_ERROR;
 	*pstate=PARAM_ERROR;
 	*psaved_state=state;
22d4aa5d
 	return tmp;
 }
 
 
 
 char* parse_via(char* buffer, char* end, struct via_body *vb)
 {
 	char* tmp;
51767629
 	char* param_start;
f2f969dd
 	unsigned char state;
 	unsigned char saved_state;
22d4aa5d
 	int c_nest;
 	int err;
 
89e74c57
 	struct via_param* param;
22d4aa5d
 
 parse_again:
34af87af
 	vb->error=PARSE_ERROR;
22d4aa5d
 	/* parse start of via ( SIP/2.0/UDP    )*/
 	state=F_SIP;
51767629
 	param_start=0;
22d4aa5d
 	for(tmp=buffer;tmp<end;tmp++){
 		switch(*tmp){
 			case ' ':
 			case'\t':
 				switch(state){
 					case L_VER: /* eat space */
 					case L_PROTO:
 					case F_SIP:
 					case F_VER:
 					case F_PROTO:
 						break;
f2f969dd
 					case FIN_UDP:
22d4aa5d
 						vb->transport.len=tmp-vb->transport.s;
f2f969dd
 						vb->proto=PROTO_UDP;
 						state=F_HOST; /* start looking for host*/
 						goto main_via;
 					case FIN_TCP:
18dbc018
 						/* finished proto parsing */
f2f969dd
 						vb->transport.len=tmp-vb->transport.s;
 						vb->proto=PROTO_TCP;
22d4aa5d
 						state=F_HOST; /* start looking for host*/
 						goto main_via;
62670078
 					case FIN_TLS:
 						/* finished proto parsing */
 						vb->transport.len=tmp-vb->transport.s;
 						vb->proto=PROTO_TLS;
 						state=F_HOST; /* start looking for host*/
 						goto main_via;
22d4aa5d
 					case FIN_SIP:
 						vb->name.len=tmp-vb->name.s;
 						state=L_VER;
 						break;
 					case FIN_VER:
 						vb->version.len=tmp-vb->version.s;
 						state=L_PROTO;
 						break;
 					case F_LF:
 					case F_CRLF:
 					case F_CR: /* header continues on this line */
 						state=saved_state;
 						break;
 					default:
 						LOG(L_ERR, "ERROR: parse_via: bad char <%c> on"
 								" state %d\n", *tmp, state);
 						goto error;
 				}
 				break;
 			case '\n':
 				switch(state){
 					case L_VER:
 					case F_SIP:
 					case F_VER:
 					case F_PROTO:
 					case L_PROTO:
 						saved_state=state;
 						state=F_LF;
 						break;
f2f969dd
 					case FIN_UDP:
 						vb->transport.len=tmp-vb->transport.s;
 						vb->proto=PROTO_UDP;
 						state=F_LF;
 						saved_state=F_HOST; /* start looking for host*/
 						goto main_via;
 					case FIN_TCP:
22d4aa5d
 						vb->transport.len=tmp-vb->transport.s;
f2f969dd
 						vb->proto=PROTO_TCP;
22d4aa5d
 						state=F_LF;
 						saved_state=F_HOST; /* start looking for host*/
 						goto main_via;
62670078
 					case FIN_TLS:
 						vb->transport.len=tmp-vb->transport.s;
 						vb->proto=PROTO_TLS;
 						state=F_LF;
 						saved_state=F_HOST; /* start looking for host*/
 						goto main_via;
22d4aa5d
 					case FIN_SIP:
 						vb->name.len=tmp-vb->name.s;
 						state=F_LF;
 						saved_state=L_VER;
 						break;
 					case FIN_VER:
 						vb->version.len=tmp-vb->version.s;
 						state=F_LF;
 						saved_state=L_PROTO;
 						break;
 					case F_CR:
 						state=F_CRLF;
 						break;
 					case F_LF:
 					case F_CRLF:
 						state=saved_state;
 						goto endofheader;
 					default:
 						LOG(L_ERR, "ERROR: parse_via: bad char <%c> on"
 								" state %d\n", *tmp, state);
 						goto error;
 				}
 				break;
 			case '\r':
 				switch(state){
 					case L_VER:
 					case F_SIP:
 					case F_VER:
 					case F_PROTO:
 					case L_PROTO:
 						saved_state=state;
 						state=F_CR;
 						break;
f2f969dd
 					case FIN_UDP:
22d4aa5d
 						vb->transport.len=tmp-vb->transport.s;
f2f969dd
 						vb->proto=PROTO_UDP;
 						state=F_CR;
 						saved_state=F_HOST;
 						goto main_via;
 					case FIN_TCP:
 						vb->transport.len=tmp-vb->transport.s;
 						vb->proto=PROTO_TCP;
22d4aa5d
 						state=F_CR;
 						saved_state=F_HOST;
 						goto main_via;
62670078
 					case FIN_TLS:
 						vb->transport.len=tmp-vb->transport.s;
 						vb->proto=PROTO_TLS;
 						state=F_CR;
 						saved_state=F_HOST;
 						goto main_via;
22d4aa5d
 					case FIN_SIP:
 						vb->name.len=tmp-vb->name.s;
 						state=F_CR;
 						saved_state=L_VER;
 						break;
 					case FIN_VER:
 						vb->version.len=tmp-vb->version.s;
 						state=F_CR;
 						saved_state=L_PROTO;
 						break;
 					case F_LF: /*end of line ?next header?*/
 					case F_CR:
 					case F_CRLF:
 						state=saved_state;
 						goto endofheader;
 					default:
 						LOG(L_ERR, "ERROR: parse_via: bad char <%c> on"
 								" state %d\n", *tmp, state);
 						goto error;
 				}
 				break;
 			
 			case '/':
 				switch(state){
 					case FIN_SIP:
 						vb->name.len=tmp-vb->name.s;
 						state=F_VER;
 						break;
 					case FIN_VER:
 						vb->version.len=tmp-vb->version.s;
 						state=F_PROTO;
 						break;
 					case L_VER:
 						state=F_VER;
 						break;
 					case L_PROTO:
 						state=F_PROTO;
 						break;
 					default:
 						LOG(L_ERR, "ERROR: parse_via: bad char <%c> on"
 								" state %d\n", *tmp, state);
 						goto error;
 				}
 				break;
 				/* match SIP*/
 			case 'S':
 			case 's':
 				switch(state){
 					case F_SIP:
 						state=SIP1;
 						vb->name.s=tmp;
 						break;
62670078
 					case TLS2:
 						state=FIN_TLS;
 						break;
22d4aa5d
 					default:
 						LOG(L_ERR, "ERROR: parse_via: bad char <%c> on"
 								" state %d\n", *tmp, state);
 						goto error;
 				}
 				break;
 			case 'I':
 			case 'i':
 				switch(state){
 					case SIP1:
 						state=SIP2;
 						break;
 					default:
 						LOG(L_ERR, "ERROR: parse_via: bad char <%c> on"
 								" state %d\n", *tmp, state);
 						goto error;
 				}
 				break;
 			case 'p':
 			case 'P':
 				switch(state){
 					case SIP2:
 						state=FIN_SIP;
 						break;
 					/* allow p in PROTO */
f2f969dd
 					case UDP2:
 						state=FIN_UDP;
 						break;
 					case TCP2:
 						state=FIN_TCP;
 						break;
 					default:
 						LOG(L_ERR, "ERROR: parse_via: bad char <%c> on"
 								" state %d\n", *tmp, state);
 						goto error;
 				}
 				break;
 			case 'U':
 			case 'u':
 				switch(state){
 					case F_PROTO:
 						state=UDP1;
09f7cd2c
 						vb->transport.s=tmp;
f2f969dd
 						break;
 					default:
 						LOG(L_ERR, "ERROR: parse_via: bad char <%c> on"
 								" state %d\n", *tmp, state);
 						goto error;
 				}
 				break;
 			case 'D':
 			case 'd':
 				switch(state){
 					case UDP1:
 						state=UDP2;
 						break;
 					default:
 						LOG(L_ERR, "ERROR: parse_via: bad char <%c> on"
 								" state %d\n", *tmp, state);
 						goto error;
 				}
 				break;
 			case 'T':
 			case 't':
 				switch(state){
22d4aa5d
 					case F_PROTO:
62670078
 						state=TCP_TLS1;
09f7cd2c
 						vb->transport.s=tmp;
22d4aa5d
 						break;
f2f969dd
 					default:
 						LOG(L_ERR, "ERROR: parse_via: bad char <%c> on"
 								" state %d\n", *tmp, state);
 						goto error;
 				}
 				break;
 			case 'C':
 			case 'c':
 				switch(state){
62670078
 					case TCP_TLS1:
f2f969dd
 						state=TCP2;
22d4aa5d
 						break;
 					default:
 						LOG(L_ERR, "ERROR: parse_via: bad char <%c> on"
62670078
 								" state %d\n", *tmp, state);
 						goto error;
 				}
 				break;
 			case 'L':
 			case 'l':
 				switch(state){
 					case TCP_TLS1:
 						state=TLS2;
 						break;
 					default:
 						LOG(L_ERR, "ERROR: parse_via: bad char <%c> on"
22d4aa5d
 								" state %d\n", *tmp, state);
 						goto error;
 				}
 				break;
 			/*match 2.0*/
 			case '2':
 				switch(state){
 					case F_VER:
 						state=VER1;
 						vb->version.s=tmp;
 						break;
 					default:
 						LOG(L_ERR, "ERROR: parse_via: bad char <%c> on"
 								" state %d\n", *tmp, state);
 						goto error;
 				}
 				break;
 			case '.':
 				switch(state){
 					case VER1:
 						state=VER2;
 						break;
 					default:
 						LOG(L_ERR, "ERROR: parse_via: bad char <%c> on"
 								" state %d\n", *tmp, state);
 						goto error;
 				}
 				 break;
 			case '0':
 				switch(state){
 					case VER2:
 						state=FIN_VER;
 						break;
 					default:
 						LOG(L_ERR, "ERROR: parse_via: bad char <%c> on"
 								" state %d\n", *tmp, state);
 						goto error;
 				}
 				break;
 			
 			default:
 						LOG(L_ERR, "ERROR: parse_via: bad char <%c> on"
 								" state %d\n", *tmp, state);
 						goto error;
 				break;
 		}
 	} /* for tmp*/
 
2bb60634
 	/* we should not be here! if everything is ok > main_via*/
22d4aa5d
 	LOG(L_ERR, "ERROR: parse_via: bad via: end of packet on state=%d\n",
 			state);
 	goto error;
 
2bb60634
  main_via:
 	/* inc tmp to point to the next char*/
22d4aa5d
 	tmp++;
 	c_nest=0;
 	/*state should always be F_HOST here*/;
 	for(;*tmp;tmp++){
 		switch(*tmp){
2bb60634
 		case ' ':
 		case '\t':
 			switch(state){
22d4aa5d
 					case F_HOST:/*eat the spaces*/
 						break;
 					case P_HOST:
18dbc018
 						 /*mark end of host*/
22d4aa5d
 						 vb->host.len=tmp-vb->host.s;
 						 state=L_PORT;
 						 break;
 					case L_PORT: /*eat the spaces*/
 					case F_PORT:
 						break;
 					case P_PORT:
18dbc018
 						/*end of port */
22d4aa5d
 						vb->port_str.len=tmp-vb->port_str.s;
 						state=L_PARAM;
 						break;
 					case L_PARAM: /* eat the space */
 					case F_PARAM:
 						break;
 					case P_PARAM:
 					/*	*tmp=0;*/ /*!?end of param*/
 						state=L_PARAM;
 						break;
 					case L_VIA:
 					case F_VIA: /* eat the space */
 						break;
 					case F_COMMENT:
 					case P_COMMENT:
 						break;
785c78c3
 					case F_IP6HOST: /*no spaces allowed*/
22d4aa5d
 					case P_IP6HOST:
785c78c3
 						LOG(L_ERR, "ERROR:parse_via: bad ipv6 reference\n");
 						goto error;
22d4aa5d
 					case F_CRLF:
 					case F_LF:
 					case F_CR:
 						/*previous=crlf and now =' '*/
 						state=saved_state;
 						break;
 					default:
 						LOG(L_CRIT,"BUG: parse_via"
 							" on <%c>, state=%d\n",*tmp, state);
 						goto  error;
 				}
 			break;
 			case '\n':
 				switch(state){
 					case F_HOST:/*eat the spaces*/
 					case L_PORT: /*eat the spaces*/
 					case F_PORT:
 					case L_PARAM: /* eat the space */
 					case F_PARAM:
 					case F_VIA: /* eat the space */
 					case L_VIA:
 					case F_COMMENT:
 					case P_COMMENT:
 					case F_IP6HOST:
 					case P_IP6HOST:
 						saved_state=state;
 						state=F_LF;
 						break;
 					case P_HOST:
18dbc018
 						 /*mark end of host*/
22d4aa5d
 						 vb->host.len=tmp-vb->host.s;
 						 saved_state=L_PORT;
 						 state=F_LF;
 						 break;
 					case P_PORT:
18dbc018
 						/*end of port */
22d4aa5d
 						vb->port_str.len=tmp-vb->port_str.s;
 						saved_state=L_PARAM;
 						state=F_LF;
 						break;
 					case P_PARAM:
 					/*	*tmp=0;*/ /*!?end of param*/
 						saved_state=L_PARAM;
 						state=F_LF;
 						break;
 					case F_CR:
 						state=F_CRLF;
 						break;
 					case F_CRLF:
 					case F_LF:
 						state=saved_state;
 						goto endofheader;
 					default:
 						LOG(L_CRIT,"BUG: parse_via"
 							" on <%c>\n",*tmp);
 						goto  error;
 				}
 			break;
 		case '\r':
 				switch(state){
 					case F_HOST:/*eat the spaces*/
 					case L_PORT: /*eat the spaces*/
 					case F_PORT:
 					case L_PARAM: /* eat the space */
 					case F_PARAM:
 					case F_VIA: /* eat the space */
 					case L_VIA:
 					case F_COMMENT:
 					case P_COMMENT:
 					case F_IP6HOST:
 					case P_IP6HOST:
 						saved_state=state;
 						state=F_CR;
 						break;
 					case P_HOST:
18dbc018
 						 /*mark end of host*/
22d4aa5d
 						 vb->host.len=tmp-vb->host.s;
 						 saved_state=L_PORT;
 						 state=F_CR;
 						 break;
 					case P_PORT:
18dbc018
 						/*end of port */
22d4aa5d
 						vb->port_str.len=tmp-vb->port_str.s;
 						saved_state=L_PARAM;
 						state=F_CR;
 						break;
 					case P_PARAM:
 					/*	*tmp=0;*/ /*!?end of param*/
 						saved_state=L_PARAM;
 						state=F_CR;
 						break;
 					case F_CRLF:
 					case F_CR:
 					case F_LF:
 						state=saved_state;
 						goto endofheader;
 					default:
 						LOG(L_CRIT,"BUG: parse_via"
 							" on <%c>\n",*tmp);
 						goto  error;
 				}
 			break;
 			
 			case ':':
 				switch(state){
 					case F_HOST:
 					case F_IP6HOST:
785c78c3
 						state=P_IP6HOST;
 						break;
22d4aa5d
 					case P_IP6HOST:
4e2fdd79
 						break;
22d4aa5d
 					case P_HOST:
18dbc018
 						/*mark  end of host*/
22d4aa5d
 						vb->host.len=tmp-vb->host.s;
 						state=F_PORT;
 						break;
 					case L_PORT:
 						state=F_PORT;
 						break;
 					case P_PORT:
 						LOG(L_ERR, "ERROR:parse_via:"
 							" bad port\n");
 						goto error;
 					case L_PARAM:
 					case F_PARAM:
 					case P_PARAM:
 						LOG(L_ERR, "ERROR:parse_via:"
 						" bad char <%c> in state %d\n",
 							*tmp,state);
 						goto error;
 					case L_VIA:
 					case F_VIA:
 						LOG(L_ERR, "ERROR:parse_via:"
 						" bad char in compact via\n");
 						goto error;
 					case F_CRLF:
 					case F_LF:
 					case F_CR:
 						/*previous=crlf and now !=' '*/
 						goto endofheader;
 					case F_COMMENT:/*everything is allowed in a comment*/
 						vb->comment.s=tmp;
 						state=P_COMMENT;
 						break;
 					case P_COMMENT: /*everything is allowed in a comment*/
 						break;
 					default:
 						LOG(L_CRIT,"BUG: parse_via"
 							" on <%c> state %d\n",
 							*tmp, state);
 						goto error;
 				}
 				break;
 			case ';':
 				switch(state){
 					case F_HOST:
 					case F_IP6HOST:
 						LOG(L_ERR,"ERROR:parse_via:"
 							" no host found\n");
 						goto error;
 					case P_IP6HOST:
 						LOG(L_ERR, "ERROR:parse_via: bad ipv6 reference\n");
 						goto error;
 					case P_HOST:
 						vb->host.len=tmp-vb->host.s;
 						state=F_PARAM;
51767629
 						param_start=tmp+1;
22d4aa5d
 						break;
 					case P_PORT:
18dbc018
 						/*mark the end*/
22d4aa5d
 						vb->port_str.len=tmp-vb->port_str.s;
 					case L_PORT:
 					case L_PARAM:
 						state=F_PARAM;
51767629
 						param_start=tmp+1;
22d4aa5d
 						break;
 					case F_PORT:
 						LOG(L_ERR, "ERROR:parse_via:"
 						" bad char <%c> in state %d\n",
 							*tmp,state);
 						goto error;
 					case F_PARAM:
 						LOG(L_ERR,  "ERROR:parse_via:"
 							" null param?\n");
 						goto error;
 					case P_PARAM:
 						/*hmm next, param?*/
 						state=F_PARAM;
51767629
 						param_start=tmp+1;
22d4aa5d
 						break;
 					case L_VIA:
 					case F_VIA:
 						LOG(L_ERR, "ERROR:parse_via:"
 						" bad char <%c> in next via\n",
 							*tmp);
 						goto error;
 					case F_CRLF:
 					case F_LF:
 					case F_CR:
 						/*previous=crlf and now !=' '*/
 						goto endofheader;
 					case F_COMMENT:/*everything is allowed in a comment*/
 						vb->comment.s=tmp;
 						state=P_COMMENT;
 						break;
 					case P_COMMENT: /*everything is allowed in a comment*/
 						break;
 					
 					default:
 						LOG(L_CRIT,"BUG: parse_via"
 							" on <%c> state %d\n",
 							*tmp, state);
 						goto  error;
 				}
 			break;
 			case ',':
 				switch(state){
 					case F_HOST:
 					case F_IP6HOST:
 						LOG(L_ERR,"ERROR:parse_via:"
 							" no host found\n");
 						goto error;
 					case P_IP6HOST:
 						LOG(L_ERR, "ERROR:parse_via: bad ipv6 reference\n");
 						goto error;
 					case P_HOST:
18dbc018
 						/*mark the end*/
22d4aa5d
 						vb->host.len=tmp-vb->host.s;
 						state=F_VIA;
 						break;
 					case P_PORT:
18dbc018
 						/*mark the end*/
22d4aa5d
 						vb->port_str.len=tmp-vb->port_str.s;
 						state=F_VIA;
 						break;
 					case L_PORT:
 					case L_PARAM:
 					case P_PARAM:
 					case L_VIA:
 						state=F_VIA;
 						break;
 					case F_PORT:
 					case F_PARAM:
 						LOG(L_ERR, "ERROR:parse_via:"
 						" invalid char <%c> in state"
 						" %d\n", *tmp,state);
 						goto error;
 					case F_VIA:
 						/* do  nothing,  eat ","*/
 						break;	
 					case F_CRLF:
 					case F_LF:
 					case F_CR:
 						/*previous=crlf and now !=' '*/
 						goto endofheader;
 					case F_COMMENT:/*everything is allowed in a comment*/
 						vb->comment.s=tmp;
 						state=P_COMMENT;
 						break;
 					case P_COMMENT: /*everything is allowed in a comment*/
 						break;
 					default:
 						LOG(L_CRIT,"BUG: parse_via"
 							" on <%c> state %d\n",
 							*tmp, state);
 						goto  error;
 				}
 			break;
 			case '(':
 				switch(state){
 					case F_HOST:
 					case F_PORT:
 					case F_PARAM:
 					case F_VIA:
 					case F_IP6HOST:
 					case P_IP6HOST: /*must be terminated in ']'*/
 						LOG(L_ERR,"ERROR:parse_via"
 							" on <%c> state %d\n",
 							*tmp, state);
 						goto  error;
 					case P_HOST:
18dbc018
 						/*mark the end*/
22d4aa5d
 						vb->host.len=tmp-vb->host.s;
 						state=F_COMMENT;
 						c_nest++;
 						break;
 					case P_PORT:
18dbc018
 						/*mark the end*/
22d4aa5d
 						vb->port_str.len=tmp-vb->port_str.s;
 						state=F_COMMENT;
 						c_nest++;
 						break;
 					case P_PARAM:
18dbc018
 						/*mark the end*/
22d4aa5d
 						vb->params.len=tmp-vb->params.s;
 						state=F_COMMENT;
 						c_nest++;
 						break;
 					case L_PORT:
 					case L_PARAM:
 					case L_VIA:
 						state=F_COMMENT;
 						vb->params.len=tmp-vb->params.s;
 						c_nest++;
 						break;
 					case P_COMMENT:
 					case F_COMMENT:
 						c_nest++;
 						break;
 					case F_CRLF:
 					case F_LF:
 					case F_CR:
 						/*previous=crlf and now !=' '*/
 						goto endofheader;
 					default:
 						LOG(L_CRIT,"BUG: parse_via"
 							" on <%c> state %d\n",
 							*tmp, state);
 						goto  error;
 				}
 			break;
 			case ')':
 				switch(state){
 					case F_COMMENT:
 					case P_COMMENT:
 						if (c_nest){
 							c_nest--;
 							if(c_nest==0){
 								state=L_VIA;
 								vb->comment.len=tmp-vb->comment.s;
 								break;
 							}
 						}else{
 							LOG(L_ERR,"ERROR:"
 							    "parse_via: "
 							    "missing '(' - "
 							    "nesting = %d\n",
 							    c_nest);
 							 goto error;
 						}
 						break;
 					case F_HOST:
 					case F_PORT:
 					case F_PARAM:
 					case F_VIA:
 					case P_HOST:
 					case P_PORT:
 					case P_PARAM:
 					case L_PORT:
 					case L_PARAM:
 					case L_VIA:
 					case F_IP6HOST:
 					case P_IP6HOST:
 						LOG(L_ERR,"ERROR:parse_via"
 							" on <%c> state %d\n",
 							*tmp, state);
 						goto  error;
 					case F_CRLF:
 					case F_LF:
 					case F_CR:
 						/*previous=crlf and now !=' '*/
 						goto endofheader;
 					default:
 						LOG(L_CRIT,"BUG: parse_via"
 							" on <%c> state %d\n",
 							*tmp, state);
 						goto  error;
 				}
 				break;
 			case '[':
 				switch(state){
 					case F_HOST:
785c78c3
 						vb->host.s=tmp; /* mark start here (include [])*/
22d4aa5d
 						state=F_IP6HOST;
 						break;
 					case F_COMMENT:/*everything is allowed in a comment*/
 						vb->comment.s=tmp;
 						state=P_COMMENT;
 						break;
 					case P_COMMENT:
 						break;
 					case F_CRLF:
 					case F_LF:
 					case F_CR:
 						/*previous=crlf and now !=' '*/
 						goto endofheader;
 					default:
 						LOG(L_ERR,"ERROR:parse_via"
 							" on <%c> state %d\n",
 							*tmp, state);
 						goto  error;
 				}
 				break;
 			case ']':
 				switch(state){
 					case P_IP6HOST:
18dbc018
 						/*mark the end*/
785c78c3
 						vb->host.len=(tmp-vb->host.s)+1; /* include "]" */
22d4aa5d
 						state=L_PORT;
 						break;
 					case F_CRLF:
 					case F_LF:
 					case F_CR:
 						/*previous=crlf and now !=' '*/
 						goto endofheader;
 					case F_COMMENT:/*everything is allowed in a comment*/
 						vb->comment.s=tmp;
 						state=P_COMMENT;
 						break;
 					case P_COMMENT:
 						break;
 					default:
 						LOG(L_ERR,"ERROR:parse_via"
 							" on <%c> state %d\n",
 							*tmp, state);
 						goto  error;
 				}
 				break;
 						
 			default:
 				switch(state){
 					case F_HOST:
 						state=P_HOST;
 						vb->host.s=tmp;
 						break;
 					case P_HOST:
 						break;
 					case F_PORT:
 						state=P_PORT;
 						vb->port_str.s=tmp;
 						break;
 					case P_PORT:
 						/*check if number?*/
 						break;
 					case F_PARAM:
 						/*state=P_PARAM*/;
51767629
 						if(vb->params.s==0) vb->params.s=param_start;
89e74c57
 						param=pkg_malloc(sizeof(struct via_param));
 						if (param==0){
 							LOG(L_ERR, "ERROR:parse_via: mem. allocation"
 									" error\n");
 							goto error;
 						}
 						memset(param,0, sizeof(struct via_param));
51767629
 						param->start=param_start;
89e74c57
 						tmp=parse_via_param(tmp, end, &state, &saved_state,
 											param);
0fcc2741
 
22d4aa5d
 						switch(state){
 							case F_PARAM:
51767629
 								param_start=tmp+1;
 							case L_PARAM:
22d4aa5d
 							case F_LF:
 							case F_CR:
 								break;
 							case F_VIA:
51767629
 								vb->params.len=param->start+param->size
 												-vb->params.s;
22d4aa5d
 								break;
 							case END_OF_HEADER:
51767629
 								vb->params.len=param->start+param->size
 												-vb->params.s;
4b33e625
 								break;
89e74c57
 							case PARAM_ERROR:
7f858173
 								pkg_free(param);
89e74c57
 								goto error;
22d4aa5d
 							default:
6c9b2a39
 								pkg_free(param);
22d4aa5d
 								LOG(L_ERR, "ERROR: parse_via after"
 										" parse_via_param: invalid"
 										" char <%c> on state %d\n",
 										*tmp, state);
 								goto error;
 						}
eaf48c3f
 						/*add param to the list*/
 						if (vb->last_param)	vb->last_param->next=param;
 						else				vb->param_lst=param;
 						vb->last_param=param;
 						if (param->type==PARAM_BRANCH)
 							vb->branch=param;
5bc22c81
 						else if (param->type==PARAM_RECEIVED)
 							vb->received=param;
09f7cd2c
 						else if (param->type==PARAM_RPORT)
 							vb->rport=param;
 						else if (param->type==PARAM_I)
 							vb->i=param;
4b33e625
 						
 						if (state==END_OF_HEADER){
 							state=saved_state;
 							goto endofheader;
 						}
22d4aa5d
 						break;
 					case P_PARAM:
 						break;
 					case F_VIA:
 						/*vb->next=tmp;*/ /*???*/
 						goto nextvia;
 					case L_PORT:
 					case L_PARAM:
 					case L_VIA:
 						LOG(L_ERR,"ERROR:parse_via"
 							" on <%c> state %d (default)\n",
 							*tmp, state);
 						goto  error;
 					case F_COMMENT:
 						state=P_COMMENT;
 						vb->comment.s=tmp;
 						break;
 					case P_COMMENT:
 						break;
 					case F_IP6HOST:
 						state=P_IP6HOST;
 						break;
 					case P_IP6HOST:
 						break;
 					case F_CRLF:
 					case F_LF:
 					case F_CR:
 						/*previous=crlf and now !=' '*/
 						goto endofheader;
 					default:
 						LOG(L_ERR, "BUG:parse_via:"
 							" invalid char <%c>"
 							" in state %d\n",
 							*tmp, state);
 						goto error;
 				}
0fcc2741
 
 
 		}
22d4aa5d
 	}
 
 	DBG("end of packet reached, state=%d\n", state);
 	goto endofpacket; /*end of packet, probably should be goto error*/
 	
 endofheader:
 	state=saved_state;
 	DBG("end of header reached, state=%d\n", state);
 endofpacket:
 	/* check if error*/
 	switch(state){
 		case P_HOST:
 		case L_PORT:
 		case P_PORT:
 		case L_PARAM:
 		case P_PARAM:
 		case P_VALUE:
 		case GEN_PARAM:
 		case FIN_HIDDEN:
 		case L_VIA:
 			break;
 		default:
 			LOG(L_ERR, "ERROR: parse_via: invalid via - end of header in"
 					" state %d\n", state);
 			goto error;
 	}
0fcc2741
 
22d4aa5d
 
 	/*
 	if (proto) printf("<SIP/2.0/%s>\n", proto);
 	if (host) printf("host= <%s>\n", host);
 	if (port_str) printf("port= <%s>\n", port_str);
 	if (param) printf("params= <%s>\n", param);
 	if (comment) printf("comment= <%s>\n", comment);
 	if(next_via) printf("next_via= <%s>\n", next_via);
 	*/
 	/*DBG("parse_via: rest=<%s>\n", tmp);*/
0fcc2741
 
34af87af
 	vb->error=PARSE_OK;
22d4aa5d
 	vb->bsize=tmp-buffer;
 	if (vb->port_str.s){
6419a43f
 		vb->port=str2s(vb->port_str.s, vb->port_str.len, &err);
22d4aa5d
 		if (err){
049f64c2
 					LOG(L_ERR, "ERROR: parse_via: invalid port number <%.*s>\n",
6b6f226f
 						vb->port_str.len, ZSW(vb->port_str.s));
22d4aa5d
 					goto error;
 		}
 	}
 	return tmp;
 nextvia:
eaf48c3f
 	DBG("parse_via: next_via\n");
34af87af
 	vb->error=PARSE_OK;
22d4aa5d
 	vb->bsize=tmp-buffer;
 	if (vb->port_str.s){
6419a43f
 		vb->port=str2s(vb->port_str.s, vb->port_str.len, &err);
22d4aa5d
 		if (err){
049f64c2
 					LOG(L_ERR, "ERROR: parse_via: invalid port number <%.*s>\n",
6b6f226f
 						vb->port_str.len, ZSW(vb->port_str.s));
22d4aa5d
 					goto error;
 		}
 	}
 	vb->next=pkg_malloc(sizeof(struct via_body));
 	if (vb->next==0){
 		LOG(L_ERR, "ERROR: parse_via: out of memory\n");
 		goto error;
 	}
 	vb=vb->next;
 	memset(vb, 0, sizeof(struct via_body));
 	buffer=tmp;
 	goto parse_again;
 
 error:
ad04ce27
 	if (end>buffer){
6b6f226f
 		LOG(L_ERR, "ERROR: parse_via on: <%.*s>\n", (int)(end-buffer), ZSW(buffer));
ad04ce27
 	}
 	if ((tmp>buffer)&&(tmp<end)){
 		LOG(L_ERR, "ERROR: parse_via parse error, parsed so far:<%.*s>\n",
6b6f226f
 				(int)(tmp-buffer), ZSW(buffer) );
ad04ce27
 	}else{
 		LOG(L_ERR, "ERROR: parse_via: via parse error\n");
 	}
34af87af
 	vb->error=PARSE_ERROR;
22d4aa5d
 	return tmp;
 }
 
 
2bb60634
 static inline void free_via_param_list(struct via_param* vp)
 {
 	struct via_param* foo;
 	while(vp){
 		foo=vp;
 		vp=vp->next;
 		pkg_free(foo);
 	}
 }
 
 
 void free_via_list(struct via_body* vb)
 {
 	struct via_body* foo;
 	while(vb){
 		foo=vb;
 		vb=vb->next;
 		if (foo->param_lst) free_via_param_list(foo->param_lst);
 		pkg_free(foo);
 	}
 }