* udp.c:
*****************************************************************************
* Copyright (C) 2004-2006 the VideoLAN team
- * Copyright © 2006 Rémi Denis-Courmont
+ * Copyright © 2006-2007 Rémi Denis-Courmont
*
* $Id$
*
/*****************************************************************************
* Preamble
*****************************************************************************/
-#include <stdlib.h>
#include <vlc/vlc.h>
#include <errno.h>
# include <sys/time.h>
#endif
-#include "network.h"
+#include <vlc_network.h>
#ifdef WIN32
# if defined(UNDER_CE)
# define SOL_IPV6 IPPROTO_IPV6
#endif
#ifndef IPPROTO_IPV6
-# define IPPROTO_IPV6 41
+# define IPPROTO_IPV6 41 /* IANA */
+#endif
+#ifndef SOL_DCCP
+# define SOL_DCCP IPPROTO_DCCP
+#endif
+#ifndef IPPROTO_DCCP
+# define IPPROTO_DCCP 33 /* IANA */
+#endif
+#ifndef SOL_UDPLITE
+# define SOL_UDPLITE IPPROTO_UDPLITE
+#endif
+#ifndef IPPROTO_UDPLITE
+# define IPPROTO_UDPLITE 136 /* IANA */
+#endif
+
+#ifdef __linux__
+# include <linux/dccp.h>
+# ifndef SOCK_DCCP /* provisional API */
+# define SOCK_DCCP 6
+# endif
+#endif
+
+#if defined (HAVE_NETINET_UDPLITE_H)
+# include <netinet/udplite.h>
+#elif defined (__linux__)
+/* still missing from glibc 2.6 */
+# define UDPLITE_SEND_CSCOV 10
+# define UDPLITE_RECV_CSCOV 11
#endif
extern int net_Socket( vlc_object_t *p_this, int i_family, int i_socktype,
int i_protocol );
+static int net_ListenSingle (vlc_object_t *obj, const char *host, int port,
+ int family, int protocol)
+{
+ struct addrinfo hints, *res;
+
+ memset (&hints, 0, sizeof( hints ));
+ hints.ai_family = family;
+ hints.ai_socktype = SOCK_DGRAM;
+ hints.ai_flags = AI_PASSIVE;
+
+ if (host && !*host)
+ host = NULL;
+
+ msg_Dbg (obj, "net: opening %s datagram port %d", host ?: "any", port);
+
+ int val = vlc_getaddrinfo (obj, host, port, &hints, &res);
+ if (val)
+ {
+ msg_Err (obj, "Cannot resolve %s port %d : %s", host, port,
+ vlc_gai_strerror (val));
+ return -1;
+ }
+
+ val = -1;
+
+ for (const struct addrinfo *ptr = res; ptr != NULL; ptr = ptr->ai_next)
+ {
+ int fd = net_Socket (obj, ptr->ai_family, ptr->ai_socktype,
+ protocol ?: ptr->ai_protocol);
+ if (fd == -1)
+ {
+ msg_Dbg (obj, "socket error: %s", net_strerror (net_errno));
+ continue;
+ }
+
+ if (ptr->ai_next != NULL)
+ {
+#ifdef IPV6_V6ONLY
+ if ((ptr->ai_family != AF_INET6)
+ || setsockopt (fd, SOL_IPV6, IPV6_V6ONLY, &(int){ 0 },
+ sizeof (int)))
+#endif
+ {
+ msg_Err (obj, "Multiple network protocols present");
+ msg_Err (obj, "Please select network protocol manually");
+ }
+ }
+
+ /* Bind the socket */
+#if defined (WIN32) || defined (UNDER_CE)
+ if (net_SockAddrIsMulticast (ptr->ai_addr, ptr->ai_addrlen)
+ && (sizeof (struct sockaddr_storage) >= ptr->ai_addrlen))
+ {
+ struct sockaddr_in6 dumb =
+ {
+ .sin6_family = ptr->ai_addr->sa_family,
+ .sin6_port = ((struct sockaddr_in *)(ptr->ai_addr))->sin_port
+ };
+ bind (fd, (struct sockaddr *)&dumb, ptr->ai_addrlen);
+ }
+ else
+#endif
+ if (bind (fd, ptr->ai_addr, ptr->ai_addrlen))
+ {
+ msg_Err (obj, "socket bind error (%s)", net_strerror (net_errno));
+ net_Close (fd);
+ continue;
+ }
+
+ if (net_SockAddrIsMulticast (ptr->ai_addr, ptr->ai_addrlen)
+ && net_Subscribe (obj, fd, ptr->ai_addr, ptr->ai_addrlen))
+ {
+ net_Close (fd);
+ continue;
+ }
+
+ val = fd;
+ break;
+ }
+
+ vlc_freeaddrinfo (res);
+ return val;
+}
+
static int net_SetMcastHopLimit( vlc_object_t *p_this,
int fd, int family, int hlim )
{
-#ifndef SYS_BEOS
int proto, cmd;
- /* There is some confusion in the world whether IP_MULTICAST_TTL
+ /* There is some confusion in the world whether IP_MULTICAST_TTL
* takes a byte or an int as an argument.
* BSD seems to indicate byte so we are going with that and use
* int as a fallback to be safe */
switch( family )
{
+#ifdef IP_MULTICAST_TTL
case AF_INET:
proto = SOL_IP;
cmd = IP_MULTICAST_TTL;
break;
+#endif
#ifdef IPV6_MULTICAST_HOPS
case AF_INET6:
if( setsockopt( fd, proto, cmd, &buf, sizeof( buf ) ) )
return VLC_EGENERIC;
}
-#endif
+
return VLC_SUCCESS;
}
-static int net_SetMcastIface( vlc_object_t *p_this,
- int fd, int family, const char *str )
+static int net_SetMcastOutIface (int fd, int family, int scope)
{
- switch( family )
+ switch (family)
{
-#ifndef SYS_BEOS
+#ifdef IPV6_MULTICAST_IF
+ case AF_INET6:
+ return setsockopt (fd, SOL_IPV6, IPV6_MULTICAST_IF,
+ &scope, sizeof (scope));
+#endif
+
+#ifdef __linux__
case AF_INET:
{
- struct in_addr addr;
+ struct ip_mreqn req = { .imr_ifindex = scope };
- if( inet_pton( AF_INET, str, &addr) <= 0 )
- {
- msg_Err( p_this, "Invalid multicast interface %s", str );
- return VLC_EGENERIC;
- }
+ return setsockopt (fd, SOL_IP, IP_MULTICAST_IF, &req,
+ sizeof (req));
+ }
+#endif
+ }
+
+ errno = EAFNOSUPPORT;
+ return -1;
+}
- if( setsockopt( fd, SOL_IP, IP_MULTICAST_IF, &addr,
- sizeof( addr ) ) < 0 )
+
+static inline int net_SetMcastOutIPv4 (int fd, struct in_addr ipv4)
+{
+#ifdef IP_MULTICAST_IF
+ return setsockopt( fd, SOL_IP, IP_MULTICAST_IF, &ipv4, sizeof (ipv4));
+#else
+ errno = EAFNOSUPPORT;
+ return -1;
+#endif
+}
+
+
+static int net_SetMcastOut (vlc_object_t *p_this, int fd, int family,
+ const char *iface, const char *addr)
+{
+ if (iface != NULL)
+ {
+ int scope = if_nametoindex (iface);
+ if (scope == 0)
+ {
+ msg_Err (p_this, "invalid multicast interface: %s", iface);
+ return -1;
+ }
+
+ if (net_SetMcastOutIface (fd, family, scope) == 0)
+ return 0;
+
+ msg_Err (p_this, "%s: %s", iface, net_strerror (net_errno));
+ }
+
+ if (addr != NULL)
+ {
+ if (family == AF_INET)
+ {
+ struct in_addr ipv4;
+ if (inet_pton (AF_INET, addr, &ipv4) <= 0)
{
- msg_Err( p_this, "Cannot use %s as multicast interface: %s",
- str, strerror(errno) );
- return VLC_EGENERIC;
+ msg_Err (p_this, "invalid IPv4 address for multicast: %s",
+ addr);
+ return -1;
}
- break;
+
+ if (net_SetMcastOutIPv4 (fd, ipv4) == 0)
+ return 0;
+
+ msg_Err (p_this, "%s: %s", addr, net_strerror (net_errno));
}
-#endif /* SYS_BEOS */
+ }
-#ifdef IPV6_MULTICAST_IF
- case AF_INET6:
+ return -1;
+}
+
+
+/**
+ * Old-style any-source multicast join.
+ * In use on Windows XP/2003 and older.
+ */
+static int
+net_IPv4Join (vlc_object_t *obj, int fd,
+ const struct sockaddr_in *src, const struct sockaddr_in *grp)
+{
+#ifdef IP_ADD_MEMBERSHIP
+ union
+ {
+ struct ip_mreq gr4;
+# ifdef IP_ADD_SOURCE_MEMBERSHIP
+ struct ip_mreq_source gsr4;
+# endif
+ } opt;
+ int cmd;
+ struct in_addr id = { .s_addr = INADDR_ANY };
+ socklen_t optlen;
+
+ /* Multicast interface IPv4 address */
+ char *iface = var_CreateGetString (obj, "miface-addr");
+ if (iface != NULL)
+ {
+ if ((*iface)
+ && (inet_pton (AF_INET, iface, &id) <= 0))
{
- int scope = if_nametoindex( str );
+ msg_Err (obj, "invalid multicast interface address %s", iface);
+ free (iface);
+ goto error;
+ }
+ }
- if( scope == 0 )
- {
- msg_Err( p_this, "Invalid multicast interface %s", str );
- return VLC_EGENERIC;
- }
+ memset (&opt, 0, sizeof (opt));
+ if (src != NULL)
+ {
+# ifdef IP_ADD_SOURCE_MEMBERSHIP
+ cmd = IP_ADD_SOURCE_MEMBERSHIP;
+ opt.gsr4.imr_multiaddr = grp->sin_addr;
+ opt.gsr4.imr_sourceaddr = src->sin_addr;
+ opt.gsr4.imr_interface = id;
+ optlen = sizeof (opt.gsr4);
+# else
+ errno = ENOSYS;
+ goto error;
+# endif
+ }
+ else
+ {
+ cmd = IP_ADD_MEMBERSHIP;
+ opt.gr4.imr_multiaddr = grp->sin_addr;
+ opt.gr4.imr_interface = id;
+ optlen = sizeof (opt.gr4);
+ }
+
+ msg_Dbg (obj, "IP_ADD_%sMEMBERSHIP multicast request",
+ (src != NULL) ? "SOURCE_" : "");
+
+ if (setsockopt (fd, SOL_IP, cmd, &opt, optlen) == 0)
+ return 0;
+
+error:
+#endif
+
+ msg_Err (obj, "cannot join IPv4 multicast group (%s)",
+ net_strerror (net_errno));
+ return -1;
+}
+
+
+static int
+net_IPv6Join (vlc_object_t *obj, int fd, const struct sockaddr_in6 *src)
+{
+#ifdef IPV6_JOIN_GROUP
+ struct ipv6_mreq gr6;
+ memset (&gr6, 0, sizeof (gr6));
+ gr6.ipv6mr_interface = src->sin6_scope_id;
+ memcpy (&gr6.ipv6mr_multiaddr, &src->sin6_addr, 16);
+
+ msg_Dbg (obj, "IPV6_JOIN_GROUP multicast request");
+
+ if (!setsockopt (fd, IPPROTO_IPV6, IPV6_JOIN_GROUP, &gr6, sizeof (gr6)))
+ return 0;
+#else
+ errno = ENOSYS;
+#endif
+
+ msg_Err (obj, "cannot join IPv6 any-source multicast group (%s)",
+ net_strerror (net_errno));
+ return -1;
+}
+
+
+#if defined (WIN32) && !defined (MCAST_JOIN_SOURCE_GROUP)
+/*
+ * I hate manual definitions: Error-prone. Portability hell.
+ * Developers shall use UP-TO-DATE compilers. Full point.
+ * If you remove the warning, you remove the whole ifndef.
+ */
+# warning Your C headers are out-of-date. Please update.
+
+# define MCAST_JOIN_GROUP 41
+struct group_req
+{
+ ULONG gr_interface;
+ struct sockaddr_storage gr_group;
+};
+
+# define MCAST_JOIN_SOURCE_GROUP 45 /* from <ws2ipdef.h> */
+struct group_source_req
+{
+ uint32_t gsr_interface;
+ struct sockaddr_storage gsr_group;
+ struct sockaddr_storage gsr_source;
+};
+#endif
- if( setsockopt( fd, SOL_IPV6, IPV6_MULTICAST_IF,
- &scope, sizeof( scope ) ) < 0 )
+/**
+ * IP-agnostic multicast join,
+ * with fallback to old APIs, and fallback from SSM to ASM.
+ */
+static int
+net_SourceSubscribe (vlc_object_t *obj, int fd,
+ const struct sockaddr *src, socklen_t srclen,
+ const struct sockaddr *grp, socklen_t grplen)
+{
+ int level, iid = 0;
+
+ char *iface = var_CreateGetString (obj, "miface");
+ if (iface != NULL)
+ {
+ if (*iface)
+ {
+ iid = if_nametoindex (iface);
+ if (iid == 0)
{
- msg_Err( p_this, "Cannot use %s as multicast interface: %s",
- str, strerror( errno ) );
- return VLC_EGENERIC;
+ msg_Err (obj, "invalid multicast interface: %s", iface);
+ free (iface);
+ return -1;
}
- break;
}
+ free (iface);
+ }
+
+ switch (grp->sa_family)
+ {
+#ifdef AF_INET6
+ case AF_INET6:
+ level = SOL_IPV6;
+ if (((const struct sockaddr_in6 *)grp)->sin6_scope_id)
+ iid = ((const struct sockaddr_in6 *)grp)->sin6_scope_id;
+ break;
#endif
+ case AF_INET:
+ level = SOL_IP;
+ break;
+
default:
- msg_Warn( p_this, "%s", strerror( EAFNOSUPPORT ) );
- return VLC_EGENERIC;
+ errno = EAFNOSUPPORT;
+ return -1;
}
- return VLC_SUCCESS;
+ if (src != NULL)
+ switch (src->sa_family)
+ {
+#ifdef AF_INET6
+ case AF_INET6:
+ if (memcmp (&((const struct sockaddr_in6 *)src)->sin6_addr,
+ &in6addr_any, sizeof (in6addr_any)) == 0)
+ src = NULL;
+ break;
+#endif
+
+ case AF_INET:
+ if (((const struct sockaddr_in *)src)->sin_addr.s_addr
+ == INADDR_ANY)
+ src = NULL;
+ break;
+ }
+
+
+ /* Agnostic ASM/SSM multicast join */
+#ifdef MCAST_JOIN_SOURCE_GROUP
+ union
+ {
+ struct group_req gr;
+ struct group_source_req gsr;
+ } opt;
+ socklen_t optlen;
+
+ memset (&opt, 0, sizeof (opt));
+
+ if (src != NULL)
+ {
+ if ((grplen > sizeof (opt.gsr.gsr_group))
+ || (srclen > sizeof (opt.gsr.gsr_source)))
+ return -1;
+
+ opt.gsr.gsr_interface = iid;
+ memcpy (&opt.gsr.gsr_source, src, srclen);
+ memcpy (&opt.gsr.gsr_group, grp, grplen);
+ optlen = sizeof (opt.gsr);
+ }
+ else
+ {
+ if (grplen > sizeof (opt.gr.gr_group))
+ return -1;
+
+ opt.gr.gr_interface = iid;
+ memcpy (&opt.gr.gr_group, grp, grplen);
+ optlen = sizeof (opt.gr);
+ }
+
+ msg_Dbg (obj, "Multicast %sgroup join request", src ? "source " : "");
+
+ if (setsockopt (fd, level,
+ src ? MCAST_JOIN_SOURCE_GROUP : MCAST_JOIN_GROUP,
+ (void *)&opt, optlen) == 0)
+ return 0;
+#endif
+
+ /* Fallback to IPv-specific APIs */
+ if ((src != NULL) && (src->sa_family != grp->sa_family))
+ return -1;
+
+ switch (grp->sa_family)
+ {
+ case AF_INET:
+ if ((grplen < sizeof (struct sockaddr_in))
+ || ((src != NULL) && (srclen < sizeof (struct sockaddr_in))))
+ return -1;
+
+ if (net_IPv4Join (obj, fd, (const struct sockaddr_in *)src,
+ (const struct sockaddr_in *)grp) == 0)
+ return 0;
+ break;
+
+#ifdef AF_INET6
+ case AF_INET6:
+ if ((grplen < sizeof (struct sockaddr_in6))
+ || ((src != NULL) && (srclen < sizeof (struct sockaddr_in6))))
+ return -1;
+
+ /* IPv6-specific SSM API does not exist. So if we're here
+ * it means IPv6 SSM is not supported on this OS and we
+ * directly fallback to ASM */
+
+ if (net_IPv6Join (obj, fd, (const struct sockaddr_in6 *)grp) == 0)
+ return 0;
+ break;
+#endif
+ }
+
+ msg_Err (obj, "Multicast group join error (%s)",
+ net_strerror (net_errno));
+
+ if (src != NULL)
+ {
+ msg_Warn (obj, "Trying ASM instead of SSM...");
+ return net_Subscribe (obj, fd, grp, grplen);
+ }
+
+ msg_Err (obj, "Multicast not supported");
+ return -1;
+}
+
+
+int net_Subscribe (vlc_object_t *obj, int fd,
+ const struct sockaddr *addr, socklen_t addrlen)
+{
+ return net_SourceSubscribe (obj, fd, NULL, 0, addr, addrlen);
}
-int net_SetDSCP( int fd, uint8_t dscp )
+static int net_SetDSCP( int fd, uint8_t dscp )
{
struct sockaddr_storage addr;
if( getsockname( fd, (struct sockaddr *)&addr, &(socklen_t){ sizeof (addr) }) )
/*****************************************************************************
- * __net_ConnectUDP:
+ * __net_ConnectDgram:
*****************************************************************************
- * Open a UDP socket to send data to a defined destination, with an optional
- * hop limit.
+ * Open a datagram socket to send data to a defined destination, with an
+ * optional hop limit.
*****************************************************************************/
-int __net_ConnectUDP( vlc_object_t *p_this, const char *psz_host, int i_port,
- int i_hlim )
+int __net_ConnectDgram( vlc_object_t *p_this, const char *psz_host, int i_port,
+ int i_hlim, int proto )
{
struct addrinfo hints, *res, *ptr;
int i_val, i_handle = -1;
for( ptr = res; ptr != NULL; ptr = ptr->ai_next )
{
- int fd;
- char *psz_mif;
-
- fd = net_Socket( p_this, ptr->ai_family, ptr->ai_socktype,
- ptr->ai_protocol );
- if( fd == -1 )
+ char *str;
+ int fd = net_Socket (p_this, ptr->ai_family, ptr->ai_socktype,
+ proto ?: ptr->ai_protocol);
+ if (fd == -1)
continue;
+
#if !defined( SYS_BEOS )
- else
- {
- int i_val;
-
- /* Increase the receive buffer size to 1/2MB (8Mb/s during 1/2s)
- * to avoid packet loss caused by scheduling problems */
- i_val = 0x80000;
- setsockopt( fd, SOL_SOCKET, SO_RCVBUF, (void *)&i_val,
- sizeof( i_val ) );
- i_val = 0x80000;
- setsockopt( fd, SOL_SOCKET, SO_SNDBUF, (void *)&i_val,
- sizeof( i_val ) );
-
- /* Allow broadcast sending */
- i_val = 1;
- setsockopt( fd, SOL_SOCKET, SO_BROADCAST, (void*)&i_val,
- sizeof( i_val ) );
- }
+ /* Increase the receive buffer size to 1/2MB (8Mb/s during 1/2s)
+ * to avoid packet loss caused by scheduling problems */
+ setsockopt (fd, SOL_SOCKET, SO_RCVBUF, &(int){ 0x80000 }, sizeof (int));
+ setsockopt (fd, SOL_SOCKET, SO_SNDBUF, &(int){ 0x80000 }, sizeof (int));
+
+ /* Allow broadcast sending */
+ setsockopt (fd, SOL_SOCKET, SO_BROADCAST, &(int){ 1 }, sizeof (int));
#endif
if( i_hlim > 0 )
net_SetMcastHopLimit( p_this, fd, ptr->ai_family, i_hlim );
- psz_mif = config_GetPsz( p_this, (ptr->ai_family != AF_INET)
- ? "miface" : "miface-addr" );
- if( psz_mif != NULL )
+
+ str = var_CreateGetString (p_this, "miface");
+ if (str != NULL)
+ {
+ if (*str)
+ net_SetMcastOut (p_this, fd, ptr->ai_family, str, NULL);
+ free (str);
+ }
+
+ str = var_CreateGetString (p_this, "miface-addr");
+ if (str != NULL)
{
- net_SetMcastIface( p_this, fd, ptr->ai_family, psz_mif );
- free( psz_mif );
+ if (*str)
+ net_SetMcastOut (p_this, fd, ptr->ai_family, NULL, str);
+ free (str);
}
+ net_SetDSCP (fd, var_CreateGetInteger (p_this, "dscp"));
+
if( connect( fd, ptr->ai_addr, ptr->ai_addrlen ) == 0 )
{
/* success */
return i_handle;
}
+
/*****************************************************************************
- * __net_OpenUDP:
+ * __net_OpenDgram:
*****************************************************************************
- * Open a UDP connection and return a handle
+ * OpenDgram a datagram socket and return a handle
*****************************************************************************/
-int __net_OpenUDP( vlc_object_t *p_this, const char *psz_bind, int i_bind,
- const char *psz_server, int i_server )
+int __net_OpenDgram( vlc_object_t *obj, const char *psz_bind, int i_bind,
+ const char *psz_server, int i_server,
+ int family, int protocol )
{
- vlc_value_t v4, v6;
- void *private;
- network_socket_t sock;
- module_t *p_network = NULL;
-
-/* if( ( psz_server != NULL ) && ( psz_server[0] == '\0' ) )
- msg_Warn( p_this, "calling net_OpenUDP with an explicit destination "
- "is obsolete - use net_ConnectUDP instead" );
- if( i_server != 0 )
- msg_Warn( p_this, "calling net_OpenUDP with an explicit destination "
- "port is obsolete - use __net_ConnectUDP instead" );*/
-
- if( psz_server == NULL ) psz_server = "";
- if( psz_bind == NULL ) psz_bind = "";
-
- /* Prepare the network_socket_t structure */
- sock.psz_bind_addr = psz_bind;
- sock.i_bind_port = i_bind;
- sock.psz_server_addr = psz_server;
- sock.i_server_port = i_server;
- sock.i_ttl = 0;
- sock.v6only = 0;
- sock.i_handle = -1;
-
- msg_Dbg( p_this, "net: connecting to '[%s]:%d@[%s]:%d'",
- psz_server, i_server, psz_bind, i_bind );
-
- /* Check if we have force ipv4 or ipv6 */
- var_Create( p_this, "ipv4", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
- var_Get( p_this, "ipv4", &v4 );
- var_Create( p_this, "ipv6", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
- var_Get( p_this, "ipv6", &v6 );
-
- if( !v4.b_bool )
+ if ((psz_server == NULL) || (psz_server[0] == '\0'))
+ return net_ListenSingle (obj, psz_bind, i_bind, family, protocol);
+
+ msg_Dbg (obj, "net: connecting to [%s]:%d from [%s]:%d",
+ psz_server, i_server, psz_bind, i_bind);
+
+ struct addrinfo hints, *loc, *rem;
+ int val;
+
+ memset (&hints, 0, sizeof (hints));
+ hints.ai_family = family;
+ hints.ai_socktype = SOCK_DGRAM;
+
+ val = vlc_getaddrinfo (obj, psz_server, i_server, &hints, &rem);
+ if (val)
{
- if( v6.b_bool )
- sock.v6only = 1;
-
- /* try IPv6 first (unless IPv4 forced) */
- private = p_this->p_private;
- p_this->p_private = (void*)&sock;
- p_network = module_Need( p_this, "network", "ipv6", VLC_TRUE );
-
- if( p_network != NULL )
- module_Unneed( p_this, p_network );
-
- p_this->p_private = private;
-
- /*
- * Check if the IP stack can receive IPv4 packets on IPv6 sockets.
- * If yes, then it is better to use the IPv6 socket.
- * Otherwise, if we also get an IPv4, we have to choose, so we use
- * IPv4 only.
- */
- if( ( sock.i_handle != -1 ) && ( ( sock.v6only == 0 ) || v6.b_bool ) )
- return sock.i_handle;
+ msg_Err (obj, "cannot resolve %s port %d : %s", psz_bind, i_bind,
+ vlc_gai_strerror (val));
+ return -1;
}
- if( !v6.b_bool )
+ hints.ai_flags = AI_PASSIVE;
+ val = vlc_getaddrinfo (obj, psz_bind, i_bind, &hints, &loc);
+ if (val)
{
- int fd6 = sock.i_handle;
+ msg_Err (obj, "cannot resolve %s port %d : %s", psz_bind, i_bind,
+ vlc_gai_strerror (val));
+ vlc_freeaddrinfo (rem);
+ return -1;
+ }
- /* also try IPv4 (unless IPv6 forced) */
- private = p_this->p_private;
- p_this->p_private = (void*)&sock;
- p_network = module_Need( p_this, "network", "ipv4", VLC_TRUE );
+ for (struct addrinfo *ptr = loc; ptr != NULL; ptr = ptr->ai_next)
+ {
+ int fd = net_Socket (obj, ptr->ai_family, ptr->ai_socktype,
+ protocol ?: ptr->ai_protocol);
+ if (fd == -1)
+ continue; // usually, address family not supported
- if( p_network != NULL )
- module_Unneed( p_this, p_network );
+#ifdef SO_REUSEPORT
+ setsockopt (fd, SOL_SOCKET, SO_REUSEPORT, &(int){ 1 }, sizeof (int));
+#endif
- p_this->p_private = private;
+#ifdef SO_RCVBUF
+ /* Increase the receive buffer size to 1/2MB (8Mb/s during 1/2s)
+ * to avoid packet loss caused in case of scheduling hiccups */
+ setsockopt (fd, SOL_SOCKET, SO_RCVBUF,
+ (void *)&(int){ 0x80000 }, sizeof (int));
+ setsockopt (fd, SOL_SOCKET, SO_SNDBUF,
+ (void *)&(int){ 0x80000 }, sizeof (int));
+#endif
+
+#if defined (WIN32) || defined (UNDER_CE)
+ if (net_SockAddrIsMulticast (ptr->ai_addr, ptr->ai_addrlen)
+ && (sizeof (struct sockaddr_storage) >= ptr->ai_addrlen))
+ {
+ // This works for IPv4 too - don't worry!
+ struct sockaddr_in6 dumb =
+ {
+ .sin6_family = ptr->ai_addr->sa_family,
+ .sin6_port = ((struct sockaddr_in *)(ptr->ai_addr))->sin_port
+ };
+
+ bind (fd, (struct sockaddr *)&dumb, ptr->ai_addrlen);
+ }
+ else
+#endif
+ if (bind (fd, ptr->ai_addr, ptr->ai_addrlen))
+ {
+ net_Close (fd);
+ continue;
+ }
- if( fd6 != -1 )
+ val = -1;
+ for (struct addrinfo *ptr2 = rem; ptr2 != NULL; ptr2 = ptr2->ai_next)
{
- if( sock.i_handle != -1 )
+ if ((ptr2->ai_family != ptr->ai_family)
+ || (ptr2->ai_socktype != ptr->ai_socktype)
+ || (ptr2->ai_protocol != ptr->ai_protocol))
+ continue;
+
+ if (net_SockAddrIsMulticast (ptr->ai_addr, ptr->ai_addrlen)
+ ? net_SourceSubscribe (obj, fd,
+ ptr2->ai_addr, ptr2->ai_addrlen,
+ ptr->ai_addr, ptr->ai_addrlen)
+ : connect (fd, ptr2->ai_addr, ptr2->ai_addrlen))
{
- msg_Warn( p_this, "net: lame IPv6/IPv4 dual-stack present, "
- "using only IPv4." );
- net_Close( fd6 );
+ msg_Err (obj, "cannot connect to %s port %d: %s",
+ psz_server, i_server, net_strerror (net_errno));
+ continue;
}
- else
- sock.i_handle = fd6;
+ val = fd;
+ break;
}
+
+ if (val != -1)
+ break;
+
+ close (fd);
}
- if( sock.i_handle == -1 )
- msg_Dbg( p_this, "net: connection to '[%s]:%d@[%s]:%d' failed",
- psz_server, i_server, psz_bind, i_bind );
+ vlc_freeaddrinfo (rem);
+ vlc_freeaddrinfo (loc);
+ return val;
+}
+
+
+/**
+ * net_SetCSCov:
+ * Sets the send and receive checksum coverage of a socket:
+ * @param fd socket
+ * @param sendcov payload coverage of sent packets (bytes), -1 for full
+ * @param recvcov minimum payload coverage of received packets, -1 for full
+ */
+int net_SetCSCov (int fd, int sendcov, int recvcov)
+{
+ int type;
+
+ if (getsockopt (fd, SOL_SOCKET, SO_TYPE,
+ &type, &(socklen_t){ sizeof (type) }))
+ return VLC_EGENERIC;
+
+ switch (type)
+ {
+#ifdef UDPLITE_RECV_CSCOV
+ case SOCK_DGRAM: /* UDP-Lite */
+ if (sendcov == -1)
+ sendcov = 0;
+ else
+ sendcov += 8; /* partial */
+ if (setsockopt (fd, SOL_UDPLITE, UDPLITE_SEND_CSCOV, &sendcov,
+ sizeof (sendcov)))
+ return VLC_EGENERIC;
+
+ if (recvcov == -1)
+ recvcov = 0;
+ else
+ recvcov += 8;
+ if (setsockopt (fd, SOL_UDPLITE, UDPLITE_RECV_CSCOV,
+ &recvcov, sizeof (recvcov)))
+ return VLC_EGENERIC;
+
+ return VLC_SUCCESS;
+#endif
+#ifdef DCCP_SOCKOPT_SEND_CSCOV
+ case SOCK_DCCP: /* DCCP and its ill-named socket type */
+ if ((sendcov == -1) || (sendcov > 56))
+ sendcov = 0;
+ else
+ sendcov = (sendcov + 3) / 4;
+ if (setsockopt (fd, SOL_DCCP, DCCP_SOCKOPT_SEND_CSCOV,
+ &sendcov, sizeof (sendcov)))
+ return VLC_EGENERIC;
+
+ if ((recvcov == -1) || (recvcov > 56))
+ recvcov = 0;
+ else
+ recvcov = (recvcov + 3) / 4;
+ if (setsockopt (fd, SOL_DCCP, DCCP_SOCKOPT_RECV_CSCOV,
+ &recvcov, sizeof (recvcov)))
+ return VLC_EGENERIC;
+
+ return VLC_SUCCESS;
+#endif
+ }
- return sock.i_handle;
+ return VLC_EGENERIC;
}
projects / vlc / blobdiff