delete unused part(tun/allow_ip)

This commit is contained in:
KusakabeSi 2021-08-16 03:10:56 +00:00
parent 7801b56b41
commit 1fa36f77ac
38 changed files with 0 additions and 7368 deletions

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@ -1,311 +0,0 @@
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
*/
package device
import (
"container/list"
"errors"
"math/bits"
"net"
"sync"
"unsafe"
)
type parentIndirection struct {
parentBit **trieEntry
parentBitType uint8
}
type trieEntry struct {
peer *Peer
child [2]*trieEntry
parent parentIndirection
cidr uint8
bitAtByte uint8
bitAtShift uint8
bits net.IP
perPeerElem *list.Element
}
func isLittleEndian() bool {
one := uint32(1)
return *(*byte)(unsafe.Pointer(&one)) != 0
}
func swapU32(i uint32) uint32 {
if !isLittleEndian() {
return i
}
return bits.ReverseBytes32(i)
}
func swapU64(i uint64) uint64 {
if !isLittleEndian() {
return i
}
return bits.ReverseBytes64(i)
}
func commonBits(ip1 net.IP, ip2 net.IP) uint8 {
size := len(ip1)
if size == net.IPv4len {
a := (*uint32)(unsafe.Pointer(&ip1[0]))
b := (*uint32)(unsafe.Pointer(&ip2[0]))
x := *a ^ *b
return uint8(bits.LeadingZeros32(swapU32(x)))
} else if size == net.IPv6len {
a := (*uint64)(unsafe.Pointer(&ip1[0]))
b := (*uint64)(unsafe.Pointer(&ip2[0]))
x := *a ^ *b
if x != 0 {
return uint8(bits.LeadingZeros64(swapU64(x)))
}
a = (*uint64)(unsafe.Pointer(&ip1[8]))
b = (*uint64)(unsafe.Pointer(&ip2[8]))
x = *a ^ *b
return 64 + uint8(bits.LeadingZeros64(swapU64(x)))
} else {
panic("Wrong size bit string")
}
}
func (node *trieEntry) addToPeerEntries() {
node.perPeerElem = node.peer.trieEntries.PushBack(node)
}
func (node *trieEntry) removeFromPeerEntries() {
if node.perPeerElem != nil {
node.peer.trieEntries.Remove(node.perPeerElem)
node.perPeerElem = nil
}
}
func (node *trieEntry) choose(ip net.IP) byte {
return (ip[node.bitAtByte] >> node.bitAtShift) & 1
}
func (node *trieEntry) maskSelf() {
mask := net.CIDRMask(int(node.cidr), len(node.bits)*8)
for i := 0; i < len(mask); i++ {
node.bits[i] &= mask[i]
}
}
func (node *trieEntry) zeroizePointers() {
// Make the garbage collector's life slightly easier
node.peer = nil
node.child[0] = nil
node.child[1] = nil
node.parent.parentBit = nil
}
func (node *trieEntry) nodePlacement(ip net.IP, cidr uint8) (parent *trieEntry, exact bool) {
for node != nil && node.cidr <= cidr && commonBits(node.bits, ip) >= node.cidr {
parent = node
if parent.cidr == cidr {
exact = true
return
}
bit := node.choose(ip)
node = node.child[bit]
}
return
}
func (trie parentIndirection) insert(ip net.IP, cidr uint8, peer *Peer) {
if *trie.parentBit == nil {
node := &trieEntry{
peer: peer,
parent: trie,
bits: ip,
cidr: cidr,
bitAtByte: cidr / 8,
bitAtShift: 7 - (cidr % 8),
}
node.maskSelf()
node.addToPeerEntries()
*trie.parentBit = node
return
}
node, exact := (*trie.parentBit).nodePlacement(ip, cidr)
if exact {
node.removeFromPeerEntries()
node.peer = peer
node.addToPeerEntries()
return
}
newNode := &trieEntry{
peer: peer,
bits: ip,
cidr: cidr,
bitAtByte: cidr / 8,
bitAtShift: 7 - (cidr % 8),
}
newNode.maskSelf()
newNode.addToPeerEntries()
var down *trieEntry
if node == nil {
down = *trie.parentBit
} else {
bit := node.choose(ip)
down = node.child[bit]
if down == nil {
newNode.parent = parentIndirection{&node.child[bit], bit}
node.child[bit] = newNode
return
}
}
common := commonBits(down.bits, ip)
if common < cidr {
cidr = common
}
parent := node
if newNode.cidr == cidr {
bit := newNode.choose(down.bits)
down.parent = parentIndirection{&newNode.child[bit], bit}
newNode.child[bit] = down
if parent == nil {
newNode.parent = trie
*trie.parentBit = newNode
} else {
bit := parent.choose(newNode.bits)
newNode.parent = parentIndirection{&parent.child[bit], bit}
parent.child[bit] = newNode
}
return
}
node = &trieEntry{
bits: append([]byte{}, newNode.bits...),
cidr: cidr,
bitAtByte: cidr / 8,
bitAtShift: 7 - (cidr % 8),
}
node.maskSelf()
bit := node.choose(down.bits)
down.parent = parentIndirection{&node.child[bit], bit}
node.child[bit] = down
bit = node.choose(newNode.bits)
newNode.parent = parentIndirection{&node.child[bit], bit}
node.child[bit] = newNode
if parent == nil {
node.parent = trie
*trie.parentBit = node
} else {
bit := parent.choose(node.bits)
node.parent = parentIndirection{&parent.child[bit], bit}
parent.child[bit] = node
}
}
func (node *trieEntry) lookup(ip net.IP) *Peer {
var found *Peer
size := uint8(len(ip))
for node != nil && commonBits(node.bits, ip) >= node.cidr {
if node.peer != nil {
found = node.peer
}
if node.bitAtByte == size {
break
}
bit := node.choose(ip)
node = node.child[bit]
}
return found
}
type AllowedIPs struct {
IPv4 *trieEntry
IPv6 *trieEntry
mutex sync.RWMutex
}
func (table *AllowedIPs) EntriesForPeer(peer *Peer, cb func(ip net.IP, cidr uint8) bool) {
table.mutex.RLock()
defer table.mutex.RUnlock()
for elem := peer.trieEntries.Front(); elem != nil; elem = elem.Next() {
node := elem.Value.(*trieEntry)
if !cb(node.bits, node.cidr) {
return
}
}
}
func (table *AllowedIPs) RemoveByPeer(peer *Peer) {
table.mutex.Lock()
defer table.mutex.Unlock()
var next *list.Element
for elem := peer.trieEntries.Front(); elem != nil; elem = next {
next = elem.Next()
node := elem.Value.(*trieEntry)
node.removeFromPeerEntries()
node.peer = nil
if node.child[0] != nil && node.child[1] != nil {
continue
}
bit := 0
if node.child[0] == nil {
bit = 1
}
child := node.child[bit]
if child != nil {
child.parent = node.parent
}
*node.parent.parentBit = child
if node.child[0] != nil || node.child[1] != nil || node.parent.parentBitType > 1 {
node.zeroizePointers()
continue
}
parent := (*trieEntry)(unsafe.Pointer(uintptr(unsafe.Pointer(node.parent.parentBit)) - unsafe.Offsetof(node.child) - unsafe.Sizeof(node.child[0])*uintptr(node.parent.parentBitType)))
if parent.peer != nil {
node.zeroizePointers()
continue
}
child = parent.child[node.parent.parentBitType^1]
if child != nil {
child.parent = parent.parent
}
*parent.parent.parentBit = child
node.zeroizePointers()
parent.zeroizePointers()
}
}
func (table *AllowedIPs) Insert(ip net.IP, cidr uint8, peer *Peer) {
table.mutex.Lock()
defer table.mutex.Unlock()
switch len(ip) {
case net.IPv6len:
parentIndirection{&table.IPv6, 2}.insert(ip, cidr, peer)
case net.IPv4len:
parentIndirection{&table.IPv4, 2}.insert(ip, cidr, peer)
default:
panic(errors.New("inserting unknown address type"))
}
}
func (table *AllowedIPs) Lookup(address []byte) *Peer {
table.mutex.RLock()
defer table.mutex.RUnlock()
switch len(address) {
case net.IPv6len:
return table.IPv6.lookup(address)
case net.IPv4len:
return table.IPv4.lookup(address)
default:
panic(errors.New("looking up unknown address type"))
}
}

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/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
*/
package device
import (
"math/rand"
"net"
"sort"
"testing"
)
const (
NumberOfPeers = 100
NumberOfPeerRemovals = 4
NumberOfAddresses = 250
NumberOfTests = 10000
)
type SlowNode struct {
peer *Peer
cidr uint8
bits []byte
}
type SlowRouter []*SlowNode
func (r SlowRouter) Len() int {
return len(r)
}
func (r SlowRouter) Less(i, j int) bool {
return r[i].cidr > r[j].cidr
}
func (r SlowRouter) Swap(i, j int) {
r[i], r[j] = r[j], r[i]
}
func (r SlowRouter) Insert(addr []byte, cidr uint8, peer *Peer) SlowRouter {
for _, t := range r {
if t.cidr == cidr && commonBits(t.bits, addr) >= cidr {
t.peer = peer
t.bits = addr
return r
}
}
r = append(r, &SlowNode{
cidr: cidr,
bits: addr,
peer: peer,
})
sort.Sort(r)
return r
}
func (r SlowRouter) Lookup(addr []byte) *Peer {
for _, t := range r {
common := commonBits(t.bits, addr)
if common >= t.cidr {
return t.peer
}
}
return nil
}
func (r SlowRouter) RemoveByPeer(peer *Peer) SlowRouter {
n := 0
for _, x := range r {
if x.peer != peer {
r[n] = x
n++
}
}
return r[:n]
}
func TestTrieRandom(t *testing.T) {
var slow4, slow6 SlowRouter
var peers []*Peer
var allowedIPs AllowedIPs
rand.Seed(1)
for n := 0; n < NumberOfPeers; n++ {
peers = append(peers, &Peer{})
}
for n := 0; n < NumberOfAddresses; n++ {
var addr4 [4]byte
rand.Read(addr4[:])
cidr := uint8(rand.Intn(32) + 1)
index := rand.Intn(NumberOfPeers)
allowedIPs.Insert(addr4[:], cidr, peers[index])
slow4 = slow4.Insert(addr4[:], cidr, peers[index])
var addr6 [16]byte
rand.Read(addr6[:])
cidr = uint8(rand.Intn(128) + 1)
index = rand.Intn(NumberOfPeers)
allowedIPs.Insert(addr6[:], cidr, peers[index])
slow6 = slow6.Insert(addr6[:], cidr, peers[index])
}
var p int
for p = 0; ; p++ {
for n := 0; n < NumberOfTests; n++ {
var addr4 [4]byte
rand.Read(addr4[:])
peer1 := slow4.Lookup(addr4[:])
peer2 := allowedIPs.Lookup(addr4[:])
if peer1 != peer2 {
t.Errorf("Trie did not match naive implementation, for %v: want %p, got %p", net.IP(addr4[:]), peer1, peer2)
}
var addr6 [16]byte
rand.Read(addr6[:])
peer1 = slow6.Lookup(addr6[:])
peer2 = allowedIPs.Lookup(addr6[:])
if peer1 != peer2 {
t.Errorf("Trie did not match naive implementation, for %v: want %p, got %p", net.IP(addr6[:]), peer1, peer2)
}
}
if p >= len(peers) || p >= NumberOfPeerRemovals {
break
}
allowedIPs.RemoveByPeer(peers[p])
slow4 = slow4.RemoveByPeer(peers[p])
slow6 = slow6.RemoveByPeer(peers[p])
}
for ; p < len(peers); p++ {
allowedIPs.RemoveByPeer(peers[p])
}
if allowedIPs.IPv4 != nil || allowedIPs.IPv6 != nil {
t.Error("Failed to remove all nodes from trie by peer")
}
}

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/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
*/
package device
import (
"math/rand"
"net"
"testing"
)
type testPairCommonBits struct {
s1 []byte
s2 []byte
match uint8
}
func TestCommonBits(t *testing.T) {
tests := []testPairCommonBits{
{s1: []byte{1, 4, 53, 128}, s2: []byte{0, 0, 0, 0}, match: 7},
{s1: []byte{0, 4, 53, 128}, s2: []byte{0, 0, 0, 0}, match: 13},
{s1: []byte{0, 4, 53, 253}, s2: []byte{0, 4, 53, 252}, match: 31},
{s1: []byte{192, 168, 1, 1}, s2: []byte{192, 169, 1, 1}, match: 15},
{s1: []byte{65, 168, 1, 1}, s2: []byte{192, 169, 1, 1}, match: 0},
}
for _, p := range tests {
v := commonBits(p.s1, p.s2)
if v != p.match {
t.Error(
"For slice", p.s1, p.s2,
"expected match", p.match,
",but got", v,
)
}
}
}
func benchmarkTrie(peerNumber int, addressNumber int, addressLength int, b *testing.B) {
var trie *trieEntry
var peers []*Peer
root := parentIndirection{&trie, 2}
rand.Seed(1)
const AddressLength = 4
for n := 0; n < peerNumber; n++ {
peers = append(peers, &Peer{})
}
for n := 0; n < addressNumber; n++ {
var addr [AddressLength]byte
rand.Read(addr[:])
cidr := uint8(rand.Uint32() % (AddressLength * 8))
index := rand.Int() % peerNumber
root.insert(addr[:], cidr, peers[index])
}
for n := 0; n < b.N; n++ {
var addr [AddressLength]byte
rand.Read(addr[:])
trie.lookup(addr[:])
}
}
func BenchmarkTrieIPv4Peers100Addresses1000(b *testing.B) {
benchmarkTrie(100, 1000, net.IPv4len, b)
}
func BenchmarkTrieIPv4Peers10Addresses10(b *testing.B) {
benchmarkTrie(10, 10, net.IPv4len, b)
}
func BenchmarkTrieIPv6Peers100Addresses1000(b *testing.B) {
benchmarkTrie(100, 1000, net.IPv6len, b)
}
func BenchmarkTrieIPv6Peers10Addresses10(b *testing.B) {
benchmarkTrie(10, 10, net.IPv6len, b)
}
/* Test ported from kernel implementation:
* selftest/allowedips.h
*/
func TestTrieIPv4(t *testing.T) {
a := &Peer{}
b := &Peer{}
c := &Peer{}
d := &Peer{}
e := &Peer{}
g := &Peer{}
h := &Peer{}
var allowedIPs AllowedIPs
insert := func(peer *Peer, a, b, c, d byte, cidr uint8) {
allowedIPs.Insert([]byte{a, b, c, d}, cidr, peer)
}
assertEQ := func(peer *Peer, a, b, c, d byte) {
p := allowedIPs.Lookup([]byte{a, b, c, d})
if p != peer {
t.Error("Assert EQ failed")
}
}
assertNEQ := func(peer *Peer, a, b, c, d byte) {
p := allowedIPs.Lookup([]byte{a, b, c, d})
if p == peer {
t.Error("Assert NEQ failed")
}
}
insert(a, 192, 168, 4, 0, 24)
insert(b, 192, 168, 4, 4, 32)
insert(c, 192, 168, 0, 0, 16)
insert(d, 192, 95, 5, 64, 27)
insert(c, 192, 95, 5, 65, 27)
insert(e, 0, 0, 0, 0, 0)
insert(g, 64, 15, 112, 0, 20)
insert(h, 64, 15, 123, 211, 25)
insert(a, 10, 0, 0, 0, 25)
insert(b, 10, 0, 0, 128, 25)
insert(a, 10, 1, 0, 0, 30)
insert(b, 10, 1, 0, 4, 30)
insert(c, 10, 1, 0, 8, 29)
insert(d, 10, 1, 0, 16, 29)
assertEQ(a, 192, 168, 4, 20)
assertEQ(a, 192, 168, 4, 0)
assertEQ(b, 192, 168, 4, 4)
assertEQ(c, 192, 168, 200, 182)
assertEQ(c, 192, 95, 5, 68)
assertEQ(e, 192, 95, 5, 96)
assertEQ(g, 64, 15, 116, 26)
assertEQ(g, 64, 15, 127, 3)
insert(a, 1, 0, 0, 0, 32)
insert(a, 64, 0, 0, 0, 32)
insert(a, 128, 0, 0, 0, 32)
insert(a, 192, 0, 0, 0, 32)
insert(a, 255, 0, 0, 0, 32)
assertEQ(a, 1, 0, 0, 0)
assertEQ(a, 64, 0, 0, 0)
assertEQ(a, 128, 0, 0, 0)
assertEQ(a, 192, 0, 0, 0)
assertEQ(a, 255, 0, 0, 0)
allowedIPs.RemoveByPeer(a)
assertNEQ(a, 1, 0, 0, 0)
assertNEQ(a, 64, 0, 0, 0)
assertNEQ(a, 128, 0, 0, 0)
assertNEQ(a, 192, 0, 0, 0)
assertNEQ(a, 255, 0, 0, 0)
allowedIPs.RemoveByPeer(a)
allowedIPs.RemoveByPeer(b)
allowedIPs.RemoveByPeer(c)
allowedIPs.RemoveByPeer(d)
allowedIPs.RemoveByPeer(e)
allowedIPs.RemoveByPeer(g)
allowedIPs.RemoveByPeer(h)
if allowedIPs.IPv4 != nil || allowedIPs.IPv6 != nil {
t.Error("Expected removing all the peers to empty trie, but it did not")
}
insert(a, 192, 168, 0, 0, 16)
insert(a, 192, 168, 0, 0, 24)
allowedIPs.RemoveByPeer(a)
assertNEQ(a, 192, 168, 0, 1)
}
/* Test ported from kernel implementation:
* selftest/allowedips.h
*/
func TestTrieIPv6(t *testing.T) {
a := &Peer{}
b := &Peer{}
c := &Peer{}
d := &Peer{}
e := &Peer{}
f := &Peer{}
g := &Peer{}
h := &Peer{}
var allowedIPs AllowedIPs
expand := func(a uint32) []byte {
var out [4]byte
out[0] = byte(a >> 24 & 0xff)
out[1] = byte(a >> 16 & 0xff)
out[2] = byte(a >> 8 & 0xff)
out[3] = byte(a & 0xff)
return out[:]
}
insert := func(peer *Peer, a, b, c, d uint32, cidr uint8) {
var addr []byte
addr = append(addr, expand(a)...)
addr = append(addr, expand(b)...)
addr = append(addr, expand(c)...)
addr = append(addr, expand(d)...)
allowedIPs.Insert(addr, cidr, peer)
}
assertEQ := func(peer *Peer, a, b, c, d uint32) {
var addr []byte
addr = append(addr, expand(a)...)
addr = append(addr, expand(b)...)
addr = append(addr, expand(c)...)
addr = append(addr, expand(d)...)
p := allowedIPs.Lookup(addr)
if p != peer {
t.Error("Assert EQ failed")
}
}
insert(d, 0x26075300, 0x60006b00, 0, 0xc05f0543, 128)
insert(c, 0x26075300, 0x60006b00, 0, 0, 64)
insert(e, 0, 0, 0, 0, 0)
insert(f, 0, 0, 0, 0, 0)
insert(g, 0x24046800, 0, 0, 0, 32)
insert(h, 0x24046800, 0x40040800, 0xdeadbeef, 0xdeadbeef, 64)
insert(a, 0x24046800, 0x40040800, 0xdeadbeef, 0xdeadbeef, 128)
insert(c, 0x24446800, 0x40e40800, 0xdeaebeef, 0xdefbeef, 128)
insert(b, 0x24446800, 0xf0e40800, 0xeeaebeef, 0, 98)
assertEQ(d, 0x26075300, 0x60006b00, 0, 0xc05f0543)
assertEQ(c, 0x26075300, 0x60006b00, 0, 0xc02e01ee)
assertEQ(f, 0x26075300, 0x60006b01, 0, 0)
assertEQ(g, 0x24046800, 0x40040806, 0, 0x1006)
assertEQ(g, 0x24046800, 0x40040806, 0x1234, 0x5678)
assertEQ(f, 0x240467ff, 0x40040806, 0x1234, 0x5678)
assertEQ(f, 0x24046801, 0x40040806, 0x1234, 0x5678)
assertEQ(h, 0x24046800, 0x40040800, 0x1234, 0x5678)
assertEQ(h, 0x24046800, 0x40040800, 0, 0)
assertEQ(h, 0x24046800, 0x40040800, 0x10101010, 0x10101010)
assertEQ(a, 0x24046800, 0x40040800, 0xdeadbeef, 0xdeadbeef)
}

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/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
*/
package device
import (
"bytes"
"encoding/hex"
"fmt"
"io"
"math/rand"
"net"
"runtime"
"runtime/pprof"
"sync"
"sync/atomic"
"testing"
"time"
"github.com/KusakabeSi/EtherGuardVPN/conn"
"github.com/KusakabeSi/EtherGuardVPN/conn/bindtest"
"github.com/KusakabeSi/EtherGuardVPN/tun/tuntest"
)
// uapiCfg returns a string that contains cfg formatted use with IpcSet.
// cfg is a series of alternating key/value strings.
// uapiCfg exists because editors and humans like to insert
// whitespace into configs, which can cause failures, some of which are silent.
// For example, a leading blank newline causes the remainder
// of the config to be silently ignored.
func uapiCfg(cfg ...string) string {
if len(cfg)%2 != 0 {
panic("odd number of args to uapiReader")
}
buf := new(bytes.Buffer)
for i, s := range cfg {
buf.WriteString(s)
sep := byte('\n')
if i%2 == 0 {
sep = '='
}
buf.WriteByte(sep)
}
return buf.String()
}
// genConfigs generates a pair of configs that connect to each other.
// The configs use distinct, probably-usable ports.
func genConfigs(tb testing.TB) (cfgs [2]string, endpointCfgs [2]string) {
var key1, key2 NoisePrivateKey
_, err := rand.Read(key1[:])
if err != nil {
tb.Errorf("unable to generate private key random bytes: %v", err)
}
_, err = rand.Read(key2[:])
if err != nil {
tb.Errorf("unable to generate private key random bytes: %v", err)
}
pub1, pub2 := key1.publicKey(), key2.publicKey()
cfgs[0] = uapiCfg(
"private_key", hex.EncodeToString(key1[:]),
"listen_port", "0",
"replace_peers", "true",
"public_key", hex.EncodeToString(pub2[:]),
"protocol_version", "1",
"replace_allowed_ips", "true",
"allowed_ip", "1.0.0.2/32",
)
endpointCfgs[0] = uapiCfg(
"public_key", hex.EncodeToString(pub2[:]),
"endpoint", "127.0.0.1:%d",
)
cfgs[1] = uapiCfg(
"private_key", hex.EncodeToString(key2[:]),
"listen_port", "0",
"replace_peers", "true",
"public_key", hex.EncodeToString(pub1[:]),
"protocol_version", "1",
"replace_allowed_ips", "true",
"allowed_ip", "1.0.0.1/32",
)
endpointCfgs[1] = uapiCfg(
"public_key", hex.EncodeToString(pub1[:]),
"endpoint", "127.0.0.1:%d",
)
return
}
// A testPair is a pair of testPeers.
type testPair [2]testPeer
// A testPeer is a peer used for testing.
type testPeer struct {
tun *tuntest.ChannelTUN
dev *Device
ip net.IP
}
type SendDirection bool
const (
Ping SendDirection = true
Pong SendDirection = false
)
func (d SendDirection) String() string {
if d == Ping {
return "ping"
}
return "pong"
}
func (pair *testPair) Send(tb testing.TB, ping SendDirection, done chan struct{}) {
tb.Helper()
p0, p1 := pair[0], pair[1]
if !ping {
// pong is the new ping
p0, p1 = p1, p0
}
msg := tuntest.Ping(p0.ip, p1.ip)
p1.tun.Outbound <- msg
timer := time.NewTimer(5 * time.Second)
defer timer.Stop()
var err error
select {
case msgRecv := <-p0.tun.Inbound:
if !bytes.Equal(msg, msgRecv) {
err = fmt.Errorf("%s did not transit correctly", ping)
}
case <-timer.C:
err = fmt.Errorf("%s did not transit", ping)
case <-done:
}
if err != nil {
// The error may have occurred because the test is done.
select {
case <-done:
return
default:
}
// Real error.
tb.Error(err)
}
}
// genTestPair creates a testPair.
func genTestPair(tb testing.TB, realSocket bool) (pair testPair) {
cfg, endpointCfg := genConfigs(tb)
var binds [2]conn.Bind
if realSocket {
binds[0], binds[1] = conn.NewDefaultBind(), conn.NewDefaultBind()
} else {
binds = bindtest.NewChannelBinds()
}
// Bring up a ChannelTun for each config.
for i := range pair {
p := &pair[i]
p.tun = tuntest.NewChannelTUN()
p.ip = net.IPv4(1, 0, 0, byte(i+1))
level := LogLevelVerbose
if _, ok := tb.(*testing.B); ok && !testing.Verbose() {
level = LogLevelError
}
p.dev = NewDevice(p.tun.TUN(), binds[i], NewLogger(level, fmt.Sprintf("dev%d: ", i)))
if err := p.dev.IpcSet(cfg[i]); err != nil {
tb.Errorf("failed to configure device %d: %v", i, err)
p.dev.Close()
continue
}
if err := p.dev.Up(); err != nil {
tb.Errorf("failed to bring up device %d: %v", i, err)
p.dev.Close()
continue
}
endpointCfg[i^1] = fmt.Sprintf(endpointCfg[i^1], p.dev.net.port)
}
for i := range pair {
p := &pair[i]
if err := p.dev.IpcSet(endpointCfg[i]); err != nil {
tb.Errorf("failed to configure device endpoint %d: %v", i, err)
p.dev.Close()
continue
}
// The device is ready. Close it when the test completes.
tb.Cleanup(p.dev.Close)
}
return
}
func TestTwoDevicePing(t *testing.T) {
goroutineLeakCheck(t)
pair := genTestPair(t, true)
t.Run("ping 1.0.0.1", func(t *testing.T) {
pair.Send(t, Ping, nil)
})
t.Run("ping 1.0.0.2", func(t *testing.T) {
pair.Send(t, Pong, nil)
})
}
func TestUpDown(t *testing.T) {
goroutineLeakCheck(t)
const itrials = 50
const otrials = 10
for n := 0; n < otrials; n++ {
pair := genTestPair(t, false)
for i := range pair {
for k := range pair[i].dev.peers.keyMap {
pair[i].dev.IpcSet(fmt.Sprintf("public_key=%s\npersistent_keepalive_interval=1\n", hex.EncodeToString(k[:])))
}
}
var wg sync.WaitGroup
wg.Add(len(pair))
for i := range pair {
go func(d *Device) {
defer wg.Done()
for i := 0; i < itrials; i++ {
if err := d.Up(); err != nil {
t.Errorf("failed up bring up device: %v", err)
}
time.Sleep(time.Duration(rand.Intn(int(time.Nanosecond * (0x10000 - 1)))))
if err := d.Down(); err != nil {
t.Errorf("failed to bring down device: %v", err)
}
time.Sleep(time.Duration(rand.Intn(int(time.Nanosecond * (0x10000 - 1)))))
}
}(pair[i].dev)
}
wg.Wait()
for i := range pair {
pair[i].dev.Up()
pair[i].dev.Close()
}
}
}
// TestConcurrencySafety does other things concurrently with tunnel use.
// It is intended to be used with the race detector to catch data races.
func TestConcurrencySafety(t *testing.T) {
pair := genTestPair(t, true)
done := make(chan struct{})
const warmupIters = 10
var warmup sync.WaitGroup
warmup.Add(warmupIters)
go func() {
// Send data continuously back and forth until we're done.
// Note that we may continue to attempt to send data
// even after done is closed.
i := warmupIters
for ping := Ping; ; ping = !ping {
pair.Send(t, ping, done)
select {
case <-done:
return
default:
}
if i > 0 {
warmup.Done()
i--
}
}
}()
warmup.Wait()
applyCfg := func(cfg string) {
err := pair[0].dev.IpcSet(cfg)
if err != nil {
t.Fatal(err)
}
}
// Change persistent_keepalive_interval concurrently with tunnel use.
t.Run("persistentKeepaliveInterval", func(t *testing.T) {
var pub NoisePublicKey
for key := range pair[0].dev.peers.keyMap {
pub = key
break
}
cfg := uapiCfg(
"public_key", hex.EncodeToString(pub[:]),
"persistent_keepalive_interval", "1",
)
for i := 0; i < 1000; i++ {
applyCfg(cfg)
}
})
// Change private keys concurrently with tunnel use.
t.Run("privateKey", func(t *testing.T) {
bad := uapiCfg("private_key", "7777777777777777777777777777777777777777777777777777777777777777")
good := uapiCfg("private_key", hex.EncodeToString(pair[0].dev.staticIdentity.privateKey[:]))
// Set iters to a large number like 1000 to flush out data races quickly.
// Don't leave it large. That can cause logical races
// in which the handshake is interleaved with key changes
// such that the private key appears to be unchanging but
// other state gets reset, which can cause handshake failures like
// "Received packet with invalid mac1".
const iters = 1
for i := 0; i < iters; i++ {
applyCfg(bad)
applyCfg(good)
}
})
close(done)
}
func BenchmarkLatency(b *testing.B) {
pair := genTestPair(b, true)
// Establish a connection.
pair.Send(b, Ping, nil)
pair.Send(b, Pong, nil)
b.ResetTimer()
for i := 0; i < b.N; i++ {
pair.Send(b, Ping, nil)
pair.Send(b, Pong, nil)
}
}
func BenchmarkThroughput(b *testing.B) {
pair := genTestPair(b, true)
// Establish a connection.
pair.Send(b, Ping, nil)
pair.Send(b, Pong, nil)
// Measure how long it takes to receive b.N packets,
// starting when we receive the first packet.
var recv uint64
var elapsed time.Duration
var wg sync.WaitGroup
wg.Add(1)
go func() {
defer wg.Done()
var start time.Time
for {
<-pair[0].tun.Inbound
new := atomic.AddUint64(&recv, 1)
if new == 1 {
start = time.Now()
}
// Careful! Don't change this to else if; b.N can be equal to 1.
if new == uint64(b.N) {
elapsed = time.Since(start)
return
}
}
}()
// Send packets as fast as we can until we've received enough.
ping := tuntest.Ping(pair[0].ip, pair[1].ip)
pingc := pair[1].tun.Outbound
var sent uint64
for atomic.LoadUint64(&recv) != uint64(b.N) {
sent++
pingc <- ping
}
wg.Wait()
b.ReportMetric(float64(elapsed)/float64(b.N), "ns/op")
b.ReportMetric(1-float64(b.N)/float64(sent), "packet-loss")
}
func BenchmarkUAPIGet(b *testing.B) {
pair := genTestPair(b, true)
pair.Send(b, Ping, nil)
pair.Send(b, Pong, nil)
b.ReportAllocs()
b.ResetTimer()
for i := 0; i < b.N; i++ {
pair[0].dev.IpcGetOperation(io.Discard)
}
}
func goroutineLeakCheck(t *testing.T) {
goroutines := func() (int, []byte) {
p := pprof.Lookup("goroutine")
b := new(bytes.Buffer)
p.WriteTo(b, 1)
return p.Count(), b.Bytes()
}
startGoroutines, startStacks := goroutines()
t.Cleanup(func() {
if t.Failed() {
return
}
// Give goroutines time to exit, if they need it.
for i := 0; i < 10000; i++ {
if runtime.NumGoroutine() <= startGoroutines {
return
}
time.Sleep(1 * time.Millisecond)
}
endGoroutines, endStacks := goroutines()
t.Logf("starting stacks:\n%s\n", startStacks)
t.Logf("ending stacks:\n%s\n", endStacks)
t.Fatalf("expected %d goroutines, got %d, leak?", startGoroutines, endGoroutines)
})
}

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@ -1,177 +0,0 @@
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
*/
package device
import (
"bytes"
"encoding/binary"
"testing"
"github.com/KusakabeSi/EtherGuardVPN/conn"
"github.com/KusakabeSi/EtherGuardVPN/tun/tuntest"
)
func TestCurveWrappers(t *testing.T) {
sk1, err := newPrivateKey()
assertNil(t, err)
sk2, err := newPrivateKey()
assertNil(t, err)
pk1 := sk1.publicKey()
pk2 := sk2.publicKey()
ss1 := sk1.sharedSecret(pk2)
ss2 := sk2.sharedSecret(pk1)
if ss1 != ss2 {
t.Fatal("Failed to compute shared secet")
}
}
func randDevice(t *testing.T) *Device {
sk, err := newPrivateKey()
if err != nil {
t.Fatal(err)
}
tun := tuntest.NewChannelTUN()
logger := NewLogger(LogLevelError, "")
device := NewDevice(tun.TUN(), conn.NewDefaultBind(), logger)
device.SetPrivateKey(sk)
return device
}
func assertNil(t *testing.T, err error) {
if err != nil {
t.Fatal(err)
}
}
func assertEqual(t *testing.T, a, b []byte) {
if !bytes.Equal(a, b) {
t.Fatal(a, "!=", b)
}
}
func TestNoiseHandshake(t *testing.T) {
dev1 := randDevice(t)
dev2 := randDevice(t)
defer dev1.Close()
defer dev2.Close()
peer1, err := dev2.NewPeer(dev1.staticIdentity.privateKey.publicKey())
if err != nil {
t.Fatal(err)
}
peer2, err := dev1.NewPeer(dev2.staticIdentity.privateKey.publicKey())
if err != nil {
t.Fatal(err)
}
assertEqual(
t,
peer1.handshake.precomputedStaticStatic[:],
peer2.handshake.precomputedStaticStatic[:],
)
/* simulate handshake */
// initiation message
t.Log("exchange initiation message")
msg1, err := dev1.CreateMessageInitiation(peer2)
assertNil(t, err)
packet := make([]byte, 0, 256)
writer := bytes.NewBuffer(packet)
err = binary.Write(writer, binary.LittleEndian, msg1)
assertNil(t, err)
peer := dev2.ConsumeMessageInitiation(msg1)
if peer == nil {
t.Fatal("handshake failed at initiation message")
}
assertEqual(
t,
peer1.handshake.chainKey[:],
peer2.handshake.chainKey[:],
)
assertEqual(
t,
peer1.handshake.hash[:],
peer2.handshake.hash[:],
)
// response message
t.Log("exchange response message")
msg2, err := dev2.CreateMessageResponse(peer1)
assertNil(t, err)
peer = dev1.ConsumeMessageResponse(msg2)
if peer == nil {
t.Fatal("handshake failed at response message")
}
assertEqual(
t,
peer1.handshake.chainKey[:],
peer2.handshake.chainKey[:],
)
assertEqual(
t,
peer1.handshake.hash[:],
peer2.handshake.hash[:],
)
// key pairs
t.Log("deriving keys")
err = peer1.BeginSymmetricSession()
if err != nil {
t.Fatal("failed to derive keypair for peer 1", err)
}
err = peer2.BeginSymmetricSession()
if err != nil {
t.Fatal("failed to derive keypair for peer 2", err)
}
key1 := peer1.keypairs.loadNext()
key2 := peer2.keypairs.current
// encrypting / decryption test
t.Log("test key pairs")
func() {
testMsg := []byte("wireguard test message 1")
var err error
var out []byte
var nonce [12]byte
out = key1.send.Seal(out, nonce[:], testMsg, nil)
out, err = key2.receive.Open(out[:0], nonce[:], out, nil)
assertNil(t, err)
assertEqual(t, out, testMsg)
}()
func() {
testMsg := []byte("wireguard test message 2")
var err error
var out []byte
var nonce [12]byte
out = key2.send.Seal(out, nonce[:], testMsg, nil)
out, err = key1.receive.Open(out[:0], nonce[:], out, nil)
assertNil(t, err)
assertEqual(t, out, testMsg)
}()
}

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@ -1,54 +0,0 @@
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
*/
package device
import (
"fmt"
"sync/atomic"
"github.com/KusakabeSi/EtherGuardVPN/tun"
)
const DefaultMTU = 1420
func (device *Device) RoutineTUNEventReader() {
device.log.Verbosef("Routine: event worker - started")
for event := range device.tun.device.Events() {
if event&tun.EventMTUUpdate != 0 {
mtu, err := device.tun.device.MTU()
if err != nil {
device.log.Errorf("Failed to load updated MTU of device: %v", err)
continue
}
if mtu < 0 {
device.log.Errorf("MTU not updated to negative value: %v", mtu)
continue
}
var tooLarge string
if mtu > MaxContentSize {
tooLarge = fmt.Sprintf(" (too large, capped at %v)", MaxContentSize)
mtu = MaxContentSize
}
old := atomic.SwapInt32(&device.tun.mtu, int32(mtu))
if int(old) != mtu {
device.log.Verbosef("MTU updated: %v%s", mtu, tooLarge)
}
}
if event&tun.EventUp != 0 {
device.log.Verbosef("Interface up requested")
device.Up()
}
if event&tun.EventDown != 0 {
device.log.Verbosef("Interface down requested")
device.Down()
}
}
device.log.Verbosef("Routine: event worker - stopped")
}

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@ -1,51 +0,0 @@
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2021 WireGuard LLC. All Rights Reserved.
*/
package main
import (
"bytes"
"go/format"
"io/fs"
"os"
"path/filepath"
"runtime"
"sync"
"testing"
)
func TestFormatting(t *testing.T) {
var wg sync.WaitGroup
filepath.WalkDir(".", func(path string, d fs.DirEntry, err error) error {
if err != nil {
t.Errorf("unable to walk %s: %v", path, err)
return nil
}
if d.IsDir() || filepath.Ext(path) != ".go" {
return nil
}
wg.Add(1)
go func(path string) {
defer wg.Done()
src, err := os.ReadFile(path)
if err != nil {
t.Errorf("unable to read %s: %v", path, err)
return
}
if runtime.GOOS == "windows" {
src = bytes.ReplaceAll(src, []byte{'\r', '\n'}, []byte{'\n'})
}
formatted, err := format.Source(src)
if err != nil {
t.Errorf("unable to format %s: %v", path, err)
return
}
if !bytes.Equal(src, formatted) {
t.Errorf("unformatted code: %s", path)
}
}(path)
return nil
})
wg.Wait()
}

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@ -1,98 +0,0 @@
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
*/
package main
import (
"fmt"
"os"
"os/signal"
"syscall"
"github.com/KusakabeSi/EtherGuardVPN/conn"
"github.com/KusakabeSi/EtherGuardVPN/device"
"github.com/KusakabeSi/EtherGuardVPN/ipc"
"github.com/KusakabeSi/EtherGuardVPN/tun"
)
const (
ExitSetupSuccess = 0
ExitSetupFailed = 1
)
func main() {
if len(os.Args) != 2 {
os.Exit(ExitSetupFailed)
}
interfaceName := os.Args[1]
fmt.Fprintln(os.Stderr, "Warning: this is a test program for Windows, mainly used for debugging this Go package. For a real WireGuard for Windows client, the repo you want is <https://git.zx2c4.com/wireguard-windows/>, which includes this code as a module.")
logger := device.NewLogger(
device.LogLevelVerbose,
fmt.Sprintf("(%s) ", interfaceName),
)
logger.Verbosef("Starting wireguard-go version %s", Version)
tun, err := tun.CreateTUN(interfaceName, 0)
if err == nil {
realInterfaceName, err2 := tun.Name()
if err2 == nil {
interfaceName = realInterfaceName
}
} else {
logger.Errorf("Failed to create TUN device: %v", err)
os.Exit(ExitSetupFailed)
}
device := device.NewDevice(tun, conn.NewDefaultBind(), logger)
err = device.Up()
if err != nil {
logger.Errorf("Failed to bring up device: %v", err)
os.Exit(ExitSetupFailed)
}
logger.Verbosef("Device started")
uapi, err := ipc.UAPIListen(interfaceName)
if err != nil {
logger.Errorf("Failed to listen on uapi socket: %v", err)
os.Exit(ExitSetupFailed)
}
errs := make(chan error)
term := make(chan os.Signal, 1)
go func() {
for {
conn, err := uapi.Accept()
if err != nil {
errs <- err
return
}
go device.IpcHandle(conn)
}
}()
logger.Verbosef("UAPI listener started")
// wait for program to terminate
signal.Notify(term, os.Interrupt)
signal.Notify(term, os.Kill)
signal.Notify(term, syscall.SIGTERM)
select {
case <-term:
case <-errs:
case <-device.Wait():
}
// clean up
uapi.Close()
device.Close()
logger.Verbosef("Shutting down")
}

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@ -1,425 +0,0 @@
#!/bin/bash
# Copyright (C) 2015-2017 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
# This script tests the below topology:
#
# ┌─────────────────────┐ ┌──────────────────────────────────┐ ┌─────────────────────┐
# │ $ns1 namespace │ │ $ns0 namespace │ │ $ns2 namespace │
# │ │ │ │ │ │
# │┌────────┐ │ │ ┌────────┐ │ │ ┌────────┐│
# ││ wg1 │───────────┼───┼────────────│ lo │────────────┼───┼───────────│ wg2 ││
# │├────────┴──────────┐│ │ ┌───────┴────────┴────────┐ │ │┌──────────┴────────┤│
# ││192.168.241.1/24 ││ │ │(ns1) (ns2) │ │ ││192.168.241.2/24 ││
# ││fd00::1/24 ││ │ │127.0.0.1:1 127.0.0.1:2│ │ ││fd00::2/24 ││
# │└───────────────────┘│ │ │[::]:1 [::]:2 │ │ │└───────────────────┘│
# └─────────────────────┘ │ └─────────────────────────┘ │ └─────────────────────┘
# └──────────────────────────────────┘
#
# After the topology is prepared we run a series of TCP/UDP iperf3 tests between the
# wireguard peers in $ns1 and $ns2. Note that $ns0 is the endpoint for the wg1
# interfaces in $ns1 and $ns2. See https://www.wireguard.com/netns/ for further
# details on how this is accomplished.
# This code is ported to the WireGuard-Go directly from the kernel project.
#
# Please ensure that you have installed the newest version of the WireGuard
# tools from the WireGuard project and before running these tests as:
#
# ./netns.sh <path to wireguard-go>
set -e
exec 3>&1
export WG_HIDE_KEYS=never
netns0="wg-test-$$-0"
netns1="wg-test-$$-1"
netns2="wg-test-$$-2"
program=$1
export LOG_LEVEL="verbose"
pretty() { echo -e "\x1b[32m\x1b[1m[+] ${1:+NS$1: }${2}\x1b[0m" >&3; }
pp() { pretty "" "$*"; "$@"; }
maybe_exec() { if [[ $BASHPID -eq $$ ]]; then "$@"; else exec "$@"; fi; }
n0() { pretty 0 "$*"; maybe_exec ip netns exec $netns0 "$@"; }
n1() { pretty 1 "$*"; maybe_exec ip netns exec $netns1 "$@"; }
n2() { pretty 2 "$*"; maybe_exec ip netns exec $netns2 "$@"; }
ip0() { pretty 0 "ip $*"; ip -n $netns0 "$@"; }
ip1() { pretty 1 "ip $*"; ip -n $netns1 "$@"; }
ip2() { pretty 2 "ip $*"; ip -n $netns2 "$@"; }
sleep() { read -t "$1" -N 0 || true; }
waitiperf() { pretty "${1//*-}" "wait for iperf:5201"; while [[ $(ss -N "$1" -tlp 'sport = 5201') != *iperf3* ]]; do sleep 0.1; done; }
waitncatudp() { pretty "${1//*-}" "wait for udp:1111"; while [[ $(ss -N "$1" -ulp 'sport = 1111') != *ncat* ]]; do sleep 0.1; done; }
waitiface() { pretty "${1//*-}" "wait for $2 to come up"; ip netns exec "$1" bash -c "while [[ \$(< \"/sys/class/net/$2/operstate\") != up ]]; do read -t .1 -N 0 || true; done;"; }
cleanup() {
set +e
exec 2>/dev/null
printf "$orig_message_cost" > /proc/sys/net/core/message_cost
ip0 link del dev wg1
ip1 link del dev wg1
ip2 link del dev wg1
local to_kill="$(ip netns pids $netns0) $(ip netns pids $netns1) $(ip netns pids $netns2)"
[[ -n $to_kill ]] && kill $to_kill
pp ip netns del $netns1
pp ip netns del $netns2
pp ip netns del $netns0
exit
}
orig_message_cost="$(< /proc/sys/net/core/message_cost)"
trap cleanup EXIT
printf 0 > /proc/sys/net/core/message_cost
ip netns del $netns0 2>/dev/null || true
ip netns del $netns1 2>/dev/null || true
ip netns del $netns2 2>/dev/null || true
pp ip netns add $netns0
pp ip netns add $netns1
pp ip netns add $netns2
ip0 link set up dev lo
# ip0 link add dev wg1 type wireguard
n0 $program wg1
ip0 link set wg1 netns $netns1
# ip0 link add dev wg1 type wireguard
n0 $program wg2
ip0 link set wg2 netns $netns2
key1="$(pp wg genkey)"
key2="$(pp wg genkey)"
pub1="$(pp wg pubkey <<<"$key1")"
pub2="$(pp wg pubkey <<<"$key2")"
psk="$(pp wg genpsk)"
[[ -n $key1 && -n $key2 && -n $psk ]]
configure_peers() {
ip1 addr add 192.168.241.1/24 dev wg1
ip1 addr add fd00::1/24 dev wg1
ip2 addr add 192.168.241.2/24 dev wg2
ip2 addr add fd00::2/24 dev wg2
n0 wg set wg1 \
private-key <(echo "$key1") \
listen-port 10000 \
peer "$pub2" \
preshared-key <(echo "$psk") \
allowed-ips 192.168.241.2/32,fd00::2/128
n0 wg set wg2 \
private-key <(echo "$key2") \
listen-port 20000 \
peer "$pub1" \
preshared-key <(echo "$psk") \
allowed-ips 192.168.241.1/32,fd00::1/128
n0 wg showconf wg1
n0 wg showconf wg2
ip1 link set up dev wg1
ip2 link set up dev wg2
sleep 1
}
configure_peers
tests() {
# Ping over IPv4
n2 ping -c 10 -f -W 1 192.168.241.1
n1 ping -c 10 -f -W 1 192.168.241.2
# Ping over IPv6
n2 ping6 -c 10 -f -W 1 fd00::1
n1 ping6 -c 10 -f -W 1 fd00::2
# TCP over IPv4
n2 iperf3 -s -1 -B 192.168.241.2 &
waitiperf $netns2
n1 iperf3 -Z -n 1G -c 192.168.241.2
# TCP over IPv6
n1 iperf3 -s -1 -B fd00::1 &
waitiperf $netns1
n2 iperf3 -Z -n 1G -c fd00::1
# UDP over IPv4
n1 iperf3 -s -1 -B 192.168.241.1 &
waitiperf $netns1
n2 iperf3 -Z -n 1G -b 0 -u -c 192.168.241.1
# UDP over IPv6
n2 iperf3 -s -1 -B fd00::2 &
waitiperf $netns2
n1 iperf3 -Z -n 1G -b 0 -u -c fd00::2
}
[[ $(ip1 link show dev wg1) =~ mtu\ ([0-9]+) ]] && orig_mtu="${BASH_REMATCH[1]}"
big_mtu=$(( 34816 - 1500 + $orig_mtu ))
# Test using IPv4 as outer transport
n0 wg set wg1 peer "$pub2" endpoint 127.0.0.1:20000
n0 wg set wg2 peer "$pub1" endpoint 127.0.0.1:10000
# Before calling tests, we first make sure that the stats counters are working
n2 ping -c 10 -f -W 1 192.168.241.1
{ read _; read _; read _; read rx_bytes _; read _; read tx_bytes _; } < <(ip2 -stats link show dev wg2)
ip2 -stats link show dev wg2
n0 wg show
[[ $rx_bytes -ge 840 && $tx_bytes -ge 880 && $rx_bytes -lt 2500 && $rx_bytes -lt 2500 ]]
echo "counters working"
tests
ip1 link set wg1 mtu $big_mtu
ip2 link set wg2 mtu $big_mtu
tests
ip1 link set wg1 mtu $orig_mtu
ip2 link set wg2 mtu $orig_mtu
# Test using IPv6 as outer transport
n0 wg set wg1 peer "$pub2" endpoint [::1]:20000
n0 wg set wg2 peer "$pub1" endpoint [::1]:10000
tests
ip1 link set wg1 mtu $big_mtu
ip2 link set wg2 mtu $big_mtu
tests
ip1 link set wg1 mtu $orig_mtu
ip2 link set wg2 mtu $orig_mtu
# Test using IPv4 that roaming works
ip0 -4 addr del 127.0.0.1/8 dev lo
ip0 -4 addr add 127.212.121.99/8 dev lo
n0 wg set wg1 listen-port 9999
n0 wg set wg1 peer "$pub2" endpoint 127.0.0.1:20000
n1 ping6 -W 1 -c 1 fd00::2
[[ $(n2 wg show wg2 endpoints) == "$pub1 127.212.121.99:9999" ]]
# Test using IPv6 that roaming works
n1 wg set wg1 listen-port 9998
n1 wg set wg1 peer "$pub2" endpoint [::1]:20000
n1 ping -W 1 -c 1 192.168.241.2
[[ $(n2 wg show wg2 endpoints) == "$pub1 [::1]:9998" ]]
# Test that crypto-RP filter works
n1 wg set wg1 peer "$pub2" allowed-ips 192.168.241.0/24
exec 4< <(n1 ncat -l -u -p 1111)
nmap_pid=$!
waitncatudp $netns1
n2 ncat -u 192.168.241.1 1111 <<<"X"
read -r -N 1 -t 1 out <&4 && [[ $out == "X" ]]
kill $nmap_pid
more_specific_key="$(pp wg genkey | pp wg pubkey)"
n0 wg set wg1 peer "$more_specific_key" allowed-ips 192.168.241.2/32
n0 wg set wg2 listen-port 9997
exec 4< <(n1 ncat -l -u -p 1111)
nmap_pid=$!
waitncatudp $netns1
n2 ncat -u 192.168.241.1 1111 <<<"X"
! read -r -N 1 -t 1 out <&4
kill $nmap_pid
n0 wg set wg1 peer "$more_specific_key" remove
[[ $(n1 wg show wg1 endpoints) == "$pub2 [::1]:9997" ]]
ip1 link del wg1
ip2 link del wg2
# Test using NAT. We now change the topology to this:
# ┌────────────────────────────────────────┐ ┌────────────────────────────────────────────────┐ ┌────────────────────────────────────────┐
# │ $ns1 namespace │ │ $ns0 namespace │ │ $ns2 namespace │
# │ │ │ │ │ │
# │ ┌─────┐ ┌─────┐ │ │ ┌──────┐ ┌──────┐ │ │ ┌─────┐ ┌─────┐ │
# │ │ wg1 │─────────────│vethc│───────────┼────┼────│vethrc│ │vethrs│──────────────┼─────┼──│veths│────────────│ wg2 │ │
# │ ├─────┴──────────┐ ├─────┴──────────┐│ │ ├──────┴─────────┐ ├──────┴────────────┐ │ │ ├─────┴──────────┐ ├─────┴──────────┐ │
# │ │192.168.241.1/24│ │192.168.1.100/24││ │ │192.168.1.100/24│ │10.0.0.1/24 │ │ │ │10.0.0.100/24 │ │192.168.241.2/24│ │
# │ │fd00::1/24 │ │ ││ │ │ │ │SNAT:192.168.1.0/24│ │ │ │ │ │fd00::2/24 │ │
# │ └────────────────┘ └────────────────┘│ │ └────────────────┘ └───────────────────┘ │ │ └────────────────┘ └────────────────┘ │
# └────────────────────────────────────────┘ └────────────────────────────────────────────────┘ └────────────────────────────────────────┘
# ip1 link add dev wg1 type wireguard
# ip2 link add dev wg1 type wireguard
n1 $program wg1
n2 $program wg2
configure_peers
ip0 link add vethrc type veth peer name vethc
ip0 link add vethrs type veth peer name veths
ip0 link set vethc netns $netns1
ip0 link set veths netns $netns2
ip0 link set vethrc up
ip0 link set vethrs up
ip0 addr add 192.168.1.1/24 dev vethrc
ip0 addr add 10.0.0.1/24 dev vethrs
ip1 addr add 192.168.1.100/24 dev vethc
ip1 link set vethc up
ip1 route add default via 192.168.1.1
ip2 addr add 10.0.0.100/24 dev veths
ip2 link set veths up
waitiface $netns0 vethrc
waitiface $netns0 vethrs
waitiface $netns1 vethc
waitiface $netns2 veths
n0 bash -c 'printf 1 > /proc/sys/net/ipv4/ip_forward'
n0 bash -c 'printf 2 > /proc/sys/net/netfilter/nf_conntrack_udp_timeout'
n0 bash -c 'printf 2 > /proc/sys/net/netfilter/nf_conntrack_udp_timeout_stream'
n0 iptables -t nat -A POSTROUTING -s 192.168.1.0/24 -d 10.0.0.0/24 -j SNAT --to 10.0.0.1
n0 wg set wg1 peer "$pub2" endpoint 10.0.0.100:20000 persistent-keepalive 1
n1 ping -W 1 -c 1 192.168.241.2
n2 ping -W 1 -c 1 192.168.241.1
[[ $(n2 wg show wg2 endpoints) == "$pub1 10.0.0.1:10000" ]]
# Demonstrate n2 can still send packets to n1, since persistent-keepalive will prevent connection tracking entry from expiring (to see entries: `n0 conntrack -L`).
pp sleep 3
n2 ping -W 1 -c 1 192.168.241.1
n0 iptables -t nat -F
ip0 link del vethrc
ip0 link del vethrs
ip1 link del wg1
ip2 link del wg2
# Test that saddr routing is sticky but not too sticky, changing to this topology:
# ┌────────────────────────────────────────┐ ┌────────────────────────────────────────┐
# │ $ns1 namespace │ │ $ns2 namespace │
# │ │ │ │
# │ ┌─────┐ ┌─────┐ │ │ ┌─────┐ ┌─────┐ │
# │ │ wg1 │─────────────│veth1│───────────┼────┼──│veth2│────────────│ wg2 │ │
# │ ├─────┴──────────┐ ├─────┴──────────┐│ │ ├─────┴──────────┐ ├─────┴──────────┐ │
# │ │192.168.241.1/24│ │10.0.0.1/24 ││ │ │10.0.0.2/24 │ │192.168.241.2/24│ │
# │ │fd00::1/24 │ │fd00:aa::1/96 ││ │ │fd00:aa::2/96 │ │fd00::2/24 │ │
# │ └────────────────┘ └────────────────┘│ │ └────────────────┘ └────────────────┘ │
# └────────────────────────────────────────┘ └────────────────────────────────────────┘
# ip1 link add dev wg1 type wireguard
# ip2 link add dev wg1 type wireguard
n1 $program wg1
n2 $program wg2
configure_peers
ip1 link add veth1 type veth peer name veth2
ip1 link set veth2 netns $netns2
n1 bash -c 'printf 0 > /proc/sys/net/ipv6/conf/veth1/accept_dad'
n2 bash -c 'printf 0 > /proc/sys/net/ipv6/conf/veth2/accept_dad'
n1 bash -c 'printf 1 > /proc/sys/net/ipv4/conf/veth1/promote_secondaries'
# First we check that we aren't overly sticky and can fall over to new IPs when old ones are removed
ip1 addr add 10.0.0.1/24 dev veth1
ip1 addr add fd00:aa::1/96 dev veth1
ip2 addr add 10.0.0.2/24 dev veth2
ip2 addr add fd00:aa::2/96 dev veth2
ip1 link set veth1 up
ip2 link set veth2 up
waitiface $netns1 veth1
waitiface $netns2 veth2
n0 wg set wg1 peer "$pub2" endpoint 10.0.0.2:20000
n1 ping -W 1 -c 1 192.168.241.2
ip1 addr add 10.0.0.10/24 dev veth1
ip1 addr del 10.0.0.1/24 dev veth1
n1 ping -W 1 -c 1 192.168.241.2
n0 wg set wg1 peer "$pub2" endpoint [fd00:aa::2]:20000
n1 ping -W 1 -c 1 192.168.241.2
ip1 addr add fd00:aa::10/96 dev veth1
ip1 addr del fd00:aa::1/96 dev veth1
n1 ping -W 1 -c 1 192.168.241.2
# Now we show that we can successfully do reply to sender routing
ip1 link set veth1 down
ip2 link set veth2 down
ip1 addr flush dev veth1
ip2 addr flush dev veth2
ip1 addr add 10.0.0.1/24 dev veth1
ip1 addr add 10.0.0.2/24 dev veth1
ip1 addr add fd00:aa::1/96 dev veth1
ip1 addr add fd00:aa::2/96 dev veth1
ip2 addr add 10.0.0.3/24 dev veth2
ip2 addr add fd00:aa::3/96 dev veth2
ip1 link set veth1 up
ip2 link set veth2 up
waitiface $netns1 veth1
waitiface $netns2 veth2
n0 wg set wg2 peer "$pub1" endpoint 10.0.0.1:10000
n2 ping -W 1 -c 1 192.168.241.1
[[ $(n0 wg show wg2 endpoints) == "$pub1 10.0.0.1:10000" ]]
n0 wg set wg2 peer "$pub1" endpoint [fd00:aa::1]:10000
n2 ping -W 1 -c 1 192.168.241.1
[[ $(n0 wg show wg2 endpoints) == "$pub1 [fd00:aa::1]:10000" ]]
n0 wg set wg2 peer "$pub1" endpoint 10.0.0.2:10000
n2 ping -W 1 -c 1 192.168.241.1
[[ $(n0 wg show wg2 endpoints) == "$pub1 10.0.0.2:10000" ]]
n0 wg set wg2 peer "$pub1" endpoint [fd00:aa::2]:10000
n2 ping -W 1 -c 1 192.168.241.1
[[ $(n0 wg show wg2 endpoints) == "$pub1 [fd00:aa::2]:10000" ]]
ip1 link del veth1
ip1 link del wg1
ip2 link del wg2
# Test that Netlink/IPC is working properly by doing things that usually cause split responses
n0 $program wg0
sleep 5
config=( "[Interface]" "PrivateKey=$(wg genkey)" "[Peer]" "PublicKey=$(wg genkey)" )
for a in {1..255}; do
for b in {0..255}; do
config+=( "AllowedIPs=$a.$b.0.0/16,$a::$b/128" )
done
done
n0 wg setconf wg0 <(printf '%s\n' "${config[@]}")
i=0
for ip in $(n0 wg show wg0 allowed-ips); do
((++i))
done
((i == 255*256*2+1))
ip0 link del wg0
n0 $program wg0
config=( "[Interface]" "PrivateKey=$(wg genkey)" )
for a in {1..40}; do
config+=( "[Peer]" "PublicKey=$(wg genkey)" )
for b in {1..52}; do
config+=( "AllowedIPs=$a.$b.0.0/16" )
done
done
n0 wg setconf wg0 <(printf '%s\n' "${config[@]}")
i=0
while read -r line; do
j=0
for ip in $line; do
((++j))
done
((j == 53))
((++i))
done < <(n0 wg show wg0 allowed-ips)
((i == 40))
ip0 link del wg0
n0 $program wg0
config=( )
for i in {1..29}; do
config+=( "[Peer]" "PublicKey=$(wg genkey)" )
done
config+=( "[Peer]" "PublicKey=$(wg genkey)" "AllowedIPs=255.2.3.4/32,abcd::255/128" )
n0 wg setconf wg0 <(printf '%s\n' "${config[@]}")
n0 wg showconf wg0 > /dev/null
ip0 link del wg0
! n0 wg show doesnotexist || false
declare -A objects
while read -t 0.1 -r line 2>/dev/null || [[ $? -ne 142 ]]; do
[[ $line =~ .*(wg[0-9]+:\ [A-Z][a-z]+\ [0-9]+)\ .*(created|destroyed).* ]] || continue
objects["${BASH_REMATCH[1]}"]+="${BASH_REMATCH[2]}"
done < /dev/kmsg
alldeleted=1
for object in "${!objects[@]}"; do
if [[ ${objects["$object"]} != *createddestroyed ]]; then
echo "Error: $object: merely ${objects["$object"]}" >&3
alldeleted=0
fi
done
[[ $alldeleted -eq 1 ]]
pretty "" "Objects that were created were also destroyed."

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@ -1,67 +0,0 @@
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
*/
package tun
import (
"reflect"
"testing"
"unsafe"
)
func checkAlignment(t *testing.T, name string, offset uintptr) {
t.Helper()
if offset%8 != 0 {
t.Errorf("offset of %q within struct is %d bytes, which does not align to 64-bit word boundaries (missing %d bytes). Atomic operations will crash on 32-bit systems.", name, offset, 8-(offset%8))
}
}
// TestRateJugglerAlignment checks that atomically-accessed fields are
// aligned to 64-bit boundaries, as required by the atomic package.
//
// Unfortunately, violating this rule on 32-bit platforms results in a
// hard segfault at runtime.
func TestRateJugglerAlignment(t *testing.T) {
var r rateJuggler
typ := reflect.TypeOf(&r).Elem()
t.Logf("Peer type size: %d, with fields:", typ.Size())
for i := 0; i < typ.NumField(); i++ {
field := typ.Field(i)
t.Logf("\t%30s\toffset=%3v\t(type size=%3d, align=%d)",
field.Name,
field.Offset,
field.Type.Size(),
field.Type.Align(),
)
}
checkAlignment(t, "rateJuggler.current", unsafe.Offsetof(r.current))
checkAlignment(t, "rateJuggler.nextByteCount", unsafe.Offsetof(r.nextByteCount))
checkAlignment(t, "rateJuggler.nextStartTime", unsafe.Offsetof(r.nextStartTime))
}
// TestNativeTunAlignment checks that atomically-accessed fields are
// aligned to 64-bit boundaries, as required by the atomic package.
//
// Unfortunately, violating this rule on 32-bit platforms results in a
// hard segfault at runtime.
func TestNativeTunAlignment(t *testing.T) {
var tun NativeTun
typ := reflect.TypeOf(&tun).Elem()
t.Logf("Peer type size: %d, with fields:", typ.Size())
for i := 0; i < typ.NumField(); i++ {
field := typ.Field(i)
t.Logf("\t%30s\toffset=%3v\t(type size=%3d, align=%d)",
field.Name,
field.Offset,
field.Type.Size(),
field.Type.Align(),
)
}
checkAlignment(t, "NativeTun.rate", unsafe.Offsetof(tun.rate))
}

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@ -1,54 +0,0 @@
// +build ignore
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2019-2021 WireGuard LLC. All Rights Reserved.
*/
package main
import (
"io"
"log"
"net"
"net/http"
"github.com/KusakabeSi/EtherGuardVPN/conn"
"github.com/KusakabeSi/EtherGuardVPN/device"
"github.com/KusakabeSi/EtherGuardVPN/tun/netstack"
)
func main() {
tun, tnet, err := netstack.CreateNetTUN(
[]net.IP{net.ParseIP("192.168.4.29")},
[]net.IP{net.ParseIP("8.8.8.8")},
1420)
if err != nil {
log.Panic(err)
}
dev := device.NewDevice(tun, conn.NewDefaultBind(), device.NewLogger(device.LogLevelVerbose, ""))
dev.IpcSet(`private_key=a8dac1d8a70a751f0f699fb14ba1cff7b79cf4fbd8f09f44c6e6a90d0369604f
public_key=25123c5dcd3328ff645e4f2a3fce0d754400d3887a0cb7c56f0267e20fbf3c5b
endpoint=163.172.161.0:12912
allowed_ip=0.0.0.0/0
`)
err = dev.Up()
if err != nil {
log.Panic(err)
}
client := http.Client{
Transport: &http.Transport{
DialContext: tnet.DialContext,
},
}
resp, err := client.Get("https://www.zx2c4.com/ip")
if err != nil {
log.Panic(err)
}
body, err := io.ReadAll(resp.Body)
if err != nil {
log.Panic(err)
}
log.Println(string(body))
}

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@ -1,50 +0,0 @@
// +build ignore
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2019-2021 WireGuard LLC. All Rights Reserved.
*/
package main
import (
"io"
"log"
"net"
"net/http"
"github.com/KusakabeSi/EtherGuardVPN/conn"
"github.com/KusakabeSi/EtherGuardVPN/device"
"github.com/KusakabeSi/EtherGuardVPN/tun/netstack"
)
func main() {
tun, tnet, err := netstack.CreateNetTUN(
[]net.IP{net.ParseIP("192.168.4.29")},
[]net.IP{net.ParseIP("8.8.8.8"), net.ParseIP("8.8.4.4")},
1420,
)
if err != nil {
log.Panic(err)
}
dev := device.NewDevice(tun, conn.NewDefaultBind(), device.NewLogger(device.LogLevelVerbose, ""))
dev.IpcSet(`private_key=a8dac1d8a70a751f0f699fb14ba1cff7b79cf4fbd8f09f44c6e6a90d0369604f
public_key=25123c5dcd3328ff645e4f2a3fce0d754400d3887a0cb7c56f0267e20fbf3c5b
endpoint=163.172.161.0:12912
allowed_ip=0.0.0.0/0
persistent_keepalive_interval=25
`)
dev.Up()
listener, err := tnet.ListenTCP(&net.TCPAddr{Port: 80})
if err != nil {
log.Panicln(err)
}
http.HandleFunc("/", func(writer http.ResponseWriter, request *http.Request) {
log.Printf("> %s - %s - %s", request.RemoteAddr, request.URL.String(), request.UserAgent())
io.WriteString(writer, "Hello from userspace TCP!")
})
err = http.Serve(listener, nil)
if err != nil {
log.Panicln(err)
}
}

View File

@ -1,11 +0,0 @@
module golang.zx2c4.com/wireguard/tun/netstack
go 1.16
require (
golang.org/x/net v0.0.0-20210423184538-5f58ad60dda6
golang.org/x/sys v0.0.0-20210423185535-09eb48e85fd7 // indirect
golang.org/x/time v0.0.0-20210220033141-f8bda1e9f3ba // indirect
golang.zx2c4.com/wireguard v0.0.0-20210424170727-c9db4b7aaa22
gvisor.dev/gvisor v0.0.0-20210506004418-fbfeba3024f0
)

View File

@ -1,605 +0,0 @@
bazil.org/fuse v0.0.0-20160811212531-371fbbdaa898/go.mod h1:Xbm+BRKSBEpa4q4hTSxohYNQpsxXPbPry4JJWOB3LB8=
cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
cloud.google.com/go v0.50.0/go.mod h1:r9sluTvynVuxRIOHXQEHMFffphuXHOMZMycpNR5e6To=
cloud.google.com/go v0.52.0/go.mod h1:pXajvRH/6o3+F9jDHZWQ5PbGhn+o8w9qiu/CffaVdO4=
cloud.google.com/go v0.53.0/go.mod h1:fp/UouUEsRkN6ryDKNW/Upv/JBKnv6WDthjR6+vze6M=
cloud.google.com/go v0.54.0/go.mod h1:1rq2OEkV3YMf6n/9ZvGWI3GWw0VoqH/1x2nd8Is/bPc=
cloud.google.com/go v0.56.0/go.mod h1:jr7tqZxxKOVYizybht9+26Z/gUq7tiRzu+ACVAMbKVk=
cloud.google.com/go v0.57.0/go.mod h1:oXiQ6Rzq3RAkkY7N6t3TcE6jE+CIBBbA36lwQ1JyzZs=
cloud.google.com/go v0.62.0/go.mod h1:jmCYTdRCQuc1PHIIJ/maLInMho30T/Y0M4hTdTShOYc=
cloud.google.com/go v0.65.0/go.mod h1:O5N8zS7uWy9vkA9vayVHs65eM1ubvY4h553ofrNHObY=
cloud.google.com/go v0.72.0/go.mod h1:M+5Vjvlc2wnp6tjzE102Dw08nGShTscUx2nZMufOKPI=
cloud.google.com/go v0.75.0/go.mod h1:VGuuCn7PG0dwsd5XPVm2Mm3wlh3EL55/79EKB6hlPTY=
cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
cloud.google.com/go/bigquery v1.3.0/go.mod h1:PjpwJnslEMmckchkHFfq+HTD2DmtT67aNFKH1/VBDHE=
cloud.google.com/go/bigquery v1.4.0/go.mod h1:S8dzgnTigyfTmLBfrtrhyYhwRxG72rYxvftPBK2Dvzc=
cloud.google.com/go/bigquery v1.5.0/go.mod h1:snEHRnqQbz117VIFhE8bmtwIDY80NLUZUMb4Nv6dBIg=
cloud.google.com/go/bigquery v1.7.0/go.mod h1://okPTzCYNXSlb24MZs83e2Do+h+VXtc4gLoIoXIAPc=
cloud.google.com/go/bigquery v1.8.0/go.mod h1:J5hqkt3O0uAFnINi6JXValWIb1v0goeZM77hZzJN/fQ=
cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
cloud.google.com/go/datastore v1.1.0/go.mod h1:umbIZjpQpHh4hmRpGhH4tLFup+FVzqBi1b3c64qFpCk=
cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I=
cloud.google.com/go/pubsub v1.1.0/go.mod h1:EwwdRX2sKPjnvnqCa270oGRyludottCI76h+R3AArQw=
cloud.google.com/go/pubsub v1.2.0/go.mod h1:jhfEVHT8odbXTkndysNHCcx0awwzvfOlguIAii9o8iA=
cloud.google.com/go/pubsub v1.3.1/go.mod h1:i+ucay31+CNRpDW4Lu78I4xXG+O1r/MAHgjpRVR+TSU=
cloud.google.com/go/storage v1.0.0/go.mod h1:IhtSnM/ZTZV8YYJWCY8RULGVqBDmpoyjwiyrjsg+URw=
cloud.google.com/go/storage v1.5.0/go.mod h1:tpKbwo567HUNpVclU5sGELwQWBDZ8gh0ZeosJ0Rtdos=
cloud.google.com/go/storage v1.6.0/go.mod h1:N7U0C8pVQ/+NIKOBQyamJIeKQKkZ+mxpohlUTyfDhBk=
cloud.google.com/go/storage v1.8.0/go.mod h1:Wv1Oy7z6Yz3DshWRJFhqM/UCfaWIRTdp0RXyy7KQOVs=
cloud.google.com/go/storage v1.10.0/go.mod h1:FLPqc6j+Ki4BU591ie1oL6qBQGu2Bl/tZ9ullr3+Kg0=
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golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
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golang.org/x/crypto v0.0.0-20190605123033-f99c8df09eb5/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
golang.org/x/crypto v0.0.0-20200220183623-bac4c82f6975/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
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google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
google.golang.org/genproto v0.0.0-20190911173649-1774047e7e51/go.mod h1:IbNlFCBrqXvoKpeg0TB2l7cyZUmoaFKYIwrEpbDKLA8=
google.golang.org/genproto v0.0.0-20191108220845-16a3f7862a1a/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc=
google.golang.org/genproto v0.0.0-20191115194625-c23dd37a84c9/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc=
google.golang.org/genproto v0.0.0-20191216164720-4f79533eabd1/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc=
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google.golang.org/genproto v0.0.0-20200117163144-32f20d992d24/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc=
google.golang.org/genproto v0.0.0-20200122232147-0452cf42e150/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc=
google.golang.org/genproto v0.0.0-20200204135345-fa8e72b47b90/go.mod h1:GmwEX6Z4W5gMy59cAlVYjN9JhxgbQH6Gn+gFDQe2lzA=
google.golang.org/genproto v0.0.0-20200212174721-66ed5ce911ce/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
google.golang.org/genproto v0.0.0-20200224152610-e50cd9704f63/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
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google.golang.org/genproto v0.0.0-20200305110556-506484158171/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
google.golang.org/genproto v0.0.0-20200312145019-da6875a35672/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
google.golang.org/genproto v0.0.0-20200331122359-1ee6d9798940/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
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View File

@ -1,818 +0,0 @@
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2019-2021 WireGuard LLC. All Rights Reserved.
*/
package netstack
import (
"context"
"crypto/rand"
"encoding/binary"
"errors"
"fmt"
"io"
"net"
"os"
"strconv"
"strings"
"time"
"github.com/KusakabeSi/EtherGuardVPN/tun"
"golang.org/x/net/dns/dnsmessage"
"gvisor.dev/gvisor/pkg/tcpip"
"gvisor.dev/gvisor/pkg/tcpip/adapters/gonet"
"gvisor.dev/gvisor/pkg/tcpip/buffer"
"gvisor.dev/gvisor/pkg/tcpip/header"
"gvisor.dev/gvisor/pkg/tcpip/network/ipv4"
"gvisor.dev/gvisor/pkg/tcpip/network/ipv6"
"gvisor.dev/gvisor/pkg/tcpip/stack"
"gvisor.dev/gvisor/pkg/tcpip/transport/tcp"
"gvisor.dev/gvisor/pkg/tcpip/transport/udp"
)
type netTun struct {
stack *stack.Stack
dispatcher stack.NetworkDispatcher
events chan tun.Event
incomingPacket chan buffer.VectorisedView
mtu int
dnsServers []net.IP
hasV4, hasV6 bool
}
type endpoint netTun
type Net netTun
func (e *endpoint) Attach(dispatcher stack.NetworkDispatcher) {
e.dispatcher = dispatcher
}
func (e *endpoint) IsAttached() bool {
return e.dispatcher != nil
}
func (e *endpoint) MTU() uint32 {
mtu, err := (*netTun)(e).MTU()
if err != nil {
panic(err)
}
return uint32(mtu)
}
func (*endpoint) Capabilities() stack.LinkEndpointCapabilities {
return stack.CapabilityNone
}
func (*endpoint) MaxHeaderLength() uint16 {
return 0
}
func (*endpoint) LinkAddress() tcpip.LinkAddress {
return ""
}
func (*endpoint) Wait() {}
func (e *endpoint) WritePacket(_ stack.RouteInfo, _ tcpip.NetworkProtocolNumber, pkt *stack.PacketBuffer) tcpip.Error {
e.incomingPacket <- buffer.NewVectorisedView(pkt.Size(), pkt.Views())
return nil
}
func (e *endpoint) WritePackets(stack.RouteInfo, stack.PacketBufferList, tcpip.NetworkProtocolNumber) (int, tcpip.Error) {
panic("not implemented")
}
func (*endpoint) ARPHardwareType() header.ARPHardwareType {
return header.ARPHardwareNone
}
func (e *endpoint) AddHeader(tcpip.LinkAddress, tcpip.LinkAddress, tcpip.NetworkProtocolNumber, *stack.PacketBuffer) {
}
func CreateNetTUN(localAddresses, dnsServers []net.IP, mtu int) (tun.Device, *Net, error) {
opts := stack.Options{
NetworkProtocols: []stack.NetworkProtocolFactory{ipv4.NewProtocol, ipv6.NewProtocol},
TransportProtocols: []stack.TransportProtocolFactory{tcp.NewProtocol, udp.NewProtocol},
HandleLocal: true,
}
dev := &netTun{
stack: stack.New(opts),
events: make(chan tun.Event, 10),
incomingPacket: make(chan buffer.VectorisedView),
dnsServers: dnsServers,
mtu: mtu,
}
tcpipErr := dev.stack.CreateNIC(1, (*endpoint)(dev))
if tcpipErr != nil {
return nil, nil, fmt.Errorf("CreateNIC: %v", tcpipErr)
}
for _, ip := range localAddresses {
if ip4 := ip.To4(); ip4 != nil {
tcpipErr = dev.stack.AddAddress(1, ipv4.ProtocolNumber, tcpip.Address(ip4))
if tcpipErr != nil {
return nil, nil, fmt.Errorf("AddAddress(%v): %v", ip4, tcpipErr)
}
dev.hasV4 = true
} else {
tcpipErr = dev.stack.AddAddress(1, ipv6.ProtocolNumber, tcpip.Address(ip))
if tcpipErr != nil {
return nil, nil, fmt.Errorf("AddAddress(%v): %v", ip4, tcpipErr)
}
dev.hasV6 = true
}
}
if dev.hasV4 {
dev.stack.AddRoute(tcpip.Route{Destination: header.IPv4EmptySubnet, NIC: 1})
}
if dev.hasV6 {
dev.stack.AddRoute(tcpip.Route{Destination: header.IPv6EmptySubnet, NIC: 1})
}
dev.events <- tun.EventUp
return dev, (*Net)(dev), nil
}
func (tun *netTun) Name() (string, error) {
return "go", nil
}
func (tun *netTun) File() *os.File {
return nil
}
func (tun *netTun) Events() chan tun.Event {
return tun.events
}
func (tun *netTun) Read(buf []byte, offset int) (int, error) {
view, ok := <-tun.incomingPacket
if !ok {
return 0, os.ErrClosed
}
return view.Read(buf[offset:])
}
func (tun *netTun) Write(buf []byte, offset int) (int, error) {
packet := buf[offset:]
if len(packet) == 0 {
return 0, nil
}
pkb := stack.NewPacketBuffer(stack.PacketBufferOptions{Data: buffer.NewVectorisedView(len(packet), []buffer.View{buffer.NewViewFromBytes(packet)})})
switch packet[0] >> 4 {
case 4:
tun.dispatcher.DeliverNetworkPacket("", "", ipv4.ProtocolNumber, pkb)
case 6:
tun.dispatcher.DeliverNetworkPacket("", "", ipv6.ProtocolNumber, pkb)
}
return len(buf), nil
}
func (tun *netTun) Flush() error {
return nil
}
func (tun *netTun) Close() error {
tun.stack.RemoveNIC(1)
if tun.events != nil {
close(tun.events)
}
if tun.incomingPacket != nil {
close(tun.incomingPacket)
}
return nil
}
func (tun *netTun) MTU() (int, error) {
return tun.mtu, nil
}
func convertToFullAddr(ip net.IP, port int) (tcpip.FullAddress, tcpip.NetworkProtocolNumber) {
if ip4 := ip.To4(); ip4 != nil {
return tcpip.FullAddress{
NIC: 1,
Addr: tcpip.Address(ip4),
Port: uint16(port),
}, ipv4.ProtocolNumber
} else {
return tcpip.FullAddress{
NIC: 1,
Addr: tcpip.Address(ip),
Port: uint16(port),
}, ipv6.ProtocolNumber
}
}
func (net *Net) DialContextTCP(ctx context.Context, addr *net.TCPAddr) (*gonet.TCPConn, error) {
if addr == nil {
panic("todo: deal with auto addr semantics for nil addr")
}
fa, pn := convertToFullAddr(addr.IP, addr.Port)
return gonet.DialContextTCP(ctx, net.stack, fa, pn)
}
func (net *Net) DialTCP(addr *net.TCPAddr) (*gonet.TCPConn, error) {
if addr == nil {
panic("todo: deal with auto addr semantics for nil addr")
}
fa, pn := convertToFullAddr(addr.IP, addr.Port)
return gonet.DialTCP(net.stack, fa, pn)
}
func (net *Net) ListenTCP(addr *net.TCPAddr) (*gonet.TCPListener, error) {
if addr == nil {
panic("todo: deal with auto addr semantics for nil addr")
}
fa, pn := convertToFullAddr(addr.IP, addr.Port)
return gonet.ListenTCP(net.stack, fa, pn)
}
func (net *Net) DialUDP(laddr, raddr *net.UDPAddr) (*gonet.UDPConn, error) {
var lfa, rfa *tcpip.FullAddress
var pn tcpip.NetworkProtocolNumber
if laddr != nil {
var addr tcpip.FullAddress
addr, pn = convertToFullAddr(laddr.IP, laddr.Port)
lfa = &addr
}
if raddr != nil {
var addr tcpip.FullAddress
addr, pn = convertToFullAddr(raddr.IP, raddr.Port)
rfa = &addr
}
return gonet.DialUDP(net.stack, lfa, rfa, pn)
}
var (
errNoSuchHost = errors.New("no such host")
errLameReferral = errors.New("lame referral")
errCannotUnmarshalDNSMessage = errors.New("cannot unmarshal DNS message")
errCannotMarshalDNSMessage = errors.New("cannot marshal DNS message")
errServerMisbehaving = errors.New("server misbehaving")
errInvalidDNSResponse = errors.New("invalid DNS response")
errNoAnswerFromDNSServer = errors.New("no answer from DNS server")
errServerTemporarilyMisbehaving = errors.New("server misbehaving")
errCanceled = errors.New("operation was canceled")
errTimeout = errors.New("i/o timeout")
errNumericPort = errors.New("port must be numeric")
errNoSuitableAddress = errors.New("no suitable address found")
errMissingAddress = errors.New("missing address")
)
func (net *Net) LookupHost(host string) (addrs []string, err error) {
return net.LookupContextHost(context.Background(), host)
}
func isDomainName(s string) bool {
l := len(s)
if l == 0 || l > 254 || l == 254 && s[l-1] != '.' {
return false
}
last := byte('.')
nonNumeric := false
partlen := 0
for i := 0; i < len(s); i++ {
c := s[i]
switch {
default:
return false
case 'a' <= c && c <= 'z' || 'A' <= c && c <= 'Z' || c == '_':
nonNumeric = true
partlen++
case '0' <= c && c <= '9':
partlen++
case c == '-':
if last == '.' {
return false
}
partlen++
nonNumeric = true
case c == '.':
if last == '.' || last == '-' {
return false
}
if partlen > 63 || partlen == 0 {
return false
}
partlen = 0
}
last = c
}
if last == '-' || partlen > 63 {
return false
}
return nonNumeric
}
func randU16() uint16 {
var b [2]byte
_, err := rand.Read(b[:])
if err != nil {
panic(err)
}
return binary.LittleEndian.Uint16(b[:])
}
func newRequest(q dnsmessage.Question) (id uint16, udpReq, tcpReq []byte, err error) {
id = randU16()
b := dnsmessage.NewBuilder(make([]byte, 2, 514), dnsmessage.Header{ID: id, RecursionDesired: true})
b.EnableCompression()
if err := b.StartQuestions(); err != nil {
return 0, nil, nil, err
}
if err := b.Question(q); err != nil {
return 0, nil, nil, err
}
tcpReq, err = b.Finish()
udpReq = tcpReq[2:]
l := len(tcpReq) - 2
tcpReq[0] = byte(l >> 8)
tcpReq[1] = byte(l)
return id, udpReq, tcpReq, err
}
func equalASCIIName(x, y dnsmessage.Name) bool {
if x.Length != y.Length {
return false
}
for i := 0; i < int(x.Length); i++ {
a := x.Data[i]
b := y.Data[i]
if 'A' <= a && a <= 'Z' {
a += 0x20
}
if 'A' <= b && b <= 'Z' {
b += 0x20
}
if a != b {
return false
}
}
return true
}
func checkResponse(reqID uint16, reqQues dnsmessage.Question, respHdr dnsmessage.Header, respQues dnsmessage.Question) bool {
if !respHdr.Response {
return false
}
if reqID != respHdr.ID {
return false
}
if reqQues.Type != respQues.Type || reqQues.Class != respQues.Class || !equalASCIIName(reqQues.Name, respQues.Name) {
return false
}
return true
}
func dnsPacketRoundTrip(c net.Conn, id uint16, query dnsmessage.Question, b []byte) (dnsmessage.Parser, dnsmessage.Header, error) {
if _, err := c.Write(b); err != nil {
return dnsmessage.Parser{}, dnsmessage.Header{}, err
}
b = make([]byte, 512)
for {
n, err := c.Read(b)
if err != nil {
return dnsmessage.Parser{}, dnsmessage.Header{}, err
}
var p dnsmessage.Parser
h, err := p.Start(b[:n])
if err != nil {
continue
}
q, err := p.Question()
if err != nil || !checkResponse(id, query, h, q) {
continue
}
return p, h, nil
}
}
func dnsStreamRoundTrip(c net.Conn, id uint16, query dnsmessage.Question, b []byte) (dnsmessage.Parser, dnsmessage.Header, error) {
if _, err := c.Write(b); err != nil {
return dnsmessage.Parser{}, dnsmessage.Header{}, err
}
b = make([]byte, 1280)
if _, err := io.ReadFull(c, b[:2]); err != nil {
return dnsmessage.Parser{}, dnsmessage.Header{}, err
}
l := int(b[0])<<8 | int(b[1])
if l > len(b) {
b = make([]byte, l)
}
n, err := io.ReadFull(c, b[:l])
if err != nil {
return dnsmessage.Parser{}, dnsmessage.Header{}, err
}
var p dnsmessage.Parser
h, err := p.Start(b[:n])
if err != nil {
return dnsmessage.Parser{}, dnsmessage.Header{}, errCannotUnmarshalDNSMessage
}
q, err := p.Question()
if err != nil {
return dnsmessage.Parser{}, dnsmessage.Header{}, errCannotUnmarshalDNSMessage
}
if !checkResponse(id, query, h, q) {
return dnsmessage.Parser{}, dnsmessage.Header{}, errInvalidDNSResponse
}
return p, h, nil
}
func (tnet *Net) exchange(ctx context.Context, server net.IP, q dnsmessage.Question, timeout time.Duration) (dnsmessage.Parser, dnsmessage.Header, error) {
q.Class = dnsmessage.ClassINET
id, udpReq, tcpReq, err := newRequest(q)
if err != nil {
return dnsmessage.Parser{}, dnsmessage.Header{}, errCannotMarshalDNSMessage
}
for _, useUDP := range []bool{true, false} {
ctx, cancel := context.WithDeadline(ctx, time.Now().Add(timeout))
defer cancel()
var c net.Conn
var err error
if useUDP {
c, err = tnet.DialUDP(nil, &net.UDPAddr{IP: server, Port: 53})
} else {
c, err = tnet.DialContextTCP(ctx, &net.TCPAddr{IP: server, Port: 53})
}
if err != nil {
return dnsmessage.Parser{}, dnsmessage.Header{}, err
}
if d, ok := ctx.Deadline(); ok && !d.IsZero() {
c.SetDeadline(d)
}
var p dnsmessage.Parser
var h dnsmessage.Header
if useUDP {
p, h, err = dnsPacketRoundTrip(c, id, q, udpReq)
} else {
p, h, err = dnsStreamRoundTrip(c, id, q, tcpReq)
}
c.Close()
if err != nil {
if err == context.Canceled {
err = errCanceled
} else if err == context.DeadlineExceeded {
err = errTimeout
}
return dnsmessage.Parser{}, dnsmessage.Header{}, err
}
if err := p.SkipQuestion(); err != dnsmessage.ErrSectionDone {
return dnsmessage.Parser{}, dnsmessage.Header{}, errInvalidDNSResponse
}
if h.Truncated {
continue
}
return p, h, nil
}
return dnsmessage.Parser{}, dnsmessage.Header{}, errNoAnswerFromDNSServer
}
func checkHeader(p *dnsmessage.Parser, h dnsmessage.Header) error {
if h.RCode == dnsmessage.RCodeNameError {
return errNoSuchHost
}
_, err := p.AnswerHeader()
if err != nil && err != dnsmessage.ErrSectionDone {
return errCannotUnmarshalDNSMessage
}
if h.RCode == dnsmessage.RCodeSuccess && !h.Authoritative && !h.RecursionAvailable && err == dnsmessage.ErrSectionDone {
return errLameReferral
}
if h.RCode != dnsmessage.RCodeSuccess && h.RCode != dnsmessage.RCodeNameError {
if h.RCode == dnsmessage.RCodeServerFailure {
return errServerTemporarilyMisbehaving
}
return errServerMisbehaving
}
return nil
}
func skipToAnswer(p *dnsmessage.Parser, qtype dnsmessage.Type) error {
for {
h, err := p.AnswerHeader()
if err == dnsmessage.ErrSectionDone {
return errNoSuchHost
}
if err != nil {
return errCannotUnmarshalDNSMessage
}
if h.Type == qtype {
return nil
}
if err := p.SkipAnswer(); err != nil {
return errCannotUnmarshalDNSMessage
}
}
}
func (tnet *Net) tryOneName(ctx context.Context, name string, qtype dnsmessage.Type) (dnsmessage.Parser, string, error) {
var lastErr error
n, err := dnsmessage.NewName(name)
if err != nil {
return dnsmessage.Parser{}, "", errCannotMarshalDNSMessage
}
q := dnsmessage.Question{
Name: n,
Type: qtype,
Class: dnsmessage.ClassINET,
}
for i := 0; i < 2; i++ {
for _, server := range tnet.dnsServers {
p, h, err := tnet.exchange(ctx, server, q, time.Second*5)
if err != nil {
dnsErr := &net.DNSError{
Err: err.Error(),
Name: name,
Server: server.String(),
}
if nerr, ok := err.(net.Error); ok && nerr.Timeout() {
dnsErr.IsTimeout = true
}
if _, ok := err.(*net.OpError); ok {
dnsErr.IsTemporary = true
}
lastErr = dnsErr
continue
}
if err := checkHeader(&p, h); err != nil {
dnsErr := &net.DNSError{
Err: err.Error(),
Name: name,
Server: server.String(),
}
if err == errServerTemporarilyMisbehaving {
dnsErr.IsTemporary = true
}
if err == errNoSuchHost {
dnsErr.IsNotFound = true
return p, server.String(), dnsErr
}
lastErr = dnsErr
continue
}
err = skipToAnswer(&p, qtype)
if err == nil {
return p, server.String(), nil
}
lastErr = &net.DNSError{
Err: err.Error(),
Name: name,
Server: server.String(),
}
if err == errNoSuchHost {
lastErr.(*net.DNSError).IsNotFound = true
return p, server.String(), lastErr
}
}
}
return dnsmessage.Parser{}, "", lastErr
}
func (tnet *Net) LookupContextHost(ctx context.Context, host string) ([]string, error) {
if host == "" || (!tnet.hasV6 && !tnet.hasV4) {
return nil, &net.DNSError{Err: errNoSuchHost.Error(), Name: host, IsNotFound: true}
}
zlen := len(host)
if strings.IndexByte(host, ':') != -1 {
if zidx := strings.LastIndexByte(host, '%'); zidx != -1 {
zlen = zidx
}
}
if ip := net.ParseIP(host[:zlen]); ip != nil {
return []string{host[:zlen]}, nil
}
if !isDomainName(host) {
return nil, &net.DNSError{Err: errNoSuchHost.Error(), Name: host, IsNotFound: true}
}
type result struct {
p dnsmessage.Parser
server string
error
}
var addrsV4, addrsV6 []net.IP
lanes := 0
if tnet.hasV4 {
lanes++
}
if tnet.hasV6 {
lanes++
}
lane := make(chan result, lanes)
var lastErr error
if tnet.hasV4 {
go func() {
p, server, err := tnet.tryOneName(ctx, host+".", dnsmessage.TypeA)
lane <- result{p, server, err}
}()
}
if tnet.hasV6 {
go func() {
p, server, err := tnet.tryOneName(ctx, host+".", dnsmessage.TypeAAAA)
lane <- result{p, server, err}
}()
}
for l := 0; l < lanes; l++ {
result := <-lane
if result.error != nil {
if lastErr == nil {
lastErr = result.error
}
continue
}
loop:
for {
h, err := result.p.AnswerHeader()
if err != nil && err != dnsmessage.ErrSectionDone {
lastErr = &net.DNSError{
Err: errCannotMarshalDNSMessage.Error(),
Name: host,
Server: result.server,
}
}
if err != nil {
break
}
switch h.Type {
case dnsmessage.TypeA:
a, err := result.p.AResource()
if err != nil {
lastErr = &net.DNSError{
Err: errCannotMarshalDNSMessage.Error(),
Name: host,
Server: result.server,
}
break loop
}
addrsV4 = append(addrsV4, net.IP(a.A[:]))
case dnsmessage.TypeAAAA:
aaaa, err := result.p.AAAAResource()
if err != nil {
lastErr = &net.DNSError{
Err: errCannotMarshalDNSMessage.Error(),
Name: host,
Server: result.server,
}
break loop
}
addrsV6 = append(addrsV6, net.IP(aaaa.AAAA[:]))
default:
if err := result.p.SkipAnswer(); err != nil {
lastErr = &net.DNSError{
Err: errCannotMarshalDNSMessage.Error(),
Name: host,
Server: result.server,
}
break loop
}
continue
}
}
}
// We don't do RFC6724. Instead just put V6 addresess first if an IPv6 address is enabled
var addrs []net.IP
if tnet.hasV6 {
addrs = append(addrsV6, addrsV4...)
} else {
addrs = append(addrsV4, addrsV6...)
}
if len(addrs) == 0 && lastErr != nil {
return nil, lastErr
}
saddrs := make([]string, 0, len(addrs))
for _, ip := range addrs {
saddrs = append(saddrs, ip.String())
}
return saddrs, nil
}
func partialDeadline(now, deadline time.Time, addrsRemaining int) (time.Time, error) {
if deadline.IsZero() {
return deadline, nil
}
timeRemaining := deadline.Sub(now)
if timeRemaining <= 0 {
return time.Time{}, errTimeout
}
timeout := timeRemaining / time.Duration(addrsRemaining)
const saneMinimum = 2 * time.Second
if timeout < saneMinimum {
if timeRemaining < saneMinimum {
timeout = timeRemaining
} else {
timeout = saneMinimum
}
}
return now.Add(timeout), nil
}
func (tnet *Net) DialContext(ctx context.Context, network, address string) (net.Conn, error) {
if ctx == nil {
panic("nil context")
}
var acceptV4, acceptV6, useUDP bool
if len(network) == 3 {
acceptV4 = true
acceptV6 = true
} else if len(network) == 4 {
acceptV4 = network[3] == '4'
acceptV6 = network[3] == '6'
}
if !acceptV4 && !acceptV6 {
return nil, &net.OpError{Op: "dial", Err: net.UnknownNetworkError(network)}
}
if network[:3] == "udp" {
useUDP = true
} else if network[:3] != "tcp" {
return nil, &net.OpError{Op: "dial", Err: net.UnknownNetworkError(network)}
}
host, sport, err := net.SplitHostPort(address)
if err != nil {
return nil, &net.OpError{Op: "dial", Err: err}
}
port, err := strconv.Atoi(sport)
if err != nil || port < 0 || port > 65535 {
return nil, &net.OpError{Op: "dial", Err: errNumericPort}
}
allAddr, err := tnet.LookupContextHost(ctx, host)
if err != nil {
return nil, &net.OpError{Op: "dial", Err: err}
}
var addrs []net.IP
for _, addr := range allAddr {
if strings.IndexByte(addr, ':') != -1 && acceptV6 {
addrs = append(addrs, net.ParseIP(addr))
} else if strings.IndexByte(addr, '.') != -1 && acceptV4 {
addrs = append(addrs, net.ParseIP(addr))
}
}
if len(addrs) == 0 && len(allAddr) != 0 {
return nil, &net.OpError{Op: "dial", Err: errNoSuitableAddress}
}
var firstErr error
for i, addr := range addrs {
select {
case <-ctx.Done():
err := ctx.Err()
if err == context.Canceled {
err = errCanceled
} else if err == context.DeadlineExceeded {
err = errTimeout
}
return nil, &net.OpError{Op: "dial", Err: err}
default:
}
dialCtx := ctx
if deadline, hasDeadline := ctx.Deadline(); hasDeadline {
partialDeadline, err := partialDeadline(time.Now(), deadline, len(addrs)-i)
if err != nil {
if firstErr == nil {
firstErr = &net.OpError{Op: "dial", Err: err}
}
break
}
if partialDeadline.Before(deadline) {
var cancel context.CancelFunc
dialCtx, cancel = context.WithDeadline(ctx, partialDeadline)
defer cancel()
}
}
var c net.Conn
if useUDP {
c, err = tnet.DialUDP(nil, &net.UDPAddr{IP: addr, Port: port})
} else {
c, err = tnet.DialContextTCP(dialCtx, &net.TCPAddr{IP: addr, Port: port})
}
if err == nil {
return c, nil
}
if firstErr == nil {
firstErr = err
}
}
if firstErr == nil {
firstErr = &net.OpError{Op: "dial", Err: errMissingAddress}
}
return nil, firstErr
}
func (tnet *Net) Dial(network, address string) (net.Conn, error) {
return tnet.DialContext(context.Background(), network, address)
}

View File

@ -1,24 +0,0 @@
// +build !windows
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
*/
package tun
import (
"fmt"
)
func (tun *NativeTun) operateOnFd(fn func(fd uintptr)) {
sysconn, err := tun.tunFile.SyscallConn()
if err != nil {
tun.errors <- fmt.Errorf("unable to find sysconn for tunfile: %s", err.Error())
return
}
err = sysconn.Control(fn)
if err != nil {
tun.errors <- fmt.Errorf("unable to control sysconn for tunfile: %s", err.Error())
}
}

View File

@ -1,29 +0,0 @@
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
*/
package tun
import (
"os"
)
type Event int
const (
EventUp = 1 << iota
EventDown
EventMTUUpdate
)
type Device interface {
File() *os.File // returns the file descriptor of the device
Read([]byte, int) (int, error) // read a packet from the device (without any additional headers)
Write([]byte, int) (int, error) // writes a packet to the device (without any additional headers)
Flush() error // flush all previous writes to the device
MTU() (int, error) // returns the MTU of the device
Name() (string, error) // fetches and returns the current name
Events() chan Event // returns a constant channel of events related to the device
Close() error // stops the device and closes the event channel
}

View File

@ -1,320 +0,0 @@
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
*/
package tun
import (
"errors"
"fmt"
"net"
"os"
"sync"
"syscall"
"time"
"unsafe"
"golang.org/x/net/ipv6"
"golang.org/x/sys/unix"
)
const utunControlName = "com.apple.net.utun_control"
type NativeTun struct {
name string
tunFile *os.File
events chan Event
errors chan error
routeSocket int
closeOnce sync.Once
}
func retryInterfaceByIndex(index int) (iface *net.Interface, err error) {
for i := 0; i < 20; i++ {
iface, err = net.InterfaceByIndex(index)
if err != nil && errors.Is(err, syscall.ENOMEM) {
time.Sleep(time.Duration(i) * time.Second / 3)
continue
}
return iface, err
}
return nil, err
}
func (tun *NativeTun) routineRouteListener(tunIfindex int) {
var (
statusUp bool
statusMTU int
)
defer close(tun.events)
data := make([]byte, os.Getpagesize())
for {
retry:
n, err := unix.Read(tun.routeSocket, data)
if err != nil {
if errno, ok := err.(syscall.Errno); ok && errno == syscall.EINTR {
goto retry
}
tun.errors <- err
return
}
if n < 14 {
continue
}
if data[3 /* type */] != unix.RTM_IFINFO {
continue
}
ifindex := int(*(*uint16)(unsafe.Pointer(&data[12 /* ifindex */])))
if ifindex != tunIfindex {
continue
}
iface, err := retryInterfaceByIndex(ifindex)
if err != nil {
tun.errors <- err
return
}
// Up / Down event
up := (iface.Flags & net.FlagUp) != 0
if up != statusUp && up {
tun.events <- EventUp
}
if up != statusUp && !up {
tun.events <- EventDown
}
statusUp = up
// MTU changes
if iface.MTU != statusMTU {
tun.events <- EventMTUUpdate
}
statusMTU = iface.MTU
}
}
func CreateTUN(name string, mtu int) (Device, error) {
ifIndex := -1
if name != "utun" {
_, err := fmt.Sscanf(name, "utun%d", &ifIndex)
if err != nil || ifIndex < 0 {
return nil, fmt.Errorf("Interface name must be utun[0-9]*")
}
}
fd, err := unix.Socket(unix.AF_SYSTEM, unix.SOCK_DGRAM, 2)
if err != nil {
return nil, err
}
ctlInfo := &unix.CtlInfo{}
copy(ctlInfo.Name[:], []byte(utunControlName))
err = unix.IoctlCtlInfo(fd, ctlInfo)
if err != nil {
return nil, fmt.Errorf("IoctlGetCtlInfo: %w", err)
}
sc := &unix.SockaddrCtl{
ID: ctlInfo.Id,
Unit: uint32(ifIndex) + 1,
}
err = unix.Connect(fd, sc)
if err != nil {
return nil, err
}
err = syscall.SetNonblock(fd, true)
if err != nil {
return nil, err
}
tun, err := CreateTUNFromFile(os.NewFile(uintptr(fd), ""), mtu)
if err == nil && name == "utun" {
fname := os.Getenv("WG_TUN_NAME_FILE")
if fname != "" {
os.WriteFile(fname, []byte(tun.(*NativeTun).name+"\n"), 0400)
}
}
return tun, err
}
func CreateTUNFromFile(file *os.File, mtu int) (Device, error) {
tun := &NativeTun{
tunFile: file,
events: make(chan Event, 10),
errors: make(chan error, 5),
}
name, err := tun.Name()
if err != nil {
tun.tunFile.Close()
return nil, err
}
tunIfindex, err := func() (int, error) {
iface, err := net.InterfaceByName(name)
if err != nil {
return -1, err
}
return iface.Index, nil
}()
if err != nil {
tun.tunFile.Close()
return nil, err
}
tun.routeSocket, err = unix.Socket(unix.AF_ROUTE, unix.SOCK_RAW, unix.AF_UNSPEC)
if err != nil {
tun.tunFile.Close()
return nil, err
}
go tun.routineRouteListener(tunIfindex)
if mtu > 0 {
err = tun.setMTU(mtu)
if err != nil {
tun.Close()
return nil, err
}
}
return tun, nil
}
func (tun *NativeTun) Name() (string, error) {
var err error
tun.operateOnFd(func(fd uintptr) {
tun.name, err = unix.GetsockoptString(
int(fd),
2, /* #define SYSPROTO_CONTROL 2 */
2, /* #define UTUN_OPT_IFNAME 2 */
)
})
if err != nil {
return "", fmt.Errorf("GetSockoptString: %w", err)
}
return tun.name, nil
}
func (tun *NativeTun) File() *os.File {
return tun.tunFile
}
func (tun *NativeTun) Events() chan Event {
return tun.events
}
func (tun *NativeTun) Read(buff []byte, offset int) (int, error) {
select {
case err := <-tun.errors:
return 0, err
default:
buff := buff[offset-4:]
n, err := tun.tunFile.Read(buff[:])
if n < 4 {
return 0, err
}
return n - 4, err
}
}
func (tun *NativeTun) Write(buff []byte, offset int) (int, error) {
// reserve space for header
buff = buff[offset-4:]
// add packet information header
buff[0] = 0x00
buff[1] = 0x00
buff[2] = 0x00
if buff[4]>>4 == ipv6.Version {
buff[3] = unix.AF_INET6
} else {
buff[3] = unix.AF_INET
}
// write
return tun.tunFile.Write(buff)
}
func (tun *NativeTun) Flush() error {
// TODO: can flushing be implemented by buffering and using sendmmsg?
return nil
}
func (tun *NativeTun) Close() error {
var err1, err2 error
tun.closeOnce.Do(func() {
err1 = tun.tunFile.Close()
if tun.routeSocket != -1 {
unix.Shutdown(tun.routeSocket, unix.SHUT_RDWR)
err2 = unix.Close(tun.routeSocket)
} else if tun.events != nil {
close(tun.events)
}
})
if err1 != nil {
return err1
}
return err2
}
func (tun *NativeTun) setMTU(n int) error {
fd, err := unix.Socket(
unix.AF_INET,
unix.SOCK_DGRAM,
0,
)
if err != nil {
return err
}
defer unix.Close(fd)
var ifr unix.IfreqMTU
copy(ifr.Name[:], tun.name)
ifr.MTU = int32(n)
err = unix.IoctlSetIfreqMTU(fd, &ifr)
if err != nil {
return fmt.Errorf("failed to set MTU on %s: %w", tun.name, err)
}
return nil
}
func (tun *NativeTun) MTU() (int, error) {
fd, err := unix.Socket(
unix.AF_INET,
unix.SOCK_DGRAM,
0,
)
if err != nil {
return 0, err
}
defer unix.Close(fd)
ifr, err := unix.IoctlGetIfreqMTU(fd, tun.name)
if err != nil {
return 0, fmt.Errorf("failed to get MTU on %s: %w", tun.name, err)
}
return int(ifr.MTU), nil
}

View File

@ -1,430 +0,0 @@
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
*/
package tun
import (
"errors"
"fmt"
"io"
"net"
"os"
"sync"
"syscall"
"unsafe"
"golang.org/x/sys/unix"
)
const (
_TUNSIFHEAD = 0x80047460
_TUNSIFMODE = 0x8004745e
_TUNGIFNAME = 0x4020745d
_TUNSIFPID = 0x2000745f
_SIOCGIFINFO_IN6 = 0xc048696c
_SIOCSIFINFO_IN6 = 0xc048696d
_ND6_IFF_AUTO_LINKLOCAL = 0x20
_ND6_IFF_NO_DAD = 0x100
)
// Iface requests with just the name
type ifreqName struct {
Name [unix.IFNAMSIZ]byte
_ [16]byte
}
// Iface requests with a pointer
type ifreqPtr struct {
Name [unix.IFNAMSIZ]byte
Data uintptr
_ [16 - unsafe.Sizeof(uintptr(0))]byte
}
// Iface requests with MTU
type ifreqMtu struct {
Name [unix.IFNAMSIZ]byte
MTU uint32
_ [12]byte
}
// ND6 flag manipulation
type nd6Req struct {
Name [unix.IFNAMSIZ]byte
Linkmtu uint32
Maxmtu uint32
Basereachable uint32
Reachable uint32
Retrans uint32
Flags uint32
Recalctm int
Chlim uint8
Initialized uint8
Randomseed0 [8]byte
Randomseed1 [8]byte
Randomid [8]byte
}
type NativeTun struct {
name string
tunFile *os.File
events chan Event
errors chan error
routeSocket int
closeOnce sync.Once
}
func (tun *NativeTun) routineRouteListener(tunIfindex int) {
var (
statusUp bool
statusMTU int
)
defer close(tun.events)
data := make([]byte, os.Getpagesize())
for {
retry:
n, err := unix.Read(tun.routeSocket, data)
if err != nil {
if errors.Is(err, syscall.EINTR) {
goto retry
}
tun.errors <- err
return
}
if n < 14 {
continue
}
if data[3 /* type */] != unix.RTM_IFINFO {
continue
}
ifindex := int(*(*uint16)(unsafe.Pointer(&data[12 /* ifindex */])))
if ifindex != tunIfindex {
continue
}
iface, err := net.InterfaceByIndex(ifindex)
if err != nil {
tun.errors <- err
return
}
// Up / Down event
up := (iface.Flags & net.FlagUp) != 0
if up != statusUp && up {
tun.events <- EventUp
}
if up != statusUp && !up {
tun.events <- EventDown
}
statusUp = up
// MTU changes
if iface.MTU != statusMTU {
tun.events <- EventMTUUpdate
}
statusMTU = iface.MTU
}
}
func tunName(fd uintptr) (string, error) {
var ifreq ifreqName
_, _, err := unix.Syscall(unix.SYS_IOCTL, fd, _TUNGIFNAME, uintptr(unsafe.Pointer(&ifreq)))
if err != 0 {
return "", err
}
return unix.ByteSliceToString(ifreq.Name[:]), nil
}
// Destroy a named system interface
func tunDestroy(name string) error {
fd, err := unix.Socket(unix.AF_INET, unix.SOCK_DGRAM, 0)
if err != nil {
return err
}
defer unix.Close(fd)
var ifr [32]byte
copy(ifr[:], name)
_, _, errno := unix.Syscall(unix.SYS_IOCTL, uintptr(fd), uintptr(unix.SIOCIFDESTROY), uintptr(unsafe.Pointer(&ifr[0])))
if errno != 0 {
return fmt.Errorf("failed to destroy interface %s: %w", name, errno)
}
return nil
}
func CreateTUN(name string, mtu int) (Device, error) {
if len(name) > unix.IFNAMSIZ-1 {
return nil, errors.New("interface name too long")
}
// See if interface already exists
iface, _ := net.InterfaceByName(name)
if iface != nil {
return nil, fmt.Errorf("interface %s already exists", name)
}
tunFile, err := os.OpenFile("/dev/tun", unix.O_RDWR, 0)
if err != nil {
return nil, err
}
tun := NativeTun{tunFile: tunFile}
var assignedName string
tun.operateOnFd(func(fd uintptr) {
assignedName, err = tunName(fd)
})
if err != nil {
tunFile.Close()
return nil, err
}
// Enable ifhead mode, otherwise tun will complain if it gets a non-AF_INET packet
ifheadmode := 1
var errno syscall.Errno
tun.operateOnFd(func(fd uintptr) {
_, _, errno = unix.Syscall(unix.SYS_IOCTL, fd, _TUNSIFHEAD, uintptr(unsafe.Pointer(&ifheadmode)))
})
if errno != 0 {
tunFile.Close()
tunDestroy(assignedName)
return nil, fmt.Errorf("unable to put into IFHEAD mode: %w", errno)
}
// Get out of PTP mode.
ifflags := syscall.IFF_BROADCAST | syscall.IFF_MULTICAST
tun.operateOnFd(func(fd uintptr) {
_, _, errno = unix.Syscall(unix.SYS_IOCTL, fd, uintptr(_TUNSIFMODE), uintptr(unsafe.Pointer(&ifflags)))
})
if errno != 0 {
tunFile.Close()
tunDestroy(assignedName)
return nil, fmt.Errorf("unable to put into IFF_BROADCAST mode: %w", errno)
}
// Disable link-local v6, not just because WireGuard doesn't do that anyway, but
// also because there are serious races with attaching and detaching LLv6 addresses
// in relation to interface lifetime within the FreeBSD kernel.
confd6, err := unix.Socket(unix.AF_INET6, unix.SOCK_DGRAM, 0)
if err != nil {
tunFile.Close()
tunDestroy(assignedName)
return nil, err
}
defer unix.Close(confd6)
var ndireq nd6Req
copy(ndireq.Name[:], assignedName)
_, _, errno = unix.Syscall(unix.SYS_IOCTL, uintptr(confd6), uintptr(_SIOCGIFINFO_IN6), uintptr(unsafe.Pointer(&ndireq)))
if errno != 0 {
tunFile.Close()
tunDestroy(assignedName)
return nil, fmt.Errorf("unable to get nd6 flags for %s: %w", assignedName, errno)
}
ndireq.Flags = ndireq.Flags &^ _ND6_IFF_AUTO_LINKLOCAL
ndireq.Flags = ndireq.Flags | _ND6_IFF_NO_DAD
_, _, errno = unix.Syscall(unix.SYS_IOCTL, uintptr(confd6), uintptr(_SIOCSIFINFO_IN6), uintptr(unsafe.Pointer(&ndireq)))
if errno != 0 {
tunFile.Close()
tunDestroy(assignedName)
return nil, fmt.Errorf("unable to set nd6 flags for %s: %w", assignedName, errno)
}
if name != "" {
confd, err := unix.Socket(unix.AF_INET, unix.SOCK_DGRAM, 0)
if err != nil {
tunFile.Close()
tunDestroy(assignedName)
return nil, err
}
defer unix.Close(confd)
var newnp [unix.IFNAMSIZ]byte
copy(newnp[:], name)
var ifr ifreqPtr
copy(ifr.Name[:], assignedName)
ifr.Data = uintptr(unsafe.Pointer(&newnp[0]))
_, _, errno = unix.Syscall(unix.SYS_IOCTL, uintptr(confd), uintptr(unix.SIOCSIFNAME), uintptr(unsafe.Pointer(&ifr)))
if errno != 0 {
tunFile.Close()
tunDestroy(assignedName)
return nil, fmt.Errorf("Failed to rename %s to %s: %w", assignedName, name, errno)
}
}
return CreateTUNFromFile(tunFile, mtu)
}
func CreateTUNFromFile(file *os.File, mtu int) (Device, error) {
tun := &NativeTun{
tunFile: file,
events: make(chan Event, 10),
errors: make(chan error, 1),
}
var errno syscall.Errno
tun.operateOnFd(func(fd uintptr) {
_, _, errno = unix.Syscall(unix.SYS_IOCTL, fd, _TUNSIFPID, uintptr(0))
})
if errno != 0 {
tun.tunFile.Close()
return nil, fmt.Errorf("unable to become controlling TUN process: %w", errno)
}
name, err := tun.Name()
if err != nil {
tun.tunFile.Close()
return nil, err
}
tunIfindex, err := func() (int, error) {
iface, err := net.InterfaceByName(name)
if err != nil {
return -1, err
}
return iface.Index, nil
}()
if err != nil {
tun.tunFile.Close()
return nil, err
}
tun.routeSocket, err = unix.Socket(unix.AF_ROUTE, unix.SOCK_RAW, unix.AF_UNSPEC)
if err != nil {
tun.tunFile.Close()
return nil, err
}
go tun.routineRouteListener(tunIfindex)
err = tun.setMTU(mtu)
if err != nil {
tun.Close()
return nil, err
}
return tun, nil
}
func (tun *NativeTun) Name() (string, error) {
var name string
var err error
tun.operateOnFd(func(fd uintptr) {
name, err = tunName(fd)
})
if err != nil {
return "", err
}
tun.name = name
return name, nil
}
func (tun *NativeTun) File() *os.File {
return tun.tunFile
}
func (tun *NativeTun) Events() chan Event {
return tun.events
}
func (tun *NativeTun) Read(buff []byte, offset int) (int, error) {
select {
case err := <-tun.errors:
return 0, err
default:
buff := buff[offset-4:]
n, err := tun.tunFile.Read(buff[:])
if n < 4 {
return 0, err
}
return n - 4, err
}
}
func (tun *NativeTun) Write(buf []byte, offset int) (int, error) {
if offset < 4 {
return 0, io.ErrShortBuffer
}
buf = buf[offset-4:]
if len(buf) < 5 {
return 0, io.ErrShortBuffer
}
buf[0] = 0x00
buf[1] = 0x00
buf[2] = 0x00
switch buf[4] >> 4 {
case 4:
buf[3] = unix.AF_INET
case 6:
buf[3] = unix.AF_INET6
default:
return 0, unix.EAFNOSUPPORT
}
return tun.tunFile.Write(buf)
}
func (tun *NativeTun) Flush() error {
// TODO: can flushing be implemented by buffering and using sendmmsg?
return nil
}
func (tun *NativeTun) Close() error {
var err1, err2, err3 error
tun.closeOnce.Do(func() {
err1 = tun.tunFile.Close()
err2 = tunDestroy(tun.name)
if tun.routeSocket != -1 {
unix.Shutdown(tun.routeSocket, unix.SHUT_RDWR)
err3 = unix.Close(tun.routeSocket)
tun.routeSocket = -1
} else if tun.events != nil {
close(tun.events)
}
})
if err1 != nil {
return err1
}
if err2 != nil {
return err2
}
return err3
}
func (tun *NativeTun) setMTU(n int) error {
fd, err := unix.Socket(unix.AF_INET, unix.SOCK_DGRAM, 0)
if err != nil {
return err
}
defer unix.Close(fd)
var ifr ifreqMtu
copy(ifr.Name[:], tun.name)
ifr.MTU = uint32(n)
_, _, errno := unix.Syscall(unix.SYS_IOCTL, uintptr(fd), uintptr(unix.SIOCSIFMTU), uintptr(unsafe.Pointer(&ifr)))
if errno != 0 {
return fmt.Errorf("failed to set MTU on %s: %w", tun.name, errno)
}
return nil
}
func (tun *NativeTun) MTU() (int, error) {
fd, err := unix.Socket(unix.AF_INET, unix.SOCK_DGRAM, 0)
if err != nil {
return 0, err
}
defer unix.Close(fd)
var ifr ifreqMtu
copy(ifr.Name[:], tun.name)
_, _, errno := unix.Syscall(unix.SYS_IOCTL, uintptr(fd), uintptr(unix.SIOCGIFMTU), uintptr(unsafe.Pointer(&ifr)))
if errno != 0 {
return 0, fmt.Errorf("failed to get MTU on %s: %w", tun.name, errno)
}
return int(*(*int32)(unsafe.Pointer(&ifr.MTU))), nil
}

View File

@ -1,509 +0,0 @@
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
*/
package tun
/* Implementation of the TUN device interface for linux
*/
import (
"bytes"
"errors"
"fmt"
"os"
"sync"
"syscall"
"time"
"unsafe"
"golang.org/x/net/ipv6"
"golang.org/x/sys/unix"
"github.com/KusakabeSi/EtherGuardVPN/rwcancel"
)
const (
cloneDevicePath = "/dev/net/tun"
ifReqSize = unix.IFNAMSIZ + 64
)
type NativeTun struct {
tunFile *os.File
index int32 // if index
errors chan error // async error handling
events chan Event // device related events
nopi bool // the device was passed IFF_NO_PI
netlinkSock int
netlinkCancel *rwcancel.RWCancel
hackListenerClosed sync.Mutex
statusListenersShutdown chan struct{}
closeOnce sync.Once
nameOnce sync.Once // guards calling initNameCache, which sets following fields
nameCache string // name of interface
nameErr error
}
func (tun *NativeTun) File() *os.File {
return tun.tunFile
}
func (tun *NativeTun) routineHackListener() {
defer tun.hackListenerClosed.Unlock()
/* This is needed for the detection to work across network namespaces
* If you are reading this and know a better method, please get in touch.
*/
last := 0
const (
up = 1
down = 2
)
for {
sysconn, err := tun.tunFile.SyscallConn()
if err != nil {
return
}
err2 := sysconn.Control(func(fd uintptr) {
_, err = unix.Write(int(fd), nil)
})
if err2 != nil {
return
}
switch err {
case unix.EINVAL:
if last != up {
// If the tunnel is up, it reports that write() is
// allowed but we provided invalid data.
tun.events <- EventUp
last = up
}
case unix.EIO:
if last != down {
// If the tunnel is down, it reports that no I/O
// is possible, without checking our provided data.
tun.events <- EventDown
last = down
}
default:
return
}
select {
case <-time.After(time.Second):
// nothing
case <-tun.statusListenersShutdown:
return
}
}
}
func createNetlinkSocket() (int, error) {
sock, err := unix.Socket(unix.AF_NETLINK, unix.SOCK_RAW, unix.NETLINK_ROUTE)
if err != nil {
return -1, err
}
saddr := &unix.SockaddrNetlink{
Family: unix.AF_NETLINK,
Groups: unix.RTMGRP_LINK | unix.RTMGRP_IPV4_IFADDR | unix.RTMGRP_IPV6_IFADDR,
}
err = unix.Bind(sock, saddr)
if err != nil {
return -1, err
}
return sock, nil
}
func (tun *NativeTun) routineNetlinkListener() {
defer func() {
unix.Close(tun.netlinkSock)
tun.hackListenerClosed.Lock()
close(tun.events)
tun.netlinkCancel.Close()
}()
for msg := make([]byte, 1<<16); ; {
var err error
var msgn int
for {
msgn, _, _, _, err = unix.Recvmsg(tun.netlinkSock, msg[:], nil, 0)
if err == nil || !rwcancel.RetryAfterError(err) {
break
}
if !tun.netlinkCancel.ReadyRead() {
tun.errors <- fmt.Errorf("netlink socket closed: %w", err)
return
}
}
if err != nil {
tun.errors <- fmt.Errorf("failed to receive netlink message: %w", err)
return
}
select {
case <-tun.statusListenersShutdown:
return
default:
}
wasEverUp := false
for remain := msg[:msgn]; len(remain) >= unix.SizeofNlMsghdr; {
hdr := *(*unix.NlMsghdr)(unsafe.Pointer(&remain[0]))
if int(hdr.Len) > len(remain) {
break
}
switch hdr.Type {
case unix.NLMSG_DONE:
remain = []byte{}
case unix.RTM_NEWLINK:
info := *(*unix.IfInfomsg)(unsafe.Pointer(&remain[unix.SizeofNlMsghdr]))
remain = remain[hdr.Len:]
if info.Index != tun.index {
// not our interface
continue
}
if info.Flags&unix.IFF_RUNNING != 0 {
tun.events <- EventUp
wasEverUp = true
}
if info.Flags&unix.IFF_RUNNING == 0 {
// Don't emit EventDown before we've ever emitted EventUp.
// This avoids a startup race with HackListener, which
// might detect Up before we have finished reporting Down.
if wasEverUp {
tun.events <- EventDown
}
}
tun.events <- EventMTUUpdate
default:
remain = remain[hdr.Len:]
}
}
}
}
func getIFIndex(name string) (int32, error) {
fd, err := unix.Socket(
unix.AF_INET,
unix.SOCK_DGRAM,
0,
)
if err != nil {
return 0, err
}
defer unix.Close(fd)
var ifr [ifReqSize]byte
copy(ifr[:], name)
_, _, errno := unix.Syscall(
unix.SYS_IOCTL,
uintptr(fd),
uintptr(unix.SIOCGIFINDEX),
uintptr(unsafe.Pointer(&ifr[0])),
)
if errno != 0 {
return 0, errno
}
return *(*int32)(unsafe.Pointer(&ifr[unix.IFNAMSIZ])), nil
}
func (tun *NativeTun) setMTU(n int) error {
name, err := tun.Name()
if err != nil {
return err
}
// open datagram socket
fd, err := unix.Socket(
unix.AF_INET,
unix.SOCK_DGRAM,
0,
)
if err != nil {
return err
}
defer unix.Close(fd)
// do ioctl call
var ifr [ifReqSize]byte
copy(ifr[:], name)
*(*uint32)(unsafe.Pointer(&ifr[unix.IFNAMSIZ])) = uint32(n)
_, _, errno := unix.Syscall(
unix.SYS_IOCTL,
uintptr(fd),
uintptr(unix.SIOCSIFMTU),
uintptr(unsafe.Pointer(&ifr[0])),
)
if errno != 0 {
return fmt.Errorf("failed to set MTU of TUN device: %w", errno)
}
return nil
}
func (tun *NativeTun) MTU() (int, error) {
name, err := tun.Name()
if err != nil {
return 0, err
}
// open datagram socket
fd, err := unix.Socket(
unix.AF_INET,
unix.SOCK_DGRAM,
0,
)
if err != nil {
return 0, err
}
defer unix.Close(fd)
// do ioctl call
var ifr [ifReqSize]byte
copy(ifr[:], name)
_, _, errno := unix.Syscall(
unix.SYS_IOCTL,
uintptr(fd),
uintptr(unix.SIOCGIFMTU),
uintptr(unsafe.Pointer(&ifr[0])),
)
if errno != 0 {
return 0, fmt.Errorf("failed to get MTU of TUN device: %w", errno)
}
return int(*(*int32)(unsafe.Pointer(&ifr[unix.IFNAMSIZ]))), nil
}
func (tun *NativeTun) Name() (string, error) {
tun.nameOnce.Do(tun.initNameCache)
return tun.nameCache, tun.nameErr
}
func (tun *NativeTun) initNameCache() {
tun.nameCache, tun.nameErr = tun.nameSlow()
}
func (tun *NativeTun) nameSlow() (string, error) {
sysconn, err := tun.tunFile.SyscallConn()
if err != nil {
return "", err
}
var ifr [ifReqSize]byte
var errno syscall.Errno
err = sysconn.Control(func(fd uintptr) {
_, _, errno = unix.Syscall(
unix.SYS_IOCTL,
fd,
uintptr(unix.TUNGETIFF),
uintptr(unsafe.Pointer(&ifr[0])),
)
})
if err != nil {
return "", fmt.Errorf("failed to get name of TUN device: %w", err)
}
if errno != 0 {
return "", fmt.Errorf("failed to get name of TUN device: %w", errno)
}
name := ifr[:]
if i := bytes.IndexByte(name, 0); i != -1 {
name = name[:i]
}
return string(name), nil
}
func (tun *NativeTun) Write(buf []byte, offset int) (int, error) {
if tun.nopi {
buf = buf[offset:]
} else {
// reserve space for header
buf = buf[offset-4:]
// add packet information header
buf[0] = 0x00
buf[1] = 0x00
if buf[4]>>4 == ipv6.Version {
buf[2] = 0x86
buf[3] = 0xdd
} else {
buf[2] = 0x08
buf[3] = 0x00
}
}
n, err := tun.tunFile.Write(buf)
if errors.Is(err, syscall.EBADFD) {
err = os.ErrClosed
}
return n, err
}
func (tun *NativeTun) Flush() error {
// TODO: can flushing be implemented by buffering and using sendmmsg?
return nil
}
func (tun *NativeTun) Read(buf []byte, offset int) (n int, err error) {
select {
case err = <-tun.errors:
default:
if tun.nopi {
n, err = tun.tunFile.Read(buf[offset:])
} else {
buff := buf[offset-4:]
n, err = tun.tunFile.Read(buff[:])
if errors.Is(err, syscall.EBADFD) {
err = os.ErrClosed
}
if n < 4 {
n = 0
} else {
n -= 4
}
}
}
return
}
func (tun *NativeTun) Events() chan Event {
return tun.events
}
func (tun *NativeTun) Close() error {
var err1, err2 error
tun.closeOnce.Do(func() {
if tun.statusListenersShutdown != nil {
close(tun.statusListenersShutdown)
if tun.netlinkCancel != nil {
err1 = tun.netlinkCancel.Cancel()
}
} else if tun.events != nil {
close(tun.events)
}
err2 = tun.tunFile.Close()
})
if err1 != nil {
return err1
}
return err2
}
func CreateTUN(name string, mtu int) (Device, error) {
nfd, err := unix.Open(cloneDevicePath, os.O_RDWR, 0)
if err != nil {
if os.IsNotExist(err) {
return nil, fmt.Errorf("CreateTUN(%q) failed; %s does not exist", name, cloneDevicePath)
}
return nil, err
}
var ifr [ifReqSize]byte
var flags uint16 = unix.IFF_TUN // | unix.IFF_NO_PI (disabled for TUN status hack)
nameBytes := []byte(name)
if len(nameBytes) >= unix.IFNAMSIZ {
return nil, fmt.Errorf("interface name too long: %w", unix.ENAMETOOLONG)
}
copy(ifr[:], nameBytes)
*(*uint16)(unsafe.Pointer(&ifr[unix.IFNAMSIZ])) = flags
_, _, errno := unix.Syscall(
unix.SYS_IOCTL,
uintptr(nfd),
uintptr(unix.TUNSETIFF),
uintptr(unsafe.Pointer(&ifr[0])),
)
if errno != 0 {
return nil, errno
}
err = unix.SetNonblock(nfd, true)
// Note that the above -- open,ioctl,nonblock -- must happen prior to handing it to netpoll as below this line.
fd := os.NewFile(uintptr(nfd), cloneDevicePath)
if err != nil {
return nil, err
}
return CreateTUNFromFile(fd, mtu)
}
func CreateTUNFromFile(file *os.File, mtu int) (Device, error) {
tun := &NativeTun{
tunFile: file,
events: make(chan Event, 5),
errors: make(chan error, 5),
statusListenersShutdown: make(chan struct{}),
nopi: false,
}
name, err := tun.Name()
if err != nil {
return nil, err
}
// start event listener
tun.index, err = getIFIndex(name)
if err != nil {
return nil, err
}
tun.netlinkSock, err = createNetlinkSocket()
if err != nil {
return nil, err
}
tun.netlinkCancel, err = rwcancel.NewRWCancel(tun.netlinkSock)
if err != nil {
unix.Close(tun.netlinkSock)
return nil, err
}
tun.hackListenerClosed.Lock()
go tun.routineNetlinkListener()
go tun.routineHackListener() // cross namespace
err = tun.setMTU(mtu)
if err != nil {
unix.Close(tun.netlinkSock)
return nil, err
}
return tun, nil
}
func CreateUnmonitoredTUNFromFD(fd int) (Device, string, error) {
err := unix.SetNonblock(fd, true)
if err != nil {
return nil, "", err
}
file := os.NewFile(uintptr(fd), "/dev/tun")
tun := &NativeTun{
tunFile: file,
events: make(chan Event, 5),
errors: make(chan error, 5),
nopi: true,
}
name, err := tun.Name()
if err != nil {
return nil, "", err
}
return tun, name, nil
}

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@ -1,334 +0,0 @@
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
*/
package tun
import (
"errors"
"fmt"
"net"
"os"
"sync"
"syscall"
"unsafe"
"golang.org/x/net/ipv6"
"golang.org/x/sys/unix"
)
// Structure for iface mtu get/set ioctls
type ifreq_mtu struct {
Name [unix.IFNAMSIZ]byte
MTU uint32
Pad0 [12]byte
}
const _TUNSIFMODE = 0x8004745d
type NativeTun struct {
name string
tunFile *os.File
events chan Event
errors chan error
routeSocket int
closeOnce sync.Once
}
func (tun *NativeTun) routineRouteListener(tunIfindex int) {
var (
statusUp bool
statusMTU int
)
defer close(tun.events)
check := func() bool {
iface, err := net.InterfaceByIndex(tunIfindex)
if err != nil {
tun.errors <- err
return true
}
// Up / Down event
up := (iface.Flags & net.FlagUp) != 0
if up != statusUp && up {
tun.events <- EventUp
}
if up != statusUp && !up {
tun.events <- EventDown
}
statusUp = up
// MTU changes
if iface.MTU != statusMTU {
tun.events <- EventMTUUpdate
}
statusMTU = iface.MTU
return false
}
if check() {
return
}
data := make([]byte, os.Getpagesize())
for {
n, err := unix.Read(tun.routeSocket, data)
if err != nil {
if errno, ok := err.(syscall.Errno); ok && errno == syscall.EINTR {
continue
}
tun.errors <- err
return
}
if n < 8 {
continue
}
if data[3 /* type */] != unix.RTM_IFINFO {
continue
}
ifindex := int(*(*uint16)(unsafe.Pointer(&data[6 /* ifindex */])))
if ifindex != tunIfindex {
continue
}
if check() {
return
}
}
}
func CreateTUN(name string, mtu int) (Device, error) {
ifIndex := -1
if name != "tun" {
_, err := fmt.Sscanf(name, "tun%d", &ifIndex)
if err != nil || ifIndex < 0 {
return nil, fmt.Errorf("Interface name must be tun[0-9]*")
}
}
var tunfile *os.File
var err error
if ifIndex != -1 {
tunfile, err = os.OpenFile(fmt.Sprintf("/dev/tun%d", ifIndex), unix.O_RDWR, 0)
} else {
for ifIndex = 0; ifIndex < 256; ifIndex++ {
tunfile, err = os.OpenFile(fmt.Sprintf("/dev/tun%d", ifIndex), unix.O_RDWR, 0)
if err == nil || !errors.Is(err, syscall.EBUSY) {
break
}
}
}
if err != nil {
return nil, err
}
tun, err := CreateTUNFromFile(tunfile, mtu)
if err == nil && name == "tun" {
fname := os.Getenv("WG_TUN_NAME_FILE")
if fname != "" {
os.WriteFile(fname, []byte(tun.(*NativeTun).name+"\n"), 0400)
}
}
return tun, err
}
func CreateTUNFromFile(file *os.File, mtu int) (Device, error) {
tun := &NativeTun{
tunFile: file,
events: make(chan Event, 10),
errors: make(chan error, 1),
}
name, err := tun.Name()
if err != nil {
tun.tunFile.Close()
return nil, err
}
tunIfindex, err := func() (int, error) {
iface, err := net.InterfaceByName(name)
if err != nil {
return -1, err
}
return iface.Index, nil
}()
if err != nil {
tun.tunFile.Close()
return nil, err
}
tun.routeSocket, err = unix.Socket(unix.AF_ROUTE, unix.SOCK_RAW, unix.AF_UNSPEC)
if err != nil {
tun.tunFile.Close()
return nil, err
}
go tun.routineRouteListener(tunIfindex)
currentMTU, err := tun.MTU()
if err != nil || currentMTU != mtu {
err = tun.setMTU(mtu)
if err != nil {
tun.Close()
return nil, err
}
}
return tun, nil
}
func (tun *NativeTun) Name() (string, error) {
gostat, err := tun.tunFile.Stat()
if err != nil {
tun.name = ""
return "", err
}
stat := gostat.Sys().(*syscall.Stat_t)
tun.name = fmt.Sprintf("tun%d", stat.Rdev%256)
return tun.name, nil
}
func (tun *NativeTun) File() *os.File {
return tun.tunFile
}
func (tun *NativeTun) Events() chan Event {
return tun.events
}
func (tun *NativeTun) Read(buff []byte, offset int) (int, error) {
select {
case err := <-tun.errors:
return 0, err
default:
buff := buff[offset-4:]
n, err := tun.tunFile.Read(buff[:])
if n < 4 {
return 0, err
}
return n - 4, err
}
}
func (tun *NativeTun) Write(buff []byte, offset int) (int, error) {
// reserve space for header
buff = buff[offset-4:]
// add packet information header
buff[0] = 0x00
buff[1] = 0x00
buff[2] = 0x00
if buff[4]>>4 == ipv6.Version {
buff[3] = unix.AF_INET6
} else {
buff[3] = unix.AF_INET
}
// write
return tun.tunFile.Write(buff)
}
func (tun *NativeTun) Flush() error {
// TODO: can flushing be implemented by buffering and using sendmmsg?
return nil
}
func (tun *NativeTun) Close() error {
var err1, err2 error
tun.closeOnce.Do(func() {
err1 = tun.tunFile.Close()
if tun.routeSocket != -1 {
unix.Shutdown(tun.routeSocket, unix.SHUT_RDWR)
err2 = unix.Close(tun.routeSocket)
tun.routeSocket = -1
} else if tun.events != nil {
close(tun.events)
}
})
if err1 != nil {
return err1
}
return err2
}
func (tun *NativeTun) setMTU(n int) error {
// open datagram socket
var fd int
fd, err := unix.Socket(
unix.AF_INET,
unix.SOCK_DGRAM,
0,
)
if err != nil {
return err
}
defer unix.Close(fd)
// do ioctl call
var ifr ifreq_mtu
copy(ifr.Name[:], tun.name)
ifr.MTU = uint32(n)
_, _, errno := unix.Syscall(
unix.SYS_IOCTL,
uintptr(fd),
uintptr(unix.SIOCSIFMTU),
uintptr(unsafe.Pointer(&ifr)),
)
if errno != 0 {
return fmt.Errorf("failed to set MTU on %s", tun.name)
}
return nil
}
func (tun *NativeTun) MTU() (int, error) {
// open datagram socket
fd, err := unix.Socket(
unix.AF_INET,
unix.SOCK_DGRAM,
0,
)
if err != nil {
return 0, err
}
defer unix.Close(fd)
// do ioctl call
var ifr ifreq_mtu
copy(ifr.Name[:], tun.name)
_, _, errno := unix.Syscall(
unix.SYS_IOCTL,
uintptr(fd),
uintptr(unix.SIOCGIFMTU),
uintptr(unsafe.Pointer(&ifr)),
)
if errno != 0 {
return 0, fmt.Errorf("failed to get MTU on %s", tun.name)
}
return int(*(*int32)(unsafe.Pointer(&ifr.MTU))), nil
}

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@ -1,254 +0,0 @@
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2018-2021 WireGuard LLC. All Rights Reserved.
*/
package tun
import (
"errors"
"fmt"
"log"
"os"
"sync"
"sync/atomic"
"time"
_ "unsafe"
"golang.org/x/sys/windows"
"github.com/KusakabeSi/EtherGuardVPN/tun/wintun"
)
const (
rateMeasurementGranularity = uint64((time.Second / 2) / time.Nanosecond)
spinloopRateThreshold = 800000000 / 8 // 800mbps
spinloopDuration = uint64(time.Millisecond / 80 / time.Nanosecond) // ~1gbit/s
)
type rateJuggler struct {
current uint64
nextByteCount uint64
nextStartTime int64
changing int32
}
type NativeTun struct {
wt *wintun.Adapter
handle windows.Handle
rate rateJuggler
session wintun.Session
readWait windows.Handle
events chan Event
running sync.WaitGroup
closeOnce sync.Once
close int32
forcedMTU int
}
var WintunPool, _ = wintun.MakePool("WireGuard")
var WintunStaticRequestedGUID *windows.GUID
//go:linkname procyield runtime.procyield
func procyield(cycles uint32)
//go:linkname nanotime runtime.nanotime
func nanotime() int64
//
// CreateTUN creates a Wintun interface with the given name. Should a Wintun
// interface with the same name exist, it is reused.
//
func CreateTUN(ifname string, mtu int) (Device, error) {
return CreateTUNWithRequestedGUID(ifname, WintunStaticRequestedGUID, mtu)
}
//
// CreateTUNWithRequestedGUID creates a Wintun interface with the given name and
// a requested GUID. Should a Wintun interface with the same name exist, it is reused.
//
func CreateTUNWithRequestedGUID(ifname string, requestedGUID *windows.GUID, mtu int) (Device, error) {
var err error
var wt *wintun.Adapter
// Does an interface with this name already exist?
wt, err = WintunPool.OpenAdapter(ifname)
if err == nil {
// If so, we delete it, in case it has weird residual configuration.
_, err = wt.Delete(true)
if err != nil {
return nil, fmt.Errorf("Error deleting already existing interface: %w", err)
}
}
wt, rebootRequired, err := WintunPool.CreateAdapter(ifname, requestedGUID)
if err != nil {
return nil, fmt.Errorf("Error creating interface: %w", err)
}
if rebootRequired {
log.Println("Windows indicated a reboot is required.")
}
forcedMTU := 1420
if mtu > 0 {
forcedMTU = mtu
}
tun := &NativeTun{
wt: wt,
handle: windows.InvalidHandle,
events: make(chan Event, 10),
forcedMTU: forcedMTU,
}
tun.session, err = wt.StartSession(0x800000) // Ring capacity, 8 MiB
if err != nil {
tun.wt.Delete(false)
close(tun.events)
return nil, fmt.Errorf("Error starting session: %w", err)
}
tun.readWait = tun.session.ReadWaitEvent()
return tun, nil
}
func (tun *NativeTun) Name() (string, error) {
tun.running.Add(1)
defer tun.running.Done()
if atomic.LoadInt32(&tun.close) == 1 {
return "", os.ErrClosed
}
return tun.wt.Name()
}
func (tun *NativeTun) File() *os.File {
return nil
}
func (tun *NativeTun) Events() chan Event {
return tun.events
}
func (tun *NativeTun) Close() error {
var err error
tun.closeOnce.Do(func() {
atomic.StoreInt32(&tun.close, 1)
windows.SetEvent(tun.readWait)
tun.running.Wait()
tun.session.End()
if tun.wt != nil {
_, err = tun.wt.Delete(false)
}
close(tun.events)
})
return err
}
func (tun *NativeTun) MTU() (int, error) {
return tun.forcedMTU, nil
}
// TODO: This is a temporary hack. We really need to be monitoring the interface in real time and adapting to MTU changes.
func (tun *NativeTun) ForceMTU(mtu int) {
update := tun.forcedMTU != mtu
tun.forcedMTU = mtu
if update {
tun.events <- EventMTUUpdate
}
}
// Note: Read() and Write() assume the caller comes only from a single thread; there's no locking.
func (tun *NativeTun) Read(buff []byte, offset int) (int, error) {
tun.running.Add(1)
defer tun.running.Done()
retry:
if atomic.LoadInt32(&tun.close) == 1 {
return 0, os.ErrClosed
}
start := nanotime()
shouldSpin := atomic.LoadUint64(&tun.rate.current) >= spinloopRateThreshold && uint64(start-atomic.LoadInt64(&tun.rate.nextStartTime)) <= rateMeasurementGranularity*2
for {
if atomic.LoadInt32(&tun.close) == 1 {
return 0, os.ErrClosed
}
packet, err := tun.session.ReceivePacket()
switch err {
case nil:
packetSize := len(packet)
copy(buff[offset:], packet)
tun.session.ReleaseReceivePacket(packet)
tun.rate.update(uint64(packetSize))
return packetSize, nil
case windows.ERROR_NO_MORE_ITEMS:
if !shouldSpin || uint64(nanotime()-start) >= spinloopDuration {
windows.WaitForSingleObject(tun.readWait, windows.INFINITE)
goto retry
}
procyield(1)
continue
case windows.ERROR_HANDLE_EOF:
return 0, os.ErrClosed
case windows.ERROR_INVALID_DATA:
return 0, errors.New("Send ring corrupt")
}
return 0, fmt.Errorf("Read failed: %w", err)
}
}
func (tun *NativeTun) Flush() error {
return nil
}
func (tun *NativeTun) Write(buff []byte, offset int) (int, error) {
tun.running.Add(1)
defer tun.running.Done()
if atomic.LoadInt32(&tun.close) == 1 {
return 0, os.ErrClosed
}
packetSize := len(buff) - offset
tun.rate.update(uint64(packetSize))
packet, err := tun.session.AllocateSendPacket(packetSize)
if err == nil {
copy(packet, buff[offset:])
tun.session.SendPacket(packet)
return packetSize, nil
}
switch err {
case windows.ERROR_HANDLE_EOF:
return 0, os.ErrClosed
case windows.ERROR_BUFFER_OVERFLOW:
return 0, nil // Dropping when ring is full.
}
return 0, fmt.Errorf("Write failed: %w", err)
}
// LUID returns Windows interface instance ID.
func (tun *NativeTun) LUID() uint64 {
tun.running.Add(1)
defer tun.running.Done()
if atomic.LoadInt32(&tun.close) == 1 {
return 0
}
return tun.wt.LUID()
}
// RunningVersion returns the running version of the Wintun driver.
func (tun *NativeTun) RunningVersion() (version uint32, err error) {
return wintun.RunningVersion()
}
func (rate *rateJuggler) update(packetLen uint64) {
now := nanotime()
total := atomic.AddUint64(&rate.nextByteCount, packetLen)
period := uint64(now - atomic.LoadInt64(&rate.nextStartTime))
if period >= rateMeasurementGranularity {
if !atomic.CompareAndSwapInt32(&rate.changing, 0, 1) {
return
}
atomic.StoreInt64(&rate.nextStartTime, now)
atomic.StoreUint64(&rate.current, total*uint64(time.Second/time.Nanosecond)/period)
atomic.StoreUint64(&rate.nextByteCount, 0)
atomic.StoreInt32(&rate.changing, 0)
}
}

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@ -1,148 +0,0 @@
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
*/
package tuntest
import (
"encoding/binary"
"io"
"net"
"os"
"github.com/KusakabeSi/EtherGuardVPN/tun"
)
func Ping(dst, src net.IP) []byte {
localPort := uint16(1337)
seq := uint16(0)
payload := make([]byte, 4)
binary.BigEndian.PutUint16(payload[0:], localPort)
binary.BigEndian.PutUint16(payload[2:], seq)
return genICMPv4(payload, dst, src)
}
// Checksum is the "internet checksum" from https://tools.ietf.org/html/rfc1071.
func checksum(buf []byte, initial uint16) uint16 {
v := uint32(initial)
for i := 0; i < len(buf)-1; i += 2 {
v += uint32(binary.BigEndian.Uint16(buf[i:]))
}
if len(buf)%2 == 1 {
v += uint32(buf[len(buf)-1]) << 8
}
for v > 0xffff {
v = (v >> 16) + (v & 0xffff)
}
return ^uint16(v)
}
func genICMPv4(payload []byte, dst, src net.IP) []byte {
const (
icmpv4ProtocolNumber = 1
icmpv4Echo = 8
icmpv4ChecksumOffset = 2
icmpv4Size = 8
ipv4Size = 20
ipv4TotalLenOffset = 2
ipv4ChecksumOffset = 10
ttl = 65
headerSize = ipv4Size + icmpv4Size
)
pkt := make([]byte, headerSize+len(payload))
ip := pkt[0:ipv4Size]
icmpv4 := pkt[ipv4Size : ipv4Size+icmpv4Size]
// https://tools.ietf.org/html/rfc792
icmpv4[0] = icmpv4Echo // type
icmpv4[1] = 0 // code
chksum := ^checksum(icmpv4, checksum(payload, 0))
binary.BigEndian.PutUint16(icmpv4[icmpv4ChecksumOffset:], chksum)
// https://tools.ietf.org/html/rfc760 section 3.1
length := uint16(len(pkt))
ip[0] = (4 << 4) | (ipv4Size / 4)
binary.BigEndian.PutUint16(ip[ipv4TotalLenOffset:], length)
ip[8] = ttl
ip[9] = icmpv4ProtocolNumber
copy(ip[12:], src.To4())
copy(ip[16:], dst.To4())
chksum = ^checksum(ip[:], 0)
binary.BigEndian.PutUint16(ip[ipv4ChecksumOffset:], chksum)
copy(pkt[headerSize:], payload)
return pkt
}
type ChannelTUN struct {
Inbound chan []byte // incoming packets, closed on TUN close
Outbound chan []byte // outbound packets, blocks forever on TUN close
closed chan struct{}
events chan tun.Event
tun chTun
}
func NewChannelTUN() *ChannelTUN {
c := &ChannelTUN{
Inbound: make(chan []byte),
Outbound: make(chan []byte),
closed: make(chan struct{}),
events: make(chan tun.Event, 1),
}
c.tun.c = c
c.events <- tun.EventUp
return c
}
func (c *ChannelTUN) TUN() tun.Device {
return &c.tun
}
type chTun struct {
c *ChannelTUN
}
func (t *chTun) File() *os.File { return nil }
func (t *chTun) Read(data []byte, offset int) (int, error) {
select {
case <-t.c.closed:
return 0, os.ErrClosed
case msg := <-t.c.Outbound:
return copy(data[offset:], msg), nil
}
}
// Write is called by the wireguard device to deliver a packet for routing.
func (t *chTun) Write(data []byte, offset int) (int, error) {
if offset == -1 {
close(t.c.closed)
close(t.c.events)
return 0, io.EOF
}
msg := make([]byte, len(data)-offset)
copy(msg, data[offset:])
select {
case <-t.c.closed:
return 0, os.ErrClosed
case t.c.Inbound <- msg:
return len(data) - offset, nil
}
}
const DefaultMTU = 1420
func (t *chTun) Flush() error { return nil }
func (t *chTun) MTU() (int, error) { return DefaultMTU, nil }
func (t *chTun) Name() (string, error) { return "loopbackTun1", nil }
func (t *chTun) Events() chan tun.Event { return t.c.events }
func (t *chTun) Close() error {
t.Write(nil, -1)
return nil
}

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@ -1,54 +0,0 @@
// +build !load_wintun_from_rsrc
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2019 WireGuard LLC. All Rights Reserved.
*/
package wintun
import (
"fmt"
"sync"
"sync/atomic"
"unsafe"
"golang.org/x/sys/windows"
)
type lazyDLL struct {
Name string
mu sync.Mutex
module windows.Handle
onLoad func(d *lazyDLL)
}
func (d *lazyDLL) Load() error {
if atomic.LoadPointer((*unsafe.Pointer)(unsafe.Pointer(&d.module))) != nil {
return nil
}
d.mu.Lock()
defer d.mu.Unlock()
if d.module != 0 {
return nil
}
const (
LOAD_LIBRARY_SEARCH_APPLICATION_DIR = 0x00000200
LOAD_LIBRARY_SEARCH_SYSTEM32 = 0x00000800
)
module, err := windows.LoadLibraryEx(d.Name, 0, LOAD_LIBRARY_SEARCH_APPLICATION_DIR|LOAD_LIBRARY_SEARCH_SYSTEM32)
if err != nil {
return fmt.Errorf("Unable to load library: %w", err)
}
atomic.StorePointer((*unsafe.Pointer)(unsafe.Pointer(&d.module)), unsafe.Pointer(module))
if d.onLoad != nil {
d.onLoad(d)
}
return nil
}
func (p *lazyProc) nameToAddr() (uintptr, error) {
return windows.GetProcAddress(p.dll.module, p.Name)
}

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@ -1,61 +0,0 @@
// +build load_wintun_from_rsrc
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2019 WireGuard LLC. All Rights Reserved.
*/
package wintun
import (
"fmt"
"sync"
"sync/atomic"
"unsafe"
"golang.org/x/sys/windows"
"github.com/KusakabeSi/EtherGuardVPN/tun/wintun/memmod"
)
type lazyDLL struct {
Name string
mu sync.Mutex
module *memmod.Module
onLoad func(d *lazyDLL)
}
func (d *lazyDLL) Load() error {
if atomic.LoadPointer((*unsafe.Pointer)(unsafe.Pointer(&d.module))) != nil {
return nil
}
d.mu.Lock()
defer d.mu.Unlock()
if d.module != nil {
return nil
}
const ourModule windows.Handle = 0
resInfo, err := windows.FindResource(ourModule, d.Name, windows.RT_RCDATA)
if err != nil {
return fmt.Errorf("Unable to find \"%v\" RCDATA resource: %w", d.Name, err)
}
data, err := windows.LoadResourceData(ourModule, resInfo)
if err != nil {
return fmt.Errorf("Unable to load resource: %w", err)
}
module, err := memmod.LoadLibrary(data)
if err != nil {
return fmt.Errorf("Unable to load library: %w", err)
}
atomic.StorePointer((*unsafe.Pointer)(unsafe.Pointer(&d.module)), unsafe.Pointer(module))
if d.onLoad != nil {
d.onLoad(d)
}
return nil
}
func (p *lazyProc) nameToAddr() (uintptr, error) {
return p.dll.module.ProcAddressByName(p.Name)
}

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@ -1,59 +0,0 @@
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
*/
package wintun
import (
"fmt"
"sync"
"sync/atomic"
"unsafe"
)
func newLazyDLL(name string, onLoad func(d *lazyDLL)) *lazyDLL {
return &lazyDLL{Name: name, onLoad: onLoad}
}
func (d *lazyDLL) NewProc(name string) *lazyProc {
return &lazyProc{dll: d, Name: name}
}
type lazyProc struct {
Name string
mu sync.Mutex
dll *lazyDLL
addr uintptr
}
func (p *lazyProc) Find() error {
if atomic.LoadPointer((*unsafe.Pointer)(unsafe.Pointer(&p.addr))) != nil {
return nil
}
p.mu.Lock()
defer p.mu.Unlock()
if p.addr != 0 {
return nil
}
err := p.dll.Load()
if err != nil {
return fmt.Errorf("Error loading %v DLL: %w", p.dll.Name, err)
}
addr, err := p.nameToAddr()
if err != nil {
return fmt.Errorf("Error getting %v address: %w", p.Name, err)
}
atomic.StorePointer((*unsafe.Pointer)(unsafe.Pointer(&p.addr)), unsafe.Pointer(addr))
return nil
}
func (p *lazyProc) Addr() uintptr {
err := p.Find()
if err != nil {
panic(err)
}
return p.addr
}

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@ -1,635 +0,0 @@
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
*/
package memmod
import (
"errors"
"fmt"
"syscall"
"unsafe"
"golang.org/x/sys/windows"
)
type addressList struct {
next *addressList
address uintptr
}
func (head *addressList) free() {
for node := head; node != nil; node = node.next {
windows.VirtualFree(node.address, 0, windows.MEM_RELEASE)
}
}
type Module struct {
headers *IMAGE_NT_HEADERS
codeBase uintptr
modules []windows.Handle
initialized bool
isDLL bool
isRelocated bool
nameExports map[string]uint16
entry uintptr
blockedMemory *addressList
}
func (module *Module) headerDirectory(idx int) *IMAGE_DATA_DIRECTORY {
return &module.headers.OptionalHeader.DataDirectory[idx]
}
func (module *Module) copySections(address uintptr, size uintptr, oldHeaders *IMAGE_NT_HEADERS) error {
sections := module.headers.Sections()
for i := range sections {
if sections[i].SizeOfRawData == 0 {
// Section doesn't contain data in the dll itself, but may define uninitialized data.
sectionSize := oldHeaders.OptionalHeader.SectionAlignment
if sectionSize == 0 {
continue
}
dest, err := windows.VirtualAlloc(module.codeBase+uintptr(sections[i].VirtualAddress),
uintptr(sectionSize),
windows.MEM_COMMIT,
windows.PAGE_READWRITE)
if err != nil {
return fmt.Errorf("Error allocating section: %w", err)
}
// Always use position from file to support alignments smaller than page size (allocation above will align to page size).
dest = module.codeBase + uintptr(sections[i].VirtualAddress)
// NOTE: On 64bit systems we truncate to 32bit here but expand again later when "PhysicalAddress" is used.
sections[i].SetPhysicalAddress((uint32)(dest & 0xffffffff))
var dst []byte
unsafeSlice(unsafe.Pointer(&dst), a2p(dest), int(sectionSize))
for j := range dst {
dst[j] = 0
}
continue
}
if size < uintptr(sections[i].PointerToRawData+sections[i].SizeOfRawData) {
return errors.New("Incomplete section")
}
// Commit memory block and copy data from dll.
dest, err := windows.VirtualAlloc(module.codeBase+uintptr(sections[i].VirtualAddress),
uintptr(sections[i].SizeOfRawData),
windows.MEM_COMMIT,
windows.PAGE_READWRITE)
if err != nil {
return fmt.Errorf("Error allocating memory block: %w", err)
}
// Always use position from file to support alignments smaller than page size (allocation above will align to page size).
memcpy(
module.codeBase+uintptr(sections[i].VirtualAddress),
address+uintptr(sections[i].PointerToRawData),
uintptr(sections[i].SizeOfRawData))
// NOTE: On 64bit systems we truncate to 32bit here but expand again later when "PhysicalAddress" is used.
sections[i].SetPhysicalAddress((uint32)(dest & 0xffffffff))
}
return nil
}
func (module *Module) realSectionSize(section *IMAGE_SECTION_HEADER) uintptr {
size := section.SizeOfRawData
if size != 0 {
return uintptr(size)
}
if (section.Characteristics & IMAGE_SCN_CNT_INITIALIZED_DATA) != 0 {
return uintptr(module.headers.OptionalHeader.SizeOfInitializedData)
}
if (section.Characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA) != 0 {
return uintptr(module.headers.OptionalHeader.SizeOfUninitializedData)
}
return 0
}
type sectionFinalizeData struct {
address uintptr
alignedAddress uintptr
size uintptr
characteristics uint32
last bool
}
func (module *Module) finalizeSection(sectionData *sectionFinalizeData) error {
if sectionData.size == 0 {
return nil
}
if (sectionData.characteristics & IMAGE_SCN_MEM_DISCARDABLE) != 0 {
// Section is not needed any more and can safely be freed.
if sectionData.address == sectionData.alignedAddress &&
(sectionData.last ||
(sectionData.size%uintptr(module.headers.OptionalHeader.SectionAlignment)) == 0) {
// Only allowed to decommit whole pages.
windows.VirtualFree(sectionData.address, sectionData.size, windows.MEM_DECOMMIT)
}
return nil
}
// determine protection flags based on characteristics
var ProtectionFlags = [8]uint32{
windows.PAGE_NOACCESS, // not writeable, not readable, not executable
windows.PAGE_EXECUTE, // not writeable, not readable, executable
windows.PAGE_READONLY, // not writeable, readable, not executable
windows.PAGE_EXECUTE_READ, // not writeable, readable, executable
windows.PAGE_WRITECOPY, // writeable, not readable, not executable
windows.PAGE_EXECUTE_WRITECOPY, // writeable, not readable, executable
windows.PAGE_READWRITE, // writeable, readable, not executable
windows.PAGE_EXECUTE_READWRITE, // writeable, readable, executable
}
protect := ProtectionFlags[sectionData.characteristics>>29]
if (sectionData.characteristics & IMAGE_SCN_MEM_NOT_CACHED) != 0 {
protect |= windows.PAGE_NOCACHE
}
// Change memory access flags.
var oldProtect uint32
err := windows.VirtualProtect(sectionData.address, sectionData.size, protect, &oldProtect)
if err != nil {
return fmt.Errorf("Error protecting memory page: %w", err)
}
return nil
}
var rtlAddFunctionTable = windows.NewLazySystemDLL("ntdll.dll").NewProc("RtlAddFunctionTable")
func (module *Module) registerExceptionHandlers() {
directory := module.headerDirectory(IMAGE_DIRECTORY_ENTRY_EXCEPTION)
if directory.Size == 0 || directory.VirtualAddress == 0 {
return
}
rtlAddFunctionTable.Call(module.codeBase+uintptr(directory.VirtualAddress), uintptr(directory.Size)/unsafe.Sizeof(IMAGE_RUNTIME_FUNCTION_ENTRY{}), module.codeBase)
}
func (module *Module) finalizeSections() error {
sections := module.headers.Sections()
imageOffset := module.headers.OptionalHeader.imageOffset()
sectionData := sectionFinalizeData{}
sectionData.address = uintptr(sections[0].PhysicalAddress()) | imageOffset
sectionData.alignedAddress = alignDown(sectionData.address, uintptr(module.headers.OptionalHeader.SectionAlignment))
sectionData.size = module.realSectionSize(&sections[0])
sections[0].SetVirtualSize(uint32(sectionData.size))
sectionData.characteristics = sections[0].Characteristics
// Loop through all sections and change access flags.
for i := uint16(1); i < module.headers.FileHeader.NumberOfSections; i++ {
sectionAddress := uintptr(sections[i].PhysicalAddress()) | imageOffset
alignedAddress := alignDown(sectionAddress, uintptr(module.headers.OptionalHeader.SectionAlignment))
sectionSize := module.realSectionSize(&sections[i])
sections[i].SetVirtualSize(uint32(sectionSize))
// Combine access flags of all sections that share a page.
// TODO: We currently share flags of a trailing large section with the page of a first small section. This should be optimized.
if sectionData.alignedAddress == alignedAddress || sectionData.address+sectionData.size > alignedAddress {
// Section shares page with previous.
if (sections[i].Characteristics&IMAGE_SCN_MEM_DISCARDABLE) == 0 || (sectionData.characteristics&IMAGE_SCN_MEM_DISCARDABLE) == 0 {
sectionData.characteristics = (sectionData.characteristics | sections[i].Characteristics) &^ IMAGE_SCN_MEM_DISCARDABLE
} else {
sectionData.characteristics |= sections[i].Characteristics
}
sectionData.size = sectionAddress + sectionSize - sectionData.address
continue
}
err := module.finalizeSection(&sectionData)
if err != nil {
return fmt.Errorf("Error finalizing section: %w", err)
}
sectionData.address = sectionAddress
sectionData.alignedAddress = alignedAddress
sectionData.size = sectionSize
sectionData.characteristics = sections[i].Characteristics
}
sectionData.last = true
err := module.finalizeSection(&sectionData)
if err != nil {
return fmt.Errorf("Error finalizing section: %w", err)
}
return nil
}
func (module *Module) executeTLS() {
directory := module.headerDirectory(IMAGE_DIRECTORY_ENTRY_TLS)
if directory.VirtualAddress == 0 {
return
}
tls := (*IMAGE_TLS_DIRECTORY)(a2p(module.codeBase + uintptr(directory.VirtualAddress)))
callback := tls.AddressOfCallbacks
if callback != 0 {
for {
f := *(*uintptr)(a2p(callback))
if f == 0 {
break
}
syscall.Syscall(f, 3, module.codeBase, uintptr(DLL_PROCESS_ATTACH), uintptr(0))
callback += unsafe.Sizeof(f)
}
}
}
func (module *Module) performBaseRelocation(delta uintptr) (relocated bool, err error) {
directory := module.headerDirectory(IMAGE_DIRECTORY_ENTRY_BASERELOC)
if directory.Size == 0 {
return delta == 0, nil
}
relocationHdr := (*IMAGE_BASE_RELOCATION)(a2p(module.codeBase + uintptr(directory.VirtualAddress)))
for relocationHdr.VirtualAddress > 0 {
dest := module.codeBase + uintptr(relocationHdr.VirtualAddress)
var relInfos []uint16
unsafeSlice(
unsafe.Pointer(&relInfos),
a2p(uintptr(unsafe.Pointer(relocationHdr))+unsafe.Sizeof(*relocationHdr)),
int((uintptr(relocationHdr.SizeOfBlock)-unsafe.Sizeof(*relocationHdr))/unsafe.Sizeof(relInfos[0])))
for _, relInfo := range relInfos {
// The upper 4 bits define the type of relocation.
relType := relInfo >> 12
// The lower 12 bits define the offset.
relOffset := uintptr(relInfo & 0xfff)
switch relType {
case IMAGE_REL_BASED_ABSOLUTE:
// Skip relocation.
case IMAGE_REL_BASED_LOW:
*(*uint16)(a2p(dest + relOffset)) += uint16(delta & 0xffff)
break
case IMAGE_REL_BASED_HIGH:
*(*uint16)(a2p(dest + relOffset)) += uint16(uint32(delta) >> 16)
break
case IMAGE_REL_BASED_HIGHLOW:
*(*uint32)(a2p(dest + relOffset)) += uint32(delta)
case IMAGE_REL_BASED_DIR64:
*(*uint64)(a2p(dest + relOffset)) += uint64(delta)
case IMAGE_REL_BASED_THUMB_MOV32:
inst := *(*uint32)(a2p(dest + relOffset))
imm16 := ((inst << 1) & 0x0800) + ((inst << 12) & 0xf000) +
((inst >> 20) & 0x0700) + ((inst >> 16) & 0x00ff)
if (inst & 0x8000fbf0) != 0x0000f240 {
return false, fmt.Errorf("Wrong Thumb2 instruction %08x, expected MOVW", inst)
}
imm16 += uint32(delta) & 0xffff
hiDelta := (uint32(delta&0xffff0000) >> 16) + ((imm16 & 0xffff0000) >> 16)
*(*uint32)(a2p(dest + relOffset)) = (inst & 0x8f00fbf0) + ((imm16 >> 1) & 0x0400) +
((imm16 >> 12) & 0x000f) +
((imm16 << 20) & 0x70000000) +
((imm16 << 16) & 0xff0000)
if hiDelta != 0 {
inst = *(*uint32)(a2p(dest + relOffset + 4))
imm16 = ((inst << 1) & 0x0800) + ((inst << 12) & 0xf000) +
((inst >> 20) & 0x0700) + ((inst >> 16) & 0x00ff)
if (inst & 0x8000fbf0) != 0x0000f2c0 {
return false, fmt.Errorf("Wrong Thumb2 instruction %08x, expected MOVT", inst)
}
imm16 += hiDelta
if imm16 > 0xffff {
return false, fmt.Errorf("Resulting immediate value won't fit: %08x", imm16)
}
*(*uint32)(a2p(dest + relOffset + 4)) = (inst & 0x8f00fbf0) +
((imm16 >> 1) & 0x0400) +
((imm16 >> 12) & 0x000f) +
((imm16 << 20) & 0x70000000) +
((imm16 << 16) & 0xff0000)
}
default:
return false, fmt.Errorf("Unsupported relocation: %v", relType)
}
}
// Advance to next relocation block.
relocationHdr = (*IMAGE_BASE_RELOCATION)(a2p(uintptr(unsafe.Pointer(relocationHdr)) + uintptr(relocationHdr.SizeOfBlock)))
}
return true, nil
}
func (module *Module) buildImportTable() error {
directory := module.headerDirectory(IMAGE_DIRECTORY_ENTRY_IMPORT)
if directory.Size == 0 {
return nil
}
module.modules = make([]windows.Handle, 0, 16)
importDesc := (*IMAGE_IMPORT_DESCRIPTOR)(a2p(module.codeBase + uintptr(directory.VirtualAddress)))
for importDesc.Name != 0 {
handle, err := windows.LoadLibraryEx(windows.BytePtrToString((*byte)(a2p(module.codeBase+uintptr(importDesc.Name)))), 0, windows.LOAD_LIBRARY_SEARCH_SYSTEM32)
if err != nil {
return fmt.Errorf("Error loading module: %w", err)
}
var thunkRef, funcRef *uintptr
if importDesc.OriginalFirstThunk() != 0 {
thunkRef = (*uintptr)(a2p(module.codeBase + uintptr(importDesc.OriginalFirstThunk())))
funcRef = (*uintptr)(a2p(module.codeBase + uintptr(importDesc.FirstThunk)))
} else {
// No hint table.
thunkRef = (*uintptr)(a2p(module.codeBase + uintptr(importDesc.FirstThunk)))
funcRef = (*uintptr)(a2p(module.codeBase + uintptr(importDesc.FirstThunk)))
}
for *thunkRef != 0 {
if IMAGE_SNAP_BY_ORDINAL(*thunkRef) {
*funcRef, err = windows.GetProcAddressByOrdinal(handle, IMAGE_ORDINAL(*thunkRef))
} else {
thunkData := (*IMAGE_IMPORT_BY_NAME)(a2p(module.codeBase + *thunkRef))
*funcRef, err = windows.GetProcAddress(handle, windows.BytePtrToString(&thunkData.Name[0]))
}
if err != nil {
windows.FreeLibrary(handle)
return fmt.Errorf("Error getting function address: %w", err)
}
thunkRef = (*uintptr)(a2p(uintptr(unsafe.Pointer(thunkRef)) + unsafe.Sizeof(*thunkRef)))
funcRef = (*uintptr)(a2p(uintptr(unsafe.Pointer(funcRef)) + unsafe.Sizeof(*funcRef)))
}
module.modules = append(module.modules, handle)
importDesc = (*IMAGE_IMPORT_DESCRIPTOR)(a2p(uintptr(unsafe.Pointer(importDesc)) + unsafe.Sizeof(*importDesc)))
}
return nil
}
func (module *Module) buildNameExports() error {
directory := module.headerDirectory(IMAGE_DIRECTORY_ENTRY_EXPORT)
if directory.Size == 0 {
return errors.New("No export table found")
}
exports := (*IMAGE_EXPORT_DIRECTORY)(a2p(module.codeBase + uintptr(directory.VirtualAddress)))
if exports.NumberOfNames == 0 || exports.NumberOfFunctions == 0 {
return errors.New("No functions exported")
}
if exports.NumberOfNames == 0 {
return errors.New("No functions exported by name")
}
var nameRefs []uint32
unsafeSlice(unsafe.Pointer(&nameRefs), a2p(module.codeBase+uintptr(exports.AddressOfNames)), int(exports.NumberOfNames))
var ordinals []uint16
unsafeSlice(unsafe.Pointer(&ordinals), a2p(module.codeBase+uintptr(exports.AddressOfNameOrdinals)), int(exports.NumberOfNames))
module.nameExports = make(map[string]uint16)
for i := range nameRefs {
nameArray := windows.BytePtrToString((*byte)(a2p(module.codeBase + uintptr(nameRefs[i]))))
module.nameExports[nameArray] = ordinals[i]
}
return nil
}
// LoadLibrary loads module image to memory.
func LoadLibrary(data []byte) (module *Module, err error) {
addr := uintptr(unsafe.Pointer(&data[0]))
size := uintptr(len(data))
if size < unsafe.Sizeof(IMAGE_DOS_HEADER{}) {
return nil, errors.New("Incomplete IMAGE_DOS_HEADER")
}
dosHeader := (*IMAGE_DOS_HEADER)(a2p(addr))
if dosHeader.E_magic != IMAGE_DOS_SIGNATURE {
return nil, fmt.Errorf("Not an MS-DOS binary (provided: %x, expected: %x)", dosHeader.E_magic, IMAGE_DOS_SIGNATURE)
}
if (size < uintptr(dosHeader.E_lfanew)+unsafe.Sizeof(IMAGE_NT_HEADERS{})) {
return nil, errors.New("Incomplete IMAGE_NT_HEADERS")
}
oldHeader := (*IMAGE_NT_HEADERS)(a2p(addr + uintptr(dosHeader.E_lfanew)))
if oldHeader.Signature != IMAGE_NT_SIGNATURE {
return nil, fmt.Errorf("Not an NT binary (provided: %x, expected: %x)", oldHeader.Signature, IMAGE_NT_SIGNATURE)
}
if oldHeader.FileHeader.Machine != imageFileProcess {
return nil, fmt.Errorf("Foreign platform (provided: %x, expected: %x)", oldHeader.FileHeader.Machine, imageFileProcess)
}
if (oldHeader.OptionalHeader.SectionAlignment & 1) != 0 {
return nil, errors.New("Unaligned section")
}
lastSectionEnd := uintptr(0)
sections := oldHeader.Sections()
optionalSectionSize := oldHeader.OptionalHeader.SectionAlignment
for i := range sections {
var endOfSection uintptr
if sections[i].SizeOfRawData == 0 {
// Section without data in the DLL
endOfSection = uintptr(sections[i].VirtualAddress) + uintptr(optionalSectionSize)
} else {
endOfSection = uintptr(sections[i].VirtualAddress) + uintptr(sections[i].SizeOfRawData)
}
if endOfSection > lastSectionEnd {
lastSectionEnd = endOfSection
}
}
alignedImageSize := alignUp(uintptr(oldHeader.OptionalHeader.SizeOfImage), uintptr(oldHeader.OptionalHeader.SectionAlignment))
if alignedImageSize != alignUp(lastSectionEnd, uintptr(oldHeader.OptionalHeader.SectionAlignment)) {
return nil, errors.New("Section is not page-aligned")
}
module = &Module{isDLL: (oldHeader.FileHeader.Characteristics & IMAGE_FILE_DLL) != 0}
defer func() {
if err != nil {
module.Free()
module = nil
}
}()
// Reserve memory for image of library.
// TODO: Is it correct to commit the complete memory region at once? Calling DllEntry raises an exception if we don't.
module.codeBase, err = windows.VirtualAlloc(oldHeader.OptionalHeader.ImageBase,
alignedImageSize,
windows.MEM_RESERVE|windows.MEM_COMMIT,
windows.PAGE_READWRITE)
if err != nil {
// Try to allocate memory at arbitrary position.
module.codeBase, err = windows.VirtualAlloc(0,
alignedImageSize,
windows.MEM_RESERVE|windows.MEM_COMMIT,
windows.PAGE_READWRITE)
if err != nil {
err = fmt.Errorf("Error allocating code: %w", err)
return
}
}
err = module.check4GBBoundaries(alignedImageSize)
if err != nil {
err = fmt.Errorf("Error reallocating code: %w", err)
return
}
if size < uintptr(oldHeader.OptionalHeader.SizeOfHeaders) {
err = errors.New("Incomplete headers")
return
}
// Commit memory for headers.
headers, err := windows.VirtualAlloc(module.codeBase,
uintptr(oldHeader.OptionalHeader.SizeOfHeaders),
windows.MEM_COMMIT,
windows.PAGE_READWRITE)
if err != nil {
err = fmt.Errorf("Error allocating headers: %w", err)
return
}
// Copy PE header to code.
memcpy(headers, addr, uintptr(oldHeader.OptionalHeader.SizeOfHeaders))
module.headers = (*IMAGE_NT_HEADERS)(a2p(headers + uintptr(dosHeader.E_lfanew)))
// Update position.
module.headers.OptionalHeader.ImageBase = module.codeBase
// Copy sections from DLL file block to new memory location.
err = module.copySections(addr, size, oldHeader)
if err != nil {
err = fmt.Errorf("Error copying sections: %w", err)
return
}
// Adjust base address of imported data.
locationDelta := module.headers.OptionalHeader.ImageBase - oldHeader.OptionalHeader.ImageBase
if locationDelta != 0 {
module.isRelocated, err = module.performBaseRelocation(locationDelta)
if err != nil {
err = fmt.Errorf("Error relocating module: %w", err)
return
}
} else {
module.isRelocated = true
}
// Load required dlls and adjust function table of imports.
err = module.buildImportTable()
if err != nil {
err = fmt.Errorf("Error building import table: %w", err)
return
}
// Mark memory pages depending on section headers and release sections that are marked as "discardable".
err = module.finalizeSections()
if err != nil {
err = fmt.Errorf("Error finalizing sections: %w", err)
return
}
// Register exception tables, if they exist.
module.registerExceptionHandlers()
// TLS callbacks are executed BEFORE the main loading.
module.executeTLS()
// Get entry point of loaded module.
if module.headers.OptionalHeader.AddressOfEntryPoint != 0 {
module.entry = module.codeBase + uintptr(module.headers.OptionalHeader.AddressOfEntryPoint)
if module.isDLL {
// Notify library about attaching to process.
r0, _, _ := syscall.Syscall(module.entry, 3, module.codeBase, uintptr(DLL_PROCESS_ATTACH), 0)
successful := r0 != 0
if !successful {
err = windows.ERROR_DLL_INIT_FAILED
return
}
module.initialized = true
}
}
module.buildNameExports()
return
}
// Free releases module resources and unloads it.
func (module *Module) Free() {
if module.initialized {
// Notify library about detaching from process.
syscall.Syscall(module.entry, 3, module.codeBase, uintptr(DLL_PROCESS_DETACH), 0)
module.initialized = false
}
if module.modules != nil {
// Free previously opened libraries.
for _, handle := range module.modules {
windows.FreeLibrary(handle)
}
module.modules = nil
}
if module.codeBase != 0 {
windows.VirtualFree(module.codeBase, 0, windows.MEM_RELEASE)
module.codeBase = 0
}
if module.blockedMemory != nil {
module.blockedMemory.free()
module.blockedMemory = nil
}
}
// ProcAddressByName returns function address by exported name.
func (module *Module) ProcAddressByName(name string) (uintptr, error) {
directory := module.headerDirectory(IMAGE_DIRECTORY_ENTRY_EXPORT)
if directory.Size == 0 {
return 0, errors.New("No export table found")
}
exports := (*IMAGE_EXPORT_DIRECTORY)(a2p(module.codeBase + uintptr(directory.VirtualAddress)))
if module.nameExports == nil {
return 0, errors.New("No functions exported by name")
}
if idx, ok := module.nameExports[name]; ok {
if uint32(idx) > exports.NumberOfFunctions {
return 0, errors.New("Ordinal number too high")
}
// AddressOfFunctions contains the RVAs to the "real" functions.
return module.codeBase + uintptr(*(*uint32)(a2p(module.codeBase + uintptr(exports.AddressOfFunctions) + uintptr(idx)*4))), nil
}
return 0, errors.New("Function not found by name")
}
// ProcAddressByOrdinal returns function address by exported ordinal.
func (module *Module) ProcAddressByOrdinal(ordinal uint16) (uintptr, error) {
directory := module.headerDirectory(IMAGE_DIRECTORY_ENTRY_EXPORT)
if directory.Size == 0 {
return 0, errors.New("No export table found")
}
exports := (*IMAGE_EXPORT_DIRECTORY)(a2p(module.codeBase + uintptr(directory.VirtualAddress)))
if uint32(ordinal) < exports.Base {
return 0, errors.New("Ordinal number too low")
}
idx := ordinal - uint16(exports.Base)
if uint32(idx) > exports.NumberOfFunctions {
return 0, errors.New("Ordinal number too high")
}
// AddressOfFunctions contains the RVAs to the "real" functions.
return module.codeBase + uintptr(*(*uint32)(a2p(module.codeBase + uintptr(exports.AddressOfFunctions) + uintptr(idx)*4))), nil
}
func alignDown(value, alignment uintptr) uintptr {
return value & ^(alignment - 1)
}
func alignUp(value, alignment uintptr) uintptr {
return (value + alignment - 1) & ^(alignment - 1)
}
func a2p(addr uintptr) unsafe.Pointer {
return unsafe.Pointer(addr)
}
func memcpy(dst, src, size uintptr) {
var d, s []byte
unsafeSlice(unsafe.Pointer(&d), a2p(dst), int(size))
unsafeSlice(unsafe.Pointer(&s), a2p(src), int(size))
copy(d, s)
}
// 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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@ -1,16 +0,0 @@
// +build windows,386 windows,arm
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
*/
package memmod
func (opthdr *IMAGE_OPTIONAL_HEADER) imageOffset() uintptr {
return 0
}
func (module *Module) check4GBBoundaries(alignedImageSize uintptr) (err error) {
return
}

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@ -1,8 +0,0 @@
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
*/
package memmod
const imageFileProcess = IMAGE_FILE_MACHINE_I386

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@ -1,36 +0,0 @@
// +build windows,amd64 windows,arm64
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
*/
package memmod
import (
"fmt"
"golang.org/x/sys/windows"
)
func (opthdr *IMAGE_OPTIONAL_HEADER) imageOffset() uintptr {
return uintptr(opthdr.ImageBase & 0xffffffff00000000)
}
func (module *Module) check4GBBoundaries(alignedImageSize uintptr) (err error) {
for (module.codeBase >> 32) < ((module.codeBase + alignedImageSize) >> 32) {
node := &addressList{
next: module.blockedMemory,
address: module.codeBase,
}
module.blockedMemory = node
module.codeBase, err = windows.VirtualAlloc(0,
alignedImageSize,
windows.MEM_RESERVE|windows.MEM_COMMIT,
windows.PAGE_READWRITE)
if err != nil {
return fmt.Errorf("Error allocating memory block: %w", err)
}
}
return
}

View File

@ -1,8 +0,0 @@
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
*/
package memmod
const imageFileProcess = IMAGE_FILE_MACHINE_AMD64

View File

@ -1,8 +0,0 @@
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
*/
package memmod
const imageFileProcess = IMAGE_FILE_MACHINE_ARMNT

View File

@ -1,8 +0,0 @@
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
*/
package memmod
const imageFileProcess = IMAGE_FILE_MACHINE_ARM64

View File

@ -1,398 +0,0 @@
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
*/
package memmod
import "unsafe"
const (
IMAGE_DOS_SIGNATURE = 0x5A4D // MZ
IMAGE_OS2_SIGNATURE = 0x454E // NE
IMAGE_OS2_SIGNATURE_LE = 0x454C // LE
IMAGE_VXD_SIGNATURE = 0x454C // LE
IMAGE_NT_SIGNATURE = 0x00004550 // PE00
)
// DOS .EXE header
type IMAGE_DOS_HEADER struct {
E_magic uint16 // Magic number
E_cblp uint16 // Bytes on last page of file
E_cp uint16 // Pages in file
E_crlc uint16 // Relocations
E_cparhdr uint16 // Size of header in paragraphs
E_minalloc uint16 // Minimum extra paragraphs needed
E_maxalloc uint16 // Maximum extra paragraphs needed
E_ss uint16 // Initial (relative) SS value
E_sp uint16 // Initial SP value
E_csum uint16 // Checksum
E_ip uint16 // Initial IP value
E_cs uint16 // Initial (relative) CS value
E_lfarlc uint16 // File address of relocation table
E_ovno uint16 // Overlay number
E_res [4]uint16 // Reserved words
E_oemid uint16 // OEM identifier (for e_oeminfo)
E_oeminfo uint16 // OEM information; e_oemid specific
E_res2 [10]uint16 // Reserved words
E_lfanew int32 // File address of new exe header
}
// File header format
type IMAGE_FILE_HEADER struct {
Machine uint16
NumberOfSections uint16
TimeDateStamp uint32
PointerToSymbolTable uint32
NumberOfSymbols uint32
SizeOfOptionalHeader uint16
Characteristics uint16
}
const (
IMAGE_SIZEOF_FILE_HEADER = 20
IMAGE_FILE_RELOCS_STRIPPED = 0x0001 // Relocation info stripped from file.
IMAGE_FILE_EXECUTABLE_IMAGE = 0x0002 // File is executable (i.e. no unresolved external references).
IMAGE_FILE_LINE_NUMS_STRIPPED = 0x0004 // Line nunbers stripped from file.
IMAGE_FILE_LOCAL_SYMS_STRIPPED = 0x0008 // Local symbols stripped from file.
IMAGE_FILE_AGGRESIVE_WS_TRIM = 0x0010 // Aggressively trim working set
IMAGE_FILE_LARGE_ADDRESS_AWARE = 0x0020 // App can handle >2gb addresses
IMAGE_FILE_BYTES_REVERSED_LO = 0x0080 // Bytes of machine word are reversed.
IMAGE_FILE_32BIT_MACHINE = 0x0100 // 32 bit word machine.
IMAGE_FILE_DEBUG_STRIPPED = 0x0200 // Debugging info stripped from file in .DBG file
IMAGE_FILE_REMOVABLE_RUN_FROM_SWAP = 0x0400 // If Image is on removable media, copy and run from the swap file.
IMAGE_FILE_NET_RUN_FROM_SWAP = 0x0800 // If Image is on Net, copy and run from the swap file.
IMAGE_FILE_SYSTEM = 0x1000 // System File.
IMAGE_FILE_DLL = 0x2000 // File is a DLL.
IMAGE_FILE_UP_SYSTEM_ONLY = 0x4000 // File should only be run on a UP machine
IMAGE_FILE_BYTES_REVERSED_HI = 0x8000 // Bytes of machine word are reversed.
IMAGE_FILE_MACHINE_UNKNOWN = 0
IMAGE_FILE_MACHINE_TARGET_HOST = 0x0001 // Useful for indicating we want to interact with the host and not a WoW guest.
IMAGE_FILE_MACHINE_I386 = 0x014c // Intel 386.
IMAGE_FILE_MACHINE_R3000 = 0x0162 // MIPS little-endian, 0x160 big-endian
IMAGE_FILE_MACHINE_R4000 = 0x0166 // MIPS little-endian
IMAGE_FILE_MACHINE_R10000 = 0x0168 // MIPS little-endian
IMAGE_FILE_MACHINE_WCEMIPSV2 = 0x0169 // MIPS little-endian WCE v2
IMAGE_FILE_MACHINE_ALPHA = 0x0184 // Alpha_AXP
IMAGE_FILE_MACHINE_SH3 = 0x01a2 // SH3 little-endian
IMAGE_FILE_MACHINE_SH3DSP = 0x01a3
IMAGE_FILE_MACHINE_SH3E = 0x01a4 // SH3E little-endian
IMAGE_FILE_MACHINE_SH4 = 0x01a6 // SH4 little-endian
IMAGE_FILE_MACHINE_SH5 = 0x01a8 // SH5
IMAGE_FILE_MACHINE_ARM = 0x01c0 // ARM Little-Endian
IMAGE_FILE_MACHINE_THUMB = 0x01c2 // ARM Thumb/Thumb-2 Little-Endian
IMAGE_FILE_MACHINE_ARMNT = 0x01c4 // ARM Thumb-2 Little-Endian
IMAGE_FILE_MACHINE_AM33 = 0x01d3
IMAGE_FILE_MACHINE_POWERPC = 0x01F0 // IBM PowerPC Little-Endian
IMAGE_FILE_MACHINE_POWERPCFP = 0x01f1
IMAGE_FILE_MACHINE_IA64 = 0x0200 // Intel 64
IMAGE_FILE_MACHINE_MIPS16 = 0x0266 // MIPS
IMAGE_FILE_MACHINE_ALPHA64 = 0x0284 // ALPHA64
IMAGE_FILE_MACHINE_MIPSFPU = 0x0366 // MIPS
IMAGE_FILE_MACHINE_MIPSFPU16 = 0x0466 // MIPS
IMAGE_FILE_MACHINE_AXP64 = IMAGE_FILE_MACHINE_ALPHA64
IMAGE_FILE_MACHINE_TRICORE = 0x0520 // Infineon
IMAGE_FILE_MACHINE_CEF = 0x0CEF
IMAGE_FILE_MACHINE_EBC = 0x0EBC // EFI Byte Code
IMAGE_FILE_MACHINE_AMD64 = 0x8664 // AMD64 (K8)
IMAGE_FILE_MACHINE_M32R = 0x9041 // M32R little-endian
IMAGE_FILE_MACHINE_ARM64 = 0xAA64 // ARM64 Little-Endian
IMAGE_FILE_MACHINE_CEE = 0xC0EE
)
// Directory format
type IMAGE_DATA_DIRECTORY struct {
VirtualAddress uint32
Size uint32
}
const IMAGE_NUMBEROF_DIRECTORY_ENTRIES = 16
type IMAGE_NT_HEADERS struct {
Signature uint32
FileHeader IMAGE_FILE_HEADER
OptionalHeader IMAGE_OPTIONAL_HEADER
}
func (ntheader *IMAGE_NT_HEADERS) Sections() []IMAGE_SECTION_HEADER {
return (*[0xffff]IMAGE_SECTION_HEADER)(unsafe.Pointer(
(uintptr)(unsafe.Pointer(ntheader)) +
unsafe.Offsetof(ntheader.OptionalHeader) +
uintptr(ntheader.FileHeader.SizeOfOptionalHeader)))[:ntheader.FileHeader.NumberOfSections]
}
const (
IMAGE_DIRECTORY_ENTRY_EXPORT = 0 // Export Directory
IMAGE_DIRECTORY_ENTRY_IMPORT = 1 // Import Directory
IMAGE_DIRECTORY_ENTRY_RESOURCE = 2 // Resource Directory
IMAGE_DIRECTORY_ENTRY_EXCEPTION = 3 // Exception Directory
IMAGE_DIRECTORY_ENTRY_SECURITY = 4 // Security Directory
IMAGE_DIRECTORY_ENTRY_BASERELOC = 5 // Base Relocation Table
IMAGE_DIRECTORY_ENTRY_DEBUG = 6 // Debug Directory
IMAGE_DIRECTORY_ENTRY_COPYRIGHT = 7 // (X86 usage)
IMAGE_DIRECTORY_ENTRY_ARCHITECTURE = 7 // Architecture Specific Data
IMAGE_DIRECTORY_ENTRY_GLOBALPTR = 8 // RVA of GP
IMAGE_DIRECTORY_ENTRY_TLS = 9 // TLS Directory
IMAGE_DIRECTORY_ENTRY_LOAD_CONFIG = 10 // Load Configuration Directory
IMAGE_DIRECTORY_ENTRY_BOUND_IMPORT = 11 // Bound Import Directory in headers
IMAGE_DIRECTORY_ENTRY_IAT = 12 // Import Address Table
IMAGE_DIRECTORY_ENTRY_DELAY_IMPORT = 13 // Delay Load Import Descriptors
IMAGE_DIRECTORY_ENTRY_COM_DESCRIPTOR = 14 // COM Runtime descriptor
)
const IMAGE_SIZEOF_SHORT_NAME = 8
// Section header format
type IMAGE_SECTION_HEADER struct {
Name [IMAGE_SIZEOF_SHORT_NAME]byte
physicalAddressOrVirtualSize uint32
VirtualAddress uint32
SizeOfRawData uint32
PointerToRawData uint32
PointerToRelocations uint32
PointerToLinenumbers uint32
NumberOfRelocations uint16
NumberOfLinenumbers uint16
Characteristics uint32
}
func (ishdr *IMAGE_SECTION_HEADER) PhysicalAddress() uint32 {
return ishdr.physicalAddressOrVirtualSize
}
func (ishdr *IMAGE_SECTION_HEADER) SetPhysicalAddress(addr uint32) {
ishdr.physicalAddressOrVirtualSize = addr
}
func (ishdr *IMAGE_SECTION_HEADER) VirtualSize() uint32 {
return ishdr.physicalAddressOrVirtualSize
}
func (ishdr *IMAGE_SECTION_HEADER) SetVirtualSize(addr uint32) {
ishdr.physicalAddressOrVirtualSize = addr
}
const (
// Dll characteristics.
IMAGE_DLL_CHARACTERISTICS_HIGH_ENTROPY_VA = 0x0020
IMAGE_DLL_CHARACTERISTICS_DYNAMIC_BASE = 0x0040
IMAGE_DLL_CHARACTERISTICS_FORCE_INTEGRITY = 0x0080
IMAGE_DLL_CHARACTERISTICS_NX_COMPAT = 0x0100
IMAGE_DLL_CHARACTERISTICS_NO_ISOLATION = 0x0200
IMAGE_DLL_CHARACTERISTICS_NO_SEH = 0x0400
IMAGE_DLL_CHARACTERISTICS_NO_BIND = 0x0800
IMAGE_DLL_CHARACTERISTICS_APPCONTAINER = 0x1000
IMAGE_DLL_CHARACTERISTICS_WDM_DRIVER = 0x2000
IMAGE_DLL_CHARACTERISTICS_GUARD_CF = 0x4000
IMAGE_DLL_CHARACTERISTICS_TERMINAL_SERVER_AWARE = 0x8000
)
const (
// Section characteristics.
IMAGE_SCN_TYPE_REG = 0x00000000 // Reserved.
IMAGE_SCN_TYPE_DSECT = 0x00000001 // Reserved.
IMAGE_SCN_TYPE_NOLOAD = 0x00000002 // Reserved.
IMAGE_SCN_TYPE_GROUP = 0x00000004 // Reserved.
IMAGE_SCN_TYPE_NO_PAD = 0x00000008 // Reserved.
IMAGE_SCN_TYPE_COPY = 0x00000010 // Reserved.
IMAGE_SCN_CNT_CODE = 0x00000020 // Section contains code.
IMAGE_SCN_CNT_INITIALIZED_DATA = 0x00000040 // Section contains initialized data.
IMAGE_SCN_CNT_UNINITIALIZED_DATA = 0x00000080 // Section contains uninitialized data.
IMAGE_SCN_LNK_OTHER = 0x00000100 // Reserved.
IMAGE_SCN_LNK_INFO = 0x00000200 // Section contains comments or some other type of information.
IMAGE_SCN_TYPE_OVER = 0x00000400 // Reserved.
IMAGE_SCN_LNK_REMOVE = 0x00000800 // Section contents will not become part of image.
IMAGE_SCN_LNK_COMDAT = 0x00001000 // Section contents comdat.
IMAGE_SCN_MEM_PROTECTED = 0x00004000 // Obsolete.
IMAGE_SCN_NO_DEFER_SPEC_EXC = 0x00004000 // Reset speculative exceptions handling bits in the TLB entries for this section.
IMAGE_SCN_GPREL = 0x00008000 // Section content can be accessed relative to GP
IMAGE_SCN_MEM_FARDATA = 0x00008000
IMAGE_SCN_MEM_SYSHEAP = 0x00010000 // Obsolete.
IMAGE_SCN_MEM_PURGEABLE = 0x00020000
IMAGE_SCN_MEM_16BIT = 0x00020000
IMAGE_SCN_MEM_LOCKED = 0x00040000
IMAGE_SCN_MEM_PRELOAD = 0x00080000
IMAGE_SCN_ALIGN_1BYTES = 0x00100000 //
IMAGE_SCN_ALIGN_2BYTES = 0x00200000 //
IMAGE_SCN_ALIGN_4BYTES = 0x00300000 //
IMAGE_SCN_ALIGN_8BYTES = 0x00400000 //
IMAGE_SCN_ALIGN_16BYTES = 0x00500000 // Default alignment if no others are specified.
IMAGE_SCN_ALIGN_32BYTES = 0x00600000 //
IMAGE_SCN_ALIGN_64BYTES = 0x00700000 //
IMAGE_SCN_ALIGN_128BYTES = 0x00800000 //
IMAGE_SCN_ALIGN_256BYTES = 0x00900000 //
IMAGE_SCN_ALIGN_512BYTES = 0x00A00000 //
IMAGE_SCN_ALIGN_1024BYTES = 0x00B00000 //
IMAGE_SCN_ALIGN_2048BYTES = 0x00C00000 //
IMAGE_SCN_ALIGN_4096BYTES = 0x00D00000 //
IMAGE_SCN_ALIGN_8192BYTES = 0x00E00000 //
IMAGE_SCN_ALIGN_MASK = 0x00F00000
IMAGE_SCN_LNK_NRELOC_OVFL = 0x01000000 // Section contains extended relocations.
IMAGE_SCN_MEM_DISCARDABLE = 0x02000000 // Section can be discarded.
IMAGE_SCN_MEM_NOT_CACHED = 0x04000000 // Section is not cachable.
IMAGE_SCN_MEM_NOT_PAGED = 0x08000000 // Section is not pageable.
IMAGE_SCN_MEM_SHARED = 0x10000000 // Section is shareable.
IMAGE_SCN_MEM_EXECUTE = 0x20000000 // Section is executable.
IMAGE_SCN_MEM_READ = 0x40000000 // Section is readable.
IMAGE_SCN_MEM_WRITE = 0x80000000 // Section is writeable.
// TLS Characteristic Flags
IMAGE_SCN_SCALE_INDEX = 0x00000001 // Tls index is scaled.
)
// Based relocation format
type IMAGE_BASE_RELOCATION struct {
VirtualAddress uint32
SizeOfBlock uint32
}
const (
IMAGE_REL_BASED_ABSOLUTE = 0
IMAGE_REL_BASED_HIGH = 1
IMAGE_REL_BASED_LOW = 2
IMAGE_REL_BASED_HIGHLOW = 3
IMAGE_REL_BASED_HIGHADJ = 4
IMAGE_REL_BASED_MACHINE_SPECIFIC_5 = 5
IMAGE_REL_BASED_RESERVED = 6
IMAGE_REL_BASED_MACHINE_SPECIFIC_7 = 7
IMAGE_REL_BASED_MACHINE_SPECIFIC_8 = 8
IMAGE_REL_BASED_MACHINE_SPECIFIC_9 = 9
IMAGE_REL_BASED_DIR64 = 10
IMAGE_REL_BASED_IA64_IMM64 = 9
IMAGE_REL_BASED_MIPS_JMPADDR = 5
IMAGE_REL_BASED_MIPS_JMPADDR16 = 9
IMAGE_REL_BASED_ARM_MOV32 = 5
IMAGE_REL_BASED_THUMB_MOV32 = 7
)
// Export Format
type IMAGE_EXPORT_DIRECTORY struct {
Characteristics uint32
TimeDateStamp uint32
MajorVersion uint16
MinorVersion uint16
Name uint32
Base uint32
NumberOfFunctions uint32
NumberOfNames uint32
AddressOfFunctions uint32 // RVA from base of image
AddressOfNames uint32 // RVA from base of image
AddressOfNameOrdinals uint32 // RVA from base of image
}
type IMAGE_IMPORT_BY_NAME struct {
Hint uint16
Name [1]byte
}
func IMAGE_ORDINAL(ordinal uintptr) uintptr {
return ordinal & 0xffff
}
func IMAGE_SNAP_BY_ORDINAL(ordinal uintptr) bool {
return (ordinal & IMAGE_ORDINAL_FLAG) != 0
}
// Thread Local Storage
type IMAGE_TLS_DIRECTORY struct {
StartAddressOfRawData uintptr
EndAddressOfRawData uintptr
AddressOfIndex uintptr // PDWORD
AddressOfCallbacks uintptr // PIMAGE_TLS_CALLBACK *;
SizeOfZeroFill uint32
Characteristics uint32
}
type IMAGE_IMPORT_DESCRIPTOR struct {
characteristicsOrOriginalFirstThunk uint32 // 0 for terminating null import descriptor
// RVA to original unbound IAT (PIMAGE_THUNK_DATA)
TimeDateStamp uint32 // 0 if not bound,
// -1 if bound, and real date\time stamp
// in IMAGE_DIRECTORY_ENTRY_BOUND_IMPORT (new BIND)
// O.W. date/time stamp of DLL bound to (Old BIND)
ForwarderChain uint32 // -1 if no forwarders
Name uint32
FirstThunk uint32 // RVA to IAT (if bound this IAT has actual addresses)
}
func (imgimpdesc *IMAGE_IMPORT_DESCRIPTOR) Characteristics() uint32 {
return imgimpdesc.characteristicsOrOriginalFirstThunk
}
func (imgimpdesc *IMAGE_IMPORT_DESCRIPTOR) OriginalFirstThunk() uint32 {
return imgimpdesc.characteristicsOrOriginalFirstThunk
}
type IMAGE_DELAYLOAD_DESCRIPTOR struct {
Attributes uint32
DllNameRVA uint32
ModuleHandleRVA uint32
ImportAddressTableRVA uint32
ImportNameTableRVA uint32
BoundImportAddressTableRVA uint32
UnloadInformationTableRVA uint32
TimeDateStamp uint32
}
type IMAGE_LOAD_CONFIG_CODE_INTEGRITY struct {
Flags uint16
Catalog uint16
CatalogOffset uint32
Reserved uint32
}
const (
IMAGE_GUARD_CF_INSTRUMENTED = 0x00000100
IMAGE_GUARD_CFW_INSTRUMENTED = 0x00000200
IMAGE_GUARD_CF_FUNCTION_TABLE_PRESENT = 0x00000400
IMAGE_GUARD_SECURITY_COOKIE_UNUSED = 0x00000800
IMAGE_GUARD_PROTECT_DELAYLOAD_IAT = 0x00001000
IMAGE_GUARD_DELAYLOAD_IAT_IN_ITS_OWN_SECTION = 0x00002000
IMAGE_GUARD_CF_EXPORT_SUPPRESSION_INFO_PRESENT = 0x00004000
IMAGE_GUARD_CF_ENABLE_EXPORT_SUPPRESSION = 0x00008000
IMAGE_GUARD_CF_LONGJUMP_TABLE_PRESENT = 0x00010000
IMAGE_GUARD_RF_INSTRUMENTED = 0x00020000
IMAGE_GUARD_RF_ENABLE = 0x00040000
IMAGE_GUARD_RF_STRICT = 0x00080000
IMAGE_GUARD_RETPOLINE_PRESENT = 0x00100000
IMAGE_GUARD_EH_CONTINUATION_TABLE_PRESENT = 0x00400000
IMAGE_GUARD_XFG_ENABLED = 0x00800000
IMAGE_GUARD_CF_FUNCTION_TABLE_SIZE_MASK = 0xF0000000
IMAGE_GUARD_CF_FUNCTION_TABLE_SIZE_SHIFT = 28
)
type IMAGE_RUNTIME_FUNCTION_ENTRY struct {
BeginAddress uint32
EndAddress uint32
UnwindInfoAddress uint32
}
const (
DLL_PROCESS_ATTACH = 1
DLL_THREAD_ATTACH = 2
DLL_THREAD_DETACH = 3
DLL_PROCESS_DETACH = 0
)
type SYSTEM_INFO struct {
ProcessorArchitecture uint16
Reserved uint16
PageSize uint32
MinimumApplicationAddress uintptr
MaximumApplicationAddress uintptr
ActiveProcessorMask uintptr
NumberOfProcessors uint32
ProcessorType uint32
AllocationGranularity uint32
ProcessorLevel uint16
ProcessorRevision uint16
}

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@ -1,96 +0,0 @@
// +build windows,386 windows,arm
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
*/
package memmod
// Optional header format
type IMAGE_OPTIONAL_HEADER struct {
Magic uint16
MajorLinkerVersion uint8
MinorLinkerVersion uint8
SizeOfCode uint32
SizeOfInitializedData uint32
SizeOfUninitializedData uint32
AddressOfEntryPoint uint32
BaseOfCode uint32
BaseOfData uint32
ImageBase uintptr
SectionAlignment uint32
FileAlignment uint32
MajorOperatingSystemVersion uint16
MinorOperatingSystemVersion uint16
MajorImageVersion uint16
MinorImageVersion uint16
MajorSubsystemVersion uint16
MinorSubsystemVersion uint16
Win32VersionValue uint32
SizeOfImage uint32
SizeOfHeaders uint32
CheckSum uint32
Subsystem uint16
DllCharacteristics uint16
SizeOfStackReserve uintptr
SizeOfStackCommit uintptr
SizeOfHeapReserve uintptr
SizeOfHeapCommit uintptr
LoaderFlags uint32
NumberOfRvaAndSizes uint32
DataDirectory [IMAGE_NUMBEROF_DIRECTORY_ENTRIES]IMAGE_DATA_DIRECTORY
}
const IMAGE_ORDINAL_FLAG uintptr = 0x80000000
type IMAGE_LOAD_CONFIG_DIRECTORY struct {
Size uint32
TimeDateStamp uint32
MajorVersion uint16
MinorVersion uint16
GlobalFlagsClear uint32
GlobalFlagsSet uint32
CriticalSectionDefaultTimeout uint32
DeCommitFreeBlockThreshold uint32
DeCommitTotalFreeThreshold uint32
LockPrefixTable uint32
MaximumAllocationSize uint32
VirtualMemoryThreshold uint32
ProcessHeapFlags uint32
ProcessAffinityMask uint32
CSDVersion uint16
DependentLoadFlags uint16
EditList uint32
SecurityCookie uint32
SEHandlerTable uint32
SEHandlerCount uint32
GuardCFCheckFunctionPointer uint32
GuardCFDispatchFunctionPointer uint32
GuardCFFunctionTable uint32
GuardCFFunctionCount uint32
GuardFlags uint32
CodeIntegrity IMAGE_LOAD_CONFIG_CODE_INTEGRITY
GuardAddressTakenIatEntryTable uint32
GuardAddressTakenIatEntryCount uint32
GuardLongJumpTargetTable uint32
GuardLongJumpTargetCount uint32
DynamicValueRelocTable uint32
CHPEMetadataPointer uint32
GuardRFFailureRoutine uint32
GuardRFFailureRoutineFunctionPointer uint32
DynamicValueRelocTableOffset uint32
DynamicValueRelocTableSection uint16
Reserved2 uint16
GuardRFVerifyStackPointerFunctionPointer uint32
HotPatchTableOffset uint32
Reserved3 uint32
EnclaveConfigurationPointer uint32
VolatileMetadataPointer uint32
GuardEHContinuationTable uint32
GuardEHContinuationCount uint32
GuardXFGCheckFunctionPointer uint32
GuardXFGDispatchFunctionPointer uint32
GuardXFGTableDispatchFunctionPointer uint32
CastGuardOsDeterminedFailureMode uint32
}

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@ -1,95 +0,0 @@
// +build windows,amd64 windows,arm64
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
*/
package memmod
// Optional header format
type IMAGE_OPTIONAL_HEADER struct {
Magic uint16
MajorLinkerVersion uint8
MinorLinkerVersion uint8
SizeOfCode uint32
SizeOfInitializedData uint32
SizeOfUninitializedData uint32
AddressOfEntryPoint uint32
BaseOfCode uint32
ImageBase uintptr
SectionAlignment uint32
FileAlignment uint32
MajorOperatingSystemVersion uint16
MinorOperatingSystemVersion uint16
MajorImageVersion uint16
MinorImageVersion uint16
MajorSubsystemVersion uint16
MinorSubsystemVersion uint16
Win32VersionValue uint32
SizeOfImage uint32
SizeOfHeaders uint32
CheckSum uint32
Subsystem uint16
DllCharacteristics uint16
SizeOfStackReserve uintptr
SizeOfStackCommit uintptr
SizeOfHeapReserve uintptr
SizeOfHeapCommit uintptr
LoaderFlags uint32
NumberOfRvaAndSizes uint32
DataDirectory [IMAGE_NUMBEROF_DIRECTORY_ENTRIES]IMAGE_DATA_DIRECTORY
}
const IMAGE_ORDINAL_FLAG uintptr = 0x8000000000000000
type IMAGE_LOAD_CONFIG_DIRECTORY struct {
Size uint32
TimeDateStamp uint32
MajorVersion uint16
MinorVersion uint16
GlobalFlagsClear uint32
GlobalFlagsSet uint32
CriticalSectionDefaultTimeout uint32
DeCommitFreeBlockThreshold uint64
DeCommitTotalFreeThreshold uint64
LockPrefixTable uint64
MaximumAllocationSize uint64
VirtualMemoryThreshold uint64
ProcessAffinityMask uint64
ProcessHeapFlags uint32
CSDVersion uint16
DependentLoadFlags uint16
EditList uint64
SecurityCookie uint64
SEHandlerTable uint64
SEHandlerCount uint64
GuardCFCheckFunctionPointer uint64
GuardCFDispatchFunctionPointer uint64
GuardCFFunctionTable uint64
GuardCFFunctionCount uint64
GuardFlags uint32
CodeIntegrity IMAGE_LOAD_CONFIG_CODE_INTEGRITY
GuardAddressTakenIatEntryTable uint64
GuardAddressTakenIatEntryCount uint64
GuardLongJumpTargetTable uint64
GuardLongJumpTargetCount uint64
DynamicValueRelocTable uint64
CHPEMetadataPointer uint64
GuardRFFailureRoutine uint64
GuardRFFailureRoutineFunctionPointer uint64
DynamicValueRelocTableOffset uint32
DynamicValueRelocTableSection uint16
Reserved2 uint16
GuardRFVerifyStackPointerFunctionPointer uint64
HotPatchTableOffset uint32
Reserved3 uint32
EnclaveConfigurationPointer uint64
VolatileMetadataPointer uint64
GuardEHContinuationTable uint64
GuardEHContinuationCount uint64
GuardXFGCheckFunctionPointer uint64
GuardXFGDispatchFunctionPointer uint64
GuardXFGTableDispatchFunctionPointer uint64
CastGuardOsDeterminedFailureMode uint64
}

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/* 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
}
unsafeSlice(unsafe.Pointer(&packet), unsafe.Pointer(r0), int(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
}
unsafeSlice(unsafe.Pointer(&packet), unsafe.Pointer(r0), int(packetSize))
return
}
func (session Session) SendPacket(packet []byte) {
syscall.Syscall(procWintunSendPacket.Addr(), 2, session.handle, uintptr(unsafe.Pointer(&packet[0])), 0)
}
// 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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@ -1,215 +0,0 @@
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
*/
package wintun
import (
"errors"
"log"
"runtime"
"syscall"
"unsafe"
"golang.org/x/sys/windows"
)
type loggerLevel int
const (
logInfo loggerLevel = iota
logWarn
logErr
)
const (
PoolNameMax = 256
AdapterNameMax = 128
)
type Pool [PoolNameMax]uint16
type Adapter struct {
handle uintptr
}
var (
modwintun = newLazyDLL("wintun.dll", setupLogger)
procWintunCreateAdapter = modwintun.NewProc("WintunCreateAdapter")
procWintunDeleteAdapter = modwintun.NewProc("WintunDeleteAdapter")
procWintunDeletePoolDriver = modwintun.NewProc("WintunDeletePoolDriver")
procWintunEnumAdapters = modwintun.NewProc("WintunEnumAdapters")
procWintunFreeAdapter = modwintun.NewProc("WintunFreeAdapter")
procWintunOpenAdapter = modwintun.NewProc("WintunOpenAdapter")
procWintunGetAdapterLUID = modwintun.NewProc("WintunGetAdapterLUID")
procWintunGetAdapterName = modwintun.NewProc("WintunGetAdapterName")
procWintunGetRunningDriverVersion = modwintun.NewProc("WintunGetRunningDriverVersion")
procWintunSetAdapterName = modwintun.NewProc("WintunSetAdapterName")
)
func setupLogger(dll *lazyDLL) {
syscall.Syscall(dll.NewProc("WintunSetLogger").Addr(), 1, windows.NewCallback(func(level loggerLevel, msg *uint16) int {
log.Println("[Wintun]", windows.UTF16PtrToString(msg))
return 0
}), 0, 0)
}
func MakePool(poolName string) (pool *Pool, err error) {
poolName16, err := windows.UTF16FromString(poolName)
if err != nil {
return
}
if len(poolName16) > PoolNameMax {
err = errors.New("Pool name too long")
return
}
pool = &Pool{}
copy(pool[:], poolName16)
return
}
func (pool *Pool) String() string {
return windows.UTF16ToString(pool[:])
}
func freeAdapter(wintun *Adapter) {
syscall.Syscall(procWintunFreeAdapter.Addr(), 1, uintptr(wintun.handle), 0, 0)
}
// OpenAdapter finds a Wintun adapter by its name. This function returns the adapter if found, or
// windows.ERROR_FILE_NOT_FOUND otherwise. If the adapter is found but not a Wintun-class or a
// member of the pool, this function returns windows.ERROR_ALREADY_EXISTS. The adapter must be
// released after use.
func (pool *Pool) OpenAdapter(ifname string) (wintun *Adapter, err error) {
ifname16, err := windows.UTF16PtrFromString(ifname)
if err != nil {
return nil, err
}
r0, _, e1 := syscall.Syscall(procWintunOpenAdapter.Addr(), 2, uintptr(unsafe.Pointer(pool)), uintptr(unsafe.Pointer(ifname16)), 0)
if r0 == 0 {
err = e1
return
}
wintun = &Adapter{r0}
runtime.SetFinalizer(wintun, freeAdapter)
return
}
// CreateAdapter creates a Wintun adapter. ifname is the requested name of the adapter, while
// requestedGUID is the GUID of the created network adapter, which then influences NLA generation
// deterministically. If it is set to nil, the GUID is chosen by the system at random, and hence a
// new NLA entry is created for each new adapter. It is called "requested" GUID because the API it
// uses is completely undocumented, and so there could be minor interesting complications with its
// usage. This function returns the network adapter ID and a flag if reboot is required.
func (pool *Pool) CreateAdapter(ifname string, requestedGUID *windows.GUID) (wintun *Adapter, rebootRequired bool, err error) {
var ifname16 *uint16
ifname16, err = windows.UTF16PtrFromString(ifname)
if err != nil {
return
}
var _p0 uint32
r0, _, e1 := syscall.Syscall6(procWintunCreateAdapter.Addr(), 4, uintptr(unsafe.Pointer(pool)), uintptr(unsafe.Pointer(ifname16)), uintptr(unsafe.Pointer(requestedGUID)), uintptr(unsafe.Pointer(&_p0)), 0, 0)
rebootRequired = _p0 != 0
if r0 == 0 {
err = e1
return
}
wintun = &Adapter{r0}
runtime.SetFinalizer(wintun, freeAdapter)
return
}
// Delete deletes a Wintun adapter. This function succeeds if the adapter was not found. It returns
// a bool indicating whether a reboot is required.
func (wintun *Adapter) Delete(forceCloseSessions bool) (rebootRequired bool, err error) {
var _p0 uint32
if forceCloseSessions {
_p0 = 1
}
var _p1 uint32
r1, _, e1 := syscall.Syscall(procWintunDeleteAdapter.Addr(), 3, uintptr(wintun.handle), uintptr(_p0), uintptr(unsafe.Pointer(&_p1)))
rebootRequired = _p1 != 0
if r1 == 0 {
err = e1
}
return
}
// DeleteMatchingAdapters deletes all Wintun adapters, which match
// given criteria, and returns which ones it deleted, whether a reboot
// is required after, and which errors occurred during the process.
func (pool *Pool) DeleteMatchingAdapters(matches func(adapter *Adapter) bool, forceCloseSessions bool) (rebootRequired bool, errors []error) {
cb := func(handle uintptr, _ uintptr) int {
adapter := &Adapter{handle}
if !matches(adapter) {
return 1
}
rebootRequired2, err := adapter.Delete(forceCloseSessions)
if err != nil {
errors = append(errors, err)
return 1
}
rebootRequired = rebootRequired || rebootRequired2
return 1
}
r1, _, e1 := syscall.Syscall(procWintunEnumAdapters.Addr(), 3, uintptr(unsafe.Pointer(pool)), uintptr(windows.NewCallback(cb)), 0)
if r1 == 0 {
errors = append(errors, e1)
}
return
}
// Name returns the name of the Wintun adapter.
func (wintun *Adapter) Name() (ifname string, err error) {
var ifname16 [AdapterNameMax]uint16
r1, _, e1 := syscall.Syscall(procWintunGetAdapterName.Addr(), 2, uintptr(wintun.handle), uintptr(unsafe.Pointer(&ifname16[0])), 0)
if r1 == 0 {
err = e1
return
}
ifname = windows.UTF16ToString(ifname16[:])
return
}
// DeleteDriver deletes all Wintun adapters in a pool and if there are no more adapters in any other
// pools, also removes Wintun from the driver store, usually called by uninstallers.
func (pool *Pool) DeleteDriver() (rebootRequired bool, err error) {
var _p0 uint32
r1, _, e1 := syscall.Syscall(procWintunDeletePoolDriver.Addr(), 2, uintptr(unsafe.Pointer(pool)), uintptr(unsafe.Pointer(&_p0)), 0)
rebootRequired = _p0 != 0
if r1 == 0 {
err = e1
}
return
}
// SetName sets name of the Wintun adapter.
func (wintun *Adapter) SetName(ifname string) (err error) {
ifname16, err := windows.UTF16FromString(ifname)
if err != nil {
return err
}
r1, _, e1 := syscall.Syscall(procWintunSetAdapterName.Addr(), 2, uintptr(wintun.handle), uintptr(unsafe.Pointer(&ifname16[0])), 0)
if r1 == 0 {
err = e1
}
return
}
// RunningVersion returns the version of the running Wintun driver.
func RunningVersion() (version uint32, err error) {
r0, _, e1 := syscall.Syscall(procWintunGetRunningDriverVersion.Addr(), 0, 0, 0, 0)
version = uint32(r0)
if version == 0 {
err = e1
}
return
}
// LUID returns the LUID of the adapter.
func (wintun *Adapter) LUID() (luid uint64) {
syscall.Syscall(procWintunGetAdapterLUID.Addr(), 2, uintptr(wintun.handle), uintptr(unsafe.Pointer(&luid)), 0)
return
}