FreeCalypso > hg > themwi-system-sw

annotate sip-in/invite_resp.c @ 145:4b685a5d9bd4

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sip-in code: split invite.c into 3 separate C modules
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 08 Oct 2022 19:31:05 -0800
parents sip-in/invite.c@c93c339271a7
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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8117d8ee44a5 sip-in: beginning of INVITE handling
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1 /*
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2 * Here we implement SIP INVITE response generation.
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3 */
8117d8ee44a5 sip-in: beginning of INVITE handling
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4
8117d8ee44a5 sip-in: beginning of INVITE handling
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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 <arpa/inet.h>
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10 #include <stdio.h>
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11 #include <stdint.h>
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12 #include <stdlib.h>
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13 #include <string.h>
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14 #include <strings.h>
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15 #include <syslog.h>
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16 #include "../include/gsm48_const.h"
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17 #include "../libsip/sdp.h"
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18 #include "../libsip/out_msg.h"
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19 #include "call.h"
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20
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21 extern struct in_addr sip_bind_ip;
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22 extern unsigned sip_bind_port;
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23 extern unsigned sip_linger_error;
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dec31b1a8b96 sip-in: check Require and Supported
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24
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25 fill_invite_resp_from_call(msg, call)
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26 struct sip_msg_out *msg;
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27 struct call *call;
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28 {
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29 char cseq_str[32];
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30 int rc;
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31
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32 rc = out_msg_add_header(msg, "From", call->invite_from);
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33 if (rc < 0)
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34 return rc;
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35 rc = out_msg_add_header(msg, "To", call->invite_to);
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36 if (rc < 0)
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37 return rc;
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38 rc = out_msg_add_header(msg, "Call-ID", call->sip_call_id);
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39 if (rc < 0)
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40 return rc;
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41 sprintf(cseq_str, "%u INVITE", call->invite_cseq);
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42 rc = out_msg_add_header(msg, "CSeq", cseq_str);
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43 if (rc < 0)
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44 return rc;
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45 return out_msg_add_header(msg, "Via", call->invite_via);
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46 }
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47
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48 fill_invite_200_resp(msg, call)
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49 struct sip_msg_out *msg;
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50 struct call *call;
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51 {
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52 char contact_str[80];
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53 struct sdp_gen sdp;
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54 int rc;
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55
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56 start_response_out_msg(msg, "200 CONNECT");
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57 rc = fill_invite_resp_from_call(msg, call);
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58 if (rc < 0)
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59 return rc;
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60 sprintf(contact_str, "<sip:%s:%u;transport=udp>",
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61 inet_ntoa(sip_bind_ip), sip_bind_port);
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62 rc = out_msg_add_header(msg, "Contact", contact_str);
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63 if (rc < 0)
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64 return rc;
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65 rc = out_msg_add_header(msg, "Content-Type", "application/sdp");
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66 if (rc < 0)
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67 return rc;
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68 bzero(&sdp, sizeof sdp);
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69 sdp.conn_ip = call->pstn_rtp_local.sin_addr;
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70 sdp.conn_port = ntohs(call->pstn_rtp_local.sin_port);
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71 sdp.codec_mask = call->use_pcma ? SDP_CODEC_MASK_PCMA
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72 : SDP_CODEC_MASK_PCMU;
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73 sdp.session_id = (sdp.conn_port << 16) | call->sdp_addend;
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74 sdp.owner_ip = sip_bind_ip;
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75 return out_msg_finish_sdp(msg, &sdp);
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76 }
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77
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78 void
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79 signal_invite_ringing(call)
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80 struct call *call;
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81 {
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82 struct sip_msg_out resp;
108
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83 int rc;
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84
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85 start_response_out_msg(&resp, "180 Ringing");
108
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86 rc = fill_invite_resp_from_call(&resp, call);
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87 if (rc < 0) {
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88 msg_size_err: syslog(LOG_ERR, "INVITE 180 response length exceeded");
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89 call->sip_state = SIP_STATE_MSG_SIZE_ERR;
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90 call->overall_state = OVERALL_STATE_TEARDOWN;
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91 disconnect_mncc(call, GSM48_CAUSE_LOC_PRN_S_LU,
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92 GSM48_CC_CAUSE_INTERWORKING);
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93 disconnect_tmgw(call);
109
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94 sip_mark_end_time(call, sip_linger_error);
108
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95 return;
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96 }
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97 if (call->use_100rel) {
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98 rc = out_msg_add_header(&resp, "Require", "100rel");
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99 if (rc < 0)
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100 goto msg_size_err;
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101 rc = out_msg_add_header(&resp, "RSeq", "1");
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102 if (rc < 0)
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103 goto msg_size_err;
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104 }
65
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105 out_msg_finish(&resp);
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106 sip_tx_packet(&resp, &call->udp_sin);
108
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107 if (call->use_100rel) {
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108 call->sip_state = SIP_STATE_RINGING_REL;
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109 call->sip_tx_count = 1;
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110 } else
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111 call->sip_state = SIP_STATE_RINGING;
65
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112 }
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113
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114 void
66
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115 signal_invite_200(call)
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116 struct call *call;
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117 {
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118 struct sip_msg_out resp;
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119 int rc;
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120
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121 rc = fill_invite_200_resp(&resp, call);
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122 if (rc < 0) {
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123 syslog(LOG_ERR, "INVITE 200 response length exceeded");
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parents: 65
diff changeset
124 call->sip_state = SIP_STATE_MSG_SIZE_ERR;
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parents: 65
diff changeset
125 call->overall_state = OVERALL_STATE_TEARDOWN;
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parents: 65
diff changeset
126 disconnect_mncc(call, GSM48_CAUSE_LOC_PRN_S_LU,
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parents: 65
diff changeset
127 GSM48_CC_CAUSE_INTERWORKING);
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parents: 65
diff changeset
128 disconnect_tmgw(call);
109
9b87894704eb sip-in: first step toward final call clearing
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parents: 108
diff changeset
129 sip_mark_end_time(call, sip_linger_error);
66
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parents: 65
diff changeset
130 return;
5beb51de1bae sip-in: got as far as propagating GSM CC CONNECT to INVITE 200
Mychaela Falconia <falcon@freecalypso.org>
parents: 65
diff changeset
131 }
5beb51de1bae sip-in: got as far as propagating GSM CC CONNECT to INVITE 200
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parents: 65
diff changeset
132 sip_tx_packet(&resp, &call->udp_sin);
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parents: 65
diff changeset
133 call->sip_state = SIP_STATE_INVITE_200;
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parents: 65
diff changeset
134 call->sip_tx_count = 1;
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parents: 65
diff changeset
135 }
5beb51de1bae sip-in: got as far as propagating GSM CC CONNECT to INVITE 200
Mychaela Falconia <falcon@freecalypso.org>
parents: 65
diff changeset
136
5beb51de1bae sip-in: got as far as propagating GSM CC CONNECT to INVITE 200
Mychaela Falconia <falcon@freecalypso.org>
parents: 65
diff changeset
137 void
60
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
138 signal_invite_error(call)
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parents: 57
diff changeset
139 struct call *call;
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
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parents: 57
diff changeset
140 {
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
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parents: 57
diff changeset
141 struct sip_msg_out resp;
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parents: 57
diff changeset
142 int rc;
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parents: 57
diff changeset
143
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Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
144 start_response_out_msg(&resp, call->invite_fail);
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parents: 57
diff changeset
145 rc = fill_invite_resp_from_call(&resp, call);
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parents: 57
diff changeset
146 if (rc < 0) {
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parents: 57
diff changeset
147 syslog(LOG_ERR, "INVITE late error response length exceeded");
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
148 call->sip_state = SIP_STATE_MSG_SIZE_ERR;
109
9b87894704eb sip-in: first step toward final call clearing
Mychaela Falconia <falcon@freecalypso.org>
parents: 108
diff changeset
149 sip_mark_end_time(call, sip_linger_error);
110
c1c94b7fc2e2 sip-in call clearing: DEAD_SIP transition implemented
Mychaela Falconia <falcon@freecalypso.org>
parents: 109
diff changeset
150 transition_dead_sip(call);
60
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parents: 57
diff changeset
151 return;
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
152 }
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
153 out_msg_finish(&resp);
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
154 sip_tx_packet(&resp, &call->udp_sin);
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Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
155 call->sip_state = SIP_STATE_INVITE_ERR;
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
Mychaela Falconia <falcon@freecalypso.org>
parents: 57
diff changeset
156 call->sip_tx_count = 1;
02761f1ae5e5 sip-in INVITE processing: got as far as CRCX completion
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parents: 57
diff changeset
157 }