FreeCalypso > hg > themwi-system-sw

annotate mncc/call_setup.c @ 27:c6572f4c31d2

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themwi-mncc: fix bug in forwarding from call socket to GSM
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 28 Jun 2022 19:21:51 -0800
parents ccc5ab6d8388
children 660126bd5f59
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15
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1 /*
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2 * In this module we implement setup of new calls: either new MO calls
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3 * coming from GSM or new MT calls coming from a ThemWi call socket.
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4 */
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5
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6 #include <sys/types.h>
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7 #include <sys/socket.h>
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8 #include <stdio.h>
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9 #include <stdint.h>
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10 #include <stdlib.h>
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11 #include <string.h>
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12 #include <strings.h>
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13 #include <syslog.h>
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14 #include "../include/mncc.h"
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15 #include "../include/gsm48_const.h"
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16 #include "struct.h"
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17 #include "gsm_call.h"
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18
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19 preen_msc_provided_number(nums)
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20 struct gsm_mncc_number *nums;
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21 {
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22 int len;
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23
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24 len = grok_number_string(nums->number, 0);
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25 switch (len) {
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26 case 4:
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27 nums->type = GSM48_TON_NET_SPEC;
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28 nums->plan = GSM48_NPI_PRIVATE;
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29 break;
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30 case 11:
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31 if (nums->number[0] != '1')
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32 return(0);
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33 nums->type = GSM48_TON_INTERNATIONAL;
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34 nums->plan = GSM48_NPI_ISDN_E164;
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35 break;
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36 default:
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37 return(0);
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38 }
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39 nums->screen = GSM48_SCRN_NETWORK;
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40 return(1);
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41 }
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42
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43 void
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44 reject_mo_call(callref, cause_loc, cause_val)
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45 uint32_t callref;
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46 {
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47 struct gsm_mncc msg;
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48
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49 bzero(&msg, sizeof(struct gsm_mncc));
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50 msg.msg_type = MNCC_REJ_REQ;
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51 msg.callref = callref;
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52 mncc_set_cause(&msg, cause_loc, cause_val);
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53 send_mncc_to_gsm(&msg, sizeof(struct gsm_mncc));
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54 }
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55
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56 void
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57 process_mo_call_setup(msg)
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58 struct gsm_mncc *msg;
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59 {
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60 struct gsm_call *call;
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61 char nanp[11];
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62 int res, is_nanp, is_itn, is_local;
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63
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64 if (preen_msc_provided_number(&msg->calling))
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65 msg->fields |= MNCC_F_CALLING;
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66 else
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67 msg->fields &= ~MNCC_F_CALLING;
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68 if (!(msg->fields & MNCC_F_CALLED)) {
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69 reject_mo_call(msg->callref, GSM48_CAUSE_LOC_PRN_S_LU,
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70 GSM48_CC_CAUSE_INVAL_MAND_INF);
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71 return;
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72 }
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73 call = create_gsm_call(msg->callref);
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74 if (!call) {
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75 reject_mo_call(msg->callref, GSM48_CAUSE_LOC_PRN_S_LU,
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76 GSM48_CC_CAUSE_RESOURCE_UNAVAIL);
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77 return;
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78 }
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79 /* route based on destination address */
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80 refresh_number_db();
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81 is_nanp = is_itn = 0;
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82 switch (grok_number_string(msg->called.number, 0)) {
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83 case 4:
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84 if (msg->called.type != GSM48_TON_UNKNOWN &&
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85 msg->called.type != GSM48_TON_NET_SPEC &&
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86 msg->called.type != GSM48_TON_SHORT_CODE)
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87 break;
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88 if (msg->called.plan != GSM48_NPI_UNKNOWN &&
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89 msg->called.plan != GSM48_NPI_ISDN_E164 &&
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90 msg->called.plan != GSM48_NPI_PRIVATE)
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91 break;
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92 res = lookup_short_dial_number(msg->called.number, nanp);
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93 if (!res) {
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94 reject_mo_call(msg->callref, GSM48_CAUSE_LOC_PRN_S_LU,
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95 GSM48_CC_CAUSE_UNASSIGNED_NR);
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96 call->gc_flag = 1;
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97 return;
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98 }
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99 if (nanp[0]) {
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100 is_nanp = 1;
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101 msg->called.type = GSM48_TON_INTERNATIONAL;
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102 msg->called.plan = GSM48_NPI_ISDN_E164;
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103 msg->called.number[0] = '1';
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104 strcpy(msg->called.number+1, nanp);
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105 } else {
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106 is_itn = 1;
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107 msg->called.type = GSM48_TON_NET_SPEC;
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108 msg->called.plan = GSM48_NPI_PRIVATE;
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109 }
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110 break;
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111 case 10:
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112 if (msg->called.type != GSM48_TON_UNKNOWN &&
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113 msg->called.type != GSM48_TON_NATIONAL)
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114 break;
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115 if (msg->called.plan != GSM48_NPI_UNKNOWN &&
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116 msg->called.plan != GSM48_NPI_ISDN_E164 &&
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117 msg->called.plan != GSM48_NPI_NATIONAL)
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118 break;
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119 if (!is_nanp_valid_prefix(msg->called.number)) {
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120 reject_mo_call(msg->callref, GSM48_CAUSE_LOC_PRN_S_LU,
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121 GSM48_CC_CAUSE_INV_NR_FORMAT);
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122 call->gc_flag = 1;
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123 return;
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124 }
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125 is_nanp = 1;
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126 /* canonicalize to international format */
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
127 bcopy(msg->called.number, msg->called.number+1, 11);
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
128 msg->called.number[0] = '1';
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
129 msg->called.type = GSM48_TON_INTERNATIONAL;
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
130 msg->called.plan = GSM48_NPI_ISDN_E164;
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
131 break;
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
132 case 11:
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
133 if (msg->called.type != GSM48_TON_UNKNOWN &&
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
134 msg->called.type != GSM48_TON_INTERNATIONAL)
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
135 break;
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
136 if (msg->called.plan != GSM48_NPI_UNKNOWN &&
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
137 msg->called.plan != GSM48_NPI_ISDN_E164)
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
138 break;
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
139 if (msg->called.number[0] != '1')
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
140 break;
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
141 if (!is_nanp_valid_prefix(msg->called.number+1)) {
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
142 reject_mo_call(msg->callref, GSM48_CAUSE_LOC_PRN_S_LU,
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
143 GSM48_CC_CAUSE_INV_NR_FORMAT);
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
144 call->gc_flag = 1;
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
145 return;
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
146 }
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
147 is_nanp = 1;
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
148 /* canonicalize to international format */
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
149 msg->called.type = GSM48_TON_INTERNATIONAL;
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
150 msg->called.plan = GSM48_NPI_ISDN_E164;
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
151 break;
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
152 }
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
153 is_local = is_itn;
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
154 if (is_nanp && is_nanp_locally_owned(msg->called.number+1))
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
155 is_local = 1;
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
156 /* weed out attempts to call yourself */
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
157 if (is_local && !strcmp(msg->calling.number, msg->called.number)) {
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
158 reject_mo_call(msg->callref, GSM48_CAUSE_LOC_PRN_S_LU,
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
159 GSM48_CC_CAUSE_INCOMPAT_DEST);
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
160 call->gc_flag = 1;
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
161 return;
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
162 }
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
163 /* actually route the call */
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
164 if (is_local) {
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
165 internal_switch_mo_setup(call, msg);
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
166 return;
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
167 }
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
168 /* outbound calls remain to be implemented */
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
169 reject_mo_call(msg->callref, GSM48_CAUSE_LOC_PRN_S_LU,
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
170 GSM48_CC_CAUSE_NO_ROUTE);
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
171 call->gc_flag = 1;
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
172 }
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
173
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
174 static void
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
175 reject_mt_call(conn, callref, cause_loc, cause_val)
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
176 struct socket_conn *conn;
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
177 uint32_t callref;
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
178 {
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
179 struct gsm_mncc msg;
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
180
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
181 bzero(&msg, sizeof(struct gsm_mncc));
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
182 msg.msg_type = MNCC_REJ_REQ;
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
183 msg.callref = callref;
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
184 mncc_set_cause(&msg, cause_loc, cause_val);
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
185 mncc_signal_to_socket_nocall(conn, &msg);
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
186 }
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
187
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
188 void
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
189 process_ext_mtcall_setup(conn, msg)
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
190 struct socket_conn *conn;
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
191 struct gsm_mncc *msg;
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
192 {
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
193 struct gsm_call *call;
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
194
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
195 if (!(msg->fields & MNCC_F_CALLED) && !msg->imsi[0]) {
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
196 reject_mt_call(conn, msg->callref, GSM48_CAUSE_LOC_PRN_S_LU,
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
197 GSM48_CC_CAUSE_INVAL_MAND_INF);
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
198 return;
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
199 }
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
200 call = create_new_mt_call();
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
201 if (!call) {
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
202 reject_mt_call(conn, msg->callref, GSM48_CAUSE_LOC_PRN_S_LU,
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
203 GSM48_CC_CAUSE_RESOURCE_UNAVAIL);
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
204 return;
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
205 }
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
206 call->socket = conn;
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
207 call->socket_ref = msg->callref;
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
208 /* forward to GSM MNCC interface */
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
209 msg->callref = call->callref;
27
c6572f4c31d2 themwi-mncc: fix bug in forwarding from call socket to GSM
Mychaela Falconia <falcon@freecalypso.org>
parents: 15
diff changeset
210 send_mncc_to_gsm(msg, sizeof(struct gsm_mncc));
15
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
211 }
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
212
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
213 preen_connected_number(msg)
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
214 struct gsm_mncc *msg;
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
215 {
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
216 if (preen_msc_provided_number(&msg->connected))
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
217 msg->fields |= MNCC_F_CONNECTED;
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
218 else
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
219 msg->fields &= ~MNCC_F_CONNECTED;
ccc5ab6d8388 first version of themwi-mncc for ThemWi2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
220 }