1 /*****************************************************************************
3 *****************************************************************************
4 * Copyright (C) 2004-2005 the VideoLAN team
5 * Copyright (C) 2005-2006 Rémi Denis-Courmont
8 * Authors: Laurent Aimar <fenrir@videolan.org>
9 * Rémi Denis-Courmont <rem # videolan.org>
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
24 *****************************************************************************/
26 /*****************************************************************************
28 *****************************************************************************/
36 #ifdef HAVE_SYS_TIME_H
37 # include <sys/time.h>
46 #include <vlc_network.h>
47 #if defined (WIN32) || defined (UNDER_CE)
49 # define EINPROGRESS WSAEWOULDBLOCK
51 # define EINTR WSAEINTR
53 # define ETIMEDOUT WSAETIMEDOUT
56 static int SocksNegociate( vlc_object_t *, int fd, int i_socks_version,
57 char *psz_socks_user, char *psz_socks_passwd );
58 static int SocksHandshakeTCP( vlc_object_t *,
59 int fd, int i_socks_version,
60 char *psz_socks_user, char *psz_socks_passwd,
61 const char *psz_host, int i_port );
62 extern int net_Socket( vlc_object_t *p_this, int i_family, int i_socktype,
65 /*****************************************************************************
67 *****************************************************************************
68 * Open a network connection.
69 * @return socket handler or -1 on error.
70 *****************************************************************************/
71 int __net_Connect( vlc_object_t *p_this, const char *psz_host, int i_port,
74 struct addrinfo hints, *res, *ptr;
75 const char *psz_realhost;
77 int i_realport, i_val, i_handle = -1, i_saved_errno = 0;
78 unsigned u_errstep = 0;
81 i_port = 80; /* historical VLC thing */
83 memset( &hints, 0, sizeof( hints ) );
84 hints.ai_socktype = SOCK_STREAM;
86 psz_socks = var_CreateGetNonEmptyString( p_this, "socks" );
87 if( psz_socks != NULL )
89 char *psz = strchr( psz_socks, ':' );
94 psz_realhost = psz_socks;
95 i_realport = ( psz != NULL ) ? atoi( psz ) : 1080;
96 hints.ai_flags &= ~AI_NUMERICHOST;
98 msg_Dbg( p_this, "net: connecting to %s port %d (SOCKS) for %s port %d",
99 psz_realhost, i_realport, psz_host, i_port );
101 /* We only implement TCP with SOCKS */
109 msg_Err( p_this, "Socket type not supported through SOCKS" );
120 msg_Err( p_this, "Transport not supported through SOCKS" );
127 psz_realhost = psz_host;
130 msg_Dbg( p_this, "net: connecting to %s port %d", psz_realhost,
134 i_val = vlc_getaddrinfo( p_this, psz_realhost, i_realport, &hints, &res );
139 msg_Err( p_this, "cannot resolve %s port %d : %s", psz_realhost,
140 i_realport, vlc_gai_strerror( i_val ) );
144 for( ptr = res; ptr != NULL; ptr = ptr->ai_next )
146 int fd = net_Socket( p_this, ptr->ai_family, type ?: ptr->ai_socktype,
147 proto ?: ptr->ai_protocol );
153 i_saved_errno = net_errno;
155 msg_Dbg( p_this, "socket error: %s", strerror( net_errno ) );
159 if( connect( fd, ptr->ai_addr, ptr->ai_addrlen ) )
161 socklen_t i_val_size = sizeof( i_val );
165 if( net_errno != EINPROGRESS )
170 i_saved_errno = net_errno;
172 msg_Dbg( p_this, "connect error: %s", strerror( net_errno ) );
176 var_Create( p_this, "ipv4-timeout",
177 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
178 var_Get( p_this, "ipv4-timeout", &timeout );
179 if( timeout.i_int < 0 )
181 msg_Err( p_this, "invalid negative value for ipv4-timeout" );
184 d = div( timeout.i_int, 100 );
186 msg_Dbg( p_this, "connection in progress" );
189 struct pollfd ufd = { .fd = fd, .events = POLLOUT };
194 msg_Dbg( p_this, "connection aborted" );
196 vlc_freeaddrinfo( res );
201 * We'll wait 0.1 second if nothing happens
203 * time out will be shortened if we catch a signal (EINTR)
205 i_ret = poll (&ufd, 1, (d.quot > 0) ? 100 : d.rem);
209 if( ( i_ret == -1 ) && ( net_errno != EINTR ) )
211 msg_Warn( p_this, "select error: %s",
212 strerror( net_errno ) );
218 msg_Dbg( p_this, "select timed out" );
222 i_saved_errno = ETIMEDOUT;
230 #if !defined( SYS_BEOS ) && !defined( UNDER_CE )
231 if( getsockopt( fd, SOL_SOCKET, SO_ERROR, (void*)&i_val,
232 &i_val_size ) == -1 || i_val != 0 )
235 i_saved_errno = i_val;
236 msg_Dbg( p_this, "connect error (via getsockopt): %s",
237 net_strerror( i_val ) );
243 i_handle = fd; /* success! */
246 next_ai: /* failure */
251 vlc_freeaddrinfo( res );
255 msg_Err( p_this, "Connection to %s port %d failed: %s", psz_host,
256 i_port, net_strerror( i_saved_errno ) );
260 if( psz_socks != NULL )
262 /* NOTE: psz_socks already free'd! */
263 char *psz_user = var_CreateGetString( p_this, "socks-user" );
264 char *psz_pwd = var_CreateGetString( p_this, "socks-pwd" );
266 if( SocksHandshakeTCP( p_this, i_handle, 5, psz_user, psz_pwd,
269 msg_Err( p_this, "Failed to use the SOCKS server" );
270 net_Close( i_handle );
282 /*****************************************************************************
284 *****************************************************************************
285 * Accept a connection on a set of listening sockets and return it
286 *****************************************************************************/
287 int __net_Accept( vlc_object_t *p_this, int pi_fd[], mtime_t i_wait )
289 vlc_bool_t b_block = (i_wait < 0);
291 while( !p_this->b_die )
294 while (pi_fd[n] != -1)
296 struct pollfd ufd[n];
298 /* Initialize file descriptor set */
299 for (unsigned i = 0; i < n; i++)
301 ufd[i].fd = pi_fd[i];
302 ufd[i].events = POLLIN;
306 switch (poll (ufd, n, b_block ? 500 : i_wait))
309 if (net_errno != EINTR)
311 msg_Err (p_this, "poll error: %s",
312 net_strerror (net_errno));
322 for (unsigned i = 0; i < n; i++)
324 if (ufd[i].revents == 0)
328 int fd = accept (sfd, NULL, NULL);
331 msg_Err (p_this, "accept failed (%s)",
332 net_strerror (net_errno));
335 net_SetupSocket (fd);
338 * Move listening socket to the end to let the others in the
339 * set a chance next time.
341 memmove (pi_fd + i, pi_fd + i + 1, n - (i + 1));
343 msg_Dbg (p_this, "accepted socket %d (from socket %d)", fd, sfd);
352 /*****************************************************************************
354 *****************************************************************************
355 * Negociate authentication with a SOCKS server.
356 *****************************************************************************/
357 static int SocksNegociate( vlc_object_t *p_obj,
358 int fd, int i_socks_version,
359 char *psz_socks_user,
360 char *psz_socks_passwd )
362 uint8_t buffer[128+2*256];
364 vlc_bool_t b_auth = VLC_FALSE;
366 if( i_socks_version != 5 )
369 /* We negociate authentication */
371 if( psz_socks_user && psz_socks_passwd &&
372 *psz_socks_user && *psz_socks_passwd )
375 buffer[0] = i_socks_version; /* SOCKS version */
378 buffer[1] = 2; /* Number of methods */
379 buffer[2] = 0x00; /* - No auth required */
380 buffer[3] = 0x02; /* - USer/Password */
385 buffer[1] = 1; /* Number of methods */
386 buffer[2] = 0x00; /* - No auth required */
390 if( net_Write( p_obj, fd, NULL, buffer, i_len ) != i_len )
392 if( net_Read( p_obj, fd, NULL, buffer, 2, VLC_TRUE ) != 2 )
395 msg_Dbg( p_obj, "socks: v=%d method=%x", buffer[0], buffer[1] );
397 if( buffer[1] == 0x00 )
399 msg_Dbg( p_obj, "socks: no authentication required" );
401 else if( buffer[1] == 0x02 )
403 int i_len1 = __MIN( strlen(psz_socks_user), 255 );
404 int i_len2 = __MIN( strlen(psz_socks_passwd), 255 );
405 msg_Dbg( p_obj, "socks: username/password authentication" );
407 /* XXX: we don't support user/pwd > 255 (truncated)*/
408 buffer[0] = i_socks_version; /* Version */
409 buffer[1] = i_len1; /* User length */
410 memcpy( &buffer[2], psz_socks_user, i_len1 );
411 buffer[2+i_len1] = i_len2; /* Password length */
412 memcpy( &buffer[2+i_len1+1], psz_socks_passwd, i_len2 );
414 i_len = 3 + i_len1 + i_len2;
416 if( net_Write( p_obj, fd, NULL, buffer, i_len ) != i_len )
419 if( net_Read( p_obj, fd, NULL, buffer, 2, VLC_TRUE ) != 2 )
422 msg_Dbg( p_obj, "socks: v=%d status=%x", buffer[0], buffer[1] );
423 if( buffer[1] != 0x00 )
425 msg_Err( p_obj, "socks: authentication rejected" );
432 msg_Err( p_obj, "socks: unsupported authentication method %x",
435 msg_Err( p_obj, "socks: authentification needed" );
442 /*****************************************************************************
444 *****************************************************************************
445 * Open a TCP connection using a SOCKS server and return a handle (RFC 1928)
446 *****************************************************************************/
447 static int SocksHandshakeTCP( vlc_object_t *p_obj,
450 char *psz_socks_user, char *psz_socks_passwd,
451 const char *psz_host, int i_port )
453 uint8_t buffer[128+2*256];
455 if( i_socks_version != 4 && i_socks_version != 5 )
457 msg_Warn( p_obj, "invalid socks protocol version %d", i_socks_version );
461 if( i_socks_version == 5 &&
462 SocksNegociate( p_obj, fd, i_socks_version,
463 psz_socks_user, psz_socks_passwd ) )
466 if( i_socks_version == 4 )
468 struct addrinfo hints, *p_res;
470 /* v4 only support ipv4 */
471 memset (&hints, 0, sizeof (hints));
472 hints.ai_family = AF_INET;
473 if( vlc_getaddrinfo( p_obj, psz_host, 0, &hints, &p_res ) )
476 buffer[0] = i_socks_version;
477 buffer[1] = 0x01; /* CONNECT */
478 SetWBE( &buffer[2], i_port ); /* Port */
479 memcpy( &buffer[4], /* Address */
480 &((struct sockaddr_in *)(p_res->ai_addr))->sin_addr, 4 );
481 vlc_freeaddrinfo( p_res );
483 buffer[8] = 0; /* Empty user id */
485 if( net_Write( p_obj, fd, NULL, buffer, 9 ) != 9 )
487 if( net_Read( p_obj, fd, NULL, buffer, 8, VLC_TRUE ) != 8 )
490 msg_Dbg( p_obj, "socks: v=%d cd=%d",
491 buffer[0], buffer[1] );
493 if( buffer[1] != 90 )
496 else if( i_socks_version == 5 )
498 int i_hlen = __MIN(strlen( psz_host ), 255);
501 buffer[0] = i_socks_version; /* Version */
502 buffer[1] = 0x01; /* Cmd: connect */
503 buffer[2] = 0x00; /* Reserved */
504 buffer[3] = 3; /* ATYP: for now domainname */
507 memcpy( &buffer[5], psz_host, i_hlen );
508 SetWBE( &buffer[5+i_hlen], i_port );
510 i_len = 5 + i_hlen + 2;
513 if( net_Write( p_obj, fd, NULL, buffer, i_len ) != i_len )
516 /* Read the header */
517 if( net_Read( p_obj, fd, NULL, buffer, 5, VLC_TRUE ) != 5 )
520 msg_Dbg( p_obj, "socks: v=%d rep=%d atyp=%d",
521 buffer[0], buffer[1], buffer[3] );
523 if( buffer[1] != 0x00 )
525 msg_Err( p_obj, "socks: CONNECT request failed\n" );
529 /* Read the remaining bytes */
530 if( buffer[3] == 0x01 )
532 else if( buffer[3] == 0x03 )
533 i_len = buffer[4] + 2;
534 else if( buffer[3] == 0x04 )
539 if( net_Read( p_obj, fd, NULL, buffer, i_len, VLC_TRUE ) != i_len )
546 void net_ListenClose( int *pi_fd )
552 for( pi = pi_fd; *pi != -1; pi++ )