FreeCalypso > hg > themwi-system-sw
view libutil/dtmf_valid.c @ 165:9419fe55824f
themwi-sip-out complete to the point of compiling and linking
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Wed, 12 Oct 2022 17:05:45 -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); } }