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_common.h>
58 #include <vlc_network.h>
61 # define INADDR_ANY 0x00000000
64 # define INADDR_NONE 0xFFFFFFFF
67 #if defined(WIN32) || defined(UNDER_CE)
69 # define EAFNOSUPPORT WSAEAFNOSUPPORT
72 #ifdef HAVE_LINUX_DCCP_H
73 /* TODO: use glibc instead of linux-kernel headers */
74 # include <linux/dccp.h>
78 extern int rootwrap_bind (int family, int socktype, int protocol,
79 const struct sockaddr *addr, size_t alen);
81 int net_SetupSocket (int fd)
83 #if defined (WIN32) || defined (UNDER_CE)
84 ioctlsocket (fd, FIONBIO, &(unsigned long){ 1 });
86 fcntl (fd, F_SETFD, FD_CLOEXEC);
87 fcntl (fd, F_SETFL, fcntl (fd, F_GETFL, 0) | O_NONBLOCK);
90 setsockopt (fd, SOL_SOCKET, SO_REUSEADDR, &(int){ 1 }, sizeof (int));
95 int net_Socket (vlc_object_t *p_this, int family, int socktype,
98 int fd = socket (family, socktype, protocol);
101 if (net_errno != EAFNOSUPPORT)
102 msg_Err (p_this, "cannot create socket: %m");
106 net_SetupSocket (fd);
110 * Accepts only IPv6 connections on IPv6 sockets.
111 * If possible, we should open two sockets, but it is not always possible.
113 if (family == AF_INET6)
114 setsockopt (fd, IPPROTO_IPV6, IPV6_V6ONLY, &(int){ 1 }, sizeof (int));
117 #if defined (WIN32) || defined (UNDER_CE)
118 # ifndef IPV6_PROTECTION_LEVEL
119 # warning Please update your C library headers.
120 # define IPV6_PROTECTION_LEVEL 23
121 # define PROTECTION_LEVEL_UNRESTRICTED 10
123 if (family == AF_INET6)
124 setsockopt (fd, IPPROTO_IPV6, IPV6_PROTECTION_LEVEL,
125 &(int){ PROTECTION_LEVEL_UNRESTRICTED }, sizeof (int));
128 #ifdef DCCP_SOCKOPT_SERVICE
129 char *dccps = var_CreateGetNonEmptyString (p_this, "dccp-service");
132 setsockopt (fd, SOL_DCCP, DCCP_SOCKOPT_SERVICE, dccps,
133 (strlen (dccps) + 3) & ~3);
142 int *net_Listen (vlc_object_t *p_this, const char *psz_host,
143 int i_port, int protocol)
145 struct addrinfo hints, *res;
146 int socktype = SOCK_DGRAM;
151 socktype = SOCK_STREAM;
158 socktype = SOCK_DCCP;
163 memset (&hints, 0, sizeof( hints ));
164 /* Since we use port numbers rather than service names, the socket type
165 * does not really matter. */
166 hints.ai_socktype = SOCK_DGRAM;
167 hints.ai_flags = AI_PASSIVE;
169 msg_Dbg (p_this, "net: listening to %s port %d", psz_host, i_port);
171 int i_val = vlc_getaddrinfo (p_this, psz_host, i_port, &hints, &res);
174 msg_Err (p_this, "Cannot resolve %s port %d : %s", psz_host, i_port,
175 vlc_gai_strerror (i_val));
182 for (struct addrinfo *ptr = res; ptr != NULL; ptr = ptr->ai_next)
184 int fd = net_Socket (p_this, ptr->ai_family, socktype, protocol);
187 msg_Dbg (p_this, "socket error: %m");
191 /* Bind the socket */
192 #if defined (WIN32) || defined (UNDER_CE)
194 * Under Win32 and for multicasting, we bind to INADDR_ANY.
195 * This is of course a severe bug, since the socket would logically
196 * receive unicast traffic, and multicast traffic of groups subscribed
197 * to via other sockets.
199 if (net_SockAddrIsMulticast (ptr->ai_addr, ptr->ai_addrlen)
200 && (sizeof (struct sockaddr_storage) >= ptr->ai_addrlen))
202 // This works for IPv4 too - don't worry!
203 struct sockaddr_in6 dumb =
205 .sin6_family = ptr->ai_addr->sa_family,
206 .sin6_port = ((struct sockaddr_in *)(ptr->ai_addr))->sin_port
209 bind (fd, (struct sockaddr *)&dumb, ptr->ai_addrlen);
213 if (bind (fd, ptr->ai_addr, ptr->ai_addrlen))
216 #if !defined(WIN32) && !defined(UNDER_CE)
217 fd = rootwrap_bind (ptr->ai_family, ptr->ai_socktype,
218 protocol ?: ptr->ai_protocol, ptr->ai_addr,
222 msg_Dbg (p_this, "got socket %d from rootwrap", fd);
227 msg_Err (p_this, "socket bind error (%m)");
232 if (net_SockAddrIsMulticast (ptr->ai_addr, ptr->ai_addrlen))
234 if (net_Subscribe (p_this, fd, ptr->ai_addr, ptr->ai_addrlen))
250 if (listen (fd, INT_MAX))
252 msg_Err (p_this, "socket listen error (%m)");
258 int *nsockv = (int *)realloc (sockv, (sockc + 2) * sizeof (int));
261 nsockv[sockc++] = fd;
268 vlc_freeaddrinfo (res);
277 /*****************************************************************************
279 *****************************************************************************
280 * Reads from a network socket.
281 * If waitall is true, then we repeat until we have read the right amount of
282 * data; in that case, a short count means EOF has been reached or the VLC
283 * object has been signaled.
284 *****************************************************************************/
286 __net_Read (vlc_object_t *restrict p_this, int fd, const v_socket_t *vs,
287 uint8_t *restrict p_buf, size_t i_buflen, vlc_bool_t waitall)
290 struct pollfd ufd[2] = {
291 { .fd = fd, .events = POLLIN },
292 { .fd = vlc_object_waitpipe (p_this), .events = POLLIN },
296 return -1; /* vlc_object_waitpipe() sets errno */
300 ufd[0].revents = ufd[1].revents = 0;
302 if (poll (ufd, sizeof (ufd) / sizeof (ufd[0]), -1) < 0)
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))
326 assert (p_this->b_die);
327 msg_Dbg (p_this, "socket %d polling interrupted", fd);
328 #if defined(WIN32) || defined(UNDER_CE)
329 WSASetLastError (WSAEINTR);
337 assert (ufd[0].revents);
342 n = vs->pf_recv (vs->p_sys, p_buf, i_buflen);
347 n = recv (fd, p_buf, i_buflen, 0);
349 n = read (fd, p_buf, i_buflen);
355 #if defined(WIN32) || defined(UNDER_CE)
356 switch (WSAGetLastError ())
359 /* only happens with vs != NULL (TLS) - not really an error */
364 /* On Win32, recv() fails if the datagram doesn't fit inside
365 * the passed buffer, even though the buffer will be filled
366 * with the first part of the datagram. */
367 msg_Err (p_this, "Receive error: "
368 "Increase the mtu size (--mtu option)");
376 /* spurious wake-up or TLS did not yield any actual data */
384 /* For streams, this means end of file, and there will not be any
385 * further data ever on the stream. For datagram sockets, this
386 * means empty datagram, and there could be more data coming.
387 * However, it makes no sense to set <waitall> with datagrams in the
403 msg_Err (p_this, "Read error: %m");
408 /* Write exact amount requested */
409 ssize_t __net_Write( vlc_object_t *p_this, int fd, const v_socket_t *p_vs,
410 const uint8_t *p_data, size_t i_data )
413 struct pollfd ufd[2] = {
414 { .fd = fd, .events = POLLOUT },
415 { .fd = vlc_object_waitpipe (p_this), .events = POLLIN },
425 ufd[0].revents = ufd[1].revents = 0;
427 if (poll (ufd, 1, -1) == -1)
431 msg_Err (p_this, "Write error: %m");
439 /* Errors will be dequeued separately, upon next call. */
440 if (ufd[0].revents & (POLLERR|POLLNVAL|POLLHUP))
449 assert (p_this->b_die);
456 val = p_vs->pf_send (p_vs->p_sys, p_data, i_data);
459 val = send (fd, p_data, i_data, 0);
461 val = write (fd, p_data, i_data);
466 msg_Err (p_this, "Write error: %m");
475 if ((i_total > 0) || (i_data == 0))
482 char *__net_Gets( vlc_object_t *p_this, int fd, const v_socket_t *p_vs )
484 char *psz_line = NULL, *ptr = NULL;
485 size_t i_line = 0, i_max = 0;
490 if( i_line == i_max )
493 psz_line = realloc( psz_line, i_max );
494 ptr = psz_line + i_line;
497 if( net_Read( p_this, fd, p_vs, (uint8_t *)ptr, 1, VLC_TRUE ) != 1 )
516 if( ( ptr >= psz_line ) && ( *ptr == '\r' ) )
522 ssize_t net_Printf( vlc_object_t *p_this, int fd, const v_socket_t *p_vs,
523 const char *psz_fmt, ... )
527 va_start( args, psz_fmt );
528 i_ret = net_vaPrintf( p_this, fd, p_vs, psz_fmt, args );
534 ssize_t __net_vaPrintf( vlc_object_t *p_this, int fd, const v_socket_t *p_vs,
535 const char *psz_fmt, va_list args )
540 i_size = vasprintf( &psz, psz_fmt, args );
541 i_ret = __net_Write( p_this, fd, p_vs, (uint8_t *)psz, i_size ) < i_size
549 /*****************************************************************************
550 * inet_pton replacement for obsolete and/or crap operating systems
551 *****************************************************************************/
552 #ifndef HAVE_INET_PTON
553 int inet_pton(int af, const char *src, void *dst)
556 /* As we already know, Microsoft always go its own way, so even if they do
557 * provide IPv6, they don't provide the API. */
558 struct sockaddr_storage addr;
559 int len = sizeof( addr );
561 /* Damn it, they didn't even put LPCSTR for the firs parameter!!! */
563 wchar_t *workaround_for_ill_designed_api =
564 malloc( MAX_PATH * sizeof(wchar_t) );
565 mbstowcs( workaround_for_ill_designed_api, src, MAX_PATH );
566 workaround_for_ill_designed_api[MAX_PATH-1] = 0;
568 char *workaround_for_ill_designed_api = strdup( src );
571 if( !WSAStringToAddress( workaround_for_ill_designed_api, af, NULL,
572 (LPSOCKADDR)&addr, &len ) )
574 free( workaround_for_ill_designed_api );
577 free( workaround_for_ill_designed_api );
582 memcpy( dst, &((struct sockaddr_in6 *)&addr)->sin6_addr, 16 );
586 memcpy( dst, &((struct sockaddr_in *)&addr)->sin_addr, 4 );
590 WSASetLastError( WSAEAFNOSUPPORT );
594 /* Assume IPv6 is not supported. */
595 /* Would be safer and more simpler to use inet_aton() but it is most
596 * likely not provided either. */
601 errno = EAFNOSUPPORT;
605 ipv4 = inet_addr( src );
606 if( ipv4 == INADDR_NONE )
609 memcpy( dst, &ipv4, 4 );
613 #endif /* HAVE_INET_PTON */
615 #ifndef HAVE_INET_NTOP
617 const char *inet_ntop(int af, const void * src,
618 char * dst, socklen_t cnt)
625 struct sockaddr_in6 addr;
626 memset(&addr, 0, sizeof(addr));
627 addr.sin6_family = AF_INET6;
628 addr.sin6_addr = *((struct in6_addr*)src);
629 if( 0 == WSAAddressToStringA((LPSOCKADDR)&addr,
630 sizeof(struct sockaddr_in6),
636 errno = WSAGetLastError();
644 struct sockaddr_in addr;
645 memset(&addr, 0, sizeof(addr));
646 addr.sin_family = AF_INET;
647 addr.sin_addr = *((struct in_addr*)src);
648 if( 0 == WSAAddressToStringA((LPSOCKADDR)&addr,
649 sizeof(struct sockaddr_in),
655 errno = WSAGetLastError();
660 errno = EAFNOSUPPORT;