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91 lines
2.7 KiB
91 lines
2.7 KiB
/*
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* mangler module
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*
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* Copyright (C) 2001-2003 FhG Fokus
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*
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* This file is part of Kamailio, a free SIP server.
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*
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* Kamailio 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
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*
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* Kamailio 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/* TO DO: precompiled expresions */
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#ifndef SDP_MANGLER_H
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#define SDP_MANGLER_H
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#include "../../parser/msg_parser.h" /* struct sip_msg */
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#include "common.h"
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#include <regex.h>
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/* With STRICT_CHECK off:
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If you define a port like 41231311 and BEST_EFFORT is defined it will
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consider a port the first 5 digits
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Similarly an ip like 12.31.12.313131132131 will be mangled with only 3 digits
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from the last group
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*/
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#ifdef STRICT_CHECK
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#define PORT_REGEX "(m=[a-z]+ [0-9]{1,5} )"
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#define IP_REGEX "(c=IN IP4 [0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}( |\n|\r))"
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#endif
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#ifndef STRICT_CHECK
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#define PORT_REGEX "m=[a-z]+ [0-9]{1,5}"
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#define IP_REGEX "(c=IN IP4 [0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3})"
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#endif
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#define MIN_ORIGINAL_PORT 1
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#define MAX_ORIGINAL_PORT 65535
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#define MIN_MANGLED_PORT 1
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#define MAX_MANGLED_PORT 65535
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#define MIN_OFFSET_VALUE -65535
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#define MAX_OFFSET_VALUE 65535
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extern regex_t *portExpression;
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extern regex_t *ipExpression;
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/* replaces all appearances of a port in lines like m=audio port with
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a new value for port which is oldvalue+offset
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@param msg a pointer to a sip message
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@param offset value of an offset.Must be a numeric format like "-12345"
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@param unused unused parameter
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@return negative in case of error or number of replacements - 1
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*/
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int sdp_mangle_port (struct sip_msg *msg, char *offset, char *unused);
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/* may replace all appearances of an ip in lines like c=IN IP4 ip with
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a new value for ip if the found ip matches the filter
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@param msg a pointer to a sip message
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@param oldip an filter for ip's in form ip/mask.Example
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of oldip "10.0.0.0/255.0.0.0" or "10.0.0.0/8"
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@param newip the ip replacing old ip
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@return negative in case of error or number of replacements - 1
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*/
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int sdp_mangle_ip (struct sip_msg *msg, char *oldip, char *newip);
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int compile_expresions(char *port,char *ip);
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int free_compiled_expresions();
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#endif
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