Fix the problem of notification of a device state change to a device with a '-'

in the name.  Could probably do with a better fix in trunk, but this bug has
been open way too long without a better solution.
Reported by: stevedavies
Patch by: tilghman
(Closes issue #9668)


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@96575 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/devicestate.c

@@ -294,7 +294,7 @@ static void do_state_change(const char *device)
 	ast_hint_state_changed(device);
 }
 
-static int __ast_device_state_changed_literal(char *buf)
+static int __ast_device_state_changed_literal(char *buf, int norecurse)
 {
 	char *device;
 	struct state_change *change;
@@ -305,10 +305,6 @@ static int __ast_device_state_changed_literal(char *buf)
 
 	device = buf;
 	
-	tmp = strrchr(device, '-');
-	if (tmp)
-		*tmp = '\0';
-	
 	if (change_thread == AST_PTHREADT_NULL || !(change = ast_calloc(1, sizeof(*change) + strlen(device)))) {
 		/* we could not allocate a change struct, or */
 		/* there is no background thread, so process the change now */
@@ -324,6 +320,18 @@ static int __ast_device_state_changed_literal(char *buf)
 		AST_LIST_UNLOCK(&state_changes);
 	}
 
+	/* The problem with this API is that a device may be called with the unique
+	 * identifier appended or not, but it's separated from the channel name
+	 * with a '-', which is also a legitimate character in a channel name.  So,
+	 * we have to force both names to get their names checked for state changes
+	 * to ensure that the right one gets notified.  Not a huge performance hit,
+	 * but it might could be fixed by an enterprising programmer in trunk.
+	 */
+	if (!norecurse && (tmp = strrchr(device, '-'))) {
+		*tmp = '\0';
+		__ast_device_state_changed_literal(tmp, 1);
+	}
+	
 	return 1;
 }
 
@@ -331,7 +339,7 @@ int ast_device_state_changed_literal(const char *dev)
 {
 	char *buf;
 	buf = ast_strdupa(dev);
-	return __ast_device_state_changed_literal(buf);
+	return __ast_device_state_changed_literal(buf, 0);
 }
 
 /*! \brief Accept change notification, add it to change queue */
@@ -343,7 +351,7 @@ int ast_device_state_changed(const char *fmt, ...)
 	va_start(ap, fmt);
 	vsnprintf(buf, sizeof(buf), fmt, ap);
 	va_end(ap);
-	return __ast_device_state_changed_literal(buf);
+	return __ast_device_state_changed_literal(buf, 0);
 }
 
 /*! \brief Go through the dev state change queue and update changes in the dev state thread */