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>
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 fcntl( fd, F_SETFD, FD_CLOEXEC );
83 i_val = fcntl( fd, F_GETFL, 0 );
84 fcntl( fd, F_SETFL, ((i_val != -1) ? i_val : 0) | O_NONBLOCK );
88 setsockopt( fd, SOL_SOCKET, SO_REUSEADDR, (void *)&i_val,
93 * Accepts only IPv6 connections on IPv6 sockets
94 * (and open an IPv4 socket later as well if needed).
95 * Only Linux and FreeBSD can map IPv4 connections on IPv6 sockets,
96 * so this allows for more uniform handling across platforms. Besides,
97 * it makes sure that IPv4 addresses will be printed as w.x.y.z rather
100 if( i_family == AF_INET6 )
101 setsockopt( fd, IPPROTO_IPV6, IPV6_V6ONLY, (void *)&i_val,
105 #if defined( WIN32 ) || defined( UNDER_CE )
106 # ifndef IPV6_PROTECTION_LEVEL
107 # define IPV6_PROTECTION_LEVEL 23
109 if( i_family == AF_INET6 )
111 i_val = 30 /*PROTECTION_LEVEL_UNRESTRICTED*/;
112 setsockopt( fd, IPPROTO_IPV6, IPV6_PROTECTION_LEVEL,
113 (const char*)&i_val, sizeof( i_val ) );
120 /*****************************************************************************
122 *****************************************************************************
123 * Close a network handle
124 *****************************************************************************/
125 void net_Close( int fd )
128 CloseHandle( (HANDLE)fd );
129 #elif defined( WIN32 )
138 net_ReadInner( vlc_object_t *restrict p_this, unsigned fdc, const int *fdv,
139 const v_socket_t *const *restrict vsv,
140 uint8_t *restrict p_buf, size_t i_buflen,
141 int wait_ms, vlc_bool_t waitall )
150 struct pollfd ufd[fdc];
157 return i_total; // output buffer full
160 if( (wait_ms != -1) && (wait_ms < 500) )
164 memset(ufd, 0, sizeof (ufd) );
166 for( i = 0; i < fdc; i++ )
169 ufd[i].events = POLLIN;
175 n = poll( ufd, fdc, (wait_ms == -1) ? -1 : delay_ms );
179 assert( (unsigned int)n <= fdc );
181 for( i = 0; n > 0; i++ )
183 if ((total > 0) && (ufd[i].revents & POLLERR))
184 return total; // error will be dequeued on next run
198 for( i = 0; i < fdc; i++ )
200 #if !defined(WIN32) && !defined(UNDER_CE)
201 if( fdv[i] >= FD_SETSIZE )
203 /* We don't want to overflow select() fd_set */
204 msg_Err( p_this, "select set overflow" );
208 FD_SET( fdv[i], &set );
213 n = select( maxfd + 1, &set, NULL, NULL,
214 (wait_ms == -1) ? NULL
215 : &(struct timeval){ 0, delay_ms * 1000 } );
219 for( i = 0; n > 0; i++ )
220 if( FD_ISSET (fdv[i], &set) )
235 n = (*vsv)->pf_recv( (*vsv)->p_sys, p_buf, i_buflen );
239 #if defined(WIN32) || defined(UNDER_CE)
240 n = recv( *fdv, p_buf, i_buflen, 0 );
242 n = read( *fdv, p_buf, i_buflen );
248 #if defined(WIN32) || defined(UNDER_CE)
249 switch( WSAGetLastError() )
252 /* only happens with vs != NULL (SSL) - not really an error */
257 /* On Win32, recv() fails if the datagram doesn't fit inside
258 * the passed buffer, even though the buffer will be filled
259 * with the first part of the datagram. */
260 msg_Err( p_this, "Receive error: "
261 "Increase the mtu size (--mtu option)" );
266 if( errno == EAGAIN ) /* spurious wake-up (sucks if fdc > 1) */
288 return i_total; // timeout
291 msg_Err( p_this, "Read error: %s", net_strerror (net_errno) );
292 return total ? (int)total : -1;
296 /*****************************************************************************
298 *****************************************************************************
299 * Read from a network socket
300 * If b_retry is true, then we repeat until we have read the right amount of
302 *****************************************************************************/
303 int __net_Read( vlc_object_t *restrict p_this, int fd,
304 const v_socket_t *restrict p_vs,
305 uint8_t *restrict p_data, int i_data, vlc_bool_t b_retry )
307 return net_ReadInner( p_this, 1, &(int){ fd },
308 &(const v_socket_t *){ p_vs },
309 p_data, i_data, -1, b_retry );
313 /*****************************************************************************
314 * __net_ReadNonBlock:
315 *****************************************************************************
316 * Read from a network socket, non blocking mode (with timeout)
317 *****************************************************************************/
318 int __net_ReadNonBlock( vlc_object_t *restrict p_this, int fd,
319 const v_socket_t *restrict p_vs,
320 uint8_t *restrict p_data, int i_data, mtime_t i_wait)
322 return net_ReadInner (p_this, 1, &(int){ fd },
323 &(const v_socket_t *){ p_vs },
324 p_data, i_data, i_wait / 1000, VLC_FALSE);
328 /*****************************************************************************
330 *****************************************************************************
331 * Read from several sockets (with timeout). Takes data from the first socket
333 *****************************************************************************/
334 int __net_Select( vlc_object_t *restrict p_this, const int *restrict pi_fd,
335 const v_socket_t *const *restrict pp_vs,
336 int i_fd, uint8_t *restrict p_data, int i_data,
341 const v_socket_t *vsv[i_fd];
342 memset( vsv, 0, sizeof (vsv) );
344 return net_ReadInner( p_this, i_fd, pi_fd, vsv, p_data, i_data,
345 i_wait / 1000, VLC_FALSE );
348 return net_ReadInner( p_this, i_fd, pi_fd, pp_vs, p_data, i_data,
349 i_wait / 1000, VLC_FALSE );
353 /* Write exact amount requested */
354 int __net_Write( vlc_object_t *p_this, int fd, const v_socket_t *p_vs,
355 const uint8_t *p_data, int i_data )
365 struct pollfd ufd[1];
366 memset (ufd, 0, sizeof (ufd));
368 ufd[0].events = POLLOUT;
370 int val = poll (ufd, 1, 500);
371 if ((val > 0) && (ufd[0].revents & POLLERR) && (total > 0))
372 return total; // error will be dequeued separately on next call
377 #if !defined(WIN32) && !defined(UNDER_CE)
378 if (fd >= FD_SETSIZE)
380 /* We don't want to overflow select() fd_set */
381 msg_Err (p_this, "select set overflow");
387 int val = select (fd + 1, NULL, &set, NULL,
388 &(struct timeval){ 0, 500000 });
395 msg_Err (p_this, "Write error: %s",
396 net_strerror (net_errno));
397 return total ? (int)total : -1;
405 val = p_vs->pf_send (p_vs->p_sys, p_data, i_data);
407 #if defined(WIN32) || defined(UNDER_CE)
408 val = recv (fd, p_data, i_data, 0);
410 val = write (fd, p_data, i_data);
414 return total ? (int)total : -1;
426 char *__net_Gets( vlc_object_t *p_this, int fd, const v_socket_t *p_vs )
428 char *psz_line = NULL, *ptr = NULL;
429 size_t i_line = 0, i_max = 0;
434 if( i_line == i_max )
437 psz_line = realloc( psz_line, i_max );
438 ptr = psz_line + i_line;
441 if( net_Read( p_this, fd, p_vs, (uint8_t *)ptr, 1, VLC_TRUE ) != 1 )
460 if( ( ptr >= psz_line ) && ( *ptr == '\r' ) )
466 int net_Printf( vlc_object_t *p_this, int fd, const v_socket_t *p_vs,
467 const char *psz_fmt, ... )
471 va_start( args, psz_fmt );
472 i_ret = net_vaPrintf( p_this, fd, p_vs, psz_fmt, args );
478 int __net_vaPrintf( vlc_object_t *p_this, int fd, const v_socket_t *p_vs,
479 const char *psz_fmt, va_list args )
484 i_size = vasprintf( &psz, psz_fmt, args );
485 i_ret = __net_Write( p_this, fd, p_vs, (uint8_t *)psz, i_size ) < i_size
493 /*****************************************************************************
494 * inet_pton replacement for obsolete and/or crap operating systems
495 *****************************************************************************/
496 #ifndef HAVE_INET_PTON
497 int inet_pton(int af, const char *src, void *dst)
500 /* As we already know, Microsoft always go its own way, so even if they do
501 * provide IPv6, they don't provide the API. */
502 struct sockaddr_storage addr;
503 int len = sizeof( addr );
505 /* Damn it, they didn't even put LPCSTR for the firs parameter!!! */
507 wchar_t *workaround_for_ill_designed_api =
508 malloc( MAX_PATH * sizeof(wchar_t) );
509 mbstowcs( workaround_for_ill_designed_api, src, MAX_PATH );
510 workaround_for_ill_designed_api[MAX_PATH-1] = 0;
512 char *workaround_for_ill_designed_api = strdup( src );
515 if( !WSAStringToAddress( workaround_for_ill_designed_api, af, NULL,
516 (LPSOCKADDR)&addr, &len ) )
518 free( workaround_for_ill_designed_api );
521 free( workaround_for_ill_designed_api );
526 memcpy( dst, &((struct sockaddr_in6 *)&addr)->sin6_addr, 16 );
530 memcpy( dst, &((struct sockaddr_in *)&addr)->sin_addr, 4 );
534 WSASetLastError( WSAEAFNOSUPPORT );
538 /* Assume IPv6 is not supported. */
539 /* Would be safer and more simpler to use inet_aton() but it is most
540 * likely not provided either. */
545 errno = EAFNOSUPPORT;
549 ipv4 = inet_addr( src );
550 if( ipv4 == INADDR_NONE )
553 memcpy( dst, &ipv4, 4 );
557 #endif /* HAVE_INET_PTON */