summaryrefslogtreecommitdiffstats
path: root/TOOLS/netstream.c
blob: 8bc09b9a9d79297281b246686191c8bd71780701 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
/*
 * Copyright (C) Alban Bedel - 04/2003
 *
 * This file is part of MPlayer.
 *
 * MPlayer is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * MPlayer is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with MPlayer; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <inttypes.h>
#include <errno.h>
#include <signal.h>
#include <sys/types.h>

#include "config.h"

#ifndef HAVE_WINSOCK2_H
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#else
#include <winsock2.h>
#include <ws2tcpip.h>
#endif

#include "stream/stream.h"
#include "libmpdemux/demuxer.h"
#include "mp_msg.h"
#include "libavutil/common.h"
#include "mpbswap.h"

/// Netstream packets def and some helpers
#include "stream/stream_netstream.h"

// linking hacks
char *info_name;
char *info_artist;
char *info_genre;
char *info_subject;
char *info_copyright;
char *info_sourceform;
char *info_comment;

char* out_filename = NULL;
char* force_fourcc=NULL;
char* passtmpfile="divx2pass.log";

static unsigned short int port = 10000;

typedef struct client_st client_t;
struct client_st {
  int fd;
  stream_t* stream;
  client_t* next;
  client_t* prev;
};

static int write_error(int fd,char* msg) {
  int len = strlen(msg) + 1;
  return write_packet(fd,NET_STREAM_ERROR,msg,len);
}

static int net_stream_open(client_t* cl,char* url) {
  int file_format=DEMUXER_TYPE_UNKNOWN;
  mp_net_stream_opened_t ret;

  if(cl->stream) {
    if(!write_error(cl->fd,"A stream is currently opened\n"))
      return 0;
    return 1;
  }

  mp_msg(MSGT_NETST,MSGL_V,"Open stream %s\n",url);
  cl->stream = open_stream(url,NULL,&file_format);
  if(!cl->stream) {
    if(!write_error(cl->fd,"Open failed\n"))
      return 0;
    return 1;
  }
  stream_reset(cl->stream);
  stream_seek(cl->stream,cl->stream->start_pos);
  ret.file_format = file_format;
  ret.flags = cl->stream->flags;
  ret.sector_size = cl->stream->sector_size;
  ret.start_pos = cl->stream->start_pos;
  ret.end_pos = cl->stream->end_pos;
  net_stream_opened_2_me(&ret);

  if(!write_packet(cl->fd,NET_STREAM_OK,(char*)&ret,sizeof(mp_net_stream_opened_t)))
    return 0;
  return 1;
}

static int net_stream_fill_buffer(client_t* cl,uint16_t max_len) {
  int r;
  mp_net_stream_packet_t *pack;
  
  if(!cl->stream) {
    if(!write_error(cl->fd,"No stream is currently opened\n"))
      return 0;
    return 1;
  }
  if(max_len == 0) {
    if(!write_error(cl->fd,"Fill buffer called with 0 length\n"))
      return 0;
    return 1;
  }
  pack = malloc(max_len + sizeof(mp_net_stream_packet_t));
  pack->cmd = NET_STREAM_OK;
  r = stream_read(cl->stream,pack->data,max_len);
  pack->len = le2me_16(r + sizeof(mp_net_stream_packet_t));
  if(!net_write(cl->fd,(char*)pack,le2me_16(pack->len))) {
    free(pack);
    return 0;
  }
  free(pack);
  return 1;
}

static int net_stream_seek(client_t* cl, uint64_t pos) {
  
  if(!cl->stream) {
    if(!write_error(cl->fd,"No stream is currently opened\n"))
      return 0;
    return 1;
  }

  if(!stream_seek(cl->stream,(off_t)pos)) {
    if(!write_error(cl->fd,"Seek failed\n"))
      return 0;
    return 1;
  }
  if(!write_packet(cl->fd,NET_STREAM_OK,NULL,0))
    return 0;
  return 1;
}

static int net_stream_reset(client_t* cl) {
  if(!cl->stream) {
    if(!write_error(cl->fd,"No stream is currently opened\n"))
      return 0;
    return 1;
  }
  stream_reset(cl->stream);
  if(!write_packet(cl->fd,NET_STREAM_OK,NULL,0))
    return 0;
  return 1;
}

static int net_stream_close(client_t* cl) {
  if(!cl->stream) {
    if(!write_error(cl->fd,"No stream is currently opened\n"))
      return 0;
    return 1;
  }

  free_stream(cl->stream);
  cl->stream = NULL;

  if(!write_packet(cl->fd,NET_STREAM_OK,NULL,0))
    return 0;
  return 1;
}

static int handle_client(client_t* cl,mp_net_stream_packet_t* pack) {

  if(!pack)
    return 0;
 
  switch(pack->cmd) {
  case NET_STREAM_OPEN:
    if(((char*)pack)[pack->len-1] != '\0') {
      mp_msg(MSGT_NETST,MSGL_WARN,"Got invalid open packet\n");
      return 0;
    }
    return net_stream_open(cl,pack->data);
  case NET_STREAM_FILL_BUFFER:
    if(pack->len != sizeof(mp_net_stream_packet_t) + 2) {
      mp_msg(MSGT_NETST,MSGL_WARN,"Got invalid fill buffer packet\n");
      return 0;
    }
    return net_stream_fill_buffer(cl,le2me_16(*((uint16_t*)pack->data)));
  case NET_STREAM_SEEK:
    if(pack->len != sizeof(mp_net_stream_packet_t) + 8) {
      mp_msg(MSGT_NETST,MSGL_WARN,"Got invalid fill buffer packet\n");
      return 0;
    }
    return net_stream_seek(cl,le2me_64(*((uint64_t*)pack->data)));
  case NET_STREAM_RESET:
    return net_stream_reset(cl);
  case NET_STREAM_CLOSE:
    if(pack->len != sizeof(mp_net_stream_packet_t)){
      mp_msg(MSGT_NETST,MSGL_WARN,"Got invalid fill buffer packet\n");
      return 0;
    }
    return net_stream_close(cl);
  default:
    mp_msg(MSGT_NETST,MSGL_WARN,"Got unknown command %d\n",pack->cmd);
    if(!write_error(cl->fd,"Unknown command\n"))
      return 0;
  }
  return 0;
}

static client_t* add_client(client_t *head,int fd) {
  client_t *new = calloc(1,sizeof(client_t));
  new->fd = fd;
  if(!head) return new;
  new->next = head;
  head->prev = new;
  return new;
}

static int make_fd_set(fd_set* fds, client_t** _cl, int listen) {
  int max_fd = listen;
  client_t *cl = *_cl;
  FD_ZERO(fds);
  FD_SET(listen,fds);
  while(cl) {
    // Remove this client
    if(cl->fd < 0) {
      client_t* f = cl;
      if(cl->prev) cl->prev->next = cl->next;
      if(cl->next) cl->next->prev = cl->prev;
      if(cl->stream) free_stream(cl->stream);
      if(!cl->prev) // Remove the head
	*_cl = cl->next;
      cl = cl->next;  
      free(f);
      continue;
    }
    FD_SET(cl->fd,fds);
    if(cl->fd > max_fd) max_fd = cl->fd;
    cl = cl->next;
  }
  return max_fd+1;
}

/// Hack to 'cleanly' exit
static int run_server = 1;

void exit_sig(int sig) {
  static int count = 0;
  sig++; // gcc warning
  count++;
  if(count==3) exit(1);
  if(count > 3)
#ifdef __MINGW32__
    WSACleanup();
#else
    kill(getpid(),SIGKILL);
#endif
  run_server = 0;
}

static int main_loop(int listen_fd) {
  client_t *clients = NULL,*iter;
  fd_set fds;

  signal(SIGTERM,exit_sig); // kill
#ifndef __MINGW32__
  signal(SIGHUP,exit_sig);  // kill -HUP  /  xterm closed
  signal(SIGINT,exit_sig);  // Interrupt from keyboard
  signal(SIGQUIT,exit_sig); // Quit from keyboard
#endif 

  while(run_server) {
    int sel_n = make_fd_set(&fds,&clients,listen_fd);
    int n = select(sel_n,&fds,NULL,NULL,NULL);
    if(n < 0) {
      if(errno == EINTR)
	continue;
      mp_msg(MSGT_NETST,MSGL_FATAL,"Select error: %s\n",strerror(errno));
      return 1;
    }
    // New connection
    if(FD_ISSET(listen_fd,&fds)) {
      struct sockaddr_in addr;
      socklen_t slen = sizeof(struct sockaddr_in);
      int client_fd = accept(listen_fd,(struct sockaddr*)&addr,&slen);
      if(client_fd < 0) {
	mp_msg(MSGT_NETST,MSGL_ERR,"accept failed: %s\n",strerror(errno));
	continue;
      }
      mp_msg(MSGT_NETST,MSGL_V,"New client from %s\n",inet_ntoa(addr.sin_addr));
      clients = add_client(clients,client_fd);
      if(n == 1) continue;
    }
    // Look for the clients
    for(iter = clients ; iter ; iter = iter->next) {
      mp_net_stream_packet_t* pack;
      if(!FD_ISSET(iter->fd,&fds)) continue;
      pack = read_packet(iter->fd);
      if(!pack) {
	close(iter->fd);
	iter->fd = -1;
	continue;
      }
      if(!handle_client(iter,pack)) {
	close(iter->fd);
	iter->fd = -1;
      }
      free(pack);
    }
  }
  mp_msg(MSGT_NETST,MSGL_INFO,"Exit ....\n");
  close(listen_fd);
#ifdef __MINGW32__
  WSACleanup();
#endif
  while(clients) {
    client_t* f = clients;
    if(f->stream) free_stream(f->stream);
    if(f->fd > 0) close(f->fd);
    free(f);
    clients = clients->next;
  }
  return 0;
}

int main(void) {
  int listen_fd;
  struct sockaddr_in addr;

  mp_msg_init();
  //  mp_msg_set_level(verbose+MSGL_STATUS);
  
#ifdef __MINGW32__
  WSADATA wsaData;
  WSAStartup(MAKEWORD(1,1), &wsaData);
#endif
  listen_fd = socket(AF_INET, SOCK_STREAM, 0);
  if(listen_fd < 0) {
    mp_msg(MSGT_NETST,MSGL_FATAL,"Failed to create listen_fd: %s\n",strerror(errno));
    return -1;
  }
  memset(&addr,0,sizeof(struct sockaddr));
  addr.sin_addr.s_addr = INADDR_ANY;
  addr.sin_port = htons(port);
  addr.sin_family = AF_INET;
  if(bind(listen_fd,(struct sockaddr*)&addr,sizeof(struct sockaddr))) {
    mp_msg(MSGT_NETST,MSGL_FATAL,"Failed to bind listen socket: %s\n",strerror(errno));
    return -1;
  }
  

  if(listen(listen_fd,1)) {
    mp_msg(MSGT_NETST,MSGL_FATAL,"Failed to turn the socket in listen state: %s\n",strerror(errno));
    return -1;
  }
  return main_loop(listen_fd);
}