TOOLS/netstream.c

   1 /*
   2  * Copyright (C) Alban Bedel - 04/2003
   3  *
   4  * This file is part of MPlayer.
   5  *
   6  * MPlayer is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * MPlayer is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19  */
  20
  21 #include <stdlib.h>
  22 #include <stdio.h>
  23 #include <unistd.h>
  24 #include <inttypes.h>
  25 #include <errno.h>
  26 #include <signal.h>
  27 #include <sys/types.h>
  28
  29 #include "config.h"
  30
  31 #if !HAVE_WINSOCK2_H
  32 #include <sys/socket.h>
  33 #include <netinet/in.h>
  34 #include <arpa/inet.h>
  35 #else
  36 #include <winsock2.h>
  37 #include <ws2tcpip.h>
  38 #endif
  39
  40 #include "stream/stream.h"
  41 #include "libmpdemux/demuxer.h"
  42 #include "mp_msg.h"
  43 #include "libavutil/common.h"
  44 #include "mpbswap.h"
  45
  46 /// Netstream packets def and some helpers
  47 #include "stream/stream_netstream.h"
  48
  49 // linking hacks
  50 char *info_name;
  51 char *info_artist;
  52 char *info_genre;
  53 char *info_subject;
  54 char *info_copyright;
  55 char *info_sourceform;
  56 char *info_comment;
  57
  58 char* out_filename = NULL;
  59 char* force_fourcc=NULL;
  60 char* passtmpfile="divx2pass.log";
  61
  62 static unsigned short int port = 10000;
  63
  64 typedef struct client_st client_t;
  65 struct client_st {
  66   int fd;
  67   stream_t* stream;
  68   client_t* next;
  69   client_t* prev;
  70 };
  71
  72 static int write_error(int fd,char* msg) {
  73   int len = strlen(msg) + 1;
  74   return write_packet(fd,NET_STREAM_ERROR,msg,len);
  75 }
  76
  77 static int net_stream_open(client_t* cl,char* url) {
  78   int file_format=DEMUXER_TYPE_UNKNOWN;
  79   mp_net_stream_opened_t ret;
  80
  81   if(cl->stream) {
  82     if(!write_error(cl->fd,"A stream is currently opened\n"))
  83       return 0;
  84     return 1;
  85   }
  86
  87   mp_msg(MSGT_NETST,MSGL_V,"Open stream %s\n",url);
  88   cl->stream = open_stream(url,NULL,&file_format);
  89   if(!cl->stream) {
  90     if(!write_error(cl->fd,"Open failed\n"))
  91       return 0;
  92     return 1;
  93   }
  94   stream_reset(cl->stream);
  95   stream_seek(cl->stream,cl->stream->start_pos);
  96   ret.file_format = file_format;
  97   ret.flags = cl->stream->flags;
  98   ret.sector_size = cl->stream->sector_size;
  99   ret.start_pos = cl->stream->start_pos;
 100   ret.end_pos = cl->stream->end_pos;
 101   net_stream_opened_2_me(&ret);
 102
 103   if(!write_packet(cl->fd,NET_STREAM_OK,(char*)&ret,sizeof(mp_net_stream_opened_t)))
 104     return 0;
 105   return 1;
 106 }
 107
 108 static int net_stream_fill_buffer(client_t* cl,uint16_t max_len) {
 109   int r;
 110   mp_net_stream_packet_t *pack;
 111
 112   if(!cl->stream) {
 113     if(!write_error(cl->fd,"No stream is currently opened\n"))
 114       return 0;
 115     return 1;
 116   }
 117   if(max_len == 0) {
 118     if(!write_error(cl->fd,"Fill buffer called with 0 length\n"))
 119       return 0;
 120     return 1;
 121   }
 122   pack = malloc(max_len + sizeof(mp_net_stream_packet_t));
 123   pack->cmd = NET_STREAM_OK;
 124   r = stream_read(cl->stream,pack->data,max_len);
 125   pack->len = le2me_16(r + sizeof(mp_net_stream_packet_t));
 126   if(!net_write(cl->fd,(char*)pack,le2me_16(pack->len))) {
 127     free(pack);
 128     return 0;
 129   }
 130   free(pack);
 131   return 1;
 132 }
 133
 134 static int net_stream_seek(client_t* cl, uint64_t pos) {
 135
 136   if(!cl->stream) {
 137     if(!write_error(cl->fd,"No stream is currently opened\n"))
 138       return 0;
 139     return 1;
 140   }
 141
 142   if(!stream_seek(cl->stream,(off_t)pos)) {
 143     if(!write_error(cl->fd,"Seek failed\n"))
 144       return 0;
 145     return 1;
 146   }
 147   if(!write_packet(cl->fd,NET_STREAM_OK,NULL,0))
 148     return 0;
 149   return 1;
 150 }
 151
 152 static int net_stream_reset(client_t* cl) {
 153   if(!cl->stream) {
 154     if(!write_error(cl->fd,"No stream is currently opened\n"))
 155       return 0;
 156     return 1;
 157   }
 158   stream_reset(cl->stream);
 159   if(!write_packet(cl->fd,NET_STREAM_OK,NULL,0))
 160     return 0;
 161   return 1;
 162 }
 163
 164 static int net_stream_close(client_t* cl) {
 165   if(!cl->stream) {
 166     if(!write_error(cl->fd,"No stream is currently opened\n"))
 167       return 0;
 168     return 1;
 169   }
 170
 171   free_stream(cl->stream);
 172   cl->stream = NULL;
 173
 174   if(!write_packet(cl->fd,NET_STREAM_OK,NULL,0))
 175     return 0;
 176   return 1;
 177 }
 178
 179 static int handle_client(client_t* cl,mp_net_stream_packet_t* pack) {
 180
 181   if(!pack)
 182     return 0;
 183
 184   switch(pack->cmd) {
 185   case NET_STREAM_OPEN:
 186     if(((char*)pack)[pack->len-1] != '\0') {
 187       mp_msg(MSGT_NETST,MSGL_WARN,"Got invalid open packet\n");
 188       return 0;
 189     }
 190     return net_stream_open(cl,pack->data);
 191   case NET_STREAM_FILL_BUFFER:
 192     if(pack->len != sizeof(mp_net_stream_packet_t) + 2) {
 193       mp_msg(MSGT_NETST,MSGL_WARN,"Got invalid fill buffer packet\n");
 194       return 0;
 195     }
 196     return net_stream_fill_buffer(cl,le2me_16(*((uint16_t*)pack->data)));
 197   case NET_STREAM_SEEK:
 198     if(pack->len != sizeof(mp_net_stream_packet_t) + 8) {
 199       mp_msg(MSGT_NETST,MSGL_WARN,"Got invalid fill buffer packet\n");
 200       return 0;
 201     }
 202     return net_stream_seek(cl,le2me_64(*((uint64_t*)pack->data)));
 203   case NET_STREAM_RESET:
 204     return net_stream_reset(cl);
 205   case NET_STREAM_CLOSE:
 206     if(pack->len != sizeof(mp_net_stream_packet_t)){
 207       mp_msg(MSGT_NETST,MSGL_WARN,"Got invalid fill buffer packet\n");
 208       return 0;
 209     }
 210     return net_stream_close(cl);
 211   default:
 212     mp_msg(MSGT_NETST,MSGL_WARN,"Got unknown command %d\n",pack->cmd);
 213     if(!write_error(cl->fd,"Unknown command\n"))
 214       return 0;
 215   }
 216   return 0;
 217 }
 218
 219 static client_t* add_client(client_t *head,int fd) {
 220   client_t *new = calloc(1,sizeof(client_t));
 221   new->fd = fd;
 222   if(!head) return new;
 223   new->next = head;
 224   head->prev = new;
 225   return new;
 226 }
 227
 228 static int make_fd_set(fd_set* fds, client_t** _cl, int listen) {
 229   int max_fd = listen;
 230   client_t *cl = *_cl;
 231   FD_ZERO(fds);
 232   FD_SET(listen,fds);
 233   while(cl) {
 234     // Remove this client
 235     if(cl->fd < 0) {
 236       client_t* f = cl;
 237       if(cl->prev) cl->prev->next = cl->next;
 238       if(cl->next) cl->next->prev = cl->prev;
 239       if(cl->stream) free_stream(cl->stream);
 240       if(!cl->prev) // Remove the head
 241         *_cl = cl->next;
 242       cl = cl->next;
 243       free(f);
 244       continue;
 245     }
 246     FD_SET(cl->fd,fds);
 247     if(cl->fd > max_fd) max_fd = cl->fd;
 248     cl = cl->next;
 249   }
 250   return max_fd+1;
 251 }
 252
 253 /// Hack to 'cleanly' exit
 254 static int run_server = 1;
 255
 256 void exit_sig(int sig) {
 257   static int count = 0;
 258   sig++; // gcc warning
 259   count++;
 260   if(count==3) exit(1);
 261   if(count > 3)
 262 #ifdef __MINGW32__
 263     WSACleanup();
 264 #else
 265     kill(getpid(),SIGKILL);
 266 #endif
 267   run_server = 0;
 268 }
 269
 270 static int main_loop(int listen_fd) {
 271   client_t *clients = NULL,*iter;
 272   fd_set fds;
 273
 274   signal(SIGTERM,exit_sig); // kill
 275 #ifndef __MINGW32__
 276   signal(SIGHUP,exit_sig);  // kill -HUP  /  xterm closed
 277   signal(SIGINT,exit_sig);  // Interrupt from keyboard
 278   signal(SIGQUIT,exit_sig); // Quit from keyboard
 279 #endif
 280
 281   while(run_server) {
 282     int sel_n = make_fd_set(&fds,&clients,listen_fd);
 283     int n = select(sel_n,&fds,NULL,NULL,NULL);
 284     if(n < 0) {
 285       if(errno == EINTR)
 286         continue;
 287       mp_msg(MSGT_NETST,MSGL_FATAL,"Select error: %s\n",strerror(errno));
 288       return 1;
 289     }
 290     // New connection
 291     if(FD_ISSET(listen_fd,&fds)) {
 292       struct sockaddr_in addr;
 293       socklen_t slen = sizeof(struct sockaddr_in);
 294       int client_fd = accept(listen_fd,(struct sockaddr*)&addr,&slen);
 295       if(client_fd < 0) {
 296         mp_msg(MSGT_NETST,MSGL_ERR,"accept failed: %s\n",strerror(errno));
 297         continue;
 298       }
 299       mp_msg(MSGT_NETST,MSGL_V,"New client from %s\n",inet_ntoa(addr.sin_addr));
 300       clients = add_client(clients,client_fd);
 301       if(n == 1) continue;
 302     }
 303     // Look for the clients
 304     for(iter = clients ; iter ; iter = iter->next) {
 305       mp_net_stream_packet_t* pack;
 306       if(!FD_ISSET(iter->fd,&fds)) continue;
 307       pack = read_packet(iter->fd);
 308       if(!pack) {
 309         close(iter->fd);
 310         iter->fd = -1;
 311         continue;
 312       }
 313       if(!handle_client(iter,pack)) {
 314         close(iter->fd);
 315         iter->fd = -1;
 316       }
 317       free(pack);
 318     }
 319   }
 320   mp_msg(MSGT_NETST,MSGL_INFO,"Exit ....\n");
 321   close(listen_fd);
 322 #ifdef __MINGW32__
 323   WSACleanup();
 324 #endif
 325   while(clients) {
 326     client_t* f = clients;
 327     if(f->stream) free_stream(f->stream);
 328     if(f->fd > 0) close(f->fd);
 329     free(f);
 330     clients = clients->next;
 331   }
 332   return 0;
 333 }
 334
 335 int main(void) {
 336   int listen_fd;
 337   struct sockaddr_in addr;
 338
 339   mp_msg_init();
 340   //  mp_msg_set_level(verbose+MSGL_STATUS);
 341
 342 #ifdef __MINGW32__
 343   WSADATA wsaData;
 344   WSAStartup(MAKEWORD(1,1), &wsaData);
 345 #endif
 346   listen_fd = socket(AF_INET, SOCK_STREAM, 0);
 347   if(listen_fd < 0) {
 348     mp_msg(MSGT_NETST,MSGL_FATAL,"Failed to create listen_fd: %s\n",strerror(errno));
 349     return -1;
 350   }
 351   memset(&addr,0,sizeof(struct sockaddr));
 352   addr.sin_addr.s_addr = INADDR_ANY;
 353   addr.sin_port = htons(port);
 354   addr.sin_family = AF_INET;
 355   if(bind(listen_fd,(struct sockaddr*)&addr,sizeof(struct sockaddr))) {
 356     mp_msg(MSGT_NETST,MSGL_FATAL,"Failed to bind listen socket: %s\n",strerror(errno));
 357     return -1;
 358   }
 359
 360
 361   if(listen(listen_fd,1)) {
 362     mp_msg(MSGT_NETST,MSGL_FATAL,"Failed to turn the socket in listen state: %s\n",strerror(errno));
 363     return -1;
 364   }
 365   return main_loop(listen_fd);
 366 }