/***************************************************************************** * 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. *****************************************************************************/ #if !defined( __LIBVLC__ ) #error You are not libvlc or one of its plugins. You cannot include this file #endif #ifndef __VLC_NETWORK_H # define __VLC_NETWORK_H #if defined( WIN32 ) # if defined(UNDER_CE) && defined(sockaddr_storage) # undef sockaddr_storage # endif # if defined(UNDER_CE) # define HAVE_STRUCT_ADDRINFO # else # 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 ); # ifndef IPV6_V6ONLY # define IPV6_V6ONLY 27 # endif #else # if HAVE_SYS_SOCKET_H # include <sys/socket.h> # endif # if HAVE_NETINET_IN_H # include <netinet/in.h> # endif # if HAVE_ARPA_INET_H # include <arpa/inet.h> # elif defined( SYS_BEOS ) # include <net/netdb.h> # endif # include <netdb.h> # define net_errno errno # define net_strerror strerror #endif # ifdef __cplusplus extern "C" { # endif /* Portable networking layer communication */ int net_Socket (vlc_object_t *obj, int family, int socktype, int proto); int net_SetupSocket (int fd); #define net_Connect(a, b, c, d, e) __net_Connect(VLC_OBJECT(a), b, c, d, e) VLC_EXPORT( int, __net_Connect, (vlc_object_t *p_this, const char *psz_host, int i_port, int socktype, int protocol) ); VLC_EXPORT( int *, net_Listen, (vlc_object_t *p_this, const char *psz_host, int i_port, int family, int socktype, int protocol) ); #define net_ListenTCP(a, b, c) __net_ListenTCP(VLC_OBJECT(a), b, c) #define net_ConnectTCP(a, b, c) __net_ConnectTCP(VLC_OBJECT(a), b, c) static inline int *__net_ListenTCP (vlc_object_t *obj, const char *host, int port) { return net_Listen (obj, host, port, AF_UNSPEC, 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_Accept(a, b, c) __net_Accept(VLC_OBJECT(a), b, c) VLC_EXPORT( int, __net_Accept, ( vlc_object_t *, int *, mtime_t ) ); #define net_ConnectDgram(a, b, c, d, e ) __net_ConnectDgram(VLC_OBJECT(a), b, c, d, e) VLC_EXPORT( int, __net_ConnectDgram, ( vlc_object_t *p_this, const char *psz_host, int i_port, int hlim, int proto ) ); 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); } #define net_OpenDgram( a, b, c, d, e, g, h ) __net_OpenDgram(VLC_OBJECT(a), b, c, d, e, g, h) 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 ) ); 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 ); }; #define net_Read(a,b,c,d,e,f) __net_Read(VLC_OBJECT(a),b,c,d,e,f) VLC_EXPORT( ssize_t, __net_Read, ( vlc_object_t *p_this, int fd, const v_socket_t *, uint8_t *p_data, size_t i_data, vlc_bool_t b_retry ) ); #define net_Select(a,b,c,d,e) __net_Select(VLC_OBJECT(a),b,c,d,e) VLC_EXPORT( ssize_t, __net_Select, ( vlc_object_t *p_this, const int *pi_fd, int i_fd, uint8_t *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( ssize_t, __net_Write, ( vlc_object_t *p_this, int fd, const v_socket_t *, const uint8_t *p_data, size_t i_data ) ); #define net_Gets(a,b,c) __net_Gets(VLC_OBJECT(a),b,c) VLC_EXPORT( char *, __net_Gets, ( vlc_object_t *p_this, int fd, const v_socket_t * ) ); VLC_EXPORT( ssize_t, net_Printf, ( vlc_object_t *p_this, int fd, const v_socket_t *, const char *psz_fmt, ... ) ATTRIBUTE_FORMAT( 4, 5 ) ); #define net_vaPrintf(a,b,c,d,e) __net_vaPrintf(VLC_OBJECT(a),b,c,d,e) VLC_EXPORT( ssize_t, __net_vaPrintf, ( vlc_object_t *p_this, int fd, const v_socket_t *, const char *psz_fmt, va_list args ) ); #ifndef HAVE_INET_PTON /* only in core, so no need for C++ extern "C" */ VLC_EXPORT (int, inet_pton, (int af, const char *src, void *dst) ); #endif #ifndef HAVE_INET_NTOP #ifdef WIN32 /* only in core, so no need for C++ extern "C" */ VLC_EXPORT (const char *, inet_ntop, (int af, const void *src, char *dst, socklen_t cnt) ); #endif #endif #ifndef HAVE_POLL enum { POLLIN=1, POLLOUT=2, POLLPRI=4, POLLERR=8, // unsupported stub POLLHUP=16, // unsupported stub POLLNVAL=32 // unsupported stub }; struct pollfd { int fd; int events; int revents; }; int poll (struct pollfd *fds, unsigned nfds, int timeout); #endif #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 */ 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 vlc_bool_t 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 VLC_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 VLC_FALSE; return IN6_IS_ADDR_MULTICAST (&v6->sin6_addr) != 0; } #endif } return VLC_FALSE; } /** * net_AddressIsMulticast * @return VLC_FALSE iff the psz_addr does not specify a multicast address, * or the address is not a valid address. */ static inline vlc_bool_t net_AddressIsMulticast( vlc_object_t *p_object, const char *psz_addr ) { struct addrinfo hints, *res; memset (&hints, 0, sizeof (hints)); hints.ai_socktype = SOCK_DGRAM; /* UDP */ hints.ai_flags = AI_NUMERICHOST; int i = vlc_getaddrinfo (p_object, psz_addr, 0, &hints, &res); if (i) { msg_Err (p_object, "invalid address \"%s\" for net_AddressIsMulticast (%s)", psz_addr, vlc_gai_strerror (i)); return VLC_FALSE; } vlc_bool_t b = net_SockAddrIsMulticast (res->ai_addr, res->ai_addrlen); vlc_freeaddrinfo (res); return b; } 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