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Allow Timer B to be set on the peer, and ensure SIP rules are followed (or warn) in comparison to Timer T1.

Browse Source 
(closes issue #16643)
 Reported by: nahuelgreco
 Patches: 
       20100204__issue16643.diff.txt uploaded by tilghman (license 14)
 Tested by: oej


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@246724 65c4cc65-6c06-0410-ace0-fbb531ad65f3
certified/1.8.6
Tilghman Lesher 16 years ago
parent 1ac0713811
commit b26b519159
1 changed files with 51 additions and 17 deletions
Show Stats Download Patch File Download Diff File

68
channels/chan_sip.c
Unescape View File

@ -2792,6 +2792,8 @@ static void sip_scheddestroy(struct sip_pvt *p, int ms)
if (ms < 0) {
if (p->timer_t1 == 0) {
p->timer_t1 = global_t1; /* Set timer T1 if not set (RFC 3261) */
}
if (p->timer_b == 0) {
p->timer_b = global_timer_b; /* Set timer B if not set (RFC 3261) */
}
ms = p->timer_t1 * 64;
@ -22948,6 +22950,7 @@ static struct sip_peer *build_peer(const char *name, struct ast_variable *v, str
int firstpass = 1;
uint16_t port = 0;
int format = 0; /* Ama flags */
int timerb_set = 0, timert1_set = 0;
time_t regseconds = 0;
struct ast_flags peerflags[2] = {{(0)}};
struct ast_flags mask[2] = {{(0)}};
@ -23240,26 +23243,17 @@ static struct sip_peer *build_peer(const char *name, struct ast_variable *v, str
peer->rtpkeepalive = global_rtpkeepalive;
}
} else if (!strcasecmp(v->name, "timert1")) {
if ((sscanf(v->value, "%30d", &peer->timer_t1) != 1) || (peer->timer_t1 < 0)) {
if ((sscanf(v->value, "%30d", &peer->timer_t1) != 1) || (peer->timer_t1 < 200) || (peer->timer_t1 < global_t1min)) {
ast_log(LOG_WARNING, "'%s' is not a valid T1 time at line %d. Using default.\n", v->value, v->lineno);
peer->timer_t1 = global_t1;
}
/* Note that Timer B is dependent upon T1 and MUST NOT be lower
* than T1 * 64, according to RFC 3261, Section 17.1.1.2 */
if (peer->timer_b < peer->timer_t1 * 64) {
peer->timer_b = peer->timer_t1 * 64;
peer->timer_t1 = global_t1min;
}
timert1_set = 1;
} else if (!strcasecmp(v->name, "timerb")) {
if ((sscanf(v->value, "%30d", &peer->timer_b) != 1) || (peer->timer_b < 0)) {
if ((sscanf(v->value, "%30d", &peer->timer_b) != 1) || (peer->timer_b < 200)) {
ast_log(LOG_WARNING, "'%s' is not a valid Timer B time at line %d. Using default.\n", v->value, v->lineno);
peer->timer_b = global_timer_b;
}
if (peer->timer_b < peer->timer_t1 * 64) {
static int warning = 0;
if (warning++ % 20 == 0) {
ast_log(LOG_WARNING, "Timer B has been set lower than recommended. (RFC 3261, 17.1.1.2)\n");
}
}
timerb_set = 1;
} else if (!strcasecmp(v->name, "setvar")) {
peer->chanvars = add_var(v->value, peer->chanvars);
} else if (!strcasecmp(v->name, "header")) {
@ -23372,6 +23366,23 @@ static struct sip_peer *build_peer(const char *name, struct ast_variable *v, str
}
}
/* Note that Timer B is dependent upon T1 and MUST NOT be lower
* than T1 * 64, according to RFC 3261, Section 17.1.1.2 */
if (peer->timer_b < peer->timer_t1 * 64) {
if (timerb_set && timert1_set) {
ast_log(LOG_WARNING, "Timer B has been set lower than recommended for peer %s (%d < 64 * Timer-T1=%d)\n", peer->name, peer->timer_b, peer->timer_t1);
} else if (timerb_set) {
if ((peer->timer_t1 = peer->timer_b / 64) < global_t1min) {
ast_log(LOG_WARNING, "Timer B has been set lower than recommended (%d < 64 * timert1=%d). (RFC 3261, 17.1.1.2)\n", peer->timer_b, peer->timer_t1);
peer->timer_t1 = global_t1min;
peer->timer_b = peer->timer_t1 * 64;
}
peer->timer_t1 = peer->timer_b / 64;
} else {
peer->timer_b = peer->timer_t1 * 64;
}
}
if (!peer->default_outbound_transport) {
/* Set default set of transports */
peer->transports = default_transports;
@ -23518,7 +23529,7 @@ static int reload_config(enum channelreloadreason reason)
struct ast_flags config_flags = { reason == CHANNEL_MODULE_LOAD ? 0 : ast_test_flag(&global_flags[1], SIP_PAGE2_RTCACHEFRIENDS) ? 0 : CONFIG_FLAG_FILEUNCHANGED };
int auto_sip_domains = FALSE;
struct sockaddr_in old_bindaddr = bindaddr;
int registry_count = 0, peer_count = 0;
int registry_count = 0, peer_count = 0, timerb_set = 0, timert1_set = 0;
time_t run_start, run_end;
run_start = time(0);
@ -23808,8 +23819,13 @@ static int reload_config(enum channelreloadreason reason)
* for the value to be set higher, though a lower value is only
* allowed on private networks unconnected to the Internet. */
global_t1 = atoi(v->value);
/* Note that timer B is dependent on the value of T1 */
global_timer_b = global_t1 * 64;
} else if (!strcasecmp(v->name, "timerb")) {
int tmp = atoi(v->value);
if (tmp < 500) {
global_timer_b = global_t1 * 64;
ast_log(LOG_WARNING, "Invalid value for timerb ('%s'). Setting to default ('%d').\n", v->value, global_timer_b);
}
timerb_set = 1;
} else if (!strcasecmp(v->name, "t1min")) {
global_t1min = atoi(v->value);
} else if (!strcasecmp(v->name, "transport") && !ast_strlen_zero(v->value)) {
@ -24187,6 +24203,24 @@ static int reload_config(enum channelreloadreason reason)
}
}
if (global_t1 < global_t1min) {
ast_log(LOG_WARNING, "'t1min' (%d) cannot be greater than 't1timer' (%d). Resetting 't1timer' to the value of 't1min'\n", global_t1min, global_t1);
global_t1 = global_t1min;
}
if (global_timer_b < global_t1 * 64) {
if (timerb_set && timert1_set) {
ast_log(LOG_WARNING, "Timer B has been set lower than recommended (%d < 64 * timert1=%d). (RFC 3261, 17.1.1.2)\n", global_timer_b, global_t1);
} else if (timerb_set) {
if ((global_t1 = global_timer_b / 64) < global_t1min) {
ast_log(LOG_WARNING, "Timer B has been set lower than recommended (%d < 64 * timert1=%d). (RFC 3261, 17.1.1.2)\n", global_timer_b, global_t1);
global_t1 = global_t1min;
global_timer_b = global_t1 * 64;
}
} else {
global_timer_b = global_t1 * 64;
}
}
if (!sip_cfg.allow_external_domains && AST_LIST_EMPTY(&domain_list)) {
ast_log(LOG_WARNING, "To disallow external domains, you need to configure local SIP domains.\n");
sip_cfg.allow_external_domains = 1;

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