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,
68 /*****************************************************************************
70 *****************************************************************************
71 * Open a network connection.
72 * @return socket handler or -1 on error.
73 *****************************************************************************/
74 int __net_Connect( vlc_object_t *p_this, const char *psz_host, int i_port,
77 struct addrinfo hints, *res, *ptr;
78 const char *psz_realhost;
80 int i_realport, i_val, i_handle = -1;
82 int evfd = vlc_object_waitpipe (p_this);
86 memset( &hints, 0, sizeof( hints ) );
87 hints.ai_socktype = SOCK_STREAM;
89 psz_socks = var_CreateGetNonEmptyString( p_this, "socks" );
90 if( psz_socks != NULL )
92 char *psz = strchr( psz_socks, ':' );
97 psz_realhost = psz_socks;
98 i_realport = ( psz != NULL ) ? atoi( psz ) : 1080;
99 hints.ai_flags &= ~AI_NUMERICHOST;
101 msg_Dbg( p_this, "net: connecting to %s port %d (SOCKS) "
102 "for %s port %d", psz_realhost, i_realport,
105 /* We only implement TCP with SOCKS */
113 msg_Err( p_this, "Socket type not supported through SOCKS" );
124 msg_Err( p_this, "Transport not supported through SOCKS" );
131 psz_realhost = psz_host;
134 msg_Dbg( p_this, "net: connecting to %s port %d", psz_realhost,
138 i_val = vlc_getaddrinfo( p_this, psz_realhost, i_realport, &hints, &res );
143 msg_Err( p_this, "cannot resolve %s port %d : %s", psz_realhost,
144 i_realport, vlc_gai_strerror( i_val ) );
148 for( ptr = res; ptr != NULL; ptr = ptr->ai_next )
150 int fd = net_Socket( p_this, ptr->ai_family,
151 type ? type : ptr->ai_socktype,
152 proto ? proto : ptr->ai_protocol );
155 msg_Dbg( p_this, "socket error: %m" );
159 if( connect( fd, ptr->ai_addr, ptr->ai_addrlen ) )
163 if( net_errno != EINPROGRESS && net_errno != EINTR )
165 msg_Err( p_this, "connection failed: %m" );
168 msg_Dbg( p_this, "connection: %m" );
170 timeout = var_CreateGetInteger (p_this, "ipv4-timeout");
173 msg_Err( p_this, "invalid negative value for ipv4-timeout" );
177 struct pollfd ufd[2] = {
178 { .fd = fd, .events = POLLOUT },
179 { .fd = evfd, .events = POLLIN },
183 /* NOTE: timeout screwed up if we catch a signal (EINTR) */
184 val = poll (ufd, sizeof (ufd) / sizeof (ufd[0]), timeout);
185 while ((val == -1) && (net_errno == EINTR));
190 msg_Err (p_this, "connection polling error: %m");
193 case 0: /* timeout */
194 msg_Warn (p_this, "connection timed out");
197 default: /* something happended */
199 goto next_ai; /* LibVLC object killed */
202 /* There is NO WAY around checking SO_ERROR.
203 * Don't ifdef it out!!! */
204 if (getsockopt (fd, SOL_SOCKET, SO_ERROR, &val,
205 &(socklen_t){ sizeof (val) }) || val)
208 msg_Err (p_this, "connection failed: %m");
213 msg_Dbg( p_this, "connection succeeded (socket = %d)", fd );
214 i_handle = fd; /* success! */
217 next_ai: /* failure */
222 vlc_freeaddrinfo( res );
227 if( psz_socks != NULL )
229 /* NOTE: psz_socks already free'd! */
230 char *psz_user = var_CreateGetNonEmptyString( p_this, "socks-user" );
231 char *psz_pwd = var_CreateGetNonEmptyString( p_this, "socks-pwd" );
233 if( SocksHandshakeTCP( p_this, i_handle, 5, psz_user, psz_pwd,
236 msg_Err( p_this, "SOCKS handshake failed" );
237 net_Close( i_handle );
249 int net_AcceptSingle (vlc_object_t *obj, int lfd)
256 fd = accept4 (lfd, NULL, NULL, SOCK_CLOEXEC);
257 if (fd == -1 && errno == ENOSYS)
259 fd = accept (lfd, NULL, NULL);
261 while (fd == -1 && errno == EINTR);
265 if (net_errno != EAGAIN && net_errno != EWOULDBLOCK)
266 msg_Err (obj, "accept failed (from socket %d): %m", lfd);
270 msg_Dbg (obj, "accepted socket %d (from socket %d)", fd, lfd);
271 net_SetupSocket (fd);
278 * Accepts an new connection on a set of listening sockets.
279 * If there are no pending connections, this function will wait.
280 * @note If the thread needs to handle events other than incoming connections,
281 * you need to use poll() and net_AcceptSingle() instead.
283 * @param p_this VLC object for logging and object kill signal
284 * @param pi_fd listening socket set
285 * @return -1 on error (may be transient error due to network issues),
286 * a new socket descriptor on success.
288 int net_Accept (vlc_object_t *p_this, int *pi_fd)
290 int evfd = vlc_object_waitpipe (p_this);
292 assert (pi_fd != NULL);
295 while (pi_fd[n] != -1)
297 struct pollfd ufd[n + 1];
299 /* Initialize file descriptor set */
300 for (unsigned i = 0; i <= n; i++)
302 ufd[i].fd = (i < n) ? pi_fd[i] : evfd;
303 ufd[i].events = POLLIN;
309 while (poll (ufd, n + (evfd != -1), -1) == -1)
311 if (net_errno != EINTR)
313 msg_Err (p_this, "poll error: %m");
318 for (unsigned i = 0; i < n; i++)
320 if (ufd[i].revents == 0)
324 int fd = net_AcceptSingle (p_this, sfd);
329 * Move listening socket to the end to let the others in the
330 * set a chance next time.
332 memmove (pi_fd + i, pi_fd + i + 1, n - (i + 1));
347 /*****************************************************************************
349 *****************************************************************************
350 * Negotiate authentication with a SOCKS server.
351 *****************************************************************************/
352 static int SocksNegotiate( vlc_object_t *p_obj,
353 int fd, int i_socks_version,
354 const char *psz_socks_user,
355 const char *psz_socks_passwd )
357 uint8_t buffer[128+2*256];
361 if( i_socks_version != 5 )
364 /* We negotiate authentication */
366 if( ( psz_socks_user == NULL ) && ( psz_socks_passwd == NULL ) )
369 buffer[0] = i_socks_version; /* SOCKS version */
372 buffer[1] = 2; /* Number of methods */
373 buffer[2] = 0x00; /* - No auth required */
374 buffer[3] = 0x02; /* - USer/Password */
379 buffer[1] = 1; /* Number of methods */
380 buffer[2] = 0x00; /* - No auth required */
384 if( net_Write( p_obj, fd, NULL, buffer, i_len ) != i_len )
386 if( net_Read( p_obj, fd, NULL, buffer, 2, true ) != 2 )
389 msg_Dbg( p_obj, "socks: v=%d method=%x", buffer[0], buffer[1] );
391 if( buffer[1] == 0x00 )
393 msg_Dbg( p_obj, "socks: no authentication required" );
395 else if( buffer[1] == 0x02 )
397 int i_len1 = __MIN( strlen(psz_socks_user), 255 );
398 int i_len2 = __MIN( strlen(psz_socks_passwd), 255 );
399 msg_Dbg( p_obj, "socks: username/password authentication" );
401 /* XXX: we don't support user/pwd > 255 (truncated)*/
402 buffer[0] = i_socks_version; /* Version */
403 buffer[1] = i_len1; /* User length */
404 memcpy( &buffer[2], psz_socks_user, i_len1 );
405 buffer[2+i_len1] = i_len2; /* Password length */
406 memcpy( &buffer[2+i_len1+1], psz_socks_passwd, i_len2 );
408 i_len = 3 + i_len1 + i_len2;
410 if( net_Write( p_obj, fd, NULL, buffer, i_len ) != i_len )
413 if( net_Read( p_obj, fd, NULL, buffer, 2, true ) != 2 )
416 msg_Dbg( p_obj, "socks: v=%d status=%x", buffer[0], buffer[1] );
417 if( buffer[1] != 0x00 )
419 msg_Err( p_obj, "socks: authentication rejected" );
426 msg_Err( p_obj, "socks: unsupported authentication method %x",
429 msg_Err( p_obj, "socks: authentication needed" );
436 /*****************************************************************************
438 *****************************************************************************
439 * Open a TCP connection using a SOCKS server and return a handle (RFC 1928)
440 *****************************************************************************/
441 static int SocksHandshakeTCP( vlc_object_t *p_obj,
444 const char *psz_user, const char *psz_passwd,
445 const char *psz_host, int i_port )
447 uint8_t buffer[128+2*256];
449 if( i_socks_version != 4 && i_socks_version != 5 )
451 msg_Warn( p_obj, "invalid socks protocol version %d", i_socks_version );
455 if( i_socks_version == 5 &&
456 SocksNegotiate( p_obj, fd, i_socks_version,
457 psz_user, psz_passwd ) )
460 if( i_socks_version == 4 )
462 struct addrinfo hints, *p_res;
464 /* v4 only support ipv4 */
465 memset (&hints, 0, sizeof (hints));
466 hints.ai_family = AF_INET;
467 if( vlc_getaddrinfo( p_obj, psz_host, 0, &hints, &p_res ) )
470 buffer[0] = i_socks_version;
471 buffer[1] = 0x01; /* CONNECT */
472 SetWBE( &buffer[2], i_port ); /* Port */
473 memcpy( &buffer[4], /* Address */
474 &((struct sockaddr_in *)(p_res->ai_addr))->sin_addr, 4 );
475 vlc_freeaddrinfo( p_res );
477 buffer[8] = 0; /* Empty user id */
479 if( net_Write( p_obj, fd, NULL, buffer, 9 ) != 9 )
481 if( net_Read( p_obj, fd, NULL, buffer, 8, true ) != 8 )
484 msg_Dbg( p_obj, "socks: v=%d cd=%d",
485 buffer[0], buffer[1] );
487 if( buffer[1] != 90 )
490 else if( i_socks_version == 5 )
492 int i_hlen = __MIN(strlen( psz_host ), 255);
495 buffer[0] = i_socks_version; /* Version */
496 buffer[1] = 0x01; /* Cmd: connect */
497 buffer[2] = 0x00; /* Reserved */
498 buffer[3] = 3; /* ATYP: for now domainname */
501 memcpy( &buffer[5], psz_host, i_hlen );
502 SetWBE( &buffer[5+i_hlen], i_port );
504 i_len = 5 + i_hlen + 2;
507 if( net_Write( p_obj, fd, NULL, buffer, i_len ) != i_len )
510 /* Read the header */
511 if( net_Read( p_obj, fd, NULL, buffer, 5, true ) != 5 )
514 msg_Dbg( p_obj, "socks: v=%d rep=%d atyp=%d",
515 buffer[0], buffer[1], buffer[3] );
517 if( buffer[1] != 0x00 )
519 msg_Err( p_obj, "socks: CONNECT request failed" );
523 /* Read the remaining bytes */
524 if( buffer[3] == 0x01 )
526 else if( buffer[3] == 0x03 )
527 i_len = buffer[4] + 2;
528 else if( buffer[3] == 0x04 )
533 if( net_Read( p_obj, fd, NULL, buffer, i_len, true ) != i_len )
540 void net_ListenClose( int *pi_fd )
546 for( pi = pi_fd; *pi != -1; pi++ )