1 /*****************************************************************************
3 *****************************************************************************
4 * Copyright (C) 2004-2006 the VideoLAN team
5 * Copyright © 2006 Rémi Denis-Courmont
9 * Authors: Laurent Aimar <fenrir@videolan.org>
10 * Rémi Denis-Courmont <rem # videolan.org>
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
25 *****************************************************************************/
27 /*****************************************************************************
29 *****************************************************************************/
35 #ifdef HAVE_SYS_TIME_H
36 # include <sys/time.h>
42 # if defined(UNDER_CE)
43 # undef IP_MULTICAST_TTL
44 # define IP_MULTICAST_TTL 3
45 # undef IP_ADD_MEMBERSHIP
46 # define IP_ADD_MEMBERSHIP 5
48 # define EAFNOSUPPORT WSAEAFNOSUPPORT
49 # define if_nametoindex( str ) atoi( str )
58 # define SOL_IP IPPROTO_IP
61 # define SOL_IPV6 IPPROTO_IPV6
64 # define IPPROTO_IPV6 41
67 extern int net_Socket( vlc_object_t *p_this, int i_family, int i_socktype,
71 static int net_SetMcastHopLimit( vlc_object_t *p_this,
72 int fd, int family, int hlim )
77 /* There is some confusion in the world whether IP_MULTICAST_TTL
78 * takes a byte or an int as an argument.
79 * BSD seems to indicate byte so we are going with that and use
80 * int as a fallback to be safe */
85 cmd = IP_MULTICAST_TTL;
88 #ifdef IPV6_MULTICAST_HOPS
91 cmd = IPV6_MULTICAST_HOPS;
96 msg_Warn( p_this, "%s", strerror( EAFNOSUPPORT ) );
100 if( setsockopt( fd, proto, cmd, &hlim, sizeof( hlim ) ) < 0 )
102 /* BSD compatibility */
105 buf = (unsigned char)(( hlim > 255 ) ? 255 : hlim);
106 if( setsockopt( fd, proto, cmd, &buf, sizeof( buf ) ) )
114 static int net_SetMcastIface( vlc_object_t *p_this,
115 int fd, int family, const char *str )
124 if( inet_pton( AF_INET, str, &addr) <= 0 )
126 msg_Err( p_this, "Invalid multicast interface %s", str );
130 if( setsockopt( fd, SOL_IP, IP_MULTICAST_IF, &addr,
131 sizeof( addr ) ) < 0 )
133 msg_Err( p_this, "Cannot use %s as multicast interface: %s",
134 str, strerror(errno) );
139 #endif /* SYS_BEOS */
141 #ifdef IPV6_MULTICAST_IF
144 int scope = if_nametoindex( str );
148 msg_Err( p_this, "Invalid multicast interface %s", str );
152 if( setsockopt( fd, SOL_IPV6, IPV6_MULTICAST_IF,
153 &scope, sizeof( scope ) ) < 0 )
155 msg_Err( p_this, "Cannot use %s as multicast interface: %s",
156 str, strerror( errno ) );
164 msg_Warn( p_this, "%s", strerror( EAFNOSUPPORT ) );
172 int net_SetDSCP( int fd, uint8_t dscp )
174 struct sockaddr_storage addr;
175 if( getsockname( fd, (struct sockaddr *)&addr, &(socklen_t){ sizeof (addr) }) )
180 switch( addr.ss_family )
201 return setsockopt( fd, level, cmd, &(int){ dscp }, sizeof (int));
205 /*****************************************************************************
207 *****************************************************************************
208 * Open a UDP socket to send data to a defined destination, with an optional
210 *****************************************************************************/
211 int __net_ConnectUDP( vlc_object_t *p_this, const char *psz_host, int i_port,
214 struct addrinfo hints, *res, *ptr;
215 int i_val, i_handle = -1;
216 vlc_bool_t b_unreach = VLC_FALSE;
219 i_port = 1234; /* historical VLC thing */
222 i_hlim = var_CreateGetInteger( p_this, "ttl" );
224 memset( &hints, 0, sizeof( hints ) );
225 hints.ai_socktype = SOCK_DGRAM;
227 msg_Dbg( p_this, "net: connecting to %s port %d", psz_host, i_port );
229 i_val = vlc_getaddrinfo( p_this, psz_host, i_port, &hints, &res );
232 msg_Err( p_this, "cannot resolve %s port %d : %s", psz_host, i_port,
233 vlc_gai_strerror( i_val ) );
237 for( ptr = res; ptr != NULL; ptr = ptr->ai_next )
242 fd = net_Socket( p_this, ptr->ai_family, ptr->ai_socktype,
246 #if !defined( SYS_BEOS )
251 /* Increase the receive buffer size to 1/2MB (8Mb/s during 1/2s)
252 * to avoid packet loss caused by scheduling problems */
254 setsockopt( fd, SOL_SOCKET, SO_RCVBUF, (void *)&i_val,
257 setsockopt( fd, SOL_SOCKET, SO_SNDBUF, (void *)&i_val,
260 /* Allow broadcast sending */
262 setsockopt( fd, SOL_SOCKET, SO_BROADCAST, (void*)&i_val,
268 net_SetMcastHopLimit( p_this, fd, ptr->ai_family, i_hlim );
269 psz_mif = config_GetPsz( p_this, (ptr->ai_family != AF_INET)
270 ? "miface" : "miface-addr" );
271 if( psz_mif != NULL )
273 net_SetMcastIface( p_this, fd, ptr->ai_family, psz_mif );
277 if( connect( fd, ptr->ai_addr, ptr->ai_addrlen ) == 0 )
284 #if defined( WIN32 ) || defined( UNDER_CE )
285 if( WSAGetLastError () == WSAENETUNREACH )
287 if( errno == ENETUNREACH )
289 b_unreach = VLC_TRUE;
292 msg_Warn( p_this, "%s port %d : %s", psz_host, i_port,
299 vlc_freeaddrinfo( res );
304 msg_Err( p_this, "Host %s port %d is unreachable", psz_host,
312 /*****************************************************************************
314 *****************************************************************************
315 * Open a UDP connection and return a handle
316 *****************************************************************************/
317 int __net_OpenUDP( vlc_object_t *p_this, const char *psz_bind, int i_bind,
318 const char *psz_server, int i_server )
322 network_socket_t sock;
323 module_t *p_network = NULL;
325 /* if( ( psz_server != NULL ) && ( psz_server[0] == '\0' ) )
326 msg_Warn( p_this, "calling net_OpenUDP with an explicit destination "
327 "is obsolete - use net_ConnectUDP instead" );
329 msg_Warn( p_this, "calling net_OpenUDP with an explicit destination "
330 "port is obsolete - use __net_ConnectUDP instead" );*/
332 if( psz_server == NULL ) psz_server = "";
333 if( psz_bind == NULL ) psz_bind = "";
335 /* Prepare the network_socket_t structure */
336 sock.psz_bind_addr = psz_bind;
337 sock.i_bind_port = i_bind;
338 sock.psz_server_addr = psz_server;
339 sock.i_server_port = i_server;
344 msg_Dbg( p_this, "net: connecting to '[%s]:%d@[%s]:%d'",
345 psz_server, i_server, psz_bind, i_bind );
347 /* Check if we have force ipv4 or ipv6 */
348 var_Create( p_this, "ipv4", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
349 var_Get( p_this, "ipv4", &v4 );
350 var_Create( p_this, "ipv6", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
351 var_Get( p_this, "ipv6", &v6 );
358 /* try IPv6 first (unless IPv4 forced) */
359 private = p_this->p_private;
360 p_this->p_private = (void*)&sock;
361 p_network = module_Need( p_this, "network", "ipv6", VLC_TRUE );
363 if( p_network != NULL )
364 module_Unneed( p_this, p_network );
366 p_this->p_private = private;
369 * Check if the IP stack can receive IPv4 packets on IPv6 sockets.
370 * If yes, then it is better to use the IPv6 socket.
371 * Otherwise, if we also get an IPv4, we have to choose, so we use
374 if( ( sock.i_handle != -1 ) && ( ( sock.v6only == 0 ) || v6.b_bool ) )
375 return sock.i_handle;
380 int fd6 = sock.i_handle;
382 /* also try IPv4 (unless IPv6 forced) */
383 private = p_this->p_private;
384 p_this->p_private = (void*)&sock;
385 p_network = module_Need( p_this, "network", "ipv4", VLC_TRUE );
387 if( p_network != NULL )
388 module_Unneed( p_this, p_network );
390 p_this->p_private = private;
394 if( sock.i_handle != -1 )
396 msg_Warn( p_this, "net: lame IPv6/IPv4 dual-stack present, "
397 "using only IPv4." );
405 if( sock.i_handle == -1 )
406 msg_Dbg( p_this, "net: connection to '[%s]:%d@[%s]:%d' failed",
407 psz_server, i_server, psz_bind, i_bind );
409 return sock.i_handle;