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This ticket introduces pj_enum_ip_interface2() with additional option to omit deprecated IPv6 addresses, however currently it is only implemented for Linux. This ticket also modify behavior of STUN socket in enumerating local IPv6 addresses, it now skips deprecated IPv6 addresses.

Contribution from Sébastien Blin, thanks.

Reported that sending SIP messages to IPv4 literal addresses may have delay about 10s on Android platform. And investigation leads to changes in ticket #2198.

After some discussions, we decided to revert back the changes as some the conditions to allow such actions in the changes actually cannot be verified, i.e: currently in PJSIP level, there is no way to know that it is on NAT64 environment and transport is not bound to IPv4.

Thanks Ryan Wallach for the report and analysis.

When inserting a frame to JB, the stream assigns index for the frame using this kind of formula (not exactly): RTP-timestamp/ptime, so when ptime is increasing (i.e: doubled from 20ms to 40ms), frame indexes suddenly get much smaller (about half), and JB will see it as "sequence restart" (note that if the index difference is less than 100, JB will see it just as late frame). So basically the stream formula does not work well with ptime change, and modifying that behavior seems to be quite a major change. So resetting jitter buffer should be practical workaround. Note that actually the stream also resets the JB when seeing G722/MPEG timestamp span change.

Thanks Marcus Froeschl for the report.