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annotate mgw/mdcx.c @ 174:c985c33baeac

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mgw: support EFR by way of libgsmefr
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 10 Jan 2023 17:56:22 -0800
parents a6eb2de277f6
children 0047c4c08d9e
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Mychaela Falconia <falcon@freecalypso.org>
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1 /*
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2 * In this module we implement our MDCX operation.
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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 <stdio.h>
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10 #include <stdint.h>
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11 #include <stdlib.h>
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12 #include <string.h>
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13 #include <strings.h>
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14 #include <syslog.h>
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15 #include "../include/tmgw_ctrl.h"
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16 #include "../include/tmgw_const.h"
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17 #include "struct.h"
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18 #include "int_defs.h"
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19
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20 extern struct endpoint *find_ep_by_id();
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21
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22 static void
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23 gsm_vars_init(ep)
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24 struct endpoint *ep;
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25 {
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26 switch (ep->gsm_payload_msg_type) {
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27 case GSM_TCHF_FRAME:
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28 ep->gsm_rtp_pkt_size = RTP_PACKET_SIZE_GSM_FR;
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29 ep->gsm_payload_magic = 0xD0;
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30 return;
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31 case GSM_TCHF_FRAME_EFR:
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32 ep->gsm_rtp_pkt_size = RTP_PACKET_SIZE_GSM_EFR;
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33 ep->gsm_payload_magic = 0xC0;
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34 return;
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35 }
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36 }
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37
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38 mdcx_operation(ep, req)
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39 struct endpoint *ep;
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40 struct tmgw_ctrl_req *req;
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41 {
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42 int rc;
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43
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44 if (req->setup_mask & TMGW_CTRL_MASK_GSM_CONN) {
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45 if (ep->ep_type != TMGW_EP_TYPE_GATEWAY)
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46 return TMGW_RESP_ERR_PROT;
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47 if (req->gsm_addr.ss_family != AF_INET)
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48 return TMGW_RESP_ERR_PARAM;
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49 if (req->gsm_payload_type > 0x7F)
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50 return TMGW_RESP_ERR_PARAM;
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51 switch (req->gsm_payload_msg_type) {
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52 case GSM_TCHF_FRAME:
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53 case GSM_TCHF_FRAME_EFR:
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54 break;
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55 case GSM_TCHH_FRAME:
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56 case GSM_TCH_FRAME_AMR:
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57 return TMGW_RESP_ERR_NOTSUP;
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58 default:
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59 return TMGW_RESP_ERR_PARAM;
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60 }
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61 if (ep->gsm_payload_msg_type &&
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62 ep->gsm_payload_msg_type != req->gsm_payload_msg_type)
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63 return TMGW_RESP_ERR_PROT;
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64 bcopy(&req->gsm_addr, &ep->rtp_gsm.remote_addr,
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65 sizeof(struct sockaddr_in));
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66 ep->gsm_payload_type = req->gsm_payload_type;
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67 ep->gsm_payload_msg_type = req->gsm_payload_msg_type;
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68 gsm_vars_init(ep);
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69 }
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70 if (req->setup_mask & TMGW_CTRL_MASK_PSTN_CONN) {
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71 if (ep->ep_type != TMGW_EP_TYPE_GATEWAY)
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72 return TMGW_RESP_ERR_PROT;
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73 if (req->pstn_addr.ss_family != AF_INET)
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74 return TMGW_RESP_ERR_PARAM;
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75 switch (req->pstn_payload_type) {
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76 case PSTN_CODEC_PCMU:
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77 case PSTN_CODEC_PCMA:
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78 break;
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79 default:
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80 return TMGW_RESP_ERR_PARAM;
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81 }
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82 bcopy(&req->pstn_addr, &ep->rtp_pstn.remote_addr,
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83 sizeof(struct sockaddr_in));
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84 ep->pstn_payload_type = req->pstn_payload_type;
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85 }
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86 if (req->setup_mask & TMGW_CTRL_MASK_FWD_MODE) {
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87 if (ep->ep_type != TMGW_EP_TYPE_GATEWAY ||
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88 ep->rtp_gsm.remote_addr.sin_family != AF_INET ||
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89 ep->rtp_pstn.remote_addr.sin_family != AF_INET)
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90 return TMGW_RESP_ERR_PROT;
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91 if (req->fwd_mode & TMGW_FWD_ENABLE_GSM2PSTN) {
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92 rc = gsm2pstn_init(ep);
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93 if (rc != TMGW_RESP_OK)
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94 return rc;
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95 } else
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96 ep->dtmf_sample_ptr = 0;
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97 if (req->fwd_mode & TMGW_FWD_ENABLE_PSTN2GSM) {
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98 rc = pstn2gsm_init(ep);
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99 if (rc != TMGW_RESP_OK)
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100 return rc;
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101 }
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102 ep->fwd_mode = req->fwd_mode;
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103 }
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104 return TMGW_RESP_OK;
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105 }
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106
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107 void
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108 process_mdcx(conn, req, resp)
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109 struct ctrl_conn *conn;
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110 struct tmgw_ctrl_req *req;
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111 struct tmgw_ctrl_resp *resp;
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112 {
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113 struct endpoint *ep;
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114
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115 ep = find_ep_by_id(conn, req->ep_id);
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116 if (!ep) {
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117 resp->res = TMGW_RESP_ERR_PROT;
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118 return;
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119 }
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120 resp->res = mdcx_operation(ep, req);
32
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121 }