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 extern int rootwrap_bind (int family, int socktype, int protocol,
66 const struct sockaddr *addr, size_t alen);
68 int net_Socket (vlc_object_t *p_this, int family, int socktype,
71 int fd = socket (family, socktype, protocol);
74 if (net_errno != EAFNOSUPPORT)
75 msg_Err (p_this, "cannot create socket: %s",
76 net_strerror (net_errno));
80 #if defined (WIN32) || defined (UNDER_CE)
81 ioctlsocket (fd, FIONBIO, &(unsigned long){ 1 });
83 fcntl (fd, F_SETFD, FD_CLOEXEC);
84 fcntl (fd, F_SETFL, fcntl (fd, F_GETFL, 0) | O_NONBLOCK);
87 setsockopt (fd, SOL_SOCKET, SO_REUSEADDR, &(int){ 1 }, sizeof (int));
91 * Accepts only IPv6 connections on IPv6 sockets
92 * (and open an IPv4 socket later as well if needed).
93 * Only Linux and FreeBSD can map IPv4 connections on IPv6 sockets,
94 * so this allows for more uniform handling across platforms. Besides,
95 * it makes sure that IPv4 addresses will be printed as w.x.y.z rather
98 if (family == AF_INET6)
99 setsockopt (fd, IPPROTO_IPV6, IPV6_V6ONLY, &(int){ 1 }, sizeof (int));
102 #if defined (WIN32) || defined (UNDER_CE)
103 # ifndef IPV6_PROTECTION_LEVEL
104 # define IPV6_PROTECTION_LEVEL 23
105 # define PROTECTION_LEVEL_UNRESTRICTED 30
107 if (family == AF_INET6)
108 setsockopt (fd, IPPROTO_IPV6, IPV6_PROTECTION_LEVEL,
109 &(int){ PROTECTION_LEVEL_UNRESTRICTED }, sizeof (int));
116 int *net_Listen (vlc_object_t *p_this, const char *psz_host, int i_port,
117 int family, int socktype, int protocol)
119 struct addrinfo hints, *res;
121 memset (&hints, 0, sizeof( hints ));
122 hints.ai_family = family;
123 hints.ai_socktype = socktype;
124 hints.ai_protocol = protocol;
125 hints.ai_flags = AI_PASSIVE;
127 msg_Dbg (p_this, "net: listening to %s port %d", psz_host, i_port);
129 int i_val = vlc_getaddrinfo (p_this, psz_host, i_port, &hints, &res);
132 msg_Err (p_this, "Cannot resolve %s port %d : %s", psz_host, i_port,
133 vlc_gai_strerror (i_val));
140 for (struct addrinfo *ptr = res; ptr != NULL; ptr = ptr->ai_next)
142 int fd = net_Socket (p_this, ptr->ai_family, ptr->ai_socktype,
146 msg_Dbg (p_this, "socket error: %s", net_strerror (net_errno));
150 /* Bind the socket */
151 if (bind (fd, ptr->ai_addr, ptr->ai_addrlen))
153 int saved_errno = net_errno;
156 #if !defined(WIN32) && !defined(UNDER_CE)
157 fd = rootwrap_bind (ptr->ai_family, ptr->ai_socktype,
158 ptr->ai_protocol, ptr->ai_addr,
162 msg_Dbg (p_this, "got socket %d from rootwrap", fd);
167 msg_Err (p_this, "socket bind error (%s)",
168 net_strerror( saved_errno ) );
174 switch (ptr->ai_socktype)
179 if (listen (fd, INT_MAX))
181 msg_Err (p_this, "socket listen error (%s)",
182 net_strerror (net_errno));
188 int *nsockv = (int *)realloc (sockv, (sockc + 2) * sizeof (int));
191 nsockv[sockc++] = fd;
198 vlc_freeaddrinfo (res);
207 /*****************************************************************************
209 *****************************************************************************
210 * Close a network handle
211 *****************************************************************************/
212 void net_Close (int fd)
215 CloseHandle ((HANDLE)fd);
216 #elif defined (WIN32)
225 net_ReadInner( vlc_object_t *restrict p_this, unsigned fdc, const int *fdv,
226 const v_socket_t *const *restrict vsv,
227 uint8_t *restrict p_buf, size_t i_buflen,
228 int wait_ms, vlc_bool_t waitall )
237 struct pollfd ufd[fdc];
244 if ((wait_ms != -1) && (wait_ms < 500))
254 memset (ufd, 0, sizeof (ufd));
256 for( i = 0; i < fdc; i++ )
259 ufd[i].events = POLLIN;
262 n = poll( ufd, fdc, delay_ms );
266 for( i = 0; i < fdc; i++ )
268 #if !defined(WIN32) && !defined(UNDER_CE)
269 if( fdv[i] >= FD_SETSIZE )
271 /* We don't want to overflow select() fd_set */
272 msg_Err( p_this, "select set overflow" );
276 FD_SET( fdv[i], &set );
281 n = select( maxfd + 1, &set, NULL, NULL,
282 (wait_ms == -1) ? NULL
283 : &(struct timeval){ 0, delay_ms * 1000 } );
288 assert ((unsigned)n <= fdc);
290 if (n == 0) // timeout
296 if ((i_total > 0) && (ufd[i].revents & POLLERR))
297 return i_total; // error will be dequeued on next run
299 if ((ufd[i].revents & POLLIN) == 0)
301 if (!FD_ISSET (fdv[i], &set))
312 n = (*vsv)->pf_recv( (*vsv)->p_sys, p_buf, i_buflen );
316 #if defined(WIN32) || defined(UNDER_CE)
317 n = recv( *fdv, p_buf, i_buflen, 0 );
319 n = read( *fdv, p_buf, i_buflen );
325 #if defined(WIN32) || defined(UNDER_CE)
326 switch( WSAGetLastError() )
329 /* only happens with vs != NULL (SSL) - not really an error */
334 /* On Win32, recv() fails if the datagram doesn't fit inside
335 * the passed buffer, even though the buffer will be filled
336 * with the first part of the datagram. */
337 msg_Err( p_this, "Receive error: "
338 "Increase the mtu size (--mtu option)" );
343 if( errno == EAGAIN ) /* spurious wake-up (sucks if fdc > 1) */
363 return i_total; // time's up!
369 msg_Err( p_this, "Read error: %s", net_strerror (net_errno) );
370 return i_total ? (ssize_t)i_total : -1;
374 /*****************************************************************************
376 *****************************************************************************
377 * Read from a network socket
378 * If b_retry is true, then we repeat until we have read the right amount of
380 *****************************************************************************/
381 int __net_Read( vlc_object_t *restrict p_this, int fd,
382 const v_socket_t *restrict p_vs,
383 uint8_t *restrict p_data, int i_data, vlc_bool_t b_retry )
385 return net_ReadInner( p_this, 1, &(int){ fd },
386 &(const v_socket_t *){ p_vs },
387 p_data, i_data, -1, b_retry );
391 /*****************************************************************************
392 * __net_ReadNonBlock:
393 *****************************************************************************
394 * Read from a network socket, non blocking mode (with timeout)
395 *****************************************************************************/
396 int __net_ReadNonBlock( vlc_object_t *restrict p_this, int fd,
397 const v_socket_t *restrict p_vs,
398 uint8_t *restrict p_data, int i_data, mtime_t i_wait)
400 return net_ReadInner (p_this, 1, &(int){ fd },
401 &(const v_socket_t *){ p_vs },
402 p_data, i_data, i_wait / 1000, VLC_FALSE);
406 /*****************************************************************************
408 *****************************************************************************
409 * Read from several sockets (with timeout). Takes data from the first socket
411 *****************************************************************************/
412 int __net_Select( vlc_object_t *restrict p_this, const int *restrict pi_fd,
413 const v_socket_t *const *restrict pp_vs,
414 int i_fd, uint8_t *restrict p_data, int i_data,
419 const v_socket_t *vsv[i_fd];
420 memset( vsv, 0, sizeof (vsv) );
422 return net_ReadInner( p_this, i_fd, pi_fd, vsv, p_data, i_data,
423 i_wait / 1000, VLC_FALSE );
426 return net_ReadInner( p_this, i_fd, pi_fd, pp_vs, p_data, i_data,
427 i_wait / 1000, VLC_FALSE );
431 /* Write exact amount requested */
432 int __net_Write( vlc_object_t *p_this, int fd, const v_socket_t *p_vs,
433 const uint8_t *p_data, int i_data )
443 struct pollfd ufd[1];
444 memset (ufd, 0, sizeof (ufd));
446 ufd[0].events = POLLOUT;
448 int val = poll (ufd, 1, 500);
449 if ((val > 0) && (ufd[0].revents & POLLERR) && (i_total > 0))
450 return i_total; // error will be dequeued separately on next call
455 #if !defined(WIN32) && !defined(UNDER_CE)
456 if (fd >= FD_SETSIZE)
458 /* We don't want to overflow select() fd_set */
459 msg_Err (p_this, "select set overflow");
465 int val = select (fd + 1, NULL, &set, NULL,
466 &(struct timeval){ 0, 500000 });
473 msg_Err (p_this, "Write error: %s",
474 net_strerror (net_errno));
475 return i_total ? (int)i_total : -1;
483 val = p_vs->pf_send (p_vs->p_sys, p_data, i_data);
485 #if defined(WIN32) || defined(UNDER_CE)
486 val = send (fd, p_data, i_data, 0);
488 val = write (fd, p_data, i_data);
492 return i_total ? (int)i_total : -1;
504 char *__net_Gets( vlc_object_t *p_this, int fd, const v_socket_t *p_vs )
506 char *psz_line = NULL, *ptr = NULL;
507 size_t i_line = 0, i_max = 0;
512 if( i_line == i_max )
515 psz_line = realloc( psz_line, i_max );
516 ptr = psz_line + i_line;
519 if( net_Read( p_this, fd, p_vs, (uint8_t *)ptr, 1, VLC_TRUE ) != 1 )
538 if( ( ptr >= psz_line ) && ( *ptr == '\r' ) )
544 int net_Printf( vlc_object_t *p_this, int fd, const v_socket_t *p_vs,
545 const char *psz_fmt, ... )
549 va_start( args, psz_fmt );
550 i_ret = net_vaPrintf( p_this, fd, p_vs, psz_fmt, args );
556 int __net_vaPrintf( vlc_object_t *p_this, int fd, const v_socket_t *p_vs,
557 const char *psz_fmt, va_list args )
562 i_size = vasprintf( &psz, psz_fmt, args );
563 i_ret = __net_Write( p_this, fd, p_vs, (uint8_t *)psz, i_size ) < i_size
571 /*****************************************************************************
572 * inet_pton replacement for obsolete and/or crap operating systems
573 *****************************************************************************/
574 #ifndef HAVE_INET_PTON
575 int inet_pton(int af, const char *src, void *dst)
578 /* As we already know, Microsoft always go its own way, so even if they do
579 * provide IPv6, they don't provide the API. */
580 struct sockaddr_storage addr;
581 int len = sizeof( addr );
583 /* Damn it, they didn't even put LPCSTR for the firs parameter!!! */
585 wchar_t *workaround_for_ill_designed_api =
586 malloc( MAX_PATH * sizeof(wchar_t) );
587 mbstowcs( workaround_for_ill_designed_api, src, MAX_PATH );
588 workaround_for_ill_designed_api[MAX_PATH-1] = 0;
590 char *workaround_for_ill_designed_api = strdup( src );
593 if( !WSAStringToAddress( workaround_for_ill_designed_api, af, NULL,
594 (LPSOCKADDR)&addr, &len ) )
596 free( workaround_for_ill_designed_api );
599 free( workaround_for_ill_designed_api );
604 memcpy( dst, &((struct sockaddr_in6 *)&addr)->sin6_addr, 16 );
608 memcpy( dst, &((struct sockaddr_in *)&addr)->sin_addr, 4 );
612 WSASetLastError( WSAEAFNOSUPPORT );
616 /* Assume IPv6 is not supported. */
617 /* Would be safer and more simpler to use inet_aton() but it is most
618 * likely not provided either. */
623 errno = EAFNOSUPPORT;
627 ipv4 = inet_addr( src );
628 if( ipv4 == INADDR_NONE )
631 memcpy( dst, &ipv4, 4 );
635 #endif /* HAVE_INET_PTON */