1 /*****************************************************************************
2 * io.c: network I/O functions
3 *****************************************************************************
4 * Copyright (C) 2004-2005 the VideoLAN team
5 * Copyright © 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 *****************************************************************************/
38 #ifdef HAVE_SYS_TIME_H
39 # include <sys/time.h>
45 # include <sys/poll.h>
51 # define INADDR_ANY 0x00000000
54 # define INADDR_NONE 0xFFFFFFFF
57 int net_Socket( vlc_object_t *p_this, int i_family, int i_socktype,
62 fd = socket( i_family, i_socktype, i_protocol );
65 #if defined(WIN32) || defined(UNDER_CE)
66 if( WSAGetLastError ( ) != WSAEAFNOSUPPORT )
68 if( errno != EAFNOSUPPORT )
70 msg_Warn( p_this, "cannot create socket: %s",
71 net_strerror(net_errno) );
75 #if defined( WIN32 ) || defined( UNDER_CE )
77 unsigned long i_dummy = 1;
78 if( ioctlsocket( fd, FIONBIO, &i_dummy ) != 0 )
79 msg_Err( p_this, "cannot set socket to non-blocking mode" );
82 if( fd >= FD_SETSIZE )
84 /* We don't want to overflow select() fd_set */
85 msg_Err( p_this, "cannot create socket (too many already in use)" );
90 fcntl( fd, F_SETFD, FD_CLOEXEC );
91 i_val = fcntl( fd, F_GETFL, 0 );
92 fcntl( fd, F_SETFL, ((i_val != -1) ? i_val : 0) | O_NONBLOCK );
96 setsockopt( fd, SOL_SOCKET, SO_REUSEADDR, (void *)&i_val,
101 * Accepts only IPv6 connections on IPv6 sockets
102 * (and open an IPv4 socket later as well if needed).
103 * Only Linux and FreeBSD can map IPv4 connections on IPv6 sockets,
104 * so this allows for more uniform handling across platforms. Besides,
105 * it makes sure that IPv4 addresses will be printed as w.x.y.z rather
106 * than ::ffff:w.x.y.z
108 if( i_family == AF_INET6 )
109 setsockopt( fd, IPPROTO_IPV6, IPV6_V6ONLY, (void *)&i_val,
113 #if defined( WIN32 ) || defined( UNDER_CE )
114 # ifndef IPV6_PROTECTION_LEVEL
115 # define IPV6_PROTECTION_LEVEL 23
117 if( i_family == AF_INET6 )
119 i_val = 30 /*PROTECTION_LEVEL_UNRESTRICTED*/;
120 setsockopt( fd, IPPROTO_IPV6, IPV6_PROTECTION_LEVEL,
121 (const char*)&i_val, sizeof( i_val ) );
128 /*****************************************************************************
130 *****************************************************************************
131 * Close a network handle
132 *****************************************************************************/
133 void net_Close( int fd )
136 CloseHandle( (HANDLE)fd );
137 #elif defined( WIN32 )
146 net_ReadInner( vlc_object_t *restrict p_this, unsigned fdc, const int *fdv,
147 v_socket_t *const *restrict vsv,
148 uint8_t *restrict buf, size_t buflen,
149 int wait_ms, vlc_bool_t waitall )
155 if (waitall && (buflen == 0))
156 return total; // output buffer full
161 delay_ms = (wait_ms > 500) ? 500 : wait_ms;
168 struct pollfd ufd[fdc];
169 memset (ufd, 0, sizeof (ufd));
171 for (unsigned i = 0; i < fdc; i++)
174 ufd[i].events = POLLIN;
180 n = poll (ufd, fdc, (wait_ms == -1) ? -1 : delay_ms);
184 assert ((unsigned)n <= fdc);
186 for (int i = 0; n > 0; i++)
200 for (unsigned i = 0; i < fdc; i++)
202 #if !defined(WIN32) && !defined(UNDER_CE)
203 if (fdv[i] >= FD_SETSIZE)
205 /* We don't want to overflow select() fd_set */
206 msg_Err( p_this, "select set overflow" );
210 FD_SET (fdv[i], &set);
215 n = select (maxfd + 1, &set, NULL, NULL,
216 (wait_ms == -1) ? NULL
217 : &(struct timeval){ 0, delay_ms * 1000 });
221 for (unsigned i = 0; n > 0; i++)
222 if (FD_ISSET (fdv[i], &set))
236 n = (*vsv)->pf_recv ((*vsv)->p_sys, buf, buflen);
238 n = recv (*fdv, buf, buflen, 0);
242 #if defined(WIN32) || defined(UNDER_CE)
243 switch (WSAGetLastError())
246 /* only happens with vs != NULL (SSL) - not really an error */
251 /* On Win32, recv() fails if the datagram doesn't fit inside
252 * the passed buffer, even though the buffer will be filled
253 * with the first part of the datagram. */
254 msg_Err( p_this, "recv() failed. "
255 "Increase the mtu size (--mtu option)" );
260 if( errno == EAGAIN ) /* spurious wake-up (sucks if fdc > 1) */
272 return total; // timeout
275 msg_Err (p_this, "Receive error: %s", net_strerror (net_errno));
276 return (total > 0) ? total : -1;
280 /*****************************************************************************
282 *****************************************************************************
283 * Read from a network socket
284 * If b_retry is true, then we repeat until we have read the right amount of
286 *****************************************************************************/
287 int __net_Read( vlc_object_t *restrict p_this, int fd,
288 v_socket_t *restrict p_vs,
289 uint8_t *restrict p_data, int i_data, vlc_bool_t b_retry )
291 struct timeval timeout;
296 vlc_bool_t b_die = p_this->b_die;
302 if( p_this->b_die != b_die )
307 /* Initialize file descriptor set */
309 FD_SET( fd, &fds_r );
311 FD_SET( fd, &fds_e );
313 /* We'll wait 0.5 second if nothing happens */
315 timeout.tv_usec = 500000;
317 } while( (i_ret = select(fd + 1, &fds_r, NULL, &fds_e, &timeout)) == 0
318 || ( i_ret < 0 && errno == EINTR ) );
322 msg_Err( p_this, "network select error (%s)",
323 net_strerror(net_errno) );
324 return i_total > 0 ? i_total : -1;
327 if( ( i_recv = (p_vs != NULL)
328 ? p_vs->pf_recv( p_vs->p_sys, p_data, i_data )
329 : recv( fd, p_data, i_data, 0 ) ) < 0 )
331 #if defined(WIN32) || defined(UNDER_CE)
332 if( WSAGetLastError() == WSAEWOULDBLOCK )
334 /* only happens with p_vs (SSL) - not really an error */
338 /* On win32 recv() will fail if the datagram doesn't fit inside
339 * the passed buffer, even though the buffer will be filled with
340 * the first part of the datagram. */
341 if( WSAGetLastError() == WSAEMSGSIZE )
343 msg_Err( p_this, "recv() failed. "
344 "Increase the mtu size (--mtu option)" );
347 else if( WSAGetLastError() == WSAEINTR ) continue;
349 /* EAGAIN only happens with p_vs (TLS) and it's not an error */
350 if( errno != EAGAIN )
352 msg_Err( p_this, "recv failed: %s", net_strerror(net_errno) );
353 return i_total > 0 ? i_total : -1;
355 else if( i_recv == 0 )
357 /* Connection closed */
372 /*****************************************************************************
373 * __net_ReadNonBlock:
374 *****************************************************************************
375 * Read from a network socket, non blocking mode (with timeout)
376 *****************************************************************************/
377 int __net_ReadNonBlock( vlc_object_t *p_this, int fd, v_socket_t *p_vs,
378 uint8_t *p_data, int i_data, mtime_t i_wait)
380 struct timeval timeout;
385 /* Initialize file descriptor set */
387 FD_SET( fd, &fds_r );
389 FD_SET( fd, &fds_e );
392 timeout.tv_usec = i_wait;
394 i_ret = select(fd + 1, &fds_r, NULL, &fds_e, &timeout);
396 if( i_ret < 0 && errno == EINTR )
402 msg_Err( p_this, "network error: %s", net_strerror(net_errno) );
411 #if !defined(UNDER_CE)
412 if( fd == 0/*STDIN_FILENO*/ ) i_recv = read( fd, p_data, i_data ); else
414 if( ( i_recv = (p_vs != NULL)
415 ? p_vs->pf_recv( p_vs->p_sys, p_data, i_data )
416 : recv( fd, p_data, i_data, 0 ) ) < 0 )
418 #if defined(WIN32) || defined(UNDER_CE)
420 /* On win32 recv() will fail if the datagram doesn't fit inside
421 * the passed buffer, even though the buffer will be filled with
422 * the first part of the datagram. */
423 if( WSAGetLastError() == WSAEMSGSIZE )
425 msg_Err( p_this, "recv() failed. "
426 "Increase the mtu size (--mtu option)" );
430 msg_Err( p_this, "recv failed: %s", net_strerror(net_errno) );
434 return i_recv ? i_recv : -1; /* !i_recv -> connection closed if tcp */
437 /* We will never be here */
441 /*****************************************************************************
443 *****************************************************************************
444 * Read from several sockets (with timeout). Takes data from the first socket
446 *****************************************************************************/
447 int __net_Select( vlc_object_t *p_this, int *pi_fd, v_socket_t **pp_vs,
448 int i_fd, uint8_t *p_data, int i_data, mtime_t i_wait )
450 struct timeval timeout;
457 /* Initialize file descriptor set */
461 for( i = 0 ; i < i_fd ; i++)
463 if( pi_fd[i] > i_max_fd ) i_max_fd = pi_fd[i];
464 FD_SET( pi_fd[i], &fds_r );
465 FD_SET( pi_fd[i], &fds_e );
469 timeout.tv_usec = i_wait;
471 i_ret = select( i_max_fd + 1, &fds_r, NULL, &fds_e, &timeout );
473 if( i_ret < 0 && errno == EINTR )
479 msg_Err( p_this, "network selection error: %s", net_strerror(net_errno) );
482 else if( i_ret == 0 )
488 for( i = 0 ; i < i_fd ; i++)
490 if( FD_ISSET( pi_fd[i], &fds_r ) )
492 i_recv = ((pp_vs != NULL) && (pp_vs[i] != NULL))
493 ? pp_vs[i]->pf_recv( pp_vs[i]->p_sys, p_data, i_data )
494 : recv( pi_fd[i], p_data, i_data, 0 );
499 /* On win32 recv() will fail if the datagram doesn't
500 * fit inside the passed buffer, even though the buffer
501 * will be filled with the first part of the datagram. */
502 if( WSAGetLastError() == WSAEMSGSIZE )
504 msg_Err( p_this, "recv() failed. "
505 "Increase the mtu size (--mtu option)" );
507 else msg_Err( p_this, "recv failed (%i)",
510 msg_Err( p_this, "recv failed (%s)", strerror(errno) );
520 /* We will never be here */
525 /* Write exact amount requested */
526 int __net_Write( vlc_object_t *p_this, int fd, v_socket_t *p_vs,
527 const uint8_t *p_data, int i_data )
529 struct timeval timeout;
535 vlc_bool_t b_die = p_this->b_die;
541 if( p_this->b_die != b_die )
546 /* Initialize file descriptor set */
548 FD_SET( fd, &fds_w );
550 FD_SET( fd, &fds_e );
552 /* We'll wait 0.5 second if nothing happens */
554 timeout.tv_usec = 500000;
556 } while( (i_ret = select(fd + 1, NULL, &fds_w, &fds_e, &timeout)) == 0
557 || ( i_ret < 0 && errno == EINTR ) );
561 #if defined(WIN32) || defined(UNDER_CE)
562 msg_Err( p_this, "network selection error (%d)", WSAGetLastError() );
564 msg_Err( p_this, "network selection error (%s)", strerror(errno) );
566 return i_total > 0 ? i_total : -1;
569 if( ( i_send = (p_vs != NULL)
570 ? p_vs->pf_send( p_vs->p_sys, p_data, i_data )
571 : send( fd, p_data, i_data, 0 ) ) < 0 )
573 /* XXX With udp for example, it will issue a message if the host
575 /* msg_Err( p_this, "send failed (%s)", strerror(errno) ); */
576 return i_total > 0 ? i_total : -1;
586 char *__net_Gets( vlc_object_t *p_this, int fd, v_socket_t *p_vs )
588 char *psz_line = NULL, *ptr = NULL;
589 size_t i_line = 0, i_max = 0;
594 if( i_line == i_max )
597 psz_line = realloc( psz_line, i_max );
598 ptr = psz_line + i_line;
601 if( net_Read( p_this, fd, p_vs, (uint8_t *)ptr, 1, VLC_TRUE ) != 1 )
620 if( ( ptr >= psz_line ) && ( *ptr == '\r' ) )
626 int net_Printf( vlc_object_t *p_this, int fd, v_socket_t *p_vs,
627 const char *psz_fmt, ... )
631 va_start( args, psz_fmt );
632 i_ret = net_vaPrintf( p_this, fd, p_vs, psz_fmt, args );
638 int __net_vaPrintf( vlc_object_t *p_this, int fd, v_socket_t *p_vs,
639 const char *psz_fmt, va_list args )
644 i_size = vasprintf( &psz, psz_fmt, args );
645 i_ret = __net_Write( p_this, fd, p_vs, (uint8_t *)psz, i_size ) < i_size
653 /*****************************************************************************
654 * inet_pton replacement for obsolete and/or crap operating systems
655 *****************************************************************************/
656 #ifndef HAVE_INET_PTON
657 int inet_pton(int af, const char *src, void *dst)
660 /* As we already know, Microsoft always go its own way, so even if they do
661 * provide IPv6, they don't provide the API. */
662 struct sockaddr_storage addr;
663 int len = sizeof( addr );
665 /* Damn it, they didn't even put LPCSTR for the firs parameter!!! */
667 wchar_t *workaround_for_ill_designed_api =
668 malloc( MAX_PATH * sizeof(wchar_t) );
669 mbstowcs( workaround_for_ill_designed_api, src, MAX_PATH );
670 workaround_for_ill_designed_api[MAX_PATH-1] = 0;
672 char *workaround_for_ill_designed_api = strdup( src );
675 if( !WSAStringToAddress( workaround_for_ill_designed_api, af, NULL,
676 (LPSOCKADDR)&addr, &len ) )
678 free( workaround_for_ill_designed_api );
681 free( workaround_for_ill_designed_api );
686 memcpy( dst, &((struct sockaddr_in6 *)&addr)->sin6_addr, 16 );
690 memcpy( dst, &((struct sockaddr_in *)&addr)->sin_addr, 4 );
694 WSASetLastError( WSAEAFNOSUPPORT );
698 /* Assume IPv6 is not supported. */
699 /* Would be safer and more simpler to use inet_aton() but it is most
700 * likely not provided either. */
705 errno = EAFNOSUPPORT;
709 ipv4 = inet_addr( src );
710 if( ipv4 == INADDR_NONE )
713 memcpy( dst, &ipv4, 4 );
717 #endif /* HAVE_INET_PTON */