2343 lines
67 KiB
C
Executable File
2343 lines
67 KiB
C
Executable File
/*
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* Asterisk -- A telephony toolkit for Linux.
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*
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* Implementation of Inter-Asterisk eXchange
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*
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* Copyright (C) 1999, Mark Spencer
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*
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* Mark Spencer <markster@linux-support.net>
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License
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*/
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#include <asterisk/frame.h>
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#include <asterisk/channel.h>
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#include <asterisk/channel_pvt.h>
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#include <asterisk/logger.h>
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#include <asterisk/module.h>
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#include <asterisk/pbx.h>
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#include <asterisk/sched.h>
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#include <asterisk/io.h>
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#include <asterisk/config.h>
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#include <asterisk/options.h>
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#include <asterisk/cli.h>
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#include <asterisk/translate.h>
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#include <asterisk/md5.h>
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#include <arpa/inet.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <sys/time.h>
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#include <sys/signal.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include <unistd.h>
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#include <netdb.h>
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#include "iax.h"
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#define DEFAULT_RETRY_TIME 1000
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#define MEMORY_SIZE 100
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#define DEFAULT_DROP 3
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/* If you want to use the simulator, then define IAX_SIMULATOR. */
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/*
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#define IAX_SIMULATOR
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*/
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static char *desc = "Inter Asterisk eXchange";
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static char *tdesc = "Inter Asterisk eXchange Drver";
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static char *type = "IAX";
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static char *config = "iax.conf";
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static char context[80] = "default";
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static int max_retries = 4;
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static int ping_time = 20;
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static int lagrq_time = 10;
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static int nextcallno = 0;
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static int maxjitterbuffer=4000;
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static int netsocket = -1;
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static int usecnt;
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static pthread_mutex_t usecnt_lock = PTHREAD_MUTEX_INITIALIZER;
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static pthread_mutex_t iaxs_lock = PTHREAD_MUTEX_INITIALIZER;
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/* Ethernet, etc */
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#define IAX_CAPABILITY_FULLBANDWIDTH 0x7FFFFFFF
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/* T1, maybe ISDN */
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#define IAX_CAPABILITY_MEDBANDWIDTH (IAX_CAPABILITY_FULLBANDWIDTH & \
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~AST_FORMAT_SLINEAR & \
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~AST_FORMAT_ULAW & \
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~AST_FORMAT_ALAW)
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/* A modem */
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#define IAX_CAPABILITY_LOWBANDWIDTH (IAX_CAPABILITY_MEDBANDWIDTH & \
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~AST_FORMAT_MP3 & \
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~AST_FORMAT_ADPCM)
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#define IAX_CAPABILITY_LOWFREE (IAX_CAPABILITY_LOWBANDWIDTH & \
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~AST_FORMAT_G723_1)
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static struct io_context *io;
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static struct sched_context *sched;
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static int iax_capability = IAX_CAPABILITY_FULLBANDWIDTH;
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static int iax_dropcount = DEFAULT_DROP;
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static int use_jitterbuffer = 1;
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static pthread_t netthreadid;
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#define IAX_STATE_STARTED (1 << 0)
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#define IAX_STATE_AUTHENTICATED (1 << 1)
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#define IAX_SENSE_DENY 0
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#define IAX_SENSE_ALLOW 1
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struct iax_ha {
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/* Host access rule */
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struct in_addr netaddr;
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struct in_addr netmask;
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int sense;
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struct iax_ha *next;
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};
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struct iax_context {
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char context[AST_MAX_EXTENSION];
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struct iax_context *next;
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};
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struct iax_user {
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char name[80];
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char secret[80];
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char methods[80];
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struct iax_ha *ha;
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struct iax_context *contexts;
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struct iax_user *next;
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};
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struct iax_peer {
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char name[80];
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char username[80];
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char secret[80];
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struct sockaddr_in addr;
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int formats;
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struct in_addr mask;
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/* Dynamic Registration fields */
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int dynamic;
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struct sockaddr_in defaddr;
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char regsecret[80];
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char methods[80];
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struct timeval nexpire;
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int expire;
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struct iax_ha *ha;
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struct iax_peer *next;
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};
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/* Don't retry more frequently than every 10 ms, or less frequently than every 5 seconds */
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#define MIN_RETRY_TIME 10
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#define MAX_RETRY_TIME 10000
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#define MAX_JITTER_BUFFER 50
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/* If we have more than this much excess real jitter buffer, srhink it. */
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static int max_jitter_buffer = MAX_JITTER_BUFFER;
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struct chan_iax_pvt {
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/* Pipes for communication. pipe[1] belongs to the
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network thread (write), and pipe[0] belongs to the individual
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channel (read) */
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int pipe[2];
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/* Last received voice format */
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int voiceformat;
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/* Last sent voice format */
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int svoiceformat;
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/* Last received timestamp */
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unsigned int last;
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/* Last sent timestamp - never send the same timestamp twice in a single call */
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unsigned int lastsent;
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/* Ping time */
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unsigned int pingtime;
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/* Peer Address */
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struct sockaddr_in addr;
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/* Our call number */
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int callno;
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/* Peer callno */
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int peercallno;
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/* Peer supported formats */
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int peerformats;
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/* timeval that we base our transmission on */
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struct timeval offset;
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/* timeval that we base our delivery on */
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struct timeval rxcore;
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/* Historical delivery time */
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int history[MEMORY_SIZE];
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/* Current base jitterbuffer */
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int jitterbuffer;
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/* Current jitter measure */
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int jitter;
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/* LAG */
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int lag;
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/* Error, as discovered by the manager */
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int error;
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/* Onwer if we have one */
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struct ast_channel *owner;
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/* What's our state? */
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int state;
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/* Next outgoing sequence number */
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unsigned short oseqno;
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/* Next incoming sequence number */
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unsigned short iseqno;
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/* Peer name */
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char peer[80];
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/* Default Context */
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char context[80];
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/* Caller ID if available */
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char callerid[80];
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/* DNID */
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char dnid[80];
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/* Requested Extension */
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char exten[AST_MAX_EXTENSION];
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/* Expected Username */
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char username[80];
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/* Expected Secret */
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char secret[80];
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/* permitted authentication methods */
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char methods[80];
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/* MD5 challenge */
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char challenge[10];
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};
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struct ast_iax_frame {
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/* Actual, isolated frame */
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struct ast_frame *f;
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/* /Our/ call number */
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short callno;
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/* Start of raw frame (outgoing only) */
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void *data;
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/* Length of frame (outgoing only) */
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int datalen;
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/* How many retries so far? */
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int retries;
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/* Outgoing relative timestamp (ms) */
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unsigned int ts;
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/* How long to wait before retrying */
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int retrytime;
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/* Are we received out of order? */
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int outoforder;
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/* Have we been sent at all yet? */
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int sentyet;
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/* Packet sequence number */
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int seqno;
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/* Easy linking */
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struct ast_iax_frame *next;
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struct ast_iax_frame *prev;
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};
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static struct ast_iax_queue {
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struct ast_iax_frame *head;
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struct ast_iax_frame *tail;
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int count;
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pthread_mutex_t lock;
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} iaxq;
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static struct ast_user_list {
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struct iax_user *users;
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pthread_mutex_t lock;
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} userl;
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static struct ast_peer_list {
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struct iax_peer *peers;
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pthread_mutex_t lock;
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} peerl;
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/* XXX We probably should use a mutex when working with this XXX */
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static struct chan_iax_pvt *iaxs[AST_IAX_MAX_CALLS];
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static int send_command(struct chan_iax_pvt *, char, int, unsigned int, char *, int, int);
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static unsigned int calc_timestamp(struct chan_iax_pvt *p, unsigned int ts);
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static int send_ping(void *data)
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{
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int callno = (long)data;
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if (iaxs[callno]) {
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send_command(iaxs[callno], AST_FRAME_IAX, AST_IAX_COMMAND_PING, 0, NULL, 0, -1);
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return 1;
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} else
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return 0;
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}
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static int send_lagrq(void *data)
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{
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int callno = (long)data;
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if (iaxs[callno]) {
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send_command(iaxs[callno], AST_FRAME_IAX, AST_IAX_COMMAND_LAGRQ, 0, NULL, 0, -1);
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return 1;
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} else
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return 0;
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}
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static unsigned char compress_subclass(int subclass)
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{
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int x;
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int power=-1;
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/* If it's 128 or smaller, just return it */
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if (subclass < AST_FLAG_SC_LOG)
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return subclass;
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/* Otherwise find its power */
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for (x = 0; x < AST_MAX_SHIFT; x++) {
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if (subclass & (1 << x)) {
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if (power > -1) {
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ast_log(LOG_WARNING, "Can't compress subclass %d\n", subclass);
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return 0;
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} else
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power = x;
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}
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}
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return power | AST_FLAG_SC_LOG;
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}
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static int uncompress_subclass(unsigned char csub)
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{
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/* If the SC_LOG flag is set, return 2^csub otherwise csub */
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if (csub & AST_FLAG_SC_LOG)
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return 1 << (csub & ~AST_FLAG_SC_LOG & AST_MAX_SHIFT);
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else
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return csub;
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}
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static struct chan_iax_pvt *new_iax(void)
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{
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struct chan_iax_pvt *tmp;
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tmp = malloc(sizeof(struct chan_iax_pvt));
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if (tmp) {
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memset(tmp, 0, sizeof(struct chan_iax_pvt));
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/* On my linux system, pipe's are more than 2x as fast as socketpairs */
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if (pipe(tmp->pipe)) {
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ast_log(LOG_WARNING, "Unable to create pipe: %s\n", strerror(errno));
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free(tmp);
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return NULL;
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}
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tmp->callno = -1;
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tmp->peercallno = -1;
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/* strncpy(tmp->context, context, sizeof(tmp->context)); */
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strncpy(tmp->exten, "s", sizeof(tmp->exten));
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}
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return tmp;
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}
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static int get_timelen(struct ast_frame *f)
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{
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int timelen=0;
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switch(f->subclass) {
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case AST_FORMAT_G723_1:
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timelen = 30 /* XXX Not necessarily true XXX */;
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break;
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case AST_FORMAT_GSM:
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timelen = 20 * (f->datalen / 20);
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break;
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case AST_FORMAT_SLINEAR:
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timelen = f->datalen / 16;
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break;
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case AST_FORMAT_LPC10:
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timelen = 22;
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timelen += ((char *)(f->data))[7] & 0x1;
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break;
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case AST_FORMAT_ULAW:
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timelen = f->datalen / 8;
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break;
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case AST_FORMAT_ADPCM:
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timelen = f->datalen / 4;
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break;
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default:
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ast_log(LOG_WARNING, "Don't know how to calculate timelen on %d packets\n", f->subclass);
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}
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return timelen;
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}
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#if 0
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static struct ast_iax_frame *iaxfrdup(struct ast_iax_frame *fr)
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{
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/* Malloc() a copy of a frame */
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struct ast_iax_frame *new = malloc(sizeof(struct ast_iax_frame));
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if (new)
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memcpy(new, fr, sizeof(struct ast_iax_frame));
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return new;
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}
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#endif
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static struct ast_iax_frame *iaxfrdup2(struct ast_iax_frame *fr, int ch)
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{
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/* Malloc() a copy of a frame */
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struct ast_iax_frame *new = malloc(sizeof(struct ast_iax_frame));
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if (new) {
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memcpy(new, fr, sizeof(struct ast_iax_frame));
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new->f = ast_frdup(fr->f);
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/* Copy full header */
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if (ch) {
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memcpy(new->f->data - sizeof(struct ast_iax_full_hdr),
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fr->f->data - sizeof(struct ast_iax_full_hdr),
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sizeof(struct ast_iax_full_hdr));
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/* Grab new data pointer */
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new->data = new->f->data - (fr->f->data - fr->data);
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} else {
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new->data = NULL;
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new->datalen = 0;
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}
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}
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return new;
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}
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#define NEW_PREVENT 0
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#define NEW_ALLOW 1
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#define NEW_FORCE 2
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static int find_callno(short callno, short dcallno ,struct sockaddr_in *sin, int new)
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{
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int res = -1;
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int x;
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int start;
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if (new <= NEW_ALLOW) {
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/* Look for an existing connection first */
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for (x=0;x<AST_IAX_MAX_CALLS;x++) {
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if (iaxs[x]) {
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/* Look for an exact match */
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if ((sin->sin_port == iaxs[x]->addr.sin_port) &&
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(sin->sin_addr.s_addr == iaxs[x]->addr.sin_addr.s_addr) &&
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((callno == iaxs[x]->peercallno) || /* Our expected source call number is the same */
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((dcallno == x) && (iaxs[x]->peercallno = -1))
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/* We have no expected source number, and the destination is right */
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)) {
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res = x;
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break;
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}
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}
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}
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}
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if ((res < 0) && (new >= NEW_ALLOW)) {
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/* Create a new one */
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start = nextcallno;
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for (x = nextcallno + 1; iaxs[x] && (x != start); x = (x + 1) % AST_IAX_MAX_CALLS)
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if (x == start) {
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ast_log(LOG_WARNING, "Unable to accept more calls\n");
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return -1;
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}
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iaxs[x] = new_iax();
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if (iaxs[x]) {
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if (option_debug)
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ast_log(LOG_DEBUG, "Creating new call structure %d\n", x);
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iaxs[x]->addr.sin_port = sin->sin_port;
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iaxs[x]->addr.sin_family = sin->sin_family;
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iaxs[x]->addr.sin_addr.s_addr = sin->sin_addr.s_addr;
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iaxs[x]->peercallno = callno;
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iaxs[x]->callno = x;
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iaxs[x]->pingtime = DEFAULT_RETRY_TIME;
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ast_sched_add(sched, ping_time * 1000, send_ping, (void *)x);
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ast_sched_add(sched, lagrq_time * 1000, send_lagrq, (void *)x);
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} else
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ast_log(LOG_DEBUG, "Out of memory\n");
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res = x;
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nextcallno = x;
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}
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return res;
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}
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static int iax_send(struct chan_iax_pvt *pvt, struct ast_frame *f, unsigned int ts, int seqno);
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static int do_deliver(void *data)
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{
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/* Just deliver the packet by writing it to half of the pipe. */
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struct ast_iax_frame *fr = data;
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unsigned int ts;
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if (iaxs[fr->callno]) {
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if (fr->f->frametype == AST_FRAME_IAX) {
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/* We have to treat some of these packets specially because
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they're LAG measurement packets */
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if (fr->f->subclass == AST_IAX_COMMAND_LAGRQ) {
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/* If we got a queued request, build a reply and send it */
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fr->f->subclass = AST_IAX_COMMAND_LAGRP;
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iax_send(iaxs[fr->callno], fr->f, fr->ts, -1);
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} else if (fr->f->subclass == AST_IAX_COMMAND_LAGRP) {
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/* This is a reply we've been given, actually measure the difference */
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ts = calc_timestamp(iaxs[fr->callno], 0);
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iaxs[fr->callno]->lag = ts - fr->ts;
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}
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} else {
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ast_fr_fdwrite(iaxs[fr->callno]->pipe[1], fr->f);
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}
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}
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/* Free the packet */
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ast_frfree(fr->f);
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/* And our iax frame */
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free(fr);
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/* And don't run again */
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return 0;
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}
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static int handle_error()
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{
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/* XXX Ideally we should figure out why an error occured and then abort those
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rather than continuing to try. Unfortunately, the published interface does
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not seem to work XXX */
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#if 0
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struct sockaddr_in *sin;
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int res;
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struct msghdr m;
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struct sock_extended_err e;
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m.msg_name = NULL;
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m.msg_namelen = 0;
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m.msg_iov = NULL;
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m.msg_control = &e;
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m.msg_controllen = sizeof(e);
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m.msg_flags = 0;
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res = recvmsg(netsocket, &m, MSG_ERRQUEUE);
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if (res < 0)
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ast_log(LOG_WARNING, "Error detected, but unable to read error: %s\n", strerror(errno));
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else {
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if (m.msg_controllen) {
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sin = (struct sockaddr_in *)SO_EE_OFFENDER(&e);
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if (sin)
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ast_log(LOG_WARNING, "Receive error from %s\n", inet_ntoa(sin->sin_addr));
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else
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ast_log(LOG_WARNING, "No address detected??\n");
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} else {
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ast_log(LOG_WARNING, "Local error: %s\n", strerror(e.ee_errno));
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}
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}
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#endif
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return 0;
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}
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#ifdef IAX_SIMULATOR
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static int __send_packet(struct ast_iax_frame *f)
|
|
#else
|
|
static int send_packet(struct ast_iax_frame *f)
|
|
#endif
|
|
{
|
|
int res;
|
|
if (option_debug)
|
|
ast_log(LOG_DEBUG, "Sending %d on %d/%d to %s:%d\n", f->ts, f->callno, iaxs[f->callno]->peercallno, inet_ntoa(iaxs[f->callno]->addr.sin_addr), ntohs(iaxs[f->callno]->addr.sin_port));
|
|
/* Don't send if there was an error, but return error instead */
|
|
if (f->callno < 0) {
|
|
ast_log(LOG_WARNING, "Call number = %d\n", f->callno);
|
|
return -1;
|
|
}
|
|
if (iaxs[f->callno]->error)
|
|
return -1;
|
|
res = sendto(netsocket, f->data, f->datalen, 0, &iaxs[f->callno]->addr,
|
|
sizeof(iaxs[f->callno]->addr));
|
|
if (res < 0) {
|
|
ast_log(LOG_WARNING, "Received error: %s\n", strerror(errno));
|
|
handle_error();
|
|
} else
|
|
res = 0;
|
|
return res;
|
|
}
|
|
|
|
#ifdef IAX_SIMULATOR
|
|
|
|
/* Average amount of delay in the connection */
|
|
static int average_delay = 0;
|
|
/* Permitted deviation either side of the average delay */
|
|
static int delay_deviation = 0;
|
|
/* Percent chance that a packet arrives O.K. */
|
|
static int reliability = 100;
|
|
|
|
static int iax_sim_calc_delay()
|
|
{
|
|
int ms;
|
|
ms = average_delay - delay_deviation;
|
|
ms += ((float)(delay_deviation * 2)) * rand() / (RAND_MAX + 1.0);
|
|
if (ms < 0)
|
|
ms = 0;
|
|
if ((float)rand()/(RAND_MAX + 1.0) < ((float)reliability)/100)
|
|
return ms;
|
|
else
|
|
return -1;
|
|
}
|
|
|
|
static int d_send_packet(void *v)
|
|
{
|
|
struct ast_iax_frame *f = (struct ast_iax_frame *)v;
|
|
if (iaxs[f->callno])
|
|
__send_packet(f);
|
|
ast_frfree(f->f);
|
|
free(f);
|
|
return 0;
|
|
}
|
|
|
|
static int send_packet(struct ast_iax_frame *f)
|
|
{
|
|
struct ast_iax_frame *fn;
|
|
int ms;
|
|
ms = iax_sim_calc_delay();
|
|
if (ms == 0)
|
|
return __send_packet(f);
|
|
else if (ms > 0) {
|
|
/* Make a completely independent frame, in case the other
|
|
is destroyed -- still doesn't make things like hangups
|
|
arrive if the main channel is destroyed, but close enough */
|
|
fn = iaxfrdup2(f, 1);
|
|
ast_sched_add(sched, ms, d_send_packet, fn);
|
|
} /* else we drop the packet */
|
|
return 0;
|
|
}
|
|
|
|
static int iax_sim_set(int fd, int argc, char *argv[])
|
|
{
|
|
if (argc != 4)
|
|
return RESULT_SHOWUSAGE;
|
|
if (!strcasecmp(argv[2], "delay"))
|
|
average_delay = atoi(argv[3]);
|
|
else if (!strcasecmp(argv[2], "deviation"))
|
|
delay_deviation = atoi(argv[3]);
|
|
else if (!strcasecmp(argv[2], "reliability"))
|
|
reliability = atoi(argv[3]);
|
|
else
|
|
return RESULT_SHOWUSAGE;
|
|
if (reliability > 100)
|
|
reliability = 100;
|
|
if (reliability < 0)
|
|
reliability = 0;
|
|
if (delay_deviation > average_delay)
|
|
delay_deviation = average_delay;
|
|
return RESULT_SUCCESS;
|
|
}
|
|
|
|
static char delay_usage[] =
|
|
"Usage: sim set delay <value>\n"
|
|
" Configure the IAX network simulator to generate average\n"
|
|
" delays equal to the specified value (in milliseconds).\n";
|
|
|
|
static char deviation_usage[] =
|
|
"Usage: sim set deviation <value>\n"
|
|
" Configures the IAX network simulator's deviation value.\n"
|
|
" The delays generated by the simulator will always be within\n"
|
|
" this value of milliseconds (postive or negative) of the \n"
|
|
" average delay.\n";
|
|
|
|
static char reliability_usage[] =
|
|
"Usage: sim set reliability <value>\n"
|
|
" Configure the probability that a packet will be delivered.\n"
|
|
" The value specified is a percentage from 0 to 100\n";
|
|
|
|
static int iax_sim_show(int fd, int argc, char *argv[])
|
|
{
|
|
if (argc != 2)
|
|
return RESULT_SHOWUSAGE;
|
|
ast_cli(fd, "Average Delay: %d ms\n", average_delay);
|
|
ast_cli(fd, "Delay Deviation: %d ms\n", delay_deviation);
|
|
ast_cli(fd, "Reliability: %d %\n", reliability);
|
|
return RESULT_SUCCESS;
|
|
}
|
|
|
|
static char sim_show_usage[] =
|
|
"Usage: sim show\n"
|
|
" Displays average delay, deviation, and reliability\n"
|
|
" used by the network simulator.\n";
|
|
|
|
static struct ast_cli_entry delay_cli =
|
|
{ { "sim", "set", "delay", NULL }, iax_sim_set, "Sets simulated average delay", delay_usage };
|
|
static struct ast_cli_entry deviation_cli =
|
|
{ { "sim", "set", "deviation", NULL }, iax_sim_set, "Sets simulated delay deviation", deviation_usage };
|
|
static struct ast_cli_entry reliability_cli =
|
|
{ { "sim", "set", "reliability", NULL }, iax_sim_set, "Sets simulated reliability", reliability_usage };
|
|
static struct ast_cli_entry sim_show_cli =
|
|
{ { "sim", "show", NULL }, iax_sim_show, "Displays simulation parameters", sim_show_usage };
|
|
|
|
#endif
|
|
|
|
static int attempt_transmit(void *data)
|
|
{
|
|
/* Attempt to transmit the frame to the remote peer */
|
|
char zero = 0;
|
|
struct ast_iax_frame *f = data;
|
|
int res = 0;
|
|
/* Make sure this call is still active */
|
|
if (iaxs[f->callno]) {
|
|
if ((f->retries == -1) /* Already ACK'd */ ||
|
|
(f->retries >= max_retries) /* Too many attempts */) {
|
|
/* Record an error if we've transmitted too many times */
|
|
if (f->retries >= max_retries) {
|
|
ast_log(LOG_WARNING, "Max retries exceeded to host %s (type = %d, subclass = %d, ts=%d, seqno=%d)\n", inet_ntoa(iaxs[f->callno]->addr.sin_addr), f->f->frametype, f->f->subclass, f->ts, f->seqno);
|
|
iaxs[f->callno]->error = ETIMEDOUT;
|
|
/* Send a bogus frame to wake up the waiting process */
|
|
write(iaxs[f->callno]->pipe[1], &zero, 1);
|
|
}
|
|
/* Don't attempt delivery, just remove it from the queue */
|
|
pthread_mutex_lock(&iaxq.lock);
|
|
if (f->prev)
|
|
f->prev->next = f->next;
|
|
else
|
|
iaxq.head = f->next;
|
|
if (f->next)
|
|
f->next->prev = f->prev;
|
|
else
|
|
iaxq.tail = f->prev;
|
|
iaxq.count--;
|
|
pthread_mutex_unlock(&iaxq.lock);
|
|
} else {
|
|
/* Attempt transmission */
|
|
send_packet(f);
|
|
f->retries++;
|
|
/* Try again later after 10 times as long */
|
|
f->retrytime *= 10;
|
|
if (f->retrytime > MAX_RETRY_TIME)
|
|
f->retrytime = MAX_RETRY_TIME;
|
|
ast_sched_add(sched, f->retrytime, attempt_transmit, f);
|
|
res=0;
|
|
}
|
|
}
|
|
/* Do not try again */
|
|
return res;
|
|
}
|
|
|
|
static int iax_set_jitter(int fd, int argc, char *argv[])
|
|
{
|
|
if ((argc != 4) && (argc != 5))
|
|
return RESULT_SHOWUSAGE;
|
|
if (argc == 4) {
|
|
max_jitter_buffer = atoi(argv[3]);
|
|
if (max_jitter_buffer < 0)
|
|
max_jitter_buffer = 0;
|
|
} else {
|
|
if (argc == 5) {
|
|
pthread_mutex_lock(&iaxs_lock);
|
|
if ((atoi(argv[3]) >= 0) && (atoi(argv[3]) < AST_IAX_MAX_CALLS)) {
|
|
if (iaxs[atoi(argv[3])]) {
|
|
iaxs[atoi(argv[3])]->jitterbuffer = atoi(argv[4]);
|
|
if (iaxs[atoi(argv[3])]->jitterbuffer < 0)
|
|
iaxs[atoi(argv[3])]->jitterbuffer = 0;
|
|
} else
|
|
ast_cli(fd, "No such call '%d'\n", atoi(argv[3]));
|
|
} else
|
|
ast_cli(fd, "%d is not a valid call number\n", atoi(argv[3]));
|
|
pthread_mutex_unlock(&iaxs_lock);
|
|
}
|
|
}
|
|
return RESULT_SUCCESS;
|
|
}
|
|
|
|
static char jitter_usage[] =
|
|
"Usage: iax set jitter [callid] <value>\n"
|
|
" If used with a callid, it sets the jitter buffer to the given static\n"
|
|
"value (until its next calculation). If used without a callid, the value is used\n"
|
|
"to establish the maximum excess jitter buffer that is permitted before the jitter\n"
|
|
"buffer size is reduced.";
|
|
|
|
static struct ast_cli_entry cli_set_jitter =
|
|
{ { "iax", "set", "jitter", NULL }, iax_set_jitter, "Sets IAX jitter buffer", jitter_usage };
|
|
|
|
static unsigned int calc_rxstamp(struct chan_iax_pvt *p);
|
|
|
|
static int schedule_delivery(struct ast_iax_frame *fr)
|
|
{
|
|
/* XXX FIXME: I should delay delivery with a sliding jitter buffer XXX */
|
|
int ms,x;
|
|
int drops[MEMORY_SIZE];
|
|
int min, max=0, maxone=0,y,z, match;
|
|
/* ms is a measure of the "lateness" of the packet relative to the first
|
|
packet we received, which always has a lateness of 1. */
|
|
ms = calc_rxstamp(iaxs[fr->callno]) - fr->ts;
|
|
|
|
/* Rotate our history queue of "lateness". Don't worry about those initial
|
|
zeros because the first entry will always be zero */
|
|
for (x=0;x<MEMORY_SIZE - 1;x++)
|
|
iaxs[fr->callno]->history[x] = iaxs[fr->callno]->history[x+1];
|
|
/* Add a history entry for this one */
|
|
iaxs[fr->callno]->history[x] = ms;
|
|
|
|
/* Initialize the minimum to reasonable values. It's too much
|
|
work to do the same for the maximum, repeatedly */
|
|
min=iaxs[fr->callno]->history[0];
|
|
for (z=0;z < iax_dropcount + 1;z++) {
|
|
/* Start very pessimistic ;-) */
|
|
max=-999999999;
|
|
for (x=0;x<MEMORY_SIZE;x++) {
|
|
if (max < iaxs[fr->callno]->history[x]) {
|
|
/* We have a candidate new maximum value. Make
|
|
sure it's not in our drop list */
|
|
match = 0;
|
|
for (y=0;!match && (y<z);y++)
|
|
match |= (drops[y] == x);
|
|
if (!match) {
|
|
/* It's not in our list, use it as the new maximum */
|
|
max = iaxs[fr->callno]->history[x];
|
|
maxone = x;
|
|
}
|
|
|
|
}
|
|
if (!z) {
|
|
/* On our first pass, find the minimum too */
|
|
if (min > iaxs[fr->callno]->history[x])
|
|
min = iaxs[fr->callno]->history[x];
|
|
}
|
|
}
|
|
#if 1
|
|
drops[z] = maxone;
|
|
#endif
|
|
}
|
|
/* Just for reference, keep the "jitter" value, the difference between the
|
|
earliest and the latest. */
|
|
iaxs[fr->callno]->jitter = max - min;
|
|
|
|
/* If our jitter buffer is too big (by a significant margin), then we slowly
|
|
shrink it by about 1 ms each time to avoid letting the change be perceived */
|
|
if (max < iaxs[fr->callno]->jitterbuffer - max_jitter_buffer)
|
|
iaxs[fr->callno]->jitterbuffer -= 2;
|
|
|
|
#if 1
|
|
/* Constrain our maximum jitter buffer appropriately */
|
|
if (max > min + maxjitterbuffer) {
|
|
if (option_debug)
|
|
ast_log(LOG_DEBUG, "Constraining buffer from %d to %d + %d\n", max, min , maxjitterbuffer);
|
|
max = min + maxjitterbuffer;
|
|
}
|
|
#endif
|
|
|
|
/* If our jitter buffer is smaller than our maximum delay, grow the jitter
|
|
buffer immediately to accomodate it (and a little more). */
|
|
if (max > iaxs[fr->callno]->jitterbuffer)
|
|
iaxs[fr->callno]->jitterbuffer = max
|
|
/* + ((float)iaxs[fr->callno]->jitter) * 0.1 */;
|
|
|
|
|
|
if (option_debug)
|
|
ast_log(LOG_DEBUG, "min = %d, max = %d, jb = %d, lateness = %d\n", min, max, iaxs[fr->callno]->jitterbuffer, ms);
|
|
|
|
/* Subtract the lateness from our jitter buffer to know how long to wait
|
|
before sending our packet. */
|
|
ms = iaxs[fr->callno]->jitterbuffer - ms;
|
|
|
|
if (!use_jitterbuffer)
|
|
ms = 0;
|
|
|
|
if (ms < 1) {
|
|
if (option_debug)
|
|
ast_log(LOG_DEBUG, "Calculated ms is %d\n", ms);
|
|
/* Don't deliver it more than 4 ms late */
|
|
if ((ms > -4) || (fr->f->frametype != AST_FRAME_VOICE)) {
|
|
do_deliver(fr);
|
|
}
|
|
else {
|
|
/* Free the packet */
|
|
ast_frfree(fr->f);
|
|
/* And our iax frame */
|
|
free(fr);
|
|
}
|
|
} else {
|
|
if (option_debug)
|
|
ast_log(LOG_DEBUG, "Scheduling delivery in %d ms\n", ms);
|
|
ast_sched_add(sched, ms, do_deliver, fr);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int iax_transmit(struct ast_iax_frame *fr)
|
|
{
|
|
/* Lock the queue and place this packet at the end */
|
|
fr->next = NULL;
|
|
fr->prev = NULL;
|
|
/* By setting this to 0, the network thread will send it for us, and
|
|
queue retransmission if necessary */
|
|
fr->sentyet = 0;
|
|
pthread_mutex_lock(&iaxq.lock);
|
|
if (!iaxq.head) {
|
|
/* Empty queue */
|
|
iaxq.head = fr;
|
|
iaxq.tail = fr;
|
|
} else {
|
|
/* Double link */
|
|
iaxq.tail->next = fr;
|
|
fr->prev = iaxq.tail;
|
|
iaxq.tail = fr;
|
|
}
|
|
iaxq.count++;
|
|
pthread_mutex_unlock(&iaxq.lock);
|
|
/* Wake up the network thread */
|
|
pthread_kill(netthreadid, SIGURG);
|
|
return 0;
|
|
}
|
|
|
|
|
|
|
|
static int iax_digit(struct ast_channel *c, char digit)
|
|
{
|
|
return send_command(c->pvt->pvt, AST_FRAME_DTMF, digit, 0, NULL, 0, -1);
|
|
}
|
|
|
|
static int iax_sendtext(struct ast_channel *c, char *text)
|
|
{
|
|
|
|
return send_command(c->pvt->pvt, AST_FRAME_TEXT,
|
|
0, 0, text, strlen(text) + 1, -1);
|
|
}
|
|
|
|
static int create_addr(struct sockaddr_in *sin, char *peer)
|
|
{
|
|
struct hostent *hp;
|
|
struct iax_peer *p;
|
|
sin->sin_family = AF_INET;
|
|
pthread_mutex_lock(&peerl.lock);
|
|
p = peerl.peers;
|
|
while(p) {
|
|
if (!strcasecmp(p->name, peer)) {
|
|
sin->sin_addr = p->addr.sin_addr;
|
|
sin->sin_port = p->addr.sin_port;
|
|
break;
|
|
}
|
|
p = p->next;
|
|
}
|
|
pthread_mutex_unlock(&peerl.lock);
|
|
if (!p) {
|
|
hp = gethostbyname(peer);
|
|
if (hp) {
|
|
memcpy(&sin->sin_addr, hp->h_addr, sizeof(sin->sin_addr));
|
|
sin->sin_port = htons(AST_DEFAULT_IAX_PORTNO);
|
|
return 0;
|
|
} else
|
|
return -1;
|
|
} else
|
|
return 0;
|
|
}
|
|
static int iax_call(struct ast_channel *c, char *dest, int timeout)
|
|
{
|
|
struct sockaddr_in sin;
|
|
char host[256];
|
|
char *rdest;
|
|
char *rcontext;
|
|
char *username;
|
|
char *hname;
|
|
char requeststr[256] = "";
|
|
char myrdest [5] = "s";
|
|
char *portno = NULL;
|
|
if ((c->state != AST_STATE_DOWN) && (c->state != AST_STATE_RESERVED)) {
|
|
ast_log(LOG_WARNING, "Line is already in use (%s)?\n", c->name);
|
|
return -1;
|
|
}
|
|
strncpy(host, dest, sizeof(host));
|
|
strtok(host, "/");
|
|
/* If no destination extension specified, use 's' */
|
|
rdest = strtok(NULL, "/");
|
|
if (!rdest)
|
|
rdest = myrdest;
|
|
strtok(rdest, "@");
|
|
rcontext = strtok(NULL, "@");
|
|
strtok(host, "@");
|
|
username = strtok(NULL, "@");
|
|
if (username) {
|
|
/* Really the second argument is the host, not the username */
|
|
hname = username;
|
|
username = host;
|
|
} else {
|
|
hname = host;
|
|
}
|
|
if (strtok(hname, ":")) {
|
|
strtok(hname, ":");
|
|
portno = strtok(hname, ":");
|
|
}
|
|
if (create_addr(&sin, hname)) {
|
|
ast_log(LOG_WARNING, "No address associated with '%s'\n", hname);
|
|
return -1;
|
|
}
|
|
if (portno) {
|
|
sin.sin_port = htons(atoi(portno));
|
|
}
|
|
/* Now we build our request string */
|
|
#define MYSNPRINTF snprintf(requeststr + strlen(requeststr), sizeof(requeststr) - strlen(requeststr),
|
|
MYSNPRINTF "exten=%s;", rdest);
|
|
if (c->callerid)
|
|
MYSNPRINTF "callerid=%s;", c->callerid);
|
|
if (c->dnid)
|
|
MYSNPRINTF "dnid=%s;", c->dnid);
|
|
if (rcontext)
|
|
MYSNPRINTF "context=%s;", rcontext);
|
|
if (username)
|
|
MYSNPRINTF "username=%s;", username);
|
|
MYSNPRINTF "formats=%d;", c->nativeformats);
|
|
MYSNPRINTF "version=%d;", AST_IAX_PROTO_VERSION);
|
|
/* Trim the trailing ";" */
|
|
if (strlen(requeststr))
|
|
requeststr[strlen(requeststr) - 1] = '\0';
|
|
/* Transmit the string in a "NEW" request */
|
|
if (option_verbose > 2)
|
|
ast_verbose(VERBOSE_PREFIX_3 "Calling using options '%s'\n", requeststr);
|
|
send_command((struct chan_iax_pvt *)c->pvt->pvt, AST_FRAME_IAX,
|
|
AST_IAX_COMMAND_NEW, 0, requeststr, strlen(requeststr) + 1, -1);
|
|
c->state = AST_STATE_RINGING;
|
|
return 0;
|
|
}
|
|
|
|
static void iax_destroy(int callno)
|
|
{
|
|
char zero=0;
|
|
struct chan_iax_pvt *pvt = iaxs[callno];
|
|
if (pvt) {
|
|
if (pvt->owner) {
|
|
/* If there's an owner, prod it to give up */
|
|
write(pvt->pipe[1], &zero, 1);
|
|
return;
|
|
}
|
|
iaxs[callno] = NULL;
|
|
close(pvt->pipe[0]);
|
|
close(pvt->pipe[1]);
|
|
free(pvt);
|
|
}
|
|
}
|
|
|
|
static int iax_hangup(struct ast_channel *c) {
|
|
struct chan_iax_pvt *pvt = c->pvt->pvt;
|
|
/* Send the hangup unless we have had a transmission error */
|
|
if (!pvt->error) {
|
|
send_command(pvt, AST_FRAME_IAX, AST_IAX_COMMAND_HANGUP, 0, NULL, 0, -1);
|
|
/* Wait for the network thread to transmit our command -- of course, if
|
|
it doesn't, that's okay too -- the other end will find out
|
|
soon enough, but it's a nicity if it can know now. */
|
|
sleep(1);
|
|
}
|
|
pthread_mutex_lock(&iaxs_lock);
|
|
c->pvt->pvt = NULL;
|
|
pvt->owner = NULL;
|
|
pthread_mutex_lock(&usecnt_lock);
|
|
usecnt--;
|
|
if (usecnt < 0)
|
|
ast_log(LOG_WARNING, "Usecnt < 0???\n");
|
|
pthread_mutex_unlock(&usecnt_lock);
|
|
ast_update_use_count();
|
|
if (option_verbose > 2)
|
|
ast_verbose( VERBOSE_PREFIX_3 "Hungup '%s'\n", c->name);
|
|
iax_destroy(pvt->callno);
|
|
pthread_mutex_unlock(&iaxs_lock);
|
|
return 0;
|
|
}
|
|
|
|
static struct ast_frame *iax_read(struct ast_channel *c)
|
|
{
|
|
struct chan_iax_pvt *pvt = c->pvt->pvt;
|
|
struct ast_frame *f;
|
|
if (pvt->error) {
|
|
ast_log(LOG_DEBUG, "Connection closed, error: %s\n", strerror(pvt->error));
|
|
return NULL;
|
|
}
|
|
f = ast_fr_fdread(pvt->pipe[0]);
|
|
if (f) {
|
|
if ((f->frametype == AST_FRAME_CONTROL) &&
|
|
(f->subclass == AST_CONTROL_ANSWER))
|
|
c->state = AST_STATE_UP;
|
|
}
|
|
return f;
|
|
}
|
|
|
|
static int iax_answer(struct ast_channel *c)
|
|
{
|
|
struct chan_iax_pvt *pvt = c->pvt->pvt;
|
|
if (option_debug)
|
|
ast_log(LOG_DEBUG, "Answering\n");
|
|
return send_command(pvt, AST_FRAME_CONTROL, AST_CONTROL_ANSWER, 0, NULL, 0, -1);
|
|
}
|
|
|
|
static int iax_write(struct ast_channel *c, struct ast_frame *f);
|
|
|
|
static struct ast_channel *ast_iax_new(struct chan_iax_pvt *i, int state)
|
|
{
|
|
struct ast_channel *tmp;
|
|
tmp = ast_channel_alloc();
|
|
if (tmp) {
|
|
snprintf(tmp->name, sizeof(tmp->name), "IAX[%s:%d]/%d", inet_ntoa(i->addr.sin_addr), ntohs(i->addr.sin_port), i->callno);
|
|
tmp->type = type;
|
|
tmp->fd = i->pipe[0];
|
|
/* We can support any format by default, until we get restricted */
|
|
tmp->nativeformats = iax_capability;
|
|
tmp->pvt->pvt = i;
|
|
tmp->pvt->send_digit = iax_digit;
|
|
tmp->pvt->send_text = iax_sendtext;
|
|
tmp->pvt->call = iax_call;
|
|
tmp->pvt->hangup = iax_hangup;
|
|
tmp->pvt->answer = iax_answer;
|
|
tmp->pvt->read = iax_read;
|
|
tmp->pvt->write = iax_write;
|
|
if (strlen(i->callerid))
|
|
tmp->callerid = strdup(i->callerid);
|
|
if (strlen(i->dnid))
|
|
tmp->dnid = strdup(i->dnid);
|
|
strncpy(tmp->context, i->context, sizeof(tmp->context));
|
|
strncpy(tmp->exten, i->exten, sizeof(tmp->exten));
|
|
i->owner = tmp;
|
|
tmp->state = state;
|
|
pthread_mutex_lock(&usecnt_lock);
|
|
usecnt++;
|
|
pthread_mutex_unlock(&usecnt_lock);
|
|
ast_update_use_count();
|
|
if (state != AST_STATE_DOWN) {
|
|
if (ast_pbx_start(tmp)) {
|
|
ast_log(LOG_WARNING, "Unable to start PBX on %s\n", tmp->name);
|
|
ast_hangup(tmp);
|
|
tmp = NULL;
|
|
}
|
|
}
|
|
}
|
|
return tmp;
|
|
}
|
|
|
|
static unsigned int calc_timestamp(struct chan_iax_pvt *p, unsigned int ts)
|
|
{
|
|
struct timeval tv;
|
|
unsigned int ms;
|
|
if (!p->offset.tv_sec && !p->offset.tv_usec)
|
|
gettimeofday(&p->offset, NULL);
|
|
/* If the timestamp is specified, just send it as is */
|
|
if (ts)
|
|
return ts;
|
|
gettimeofday(&tv, NULL);
|
|
ms = (tv.tv_sec - p->offset.tv_sec) * 1000 + (tv.tv_usec - p->offset.tv_usec) / 1000;
|
|
/* We never send the same timestamp twice, so fudge a little if we must */
|
|
if (ms <= p->lastsent)
|
|
ms = p->lastsent + 1;
|
|
p->lastsent = ms;
|
|
return ms;
|
|
}
|
|
|
|
static unsigned int calc_rxstamp(struct chan_iax_pvt *p)
|
|
{
|
|
/* Returns where in "receive time" we are */
|
|
struct timeval tv;
|
|
unsigned int ms;
|
|
if (!p->rxcore.tv_sec && !p->rxcore.tv_usec)
|
|
gettimeofday(&p->rxcore, NULL);
|
|
gettimeofday(&tv, NULL);
|
|
ms = (tv.tv_sec - p->offset.tv_sec) * 1000 + (tv.tv_usec - p->offset.tv_usec) / 1000;
|
|
return ms;
|
|
}
|
|
static int iax_send(struct chan_iax_pvt *pvt, struct ast_frame *f, unsigned int ts, int seqno)
|
|
{
|
|
/* Queue a packet for delivery on a given private structure. Use "ts" for
|
|
timestamp, or calculate if ts is 0 */
|
|
struct ast_iax_full_hdr *fh;
|
|
struct ast_iax_mini_hdr *mh;
|
|
struct ast_iax_frame *fr;
|
|
int res;
|
|
unsigned int lastsent;
|
|
/* Allocate an ast_iax_frame */
|
|
fr = malloc(sizeof(struct ast_iax_frame));
|
|
if (!fr) {
|
|
ast_log(LOG_WARNING, "Out of memory\n");
|
|
return -1;
|
|
}
|
|
if (!pvt) {
|
|
ast_log(LOG_WARNING, "No private structure for packet (%d)?\n", fr->callno);
|
|
free(fr);
|
|
return -1;
|
|
}
|
|
/* Isolate our frame for transmission */
|
|
fr->f = ast_frdup(f);
|
|
if (!fr->f) {
|
|
ast_log(LOG_WARNING, "Out of memory\n");
|
|
free(fr);
|
|
return -1;
|
|
}
|
|
if (fr->f->offset < sizeof(struct ast_iax_full_hdr)) {
|
|
ast_log(LOG_WARNING, "Packet from '%s' not friendly\n", fr->f->src);
|
|
free(fr);
|
|
return -1;
|
|
}
|
|
lastsent = pvt->lastsent;
|
|
fr->ts = calc_timestamp(pvt, ts);
|
|
if (!fr->ts) {
|
|
ast_log(LOG_WARNING, "timestamp is 0?\n");
|
|
return -1;
|
|
}
|
|
fr->callno = pvt->callno;
|
|
if (((fr->ts & 0xFFFF0000L) != (lastsent & 0xFFFF0000L))
|
|
/* High two bits of timestamp differ */ ||
|
|
(fr->f->frametype != AST_FRAME_VOICE)
|
|
/* or not a voice frame */ ||
|
|
(fr->f->subclass != pvt->svoiceformat)
|
|
/* or new voice format */ ) {
|
|
/* We need a full frame */
|
|
if (seqno > -1)
|
|
fr->seqno = seqno;
|
|
else
|
|
fr->seqno = pvt->oseqno++;
|
|
fh = (struct ast_iax_full_hdr *)(fr->f->data - sizeof(struct ast_iax_full_hdr));
|
|
fh->callno = htons(fr->callno | AST_FLAG_FULL);
|
|
fh->ts = htonl(fr->ts);
|
|
fh->seqno = htons(fr->seqno);
|
|
fh->type = fr->f->frametype & 0xFF;
|
|
fh->csub = compress_subclass(fr->f->subclass);
|
|
#if 0
|
|
fh->subclasshigh = (fr->f->subclass & 0xFF0000) >> 16;
|
|
fh->subclasslow = htons(fr->f->subclass & 0xFFFF);
|
|
#endif
|
|
fh->dcallno = htons(pvt->peercallno);
|
|
fr->datalen = fr->f->datalen + sizeof(struct ast_iax_full_hdr);
|
|
fr->data = fh;
|
|
fr->retries = 0;
|
|
/* Retry after 2x the ping time has passed */
|
|
fr->retrytime = pvt->pingtime * 2;
|
|
if (fr->retrytime < MIN_RETRY_TIME)
|
|
fr->retrytime = MIN_RETRY_TIME;
|
|
if (fr->retrytime > MAX_RETRY_TIME)
|
|
fr->retrytime = MAX_RETRY_TIME;
|
|
/* Acks' don't get retried */
|
|
if ((f->frametype == AST_FRAME_IAX) && (f->subclass == AST_IAX_COMMAND_ACK))
|
|
fr->retries = -1;
|
|
if (f->frametype == AST_FRAME_VOICE) {
|
|
pvt->svoiceformat = f->subclass;
|
|
}
|
|
res = iax_transmit(fr);
|
|
} else {
|
|
/* Mini-frames have no sequence number */
|
|
fr->seqno = -1;
|
|
/* Mini frame will do */
|
|
mh = (struct ast_iax_mini_hdr *)(fr->f->data - sizeof(struct ast_iax_mini_hdr));
|
|
mh->callno = htons(fr->callno);
|
|
mh->ts = htons(fr->ts & 0xFFFF);
|
|
fr->datalen = fr->f->datalen + sizeof(struct ast_iax_mini_hdr);
|
|
fr->data = mh;
|
|
fr->retries = -1;
|
|
res = iax_transmit(fr);
|
|
}
|
|
return res;
|
|
}
|
|
|
|
|
|
|
|
static int iax_show_users(int fd, int argc, char *argv[])
|
|
{
|
|
#define FORMAT "%-15.15s %-15.15s %-15.15s %-15.15s %-5.5s\n"
|
|
struct iax_user *user;
|
|
if (argc != 3)
|
|
return RESULT_SHOWUSAGE;
|
|
pthread_mutex_lock(&userl.lock);
|
|
ast_cli(fd, FORMAT, "Username", "Secret", "Authen", "Def.Context", "A/C");
|
|
for(user=userl.users;user;user=user->next) {
|
|
ast_cli(fd, FORMAT, user->name, user->secret, user->methods,
|
|
user->contexts ? user->contexts->context : context,
|
|
user->ha ? "Yes" : "No");
|
|
}
|
|
pthread_mutex_unlock(&userl.lock);
|
|
return RESULT_SUCCESS;
|
|
#undef FORMAT
|
|
}
|
|
|
|
static int iax_show_peers(int fd, int argc, char *argv[])
|
|
{
|
|
#define FORMAT2 "%-15.15s %-15.15s %-15.15s %-15.15s %s\n"
|
|
#define FORMAT "%-15.15s %-15.15s %-15.15s %-15.15s %d\n"
|
|
struct iax_peer *peer;
|
|
if (argc != 3)
|
|
return RESULT_SHOWUSAGE;
|
|
pthread_mutex_lock(&peerl.lock);
|
|
ast_cli(fd, FORMAT2, "Name", "Username", "Host", "Mask", "Port");
|
|
for (peer = peerl.peers;peer;peer = peer->next) {
|
|
char nm[20];
|
|
strncpy(nm, inet_ntoa(peer->mask), sizeof(nm));
|
|
ast_cli(fd, FORMAT, peer->name,
|
|
peer->username ? peer->username : "(Any)",
|
|
peer->addr.sin_addr.s_addr ? inet_ntoa(peer->addr.sin_addr) : "(Any)",
|
|
nm,
|
|
ntohs(peer->addr.sin_port));
|
|
}
|
|
pthread_mutex_unlock(&peerl.lock);
|
|
return RESULT_SUCCESS;
|
|
#undef FORMAT
|
|
#undef FORMAT2
|
|
}
|
|
|
|
static int iax_show_channels(int fd, int argc, char *argv[])
|
|
{
|
|
#define FORMAT2 "%-15.15s %-10.10s %-11.11s %-11.11s %-7.7s %-6.6s %s\n"
|
|
#define FORMAT "%-15.15s %-10.10s %5.5d/%5.5d %5.5d/%5.5d %-5.5dms %-4.4dms %d\n"
|
|
int x;
|
|
if (argc != 3)
|
|
return RESULT_SHOWUSAGE;
|
|
pthread_mutex_lock(&iaxs_lock);
|
|
ast_cli(fd, FORMAT2, "Peer", "Username", "ID (Lo/Rem)", "Seq (Tx/Rx)", "Lag", "Jitter", "Format");
|
|
for (x=0;x<AST_IAX_MAX_CALLS;x++)
|
|
if (iaxs[x])
|
|
ast_cli(fd, FORMAT, inet_ntoa(iaxs[x]->addr.sin_addr),
|
|
strlen(iaxs[x]->username) ? iaxs[x]->username : "(None)",
|
|
iaxs[x]->callno, iaxs[x]->peercallno,
|
|
iaxs[x]->oseqno, iaxs[x]->iseqno,
|
|
iaxs[x]->lag,
|
|
iaxs[x]->jitter,
|
|
iaxs[x]->voiceformat);
|
|
pthread_mutex_unlock(&iaxs_lock);
|
|
return RESULT_SUCCESS;
|
|
#undef FORMAT
|
|
#undef FORMAT2
|
|
}
|
|
|
|
static char show_users_usage[] =
|
|
"Usage: iax show users\n"
|
|
" Lists all users known to the IAX (Inter-Asterisk eXchange) subsystem.\n";
|
|
|
|
static char show_channels_usage[] =
|
|
"Usage: iax show channels\n"
|
|
" Lists all currently active IAX channels.\n";
|
|
|
|
static char show_peers_usage[] =
|
|
"Usage: iax show peers\n"
|
|
" Lists all known IAX peers.\n";
|
|
|
|
static struct ast_cli_entry cli_show_users =
|
|
{ { "iax", "show", "users", NULL }, iax_show_users, "Show defined IAX users", show_users_usage };
|
|
static struct ast_cli_entry cli_show_channels =
|
|
{ { "iax", "show", "channels", NULL }, iax_show_channels, "Show active IAX channels", show_channels_usage };
|
|
static struct ast_cli_entry cli_show_peers =
|
|
{ { "iax", "show", "peers", NULL }, iax_show_peers, "Show defined IAX peers", show_peers_usage };
|
|
|
|
static int iax_write(struct ast_channel *c, struct ast_frame *f)
|
|
{
|
|
struct chan_iax_pvt *i = c->pvt->pvt;
|
|
/* If there's an outstanding error, return failure now */
|
|
if (i->error) {
|
|
ast_log(LOG_DEBUG, "Write error: %s\n", strerror(errno));
|
|
return -1;
|
|
}
|
|
/* Don't waste bandwidth sending null frames */
|
|
if (f->frametype == AST_FRAME_NULL)
|
|
return 0;
|
|
/* Simple, just queue for transmission */
|
|
return iax_send(i, f, 0, -1);
|
|
}
|
|
|
|
static int send_command(struct chan_iax_pvt *i, char type, int command, unsigned int ts, char *data, int datalen, int seqno)
|
|
{
|
|
struct ast_frame f;
|
|
f.frametype = type;
|
|
f.subclass = command;
|
|
f.datalen = datalen;
|
|
f.timelen = 0;
|
|
f.mallocd = 0;
|
|
f.offset = 0;
|
|
f.src = __FUNCTION__;
|
|
f.data = data;
|
|
return iax_send(i, &f, ts, seqno);
|
|
}
|
|
|
|
static int apply_context(struct iax_context *con, char *context)
|
|
{
|
|
while(con) {
|
|
if (!strcmp(con->context, context))
|
|
return -1;
|
|
con = con->next;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int apply_ha(struct iax_ha *ha, struct sockaddr_in *sin)
|
|
{
|
|
/* Start optimistic */
|
|
int res = IAX_SENSE_ALLOW;
|
|
while(ha) {
|
|
/* For each rule, if this address and the netmask = the net address
|
|
apply the current rule */
|
|
if ((sin->sin_addr.s_addr & ha->netmask.s_addr) == (ha->netaddr.s_addr))
|
|
res = ha->sense;
|
|
ha = ha->next;
|
|
}
|
|
return res;
|
|
}
|
|
|
|
static int iax_getformats(int callno, char *orequest)
|
|
{
|
|
char *var, *value;
|
|
char request[256];
|
|
strncpy(request, orequest, sizeof(request));
|
|
var = strtok(request, ";");
|
|
while(var) {
|
|
value = strchr(var, '=');
|
|
if (value) {
|
|
*value='\0';
|
|
value++;
|
|
if (!strcmp(var, "formats")) {
|
|
iaxs[callno]->peerformats = atoi(value);
|
|
} else
|
|
ast_log(LOG_WARNING, "Unknown variable '%s' with value '%s'\n", var, value);
|
|
}
|
|
var = strtok(NULL, ";");
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int check_access(int callno, struct sockaddr_in *sin, char *orequest, int requestl)
|
|
{
|
|
/* Start pessimistic */
|
|
int res = -1;
|
|
int version = 1;
|
|
char *var, *value;
|
|
struct iax_user *user;
|
|
char request[256];
|
|
strncpy(request, orequest, sizeof(request));
|
|
if (!iaxs[callno])
|
|
return res;
|
|
var = strtok(request, ";");
|
|
while(var) {
|
|
value = strchr(var, '=');
|
|
if (value) {
|
|
*value='\0';
|
|
value++;
|
|
if (!strcmp(var, "exten"))
|
|
strncpy(iaxs[callno]->exten, value, sizeof(iaxs[callno]->exten));
|
|
else if (!strcmp(var, "callerid"))
|
|
strncpy(iaxs[callno]->callerid, value, sizeof(iaxs[callno]->callerid));
|
|
else if (!strcmp(var, "dnid"))
|
|
strncpy(iaxs[callno]->dnid, value, sizeof(iaxs[callno]->dnid));
|
|
else if (!strcmp(var, "context"))
|
|
strncpy(iaxs[callno]->context, value, sizeof(iaxs[callno]->context));
|
|
else if (!strcmp(var, "username"))
|
|
strncpy(iaxs[callno]->username, value, sizeof(iaxs[callno]->username));
|
|
else if (!strcmp(var, "formats"))
|
|
iaxs[callno]->peerformats = atoi(value);
|
|
else if (!strcmp(var, "version"))
|
|
version = atoi(value);
|
|
else
|
|
ast_log(LOG_WARNING, "Unknown variable '%s' with value '%s'\n", var, value);
|
|
}
|
|
var = strtok(NULL, ";");
|
|
}
|
|
if (version > AST_IAX_PROTO_VERSION) {
|
|
ast_log(LOG_WARNING, "Peer '%s' has too new a protocol version (%d) for me\n",
|
|
inet_ntoa(sin->sin_addr), version);
|
|
return res;
|
|
}
|
|
pthread_mutex_lock(&userl.lock);
|
|
/* Search the userlist for a compatible entry, and fill in the rest */
|
|
user = userl.users;
|
|
while(user) {
|
|
if ((!strlen(iaxs[callno]->username) || /* No username specified */
|
|
!strcmp(iaxs[callno]->username, user->name)) /* Or this username specified */
|
|
&& (apply_ha(user->ha, sin) == IAX_SENSE_ALLOW) /* Access is permitted from this IP */
|
|
&& (!strlen(iaxs[callno]->context) || /* No context specified */
|
|
apply_context(user->contexts, iaxs[callno]->context))) { /* Context is permitted */
|
|
/* We found our match (use the first) */
|
|
|
|
/* Store the requested username if not specified */
|
|
if (!strlen(iaxs[callno]->username))
|
|
strncpy(iaxs[callno]->username, user->name, sizeof(iaxs[callno]->username));
|
|
/* And use the default context */
|
|
if (!strlen(iaxs[callno]->context)) {
|
|
if (user->contexts)
|
|
strncpy(iaxs[callno]->context, user->contexts->context, sizeof(iaxs[callno]->context));
|
|
else
|
|
strncpy(iaxs[callno]->context, context, sizeof(iaxs[callno]->context));
|
|
}
|
|
/* Copy the secret */
|
|
strncpy(iaxs[callno]->secret, user->secret, sizeof(iaxs[callno]->secret));
|
|
/* And the permitted authentication methods */
|
|
strncpy(iaxs[callno]->methods, user->methods, sizeof(iaxs[callno]->methods));
|
|
res = 0;
|
|
break;
|
|
}
|
|
user = user->next;
|
|
}
|
|
pthread_mutex_unlock(&userl.lock);
|
|
return res;
|
|
}
|
|
|
|
static int raw_hangup(struct sockaddr_in *sin, short src, short dst)
|
|
{
|
|
struct ast_iax_full_hdr fh;
|
|
fh.callno = htons(src | AST_FLAG_FULL);
|
|
fh.dcallno = htons(dst);
|
|
fh.ts = 0;
|
|
fh.seqno = 0;
|
|
fh.type = AST_FRAME_IAX;
|
|
fh.csub = compress_subclass(AST_IAX_COMMAND_INVAL);
|
|
if (option_debug)
|
|
ast_log(LOG_DEBUG, "Raw Hangup\n");
|
|
return sendto(netsocket, &fh, sizeof(fh), 0, sin, sizeof(*sin));
|
|
}
|
|
|
|
static int authenticate_request(struct chan_iax_pvt *p)
|
|
{
|
|
char requeststr[256] = "";
|
|
MYSNPRINTF "methods=%s;", p->methods);
|
|
if (strstr(p->methods, "md5")) {
|
|
/* Build the challenge */
|
|
srand(time(NULL));
|
|
snprintf(p->challenge, sizeof(p->challenge), "%d", rand());
|
|
MYSNPRINTF "challenge=%s;", p->challenge);
|
|
}
|
|
MYSNPRINTF "username=%s;", p->username);
|
|
if (strlen(requeststr))
|
|
requeststr[strlen(requeststr) - 1] = '\0';
|
|
return send_command(p, AST_FRAME_IAX, AST_IAX_COMMAND_AUTHREQ, 0, requeststr, strlen(requeststr) + 1, -1);
|
|
}
|
|
|
|
static int authenticate_verify(struct chan_iax_pvt *p, char *orequest)
|
|
{
|
|
char requeststr[256] = "";
|
|
char *var, *value, request[256];
|
|
char md5secret[256] = "";
|
|
char secret[256] = "";
|
|
int res = -1;
|
|
int x;
|
|
|
|
if (!(p->state & IAX_STATE_AUTHENTICATED))
|
|
return res;
|
|
strncpy(request, orequest, sizeof(request));
|
|
var = strtok(request, ";");
|
|
while(var) {
|
|
value = strchr(var, '=');
|
|
if (value) {
|
|
*value='\0';
|
|
value++;
|
|
if (!strcmp(var, "secret"))
|
|
strncpy(secret, value, sizeof(secret));
|
|
else if (!strcmp(var, "md5secret"))
|
|
strncpy(md5secret, value, sizeof(md5secret));
|
|
else
|
|
ast_log(LOG_WARNING, "Unknown variable '%s' with value '%s'\n", var, value);
|
|
}
|
|
var = strtok(NULL, ";");
|
|
}
|
|
if (strstr(p->methods, "md5")) {
|
|
struct MD5Context md5;
|
|
unsigned char digest[16];
|
|
MD5Init(&md5);
|
|
MD5Update(&md5, p->challenge, strlen(p->challenge));
|
|
MD5Update(&md5, p->secret, strlen(p->secret));
|
|
MD5Final(digest, &md5);
|
|
/* If they support md5, authenticate with it. */
|
|
for (x=0;x<16;x++)
|
|
MYSNPRINTF "%2.2x", digest[x]);
|
|
if (!strcasecmp(requeststr, md5secret))
|
|
res = 0;
|
|
} else if (strstr(p->methods, "plaintext")) {
|
|
if (!strcmp(secret, p->secret))
|
|
res = 0;
|
|
}
|
|
return res;
|
|
}
|
|
|
|
static int authenticate_reply(struct chan_iax_pvt *p, struct sockaddr_in *sin, char *orequest)
|
|
{
|
|
struct iax_peer *peer;
|
|
/* Start pessimistic */
|
|
int res = -1;
|
|
char request[256];
|
|
char methods[80] = "";
|
|
char requeststr[256] = "";
|
|
char *var, *value;
|
|
int x;
|
|
strncpy(request, orequest, sizeof(request));
|
|
var = strtok(request, ";");
|
|
while(var) {
|
|
value = strchr(var, '=');
|
|
if (value) {
|
|
*value='\0';
|
|
value++;
|
|
if (!strcmp(var, "username"))
|
|
strncpy(p->username, value, sizeof(p->username));
|
|
else if (!strcmp(var, "challenge"))
|
|
strncpy(p->challenge, value, sizeof(p->challenge));
|
|
else if (!strcmp(var, "methods"))
|
|
strncpy(methods, value, sizeof(methods));
|
|
else
|
|
ast_log(LOG_WARNING, "Unknown variable '%s' with value '%s'\n", var, value);
|
|
}
|
|
var = strtok(NULL, ";");
|
|
}
|
|
pthread_mutex_lock(&peerl.lock);
|
|
peer = peerl.peers;
|
|
while(peer) {
|
|
if ((!strlen(p->peer) || !strcmp(p->peer, peer->name))
|
|
/* No peer specified at our end, or this is the peer */
|
|
&& (!strlen(peer->username) || (!strcmp(peer->username, p->username)))
|
|
/* No username specified in peer rule, or this is the right username */
|
|
&& (!peer->addr.sin_addr.s_addr || ((sin->sin_addr.s_addr & peer->mask.s_addr) == (peer->addr.sin_addr.s_addr & peer->mask.s_addr)))
|
|
/* No specified host, or this is our host */
|
|
) {
|
|
/* We have a match, authenticate it. */
|
|
res = 0;
|
|
if (strstr(methods, "md5")) {
|
|
struct MD5Context md5;
|
|
unsigned char digest[16];
|
|
MD5Init(&md5);
|
|
MD5Update(&md5, p->challenge, strlen(p->challenge));
|
|
MD5Update(&md5, peer->secret, strlen(peer->secret));
|
|
MD5Final(digest, &md5);
|
|
/* If they support md5, authenticate with it. */
|
|
MYSNPRINTF "md5secret=");
|
|
for (x=0;x<16;x++)
|
|
MYSNPRINTF "%2.2x", digest[x]);
|
|
MYSNPRINTF ";");
|
|
} else if (strstr(methods, "plaintext")) {
|
|
MYSNPRINTF "secret=%s;", peer->secret);
|
|
} else
|
|
res = -1;
|
|
if (strlen(requeststr))
|
|
requeststr[strlen(requeststr)-1] = '\0';
|
|
if (!res)
|
|
res = send_command(p, AST_FRAME_IAX, AST_IAX_COMMAND_AUTHREP, 0, requeststr, strlen(requeststr) + 1, -1);
|
|
break;
|
|
}
|
|
peer = peer->next;
|
|
}
|
|
pthread_mutex_unlock(&peerl.lock);
|
|
return res;
|
|
}
|
|
|
|
static int socket_read(int *id, int fd, short events, void *cbdata)
|
|
{
|
|
struct sockaddr_in sin;
|
|
int res;
|
|
int new = NEW_PREVENT;
|
|
char buf[4096];
|
|
char src[80];
|
|
int len = sizeof(sin);
|
|
int dcallno = -1;
|
|
struct ast_iax_full_hdr *fh = (struct ast_iax_full_hdr *)buf;
|
|
struct ast_iax_mini_hdr *mh = (struct ast_iax_mini_hdr *)buf;
|
|
struct ast_iax_frame fr, *cur;
|
|
struct ast_frame f;
|
|
struct ast_channel *c;
|
|
res = recvfrom(netsocket, buf, sizeof(buf), 0, &sin, &len);
|
|
if (res < 0) {
|
|
ast_log(LOG_WARNING, "Error: %s\n", strerror(errno));
|
|
handle_error();
|
|
return 1;
|
|
}
|
|
if (res < sizeof(struct ast_iax_mini_hdr)) {
|
|
ast_log(LOG_WARNING, "midget packet received (%d of %d min)\n", res, sizeof(struct ast_iax_mini_hdr));
|
|
return 1;
|
|
}
|
|
if (ntohs(mh->callno) & AST_FLAG_FULL) {
|
|
/* Get the destination call number */
|
|
dcallno = ntohs(fh->dcallno);
|
|
/* Retrieve the type and subclass */
|
|
f.frametype = fh->type;
|
|
f.subclass = uncompress_subclass(fh->csub);
|
|
#if 0
|
|
f.subclass = fh->subclasshigh << 16;
|
|
f.subclass += ntohs(fh->subclasslow);
|
|
#endif
|
|
if ((f.frametype == AST_FRAME_IAX) && (f.subclass == AST_IAX_COMMAND_NEW))
|
|
new = NEW_ALLOW;
|
|
}
|
|
pthread_mutex_lock(&iaxs_lock);
|
|
fr.callno = find_callno(ntohs(mh->callno) & ~AST_FLAG_FULL, dcallno, &sin, new);
|
|
if ((fr.callno < 0) || !iaxs[fr.callno]) {
|
|
/* A call arrived for a non-existant destination. Unless it's an "inval"
|
|
frame, reply with an inval */
|
|
if (ntohs(mh->callno) & AST_FLAG_FULL) {
|
|
/* We can only raw hangup control frames */
|
|
if ((f.subclass != AST_IAX_COMMAND_INVAL) || (f.frametype != AST_FRAME_IAX))
|
|
raw_hangup(&sin, ntohs(fh->dcallno), ntohs(mh->callno));
|
|
}
|
|
pthread_mutex_unlock(&iaxs_lock);
|
|
return 1;
|
|
}
|
|
iaxs[fr.callno]->peercallno = ntohs(mh->callno) & ~AST_FLAG_FULL;
|
|
if (ntohs(mh->callno) & AST_FLAG_FULL) {
|
|
if (option_debug)
|
|
ast_log(LOG_DEBUG, "Received packet %d, (%d, %d)\n", ntohs(fh->seqno), f.frametype, f.subclass);
|
|
/* Check if it's out of order (and not an ACK or INVAL) */
|
|
fr.seqno = ntohs(fh->seqno);
|
|
if (iaxs[fr.callno]->iseqno != fr.seqno) {
|
|
if (
|
|
((f.subclass != AST_IAX_COMMAND_ACK) && (f.subclass != AST_IAX_COMMAND_INVAL)) ||
|
|
(f.frametype != AST_FRAME_IAX)) {
|
|
/* If it's not an ACK packet, it's out of order. */
|
|
if (option_debug)
|
|
ast_log(LOG_DEBUG, "Packet arrived out of order (expecting %d, got %d) (frametype = %d, subclass = %d)\n",
|
|
iaxs[fr.callno]->iseqno, fr.seqno, f.frametype, f.subclass);
|
|
if (iaxs[fr.callno]->iseqno > fr.seqno) {
|
|
/* If we've already seen it, ack it XXX There's a border condition here XXX */
|
|
if ((f.frametype != AST_FRAME_IAX) ||
|
|
((f.subclass != AST_IAX_COMMAND_ACK) && (f.subclass != AST_IAX_COMMAND_INVAL))) {
|
|
if (option_debug)
|
|
ast_log(LOG_DEBUG, "Acking anyway\n");
|
|
send_command(iaxs[fr.callno], AST_FRAME_IAX, AST_IAX_COMMAND_ACK, fr.ts, NULL, 0,fr.seqno);
|
|
}
|
|
}
|
|
pthread_mutex_unlock(&iaxs_lock);
|
|
return 1;
|
|
}
|
|
} else {
|
|
/* Increment unless it's an ACK */
|
|
if ((f.subclass != AST_IAX_COMMAND_ACK) ||
|
|
(f.frametype != AST_FRAME_IAX))
|
|
iaxs[fr.callno]->iseqno++;
|
|
}
|
|
/* A full frame */
|
|
if (res < sizeof(struct ast_iax_full_hdr)) {
|
|
ast_log(LOG_WARNING, "midget packet received (%d of %d min)\n", res, sizeof(struct ast_iax_full_hdr));
|
|
pthread_mutex_unlock(&iaxs_lock);
|
|
return 1;
|
|
}
|
|
f.datalen = res - sizeof(struct ast_iax_full_hdr);
|
|
if (f.datalen)
|
|
f.data = buf + sizeof(struct ast_iax_full_hdr);
|
|
else
|
|
f.data = NULL;
|
|
fr.ts = ntohl(fh->ts);
|
|
/* Unless this is an ACK or INVAL frame, ack it */
|
|
if ((f.frametype != AST_FRAME_IAX) ||
|
|
((f.subclass != AST_IAX_COMMAND_ACK) && (f.subclass != AST_IAX_COMMAND_INVAL)))
|
|
send_command(iaxs[fr.callno], AST_FRAME_IAX, AST_IAX_COMMAND_ACK, fr.ts, NULL, 0,fr.seqno);
|
|
if (f.frametype == AST_FRAME_VOICE)
|
|
iaxs[fr.callno]->voiceformat = f.subclass;
|
|
if (f.frametype == AST_FRAME_IAX) {
|
|
/* Handle the IAX pseudo frame itself */
|
|
if (option_debug)
|
|
ast_log(LOG_DEBUG, "IAX subclass %d received\n", f.subclass);
|
|
switch(f.subclass) {
|
|
case AST_IAX_COMMAND_ACK:
|
|
/* Ack the packet with the given timestamp */
|
|
pthread_mutex_lock(&iaxq.lock);
|
|
for (cur = iaxq.head; cur ; cur = cur->next) {
|
|
/* If it's our call, and our timestamp, mark -1 retries */
|
|
if ((fr.callno == cur->callno) && (fr.seqno == cur->seqno))
|
|
cur->retries = -1;
|
|
}
|
|
pthread_mutex_unlock(&iaxq.lock);
|
|
break;
|
|
case AST_IAX_COMMAND_NEW:
|
|
((char *)f.data)[f.datalen] = '\0';
|
|
if (check_access(fr.callno, &sin, f.data, f.datalen)) {
|
|
/* They're not allowed on */
|
|
send_command(iaxs[fr.callno], AST_FRAME_IAX, AST_IAX_COMMAND_REJECT, 0, "No authority found", strlen("No authority found"), -1);
|
|
ast_log(LOG_NOTICE, "Rejected connect attempt from %s, request '%s'\n", inet_ntoa(sin.sin_addr), f.data);
|
|
/* XXX Not guaranteed to work, but probably does XXX */
|
|
pthread_mutex_lock(&iaxq.lock);
|
|
send_packet(iaxq.tail);
|
|
pthread_mutex_unlock(&iaxq.lock);
|
|
iax_destroy(fr.callno);
|
|
break;
|
|
}
|
|
if (!strlen(iaxs[fr.callno]->secret)) {
|
|
/* No authentication required, let them in */
|
|
send_command(iaxs[fr.callno], AST_FRAME_IAX, AST_IAX_COMMAND_ACCEPT, 0, NULL, 0, -1);
|
|
if (option_verbose > 2)
|
|
ast_verbose(VERBOSE_PREFIX_3 "Accepting unauthenticated call from %s, formats = %d\n", inet_ntoa(sin.sin_addr), iaxs[fr.callno]->peerformats);
|
|
iaxs[fr.callno]->state |= IAX_STATE_STARTED;
|
|
if(!(c = ast_iax_new(iaxs[fr.callno], AST_STATE_RING)))
|
|
iax_destroy(fr.callno);
|
|
else
|
|
c->nativeformats = iaxs[fr.callno]->peerformats;
|
|
break;
|
|
}
|
|
authenticate_request(iaxs[fr.callno]);
|
|
iaxs[fr.callno]->state |= IAX_STATE_AUTHENTICATED;
|
|
break;
|
|
case AST_IAX_COMMAND_HANGUP:
|
|
#if 0
|
|
iaxs[fr.callno]->error = ENOTCONN;
|
|
#endif
|
|
iax_destroy(fr.callno);
|
|
break;
|
|
case AST_IAX_COMMAND_REJECT:
|
|
if (f.data)
|
|
((char *)f.data)[f.datalen] = '\0';
|
|
ast_log(LOG_WARNING, "Call rejected by %s: %s\n", inet_ntoa(iaxs[fr.callno]->addr.sin_addr), f.data);
|
|
iaxs[fr.callno]->error = EPERM;
|
|
iax_destroy(fr.callno);
|
|
break;
|
|
case AST_IAX_COMMAND_ACCEPT:
|
|
if (f.data) {
|
|
((char *)f.data)[f.datalen]='\0';
|
|
iax_getformats(fr.callno, (char *)f.data);
|
|
} else {
|
|
iaxs[fr.callno]->peerformats = iax_capability;
|
|
}
|
|
if (option_verbose > 2)
|
|
ast_verbose(VERBOSE_PREFIX_3 "Call accepted by %s\n", inet_ntoa(iaxs[fr.callno]->addr.sin_addr));
|
|
iaxs[fr.callno]->state |= IAX_STATE_STARTED;
|
|
if (iaxs[fr.callno]->owner) {
|
|
/* Switch us to use a compatible format */
|
|
iaxs[fr.callno]->owner->nativeformats &= iaxs[fr.callno]->peerformats;
|
|
|
|
if (!iaxs[fr.callno]->owner->nativeformats)
|
|
iaxs[fr.callno]->owner->nativeformats = iaxs[fr.callno]->peerformats & iax_capability;
|
|
if (!iaxs[fr.callno]->owner->nativeformats) {
|
|
ast_log(LOG_WARNING, "Unable to negotiate a common format with the peer.");
|
|
iaxs[fr.callno]->error = EBADE;
|
|
iax_destroy(fr.callno);
|
|
} else {
|
|
if (option_verbose > 2)
|
|
ast_verbose(VERBOSE_PREFIX_3 "Format for call is %d\n", iaxs[fr.callno]->owner->nativeformats);
|
|
}
|
|
|
|
}
|
|
break;
|
|
case AST_IAX_COMMAND_PING:
|
|
/* Send back a pong packet with the original timestamp */
|
|
send_command(iaxs[fr.callno], AST_FRAME_IAX, AST_IAX_COMMAND_PONG, fr.ts, NULL, 0, -1);
|
|
break;
|
|
case AST_IAX_COMMAND_PONG:
|
|
iaxs[fr.callno]->pingtime = calc_timestamp(iaxs[fr.callno], 0) - fr.ts;
|
|
break;
|
|
case AST_IAX_COMMAND_LAGRQ:
|
|
case AST_IAX_COMMAND_LAGRP:
|
|
/* A little strange -- We have to actually go through the motions of
|
|
delivering the packet. In the very last step, it will be properly
|
|
handled by do_deliver */
|
|
snprintf(src, sizeof(src), "LAGRQ-IAX/%s/%d", inet_ntoa(sin.sin_addr),fr.callno);
|
|
f.src = src;
|
|
f.mallocd = 0;
|
|
f.offset = 0;
|
|
fr.f = &f;
|
|
f.timelen = 0;
|
|
schedule_delivery(iaxfrdup2(&fr, 0));
|
|
break;
|
|
case AST_IAX_COMMAND_AUTHREQ:
|
|
((char *)f.data)[f.datalen] = '\0';
|
|
if (authenticate_reply(iaxs[fr.callno], &iaxs[fr.callno]->addr, (char *)f.data)) {
|
|
ast_log(LOG_WARNING,
|
|
"I don't know how to authenticate %s to %s\n",
|
|
f.data, inet_ntoa(iaxs[fr.callno]->addr.sin_addr));
|
|
iax_destroy(fr.callno);
|
|
}
|
|
break;
|
|
case AST_IAX_COMMAND_AUTHREP:
|
|
((char *)f.data)[f.datalen] = '\0';
|
|
if (authenticate_verify(iaxs[fr.callno], (char *)f.data)) {
|
|
ast_log(LOG_NOTICE, "Host %s failed to authenticate as %s\n", inet_ntoa(iaxs[fr.callno]->addr.sin_addr), iaxs[fr.callno]->username);
|
|
send_command(iaxs[fr.callno], AST_FRAME_IAX, AST_IAX_COMMAND_REJECT, 0, "No authority found", strlen("No authority found"), -1);
|
|
/* XXX Not guaranteed to work, but probably does XXX */
|
|
pthread_mutex_lock(&iaxq.lock);
|
|
send_packet(iaxq.tail);
|
|
pthread_mutex_unlock(&iaxq.lock);
|
|
iax_destroy(fr.callno);
|
|
break;
|
|
}
|
|
if (option_verbose > 2)
|
|
ast_verbose(VERBOSE_PREFIX_3 "Accepting AUTHENTICATED call from %s, formats = %dn", inet_ntoa(sin.sin_addr), iaxs[fr.callno]->peerformats);
|
|
/* Authentication is fine, go ahead */
|
|
send_command(iaxs[fr.callno], AST_FRAME_IAX, AST_IAX_COMMAND_ACCEPT, 0, NULL, 0, -1);
|
|
iaxs[fr.callno]->state |= IAX_STATE_STARTED;
|
|
if(!(c = ast_iax_new(iaxs[fr.callno], AST_STATE_RING)))
|
|
iax_destroy(fr.callno);
|
|
else
|
|
c->nativeformats = iaxs[fr.callno]->peerformats;
|
|
break;
|
|
case AST_IAX_COMMAND_INVAL:
|
|
iaxs[fr.callno]->error = ENOTCONN;
|
|
iax_destroy(fr.callno);
|
|
if (option_debug)
|
|
ast_log(LOG_DEBUG, "Destroying call %d\n", fr.callno);
|
|
break;
|
|
default:
|
|
ast_log(LOG_DEBUG, "Unknown IAX command %d on %d/%d\n", f.subclass, fr.callno, iaxs[fr.callno]->peercallno);
|
|
}
|
|
/* Don't actually pass these frames along */
|
|
pthread_mutex_unlock(&iaxs_lock);
|
|
return 1;
|
|
}
|
|
} else {
|
|
/* A mini frame */
|
|
f.frametype = AST_FRAME_VOICE;
|
|
if (iaxs[fr.callno]->voiceformat > 0)
|
|
f.subclass = iaxs[fr.callno]->voiceformat;
|
|
else {
|
|
ast_log(LOG_WARNING, "Received mini frame before first full voice frame\n ");
|
|
pthread_mutex_unlock(&iaxs_lock);
|
|
return 1;
|
|
}
|
|
f.datalen = res - sizeof(struct ast_iax_mini_hdr);
|
|
if (f.datalen < 0) {
|
|
ast_log(LOG_WARNING, "Datalen < 0?\n");
|
|
pthread_mutex_unlock(&iaxs_lock);
|
|
return 1;
|
|
}
|
|
if (f.datalen)
|
|
f.data = buf + sizeof(struct ast_iax_mini_hdr);
|
|
else
|
|
f.data = NULL;
|
|
fr.ts = (iaxs[fr.callno]->last & 0xFFFF0000L) | ntohs(mh->ts);
|
|
}
|
|
/* Don't pass any packets until we're started */
|
|
if (!(iaxs[fr.callno]->state & IAX_STATE_STARTED)) {
|
|
pthread_mutex_unlock(&iaxs_lock);
|
|
return 1;
|
|
}
|
|
/* Common things */
|
|
snprintf(src, sizeof(src), "IAX/%s/%d", inet_ntoa(sin.sin_addr),fr.callno);
|
|
f.src = src;
|
|
f.mallocd = 0;
|
|
f.offset = 0;
|
|
fr.f = &f;
|
|
if (f.datalen && (f.frametype == AST_FRAME_VOICE))
|
|
f.timelen = get_timelen(&f);
|
|
else
|
|
f.timelen = 0;
|
|
|
|
/* If this is our most recent packet, use it as our basis for timestamping */
|
|
if (iaxs[fr.callno]->last < fr.ts) {
|
|
iaxs[fr.callno]->last = fr.ts;
|
|
fr.outoforder = 0;
|
|
} else {
|
|
if (option_debug)
|
|
ast_log(LOG_DEBUG, "Received out of order packet... (type=%d, subclass %d, ts = %d, last = %d)\n", f.frametype, f.subclass, fr.ts, iaxs[fr.callno]->last);
|
|
fr.outoforder = -1;
|
|
}
|
|
schedule_delivery(iaxfrdup2(&fr, 0));
|
|
/* Always run again */
|
|
pthread_mutex_unlock(&iaxs_lock);
|
|
return 1;
|
|
}
|
|
|
|
static void free_ha(struct iax_ha *ha)
|
|
{
|
|
struct iax_ha *hal;
|
|
while(ha) {
|
|
hal = ha;
|
|
ha = ha->next;
|
|
free(hal);
|
|
}
|
|
}
|
|
|
|
static void free_context(struct iax_context *con)
|
|
{
|
|
struct iax_context *conl;
|
|
while(con) {
|
|
conl = con;
|
|
con = con->next;
|
|
free(conl);
|
|
}
|
|
}
|
|
|
|
static struct ast_channel *iax_request(char *type, int format, void *data)
|
|
{
|
|
int callno;
|
|
int res;
|
|
int fmt, native;
|
|
struct sockaddr_in sin;
|
|
char s[256];
|
|
char *st;
|
|
struct ast_channel *c;
|
|
strncpy(s, (char *)data, sizeof(s));
|
|
strtok(s, "/");
|
|
strtok(s, "@");
|
|
st = strtok(NULL, "@");
|
|
if (!st)
|
|
st = s;
|
|
/* Populate our address from the given */
|
|
if (create_addr(&sin, st)) {
|
|
ast_log(LOG_WARNING, "Unable to assign address for %s\n", st);
|
|
return NULL;
|
|
}
|
|
pthread_mutex_lock(&iaxs_lock);
|
|
callno = find_callno(-1, -1, &sin, NEW_FORCE);
|
|
if (callno < 0) {
|
|
ast_log(LOG_WARNING, "Unable to create call\n");
|
|
return NULL;
|
|
}
|
|
c = ast_iax_new(iaxs[callno], AST_STATE_DOWN);
|
|
if (c) {
|
|
/* Choose a format we can live with */
|
|
if (c->nativeformats & format)
|
|
c->nativeformats &= format;
|
|
else {
|
|
native = c->nativeformats;
|
|
fmt = format;
|
|
res = ast_translator_best_choice(&fmt, &native);
|
|
if (res < 0) {
|
|
ast_log(LOG_WARNING, "Unable to create translator path for %d to %d on %s\n", c->nativeformats, fmt, c->name);
|
|
ast_hangup(c);
|
|
return NULL;
|
|
}
|
|
c->nativeformats = native;
|
|
}
|
|
}
|
|
pthread_mutex_unlock(&iaxs_lock);
|
|
return c;
|
|
}
|
|
|
|
static void *network_thread(void *ignore)
|
|
{
|
|
/* Our job is simple: Send queued messages, retrying if necessary. Read frames
|
|
from the network, and queue them for delivery to the channels */
|
|
int res;
|
|
struct ast_iax_frame *f, *freeme;
|
|
/* Establish I/O callback for socket read */
|
|
ast_io_add(io, netsocket, socket_read, AST_IO_IN, NULL);
|
|
pthread_mutex_lock(&iaxs_lock);
|
|
for(;;) {
|
|
/* Go through the queue, sending messages which have not yet been
|
|
sent, and scheduling retransmissions if appropriate */
|
|
pthread_mutex_lock(&iaxq.lock);
|
|
f = iaxq.head;
|
|
while(f) {
|
|
freeme = NULL;
|
|
if (!f->sentyet) {
|
|
f->sentyet++;
|
|
/* Send a copy immediately */
|
|
if (iaxs[f->callno]) {
|
|
send_packet(f);
|
|
}
|
|
if (f->retries < 0) {
|
|
/* This is not supposed to be retransmitted */
|
|
if (f->prev)
|
|
f->prev->next = f->next;
|
|
else
|
|
iaxq.head = f->next;
|
|
if (f->next)
|
|
f->next->prev = f->prev;
|
|
else
|
|
iaxq.tail = f->prev;
|
|
iaxq.count--;
|
|
/* Free the frame */
|
|
ast_frfree(f->f);
|
|
/* Free the iax frame */
|
|
freeme = f;
|
|
} else {
|
|
/* We need reliable delivery. Schedule a retransmission */
|
|
f->retries++;
|
|
ast_sched_add(sched, f->retrytime, attempt_transmit, f);
|
|
}
|
|
}
|
|
f = f->next;
|
|
if (freeme)
|
|
free(freeme);
|
|
}
|
|
pthread_mutex_unlock(&iaxq.lock);
|
|
pthread_mutex_unlock(&iaxs_lock);
|
|
res = ast_sched_wait(sched);
|
|
res = ast_io_wait(io, res);
|
|
pthread_mutex_lock(&iaxs_lock);
|
|
if (res >= 0) {
|
|
ast_sched_runq(sched);
|
|
}
|
|
}
|
|
}
|
|
|
|
static int start_network_thread()
|
|
{
|
|
return pthread_create(&netthreadid, NULL, network_thread, NULL);
|
|
}
|
|
|
|
static struct iax_context *build_context(char *context)
|
|
{
|
|
struct iax_context *con = malloc(sizeof(struct iax_context));
|
|
if (con) {
|
|
strncpy(con->context, context, sizeof(con->context));
|
|
con->next = NULL;
|
|
}
|
|
return con;
|
|
}
|
|
|
|
static struct iax_ha *build_ha(char *sense, char *stuff)
|
|
{
|
|
struct iax_ha *ha = malloc(sizeof(struct iax_ha));
|
|
char *nm;
|
|
if (ha) {
|
|
strtok(stuff, "/");
|
|
nm = strtok(NULL, "/");
|
|
if (!nm)
|
|
nm = "255.255.255.255";
|
|
if (!inet_aton(stuff, &ha->netaddr)) {
|
|
ast_log(LOG_WARNING, "%s not a valid IP\n", stuff);
|
|
free(ha);
|
|
return NULL;
|
|
}
|
|
if (!inet_aton(nm, &ha->netmask)) {
|
|
ast_log(LOG_WARNING, "%s not a valid netmask\n", nm);
|
|
free(ha);
|
|
return NULL;
|
|
}
|
|
ha->netaddr.s_addr &= ha->netmask.s_addr;
|
|
if (!strcasecmp(sense, "a")) {
|
|
ha->sense = IAX_SENSE_ALLOW;
|
|
} else {
|
|
ha->sense = IAX_SENSE_DENY;
|
|
}
|
|
ha->next = NULL;
|
|
}
|
|
return ha;
|
|
}
|
|
|
|
static struct iax_peer *build_peer(char *name, struct ast_variable *v)
|
|
{
|
|
struct iax_peer *peer;
|
|
int maskfound=0;
|
|
struct hostent *hp;
|
|
peer = malloc(sizeof(struct iax_peer));
|
|
if (peer) {
|
|
memset(peer, 0, sizeof(struct iax_peer));
|
|
strncpy(peer->name, name, sizeof(peer->name));
|
|
peer->addr.sin_port = htons(AST_DEFAULT_IAX_PORTNO);
|
|
while(v) {
|
|
if (!strcasecmp(v->name, "secret"))
|
|
strncpy(peer->secret, v->value, sizeof(peer->secret));
|
|
else if (!strcasecmp(v->name, "host")) {
|
|
if (!strcasecmp(v->value, "dynamic")) {
|
|
/* They'll register with us */
|
|
peer->dynamic = 1;
|
|
memset(&peer->addr.sin_addr, 0, 4);
|
|
} else {
|
|
peer->dynamic = 0;
|
|
hp = gethostbyname(v->value);
|
|
if (hp) {
|
|
memcpy(&peer->addr.sin_addr, hp->h_addr, sizeof(peer->addr.sin_addr));
|
|
} else {
|
|
ast_log(LOG_WARNING, "Unable to lookup '%s'\n", v->value);
|
|
free(peer);
|
|
return NULL;
|
|
}
|
|
if (!maskfound)
|
|
inet_aton("255.255.255.255", &peer->mask);
|
|
}
|
|
}
|
|
else if (!strcasecmp(v->name, "mask")) {
|
|
maskfound++;
|
|
inet_aton(v->value, &peer->mask);
|
|
} else if (!strcasecmp(v->name, "port"))
|
|
peer->addr.sin_port = htons(atoi(v->value));
|
|
else if (!strcasecmp(v->name, "username"))
|
|
strncpy(peer->username, v->value, sizeof(peer->username));
|
|
v=v->next;
|
|
}
|
|
}
|
|
return peer;
|
|
}
|
|
|
|
static struct iax_user *build_user(char *name, struct ast_variable *v)
|
|
{
|
|
struct iax_user *user;
|
|
struct iax_context *con, *conl = NULL;
|
|
struct iax_ha *ha, *hal = NULL;
|
|
user = (struct iax_user *)malloc(sizeof(struct iax_user));
|
|
if (user) {
|
|
memset(user, 0, sizeof(struct iax_user));
|
|
strncpy(user->name, name, sizeof(user->name));
|
|
while(v) {
|
|
if (!strcasecmp(v->name, "context")) {
|
|
con = build_context(v->value);
|
|
if (con) {
|
|
if (conl)
|
|
conl->next = con;
|
|
else
|
|
user->contexts = con;
|
|
conl = con;
|
|
}
|
|
} else if (!strcasecmp(v->name, "allow") ||
|
|
!strcasecmp(v->name, "deny")) {
|
|
ha = build_ha(v->name, v->value);
|
|
if (ha) {
|
|
if (hal)
|
|
hal->next = ha;
|
|
else
|
|
user->ha = ha;
|
|
hal = ha;
|
|
}
|
|
} else if (!strcasecmp(v->name, "auth")) {
|
|
strncpy(user->methods, v->value, sizeof(user->methods));
|
|
} else if (!strcasecmp(v->name, "secret")) {
|
|
strncpy(user->secret, v->value, sizeof(user->secret));
|
|
}
|
|
v = v->next;
|
|
}
|
|
}
|
|
return user;
|
|
}
|
|
|
|
int load_module()
|
|
{
|
|
int res = 0;
|
|
struct ast_config *cfg;
|
|
struct ast_variable *v;
|
|
struct iax_user *user;
|
|
struct iax_peer *peer;
|
|
char *cat;
|
|
char *utype;
|
|
int format;
|
|
|
|
struct sockaddr_in sin;
|
|
|
|
sin.sin_family = AF_INET;
|
|
sin.sin_port = ntohs(AST_DEFAULT_IAX_PORTNO);
|
|
sin.sin_addr.s_addr = INADDR_ANY;
|
|
|
|
io = io_context_create();
|
|
sched = sched_context_create();
|
|
|
|
if (!io || !sched) {
|
|
ast_log(LOG_ERROR, "Out of memory\n");
|
|
return -1;
|
|
}
|
|
|
|
pthread_mutex_init(&iaxq.lock, NULL);
|
|
pthread_mutex_init(&userl.lock, NULL);
|
|
|
|
ast_cli_register(&cli_show_users);
|
|
ast_cli_register(&cli_show_channels);
|
|
ast_cli_register(&cli_show_peers);
|
|
ast_cli_register(&cli_set_jitter);
|
|
#ifdef IAX_SIMULATOR
|
|
ast_cli_register(&delay_cli);
|
|
ast_cli_register(&deviation_cli);
|
|
ast_cli_register(&reliability_cli);
|
|
ast_cli_register(&sim_show_cli);
|
|
#endif
|
|
cfg = ast_load(config);
|
|
|
|
if (!cfg) {
|
|
ast_log(LOG_ERROR, "Unable to load config %s\n", config);
|
|
return -1;
|
|
}
|
|
v = ast_variable_browse(cfg, "general");
|
|
while(v) {
|
|
if (!strcasecmp(v->name, "port"))
|
|
sin.sin_port = ntohs(atoi(v->value));
|
|
else if (!strcasecmp(v->name, "pingtime"))
|
|
ping_time = atoi(v->value);
|
|
else if (!strcasecmp(v->name, "maxjitterbuffer"))
|
|
maxjitterbuffer = atoi(v->value);
|
|
else if (!strcasecmp(v->name, "maxexcessbuffer"))
|
|
max_jitter_buffer = atoi(v->value);
|
|
else if (!strcasecmp(v->name, "lagrqtime"))
|
|
lagrq_time = atoi(v->value);
|
|
else if (!strcasecmp(v->name, "dropcount"))
|
|
iax_dropcount = atoi(v->value);
|
|
else if (!strcasecmp(v->name, "bindaddr"))
|
|
inet_aton(v->value, &sin.sin_addr);
|
|
else if (!strcasecmp(v->name, "jitterbuffer"))
|
|
use_jitterbuffer = ast_true(v->value);
|
|
else if (!strcasecmp(v->name, "bandwidth")) {
|
|
if (!strcasecmp(v->value, "low")) {
|
|
iax_capability = IAX_CAPABILITY_LOWBANDWIDTH;
|
|
} else if (!strcasecmp(v->value, "medium")) {
|
|
iax_capability = IAX_CAPABILITY_MEDBANDWIDTH;
|
|
} else if (!strcasecmp(v->value, "high")) {
|
|
iax_capability = IAX_CAPABILITY_FULLBANDWIDTH;
|
|
} else
|
|
ast_log(LOG_WARNING, "bandwidth must be either low, medium, or high\n");
|
|
} else if (!strcasecmp(v->name, "allow")) {
|
|
format = ast_getformatbyname(v->value);
|
|
if (format < 1)
|
|
ast_log(LOG_WARNING, "Cannot allow unknown format '%s'\n", v->value);
|
|
else
|
|
iax_capability |= format;
|
|
} else if (!strcasecmp(v->name, "disallow")) {
|
|
format = ast_getformatbyname(v->value);
|
|
if (format < 1)
|
|
ast_log(LOG_WARNING, "Cannot disallow unknown format '%s'\n", v->value);
|
|
else
|
|
iax_capability &= ~format;
|
|
}
|
|
v = v->next;
|
|
}
|
|
cat = ast_category_browse(cfg, NULL);
|
|
while(cat) {
|
|
if (strcasecmp(cat, "general")) {
|
|
utype = ast_variable_retrieve(cfg, cat, "type");
|
|
if (utype) {
|
|
if (!strcasecmp(utype, "user")) {
|
|
user = build_user(cat, ast_variable_browse(cfg, cat));
|
|
if (user) {
|
|
pthread_mutex_lock(&userl.lock);
|
|
user->next = userl.users;
|
|
userl.users = user;
|
|
pthread_mutex_unlock(&userl.lock);
|
|
}
|
|
} else if (!strcasecmp(utype, "peer")) {
|
|
peer = build_peer(cat, ast_variable_browse(cfg, cat));
|
|
if (peer) {
|
|
pthread_mutex_lock(&peerl.lock);
|
|
peer->next = peerl.peers;
|
|
peerl.peers = peer;
|
|
pthread_mutex_unlock(&peerl.lock);
|
|
}
|
|
} else {
|
|
ast_log(LOG_WARNING, "Unknown type '%s' for '%s' in %s\n", utype, cat, config);
|
|
}
|
|
} else
|
|
ast_log(LOG_WARNING, "Section '%s' lacks type\n", cat);
|
|
}
|
|
cat = ast_category_browse(cfg, cat);
|
|
}
|
|
ast_destroy(cfg);
|
|
if (ast_channel_register(type, tdesc, iax_capability, iax_request)) {
|
|
ast_log(LOG_ERROR, "Unable to register channel class %s\n", type);
|
|
unload_module();
|
|
return -1;
|
|
}
|
|
|
|
/* Make a UDP socket */
|
|
netsocket = socket(AF_INET, SOCK_DGRAM, IPPROTO_IP);
|
|
|
|
if (netsocket < 0) {
|
|
ast_log(LOG_ERROR, "Unable to create network socket: %s\n", strerror(errno));
|
|
return -1;
|
|
}
|
|
if (bind(netsocket, &sin, sizeof(sin))) {
|
|
ast_log(LOG_ERROR, "Unable to bind to %s port %d\n", inet_ntoa(sin.sin_addr), ntohs(sin.sin_port));
|
|
return -1;
|
|
}
|
|
|
|
if (!res) {
|
|
res = start_network_thread();
|
|
if (option_verbose > 1)
|
|
ast_verbose(VERBOSE_PREFIX_2 "IAX Ready and Listening on %s port %d\n", inet_ntoa(sin.sin_addr), ntohs(sin.sin_port));
|
|
} else {
|
|
ast_log(LOG_ERROR, "Unable to start network thread\n");
|
|
close(netsocket);
|
|
}
|
|
return res;
|
|
}
|
|
|
|
char *description()
|
|
{
|
|
return desc;
|
|
}
|
|
|
|
int unload_module()
|
|
{
|
|
struct iax_user *user, *userlast;
|
|
struct iax_peer *peer, *peerlast;
|
|
int x;
|
|
/* Cancel the network thread, close the net socket */
|
|
pthread_cancel(netthreadid);
|
|
pthread_join(netthreadid, NULL);
|
|
close(netsocket);
|
|
for (x=0;x<AST_IAX_MAX_CALLS;x++)
|
|
if (iaxs[x])
|
|
iax_destroy(x);
|
|
ast_cli_unregister(&cli_show_users);
|
|
ast_cli_unregister(&cli_show_channels);
|
|
ast_cli_unregister(&cli_show_peers);
|
|
ast_cli_unregister(&cli_set_jitter);
|
|
#ifdef IAX_SIMULATOR
|
|
ast_cli_unregister(&delay_cli);
|
|
ast_cli_unregister(&deviation_cli);
|
|
ast_cli_unregister(&reliability_cli);
|
|
ast_cli_unregister(&sim_show_cli);
|
|
#endif
|
|
for (user=userl.users;user;) {
|
|
free_ha(user->ha);
|
|
free_context(user->contexts);
|
|
userlast = user;
|
|
user=user->next;
|
|
free(userlast);
|
|
}
|
|
for (peer=peerl.peers;peer;) {
|
|
peerlast = peer;
|
|
peer=peer->next;
|
|
free(peerlast);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int usecount()
|
|
{
|
|
int res;
|
|
pthread_mutex_lock(&usecnt_lock);
|
|
res = usecnt;
|
|
pthread_mutex_unlock(&usecnt_lock);
|
|
return res;
|
|
}
|
|
|
|
char *key()
|
|
{
|
|
return ASTERISK_GPL_KEY;
|
|
}
|