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391 lines
6.7 KiB
391 lines
6.7 KiB
/*
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* Copyright (C) 2011 Raphael Coeffic
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* 2012 Frafos GmbH
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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_nameaddr.h"
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#include "parse_common.h"
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#include "log.h"
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#include <assert.h>
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sip_nameaddr::~sip_nameaddr()
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{
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free_gen_params(¶ms);
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}
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int parse_nameaddr(sip_nameaddr* na, const char** c, int len)
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{
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enum {
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NA_SWS,
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NA_MAYBE_URI,
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NA_MAYBE_URI_END,
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NA_DISP,
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NA_DISP_QUOTED,
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NA_DISP_LAQUOT,
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NA_URI
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};
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const char* beg = *c;
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const char* end = *c + len;
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const char* uri_end=0;
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int saved_st=0, st=NA_SWS;
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//int ret=0;
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for(;*c!=end;(*c)++){
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switch(st){
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case NA_SWS:
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switch(**c){
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case '\"':
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st = NA_DISP_QUOTED;
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beg = *c;
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break;
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case '<':
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st = NA_URI;
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beg = *c+1;
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break;
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case CR:
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case 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 = NA_MAYBE_URI;
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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 NA_MAYBE_URI:
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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 = NA_MAYBE_URI_END;
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uri_end = *c;
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break;
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case '<':
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st = NA_URI;
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na->name.set(beg, *c - beg);
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beg = *c+1;
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break;
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case ';':
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na->addr.set(beg, *c - beg);
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return parse_gen_params_sc(&na->params,c, end-*c, 0);
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}
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break;
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case NA_MAYBE_URI_END:
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switch(**c){
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case_CR_LF;
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case ';':
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na->addr.set(beg, uri_end - beg);
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return parse_gen_params_sc(&na->params,c, end-*c, 0);
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case '<':
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st = NA_URI;
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na->name.set(beg, uri_end - beg);
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beg = *c+1;
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break;
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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 = NA_DISP;
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break;
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}
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break;
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case NA_DISP:
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switch(**c){
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case '\"':
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st = NA_DISP_QUOTED;
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beg = *c;
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break;
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case '<':
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st = NA_URI;
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na->name.set(beg, *c - beg);
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beg = *c+1;
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break;
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}
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break;
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case NA_DISP_QUOTED:
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switch(**c){
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case '\"':
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st = NA_DISP_LAQUOT;
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na->name.set(beg, *c - beg + 1);
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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 NA_DISP_LAQUOT:
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switch(**c){
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case_CR_LF;
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case '<':
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st = NA_URI;
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beg = *c+1;
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break;
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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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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 NA_URI:
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if(**c == '>'){
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na->addr.set(beg, *c - beg);
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(*c)++;
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return parse_gen_params_sc(&na->params,c, end-*c, 0);
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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 NA_MAYBE_URI:
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saved_st = NA_MAYBE_URI_END;
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uri_end = *c - (st==ST_CRLF?2:1);
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break;
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}
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st = saved_st;
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break;
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}
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}
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switch(st){
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case NA_MAYBE_URI:
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uri_end = *c;
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case NA_MAYBE_URI_END:
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na->addr.set(beg, uri_end - beg);
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break;
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default:
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DBG("Incomplete name-addr (st=%i) <%.*s>\n",st,(int)(end-beg),beg);
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return MALFORMED_SIP_MSG;
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}
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return parse_gen_params_sc(&na->params,c, end-*c, 0);
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}
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int parse_nameaddr_uri(sip_nameaddr* na, const char** c, int len)
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{
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if(parse_nameaddr(na, c, len) < 0) {
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DBG("Parsing name-addr failed\n");
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return -1;
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}
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if(parse_uri(&na->uri,na->addr.s,na->addr.len) < 0) {
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DBG("Parsing uri failed\n");
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return -1;
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}
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return 0;
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}
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static int skip_2_next_nameaddr(const char*& c,
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const char*& na_end,
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const char* end)
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{
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assert(c && end && (c<=end));
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// detect beginning of next nameaddr
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enum {
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RR_BEGIN=0,
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RR_QUOTED,
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RR_SWS,
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RR_SEP_SWS, // space(s) after ','
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RR_NXT_NA
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};
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int st = RR_BEGIN;
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na_end = NULL;
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for(;c<end;c++){
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switch(st){
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case RR_BEGIN:
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switch(*c){
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case SP:
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case HTAB:
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case CR:
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case LF:
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st = RR_SWS;
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na_end = c;
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break;
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case COMMA:
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st = RR_SEP_SWS;
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na_end = c;
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break;
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case DQUOTE:
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st = RR_QUOTED;
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break;
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}
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break;
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case RR_QUOTED:
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switch(*c){
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case BACKSLASH:
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if(++c == end) goto error;
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break;
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case DQUOTE:
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st = RR_BEGIN;
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break;
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}
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break;
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case RR_SWS:
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switch(*c){
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case SP:
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case HTAB:
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case CR:
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case LF:
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break;
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case COMMA:
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st = RR_SEP_SWS;
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break;
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default:
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st = RR_BEGIN;
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na_end = NULL;
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break;
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}
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break;
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case RR_SEP_SWS:
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switch(*c){
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case SP:
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case HTAB:
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case CR:
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case LF:
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break;
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default:
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st = RR_NXT_NA;
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goto nxt_nameaddr;
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}
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break;
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}
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}
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nxt_nameaddr:
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error:
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switch(st){
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case RR_QUOTED:
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DBG("Malformed nameaddr\n");
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return -1;
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case RR_SEP_SWS: // not fine, but acceptable
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case RR_BEGIN: // end of route header
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na_end = c;
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return 0;
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case RR_NXT_NA:
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return 1; // next nameaddr available
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}
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// should never be reached
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// makes GCC happy
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return 0;
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}
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int parse_nameaddr_list(list<cstring>& nas, const char* c, int len)
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{
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const char* end = c + len;
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const char* na_end = NULL;
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while(c < end) {
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const char* na_begin = c;
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int err = skip_2_next_nameaddr(c,na_end,end);
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if(err < 0){
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ERROR("While parsing nameaddr list ('%.*s')\n",len,na_begin);
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return -1;
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}
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if(na_end) {
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nas.push_back(cstring(na_begin, na_end-na_begin));
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}
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if(err == 0)
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break;
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}
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return 0;
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}
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int parse_first_nameaddr(sip_nameaddr* na, const char* c, int len)
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{
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const char* tmp_c = c;
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const char* end = c + len;
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const char* na_end = NULL;
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const char* na_begin = c;
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int err = skip_2_next_nameaddr(tmp_c,na_end,end);
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if(err < 0){
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ERROR("While parsing first nameaddr ('%.*s')\n",len,c);
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return -1;
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}
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tmp_c = c;
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return parse_nameaddr(na,&tmp_c,na_end-tmp_c);
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}
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