FreeCalypso > hg > themwi-system-sw
annotate rtp-mgr/ctrl_prot.c @ 262:f1c024b2b835
smpp-trx-sa/log.c: additional cleanup
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Wed, 11 Oct 2023 21:21:34 -0800 |
parents | 3962d9345a09 |
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rev | line source |
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1 /* |
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2 * In this module we implement our control socket protocol. |
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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/uio.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 <unistd.h> |
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16 #include "../include/tmgw_const.h" |
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17 #include "../include/rtp_alloc.h" |
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18 #include "struct.h" |
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19 #include "select.h" |
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20 |
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21 extern struct bind_range_cfg bind_range_gsm, bind_range_pstn; |
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22 |
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23 static void |
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24 free_rtp_end(roe) |
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25 struct rtp_one_end *roe; |
32
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26 { |
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27 close(roe->rtp_fd); |
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28 close(roe->rtcp_fd); |
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29 } |
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30 |
180
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31 static void |
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32 close_fds(fd_list, num_fd) |
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33 int *fd_list, num_fd; |
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34 { |
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35 int i; |
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36 |
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37 for (i = 0; i < num_fd; i++) |
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38 close(fd_list[i]); |
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39 } |
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40 |
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41 void |
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42 ctrl_message_handler(fd) |
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43 { |
179
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44 struct rtp_alloc_req req; |
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45 struct rtp_alloc_resp resp; |
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46 struct rtp_one_end rtp_gsm, rtp_pstn; |
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47 struct iovec iov; |
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48 struct msghdr msg; |
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49 int fd_out[4], num_fd, *fd_bufptr; |
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50 union { |
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51 char buf[CMSG_SPACE(sizeof fd_out)]; |
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52 struct cmsghdr align; |
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53 } cmsgu; |
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54 struct cmsghdr *cmsg; |
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55 int rc; |
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56 |
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57 /* receive request */ |
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58 rc = recv(fd, &req, sizeof req, 0); |
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59 if (rc < sizeof req) { |
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60 syslog(LOG_DEBUG, "ctrl connection closing"); |
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61 close(fd); |
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62 FD_CLR(fd, &select_for_read); |
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63 return; |
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64 } |
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65 /* start preparing response */ |
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66 bzero(&resp, sizeof resp); |
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67 resp.transact_ref = req.transact_ref; |
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68 switch (req.ep_type) { |
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69 case TMGW_EP_TYPE_GSM_ONLY: |
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70 case TMGW_EP_TYPE_PSTN_ONLY: |
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71 case TMGW_EP_TYPE_GATEWAY: |
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72 break; |
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73 default: |
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74 resp.res = RTP_ALLOC_ERR_PARAM; |
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75 error_resp: send(fd, &resp, sizeof resp, 0); |
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76 return; |
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77 } |
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78 /* allocate resources */ |
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79 if (req.ep_type & TMGW_EP_HAS_GSM_SOCK) { |
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80 rc = get_rtp_port_pair(&rtp_gsm, &bind_range_gsm); |
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81 if (rc < 0) { |
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82 syslog(LOG_ERR, |
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83 "unable to get local port pair on GSM side"); |
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84 resp.res = RTP_ALLOC_ERR_RSRC; |
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85 goto error_resp; |
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86 } |
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87 } |
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88 if (req.ep_type & TMGW_EP_HAS_PSTN_SOCK) { |
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89 rc = get_rtp_port_pair(&rtp_pstn, &bind_range_pstn); |
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90 if (rc < 0) { |
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91 syslog(LOG_ERR, |
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92 "unable to get local port pair on PSTN side"); |
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93 if (req.ep_type & TMGW_EP_HAS_GSM_SOCK) |
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94 free_rtp_end(&rtp_gsm); |
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95 resp.res = RTP_ALLOC_ERR_RSRC; |
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96 goto error_resp; |
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97 } |
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98 } |
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99 /* finish ordinary body of response */ |
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100 resp.res = RTP_ALLOC_OK; |
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101 if (req.ep_type & TMGW_EP_HAS_GSM_SOCK) |
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102 bcopy(&rtp_gsm.bound_addr, &resp.gsm_addr, |
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103 sizeof(struct sockaddr_in)); |
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104 if (req.ep_type & TMGW_EP_HAS_PSTN_SOCK) |
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105 bcopy(&rtp_pstn.bound_addr, &resp.pstn_addr, |
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106 sizeof(struct sockaddr_in)); |
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107 iov.iov_base = &resp; |
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108 iov.iov_len = sizeof resp; |
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109 /* file descriptor passing voodoo */ |
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110 switch (req.ep_type) { |
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111 case TMGW_EP_TYPE_GSM_ONLY: |
179
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112 num_fd = 2; |
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113 fd_out[0] = rtp_gsm.rtp_fd; |
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114 fd_out[1] = rtp_gsm.rtcp_fd; |
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115 break; |
183
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116 case TMGW_EP_TYPE_PSTN_ONLY: |
179
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117 num_fd = 2; |
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118 fd_out[0] = rtp_pstn.rtp_fd; |
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119 fd_out[1] = rtp_pstn.rtcp_fd; |
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120 break; |
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121 case TMGW_EP_TYPE_GATEWAY: |
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122 num_fd = 4; |
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123 fd_out[0] = rtp_gsm.rtp_fd; |
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124 fd_out[1] = rtp_gsm.rtcp_fd; |
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125 fd_out[2] = rtp_pstn.rtp_fd; |
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126 fd_out[3] = rtp_pstn.rtcp_fd; |
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127 } |
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128 bzero(&msg, sizeof msg); |
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129 msg.msg_iov = &iov; |
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130 msg.msg_iovlen = 1; |
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131 msg.msg_control = cmsgu.buf; |
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132 msg.msg_controllen = CMSG_SPACE(sizeof(int) * num_fd); |
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133 cmsg = CMSG_FIRSTHDR(&msg); |
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134 cmsg->cmsg_level = SOL_SOCKET; |
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135 cmsg->cmsg_type = SCM_RIGHTS; |
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136 cmsg->cmsg_len = CMSG_LEN(sizeof(int) * num_fd); |
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137 fd_bufptr = (int *) CMSG_DATA(cmsg); |
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138 bcopy(fd_out, fd_bufptr, sizeof(int) * num_fd); |
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139 sendmsg(fd, &msg, 0); |
180
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140 close_fds(fd_out, num_fd); |
32
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141 } |