[asterisk-commits] russell: branch 1.4 r86371 - in /branches/1.4: channels/ configs/
SVN commits to the Asterisk project
asterisk-commits at lists.digium.com
Thu Oct 18 16:14:16 CDT 2007
Author: russell
Date: Thu Oct 18 16:14:15 2007
New Revision: 86371
URL: http://svn.digium.com/view/asterisk?view=rev&rev=86371
Log:
Add support for setting the maximum trunk size for IAX2 trunking
Modified:
branches/1.4/channels/chan_iax2.c
branches/1.4/configs/iax.conf.sample
Modified: branches/1.4/channels/chan_iax2.c
URL: http://svn.digium.com/view/asterisk/branches/1.4/channels/chan_iax2.c?view=diff&rev=86371&r1=86370&r2=86371
==============================================================================
--- branches/1.4/channels/chan_iax2.c (original)
+++ branches/1.4/channels/chan_iax2.c Thu Oct 18 16:14:15 2007
@@ -141,6 +141,15 @@
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] = "";
@@ -375,6 +384,7 @@
unsigned char *trunkdata;
unsigned int trunkdatalen;
unsigned int trunkdataalloc;
+ int trunkmaxmtu;
struct iax2_trunk_peer *next;
int trunkerror;
int calls;
@@ -831,6 +841,7 @@
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);
@@ -2323,8 +2334,41 @@
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;
}
@@ -3813,6 +3857,8 @@
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;
@@ -3860,6 +3906,18 @@
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;
@@ -6295,6 +6353,7 @@
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);
}
@@ -9470,6 +9529,7 @@
int format;
int portno = IAX_DEFAULT_PORTNO;
int x;
+ int mtuv;
struct iax2_user *user;
struct iax2_peer *peer;
struct ast_netsock *ns;
@@ -9635,6 +9695,15 @@
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)
@@ -9832,6 +9901,7 @@
strcpy(language, "");
strcpy(mohinterpret, "default");
strcpy(mohsuggest, "");
+ global_max_trunk_mtu = MAX_TRUNK_MTU;
amaflags = 0;
delayreject = 0;
ast_clear_flag((&globalflags), IAX_NOTRANSFER);
@@ -9842,6 +9912,10 @@
set_config(config, 1);
prune_peers();
prune_users();
+
+ trunk_timed = trunk_untimed = 0;
+ trunk_nmaxmtu = trunk_maxmtu = 0;
+
AST_LIST_LOCK(®istrations);
AST_LIST_TRAVERSE(®istrations, reg, entry)
iax2_do_register(reg);
@@ -10342,6 +10416,13 @@
"Usage: iax2 show 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 show cache\n"
" Display currently cached IAX Dialplan results.\n";
@@ -10495,6 +10576,10 @@
{ { "iax2", "show", "threads", NULL },
iax2_show_threads, "Display IAX helper thread info",
show_threads_usage, NULL, },
+
+ { { "iax2", "set", "mtu", NULL },
+ iax2_set_mtu, "Set the IAX systemwide trunking MTU",
+ set_mtu_usage, NULL, NULL },
{ { "iax2", "show", "users", NULL },
iax2_show_users, "List defined IAX users",
Modified: branches/1.4/configs/iax.conf.sample
URL: http://svn.digium.com/view/asterisk/branches/1.4/configs/iax.conf.sample?view=diff&rev=86371&r1=86370&r2=86371
==============================================================================
--- branches/1.4/configs/iax.conf.sample (original)
+++ branches/1.4/configs/iax.conf.sample Thu Oct 18 16:14:15 2007
@@ -152,7 +152,16 @@
; 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
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