FreeCalypso > hg > themwi-rtp-mgr
annotate librtpalloc/simple_client.c @ 9:3e88515bcc6d
include/Makefile: install all headers
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Mon, 27 May 2024 22:11:44 +0000 |
parents | 191d58f5c24f |
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rev | line source |
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1 /* |
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2 * The library function implemented in this C module provides a |
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3 * simple interface for obtaining a single RTP endpoint from |
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4 * themwi-rtp-mgr. This "simple client" option is suitable only |
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5 * for command line utilities, not for daemon processes! |
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6 */ |
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7 |
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8 #include <sys/types.h> |
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9 #include <sys/socket.h> |
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10 #include <sys/un.h> |
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11 #include <stdio.h> |
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12 #include <stdint.h> |
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13 #include <stdlib.h> |
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14 #include <string.h> |
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15 #include <strings.h> |
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16 |
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17 #include <themwi/rtp/rtp_alloc_if.h> |
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18 #include <themwi/rtp/rtp_alloc_resp.h> |
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19 #include <themwi/rtp/rtp_alloc_simple.h> |
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20 |
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21 static const char ctrl_socket_pathname[] = "/var/gsm/rtp_alloc_socket"; |
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22 |
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23 static void |
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24 fill_sockaddr_un(pathname, sunp, lenp) |
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25 char *pathname; |
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26 struct sockaddr_un *sunp; |
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27 unsigned *lenp; |
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28 { |
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29 /* local socket binding voodoo copied from osmocon */ |
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30 sunp->sun_family = AF_UNIX; |
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31 strncpy(sunp->sun_path, pathname, sizeof(sunp->sun_path)); |
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32 sunp->sun_path[sizeof(sunp->sun_path) - 1] = '\0'; |
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33 /* we use the same magic that X11 uses in Xtranssock.c for |
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34 * calculating the proper length of the sockaddr */ |
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35 #if defined(BSD44SOCKETS) || defined(__UNIXWARE__) |
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36 sunp->sun_len = strlen(sunp->sun_path); |
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37 #endif |
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38 #if defined(BSD44SOCKETS) || defined(SUN_LEN) |
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39 *lenp = SUN_LEN(sunp); |
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40 #else |
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41 *lenp = strlen(sunp->sun_path) + |
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42 offsetof(struct sockaddr_un, sun_path) + 1; |
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43 #endif |
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44 } |
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45 |
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46 static void |
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47 close_fds(resp) |
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48 struct rtp_alloc_resp_wrap *resp; |
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49 { |
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50 unsigned n; |
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51 |
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52 for (n = 0; n < resp->num_fd; n++) |
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53 close(resp->fd_buf[n]); |
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54 } |
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55 |
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56 int rtp_alloc_simple(int ep_type, struct rtp_alloc_simple *out) |
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57 { |
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58 struct sockaddr_un sa; |
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59 unsigned sa_len; |
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60 int ctrl_fd, rc; |
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61 struct rtp_alloc_req req; |
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62 struct rtp_alloc_resp_wrap resp; |
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63 unsigned expect_num_fd; |
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64 |
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65 switch (ep_type) { |
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66 case RTP_ALLOC_TYPE_GSM: |
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67 case RTP_ALLOC_TYPE_PSTN: |
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68 expect_num_fd = 2; |
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69 break; |
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70 case RTP_ALLOC_TYPE_GSM2PSTN: |
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71 case RTP_ALLOC_TYPE_GSM2GSM: |
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72 expect_num_fd = 4; |
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73 break; |
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74 default: |
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75 fprintf(stderr, |
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76 "rtp_alloc_simple() error: unknown EP type %d\n", |
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77 ep_type); |
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78 return(-1); |
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79 } |
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80 ctrl_fd = socket(AF_UNIX, SOCK_SEQPACKET, 0); |
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81 if (ctrl_fd < 0) { |
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82 perror("socket(AF_UNIX, SOCK_SEQPACKET, 0)"); |
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83 return(-1); |
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84 } |
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85 fill_sockaddr_un(ctrl_socket_pathname, &sa, &sa_len); |
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86 rc = connect(ctrl_fd, (struct sockaddr *) &sa, sa_len); |
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87 if (rc < 0) { |
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88 perror(ctrl_socket_pathname); |
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89 close(ctrl_fd); |
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90 return(-1); |
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91 } |
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92 bzero(&req, sizeof req); |
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93 req.ep_type = ep_type; |
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94 rc = send(ctrl_fd, &req, sizeof req, 0); |
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95 if (rc < 0) { |
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96 perror("send to RTP allocator socket"); |
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97 close(ctrl_fd); |
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98 return(-1); |
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99 } |
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100 rc = collect_rtpmgr_resp(ctrl_fd, 0, &resp); |
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101 if (rc < 0) { |
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102 perror("recvmsg from RTP allocator socket"); |
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103 close(ctrl_fd); |
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104 return(-1); |
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105 } |
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106 close(ctrl_fd); |
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107 if (resp.resp_len != sizeof(struct rtp_alloc_resp)) { |
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108 fprintf(stderr, |
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109 "error: response packet from themwi-rtp-mgr has wrong length (%u bytes)\n", |
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110 resp.resp_len); |
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111 close_fds(&resp); |
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112 return(-1); |
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113 } |
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114 if (resp.resp.res != RTP_ALLOC_OK) { |
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115 fprintf(stderr, "themwi-rtp-mgr returned error %u\n", |
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116 resp.resp.res); |
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117 close_fds(&resp); |
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118 return(-1); |
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119 } |
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120 if (resp.num_fd != expect_num_fd) { |
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121 fprintf(stderr, |
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122 "error: themwi-rtp-mgr returned %u descriptors instead of expected %u\n", |
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123 resp.num_fd, expect_num_fd); |
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124 close_fds(&resp); |
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125 return(-1); |
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126 } |
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127 switch (ep_type) { |
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128 case RTP_ALLOC_TYPE_GSM: |
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129 out->gsm_rtp_fd = resp.fd_buf[0]; |
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130 out->gsm_rtcp_fd = resp.fd_buf[1]; |
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131 break; |
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132 case RTP_ALLOC_TYPE_PSTN: |
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133 out->pstn_rtp_fd = resp.fd_buf[0]; |
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134 out->pstn_rtcp_fd = resp.fd_buf[1]; |
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135 break; |
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136 case RTP_ALLOC_TYPE_GSM2PSTN: |
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137 case RTP_ALLOC_TYPE_GSM2GSM: |
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138 out->gsm_rtp_fd = resp.fd_buf[0]; |
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139 out->gsm_rtcp_fd = resp.fd_buf[1]; |
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140 out->pstn_rtp_fd = resp.fd_buf[2]; |
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141 out->pstn_rtcp_fd = resp.fd_buf[3]; |
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142 } |
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143 bcopy(&resp.resp.gsm_addr, &out->gsm_addr, |
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144 sizeof(struct sockaddr_storage)); |
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145 bcopy(&resp.resp.pstn_addr, &out->pstn_addr, |
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146 sizeof(struct sockaddr_storage)); |
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147 return(0); |
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148 } |