Question #276107 on rohc changed: https://answers.launchpad.net/rohc/+question/276107
Didier Barvaux posted a new comment: Hello, > And at SIP BYE message sometimes if endpoint couldn't sent > BYE message or a packet loss happens then that stream would > be orphan and related CID will be still be occupied. At that > point any idea to close the stream or CID ? You may either do nothing (context recycling will happen until all contexts are used, as now), or either implement some inactivity timeout. N seconds without RTP packets will make the application consider that the stream was interrupted without SIP BYE. The timeout mechanism may work alone, without the DPI mechanism. It is simpler and it should reach almost the same behavior. DPI detects the end of RTP streams quicker, but with a small inactivity timeout there is almost no difference. Because of the simplicity, it is worth a try! > Does /proc/sys/net/ipv4/netfilter/ip_conntrack_udp_timeout_stream has > anything to do at that point ? This file controls the inactivity timeout for UDP streams in the firewall/NAT rules handled by iptables/netfilter. There is no direct link with the ROHC library. You may however use netfilter connection tracking (conntrack) to detect inactivity among UDP streams. It would avoid to re-implement the stream identification/tracking in the IP/ROHC app. The netfilter conntrack mechanism can warn the IP/ROHC app when a stream ends. The libnetfilter_conntrack library provides functions to do that: * main page: https://www.netfilter.org/projects/libnetfilter_conntrack/index.html * API documentation: http://www.netfilter.org/projects/libnetfilter_conntrack/doxygen/modules.html * example printing creation/deletion of conntrack entries: https://git.netfilter.org/libnetfilter_conntrack/tree/examples/nfct-mnl-event.c Regards, Didier -- You received this question notification because your team ROHC Team is an answer contact for rohc. _______________________________________________ Mailing list: https://launchpad.net/~rohc Post to : [email protected] Unsubscribe : https://launchpad.net/~rohc More help : https://help.launchpad.net/ListHelp
