From 9440db13f49fe217b1f526701a603b8e4db66feb Mon Sep 17 00:00:00 2001
From: Mark Spencer <markster@digium.com>
Date: Thu, 6 Jan 2000 13:24:57 +0000
Subject: [PATCH] Version 0.1.2 from FTP
git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@197 65c4cc65-6c06-0410-ace0-fbb531ad65f3
---
channels/chan_iax.c | 2238 +++++++++++++++++++++++++++++++++++++++
configs/iax.conf.sample | 72 ++
2 files changed, 2310 insertions(+)
create mode 100755 channels/chan_iax.c
create mode 100755 configs/iax.conf.sample
diff --git a/channels/chan_iax.c b/channels/chan_iax.c
new file mode 100755
index 0000000000..f3e7d337e2
--- /dev/null
+++ b/channels/chan_iax.c
@@ -0,0 +1,2238 @@
+/*
+ * Asterisk -- A telephony toolkit for Linux.
+ *
+ * Implementation of Inter-Asterisk eXchange
+ *
+ * Copyright (C) 1999, Mark Spencer
+ *
+ * Mark Spencer <markster@linux-support.net>
+ *
+ * This program is free software, distributed under the terms of
+ * the GNU General Public License
+ */
+
+#include <asterisk/frame.h>
+#include <asterisk/channel.h>
+#include <asterisk/channel_pvt.h>
+#include <asterisk/logger.h>
+#include <asterisk/module.h>
+#include <asterisk/pbx.h>
+#include <asterisk/sched.h>
+#include <asterisk/io.h>
+#include <asterisk/config.h>
+#include <asterisk/options.h>
+#include <asterisk/cli.h>
+#include <asterisk/translate.h>
+#include <asterisk/md5.h>
+#include <arpa/inet.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <sys/time.h>
+#include <sys/signal.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <unistd.h>
+#include <netdb.h>
+
+#include "iax.h"
+
+#define DEFAULT_RETRY_TIME 1000
+#define MEMORY_SIZE 100
+#define DEFAULT_DROP 3
+
+/* If you want to use the simulator, then define IAX_SIMULATOR. */
+
+/*
+#define IAX_SIMULATOR
+*/
+static char *desc = "Inter Asterisk eXchange";
+static char *tdesc = "Inter Asterisk eXchange Drver";
+static char *type = "IAX";
+static char *config = "iax.conf";
+
+static char context[80] = "default";
+
+static int max_retries = 4;
+static int ping_time = 20;
+static int lagrq_time = 10;
+static int nextcallno = 0;
+static int maxjitterbuffer=4000;
+
+static int netsocket = -1;
+
+static int usecnt;
+static pthread_mutex_t usecnt_lock = PTHREAD_MUTEX_INITIALIZER;
+static pthread_mutex_t iaxs_lock = PTHREAD_MUTEX_INITIALIZER;
+
+/* Ethernet, etc */
+#define IAX_CAPABILITY_FULLBANDWIDTH 0x7FFFFFFF
+/* T1, maybe ISDN */
+#define IAX_CAPABILITY_MEDBANDWIDTH (IAX_CAPABILITY_FULLBANDWIDTH & \
+ ~AST_FORMAT_SLINEAR & \
+ ~AST_FORMAT_ULAW & \
+ ~AST_FORMAT_ALAW)
+/* A modem */
+#define IAX_CAPABILITY_LOWBANDWIDTH (IAX_CAPABILITY_MEDBANDWIDTH & \
+ ~AST_FORMAT_MP3 & \
+ ~AST_FORMAT_ADPCM)
+
+#define IAX_CAPABILITY_LOWFREE (IAX_CAPABILITY_LOWBANDWIDTH & \
+ ~AST_FORMAT_G723_1)
+
+static struct io_context *io;
+static struct sched_context *sched;
+
+static int iax_capability = IAX_CAPABILITY_FULLBANDWIDTH;
+
+static int iax_dropcount = DEFAULT_DROP;
+
+static int use_jitterbuffer = 1;
+
+static pthread_t netthreadid;
+
+#define IAX_STATE_STARTED (1 << 0)
+#define IAX_STATE_AUTHENTICATED (1 << 1)
+
+#define IAX_SENSE_DENY 0
+#define IAX_SENSE_ALLOW 1
+
+struct iax_ha {
+ /* Host access rule */
+ struct in_addr netaddr;
+ struct in_addr netmask;
+ int sense;
+ struct iax_ha *next;
+};
+
+struct iax_context {
+ char context[AST_MAX_EXTENSION];
+ struct iax_context *next;
+};
+
+struct iax_user {
+ char name[80];
+ char secret[80];
+ char methods[80];
+ struct iax_ha *ha;
+ struct iax_context *contexts;
+ struct iax_user *next;
+};
+
+struct iax_peer {
+ char name[80];
+ char username[80];
+ char secret[80];
+ struct sockaddr_in addr;
+ struct in_addr mask;
+ struct iax_peer *next;
+};
+
+/* Don't retry more frequently than every 10 ms, or less frequently than every 5 seconds */
+#define MIN_RETRY_TIME 10
+#define MAX_RETRY_TIME 10000
+#define MAX_JITTER_BUFFER 50
+
+/* If we have more than this much excess real jitter buffer, srhink it. */
+static int max_jitter_buffer = MAX_JITTER_BUFFER;
+
+struct chan_iax_pvt {
+ /* Pipes for communication. pipe[1] belongs to the
+ network thread (write), and pipe[0] belongs to the individual
+ channel (read) */
+ int pipe[2];
+ /* Last received voice format */
+ int voiceformat;
+ /* Last sent voice format */
+ int svoiceformat;
+ /* Last received timestamp */
+ unsigned int last;
+ /* Last sent timestamp - never send the same timestamp twice in a single call */
+ unsigned int lastsent;
+ /* Ping time */
+ unsigned int pingtime;
+ /* Peer Address */
+ struct sockaddr_in addr;
+ /* Our call number */
+ int callno;
+ /* Peer callno */
+ int peercallno;
+ /* Peer supported formats */
+ int peerformats;
+ /* timeval that we base our transmission on */
+ struct timeval offset;
+ /* timeval that we base our delivery on */
+ struct timeval rxcore;
+ /* Historical delivery time */
+ int history[MEMORY_SIZE];
+ /* Current base jitterbuffer */
+ int jitterbuffer;
+ /* Current jitter measure */
+ int jitter;
+ /* LAG */
+ int lag;
+ /* Error, as discovered by the manager */
+ int error;
+ /* Onwer if we have one */
+ struct ast_channel *owner;
+ /* What's our state? */
+ int state;
+ /* Next outgoing sequence number */
+ unsigned short oseqno;
+ /* Next incoming sequence number */
+ unsigned short iseqno;
+ /* Peer name */
+ char peer[80];
+ /* Default Context */
+ char context[80];
+ /* Caller ID if available */
+ char callerid[80];
+ /* DNID */
+ char dnid[80];
+ /* Requested Extension */
+ char exten[AST_MAX_EXTENSION];
+ /* Expected Username */
+ char username[80];
+ /* Expected Secret */
+ char secret[80];
+ /* permitted authentication methods */
+ char methods[80];
+ /* MD5 challenge */
+ char challenge[10];
+};
+
+struct ast_iax_frame {
+ /* Actual, isolated frame */
+ struct ast_frame *f;
+ /* /Our/ call number */
+ short callno;
+ /* Start of raw frame (outgoing only) */
+ void *data;
+ /* Length of frame (outgoing only) */
+ int datalen;
+ /* How many retries so far? */
+ int retries;
+ /* Outgoing relative timestamp (ms) */
+ unsigned int ts;
+ /* How long to wait before retrying */
+ int retrytime;
+ /* Are we received out of order? */
+ int outoforder;
+ /* Have we been sent at all yet? */
+ int sentyet;
+ /* Packet sequence number */
+ int seqno;
+ /* Easy linking */
+ struct ast_iax_frame *next;
+ struct ast_iax_frame *prev;
+};
+
+static struct ast_iax_queue {
+ struct ast_iax_frame *head;
+ struct ast_iax_frame *tail;
+ int count;
+ pthread_mutex_t lock;
+} iaxq;
+
+static struct ast_user_list {
+ struct iax_user *users;
+ pthread_mutex_t lock;
+} userl;
+
+static struct ast_peer_list {
+ struct iax_peer *peers;
+ pthread_mutex_t lock;
+} peerl;
+
+/* XXX We probably should use a mutex when working with this XXX */
+static struct chan_iax_pvt *iaxs[AST_IAX_MAX_CALLS];
+
+static int send_command(struct chan_iax_pvt *, char, int, unsigned int, char *, int, int);
+
+static unsigned int calc_timestamp(struct chan_iax_pvt *p, unsigned int ts);
+
+static int send_ping(void *data)
+{
+ int callno = (long)data;
+ if (iaxs[callno]) {
+ send_command(iaxs[callno], AST_FRAME_IAX, AST_IAX_COMMAND_PING, 0, NULL, 0, -1);
+ return 1;
+ } else
+ return 0;
+}
+
+static int send_lagrq(void *data)
+{
+ int callno = (long)data;
+ if (iaxs[callno]) {
+ send_command(iaxs[callno], AST_FRAME_IAX, AST_IAX_COMMAND_LAGRQ, 0, NULL, 0, -1);
+ return 1;
+ } else
+ return 0;
+}
+
+static unsigned char compress_subclass(int subclass)
+{
+ int x;
+ int power=-1;
+ /* If it's 128 or smaller, just return it */
+ if (subclass < AST_FLAG_SC_LOG)
+ return subclass;
+ /* Otherwise find its power */
+ for (x = 0; x < AST_MAX_SHIFT; x++) {
+ if (subclass & (1 << x)) {
+ if (power > -1) {
+ ast_log(LOG_WARNING, "Can't compress subclass %d\n", subclass);
+ return 0;
+ } else
+ power = x;
+ }
+ }
+ return power | AST_FLAG_SC_LOG;
+}
+
+static int uncompress_subclass(unsigned char csub)
+{
+ /* If the SC_LOG flag is set, return 2^csub otherwise csub */
+ if (csub & AST_FLAG_SC_LOG)
+ return 1 << (csub & ~AST_FLAG_SC_LOG & AST_MAX_SHIFT);
+ else
+ return csub;
+}
+
+static struct chan_iax_pvt *new_iax(void)
+{
+ struct chan_iax_pvt *tmp;
+ tmp = malloc(sizeof(struct chan_iax_pvt));
+ if (tmp) {
+ memset(tmp, 0, sizeof(struct chan_iax_pvt));
+ /* On my linux system, pipe's are more than 2x as fast as socketpairs */
+ if (pipe(tmp->pipe)) {
+ ast_log(LOG_WARNING, "Unable to create pipe: %s\n", strerror(errno));
+ free(tmp);
+ return NULL;
+ }
+ tmp->callno = -1;
+ tmp->peercallno = -1;
+ /* strncpy(tmp->context, context, sizeof(tmp->context)); */
+ strncpy(tmp->exten, "s", sizeof(tmp->exten));
+ }
+ return tmp;
+}
+
+static int get_timelen(struct ast_frame *f)
+{
+ int timelen=0;
+ switch(f->subclass) {
+ case AST_FORMAT_G723_1:
+ timelen = 30;
+ break;
+ case AST_FORMAT_GSM:
+ timelen = 20;
+ break;
+ case AST_FORMAT_SLINEAR:
+ timelen = f->datalen / 8;
+ break;
+ case AST_FORMAT_LPC10:
+ timelen = 22;
+ timelen += ((char *)(f->data))[7] & 0x1;
+ break;
+ default:
+ ast_log(LOG_WARNING, "Don't know how to calculate timelen on %d packets\n", f->subclass);
+ }
+ return timelen;
+}
+
+#if 0
+static struct ast_iax_frame *iaxfrdup(struct ast_iax_frame *fr)
+{
+ /* Malloc() a copy of a frame */
+ struct ast_iax_frame *new = malloc(sizeof(struct ast_iax_frame));
+ if (new)
+ memcpy(new, fr, sizeof(struct ast_iax_frame));
+ return new;
+}
+#endif
+
+static struct ast_iax_frame *iaxfrdup2(struct ast_iax_frame *fr, int ch)
+{
+ /* Malloc() a copy of a frame */
+ struct ast_iax_frame *new = malloc(sizeof(struct ast_iax_frame));
+ if (new) {
+ memcpy(new, fr, sizeof(struct ast_iax_frame));
+ new->f = ast_frdup(fr->f);
+ /* Copy full header */
+ if (ch) {
+ memcpy(new->f->data - sizeof(struct ast_iax_full_hdr),
+ fr->f->data - sizeof(struct ast_iax_full_hdr),
+ sizeof(struct ast_iax_full_hdr));
+ /* Grab new data pointer */
+ new->data = new->f->data - (fr->f->data - fr->data);
+ } else {
+ new->data = NULL;
+ new->datalen = 0;
+ }
+ }
+ return new;
+}
+
+#define NEW_PREVENT 0
+#define NEW_ALLOW 1
+#define NEW_FORCE 2
+
+static int find_callno(short callno, short dcallno ,struct sockaddr_in *sin, int new)
+{
+ int res = -1;
+ int x;
+ int start;
+ if (new <= NEW_ALLOW) {
+ /* Look for an existing connection first */
+ for (x=0;x<AST_IAX_MAX_CALLS;x++) {
+ if (iaxs[x]) {
+ /* Look for an exact match */
+ if ((sin->sin_port == iaxs[x]->addr.sin_port) &&
+ (sin->sin_addr.s_addr == iaxs[x]->addr.sin_addr.s_addr) &&
+ ((callno == iaxs[x]->peercallno) || /* Our expected source call number is the same */
+ ((dcallno == x) && (iaxs[x]->peercallno = -1))
+ /* We have no expected source number, and the destination is right */
+ )) {
+ res = x;
+ break;
+ }
+ }
+ }
+ }
+ if ((res < 0) && (new >= NEW_ALLOW)) {
+ /* Create a new one */
+ start = nextcallno;
+ for (x = nextcallno + 1; iaxs[x] && (x != start); x = (x + 1) % AST_IAX_MAX_CALLS)
+ if (x == start) {
+ ast_log(LOG_WARNING, "Unable to accept more calls\n");
+ return -1;
+ }
+ iaxs[x] = new_iax();
+ if (iaxs[x]) {
+ if (option_debug)
+ ast_log(LOG_DEBUG, "Creating new call structure %d\n", x);
+ iaxs[x]->addr.sin_port = sin->sin_port;
+ iaxs[x]->addr.sin_family = sin->sin_family;
+ iaxs[x]->addr.sin_addr.s_addr = sin->sin_addr.s_addr;
+ iaxs[x]->peercallno = callno;
+ iaxs[x]->callno = x;
+ iaxs[x]->pingtime = DEFAULT_RETRY_TIME;
+ ast_sched_add(sched, ping_time * 1000, send_ping, (void *)x);
+ ast_sched_add(sched, lagrq_time * 1000, send_lagrq, (void *)x);
+ } else
+ ast_log(LOG_DEBUG, "Out of memory\n");
+ res = x;
+ nextcallno = x;
+ }
+ return res;
+}
+
+static int iax_send(struct chan_iax_pvt *pvt, struct ast_frame *f, unsigned int ts, int seqno);
+
+static int do_deliver(void *data)
+{
+ /* Just deliver the packet by writing it to half of the pipe. */
+ struct ast_iax_frame *fr = data;
+ unsigned int ts;
+ if (iaxs[fr->callno]) {
+ if (fr->f->frametype == AST_FRAME_IAX) {
+ /* We have to treat some of these packets specially because
+ they're LAG measurement packets */
+ if (fr->f->subclass == AST_IAX_COMMAND_LAGRQ) {
+ /* If we got a queued request, build a reply and send it */
+ fr->f->subclass = AST_IAX_COMMAND_LAGRP;
+ iax_send(iaxs[fr->callno], fr->f, fr->ts, -1);
+ } else if (fr->f->subclass == AST_IAX_COMMAND_LAGRP) {
+ /* This is a reply we've been given, actually measure the difference */
+ ts = calc_timestamp(iaxs[fr->callno], 0);
+ iaxs[fr->callno]->lag = ts - fr->ts;
+ }
+ } else
+ ast_fr_fdwrite(iaxs[fr->callno]->pipe[1], fr->f);
+ }
+ /* Free the packet */
+ ast_frfree(fr->f);
+ /* And our iax frame */
+ free(fr);
+ /* And don't run again */
+ return 0;
+}
+
+static int handle_error()
+{
+ /* XXX Ideally we should figure out why an error occured and then abort those
+ rather than continuing to try. Unfortunately, the published interface does
+ not seem to work XXX */
+#if 0
+ struct sockaddr_in *sin;
+ int res;
+ struct msghdr m;
+ struct sock_extended_err e;
+ m.msg_name = NULL;
+ m.msg_namelen = 0;
+ m.msg_iov = NULL;
+ m.msg_control = &e;
+ m.msg_controllen = sizeof(e);
+ m.msg_flags = 0;
+ res = recvmsg(netsocket, &m, MSG_ERRQUEUE);
+ if (res < 0)
+ ast_log(LOG_WARNING, "Error detected, but unable to read error: %s\n", strerror(errno));
+ else {
+ if (m.msg_controllen) {
+ sin = (struct sockaddr_in *)SO_EE_OFFENDER(&e);
+ if (sin)
+ ast_log(LOG_WARNING, "Receive error from %s\n", inet_ntoa(sin->sin_addr));
+ else
+ ast_log(LOG_WARNING, "No address detected??\n");
+ } else {
+ ast_log(LOG_WARNING, "Local error: %s\n", strerror(e.ee_errno));
+ }
+ }
+#endif
+ return 0;
+}
+
+#ifdef IAX_SIMULATOR
+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 2 times as long */
+ f->retrytime *= 2;
+ 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 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";
+ 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 (create_addr(&sin, hname)) {
+ ast_log(LOG_WARNING, "No address associated with '%s'\n", hname);
+ return -1;
+ }
+ /* 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->format);
+ 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->format = iax_capability;
+ tmp->pvt->pvt = i;
+ tmp->pvt->send_digit = iax_digit;
+ 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 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);
+ iaxs[fr.callno]->state |= IAX_STATE_STARTED;
+ if(!(c = ast_iax_new(iaxs[fr.callno], AST_STATE_RING)))
+ iax_destroy(fr.callno);
+ else
+ c->format = 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:
+ ((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 (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;
+ 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;
+ }
+ /* 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->format = 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 {
+ 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;
+ 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\n");
+ 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->format & format)
+ c->format &= format;
+ else
+ c->format = ast_translator_best_choice(format, c->format);
+ }
+ 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")) {
+ 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;
+}
+
diff --git a/configs/iax.conf.sample b/configs/iax.conf.sample
new file mode 100755
index 0000000000..62307d5b9a
--- /dev/null
+++ b/configs/iax.conf.sample
@@ -0,0 +1,72 @@
+;
+; Inter-Asterisk eXchange driver definition
+;
+;
+; General settings, like port number to bind to, and
+; an option address (the default is to bind to all
+; local addresses).
+;
+[general]
+port=5036
+;bindaddr=192.168.0.1
+;
+; Specify bandwidth of low, medium, or high to control which codecs are used
+; in general.
+;
+bandwidth=low
+;
+; You can also fine tune codecs here using "allow" and "disallow" clauses
+; with specific codecs. Use "all" to represent all formats.
+;
+;allow=all ; same as bandwidth=high
+;disallow=g723.1 ; Hm... Proprietary, don't use it...
+disallow=lpc10 ; Icky sound quality... Mr. Roboto.
+;allow=gsm ; Always allow GSM, it's cool :)
+;
+; You can also adjust several parameters relating to the jitter
+; buffer. Specifically, you can provide a maximum jitter buffer,
+; you can turn it off entirely, and you can specify an acceptable
+; drop rate (per MEMORY_SIZE, by default 3 of 100). Disabling the
+; jitter buffer is not recommended. Finally, you can specify the maximum
+; excess jitter buffer, which if exceeded, causes the jitter buffer to
+; slowly shrink in order to improve latency.
+;
+;jitterbuffer=no
+;dropcount=3
+;maxjitterbuffer=500
+;maxexccessbuffer=100
+
+;
+; Guest sections for unauthenticated connection attempts. Just
+; specify an empty secret, or provide no secret section.
+;
+[guest]
+type=user
+context=default
+;
+; Further user sections may be added, specifying a context and a
+; secret used for connections with that given authentication name.
+; Limited IP based access control is allowed by use of "allow" and
+; "deny" keywords. Multiple rules are permitted. Multiple permitted
+; contexts may be specified, in which case the first will be the default.
+;
+;[markster]
+;type=user
+;context=default
+;context=local
+;auth=md5,cleartext
+;secret=markpasswd
+;deny=0.0.0.0/0.0.0.0
+;allow=209.16.236.73/255.255.255.0
+;
+; Peers may also be specified, with a secret and
+; a remote hostname.
+;
+[demo]
+type=peer
+username=asterisk
+secret=supersecret
+host=209.16.236.91
+;host=asterisk.linux-support.net
+;port=5036
+;mask=255.255.255.255
--
GitLab