FreeCalypso > hg > themwi-system-sw

annotate libutil/imsi_entry.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 40e5097437fa
children
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40e5097437fa libutil: add grok_imsi_user_arg()
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1 /*
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2 * The library function implemented in this module supports IMSI entry
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3 * at UI level, either in the standard form (long string of digits)
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4 * or in the shorthand notation introduced in fc-sim-tools.
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5 */
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6
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7 #include <ctype.h>
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8 #include <string.h>
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9 #include <strings.h>
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10
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11 grok_imsi_user_arg(arg, dest)
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12 char *arg, *dest;
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13 {
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14 char *cp, *dp;
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15 int n, tail_len, remain;
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16
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17 if (!isdigit(*arg))
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18 return(-1);
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19 cp = arg;
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20 dp = dest;
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21 n = 0;
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22 while (isdigit(*cp)) {
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23 if (n >= 15)
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24 return(-1);
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25 *dp++ = *cp++;
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26 n++;
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27 }
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28 if (!*cp) {
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29 if (n < 6)
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30 return(-1);
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31 *dp = '\0';
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32 return(0);
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33 }
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34 if (*cp != '-')
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35 return(-1);
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36 cp++;
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37 tail_len = strlen(cp);
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38 if (!tail_len)
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39 return(-1);
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40 remain = 15 - n;
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41 if (remain < tail_len + 1)
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42 return(-1);
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43 while (remain > tail_len) {
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44 *dp++ = '0';
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45 remain--;
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46 }
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47 while (*cp) {
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48 if (!isdigit(*cp))
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49 return(-1);
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50 *dp++ = *cp++;
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51 }
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52 *dp = '\0';
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53 return(0);
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54 }