Fix some bugs in process_message(). The manager session lock needs to be held

when sending some sort of response, or calling one of the manager action
callbacks.  This resolves an issue where people using the GUI would get random
crashes when they start clicking around a lot.
(issue #8711, reported and debugged by zandbelt)


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@51781 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/manager.c

@@ -1966,7 +1966,9 @@ static int process_message(struct mansession *s, const struct message *m)
 	ast_log( LOG_DEBUG, "Manager received command '%s'\n", action );
 
 	if (ast_strlen_zero(action)) {
+		ast_mutex_lock(&s->__lock);
 		astman_send_error(s, m, "Missing action in request");
+		ast_mutex_unlock(&s->__lock);
 		return 0;
 	}
 	if (!ast_strlen_zero(id)) {
@@ -1987,13 +1989,17 @@ static int process_message(struct mansession *s, const struct message *m)
 				ast_mutex_unlock(&s->__lock);
 				return 0;
 			} else {
+				ast_mutex_lock(&s->__lock);
 				astman_send_error(s, m, "Must specify AuthType");
+				ast_mutex_unlock(&s->__lock);
 				return 0;
 			}
 		} else if (!strcasecmp(action, "Login")) {
 			if (authenticate(s, m)) {
 				sleep(1);
+				ast_mutex_lock(&s->__lock);
 				astman_send_error(s, m, "Authentication failed");
+				ast_mutex_unlock(&s->__lock);
 				return -1;
 			} else {
 				s->authenticated = 1;
@@ -2003,10 +2009,14 @@ static int process_message(struct mansession *s, const struct message *m)
 					}
 				}
 				ast_log(LOG_EVENT, "%sManager '%s' logged on from %s\n", (s->sessiontimeout ? "HTTP " : ""), s->username, ast_inet_ntoa(s->sin.sin_addr));
+				ast_mutex_lock(&s->__lock);
 				astman_send_ack(s, m, "Authentication accepted");
+				ast_mutex_unlock(&s->__lock);
 			}
 		} else if (!strcasecmp(action, "Logoff")) {
+			ast_mutex_lock(&s->__lock);
 			astman_send_ack(s, m, "See ya");
+			ast_mutex_unlock(&s->__lock);
 			return -1;
 		} else
 			astman_send_error(s, m, "Authentication Required");
@@ -2015,11 +2025,13 @@ static int process_message(struct mansession *s, const struct message *m)
 		for (tmp = first_action; tmp; tmp = tmp->next) { 		
 			if (strcasecmp(action, tmp->action))
 				continue;
+			ast_mutex_lock(&s->__lock);
 			if ((s->writeperm & tmp->authority) == tmp->authority) {
 				if (tmp->func(s, m))
 					ret = -1;
 			} else
 				astman_send_error(s, m, "Permission denied");
+			ast_mutex_unlock(&s->__lock);
 			break;
 		}
 		ast_mutex_unlock(&actionlock);