since we integrated IPv6 into our existing routing logic, in some cases "fix_nated_sdp" gets called for IPv6 calls, too. (Actually, this just happens because of the mistakenly detected NAT.) But that ends up with a an error in the log.

ERROR: nathelper [nathelper.c:1685]: replace_sdp_ip(): not an IPv4 address in 'c=' SDP

So I'm looking for a way to exempt IPv6 calls from that. But I can't find a pseudovariable which carries the SDP contact IP. I guess I could take some function from the sdpops module, but is there a more convenient way to get just the contact IP?