FreeCalypso > hg > themwi-system-sw

annotate sip-in/call_setup.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 1bbe57df74f6
children
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62
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1 /*
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2 * In this module we implement incoming call setup toward GSM.
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3 */
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4
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5 #include <sys/types.h>
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6 #include <sys/socket.h>
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7 #include <sys/time.h>
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8 #include <netinet/in.h>
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9 #include <stdio.h>
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10 #include <stdint.h>
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11 #include <stdlib.h>
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12 #include <string.h>
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13 #include <strings.h>
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14 #include <syslog.h>
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15 #include "../include/mncc.h"
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16 #include "../include/gsm48_const.h"
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17 #include "call.h"
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18
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19 static void
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20 fill_calling_number(from, caller)
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21 char *from;
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22 struct gsm_mncc_number *caller;
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23 {
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24 char *num;
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25 int cc;
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26
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27 if (!strcasecmp(from, "Restricted")) {
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28 caller->present = GSM48_PRES_RESTR;
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29 return;
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30 }
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31 if (*from == '+')
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32 num = from + 1;
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33 else
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34 num = from;
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35 cc = grok_number_string(num, 0);
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36 if (cc < 1 || cc > 32) {
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37 /* not a valid number */
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38 caller->present = GSM48_PRES_UNAVAIL;
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39 return;
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40 }
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41 /* accept "From" user as a valid number */
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42 strcpy(caller->number, num);
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43 caller->plan = GSM48_NPI_ISDN_E164;
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44 if (*from == '+')
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45 caller->type = GSM48_TON_INTERNATIONAL;
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46 }
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47
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48 void
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49 proceed_with_call_setup(call)
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50 struct call *call;
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51 {
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52 struct gsm_mncc setup_msg;
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53
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54 allocate_mncc_callref(call);
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55 bzero(&setup_msg, sizeof setup_msg);
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56 setup_msg.msg_type = MNCC_SETUP_REQ;
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57 setup_msg.callref = call->mncc_callref;
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58 /* fill called number */
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59 setup_msg.called.type = GSM48_TON_INTERNATIONAL;
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60 setup_msg.called.plan = GSM48_NPI_ISDN_E164;
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61 setup_msg.called.number[0] = '1';
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62 strcpy(setup_msg.called.number+1, call->called_nanp);
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63 setup_msg.fields |= MNCC_F_CALLED;
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64 /* fill calling number */
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65 call->from_user[call->from_user_len] = '\0';
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66 fill_calling_number(call->from_user, &setup_msg.calling);
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67 call->from_user[call->from_user_len] = '@';
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68 setup_msg.fields |= MNCC_F_CALLING;
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69 send_mncc_to_gsm(&setup_msg, sizeof(struct gsm_mncc));
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70 call->overall_state = OVERALL_STATE_CALL_GSM;
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71 call->mncc_state = MNCC_STATE_STARTED;
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72 syslog(LOG_DEBUG, "Call in%06u mapped to socket callref 0x%x",
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73 call->in_tag_num, call->mncc_callref);
62
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74 }