1 /*****************************************************************************
2 * network.h: interface to communicate with network plug-ins
3 *****************************************************************************
4 * Copyright (C) 2002-2005 the VideoLAN team
7 * Authors: Christophe Massiot <massiot@via.ecp.fr>
8 * Laurent Aimar <fenrir@via.ecp.fr>
9 * RĂ©mi Denis-Courmont <rem # videolan.org>
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
24 *****************************************************************************/
26 #ifndef __VLC_NETWORK_H
27 # define __VLC_NETWORK_H
30 # if defined(UNDER_CE) && defined(sockaddr_storage)
31 # undef sockaddr_storage
33 # if defined(UNDER_CE)
34 # define HAVE_STRUCT_ADDRINFO
38 # include <winsock2.h>
39 # include <ws2tcpip.h>
40 # define ENETUNREACH WSAENETUNREACH
41 # define net_errno (WSAGetLastError())
42 extern const char *net_strerror( int val );
44 # if HAVE_SYS_SOCKET_H
45 # include <sys/socket.h>
47 # if HAVE_NETINET_IN_H
48 # include <netinet/in.h>
51 # include <arpa/inet.h>
52 # elif defined( SYS_BEOS )
53 # include <net/netdb.h>
56 # define net_errno errno
57 # define net_strerror strerror
64 /*****************************************************************************
65 * network_socket_t: structure passed to a network plug-in to define the
66 * kind of socket we want
67 *****************************************************************************/
68 struct network_socket_t
70 const char *psz_bind_addr;
73 const char *psz_server_addr;
85 /* Portable networking layer communication */
86 int net_Socket (vlc_object_t *obj, int family, int socktype, int proto);
88 #define net_ConnectTCP(a, b, c) __net_ConnectTCP(VLC_OBJECT(a), b, c)
89 #define net_OpenTCP(a, b, c) __net_ConnectTCP(VLC_OBJECT(a), b, c)
90 VLC_EXPORT( int, __net_ConnectTCP, ( vlc_object_t *p_this, const char *psz_host, int i_port ) );
92 int *net_Listen (vlc_object_t *p_this, const char *psz_host, int i_port,
93 int family, int socktype, int protocol);
95 #define net_ListenTCP(a, b, c) __net_ListenTCP(VLC_OBJECT(a), b, c)
96 VLC_EXPORT( int *, __net_ListenTCP, ( vlc_object_t *, const char *, int ) );
98 #define net_Accept(a, b, c) __net_Accept(VLC_OBJECT(a), b, c)
99 VLC_EXPORT( int, __net_Accept, ( vlc_object_t *, int *, mtime_t ) );
101 #define net_ConnectUDP(a, b, c, d ) __net_ConnectUDP(VLC_OBJECT(a), b, c, d)
102 VLC_EXPORT( int, __net_ConnectUDP, ( vlc_object_t *p_this, const char *psz_host, int i_port, int hlim ) );
104 int net_ListenUDP1 (vlc_object_t *obj, const char *host, int port);
106 #define net_OpenUDP(a, b, c, d, e ) __net_OpenUDP(VLC_OBJECT(a), b, c, d, e)
107 VLC_EXPORT( int, __net_OpenUDP, ( vlc_object_t *p_this, const char *psz_bind, int i_bind, const char *psz_server, int i_server ) );
109 VLC_EXPORT( void, net_Close, ( int fd ) );
110 VLC_EXPORT( void, net_ListenClose, ( int *fd ) );
112 VLC_EXPORT( int, net_SetDSCP, ( int fd, uint8_t dscp ) );
113 int net_Subscribe (vlc_object_t *obj, int fd, const struct sockaddr *addr,
116 /* Functions to read from or write to the networking layer */
117 struct virtual_socket_t
120 int (*pf_recv) ( void *, void *, int );
121 int (*pf_send) ( void *, const void *, int );
124 #define net_Read(a,b,c,d,e,f) __net_Read(VLC_OBJECT(a),b,c,d,e,f)
125 VLC_EXPORT( int, __net_Read, ( vlc_object_t *p_this, int fd, const v_socket_t *, uint8_t *p_data, int i_data, vlc_bool_t b_retry ) );
127 #define net_ReadNonBlock(a,b,c,d,e,f) __net_ReadNonBlock(VLC_OBJECT(a),b,c,d,e,f)
128 VLC_EXPORT( int, __net_ReadNonBlock, ( vlc_object_t *p_this, int fd, const v_socket_t *, uint8_t *p_data, int i_data, mtime_t i_wait ) );
130 #define net_Select(a,b,c,d,e,f,g) __net_Select(VLC_OBJECT(a),b,c,d,e,f,g)
131 VLC_EXPORT( int, __net_Select, ( vlc_object_t *p_this, const int *pi_fd, const v_socket_t *const *, int i_fd, uint8_t *p_data, int i_data, mtime_t i_wait ) );
133 #define net_Write(a,b,c,d,e) __net_Write(VLC_OBJECT(a),b,c,d,e)
134 VLC_EXPORT( int, __net_Write, ( vlc_object_t *p_this, int fd, const v_socket_t *, const uint8_t *p_data, int i_data ) );
136 #define net_Gets(a,b,c) __net_Gets(VLC_OBJECT(a),b,c)
137 VLC_EXPORT( char *, __net_Gets, ( vlc_object_t *p_this, int fd, const v_socket_t * ) );
139 VLC_EXPORT( int, net_Printf, ( vlc_object_t *p_this, int fd, const v_socket_t *, const char *psz_fmt, ... ) );
141 #define net_vaPrintf(a,b,c,d,e) __net_vaPrintf(VLC_OBJECT(a),b,c,d,e)
142 VLC_EXPORT( int, __net_vaPrintf, ( vlc_object_t *p_this, int fd, const v_socket_t *, const char *psz_fmt, va_list args ) );
145 #ifndef HAVE_INET_PTON
146 /* only in core, so no need for C++ extern "C" */
147 int inet_pton(int af, const char *src, void *dst);
151 /*****************************************************************************
153 *****************************************************************************
154 * Wrappers for shutdown()
155 *****************************************************************************/
156 #if defined (SHUT_WR)
157 /* the standard way */
158 # define net_StopSend( fd ) (void)shutdown( fd, SHUT_WR )
159 # define net_StopRecv( fd ) (void)shutdown( fd, SHUT_RD )
160 #elif defined (SD_SEND)
161 /* the Microsoft seemingly-purposedly-different-for-the-sake-of-it way */
162 # define net_StopSend( fd ) (void)shutdown( fd, SD_SEND )
163 # define net_StopRecv( fd ) (void)shutdown( fd, SD_RECEIVE )
165 # ifndef SYS_BEOS /* R5 just doesn't have a working shutdown() */
166 # warning FIXME: implement shutdown on your platform!
168 # define net_StopSend( fd ) (void)0
169 # define net_StopRecv( fd ) (void)0
172 /* Portable network names/addresses resolution layer */
174 /* GAI error codes */
175 # ifndef EAI_BADFLAGS
176 # define EAI_BADFLAGS -1
179 # define EAI_NONAME -2
182 # define EAI_AGAIN -3
188 # define EAI_NODATA -5
191 # define EAI_FAMILY -6
193 # ifndef EAI_SOCKTYPE
194 # define EAI_SOCKTYPE -7
197 # define EAI_SERVICE -8
199 # ifndef EAI_ADDRFAMILY
200 # define EAI_ADDRFAMILY -9
203 # define EAI_MEMORY -10
206 # define EAI_SYSTEM -11
211 # define NI_MAXHOST 1025
212 # define NI_MAXSERV 32
214 # define NI_MAXNUMERICHOST 64
216 # ifndef NI_NUMERICHOST
217 # define NI_NUMERICHOST 0x01
218 # define NI_NUMERICSERV 0x02
219 # define NI_NOFQDN 0x04
220 # define NI_NAMEREQD 0x08
221 # define NI_DGRAM 0x10
224 # ifndef HAVE_STRUCT_ADDRINFO
232 struct sockaddr *ai_addr;
234 struct addrinfo *ai_next;
236 # define AI_PASSIVE 1
237 # define AI_CANONNAME 2
238 # define AI_NUMERICHOST 4
239 # endif /* if !HAVE_STRUCT_ADDRINFO */
241 VLC_EXPORT( const char *, vlc_gai_strerror, ( int ) );
242 VLC_EXPORT( int, vlc_getnameinfo, ( const struct sockaddr *, int, char *, int, int *, int ) );
243 VLC_EXPORT( int, vlc_getaddrinfo, ( vlc_object_t *, const char *, int, const struct addrinfo *, struct addrinfo ** ) );
244 VLC_EXPORT( void, vlc_freeaddrinfo, ( struct addrinfo * ) );
247 static inline vlc_bool_t
248 net_SockAddrIsMulticast (const struct sockaddr *addr, socklen_t len)
250 switch (addr->sa_family)
255 struct sockaddr_in *v4 = (struct sockaddr_in *)addr;
256 if (len < sizeof (*v4))
258 return IN_MULTICAST (v4->sin_addr.s_addr) != 0;
262 #ifdef IN6_IS_ADDR_MULTICAST
265 struct sockaddr_in6 *v6 = (struct sockaddr_in6 *)addr;
266 if (len < sizeof (*v6))
268 return IN6_IS_ADDR_MULTICAST (&v6->sin6_addr) != 0;
279 * net_AddressIsMulticast
280 * @return VLC_FALSE iff the psz_addr does not specify a multicast address,
281 * or the address is not a valid address.
283 static inline vlc_bool_t net_AddressIsMulticast( vlc_object_t *p_object, const char *psz_addr )
285 struct addrinfo hints, *res;
287 memset (&hints, 0, sizeof (hints));
288 hints.ai_socktype = SOCK_DGRAM; /* UDP */
289 hints.ai_flags = AI_NUMERICHOST;
291 int i = vlc_getaddrinfo (p_object, psz_addr, 0,
295 msg_Err (p_object, "invalid address \"%s\" for net_AddressIsMulticast (%s)",
296 psz_addr, vlc_gai_strerror (i));
300 vlc_bool_t b = net_SockAddrIsMulticast (res->ai_addr, res->ai_addrlen);
301 vlc_freeaddrinfo (res);
305 static inline int net_GetSockAddress( int fd, char *address, int *port )
307 struct sockaddr_storage addr;
308 socklen_t addrlen = sizeof( addr );
310 return getsockname( fd, (struct sockaddr *)&addr, &addrlen )
311 || vlc_getnameinfo( (struct sockaddr *)&addr, addrlen, address,
312 NI_MAXNUMERICHOST, port, NI_NUMERICHOST )
316 static inline int net_GetPeerAddress( int fd, char *address, int *port )
318 struct sockaddr_storage addr;
319 socklen_t addrlen = sizeof( addr );
321 return getpeername( fd, (struct sockaddr *)&addr, &addrlen )
322 || vlc_getnameinfo( (struct sockaddr *)&addr, addrlen, address,
323 NI_MAXNUMERICHOST, port, NI_NUMERICHOST )