1 /*****************************************************************************
2 * io.c: network I/O functions
3 *****************************************************************************
4 * Copyright (C) 2004-2005, 2007 the VideoLAN team
5 * Copyright © 2005-2006 Rémi Denis-Courmont
8 * Authors: Laurent Aimar <fenrir@videolan.org>
9 * Rémi Denis-Courmont <rem # videolan.org>
10 * Christophe Mutricy <xtophe at videolan dot org>
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
25 *****************************************************************************/
27 /*****************************************************************************
29 *****************************************************************************/
47 #ifdef HAVE_SYS_TIME_H
48 # include <sys/time.h>
57 #include <vlc_network.h>
60 # define INADDR_ANY 0x00000000
63 # define INADDR_NONE 0xFFFFFFFF
66 #if defined(WIN32) || defined(UNDER_CE)
68 # define EAFNOSUPPORT WSAEAFNOSUPPORT
71 extern int rootwrap_bind (int family, int socktype, int protocol,
72 const struct sockaddr *addr, size_t alen);
74 int net_SetupSocket (int fd)
76 #if defined (WIN32) || defined (UNDER_CE)
77 ioctlsocket (fd, FIONBIO, &(unsigned long){ 1 });
79 fcntl (fd, F_SETFD, FD_CLOEXEC);
80 fcntl (fd, F_SETFL, fcntl (fd, F_GETFL, 0) | O_NONBLOCK);
83 setsockopt (fd, SOL_SOCKET, SO_REUSEADDR, &(int){ 1 }, sizeof (int));
88 int net_Socket (vlc_object_t *p_this, int family, int socktype,
91 int fd = socket (family, socktype, protocol);
94 if (net_errno != EAFNOSUPPORT)
95 msg_Err (p_this, "cannot create socket: %m");
103 * Accepts only IPv6 connections on IPv6 sockets.
104 * If possible, we should open two sockets, but it is not always possible.
106 if (family == AF_INET6)
107 setsockopt (fd, IPPROTO_IPV6, IPV6_V6ONLY, &(int){ 1 }, sizeof (int));
110 #if defined (WIN32) || defined (UNDER_CE)
111 # ifndef IPV6_PROTECTION_LEVEL
112 # warning Please update your C library headers.
113 # define IPV6_PROTECTION_LEVEL 23
114 # define PROTECTION_LEVEL_UNRESTRICTED 10
116 if (family == AF_INET6)
117 setsockopt (fd, IPPROTO_IPV6, IPV6_PROTECTION_LEVEL,
118 &(int){ PROTECTION_LEVEL_UNRESTRICTED }, sizeof (int));
125 int *net_Listen (vlc_object_t *p_this, const char *psz_host,
126 int i_port, int protocol)
128 struct addrinfo hints, *res;
129 int socktype = SOCK_DGRAM;
134 socktype = SOCK_STREAM;
141 socktype = SOCK_DCCP;
146 memset (&hints, 0, sizeof( hints ));
147 /* Since we use port numbers rather than service names, the socket type
148 * does not really matter. */
149 hints.ai_socktype = SOCK_DGRAM;
150 hints.ai_flags = AI_PASSIVE;
152 msg_Dbg (p_this, "net: listening to %s port %d", psz_host, i_port);
154 int i_val = vlc_getaddrinfo (p_this, psz_host, i_port, &hints, &res);
157 msg_Err (p_this, "Cannot resolve %s port %d : %s", psz_host, i_port,
158 vlc_gai_strerror (i_val));
165 for (struct addrinfo *ptr = res; ptr != NULL; ptr = ptr->ai_next)
167 int fd = net_Socket (p_this, ptr->ai_family, socktype, protocol);
170 msg_Dbg (p_this, "socket error: %m");
174 /* Bind the socket */
175 #if defined (WIN32) || defined (UNDER_CE)
177 * Under Win32 and for multicasting, we bind to INADDR_ANY.
178 * This is of course a severe bug, since the socket would logically
179 * receive unicast traffic, and multicast traffic of groups subscribed
180 * to via other sockets.
182 if (net_SockAddrIsMulticast (ptr->ai_addr, ptr->ai_addrlen)
183 && (sizeof (struct sockaddr_storage) >= ptr->ai_addrlen))
185 // This works for IPv4 too - don't worry!
186 struct sockaddr_in6 dumb =
188 .sin6_family = ptr->ai_addr->sa_family,
189 .sin6_port = ((struct sockaddr_in *)(ptr->ai_addr))->sin_port
192 bind (fd, (struct sockaddr *)&dumb, ptr->ai_addrlen);
196 if (bind (fd, ptr->ai_addr, ptr->ai_addrlen))
199 #if !defined(WIN32) && !defined(UNDER_CE)
200 fd = rootwrap_bind (ptr->ai_family, ptr->ai_socktype,
201 protocol ?: ptr->ai_protocol, ptr->ai_addr,
205 msg_Dbg (p_this, "got socket %d from rootwrap", fd);
210 msg_Err (p_this, "socket bind error (%m)");
215 if (net_SockAddrIsMulticast (ptr->ai_addr, ptr->ai_addrlen))
217 if (net_Subscribe (p_this, fd, ptr->ai_addr, ptr->ai_addrlen))
233 if (listen (fd, INT_MAX))
235 msg_Err (p_this, "socket listen error (%m)");
241 int *nsockv = (int *)realloc (sockv, (sockc + 2) * sizeof (int));
244 nsockv[sockc++] = fd;
251 vlc_freeaddrinfo (res);
260 /*****************************************************************************
262 *****************************************************************************
263 * Reads from a network socket.
264 * If waitall is true, then we repeat until we have read the right amount of
265 * data; in that case, a short count means EOF has been reached or the VLC
266 * object has been signaled.
267 *****************************************************************************/
269 __net_Read (vlc_object_t *restrict p_this, int fd, const v_socket_t *vs,
270 uint8_t *restrict p_buf, size_t i_buflen, vlc_bool_t waitall)
273 struct pollfd ufd[2] = {
274 { .fd = fd, .events = POLLIN },
275 { .fd = vlc_object_waitpipe (p_this), .events = POLLIN },
279 return -1; /* vlc_object_waitpipe() sets errno */
285 ufd[0].revents = ufd[1].revents = 0;
287 val = poll (ufd, sizeof (ufd) / sizeof (ufd[0]), -1);
294 msg_Dbg (p_this, "socket %d polling interrupted", fd);
297 #if defined(WIN32) || defined(UNDER_CE)
298 WSASetLastError (WSAEINTR);
307 assert (ufd[0].revents);
309 #ifndef POLLRDHUP /* This is nice but non-portable */
314 /* Errors (-1) and EOF (0) will be returned on next call,
315 * otherwise we'd "hide" the error from the caller, which is a
317 if (ufd[0].revents & (POLLERR|POLLNVAL|POLLRDHUP))
324 n = vs->pf_recv (vs->p_sys, p_buf, i_buflen);
329 n = recv (fd, p_buf, i_buflen, 0);
331 n = read (fd, p_buf, i_buflen);
337 #if defined(WIN32) || defined(UNDER_CE)
338 switch (WSAGetLastError ())
341 /* only happens with vs != NULL (TLS) - not really an error */
346 /* On Win32, recv() fails if the datagram doesn't fit inside
347 * the passed buffer, even though the buffer will be filled
348 * with the first part of the datagram. */
349 msg_Err (p_this, "Receive error: "
350 "Increase the mtu size (--mtu option)");
358 /* spurious wake-up or TLS did not yield any actual data */
366 /* For streams, this means end of file, and there will not be any
367 * further data ever on the stream. For datagram sockets, this
368 * means empty datagram, and there could be more data coming.
369 * However, it makes no sense to set <waitall> with datagrams in the
385 msg_Err (p_this, "Read error: %m");
390 /* Write exact amount requested */
391 ssize_t __net_Write( vlc_object_t *p_this, int fd, const v_socket_t *p_vs,
392 const uint8_t *p_data, size_t i_data )
401 struct pollfd ufd[1];
402 memset (ufd, 0, sizeof (ufd));
404 ufd[0].events = POLLOUT;
406 int val = poll (ufd, 1, 500);
410 msg_Err (p_this, "Write error: %m");
417 if ((ufd[0].revents & (POLLERR|POLLNVAL|POLLHUP)) && (i_total > 0))
418 return i_total; // error will be dequeued separately on next call
421 val = p_vs->pf_send (p_vs->p_sys, p_data, i_data);
424 val = send (fd, p_data, i_data, 0);
426 val = write (fd, p_data, i_data);
431 msg_Err (p_this, "Write error: %m");
441 if ((i_total > 0) || (i_data == 0))
447 char *__net_Gets( vlc_object_t *p_this, int fd, const v_socket_t *p_vs )
449 char *psz_line = NULL, *ptr = NULL;
450 size_t i_line = 0, i_max = 0;
455 if( i_line == i_max )
458 psz_line = realloc( psz_line, i_max );
459 ptr = psz_line + i_line;
462 if( net_Read( p_this, fd, p_vs, (uint8_t *)ptr, 1, VLC_TRUE ) != 1 )
481 if( ( ptr >= psz_line ) && ( *ptr == '\r' ) )
487 ssize_t net_Printf( vlc_object_t *p_this, int fd, const v_socket_t *p_vs,
488 const char *psz_fmt, ... )
492 va_start( args, psz_fmt );
493 i_ret = net_vaPrintf( p_this, fd, p_vs, psz_fmt, args );
499 ssize_t __net_vaPrintf( vlc_object_t *p_this, int fd, const v_socket_t *p_vs,
500 const char *psz_fmt, va_list args )
505 i_size = vasprintf( &psz, psz_fmt, args );
506 i_ret = __net_Write( p_this, fd, p_vs, (uint8_t *)psz, i_size ) < i_size
514 /*****************************************************************************
515 * inet_pton replacement for obsolete and/or crap operating systems
516 *****************************************************************************/
517 #ifndef HAVE_INET_PTON
518 int inet_pton(int af, const char *src, void *dst)
521 /* As we already know, Microsoft always go its own way, so even if they do
522 * provide IPv6, they don't provide the API. */
523 struct sockaddr_storage addr;
524 int len = sizeof( addr );
526 /* Damn it, they didn't even put LPCSTR for the firs parameter!!! */
528 wchar_t *workaround_for_ill_designed_api =
529 malloc( MAX_PATH * sizeof(wchar_t) );
530 mbstowcs( workaround_for_ill_designed_api, src, MAX_PATH );
531 workaround_for_ill_designed_api[MAX_PATH-1] = 0;
533 char *workaround_for_ill_designed_api = strdup( src );
536 if( !WSAStringToAddress( workaround_for_ill_designed_api, af, NULL,
537 (LPSOCKADDR)&addr, &len ) )
539 free( workaround_for_ill_designed_api );
542 free( workaround_for_ill_designed_api );
547 memcpy( dst, &((struct sockaddr_in6 *)&addr)->sin6_addr, 16 );
551 memcpy( dst, &((struct sockaddr_in *)&addr)->sin_addr, 4 );
555 WSASetLastError( WSAEAFNOSUPPORT );
559 /* Assume IPv6 is not supported. */
560 /* Would be safer and more simpler to use inet_aton() but it is most
561 * likely not provided either. */
566 errno = EAFNOSUPPORT;
570 ipv4 = inet_addr( src );
571 if( ipv4 == INADDR_NONE )
574 memcpy( dst, &ipv4, 4 );
578 #endif /* HAVE_INET_PTON */
580 #ifndef HAVE_INET_NTOP
582 const char *inet_ntop(int af, const void * src,
583 char * dst, socklen_t cnt)
590 struct sockaddr_in6 addr;
591 memset(&addr, 0, sizeof(addr));
592 addr.sin6_family = AF_INET6;
593 addr.sin6_addr = *((struct in6_addr*)src);
594 if( 0 == WSAAddressToStringA((LPSOCKADDR)&addr,
595 sizeof(struct sockaddr_in6),
601 errno = WSAGetLastError();
609 struct sockaddr_in addr;
610 memset(&addr, 0, sizeof(addr));
611 addr.sin_family = AF_INET;
612 addr.sin_addr = *((struct in_addr*)src);
613 if( 0 == WSAAddressToStringA((LPSOCKADDR)&addr,
614 sizeof(struct sockaddr_in),
620 errno = WSAGetLastError();
625 errno = EAFNOSUPPORT;