XMMS2
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00001 /* XMMS2 - X Music Multiplexer System 00002 * Copyright (C) 2003-2009 XMMS2 Team 00003 * 00004 * PLUGINS ARE NOT CONSIDERED TO BE DERIVED WORK !!! 00005 * 00006 * This library is free software; you can redistribute it and/or 00007 * modify it under the terms of the GNU Lesser General Public 00008 * License as published by the Free Software Foundation; either 00009 * version 2.1 of the License, or (at your option) any later version. 00010 * 00011 * This library is distributed in the hope that it will be useful, 00012 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00014 * Lesser General Public License for more details. 00015 */ 00016 00017 #include <stdlib.h> 00018 #include "common.h" 00019 00020 static gboolean 00021 udpwatcher (GIOChannel *src, GIOCondition cond, xmms_visualization_t *vis) 00022 { 00023 struct sockaddr_storage from; 00024 socklen_t sl = sizeof (from); 00025 xmmsc_vis_udp_timing_t packet_d; 00026 char* packet = packet_init_timing (&packet_d); 00027 if ((recvfrom (vis->socket, packet, packet_d.size, 0, (struct sockaddr *)&from, &sl)) > 0) { 00028 if (*packet_d.__unaligned_type == 'H') { 00029 xmms_vis_client_t *c; 00030 int32_t id; 00031 00032 XMMSC_VIS_UNALIGNED_READ (id, packet_d.__unaligned_id, int32_t); 00033 id = ntohl (id); 00034 00035 /* debug code starts 00036 char adrb[INET6_ADDRSTRLEN]; 00037 struct sockaddr_in6 *a = (struct sockaddr_in6 *)&from; 00038 printf ("Client address: %s:%d, %d\n", inet_ntop (AF_INET6, &a->sin6_addr, 00039 adrb, INET6_ADDRSTRLEN), a->sin6_port, id); 00040 debug code ends */ 00041 g_mutex_lock (vis->clientlock); 00042 c = get_client (id); 00043 if (!c || c->type != VIS_UDP) { 00044 g_mutex_unlock (vis->clientlock); 00045 return TRUE; 00046 } 00047 /* save client address according to id */ 00048 memcpy (&c->transport.udp.addr, &from, sizeof (from)); 00049 c->transport.udp.socket[0] = 1; 00050 c->transport.udp.grace = 2000; 00051 g_mutex_unlock (vis->clientlock); 00052 } else if (*packet_d.__unaligned_type == 'T') { 00053 struct timeval time; 00054 xmms_vis_client_t *c; 00055 int32_t id; 00056 00057 XMMSC_VIS_UNALIGNED_READ (id, packet_d.__unaligned_id, int32_t); 00058 id = ntohl (id); 00059 00060 g_mutex_lock (vis->clientlock); 00061 c = get_client (id); 00062 if (!c || c->type != VIS_UDP) { 00063 g_mutex_unlock (vis->clientlock); 00064 free (packet); 00065 return TRUE; 00066 } 00067 c->transport.udp.grace = 2000; 00068 g_mutex_unlock (vis->clientlock); 00069 00070 /* give pong */ 00071 gettimeofday (&time, NULL); 00072 00073 struct timeval cts, sts; 00074 00075 XMMSC_VIS_UNALIGNED_READ (cts.tv_sec, &packet_d.__unaligned_clientstamp[0], int32_t); 00076 XMMSC_VIS_UNALIGNED_READ (cts.tv_usec, &packet_d.__unaligned_clientstamp[1], int32_t); 00077 cts.tv_sec = ntohl (cts.tv_sec); 00078 cts.tv_usec = ntohl (cts.tv_usec); 00079 00080 sts.tv_sec = time.tv_sec - cts.tv_sec; 00081 sts.tv_usec = time.tv_usec - cts.tv_usec; 00082 if (sts.tv_usec < 0) { 00083 sts.tv_sec--; 00084 sts.tv_usec += 1000000; 00085 } 00086 00087 XMMSC_VIS_UNALIGNED_WRITE (&packet_d.__unaligned_serverstamp[0], 00088 (int32_t)htonl (sts.tv_sec), int32_t); 00089 XMMSC_VIS_UNALIGNED_WRITE (&packet_d.__unaligned_serverstamp[1], 00090 (int32_t)htonl (sts.tv_usec), int32_t); 00091 00092 sendto (vis->socket, packet, packet_d.size, 0, (struct sockaddr *)&from, sl); 00093 00094 /* new debug: 00095 printf ("Timings: local %f, remote %f, diff %f\n", tv2ts (&time), net2ts (packet_d.clientstamp), net2ts (packet_d.clientstamp) - tv2ts (&time)); 00096 ends */ 00097 } else { 00098 xmms_log_error ("Received invalid UDP package!"); 00099 } 00100 } 00101 free (packet); 00102 return TRUE; 00103 } 00104 00105 int32_t 00106 init_udp (xmms_visualization_t *vis, int32_t id, xmms_error_t *err) 00107 { 00108 // TODO: we need the currently used port, not only the default one! */ 00109 int32_t port = XMMS_DEFAULT_TCP_PORT; 00110 xmms_vis_client_t *c; 00111 00112 // setup socket if needed 00113 if (!xmms_socket_valid (vis->socket)) { 00114 struct addrinfo hints; 00115 struct addrinfo *result, *rp; 00116 int s; 00117 00118 memset (&hints, 0, sizeof (hints)); 00119 hints.ai_family = AF_UNSPEC; 00120 hints.ai_socktype = SOCK_DGRAM; 00121 hints.ai_flags = AI_PASSIVE; 00122 hints.ai_protocol = 0; 00123 00124 if ((s = getaddrinfo (NULL, G_STRINGIFY (XMMS_DEFAULT_TCP_PORT), &hints, &result)) != 0) 00125 { 00126 xmms_log_error ("Could not setup socket! getaddrinfo: %s", gai_strerror (s)); 00127 xmms_error_set (err, XMMS_ERROR_NO_SAUSAGE, "Could not setup socket!"); 00128 return -1; 00129 } 00130 00131 for (rp = result; rp != NULL; rp = rp->ai_next) { 00132 vis->socket = socket (rp->ai_family, rp->ai_socktype, rp->ai_protocol); 00133 if (!xmms_socket_valid (vis->socket)) { 00134 continue; 00135 } 00136 if (bind (vis->socket, rp->ai_addr, rp->ai_addrlen) != -1) { 00137 break; 00138 } else { 00139 close (vis->socket); 00140 } 00141 } 00142 if (rp == NULL) { 00143 xmms_log_error ("Could not bind socket!"); 00144 xmms_error_set (err, XMMS_ERROR_NO_SAUSAGE, "Could not bind socket!"); 00145 freeaddrinfo (result); 00146 return -1; 00147 } 00148 freeaddrinfo (result); 00149 00150 /* register into mainloop: */ 00151 /* perhaps needed, perhaps not .. #ifdef __WIN32__ 00152 vis->socketio = g_io_channel_win32_new_socket (vis->socket); 00153 #else */ 00154 vis->socketio = g_io_channel_unix_new (vis->socket); 00155 /*#endif */ 00156 g_io_channel_set_encoding (vis->socketio, NULL, NULL); 00157 g_io_channel_set_buffered (vis->socketio, FALSE); 00158 g_io_add_watch (vis->socketio, G_IO_IN, (GIOFunc) udpwatcher, vis); 00159 } 00160 00161 /* set up client structure */ 00162 x_fetch_client (id); 00163 c->type = VIS_UDP; 00164 memset (&c->transport.udp.addr, 0, sizeof (c->transport.udp.addr)); 00165 c->transport.udp.socket[0] = 0; 00166 x_release_client (); 00167 00168 xmms_log_info ("Visualization client %d initialised using UDP", id); 00169 return port; 00170 } 00171 00172 void 00173 cleanup_udp (xmmsc_vis_udp_t *t, xmms_socket_t socket) 00174 { 00175 socklen_t sl = sizeof (t->addr); 00176 char packet = 'K'; 00177 sendto (socket, &packet, 1, 0, (struct sockaddr *)&t->addr, sl); 00178 } 00179 00180 gboolean 00181 write_udp (xmmsc_vis_udp_t *t, xmms_vis_client_t *c, int32_t id, struct timeval *time, int channels, int size, short *buf, int socket) 00182 { 00183 xmmsc_vis_udp_data_t packet_d; 00184 xmmsc_vischunk_t *__unaligned_dest; 00185 short res; 00186 int offset; 00187 char* packet; 00188 00189 /* first check if the client is still there */ 00190 if (t->grace == 0) { 00191 delete_client (id); 00192 return FALSE; 00193 } 00194 if (t->socket == 0) { 00195 return FALSE; 00196 } 00197 00198 packet = packet_init_data (&packet_d); 00199 t->grace--; 00200 XMMSC_VIS_UNALIGNED_WRITE (packet_d.__unaligned_grace, htons (t->grace), uint16_t); 00201 __unaligned_dest = packet_d.__unaligned_data; 00202 00203 XMMSC_VIS_UNALIGNED_WRITE (&__unaligned_dest->timestamp[0], 00204 (int32_t)htonl (time->tv_sec), int32_t); 00205 XMMSC_VIS_UNALIGNED_WRITE (&__unaligned_dest->timestamp[1], 00206 (int32_t)htonl (time->tv_usec), int32_t); 00207 00208 00209 XMMSC_VIS_UNALIGNED_WRITE (&__unaligned_dest->format, (uint16_t)htons (c->format), uint16_t); 00210 res = fill_buffer (__unaligned_dest->data, &c->prop, channels, size, buf); 00211 XMMSC_VIS_UNALIGNED_WRITE (&__unaligned_dest->size, (uint16_t)htons (res), uint16_t); 00212 00213 offset = ((char*)&__unaligned_dest->data - (char*)__unaligned_dest); 00214 00215 sendto (socket, packet, XMMS_VISPACKET_UDP_OFFSET + offset + res * sizeof (int16_t), 0, (struct sockaddr *)&t->addr, sizeof (t->addr)); 00216 free (packet); 00217 00218 00219 return TRUE; 00220 }