108 lines
2.6 KiB
C
108 lines
2.6 KiB
C
/*
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* This file is part of the Sofia-SIP package
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*
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* Copyright (C) 2005 Nokia Corporation.
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*
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* Contact: Pekka Pessi <pekka.pessi@nokia.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public License
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* as published by the Free Software Foundation; either version 2.1 of
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* the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*
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*/
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/**@CFILE sip_time.c
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* @brief SIP time handling
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*
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* Functions for handling time and dates in SIP.
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*
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* @author Pekka Pessi <Pekka.Pessi@nokia.com>.
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*
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* @date Created: Wed Apr 11 18:57:06 2001 ppessi
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*/
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#include "config.h"
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#include <stddef.h>
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#include <stdlib.h>
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#include <string.h>
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#include <limits.h>
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#include <assert.h>
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#include "sofia-sip/sip_parser.h"
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#include <sofia-sip/sip_util.h>
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#include <sofia-sip/msg_date.h>
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#include <sofia-sip/su_time.h>
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/** Return current time as seconds since Epoch. */
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sip_time_t sip_now(void)
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{
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return su_now().tv_sec;
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}
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/**@ingroup sip_expires
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*
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* Calculate the expiration time for a SIP @Contact.
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*
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* @param m @Contact header
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* @param ex @Expires header
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* @param date @Date header
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* @param def default expiration time
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* @param now current time.
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*
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* @note If @a m is NULL, the function calculates the expiration time
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* based on the @Expires and @Date headers.
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*
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* @note If @a now is 0, the function gets the current time using sip_now().
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*
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* @return
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* The expiration time in seconds.
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*/
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sip_time_t sip_contact_expires(sip_contact_t const *m,
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sip_expires_t const *ex,
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sip_date_t const *date,
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sip_time_t def,
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sip_time_t now)
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{
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sip_time_t time = 0, delta = def;
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/* "Contact: *" */
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if (m && m->m_url->url_type == url_any)
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return 0;
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if (m && m->m_expires) {
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msg_param_t expires = m->m_expires;
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if (msg_date_delta_d(&expires, &time, &delta) < 0)
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return def;
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}
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else if (ex) {
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time = ex->ex_date;
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delta = ex->ex_delta;
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}
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if (time) {
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if (date)
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now = date->d_time;
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else if (now == 0)
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now = sip_now();
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if (time > now)
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delta = time - now;
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else
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delta = 0;
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}
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return delta;
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}
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