1 /*****************************************************************************
3 *****************************************************************************
4 * Copyright (C) 2004-2005 VLC authors and VideoLAN
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 it
12 * under the terms of the GNU Lesser General Public License as published by
13 * the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
21 * You should have received a copy of the GNU Lesser General Public License
22 * along with this program; if not, write to the Free Software Foundation,
23 * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
24 *****************************************************************************/
26 /*****************************************************************************
28 *****************************************************************************/
33 #include <vlc_common.h>
45 #include <vlc_network.h>
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 const char *psz_realhost;
80 int i_realport, i_handle = -1;
82 int evfd = vlc_object_waitpipe (p_this);
86 psz_socks = var_InheritString( p_this, "socks" );
87 if( psz_socks != NULL )
89 char *psz = strchr( psz_socks, ':' );
94 psz_realhost = psz_socks;
95 i_realport = ( psz != NULL ) ? atoi( psz ) : 1080;
97 msg_Dbg( p_this, "net: connecting to %s port %d (SOCKS) "
98 "for %s port %d", psz_realhost, i_realport,
101 /* We only implement TCP with SOCKS */
109 msg_Err( p_this, "Socket type not supported through SOCKS" );
120 msg_Err( p_this, "Transport not supported through SOCKS" );
127 psz_realhost = psz_host;
130 msg_Dbg( p_this, "net: connecting to %s port %d", psz_realhost,
134 struct addrinfo hints = {
136 .ai_protocol = proto,
137 .ai_flags = AI_NUMERICSERV | AI_IDN,
140 int val = vlc_getaddrinfo (psz_realhost, i_realport, &hints, &res);
145 msg_Err (p_this, "cannot resolve %s port %d : %s", psz_realhost,
146 i_realport, gai_strerror (val));
150 int timeout = var_InheritInteger (p_this, "ipv4-timeout");
154 for (struct addrinfo *ptr = res; ptr != NULL; ptr = ptr->ai_next)
156 int fd = net_Socket( p_this, ptr->ai_family,
157 ptr->ai_socktype, 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" );
174 struct pollfd ufd[2] = {
175 { .fd = fd, .events = POLLOUT },
176 { .fd = evfd, .events = POLLIN },
180 /* NOTE: timeout screwed up if we catch a signal (EINTR) */
181 val = poll (ufd, sizeof (ufd) / sizeof (ufd[0]), timeout);
182 while ((val == -1) && (net_errno == EINTR));
187 msg_Err (p_this, "connection polling error: %m");
190 case 0: /* timeout */
191 msg_Warn (p_this, "connection timed out");
194 default: /* something happended */
196 goto next_ai; /* LibVLC object killed */
199 /* There is NO WAY around checking SO_ERROR.
200 * Don't ifdef it out!!! */
201 if (getsockopt (fd, SOL_SOCKET, SO_ERROR, &val,
202 &(socklen_t){ sizeof (val) }) || val)
205 msg_Err (p_this, "connection failed: %m");
210 msg_Dbg( p_this, "connection succeeded (socket = %d)", fd );
211 i_handle = fd; /* success! */
214 next_ai: /* failure */
224 if( psz_socks != NULL )
226 /* NOTE: psz_socks already free'd! */
227 char *psz_user = var_InheritString( p_this, "socks-user" );
228 char *psz_pwd = var_InheritString( p_this, "socks-pwd" );
230 if( SocksHandshakeTCP( p_this, i_handle, 5, psz_user, psz_pwd,
233 msg_Err( p_this, "SOCKS handshake failed" );
234 net_Close( i_handle );
246 int net_AcceptSingle (vlc_object_t *obj, int lfd)
248 int fd = vlc_accept (lfd, NULL, NULL, true);
251 if (net_errno != EAGAIN && net_errno != EWOULDBLOCK)
252 msg_Err (obj, "accept failed (from socket %d): %m", lfd);
256 msg_Dbg (obj, "accepted socket %d (from socket %d)", fd, lfd);
257 setsockopt (fd, SOL_SOCKET, SO_REUSEADDR, &(int){ 1 }, sizeof(int));
264 * Accepts an new connection on a set of listening sockets.
265 * If there are no pending connections, this function will wait.
266 * @note If the thread needs to handle events other than incoming connections,
267 * you need to use poll() and net_AcceptSingle() instead.
269 * @param p_this VLC object for logging and object kill signal
270 * @param pi_fd listening socket set
271 * @return -1 on error (may be transient error due to network issues),
272 * a new socket descriptor on success.
274 int net_Accept (vlc_object_t *p_this, int *pi_fd)
276 int evfd = vlc_object_waitpipe (p_this);
278 assert (pi_fd != NULL);
281 while (pi_fd[n] != -1)
283 struct pollfd ufd[n + 1];
285 /* Initialize file descriptor set */
286 for (unsigned i = 0; i <= n; i++)
288 ufd[i].fd = (i < n) ? pi_fd[i] : evfd;
289 ufd[i].events = POLLIN;
295 while (poll (ufd, n + (evfd != -1), -1) == -1)
297 if (net_errno != EINTR)
299 msg_Err (p_this, "poll error: %m");
304 for (unsigned i = 0; i < n; i++)
306 if (ufd[i].revents == 0)
310 int fd = net_AcceptSingle (p_this, sfd);
315 * Move listening socket to the end to let the others in the
316 * set a chance next time.
318 memmove (pi_fd + i, pi_fd + i + 1, n - (i + 1));
333 /*****************************************************************************
335 *****************************************************************************
336 * Negotiate authentication with a SOCKS server.
337 *****************************************************************************/
338 static int SocksNegotiate( vlc_object_t *p_obj,
339 int fd, int i_socks_version,
340 const char *psz_socks_user,
341 const char *psz_socks_passwd )
343 uint8_t buffer[128+2*256];
347 if( i_socks_version != 5 )
350 /* We negotiate authentication */
352 if( ( psz_socks_user == NULL ) && ( psz_socks_passwd == NULL ) )
355 buffer[0] = i_socks_version; /* SOCKS version */
358 buffer[1] = 2; /* Number of methods */
359 buffer[2] = 0x00; /* - No auth required */
360 buffer[3] = 0x02; /* - USer/Password */
365 buffer[1] = 1; /* Number of methods */
366 buffer[2] = 0x00; /* - No auth required */
370 if( net_Write( p_obj, fd, NULL, buffer, i_len ) != i_len )
372 if( net_Read( p_obj, fd, NULL, buffer, 2, true ) != 2 )
375 msg_Dbg( p_obj, "socks: v=%d method=%x", buffer[0], buffer[1] );
377 if( buffer[1] == 0x00 )
379 msg_Dbg( p_obj, "socks: no authentication required" );
381 else if( buffer[1] == 0x02 )
383 int i_len1 = __MIN( strlen(psz_socks_user), 255 );
384 int i_len2 = __MIN( strlen(psz_socks_passwd), 255 );
385 msg_Dbg( p_obj, "socks: username/password authentication" );
387 /* XXX: we don't support user/pwd > 255 (truncated)*/
388 buffer[0] = i_socks_version; /* Version */
389 buffer[1] = i_len1; /* User length */
390 memcpy( &buffer[2], psz_socks_user, i_len1 );
391 buffer[2+i_len1] = i_len2; /* Password length */
392 memcpy( &buffer[2+i_len1+1], psz_socks_passwd, i_len2 );
394 i_len = 3 + i_len1 + i_len2;
396 if( net_Write( p_obj, fd, NULL, buffer, i_len ) != i_len )
399 if( net_Read( p_obj, fd, NULL, buffer, 2, true ) != 2 )
402 msg_Dbg( p_obj, "socks: v=%d status=%x", buffer[0], buffer[1] );
403 if( buffer[1] != 0x00 )
405 msg_Err( p_obj, "socks: authentication rejected" );
412 msg_Err( p_obj, "socks: unsupported authentication method %x",
415 msg_Err( p_obj, "socks: authentication needed" );
422 /*****************************************************************************
424 *****************************************************************************
425 * Open a TCP connection using a SOCKS server and return a handle (RFC 1928)
426 *****************************************************************************/
427 static int SocksHandshakeTCP( vlc_object_t *p_obj,
430 const char *psz_user, const char *psz_passwd,
431 const char *psz_host, int i_port )
433 uint8_t buffer[128+2*256];
435 if( i_socks_version != 4 && i_socks_version != 5 )
437 msg_Warn( p_obj, "invalid socks protocol version %d", i_socks_version );
441 if( i_socks_version == 5 &&
442 SocksNegotiate( p_obj, fd, i_socks_version,
443 psz_user, psz_passwd ) )
446 if( i_socks_version == 4 )
448 /* v4 only support ipv4 */
449 static const struct addrinfo hints = {
450 .ai_family = AF_INET,
451 .ai_socktype = SOCK_STREAM,
452 .ai_protocol = IPPROTO_TCP,
455 struct addrinfo *res;
457 if (vlc_getaddrinfo (psz_host, 0, &hints, &res))
460 buffer[0] = i_socks_version;
461 buffer[1] = 0x01; /* CONNECT */
462 SetWBE( &buffer[2], i_port ); /* Port */
463 memcpy (&buffer[4], /* Address */
464 &((struct sockaddr_in *)(res->ai_addr))->sin_addr, 4);
467 buffer[8] = 0; /* Empty user id */
469 if( net_Write( p_obj, fd, NULL, buffer, 9 ) != 9 )
471 if( net_Read( p_obj, fd, NULL, buffer, 8, true ) != 8 )
474 msg_Dbg( p_obj, "socks: v=%d cd=%d",
475 buffer[0], buffer[1] );
477 if( buffer[1] != 90 )
480 else if( i_socks_version == 5 )
482 int i_hlen = __MIN(strlen( psz_host ), 255);
485 buffer[0] = i_socks_version; /* Version */
486 buffer[1] = 0x01; /* Cmd: connect */
487 buffer[2] = 0x00; /* Reserved */
488 buffer[3] = 3; /* ATYP: for now domainname */
491 memcpy( &buffer[5], psz_host, i_hlen );
492 SetWBE( &buffer[5+i_hlen], i_port );
494 i_len = 5 + i_hlen + 2;
497 if( net_Write( p_obj, fd, NULL, buffer, i_len ) != i_len )
500 /* Read the header */
501 if( net_Read( p_obj, fd, NULL, buffer, 5, true ) != 5 )
504 msg_Dbg( p_obj, "socks: v=%d rep=%d atyp=%d",
505 buffer[0], buffer[1], buffer[3] );
507 if( buffer[1] != 0x00 )
509 msg_Err( p_obj, "socks: CONNECT request failed" );
513 /* Read the remaining bytes */
514 if( buffer[3] == 0x01 )
516 else if( buffer[3] == 0x03 )
517 i_len = buffer[4] + 2;
518 else if( buffer[3] == 0x04 )
523 if( net_Read( p_obj, fd, NULL, buffer, i_len, true ) != i_len )
530 void net_ListenClose( int *pi_fd )
536 for( pi = pi_fd; *pi != -1; pi++ )