diff options
| -rw-r--r-- | channels/chan_sip.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/channels/chan_sip.c b/channels/chan_sip.c index 87d6f34df..cf5a4dc87 100644 --- a/channels/chan_sip.c +++ b/channels/chan_sip.c @@ -10386,7 +10386,15 @@ static int get_refer_info(struct sip_pvt *transferer, struct sip_request *outgoi *to = '\0'; ast_copy_string(referdata->replaces_callid_fromtag, ptr, sizeof(referdata->replaces_callid_fromtag)); } - + + if (!strcmp(referdata->replaces_callid, transferer->callid) && + (!pedanticsipchecking || + (!strcmp(referdata->replaces_callid_fromtag, transferer->tag) && + !strcmp(referdata->replaces_callid_totag, transferer->theirtag)))) { + ast_log(LOG_WARNING, "Got an attempt to replace own Call-ID on %s\n", transferer->callid); + return -4; + } + if (option_debug > 1) { if (!pedanticsipchecking) ast_log(LOG_DEBUG,"Attended transfer: Will use Replace-Call-ID : %s (No check of from/to tags)\n", referdata->replaces_callid ); |