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,
157 type ? type : ptr->ai_socktype,
158 proto ? proto : ptr->ai_protocol );
161 msg_Dbg( p_this, "socket error: %m" );
165 if( connect( fd, ptr->ai_addr, ptr->ai_addrlen ) )
169 if( net_errno != EINPROGRESS && net_errno != EINTR )
171 msg_Err( p_this, "connection failed: %m" );
174 msg_Dbg( p_this, "connection: %m" );
176 timeout = var_CreateGetInteger (p_this, "ipv4-timeout");
179 msg_Err( p_this, "invalid negative value for ipv4-timeout" );
183 struct pollfd ufd[2] = {
184 { .fd = fd, .events = POLLOUT },
185 { .fd = evfd, .events = POLLIN },
189 /* NOTE: timeout screwed up if we catch a signal (EINTR) */
190 val = poll (ufd, sizeof (ufd) / sizeof (ufd[0]), timeout);
191 while ((val == -1) && (net_errno == EINTR));
196 msg_Err (p_this, "connection polling error: %m");
199 case 0: /* timeout */
200 msg_Warn (p_this, "connection timed out");
203 default: /* something happended */
205 goto next_ai; /* LibVLC object killed */
208 /* There is NO WAY around checking SO_ERROR.
209 * Don't ifdef it out!!! */
210 if (getsockopt (fd, SOL_SOCKET, SO_ERROR, &val,
211 &(socklen_t){ sizeof (val) }) || val)
214 msg_Err (p_this, "connection failed: %m");
219 msg_Dbg( p_this, "connection succeeded (socket = %d)", fd );
220 i_handle = fd; /* success! */
223 next_ai: /* failure */
228 vlc_freeaddrinfo( res );
233 if( psz_socks != NULL )
235 /* NOTE: psz_socks already free'd! */
236 char *psz_user = var_CreateGetNonEmptyString( p_this, "socks-user" );
237 char *psz_pwd = var_CreateGetNonEmptyString( p_this, "socks-pwd" );
239 if( SocksHandshakeTCP( p_this, i_handle, 5, psz_user, psz_pwd,
242 msg_Err( p_this, "SOCKS handshake failed" );
243 net_Close( i_handle );
255 int net_AcceptSingle (vlc_object_t *obj, int lfd)
262 fd = accept4 (lfd, NULL, NULL, SOCK_CLOEXEC);
263 if (fd == -1 && errno == ENOSYS)
265 fd = accept (lfd, NULL, NULL);
267 while (fd == -1 && errno == EINTR);
271 if (net_errno != EAGAIN && net_errno != EWOULDBLOCK)
272 msg_Err (obj, "accept failed (from socket %d): %m", lfd);
276 msg_Dbg (obj, "accepted socket %d (from socket %d)", fd, lfd);
277 net_SetupSocket (fd);
284 * Accepts an new connection on a set of listening sockets.
285 * If there are no pending connections, this function will wait.
286 * @note If the thread needs to handle events other than incoming connections,
287 * you need to use poll() and net_AcceptSingle() instead.
289 * @param p_this VLC object for logging and object kill signal
290 * @param pi_fd listening socket set
291 * @return -1 on error (may be transient error due to network issues),
292 * a new socket descriptor on success.
294 int net_Accept (vlc_object_t *p_this, int *pi_fd)
296 int evfd = vlc_object_waitpipe (p_this);
298 assert (pi_fd != NULL);
301 while (pi_fd[n] != -1)
303 struct pollfd ufd[n + 1];
305 /* Initialize file descriptor set */
306 for (unsigned i = 0; i <= n; i++)
308 ufd[i].fd = (i < n) ? pi_fd[i] : evfd;
309 ufd[i].events = POLLIN;
315 while (poll (ufd, n + (evfd != -1), -1) == -1)
317 if (net_errno != EINTR)
319 msg_Err (p_this, "poll error: %m");
324 for (unsigned i = 0; i < n; i++)
326 if (ufd[i].revents == 0)
330 int fd = net_AcceptSingle (p_this, sfd);
335 * Move listening socket to the end to let the others in the
336 * set a chance next time.
338 memmove (pi_fd + i, pi_fd + i + 1, n - (i + 1));
353 /*****************************************************************************
355 *****************************************************************************
356 * Negotiate authentication with a SOCKS server.
357 *****************************************************************************/
358 static int SocksNegotiate( vlc_object_t *p_obj,
359 int fd, int i_socks_version,
360 const char *psz_socks_user,
361 const char *psz_socks_passwd )
363 uint8_t buffer[128+2*256];
367 if( i_socks_version != 5 )
370 /* We negotiate authentication */
372 if( ( psz_socks_user == NULL ) && ( psz_socks_passwd == NULL ) )
375 buffer[0] = i_socks_version; /* SOCKS version */
378 buffer[1] = 2; /* Number of methods */
379 buffer[2] = 0x00; /* - No auth required */
380 buffer[3] = 0x02; /* - USer/Password */
385 buffer[1] = 1; /* Number of methods */
386 buffer[2] = 0x00; /* - No auth required */
390 if( net_Write( p_obj, fd, NULL, buffer, i_len ) != i_len )
392 if( net_Read( p_obj, fd, NULL, buffer, 2, true ) != 2 )
395 msg_Dbg( p_obj, "socks: v=%d method=%x", buffer[0], buffer[1] );
397 if( buffer[1] == 0x00 )
399 msg_Dbg( p_obj, "socks: no authentication required" );
401 else if( buffer[1] == 0x02 )
403 int i_len1 = __MIN( strlen(psz_socks_user), 255 );
404 int i_len2 = __MIN( strlen(psz_socks_passwd), 255 );
405 msg_Dbg( p_obj, "socks: username/password authentication" );
407 /* XXX: we don't support user/pwd > 255 (truncated)*/
408 buffer[0] = i_socks_version; /* Version */
409 buffer[1] = i_len1; /* User length */
410 memcpy( &buffer[2], psz_socks_user, i_len1 );
411 buffer[2+i_len1] = i_len2; /* Password length */
412 memcpy( &buffer[2+i_len1+1], psz_socks_passwd, i_len2 );
414 i_len = 3 + i_len1 + i_len2;
416 if( net_Write( p_obj, fd, NULL, buffer, i_len ) != i_len )
419 if( net_Read( p_obj, fd, NULL, buffer, 2, true ) != 2 )
422 msg_Dbg( p_obj, "socks: v=%d status=%x", buffer[0], buffer[1] );
423 if( buffer[1] != 0x00 )
425 msg_Err( p_obj, "socks: authentication rejected" );
432 msg_Err( p_obj, "socks: unsupported authentication method %x",
435 msg_Err( p_obj, "socks: authentication needed" );
442 /*****************************************************************************
444 *****************************************************************************
445 * Open a TCP connection using a SOCKS server and return a handle (RFC 1928)
446 *****************************************************************************/
447 static int SocksHandshakeTCP( vlc_object_t *p_obj,
450 const char *psz_user, const char *psz_passwd,
451 const char *psz_host, int i_port )
453 uint8_t buffer[128+2*256];
455 if( i_socks_version != 4 && i_socks_version != 5 )
457 msg_Warn( p_obj, "invalid socks protocol version %d", i_socks_version );
461 if( i_socks_version == 5 &&
462 SocksNegotiate( p_obj, fd, i_socks_version,
463 psz_user, psz_passwd ) )
466 if( i_socks_version == 4 )
468 struct addrinfo hints, *p_res;
470 /* v4 only support ipv4 */
471 memset (&hints, 0, sizeof (hints));
472 hints.ai_family = AF_INET;
473 if( vlc_getaddrinfo( p_obj, psz_host, 0, &hints, &p_res ) )
476 buffer[0] = i_socks_version;
477 buffer[1] = 0x01; /* CONNECT */
478 SetWBE( &buffer[2], i_port ); /* Port */
479 memcpy( &buffer[4], /* Address */
480 &((struct sockaddr_in *)(p_res->ai_addr))->sin_addr, 4 );
481 vlc_freeaddrinfo( p_res );
483 buffer[8] = 0; /* Empty user id */
485 if( net_Write( p_obj, fd, NULL, buffer, 9 ) != 9 )
487 if( net_Read( p_obj, fd, NULL, buffer, 8, true ) != 8 )
490 msg_Dbg( p_obj, "socks: v=%d cd=%d",
491 buffer[0], buffer[1] );
493 if( buffer[1] != 90 )
496 else if( i_socks_version == 5 )
498 int i_hlen = __MIN(strlen( psz_host ), 255);
501 buffer[0] = i_socks_version; /* Version */
502 buffer[1] = 0x01; /* Cmd: connect */
503 buffer[2] = 0x00; /* Reserved */
504 buffer[3] = 3; /* ATYP: for now domainname */
507 memcpy( &buffer[5], psz_host, i_hlen );
508 SetWBE( &buffer[5+i_hlen], i_port );
510 i_len = 5 + i_hlen + 2;
513 if( net_Write( p_obj, fd, NULL, buffer, i_len ) != i_len )
516 /* Read the header */
517 if( net_Read( p_obj, fd, NULL, buffer, 5, true ) != 5 )
520 msg_Dbg( p_obj, "socks: v=%d rep=%d atyp=%d",
521 buffer[0], buffer[1], buffer[3] );
523 if( buffer[1] != 0x00 )
525 msg_Err( p_obj, "socks: CONNECT request failed" );
529 /* Read the remaining bytes */
530 if( buffer[3] == 0x01 )
532 else if( buffer[3] == 0x03 )
533 i_len = buffer[4] + 2;
534 else if( buffer[3] == 0x04 )
539 if( net_Read( p_obj, fd, NULL, buffer, i_len, true ) != i_len )
546 void net_ListenClose( int *pi_fd )
552 for( pi = pi_fd; *pi != -1; pi++ )