conn: implement RIO for fast Windows UDP sockets

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
This commit is contained in:
Jason A. Donenfeld 2021-02-22 18:47:41 +01:00
parent f9dac7099e
commit 3c11c0308e
9 changed files with 852 additions and 71 deletions

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@ -128,6 +128,8 @@ func (bind *StdNetBind) Close() error {
err2 = bind.ipv6.Close()
bind.ipv6 = nil
}
bind.blackhole4 = false
bind.blackhole6 = false
if err1 != nil {
return err1
}

581
conn/bind_windows.go Normal file
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@ -0,0 +1,581 @@
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
*/
package conn
import (
"encoding/binary"
"io"
"net"
"strconv"
"sync"
"sync/atomic"
"unsafe"
"golang.org/x/sys/windows"
"golang.zx2c4.com/wireguard/conn/winrio"
)
const (
packetsPerRing = 1024
bytesPerPacket = 2048 - 32
receiveSpins = 15
)
type ringPacket struct {
addr WinRingEndpoint
data [bytesPerPacket]byte
}
type ringBuffer struct {
packets uintptr
head, tail uint32
id winrio.BufferId
iocp windows.Handle
isFull bool
cq winrio.Cq
mu sync.Mutex
overlapped windows.Overlapped
}
func (rb *ringBuffer) Push() *ringPacket {
for rb.isFull {
panic("ring is full")
}
ret := (*ringPacket)(unsafe.Pointer(rb.packets + (uintptr(rb.tail%packetsPerRing) * unsafe.Sizeof(ringPacket{}))))
rb.tail += 1
if rb.tail == rb.head {
rb.isFull = true
}
return ret
}
func (rb *ringBuffer) Return(count uint32) {
if rb.head%packetsPerRing == rb.tail%packetsPerRing && !rb.isFull {
return
}
rb.head += count
rb.isFull = false
}
type afWinRingBind struct {
sock windows.Handle
rx, tx ringBuffer
rq winrio.Rq
mu sync.Mutex
blackhole bool
}
// WinRingBind uses Windows registered I/O for fast ring buffered networking.
type WinRingBind struct {
v4, v6 afWinRingBind
mu sync.RWMutex
isOpen uint32
}
func NewDefaultBind() Bind { return NewWinRingBind() }
func NewWinRingBind() Bind {
if !winrio.Initialize() {
return NewStdNetBind()
}
return new(WinRingBind)
}
type WinRingEndpoint struct {
family uint16
data [30]byte
}
var _ Bind = (*WinRingBind)(nil)
var _ Endpoint = (*WinRingEndpoint)(nil)
func (*WinRingBind) ParseEndpoint(s string) (Endpoint, error) {
host, port, err := net.SplitHostPort(s)
if err != nil {
return nil, err
}
host16, err := windows.UTF16PtrFromString(host)
if err != nil {
return nil, err
}
port16, err := windows.UTF16PtrFromString(port)
if err != nil {
return nil, err
}
hints := windows.AddrinfoW{
Flags: windows.AI_NUMERICHOST,
Family: windows.AF_UNSPEC,
Socktype: windows.SOCK_DGRAM,
Protocol: windows.IPPROTO_UDP,
}
var addrinfo *windows.AddrinfoW
err = windows.GetAddrInfoW(host16, port16, &hints, &addrinfo)
if err != nil {
return nil, err
}
defer windows.FreeAddrInfoW(addrinfo)
if (addrinfo.Family != windows.AF_INET && addrinfo.Family != windows.AF_INET6) || addrinfo.Addrlen > unsafe.Sizeof(WinRingEndpoint{}) {
return nil, windows.ERROR_INVALID_ADDRESS
}
var src []byte
var dst [unsafe.Sizeof(WinRingEndpoint{})]byte
unsafeSlice(unsafe.Pointer(&src), unsafe.Pointer(addrinfo.Addr), int(addrinfo.Addrlen))
copy(dst[:], src)
return (*WinRingEndpoint)(unsafe.Pointer(&dst[0])), nil
}
func (*WinRingEndpoint) ClearSrc() {}
func (e *WinRingEndpoint) DstIP() net.IP {
switch e.family {
case windows.AF_INET:
return append([]byte{}, e.data[2:6]...)
case windows.AF_INET6:
return append([]byte{}, e.data[6:22]...)
}
return nil
}
func (e *WinRingEndpoint) SrcIP() net.IP {
return nil // not supported
}
func (e *WinRingEndpoint) DstToBytes() []byte {
switch e.family {
case windows.AF_INET:
b := make([]byte, 0, 6)
b = append(b, e.data[2:6]...)
b = append(b, e.data[1], e.data[0])
return b
case windows.AF_INET6:
b := make([]byte, 0, 18)
b = append(b, e.data[6:22]...)
b = append(b, e.data[1], e.data[0])
return b
}
return nil
}
func (e *WinRingEndpoint) DstToString() string {
switch e.family {
case windows.AF_INET:
addr := net.UDPAddr{IP: e.data[2:6], Port: int(binary.BigEndian.Uint16(e.data[0:2]))}
return addr.String()
case windows.AF_INET6:
var zone string
if scope := *(*uint32)(unsafe.Pointer(&e.data[22])); scope > 0 {
zone = strconv.FormatUint(uint64(scope), 10)
}
addr := net.UDPAddr{IP: e.data[6:22], Zone: zone, Port: int(binary.BigEndian.Uint16(e.data[0:2]))}
return addr.String()
}
return ""
}
func (e *WinRingEndpoint) SrcToString() string {
return ""
}
func (ring *ringBuffer) CloseAndZero() {
if ring.cq != 0 {
winrio.CloseCompletionQueue(ring.cq)
ring.cq = 0
}
if ring.iocp != 0 {
windows.CloseHandle(ring.iocp)
ring.iocp = 0
}
if ring.id != 0 {
winrio.DeregisterBuffer(ring.id)
ring.id = 0
}
if ring.packets != 0 {
windows.VirtualFree(ring.packets, 0, windows.MEM_RELEASE)
ring.packets = 0
}
}
func (bind *afWinRingBind) CloseAndZero() {
bind.rx.CloseAndZero()
bind.tx.CloseAndZero()
if bind.sock != 0 {
windows.CloseHandle(bind.sock)
bind.sock = 0
}
bind.blackhole = false
}
func (bind *WinRingBind) closeAndZero() {
atomic.StoreUint32(&bind.isOpen, 0)
bind.v4.CloseAndZero()
bind.v6.CloseAndZero()
}
func (ring *ringBuffer) Open() error {
var err error
packetsLen := unsafe.Sizeof(ringPacket{}) * packetsPerRing
ring.packets, err = windows.VirtualAlloc(0, packetsLen, windows.MEM_COMMIT|windows.MEM_RESERVE, windows.PAGE_READWRITE)
if err != nil {
return err
}
ring.id, err = winrio.RegisterPointer(unsafe.Pointer(ring.packets), uint32(packetsLen))
if err != nil {
return err
}
ring.iocp, err = windows.CreateIoCompletionPort(windows.InvalidHandle, 0, 0, 0)
if err != nil {
return err
}
ring.cq, err = winrio.CreateIOCPCompletionQueue(packetsPerRing, ring.iocp, 0, &ring.overlapped)
if err != nil {
return err
}
return nil
}
func (bind *afWinRingBind) Open(family int32, sa windows.Sockaddr) (windows.Sockaddr, error) {
var err error
bind.sock, err = winrio.Socket(family, windows.SOCK_DGRAM, windows.IPPROTO_UDP)
if err != nil {
return nil, err
}
err = bind.rx.Open()
if err != nil {
return nil, err
}
err = bind.tx.Open()
if err != nil {
return nil, err
}
bind.rq, err = winrio.CreateRequestQueue(bind.sock, packetsPerRing, 1, packetsPerRing, 1, bind.rx.cq, bind.tx.cq, 0)
if err != nil {
return nil, err
}
err = windows.Bind(bind.sock, sa)
if err != nil {
return nil, err
}
sa, err = windows.Getsockname(bind.sock)
if err != nil {
return nil, err
}
return sa, nil
}
func (bind *WinRingBind) Open(port uint16) (selectedPort uint16, err error) {
bind.mu.Lock()
defer bind.mu.Unlock()
defer func() {
if err != nil {
bind.closeAndZero()
}
}()
if atomic.LoadUint32(&bind.isOpen) != 0 {
return 0, ErrBindAlreadyOpen
}
var sa windows.Sockaddr
sa, err = bind.v4.Open(windows.AF_INET, &windows.SockaddrInet4{Port: int(port)})
if err != nil {
return 0, err
}
sa, err = bind.v6.Open(windows.AF_INET6, &windows.SockaddrInet6{Port: sa.(*windows.SockaddrInet4).Port})
if err != nil {
return 0, err
}
selectedPort = uint16(sa.(*windows.SockaddrInet6).Port)
for i := 0; i < packetsPerRing; i++ {
err = bind.v4.InsertReceiveRequest()
if err != nil {
return 0, err
}
err = bind.v6.InsertReceiveRequest()
if err != nil {
return 0, err
}
}
atomic.StoreUint32(&bind.isOpen, 1)
return
}
func (bind *WinRingBind) Close() error {
bind.mu.RLock()
if atomic.LoadUint32(&bind.isOpen) != 1 {
bind.mu.RUnlock()
return nil
}
atomic.StoreUint32(&bind.isOpen, 2)
windows.PostQueuedCompletionStatus(bind.v4.rx.iocp, 0, 0, nil)
windows.PostQueuedCompletionStatus(bind.v4.tx.iocp, 0, 0, nil)
windows.PostQueuedCompletionStatus(bind.v6.rx.iocp, 0, 0, nil)
windows.PostQueuedCompletionStatus(bind.v6.tx.iocp, 0, 0, nil)
bind.mu.RUnlock()
bind.mu.Lock()
defer bind.mu.Unlock()
bind.closeAndZero()
return nil
}
func (bind *WinRingBind) SetMark(mark uint32) error {
return nil
}
func (bind *afWinRingBind) InsertReceiveRequest() error {
packet := bind.rx.Push()
dataBuffer := &winrio.Buffer{
Id: bind.rx.id,
Offset: uint32(uintptr(unsafe.Pointer(&packet.data[0])) - bind.rx.packets),
Length: uint32(len(packet.data)),
}
addressBuffer := &winrio.Buffer{
Id: bind.rx.id,
Offset: uint32(uintptr(unsafe.Pointer(&packet.addr)) - bind.rx.packets),
Length: uint32(unsafe.Sizeof(packet.addr)),
}
bind.mu.Lock()
defer bind.mu.Unlock()
return winrio.ReceiveEx(bind.rq, dataBuffer, 1, nil, addressBuffer, nil, nil, 0, uintptr(unsafe.Pointer(packet)))
}
//go:linkname procyield runtime.procyield
func procyield(cycles uint32)
func (bind *afWinRingBind) Receive(buf []byte, isOpen *uint32) (int, Endpoint, error) {
if atomic.LoadUint32(isOpen) != 1 {
return 0, nil, net.ErrClosed
}
bind.rx.mu.Lock()
defer bind.rx.mu.Unlock()
var count uint32
var results [1]winrio.Result
for tries := 0; count == 0 && tries < receiveSpins; tries++ {
if tries > 0 {
if atomic.LoadUint32(isOpen) != 1 {
return 0, nil, net.ErrClosed
}
procyield(1)
}
count = winrio.DequeueCompletion(bind.rx.cq, results[:])
}
if count == 0 {
err := winrio.Notify(bind.rx.cq)
if err != nil {
return 0, nil, err
}
var bytes uint32
var key uintptr
var overlapped *windows.Overlapped
err = windows.GetQueuedCompletionStatus(bind.rx.iocp, &bytes, &key, &overlapped, windows.INFINITE)
if err != nil {
return 0, nil, err
}
if atomic.LoadUint32(isOpen) != 1 {
return 0, nil, net.ErrClosed
}
count = winrio.DequeueCompletion(bind.rx.cq, results[:])
if count == 0 {
return 0, nil, io.ErrNoProgress
}
}
bind.rx.Return(1)
err := bind.InsertReceiveRequest()
if err != nil {
return 0, nil, err
}
if results[0].Status != 0 {
return 0, nil, windows.Errno(results[0].Status)
}
packet := (*ringPacket)(unsafe.Pointer(uintptr(results[0].RequestContext)))
ep := packet.addr
n := copy(buf, packet.data[:results[0].BytesTransferred])
return n, &ep, nil
}
func (bind *WinRingBind) ReceiveIPv4(buf []byte) (int, Endpoint, error) {
bind.mu.RLock()
defer bind.mu.RUnlock()
return bind.v4.Receive(buf, &bind.isOpen)
}
func (bind *WinRingBind) ReceiveIPv6(buf []byte) (int, Endpoint, error) {
bind.mu.RLock()
defer bind.mu.RUnlock()
return bind.v6.Receive(buf, &bind.isOpen)
}
func (bind *afWinRingBind) Send(buf []byte, nend *WinRingEndpoint, isOpen *uint32) error {
if atomic.LoadUint32(isOpen) != 1 {
return net.ErrClosed
}
if len(buf) > bytesPerPacket {
return io.ErrShortBuffer
}
bind.tx.mu.Lock()
defer bind.tx.mu.Unlock()
var results [packetsPerRing]winrio.Result
count := winrio.DequeueCompletion(bind.tx.cq, results[:])
if count == 0 && bind.tx.isFull {
err := winrio.Notify(bind.tx.cq)
if err != nil {
return err
}
var bytes uint32
var key uintptr
var overlapped *windows.Overlapped
err = windows.GetQueuedCompletionStatus(bind.tx.iocp, &bytes, &key, &overlapped, windows.INFINITE)
if err != nil {
return err
}
if atomic.LoadUint32(isOpen) != 1 {
return net.ErrClosed
}
count = winrio.DequeueCompletion(bind.tx.cq, results[:])
if count == 0 {
return io.ErrNoProgress
}
}
if count > 0 {
bind.tx.Return(count)
}
packet := bind.tx.Push()
packet.addr = *nend
copy(packet.data[:], buf)
dataBuffer := &winrio.Buffer{
Id: bind.tx.id,
Offset: uint32(uintptr(unsafe.Pointer(&packet.data[0])) - bind.tx.packets),
Length: uint32(len(buf)),
}
addressBuffer := &winrio.Buffer{
Id: bind.tx.id,
Offset: uint32(uintptr(unsafe.Pointer(&packet.addr)) - bind.tx.packets),
Length: uint32(unsafe.Sizeof(packet.addr)),
}
bind.mu.Lock()
defer bind.mu.Unlock()
return winrio.SendEx(bind.rq, dataBuffer, 1, nil, addressBuffer, nil, nil, 0, 0)
}
func (bind *WinRingBind) Send(buf []byte, endpoint Endpoint) error {
nend, ok := endpoint.(*WinRingEndpoint)
if !ok {
return ErrWrongEndpointType
}
bind.mu.RLock()
defer bind.mu.RUnlock()
switch nend.family {
case windows.AF_INET:
if bind.v4.blackhole {
return nil
}
return bind.v4.Send(buf, nend, &bind.isOpen)
case windows.AF_INET6:
if bind.v6.blackhole {
return nil
}
return bind.v6.Send(buf, nend, &bind.isOpen)
}
return nil
}
func (bind *StdNetBind) BindSocketToInterface4(interfaceIndex uint32, blackhole bool) error {
sysconn, err := bind.ipv4.SyscallConn()
if err != nil {
return err
}
err2 := sysconn.Control(func(fd uintptr) {
err = bindSocketToInterface4(windows.Handle(fd), interfaceIndex)
})
if err2 != nil {
return err2
}
if err != nil {
return err
}
bind.blackhole4 = blackhole
return nil
}
func (bind *StdNetBind) BindSocketToInterface6(interfaceIndex uint32, blackhole bool) error {
sysconn, err := bind.ipv6.SyscallConn()
if err != nil {
return err
}
err2 := sysconn.Control(func(fd uintptr) {
err = bindSocketToInterface6(windows.Handle(fd), interfaceIndex)
})
if err2 != nil {
return err2
}
if err != nil {
return err
}
bind.blackhole6 = blackhole
return nil
}
func (bind *WinRingBind) BindSocketToInterface4(interfaceIndex uint32, blackhole bool) error {
bind.mu.RLock()
defer bind.mu.RUnlock()
if atomic.LoadUint32(&bind.isOpen) != 1 {
return net.ErrClosed
}
err := bindSocketToInterface4(bind.v4.sock, interfaceIndex)
if err != nil {
return err
}
bind.v4.blackhole = blackhole
return nil
}
func (bind *WinRingBind) BindSocketToInterface6(interfaceIndex uint32, blackhole bool) error {
bind.mu.RLock()
defer bind.mu.RUnlock()
if atomic.LoadUint32(&bind.isOpen) != 1 {
return net.ErrClosed
}
err := bindSocketToInterface6(bind.v6.sock, interfaceIndex)
if err != nil {
return err
}
bind.v6.blackhole = blackhole
return nil
}
func bindSocketToInterface4(handle windows.Handle, interfaceIndex uint32) error {
const IP_UNICAST_IF = 31
/* MSDN says for IPv4 this needs to be in net byte order, so that it's like an IP address with leading zeros. */
var bytes [4]byte
binary.BigEndian.PutUint32(bytes[:], interfaceIndex)
interfaceIndex = *(*uint32)(unsafe.Pointer(&bytes[0]))
err := windows.SetsockoptInt(handle, windows.IPPROTO_IP, IP_UNICAST_IF, int(interfaceIndex))
if err != nil {
return err
}
return nil
}
func bindSocketToInterface6(handle windows.Handle, interfaceIndex uint32) error {
const IPV6_UNICAST_IF = 31
return windows.SetsockoptInt(handle, windows.IPPROTO_IPV6, IPV6_UNICAST_IF, int(interfaceIndex))
}
// unsafeSlice updates the slice slicePtr to be a slice
// referencing the provided data with its length & capacity set to
// lenCap.
//
// TODO: when Go 1.16 or Go 1.17 is the minimum supported version,
// update callers to use unsafe.Slice instead of this.
func unsafeSlice(slicePtr, data unsafe.Pointer, lenCap int) {
type sliceHeader struct {
Data unsafe.Pointer
Len int
Cap int
}
h := (*sliceHeader)(slicePtr)
h.Data = data
h.Len = lenCap
h.Cap = lenCap
}

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@ -1,59 +0,0 @@
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
*/
package conn
import (
"encoding/binary"
"unsafe"
"golang.org/x/sys/windows"
)
const (
sockoptIP_UNICAST_IF = 31
sockoptIPV6_UNICAST_IF = 31
)
func (bind *StdNetBind) BindSocketToInterface4(interfaceIndex uint32, blackhole bool) error {
/* MSDN says for IPv4 this needs to be in net byte order, so that it's like an IP address with leading zeros. */
bytes := make([]byte, 4)
binary.BigEndian.PutUint32(bytes, interfaceIndex)
interfaceIndex = *(*uint32)(unsafe.Pointer(&bytes[0]))
sysconn, err := bind.ipv4.SyscallConn()
if err != nil {
return err
}
err2 := sysconn.Control(func(fd uintptr) {
err = windows.SetsockoptInt(windows.Handle(fd), windows.IPPROTO_IP, sockoptIP_UNICAST_IF, int(interfaceIndex))
})
if err2 != nil {
return err2
}
if err != nil {
return err
}
bind.blackhole4 = blackhole
return nil
}
func (bind *StdNetBind) BindSocketToInterface6(interfaceIndex uint32, blackhole bool) error {
sysconn, err := bind.ipv6.SyscallConn()
if err != nil {
return err
}
err2 := sysconn.Control(func(fd uintptr) {
err = windows.SetsockoptInt(windows.Handle(fd), windows.IPPROTO_IPV6, sockoptIPV6_UNICAST_IF, int(interfaceIndex))
})
if err2 != nil {
return err2
}
if err != nil {
return err
}
bind.blackhole6 = blackhole
return nil
}

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@ -1,4 +1,4 @@
// +build !linux
// +build !linux,!windows
/* SPDX-License-Identifier: MIT
*

243
conn/winrio/rio_windows.go Normal file
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@ -0,0 +1,243 @@
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2021 WireGuard LLC. All Rights Reserved.
*/
package winrio
import (
"log"
"sync"
"syscall"
"unsafe"
"golang.org/x/sys/windows"
)
const (
MsgDontNotify = 1
MsgDefer = 2
MsgWaitAll = 4
MsgCommitOnly = 8
MaxCqSize = 0x8000000
invalidBufferId = 0xFFFFFFFF
invalidCq = 0
invalidRq = 0
corruptCq = 0xFFFFFFFF
)
var extensionFunctionTable struct {
cbSize uint32
rioReceive uintptr
rioReceiveEx uintptr
rioSend uintptr
rioSendEx uintptr
rioCloseCompletionQueue uintptr
rioCreateCompletionQueue uintptr
rioCreateRequestQueue uintptr
rioDequeueCompletion uintptr
rioDeregisterBuffer uintptr
rioNotify uintptr
rioRegisterBuffer uintptr
rioResizeCompletionQueue uintptr
rioResizeRequestQueue uintptr
}
type Cq uintptr
type Rq uintptr
type BufferId uintptr
type Buffer struct {
Id BufferId
Offset uint32
Length uint32
}
type Result struct {
Status int32
BytesTransferred uint32
SocketContext uint64
RequestContext uint64
}
type notificationCompletionType uint32
const (
eventCompletion notificationCompletionType = 1
iocpCompletion notificationCompletionType = 2
)
type eventNotificationCompletion struct {
completionType notificationCompletionType
event windows.Handle
notifyReset uint32
}
type iocpNotificationCompletion struct {
completionType notificationCompletionType
iocp windows.Handle
key uintptr
overlapped *windows.Overlapped
}
var initialized sync.Once
var available bool
func Initialize() bool {
initialized.Do(func() {
var (
err error
socket windows.Handle
cq Cq
)
defer func() {
if err == nil {
return
}
if maj, _, _ := windows.RtlGetNtVersionNumbers(); maj <= 7 {
return
}
log.Printf("Registered I/O is unavailable: %v", err)
}()
socket, err = Socket(windows.AF_INET, windows.SOCK_DGRAM, windows.IPPROTO_UDP)
if err != nil {
return
}
defer windows.CloseHandle(socket)
var WSAID_MULTIPLE_RIO = &windows.GUID{0x8509e081, 0x96dd, 0x4005, [8]byte{0xb1, 0x65, 0x9e, 0x2e, 0xe8, 0xc7, 0x9e, 0x3f}}
const SIO_GET_MULTIPLE_EXTENSION_FUNCTION_POINTER = 0xc8000024
ob := uint32(0)
err = windows.WSAIoctl(socket, SIO_GET_MULTIPLE_EXTENSION_FUNCTION_POINTER,
(*byte)(unsafe.Pointer(WSAID_MULTIPLE_RIO)), uint32(unsafe.Sizeof(*WSAID_MULTIPLE_RIO)),
(*byte)(unsafe.Pointer(&extensionFunctionTable)), uint32(unsafe.Sizeof(extensionFunctionTable)),
&ob, nil, 0)
if err != nil {
return
}
// While we should be able to stop here, after getting the function pointers, some anti-virus actually causes
// failures in RIOCreateRequestQueue, so keep going to be certain this is supported.
cq, err = CreatePolledCompletionQueue(2)
if err != nil {
return
}
defer CloseCompletionQueue(cq)
_, err = CreateRequestQueue(socket, 1, 1, 1, 1, cq, cq, 0)
if err != nil {
return
}
available = true
})
return available
}
func Socket(af, typ, proto int32) (windows.Handle, error) {
return windows.WSASocket(af, typ, proto, nil, 0, windows.WSA_FLAG_REGISTERED_IO)
}
func CloseCompletionQueue(cq Cq) {
_, _, _ = syscall.Syscall(extensionFunctionTable.rioCloseCompletionQueue, 1, uintptr(cq), 0, 0)
}
func CreateEventCompletionQueue(queueSize uint32, event windows.Handle, notifyReset bool) (Cq, error) {
notificationCompletion := &eventNotificationCompletion{
completionType: eventCompletion,
event: event,
}
if notifyReset {
notificationCompletion.notifyReset = 1
}
ret, _, err := syscall.Syscall(extensionFunctionTable.rioCreateCompletionQueue, 2, uintptr(queueSize), uintptr(unsafe.Pointer(notificationCompletion)), 0)
if ret == invalidCq {
return 0, err
}
return Cq(ret), nil
}
func CreateIOCPCompletionQueue(queueSize uint32, iocp windows.Handle, key uintptr, overlapped *windows.Overlapped) (Cq, error) {
notificationCompletion := &iocpNotificationCompletion{
completionType: iocpCompletion,
iocp: iocp,
overlapped: overlapped,
}
ret, _, err := syscall.Syscall(extensionFunctionTable.rioCreateCompletionQueue, 2, uintptr(queueSize), uintptr(unsafe.Pointer(notificationCompletion)), 0)
if ret == invalidCq {
return 0, err
}
return Cq(ret), nil
}
func CreatePolledCompletionQueue(queueSize uint32) (Cq, error) {
ret, _, err := syscall.Syscall(extensionFunctionTable.rioCreateCompletionQueue, 2, uintptr(queueSize), 0, 0)
if ret == invalidCq {
return 0, err
}
return Cq(ret), nil
}
func CreateRequestQueue(socket windows.Handle, maxOutstandingReceive, maxReceiveDataBuffers, maxOutstandingSend, maxSendDataBuffers uint32, receiveCq, sendCq Cq, socketContext uintptr) (Rq, error) {
ret, _, err := syscall.Syscall9(extensionFunctionTable.rioCreateRequestQueue, 8, uintptr(socket), uintptr(maxOutstandingReceive), uintptr(maxReceiveDataBuffers), uintptr(maxOutstandingSend), uintptr(maxSendDataBuffers), uintptr(receiveCq), uintptr(sendCq), socketContext, 0)
if ret == invalidRq {
return 0, err
}
return Rq(ret), nil
}
func DequeueCompletion(cq Cq, results []Result) uint32 {
var array uintptr
if len(results) > 0 {
array = uintptr(unsafe.Pointer(&results[0]))
}
ret, _, _ := syscall.Syscall(extensionFunctionTable.rioDequeueCompletion, 3, uintptr(cq), array, uintptr(len(results)))
if ret == corruptCq {
panic("cq is corrupt")
}
return uint32(ret)
}
func DeregisterBuffer(id BufferId) {
_, _, _ = syscall.Syscall(extensionFunctionTable.rioDeregisterBuffer, 1, uintptr(id), 0, 0)
}
func RegisterBuffer(buffer []byte) (BufferId, error) {
var buf unsafe.Pointer
if len(buffer) > 0 {
buf = unsafe.Pointer(&buffer[0])
}
return RegisterPointer(buf, uint32(len(buffer)))
}
func RegisterPointer(ptr unsafe.Pointer, size uint32) (BufferId, error) {
ret, _, err := syscall.Syscall(extensionFunctionTable.rioRegisterBuffer, 2, uintptr(ptr), uintptr(size), 0)
if ret == invalidBufferId {
return 0, err
}
return BufferId(ret), nil
}
func SendEx(rq Rq, buf *Buffer, dataBufferCount uint32, localAddress, remoteAddress, controlContext, flags *Buffer, sflags uint32, requestContext uintptr) error {
ret, _, err := syscall.Syscall9(extensionFunctionTable.rioSendEx, 9, uintptr(rq), uintptr(unsafe.Pointer(buf)), uintptr(dataBufferCount), uintptr(unsafe.Pointer(localAddress)), uintptr(unsafe.Pointer(remoteAddress)), uintptr(unsafe.Pointer(controlContext)), uintptr(unsafe.Pointer(flags)), uintptr(sflags), requestContext)
if ret == 0 {
return err
}
return nil
}
func ReceiveEx(rq Rq, buf *Buffer, dataBufferCount uint32, localAddress, remoteAddress, controlContext, flags *Buffer, sflags uint32, requestContext uintptr) error {
ret, _, err := syscall.Syscall9(extensionFunctionTable.rioReceiveEx, 9, uintptr(rq), uintptr(unsafe.Pointer(buf)), uintptr(dataBufferCount), uintptr(unsafe.Pointer(localAddress)), uintptr(unsafe.Pointer(remoteAddress)), uintptr(unsafe.Pointer(controlContext)), uintptr(unsafe.Pointer(flags)), uintptr(sflags), requestContext)
if ret == 0 {
return err
}
return nil
}
func Notify(cq Cq) error {
ret, _, _ := syscall.Syscall(extensionFunctionTable.rioNotify, 1, uintptr(cq), 0, 0)
if ret != 0 {
return windows.Errno(ret)
}
return nil
}

View File

@ -1,4 +1,4 @@
// +build !android,!ios
// +build !android,!ios,!windows
/* SPDX-License-Identifier: MIT
*

View File

@ -0,0 +1,15 @@
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
*/
package device
const (
QueueStagedSize = 128
QueueOutboundSize = 1024
QueueInboundSize = 1024
QueueHandshakeSize = 1024
MaxSegmentSize = 2048 - 32 // largest possible UDP datagram
PreallocatedBuffersPerPool = 0 // Disable and allow for infinite memory growth
)

6
go.mod
View File

@ -3,7 +3,7 @@ module golang.zx2c4.com/wireguard
go 1.16
require (
golang.org/x/crypto v0.0.0-20201221181555-eec23a3978ad
golang.org/x/net v0.0.0-20201224014010-6772e930b67b
golang.org/x/sys v0.0.0-20210105210732-16f7687f5001
golang.org/x/crypto v0.0.0-20210220033148-5ea612d1eb83
golang.org/x/net v0.0.0-20210224082022-3d97a244fca7
golang.org/x/sys v0.0.0-20210225014209-683adc9d29d7
)

13
go.sum
View File

@ -1,17 +1,16 @@
golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
golang.org/x/crypto v0.0.0-20201221181555-eec23a3978ad h1:DN0cp81fZ3njFcrLCytUHRSUkqBjfTo4Tx9RJTWs0EY=
golang.org/x/crypto v0.0.0-20201221181555-eec23a3978ad/go.mod h1:jdWPYTVW3xRLrWPugEBEK3UY2ZEsg3UU495nc5E+M+I=
golang.org/x/crypto v0.0.0-20210220033148-5ea612d1eb83 h1:/ZScEX8SfEmUGRHs0gxpqteO5nfNW6axyZbBdw9A12g=
golang.org/x/crypto v0.0.0-20210220033148-5ea612d1eb83/go.mod h1:jdWPYTVW3xRLrWPugEBEK3UY2ZEsg3UU495nc5E+M+I=
golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/net v0.0.0-20201224014010-6772e930b67b h1:iFwSg7t5GZmB/Q5TjiEAsdoLDrdJRC1RiF2WhuV29Qw=
golang.org/x/net v0.0.0-20201224014010-6772e930b67b/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
golang.org/x/net v0.0.0-20210224082022-3d97a244fca7 h1:OgUuv8lsRpBibGNbSizVwKWlysjaNzmC9gYMhPVfqFM=
golang.org/x/net v0.0.0-20210224082022-3d97a244fca7/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210105210732-16f7687f5001 h1:/dSxr6gT0FNI1MO5WLJo8mTmItROeOKTkDn+7OwWBos=
golang.org/x/sys v0.0.0-20210105210732-16f7687f5001/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210225014209-683adc9d29d7 h1:pk3Y+QnSKjMLfO/HIqzn/Zvv3/IHjRPhwblrmUuodzw=
golang.org/x/sys v0.0.0-20210225014209-683adc9d29d7/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/term v0.0.0-20201117132131-f5c789dd3221/go.mod h1:Nr5EML6q2oocZ2LXRh80K7BxOlk5/8JxuGnuhpl+muw=
golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e h1:FDhOuMEY4JVRztM/gsbk+IKUQ8kj74bxZrgw87eMMVc=
golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=