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kamailio/parser/parse_via.c

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/*
* $Id$
*
* via parsing automaton
*
*
* 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
*/
/** @file
* @brief Parser :: Via parsing automation
*
* @ingroup parser
*/
/*
* 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
* 2003-01-27 modified parse_via to set new via_param->start member and
* via->params.s (andrei)
* 2003-01-28 zero-terminations replaced with VIA_ZT (jiri)
* 2003-02-28 scratchpad compatibility abandoned (jiri)
* 2003-04-26 ZSW (jiri)
* 2003-06-23 fixed parse_via_param [op].* param. parsing bug (andrei)
* 2003-07-02 added support for TLS parsing in via (andrei)
* 2003-10-27 added support for alias via param parsing [see
* draft-ietf-sip-connect-reuse-00.txt.] (andrei)
* 2004-03-31 fixed rport set instead of i bug (andrei)
* 2005-03-02 if via has multiple bodies, and one of them is bad set
* also the first one as bad (andrei)
* 2006-02-24 added support for comp parameter parsing, see rfc3486 (andrei)
* 2008-08-08 SCTP support (andrei)
*/
#include "../comp_defs.h"
#include <stdlib.h>
#include <string.h>
#include "../dprint.h"
#include "../ut.h"
#include "../mem/mem.h"
#include "../ip_addr.h"
#include "parse_via.h"
#include "parse_def.h"
#include "msg_parser.h"
/** \brief main via states (uri:port ...) */
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,
F_IP6HOST, P_IP6HOST,
F_CRLF,
F_LF,
F_CR,
END_OF_HEADER
};
/** \brief first via part state */
enum {
F_SIP = 100,
SIP1, SIP2, FIN_SIP,
L_VER, F_VER,
VER1, VER2, FIN_VER,
UDP1, UDP2, FIN_UDP,
TCP_TLS1, TCP2, FIN_TCP,
TLS2, FIN_TLS,
SCTP1, SCTP2, SCTP3, FIN_SCTP,
OTHER_PROTO,
L_PROTO, F_PROTO
};
/** \brief param related states
* WARNING: keep in sync with parse_via.h, PARAM_HIDDEN, ...
*/
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,
RPORT1, RPORT2, RPORT3,
ALIAS1, ALIAS2, ALIAS3, ALIAS4,
#ifdef USE_COMP
COMP1, COMP2, COMP3,
/* values */
L_COMP_VALUE, F_COMP_VALUE,
V_COMP_S, V_SIGCOMP_I, V_SIGCOMP_G, V_SIGCOMP_C, V_SIGCOMP_O, V_SIGCOMP_M,
FIN_V_SIGCOMP_P,
V_SERGZ_E, V_SERGZ_R, V_SERGZ_G, FIN_V_SERGZ_Z,
#endif
/* fin states (227-...)*/
FIN_HIDDEN = 230, FIN_TTL, FIN_BRANCH,
FIN_MADDR, FIN_RECEIVED, FIN_RPORT, FIN_I, FIN_ALIAS
#ifdef USE_COMP
, FIN_COMP
#endif
/*GEN_PARAM,
PARAM_ERROR*/ /* declared in msg_parser.h*/
};
/* entry state must be F_PARAM, or saved_state=F_PARAM and
* state=F_{LF,CR,CRLF}!
* output state = L_PARAM or F_PARAM or END_OF_HEADER
* (and saved_state= last state); everything else => error
* WARNING: param->start must be filled before, it's used in param->size
* computation.
*/
static /*inline*/ char* parse_via_param(char* p, char* end,
unsigned char* pstate,
unsigned char* psaved_state,
struct via_param* param,
struct via_body* vb)
{
char* tmp;
register unsigned char state;
unsigned char saved_state;
#define value_case(c, C, oldstate, newstate, start_of_value) \
case (c): \
case (C): \
switch(state){ \
case (oldstate): \
state=(newstate); \
if ((start_of_value)) param->value.s=tmp; \
break; \
default_value_cases \
} \
break
#define value_case_double(c, C, oldstate1, newstate1, oldstate2, newstate2) \
case (c): \
case (C): \
switch(state){ \
case (oldstate1): \
state=(newstate1); \
break; \
case (oldstate2): \
state=(newstate2); \
break; \
default_value_cases \
} \
break
#define default_value_cases \
case F_VALUE: \
state=P_VALUE; \
param->value.s=tmp; \
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: \
switch(state){ \
case F_COMP_VALUE: \
comp_unexpected_char; \
state=P_VALUE; \
param->value.s=tmp; \
break; \
comp_states_cases \
comp_fin_states_cases \
comp_unexpected_char; \
state=P_VALUE; \
break; \
default: \
LOG(L_ERR, "ERROR: parse_via_param: invalid " \
"char <%c> in state %d\n", *tmp, state); \
goto error; \
}
#define comp_states_cases \
case V_COMP_S: \
case V_SIGCOMP_I: \
case V_SIGCOMP_G: \
case V_SIGCOMP_C: \
case V_SIGCOMP_O: \
case V_SIGCOMP_M: \
case V_SERGZ_E: \
case V_SERGZ_R: \
case V_SERGZ_G:
#define comp_fin_states_cases \
case FIN_V_SIGCOMP_P: \
case FIN_V_SERGZ_Z:
/* if unrecognized/bad comp, don't return error, just ignore comp */
#define comp_unexpected_char \
LOG(L_ERR, "parse_via_param: bad/unrecognized" \
" comp method\n"); \
vb->comp_no=0
state=*pstate;
saved_state=*psaved_state;
param->type=PARAM_ERROR;
for (tmp=p;tmp<end;tmp++){
switch(*tmp){
case ' ':
case '\t':
switch(state){
case FIN_HIDDEN:
case FIN_ALIAS:
param->type=state;
param->name.len=tmp-param->name.s;
state=L_PARAM;
goto endofparam;
case FIN_BRANCH:
case FIN_TTL:
case FIN_MADDR:
case FIN_RECEIVED:
case FIN_RPORT:
case FIN_I:
param->type=state;
param->name.len=tmp-param->name.s;
state=L_VALUE;
goto find_value;
#ifdef USE_COMP
case FIN_COMP:
param->type=state;
param->name.len=tmp-param->name.s;
state=L_COMP_VALUE;
goto find_value;
#endif
case F_PARAM:
break;
case F_LF:
case F_CR:
case F_CRLF:
state=saved_state;
break;
case GEN_PARAM:
default:
param->type=GEN_PARAM;
param->name.len=tmp-param->name.s;
state=L_VALUE;
goto find_value;
}
break;
/* \n and \r*/
case '\n':
switch(state){
case FIN_HIDDEN:
case FIN_ALIAS:
param->type=state;
param->name.len=tmp-param->name.s;
param->size=tmp-param->start;
saved_state=L_PARAM;
state=F_LF;
goto endofparam;
case FIN_BRANCH:
case FIN_TTL:
case FIN_MADDR:
case FIN_RECEIVED:
case FIN_I:
case FIN_RPORT:
param->type=state;
param->name.len=tmp-param->name.s;
param->size=tmp-param->start;
saved_state=L_VALUE;
state=F_LF;
goto find_value;
#ifdef USE_COMP
case FIN_COMP:
param->type=state;
param->name.len=tmp-param->name.s;
param->size=tmp-param->start;
saved_state=L_COMP_VALUE;
state=F_LF;
goto find_value;
#endif
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:
param->type=GEN_PARAM;
saved_state=L_VALUE;
param->name.len=tmp-param->name.s;
param->size=tmp-param->start;
state=F_LF;
goto find_value;
}
break;
case '\r':
switch(state){
case FIN_HIDDEN:
case FIN_ALIAS:
param->type=state;
param->name.len=tmp-param->name.s;
param->size=tmp-param->start;
saved_state=L_PARAM;
state=F_CR;
goto endofparam;
case FIN_BRANCH:
case FIN_TTL:
case FIN_MADDR:
case FIN_RECEIVED:
case FIN_I:
case FIN_RPORT:
param->type=state;
param->name.len=tmp-param->name.s;
param->size=tmp-param->start;
saved_state=L_VALUE;
state=F_CR;
goto find_value;
#ifdef USE_COMP
case FIN_COMP:
param->type=state;
param->name.len=tmp-param->name.s;
param->size=tmp-param->start;
saved_state=L_COMP_VALUE;
state=F_LF;
goto find_value;
#endif
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:
param->type=GEN_PARAM;
param->name.len=tmp-param->name.s;
param->size=tmp-param->start;
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:
case FIN_RPORT:
case FIN_I:
param->type=state;
param->name.len=tmp-param->name.s;
state=F_VALUE;
goto find_value;
#ifdef USE_COMP
case FIN_COMP:
param->type=state;
param->name.len=tmp-param->name.s;
state=F_COMP_VALUE;
goto find_value;
#endif
case F_PARAM:
case FIN_HIDDEN:
case FIN_ALIAS:
LOG(L_ERR, "ERROR: parse_via: invalid char <%c> in"
" state %d\n", *tmp, state);
goto error;
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_VALUE;
goto find_value;
}
break;
case ';':
switch(state){
case FIN_HIDDEN:
case FIN_RPORT: /* rport can appear w/o a value */
case FIN_ALIAS:
param->type=state;
param->name.len=tmp-param->name.s;
state=F_PARAM;
goto endofparam;
case FIN_BRANCH:
case FIN_MADDR:
case FIN_TTL:
case FIN_RECEIVED:
case FIN_I:
#ifdef USE_COMP
case FIN_COMP:
#endif
LOG(L_ERR, "ERROR: parse_via: invalid char <%c> in"
" state %d\n", *tmp, state);
goto error;
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_PARAM;
goto endofparam;
}
break;
case ',':
switch(state){
case FIN_HIDDEN:
case FIN_RPORT:
case FIN_ALIAS:
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:
case FIN_I:
#ifdef USE_COMP
case FIN_COMP:
#endif
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;
/* param names */
case 'h':
case 'H':
switch(state){
case F_PARAM:
state=HIDDEN1;
param->name.s=tmp;
break;
case BRANCH5:
state=FIN_BRANCH;
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 'i':
case 'I':
switch(state){
case F_PARAM:
state=FIN_I;
param->name.s=tmp;
break;
case HIDDEN1:
state=HIDDEN2;
break;
case RECEIVED4:
state=RECEIVED5;
break;
case ALIAS2:
state=ALIAS3;
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){
case F_PARAM:
state=GEN_PARAM;
param->name.s=tmp;
break;
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){
case F_PARAM:
state=GEN_PARAM;
param->name.s=tmp;
break;
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){
case F_PARAM:
state=GEN_PARAM;
param->name.s=tmp;
break;
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;
param->name.s=tmp;
break;
case TTL1:
state=TTL2;
break;
case RPORT3:
state=FIN_RPORT;
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 'l':
case 'L':
switch(state){
case F_PARAM:
state=GEN_PARAM;
param->name.s=tmp;
break;
case TTL2:
state=FIN_TTL;
break;
case ALIAS1:
state=ALIAS2;
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;
param->name.s=tmp;
break;
#ifdef USE_COMP
case COMP2:
state=COMP3;
break;
#endif
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){
case F_PARAM:
state=ALIAS1;
param->name.s=tmp;
break;
case MADDR1:
state=MADDR2;
break;
case BRANCH2:
state=BRANCH3;
break;
case ALIAS3:
state=ALIAS4;
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;
param->name.s=tmp;
break;
case BRANCH1:
state=BRANCH2;
break;
case RPORT2:
state=RPORT3;
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 'c':
case 'C':
switch(state){
case F_PARAM:
#ifdef USE_COMP
state=COMP1;
#else
state=GEN_PARAM;
#endif
param->name.s=tmp;
break;
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){
case F_PARAM:
state=GEN_PARAM;
param->name.s=tmp;
break;
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;
param->name.s=tmp;
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 'p':
case 'P':
switch(state){
case F_PARAM:
state=GEN_PARAM;
param->name.s=tmp;
break;
case RECEIVED1:
state=RPORT1;
break;
#ifdef USE_COMP
case COMP3:
state=FIN_COMP;
break;
#endif
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){
case F_PARAM:
state=GEN_PARAM;
param->name.s=tmp;
break;
case RPORT1:
state=RPORT2;
break;
#ifdef USE_COMP
case COMP1:
state=COMP2;
break;
#endif
case F_CR:
case F_LF:
case F_CRLF:
state=END_OF_HEADER;
goto end_via;
default:
state=GEN_PARAM;
}
break;
case 's':
case 'S':
switch(state){
case F_PARAM:
state=GEN_PARAM;
param->name.s=tmp;
break;
case ALIAS4:
state=FIN_ALIAS;
break;
case F_CR:
case F_LF:
case F_CRLF:
state=END_OF_HEADER;
goto end_via;
default:
state=GEN_PARAM;
}
break;
default:
switch(state){
case F_PARAM:
state=GEN_PARAM;
param->name.s=tmp;
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;
}
}
}/* for tmp*/
/* end of packet? => error, no cr/lf,',' found!!!*/
saved_state=state;
state=END_OF_HEADER;
goto error;
find_value:
tmp++;
for(;*tmp;tmp++){
switch(*tmp){
case ' ':
case '\t':
switch(state){
case L_VALUE:
case F_VALUE: /*eat space*/
break;
case P_VALUE:
state=L_PARAM;
param->value.len=tmp-param->value.s;
goto endofvalue;
#ifdef USE_COMP
case L_COMP_VALUE:
case F_COMP_VALUE:
break; /* eat space */
case FIN_V_SIGCOMP_P:
state=L_PARAM;
param->value.len=tmp-param->value.s;
vb->comp_no=COMP_SIGCOMP;
goto endofvalue;
case FIN_V_SERGZ_Z:
state=L_PARAM;
param->value.len=tmp-param->value.s;
vb->comp_no=COMP_SIGCOMP;
goto endofvalue;
comp_states_cases
state=L_PARAM;
param->value.len=tmp-param->value.s;
comp_unexpected_char;
goto endofvalue;
#endif
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>"
" in state %d\n", *tmp, state);
goto error;
}
break;
case '\n':
switch(state){
case L_VALUE:
case F_VALUE: /*eat space*/
#ifdef USE_COMP
case L_COMP_VALUE:
case F_COMP_VALUE:
#endif
case P_STRING:
saved_state=state;
param->size=tmp-param->start;
state=F_LF;
break;
case P_VALUE:
saved_state=L_PARAM;
state=F_LF;
param->value.len=tmp-param->value.s;
goto endofvalue;
#ifdef USE_COMP
case FIN_V_SIGCOMP_P:
saved_state=L_PARAM;
state=F_LF;
param->value.len=tmp-param->value.s;
vb->comp_no=COMP_SIGCOMP;
goto endofvalue;
case FIN_V_SERGZ_Z:
saved_state=L_PARAM;
state=F_LF;
param->value.len=tmp-param->value.s;
vb->comp_no=COMP_SIGCOMP;
goto endofvalue;
comp_states_cases
saved_state=L_PARAM;
state=F_LF;
param->value.len=tmp-param->value.s;
comp_unexpected_char;
goto endofvalue;
#endif
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>"
" in state %d\n", *tmp, state);
goto error;
}
break;
case '\r':
switch(state){
case L_VALUE:
case F_VALUE: /*eat space*/
#ifdef USE_COMP
case L_COMP_VALUE:
case F_COMP_VALUE:
#endif
case P_STRING:
saved_state=state;
param->size=tmp-param->start;
state=F_CR;
break;
case P_VALUE:
param->value.len=tmp-param->value.s;
saved_state=L_PARAM;
state=F_CR;
goto endofvalue;
#ifdef USE_COMP
case FIN_V_SIGCOMP_P:
saved_state=L_PARAM;
state=F_CR;
param->value.len=tmp-param->value.s;
vb->comp_no=COMP_SIGCOMP;
goto endofvalue;
case FIN_V_SERGZ_Z:
saved_state=L_PARAM;
state=F_CR;
param->value.len=tmp-param->value.s;
vb->comp_no=COMP_SIGCOMP;
goto endofvalue;
comp_states_cases
saved_state=L_PARAM;
state=F_CR;
param->value.len=tmp-param->value.s;
comp_unexpected_char;
goto endofvalue;
#endif
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>"
" in state %d\n", *tmp, state);
goto error;
}
break;
case '=':
switch(state){
case L_VALUE:
state=F_VALUE;
break;
#ifdef USE_COMP
case L_COMP_VALUE:
state=F_COMP_VALUE;
break;
/* '=' in any other COMP value state is an error,
* and it will be catched by the default branch */
#endif
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>"
" in state %d\n", *tmp, state);
goto error;
}
break;
case ';':
switch(state){
case P_VALUE:
param->value.len=tmp-param->value.s;
state=F_PARAM;
goto endofvalue;
case F_VALUE:
param->value.len=0;
state=F_PARAM;
goto endofvalue;
case P_STRING:
break; /* what to do? */
case F_LF:
case F_CR:
case F_CRLF:
state=END_OF_HEADER;
goto end_via;
#ifdef USE_COMP
case L_COMP_VALUE:
comp_unexpected_char;
/* we want to contine with no comp */
state=F_PARAM;
param->value.len=0;
param->value.s=0;
goto endofvalue;
case F_COMP_VALUE:
comp_unexpected_char;
param->value.len=0;
state=F_PARAM;
goto endofvalue;
comp_states_cases
comp_unexpected_char;
param->value.len=tmp-param->value.s;
state=F_PARAM;
goto endofvalue;
case FIN_V_SIGCOMP_P:
vb->comp_no=COMP_SIGCOMP;
param->value.len=tmp-param->value.s;
state=F_PARAM;
goto endofvalue;
case FIN_V_SERGZ_Z:
vb->comp_no=COMP_SIGCOMP;
param->value.len=tmp-param->value.s;
state=F_PARAM;
goto endofvalue;
#endif
case L_VALUE:
param->value.len=0;
param->value.s=0; /* null value */
state=F_PARAM;
goto endofvalue;
default:
LOG(L_ERR, "ERROR: parse_via: invalid char <%c>"
" in state %d\n", *tmp, state);
goto error;
}
break;
case ',':
switch(state){
case P_VALUE:
param->value.len=tmp-param->value.s;
state=F_VIA;
goto endofvalue;
case P_STRING:
case F_LF:
case F_CR:
case F_CRLF:
state=END_OF_HEADER;
goto end_via;
#ifdef USE_COMP
case L_COMP_VALUE:
comp_unexpected_char;
/* we want to contine with no comp */
state=F_VIA;
param->value.len=0;
param->value.s=0;
goto endofvalue;
case F_COMP_VALUE:
comp_unexpected_char;
param->value.len=0;
state=F_VIA;
goto endofvalue;
comp_states_cases
comp_unexpected_char;
param->value.len=tmp-param->value.s;
state=F_VIA;
goto endofvalue;
case FIN_V_SIGCOMP_P:
vb->comp_no=COMP_SIGCOMP;
param->value.len=tmp-param->value.s;
state=F_VIA;
goto endofvalue;
case FIN_V_SERGZ_Z:
vb->comp_no=COMP_SIGCOMP;
param->value.len=tmp-param->value.s;
state=F_VIA;
goto endofvalue;
#endif
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 */
default:
LOG(L_ERR, "ERROR: parse_via: invalid char <%c>"
" in state %d\n", *tmp, state);
goto error;
}
break; /* what to do? */
case '"':
switch(state){
case F_VALUE:
state=P_STRING;
param->value.s=tmp+1;
break;
case P_STRING:
state=L_PARAM;
param->value.len=tmp-param->value.s;
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>"
" in state %d\n", *tmp, state);
goto error;
}
break;
#ifdef USE_COMP
value_case('s', 'S', F_COMP_VALUE, V_COMP_S, 1);
value_case('i', 'I', V_COMP_S, V_SIGCOMP_I, 0);
value_case_double('g', 'G', V_SIGCOMP_I, V_SIGCOMP_G,
V_SERGZ_R, V_SERGZ_G);
value_case('c', 'C', V_SIGCOMP_G, V_SIGCOMP_C, 0);
value_case('o', 'O', V_SIGCOMP_C, V_SIGCOMP_O, 0);
value_case('m', 'M', V_SIGCOMP_O, V_SIGCOMP_M, 0);
value_case('p', 'P', V_SIGCOMP_M, FIN_V_SIGCOMP_P, 0);
value_case('e', 'E', V_COMP_S, V_SERGZ_E, 0);
value_case('r', 'R', V_SERGZ_E, V_SERGZ_R, 0);
value_case('z', 'Z', V_SERGZ_G, FIN_V_SERGZ_Z, 0);
#endif /* USE_COMP */
default:
switch(state){
case F_VALUE:
state=P_VALUE;
param->value.s=tmp;
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:
#ifdef USE_COMP
switch(state){
case F_COMP_VALUE:
comp_unexpected_char;
state=P_VALUE;
param->value.s=tmp;
break;
comp_states_cases
comp_fin_states_cases
comp_unexpected_char;
state=P_VALUE;
break;
default:
LOG(L_ERR, "ERROR: parse_via_param: invalid "
"char <%c> in state %d\n", *tmp, state);
goto error;
}
#else
LOG(L_ERR, "ERROR: parse_via: invalid char <%c>"
" in state %d\n", *tmp, state);
goto error;
#endif /* USE_COMP */
}
}
} /* for2 tmp*/
/* end of buff and no CR/LF =>error*/
saved_state=state;
state=END_OF_HEADER;
goto error;
endofparam:
endofvalue:
param->size=tmp-param->start;
normal_exit:
*pstate=state;
*psaved_state=saved_state;
DBG("Found param type %d, <%.*s> = <%.*s>; state=%d\n", param->type,
param->name.len, ZSW(param->name.s),
(param->value.len?param->value.len:3),
(param->value.len?param->value.s:"n/a"), state);
return tmp;
end_via:
/* if we are here we found an "unexpected" end of via
* (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)){
saved_state=L_PARAM; /* change the saved_state, we have an unknown
param. w/o a value */
/* param->size should be computed before */
goto normal_exit;
}
*pstate=state;
*psaved_state=saved_state;
DBG("Error on param type %d, <%.*s>, state=%d, saved_state=%d\n",
param->type, param->name.len, ZSW(param->name.s), state, saved_state);
error:
LOG(L_ERR, "error: parse_via_param\n");
param->type=PARAM_ERROR;
*pstate=PARAM_ERROR;
*psaved_state=state;
return tmp;
}
/*
* call it with a vb initialized to 0
* returns: pointer after the parsed parts and sets vb->error
* WARNING: don't forget to cleanup on error with free_via_list(vb)!
*/
char* parse_via(char* buffer, char* end, struct via_body *vbody)
{
char* tmp;
char* param_start;
unsigned char state;
unsigned char saved_state;
int c_nest;
int err;
struct via_body* vb;
struct via_param* param;
vb=vbody; /* keep orignal vbody value, needed to set the error member
in case of multiple via bodies in the same header */
parse_again:
vb->error=PARSE_ERROR;
/* parse start of via ( SIP/2.0/UDP )*/
state=F_SIP;
saved_state=F_SIP; /* fixes gcc 4.0 warning */
param_start=0;
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;
case FIN_UDP:
vb->transport.len=tmp-vb->transport.s;
vb->proto=PROTO_UDP;
state=F_HOST; /* start looking for host*/
goto main_via;
case FIN_TCP:
/* finished proto parsing */
vb->transport.len=tmp-vb->transport.s;
vb->proto=PROTO_TCP;
state=F_HOST; /* start looking for host*/
goto main_via;
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;
case FIN_SCTP:
/* finished proto parsing */
vb->transport.len=tmp-vb->transport.s;
vb->proto=PROTO_SCTP;
state=F_HOST; /* start looking for host*/
goto main_via;
case OTHER_PROTO:
/* finished proto parsing */
vb->transport.len=tmp-vb->transport.s;
vb->proto=PROTO_OTHER;
state=F_HOST; /* start looking for host*/
goto main_via;
case UDP1:
case UDP2:
case TCP_TLS1:
case TCP2:
case TLS2:
case SCTP1:
case SCTP2:
case SCTP3:
/* finished proto parsing */
vb->transport.len=tmp-vb->transport.s;
vb->proto=PROTO_OTHER;
state=F_HOST; /* start looking for host*/
goto main_via;
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;
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:
vb->transport.len=tmp-vb->transport.s;
vb->proto=PROTO_TCP;
state=F_LF;
saved_state=F_HOST; /* start looking for host*/
goto main_via;
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;
case FIN_SCTP:
/* finished proto parsing */
vb->transport.len=tmp-vb->transport.s;
vb->proto=PROTO_SCTP;
state=F_LF;
saved_state=F_HOST; /* start looking for host*/
goto main_via;
case OTHER_PROTO:
/* finished proto parsing */
vb->transport.len=tmp-vb->transport.s;
vb->proto=PROTO_OTHER;
state=F_LF;
saved_state=F_HOST; /* start looking for host*/
goto main_via;
case UDP1:
case UDP2:
case TCP_TLS1:
case TCP2:
case TLS2:
case SCTP1:
case SCTP2:
case SCTP3:
/* finished proto parsing */
vb->transport.len=tmp-vb->transport.s;
vb->proto=PROTO_OTHER;
state=F_LF;
saved_state=F_HOST; /* start looking for host*/
goto main_via;
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;
case FIN_UDP:
vb->transport.len=tmp-vb->transport.s;
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;
state=F_CR;
saved_state=F_HOST;
goto main_via;
case FIN_TLS:
vb->transport.len=tmp-vb->transport.s;
vb->proto=PROTO_TLS;
state=F_CR;
saved_state=F_HOST;
goto main_via;
case FIN_SCTP:
vb->transport.len=tmp-vb->transport.s;
vb->proto=PROTO_SCTP;
state=F_CR;
saved_state=F_HOST;
goto main_via;
case OTHER_PROTO:
vb->transport.len=tmp-vb->transport.s;
vb->proto=PROTO_OTHER;
state=F_CR;
saved_state=F_HOST;
goto main_via;
case UDP1:
case UDP2:
case TCP_TLS1:
case TCP2:
case TLS2:
case SCTP1:
case SCTP2:
case SCTP3:
/* finished proto parsing */
vb->transport.len=tmp-vb->transport.s;
vb->proto=PROTO_OTHER;
state=F_CR;
saved_state=F_HOST;
goto main_via;
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;
case TLS2:
state=FIN_TLS;
break;
case F_PROTO:
state=SCTP1;
vb->transport.s=tmp;
break;
case OTHER_PROTO:
break;
case UDP1:
case UDP2:
case FIN_UDP:
case TCP_TLS1:
case TCP2:
case FIN_TCP:
case FIN_TLS:
case SCTP1:
case SCTP2:
case SCTP3:
case FIN_SCTP:
state=OTHER_PROTO;
break;
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;
case OTHER_PROTO:
break;
case UDP1:
case UDP2:
case FIN_UDP:
case TCP_TLS1:
case TCP2:
case FIN_TCP:
case TLS2:
case FIN_TLS:
case SCTP1:
case SCTP2:
case SCTP3:
case FIN_SCTP:
state=OTHER_PROTO;
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 */
case UDP2:
state=FIN_UDP;
break;
case TCP2:
state=FIN_TCP;
break;
case SCTP3:
state=FIN_SCTP;
break;
case OTHER_PROTO:
break;
case UDP1:
case FIN_UDP:
case TCP_TLS1:
case FIN_TCP:
case TLS2:
case FIN_TLS:
case SCTP1:
case SCTP2:
case FIN_SCTP:
state=OTHER_PROTO;
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;
vb->transport.s=tmp;
break;
case OTHER_PROTO:
break;
case UDP1:
case UDP2:
case FIN_UDP:
case TCP_TLS1:
case TCP2:
case FIN_TCP:
case TLS2:
case FIN_TLS:
case SCTP1:
case SCTP2:
case SCTP3:
case FIN_SCTP:
state=OTHER_PROTO;
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;
case OTHER_PROTO:
break;
case UDP2:
case FIN_UDP:
case TCP_TLS1:
case TCP2:
case FIN_TCP:
case TLS2:
case FIN_TLS:
case SCTP1:
case SCTP2:
case SCTP3:
case FIN_SCTP:
state=OTHER_PROTO;
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){
case F_PROTO:
state=TCP_TLS1;
vb->transport.s=tmp;
break;
case SCTP2:
state=SCTP3;
break;
case OTHER_PROTO:
break;
case UDP1:
case UDP2:
case FIN_UDP:
case TCP_TLS1:
case TCP2:
case FIN_TCP:
case TLS2:
case FIN_TLS:
case SCTP1:
case SCTP3:
case FIN_SCTP:
state=OTHER_PROTO;
break;
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){
case TCP_TLS1:
state=TCP2;
break;
case SCTP1:
state=SCTP2;
break;
case OTHER_PROTO:
break;
case UDP1:
case UDP2:
case FIN_UDP:
case TCP2:
case FIN_TCP:
case TLS2:
case FIN_TLS:
case SCTP2:
case SCTP3:
case FIN_SCTP:
state=OTHER_PROTO;
break;
default:
LOG(L_ERR, "ERROR: parse_via: bad char <%c> on"
" state %d\n", *tmp, state);
goto error;
}
break;
case 'L':
case 'l':
switch(state){
case TCP_TLS1:
state=TLS2;
break;
case OTHER_PROTO:
break;
case UDP1:
case UDP2:
case FIN_UDP:
case TCP2:
case FIN_TCP:
case TLS2:
case FIN_TLS:
case SCTP1:
case SCTP2:
case SCTP3:
case FIN_SCTP:
state=OTHER_PROTO;
break;
default:
LOG(L_ERR, "ERROR: parse_via: bad char <%c> on"
" 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;
case OTHER_PROTO:
break;
case UDP1:
case UDP2:
case FIN_UDP:
case TCP_TLS1:
case TCP2:
case FIN_TCP:
case TLS2:
case FIN_TLS:
case SCTP1:
case SCTP2:
case SCTP3:
case FIN_SCTP:
state=OTHER_PROTO;
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;
case OTHER_PROTO:
break;
case UDP1:
case UDP2:
case FIN_UDP:
case TCP_TLS1:
case TCP2:
case FIN_TCP:
case TLS2:
case FIN_TLS:
case SCTP1:
case SCTP2:
case SCTP3:
case FIN_SCTP:
state=OTHER_PROTO;
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;
case OTHER_PROTO:
break;
case UDP1:
case UDP2:
case FIN_UDP:
case TCP_TLS1:
case TCP2:
case FIN_TCP:
case TLS2:
case FIN_TLS:
case SCTP1:
case SCTP2:
case SCTP3:
case FIN_SCTP:
state=OTHER_PROTO;
break;
default:
LOG(L_ERR, "ERROR: parse_via: bad char <%c> on"
" state %d\n", *tmp, state);
goto error;
}
break;
default:
switch(state){
case F_PROTO:
state=OTHER_PROTO;
vb->transport.s=tmp;
break;
case OTHER_PROTO:
break;
case UDP1:
case UDP2:
case FIN_UDP:
case TCP_TLS1:
case TCP2:
case FIN_TCP:
case TLS2:
case FIN_TLS:
case SCTP1:
case SCTP2:
case SCTP3:
case FIN_SCTP:
state=OTHER_PROTO;
break;
default:
LOG(L_ERR, "ERROR: parse_via: bad char <%c> on"
" state %d\n", *tmp, state);
goto error;
}
break;
}
} /* for tmp*/
/* we should not be here! if everything is ok > main_via*/
LOG(L_ERR, "ERROR: parse_via: bad via: end of packet on state=%d\n",
state);
goto error;
main_via:
/* inc tmp to point to the next char*/
tmp++;
c_nest=0;
/*state should always be F_HOST here*/;
for(;*tmp;tmp++){
switch(*tmp){
case ' ':
case '\t':
switch(state){
case F_HOST:/*eat the spaces*/
break;
case P_HOST:
/*mark end of host*/
vb->host.len=tmp-vb->host.s;
state=L_PORT;
break;
case L_PORT: /*eat the spaces*/
case F_PORT:
break;
case P_PORT:
/*end of port */
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;
case F_IP6HOST: /*no spaces allowed*/
case P_IP6HOST:
LOG(L_ERR, "ERROR:parse_via: bad ipv6 reference\n");
goto error;
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:
/*mark end of host*/
vb->host.len=tmp-vb->host.s;
saved_state=L_PORT;
state=F_LF;
break;
case P_PORT:
/*end of port */
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:
/*mark end of host*/
vb->host.len=tmp-vb->host.s;
saved_state=L_PORT;
state=F_CR;
break;
case P_PORT:
/*end of port */
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:
state=P_IP6HOST;
break;
case P_IP6HOST:
break;
case P_HOST:
/*mark end of host*/
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 F_PORT:
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;
param_start=tmp+1;
break;
case P_PORT:
/*mark the end*/
vb->port_str.len=tmp-vb->port_str.s;
case L_PORT:
case L_PARAM:
state=F_PARAM;
param_start=tmp+1;
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;
param_start=tmp+1;
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:
/*mark the end*/
vb->host.len=tmp-vb->host.s;
state=F_VIA;
break;
case P_PORT:
/*mark the end*/
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:
/*mark the end*/
vb->host.len=tmp-vb->host.s;
state=F_COMMENT;
c_nest++;
break;
case P_PORT:
/*mark the end*/
vb->port_str.len=tmp-vb->port_str.s;
state=F_COMMENT;
c_nest++;
break;
case P_PARAM:
/*mark the end*/
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:
vb->host.s=tmp; /* mark start here (include [])*/
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:
/*mark the end*/
vb->host.len=(tmp-vb->host.s)+1; /* include "]" */
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*/;
if(vb->params.s==0) vb->params.s=param_start;
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));
param->start=param_start;
tmp=parse_via_param(tmp, end, &state, &saved_state,
param, vb);
switch(state){
case F_PARAM:
param_start=tmp+1;
case L_PARAM:
case F_LF:
case F_CR:
break;
case F_VIA:
vb->params.len=param->start+param->size
-vb->params.s;
break;
case END_OF_HEADER:
vb->params.len=param->start+param->size
-vb->params.s;
break;
case PARAM_ERROR:
pkg_free(param);
goto error;
default:
pkg_free(param);
LOG(L_ERR, "ERROR: parse_via after"
" parse_via_param: invalid"
" char <%c> on state %d\n",
*tmp, state);
goto error;
}
/*add param to the list*/
if (vb->last_param) vb->last_param->next=param;
else vb->param_lst=param;
vb->last_param=param;
/* update param. shortcuts */
switch(param->type){
case PARAM_BRANCH:
vb->branch=param;
break;
case PARAM_RECEIVED:
vb->received=param;
break;
case PARAM_RPORT:
vb->rport=param;
break;
case PARAM_I:
vb->i=param;
break;
case PARAM_ALIAS:
vb->alias=param;
break;
#ifdef USE_COMP
case PARAM_COMP:
vb->comp=param;
/* moved comp value parsing in via_param */
/*
if ((param->value.len==SIGCOMP_NAME_LEN) &&
(strncasecmp(param->value.s, SIGCOMP_NAME,
SIGCOMP_NAME_LEN)==0)){
vb->comp_no=COMP_SIGCOMP;
}else if ((param->value.len==SERGZ_NAME_LEN) &&
(strncasecmp(param->value.s,
SERGZ_NAME,
SERGZ_NAME_LEN)==0)){
vb->comp_no=COMP_SERGZ;
}else{
LOG(L_ERR, "ERROR: parse_via: unrecognized"
" compression method in comp=%.*s\n",
param->value.len, param->value.s);
}
*/
break;
#endif
}
if (state==END_OF_HEADER){
state=saved_state;
goto endofheader;
}
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;
}
}
}
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;
}
/*
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);*/
vb->error=PARSE_OK;
vb->bsize=tmp-buffer;
if (vb->port_str.s){
vb->port=str2s(vb->port_str.s, vb->port_str.len, &err);
if (err){
LOG(L_ERR, "ERROR: parse_via: invalid port number <%.*s>\n",
vb->port_str.len, ZSW(vb->port_str.s));
goto error;
}
}
return tmp;
nextvia:
DBG("parse_via: next_via\n");
vb->error=PARSE_OK;
vb->bsize=tmp-buffer;
if (vb->port_str.s){
vb->port=str2s(vb->port_str.s, vb->port_str.len, &err);
if (err){
LOG(L_ERR, "ERROR: parse_via: invalid port number <%.*s>\n",
vb->port_str.len, ZSW(vb->port_str.s));
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:
if (end>buffer){
LOG(L_ERR, "ERROR: parse_via on: <%.*s>\n", (int)(end-buffer), ZSW(buffer));
}
if ((tmp>buffer)&&(tmp<end)){
LOG(L_ERR, "ERROR: parse_via parse error, parsed so far:<%.*s>\n",
(int)(tmp-buffer), ZSW(buffer) );
}else{
LOG(L_ERR, "ERROR: parse_via: via parse error\n");
}
vb->error=PARSE_ERROR;
vbody->error=PARSE_ERROR; /* make sure the first via body is marked
as bad also */
return tmp;
}
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);
}
}
int parse_via_header( struct sip_msg *msg, int n, struct via_body** q)
{
struct hdr_field *p;
struct via_body *pp = NULL;
int i;
switch (n) {
case 1:
case 2:
if (!msg->h_via1 && (parse_headers(msg,HDR_VIA_F,0)==-1 || !msg->h_via1)) {
DBG("bad msg or missing VIA1 header \n");
return -1;
}
pp = msg->h_via1->parsed;
if (n==1) break;
pp = pp->next;
if (pp) break;
if (!msg->h_via2 && (parse_headers(msg,HDR_VIA2_F,0)==-1 || !msg->h_via2)) {
DBG("bad msg or missing VIA2 header \n");
return -1;
}
pp = msg->h_via2->parsed;
break;
default:
if (!msg->eoh && (parse_headers(msg,HDR_EOH_F,0)==-1 || !msg->eoh)) {
ERR("bad msg while parsing to EOH \n");
return -1;
}
p = msg->h_via1;
i = n;
while (i && p) {
if (p->type == HDR_VIA_T) {
i--;
pp = p->parsed;
while (i && (pp->next)) {
i--;
pp = pp->next;
}
}
p = p->next;
}
if (i > 0) {
DBG("missing VIA[%d] header\n", n);
return -1;
}
}
if (pp) {
*q = pp;
return 0;
} else
return -1;
}
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