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;
80 i_port = 80; /* historical VLC thing */
82 memset( &hints, 0, sizeof( hints ) );
83 hints.ai_socktype = SOCK_STREAM;
85 psz_socks = var_CreateGetNonEmptyString( p_this, "socks" );
86 if( psz_socks != NULL )
88 char *psz = strchr( psz_socks, ':' );
93 psz_realhost = psz_socks;
94 i_realport = ( psz != NULL ) ? atoi( psz ) : 1080;
95 hints.ai_flags &= ~AI_NUMERICHOST;
97 msg_Dbg( p_this, "net: connecting to %s port %d (SOCKS) "
98 "for %s port %d", psz_realhost, i_realport,
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 );
150 msg_Dbg( p_this, "socket error: %s", strerror( net_errno ) );
154 if( connect( fd, ptr->ai_addr, ptr->ai_addrlen ) )
156 socklen_t i_val_size = sizeof( i_val );
160 if( net_errno != EINPROGRESS )
162 msg_Err( p_this, "connection failed: %s",
163 strerror( net_errno ) );
167 var_Create( p_this, "ipv4-timeout",
168 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
169 var_Get( p_this, "ipv4-timeout", &timeout );
170 if( timeout.i_int < 0 )
172 msg_Err( p_this, "invalid negative value for ipv4-timeout" );
175 d = div( timeout.i_int, 100 );
177 msg_Dbg( p_this, "connection in progress" );
180 struct pollfd ufd = { .fd = fd, .events = POLLOUT };
185 msg_Dbg( p_this, "connection aborted" );
187 vlc_freeaddrinfo( res );
192 * We'll wait 0.1 second if nothing happens
194 * time out will be shortened if we catch a signal (EINTR)
196 i_ret = poll (&ufd, 1, (d.quot > 0) ? 100 : d.rem);
200 if( ( i_ret == -1 ) && ( net_errno != EINTR ) )
202 msg_Err( p_this, "connection polling error: %s",
203 strerror( net_errno ) );
209 msg_Warn( p_this, "connection timed out" );
216 #if !defined( SYS_BEOS ) && !defined( UNDER_CE )
217 if( getsockopt( fd, SOL_SOCKET, SO_ERROR, (void*)&i_val,
218 &i_val_size ) == -1 || i_val != 0 )
220 msg_Err( p_this, "connection failed: %s",
221 net_strerror( i_val ) );
227 i_handle = fd; /* success! */
230 next_ai: /* failure */
235 vlc_freeaddrinfo( res );
240 if( psz_socks != NULL )
242 /* NOTE: psz_socks already free'd! */
243 char *psz_user = var_CreateGetString( p_this, "socks-user" );
244 char *psz_pwd = var_CreateGetString( p_this, "socks-pwd" );
246 if( SocksHandshakeTCP( p_this, i_handle, 5, psz_user, psz_pwd,
249 msg_Err( p_this, "SOCKS handshake failed" );
250 net_Close( i_handle );
262 /*****************************************************************************
264 *****************************************************************************
265 * Accept a connection on a set of listening sockets and return it
266 *****************************************************************************/
267 int __net_Accept( vlc_object_t *p_this, int pi_fd[], mtime_t i_wait )
269 vlc_bool_t b_block = (i_wait < 0);
271 while( !p_this->b_die )
274 while (pi_fd[n] != -1)
276 struct pollfd ufd[n];
278 /* Initialize file descriptor set */
279 for (unsigned i = 0; i < n; i++)
281 ufd[i].fd = pi_fd[i];
282 ufd[i].events = POLLIN;
286 switch (poll (ufd, n, b_block ? 500 : i_wait))
289 if (net_errno != EINTR)
291 msg_Err (p_this, "poll error: %s",
292 net_strerror (net_errno));
302 for (unsigned i = 0; i < n; i++)
304 if (ufd[i].revents == 0)
308 int fd = accept (sfd, NULL, NULL);
311 msg_Err (p_this, "accept failed (%s)",
312 net_strerror (net_errno));
315 net_SetupSocket (fd);
318 * Move listening socket to the end to let the others in the
319 * set a chance next time.
321 memmove (pi_fd + i, pi_fd + i + 1, n - (i + 1));
323 msg_Dbg (p_this, "accepted socket %d (from socket %d)", fd, sfd);
332 /*****************************************************************************
334 *****************************************************************************
335 * Negociate authentication with a SOCKS server.
336 *****************************************************************************/
337 static int SocksNegociate( vlc_object_t *p_obj,
338 int fd, int i_socks_version,
339 char *psz_socks_user,
340 char *psz_socks_passwd )
342 uint8_t buffer[128+2*256];
344 vlc_bool_t b_auth = VLC_FALSE;
346 if( i_socks_version != 5 )
349 /* We negociate authentication */
351 if( psz_socks_user && psz_socks_passwd &&
352 *psz_socks_user && *psz_socks_passwd )
355 buffer[0] = i_socks_version; /* SOCKS version */
358 buffer[1] = 2; /* Number of methods */
359 buffer[2] = 0x00; /* - No auth required */
360 buffer[3] = 0x02; /* - USer/Password */
365 buffer[1] = 1; /* Number of methods */
366 buffer[2] = 0x00; /* - No auth required */
370 if( net_Write( p_obj, fd, NULL, buffer, i_len ) != i_len )
372 if( net_Read( p_obj, fd, NULL, buffer, 2, VLC_TRUE ) != 2 )
375 msg_Dbg( p_obj, "socks: v=%d method=%x", buffer[0], buffer[1] );
377 if( buffer[1] == 0x00 )
379 msg_Dbg( p_obj, "socks: no authentication required" );
381 else if( buffer[1] == 0x02 )
383 int i_len1 = __MIN( strlen(psz_socks_user), 255 );
384 int i_len2 = __MIN( strlen(psz_socks_passwd), 255 );
385 msg_Dbg( p_obj, "socks: username/password authentication" );
387 /* XXX: we don't support user/pwd > 255 (truncated)*/
388 buffer[0] = i_socks_version; /* Version */
389 buffer[1] = i_len1; /* User length */
390 memcpy( &buffer[2], psz_socks_user, i_len1 );
391 buffer[2+i_len1] = i_len2; /* Password length */
392 memcpy( &buffer[2+i_len1+1], psz_socks_passwd, i_len2 );
394 i_len = 3 + i_len1 + i_len2;
396 if( net_Write( p_obj, fd, NULL, buffer, i_len ) != i_len )
399 if( net_Read( p_obj, fd, NULL, buffer, 2, VLC_TRUE ) != 2 )
402 msg_Dbg( p_obj, "socks: v=%d status=%x", buffer[0], buffer[1] );
403 if( buffer[1] != 0x00 )
405 msg_Err( p_obj, "socks: authentication rejected" );
412 msg_Err( p_obj, "socks: unsupported authentication method %x",
415 msg_Err( p_obj, "socks: authentification needed" );
422 /*****************************************************************************
424 *****************************************************************************
425 * Open a TCP connection using a SOCKS server and return a handle (RFC 1928)
426 *****************************************************************************/
427 static int SocksHandshakeTCP( vlc_object_t *p_obj,
430 char *psz_socks_user, char *psz_socks_passwd,
431 const char *psz_host, int i_port )
433 uint8_t buffer[128+2*256];
435 if( i_socks_version != 4 && i_socks_version != 5 )
437 msg_Warn( p_obj, "invalid socks protocol version %d", i_socks_version );
441 if( i_socks_version == 5 &&
442 SocksNegociate( p_obj, fd, i_socks_version,
443 psz_socks_user, psz_socks_passwd ) )
446 if( i_socks_version == 4 )
448 struct addrinfo hints, *p_res;
450 /* v4 only support ipv4 */
451 memset (&hints, 0, sizeof (hints));
452 hints.ai_family = AF_INET;
453 if( vlc_getaddrinfo( p_obj, psz_host, 0, &hints, &p_res ) )
456 buffer[0] = i_socks_version;
457 buffer[1] = 0x01; /* CONNECT */
458 SetWBE( &buffer[2], i_port ); /* Port */
459 memcpy( &buffer[4], /* Address */
460 &((struct sockaddr_in *)(p_res->ai_addr))->sin_addr, 4 );
461 vlc_freeaddrinfo( p_res );
463 buffer[8] = 0; /* Empty user id */
465 if( net_Write( p_obj, fd, NULL, buffer, 9 ) != 9 )
467 if( net_Read( p_obj, fd, NULL, buffer, 8, VLC_TRUE ) != 8 )
470 msg_Dbg( p_obj, "socks: v=%d cd=%d",
471 buffer[0], buffer[1] );
473 if( buffer[1] != 90 )
476 else if( i_socks_version == 5 )
478 int i_hlen = __MIN(strlen( psz_host ), 255);
481 buffer[0] = i_socks_version; /* Version */
482 buffer[1] = 0x01; /* Cmd: connect */
483 buffer[2] = 0x00; /* Reserved */
484 buffer[3] = 3; /* ATYP: for now domainname */
487 memcpy( &buffer[5], psz_host, i_hlen );
488 SetWBE( &buffer[5+i_hlen], i_port );
490 i_len = 5 + i_hlen + 2;
493 if( net_Write( p_obj, fd, NULL, buffer, i_len ) != i_len )
496 /* Read the header */
497 if( net_Read( p_obj, fd, NULL, buffer, 5, VLC_TRUE ) != 5 )
500 msg_Dbg( p_obj, "socks: v=%d rep=%d atyp=%d",
501 buffer[0], buffer[1], buffer[3] );
503 if( buffer[1] != 0x00 )
505 msg_Err( p_obj, "socks: CONNECT request failed\n" );
509 /* Read the remaining bytes */
510 if( buffer[3] == 0x01 )
512 else if( buffer[3] == 0x03 )
513 i_len = buffer[4] + 2;
514 else if( buffer[3] == 0x04 )
519 if( net_Read( p_obj, fd, NULL, buffer, i_len, VLC_TRUE ) != i_len )
526 void net_ListenClose( int *pi_fd )
532 for( pi = pi_fd; *pi != -1; pi++ )