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vlc/include/vlc_network.h

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/*****************************************************************************
* vlc_network.h: interface to communicate with network plug-ins
*****************************************************************************
* Copyright (C) 2002-2005 the VideoLAN team
* Copyright © 2006-2007 Rémi Denis-Courmont
* $Id$
*
* Authors: Christophe Massiot <massiot@via.ecp.fr>
* Laurent Aimar <fenrir@via.ecp.fr>
* Rémi Denis-Courmont <rem # videolan.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
#ifndef VLC_NETWORK_H
# define VLC_NETWORK_H
/**
* \file
* This file defines interface to communicate with network plug-ins
*/
#if defined( WIN32 )
# if !defined(UNDER_CE)
# define _NO_OLDNAMES 1
# include <io.h>
# endif
# include <winsock2.h>
# include <ws2tcpip.h>
# define ENETUNREACH WSAENETUNREACH
# define net_errno (WSAGetLastError())
extern const char *net_strerror( int val );
struct iovec
{
void *iov_base;
size_t iov_len;
};
struct msghdr
{
void *msg_name;
size_t msg_namelen;
struct iovec *msg_iov;
size_t msg_iovlen;
void *msg_control;
size_t msg_controllen;
int msg_flags;
};
# ifndef IPV6_V6ONLY
# define IPV6_V6ONLY 27
# endif
#else
# include <sys/socket.h>
# ifdef HAVE_NETINET_IN_H
# include <netinet/in.h>
# endif
# ifdef HAVE_ARPA_INET_H
# include <arpa/inet.h>
# elif defined( SYS_BEOS )
# include <net/netdb.h>
# endif
# include <netdb.h>
# define net_errno errno
#endif
int vlc_socket (int, int, int, bool nonblock) LIBVLC_USED;
struct sockaddr;
VLC_EXPORT( int, vlc_accept, ( int, struct sockaddr *, socklen_t *, bool ) LIBVLC_USED );
# ifdef __cplusplus
extern "C" {
# endif
/* Portable networking layer communication */
int net_Socket (vlc_object_t *obj, int family, int socktype, int proto);
VLC_EXPORT( int, net_Connect, (vlc_object_t *p_this, const char *psz_host, int i_port, int socktype, int protocol) );
#define net_Connect(a, b, c, d, e) net_Connect(VLC_OBJECT(a), b, c, d, e)
VLC_EXPORT( int *, net_Listen, (vlc_object_t *p_this, const char *psz_host, int i_port, int protocol) );
#define net_ListenTCP(a, b, c) net_Listen(VLC_OBJECT(a), b, c, IPPROTO_TCP)
static inline int net_ConnectTCP (vlc_object_t *obj, const char *host, int port)
{
return net_Connect (obj, host, port, SOCK_STREAM, IPPROTO_TCP);
}
#define net_ConnectTCP(a, b, c) net_ConnectTCP(VLC_OBJECT(a), b, c)
VLC_EXPORT( int, net_AcceptSingle, (vlc_object_t *obj, int lfd) );
VLC_EXPORT( int, net_Accept, ( vlc_object_t *, int * ) );
#define net_Accept(a, b) \
net_Accept(VLC_OBJECT(a), b)
VLC_EXPORT( int, net_ConnectDgram, ( vlc_object_t *p_this, const char *psz_host, int i_port, int hlim, int proto ) );
#define net_ConnectDgram(a, b, c, d, e ) \
net_ConnectDgram(VLC_OBJECT(a), b, c, d, e)
static inline int net_ConnectUDP (vlc_object_t *obj, const char *host, int port, int hlim)
{
return net_ConnectDgram (obj, host, port, hlim, IPPROTO_UDP);
}
VLC_EXPORT( int, net_OpenDgram, ( vlc_object_t *p_this, const char *psz_bind, int i_bind, const char *psz_server, int i_server, int family, int proto ) );
#define net_OpenDgram( a, b, c, d, e, g, h ) \
net_OpenDgram(VLC_OBJECT(a), b, c, d, e, g, h)
static inline int net_ListenUDP1 (vlc_object_t *obj, const char *host, int port)
{
return net_OpenDgram (obj, host, port, NULL, 0, 0, IPPROTO_UDP);
}
VLC_EXPORT( void, net_ListenClose, ( int *fd ) );
int net_Subscribe (vlc_object_t *obj, int fd, const struct sockaddr *addr,
socklen_t addrlen);
VLC_EXPORT( int, net_SetCSCov, ( int fd, int sendcov, int recvcov ) );
/* Functions to read from or write to the networking layer */
struct virtual_socket_t
{
void *p_sys;
int (*pf_recv) ( void *, void *, int );
int (*pf_send) ( void *, const void *, int );
};
VLC_EXPORT( ssize_t, net_Read, ( vlc_object_t *p_this, int fd, const v_socket_t *, void *p_data, size_t i_data, bool b_retry ) );
#define net_Read(a,b,c,d,e,f) net_Read(VLC_OBJECT(a),b,c,d,e,f)
VLC_EXPORT( ssize_t, net_Write, ( vlc_object_t *p_this, int fd, const v_socket_t *, const void *p_data, size_t i_data ) );
#define net_Write(a,b,c,d,e) net_Write(VLC_OBJECT(a),b,c,d,e)
VLC_EXPORT( char *, net_Gets, ( vlc_object_t *p_this, int fd, const v_socket_t * ) );
#define net_Gets(a,b,c) net_Gets(VLC_OBJECT(a),b,c)
VLC_EXPORT( ssize_t, net_Printf, ( vlc_object_t *p_this, int fd, const v_socket_t *, const char *psz_fmt, ... ) LIBVLC_FORMAT( 4, 5 ) );
#define net_Printf(o,fd,vs,...) net_Printf(VLC_OBJECT(o),fd,vs, __VA_ARGS__)
VLC_EXPORT( ssize_t, net_vaPrintf, ( vlc_object_t *p_this, int fd, const v_socket_t *, const char *psz_fmt, va_list args ) );
#define net_vaPrintf(a,b,c,d,e) net_vaPrintf(VLC_OBJECT(a),b,c,d,e)
VLC_EXPORT (int, vlc_inet_pton, (int af, const char *src, void *dst) );
VLC_EXPORT (const char *, vlc_inet_ntop, (int af, const void *src,
char *dst, socklen_t cnt) );
struct pollfd;
VLC_EXPORT (int, vlc_poll, (struct pollfd *fds, unsigned nfds, int timeout));
#ifdef WIN32
/* Microsoft: same semantic, same value, different name... go figure */
# define SHUT_RD SD_RECEIVE
# define SHUT_WR SD_SEND
# define SHUT_RDWR SD_BOTH
# define net_Close( fd ) closesocket ((SOCKET)fd)
#else
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
# define net_Close( fd ) (void)close (fd)
#endif
/* Portable network names/addresses resolution layer */
/* GAI error codes */
# ifndef EAI_BADFLAGS
# define EAI_BADFLAGS -1
# endif
# ifndef EAI_NONAME
# define EAI_NONAME -2
# endif
# ifndef EAI_AGAIN
# define EAI_AGAIN -3
# endif
# ifndef EAI_FAIL
# define EAI_FAIL -4
# endif
# ifndef EAI_NODATA
# define EAI_NODATA -5
# endif
# ifndef EAI_FAMILY
# define EAI_FAMILY -6
# endif
# ifndef EAI_SOCKTYPE
# define EAI_SOCKTYPE -7
# endif
# ifndef EAI_SERVICE
# define EAI_SERVICE -8
# endif
# ifndef EAI_ADDRFAMILY
# define EAI_ADDRFAMILY -9
# endif
# ifndef EAI_MEMORY
# define EAI_MEMORY -10
# endif
#ifndef EAI_OVERFLOW
# define EAI_OVERFLOW -11
#endif
# ifndef EAI_SYSTEM
# define EAI_SYSTEM -12
# endif
# ifndef NI_MAXHOST
# define NI_MAXHOST 1025
# define NI_MAXSERV 32
# endif
# define NI_MAXNUMERICHOST 64
# ifndef NI_NUMERICHOST
# define NI_NUMERICHOST 0x01
# define NI_NUMERICSERV 0x02
# define NI_NOFQDN 0x04
# define NI_NAMEREQD 0x08
# define NI_DGRAM 0x10
# endif
# ifndef HAVE_STRUCT_ADDRINFO
struct addrinfo
{
int ai_flags;
int ai_family;
int ai_socktype;
int ai_protocol;
size_t ai_addrlen;
struct sockaddr *ai_addr;
char *ai_canonname;
struct addrinfo *ai_next;
};
# define AI_PASSIVE 1
# define AI_CANONNAME 2
# define AI_NUMERICHOST 4
# endif /* if !HAVE_STRUCT_ADDRINFO */
#ifndef AI_NUMERICSERV
# define AI_NUMERICSERV 0
#endif
VLC_EXPORT( const char *, vlc_gai_strerror, ( int ) );
VLC_EXPORT( int, vlc_getnameinfo, ( const struct sockaddr *, int, char *, int, int *, int ) );
VLC_EXPORT( int, vlc_getaddrinfo, ( vlc_object_t *, const char *, int, const struct addrinfo *, struct addrinfo ** ) );
VLC_EXPORT( void, vlc_freeaddrinfo, ( struct addrinfo * ) );
static inline bool
net_SockAddrIsMulticast (const struct sockaddr *addr, socklen_t len)
{
switch (addr->sa_family)
{
#ifdef IN_MULTICAST
case AF_INET:
{
const struct sockaddr_in *v4 = (const struct sockaddr_in *)addr;
if ((size_t)len < sizeof (*v4))
return false;
return IN_MULTICAST (ntohl (v4->sin_addr.s_addr)) != 0;
}
#endif
#ifdef IN6_IS_ADDR_MULTICAST
case AF_INET6:
{
const struct sockaddr_in6 *v6 = (const struct sockaddr_in6 *)addr;
if ((size_t)len < sizeof (*v6))
return false;
return IN6_IS_ADDR_MULTICAST (&v6->sin6_addr) != 0;
}
#endif
}
return false;
}
static inline int net_GetSockAddress( int fd, char *address, int *port )
{
struct sockaddr_storage addr;
socklen_t addrlen = sizeof( addr );
return getsockname( fd, (struct sockaddr *)&addr, &addrlen )
|| vlc_getnameinfo( (struct sockaddr *)&addr, addrlen, address,
NI_MAXNUMERICHOST, port, NI_NUMERICHOST )
? VLC_EGENERIC : 0;
}
static inline int net_GetPeerAddress( int fd, char *address, int *port )
{
struct sockaddr_storage addr;
socklen_t addrlen = sizeof( addr );
return getpeername( fd, (struct sockaddr *)&addr, &addrlen )
|| vlc_getnameinfo( (struct sockaddr *)&addr, addrlen, address,
NI_MAXNUMERICHOST, port, NI_NUMERICHOST )
? VLC_EGENERIC : 0;
}
static inline uint16_t net_GetPort (const struct sockaddr *addr)
{
switch (addr->sa_family)
{
#ifdef AF_INET6
case AF_INET6:
return ((const struct sockaddr_in6 *)addr)->sin6_port;
#endif
case AF_INET:
return ((const struct sockaddr_in *)addr)->sin_port;
}
return 0;
}
static inline void net_SetPort (struct sockaddr *addr, uint16_t port)
{
switch (addr->sa_family)
{
#ifdef AF_INET6
case AF_INET6:
((struct sockaddr_in6 *)addr)->sin6_port = port;
break;
#endif
case AF_INET:
((struct sockaddr_in *)addr)->sin_port = port;
break;
}
}
# ifdef __cplusplus
}
# endif
#endif
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