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 EWOULDBLOCK WSAEWOULDBLOCK
58 # define EINTR WSAEINTR
60 # define ETIMEDOUT WSAETIMEDOUT
63 #include "libvlc.h" /* vlc_object_waitpipe */
65 static int SocksNegotiate( vlc_object_t *, int fd, int i_socks_version,
66 const char *psz_user, const char *psz_passwd );
67 static int SocksHandshakeTCP( vlc_object_t *,
68 int fd, int i_socks_version,
69 const char *psz_user, const char *psz_passwd,
70 const char *psz_host, int i_port );
71 extern int net_Socket( vlc_object_t *p_this, int i_family, int i_socktype,
74 /*****************************************************************************
76 *****************************************************************************
77 * Open a network connection.
78 * @return socket handler or -1 on error.
79 *****************************************************************************/
80 int __net_Connect( vlc_object_t *p_this, const char *psz_host, int i_port,
83 struct addrinfo hints, *res, *ptr;
84 const char *psz_realhost;
86 int i_realport, i_val, i_handle = -1;
88 int evfd = vlc_object_waitpipe (p_this);
92 memset( &hints, 0, sizeof( hints ) );
93 hints.ai_socktype = SOCK_STREAM;
95 psz_socks = var_CreateGetNonEmptyString( p_this, "socks" );
96 if( psz_socks != NULL )
98 char *psz = strchr( psz_socks, ':' );
103 psz_realhost = psz_socks;
104 i_realport = ( psz != NULL ) ? atoi( psz ) : 1080;
105 hints.ai_flags &= ~AI_NUMERICHOST;
107 msg_Dbg( p_this, "net: connecting to %s port %d (SOCKS) "
108 "for %s port %d", psz_realhost, i_realport,
111 /* We only implement TCP with SOCKS */
119 msg_Err( p_this, "Socket type not supported through SOCKS" );
130 msg_Err( p_this, "Transport not supported through SOCKS" );
137 psz_realhost = psz_host;
140 msg_Dbg( p_this, "net: connecting to %s port %d", psz_realhost,
144 i_val = vlc_getaddrinfo( p_this, psz_realhost, i_realport, &hints, &res );
149 msg_Err( p_this, "cannot resolve %s port %d : %s", psz_realhost,
150 i_realport, vlc_gai_strerror( i_val ) );
154 for( ptr = res; ptr != NULL; ptr = ptr->ai_next )
156 int fd = net_Socket( p_this, ptr->ai_family, type ?: ptr->ai_socktype,
157 proto ?: ptr->ai_protocol );
160 msg_Dbg( p_this, "socket error: %m" );
164 if( connect( fd, ptr->ai_addr, ptr->ai_addrlen ) )
168 if( net_errno != EINPROGRESS && net_errno != EINTR )
170 msg_Err( p_this, "connection failed: %m" );
173 msg_Dbg( p_this, "connection: %m" );
175 timeout = var_CreateGetInteger (p_this, "ipv4-timeout");
178 msg_Err( p_this, "invalid negative value for ipv4-timeout" );
182 struct pollfd ufd[2] = {
183 { .fd = fd, .events = POLLOUT },
184 { .fd = evfd, .events = POLLIN },
188 /* NOTE: timeout screwed up if we catch a signal (EINTR) */
189 val = poll (ufd, sizeof (ufd) / sizeof (ufd[0]), timeout);
190 while ((val == -1) && (net_errno == EINTR));
195 msg_Err (p_this, "connection polling error: %m");
198 case 0: /* timeout */
199 msg_Warn (p_this, "connection timed out");
202 default: /* something happended */
204 goto next_ai; /* LibVLC object killed */
207 /* There is NO WAY around checking SO_ERROR.
208 * Don't ifdef it out!!! */
209 if (getsockopt (fd, SOL_SOCKET, SO_ERROR, &val,
210 &(socklen_t){ sizeof (val) }) || val)
213 msg_Err (p_this, "connection failed: %m");
218 msg_Dbg( p_this, "connection succeeded (socket = %d)", fd );
219 i_handle = fd; /* success! */
222 next_ai: /* failure */
227 vlc_freeaddrinfo( res );
232 if( psz_socks != NULL )
234 /* NOTE: psz_socks already free'd! */
235 char *psz_user = var_CreateGetNonEmptyString( p_this, "socks-user" );
236 char *psz_pwd = var_CreateGetNonEmptyString( p_this, "socks-pwd" );
238 if( SocksHandshakeTCP( p_this, i_handle, 5, psz_user, psz_pwd,
241 msg_Err( p_this, "SOCKS handshake failed" );
242 net_Close( i_handle );
254 int net_AcceptSingle (vlc_object_t *obj, int lfd)
258 fd = accept (lfd, NULL, NULL);
259 while (fd == -1 && errno == EINTR);
263 if (net_errno != EAGAIN && net_errno != EWOULDBLOCK)
264 msg_Err (obj, "accept failed (from socket %d): %m", lfd);
268 msg_Dbg (obj, "accepted socket %d (from socket %d)", fd, lfd);
269 net_SetupSocket (fd);
274 /*****************************************************************************
276 *****************************************************************************
277 * Accept a connection on a set of listening sockets and return it
278 *****************************************************************************/
279 int __net_Accept( vlc_object_t *p_this, int *pi_fd, mtime_t i_wait )
281 int timeout = (i_wait < 0) ? -1 : i_wait / 1000;
282 int evfd = vlc_object_waitpipe (p_this);
284 assert( pi_fd != NULL );
289 while (pi_fd[n] != -1)
291 struct pollfd ufd[n + 1];
293 /* Initialize file descriptor set */
294 for (unsigned i = 0; i <= n; i++)
296 ufd[i].fd = (i < n) ? pi_fd[i] : evfd;
297 ufd[i].events = POLLIN;
301 n--; /* avoid EBADF */
303 switch (poll (ufd, n, timeout))
306 if (net_errno == EINTR)
308 msg_Err (p_this, "poll error: %m");
321 for (unsigned i = 0; i < n; i++)
323 if (ufd[i].revents == 0)
327 int fd = net_AcceptSingle (p_this, sfd);
332 * Move listening socket to the end to let the others in the
333 * set a chance next time.
335 memmove (pi_fd + i, pi_fd + i + 1, n - (i + 1));
344 /*****************************************************************************
346 *****************************************************************************
347 * Negotiate authentication with a SOCKS server.
348 *****************************************************************************/
349 static int SocksNegotiate( vlc_object_t *p_obj,
350 int fd, int i_socks_version,
351 const char *psz_socks_user,
352 const char *psz_socks_passwd )
354 uint8_t buffer[128+2*256];
358 if( i_socks_version != 5 )
361 /* We negotiate authentication */
363 if( ( psz_socks_user == NULL ) && ( psz_socks_passwd == NULL ) )
366 buffer[0] = i_socks_version; /* SOCKS version */
369 buffer[1] = 2; /* Number of methods */
370 buffer[2] = 0x00; /* - No auth required */
371 buffer[3] = 0x02; /* - USer/Password */
376 buffer[1] = 1; /* Number of methods */
377 buffer[2] = 0x00; /* - No auth required */
381 if( net_Write( p_obj, fd, NULL, buffer, i_len ) != i_len )
383 if( net_Read( p_obj, fd, NULL, buffer, 2, true ) != 2 )
386 msg_Dbg( p_obj, "socks: v=%d method=%x", buffer[0], buffer[1] );
388 if( buffer[1] == 0x00 )
390 msg_Dbg( p_obj, "socks: no authentication required" );
392 else if( buffer[1] == 0x02 )
394 int i_len1 = __MIN( strlen(psz_socks_user), 255 );
395 int i_len2 = __MIN( strlen(psz_socks_passwd), 255 );
396 msg_Dbg( p_obj, "socks: username/password authentication" );
398 /* XXX: we don't support user/pwd > 255 (truncated)*/
399 buffer[0] = i_socks_version; /* Version */
400 buffer[1] = i_len1; /* User length */
401 memcpy( &buffer[2], psz_socks_user, i_len1 );
402 buffer[2+i_len1] = i_len2; /* Password length */
403 memcpy( &buffer[2+i_len1+1], psz_socks_passwd, i_len2 );
405 i_len = 3 + i_len1 + i_len2;
407 if( net_Write( p_obj, fd, NULL, buffer, i_len ) != i_len )
410 if( net_Read( p_obj, fd, NULL, buffer, 2, true ) != 2 )
413 msg_Dbg( p_obj, "socks: v=%d status=%x", buffer[0], buffer[1] );
414 if( buffer[1] != 0x00 )
416 msg_Err( p_obj, "socks: authentication rejected" );
423 msg_Err( p_obj, "socks: unsupported authentication method %x",
426 msg_Err( p_obj, "socks: authentification needed" );
433 /*****************************************************************************
435 *****************************************************************************
436 * Open a TCP connection using a SOCKS server and return a handle (RFC 1928)
437 *****************************************************************************/
438 static int SocksHandshakeTCP( vlc_object_t *p_obj,
441 const char *psz_user, const char *psz_passwd,
442 const char *psz_host, int i_port )
444 uint8_t buffer[128+2*256];
446 if( i_socks_version != 4 && i_socks_version != 5 )
448 msg_Warn( p_obj, "invalid socks protocol version %d", i_socks_version );
452 if( i_socks_version == 5 &&
453 SocksNegotiate( p_obj, fd, i_socks_version,
454 psz_user, psz_passwd ) )
457 if( i_socks_version == 4 )
459 struct addrinfo hints, *p_res;
461 /* v4 only support ipv4 */
462 memset (&hints, 0, sizeof (hints));
463 hints.ai_family = AF_INET;
464 if( vlc_getaddrinfo( p_obj, psz_host, 0, &hints, &p_res ) )
467 buffer[0] = i_socks_version;
468 buffer[1] = 0x01; /* CONNECT */
469 SetWBE( &buffer[2], i_port ); /* Port */
470 memcpy( &buffer[4], /* Address */
471 &((struct sockaddr_in *)(p_res->ai_addr))->sin_addr, 4 );
472 vlc_freeaddrinfo( p_res );
474 buffer[8] = 0; /* Empty user id */
476 if( net_Write( p_obj, fd, NULL, buffer, 9 ) != 9 )
478 if( net_Read( p_obj, fd, NULL, buffer, 8, true ) != 8 )
481 msg_Dbg( p_obj, "socks: v=%d cd=%d",
482 buffer[0], buffer[1] );
484 if( buffer[1] != 90 )
487 else if( i_socks_version == 5 )
489 int i_hlen = __MIN(strlen( psz_host ), 255);
492 buffer[0] = i_socks_version; /* Version */
493 buffer[1] = 0x01; /* Cmd: connect */
494 buffer[2] = 0x00; /* Reserved */
495 buffer[3] = 3; /* ATYP: for now domainname */
498 memcpy( &buffer[5], psz_host, i_hlen );
499 SetWBE( &buffer[5+i_hlen], i_port );
501 i_len = 5 + i_hlen + 2;
504 if( net_Write( p_obj, fd, NULL, buffer, i_len ) != i_len )
507 /* Read the header */
508 if( net_Read( p_obj, fd, NULL, buffer, 5, true ) != 5 )
511 msg_Dbg( p_obj, "socks: v=%d rep=%d atyp=%d",
512 buffer[0], buffer[1], buffer[3] );
514 if( buffer[1] != 0x00 )
516 msg_Err( p_obj, "socks: CONNECT request failed\n" );
520 /* Read the remaining bytes */
521 if( buffer[3] == 0x01 )
523 else if( buffer[3] == 0x03 )
524 i_len = buffer[4] + 2;
525 else if( buffer[3] == 0x04 )
530 if( net_Read( p_obj, fd, NULL, buffer, i_len, true ) != i_len )
537 void net_ListenClose( int *pi_fd )
543 for( pi = pi_fd; *pi != -1; pi++ )