Don't allow masquerading into oneself (bug #3040)

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/v1-0@4788 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index a9692ade2713f0f8af837751870e14275a772b7c..61297b49b6fe393bb1bdc01605156657c5d187d1 100755 (executable)
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -5135,9 +5135,13 @@ static int get_refer_info(struct sip_pvt *p, struct sip_request *oreq)
                        p2 = p2->next;
                }
                ast_mutex_unlock(&iflock);
-               if (p->refer_call)
-                       return 0;
-               else
+               if (p->refer_call) {
+                       if (p->refer_call == p) {
+                               ast_log(LOG_NOTICE, "Supervised transfer attempted to transfer into same call id (%s == %s)!\n", tmp5, p->callid);
+                               p->refer_call = NULL;
+                       } else
+                               return 0;
+               } else
                        ast_log(LOG_NOTICE, "Supervised transfer requested, but unable to find callid '%s'\n", tmp5);
        } else if (ast_exists_extension(NULL, p->context, c, 1, NULL) || !strcmp(c, ast_parking_ext())) {
                /* This is an unsupervised transfer */