FreeCalypso > hg > themwi-system-sw

annotate sip-manual-out/uas.c @ 97:9aed16c30622

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mgw p2g: set M bit when restarting forwarding after no-forward
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 25 Sep 2022 20:05:02 -0800
parents dd845c4933e1
children 94b5831c017f
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1 /*
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2 * UAS for sip-manual-out.
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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 <stdlib.h>
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10 #include <string.h>
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11 #include <strings.h>
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12 #include "../libsip/parse.h"
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13 #include "../libsip/uas_basic.h"
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14 #include "../libsip/out_msg.h"
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15
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16 extern char call_id[];
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17
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18 static void
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19 bye_correct_call(req, ess, sin)
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20 struct sip_pkt_rx *req;
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21 struct uas_parse_hdrs *ess;
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22 struct sockaddr_in *sin;
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23 {
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24 struct sip_msg_out resp;
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25 int rc;
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27 printf("Received BYE for our call, responding with 200\n");
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28 start_response_out_msg(&resp, "200 OK");
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29 rc = add_resp_basic_headers(&resp, ess, req->req_method);
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30 if (rc < 0) {
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31 fprintf(stderr, "sending 200 response: msg length exceeded\n");
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32 return;
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33 }
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34 out_msg_finish(&resp);
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35 sip_tx_packet(&resp, sin);
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36 }
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38 static void
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39 bye_unknown_call(req, ess, sin)
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40 struct sip_pkt_rx *req;
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41 struct uas_parse_hdrs *ess;
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42 struct sockaddr_in *sin;
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43 {
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44 struct sip_msg_out resp;
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45 int rc;
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46
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47 printf("Received BYE for unknown call, responding with 481\n");
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48 start_response_out_msg(&resp, "481 Call-ID not found");
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49 rc = add_resp_basic_headers(&resp, ess, req->req_method);
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50 if (rc < 0) {
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51 fprintf(stderr, "sending 481 response: msg length exceeded\n");
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52 return;
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53 }
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54 out_msg_finish(&resp);
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55 sip_tx_packet(&resp, sin);
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56 }
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58 static void
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59 handle_bye(req, ess, sin)
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60 struct sip_pkt_rx *req;
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61 struct uas_parse_hdrs *ess;
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62 struct sockaddr_in *sin;
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63 {
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64 if (!strcmp(ess->call_id, call_id))
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65 bye_correct_call(req, ess, sin);
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66 else
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67 bye_unknown_call(req, ess, sin);
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68 }
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70 static void
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71 unsupported_method(req, ess, sin)
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72 struct sip_pkt_rx *req;
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73 struct uas_parse_hdrs *ess;
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74 struct sockaddr_in *sin;
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75 {
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76 struct sip_msg_out resp;
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77 int rc;
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78
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79 printf("SIP %.16s request: unsupported method\n", req->req_method);
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80 start_response_out_msg(&resp, "501 Method not supported");
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81 rc = add_resp_basic_headers(&resp, ess, req->req_method);
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82 if (rc < 0) {
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83 too_long: fprintf(stderr,
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84 "sending 501 error: response length exceeded\n");
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85 return;
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86 }
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87 rc = out_msg_add_header(&resp, "Allow", "BYE");
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88 if (rc < 0)
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89 goto too_long;
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90 out_msg_finish(&resp);
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91 sip_tx_packet(&resp, sin);
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92 }
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93
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94 void
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95 process_sip_request(msg, sin)
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96 struct sip_pkt_rx *msg;
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97 struct sockaddr_in *sin;
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98 {
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99 struct uas_parse_hdrs ess;
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100 int rc;
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101
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102 rc = uas_get_basic_headers(msg, &ess);
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103 if (rc < 0) {
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104 printf("SIP %.16s request: bad or missing %s header\n",
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105 msg->req_method, ess.error_field);
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106 return;
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107 }
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108 /* dispatch by method */
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109 if (!strcmp(msg->req_method, "BYE"))
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110 handle_bye(msg, &ess, sin);
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111 else if (!strcmp(msg->req_method, "ACK"))
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112 printf("Received unexpected ACK, swallowing it\n");
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113 else
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114 unsupported_method(msg, &ess, sin);
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115 }