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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 VLC authors and VideoLAN
* 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 Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser 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 )
# define _NO_OLDNAMES 1
# include <io.h>
# include <winsock2.h>
# include <ws2tcpip.h>
# define net_errno (WSAGetLastError())
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/types.h>
# include <unistd.h>
# include <sys/socket.h>
# include <netinet/in.h>
# include <netdb.h>
# define net_errno errno
#endif
#ifndef MSG_NOSIGNAL
# define MSG_NOSIGNAL 0
#endif
VLC_API int vlc_socket (int, int, int, bool nonblock) VLC_USED;
struct sockaddr;
VLC_API int vlc_accept( int, struct sockaddr *, socklen_t *, bool ) VLC_USED;
# ifdef __cplusplus
extern "C" {
# endif
/* Portable networking layer communication */
int net_Socket (vlc_object_t *obj, int family, int socktype, int proto);
VLC_API 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_API int * net_Listen(vlc_object_t *p_this, const char *psz_host, int i_port, int socktype, int protocol);
#define net_ListenTCP(a, b, c) net_Listen(VLC_OBJECT(a), b, c, \
SOCK_STREAM, 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_API int net_AcceptSingle(vlc_object_t *obj, int lfd);
VLC_API int net_Accept( vlc_object_t *, int * );
#define net_Accept(a, b) \
net_Accept(VLC_OBJECT(a), b)
VLC_API 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_API int net_OpenDgram( vlc_object_t *p_this, const char *psz_bind, int i_bind, const char *psz_server, int i_server, int proto );
#define net_OpenDgram( a, b, c, d, e, g ) \
net_OpenDgram(VLC_OBJECT(a), b, c, d, e, g)
static inline int net_ListenUDP1 (vlc_object_t *obj, const char *host, int port)
{
return net_OpenDgram (obj, host, port, NULL, 0, IPPROTO_UDP);
}
VLC_API void net_ListenClose( int *fd );
int net_Subscribe (vlc_object_t *obj, int fd, const struct sockaddr *addr,
socklen_t addrlen);
VLC_API 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 *, size_t );
int (*pf_send) ( void *, const void *, size_t );
};
VLC_API ssize_t net_Read( vlc_object_t *p_this, int fd, void *p_data, size_t i_data );
#define net_Read(a,b,c,d) net_Read(VLC_OBJECT(a),b,c,d)
VLC_API ssize_t net_Write( vlc_object_t *p_this, int fd, const void *p_data, size_t i_data );
#define net_Write(a,b,c,d) net_Write(VLC_OBJECT(a),b,c,d)
VLC_API char * net_Gets( vlc_object_t *p_this, int fd );
#define net_Gets(a,b) net_Gets(VLC_OBJECT(a),b)
VLC_API ssize_t net_Printf( vlc_object_t *p_this, int fd, const char *psz_fmt, ... ) VLC_FORMAT( 3, 4 );
#define net_Printf(o,fd,...) net_Printf(VLC_OBJECT(o),fd, __VA_ARGS__)
VLC_API ssize_t net_vaPrintf( vlc_object_t *p_this, int fd, const char *psz_fmt, va_list args );
#define net_vaPrintf(a,b,c,d) net_vaPrintf(VLC_OBJECT(a),b,c,d)
#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 __OS2__
# define SHUT_RD 0
# define SHUT_WR 1
# define SHUT_RDWR 2
# 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 AI_NUMERICSERV
# define AI_NUMERICSERV 0
#endif
#ifndef AI_IDN
# define AI_IDN 0 /* GNU/libc extension */
#endif
#ifdef _WIN32
# undef gai_strerror
# define gai_strerror gai_strerrorA
#endif
#ifdef __OS2__
# ifndef NI_NUMERICHOST
# define NI_NUMERICHOST 0x01
# define NI_NUMERICSERV 0x02
# define NI_NOFQDN 0x04
# define NI_NAMEREQD 0x08
# define NI_DGRAM 0x10
# endif
# define AI_PASSIVE 1
# define AI_CANONNAME 2
# define AI_NUMERICHOST 4
VLC_API const char *gai_strerror( int errnum );
VLC_API int getaddrinfo ( const char *, const char *,
const struct addrinfo *, struct addrinfo ** );
VLC_API void freeaddrinfo( struct addrinfo * );
VLC_API int getnameinfo ( const struct sockaddr *, socklen_t,
char *, int, char *, int, int );
#endif
VLC_API int vlc_getnameinfo( const struct sockaddr *, int, char *, int, int *, int );
VLC_API int vlc_getaddrinfo (const char *, unsigned,
const struct addrinfo *, struct addrinfo **);
#ifdef __OS2__
/* OS/2 does not support IPv6, yet. But declare these only for compilation */
struct in6_addr
{
uint8_t s6_addr[16];
};
struct sockaddr_in6
{
uint8_t sin6_len;
uint8_t sin6_family;
uint16_t sin6_port;
uint32_t sin6_flowinfo;
struct in6_addr sin6_addr;
uint32_t sin6_scope_id;
};
# define IN6_IS_ADDR_MULTICAST(a) (((__const uint8_t *) (a))[0] == 0xff)
static const struct in6_addr in6addr_any =
{ { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } };
#endif
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;
}
}
VLC_API char *vlc_getProxyUrl(const char *);
# ifdef __cplusplus
}
# endif
#endif
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