[asterisk-commits] rmudgett: branch 1.4 r210575 - /branches/1.4/channels/chan_dahdi.c
SVN commits to the Asterisk project
asterisk-commits at lists.digium.com
Wed Aug 5 14:19:01 CDT 2009
Author: rmudgett
Date: Wed Aug 5 14:18:56 2009
New Revision: 210575
URL: http://svn.asterisk.org/svn-view/asterisk?view=rev&rev=210575
Log:
Dialplan starts execution before the channel setup is complete.
* Issue 15655: For the case where dialing is complete for an incoming
call, dahdi_new() was asked to start the PBX and then the code set more
channel variables. If the dialplan hungup before these channel variables
got set, asterisk would likely crash.
* Fixed potential for overlap incoming call to erroneously set channel
variables as global dialplan variables if the ast_channel structure failed
to get allocated.
* Added missing set of CALLINGSUBADDR in the dialing is complete case.
(closes issue #15655)
Reported by: alecdavis
Modified:
branches/1.4/channels/chan_dahdi.c
Modified: branches/1.4/channels/chan_dahdi.c
URL: http://svn.asterisk.org/svn-view/asterisk/branches/1.4/channels/chan_dahdi.c?view=diff&rev=210575&r1=210574&r2=210575
==============================================================================
--- branches/1.4/channels/chan_dahdi.c (original)
+++ branches/1.4/channels/chan_dahdi.c Wed Aug 5 14:18:56 2009
@@ -9336,6 +9336,7 @@
pri->pvts[chanpos]->exten[0] = 's';
pri->pvts[chanpos]->exten[1] = '\0';
}
+
/* Make sure extension exists (or in overlap dial mode, can exist) */
if (((pri->overlapdial & DAHDI_OVERLAPDIAL_INCOMING) && ast_canmatch_extension(NULL, pri->pvts[chanpos]->context, pri->pvts[chanpos]->exten, 1, pri->pvts[chanpos]->cid_num)) ||
ast_exists_extension(NULL, pri->pvts[chanpos]->context, pri->pvts[chanpos]->exten, 1, pri->pvts[chanpos]->cid_num)) {
@@ -9371,8 +9372,13 @@
pri->pvts[chanpos]->callingpres = e->ring.callingpres;
/* Start PBX */
- if (!e->ring.complete && (pri->overlapdial & DAHDI_OVERLAPDIAL_INCOMING) && ast_matchmore_extension(NULL, pri->pvts[chanpos]->context, pri->pvts[chanpos]->exten, 1, pri->pvts[chanpos]->cid_num)) {
- /* Release the PRI lock while we create the channel */
+ if (!e->ring.complete
+ && (pri->overlapdial & DAHDI_OVERLAPDIAL_INCOMING)
+ && ast_matchmore_extension(NULL, pri->pvts[chanpos]->context, pri->pvts[chanpos]->exten, 1, pri->pvts[chanpos]->cid_num)) {
+ /*
+ * Release the PRI lock while we create the channel
+ * so other threads can send D channel messages.
+ */
ast_mutex_unlock(&pri->lock);
if (crv) {
/* Set bearer and such */
@@ -9383,30 +9389,27 @@
} else {
c = dahdi_new(pri->pvts[chanpos], AST_STATE_RESERVED, 0, SUB_REAL, law, e->ring.ctype);
}
-
- ast_mutex_unlock(&pri->pvts[chanpos]->lock);
-
- if (!ast_strlen_zero(e->ring.callingsubaddr)) {
- pbx_builtin_setvar_helper(c, "CALLINGSUBADDR", e->ring.callingsubaddr);
+ ast_mutex_lock(&pri->lock);
+ if (c) {
+ if (!ast_strlen_zero(e->ring.callingsubaddr)) {
+ pbx_builtin_setvar_helper(c, "CALLINGSUBADDR", e->ring.callingsubaddr);
+ }
+ if (e->ring.ani2 >= 0) {
+ snprintf(ani2str, sizeof(ani2str), "%d", e->ring.ani2);
+ pbx_builtin_setvar_helper(c, "ANI2", ani2str);
+ }
+
+#ifdef SUPPORT_USERUSER
+ if (!ast_strlen_zero(e->ring.useruserinfo)) {
+ pbx_builtin_setvar_helper(c, "USERUSERINFO", e->ring.useruserinfo);
+ }
+#endif
+
+ snprintf(calledtonstr, sizeof(calledtonstr), "%d", e->ring.calledplan);
+ pbx_builtin_setvar_helper(c, "CALLEDTON", calledtonstr);
+ if (e->ring.redirectingreason >= 0)
+ pbx_builtin_setvar_helper(c, "PRIREDIRECTREASON", redirectingreason2str(e->ring.redirectingreason));
}
- if (e->ring.ani2 >= 0) {
- snprintf(ani2str, 5, "%.2d", e->ring.ani2);
- pbx_builtin_setvar_helper(c, "ANI2", ani2str);
- }
-
-#ifdef SUPPORT_USERUSER
- if (!ast_strlen_zero(e->ring.useruserinfo)) {
- pbx_builtin_setvar_helper(c, "USERUSERINFO", e->ring.useruserinfo);
- }
-#endif
-
- snprintf(calledtonstr, sizeof(calledtonstr)-1, "%d", e->ring.calledplan);
- pbx_builtin_setvar_helper(c, "CALLEDTON", calledtonstr);
- if (e->ring.redirectingreason >= 0)
- pbx_builtin_setvar_helper(c, "PRIREDIRECTREASON", redirectingreason2str(e->ring.redirectingreason));
-
- ast_mutex_lock(&pri->pvts[chanpos]->lock);
- ast_mutex_lock(&pri->lock);
pthread_attr_init(&attr);
pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
@@ -9416,7 +9419,7 @@
plancallingnum, S_OR(pri->pvts[chanpos]->exten, "<unspecified>"),
pri->pvts[chanpos]->logicalspan, pri->pvts[chanpos]->prioffset, pri->span);
} else {
- ast_log(LOG_WARNING, "Unable to start PBX on channel %d/%d, span %d\n",
+ ast_log(LOG_WARNING, "Unable to start PBX on channel %d/%d, span %d\n",
pri->pvts[chanpos]->logicalspan, pri->pvts[chanpos]->prioffset, pri->span);
if (c)
ast_hangup(c);
@@ -9426,17 +9429,28 @@
}
}
pthread_attr_destroy(&attr);
- } else {
+ } else {
+ /*
+ * Release the PRI lock while we create the channel
+ * so other threads can send D channel messages.
+ */
ast_mutex_unlock(&pri->lock);
- /* Release PRI lock while we create the channel */
- c = dahdi_new(pri->pvts[chanpos], AST_STATE_RING, 1, SUB_REAL, law, e->ring.ctype);
+ c = dahdi_new(pri->pvts[chanpos], AST_STATE_RING, 0, SUB_REAL, law, e->ring.ctype);
+ ast_mutex_lock(&pri->lock);
if (c) {
- char calledtonstr[10];
-
- ast_mutex_unlock(&pri->pvts[chanpos]->lock);
-
+ /*
+ * It is reasonably safe to set the following
+ * channel variables while the PRI and DAHDI private
+ * structures are locked. The PBX has not been
+ * started yet and it is unlikely that any other task
+ * will do anything with the channel we have just
+ * created.
+ */
+ if (!ast_strlen_zero(e->ring.callingsubaddr)) {
+ pbx_builtin_setvar_helper(c, "CALLINGSUBADDR", e->ring.callingsubaddr);
+ }
if (e->ring.ani2 >= 0) {
- snprintf(ani2str, 5, "%d", e->ring.ani2);
+ snprintf(ani2str, sizeof(ani2str), "%d", e->ring.ani2);
pbx_builtin_setvar_helper(c, "ANI2", ani2str);
}
@@ -9448,26 +9462,26 @@
if (e->ring.redirectingreason >= 0)
pbx_builtin_setvar_helper(c, "PRIREDIRECTREASON", redirectingreason2str(e->ring.redirectingreason));
-
- snprintf(calledtonstr, sizeof(calledtonstr)-1, "%d", e->ring.calledplan);
+
+ snprintf(calledtonstr, sizeof(calledtonstr), "%d", e->ring.calledplan);
pbx_builtin_setvar_helper(c, "CALLEDTON", calledtonstr);
-
- ast_mutex_lock(&pri->pvts[chanpos]->lock);
- ast_mutex_lock(&pri->lock);
-
+ }
+ if (c && !ast_pbx_start(c)) {
if (option_verbose > 2)
ast_verbose(VERBOSE_PREFIX_3 "Accepting call from '%s' to '%s' on channel %d/%d, span %d\n",
- plancallingnum, pri->pvts[chanpos]->exten,
- pri->pvts[chanpos]->logicalspan, pri->pvts[chanpos]->prioffset, pri->span);
+ plancallingnum, pri->pvts[chanpos]->exten,
+ pri->pvts[chanpos]->logicalspan, pri->pvts[chanpos]->prioffset, pri->span);
+
dahdi_enable_ec(pri->pvts[chanpos]);
} else {
-
- ast_mutex_lock(&pri->lock);
-
- ast_log(LOG_WARNING, "Unable to start PBX on channel %d/%d, span %d\n",
+ ast_log(LOG_WARNING, "Unable to start PBX on channel %d/%d, span %d\n",
pri->pvts[chanpos]->logicalspan, pri->pvts[chanpos]->prioffset, pri->span);
- pri_hangup(pri->pri, e->ring.call, PRI_CAUSE_SWITCH_CONGESTION);
- pri->pvts[chanpos]->call = NULL;
+ if (c) {
+ ast_hangup(c);
+ } else {
+ pri_hangup(pri->pri, e->ring.call, PRI_CAUSE_SWITCH_CONGESTION);
+ pri->pvts[chanpos]->call = NULL;
+ }
}
}
} else {
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