FreeCalypso > hg > themwi-system-sw
annotate sip-out/call_setup.c @ 164:baaa6c1a3d3b
sip-out shutdown handling: always do check_dead_call()
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Wed, 12 Oct 2022 16:31:15 -0800 |
parents | e54b0a9e322f |
children | e89619893c1e |
rev | line source |
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1 /* |
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2 * In this module we implement our initial handling of MNCC_SETUP_IND. |
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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 "../include/out_routes.h" |
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18 #include "call.h" |
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19 |
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20 extern struct call *find_call_by_mncc_callref(); |
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21 |
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22 extern int block_1900_numbers; |
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23 extern struct call *call_list; |
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24 |
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25 static void |
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26 reject_mo_call(mncc, callref, cause_loc, cause_val) |
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27 struct mncc_conn *mncc; |
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28 uint32_t callref; |
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29 { |
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30 struct gsm_mncc msg; |
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31 |
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32 bzero(&msg, sizeof(struct gsm_mncc)); |
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33 msg.msg_type = MNCC_REJ_REQ; |
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34 msg.callref = callref; |
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35 mncc_set_cause(&msg, cause_loc, cause_val); |
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36 send_mncc_to_sock(mncc, &msg, sizeof(struct gsm_mncc)); |
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37 } |
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38 |
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39 static void |
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40 send_call_proceeding(call) |
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41 struct call *call; |
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42 { |
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43 struct gsm_mncc msg; |
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44 |
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45 bzero(&msg, sizeof(struct gsm_mncc)); |
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46 msg.msg_type = MNCC_CALL_PROC_REQ; |
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47 msg.callref = call->mncc_callref; |
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48 send_mncc_to_sock(call->mncc, &msg, sizeof(struct gsm_mncc)); |
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49 } |
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50 |
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51 void |
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52 handle_setup_ind(mncc, msg, msglen) |
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53 struct mncc_conn *mncc; |
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54 struct gsm_mncc *msg; |
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55 unsigned msglen; |
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56 { |
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57 struct call *call; |
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58 struct sip_out_dest *dest; |
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59 struct special_num_route *special_rt; |
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60 char to_sip_user[MAX_SIP_USER_PART+1]; |
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61 int rc; |
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62 |
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63 if (msglen != sizeof(struct gsm_mncc)) { |
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64 syslog(LOG_CRIT, |
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65 "FATAL: Rx MNCC_SETUP_IND has wrong length"); |
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66 exit(1); |
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67 } |
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68 /* check for duplicates */ |
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69 call = find_call_by_mncc_callref(mncc, msg->callref); |
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70 if (call) { |
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71 syslog(LOG_ERR, "duplicate MNCC_SETUP_IND for callref 0x%x", |
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72 msg->callref); |
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73 /* drop it like OsmoMSC's mncc_builtin does */ |
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74 return; |
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75 } |
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76 if (!(msg->fields & MNCC_F_CALLED) || |
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77 !(msg->fields & MNCC_F_BEARER_CAP)) { |
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78 syslog(LOG_ERR, "rejecting MO call 0x%x: missing mandatory IE", |
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79 msg->callref); |
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80 reject_mo_call(mncc, msg->callref, GSM48_CAUSE_LOC_PRN_S_LU, |
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81 GSM48_CC_CAUSE_INVAL_MAND_INF); |
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82 return; |
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83 } |
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84 /* route based on destination address */ |
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85 refresh_out_routes_db(); |
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86 if (msg->called.type == GSM48_TON_INTERNATIONAL) { |
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87 rc = grok_number_string(msg->called.number, 0); |
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88 if (rc < 2 || rc > MAX_E164_NUMBER) { |
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89 inv_nr_format: reject_mo_call(mncc, msg->callref, |
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90 GSM48_CAUSE_LOC_PRN_S_LU, |
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91 GSM48_CC_CAUSE_INV_NR_FORMAT); |
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92 return; |
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93 } |
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94 if (msg->called.number[0] == '0') |
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95 goto inv_nr_format; |
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96 if (msg->called.number[0] == '1') { |
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97 if (rc != 11) |
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98 goto inv_nr_format; |
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99 if (!is_nanp_valid_prefix(msg->called.number+1)) |
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100 goto inv_nr_format; |
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101 if (msg->called.number[1] == '9' && |
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102 msg->called.number[2] == '0' && |
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103 msg->called.number[3] == '0' && |
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104 block_1900_numbers) { |
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105 call_barred: reject_mo_call(mncc, msg->callref, |
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106 GSM48_CAUSE_LOC_PRN_S_LU, |
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107 GSM48_CC_CAUSE_OP_DET_BARRING); |
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beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
108 return; |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
109 } |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
110 } |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
111 rc = route_e164_number(msg->called.number, &dest); |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
112 if (!rc) { |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
113 no_route_to_dest: reject_mo_call(mncc, msg->callref, |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
114 GSM48_CAUSE_LOC_PRN_S_LU, |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
115 GSM48_CC_CAUSE_NO_ROUTE); |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
116 return; |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
117 } |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
118 to_sip_user[0] = '+'; |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
119 strcpy(to_sip_user+1, msg->called.number); |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
120 } else { |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
121 rc = route_special_number(msg->called.number, &dest, |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
122 &special_rt); |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
123 if (!rc) |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
124 goto no_route_to_dest; |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
125 strcpy(to_sip_user, special_rt->sip_user); |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
126 } |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
127 /* validate From number */ |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
128 if (!(msg->fields & MNCC_F_CALLING)) |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
129 goto call_barred; |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
130 if (msg->calling.type != GSM48_TON_INTERNATIONAL) |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
131 goto call_barred; |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
132 if (grok_number_string(msg->calling.number, 0) != 11 || |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
133 msg->calling.number[0] != '1') |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
134 goto call_barred; |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
135 /* speech-only restriction */ |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
136 if (msg->bearer_cap.transfer != GSM48_BCAP_ITCAP_SPEECH || |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
137 msg->bearer_cap.mode != GSM48_BCAP_TMOD_CIRCUIT) { |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
138 syslog(LOG_ERR, "rejecting MO call 0x%x: bad bearer cap", |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
139 msg->callref); |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
140 reject_mo_call(mncc, msg->callref, GSM48_CAUSE_LOC_PRN_S_LU, |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
141 GSM48_CC_CAUSE_BEARER_CA_UNAVAIL); |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
142 return; |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
143 } |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
144 /* TMGW must be up and running */ |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
145 rc = connect_tmgw_socket(); |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
146 if (rc < 0) { |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
147 reject_mo_call(mncc, msg->callref, GSM48_CAUSE_LOC_PRN_S_LU, |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
148 GSM48_CC_CAUSE_NETWORK_OOO); |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
149 return; |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
150 } |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
151 /* allocate struct call and being stateful processing */ |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
152 call = malloc(sizeof(struct call)); |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
153 if (!call) { |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
154 syslog(LOG_CRIT, "failed malloc for outbound call!"); |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
155 reject_mo_call(mncc, msg->callref, GSM48_CAUSE_LOC_PRN_S_LU, |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
156 GSM48_CC_CAUSE_RESOURCE_UNAVAIL); |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
157 return; |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
158 } |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
159 bzero(call, sizeof(struct call)); |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
160 call->mncc = mncc; |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
161 call->mncc_callref = msg->callref; |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
162 call->from_user[0] = '+'; |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
163 strcpy(call->from_user+1, msg->calling.number); |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
164 sprintf(call->to_uri, "sip:%s@%s", to_sip_user, dest->domain); |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
165 bcopy(&dest->sin, &call->udp_sin, sizeof(struct sockaddr_in)); |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
166 call->next = call_list; |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
167 call_list = call; |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
168 send_call_proceeding(call); |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
169 call->overall_state = OVERALL_STATE_GSM_RTP; |
e54b0a9e322f
beginning of themwi-sip-out
Mychaela Falconia <falcon@freecalypso.org>
parents:
115
diff
changeset
|
170 call->mncc_state = MNCC_STATE_MO_PROC; |
62
75b7a7b61824
sip-in: got as far as sending MNCC_SETUP_REQ to themwi-mncc
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
171 } |