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nsiproxy: Implement IPv4 forward enumerate_all. 

Signed-off-by: Huw Davies <huw@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Huw Davies 2021-08-02 09:19:04 +01:00 committed by Alexandre Julliard
parent 4df04dbdd6
commit f1793fd8bc
5 changed files with 487 additions and 0 deletions
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117
dlls/nsi/tests/nsi.c
View File

@ -485,6 +485,121 @@ static void test_ip_unicast( int family )
winetest_pop_context(); winetest_pop_context();
} }
static void test_ip_forward( int family )
{
DWORD rw_sizes[] = { FIELD_OFFSET(struct nsi_ip_forward_rw, unk),
FIELD_OFFSET(struct nsi_ip_forward_rw, unk2), sizeof(struct nsi_ip_forward_rw) };
DWORD dyn_sizes4[] = { sizeof(struct nsi_ipv4_forward_dynamic) - 3 * sizeof(DWORD),
sizeof(struct nsi_ipv4_forward_dynamic) };
DWORD dyn_sizes6[] = { sizeof(struct nsi_ipv6_forward_dynamic) - 3 * sizeof(DWORD),
sizeof(struct nsi_ipv6_forward_dynamic) };
DWORD *dyn_sizes = family == AF_INET ? dyn_sizes4 : dyn_sizes6;
struct nsi_ipv4_forward_key *key_tbl, *key4;
struct nsi_ipv6_forward_key *key6;
struct nsi_ip_forward_rw *rw_tbl, *rw;
struct nsi_ipv4_forward_dynamic *dyn_tbl, *dyn4;
struct nsi_ipv6_forward_dynamic *dyn6;
struct nsi_ip_forward_static *stat_tbl, *stat;
MIB_IPFORWARD_TABLE2 *table;
const NPI_MODULEID *mod = (family == AF_INET) ? &NPI_MS_IPV4_MODULEID : &NPI_MS_IPV6_MODULEID;
DWORD key_size = (family == AF_INET) ? sizeof(*key4) : sizeof(*key6);
DWORD err, count, i, rw_size, dyn_size;
winetest_push_context( family == AF_INET ? "AF_INET" : "AF_INET6" );
for (i = 0; i < ARRAY_SIZE(rw_sizes); i++)
{
err = NsiAllocateAndGetTable( 1, mod, NSI_IP_FORWARD_TABLE, (void **)&key_tbl, key_size,
(void **)&rw_tbl, rw_sizes[i], NULL, 0,
NULL, 0, &count, 0 );
if (!err) break;
}
todo_wine_if (family == AF_INET6)
ok( !err, "got %d\n", err );
if (err) { winetest_pop_context(); return; }
rw_size = rw_sizes[i];
NsiFreeTable( key_tbl, rw_tbl, NULL, NULL );
for (i = 0; i < ARRAY_SIZE(dyn_sizes4); i++)
{
err = NsiAllocateAndGetTable( 1, mod, NSI_IP_FORWARD_TABLE, (void **)&key_tbl, key_size,
(void **)&rw_tbl, rw_size, (void **)&dyn_tbl, dyn_sizes[i],
(void **)&stat_tbl, sizeof(*stat_tbl), &count, 0 );
if (!err) break;
}
ok( !err, "got %d\n", err );
dyn_size = dyn_sizes[i];
err = GetIpForwardTable2( family, &table );
todo_wine
ok( !err, "got %d\n", err );
if (err) { winetest_pop_context(); return; }
ok( table->NumEntries == count, "table entries %d count %d\n", table->NumEntries, count );
for (i = 0; i < count; i++)
{
MIB_IPFORWARD_ROW2 *row = table->Table + i;
rw = (struct nsi_ip_forward_rw *)((BYTE *)rw_tbl + i * rw_size);
stat = stat_tbl + i;
winetest_push_context( "%d", i );
ok( row->DestinationPrefix.Prefix.si_family == family, "mismatch\n" );
if (family == AF_INET)
{
key4 = key_tbl + i;
dyn4 = (struct nsi_ipv4_forward_dynamic *)((BYTE *)dyn_tbl + i * dyn_size);
ok( row->InterfaceLuid.Value == key4->luid.Value, "mismatch\n" );
ok( row->InterfaceLuid.Value == key4->luid2.Value, "mismatch\n" );
ok( row->DestinationPrefix.Prefix.Ipv4.sin_addr.s_addr == key4->prefix.s_addr, "mismatch\n" );
ok( row->DestinationPrefix.Prefix.Ipv4.sin_port == 0, "mismatch\n" );
ok( row->DestinationPrefix.PrefixLength == key4->prefix_len, "mismatch\n" );
ok( row->NextHop.Ipv4.sin_addr.s_addr == key4->next_hop.s_addr, "mismatch\n" );
ok( row->NextHop.Ipv4.sin_port == 0, "mismatch\n" );
ok( row->Age == dyn4->age, "mismatch\n" );
}
else
{
key6 = (struct nsi_ipv6_forward_key *)key_tbl + i;
dyn6 = (struct nsi_ipv6_forward_dynamic *)((BYTE *)dyn_tbl + i * dyn_size);
ok( row->InterfaceLuid.Value == key6->luid.Value, "mismatch\n" );
ok( row->InterfaceLuid.Value == key6->luid2.Value, "mismatch\n" );
ok( !memcmp( &row->DestinationPrefix.Prefix.Ipv6.sin6_addr, &key6->prefix, sizeof(key6->prefix) ),
"mismatch\n" );
ok( row->DestinationPrefix.Prefix.Ipv6.sin6_port == 0, "mismatch\n" );
ok( row->DestinationPrefix.Prefix.Ipv6.sin6_flowinfo == 0, "mismatch\n" );
ok( row->DestinationPrefix.Prefix.Ipv6.sin6_scope_id == 0, "mismatch\n" );
ok( row->DestinationPrefix.PrefixLength == key6->prefix_len, "mismatch\n" );
ok( !memcmp( &row->NextHop.Ipv6.sin6_addr, &key6->next_hop, sizeof(key6->next_hop) ), "mismatch\n" );
ok( row->NextHop.Ipv6.sin6_port == 0, "mismatch\n" );
ok( row->NextHop.Ipv6.sin6_flowinfo == 0, "mismatch\n" );
ok( row->NextHop.Ipv6.sin6_scope_id == 0, "mismatch\n" );
ok( row->Age == dyn6->age, "mismatch\n" );
}
ok( row->InterfaceIndex == stat->if_index, "mismatch\n" );
ok( row->SitePrefixLength == rw->site_prefix_len, "mismatch\n" );
ok( row->ValidLifetime == rw->valid_lifetime, "mismatch\n" );
ok( row->PreferredLifetime == rw->preferred_lifetime, "mismatch\n" );
ok( row->Metric == rw->metric, "mismatch\n" );
ok( row->Protocol == rw->protocol, "mismatch\n" );
ok( row->Loopback == rw->loopback, "mismatch\n" );
ok( row->AutoconfigureAddress == rw->autoconf, "mismatch\n" );
ok( row->Publish == rw->publish, "mismatch\n" );
ok( row->Immortal == rw->immortal, "mismatch\n" );
ok( row->Origin == stat->origin, "mismatch\n" );
winetest_pop_context();
}
FreeMibTable( table );
NsiFreeTable( key_tbl, rw_tbl, dyn_tbl, stat_tbl );
winetest_pop_context();
}
START_TEST( nsi ) START_TEST( nsi )
{ {
test_nsi_api(); test_nsi_api();
@ -494,4 +609,6 @@ START_TEST( nsi )
test_ip_unicast( AF_INET ); test_ip_unicast( AF_INET );
test_ip_unicast( AF_INET6 ); test_ip_unicast( AF_INET6 );
test_ip_forward( AF_INET );
test_ip_forward( AF_INET6 );
} }

268
dlls/nsiproxy.sys/ip.c
View File

@ -25,6 +25,14 @@
#include <sys/socket.h> #include <sys/socket.h>
#endif #endif
#ifdef HAVE_NET_ROUTE_H
#include <net/route.h>
#endif
#ifdef HAVE_SYS_SYSCTL_H
#include <sys/sysctl.h>
#endif
#ifdef HAVE_NETINET_IN_H #ifdef HAVE_NETINET_IN_H
#include <netinet/in.h> #include <netinet/in.h>
#endif #endif
@ -45,6 +53,7 @@
#include "nldef.h" #include "nldef.h"
#include "ifdef.h" #include "ifdef.h"
#include "netiodef.h" #include "netiodef.h"
#include "wine/heap.h"
#include "wine/nsi.h" #include "wine/nsi.h"
#include "wine/debug.h" #include "wine/debug.h"
@ -221,6 +230,249 @@ static NTSTATUS ip_unicast_get_all_parameters( const void *key, DWORD key_size,
return status; return status;
} }
struct ipv4_route_data
{
NET_LUID luid;
DWORD if_index;
struct in_addr prefix;
DWORD prefix_len;
struct in_addr next_hop;
DWORD metric;
DWORD protocol;
BYTE loopback;
};
static void ipv4_forward_fill_entry( struct ipv4_route_data *entry, struct nsi_ipv4_forward_key *key,
struct nsi_ip_forward_rw *rw, struct nsi_ipv4_forward_dynamic *dyn,
struct nsi_ip_forward_static *stat )
{
if (key)
{
key->unk = 0;
key->prefix.WS_s_addr = entry->prefix.s_addr;
key->prefix_len = entry->prefix_len;
memset( key->unk2, 0, sizeof(key->unk2) );
memset( key->unk3, 0, sizeof(key->unk3) );
key->luid = entry->luid;
key->luid2 = entry->luid;
key->next_hop.WS_s_addr = entry->next_hop.s_addr;
key->pad = 0;
}
if (rw)
{
rw->site_prefix_len = 0;
rw->valid_lifetime = ~0u;
rw->preferred_lifetime = ~0u;
rw->metric = entry->metric;
rw->protocol = entry->protocol;
rw->loopback = entry->loopback;
rw->autoconf = 1;
rw->publish = 0;
rw->immortal = 1;
memset( rw->unk, 0, sizeof(rw->unk) );
rw->unk2 = 0;
}
if (dyn)
{
memset( dyn, 0, sizeof(*dyn) );
}
if (stat)
{
stat->origin = NlroManual;
stat->if_index = entry->if_index;
}
}
static NTSTATUS ipv4_forward_enumerate_all( void *key_data, DWORD key_size, void *rw_data, DWORD rw_size,
void *dynamic_data, DWORD dynamic_size,
void *static_data, DWORD static_size, DWORD_PTR *count )
{
DWORD num = 0;
NTSTATUS status = STATUS_SUCCESS;
BOOL want_data = key_size || rw_size || dynamic_size || static_size;
struct ipv4_route_data entry;
TRACE( "%p %d %p %d %p %d %p %d %p\n", key_data, key_size, rw_data, rw_size,
dynamic_data, dynamic_size, static_data, static_size, count );
#ifdef __linux__
{
char buf[512], *ptr;
struct in_addr mask;
DWORD rtf_flags;
FILE *fp;
if (!(fp = fopen( "/proc/net/route", "r" ))) return STATUS_NOT_SUPPORTED;
/* skip header line */
fgets( buf, sizeof(buf), fp );
while ((ptr = fgets( buf, sizeof(buf), fp )))
{
while (!isspace( *ptr )) ptr++;
*ptr++ = '\0';
if (!convert_unix_name_to_luid( buf, &entry.luid )) continue;
if (!convert_luid_to_index( &entry.luid, &entry.if_index )) continue;
entry.prefix.s_addr = strtoul( ptr, &ptr, 16 );
entry.next_hop.s_addr = strtoul( ptr + 1, &ptr, 16 );
rtf_flags = strtoul( ptr + 1, &ptr, 16 );
strtoul( ptr + 1, &ptr, 16 ); /* refcount, skip */
strtoul( ptr + 1, &ptr, 16 ); /* use, skip */
entry.metric = strtoul( ptr + 1, &ptr, 16 );
mask.s_addr = strtoul( ptr + 1, &ptr, 16 );
entry.prefix_len = mask_v4_to_prefix( &mask );
entry.protocol = (rtf_flags & RTF_GATEWAY) ? MIB_IPPROTO_NETMGMT : MIB_IPPROTO_LOCAL;
entry.loopback = entry.protocol == MIB_IPPROTO_LOCAL && entry.prefix_len == 32;
if (num < *count)
{
ipv4_forward_fill_entry( &entry, key_data, rw_data, dynamic_data, static_data );
key_data = (BYTE *)key_data + key_size;
rw_data = (BYTE *)rw_data + rw_size;
dynamic_data = (BYTE *)dynamic_data + dynamic_size;
static_data = (BYTE *)static_data + static_size;
}
num++;
}
fclose( fp );
}
#elif defined(HAVE_SYS_SYSCTL_H) && defined(NET_RT_DUMP)
{
int mib[6] = { CTL_NET, PF_ROUTE, 0, PF_INET, NET_RT_DUMP, 0 };
size_t needed;
char *buf = NULL, *lim, *next, *addr_ptr;
struct rt_msghdr *rtm;
if (sysctl( mib, ARRAY_SIZE(mib), NULL, &needed, NULL, 0 ) < 0) return STATUS_NOT_SUPPORTED;
buf = heap_alloc( needed );
if (!buf) return STATUS_NO_MEMORY;
if (sysctl( mib, 6, buf, &needed, NULL, 0 ) < 0)
{
heap_free( buf );
return STATUS_NOT_SUPPORTED;
}
lim = buf + needed;
for (next = buf; next < lim; next += rtm->rtm_msglen)
{
int i;
sa_family_t dst_family = AF_UNSPEC;
rtm = (struct rt_msghdr *)next;
if (rtm->rtm_type != RTM_GET)
{
WARN( "Got unexpected message type 0x%x!\n", rtm->rtm_type );
continue;
}
/* Ignore gateway routes which are multicast */
if ((rtm->rtm_flags & RTF_GATEWAY) && (rtm->rtm_flags & RTF_MULTICAST)) continue;
entry.if_index = rtm->rtm_index;
if (!convert_index_to_luid( entry.if_index, &entry.luid )) continue;
entry.protocol = (rtm->rtm_flags & RTF_GATEWAY) ? MIB_IPPROTO_NETMGMT : MIB_IPPROTO_LOCAL;
entry.metric = rtm->rtm_rmx.rmx_hopcount;
addr_ptr = (char *)(rtm + 1);
for (i = 1; i; i <<= 1)
{
struct sockaddr *sa;
struct in_addr addr;
if (!(i & rtm->rtm_addrs)) continue;
sa = (struct sockaddr *)addr_ptr;
if (addr_ptr + sa->sa_len > next + rtm->rtm_msglen)
{
ERR( "struct sockaddr extends beyond the route message, %p > %p\n",
addr_ptr + sa->sa_len, next + rtm->rtm_msglen );
}
if (sa->sa_len) addr_ptr += (sa->sa_len + sizeof(int)-1) & ~(sizeof(int)-1);
else addr_ptr += sizeof(int);
/* Apple's netstat prints the netmask together with the destination
* and only looks at the destination's address family. The netmask's
* sa_family sometimes contains the non-existent value 0xff. */
switch (i == RTA_NETMASK ? dst_family : sa->sa_family)
{
case AF_INET:
{
/* Netmasks (and possibly other addresses) have only enough size
* to represent the non-zero bits, e.g. a netmask of 255.0.0.0 has
* 5 bytes (1 sa_len, 1 sa_family, 2 sa_port and 1 for the first
* byte of sin_addr). */
struct sockaddr_in sin = {0};
memcpy( &sin, sa, sa->sa_len );
addr = sin.sin_addr;
break;
}
#ifdef AF_LINK
case AF_LINK:
if (i == RTA_GATEWAY && entry.protocol == MIB_IPPROTO_NETMGMT)
{
/* For direct route we may simply use dest addr as next hop */
C_ASSERT(RTA_DST < RTA_GATEWAY);
addr = entry.prefix;
break;
}
/* fallthrough */
#endif
default:
WARN( "Received unsupported sockaddr family 0x%x\n", sa->sa_family );
addr.s_addr = 0;
}
switch (i)
{
case RTA_DST:
entry.prefix = addr;
dst_family = sa->sa_family;
break;
case RTA_GATEWAY: entry.next_hop = addr; break;
case RTA_NETMASK: entry.prefix_len = mask_v4_to_prefix( &addr ); break;
default:
WARN( "Unexpected address type 0x%x\n", i );
}
}
if (num < *count)
{
ipv4_forward_fill_entry( &entry, key_data, rw_data, dynamic_data, static_data );
key_data = (BYTE *)key_data + key_size;
rw_data = (BYTE *)rw_data + rw_size;
dynamic_data = (BYTE *)dynamic_data + dynamic_size;
static_data = (BYTE *)static_data + static_size;
}
num++;
}
HeapFree( GetProcessHeap (), 0, buf );
}
#else
FIXME( "not implemented\n" );
return STATUS_NOT_IMPLEMENTED;
#endif
if (!want_data || num <= *count) *count = num;
else status = STATUS_MORE_ENTRIES;
return status;
}
static NTSTATUS ipv6_forward_enumerate_all( void *key_data, DWORD key_size, void *rw_data, DWORD rw_size,
void *dynamic_data, DWORD dynamic_size,
void *static_data, DWORD static_size, DWORD_PTR *count )
{
FIXME( "not implemented\n" );
return STATUS_NOT_IMPLEMENTED;
}
static struct module_table ipv4_tables[] = static struct module_table ipv4_tables[] =
{ {
{ {
@ -232,6 +484,14 @@ static struct module_table ipv4_tables[] =
ip_unicast_enumerate_all, ip_unicast_enumerate_all,
ip_unicast_get_all_parameters, ip_unicast_get_all_parameters,
}, },
{
NSI_IP_FORWARD_TABLE,
{
sizeof(struct nsi_ipv4_forward_key), sizeof(struct nsi_ip_forward_rw),
sizeof(struct nsi_ipv4_forward_dynamic), sizeof(struct nsi_ip_forward_static)
},
ipv4_forward_enumerate_all,
},
{ {
~0u ~0u
} }
@ -254,6 +514,14 @@ static struct module_table ipv6_tables[] =
ip_unicast_enumerate_all, ip_unicast_enumerate_all,
ip_unicast_get_all_parameters, ip_unicast_get_all_parameters,
}, },
{
NSI_IP_FORWARD_TABLE,
{
sizeof(struct nsi_ipv6_forward_key), sizeof(struct nsi_ip_forward_rw),
sizeof(struct nsi_ipv6_forward_dynamic), sizeof(struct nsi_ip_forward_static)
},
ipv6_forward_enumerate_all,
},
{ {
~0u ~0u
} }

38
dlls/nsiproxy.sys/nsiproxy_private.h
View File

@ -25,6 +25,44 @@ NTSTATUS nsi_get_parameter_ex( struct nsi_get_parameter_ex *params ) DECLSPEC_HI
BOOL convert_luid_to_unix_name( const NET_LUID *luid, const char **unix_name ) DECLSPEC_HIDDEN; BOOL convert_luid_to_unix_name( const NET_LUID *luid, const char **unix_name ) DECLSPEC_HIDDEN;
BOOL convert_unix_name_to_luid( const char *unix_name, NET_LUID *luid ) DECLSPEC_HIDDEN; BOOL convert_unix_name_to_luid( const char *unix_name, NET_LUID *luid ) DECLSPEC_HIDDEN;
static inline BOOL convert_luid_to_index( const NET_LUID *luid, DWORD *index )
{
struct nsi_get_parameter_ex params;
params.unknown[0] = 0;
params.unknown[1] = 0;
params.first_arg = 1;
params.unknown2 = 0;
params.module = &NPI_MS_NDIS_MODULEID;
params.table = NSI_NDIS_IFINFO_TABLE;
params.key = luid;
params.key_size = sizeof(*luid);
params.param_type = NSI_PARAM_TYPE_STATIC;
params.data = index;
params.data_size = sizeof(*index);
params.data_offset = FIELD_OFFSET(struct nsi_ndis_ifinfo_static, if_index);
return !nsi_get_parameter_ex( &params );
}
static inline BOOL convert_index_to_luid( DWORD index, NET_LUID *luid )
{
struct nsi_get_parameter_ex params;
params.unknown[0] = 0;
params.unknown[1] = 0;
params.first_arg = 1;
params.unknown2 = 0;
params.module = &NPI_MS_NDIS_MODULEID;
params.table = NSI_NDIS_INDEX_LUID_TABLE;
params.key = &index;
params.key_size = sizeof(index);
params.param_type = NSI_PARAM_TYPE_STATIC;
params.data = luid;
params.data_size = sizeof(*luid);
params.data_offset = 0;
return !nsi_get_parameter_ex( &params );
}
struct module_table struct module_table
{ {
DWORD table; DWORD table;

2
include/netioapi.h
View File

@ -254,6 +254,8 @@ DWORD WINAPI GetIfEntry2(MIB_IF_ROW2*);
DWORD WINAPI GetIfEntry2Ex(MIB_IF_TABLE_LEVEL,MIB_IF_ROW2*); DWORD WINAPI GetIfEntry2Ex(MIB_IF_TABLE_LEVEL,MIB_IF_ROW2*);
DWORD WINAPI GetIfTable2(MIB_IF_TABLE2**); DWORD WINAPI GetIfTable2(MIB_IF_TABLE2**);
DWORD WINAPI GetIfTable2Ex(MIB_IF_TABLE_LEVEL,MIB_IF_TABLE2**); DWORD WINAPI GetIfTable2Ex(MIB_IF_TABLE_LEVEL,MIB_IF_TABLE2**);
DWORD WINAPI GetIpForwardEntry2(MIB_IPFORWARD_ROW2*);
DWORD WINAPI GetIpForwardTable2(ADDRESS_FAMILY,MIB_IPFORWARD_TABLE2**);
DWORD WINAPI GetIpInterfaceTable(ADDRESS_FAMILY,MIB_IPINTERFACE_TABLE**); DWORD WINAPI GetIpInterfaceTable(ADDRESS_FAMILY,MIB_IPINTERFACE_TABLE**);
DWORD WINAPI GetUnicastIpAddressEntry(MIB_UNICASTIPADDRESS_ROW*); DWORD WINAPI GetUnicastIpAddressEntry(MIB_UNICASTIPADDRESS_ROW*);
DWORD WINAPI GetUnicastIpAddressTable(ADDRESS_FAMILY,MIB_UNICASTIPADDRESS_TABLE**); DWORD WINAPI GetUnicastIpAddressTable(ADDRESS_FAMILY,MIB_UNICASTIPADDRESS_TABLE**);

62
include/wine/nsi.h
View File

@ -98,6 +98,7 @@ struct nsi_ndis_ifinfo_static
/* Undocumented NSI IP tables */ /* Undocumented NSI IP tables */
#define NSI_IP_UNICAST_TABLE 10 #define NSI_IP_UNICAST_TABLE 10
#define NSI_IP_FORWARD_TABLE 16
struct nsi_ipv4_unicast_key struct nsi_ipv4_unicast_key
{ {
@ -133,6 +134,67 @@ struct nsi_ip_unicast_static
ULONG64 creation_time; ULONG64 creation_time;
}; };
struct nsi_ipv4_forward_key
{
DWORD unk;
IN_ADDR prefix;
BYTE prefix_len;
BYTE unk2[3];
DWORD unk3[3];
NET_LUID luid;
NET_LUID luid2;
IN_ADDR next_hop;
DWORD pad;
};
struct nsi_ipv6_forward_key
{
DWORD unk;
IN6_ADDR prefix;
BYTE prefix_len;
BYTE unk2[3];
DWORD unk3[3];
DWORD pad;
NET_LUID luid;
NET_LUID luid2;
IN6_ADDR next_hop;
};
struct nsi_ip_forward_rw
{
DWORD site_prefix_len;
DWORD valid_lifetime;
DWORD preferred_lifetime;
DWORD metric;
DWORD protocol;
BYTE loopback;
BYTE autoconf;
BYTE publish;
BYTE immortal;
BYTE unk[4];
DWORD unk2;
};
struct nsi_ipv4_forward_dynamic
{
DWORD age;
DWORD unk[3];
IN_ADDR addr2; /* often a repeat of prefix */
};
struct nsi_ipv6_forward_dynamic
{
DWORD age;
DWORD unk[3];
IN6_ADDR addr2; /* often a repeat of prefix */
};
struct nsi_ip_forward_static
{
DWORD origin;
DWORD if_index;
};
/* Wine specific ioctl interface */ /* Wine specific ioctl interface */
#define IOCTL_NSIPROXY_WINE_ENUMERATE_ALL CTL_CODE(FILE_DEVICE_NETWORK, 0x400, METHOD_BUFFERED, 0) #define IOCTL_NSIPROXY_WINE_ENUMERATE_ALL CTL_CODE(FILE_DEVICE_NETWORK, 0x400, METHOD_BUFFERED, 0)