FreeCalypso > hg > themwi-system-sw
annotate sip-in/invite_resp.c @ 154:e54b0a9e322f
beginning of themwi-sip-out
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Tue, 11 Oct 2022 23:04:01 -0800 |
parents | 4b685a5d9bd4 |
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rev | line source |
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1 /* |
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2 * Here we implement SIP INVITE response generation. |
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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 <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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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; |
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83 int rc; |
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84 |
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85 start_response_out_msg(&resp, "180 Ringing"); |
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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); |
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94 sip_mark_end_time(call, sip_linger_error); |
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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 } |
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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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124 call->sip_state = SIP_STATE_MSG_SIZE_ERR; |
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125 call->overall_state = OVERALL_STATE_TEARDOWN; |
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126 disconnect_mncc(call, GSM48_CAUSE_LOC_PRN_S_LU, |
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127 GSM48_CC_CAUSE_INTERWORKING); |
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128 disconnect_tmgw(call); |
109
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129 sip_mark_end_time(call, sip_linger_error); |
66
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130 return; |
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131 } |
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132 sip_tx_packet(&resp, &call->udp_sin); |
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133 call->sip_state = SIP_STATE_INVITE_200; |
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134 call->sip_tx_count = 1; |
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135 } |
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diff
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136 |
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diff
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137 void |
60
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diff
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138 signal_invite_error(call) |
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139 struct call *call; |
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140 { |
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diff
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141 struct sip_msg_out resp; |
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diff
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142 int rc; |
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diff
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143 |
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diff
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144 start_response_out_msg(&resp, call->invite_fail); |
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diff
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145 rc = fill_invite_resp_from_call(&resp, call); |
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diff
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146 if (rc < 0) { |
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diff
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147 syslog(LOG_ERR, "INVITE late error response length exceeded"); |
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diff
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|
148 call->sip_state = SIP_STATE_MSG_SIZE_ERR; |
109
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108
diff
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|
149 sip_mark_end_time(call, sip_linger_error); |
110
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parents:
109
diff
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|
150 transition_dead_sip(call); |
60
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parents:
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diff
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|
151 return; |
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diff
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|
152 } |
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diff
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|
153 out_msg_finish(&resp); |
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diff
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|
154 sip_tx_packet(&resp, &call->udp_sin); |
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diff
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|
155 call->sip_state = SIP_STATE_INVITE_ERR; |
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parents:
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diff
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|
156 call->sip_tx_count = 1; |
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parents:
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diff
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|
157 } |