rtpp_defines.h

/*
 * Copyright (c) 2004-2006 Maxim Sobolev <sobomax@FreeBSD.org>
 * Copyright (c) 2006-2007 Sippy Software, Inc., http://www.sippysoft.com
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 */

#ifndef _RTPP_DEFINES_H_
#define _RTPP_DEFINES_H_

#include "config.h"

#include <sys/types.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <netinet/in.h>
#include <poll.h>
#ifdef HAVE_STDINT_H
#include <stdint.h>
#endif

#include "rtpp_log.h"

/*
 * Version of the command protocol, bump only when backward-incompatible
 * change is introduced
 */
#define	CPROTOVER	20040107

#define	PORT_MIN	35000
#define	PORT_MAX	65000
#define	TIMETICK	1.0	/* in seconds */
#define	SESSION_TIMEOUT	60	/* in ticks */
#define	TOS		0xb8
#define	LBR_THRS	128	/* low-bitrate threshold */
#define	CPORT		"22222"
#define	POLL_LIMIT	200	/* maximum number of poll(2) calls per second */
#define	UPDATE_WINDOW	10.0	/* in seconds */

/* Dummy service, getaddrinfo needs it */
#define	SERVICE		"34999"

#define	CMD_SOCK	"/var/run/rtpproxy.sock"
#define	PID_FILE	"/var/run/rtpproxy.pid"

/*
 * TTL counters are used to detect the absence of audio packets
 * in either direction.  When the counter reaches 0, the call timeout
 * occurs.
 */ 
typedef enum {
    TTL_UNIFIED = 0,		/* all TTL counters must reach 0 */
    TTL_INDEPENDENT = 1		/* any TTL counter reaches 0 */
} rtpp_ttl_mode;

struct bindaddr_list {
    struct sockaddr_storage bindaddr;
    struct bindaddr_list *next;
};

struct cfg {
    struct cfg_stable {
        int nodaemon;
        int dmode;
        int bmode;			/* Bridge mode */
        int umode;			/* UDP control mode */
        int port_min;		/* Lowest UDP port for RTP */
        int port_max;		/* Highest UDP port number for RTP */
        int max_ttl;
        /*
         * The first address is for external interface, the second one - for
         * internal one. Second can be NULL, in this case there is no bridge
         * mode enabled.
         */
        struct sockaddr *bindaddr[2];	/* RTP socket(s) addresses */
		char *advaddr[2]; /* advertised addresses */
        int tos;

        const char *rdir;
        const char *sdir;
        int record_pcap;		/* Record in the PCAP format? */
        int record_all;		/* Record everything */

        int rrtcp;			/* Whether or not to relay RTCP? */
        rtpp_log_t glog;

        struct rlimit nofile_limit;
        char *run_uname;
        char *run_gname;
        int no_check;

        rtpp_ttl_mode ttl_mode;

        uid_t run_uid;
        gid_t run_gid;

        int log_level;
        int log_facility;

        uint16_t port_table[65536];
        int port_table_len;

        uint8_t rand_table[256];

        int controlfd;
    } stable;

    /*
     * Data fields that must be locked separately from the main configuration
     * structure below.
     */
    struct {
        struct pollfd *pfds;
        struct rtpp_session **sessions;
        int nsessions;
        pthread_mutex_t lock;
    } sessinfo;

    struct bindaddr_list *bindaddr_list;
    pthread_mutex_t bindaddr_lock;

    /* Structures below are protected by the glock */
    struct rtpp_session **rtp_servers;

    int rtp_nsessions;
    int sessions_active;
    unsigned long long sessions_created;
    int nofile_limit_warned;

    struct rtpp_session *hash_table[256];

    const char *timeout_socket;
    struct rtpp_timeout_handler *timeout_handler;

    int port_table_idx;

    pthread_mutex_t glock;
};

#endif