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annotate mgw/mdcx.c @ 99:738be11ac432

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mgw internal code: simplify MDCX error handling
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 26 Sep 2022 13:42:46 -0800
parents f280328e7e2e
children 1579ec0e9fb9
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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 <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/tmgw_ctrl.h"
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15 #include "../include/tmgw_const.h"
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16 #include "struct.h"
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17
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18 extern struct endpoint *find_ep_by_id();
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19
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20 mdcx_operation(ep, req)
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21 struct endpoint *ep;
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22 struct tmgw_ctrl_req *req;
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23 {
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24 int rc;
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25
32
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26 if (req->setup_mask & TMGW_CTRL_MASK_GSM_CONN) {
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27 if (ep->ep_type != TMGW_EP_TYPE_GATEWAY)
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28 return TMGW_RESP_ERR_PROT;
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29 if (req->gsm_addr.ss_family != AF_INET)
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30 return TMGW_RESP_ERR_PARAM;
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31 if (req->gsm_payload_type > 0x7F)
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32 return TMGW_RESP_ERR_PARAM;
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33 switch (req->gsm_payload_msg_type) {
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34 case GSM_TCHF_FRAME:
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35 break;
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36 case GSM_TCHF_FRAME_EFR:
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37 case GSM_TCHH_FRAME:
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38 case GSM_TCH_FRAME_AMR:
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39 return TMGW_RESP_ERR_NOTSUP;
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40 default:
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41 return TMGW_RESP_ERR_PARAM;
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42 }
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43 if (ep->gsm_payload_msg_type &&
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44 ep->gsm_payload_msg_type != req->gsm_payload_msg_type)
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45 return TMGW_RESP_ERR_PROT;
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46 bcopy(&req->gsm_addr, &ep->rtp_gsm.remote_addr,
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47 sizeof(struct sockaddr_in));
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48 ep->gsm_payload_type = req->gsm_payload_type;
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49 ep->gsm_payload_msg_type = req->gsm_payload_msg_type;
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50 }
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51 if (req->setup_mask & TMGW_CTRL_MASK_PSTN_CONN) {
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52 if (ep->ep_type != TMGW_EP_TYPE_GATEWAY)
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53 return TMGW_RESP_ERR_PROT;
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54 if (req->pstn_addr.ss_family != AF_INET)
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55 return TMGW_RESP_ERR_PARAM;
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56 switch (req->pstn_payload_type) {
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57 case PSTN_CODEC_PCMU:
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58 case PSTN_CODEC_PCMA:
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59 break;
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60 default:
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61 return TMGW_RESP_ERR_PARAM;
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62 }
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63 bcopy(&req->pstn_addr, &ep->rtp_pstn.remote_addr,
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64 sizeof(struct sockaddr_in));
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65 ep->pstn_payload_type = req->pstn_payload_type;
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66 }
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67 if (req->setup_mask & TMGW_CTRL_MASK_FWD_MODE) {
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68 if (ep->ep_type != TMGW_EP_TYPE_GATEWAY ||
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69 ep->rtp_gsm.remote_addr.sin_family != AF_INET ||
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70 ep->rtp_pstn.remote_addr.sin_family != AF_INET)
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71 return TMGW_RESP_ERR_PROT;
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72 if ((req->fwd_mode & TMGW_FWD_ENABLE_PSTN2GSM) &&
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73 !(ep->fwd_mode & TMGW_FWD_ENABLE_PSTN2GSM)) {
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74 rc = pstn2gsm_init(ep);
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75 if (rc != TMGW_RESP_OK)
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76 return rc;
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77 }
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78 ep->fwd_mode = req->fwd_mode;
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79 }
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80 return TMGW_RESP_OK;
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81 }
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82
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83 void
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84 process_mdcx(conn, req, resp)
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85 struct ctrl_conn *conn;
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86 struct tmgw_ctrl_req *req;
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87 struct tmgw_ctrl_resp *resp;
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88 {
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89 struct endpoint *ep;
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90 int rc;
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91
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92 ep = find_ep_by_id(conn, req->ep_id);
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93 if (!ep) {
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94 resp->res = TMGW_RESP_ERR_PROT;
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95 return;
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96 }
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97 resp->res = mdcx_operation(ep, req);
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98 }