forked from Mirrors/sngrep
141 lines
3.5 KiB
C
141 lines
3.5 KiB
C
/**************************************************************************
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**
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** sngrep - SIP Messages flow viewer
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**
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** Copyright (C) 2013,2014 Ivan Alonso (Kaian)
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** Copyright (C) 2013,2014 Irontec SL. All rights reserved.
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**
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** This program 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 3 of the License, or
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** (at your option) any later version.
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**
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** This program 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, see <http://www.gnu.org/licenses/>.
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**
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****************************************************************************/
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/**
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* @file option.h
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* @author Ivan Alonso [aka Kaian] <kaian@irontec.com>
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*
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* @brief Functions to manage filtering options
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*
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* There are two types of filters: capture and display.
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*
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* Capture filters are handled in capture functions and they limit the
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* number of calls are created in sip storage.
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*
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* Display filters are handled in this file and they limit the number of
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* calls that are displayed to the user. Multiple display filters can be
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* set at the same time. In order to be valid, a call MUST match all the
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* enabled filters to be shown.
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*
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*/
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#ifndef __SNGREP_FILTER_H_
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#define __SNGREP_FILTER_H_
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#include "config.h"
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#ifdef WITH_PCRE
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#include <pcre.h>
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#else
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#include <regex.h>
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#endif
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#include "sip.h"
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//! Shorter declaration of sip_call_group structure
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typedef struct filter filter_t;
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/**
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* @brief Available filter types
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*/
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enum filter_type {
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//! SIP From header in packet payload
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FILTER_SIPFROM = 0,
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//! SIP To header in packet payload
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FILTER_SIPTO,
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//! Packet source address
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FILTER_SOURCE,
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//! Packet destination address
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FILTER_DESTINATION,
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//! SIP Method in packet payload
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FILTER_METHOD,
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//! SIP Payload in any call packet
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FILTER_PAYLOAD,
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//! Displayed line in call list
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FILTER_CALL_LIST,
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//! Number of available filter types
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FILTER_COUNT,
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};
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/**
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* @brief Filter information
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*/
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struct filter {
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//! The filter text
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char *expr;
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#ifdef WITH_PCRE
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//! The filter compiled expression
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pcre *regex;
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#else
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//! The filter compiled expression
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regex_t regex;
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#endif
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};
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/**
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* @brief Set a given filter expression
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*
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* This function is used to set the filter expression
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* on a given filter. If given expression is NULL
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* the filter will be removed.
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*
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* @param type Type of the filter
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* @param expr Regexpression to match
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* @return 0 if the filter is valid, 1 otherwise
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*/
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int
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filter_set(int type, const char *expr);
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/**
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* @brief Get filter text expression
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*
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* @param type filter type
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* @return filter text expressions
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*/
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const char *
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filter_get(int type);
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/**
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* @brief Check if a call if filtered
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*
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* @param call Call to be checked
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* @return 1 if call is filtered
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*/
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int
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filter_check_call(void *item);
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/**
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* @brief Check if data matches the filter regexp
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*
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* @return 0 if the given data matches the filter
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*/
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int
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filter_check_expr(filter_t filter, const char *data);
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/**
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* @brief Reset filtered flag in all calls
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*
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* This function can be used to force reevaluation
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* of filters in all calls.
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*/
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void
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filter_reset_calls();
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#endif /* __SNGREP_FILTER_H_ */
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