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 );
140 if( net_errno != EINPROGRESS )
145 i_saved_errno = net_errno;
147 msg_Dbg( p_this, "connect error: %s", strerror( net_errno ) );
151 var_Create( p_this, "ipv4-timeout",
152 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
153 var_Get( p_this, "ipv4-timeout", &timeout );
154 if( timeout.i_int < 0 )
156 msg_Err( p_this, "invalid negative value for ipv4-timeout" );
159 d = div( timeout.i_int, 100 );
161 msg_Dbg( p_this, "connection in progress" );
164 struct pollfd ufd = { .fd = fd, .events = POLLOUT };
169 msg_Dbg( p_this, "connection aborted" );
171 vlc_freeaddrinfo( res );
177 * We'll wait 0.1 second if nothing happens
179 * time out will be shortened if we catch a signal (EINTR)
181 i_ret = poll (&ufd, 1, (d.quot > 0) ? 100 : d.rem);
185 if( ( i_ret == -1 ) && ( net_errno != EINTR ) )
187 msg_Warn( p_this, "select error: %s",
188 strerror( net_errno ) );
194 msg_Dbg( p_this, "select timed out" );
198 i_saved_errno = ETIMEDOUT;
206 #if !defined( SYS_BEOS ) && !defined( UNDER_CE )
207 if( getsockopt( fd, SOL_SOCKET, SO_ERROR, (void*)&i_val,
208 &i_val_size ) == -1 || i_val != 0 )
211 i_saved_errno = i_val;
212 msg_Dbg( p_this, "connect error (via getsockopt): %s",
213 net_strerror( i_val ) );
219 i_handle = fd; /* success! */
222 next_ai: /* failure */
227 vlc_freeaddrinfo( res );
231 msg_Err( p_this, "Connection to %s port %d failed: %s", psz_host,
232 i_port, net_strerror( i_saved_errno ) );
237 if( *psz_socks && *psz_socks != ':' )
239 char *psz_user = var_CreateGetString( p_this, "socks-user" );
240 char *psz_pwd = var_CreateGetString( p_this, "socks-pwd" );
242 if( SocksHandshakeTCP( p_this, i_handle, 5, psz_user, psz_pwd,
245 msg_Err( p_this, "Failed to use the SOCKS server" );
246 net_Close( i_handle );
259 /*****************************************************************************
261 *****************************************************************************
262 * Accept a connection on a set of listening sockets and return it
263 *****************************************************************************/
264 int __net_Accept( vlc_object_t *p_this, int pi_fd[], mtime_t i_wait )
266 vlc_bool_t b_block = (i_wait < 0);
268 while( !p_this->b_die )
271 while (pi_fd[n] != -1)
273 struct pollfd ufd[n];
275 /* Initialize file descriptor set */
276 for (unsigned i = 0; i < n; i++)
278 ufd[i].fd = pi_fd[i];
279 ufd[i].events = POLLIN;
283 switch (poll (ufd, n, b_block ? 500 : i_wait))
286 if (net_errno != EINTR)
288 msg_Err (p_this, "poll error: %s",
289 net_strerror (net_errno));
299 for (unsigned i = 0; i < n; i++)
301 if (ufd[i].revents == 0)
305 int fd = accept (sfd, NULL, NULL);
308 msg_Err (p_this, "accept failed (%s)",
309 net_strerror (net_errno));
312 net_SetupSocket (fd);
315 * Move listening socket to the end to let the others in the
316 * set a chance next time.
318 memmove (pi_fd + i, pi_fd + i + 1, n - (i + 1));
320 msg_Dbg (p_this, "accepted socket %d (from socket %d)", fd, sfd);
329 /*****************************************************************************
331 *****************************************************************************
332 * Negociate authentication with a SOCKS server.
333 *****************************************************************************/
334 static int SocksNegociate( vlc_object_t *p_obj,
335 int fd, int i_socks_version,
336 char *psz_socks_user,
337 char *psz_socks_passwd )
339 uint8_t buffer[128+2*256];
341 vlc_bool_t b_auth = VLC_FALSE;
343 if( i_socks_version != 5 )
346 /* We negociate authentication */
348 if( psz_socks_user && psz_socks_passwd &&
349 *psz_socks_user && *psz_socks_passwd )
352 buffer[0] = i_socks_version; /* SOCKS version */
355 buffer[1] = 2; /* Number of methods */
356 buffer[2] = 0x00; /* - No auth required */
357 buffer[3] = 0x02; /* - USer/Password */
362 buffer[1] = 1; /* Number of methods */
363 buffer[2] = 0x00; /* - No auth required */
367 if( net_Write( p_obj, fd, NULL, buffer, i_len ) != i_len )
369 if( net_Read( p_obj, fd, NULL, buffer, 2, VLC_TRUE ) != 2 )
372 msg_Dbg( p_obj, "socks: v=%d method=%x", buffer[0], buffer[1] );
374 if( buffer[1] == 0x00 )
376 msg_Dbg( p_obj, "socks: no authentication required" );
378 else if( buffer[1] == 0x02 )
380 int i_len1 = __MIN( strlen(psz_socks_user), 255 );
381 int i_len2 = __MIN( strlen(psz_socks_passwd), 255 );
382 msg_Dbg( p_obj, "socks: username/password authentication" );
384 /* XXX: we don't support user/pwd > 255 (truncated)*/
385 buffer[0] = i_socks_version; /* Version */
386 buffer[1] = i_len1; /* User length */
387 memcpy( &buffer[2], psz_socks_user, i_len1 );
388 buffer[2+i_len1] = i_len2; /* Password length */
389 memcpy( &buffer[2+i_len1+1], psz_socks_passwd, i_len2 );
391 i_len = 3 + i_len1 + i_len2;
393 if( net_Write( p_obj, fd, NULL, buffer, i_len ) != i_len )
396 if( net_Read( p_obj, fd, NULL, buffer, 2, VLC_TRUE ) != 2 )
399 msg_Dbg( p_obj, "socks: v=%d status=%x", buffer[0], buffer[1] );
400 if( buffer[1] != 0x00 )
402 msg_Err( p_obj, "socks: authentication rejected" );
409 msg_Err( p_obj, "socks: unsupported authentication method %x",
412 msg_Err( p_obj, "socks: authentification needed" );
419 /*****************************************************************************
421 *****************************************************************************
422 * Open a TCP connection using a SOCKS server and return a handle (RFC 1928)
423 *****************************************************************************/
424 static int SocksHandshakeTCP( vlc_object_t *p_obj,
427 char *psz_socks_user, char *psz_socks_passwd,
428 const char *psz_host, int i_port )
430 uint8_t buffer[128+2*256];
432 if( i_socks_version != 4 && i_socks_version != 5 )
434 msg_Warn( p_obj, "invalid socks protocol version %d", i_socks_version );
438 if( i_socks_version == 5 &&
439 SocksNegociate( p_obj, fd, i_socks_version,
440 psz_socks_user, psz_socks_passwd ) )
443 if( i_socks_version == 4 )
445 struct addrinfo hints, *p_res;
447 /* v4 only support ipv4 */
448 memset (&hints, 0, sizeof (hints));
449 hints.ai_family = AF_INET;
450 if( vlc_getaddrinfo( p_obj, psz_host, 0, &hints, &p_res ) )
453 buffer[0] = i_socks_version;
454 buffer[1] = 0x01; /* CONNECT */
455 SetWBE( &buffer[2], i_port ); /* Port */
456 memcpy( &buffer[4], /* Address */
457 &((struct sockaddr_in *)(p_res->ai_addr))->sin_addr, 4 );
458 vlc_freeaddrinfo( p_res );
460 buffer[8] = 0; /* Empty user id */
462 if( net_Write( p_obj, fd, NULL, buffer, 9 ) != 9 )
464 if( net_Read( p_obj, fd, NULL, buffer, 8, VLC_TRUE ) != 8 )
467 msg_Dbg( p_obj, "socks: v=%d cd=%d",
468 buffer[0], buffer[1] );
470 if( buffer[1] != 90 )
473 else if( i_socks_version == 5 )
475 int i_hlen = __MIN(strlen( psz_host ), 255);
478 buffer[0] = i_socks_version; /* Version */
479 buffer[1] = 0x01; /* Cmd: connect */
480 buffer[2] = 0x00; /* Reserved */
481 buffer[3] = 3; /* ATYP: for now domainname */
484 memcpy( &buffer[5], psz_host, i_hlen );
485 SetWBE( &buffer[5+i_hlen], i_port );
487 i_len = 5 + i_hlen + 2;
490 if( net_Write( p_obj, fd, NULL, buffer, i_len ) != i_len )
493 /* Read the header */
494 if( net_Read( p_obj, fd, NULL, buffer, 5, VLC_TRUE ) != 5 )
497 msg_Dbg( p_obj, "socks: v=%d rep=%d atyp=%d",
498 buffer[0], buffer[1], buffer[3] );
500 if( buffer[1] != 0x00 )
502 msg_Err( p_obj, "socks: CONNECT request failed\n" );
506 /* Read the remaining bytes */
507 if( buffer[3] == 0x01 )
509 else if( buffer[3] == 0x03 )
510 i_len = buffer[4] + 2;
511 else if( buffer[3] == 0x04 )
516 if( net_Read( p_obj, fd, NULL, buffer, i_len, VLC_TRUE ) != i_len )
523 void net_ListenClose( int *pi_fd )
529 for( pi = pi_fd; *pi != -1; pi++ )