Which IP address has been sent to carrier in SDP offer? GLOBAL_IPv6 or
EXTERNAL_IPv4?
On Tuesday 24 February 2015 19:20:15 Anthony Messina wrote:
This is probably very likely a configuration issue on
my part, but I wanted
to check before reporting an RTPEngine bug...
Thank you for any pointers or suggestions.
This is a multi-homed server where
em1: INTERNAL_IPv4 & GLOBAL_IPv6
em2: EXTERNAL_IPv4
Note that below, the IPv6 address on my server is the same on priv and pub
and is reachable from "internal" and "external" endpoints. I have it
set
this way as I eventually want to use ICE and have it create the proper
IPv4/IPv6 candidates regardless of the RTPEngine --interface.
I'm running RTPEngine with the following:
/usr/sbin/rtpengine
--table=0
--interface=pub/EXTERNAL_IPv4
--interface=pub/GLOBAL_IPv6
--interface=priv/INTERNAL_IPv4
--interface=priv/GLOBAL_IPv6
--listen-ng=127.0.0.1:12221
--tos=184
--log-level=7
--pidfile=/run/rtpengine/rtpengine.test.pid
I'm trying to bridge an IPv4-initated call to an IPv6 carrier. The call
seems to flow properly until the carrier's SDP is passed through RTPEngine
on answer. The snippets are here, and I have attached the full log.
[TdBe4MJa1DC4teIllJkqq6U-PAw9Zh4y] Received command 'answer' from
127.0.0.1:38786
[TdBe4MJa1DC4teIllJkqq6U-PAw9Zh4y] Dump for 'answer' from 127.0.0.1:38786: {
"sdp": "v=0
o=FreeSWITCH 1424799070 1424799071 IN IP6 CARRIER_IPv6
s=FreeSWITCH
c=IN IP6 CARRIER_IPv6
t=0 0
m=audio 24308 RTP/AVP 0 101
a=rtpmap:0 PCMU/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
a=silenceSupp:off - - - -
a=ptime:20
a=rtcp:24309 IN IP6 CARRIER_IPv6
The CARRIER_IPv6 gets converted as follows with 0.0.0.0 in place of what
should be the address of my RTPEngine instance. Shouldn't it be returning
the IPv4 address of my RTPEngine instance (either priv or pub as called
from Kamailio)?
[TdBe4MJa1DC4teIllJkqq6U-PAw9Zh4y] Replying to 'answer' from 127.0.0.1:38786
[TdBe4MJa1DC4teIllJkqq6U-PAw9Zh4y] Response dump for 'answer' to
127.0.0.1:38786: { "sdp": "v=0
o=FreeSWITCH 1424799070 1424799071 IN IP4 0.0.0.0
s=FreeSWITCH
c=IN IP4 0.0.0.0
t=0 0
m=audio 38914 RTP/SAVP 0 101
a=rtpmap:0 PCMU/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
a=silenceSupp:off - - - -
a=ptime:20
a=sendrecv
a=rtcp:38915
a=crypto:1 AES_CM_128_HMAC_SHA1_80
inline:Jby5IPt4WlNySLd66eK+Mcky8yJeUwp7dWH7W3aO