tree 87a615a223dba92de3e2b2690d32b1f4247c7414
parent 7ffa831f05474311ccdc0a2cfb12c5622723a7af
author Neels Hofmeyr <nhofmeyr@sysmocom.de> 1477006557 +0200
committer Neels Hofmeyr <nhofmeyr@sysmocom.de> 1489080858 +0100

mgcp: hack RAB success from nano3G: patch first RTP payload

The ip.access nano3G needs the first RTP payload's first two bytes to read hex
'e400', or it will reject the RAB assignment. Add flag
patched_first_rtp_payload to mgcp_rtp_state to detect the first RTP payload on
a stream, and overwrite its first bytes with e400. This should probably be
configurable, but seems to not harm other femto cells (as long as we patch only
the first RTP payload in each stream). Only do this when sending to the BTS
side.

Change-Id: If0887b0b7714fc204f2addab2d43d44bb283ba21