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 )
138 unsigned int i_eof = 0;
139 memset( eof, 0, sizeof( eof ) );
146 struct pollfd ufd[fdc];
153 return i_total; // output buffer full
156 return i_total; // all sockets are at EOF
159 if( (wait_ms != -1) && (wait_ms < 500) )
169 memset(ufd, 0, sizeof (ufd) );
171 for( i = 0; i < fdc; i++ )
174 ufd[i].events = POLLIN;
177 n = poll( ufd, fdc, delay_ms );
181 assert( (unsigned int)n <= fdc );
183 for( i = 0; n > 0; i++ )
185 if( (i_total > 0) && (ufd[i].revents & POLLERR) )
186 return i_total; // error will be dequeued on next run
200 for( 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( i = 0; n > 0; i++ )
222 if( FD_ISSET (fdv[i], &set) )
237 n = (*vsv)->pf_recv( (*vsv)->p_sys, p_buf, i_buflen );
241 #if defined(WIN32) || defined(UNDER_CE)
242 n = recv( *fdv, p_buf, i_buflen, 0 );
244 n = read( *fdv, p_buf, i_buflen );
250 #if defined(WIN32) || defined(UNDER_CE)
251 switch( WSAGetLastError() )
254 /* only happens with vs != NULL (SSL) - not really an error */
259 /* On Win32, recv() fails if the datagram doesn't fit inside
260 * the passed buffer, even though the buffer will be filled
261 * with the first part of the datagram. */
262 msg_Err( p_this, "Receive error: "
263 "Increase the mtu size (--mtu option)" );
268 if( errno == EAGAIN ) /* spurious wake-up (sucks if fdc > 1) */
278 if( n == 0 ) // EOF on socket
281 for( j = 0 ; j < i_eof ; j++ )
282 if( eof[j] == *fdv ) goto end;
298 return i_total; // timeout
301 msg_Err( p_this, "Read error: %s", net_strerror (net_errno) );
302 return i_total ? (int)i_total : -1;
306 /*****************************************************************************
308 *****************************************************************************
309 * Read from a network socket
310 * If b_retry is true, then we repeat until we have read the right amount of
312 *****************************************************************************/
313 int __net_Read( vlc_object_t *restrict p_this, int fd,
314 const v_socket_t *restrict p_vs,
315 uint8_t *restrict p_data, int i_data, vlc_bool_t b_retry )
317 return net_ReadInner( p_this, 1, &(int){ fd },
318 &(const v_socket_t *){ p_vs },
319 p_data, i_data, -1, b_retry );
323 /*****************************************************************************
324 * __net_ReadNonBlock:
325 *****************************************************************************
326 * Read from a network socket, non blocking mode (with timeout)
327 *****************************************************************************/
328 int __net_ReadNonBlock( vlc_object_t *restrict p_this, int fd,
329 const v_socket_t *restrict p_vs,
330 uint8_t *restrict p_data, int i_data, mtime_t i_wait)
332 return net_ReadInner (p_this, 1, &(int){ fd },
333 &(const v_socket_t *){ p_vs },
334 p_data, i_data, i_wait / 1000, VLC_FALSE);
338 /*****************************************************************************
340 *****************************************************************************
341 * Read from several sockets (with timeout). Takes data from the first socket
343 *****************************************************************************/
344 int __net_Select( vlc_object_t *restrict p_this, const int *restrict pi_fd,
345 const v_socket_t *const *restrict pp_vs,
346 int i_fd, uint8_t *restrict p_data, int i_data,
351 const v_socket_t *vsv[i_fd];
352 memset( vsv, 0, sizeof (vsv) );
354 return net_ReadInner( p_this, i_fd, pi_fd, vsv, p_data, i_data,
355 i_wait / 1000, VLC_FALSE );
358 return net_ReadInner( p_this, i_fd, pi_fd, pp_vs, p_data, i_data,
359 i_wait / 1000, VLC_FALSE );
363 /* Write exact amount requested */
364 int __net_Write( vlc_object_t *p_this, int fd, const v_socket_t *p_vs,
365 const uint8_t *p_data, int i_data )
375 struct pollfd ufd[1];
376 memset (ufd, 0, sizeof (ufd));
378 ufd[0].events = POLLOUT;
380 int val = poll (ufd, 1, 500);
381 if ((val > 0) && (ufd[0].revents & POLLERR) && (i_total > 0))
382 return i_total; // error will be dequeued separately on next call
387 #if !defined(WIN32) && !defined(UNDER_CE)
388 if (fd >= FD_SETSIZE)
390 /* We don't want to overflow select() fd_set */
391 msg_Err (p_this, "select set overflow");
397 int val = select (fd + 1, NULL, &set, NULL,
398 &(struct timeval){ 0, 500000 });
405 msg_Err (p_this, "Write error: %s",
406 net_strerror (net_errno));
407 return i_total ? (int)i_total : -1;
415 val = p_vs->pf_send (p_vs->p_sys, p_data, i_data);
417 #if defined(WIN32) || defined(UNDER_CE)
418 val = send (fd, p_data, i_data, 0);
420 val = write (fd, p_data, i_data);
424 return i_total ? (int)i_total : -1;
436 char *__net_Gets( vlc_object_t *p_this, int fd, const v_socket_t *p_vs )
438 char *psz_line = NULL, *ptr = NULL;
439 size_t i_line = 0, i_max = 0;
444 if( i_line == i_max )
447 psz_line = realloc( psz_line, i_max );
448 ptr = psz_line + i_line;
451 if( net_Read( p_this, fd, p_vs, (uint8_t *)ptr, 1, VLC_TRUE ) != 1 )
470 if( ( ptr >= psz_line ) && ( *ptr == '\r' ) )
476 int net_Printf( vlc_object_t *p_this, int fd, const v_socket_t *p_vs,
477 const char *psz_fmt, ... )
481 va_start( args, psz_fmt );
482 i_ret = net_vaPrintf( p_this, fd, p_vs, psz_fmt, args );
488 int __net_vaPrintf( vlc_object_t *p_this, int fd, const v_socket_t *p_vs,
489 const char *psz_fmt, va_list args )
494 i_size = vasprintf( &psz, psz_fmt, args );
495 i_ret = __net_Write( p_this, fd, p_vs, (uint8_t *)psz, i_size ) < i_size
503 /*****************************************************************************
504 * inet_pton replacement for obsolete and/or crap operating systems
505 *****************************************************************************/
506 #ifndef HAVE_INET_PTON
507 int inet_pton(int af, const char *src, void *dst)
510 /* As we already know, Microsoft always go its own way, so even if they do
511 * provide IPv6, they don't provide the API. */
512 struct sockaddr_storage addr;
513 int len = sizeof( addr );
515 /* Damn it, they didn't even put LPCSTR for the firs parameter!!! */
517 wchar_t *workaround_for_ill_designed_api =
518 malloc( MAX_PATH * sizeof(wchar_t) );
519 mbstowcs( workaround_for_ill_designed_api, src, MAX_PATH );
520 workaround_for_ill_designed_api[MAX_PATH-1] = 0;
522 char *workaround_for_ill_designed_api = strdup( src );
525 if( !WSAStringToAddress( workaround_for_ill_designed_api, af, NULL,
526 (LPSOCKADDR)&addr, &len ) )
528 free( workaround_for_ill_designed_api );
531 free( workaround_for_ill_designed_api );
536 memcpy( dst, &((struct sockaddr_in6 *)&addr)->sin6_addr, 16 );
540 memcpy( dst, &((struct sockaddr_in *)&addr)->sin_addr, 4 );
544 WSASetLastError( WSAEAFNOSUPPORT );
548 /* Assume IPv6 is not supported. */
549 /* Would be safer and more simpler to use inet_aton() but it is most
550 * likely not provided either. */
555 errno = EAFNOSUPPORT;
559 ipv4 = inet_addr( src );
560 if( ipv4 == INADDR_NONE )
563 memcpy( dst, &ipv4, 4 );
567 #endif /* HAVE_INET_PTON */