1 | /* |
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2 | * Linux/C based server for TiVo Home Media Option protocol |
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3 | * |
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4 | * Based on version 1.5.1 of |
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5 | * "TiVo Connect Automatic Machine; Discovery Protocol Specification" |
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6 | * Based on version 1.1.0 of |
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7 | * "TiVo Home Media Option; Music and Photos Server Protocol Specification" |
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8 | * |
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9 | * Dave Clemans, April 2003 |
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10 | * |
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11 | * byRequest TiVo HMO Server |
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12 | * Copyright (C) 2003 Dave Clemans |
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13 | * |
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14 | * This file is based on byRequest, and is part of MiniDLNA. |
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15 | * |
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16 | * byRequest is free software; you can redistribute it and/or modify |
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17 | * it under the terms of the GNU General Public License as published by |
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18 | * the Free Software Foundation; either version 2 of the License, or |
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19 | * (at your option) any later version. |
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20 | * |
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21 | * byRequest is distributed in the hope that it will be useful, |
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22 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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23 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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24 | * GNU General Public License for more details. |
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25 | * |
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26 | * You should have received a copy of the GNU General Public License |
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27 | * along with byRequest. If not, see <http://www.gnu.org/licenses/>. |
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28 | */ |
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29 | #include "config.h" |
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30 | #ifdef TIVO_SUPPORT |
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31 | #include <stdlib.h> |
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32 | #include <stdio.h> |
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33 | #include <unistd.h> |
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34 | #include <string.h> |
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35 | #include <sys/wait.h> |
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36 | #include <sys/ioctl.h> |
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37 | #include <sys/stat.h> |
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38 | #include <fcntl.h> |
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39 | #include <errno.h> |
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40 | #include <time.h> |
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41 | |
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42 | #include <sys/param.h> |
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43 | #include <sys/socket.h> |
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44 | #include <netinet/in.h> |
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45 | #include <arpa/inet.h> |
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46 | #include <net/if.h> |
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47 | #include <sys/poll.h> |
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48 | #include <netdb.h> |
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49 | |
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50 | #include "tivo_beacon.h" |
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51 | #include "upnpglobalvars.h" |
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52 | #include "log.h" |
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53 | |
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54 | /* OpenAndConfHTTPSocket() : |
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55 | * setup the socket used to handle incoming HTTP connections. */ |
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56 | int |
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57 | OpenAndConfTivoBeaconSocket() |
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58 | { |
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59 | int s; |
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60 | int i = 1; |
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61 | struct sockaddr_in beacon; |
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62 | |
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63 | if( (s = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) |
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64 | { |
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65 | DPRINTF(E_ERROR, L_TIVO, "socket(http): %s\n", strerror(errno)); |
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66 | return -1; |
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67 | } |
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68 | |
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69 | if(setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &i, sizeof(i)) < 0) |
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70 | { |
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71 | DPRINTF(E_WARN, L_TIVO, "setsockopt(http, SO_REUSEADDR): %s\n", strerror(errno)); |
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72 | } |
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73 | |
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74 | memset(&beacon, 0, sizeof(struct sockaddr_in)); |
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75 | beacon.sin_family = AF_INET; |
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76 | beacon.sin_port = htons(2190); |
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77 | beacon.sin_addr.s_addr = htonl(INADDR_ANY); |
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78 | |
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79 | if(bind(s, (struct sockaddr *)&beacon, sizeof(struct sockaddr_in)) < 0) |
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80 | { |
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81 | DPRINTF(E_ERROR, L_TIVO, "bind(http): %s\n", strerror(errno)); |
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82 | close(s); |
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83 | return -1; |
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84 | } |
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85 | i = 1; |
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86 | if(setsockopt(s, SOL_SOCKET, SO_BROADCAST, &i, sizeof(i)) < 0 ) |
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87 | { |
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88 | DPRINTF(E_WARN, L_TIVO, "setsockopt(http, SO_BROADCAST): %s\n", strerror(errno)); |
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89 | close(s); |
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90 | return -1; |
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91 | } |
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92 | |
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93 | return s; |
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94 | } |
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95 | |
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96 | /* |
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97 | * Returns the interface broadcast address to be used for beacons |
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98 | */ |
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99 | uint32_t |
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100 | getBcastAddress(void) |
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101 | { |
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102 | int i, rval; |
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103 | int s; |
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104 | struct sockaddr_in sin; |
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105 | struct sockaddr_in addr; |
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106 | struct ifreq ifr[16]; |
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107 | struct ifconf ifc; |
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108 | int count = 0; |
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109 | uint32_t ret = INADDR_BROADCAST; |
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110 | |
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111 | s = socket(PF_INET, SOCK_STREAM, 0); |
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112 | memset(&ifc, '\0', sizeof(ifc)); |
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113 | ifc.ifc_len = sizeof(ifr); |
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114 | ifc.ifc_req = ifr; |
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115 | |
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116 | if(ioctl(s, SIOCGIFCONF, &ifc) < 0) { |
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117 | DPRINTF(E_ERROR, L_TIVO, "Error getting interface list [%s]\n", strerror(errno)); |
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118 | close(s); |
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119 | return ret; |
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120 | } |
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121 | |
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122 | count = ifc.ifc_len / sizeof(struct ifreq); |
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123 | for(i = 0; i < count; i++) |
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124 | { |
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125 | memcpy(&addr, &ifr[i].ifr_addr, sizeof(addr)); |
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126 | if(strcmp(inet_ntoa(addr.sin_addr), lan_addr[0].str) == 0) |
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127 | { |
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128 | rval = ioctl(s, SIOCGIFBRDADDR, &ifr[i]); |
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129 | if( rval < 0 ) |
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130 | { |
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131 | DPRINTF(E_ERROR, L_TIVO, "Failed to get broadcast addr on %s [%s]\n", ifr[i].ifr_name, strerror(errno)); |
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132 | break; |
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133 | } |
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134 | memcpy(&sin, &ifr[i].ifr_broadaddr, sizeof(sin)); |
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135 | DPRINTF(E_DEBUG, L_TIVO, "Interface: %s broadcast addr %s\n", ifr[i].ifr_name, inet_ntoa(sin.sin_addr)); |
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136 | ret = ntohl((uint32_t)(sin.sin_addr.s_addr)); |
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137 | break; |
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138 | } |
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139 | } |
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140 | close(s); |
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141 | |
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142 | return ret; |
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143 | } |
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144 | |
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145 | /* |
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146 | * Send outgoing beacon to the specified address |
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147 | * This will either be a specific or broadcast address |
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148 | */ |
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149 | void |
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150 | sendBeaconMessage(int fd, struct sockaddr_in * client, int len, int broadcast) |
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151 | { |
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152 | char * mesg; |
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153 | int mesg_len; |
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154 | |
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155 | mesg_len = asprintf(&mesg, "TiVoConnect=1\n" |
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156 | "swversion=1.0\n" |
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157 | "method=%s\n" |
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158 | "identity=%s\n" |
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159 | "machine=%s\n" |
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160 | "platform=pc/minidlna\n" |
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161 | "services=TiVoMediaServer:%d/http\n", |
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162 | broadcast ? "broadcast" : "connected", |
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163 | uuidvalue, friendly_name, runtime_vars.port); |
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164 | DPRINTF(E_DEBUG, L_TIVO, "Sending TiVo beacon to %s\n", inet_ntoa(client->sin_addr)); |
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165 | sendto(fd, mesg, mesg_len, 0, (struct sockaddr*)client, len); |
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166 | free(mesg); |
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167 | } |
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168 | |
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169 | /* |
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170 | * Parse and save a received beacon packet from another server, or from |
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171 | * a TiVo. |
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172 | * |
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173 | * Returns true if this was a broadcast beacon msg |
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174 | */ |
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175 | int |
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176 | rcvBeaconMessage(char * beacon) |
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177 | { |
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178 | char * tivoConnect = NULL; |
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179 | char * method = NULL; |
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180 | char * identity = NULL; |
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181 | char * machine = NULL; |
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182 | char * platform = NULL; |
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183 | char * services = NULL; |
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184 | char * cp; |
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185 | char * scp; |
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186 | char * tokptr; |
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187 | |
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188 | cp = strtok_r(beacon, "=\r\n", &tokptr); |
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189 | while( cp != NULL ) |
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190 | { |
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191 | scp = cp; |
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192 | cp = strtok_r( NULL, "=\r\n", &tokptr ); |
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193 | if( strcasecmp(scp, "tivoconnect") == 0 ) |
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194 | tivoConnect = cp; |
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195 | else if( strcasecmp(scp, "method") == 0 ) |
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196 | method = cp; |
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197 | else if( strcasecmp(scp, "identity") == 0 ) |
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198 | identity = cp; |
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199 | else if( strcasecmp(scp, "machine") == 0 ) |
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200 | machine = cp; |
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201 | else if( strcasecmp(scp, "platform") == 0 ) |
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202 | platform = cp; |
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203 | else if( strcasecmp(scp, "services") == 0 ) |
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204 | services = cp; |
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205 | cp = strtok_r(NULL, "=\r\n", &tokptr); |
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206 | } |
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207 | |
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208 | if( tivoConnect == NULL ) |
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209 | return 0; |
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210 | |
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211 | #ifdef DEBUG |
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212 | static struct aBeacon* topBeacon = NULL; |
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213 | struct aBeacon * b; |
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214 | time_t current; |
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215 | int len; |
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216 | char buf[32]; |
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217 | static time_t lastSummary = 0; |
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218 | |
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219 | current = time(NULL); |
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220 | for( b = topBeacon; b != NULL; b = b->next ) |
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221 | { |
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222 | if( strcasecmp(machine, b->machine) == 0 || |
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223 | strcasecmp(identity, b->identity) == 0 ) |
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224 | break; |
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225 | } |
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226 | if( b == NULL ) |
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227 | { |
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228 | b = calloc(1, sizeof(*b)); |
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229 | |
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230 | if( machine ) |
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231 | b->machine = strdup(machine); |
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232 | if( identity ) |
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233 | b->identity = strdup(identity); |
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234 | |
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235 | b->next = topBeacon; |
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236 | topBeacon = b; |
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237 | |
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238 | DPRINTF(E_DEBUG, L_TIVO, "Received new beacon: machine(%s) platform(%s) services(%s)\n", |
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239 | machine ? machine : "-", |
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240 | platform ? platform : "-", |
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241 | services ? services : "-" ); |
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242 | } |
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243 | |
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244 | b->lastSeen = current; |
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245 | if( !lastSummary ) |
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246 | lastSummary = current; |
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247 | |
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248 | if( lastSummary + 1800 < current ) |
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249 | { /* Give a summary of received server beacons every half hour or so */ |
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250 | len = 0; |
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251 | for( b = topBeacon; b != NULL; b = b->next ) |
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252 | { |
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253 | len += strlen(b->machine) + 32; |
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254 | } |
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255 | scp = malloc(len + 128); |
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256 | strcpy( scp, "Known servers: " ); |
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257 | for( b = topBeacon; b != NULL; b = b->next ) |
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258 | { |
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259 | strcat(scp, b->machine); |
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260 | sprintf(buf, "(%ld)", current - b->lastSeen); |
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261 | strcat(scp, buf); |
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262 | if( b->next != NULL ) |
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263 | strcat(scp, ","); |
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264 | } |
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265 | strcat(scp, "\n"); |
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266 | DPRINTF(E_DEBUG, L_TIVO, "%s\n", scp); |
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267 | free(scp); |
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268 | lastSummary = current; |
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269 | } |
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270 | #endif |
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271 | /* It's pointless to respond to a non-TiVo beacon. */ |
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272 | if( strncmp(platform, "tcd/", 4) != 0 ) |
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273 | return 0; |
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274 | |
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275 | if( strcasecmp(method, "broadcast") == 0 ) |
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276 | { |
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277 | DPRINTF(E_DEBUG, L_TIVO, "Received new beacon: machine(%s) platform(%s) services(%s)\n", |
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278 | machine ? machine : "-", |
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279 | platform ? platform : "-", |
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280 | services ? services : "-" ); |
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281 | return 1; |
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282 | } |
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283 | return 0; |
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284 | } |
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285 | |
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286 | void ProcessTiVoBeacon(int s) |
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287 | { |
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288 | int n; |
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289 | char *cp; |
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290 | struct sockaddr_in sendername; |
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291 | socklen_t len_r; |
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292 | char bufr[1500]; |
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293 | len_r = sizeof(struct sockaddr_in); |
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294 | |
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295 | /* We only expect to see beacon msgs from TiVo's and possibly other tivo servers */ |
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296 | n = recvfrom(s, bufr, sizeof(bufr), 0, |
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297 | (struct sockaddr *)&sendername, &len_r); |
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298 | if( n > 0 ) |
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299 | bufr[n] = '\0'; |
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300 | |
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301 | /* find which subnet the client is in */ |
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302 | for(n = 0; n<n_lan_addr; n++) |
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303 | { |
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304 | if( (sendername.sin_addr.s_addr & lan_addr[n].mask.s_addr) |
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305 | == (lan_addr[n].addr.s_addr & lan_addr[n].mask.s_addr)) |
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306 | break; |
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307 | } |
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308 | if( n == n_lan_addr ) |
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309 | { |
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310 | DPRINTF(E_DEBUG, L_TIVO, "Ignoring TiVo beacon on other interface [%s]\n", |
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311 | inet_ntoa(sendername.sin_addr)); |
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312 | return; |
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313 | } |
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314 | |
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315 | for( cp = bufr; *cp; cp++ ) |
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316 | /* do nothing */; |
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317 | if( cp[-1] == '\r' || cp[-1] == '\n' ) |
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318 | *--cp = '\0'; |
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319 | if( cp[-1] == '\r' || cp[-1] == '\n' ) |
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320 | *--cp = '\0'; |
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321 | |
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322 | if( rcvBeaconMessage(bufr) ) |
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323 | sendBeaconMessage(s, &sendername, len_r, 0); |
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324 | } |
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325 | #endif // TIVO_SUPPORT |
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