FreeCalypso > hg > themwi-system-sw
view libutil/dtmf_valid.c @ 199:e6c7ced3c031
mgw: accept zero-length RTP payload as BFI
Mainline OsmoBTS now has an option (rtp continuous-streaming)
that causes it to emit an RTP packet every 20 ms without gaps,
sending a BFI marker in the form of zero-length RTP payload
when it has nothing else to send. These codec-independent
BFI markers don't indicate TAF, but this provision is a good
start. Accept this BFI packet format in themwi-mgw.
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Wed, 29 Mar 2023 20:23:43 -0800 |
parents | 64b9f0f90726 |
children |
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/* * Here we implement a function that validates DTMF digits which arrive * from GSM MS via MNCC_START_DTMF_IND. */ is_valid_dtmf_digit(c) { switch (c) { case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': case '*': case '#': case 'A': case 'B': case 'C': case 'D': return(1); default: return(0); } }