On Sat, Mar 2, 2013 at 5:17 PM, Alex Balashov <abalashov at evaristesys.com>wrote:
Correct me if I'm wrong, but last time I looked, Linux's netfilter kernel module for SIP, ip_conntrack_sip, still is ignorant of SDP entirely.
I just checked the latest stable tree (git:// git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git) It does parse the SDP finding session/media description rtp/rtcp ports and it does mangle the UDP packet. See net/netfilter/nf_nat_sip.c, function process_sdp() Cheers, *Moises Silva **Manager, Software Engineering*** msilva at sangoma.com Sangoma Technologies 100 Renfrew Drive, Suite 100, Markham, ON L3R 9R6 Canada t. +1 800 388 2475 (N. America) t. +1 905 474 1990 x128 f. +1 905 474 9223 **<http://www.sangoma.com/contact?utm_source=signature&utm_medium=email&utm_cam...> Products<http://sangoma.com/products?utm_source=signature&utm_medium=email&utm_campai...> | Solutions<http://sangoma.com/solutions?utm_source=signature&utm_medium=email&utm_campa...> | Events<http://sangoma.com/about_us/events?utm_source=signature&utm_medium=email&utm...> | Contact<http://www.sangoma.com/contact?utm_source=signature&utm_medium=email&utm_cam...> | Wiki<http://wiki.sangoma.com/?utm_source=signature&utm_medium=email&utm_campaign=...> | Facebook<http://www.facebook.com/pages/Sangoma-VoIP-Cards/43578453335?utm_source=sign...> | Twitter<http://www.twitter.com/sangoma?utm_source=signature&utm_medium=email&utm_campaign=email%2Bsignatures>`| | YouTube<http://www.youtube.com/sangomatechnologies?utm_source=signature&utm_medium=e...>