diff options
| -rw-r--r-- | channels/chan_sip.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/channels/chan_sip.c b/channels/chan_sip.c index c7b39b8b6..0e3efaeb8 100644 --- a/channels/chan_sip.c +++ b/channels/chan_sip.c @@ -265,6 +265,7 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$") #include "asterisk/data.h" #include "asterisk/aoc.h" #include "asterisk/message.h" +#include "asterisk/pval.h" #include "sip/include/sip.h" #include "sip/include/globals.h" #include "sip/include/config_parser.h" @@ -5314,6 +5315,12 @@ static int create_addr(struct sip_pvt *dialog, const char *opeer, struct ast_soc dialog->relatedpeer = sip_ref_peer(peer, "create_addr: setting dialog's relatedpeer pointer"); sip_unref_peer(peer, "create_addr: unref peer from sip_find_peer hashtab lookup"); return res; + } else if (is_int(peername)) { + /* Although an IPv4 hostname *could* be represented as a 32-bit integer, it is uncommon and + * it makes dialing SIP/${EXTEN} for a peer that isn't defined resolve to an IP that is + * almost certainly not intended. It is much better to just reject purely numeric hostnames */ + ast_log(LOG_WARNING, "Purely numeric hostname (%s), and not a peer--rejecting!\n", peername); + return -1; } else { dialog->rtptimeout = global_rtptimeout; dialog->rtpholdtimeout = global_rtpholdtimeout; @@ -5355,6 +5362,7 @@ static int create_addr(struct sip_pvt *dialog, const char *opeer, struct ast_soc if (ast_sockaddr_resolve_first(&dialog->sa, hostn, 0)) { ast_log(LOG_WARNING, "No such host: %s\n", peername); + return -1; } if (srv_ret > 0) { |