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 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 v_socket_t *const *restrict vsv,
140 uint8_t *restrict buf, size_t buflen,
141 int wait_ms, vlc_bool_t waitall )
148 return total; // output buffer full
151 if ((wait_ms != -1) && (wait_ms < 500))
155 struct pollfd ufd[fdc];
156 memset (ufd, 0, sizeof (ufd));
158 for (unsigned i = 0; i < fdc; i++)
161 ufd[i].events = POLLIN;
167 n = poll (ufd, fdc, (wait_ms == -1) ? -1 : delay_ms);
171 assert ((unsigned)n <= fdc);
173 for (int i = 0; n > 0; i++)
187 for (unsigned i = 0; i < fdc; i++)
189 #if !defined(WIN32) && !defined(UNDER_CE)
190 if (fdv[i] >= FD_SETSIZE)
192 /* We don't want to overflow select() fd_set */
193 msg_Err( p_this, "select set overflow" );
197 FD_SET (fdv[i], &set);
202 n = select (maxfd + 1, &set, NULL, NULL,
203 (wait_ms == -1) ? NULL
204 : &(struct timeval){ 0, delay_ms * 1000 });
208 for (unsigned i = 0; n > 0; i++)
209 if (FD_ISSET (fdv[i], &set))
223 n = (*vsv)->pf_recv ((*vsv)->p_sys, buf, buflen);
225 n = recv (*fdv, buf, buflen, 0);
229 #if defined(WIN32) || defined(UNDER_CE)
230 switch (WSAGetLastError())
233 /* only happens with vs != NULL (SSL) - not really an error */
238 /* On Win32, recv() fails if the datagram doesn't fit inside
239 * the passed buffer, even though the buffer will be filled
240 * with the first part of the datagram. */
241 msg_Err( p_this, "recv() failed. "
242 "Increase the mtu size (--mtu option)" );
247 if( errno == EAGAIN ) /* spurious wake-up (sucks if fdc > 1) */
267 return total; // timeout
270 msg_Err (p_this, "Receive error: %s", net_strerror (net_errno));
271 return (total > 0) ? total : -1;
275 /*****************************************************************************
277 *****************************************************************************
278 * Read from a network socket
279 * If b_retry is true, then we repeat until we have read the right amount of
281 *****************************************************************************/
282 int __net_Read( vlc_object_t *restrict p_this, int fd,
283 v_socket_t *restrict p_vs,
284 uint8_t *restrict p_data, int i_data, vlc_bool_t b_retry )
286 return net_ReadInner (p_this, 1, &(int){ fd }, &(v_socket_t *){ p_vs },
287 p_data, i_data, -1, b_retry);
291 /*****************************************************************************
292 * __net_ReadNonBlock:
293 *****************************************************************************
294 * Read from a network socket, non blocking mode (with timeout)
295 *****************************************************************************/
296 int __net_ReadNonBlock( vlc_object_t *restrict p_this, int fd,
297 v_socket_t *restrict p_vs,
298 uint8_t *restrict p_data, int i_data, mtime_t i_wait)
300 return net_ReadInner (p_this, 1, &(int){ fd }, &(v_socket_t *){ p_vs },
301 p_data, i_data, i_wait / 1000, VLC_FALSE);
305 /*****************************************************************************
307 *****************************************************************************
308 * Read from several sockets (with timeout). Takes data from the first socket
310 *****************************************************************************/
311 int __net_Select( vlc_object_t *restrict p_this, int *restrict pi_fd,
312 v_socket_t **restrict pp_vs,
313 int i_fd, uint8_t *restrict p_data, int i_data,
318 const v_socket_t *vsv[i_fd];
319 memset (vsv, 0, sizeof (vsv));
321 return net_ReadInner (p_this, i_fd, pi_fd, vsv, p_data, i_data,
322 i_wait / 1000, VLC_FALSE);
325 return net_ReadInner (p_this, i_fd, pi_fd, pp_vs, p_data, i_data,
326 i_wait / 1000, VLC_FALSE);
330 /* Write exact amount requested */
331 int __net_Write( vlc_object_t *p_this, int fd, v_socket_t *p_vs,
332 const uint8_t *p_data, int i_data )
334 struct timeval timeout;
340 vlc_bool_t b_die = p_this->b_die;
346 if( p_this->b_die != b_die )
351 /* Initialize file descriptor set */
353 FD_SET( fd, &fds_w );
355 FD_SET( fd, &fds_e );
357 /* We'll wait 0.5 second if nothing happens */
359 timeout.tv_usec = 500000;
361 } while( (i_ret = select(fd + 1, NULL, &fds_w, &fds_e, &timeout)) == 0
362 || ( i_ret < 0 && errno == EINTR ) );
366 #if defined(WIN32) || defined(UNDER_CE)
367 msg_Err( p_this, "network selection error (%d)", WSAGetLastError() );
369 msg_Err( p_this, "network selection error (%s)", strerror(errno) );
371 return i_total > 0 ? i_total : -1;
374 if( ( i_send = (p_vs != NULL)
375 ? p_vs->pf_send( p_vs->p_sys, p_data, i_data )
376 : send( fd, p_data, i_data, 0 ) ) < 0 )
378 /* XXX With udp for example, it will issue a message if the host
380 /* msg_Err( p_this, "send failed (%s)", strerror(errno) ); */
381 return i_total > 0 ? i_total : -1;
391 char *__net_Gets( vlc_object_t *p_this, int fd, v_socket_t *p_vs )
393 char *psz_line = NULL, *ptr = NULL;
394 size_t i_line = 0, i_max = 0;
399 if( i_line == i_max )
402 psz_line = realloc( psz_line, i_max );
403 ptr = psz_line + i_line;
406 if( net_Read( p_this, fd, p_vs, (uint8_t *)ptr, 1, VLC_TRUE ) != 1 )
425 if( ( ptr >= psz_line ) && ( *ptr == '\r' ) )
431 int net_Printf( vlc_object_t *p_this, int fd, v_socket_t *p_vs,
432 const char *psz_fmt, ... )
436 va_start( args, psz_fmt );
437 i_ret = net_vaPrintf( p_this, fd, p_vs, psz_fmt, args );
443 int __net_vaPrintf( vlc_object_t *p_this, int fd, v_socket_t *p_vs,
444 const char *psz_fmt, va_list args )
449 i_size = vasprintf( &psz, psz_fmt, args );
450 i_ret = __net_Write( p_this, fd, p_vs, (uint8_t *)psz, i_size ) < i_size
458 /*****************************************************************************
459 * inet_pton replacement for obsolete and/or crap operating systems
460 *****************************************************************************/
461 #ifndef HAVE_INET_PTON
462 int inet_pton(int af, const char *src, void *dst)
465 /* As we already know, Microsoft always go its own way, so even if they do
466 * provide IPv6, they don't provide the API. */
467 struct sockaddr_storage addr;
468 int len = sizeof( addr );
470 /* Damn it, they didn't even put LPCSTR for the firs parameter!!! */
472 wchar_t *workaround_for_ill_designed_api =
473 malloc( MAX_PATH * sizeof(wchar_t) );
474 mbstowcs( workaround_for_ill_designed_api, src, MAX_PATH );
475 workaround_for_ill_designed_api[MAX_PATH-1] = 0;
477 char *workaround_for_ill_designed_api = strdup( src );
480 if( !WSAStringToAddress( workaround_for_ill_designed_api, af, NULL,
481 (LPSOCKADDR)&addr, &len ) )
483 free( workaround_for_ill_designed_api );
486 free( workaround_for_ill_designed_api );
491 memcpy( dst, &((struct sockaddr_in6 *)&addr)->sin6_addr, 16 );
495 memcpy( dst, &((struct sockaddr_in *)&addr)->sin_addr, 4 );
499 WSASetLastError( WSAEAFNOSUPPORT );
503 /* Assume IPv6 is not supported. */
504 /* Would be safer and more simpler to use inet_aton() but it is most
505 * likely not provided either. */
510 errno = EAFNOSUPPORT;
514 ipv4 = inet_addr( src );
515 if( ipv4 == INADDR_NONE )
518 memcpy( dst, &ipv4, 4 );
522 #endif /* HAVE_INET_PTON */