FreeCalypso > hg > themwi-system-sw
annotate sip-in/invite.c @ 50:daf1c26d7ae2
sip-in: check INVITE Content-Type header
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Tue, 06 Sep 2022 23:50:16 -0800 |
parents | dec31b1a8b96 |
children | 36a30349b490 |
rev | line source |
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1 /* |
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2 * Here we implement our handling of SIP INVITE 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 <stdlib.h> |
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10 #include <string.h> |
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11 #include <strings.h> |
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12 #include <syslog.h> |
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13 #include <unistd.h> |
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14 #include "../libsip/parse.h" |
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15 #include "../libsip/uas_basic.h" |
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16 #include "../libsip/req_supp.h" |
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17 #include "../libsip/out_msg.h" |
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18 |
49
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19 extern int cfg_use_100rel; |
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20 |
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21 extern char *get_single_header(); |
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22 |
48
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23 void |
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24 handle_sip_invite(req, ess, sin) |
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25 struct sip_pkt_rx *req; |
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26 struct uas_parse_hdrs *ess; |
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27 struct sockaddr_in *sin; |
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28 { |
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29 char uri_user[13], *called_nanp; |
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30 struct sip_msg_out resp; |
49
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31 struct supported_ext supp_ext; |
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32 char *hval, *unsup_ext; |
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33 int ext_100rel_req, ext_100rel_sup, use_100rel; |
48
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34 int rc; |
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35 |
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36 /* check for existing Call-ID will go here */ |
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37 /* extract called number from Request-URI */ |
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38 rc = user_from_sip_uri(req->req_uri, uri_user, 12); |
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39 if (rc < 0) { |
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40 not_nanp: start_response_out_msg(&resp, |
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41 "416 Request-URI is not a NANP number"); |
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42 error_resp: rc = add_resp_basic_headers(&resp, ess, req->req_method); |
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43 if (rc < 0) { |
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44 error_resp_toolong: syslog(LOG_ERR, |
48
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45 "INVITE error response length exceeded"); |
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46 return; |
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47 } |
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48 out_msg_finish(&resp); |
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49 sip_tx_packet(&resp, sin); |
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50 return; |
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51 } |
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52 if (uri_user[0] == '+') { |
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53 if (grok_number_string(uri_user+1, 0) != 11 || |
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54 uri_user[1] != '1') |
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55 goto not_nanp; |
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56 called_nanp = uri_user + 2; |
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57 } else switch (grok_number_string(uri_user)) { |
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58 case 10: |
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59 called_nanp = uri_user; |
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60 break; |
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61 case 11: |
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62 if (uri_user[0] != '1') |
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63 goto not_nanp; |
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64 called_nanp = uri_user + 1; |
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65 break; |
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66 default: |
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67 goto not_nanp; |
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68 } |
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69 if (!is_nanp_valid_prefix(called_nanp)) |
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70 goto not_nanp; |
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71 /* it is valid NANP - but is it one of ours? */ |
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72 refresh_number_db(); |
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73 if (!is_nanp_locally_owned(called_nanp)) { |
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74 start_response_out_msg(&resp, |
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75 "404 Called number does not belong here"); |
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76 goto error_resp; |
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77 } |
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78 /* check 100rel and catch any unsupported requirements */ |
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79 supp_ext.name = "100rel"; |
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80 supp_ext.req_flag = &ext_100rel_req; |
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81 supp_ext.sup_flag = &ext_100rel_sup; |
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82 ext_100rel_req = ext_100rel_sup = 0; |
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48
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83 rc = parse_require_supported(req, &supp_ext, 1, &unsup_ext); |
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84 if (rc < 0) { |
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48
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85 start_response_out_msg(&resp, "420 Extension not supported"); |
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48
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86 rc = out_msg_add_header(&resp, "Unsupported", unsup_ext); |
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87 if (rc < 0) |
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88 goto error_resp_toolong; |
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48
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89 goto error_resp; |
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48
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90 } |
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48
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91 if (ext_100rel_req) |
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48
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92 use_100rel = 1; |
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48
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93 else if (ext_100rel_sup) |
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94 use_100rel = cfg_use_100rel; |
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48
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95 else |
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48
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96 use_100rel = 0; |
50
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49
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97 /* did the caller send an SDP message body? */ |
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49
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98 if (!req->msg_body_len) { |
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49
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99 start_response_out_msg(&resp, "415 Missing SDP body"); |
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49
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100 error_415: rc = out_msg_add_header(&resp, "Accept", "application/sdp"); |
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49
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101 if (rc < 0) |
daf1c26d7ae2
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49
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102 goto error_resp_toolong; |
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Mychaela Falconia <falcon@freecalypso.org>
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49
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103 goto error_resp; |
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49
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104 } |
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Mychaela Falconia <falcon@freecalypso.org>
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49
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105 hval = get_single_header(req, "Content-Type", "c", (int *) 0); |
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Mychaela Falconia <falcon@freecalypso.org>
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49
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106 if (!hval) { |
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Mychaela Falconia <falcon@freecalypso.org>
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49
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107 start_response_out_msg(&resp, |
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Mychaela Falconia <falcon@freecalypso.org>
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49
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108 "415 Missing Content-Type header"); |
daf1c26d7ae2
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Mychaela Falconia <falcon@freecalypso.org>
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49
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109 goto error_415; |
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Mychaela Falconia <falcon@freecalypso.org>
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49
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110 } |
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Mychaela Falconia <falcon@freecalypso.org>
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49
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111 if (strcasecmp(hval, "application/sdp")) { |
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Mychaela Falconia <falcon@freecalypso.org>
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49
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112 start_response_out_msg(&resp, "415 Unsupported Content-Type"); |
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sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
parents:
49
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113 goto error_415; |
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sip-in: check INVITE Content-Type header
Mychaela Falconia <falcon@freecalypso.org>
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114 } |
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Mychaela Falconia <falcon@freecalypso.org>
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115 /* |
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Mychaela Falconia <falcon@freecalypso.org>
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116 * Remaining checks to be implemented: |
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Mychaela Falconia <falcon@freecalypso.org>
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117 * SDP message body |
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Mychaela Falconia <falcon@freecalypso.org>
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118 */ |
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119 } |