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 *****************************************************************************/
41 #ifdef HAVE_SYS_TIME_H
42 # include <sys/time.h>
51 #include <vlc_network.h>
52 #if defined (WIN32) || defined (UNDER_CE)
54 # define EINPROGRESS WSAEWOULDBLOCK
56 # define EINTR WSAEINTR
58 # define ETIMEDOUT WSAETIMEDOUT
61 static int SocksNegociate( vlc_object_t *, int fd, int i_socks_version,
62 const char *psz_user, const char *psz_passwd );
63 static int SocksHandshakeTCP( vlc_object_t *,
64 int fd, int i_socks_version,
65 const char *psz_user, const char *psz_passwd,
66 const char *psz_host, int i_port );
67 extern int net_Socket( vlc_object_t *p_this, int i_family, int i_socktype,
70 /*****************************************************************************
72 *****************************************************************************
73 * Open a network connection.
74 * @return socket handler or -1 on error.
75 *****************************************************************************/
76 int __net_Connect( vlc_object_t *p_this, const char *psz_host, int i_port,
79 struct addrinfo hints, *res, *ptr;
80 const char *psz_realhost;
82 int i_realport, i_val, i_handle = -1;
85 i_port = 80; /* historical VLC thing */
87 memset( &hints, 0, sizeof( hints ) );
88 hints.ai_socktype = SOCK_STREAM;
90 psz_socks = var_CreateGetNonEmptyString( p_this, "socks" );
91 if( psz_socks != NULL )
93 char *psz = strchr( psz_socks, ':' );
98 psz_realhost = psz_socks;
99 i_realport = ( psz != NULL ) ? atoi( psz ) : 1080;
100 hints.ai_flags &= ~AI_NUMERICHOST;
102 msg_Dbg( p_this, "net: connecting to %s port %d (SOCKS) "
103 "for %s port %d", psz_realhost, i_realport,
106 /* We only implement TCP with SOCKS */
114 msg_Err( p_this, "Socket type not supported through SOCKS" );
125 msg_Err( p_this, "Transport not supported through SOCKS" );
132 psz_realhost = psz_host;
135 msg_Dbg( p_this, "net: connecting to %s port %d", psz_realhost,
139 i_val = vlc_getaddrinfo( p_this, psz_realhost, i_realport, &hints, &res );
144 msg_Err( p_this, "cannot resolve %s port %d : %s", psz_realhost,
145 i_realport, vlc_gai_strerror( i_val ) );
149 for( ptr = res; ptr != NULL; ptr = ptr->ai_next )
151 int fd = net_Socket( p_this, ptr->ai_family, type ?: ptr->ai_socktype,
152 proto ?: ptr->ai_protocol );
155 msg_Dbg( p_this, "socket error: %m" );
159 if( connect( fd, ptr->ai_addr, ptr->ai_addrlen ) )
161 socklen_t i_val_size = sizeof( i_val );
165 if( net_errno != EINPROGRESS )
167 msg_Err( p_this, "connection failed: %m" );
170 msg_Dbg( p_this, "connection: %m" );
172 var_Create( p_this, "ipv4-timeout",
173 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
174 var_Get( p_this, "ipv4-timeout", &timeout );
175 if( timeout.i_int < 0 )
177 msg_Err( p_this, "invalid negative value for ipv4-timeout" );
180 d = div( timeout.i_int, 100 );
184 struct pollfd ufd = { .fd = fd, .events = POLLOUT };
189 msg_Dbg( p_this, "connection aborted" );
191 vlc_freeaddrinfo( res );
196 * We'll wait 0.1 second if nothing happens
198 * time out will be shortened if we catch a signal (EINTR)
200 i_ret = poll (&ufd, 1, (d.quot > 0) ? 100 : d.rem);
204 if( ( i_ret == -1 ) && ( net_errno != EINTR ) )
206 msg_Err( p_this, "connection polling error: %m" );
212 msg_Warn( p_this, "connection timed out" );
219 #if !defined( SYS_BEOS ) && !defined( UNDER_CE )
220 if( getsockopt( fd, SOL_SOCKET, SO_ERROR, (void*)&i_val,
221 &i_val_size ) == -1 || i_val != 0 )
224 msg_Err( p_this, "connection failed: %m" );
230 msg_Dbg( p_this, "connection succeeded (socket = %d)", fd );
231 i_handle = fd; /* success! */
234 next_ai: /* failure */
239 vlc_freeaddrinfo( res );
244 if( psz_socks != NULL )
246 /* NOTE: psz_socks already free'd! */
247 char *psz_user = var_CreateGetNonEmptyString( p_this, "socks-user" );
248 char *psz_pwd = var_CreateGetNonEmptyString( p_this, "socks-pwd" );
250 if( SocksHandshakeTCP( p_this, i_handle, 5, psz_user, psz_pwd,
253 msg_Err( p_this, "SOCKS handshake failed" );
254 net_Close( i_handle );
266 int net_AcceptSingle (vlc_object_t *obj, int lfd)
268 int fd = accept (lfd, NULL, NULL);
271 if (net_errno != EAGAIN)
272 msg_Err (obj, "accept failed (from socket %d): %m", lfd);
276 msg_Dbg (obj, "accepted socket %d (from socket %d)", fd, lfd);
277 net_SetupSocket (fd);
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 int timeout = (i_wait < 0) ? -1 : i_wait / 1000;
292 assert( pi_fd != NULL );
294 evfd = vlc_object_waitpipe (p_this);
299 while (pi_fd[n] != -1)
301 struct pollfd ufd[n + 1];
303 /* Initialize file descriptor set */
304 for (unsigned i = 0; i <= n; i++)
306 ufd[i].fd = (i < n) ? pi_fd[i] : evfd;
307 ufd[i].events = POLLIN;
311 n--; /* avoid EBADF */
313 switch (poll (ufd, n, timeout))
316 if (net_errno != EINTR)
317 msg_Err (p_this, "poll error: %m");
319 return -1; /* NOTE: p_this already unlocked */
328 for (unsigned i = 0; i < n; i++)
330 if (ufd[i].revents == 0)
334 int fd = net_AcceptSingle (p_this, sfd);
339 * Move listening socket to the end to let the others in the
340 * set a chance next time.
342 memmove (pi_fd + i, pi_fd + i + 1, n - (i + 1));
351 /*****************************************************************************
353 *****************************************************************************
354 * Negociate authentication with a SOCKS server.
355 *****************************************************************************/
356 static int SocksNegociate( vlc_object_t *p_obj,
357 int fd, int i_socks_version,
358 const char *psz_socks_user,
359 const char *psz_socks_passwd )
361 uint8_t buffer[128+2*256];
363 vlc_bool_t b_auth = VLC_FALSE;
365 if( i_socks_version != 5 )
368 /* We negociate authentication */
370 if( ( psz_socks_user == NULL ) && ( psz_socks_passwd == NULL ) )
373 buffer[0] = i_socks_version; /* SOCKS version */
376 buffer[1] = 2; /* Number of methods */
377 buffer[2] = 0x00; /* - No auth required */
378 buffer[3] = 0x02; /* - USer/Password */
383 buffer[1] = 1; /* Number of methods */
384 buffer[2] = 0x00; /* - No auth required */
388 if( net_Write( p_obj, fd, NULL, buffer, i_len ) != i_len )
390 if( net_Read( p_obj, fd, NULL, buffer, 2, VLC_TRUE ) != 2 )
393 msg_Dbg( p_obj, "socks: v=%d method=%x", buffer[0], buffer[1] );
395 if( buffer[1] == 0x00 )
397 msg_Dbg( p_obj, "socks: no authentication required" );
399 else if( buffer[1] == 0x02 )
401 int i_len1 = __MIN( strlen(psz_socks_user), 255 );
402 int i_len2 = __MIN( strlen(psz_socks_passwd), 255 );
403 msg_Dbg( p_obj, "socks: username/password authentication" );
405 /* XXX: we don't support user/pwd > 255 (truncated)*/
406 buffer[0] = i_socks_version; /* Version */
407 buffer[1] = i_len1; /* User length */
408 memcpy( &buffer[2], psz_socks_user, i_len1 );
409 buffer[2+i_len1] = i_len2; /* Password length */
410 memcpy( &buffer[2+i_len1+1], psz_socks_passwd, i_len2 );
412 i_len = 3 + i_len1 + i_len2;
414 if( net_Write( p_obj, fd, NULL, buffer, i_len ) != i_len )
417 if( net_Read( p_obj, fd, NULL, buffer, 2, VLC_TRUE ) != 2 )
420 msg_Dbg( p_obj, "socks: v=%d status=%x", buffer[0], buffer[1] );
421 if( buffer[1] != 0x00 )
423 msg_Err( p_obj, "socks: authentication rejected" );
430 msg_Err( p_obj, "socks: unsupported authentication method %x",
433 msg_Err( p_obj, "socks: authentification needed" );
440 /*****************************************************************************
442 *****************************************************************************
443 * Open a TCP connection using a SOCKS server and return a handle (RFC 1928)
444 *****************************************************************************/
445 static int SocksHandshakeTCP( vlc_object_t *p_obj,
448 const char *psz_user, const char *psz_passwd,
449 const char *psz_host, int i_port )
451 uint8_t buffer[128+2*256];
453 if( i_socks_version != 4 && i_socks_version != 5 )
455 msg_Warn( p_obj, "invalid socks protocol version %d", i_socks_version );
459 if( i_socks_version == 5 &&
460 SocksNegociate( p_obj, fd, i_socks_version,
461 psz_user, psz_passwd ) )
464 if( i_socks_version == 4 )
466 struct addrinfo hints, *p_res;
468 /* v4 only support ipv4 */
469 memset (&hints, 0, sizeof (hints));
470 hints.ai_family = AF_INET;
471 if( vlc_getaddrinfo( p_obj, psz_host, 0, &hints, &p_res ) )
474 buffer[0] = i_socks_version;
475 buffer[1] = 0x01; /* CONNECT */
476 SetWBE( &buffer[2], i_port ); /* Port */
477 memcpy( &buffer[4], /* Address */
478 &((struct sockaddr_in *)(p_res->ai_addr))->sin_addr, 4 );
479 vlc_freeaddrinfo( p_res );
481 buffer[8] = 0; /* Empty user id */
483 if( net_Write( p_obj, fd, NULL, buffer, 9 ) != 9 )
485 if( net_Read( p_obj, fd, NULL, buffer, 8, VLC_TRUE ) != 8 )
488 msg_Dbg( p_obj, "socks: v=%d cd=%d",
489 buffer[0], buffer[1] );
491 if( buffer[1] != 90 )
494 else if( i_socks_version == 5 )
496 int i_hlen = __MIN(strlen( psz_host ), 255);
499 buffer[0] = i_socks_version; /* Version */
500 buffer[1] = 0x01; /* Cmd: connect */
501 buffer[2] = 0x00; /* Reserved */
502 buffer[3] = 3; /* ATYP: for now domainname */
505 memcpy( &buffer[5], psz_host, i_hlen );
506 SetWBE( &buffer[5+i_hlen], i_port );
508 i_len = 5 + i_hlen + 2;
511 if( net_Write( p_obj, fd, NULL, buffer, i_len ) != i_len )
514 /* Read the header */
515 if( net_Read( p_obj, fd, NULL, buffer, 5, VLC_TRUE ) != 5 )
518 msg_Dbg( p_obj, "socks: v=%d rep=%d atyp=%d",
519 buffer[0], buffer[1], buffer[3] );
521 if( buffer[1] != 0x00 )
523 msg_Err( p_obj, "socks: CONNECT request failed\n" );
527 /* Read the remaining bytes */
528 if( buffer[3] == 0x01 )
530 else if( buffer[3] == 0x03 )
531 i_len = buffer[4] + 2;
532 else if( buffer[3] == 0x04 )
537 if( net_Read( p_obj, fd, NULL, buffer, i_len, VLC_TRUE ) != i_len )
544 void net_ListenClose( int *pi_fd )
550 for( pi = pi_fd; *pi != -1; pi++ )