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344 lines
6.2 KiB
344 lines
6.2 KiB
/*
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* $Id: parse_common.cpp 850 2008-04-04 21:29:36Z sayer $
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*
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* Copyright (C) 2007 Raphael Coeffic
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*
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* This file is part of SEMS, a free SIP media server.
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*
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* SEMS is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version. This program is released under
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* the GPL with the additional exemption that compiling, linking,
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* and/or using OpenSSL is allowed.
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*
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* For a license to use the SEMS software under conditions
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* other than those described here, or to purchase support for this
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* software, please contact iptel.org by e-mail at the following addresses:
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* info@iptel.org
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*
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* SEMS is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "parse_common.h"
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#include "log.h"
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#include <string.h>
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#include <memory>
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using std::unique_ptr;
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int parse_sip_version(const char* beg, int len)
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{
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const char* c = beg;
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//char* end = c+len;
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if(len!=SIPVER_len){
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DBG("SIP-Version string length != SIPVER_len\n");
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return MALFORMED_SIP_MSG;
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}
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if( ((c[0] != 'S')&&(c[0] != 's')) ||
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((c[1] != 'I')&&(c[1] != 'i')) ||
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((c[2] != 'P')&&(c[2] != 'p')) ) {
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DBG("SIP-Version does not begin with \"SIP\"\n");
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return MALFORMED_SIP_MSG;
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}
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c += SIP_len;
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if(memcmp(c,SUP_SIPVER,SUP_SIPVER_len) != 0){
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DBG("Unsupported or malformed SIP-Version\n");
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return MALFORMED_SIP_MSG;
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}
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//DBG("SIP-Version OK\n");
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return 0;
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}
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static int _parse_gen_params(list<sip_avp*>* params, const char** c,
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int len, char stop_char, bool beg_w_sc)
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{
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enum {
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VP_PARAM_SEP=0,
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VP_PARAM_SEP_SWS,
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VP_PNAME,
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VP_PNAME_EQU,
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VP_PNAME_EQU_SWS,
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VP_PVALUE,
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VP_PVALUE_QUOTED
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};
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const char* beg = *c;
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const char* end = beg+len;
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int saved_st=0;
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int st = beg_w_sc ? VP_PARAM_SEP : VP_PARAM_SEP_SWS;
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unique_ptr<sip_avp> avp(new sip_avp());
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for(;*c!=end;(*c)++){
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switch(st){
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case VP_PARAM_SEP:
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switch(**c){
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case_CR_LF;
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case SP:
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case HTAB:
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break;
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case ';':
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st = VP_PARAM_SEP_SWS;
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break;
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default:
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if(**c == stop_char){
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return 0;
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}
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DBG("';' expected, found '%c'\n",**c);
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return MALFORMED_SIP_MSG;
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}
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break;
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case VP_PARAM_SEP_SWS:
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switch(**c){
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case_CR_LF;
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case SP:
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case HTAB:
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break;
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default:
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st = VP_PNAME;
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beg=*c;
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break;
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}
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break;
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case VP_PNAME:
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switch(**c){
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case_CR_LF;
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case SP:
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case HTAB:
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st = VP_PNAME_EQU;
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avp->name.set(beg,*c-beg);
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break;
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case '=':
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st = VP_PNAME_EQU_SWS;
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avp->name.set(beg,*c-beg);
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break;
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case ';':
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st = VP_PARAM_SEP_SWS;
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avp->name.set(beg,*c-beg);
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params->push_back(avp.release());
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avp.reset(new sip_avp());
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break;
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default:
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if(**c == stop_char){
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avp->name.set(beg,*c-beg);
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params->push_back(avp.release());
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return 0;
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}
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break;
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}
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break;
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case VP_PNAME_EQU:
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switch(**c){
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case_CR_LF;
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case SP:
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case HTAB:
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break;
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case '=':
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st = VP_PNAME_EQU_SWS;
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break;
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case ';':
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st = VP_PARAM_SEP_SWS;
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params->push_back(avp.release());
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avp.reset(new sip_avp());
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break;
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default:
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if(**c == stop_char){
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params->push_back(avp.release());
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return 0;
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}
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DBG("'=' expected\n");
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return MALFORMED_SIP_MSG;
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}
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case VP_PNAME_EQU_SWS:
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switch(**c){
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case_CR_LF;
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case SP:
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case HTAB:
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break;
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case '\"':
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st = VP_PVALUE_QUOTED;
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beg = *c;
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break;
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case ';':
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st = VP_PARAM_SEP_SWS;
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params->push_back(avp.release());
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avp.reset(new sip_avp());
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break;
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default:
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st = VP_PVALUE;
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beg = *c;
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break;
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}
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break;
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case VP_PVALUE:
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switch(**c){
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case_CR_LF;
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case '\"':
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st = VP_PVALUE_QUOTED;
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break;
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case ';':
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st = VP_PARAM_SEP_SWS;
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avp->value.set(beg,*c-beg);
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params->push_back(avp.release());
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avp.reset(new sip_avp());
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break;
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default:
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if(**c == stop_char){
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avp->value.set(beg,*c-beg);
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params->push_back(avp.release());
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return 0;
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}
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break;
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}
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break;
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case VP_PVALUE_QUOTED:
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switch(**c){
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case_CR_LF;
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case '\"':
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st = VP_PARAM_SEP;
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avp->value.set(beg,*c+1-beg);
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params->push_back(avp.release());
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avp.reset(new sip_avp());
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break;
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case '\\':
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if(!*(++(*c))){
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DBG("Escape char in quoted str at EoT!!!\n");
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return MALFORMED_SIP_MSG;
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}
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break;
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}
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break;
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case_ST_CR(**c);
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case ST_LF:
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case ST_CRLF:
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switch(saved_st){
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case VP_PNAME:
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saved_st = VP_PNAME_EQU;
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avp->name.set(beg,*c-(st==ST_CRLF?2:1)-beg);
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break;
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case VP_PVALUE:
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saved_st = VP_PARAM_SEP;
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avp->value.set(beg,*c-(st==ST_CRLF?2:1)-beg);
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params->push_back(avp.release());
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avp.reset(new sip_avp());
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break;
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}
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st = saved_st;
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}
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}
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switch(st){
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case VP_PNAME:
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avp->name.set(beg,*c-beg);
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params->push_back(avp.release());
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break;
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case VP_PVALUE:
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avp->value.set(beg,*c-beg);
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params->push_back(avp.release());
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break;
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case VP_PARAM_SEP:
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case VP_PARAM_SEP_SWS:
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break;
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case VP_PNAME_EQU:
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case VP_PNAME_EQU_SWS:
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params->push_back(avp.release());
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break;
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default:
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DBG("Wrong state: st=%i\n",st);
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return MALFORMED_SIP_MSG;
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}
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return 0;
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}
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int parse_gen_params_sc(list<sip_avp*>* params, const char** c,
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int len, char stop_char)
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{
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return _parse_gen_params(params,c,len,stop_char,true);
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}
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int parse_gen_params(list<sip_avp*>* params, const char** c,
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int len, char stop_char)
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{
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return _parse_gen_params(params,c,len,stop_char,false);
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}
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void free_gen_params(list<sip_avp*>* params)
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{
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while(!params->empty()) {
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delete params->front();
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params->pop_front();
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}
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}
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/** EMACS **
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* Local variables:
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* mode: c++
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* c-basic-offset: 4
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* End:
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*/
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