FreeCalypso > hg > themwi-system-sw

annotate libutil/dtmf_valid.c @ 124:7e04d28fae8b

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sip-in: default use-100rel to no BulkVS servers act badly when we send a reliable 180 Ringing response to an incoming call, even though they advertise 100rel support in the Supported header in the INVITE packet, and we probably won't be implementing 100rel for outbound because doing per-the-spec PRACK as a UAC is just too burdensome. Therefore, we need to consider 100rel extension as not-really-supported in themwi-system-sw.
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 01 Oct 2022 15:54:50 -0800
parents 64b9f0f90726
children
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64b9f0f90726 themwi-test-mtc: handle DTMF from MS
Mychaela Falconia <falcon@freecalypso.org>
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1 /*
64b9f0f90726 themwi-test-mtc: handle DTMF from MS
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2 * Here we implement a function that validates DTMF digits which arrive
64b9f0f90726 themwi-test-mtc: handle DTMF from MS
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3 * from GSM MS via MNCC_START_DTMF_IND.
64b9f0f90726 themwi-test-mtc: handle DTMF from MS
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4 */
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5
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6 is_valid_dtmf_digit(c)
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7 {
64b9f0f90726 themwi-test-mtc: handle DTMF from MS
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8 switch (c) {
64b9f0f90726 themwi-test-mtc: handle DTMF from MS
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9 case '0':
64b9f0f90726 themwi-test-mtc: handle DTMF from MS
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10 case '1':
64b9f0f90726 themwi-test-mtc: handle DTMF from MS
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11 case '2':
64b9f0f90726 themwi-test-mtc: handle DTMF from MS
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12 case '3':
64b9f0f90726 themwi-test-mtc: handle DTMF from MS
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13 case '4':
64b9f0f90726 themwi-test-mtc: handle DTMF from MS
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14 case '5':
64b9f0f90726 themwi-test-mtc: handle DTMF from MS
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15 case '6':
64b9f0f90726 themwi-test-mtc: handle DTMF from MS
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16 case '7':
64b9f0f90726 themwi-test-mtc: handle DTMF from MS
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17 case '8':
64b9f0f90726 themwi-test-mtc: handle DTMF from MS
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18 case '9':
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19 case '*':
64b9f0f90726 themwi-test-mtc: handle DTMF from MS
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20 case '#':
64b9f0f90726 themwi-test-mtc: handle DTMF from MS
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21 case 'A':
64b9f0f90726 themwi-test-mtc: handle DTMF from MS
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22 case 'B':
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23 case 'C':
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24 case 'D':
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25 return(1);
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26 default:
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27 return(0);
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28 }
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29 }