/***************************************************************************** * 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 * Laurent Aimar * Rémi Denis-Courmont * * 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 # include # include # 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 # include # include # include # include # define net_errno errno #endif #if defined( __SYMBIAN32__ ) # undef AF_INET6 # undef IN6_IS_ADDR_MULTICAST # undef IPV6_V6ONLY # undef IPV6_MULTICAST_HOPS # undef IPV6_MULTICAST_IF # undef IPV6_TCLASS # undef IPV6_JOIN_GROUP #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, 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_API 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_API 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_API ssize_t net_Printf( vlc_object_t *p_this, int fd, const v_socket_t *, const char *psz_fmt, ... ) VLC_FORMAT( 4, 5 ); #define net_Printf(o,fd,vs,...) net_Printf(VLC_OBJECT(o),fd,vs, __VA_ARGS__) VLC_API 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) #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 __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 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 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; } } # ifdef __cplusplus } # endif #endif