FreeCalypso > hg > themwi-system-sw
annotate sip-in/cancel.c @ 81:915f0f397fb6
sip-in: beginning of outgoing BYE support
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Tue, 20 Sep 2022 20:11:44 -0800 |
parents | b0df2b200d77 |
children | 0d6435808bcd |
rev | line source |
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sip-in: implement SIP CANCEL
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1 /* |
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2 * Here we implement our handling of SIP CANCEL method. |
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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 <netinet/in.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/gsm48_const.h" |
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15 #include "../libsip/parse.h" |
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16 #include "../libsip/uas_basic.h" |
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17 #include "../libsip/out_msg.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_sip_id(); |
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21 |
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22 static void |
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23 cancel_200_response(req, ess, sin, call) |
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24 struct sip_pkt_rx *req; |
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25 struct uas_parse_hdrs *ess; |
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26 struct sockaddr_in *sin; |
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27 struct call *call; |
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28 { |
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29 struct sip_msg_out resp; |
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30 char cseq_str[32]; |
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31 int rc; |
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32 |
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33 start_response_out_msg(&resp, "200 OK"); |
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34 rc = out_msg_add_header(&resp, "From", call->invite_from); |
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35 if (rc < 0) { |
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36 msg_size_err: syslog(LOG_ERR, "CANCEL 200 response length exceeded"); |
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37 return; |
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38 } |
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39 rc = out_msg_add_header(&resp, "To", call->invite_to); |
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40 if (rc < 0) |
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41 goto msg_size_err; |
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42 rc = out_msg_add_header(&resp, "Call-ID", call->sip_call_id); |
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43 if (rc < 0) |
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44 goto msg_size_err; |
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45 sprintf(cseq_str, "%u CANCEL", call->invite_cseq); |
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46 rc = out_msg_add_header(&resp, "CSeq", cseq_str); |
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47 if (rc < 0) |
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48 goto msg_size_err; |
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49 rc = out_msg_add_header(&resp, "Via", ess->via); |
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50 if (rc < 0) |
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51 goto msg_size_err; |
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52 out_msg_finish(&resp); |
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53 sip_tx_packet(&resp, sin); |
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54 } |
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55 |
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56 static void |
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57 cancel_481_response(req, ess, sin) |
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58 struct sip_pkt_rx *req; |
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59 struct uas_parse_hdrs *ess; |
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60 struct sockaddr_in *sin; |
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61 { |
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62 struct sip_msg_out resp; |
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63 int rc; |
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64 |
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65 start_response_out_msg(&resp, "481 Call-ID/CSeq not found"); |
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66 rc = add_resp_basic_headers(&resp, ess, req->req_method); |
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67 if (rc < 0) |
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68 return; |
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69 out_msg_finish(&resp); |
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70 sip_tx_packet(&resp, sin); |
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71 } |
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72 |
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73 void |
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74 handle_sip_cancel(req, ess, sin) |
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75 struct sip_pkt_rx *req; |
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76 struct uas_parse_hdrs *ess; |
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77 struct sockaddr_in *sin; |
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78 { |
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79 struct call *call; |
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80 |
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81 call = find_call_by_sip_id(ess->call_id); |
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82 if (!call) { |
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83 cancel_481_response(req, ess, sin); |
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84 return; |
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85 } |
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86 /* weed out wrong CSeq */ |
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87 if (ess->cseq_num != call->invite_cseq) { |
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88 cancel_481_response(req, ess, sin); |
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89 return; |
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90 } |
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91 /* it is for us - act on it */ |
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92 switch (call->sip_state) { |
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93 case SIP_STATE_INVITE_PROC: |
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94 case SIP_STATE_RINGING: |
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95 case SIP_STATE_RINGING_PRACK: |
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96 call->overall_state = OVERALL_STATE_TEARDOWN; |
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97 disconnect_mncc(call, GSM48_CAUSE_LOC_NET_BEYOND, |
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98 GSM48_CC_CAUSE_NORM_CALL_CLEAR); |
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99 disconnect_tmgw(call); |
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100 strcpy(call->invite_fail, "487 Call attempt terminated"); |
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101 signal_invite_error(call); |
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102 break; |
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103 case SIP_STATE_MSG_SIZE_ERR: |
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104 return; |
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105 } |
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106 cancel_200_response(req, ess, sin, call); |
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107 } |