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-rw-r--r--CREDITS4
-rw-r--r--channels/chan_iax2.c104
-rw-r--r--configs/iax.conf.sample9
3 files changed, 103 insertions, 14 deletions
diff --git a/CREDITS b/CREDITS
index a51638214..248a7eaad 100644
--- a/CREDITS
+++ b/CREDITS
@@ -131,7 +131,7 @@ Slav Klenov & Vanheuverzwijn Joachim - development of the generic jitterbuffer
Roy Sigurd Karlsbakk - providing funding for generic jitterbuffer development
roy@karlsbakk.net, Briiz Telecom AS
-Voop A/S, Nuvio Inc, Inotel S.A and Foniris Telecom A/S - funding for rewrite of SIP transfers
+Voop AS, Nuvio Inc, Inotel S.A and Foniris Telecom A/S - funding for rewrite of SIP transfers
Philippe Sultan - RADIUS CDR module
INRIA, http://www.inria.fr/
@@ -152,6 +152,8 @@ James Rothenberger - Support for IMAP storage integration added by OneBizTone LL
Paul Cadach - Bringing chan_h323 up to date, bug fixes, and more!
+Voop AS - Financial support for a lot of work with the SIP driver and the IAX trunk MTU patch
+
=== OTHER CONTRIBUTIONS ===
John Todd - Monkey sounds and associated teletorture prompt
Michael Jerris - bug marshaling
diff --git a/channels/chan_iax2.c b/channels/chan_iax2.c
index 108846d6b..79aa93447 100644
--- a/channels/chan_iax2.c
+++ b/channels/chan_iax2.c
@@ -140,6 +140,15 @@ static struct ast_codec_pref prefs;
static const char tdesc[] = "Inter Asterisk eXchange Driver (Ver 2)";
+
+/*! \brief Maximum transimission unit for the UDP packet in the trunk not to be
+ fragmented. This is based on 1516 - ethernet - ip - udp - iax minus one g711 frame = 1240 */
+#define MAX_TRUNK_MTU 1240
+
+static int global_max_trunk_mtu; /*!< Maximum MTU, 0 if not used */
+static int trunk_timed, trunk_untimed, trunk_maxmtu, trunk_nmaxmtu ; /*!< Trunk MTU statistics */
+
+
static char context[80] = "default";
static char language[MAX_LANGUAGE] = "";
@@ -183,8 +192,7 @@ int (*iax2_regfunk)(const char *username, int onoff) = NULL;
#define IAX_CAPABILITY_MEDBANDWIDTH (IAX_CAPABILITY_FULLBANDWIDTH & \
~AST_FORMAT_SLINEAR & \
~AST_FORMAT_ULAW & \
- ~AST_FORMAT_ALAW & \
- ~AST_FORMAT_G722)
+ ~AST_FORMAT_ALAW)
/* A modem */
#define IAX_CAPABILITY_LOWBANDWIDTH (IAX_CAPABILITY_MEDBANDWIDTH & \
~AST_FORMAT_G726 & \
@@ -374,6 +382,7 @@ struct iax2_trunk_peer {
unsigned char *trunkdata;
unsigned int trunkdatalen;
unsigned int trunkdataalloc;
+ int trunkmaxmtu;
int trunkerror;
int calls;
AST_LIST_ENTRY(iax2_trunk_peer) list;
@@ -787,6 +796,7 @@ static int iax2_sendtext(struct ast_channel *c, const char *text);
static int iax2_setoption(struct ast_channel *c, int option, void *data, int datalen);
static int iax2_transfer(struct ast_channel *c, const char *dest);
static int iax2_write(struct ast_channel *c, struct ast_frame *f);
+static int send_trunk(struct iax2_trunk_peer *tpeer, struct timeval *now);
static int send_command(struct chan_iax2_pvt *, char, int, unsigned int, const unsigned char *, int, int);
static int send_command_final(struct chan_iax2_pvt *, char, int, unsigned int, const unsigned char *, int, int);
static int send_command_immediate(struct chan_iax2_pvt *, char, int, unsigned int, const unsigned char *, int, int);
@@ -1752,7 +1762,7 @@ retry:
iax2_frame_free(frame.data);
jb_destroy(pvt->jb);
/* gotta free up the stringfields */
- ast_string_field_free_pools(pvt);
+ ast_string_field_free_all(pvt);
free(pvt);
}
}
@@ -2057,11 +2067,44 @@ static int iax2_show_stats(int fd, int argc, char *argv[])
ast_cli(fd, " IAX Statistics\n");
ast_cli(fd, "---------------------\n");
ast_cli(fd, "Outstanding frames: %d (%d ingress, %d egress)\n", iax_get_frames(), iax_get_iframes(), iax_get_oframes());
+ ast_cli(fd, "%d timed and %d untimed transmits; MTU %d/%d/%d\n", trunk_timed, trunk_untimed,
+ trunk_maxmtu, trunk_nmaxmtu, global_max_trunk_mtu);
+
ast_cli(fd, "Packets in transmit queue: %d dead, %d final, %d total\n\n", dead, final, cnt);
+
+ trunk_timed = trunk_untimed = 0;
+ if (trunk_maxmtu > trunk_nmaxmtu)
+ trunk_nmaxmtu = trunk_maxmtu;
return RESULT_SUCCESS;
}
+/*! \brief Set trunk MTU from CLI */
+static int iax2_set_mtu(int fd, int argc, char *argv[])
+{
+ int mtuv;
+
+ if (argc != 4)
+ return RESULT_SHOWUSAGE;
+ if (strncasecmp(argv[3], "default", strlen(argv[3])) == 0)
+ mtuv = MAX_TRUNK_MTU;
+ else
+ mtuv = atoi(argv[3]);
+
+ if (mtuv == 0) {
+ ast_cli(fd, "Trunk MTU control disabled (mtu was %d)\n", global_max_trunk_mtu);
+ global_max_trunk_mtu = 0;
+ return RESULT_SUCCESS;
+ }
+ if (mtuv < 172 || mtuv > 4000) {
+ ast_cli(fd, "Trunk MTU must be between 172 and 4000\n");
+ return RESULT_SHOWUSAGE;
+ }
+ ast_cli(fd, "Trunk MTU changed from %d to %d\n", global_max_trunk_mtu, mtuv);
+ global_max_trunk_mtu = mtuv;
+ return RESULT_SUCCESS;
+}
+
static int iax2_show_cache(int fd, int argc, char *argv[])
{
struct iax2_dpcache *dp = NULL;
@@ -2882,9 +2925,6 @@ static int iax2_call(struct ast_channel *c, char *dest, int timeout)
iaxs[callno]->initid = ast_sched_add(sched, autokill * 2, auto_congest, CALLNO_TO_PTR(callno));
}
- /* send the command using the appropriate socket for this peer */
- iaxs[callno]->sockfd = cai.sockfd;
-
/* Transmit the string in a "NEW" request */
send_command(iaxs[callno], AST_FRAME_IAX, IAX_COMMAND_NEW, 0, ied.buf, ied.pos, -1);
@@ -3526,6 +3566,8 @@ static int iax2_trunk_queue(struct chan_iax2_pvt *pvt, struct iax_frame *fr)
struct ast_frame *f;
struct iax2_trunk_peer *tpeer;
void *tmp, *ptr;
+ struct timeval now;
+ int res;
struct ast_iax2_meta_trunk_entry *met;
struct ast_iax2_meta_trunk_mini *mtm;
@@ -3574,6 +3616,18 @@ static int iax2_trunk_queue(struct chan_iax2_pvt *pvt, struct iax_frame *fr)
tpeer->trunkdatalen += f->datalen;
tpeer->calls++;
+
+ /* track the largest mtu we actually have sent */
+ if (tpeer->trunkdatalen + f->datalen + 4 > trunk_maxmtu)
+ trunk_maxmtu = tpeer->trunkdatalen + f->datalen + 4 ;
+
+ /* if we have enough for a full MTU, ship it now without waiting */
+ if (global_max_trunk_mtu > 0 && tpeer->trunkdatalen + f->datalen + 4 >= global_max_trunk_mtu) {
+ gettimeofday(&now, NULL);
+ res = send_trunk(tpeer, &now);
+ trunk_untimed ++;
+ }
+
ast_mutex_unlock(&tpeer->lock);
}
return 0;
@@ -5936,6 +5990,7 @@ static int timing_read(int *id, int fd, short events, void *cbdata)
drop = tpeer;
} else {
res = send_trunk(tpeer, &now);
+ trunk_timed++;
if (iaxtrunkdebug)
ast_verbose(" - Trunk peer (%s:%d) has %d call chunk%s in transit, %d bytes backloged and has hit a high water mark of %d bytes\n", ast_inet_ntoa(tpeer->addr.sin_addr), ntohs(tpeer->addr.sin_port), res, (res != 1) ? "s" : "", tpeer->trunkdatalen, tpeer->trunkdataalloc);
}
@@ -8310,7 +8365,7 @@ static struct iax2_peer *build_peer(const char *name, struct ast_variable *v, st
peer->expire = -1;
ast_clear_flag(peer, IAX_DYNAMIC);
if (ast_dnsmgr_lookup(v->value, &peer->addr.sin_addr, &peer->dnsmgr)) {
- ast_string_field_free_pools(peer);
+ ast_string_field_free_all(peer);
free(peer);
return NULL;
}
@@ -8321,7 +8376,7 @@ static struct iax2_peer *build_peer(const char *name, struct ast_variable *v, st
inet_aton("255.255.255.255", &peer->mask);
} else if (!strcasecmp(v->name, "defaultip")) {
if (ast_get_ip(&peer->defaddr, v->value)) {
- ast_string_field_free_pools(peer);
+ ast_string_field_free_all(peer);
free(peer);
return NULL;
}
@@ -8457,7 +8512,7 @@ static struct iax2_user *build_user(const char *name, struct ast_variable *v, st
if (user) {
if (firstpass) {
- ast_string_field_free_pools(user);
+ ast_string_field_free_all(user);
memset(user, 0, sizeof(struct iax2_user));
if (ast_string_field_init(user, 32)) {
free(user);
@@ -8655,7 +8710,7 @@ static void destroy_user(struct iax2_user *user)
ast_variables_destroy(user->vars);
user->vars = NULL;
}
- ast_string_field_free_pools(user);
+ ast_string_field_free_all(user);
free(user);
}
@@ -8696,7 +8751,7 @@ static void destroy_peer(struct iax2_peer *peer)
register_peer_exten(peer, 0);
if (peer->dnsmgr)
ast_dnsmgr_release(peer->dnsmgr);
- ast_string_field_free_pools(peer);
+ ast_string_field_free_all(peer);
free(peer);
}
@@ -8743,6 +8798,7 @@ static int set_config(char *config_file, int reload)
int format;
int portno = IAX_DEFAULT_PORTNO;
int x;
+ int mtuv;
struct iax2_user *user;
struct iax2_peer *peer;
struct ast_netsock *ns;
@@ -8904,6 +8960,15 @@ static int set_config(char *config_file, int reload)
trunkfreq = atoi(v->value);
if (trunkfreq < 10)
trunkfreq = 10;
+ } else if (!strcasecmp(v->name, "trunkmtu")) {
+ mtuv = atoi(v->value);
+ if (mtuv == 0 )
+ global_max_trunk_mtu = 0;
+ else if (mtuv >= 172 && mtuv < 4000)
+ global_max_trunk_mtu = mtuv;
+ else
+ ast_log(LOG_NOTICE, "trunkmtu value out of bounds (%d) at line %d\n",
+ mtuv, v->lineno);
} else if (!strcasecmp(v->name, "autokill")) {
if (sscanf(v->value, "%d", &x) == 1) {
if (x >= 0)
@@ -9086,6 +9151,7 @@ static int reload_config(void)
strcpy(language, "");
strcpy(mohinterpret, "default");
strcpy(mohsuggest, "");
+ global_max_trunk_mtu = MAX_TRUNK_MTU;
amaflags = 0;
delayreject = 0;
ast_clear_flag((&globalflags), IAX_NOTRANSFER);
@@ -9096,6 +9162,9 @@ static int reload_config(void)
set_config(config,1);
prune_peers();
prune_users();
+ trunk_timed = trunk_untimed = 0;
+ trunk_nmaxmtu = trunk_maxmtu = 0;
+
for (reg = registrations; reg; reg = reg->next)
iax2_do_register(reg);
/* Qualify hosts, too */
@@ -9577,6 +9646,13 @@ static char show_stats_usage[] =
"Usage: iax2 list stats\n"
" Display statistics on IAX channel driver.\n";
+static char set_mtu_usage[] =
+"Usage: iax2 set mtu <value>\n"
+" Set the system-wide IAX IP mtu to <value> bytes net or zero to disable.\n"
+" Disabling means that the operating system must handle fragmentation of UDP packets\n"
+" when the IAX2 trunk packet exceeds the UDP payload size.\n"
+" This is substantially below the IP mtu. Try 1240 on ethernets.\n"
+" Must be 172 or greater for G.711 samples.\n";
static char show_cache_usage[] =
"Usage: iax2 list cache\n"
" Display currently cached IAX Dialplan results.\n";
@@ -9706,6 +9782,10 @@ static struct ast_cli_entry cli_iax2[] = {
iax2_show_threads, "Display IAX helper thread info",
show_threads_usage },
+ { { "iax2", "set", "mtu", NULL },
+ iax2_set_mtu, "Set the IAX systemwide trunking MTU",
+ set_mtu_usage, NULL, NULL },
+
{ { "iax2", "list", "users", NULL },
iax2_show_users, "List defined IAX users",
show_users_usage },
@@ -9884,8 +9964,6 @@ static int load_module(void)
for (x=0;x<IAX_MAX_CALLS;x++)
ast_mutex_init(&iaxsl[x]);
- ast_cond_init(&sched_cond, NULL);
-
if (!(sched = sched_context_create())) {
ast_log(LOG_ERROR, "Failed to create scheduler context\n");
return AST_MODULE_LOAD_FAILURE;
diff --git a/configs/iax.conf.sample b/configs/iax.conf.sample
index 234d18e9e..adb9f02a5 100644
--- a/configs/iax.conf.sample
+++ b/configs/iax.conf.sample
@@ -156,7 +156,16 @@ forcejitterbuffer=no
; minregexpire = 60
; maxregexpire = 60
;
+; With a large amount of traffic on IAX2 trunks, there is a risk of bad voice quality due to
+; the fact that the IAX2 trunking scheme depends on the Linux system to handle fragmentation of
+; UDP packets. This may not be very efficient.
+; This setting sets the maximum transmission unit for IAX2 UDP trunking.
+; default is 1240 bytes. Zero disables this functionality and let's the O/S handle fragmentation.
+;
+; trunkmtu = 0
+;
; IAX helper threads
+
; Establishes the number of iax helper threads to handle I/O.
; iaxthreadcount = 10
; Establishes the number of extra dynamic threads that may be spawned to handle I/O
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-18 18:18:34 +0000