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>
45 #include <vlc_network.h>
46 #if defined (WIN32) || defined (UNDER_CE)
48 # define EINPROGRESS WSAEWOULDBLOCK
50 # define EWOULDBLOCK WSAEWOULDBLOCK
52 # define EINTR WSAEINTR
54 # define ETIMEDOUT WSAETIMEDOUT
57 #include "libvlc.h" /* vlc_object_waitpipe */
59 static int SocksNegotiate( vlc_object_t *, int fd, int i_socks_version,
60 const char *psz_user, const char *psz_passwd );
61 static int SocksHandshakeTCP( vlc_object_t *,
62 int fd, int i_socks_version,
63 const char *psz_user, const char *psz_passwd,
64 const char *psz_host, int i_port );
65 extern int net_Socket( vlc_object_t *p_this, int i_family, int i_socktype,
69 /*****************************************************************************
71 *****************************************************************************
72 * Open a network connection.
73 * @return socket handler or -1 on error.
74 *****************************************************************************/
75 int net_Connect( vlc_object_t *p_this, const char *psz_host, int i_port,
78 struct addrinfo hints, *res, *ptr;
79 const char *psz_realhost;
81 int i_realport, i_val, i_handle = -1;
83 int evfd = vlc_object_waitpipe (p_this);
87 memset( &hints, 0, sizeof( hints ) );
88 hints.ai_protocol = proto;
90 psz_socks = var_CreateGetNonEmptyString( p_this, "socks" );
91 if( psz_socks != NULL )
93 char *psz = strchr( psz_socks, ':' );
98 psz_realhost = psz_socks;
99 i_realport = ( psz != NULL ) ? atoi( psz ) : 1080;
100 hints.ai_flags &= ~AI_NUMERICHOST;
102 msg_Dbg( p_this, "net: connecting to %s port %d (SOCKS) "
103 "for %s port %d", psz_realhost, i_realport,
106 /* We only implement TCP with SOCKS */
114 msg_Err( p_this, "Socket type not supported through SOCKS" );
125 msg_Err( p_this, "Transport not supported through SOCKS" );
132 psz_realhost = psz_host;
135 msg_Dbg( p_this, "net: connecting to %s port %d", psz_realhost,
139 i_val = vlc_getaddrinfo( p_this, psz_realhost, i_realport, &hints, &res );
144 msg_Err( p_this, "cannot resolve %s port %d : %s", psz_realhost,
145 i_realport, vlc_gai_strerror( i_val ) );
149 int timeout = var_InheritInteger (p_this, "ipv4-timeout");
153 for( ptr = res; ptr != NULL; ptr = ptr->ai_next )
155 int fd = net_Socket( p_this, ptr->ai_family,
156 ptr->ai_socktype, ptr->ai_protocol );
159 msg_Dbg( p_this, "socket error: %m" );
163 if( connect( fd, ptr->ai_addr, ptr->ai_addrlen ) )
167 if( net_errno != EINPROGRESS && net_errno != EINTR )
169 msg_Err( p_this, "connection failed: %m" );
173 struct pollfd ufd[2] = {
174 { .fd = fd, .events = POLLOUT },
175 { .fd = evfd, .events = POLLIN },
179 /* NOTE: timeout screwed up if we catch a signal (EINTR) */
180 val = poll (ufd, sizeof (ufd) / sizeof (ufd[0]), timeout);
181 while ((val == -1) && (net_errno == EINTR));
186 msg_Err (p_this, "connection polling error: %m");
189 case 0: /* timeout */
190 msg_Warn (p_this, "connection timed out");
193 default: /* something happended */
195 goto next_ai; /* LibVLC object killed */
198 /* There is NO WAY around checking SO_ERROR.
199 * Don't ifdef it out!!! */
200 if (getsockopt (fd, SOL_SOCKET, SO_ERROR, &val,
201 &(socklen_t){ sizeof (val) }) || val)
204 msg_Err (p_this, "connection failed: %m");
209 msg_Dbg( p_this, "connection succeeded (socket = %d)", fd );
210 i_handle = fd; /* success! */
213 next_ai: /* failure */
218 vlc_freeaddrinfo( res );
223 if( psz_socks != NULL )
225 /* NOTE: psz_socks already free'd! */
226 char *psz_user = var_CreateGetNonEmptyString( p_this, "socks-user" );
227 char *psz_pwd = var_CreateGetNonEmptyString( p_this, "socks-pwd" );
229 if( SocksHandshakeTCP( p_this, i_handle, 5, psz_user, psz_pwd,
232 msg_Err( p_this, "SOCKS handshake failed" );
233 net_Close( i_handle );
245 int net_AcceptSingle (vlc_object_t *obj, int lfd)
252 fd = accept4 (lfd, NULL, NULL, SOCK_CLOEXEC);
253 if (fd == -1 && errno == ENOSYS)
255 fd = accept (lfd, NULL, NULL);
257 while (fd == -1 && errno == EINTR);
261 if (net_errno != EAGAIN && net_errno != EWOULDBLOCK)
262 msg_Err (obj, "accept failed (from socket %d): %m", lfd);
266 msg_Dbg (obj, "accepted socket %d (from socket %d)", fd, lfd);
267 net_SetupSocket (fd);
274 * Accepts an new connection on a set of listening sockets.
275 * If there are no pending connections, this function will wait.
276 * @note If the thread needs to handle events other than incoming connections,
277 * you need to use poll() and net_AcceptSingle() instead.
279 * @param p_this VLC object for logging and object kill signal
280 * @param pi_fd listening socket set
281 * @return -1 on error (may be transient error due to network issues),
282 * a new socket descriptor on success.
284 int net_Accept (vlc_object_t *p_this, int *pi_fd)
286 int evfd = vlc_object_waitpipe (p_this);
288 assert (pi_fd != NULL);
291 while (pi_fd[n] != -1)
293 struct pollfd ufd[n + 1];
295 /* Initialize file descriptor set */
296 for (unsigned i = 0; i <= n; i++)
298 ufd[i].fd = (i < n) ? pi_fd[i] : evfd;
299 ufd[i].events = POLLIN;
305 while (poll (ufd, n + (evfd != -1), -1) == -1)
307 if (net_errno != EINTR)
309 msg_Err (p_this, "poll error: %m");
314 for (unsigned i = 0; i < n; i++)
316 if (ufd[i].revents == 0)
320 int fd = net_AcceptSingle (p_this, sfd);
325 * Move listening socket to the end to let the others in the
326 * set a chance next time.
328 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: authentication 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 hints.ai_socktype = SOCK_STREAM;
464 hints.ai_protocol = IPPROTO_TCP;
465 if( vlc_getaddrinfo( p_obj, psz_host, 0, &hints, &p_res ) )
468 buffer[0] = i_socks_version;
469 buffer[1] = 0x01; /* CONNECT */
470 SetWBE( &buffer[2], i_port ); /* Port */
471 memcpy( &buffer[4], /* Address */
472 &((struct sockaddr_in *)(p_res->ai_addr))->sin_addr, 4 );
473 vlc_freeaddrinfo( p_res );
475 buffer[8] = 0; /* Empty user id */
477 if( net_Write( p_obj, fd, NULL, buffer, 9 ) != 9 )
479 if( net_Read( p_obj, fd, NULL, buffer, 8, true ) != 8 )
482 msg_Dbg( p_obj, "socks: v=%d cd=%d",
483 buffer[0], buffer[1] );
485 if( buffer[1] != 90 )
488 else if( i_socks_version == 5 )
490 int i_hlen = __MIN(strlen( psz_host ), 255);
493 buffer[0] = i_socks_version; /* Version */
494 buffer[1] = 0x01; /* Cmd: connect */
495 buffer[2] = 0x00; /* Reserved */
496 buffer[3] = 3; /* ATYP: for now domainname */
499 memcpy( &buffer[5], psz_host, i_hlen );
500 SetWBE( &buffer[5+i_hlen], i_port );
502 i_len = 5 + i_hlen + 2;
505 if( net_Write( p_obj, fd, NULL, buffer, i_len ) != i_len )
508 /* Read the header */
509 if( net_Read( p_obj, fd, NULL, buffer, 5, true ) != 5 )
512 msg_Dbg( p_obj, "socks: v=%d rep=%d atyp=%d",
513 buffer[0], buffer[1], buffer[3] );
515 if( buffer[1] != 0x00 )
517 msg_Err( p_obj, "socks: CONNECT request failed" );
521 /* Read the remaining bytes */
522 if( buffer[3] == 0x01 )
524 else if( buffer[3] == 0x03 )
525 i_len = buffer[4] + 2;
526 else if( buffer[3] == 0x04 )
531 if( net_Read( p_obj, fd, NULL, buffer, i_len, true ) != i_len )
538 void net_ListenClose( int *pi_fd )
544 for( pi = pi_fd; *pi != -1; pi++ )