* 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>
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
-#include <errno.h>
-#include <assert.h>
+#include <vlc_common.h>
-#ifdef HAVE_SYS_TIME_H
-# include <sys/time.h>
-#endif
+#include <errno.h>
#include <vlc_network.h>
# endif
#endif
+#ifdef HAVE_LINUX_DCCP_H
+# include <linux/dccp.h>
+# ifndef SOCK_DCCP /* provisional API */
+# define SOCK_DCCP 6
+# endif
+#endif
+
#ifndef SOL_IP
# define SOL_IP IPPROTO_IP
#endif
# 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
+
+#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_SetupDgramSocket( vlc_object_t *p_obj, int fd, const struct addrinfo *ptr )
+{
+#ifdef SO_REUSEPORT
+ setsockopt (fd, SOL_SOCKET, SO_REUSEPORT, &(int){ 1 }, sizeof (int));
+#endif
+
+#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))
+ {
+ msg_Err( p_obj, "socket bind error (%m)" );
+ net_Close (fd);
+ return -1;
+ }
+ return fd;
+}
+
+/* */
+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_protocol = protocol;
+ hints.ai_flags = AI_PASSIVE;
+
+ if (host && !*host)
+ host = NULL;
+
+ msg_Dbg (obj, "net: opening %s datagram port %d",
+ host ? 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,
+ 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,
+ ptr->ai_protocol);
+ if (fd == -1)
+ {
+ msg_Dbg (obj, "socket error: %m");
+ continue;
+ }
+
+#ifdef IPV6_V6ONLY
+ /* If IPv6 was forced, set IPv6-only mode.
+ * If IPv4 was forced, do nothing extraordinary.
+ * If nothing was forced, try dual-mode IPv6. */
+ if (ptr->ai_family == AF_INET6)
+ {
+ int on = (family == AF_INET6);
+ setsockopt (fd, SOL_IPV6, IPV6_V6ONLY, &on, sizeof (on));
+ }
+ if (ptr->ai_family == AF_INET)
+#endif
+ if (family == AF_UNSPEC && ptr->ai_next != NULL)
+ {
+ msg_Warn (obj, "ambiguous network protocol specification");
+ msg_Warn (obj, "please select IP version explicitly");
+ }
+
+ fd = net_SetupDgramSocket( obj, fd, ptr );
+ if( fd == -1 )
+ 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;
+ }
+
+ freeaddrinfo (res);
+ return val;
+}
-/*
- * XXX: I am too lazy to put all these dual functions in “next generation”
- * network plugins.
- */
static int net_SetMcastHopLimit( vlc_object_t *p_this,
int fd, int family, int hlim )
{
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 */
#endif
default:
- msg_Warn( p_this, "%s", strerror( EAFNOSUPPORT ) );
+ errno = EAFNOSUPPORT;
+ msg_Warn( p_this, "%m" );
return VLC_EGENERIC;
}
/* BSD compatibility */
unsigned char buf;
+ msg_Dbg( p_this, "cannot set hop limit (%d): %m", hlim );
buf = (unsigned char)(( hlim > 255 ) ? 255 : hlim);
if( setsockopt( fd, proto, cmd, &buf, sizeof( buf ) ) )
+ {
+ msg_Err( p_this, "cannot set hop limit (%d): %m", hlim );
return VLC_EGENERIC;
+ }
}
return VLC_SUCCESS;
if (net_SetMcastOutIface (fd, family, scope) == 0)
return 0;
- msg_Err (p_this, "%s: %s", iface, net_strerror (net_errno));
+ msg_Err (p_this, "%s: %m", iface);
}
if (addr != NULL)
if (net_SetMcastOutIPv4 (fd, ipv4) == 0)
return 0;
- msg_Err (p_this, "%s: %s", addr, net_strerror (net_errno));
+ msg_Err (p_this, "%s: %m", addr);
}
}
socklen_t optlen;
/* Multicast interface IPv4 address */
- char *iface = var_CreateGetString (obj, "miface-addr");
- if (iface != NULL)
+ char *iface = var_CreateGetNonEmptyString (obj, "miface-addr");
+ if ((iface != NULL)
+ && (inet_pton (AF_INET, iface, &id) <= 0))
{
- if ((*iface)
- && (inet_pton (AF_INET, iface, &id) <= 0))
- {
- msg_Err (obj, "invalid multicast interface address %s", iface);
- free (iface);
- goto error;
- }
+ msg_Err (obj, "invalid multicast interface address %s", iface);
+ free (iface);
+ goto error;
}
+ free (iface);
memset (&opt, 0, sizeof (opt));
if (src != NULL)
error:
#endif
- msg_Err (obj, "cannot join IPv4 multicast group (%s)",
- net_strerror (net_errno));
+ msg_Err (obj, "cannot join IPv4 multicast group (%m)");
return -1;
}
msg_Dbg (obj, "IPV6_JOIN_GROUP multicast request");
- if (!setsockopt (fd, IPPROTO_IPV6, IPV6_JOIN_GROUP, &gr6, sizeof (gr6)))
+ if (!setsockopt (fd, SOL_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));
+ msg_Err (obj, "cannot join IPv6 any-source multicast group (%m)");
return -1;
}
-#if 0
#if defined (WIN32) && !defined (MCAST_JOIN_SOURCE_GROUP)
/*
* I hate manual definitions: Error-prone. Portability hell.
*/
# warning Your C headers are out-of-date. Please update.
-/* No, I won't guess the layout of these two.
- * No, I don't want another socket protection level type-of obnoxious bug. */
-# error Hmmm? This needs fixing.
-# define MCAST_JOIN_GROUP XXX
+# define MCAST_JOIN_GROUP 41
struct group_req
{
- uint32_t gr_interface; FIXME
- struct sockaddr_storage gr_group; FIXME
+ ULONG gr_interface;
+ struct sockaddr_storage gr_group;
};
-
# define MCAST_JOIN_SOURCE_GROUP 45 /* from <ws2ipdef.h> */
struct group_source_req
{
struct sockaddr_storage gsr_source;
};
#endif
-#endif
/**
* IP-agnostic multicast join,
{
int level, iid = 0;
- char *iface = var_CreateGetString (obj, "miface");
+ char *iface = var_CreateGetNonEmptyString (obj, "miface");
if (iface != NULL)
{
- if (*iface)
+ iid = if_nametoindex (iface);
+ if (iid == 0)
{
- iid = if_nametoindex (iface);
- if (iid == 0)
- {
- msg_Err (obj, "invalid multicast interface: %s", iface);
- free (iface);
- return -1;
- }
+ msg_Err (obj, "invalid multicast interface: %s", iface);
+ free (iface);
+ return -1;
}
free (iface);
}
msg_Dbg (obj, "Multicast %sgroup join request", src ? "source " : "");
- if (setsockopt (fd, level,
+ if (setsockopt (fd, level,
src ? MCAST_JOIN_SOURCE_GROUP : MCAST_JOIN_GROUP,
(void *)&opt, optlen) == 0)
return 0;
#endif
}
- msg_Err (obj, "Multicast group join error (%s)",
- net_strerror (net_errno));
+ msg_Err (obj, "Multicast group join error (%m)");
if (src != NULL)
{
}
-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) }) )
return setsockopt( fd, level, cmd, &(int){ dscp }, sizeof (int));
}
-
+#undef net_ConnectDgram
/*****************************************************************************
- * __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;
- vlc_bool_t b_unreach = VLC_FALSE;
+ bool b_unreach = false;
- if( i_port == 0 )
- i_port = 1234; /* historical VLC thing */
-
- if( i_hlim < 1 )
+ if( i_hlim < 0 )
i_hlim = var_CreateGetInteger( p_this, "ttl" );
memset( &hints, 0, sizeof( hints ) );
hints.ai_socktype = SOCK_DGRAM;
+ hints.ai_protocol = proto;
- msg_Dbg( p_this, "net: connecting to %s port %d", psz_host, i_port );
+ msg_Dbg( p_this, "net: connecting to [%s]:%d", psz_host, i_port );
i_val = vlc_getaddrinfo( p_this, psz_host, i_port, &hints, &res );
if( i_val )
{
- msg_Err( p_this, "cannot resolve %s port %d : %s", psz_host, i_port,
- vlc_gai_strerror( i_val ) );
+ msg_Err( p_this, "cannot resolve [%s]:%d : %s", psz_host, i_port,
+ gai_strerror( i_val ) );
return -1;
}
setsockopt (fd, SOL_SOCKET, SO_BROADCAST, &(int){ 1 }, sizeof (int));
#endif
- if( i_hlim > 0 )
+ if( i_hlim >= 0 )
net_SetMcastHopLimit( p_this, fd, ptr->ai_family, i_hlim );
- str = var_CreateGetString (p_this, "miface");
+ str = var_CreateGetNonEmptyString (p_this, "miface");
if (str != NULL)
{
- if (*str)
- net_SetMcastOut (p_this, fd, ptr->ai_family, str, NULL);
+ net_SetMcastOut (p_this, fd, ptr->ai_family, str, NULL);
free (str);
}
- str = var_CreateGetString (p_this, "miface-addr");
+ str = var_CreateGetNonEmptyString (p_this, "miface-addr");
if (str != NULL)
{
- if (*str)
- net_SetMcastOut (p_this, fd, ptr->ai_family, NULL, str);
+ net_SetMcastOut (p_this, fd, ptr->ai_family, NULL, str);
free (str);
}
#else
if( errno == ENETUNREACH )
#endif
- b_unreach = VLC_TRUE;
+ b_unreach = true;
else
{
- msg_Warn( p_this, "%s port %d : %s", psz_host, i_port,
- strerror( errno ) );
+ msg_Warn( p_this, "%s port %d : %m", psz_host, i_port);
net_Close( fd );
continue;
}
}
- vlc_freeaddrinfo( res );
+ freeaddrinfo( res );
if( i_handle == -1 )
{
return i_handle;
}
-
+#undef net_OpenDgram
/*****************************************************************************
- * __net_OpenDgram:
+ * net_OpenDgram:
*****************************************************************************
* OpenDgram a datagram socket and return a handle
*****************************************************************************/
-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 )
+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 )
{
- struct addrinfo hints, *loc, *rem;
- int val;
+ if ((psz_server == NULL) || (psz_server[0] == '\0'))
+ return net_ListenSingle (obj, psz_bind, i_bind, family, protocol);
- if( !*psz_server )
- return net_ListenSingle (obj, psz_bind, i_bind,
- family, SOCK_DGRAM, protocol);
+ msg_Dbg (obj, "net: connecting to [%s]:%d from [%s]:%d",
+ psz_server, i_server, psz_bind, i_bind);
- 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;
- hints.ai_flags = AI_PASSIVE;
+ hints.ai_protocol = protocol;
val = vlc_getaddrinfo (obj, psz_server, i_server, &hints, &rem);
if (val)
{
msg_Err (obj, "cannot resolve %s port %d : %s", psz_bind, i_bind,
- vlc_gai_strerror (val));
+ gai_strerror (val));
return -1;
}
+ hints.ai_flags = AI_PASSIVE;
val = vlc_getaddrinfo (obj, psz_bind, i_bind, &hints, &loc);
if (val)
{
msg_Err (obj, "cannot resolve %s port %d : %s", psz_bind, i_bind,
- vlc_gai_strerror (val));
- vlc_freeaddrinfo (rem);
+ gai_strerror (val));
+ freeaddrinfo (rem);
return -1;
}
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);
+ ptr->ai_protocol);
if (fd == -1)
continue; // usually, address family not supported
-#ifdef SO_REUSEPORT
- setsockopt (fd, SOL_SOCKET, SO_REUSEPORT, &(int){ 1 }, sizeof (int));
-#endif
-
-#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);
+ fd = net_SetupDgramSocket( obj, fd, ptr );
+ if( fd == -1 )
continue;
- }
- struct addrinfo *ptr2;
- for (ptr2 = rem; ptr2 != NULL; ptr2 = ptr2->ai_next)
+ val = -1;
+ for (struct addrinfo *ptr2 = rem; ptr2 != NULL; ptr2 = ptr2->ai_next)
{
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))
+ 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))
{
- if (net_SourceSubscribe (obj, fd,
- ptr2->ai_addr, ptr2->ai_addrlen,
- ptr->ai_addr, ptr->ai_addrlen) == 0)
- break;
- }
- else
- {
- if (connect (fd, ptr2->ai_addr, ptr2->ai_addrlen) == 0)
- break;
+ msg_Err (obj, "cannot connect to %s port %d: %m",
+ psz_server, i_server);
+ continue;
}
+ val = fd;
+ break;
}
- if (ptr2 == NULL)
- {
- msg_Err (obj, "cannot connect to %s port %d: %s",
- psz_server, i_server, net_strerror (net_errno));
- close (fd);
- continue;
- }
+ if (val != -1)
+ break;
- return fd;
+ net_Close (fd);
}
- return -1;
+ freeaddrinfo (rem);
+ 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
+ }
+#if !defined( UDPLITE_RECV_CSCOV ) && !defined( DCCP_SOCKOPT_SEND_CSCOV )
+ VLC_UNUSED(sendcov);
+ VLC_UNUSED(recvcov);
+#endif
+
+ return VLC_EGENERIC;
}
projects / vlc / blobdiff