[Linphone-developers] Failed to parse SDP message. What about more permissive mode for parsing SDP?

[kupchanko]

Hello,
when Sippy SoftSwitch is sending SIP INVITE to linphone (android), it’s 
rejected with the reason 'Failed to parse SDP message'.
I found advices for similar issue in this maillist:
rtcp_xr_enabled=0
rtcp_xr_rcvr_rtt_mode=all
rtcp_xr_rcvr_rtt_max_size=10000
rtcp_xr_stat_summary_enabled=0
rtcp_xr_voip_metrics_enabled=0
but it’s not working.

BTW, here is log:
session_description parser error for [v=0
o=- 2463217870 2463217870 IN IP4 xxx.yyy.zzz.www
s=CounterPath eyeBeam 1.5
c=IN IP4 xxx.yyy.zzz.www
t=0 0
m=audio 31612 RTP/AVP 18 101
a=alt:1 1 : e2br+9PL Eu1qGlQ9 10.211.55.3 8988
a=fmtp:18 annexb=yes
a=fmtp:101 0-15
a=rtpmap:18 G729/8000
a=rtpmap:101 telephone-event/8000
a=sendrecv
a=direction:active
]
Failed to parse SDP message.

I suggest the problem is in line
a=alt:1 1 : e2br+9PL Eu1qGlQ9 10.211.55.3 8988
where we have colon with spaces before and after.
Can someone confirm, that the issue is really with that colon?

Is it possible to make SDP parsing more permissive?

Thank you.

—
Regards, Andrii Kupchanko