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 *****************************************************************************/
41 #ifdef HAVE_SYS_TIME_H
42 # include <sys/time.h>
54 # define INADDR_ANY 0x00000000
57 # define INADDR_NONE 0xFFFFFFFF
60 #if defined(WIN32) || defined(UNDER_CE)
62 # define EAFNOSUPPORT WSAEAFNOSUPPORT
65 int net_Socket (vlc_object_t *p_this, int family, int socktype,
68 int fd = socket (family, socktype, protocol);
71 if (net_errno != EAFNOSUPPORT)
72 msg_Err (p_this, "cannot create socket: %s",
73 net_strerror (net_errno));
77 #if defined (WIN32) || defined (UNDER_CE)
78 ioctlsocket (fd, FIONBIO, &(unsigned long){ 1 });
80 fcntl (fd, F_SETFD, FD_CLOEXEC);
81 fcntl (fd, F_SETFL, fcntl (fd, F_GETFL, 0) | O_NONBLOCK);
84 setsockopt (fd, SOL_SOCKET, SO_REUSEADDR, &(int){ 1 }, sizeof (int));
88 * Accepts only IPv6 connections on IPv6 sockets
89 * (and open an IPv4 socket later as well if needed).
90 * Only Linux and FreeBSD can map IPv4 connections on IPv6 sockets,
91 * so this allows for more uniform handling across platforms. Besides,
92 * it makes sure that IPv4 addresses will be printed as w.x.y.z rather
95 if (family == AF_INET6)
96 setsockopt (fd, IPPROTO_IPV6, IPV6_V6ONLY, &(int){ 1 }, sizeof (int));
99 #if defined (WIN32) || defined (UNDER_CE)
100 # ifndef IPV6_PROTECTION_LEVEL
101 # define IPV6_PROTECTION_LEVEL 23
102 # define PROTECTION_LEVEL_UNRESTRICTED 30
104 if (family == AF_INET6)
105 setsockopt (fd, IPPROTO_IPV6, IPV6_PROTECTION_LEVEL,
106 &(int){ PROTECTION_LEVEL_UNRESTRICTED }, sizeof (int));
113 /*****************************************************************************
115 *****************************************************************************
116 * Close a network handle
117 *****************************************************************************/
118 void net_Close (int fd)
121 CloseHandle ((HANDLE)fd);
122 #elif defined (WIN32)
131 net_ReadInner( vlc_object_t *restrict p_this, unsigned fdc, const int *fdv,
132 const v_socket_t *const *restrict vsv,
133 uint8_t *restrict p_buf, size_t i_buflen,
134 int wait_ms, vlc_bool_t waitall )
143 struct pollfd ufd[fdc];
150 if ((wait_ms != -1) && (wait_ms < 500))
160 memset (ufd, 0, sizeof (ufd));
162 for( i = 0; i < fdc; i++ )
165 ufd[i].events = POLLIN;
168 n = poll( ufd, fdc, delay_ms );
172 for( i = 0; i < fdc; i++ )
174 #if !defined(WIN32) && !defined(UNDER_CE)
175 if( fdv[i] >= FD_SETSIZE )
177 /* We don't want to overflow select() fd_set */
178 msg_Err( p_this, "select set overflow" );
182 FD_SET( fdv[i], &set );
187 n = select( maxfd + 1, &set, NULL, NULL,
188 (wait_ms == -1) ? NULL
189 : &(struct timeval){ 0, delay_ms * 1000 } );
194 assert ((unsigned)n <= fdc);
196 if (n == 0) // timeout
202 if ((i_total > 0) && (ufd[i].revents & POLLERR))
203 return i_total; // error will be dequeued on next run
205 if ((ufd[i].revents & POLLIN) == 0)
207 if (!FD_ISSET (fdv[i], &set))
218 n = (*vsv)->pf_recv( (*vsv)->p_sys, p_buf, i_buflen );
222 #if defined(WIN32) || defined(UNDER_CE)
223 n = recv( *fdv, p_buf, i_buflen, 0 );
225 n = read( *fdv, p_buf, i_buflen );
231 #if defined(WIN32) || defined(UNDER_CE)
232 switch( WSAGetLastError() )
235 /* only happens with vs != NULL (SSL) - not really an error */
240 /* On Win32, recv() fails if the datagram doesn't fit inside
241 * the passed buffer, even though the buffer will be filled
242 * with the first part of the datagram. */
243 msg_Err( p_this, "Receive error: "
244 "Increase the mtu size (--mtu option)" );
249 if( errno == EAGAIN ) /* spurious wake-up (sucks if fdc > 1) */
269 return i_total; // time's up!
274 msg_Err( p_this, "Read error: %s", net_strerror (net_errno) );
275 return i_total ? (ssize_t)i_total : -1;
279 /*****************************************************************************
281 *****************************************************************************
282 * Read from a network socket
283 * If b_retry is true, then we repeat until we have read the right amount of
285 *****************************************************************************/
286 int __net_Read( vlc_object_t *restrict p_this, int fd,
287 const v_socket_t *restrict p_vs,
288 uint8_t *restrict p_data, int i_data, vlc_bool_t b_retry )
290 return net_ReadInner( p_this, 1, &(int){ fd },
291 &(const v_socket_t *){ p_vs },
292 p_data, i_data, -1, b_retry );
296 /*****************************************************************************
297 * __net_ReadNonBlock:
298 *****************************************************************************
299 * Read from a network socket, non blocking mode (with timeout)
300 *****************************************************************************/
301 int __net_ReadNonBlock( vlc_object_t *restrict p_this, int fd,
302 const v_socket_t *restrict p_vs,
303 uint8_t *restrict p_data, int i_data, mtime_t i_wait)
305 return net_ReadInner (p_this, 1, &(int){ fd },
306 &(const v_socket_t *){ p_vs },
307 p_data, i_data, i_wait / 1000, VLC_FALSE);
311 /*****************************************************************************
313 *****************************************************************************
314 * Read from several sockets (with timeout). Takes data from the first socket
316 *****************************************************************************/
317 int __net_Select( vlc_object_t *restrict p_this, const int *restrict pi_fd,
318 const v_socket_t *const *restrict pp_vs,
319 int i_fd, uint8_t *restrict p_data, int i_data,
324 const v_socket_t *vsv[i_fd];
325 memset( vsv, 0, sizeof (vsv) );
327 return net_ReadInner( p_this, i_fd, pi_fd, vsv, p_data, i_data,
328 i_wait / 1000, VLC_FALSE );
331 return net_ReadInner( p_this, i_fd, pi_fd, pp_vs, p_data, i_data,
332 i_wait / 1000, VLC_FALSE );
336 /* Write exact amount requested */
337 int __net_Write( vlc_object_t *p_this, int fd, const v_socket_t *p_vs,
338 const uint8_t *p_data, int i_data )
348 struct pollfd ufd[1];
349 memset (ufd, 0, sizeof (ufd));
351 ufd[0].events = POLLOUT;
353 int val = poll (ufd, 1, 500);
354 if ((val > 0) && (ufd[0].revents & POLLERR) && (i_total > 0))
355 return i_total; // error will be dequeued separately on next call
360 #if !defined(WIN32) && !defined(UNDER_CE)
361 if (fd >= FD_SETSIZE)
363 /* We don't want to overflow select() fd_set */
364 msg_Err (p_this, "select set overflow");
370 int val = select (fd + 1, NULL, &set, NULL,
371 &(struct timeval){ 0, 500000 });
378 msg_Err (p_this, "Write error: %s",
379 net_strerror (net_errno));
380 return i_total ? (int)i_total : -1;
388 val = p_vs->pf_send (p_vs->p_sys, p_data, i_data);
390 #if defined(WIN32) || defined(UNDER_CE)
391 val = send (fd, p_data, i_data, 0);
393 val = write (fd, p_data, i_data);
397 return i_total ? (int)i_total : -1;
409 char *__net_Gets( vlc_object_t *p_this, int fd, const v_socket_t *p_vs )
411 char *psz_line = NULL, *ptr = NULL;
412 size_t i_line = 0, i_max = 0;
417 if( i_line == i_max )
420 psz_line = realloc( psz_line, i_max );
421 ptr = psz_line + i_line;
424 if( net_Read( p_this, fd, p_vs, (uint8_t *)ptr, 1, VLC_TRUE ) != 1 )
443 if( ( ptr >= psz_line ) && ( *ptr == '\r' ) )
449 int net_Printf( vlc_object_t *p_this, int fd, const v_socket_t *p_vs,
450 const char *psz_fmt, ... )
454 va_start( args, psz_fmt );
455 i_ret = net_vaPrintf( p_this, fd, p_vs, psz_fmt, args );
461 int __net_vaPrintf( vlc_object_t *p_this, int fd, const v_socket_t *p_vs,
462 const char *psz_fmt, va_list args )
467 i_size = vasprintf( &psz, psz_fmt, args );
468 i_ret = __net_Write( p_this, fd, p_vs, (uint8_t *)psz, i_size ) < i_size
476 /*****************************************************************************
477 * inet_pton replacement for obsolete and/or crap operating systems
478 *****************************************************************************/
479 #ifndef HAVE_INET_PTON
480 int inet_pton(int af, const char *src, void *dst)
483 /* As we already know, Microsoft always go its own way, so even if they do
484 * provide IPv6, they don't provide the API. */
485 struct sockaddr_storage addr;
486 int len = sizeof( addr );
488 /* Damn it, they didn't even put LPCSTR for the firs parameter!!! */
490 wchar_t *workaround_for_ill_designed_api =
491 malloc( MAX_PATH * sizeof(wchar_t) );
492 mbstowcs( workaround_for_ill_designed_api, src, MAX_PATH );
493 workaround_for_ill_designed_api[MAX_PATH-1] = 0;
495 char *workaround_for_ill_designed_api = strdup( src );
498 if( !WSAStringToAddress( workaround_for_ill_designed_api, af, NULL,
499 (LPSOCKADDR)&addr, &len ) )
501 free( workaround_for_ill_designed_api );
504 free( workaround_for_ill_designed_api );
509 memcpy( dst, &((struct sockaddr_in6 *)&addr)->sin6_addr, 16 );
513 memcpy( dst, &((struct sockaddr_in *)&addr)->sin_addr, 4 );
517 WSASetLastError( WSAEAFNOSUPPORT );
521 /* Assume IPv6 is not supported. */
522 /* Would be safer and more simpler to use inet_aton() but it is most
523 * likely not provided either. */
528 errno = EAFNOSUPPORT;
532 ipv4 = inet_addr( src );
533 if( ipv4 == INADDR_NONE )
536 memcpy( dst, &ipv4, 4 );
540 #endif /* HAVE_INET_PTON */