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;
97 msg_Dbg( p_this, "net: connecting to %s port %d (SOCKS) for %s port %d",
98 psz_realhost, i_realport, psz_host, i_port );
100 /* We only implement TCP with SOCKS */
108 msg_Err( p_this, "Socket type not supported through SOCKS" );
119 msg_Err( p_this, "Transport not supported through SOCKS" );
126 psz_realhost = psz_host;
129 msg_Dbg( p_this, "net: connecting to %s port %d", psz_realhost,
133 i_val = vlc_getaddrinfo( p_this, psz_realhost, i_realport, &hints, &res );
138 msg_Err( p_this, "cannot resolve %s port %d : %s", psz_realhost,
139 i_realport, vlc_gai_strerror( i_val ) );
143 for( ptr = res; ptr != NULL; ptr = ptr->ai_next )
145 int fd = net_Socket( p_this, ptr->ai_family, type ?: ptr->ai_socktype,
146 proto ?: ptr->ai_protocol );
152 i_saved_errno = net_errno;
154 msg_Dbg( p_this, "socket error: %s", strerror( net_errno ) );
158 if( connect( fd, ptr->ai_addr, ptr->ai_addrlen ) )
160 socklen_t i_val_size = sizeof( i_val );
164 if( net_errno != EINPROGRESS )
169 i_saved_errno = net_errno;
171 msg_Dbg( p_this, "connect error: %s", strerror( net_errno ) );
175 var_Create( p_this, "ipv4-timeout",
176 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
177 var_Get( p_this, "ipv4-timeout", &timeout );
178 if( timeout.i_int < 0 )
180 msg_Err( p_this, "invalid negative value for ipv4-timeout" );
183 d = div( timeout.i_int, 100 );
185 msg_Dbg( p_this, "connection in progress" );
188 struct pollfd ufd = { .fd = fd, .events = POLLOUT };
193 msg_Dbg( p_this, "connection aborted" );
195 vlc_freeaddrinfo( res );
200 * We'll wait 0.1 second if nothing happens
202 * time out will be shortened if we catch a signal (EINTR)
204 i_ret = poll (&ufd, 1, (d.quot > 0) ? 100 : d.rem);
208 if( ( i_ret == -1 ) && ( net_errno != EINTR ) )
210 msg_Warn( p_this, "select error: %s",
211 strerror( net_errno ) );
217 msg_Dbg( p_this, "select timed out" );
221 i_saved_errno = ETIMEDOUT;
229 #if !defined( SYS_BEOS ) && !defined( UNDER_CE )
230 if( getsockopt( fd, SOL_SOCKET, SO_ERROR, (void*)&i_val,
231 &i_val_size ) == -1 || i_val != 0 )
234 i_saved_errno = i_val;
235 msg_Dbg( p_this, "connect error (via getsockopt): %s",
236 net_strerror( i_val ) );
242 i_handle = fd; /* success! */
245 next_ai: /* failure */
250 vlc_freeaddrinfo( res );
254 msg_Err( p_this, "Connection to %s port %d failed: %s", psz_host,
255 i_port, net_strerror( i_saved_errno ) );
259 if( psz_socks != NULL )
261 /* NOTE: psz_socks already free'd! */
262 char *psz_user = var_CreateGetString( p_this, "socks-user" );
263 char *psz_pwd = var_CreateGetString( p_this, "socks-pwd" );
265 if( SocksHandshakeTCP( p_this, i_handle, 5, psz_user, psz_pwd,
268 msg_Err( p_this, "Failed to use the SOCKS server" );
269 net_Close( i_handle );
281 /*****************************************************************************
283 *****************************************************************************
284 * Accept a connection on a set of listening sockets and return it
285 *****************************************************************************/
286 int __net_Accept( vlc_object_t *p_this, int pi_fd[], mtime_t i_wait )
288 vlc_bool_t b_block = (i_wait < 0);
290 while( !p_this->b_die )
293 while (pi_fd[n] != -1)
295 struct pollfd ufd[n];
297 /* Initialize file descriptor set */
298 for (unsigned i = 0; i < n; i++)
300 ufd[i].fd = pi_fd[i];
301 ufd[i].events = POLLIN;
305 switch (poll (ufd, n, b_block ? 500 : i_wait))
308 if (net_errno != EINTR)
310 msg_Err (p_this, "poll error: %s",
311 net_strerror (net_errno));
321 for (unsigned i = 0; i < n; i++)
323 if (ufd[i].revents == 0)
327 int fd = accept (sfd, NULL, NULL);
330 msg_Err (p_this, "accept failed (%s)",
331 net_strerror (net_errno));
334 net_SetupSocket (fd);
337 * Move listening socket to the end to let the others in the
338 * set a chance next time.
340 memmove (pi_fd + i, pi_fd + i + 1, n - (i + 1));
342 msg_Dbg (p_this, "accepted socket %d (from socket %d)", fd, sfd);
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 char *psz_socks_user,
359 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 && psz_socks_passwd &&
371 *psz_socks_user && *psz_socks_passwd )
374 buffer[0] = i_socks_version; /* SOCKS version */
377 buffer[1] = 2; /* Number of methods */
378 buffer[2] = 0x00; /* - No auth required */
379 buffer[3] = 0x02; /* - USer/Password */
384 buffer[1] = 1; /* Number of methods */
385 buffer[2] = 0x00; /* - No auth required */
389 if( net_Write( p_obj, fd, NULL, buffer, i_len ) != i_len )
391 if( net_Read( p_obj, fd, NULL, buffer, 2, VLC_TRUE ) != 2 )
394 msg_Dbg( p_obj, "socks: v=%d method=%x", buffer[0], buffer[1] );
396 if( buffer[1] == 0x00 )
398 msg_Dbg( p_obj, "socks: no authentication required" );
400 else if( buffer[1] == 0x02 )
402 int i_len1 = __MIN( strlen(psz_socks_user), 255 );
403 int i_len2 = __MIN( strlen(psz_socks_passwd), 255 );
404 msg_Dbg( p_obj, "socks: username/password authentication" );
406 /* XXX: we don't support user/pwd > 255 (truncated)*/
407 buffer[0] = i_socks_version; /* Version */
408 buffer[1] = i_len1; /* User length */
409 memcpy( &buffer[2], psz_socks_user, i_len1 );
410 buffer[2+i_len1] = i_len2; /* Password length */
411 memcpy( &buffer[2+i_len1+1], psz_socks_passwd, i_len2 );
413 i_len = 3 + i_len1 + i_len2;
415 if( net_Write( p_obj, fd, NULL, buffer, i_len ) != i_len )
418 if( net_Read( p_obj, fd, NULL, buffer, 2, VLC_TRUE ) != 2 )
421 msg_Dbg( p_obj, "socks: v=%d status=%x", buffer[0], buffer[1] );
422 if( buffer[1] != 0x00 )
424 msg_Err( p_obj, "socks: authentication rejected" );
431 msg_Err( p_obj, "socks: unsupported authentication method %x",
434 msg_Err( p_obj, "socks: authentification needed" );
441 /*****************************************************************************
443 *****************************************************************************
444 * Open a TCP connection using a SOCKS server and return a handle (RFC 1928)
445 *****************************************************************************/
446 static int SocksHandshakeTCP( vlc_object_t *p_obj,
449 char *psz_socks_user, char *psz_socks_passwd,
450 const char *psz_host, int i_port )
452 uint8_t buffer[128+2*256];
454 if( i_socks_version != 4 && i_socks_version != 5 )
456 msg_Warn( p_obj, "invalid socks protocol version %d", i_socks_version );
460 if( i_socks_version == 5 &&
461 SocksNegociate( p_obj, fd, i_socks_version,
462 psz_socks_user, psz_socks_passwd ) )
465 if( i_socks_version == 4 )
467 struct addrinfo hints, *p_res;
469 /* v4 only support ipv4 */
470 memset (&hints, 0, sizeof (hints));
471 hints.ai_family = AF_INET;
472 if( vlc_getaddrinfo( p_obj, psz_host, 0, &hints, &p_res ) )
475 buffer[0] = i_socks_version;
476 buffer[1] = 0x01; /* CONNECT */
477 SetWBE( &buffer[2], i_port ); /* Port */
478 memcpy( &buffer[4], /* Address */
479 &((struct sockaddr_in *)(p_res->ai_addr))->sin_addr, 4 );
480 vlc_freeaddrinfo( p_res );
482 buffer[8] = 0; /* Empty user id */
484 if( net_Write( p_obj, fd, NULL, buffer, 9 ) != 9 )
486 if( net_Read( p_obj, fd, NULL, buffer, 8, VLC_TRUE ) != 8 )
489 msg_Dbg( p_obj, "socks: v=%d cd=%d",
490 buffer[0], buffer[1] );
492 if( buffer[1] != 90 )
495 else if( i_socks_version == 5 )
497 int i_hlen = __MIN(strlen( psz_host ), 255);
500 buffer[0] = i_socks_version; /* Version */
501 buffer[1] = 0x01; /* Cmd: connect */
502 buffer[2] = 0x00; /* Reserved */
503 buffer[3] = 3; /* ATYP: for now domainname */
506 memcpy( &buffer[5], psz_host, i_hlen );
507 SetWBE( &buffer[5+i_hlen], i_port );
509 i_len = 5 + i_hlen + 2;
512 if( net_Write( p_obj, fd, NULL, buffer, i_len ) != i_len )
515 /* Read the header */
516 if( net_Read( p_obj, fd, NULL, buffer, 5, VLC_TRUE ) != 5 )
519 msg_Dbg( p_obj, "socks: v=%d rep=%d atyp=%d",
520 buffer[0], buffer[1], buffer[3] );
522 if( buffer[1] != 0x00 )
524 msg_Err( p_obj, "socks: CONNECT request failed\n" );
528 /* Read the remaining bytes */
529 if( buffer[3] == 0x01 )
531 else if( buffer[3] == 0x03 )
532 i_len = buffer[4] + 2;
533 else if( buffer[3] == 0x04 )
538 if( net_Read( p_obj, fd, NULL, buffer, i_len, VLC_TRUE ) != i_len )
545 void net_ListenClose( int *pi_fd )
551 for( pi = pi_fd; *pi != -1; pi++ )