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 *****************************************************************************/
33 #include <vlc_common.h>
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 SocksNegotiate( 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;
84 int evfd = vlc_object_waitpipe (p_this);
88 memset( &hints, 0, sizeof( hints ) );
89 hints.ai_socktype = SOCK_STREAM;
91 psz_socks = var_CreateGetNonEmptyString( p_this, "socks" );
92 if( psz_socks != NULL )
94 char *psz = strchr( psz_socks, ':' );
99 psz_realhost = psz_socks;
100 i_realport = ( psz != NULL ) ? atoi( psz ) : 1080;
101 hints.ai_flags &= ~AI_NUMERICHOST;
103 msg_Dbg( p_this, "net: connecting to %s port %d (SOCKS) "
104 "for %s port %d", psz_realhost, i_realport,
107 /* We only implement TCP with SOCKS */
115 msg_Err( p_this, "Socket type not supported through SOCKS" );
126 msg_Err( p_this, "Transport not supported through SOCKS" );
133 psz_realhost = psz_host;
136 msg_Dbg( p_this, "net: connecting to %s port %d", psz_realhost,
140 i_val = vlc_getaddrinfo( p_this, psz_realhost, i_realport, &hints, &res );
145 msg_Err( p_this, "cannot resolve %s port %d : %s", psz_realhost,
146 i_realport, vlc_gai_strerror( i_val ) );
150 for( ptr = res; ptr != NULL; ptr = ptr->ai_next )
152 int fd = net_Socket( p_this, ptr->ai_family, type ?: ptr->ai_socktype,
153 proto ?: ptr->ai_protocol );
156 msg_Dbg( p_this, "socket error: %m" );
160 if( connect( fd, ptr->ai_addr, ptr->ai_addrlen ) )
164 if( net_errno != EINPROGRESS && net_errno != EINTR )
166 msg_Err( p_this, "connection failed: %m" );
169 msg_Dbg( p_this, "connection: %m" );
171 timeout = var_CreateGetInteger (p_this, "ipv4-timeout");
174 msg_Err( p_this, "invalid negative value for ipv4-timeout" );
178 struct pollfd ufd[2] = {
179 { .fd = fd, .events = POLLOUT },
180 { .fd = evfd, .events = POLLIN },
184 /* NOTE: timeout screwed up if we catch a signal (EINTR) */
185 val = poll (ufd, sizeof (ufd) / sizeof (ufd[0]), timeout);
186 while ((val == -1) && (net_errno == EINTR));
191 msg_Err (p_this, "connection polling error: %m");
194 case 0: /* timeout */
195 msg_Warn (p_this, "connection timed out");
198 default: /* something happended */
200 goto next_ai; /* LibVLC object killed */
203 /* There is NO WAY around checking SO_ERROR.
204 * Don't ifdef it out!!! */
205 if (getsockopt (fd, SOL_SOCKET, SO_ERROR, &val,
206 &(socklen_t){ sizeof (val) }) || val)
209 msg_Err (p_this, "connection failed: %m");
214 msg_Dbg( p_this, "connection succeeded (socket = %d)", fd );
215 i_handle = fd; /* success! */
218 next_ai: /* failure */
223 vlc_freeaddrinfo( res );
228 if( psz_socks != NULL )
230 /* NOTE: psz_socks already free'd! */
231 char *psz_user = var_CreateGetNonEmptyString( p_this, "socks-user" );
232 char *psz_pwd = var_CreateGetNonEmptyString( p_this, "socks-pwd" );
234 if( SocksHandshakeTCP( p_this, i_handle, 5, psz_user, psz_pwd,
237 msg_Err( p_this, "SOCKS handshake failed" );
238 net_Close( i_handle );
250 int net_AcceptSingle (vlc_object_t *obj, int lfd)
254 fd = accept (lfd, NULL, NULL);
255 while (fd == -1 && errno == EINTR);
259 if (net_errno != EAGAIN)
260 msg_Err (obj, "accept failed (from socket %d): %m", lfd);
264 msg_Dbg (obj, "accepted socket %d (from socket %d)", fd, lfd);
265 net_SetupSocket (fd);
270 /*****************************************************************************
272 *****************************************************************************
273 * Accept a connection on a set of listening sockets and return it
274 *****************************************************************************/
275 int __net_Accept( vlc_object_t *p_this, int *pi_fd, mtime_t i_wait )
277 int timeout = (i_wait < 0) ? -1 : i_wait / 1000;
278 int evfd = vlc_object_waitpipe (p_this);
283 assert( pi_fd != NULL );
288 while (pi_fd[n] != -1)
290 struct pollfd ufd[n + 1];
292 /* Initialize file descriptor set */
293 for (unsigned i = 0; i <= n; i++)
295 ufd[i].fd = (i < n) ? pi_fd[i] : evfd;
296 ufd[i].events = POLLIN;
300 n--; /* avoid EBADF */
302 switch (poll (ufd, n, timeout))
305 if (net_errno == EINTR)
307 msg_Err (p_this, "poll error: %m");
320 for (unsigned i = 0; i < n; i++)
322 if (ufd[i].revents == 0)
326 int fd = net_AcceptSingle (p_this, sfd);
331 * Move listening socket to the end to let the others in the
332 * set a chance next time.
334 memmove (pi_fd + i, pi_fd + i + 1, n - (i + 1));
343 /*****************************************************************************
345 *****************************************************************************
346 * Negotiate authentication with a SOCKS server.
347 *****************************************************************************/
348 static int SocksNegotiate( vlc_object_t *p_obj,
349 int fd, int i_socks_version,
350 const char *psz_socks_user,
351 const char *psz_socks_passwd )
353 uint8_t buffer[128+2*256];
357 if( i_socks_version != 5 )
360 /* We negotiate authentication */
362 if( ( psz_socks_user == NULL ) && ( psz_socks_passwd == NULL ) )
365 buffer[0] = i_socks_version; /* SOCKS version */
368 buffer[1] = 2; /* Number of methods */
369 buffer[2] = 0x00; /* - No auth required */
370 buffer[3] = 0x02; /* - USer/Password */
375 buffer[1] = 1; /* Number of methods */
376 buffer[2] = 0x00; /* - No auth required */
380 if( net_Write( p_obj, fd, NULL, buffer, i_len ) != i_len )
382 if( net_Read( p_obj, fd, NULL, buffer, 2, true ) != 2 )
385 msg_Dbg( p_obj, "socks: v=%d method=%x", buffer[0], buffer[1] );
387 if( buffer[1] == 0x00 )
389 msg_Dbg( p_obj, "socks: no authentication required" );
391 else if( buffer[1] == 0x02 )
393 int i_len1 = __MIN( strlen(psz_socks_user), 255 );
394 int i_len2 = __MIN( strlen(psz_socks_passwd), 255 );
395 msg_Dbg( p_obj, "socks: username/password authentication" );
397 /* XXX: we don't support user/pwd > 255 (truncated)*/
398 buffer[0] = i_socks_version; /* Version */
399 buffer[1] = i_len1; /* User length */
400 memcpy( &buffer[2], psz_socks_user, i_len1 );
401 buffer[2+i_len1] = i_len2; /* Password length */
402 memcpy( &buffer[2+i_len1+1], psz_socks_passwd, i_len2 );
404 i_len = 3 + i_len1 + i_len2;
406 if( net_Write( p_obj, fd, NULL, buffer, i_len ) != i_len )
409 if( net_Read( p_obj, fd, NULL, buffer, 2, true ) != 2 )
412 msg_Dbg( p_obj, "socks: v=%d status=%x", buffer[0], buffer[1] );
413 if( buffer[1] != 0x00 )
415 msg_Err( p_obj, "socks: authentication rejected" );
422 msg_Err( p_obj, "socks: unsupported authentication method %x",
425 msg_Err( p_obj, "socks: authentification needed" );
432 /*****************************************************************************
434 *****************************************************************************
435 * Open a TCP connection using a SOCKS server and return a handle (RFC 1928)
436 *****************************************************************************/
437 static int SocksHandshakeTCP( vlc_object_t *p_obj,
440 const char *psz_user, const char *psz_passwd,
441 const char *psz_host, int i_port )
443 uint8_t buffer[128+2*256];
445 if( i_socks_version != 4 && i_socks_version != 5 )
447 msg_Warn( p_obj, "invalid socks protocol version %d", i_socks_version );
451 if( i_socks_version == 5 &&
452 SocksNegotiate( p_obj, fd, i_socks_version,
453 psz_user, psz_passwd ) )
456 if( i_socks_version == 4 )
458 struct addrinfo hints, *p_res;
460 /* v4 only support ipv4 */
461 memset (&hints, 0, sizeof (hints));
462 hints.ai_family = AF_INET;
463 if( vlc_getaddrinfo( p_obj, psz_host, 0, &hints, &p_res ) )
466 buffer[0] = i_socks_version;
467 buffer[1] = 0x01; /* CONNECT */
468 SetWBE( &buffer[2], i_port ); /* Port */
469 memcpy( &buffer[4], /* Address */
470 &((struct sockaddr_in *)(p_res->ai_addr))->sin_addr, 4 );
471 vlc_freeaddrinfo( p_res );
473 buffer[8] = 0; /* Empty user id */
475 if( net_Write( p_obj, fd, NULL, buffer, 9 ) != 9 )
477 if( net_Read( p_obj, fd, NULL, buffer, 8, true ) != 8 )
480 msg_Dbg( p_obj, "socks: v=%d cd=%d",
481 buffer[0], buffer[1] );
483 if( buffer[1] != 90 )
486 else if( i_socks_version == 5 )
488 int i_hlen = __MIN(strlen( psz_host ), 255);
491 buffer[0] = i_socks_version; /* Version */
492 buffer[1] = 0x01; /* Cmd: connect */
493 buffer[2] = 0x00; /* Reserved */
494 buffer[3] = 3; /* ATYP: for now domainname */
497 memcpy( &buffer[5], psz_host, i_hlen );
498 SetWBE( &buffer[5+i_hlen], i_port );
500 i_len = 5 + i_hlen + 2;
503 if( net_Write( p_obj, fd, NULL, buffer, i_len ) != i_len )
506 /* Read the header */
507 if( net_Read( p_obj, fd, NULL, buffer, 5, true ) != 5 )
510 msg_Dbg( p_obj, "socks: v=%d rep=%d atyp=%d",
511 buffer[0], buffer[1], buffer[3] );
513 if( buffer[1] != 0x00 )
515 msg_Err( p_obj, "socks: CONNECT request failed\n" );
519 /* Read the remaining bytes */
520 if( buffer[3] == 0x01 )
522 else if( buffer[3] == 0x03 )
523 i_len = buffer[4] + 2;
524 else if( buffer[3] == 0x04 )
529 if( net_Read( p_obj, fd, NULL, buffer, i_len, true ) != i_len )
536 void net_ListenClose( int *pi_fd )
542 for( pi = pi_fd; *pi != -1; pi++ )