Commit b7110f8e authored by Rémi Denis-Courmont's avatar Rémi Denis-Courmont

- Port net_OpenUDP to the agnostic network core

- and merge some ASM/SSM code
parent ef705615
......@@ -69,6 +69,11 @@ extern int net_Socket( vlc_object_t *p_this, int i_family, int i_socktype,
int i_protocol );
/*
* 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 )
{
......@@ -158,7 +163,7 @@ static int net_SetMcastOut (vlc_object_t *p_this, int fd, int family,
int scope = if_nametoindex (iface);
if (scope == 0)
{
msg_Err (p_this, "%s: invalid interface for multicast", iface);
msg_Err (p_this, "invalid multicast interface: %s", iface);
return -1;
}
......@@ -175,7 +180,7 @@ static int net_SetMcastOut (vlc_object_t *p_this, int fd, int family,
struct in_addr ipv4;
if (inet_pton (AF_INET, addr, &ipv4) <= 0)
{
msg_Err (p_this, "%s: invalid IPv4 address for multicast",
msg_Err (p_this, "invalid IPv4 address for multicast: %s",
addr);
return -1;
}
......@@ -191,82 +196,265 @@ static int net_SetMcastOut (vlc_object_t *p_this, int fd, int family,
}
int net_Subscribe (vlc_object_t *obj, int fd, const struct sockaddr *addr,
socklen_t addrlen)
/**
* 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)
{
switch (addr->sa_family)
{
#ifdef IP_ADD_MEMBERSHIP
case AF_INET:
union
{
struct ip_mreq gr4;
# ifdef IP_ADD_SOURCE_MEMBERSHIP
struct ip_mreq_source gsr4;
# endif
} opt;
int cmd;
struct in_addr id;
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))
{
const struct sockaddr_in *v4 = (const struct sockaddr_in *)addr;
if (addrlen < sizeof (*v4))
return -1;
msg_Err (obj, "invalid multicast interface address %s", iface);
free (iface);
goto error;
}
}
struct ip_mreq imr;
memset (&imr, 0, sizeof (imr));
memcpy (&imr.imr_multiaddr, &v4->sin_addr, 4);
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;
}
/* FIXME: should use a different option for in and out */
char *iif = var_CreateGetString (obj, "miface-addr");
if (iif != NULL)
{
if ((iif[0] != '\0') &&
(inet_pton (AF_INET, iif, &imr.imr_interface) <= 0))
{
msg_Err (obj, "invalid multicast interface address %s",
iif);
free (iif);
return -1;
}
free (iif);
}
msg_Dbg (obj, "IP_ADD_MEMBERSHIP multicast request");
#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.
if (setsockopt (fd, IPPROTO_IP, IP_ADD_MEMBERSHIP, &imr,
sizeof (imr)))
/* Most (all?) Mingw32 versions in use are yet to pick up Vista stuff */
# 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
/**
* 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)
{
/* Agnostic ASM/SSM multicast join */
#ifdef MCAST_JOIN_SOURCE_GROUP
union
{
struct group_req gr;
struct group_source_req gsr;
} opt;
socklen_t optlen;
int level, iid = 0;
vlc_bool_t ssm = VLC_TRUE;
if (src == NULL)
ssm = VLC_FALSE;
memset (&opt, 0, sizeof (opt));
char *iface = var_CreateGetString (obj, "miface");
if (iface != NULL)
{
if (*iface)
{
iid = if_nametoindex (iface);
if (iid == 0)
{
msg_Err (obj, "cannot join IPv4 multicast group (%s)",
net_strerror (net_errno));
msg_Err (obj, "invalid multicast interface: %s", iface);
free (iface);
return -1;
}
return 0;
}
#endif
free (iface);
}
#ifdef IPV6_JOIN_GROUP
switch (grp->sa_family)
{
case AF_INET6:
{
const struct sockaddr_in6 *v6 = (const struct sockaddr_in6 *)addr;
if (addrlen < sizeof (*v6))
return -1;
level = SOL_IPV6;
if (ssm
&& memcmp (&((const struct sockaddr_in6 *)src)->sin6_addr,
&in6addr_any, sizeof (in6addr_any)) == 0)
ssm = VLC_FALSE;
struct ipv6_mreq imr;
memset (&imr, 0, sizeof (imr));
imr.ipv6mr_interface = v6->sin6_scope_id;
memcpy (&imr.ipv6mr_multiaddr, &v6->sin6_addr, 16);
if (((const struct sockaddr_in6 *)src)->sin6_scope_id)
iid = ((const struct sockaddr_in6 *)src)->sin6_scope_id;
break;
msg_Dbg (obj, "IPV6_JOIN_GROUP multicast request");
case AF_INET:
level = SOL_IP;
if (ssm
&& ((const struct sockaddr_in *)src)->sin_addr.s_addr
== INADDR_ANY)
ssm = VLC_FALSE;
break;
if (setsockopt (fd, IPPROTO_IPV6, IPV6_JOIN_GROUP, &imr,
sizeof (imr)))
{
msg_Err (obj, "cannot join IPv6 multicast group (%s)",
net_strerror (net_errno));
default:
errno = EAFNOSUPPORT;
return -1;
}
if (ssm)
{
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", ssm ? "source " : "");
if (setsockopt (fd, level,
ssm ? MCAST_JOIN_SOURCE_GROUP : MCAST_JOIN_GROUP,
(void *)&opt, optlen) == 0)
return 0;
#endif
/* Fallback to IPv-specific APIs */
if (ssm && (src->sa_family != grp->sa_family))
return -1;
switch (grp->sa_family)
{
case AF_INET:
if ((grplen < sizeof (struct sockaddr_in))
|| (ssm && (srclen < sizeof (struct sockaddr_in))))
return -1;
}
return 0;
}
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))
|| (ssm && (srclen < sizeof (struct sockaddr_in6))))
return -1;
/* We don't provide IPv6-specific SSM at the moment.
* It seems all the OSes with IPv6 SSM have the new API anyway. */
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 (ssm)
{
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 )
{
struct sockaddr_storage addr;
......@@ -412,76 +600,110 @@ int __net_ConnectUDP( vlc_object_t *p_this, const char *psz_host, int i_port,
*****************************************************************************
* Open a UDP connection and return a handle
*****************************************************************************/
int __net_OpenUDP( vlc_object_t *p_this, const char *psz_bind, int i_bind,
int __net_OpenUDP( vlc_object_t *obj, const char *psz_bind, int i_bind,
const char *psz_server, int i_server )
{
void *private;
network_socket_t sock;
module_t *p_network = NULL;
struct addrinfo hints, *loc, *rem;
int val;
msg_Dbg( obj, "net: connecting to '[%s]:%d@[%s]:%d'",
psz_server, i_server, psz_bind, i_bind );
memset (&hints, 0, sizeof (hints));
hints.ai_socktype = SOCK_DGRAM;
hints.ai_protocol = IPPROTO_UDP;
hints.ai_flags = AI_PASSIVE;
if (((psz_server == NULL) || (psz_server[0] == '\0')) && (i_server == 0))
val = vlc_getaddrinfo (obj, psz_server, i_server, &hints, &rem);
if (val)
{
msg_Warn (p_this,
"Obsolete net_OpenUDP with no remote endpoint; "
"Use net_ListenUDP instead");
return net_ListenUDP1 (p_this, psz_bind, i_bind);
msg_Err (obj, "cannot resolve %s port %d : %s", psz_bind, i_bind,
vlc_gai_strerror (val));
return -1;
}
if (((psz_bind == NULL) || (psz_bind[0] == '\0')) && (i_bind == 0))
val = vlc_getaddrinfo (obj, psz_bind, i_bind, &hints, &loc);
if (val)
{
msg_Warn (p_this,
"Obsolete net_OpenUDP with no local endpoint; "
"Use net_ConnectUDP instead");
return net_ConnectUDP (p_this, psz_server, i_server, -1);
msg_Err (obj, "cannot resolve %s port %d : %s", psz_bind, i_bind,
vlc_gai_strerror (val));
vlc_freeaddrinfo (rem);
return -1;
}
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.i_handle = -1;
for (struct addrinfo *ptr = loc; ptr != NULL; ptr = ptr->ai_next)
{
int fd = net_Socket (obj, ptr->ai_family, ptr->ai_socktype,
ptr->ai_protocol);
if (fd == -1)
continue; // usually, address family not supported
msg_Dbg( p_this, "net: connecting to '[%s]:%d@[%s]:%d'",
psz_server, i_server, psz_bind, i_bind );
#ifdef SO_REUSEPORT
setsockopt (fd, SOL_SOCKET, SO_REUSEPORT, &(int){ 1 }, sizeof (int));
#endif
/* Check if we have force ipv4 or ipv6 */
vlc_bool_t v4 = var_CreateGetBool (p_this, "ipv4");
vlc_bool_t v6 = var_CreateGetBool (p_this, "ipv6");
#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( !v4 )
{
/* 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 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
};
if( p_network != NULL )
module_Unneed( p_this, p_network );
bind (fd, (struct sockaddr *)&dumb, ptr->ai_addrlen);
}
else
#endif
if (bind (fd, ptr->ai_addr, ptr->ai_addrlen))
{
net_Close (fd);
continue;
}
p_this->p_private = private;
}
struct addrinfo *ptr2;
for (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 ((sock.i_handle == -1) && !v6)
{
/* 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 );
if (net_SockAddrIsMulticast (ptr->ai_addr, ptr->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;
}
}
if( p_network != NULL )
module_Unneed( p_this, p_network );
if (ptr2 == NULL)
{
msg_Err (obj, "cannot connect to %s port %d: %s",
psz_server, i_server, net_strerror (net_errno));
close (fd);
continue;
}
p_this->p_private = private;
return 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 );
return sock.i_handle;
return -1;
}
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