Update dependencies

vendor/golang.zx2c4.com/wintun/session.go

@@ -0,0 +1,92 @@
+//go:build windows
+
+/* SPDX-License-Identifier: MIT
+ *
+ * Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
+ */
+
+package wintun
+
+import (
+	"syscall"
+	"unsafe"
+
+	"golang.org/x/sys/windows"
+)
+
+type Session struct {
+	handle uintptr
+}
+
+const (
+	PacketSizeMax   = 0xffff    // Maximum packet size
+	RingCapacityMin = 0x20000   // Minimum ring capacity (128 kiB)
+	RingCapacityMax = 0x4000000 // Maximum ring capacity (64 MiB)
+)
+
+// Packet with data
+type Packet struct {
+	Next *Packet              // Pointer to next packet in queue
+	Size uint32               // Size of packet (max WINTUN_MAX_IP_PACKET_SIZE)
+	Data *[PacketSizeMax]byte // Pointer to layer 3 IPv4 or IPv6 packet
+}
+
+var (
+	procWintunAllocateSendPacket   = modwintun.NewProc("WintunAllocateSendPacket")
+	procWintunEndSession           = modwintun.NewProc("WintunEndSession")
+	procWintunGetReadWaitEvent     = modwintun.NewProc("WintunGetReadWaitEvent")
+	procWintunReceivePacket        = modwintun.NewProc("WintunReceivePacket")
+	procWintunReleaseReceivePacket = modwintun.NewProc("WintunReleaseReceivePacket")
+	procWintunSendPacket           = modwintun.NewProc("WintunSendPacket")
+	procWintunStartSession         = modwintun.NewProc("WintunStartSession")
+)
+
+func (wintun *Adapter) StartSession(capacity uint32) (session Session, err error) {
+	r0, _, e1 := syscall.Syscall(procWintunStartSession.Addr(), 2, uintptr(wintun.handle), uintptr(capacity), 0)
+	if r0 == 0 {
+		err = e1
+	} else {
+		session = Session{r0}
+	}
+	return
+}
+
+func (session Session) End() {
+	syscall.Syscall(procWintunEndSession.Addr(), 1, session.handle, 0, 0)
+	session.handle = 0
+}
+
+func (session Session) ReadWaitEvent() (handle windows.Handle) {
+	r0, _, _ := syscall.Syscall(procWintunGetReadWaitEvent.Addr(), 1, session.handle, 0, 0)
+	handle = windows.Handle(r0)
+	return
+}
+
+func (session Session) ReceivePacket() (packet []byte, err error) {
+	var packetSize uint32
+	r0, _, e1 := syscall.Syscall(procWintunReceivePacket.Addr(), 2, session.handle, uintptr(unsafe.Pointer(&packetSize)), 0)
+	if r0 == 0 {
+		err = e1
+		return
+	}
+	packet = unsafe.Slice((*byte)(unsafe.Pointer(r0)), packetSize)
+	return
+}
+
+func (session Session) ReleaseReceivePacket(packet []byte) {
+	syscall.Syscall(procWintunReleaseReceivePacket.Addr(), 2, session.handle, uintptr(unsafe.Pointer(&packet[0])), 0)
+}
+
+func (session Session) AllocateSendPacket(packetSize int) (packet []byte, err error) {
+	r0, _, e1 := syscall.Syscall(procWintunAllocateSendPacket.Addr(), 2, session.handle, uintptr(packetSize), 0)
+	if r0 == 0 {
+		err = e1
+		return
+	}
+	packet = unsafe.Slice((*byte)(unsafe.Pointer(r0)), packetSize)
+	return
+}
+
+func (session Session) SendPacket(packet []byte) {
+	syscall.Syscall(procWintunSendPacket.Addr(), 2, session.handle, uintptr(unsafe.Pointer(&packet[0])), 0)
+}