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 *****************************************************************************/
37 #ifdef HAVE_SYS_TIME_H
38 # include <sys/time.h>
47 #include <vlc_network.h>
48 #if defined (WIN32) || defined (UNDER_CE)
50 # define EINPROGRESS WSAEWOULDBLOCK
52 # define EINTR WSAEINTR
54 # define ETIMEDOUT WSAETIMEDOUT
57 static int SocksNegociate( vlc_object_t *, int fd, int i_socks_version,
58 char *psz_socks_user, char *psz_socks_passwd );
59 static int SocksHandshakeTCP( vlc_object_t *,
60 int fd, int i_socks_version,
61 char *psz_socks_user, char *psz_socks_passwd,
62 const char *psz_host, int i_port );
63 extern int net_Socket( vlc_object_t *p_this, int i_family, int i_socktype,
66 /*****************************************************************************
68 *****************************************************************************
69 * Open a network connection.
70 * @return socket handler or -1 on error.
71 *****************************************************************************/
72 int __net_Connect( vlc_object_t *p_this, const char *psz_host, int i_port,
75 struct addrinfo hints, *res, *ptr;
76 const char *psz_realhost;
78 int i_realport, i_val, i_handle = -1, i_saved_errno = 0;
79 unsigned u_errstep = 0;
82 i_port = 80; /* historical VLC thing */
84 memset( &hints, 0, sizeof( hints ) );
85 hints.ai_socktype = SOCK_STREAM;
87 psz_socks = var_CreateGetString( p_this, "socks" );
88 if( *psz_socks && *psz_socks != ':' )
90 char *psz = strchr( psz_socks, ':' );
95 psz_realhost = psz_socks;
96 i_realport = ( psz != NULL ) ? atoi( psz ) : 1080;
98 msg_Dbg( p_this, "net: connecting to %s port %d for %s port %d",
99 psz_realhost, i_realport, psz_host, i_port );
103 psz_realhost = psz_host;
106 msg_Dbg( p_this, "net: connecting to %s port %d", psz_realhost,
110 i_val = vlc_getaddrinfo( p_this, psz_realhost, i_realport, &hints, &res );
113 msg_Err( p_this, "cannot resolve %s port %d : %s", psz_realhost,
114 i_realport, vlc_gai_strerror( i_val ) );
119 for( ptr = res; ptr != NULL; ptr = ptr->ai_next )
121 int fd = net_Socket( p_this, ptr->ai_family, type ?: ptr->ai_socktype,
122 proto ?: ptr->ai_protocol );
128 i_saved_errno = net_errno;
130 msg_Dbg( p_this, "socket error: %s", strerror( net_errno ) );
134 if( connect( fd, ptr->ai_addr, ptr->ai_addrlen ) )
136 socklen_t i_val_size = sizeof( i_val );
141 if( net_errno != EINPROGRESS )
146 i_saved_errno = net_errno;
148 msg_Dbg( p_this, "connect error: %s", strerror( net_errno ) );
152 var_Create( p_this, "ipv4-timeout",
153 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
154 var_Get( p_this, "ipv4-timeout", &timeout );
155 if( timeout.i_int < 0 )
157 msg_Err( p_this, "invalid negative value for ipv4-timeout" );
160 d = div( timeout.i_int, 100 );
162 msg_Dbg( p_this, "connection in progress" );
170 msg_Dbg( p_this, "connection aborted" );
172 vlc_freeaddrinfo( res );
177 /* Initialize file descriptor set */
182 * We'll wait 0.1 second if nothing happens
184 * time out will be shortened if we catch a signal (EINTR)
187 tv.tv_usec = (d.quot > 0) ? 100000 : (1000 * d.rem);
189 i_ret = select( fd + 1, NULL, &fds, NULL, &tv );
193 if( ( i_ret == -1 ) && ( net_errno != EINTR ) )
195 msg_Warn( p_this, "select error: %s",
196 strerror( net_errno ) );
202 msg_Dbg( p_this, "select timed out" );
206 i_saved_errno = ETIMEDOUT;
214 #if !defined( SYS_BEOS ) && !defined( UNDER_CE )
215 if( getsockopt( fd, SOL_SOCKET, SO_ERROR, (void*)&i_val,
216 &i_val_size ) == -1 || i_val != 0 )
219 i_saved_errno = i_val;
220 msg_Dbg( p_this, "connect error (via getsockopt): %s",
221 net_strerror( i_val ) );
227 i_handle = fd; /* success! */
230 next_ai: /* failure */
235 vlc_freeaddrinfo( res );
239 msg_Err( p_this, "Connection to %s port %d failed: %s", psz_host,
240 i_port, net_strerror( i_saved_errno ) );
245 if( *psz_socks && *psz_socks != ':' )
247 char *psz_user = var_CreateGetString( p_this, "socks-user" );
248 char *psz_pwd = var_CreateGetString( p_this, "socks-pwd" );
250 if( SocksHandshakeTCP( p_this, i_handle, 5, psz_user, psz_pwd,
253 msg_Err( p_this, "Failed to use the SOCKS server" );
254 net_Close( i_handle );
267 /*****************************************************************************
269 *****************************************************************************
270 * Accept a connection on a set of listening sockets and return it
271 *****************************************************************************/
272 int __net_Accept( vlc_object_t *p_this, int pi_fd[], mtime_t i_wait )
274 vlc_bool_t b_block = (i_wait < 0);
276 while( !p_this->b_die )
279 while (pi_fd[n] != -1)
281 struct pollfd ufd[n];
283 /* Initialize file descriptor set */
284 for (unsigned i = 0; i < n; i++)
286 ufd[i].fd = pi_fd[i];
287 ufd[i].events = POLLIN;
291 switch (poll (ufd, n, b_block ? 500 : i_wait))
294 if (net_errno != EINTR)
296 msg_Err (p_this, "poll error: %s",
297 net_strerror (net_errno));
307 for (unsigned i = 0; i < n; i++)
309 if (ufd[i].revents == 0)
313 int fd = accept (sfd, NULL, NULL);
316 msg_Err (p_this, "accept failed (%s)",
317 net_strerror (net_errno));
320 net_SetupSocket (fd);
323 * Move listening socket to the end to let the others in the
324 * set a chance next time.
326 memmove (pi_fd + i, pi_fd + i + 1, n - (i + 1));
328 msg_Dbg (p_this, "accepted socket %d (from socket %d)", fd, sfd);
337 /*****************************************************************************
339 *****************************************************************************
340 * Negociate authentication with a SOCKS server.
341 *****************************************************************************/
342 static int SocksNegociate( vlc_object_t *p_obj,
343 int fd, int i_socks_version,
344 char *psz_socks_user,
345 char *psz_socks_passwd )
347 uint8_t buffer[128+2*256];
349 vlc_bool_t b_auth = VLC_FALSE;
351 if( i_socks_version != 5 )
354 /* We negociate authentication */
356 if( psz_socks_user && psz_socks_passwd &&
357 *psz_socks_user && *psz_socks_passwd )
360 buffer[0] = i_socks_version; /* SOCKS version */
363 buffer[1] = 2; /* Number of methods */
364 buffer[2] = 0x00; /* - No auth required */
365 buffer[3] = 0x02; /* - USer/Password */
370 buffer[1] = 1; /* Number of methods */
371 buffer[2] = 0x00; /* - No auth required */
375 if( net_Write( p_obj, fd, NULL, buffer, i_len ) != i_len )
377 if( net_Read( p_obj, fd, NULL, buffer, 2, VLC_TRUE ) != 2 )
380 msg_Dbg( p_obj, "socks: v=%d method=%x", buffer[0], buffer[1] );
382 if( buffer[1] == 0x00 )
384 msg_Dbg( p_obj, "socks: no authentication required" );
386 else if( buffer[1] == 0x02 )
388 int i_len1 = __MIN( strlen(psz_socks_user), 255 );
389 int i_len2 = __MIN( strlen(psz_socks_passwd), 255 );
390 msg_Dbg( p_obj, "socks: username/password authentication" );
392 /* XXX: we don't support user/pwd > 255 (truncated)*/
393 buffer[0] = i_socks_version; /* Version */
394 buffer[1] = i_len1; /* User length */
395 memcpy( &buffer[2], psz_socks_user, i_len1 );
396 buffer[2+i_len1] = i_len2; /* Password length */
397 memcpy( &buffer[2+i_len1+1], psz_socks_passwd, i_len2 );
399 i_len = 3 + i_len1 + i_len2;
401 if( net_Write( p_obj, fd, NULL, buffer, i_len ) != i_len )
404 if( net_Read( p_obj, fd, NULL, buffer, 2, VLC_TRUE ) != 2 )
407 msg_Dbg( p_obj, "socks: v=%d status=%x", buffer[0], buffer[1] );
408 if( buffer[1] != 0x00 )
410 msg_Err( p_obj, "socks: authentication rejected" );
417 msg_Err( p_obj, "socks: unsupported authentication method %x",
420 msg_Err( p_obj, "socks: authentification needed" );
427 /*****************************************************************************
429 *****************************************************************************
430 * Open a TCP connection using a SOCKS server and return a handle (RFC 1928)
431 *****************************************************************************/
432 static int SocksHandshakeTCP( vlc_object_t *p_obj,
435 char *psz_socks_user, char *psz_socks_passwd,
436 const char *psz_host, int i_port )
438 uint8_t buffer[128+2*256];
440 if( i_socks_version != 4 && i_socks_version != 5 )
442 msg_Warn( p_obj, "invalid socks protocol version %d", i_socks_version );
446 if( i_socks_version == 5 &&
447 SocksNegociate( p_obj, fd, i_socks_version,
448 psz_socks_user, psz_socks_passwd ) )
451 if( i_socks_version == 4 )
453 struct addrinfo hints, *p_res;
455 /* v4 only support ipv4 */
456 memset (&hints, 0, sizeof (hints));
457 hints.ai_family = AF_INET;
458 if( vlc_getaddrinfo( p_obj, psz_host, 0, &hints, &p_res ) )
461 buffer[0] = i_socks_version;
462 buffer[1] = 0x01; /* CONNECT */
463 SetWBE( &buffer[2], i_port ); /* Port */
464 memcpy( &buffer[4], /* Address */
465 &((struct sockaddr_in *)(p_res->ai_addr))->sin_addr, 4 );
466 vlc_freeaddrinfo( p_res );
468 buffer[8] = 0; /* Empty user id */
470 if( net_Write( p_obj, fd, NULL, buffer, 9 ) != 9 )
472 if( net_Read( p_obj, fd, NULL, buffer, 8, VLC_TRUE ) != 8 )
475 msg_Dbg( p_obj, "socks: v=%d cd=%d",
476 buffer[0], buffer[1] );
478 if( buffer[1] != 90 )
481 else if( i_socks_version == 5 )
483 int i_hlen = __MIN(strlen( psz_host ), 255);
486 buffer[0] = i_socks_version; /* Version */
487 buffer[1] = 0x01; /* Cmd: connect */
488 buffer[2] = 0x00; /* Reserved */
489 buffer[3] = 3; /* ATYP: for now domainname */
492 memcpy( &buffer[5], psz_host, i_hlen );
493 SetWBE( &buffer[5+i_hlen], i_port );
495 i_len = 5 + i_hlen + 2;
498 if( net_Write( p_obj, fd, NULL, buffer, i_len ) != i_len )
501 /* Read the header */
502 if( net_Read( p_obj, fd, NULL, buffer, 5, VLC_TRUE ) != 5 )
505 msg_Dbg( p_obj, "socks: v=%d rep=%d atyp=%d",
506 buffer[0], buffer[1], buffer[3] );
508 if( buffer[1] != 0x00 )
510 msg_Err( p_obj, "socks: CONNECT request failed\n" );
514 /* Read the remaining bytes */
515 if( buffer[3] == 0x01 )
517 else if( buffer[3] == 0x03 )
518 i_len = buffer[4] + 2;
519 else if( buffer[3] == 0x04 )
524 if( net_Read( p_obj, fd, NULL, buffer, i_len, VLC_TRUE ) != i_len )
531 void net_ListenClose( int *pi_fd )
537 for( pi = pi_fd; *pi != -1; pi++ )