fix: add i,j params size limitation

fix: restore Dockerfile changes

.github/workflows/build-if-tag.yml

@@ -0,0 +1,41 @@
+name: build-if-tag
+
+on:
+  push:
+    tags:
+      - 'v[0-9]+.[0-9]+.[0-9]+'
+
+env:
+  APP: amneziawg-go
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    name: build
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ github.ref_name }}
+
+      - name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Setup metadata
+        uses: docker/metadata-action@v5
+        id: metadata
+        with:
+          images: amneziavpn/${{ env.APP }}
+          tags: type=semver,pattern={{version}}
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Build
+        uses: docker/build-push-action@v5
+        with:
+          push: true
+          tags: ${{ steps.metadata.outputs.tags }}

.gitignore

@@ -1 +1 @@
-wireguard-go
+amneziawg-go

Dockerfile

@@ -0,0 +1,18 @@
+FROM golang:1.24.4 as awg
+COPY . /awg
+WORKDIR /awg
+RUN go mod download && \
+    go mod verify && \
+    go build -ldflags '-linkmode external -extldflags "-fno-PIC -static"' -v -o /usr/bin
+
+FROM alpine:3.19
+ARG AWGTOOLS_RELEASE="1.0.20241018"
+
+RUN apk --no-cache add iproute2 iptables bash && \
+    cd /usr/bin/ && \
+    wget https://github.com/amnezia-vpn/amneziawg-tools/releases/download/v${AWGTOOLS_RELEASE}/alpine-3.19-amneziawg-tools.zip && \
+    unzip -j alpine-3.19-amneziawg-tools.zip && \
+    chmod +x /usr/bin/awg /usr/bin/awg-quick && \
+    ln -s /usr/bin/awg /usr/bin/wg && \
+    ln -s /usr/bin/awg-quick /usr/bin/wg-quick
+COPY --from=awg /usr/bin/amneziawg-go /usr/bin/amneziawg-go

Makefile

@@ -9,23 +9,23 @@ MAKEFLAGS += --no-print-directory
 
 generate-version-and-build:
 	@export GIT_CEILING_DIRECTORIES="$(realpath $(CURDIR)/..)" && \
-	tag="$$(git describe --dirty 2>/dev/null)" && \
+	tag="$$(git describe --tags --dirty 2>/dev/null)" && \
 	ver="$$(printf 'package main\n\nconst Version = "%s"\n' "$$tag")" && \
 	[ "$$(cat version.go 2>/dev/null)" != "$$ver" ] && \
 	echo "$$ver" > version.go && \
 	git update-index --assume-unchanged version.go || true
-	@$(MAKE) wireguard-go
+	@$(MAKE) amneziawg-go
 
-wireguard-go: $(wildcard *.go) $(wildcard */*.go)
+amneziawg-go: $(wildcard *.go) $(wildcard */*.go)
 	go build -v -o "$@"
 
-install: wireguard-go
-	@install -v -d "$(DESTDIR)$(BINDIR)" && install -v -m 0755 "$<" "$(DESTDIR)$(BINDIR)/wireguard-go"
+install: amneziawg-go
+	@install -v -d "$(DESTDIR)$(BINDIR)" && install -v -m 0755 "$<" "$(DESTDIR)$(BINDIR)/amneziawg-go"
 
 test:
 	go test ./...
 
 clean:
-	rm -f wireguard-go
+	rm -f amneziawg-go
 
 .PHONY: all clean test install generate-version-and-build

README.md

@@ -1,24 +1,27 @@
-# Go Implementation of [WireGuard](https://www.wireguard.com/)
+# Go Implementation of AmneziaWG
 
-This is an implementation of WireGuard in Go.
+AmneziaWG is a contemporary version of the WireGuard protocol. It's a fork of WireGuard-Go and offers protection against detection by Deep Packet Inspection (DPI) systems. At the same time, it retains the simplified architecture and high performance of the original.
+
+The precursor, WireGuard, is known for its efficiency but had issues with detection due to its distinctive packet signatures.
+AmneziaWG addresses this problem by employing advanced obfuscation methods, allowing its traffic to blend seamlessly with regular internet traffic.
+As a result, AmneziaWG maintains high performance while adding an extra layer of stealth, making it a superb choice for those seeking a fast and discreet VPN connection.
 
 ## Usage
 
-Most Linux kernel WireGuard users are used to adding an interface with `ip link add wg0 type wireguard`. With wireguard-go, instead simply run:
+Simply run:
 
 ```
-$ wireguard-go wg0
+$ amneziawg-go wg0
 ```
 
-This will create an interface and fork into the background. To remove the interface, use the usual `ip link del wg0`, or if your system does not support removing interfaces directly, you may instead remove the control socket via `rm -f /var/run/wireguard/wg0.sock`, which will result in wireguard-go shutting down.
+This will create an interface and fork into the background. To remove the interface, use the usual `ip link del wg0`, or if your system does not support removing interfaces directly, you may instead remove the control socket via `rm -f /var/run/amneziawg/wg0.sock`, which will result in amneziawg-go shutting down.
 
-To run wireguard-go without forking to the background, pass `-f` or `--foreground`:
+To run amneziawg-go without forking to the background, pass `-f` or `--foreground`:
 
 ```
-$ wireguard-go -f wg0
+$ amneziawg-go -f wg0
 ```
-
-When an interface is running, you may use [`wg(8)`](https://git.zx2c4.com/wireguard-tools/about/src/man/wg.8) to configure it, as well as the usual `ip(8)` and `ifconfig(8)` commands.
+When an interface is running, you may use [`amneziawg-tools `](https://github.com/amnezia-vpn/amneziawg-tools) to configure it, as well as the usual `ip(8)` and `ifconfig(8)` commands.
 
 To run with more logging you may set the environment variable `LOG_LEVEL=debug`.
 
@@ -26,52 +29,25 @@ To run with more logging you may set the environment variable `LOG_LEVEL=debug`.
 
 ### Linux
 
-This will run on Linux; however you should instead use the kernel module, which is faster and better integrated into the OS. See the [installation page](https://www.wireguard.com/install/) for instructions.
+This will run on Linux; you should run amnezia-wg instead of using default linux kernel module.
 
 ### macOS
 
 This runs on macOS using the utun driver. It does not yet support sticky sockets, and won't support fwmarks because of Darwin limitations. Since the utun driver cannot have arbitrary interface names, you must either use `utun[0-9]+` for an explicit interface name or `utun` to have the kernel select one for you. If you choose `utun` as the interface name, and the environment variable `WG_TUN_NAME_FILE` is defined, then the actual name of the interface chosen by the kernel is written to the file specified by that variable.
+This runs on MacOS, you should use it from [amneziawg-apple](https://github.com/amnezia-vpn/amneziawg-apple)
 
 ### Windows
 
-This runs on Windows, but you should instead use it from the more [fully featured Windows app](https://git.zx2c4.com/wireguard-windows/about/), which uses this as a module.
+This runs on Windows, you should use it from [amneziawg-windows](https://github.com/amnezia-vpn/amneziawg-windows), which uses this as a module.
 
-### FreeBSD
-
-This will run on FreeBSD. It does not yet support sticky sockets. Fwmark is mapped to `SO_USER_COOKIE`.
-
-### OpenBSD
-
-This will run on OpenBSD. It does not yet support sticky sockets. Fwmark is mapped to `SO_RTABLE`. Since the tun driver cannot have arbitrary interface names, you must either use `tun[0-9]+` for an explicit interface name or `tun` to have the program select one for you. If you choose `tun` as the interface name, and the environment variable `WG_TUN_NAME_FILE` is defined, then the actual name of the interface chosen by the kernel is written to the file specified by that variable.
 
 ## Building
 
 This requires an installation of the latest version of [Go](https://go.dev/).
 
 ```
-$ git clone https://git.zx2c4.com/wireguard-go
-$ cd wireguard-go
+$ git clone https://github.com/amnezia-vpn/amneziawg-go
+$ cd amneziawg-go
 $ make
 ```
-
-## License
-
-    Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
-    
-    Permission is hereby granted, free of charge, to any person obtaining a copy of
-    this software and associated documentation files (the "Software"), to deal in
-    the Software without restriction, including without limitation the rights to
-    use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
-    of the Software, and to permit persons to whom the Software is furnished to do
-    so, subject to the following conditions:
-    
-    The above copyright notice and this permission notice shall be included in all
-    copies or substantial portions of the Software.
-    
-    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-    SOFTWARE.
+ 

conn/bind_std.go

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package conn
@@ -331,7 +331,7 @@ type ErrUDPGSODisabled struct {
 }
 
 func (e ErrUDPGSODisabled) Error() string {
-	return fmt.Sprintf("disabled UDP GSO on %s, NIC(s) may not support checksum offload", e.onLaddr)
+	return fmt.Sprintf("disabled UDP GSO on %s, NIC(s) may not support checksum offload or peer MTU with protocol headers is greater than path MTU", e.onLaddr)
 }
 
 func (e ErrUDPGSODisabled) Unwrap() error {

conn/bind_windows.go

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package conn
@@ -17,7 +17,7 @@ import (
 
 	"golang.org/x/sys/windows"
 
-	"golang.zx2c4.com/wireguard/conn/winrio"
+	"github.com/amnezia-vpn/amneziawg-go/conn/winrio"
 )
 
 const (

conn/bindtest/bindtest.go

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package bindtest
@@ -12,7 +12,7 @@ import (
 	"net/netip"
 	"os"
 
-	"golang.zx2c4.com/wireguard/conn"
+	"github.com/amnezia-vpn/amneziawg-go/conn"
 )
 
 type ChannelBind struct {

conn/boundif_android.go

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package conn

conn/conn.go

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 // Package conn implements WireGuard's network connections.

conn/conn_test.go

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package conn

conn/controlfns.go

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package conn

conn/controlfns_linux.go

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package conn
@@ -13,6 +13,35 @@ import (
 	"golang.org/x/sys/unix"
 )
 
+// Taken from go/src/internal/syscall/unix/kernel_version_linux.go
+func kernelVersion() (major, minor int) {
+	var uname unix.Utsname
+	if err := unix.Uname(&uname); err != nil {
+		return
+	}
+
+	var (
+		values    [2]int
+		value, vi int
+	)
+	for _, c := range uname.Release {
+		if '0' <= c && c <= '9' {
+			value = (value * 10) + int(c-'0')
+		} else {
+			// Note that we're assuming N.N.N here.
+			// If we see anything else, we are likely to mis-parse it.
+			values[vi] = value
+			vi++
+			if vi >= len(values) {
+				break
+			}
+			value = 0
+		}
+	}
+
+	return values[0], values[1]
+}
+
 func init() {
 	controlFns = append(controlFns,
 
@@ -60,6 +89,17 @@ func init() {
 
 		// Attempt to enable UDP_GRO
 		func(network, address string, c syscall.RawConn) error {
+			// Kernels below 5.12 are missing 98184612aca0 ("net:
+			// udp: Add support for getsockopt(..., ..., UDP_GRO,
+			// ..., ...);"), which means we can't read this back
+			// later. We could pipe the return value through to
+			// the rest of the code, but UDP_GRO is kind of buggy
+			// anyway, so just gate this here.
+			major, minor := kernelVersion()
+			if major < 5 || (major == 5 && minor < 12) {
+				return nil
+			}
+
 			c.Control(func(fd uintptr) {
 				_ = unix.SetsockoptInt(int(fd), unix.IPPROTO_UDP, unix.UDP_GRO, 1)
 			})

conn/controlfns_unix.go

@@ -2,7 +2,7 @@
 
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package conn

conn/controlfns_windows.go

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package conn

conn/default.go

@@ -2,7 +2,7 @@
 
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package conn

conn/errors_default.go

@@ -2,11 +2,11 @@
 
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package conn
 
-func errShouldDisableUDPGSO(err error) bool {
+func errShouldDisableUDPGSO(_ error) bool {
 	return false
 }

conn/errors_linux.go

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package conn
@@ -20,7 +20,9 @@ func errShouldDisableUDPGSO(err error) bool {
 		// See:
 		// https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/man7/udp.7?id=806eabd74910447f21005160e90957bde4db0183#n228
 		// https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/net/ipv4/udp.c?h=v6.2&id=c9c3395d5e3dcc6daee66c6908354d47bf98cb0c#n942
-		return serr.Err == unix.EIO
+		// If gso_size + udp + ip headers > fragment size EINVAL is returned.
+		// It occurs when the peer mtu + wg headers is greater than path mtu.
+		return serr.Err == unix.EIO || serr.Err == unix.EINVAL
 	}
 	return false
 }

conn/features_default.go

@@ -3,13 +3,13 @@
 
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package conn
 
 import "net"
 
-func supportsUDPOffload(conn *net.UDPConn) (txOffload, rxOffload bool) {
+func supportsUDPOffload(_ *net.UDPConn) (txOffload, rxOffload bool) {
 	return
 }

conn/features_linux.go

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package conn
@@ -19,8 +19,10 @@ func supportsUDPOffload(conn *net.UDPConn) (txOffload, rxOffload bool) {
 	err = rc.Control(func(fd uintptr) {
 		_, errSyscall := unix.GetsockoptInt(int(fd), unix.IPPROTO_UDP, unix.UDP_SEGMENT)
 		txOffload = errSyscall == nil
-		opt, errSyscall := unix.GetsockoptInt(int(fd), unix.IPPROTO_UDP, unix.UDP_GRO)
-		rxOffload = errSyscall == nil && opt == 1
+		// getsockopt(IPPROTO_UDP, UDP_GRO) is not supported in android
+		// use setsockopt workaround
+		errSyscall = unix.SetsockoptInt(int(fd), unix.IPPROTO_UDP, unix.UDP_GRO, 1)
+		rxOffload = errSyscall == nil
 	})
 	if err != nil {
 		return false, false

conn/gso_default.go

@@ -2,7 +2,7 @@
 
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package conn

conn/gso_linux.go

@@ -2,7 +2,7 @@
 
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package conn

conn/mark_default.go

@@ -2,7 +2,7 @@
 
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package conn

conn/mark_unix.go

@@ -2,7 +2,7 @@
 
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package conn

conn/sticky_default.go

@@ -2,7 +2,7 @@
 
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package conn

conn/sticky_linux.go

@@ -2,7 +2,7 @@
 
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package conn

conn/sticky_linux_test.go

@@ -2,7 +2,7 @@
 
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package conn

conn/winrio/rio_windows.go

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package winrio

device/allowedips.go

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package device
@@ -223,6 +223,60 @@ func (table *AllowedIPs) EntriesForPeer(peer *Peer, cb func(prefix netip.Prefix)
 	}
 }
 
+func (node *trieEntry) remove() {
+	node.removeFromPeerEntries()
+	node.peer = nil
+	if node.child[0] != nil && node.child[1] != nil {
+		return
+	}
+	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()
+		return
+	}
+	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()
+		return
+	}
+	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) Remove(prefix netip.Prefix, peer *Peer) {
+	table.mutex.Lock()
+	defer table.mutex.Unlock()
+	var node *trieEntry
+	var exact bool
+
+	if prefix.Addr().Is6() {
+		ip := prefix.Addr().As16()
+		node, exact = table.IPv6.nodePlacement(ip[:], uint8(prefix.Bits()))
+	} else if prefix.Addr().Is4() {
+		ip := prefix.Addr().As4()
+		node, exact = table.IPv4.nodePlacement(ip[:], uint8(prefix.Bits()))
+	} else {
+		panic(errors.New("removing unknown address type"))
+	}
+	if !exact || node == nil || peer != node.peer {
+		return
+	}
+	node.remove()
+}
+
 func (table *AllowedIPs) RemoveByPeer(peer *Peer) {
 	table.mutex.Lock()
 	defer table.mutex.Unlock()
@@ -230,38 +284,7 @@ func (table *AllowedIPs) RemoveByPeer(peer *Peer) {
 	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()
+		elem.Value.(*trieEntry).remove()
 	}
 }
 

device/allowedips_rand_test.go

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package device
@@ -83,7 +83,7 @@ func TestTrieRandom(t *testing.T) {
 	var peers []*Peer
 	var allowedIPs AllowedIPs
 
-	rand.Seed(1)
+	rng := rand.New(rand.NewSource(1))
 
 	for n := 0; n < NumberOfPeers; n++ {
 		peers = append(peers, &Peer{})
@@ -91,14 +91,14 @@ func TestTrieRandom(t *testing.T) {
 
 	for n := 0; n < NumberOfAddresses; n++ {
 		var addr4 [4]byte
-		rand.Read(addr4[:])
+		rng.Read(addr4[:])
 		cidr := uint8(rand.Intn(32) + 1)
 		index := rand.Intn(NumberOfPeers)
 		allowedIPs.Insert(netip.PrefixFrom(netip.AddrFrom4(addr4), int(cidr)), peers[index])
 		slow4 = slow4.Insert(addr4[:], cidr, peers[index])
 
 		var addr6 [16]byte
-		rand.Read(addr6[:])
+		rng.Read(addr6[:])
 		cidr = uint8(rand.Intn(128) + 1)
 		index = rand.Intn(NumberOfPeers)
 		allowedIPs.Insert(netip.PrefixFrom(netip.AddrFrom16(addr6), int(cidr)), peers[index])
@@ -109,7 +109,7 @@ func TestTrieRandom(t *testing.T) {
 	for p = 0; ; p++ {
 		for n := 0; n < NumberOfTests; n++ {
 			var addr4 [4]byte
-			rand.Read(addr4[:])
+			rng.Read(addr4[:])
 			peer1 := slow4.Lookup(addr4[:])
 			peer2 := allowedIPs.Lookup(addr4[:])
 			if peer1 != peer2 {
@@ -117,7 +117,7 @@ func TestTrieRandom(t *testing.T) {
 			}
 
 			var addr6 [16]byte
-			rand.Read(addr6[:])
+			rng.Read(addr6[:])
 			peer1 = slow6.Lookup(addr6[:])
 			peer2 = allowedIPs.Lookup(addr6[:])
 			if peer1 != peer2 {

device/allowedips_test.go

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package device
@@ -39,12 +39,12 @@ func TestCommonBits(t *testing.T) {
 	}
 }
 
-func benchmarkTrie(peerNumber, addressNumber, addressLength int, b *testing.B) {
+func benchmarkTrie(peerNumber, addressNumber, _ int, b *testing.B) {
 	var trie *trieEntry
 	var peers []*Peer
 	root := parentIndirection{&trie, 2}
 
-	rand.Seed(1)
+	rng := rand.New(rand.NewSource(1))
 
 	const AddressLength = 4
 
@@ -54,15 +54,15 @@ func benchmarkTrie(peerNumber, addressNumber, addressLength int, b *testing.B) {
 
 	for n := 0; n < addressNumber; n++ {
 		var addr [AddressLength]byte
-		rand.Read(addr[:])
-		cidr := uint8(rand.Uint32() % (AddressLength * 8))
-		index := rand.Int() % peerNumber
+		rng.Read(addr[:])
+		cidr := uint8(rng.Uint32() % (AddressLength * 8))
+		index := rng.Int() % peerNumber
 		root.insert(addr[:], cidr, peers[index])
 	}
 
 	for n := 0; n < b.N; n++ {
 		var addr [AddressLength]byte
-		rand.Read(addr[:])
+		rng.Read(addr[:])
 		trie.lookup(addr[:])
 	}
 }
@@ -101,6 +101,10 @@ func TestTrieIPv4(t *testing.T) {
 		allowedIPs.Insert(netip.PrefixFrom(netip.AddrFrom4([4]byte{a, b, c, d}), int(cidr)), peer)
 	}
 
+	remove := func(peer *Peer, a, b, c, d byte, cidr uint8) {
+		allowedIPs.Remove(netip.PrefixFrom(netip.AddrFrom4([4]byte{a, b, c, d}), int(cidr)), peer)
+	}
+
 	assertEQ := func(peer *Peer, a, b, c, d byte) {
 		p := allowedIPs.Lookup([]byte{a, b, c, d})
 		if p != peer {
@@ -176,6 +180,21 @@ func TestTrieIPv4(t *testing.T) {
 	allowedIPs.RemoveByPeer(a)
 
 	assertNEQ(a, 192, 168, 0, 1)
+
+	insert(a, 1, 0, 0, 0, 32)
+	insert(a, 192, 0, 0, 0, 24)
+	assertEQ(a, 1, 0, 0, 0)
+	assertEQ(a, 192, 0, 0, 1)
+	remove(a, 192, 0, 0, 0, 32)
+	assertEQ(a, 192, 0, 0, 1)
+	remove(nil, 192, 0, 0, 0, 24)
+	assertEQ(a, 192, 0, 0, 1)
+	remove(b, 192, 0, 0, 0, 24)
+	assertEQ(a, 192, 0, 0, 1)
+	remove(a, 192, 0, 0, 0, 24)
+	assertNEQ(a, 192, 0, 0, 1)
+	remove(a, 1, 0, 0, 0, 32)
+	assertNEQ(a, 1, 0, 0, 0)
 }
 
 /* Test ported from kernel implementation:
@@ -211,6 +230,15 @@ func TestTrieIPv6(t *testing.T) {
 		allowedIPs.Insert(netip.PrefixFrom(netip.AddrFrom16(*(*[16]byte)(addr)), int(cidr)), peer)
 	}
 
+	remove := 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.Remove(netip.PrefixFrom(netip.AddrFrom16(*(*[16]byte)(addr)), int(cidr)), peer)
+	}
+
 	assertEQ := func(peer *Peer, a, b, c, d uint32) {
 		var addr []byte
 		addr = append(addr, expand(a)...)
@@ -223,6 +251,18 @@ func TestTrieIPv6(t *testing.T) {
 		}
 	}
 
+	assertNEQ := 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 NEQ failed")
+		}
+	}
+
 	insert(d, 0x26075300, 0x60006b00, 0, 0xc05f0543, 128)
 	insert(c, 0x26075300, 0x60006b00, 0, 0, 64)
 	insert(e, 0, 0, 0, 0, 0)
@@ -244,4 +284,21 @@ func TestTrieIPv6(t *testing.T) {
 	assertEQ(h, 0x24046800, 0x40040800, 0, 0)
 	assertEQ(h, 0x24046800, 0x40040800, 0x10101010, 0x10101010)
 	assertEQ(a, 0x24046800, 0x40040800, 0xdeadbeef, 0xdeadbeef)
+
+	insert(a, 0x24446801, 0x40e40800, 0xdeaebeef, 0xdefbeef, 128)
+	insert(a, 0x24446800, 0xf0e40800, 0xeeaebeef, 0, 98)
+	assertEQ(a, 0x24446801, 0x40e40800, 0xdeaebeef, 0xdefbeef)
+	assertEQ(a, 0x24446800, 0xf0e40800, 0xeeaebeef, 0x10101010)
+	remove(a, 0x24446801, 0x40e40800, 0xdeaebeef, 0xdefbeef, 96)
+	assertEQ(a, 0x24446801, 0x40e40800, 0xdeaebeef, 0xdefbeef)
+	remove(nil, 0x24446801, 0x40e40800, 0xdeaebeef, 0xdefbeef, 128)
+	assertEQ(a, 0x24446801, 0x40e40800, 0xdeaebeef, 0xdefbeef)
+	remove(b, 0x24446801, 0x40e40800, 0xdeaebeef, 0xdefbeef, 128)
+	assertEQ(a, 0x24446801, 0x40e40800, 0xdeaebeef, 0xdefbeef)
+	remove(a, 0x24446801, 0x40e40800, 0xdeaebeef, 0xdefbeef, 128)
+	assertNEQ(a, 0x24446801, 0x40e40800, 0xdeaebeef, 0xdefbeef)
+	remove(b, 0x24446800, 0xf0e40800, 0xeeaebeef, 0, 98)
+	assertEQ(a, 0x24446800, 0xf0e40800, 0xeeaebeef, 0x10101010)
+	remove(a, 0x24446800, 0xf0e40800, 0xeeaebeef, 0, 98)
+	assertNEQ(a, 0x24446800, 0xf0e40800, 0xeeaebeef, 0x10101010)
 }

device/awg/awg.go

@@ -0,0 +1,144 @@
+package awg
+
+import (
+	"bytes"
+	"fmt"
+	"slices"
+	"strconv"
+	"strings"
+	"sync"
+
+	"github.com/tevino/abool"
+)
+
+type aSecCfgType struct {
+	IsSet                      bool
+	JunkPacketCount            int
+	JunkPacketMinSize          int
+	JunkPacketMaxSize          int
+	InitHeaderJunkSize         int
+	ResponseHeaderJunkSize     int
+	CookieReplyHeaderJunkSize  int
+	TransportHeaderJunkSize    int
+	InitPacketMagicHeader      uint32
+	ResponsePacketMagicHeader  uint32
+	UnderloadPacketMagicHeader uint32
+	TransportPacketMagicHeader uint32
+	// InitPacketMagicHeader      Limit
+	// ResponsePacketMagicHeader  Limit
+	// UnderloadPacketMagicHeader Limit
+	// TransportPacketMagicHeader Limit
+}
+
+type Limit struct {
+	Min        uint32
+	Max        uint32
+	HeaderType uint32
+}
+
+func NewLimit(min, max, headerType uint32) (Limit, error) {
+	if min > max {
+		return Limit{}, fmt.Errorf("min (%d) cannot be greater than max (%d)", min, max)
+	}
+
+	return Limit{
+		Min:        min,
+		Max:        max,
+		HeaderType: headerType,
+	}, nil
+}
+
+func ParseMagicHeader(key, value string, defaultHeaderType uint32) (Limit, error) {
+	// tempAwg.ASecCfg.InitPacketMagicHeader, err = awg.NewLimit(uint32(initPacketMagicHeaderMin), uint32(initPacketMagicHeaderMax), DNewLimit(min, max, headerType)efaultMessageInitiationType)
+	// var min, max, headerType uint32
+	// _, err := fmt.Sscanf(value, "%d-%d:%d", &min, &max, &headerType)
+	// if err != nil {
+	// 	return Limit{}, fmt.Errorf("invalid magic header format: %s", value)
+	// }
+
+	limits := strings.Split(value, "-")
+	if len(limits) != 2 {
+		return Limit{}, fmt.Errorf("invalid format for key: %s; %s", key, value)
+	}
+
+	min, err := strconv.ParseUint(limits[0], 10, 32)
+	if err != nil {
+		return Limit{}, fmt.Errorf("parse min key: %s; value: ; %w", key, limits[0], err)
+	}
+
+	max, err := strconv.ParseUint(limits[1], 10, 32)
+	if err != nil {
+		return Limit{}, fmt.Errorf("parse max key: %s; value: ; %w", key, limits[0], err)
+	}
+
+	limit, err := NewLimit(uint32(min), uint32(max), defaultHeaderType)
+	if err != nil {
+		return Limit{}, fmt.Errorf("new lmit key: %s; value: ; %w", key, limits[0], err)
+	}
+
+	return limit, nil
+}
+
+type Limits []Limit
+
+func NewLimits(limits []Limit) Limits {
+	slices.SortFunc(limits, func(a, b Limit) int {
+		if a.Min < b.Min {
+			return -1
+		} else if a.Min > b.Min {
+			return 1
+		}
+		return 0
+	})
+
+	return Limits(limits)
+}
+
+type Protocol struct {
+	IsASecOn abool.AtomicBool
+	// TODO: revision the need of the mutex
+	ASecMux     sync.RWMutex
+	ASecCfg     aSecCfgType
+	JunkCreator junkCreator
+
+	HandshakeHandler SpecialHandshakeHandler
+}
+
+func (protocol *Protocol) CreateInitHeaderJunk() ([]byte, error) {
+	return protocol.createHeaderJunk(protocol.ASecCfg.InitHeaderJunkSize)
+}
+
+func (protocol *Protocol) CreateResponseHeaderJunk() ([]byte, error) {
+	return protocol.createHeaderJunk(protocol.ASecCfg.ResponseHeaderJunkSize)
+}
+
+func (protocol *Protocol) CreateCookieReplyHeaderJunk() ([]byte, error) {
+	return protocol.createHeaderJunk(protocol.ASecCfg.CookieReplyHeaderJunkSize)
+}
+
+func (protocol *Protocol) CreateTransportHeaderJunk(packetSize int) ([]byte, error) {
+	return protocol.createHeaderJunk(protocol.ASecCfg.TransportHeaderJunkSize, packetSize)
+}
+
+func (protocol *Protocol) createHeaderJunk(junkSize int, optExtraSize ...int) ([]byte, error) {
+	extraSize := 0
+	if len(optExtraSize) == 1 {
+		extraSize = optExtraSize[0]
+	}
+
+	var junk []byte
+	protocol.ASecMux.RLock()
+	if junkSize != 0 {
+		buf := make([]byte, 0, junkSize+extraSize)
+		writer := bytes.NewBuffer(buf[:0])
+		err := protocol.JunkCreator.AppendJunk(writer, junkSize)
+		if err != nil {
+			protocol.ASecMux.RUnlock()
+			return nil, err
+		}
+		junk = writer.Bytes()
+	}
+	protocol.ASecMux.RUnlock()
+
+	return junk, nil
+}

device/awg/internal/mock.go

@@ -0,0 +1,37 @@
+package internal
+
+type mockGenerator struct {
+	size int
+}
+
+func NewMockGenerator(size int) mockGenerator {
+	return mockGenerator{size: size}
+}
+
+func (m mockGenerator) Generate() []byte {
+	return make([]byte, m.size)
+}
+
+func (m mockGenerator) Size() int {
+	return m.size
+}
+
+func (m mockGenerator) Name() string {
+	return "mock"
+}
+
+type mockByteGenerator struct {
+	data []byte
+}
+
+func NewMockByteGenerator(data []byte) mockByteGenerator {
+	return mockByteGenerator{data: data}
+}
+
+func (bg mockByteGenerator) Generate() []byte {
+	return bg.data
+}
+
+func (bg mockByteGenerator) Size() int {
+	return len(bg.data)
+}

device/awg/junk_creator.go

@@ -0,0 +1,70 @@
+package awg
+
+import (
+	"bytes"
+	crand "crypto/rand"
+	"fmt"
+	v2 "math/rand/v2"
+)
+
+type junkCreator struct {
+	aSecCfg  aSecCfgType
+	cha8Rand *v2.ChaCha8
+}
+
+// TODO: refactor param to only pass the junk related params
+func NewJunkCreator(aSecCfg aSecCfgType) (junkCreator, error) {
+	buf := make([]byte, 32)
+	_, err := crand.Read(buf)
+	if err != nil {
+		return junkCreator{}, err
+	}
+	return junkCreator{aSecCfg: aSecCfg, cha8Rand: v2.NewChaCha8([32]byte(buf))}, nil
+}
+
+// Should be called with aSecMux RLocked
+func (jc *junkCreator) CreateJunkPackets(junks *[][]byte) error {
+	if jc.aSecCfg.JunkPacketCount == 0 {
+		return nil
+	}
+
+	for range jc.aSecCfg.JunkPacketCount {
+		packetSize := jc.randomPacketSize()
+		junk, err := jc.randomJunkWithSize(packetSize)
+		if err != nil {
+			return fmt.Errorf("create junk packet: %v", err)
+		}
+		*junks = append(*junks, junk)
+	}
+	return nil
+}
+
+// Should be called with aSecMux RLocked
+func (jc *junkCreator) randomPacketSize() int {
+	return int(
+		jc.cha8Rand.Uint64()%uint64(
+			jc.aSecCfg.JunkPacketMaxSize-jc.aSecCfg.JunkPacketMinSize,
+		),
+	) + jc.aSecCfg.JunkPacketMinSize
+}
+
+// Should be called with aSecMux RLocked
+func (jc *junkCreator) AppendJunk(writer *bytes.Buffer, size int) error {
+	headerJunk, err := jc.randomJunkWithSize(size)
+	if err != nil {
+		return fmt.Errorf("create header junk: %v", err)
+	}
+	_, err = writer.Write(headerJunk)
+	if err != nil {
+		return fmt.Errorf("write header junk: %v", err)
+	}
+	return nil
+}
+
+// Should be called with aSecMux RLocked
+func (jc *junkCreator) randomJunkWithSize(size int) ([]byte, error) {
+	// TODO: use a memory pool to allocate
+	junk := make([]byte, size)
+	_, err := jc.cha8Rand.Read(junk)
+	return junk, err
+}

device/awg/junk_creator_test.go

@@ -0,0 +1,115 @@
+package awg
+
+import (
+	"bytes"
+	"fmt"
+	"testing"
+)
+
+func setUpJunkCreator(t *testing.T) (junkCreator, error) {
+	jc, err := NewJunkCreator(aSecCfgType{
+		IsSet:                      true,
+		JunkPacketCount:            5,
+		JunkPacketMinSize:          500,
+		JunkPacketMaxSize:          1000,
+		InitHeaderJunkSize:         30,
+		ResponseHeaderJunkSize:     40,
+		InitPacketMagicHeader:      123456,
+		ResponsePacketMagicHeader:  67543,
+		UnderloadPacketMagicHeader: 32345,
+		TransportPacketMagicHeader: 123123,
+	})
+
+	if err != nil {
+		t.Errorf("failed to create junk creator %v", err)
+		return junkCreator{}, err
+	}
+
+	return jc, nil
+}
+
+func Test_junkCreator_createJunkPackets(t *testing.T) {
+	jc, err := setUpJunkCreator(t)
+	if err != nil {
+		return
+	}
+	t.Run("valid", func(t *testing.T) {
+		got := make([][]byte, 0, jc.aSecCfg.JunkPacketCount)
+		err := jc.CreateJunkPackets(&got)
+		if err != nil {
+			t.Errorf(
+				"junkCreator.createJunkPackets() = %v; failed",
+				err,
+			)
+			return
+		}
+		seen := make(map[string]bool)
+		for _, junk := range got {
+			key := string(junk)
+			if seen[key] {
+				t.Errorf(
+					"junkCreator.createJunkPackets() = %v, duplicate key: %v",
+					got,
+					junk,
+				)
+				return
+			}
+			seen[key] = true
+		}
+	})
+}
+
+func Test_junkCreator_randomJunkWithSize(t *testing.T) {
+	t.Run("valid", func(t *testing.T) {
+		jc, err := setUpJunkCreator(t)
+		if err != nil {
+			return
+		}
+		r1, _ := jc.randomJunkWithSize(10)
+		r2, _ := jc.randomJunkWithSize(10)
+		fmt.Printf("%v\n%v\n", r1, r2)
+		if bytes.Equal(r1, r2) {
+			t.Errorf("same junks %v", err)
+			return
+		}
+	})
+}
+
+func Test_junkCreator_randomPacketSize(t *testing.T) {
+	jc, err := setUpJunkCreator(t)
+	if err != nil {
+		return
+	}
+	for range [30]struct{}{} {
+		t.Run("valid", func(t *testing.T) {
+			if got := jc.randomPacketSize(); jc.aSecCfg.JunkPacketMinSize > got ||
+				got > jc.aSecCfg.JunkPacketMaxSize {
+				t.Errorf(
+					"junkCreator.randomPacketSize() = %v, not between range [%v,%v]",
+					got,
+					jc.aSecCfg.JunkPacketMinSize,
+					jc.aSecCfg.JunkPacketMaxSize,
+				)
+			}
+		})
+	}
+}
+
+func Test_junkCreator_appendJunk(t *testing.T) {
+	jc, err := setUpJunkCreator(t)
+	if err != nil {
+		return
+	}
+	t.Run("valid", func(t *testing.T) {
+		s := "apple"
+		buffer := bytes.NewBuffer([]byte(s))
+		err := jc.AppendJunk(buffer, 30)
+		if err != nil &&
+			buffer.Len() != len(s)+30 {
+			t.Error("appendWithJunk() size don't match")
+		}
+		read := make([]byte, 50)
+		buffer.Read(read)
+		fmt.Println(string(read))
+	})
+}

device/awg/special_handshake_handler.go

@@ -0,0 +1,73 @@
+package awg
+
+import (
+	"errors"
+	"time"
+
+	"github.com/tevino/abool"
+	"go.uber.org/atomic"
+)
+
+// TODO: atomic?/ and better way to use this
+var PacketCounter *atomic.Uint64 = atomic.NewUint64(0)
+
+// TODO
+var WaitResponse = struct {
+	Channel    chan struct{}
+	ShouldWait *abool.AtomicBool
+}{
+	make(chan struct{}, 1),
+	abool.New(),
+}
+
+type SpecialHandshakeHandler struct {
+	isFirstDone    bool
+	SpecialJunk    TagJunkPacketGenerators
+	ControlledJunk TagJunkPacketGenerators
+
+	nextItime time.Time
+	ITimeout  time.Duration // seconds
+
+	IsSet bool
+}
+
+func (handler *SpecialHandshakeHandler) Validate(maxSegmentSize int) error {
+	var errs []error
+	if err := handler.SpecialJunk.Validate(maxSegmentSize); err != nil {
+		errs = append(errs, err)
+	}
+	if err := handler.ControlledJunk.Validate(maxSegmentSize); err != nil {
+		errs = append(errs, err)
+	}
+	return errors.Join(errs...)
+}
+
+func (handler *SpecialHandshakeHandler) GenerateSpecialJunk() [][]byte {
+	if !handler.SpecialJunk.IsDefined() {
+		return nil
+	}
+
+	// TODO: create tests
+	if !handler.isFirstDone {
+		handler.isFirstDone = true
+	} else if !handler.isTimeToSendSpecial() {
+		return nil
+	}
+
+	rv := handler.SpecialJunk.GeneratePackets()
+	handler.nextItime = time.Now().Add(handler.ITimeout)
+
+	return rv
+}
+
+func (handler *SpecialHandshakeHandler) isTimeToSendSpecial() bool {
+	return time.Now().After(handler.nextItime)
+}
+
+func (handler *SpecialHandshakeHandler) GenerateControlledJunk() [][]byte {
+	if !handler.ControlledJunk.IsDefined() {
+		return nil
+	}
+
+	return handler.ControlledJunk.GeneratePackets()
+}

device/awg/tag_generator.go

@@ -0,0 +1,190 @@
+package awg
+
+import (
+	crand "crypto/rand"
+	"encoding/binary"
+	"encoding/hex"
+	"fmt"
+	"strconv"
+	"strings"
+	"time"
+
+	v2 "math/rand/v2"
+	// "go.uber.org/atomic"
+)
+
+type Generator interface {
+	Generate() []byte
+	Size() int
+}
+
+type newGenerator func(string) (Generator, error)
+
+type BytesGenerator struct {
+	value []byte
+	size  int
+}
+
+func (bg *BytesGenerator) Generate() []byte {
+	return bg.value
+}
+
+func (bg *BytesGenerator) Size() int {
+	return bg.size
+}
+
+func newBytesGenerator(param string) (Generator, error) {
+	hasPrefix := strings.HasPrefix(param, "0x") || strings.HasPrefix(param, "0X")
+	if !hasPrefix {
+		return nil, fmt.Errorf("not correct hex: %s", param)
+	}
+
+	hex, err := hexToBytes(param)
+	if err != nil {
+		return nil, fmt.Errorf("hexToBytes: %w", err)
+	}
+
+	return &BytesGenerator{value: hex, size: len(hex)}, nil
+}
+
+func hexToBytes(hexStr string) ([]byte, error) {
+	hexStr = strings.TrimPrefix(hexStr, "0x")
+	hexStr = strings.TrimPrefix(hexStr, "0X")
+
+	// Ensure even length (pad with leading zero if needed)
+	if len(hexStr)%2 != 0 {
+		hexStr = "0" + hexStr
+	}
+
+	return hex.DecodeString(hexStr)
+}
+
+type RandomPacketGenerator struct {
+	cha8Rand *v2.ChaCha8
+	size     int
+}
+
+func (rpg *RandomPacketGenerator) Generate() []byte {
+	junk := make([]byte, rpg.size)
+	rpg.cha8Rand.Read(junk)
+	return junk
+}
+
+func (rpg *RandomPacketGenerator) Size() int {
+	return rpg.size
+}
+
+func newRandomPacketGenerator(param string) (Generator, error) {
+	size, err := strconv.Atoi(param)
+	if err != nil {
+		return nil, fmt.Errorf("random packet parse int: %w", err)
+	}
+
+	if size > 1000 {
+		return nil, fmt.Errorf("random packet size must be less than 1000")
+	}
+
+	buf := make([]byte, 32)
+	_, err = crand.Read(buf)
+	if err != nil {
+		return nil, fmt.Errorf("random packet crand read: %w", err)
+	}
+
+	return &RandomPacketGenerator{
+		cha8Rand: v2.NewChaCha8([32]byte(buf)),
+		size:     size,
+	}, nil
+}
+
+type TimestampGenerator struct {
+}
+
+func (tg *TimestampGenerator) Generate() []byte {
+	buf := make([]byte, 8)
+	binary.BigEndian.PutUint64(buf, uint64(time.Now().Unix()))
+	return buf
+}
+
+func (tg *TimestampGenerator) Size() int {
+	return 8
+}
+
+func newTimestampGenerator(param string) (Generator, error) {
+	if len(param) != 0 {
+		return nil, fmt.Errorf("timestamp param needs to be empty: %s", param)
+	}
+
+	return &TimestampGenerator{}, nil
+}
+
+type WaitTimeoutGenerator struct {
+	waitTimeout time.Duration
+}
+
+func (wtg *WaitTimeoutGenerator) Generate() []byte {
+	time.Sleep(wtg.waitTimeout)
+	return []byte{}
+}
+
+func (wtg *WaitTimeoutGenerator) Size() int {
+	return 0
+}
+
+func newWaitTimeoutGenerator(param string) (Generator, error) {
+	timeout, err := strconv.Atoi(param)
+	if err != nil {
+		return nil, fmt.Errorf("timeout parse int: %w", err)
+	}
+
+	if timeout > 5000 {
+		return nil, fmt.Errorf("timeout must be less than 5000ms")
+	}
+
+	return &WaitTimeoutGenerator{
+		waitTimeout: time.Duration(timeout) * time.Millisecond,
+	}, nil
+}
+
+type PacketCounterGenerator struct {
+}
+
+func (c *PacketCounterGenerator) Generate() []byte {
+	buf := make([]byte, 8)
+	// TODO: better way to handle counter tag
+	binary.BigEndian.PutUint64(buf, PacketCounter.Load())
+	return buf
+}
+
+func (c *PacketCounterGenerator) Size() int {
+	return 8
+}
+
+func newPacketCounterGenerator(param string) (Generator, error) {
+	if len(param) != 0 {
+		return nil, fmt.Errorf("packet counter param needs to be empty: %s", param)
+	}
+
+	return &PacketCounterGenerator{}, nil
+}
+
+type WaitResponseGenerator struct {
+}
+
+func (c *WaitResponseGenerator) Generate() []byte {
+	WaitResponse.ShouldWait.Set()
+	<-WaitResponse.Channel
+	WaitResponse.ShouldWait.UnSet()
+	return []byte{}
+}
+
+func (c *WaitResponseGenerator) Size() int {
+	return 0
+}
+
+func newWaitResponseGenerator(param string) (Generator, error) {
+	if len(param) != 0 {
+		return nil, fmt.Errorf("wait response param needs to be empty: %s", param)
+	}
+
+	return &WaitResponseGenerator{}, nil
+}

device/awg/tag_generator_test.go

@@ -0,0 +1,189 @@
+package awg
+
+import (
+	"encoding/binary"
+	"fmt"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func Test_newBytesGenerator(t *testing.T) {
+	type args struct {
+		param string
+	}
+	tests := []struct {
+		name    string
+		args    args
+		want    []byte
+		wantErr error
+	}{
+		{
+			name: "empty",
+			args: args{
+				param: "",
+			},
+			wantErr: fmt.Errorf("not correct hex"),
+		},
+		{
+			name: "wrong start",
+			args: args{
+				param: "123456",
+			},
+			wantErr: fmt.Errorf("not correct hex"),
+		},
+		{
+			name: "not only hex value with X",
+			args: args{
+				param: "0X12345q",
+			},
+			wantErr: fmt.Errorf("not correct hex"),
+		},
+		{
+			name: "not only hex value with x",
+			args: args{
+				param: "0x12345q",
+			},
+			wantErr: fmt.Errorf("not correct hex"),
+		},
+		{
+			name: "valid hex",
+			args: args{
+				param: "0xf6ab3267fa",
+			},
+			want: []byte{0xf6, 0xab, 0x32, 0x67, 0xfa},
+		},
+		{
+			name: "valid hex with odd length",
+			args: args{
+				param: "0xfab3267fa",
+			},
+			want: []byte{0xf, 0xab, 0x32, 0x67, 0xfa},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got, err := newBytesGenerator(tt.args.param)
+
+			if tt.wantErr != nil {
+				require.ErrorAs(t, err, &tt.wantErr)
+				require.Nil(t, got)
+				return
+			}
+
+			require.Nil(t, err)
+			require.NotNil(t, got)
+
+			gotValues := got.Generate()
+			require.Equal(t, tt.want, gotValues)
+		})
+	}
+}
+
+func Test_newRandomPacketGenerator(t *testing.T) {
+	type args struct {
+		param string
+	}
+	tests := []struct {
+		name    string
+		args    args
+		wantErr error
+	}{
+		{
+			name: "empty",
+			args: args{
+				param: "",
+			},
+			wantErr: fmt.Errorf("parse int"),
+		},
+		{
+			name: "not an int",
+			args: args{
+				param: "x",
+			},
+			wantErr: fmt.Errorf("parse int"),
+		},
+		{
+			name: "too large",
+			args: args{
+				param: "1001",
+			},
+			wantErr: fmt.Errorf("random packet size must be less than 1000"),
+		},
+		{
+			name: "valid",
+			args: args{
+				param: "12",
+			},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got, err := newRandomPacketGenerator(tt.args.param)
+			if tt.wantErr != nil {
+				require.ErrorAs(t, err, &tt.wantErr)
+				require.Nil(t, got)
+				return
+			}
+
+			require.Nil(t, err)
+			require.NotNil(t, got)
+			first := got.Generate()
+
+			second := got.Generate()
+			require.NotEqual(t, first, second)
+		})
+	}
+}
+
+func TestPacketCounterGenerator(t *testing.T) {
+	tests := []struct {
+		name    string
+		param   string
+		wantErr bool
+	}{
+		{
+			name:    "Valid empty param",
+			param:   "",
+			wantErr: false,
+		},
+		{
+			name:    "Invalid non-empty param",
+			param:   "anything",
+			wantErr: true,
+		},
+	}
+
+	for _, tc := range tests {
+		tc := tc // capture range variable
+		t.Run(tc.name, func(t *testing.T) {
+			t.Parallel()
+
+			gen, err := newPacketCounterGenerator(tc.param)
+			if tc.wantErr {
+				require.Error(t, err)
+				return
+			}
+
+			require.NoError(t, err)
+			require.Equal(t, 8, gen.Size())
+
+			// Reset counter to known value for test
+			initialCount := uint64(42)
+			PacketCounter.Store(initialCount)
+
+			output := gen.Generate()
+			require.Equal(t, 8, len(output))
+
+			// Verify counter value in output
+			counterValue := binary.BigEndian.Uint64(output)
+			require.Equal(t, initialCount, counterValue)
+
+			// Increment counter and verify change
+			PacketCounter.Add(1)
+			output = gen.Generate()
+			counterValue = binary.BigEndian.Uint64(output)
+			require.Equal(t, initialCount+1, counterValue)
+		})
+	}
+}

device/awg/tag_junk_packet_generator.go

@@ -0,0 +1,63 @@
+package awg
+
+import (
+	"fmt"
+	"strconv"
+)
+
+type TagJunkPacketGenerator struct {
+	name     string
+	tagValue string
+
+	packetSize int
+	generators []Generator
+}
+
+func newTagJunkPacketGenerator(name, tagValue string, size int) TagJunkPacketGenerator {
+	return TagJunkPacketGenerator{
+		name:       name,
+		tagValue:   tagValue,
+		generators: make([]Generator, 0, size),
+	}
+}
+
+func (tg *TagJunkPacketGenerator) append(generator Generator) {
+	tg.generators = append(tg.generators, generator)
+	tg.packetSize += generator.Size()
+}
+
+func (tg *TagJunkPacketGenerator) generatePacket() []byte {
+	packet := make([]byte, 0, tg.packetSize)
+	for _, generator := range tg.generators {
+		packet = append(packet, generator.Generate()...)
+	}
+
+	return packet
+}
+
+func (tg *TagJunkPacketGenerator) Name() string {
+	return tg.name
+}
+
+func (tg *TagJunkPacketGenerator) nameIndex() (int, error) {
+	if len(tg.name) != 2 {
+		return 0, fmt.Errorf("name must be 2 character long: %s", tg.name)
+	}
+
+	index, err := strconv.Atoi(tg.name[1:2])
+	if err != nil {
+		return 0, fmt.Errorf("name 2 char should be an int %w", err)
+	}
+	return index, nil
+}
+
+func (tg *TagJunkPacketGenerator) IpcGetFields() IpcFields {
+	return IpcFields{
+		Key:   tg.name,
+		Value: tg.tagValue,
+	}
+}
+
+func (tg *TagJunkPacketGenerator) Size() int {
+	return tg.packetSize
+}

device/awg/tag_junk_packet_generator_test.go

@@ -0,0 +1,210 @@
+package awg
+
+import (
+	"testing"
+
+	"github.com/amnezia-vpn/amneziawg-go/device/awg/internal"
+	"github.com/stretchr/testify/require"
+)
+
+func TestNewTagJunkGenerator(t *testing.T) {
+	t.Parallel()
+
+	testCases := []struct {
+		name     string
+		genName  string
+		size     int
+		expected TagJunkPacketGenerator
+	}{
+		{
+			name:    "Create new generator with empty name",
+			genName: "",
+			size:    0,
+			expected: TagJunkPacketGenerator{
+				name:       "",
+				packetSize: 0,
+				generators: make([]Generator, 0),
+			},
+		},
+		{
+			name:    "Create new generator with valid name",
+			genName: "T1",
+			size:    0,
+			expected: TagJunkPacketGenerator{
+				name:       "T1",
+				packetSize: 0,
+				generators: make([]Generator, 0),
+			},
+		},
+		{
+			name:    "Create new generator with non-zero size",
+			genName: "T2",
+			size:    5,
+			expected: TagJunkPacketGenerator{
+				name:       "T2",
+				packetSize: 0,
+				generators: make([]Generator, 5),
+			},
+		},
+	}
+
+	for _, tc := range testCases {
+		tc := tc // capture range variable
+		t.Run(tc.name, func(t *testing.T) {
+			t.Parallel()
+			result := newTagJunkPacketGenerator(tc.genName, "", tc.size)
+			require.Equal(t, tc.expected.name, result.name)
+			require.Equal(t, tc.expected.packetSize, result.packetSize)
+			require.Equal(t, cap(result.generators), len(tc.expected.generators))
+		})
+	}
+}
+
+func TestTagJunkGeneratorAppend(t *testing.T) {
+	t.Parallel()
+
+	testCases := []struct {
+		name           string
+		initialState   TagJunkPacketGenerator
+		mockSize       int
+		expectedLength int
+		expectedSize   int
+	}{
+		{
+			name:           "Append to empty generator",
+			initialState:   newTagJunkPacketGenerator("T1", "", 0),
+			mockSize:       5,
+			expectedLength: 1,
+			expectedSize:   5,
+		},
+		{
+			name: "Append to non-empty generator",
+			initialState: TagJunkPacketGenerator{
+				name:       "T2",
+				packetSize: 10,
+				generators: make([]Generator, 2),
+			},
+			mockSize:       7,
+			expectedLength: 3,  // 2 existing + 1 new
+			expectedSize:   17, // 10 + 7
+		},
+	}
+
+	for _, tc := range testCases {
+		tc := tc // capture range variable
+		t.Run(tc.name, func(t *testing.T) {
+			t.Parallel()
+
+			tg := tc.initialState
+			mockGen := internal.NewMockGenerator(tc.mockSize)
+
+			tg.append(mockGen)
+
+			require.Equal(t, tc.expectedLength, len(tg.generators))
+			require.Equal(t, tc.expectedSize, tg.packetSize)
+		})
+	}
+}
+
+func TestTagJunkGeneratorGenerate(t *testing.T) {
+	t.Parallel()
+
+	// Create mock generators for testing
+	mockGen1 := internal.NewMockByteGenerator([]byte{0x01, 0x02})
+	mockGen2 := internal.NewMockByteGenerator([]byte{0x03, 0x04, 0x05})
+
+	testCases := []struct {
+		name           string
+		setupGenerator func() TagJunkPacketGenerator
+		expected       []byte
+	}{
+		{
+			name: "Generate with empty generators",
+			setupGenerator: func() TagJunkPacketGenerator {
+				return newTagJunkPacketGenerator("T1", "", 0)
+			},
+			expected: []byte{},
+		},
+		{
+			name: "Generate with single generator",
+			setupGenerator: func() TagJunkPacketGenerator {
+				tg := newTagJunkPacketGenerator("T2", "", 0)
+				tg.append(mockGen1)
+				return tg
+			},
+			expected: []byte{0x01, 0x02},
+		},
+		{
+			name: "Generate with multiple generators",
+			setupGenerator: func() TagJunkPacketGenerator {
+				tg := newTagJunkPacketGenerator("T3", "", 0)
+				tg.append(mockGen1)
+				tg.append(mockGen2)
+				return tg
+			},
+			expected: []byte{0x01, 0x02, 0x03, 0x04, 0x05},
+		},
+	}
+
+	for _, tc := range testCases {
+		tc := tc // capture range variable
+		t.Run(tc.name, func(t *testing.T) {
+			t.Parallel()
+
+			tg := tc.setupGenerator()
+			result := tg.generatePacket()
+
+			require.Equal(t, tc.expected, result)
+		})
+	}
+}
+
+func TestTagJunkGeneratorNameIndex(t *testing.T) {
+	t.Parallel()
+
+	testCases := []struct {
+		name          string
+		generatorName string
+		expectedIndex int
+		expectError   bool
+	}{
+		{
+			name:          "Valid name with digit",
+			generatorName: "T5",
+			expectedIndex: 5,
+			expectError:   false,
+		},
+		{
+			name:          "Invalid name - too short",
+			generatorName: "T",
+			expectError:   true,
+		},
+		{
+			name:          "Invalid name - too long",
+			generatorName: "T55",
+			expectError:   true,
+		},
+		{
+			name:          "Invalid name - non-digit second character",
+			generatorName: "TX",
+			expectError:   true,
+		},
+	}
+
+	for _, tc := range testCases {
+		tc := tc // capture range variable
+		t.Run(tc.name, func(t *testing.T) {
+			t.Parallel()
+
+			tg := TagJunkPacketGenerator{name: tc.generatorName}
+			index, err := tg.nameIndex()
+
+			if tc.expectError {
+				require.Error(t, err)
+			} else {
+				require.NoError(t, err)
+				require.Equal(t, tc.expectedIndex, index)
+			}
+		})
+	}
+}

device/awg/tag_junk_packet_generators.go

@@ -0,0 +1,72 @@
+package awg
+
+import (
+	"fmt"
+)
+
+type TagJunkPacketGenerators struct {
+	tagGenerators    []TagJunkPacketGenerator
+	length           int
+	DefaultJunkCount int // Jc
+}
+
+func (generators *TagJunkPacketGenerators) AppendGenerator(
+	generator TagJunkPacketGenerator,
+) {
+	generators.tagGenerators = append(generators.tagGenerators, generator)
+	generators.length++
+}
+
+func (generators *TagJunkPacketGenerators) IsDefined() bool {
+	return len(generators.tagGenerators) > 0
+}
+
+// validate that packets were defined consecutively
+func (generators *TagJunkPacketGenerators) Validate(maxSegmentSize int) error {
+	seen := make([]bool, len(generators.tagGenerators))
+	for _, generator := range generators.tagGenerators {
+		index, err := generator.nameIndex()
+		if index > len(generators.tagGenerators) {
+			return fmt.Errorf("junk packet index should be consecutive")
+		}
+		if err != nil {
+			return fmt.Errorf("name index: %w", err)
+		} else {
+			seen[index-1] = true
+		}
+
+		if generator.Size() > maxSegmentSize {
+			return fmt.Errorf("junk packet %s must not exceed %d bytes", generator.name, maxSegmentSize)
+		}
+	}
+
+	for _, found := range seen {
+		if !found {
+			return fmt.Errorf("junk packet index should be consecutive")
+		}
+	}
+
+	return nil
+}
+
+func (generators *TagJunkPacketGenerators) GeneratePackets() [][]byte {
+	var rv = make([][]byte, 0, generators.length+generators.DefaultJunkCount)
+
+	for i, tagGenerator := range generators.tagGenerators {
+		rv = append(rv, make([]byte, tagGenerator.packetSize))
+		copy(rv[i], tagGenerator.generatePacket())
+		PacketCounter.Inc()
+	}
+	PacketCounter.Add(uint64(generators.DefaultJunkCount))
+
+	return rv
+}
+
+func (tg *TagJunkPacketGenerators) IpcGetFields() []IpcFields {
+	rv := make([]IpcFields, 0, len(tg.tagGenerators))
+	for _, generator := range tg.tagGenerators {
+		rv = append(rv, generator.IpcGetFields())
+	}
+
+	return rv
+}

device/awg/tag_junk_packet_generators_test.go

@@ -0,0 +1,149 @@
+package awg
+
+import (
+	"testing"
+
+	"github.com/amnezia-vpn/amneziawg-go/device/awg/internal"
+	"github.com/stretchr/testify/require"
+)
+
+func TestTagJunkGeneratorHandlerAppendGenerator(t *testing.T) {
+	tests := []struct {
+		name      string
+		generator TagJunkPacketGenerator
+	}{
+		{
+			name:      "append single generator",
+			generator: newTagJunkPacketGenerator("t1", "", 10),
+		},
+	}
+
+	for _, tt := range tests {
+		tt := tt
+		t.Run(tt.name, func(t *testing.T) {
+			t.Parallel()
+			generators := &TagJunkPacketGenerators{}
+
+			// Initial length should be 0
+			require.Equal(t, 0, generators.length)
+			require.Empty(t, generators.tagGenerators)
+
+			// After append, length should be 1 and generator should be added
+			generators.AppendGenerator(tt.generator)
+			require.Equal(t, 1, generators.length)
+			require.Len(t, generators.tagGenerators, 1)
+			require.Equal(t, tt.generator, generators.tagGenerators[0])
+		})
+	}
+}
+
+func TestTagJunkGeneratorHandlerValidate(t *testing.T) {
+	tests := []struct {
+		name       string
+		generators []TagJunkPacketGenerator
+		wantErr    bool
+		errMsg     string
+	}{
+		{
+			name: "bad start",
+			generators: []TagJunkPacketGenerator{
+				newTagJunkPacketGenerator("t3", "", 10),
+				newTagJunkPacketGenerator("t4", "", 10),
+			},
+			wantErr: true,
+			errMsg:  "junk packet index should be consecutive",
+		},
+		{
+			name: "non-consecutive indices",
+			generators: []TagJunkPacketGenerator{
+				newTagJunkPacketGenerator("t1", "", 10),
+				newTagJunkPacketGenerator("t3", "", 10), // Missing t2
+			},
+			wantErr: true,
+			errMsg:  "junk packet index should be consecutive",
+		},
+		{
+			name: "consecutive indices",
+			generators: []TagJunkPacketGenerator{
+				newTagJunkPacketGenerator("t1", "", 10),
+				newTagJunkPacketGenerator("t2", "", 10),
+				newTagJunkPacketGenerator("t3", "", 10),
+				newTagJunkPacketGenerator("t4", "", 10),
+				newTagJunkPacketGenerator("t5", "", 10),
+			},
+		},
+		{
+			name: "nameIndex error",
+			generators: []TagJunkPacketGenerator{
+				newTagJunkPacketGenerator("error", "", 10),
+			},
+			wantErr: true,
+			errMsg:  "name must be 2 character long",
+		},
+	}
+
+	for _, tt := range tests {
+		tt := tt
+		t.Run(tt.name, func(t *testing.T) {
+			t.Parallel()
+			generators := &TagJunkPacketGenerators{}
+			for _, gen := range tt.generators {
+				generators.AppendGenerator(gen)
+			}
+
+			err := generators.Validate(1500)
+			if tt.wantErr {
+				require.Error(t, err)
+				require.Contains(t, err.Error(), tt.errMsg)
+				return
+			}
+			require.NoError(t, err)
+		})
+	}
+}
+
+func TestTagJunkGeneratorHandlerGenerate(t *testing.T) {
+	mockByte1 := []byte{0x01, 0x02}
+	mockByte2 := []byte{0x03, 0x04, 0x05}
+	mockGen1 := internal.NewMockByteGenerator(mockByte1)
+	mockGen2 := internal.NewMockByteGenerator(mockByte2)
+
+	tests := []struct {
+		name           string
+		setupGenerator func() []TagJunkPacketGenerator
+		expected       [][]byte
+	}{
+		{
+			name: "generate with no default junk",
+			setupGenerator: func() []TagJunkPacketGenerator {
+				tg1 := newTagJunkPacketGenerator("t1", "", 0)
+				tg1.append(mockGen1)
+				tg1.append(mockGen2)
+				tg2 := newTagJunkPacketGenerator("t2", "", 0)
+				tg2.append(mockGen2)
+				tg2.append(mockGen1)
+
+				return []TagJunkPacketGenerator{tg1, tg2}
+			},
+			expected: [][]byte{
+				append(mockByte1, mockByte2...),
+				append(mockByte2, mockByte1...),
+			},
+		},
+	}
+
+	for _, tt := range tests {
+		tt := tt
+		t.Run(tt.name, func(t *testing.T) {
+			t.Parallel()
+			generators := &TagJunkPacketGenerators{}
+			tagGenerators := tt.setupGenerator()
+			for _, gen := range tagGenerators {
+				generators.AppendGenerator(gen)
+			}
+
+			result := generators.GeneratePackets()
+			require.Equal(t, result, tt.expected)
+		})
+	}
+}

device/awg/tag_parser.go

@@ -0,0 +1,112 @@
+package awg
+
+import (
+	"fmt"
+	"maps"
+	"regexp"
+	"strings"
+)
+
+type IpcFields struct{ Key, Value string }
+
+type EnumTag string
+
+const (
+	BytesEnumTag        EnumTag = "b"
+	CounterEnumTag      EnumTag = "c"
+	TimestampEnumTag    EnumTag = "t"
+	RandomBytesEnumTag  EnumTag = "r"
+	WaitTimeoutEnumTag  EnumTag = "wt"
+	WaitResponseEnumTag EnumTag = "wr"
+)
+
+var generatorCreator = map[EnumTag]newGenerator{
+	BytesEnumTag:       newBytesGenerator,
+	CounterEnumTag:     newPacketCounterGenerator,
+	TimestampEnumTag:   newTimestampGenerator,
+	RandomBytesEnumTag: newRandomPacketGenerator,
+	WaitTimeoutEnumTag: newWaitTimeoutGenerator,
+	// WaitResponseEnumTag: newWaitResponseGenerator,
+}
+
+// helper map to determine enumTags are unique
+var uniqueTags = map[EnumTag]bool{
+	CounterEnumTag:   false,
+	TimestampEnumTag: false,
+}
+
+type Tag struct {
+	Name  EnumTag
+	Param string
+}
+
+func parseTag(input string) (Tag, error) {
+	// Regular expression to match <tagname optional_param>
+	re := regexp.MustCompile(`([a-zA-Z]+)(?:\s+([^>]+))?>`)
+
+	match := re.FindStringSubmatch(input)
+	tag := Tag{
+		Name: EnumTag(match[1]),
+	}
+	if len(match) > 2 && match[2] != "" {
+		tag.Param = strings.TrimSpace(match[2])
+	}
+
+	return tag, nil
+}
+
+func Parse(name, input string) (TagJunkPacketGenerator, error) {
+	inputSlice := strings.Split(input, "<")
+	if len(inputSlice) <= 1 {
+		return TagJunkPacketGenerator{}, fmt.Errorf("empty input: %s", input)
+	}
+
+	uniqueTagCheck := make(map[EnumTag]bool, len(uniqueTags))
+	maps.Copy(uniqueTagCheck, uniqueTags)
+
+	// skip byproduct of split
+	inputSlice = inputSlice[1:]
+	rv := newTagJunkPacketGenerator(name, input, len(inputSlice))
+	for _, inputParam := range inputSlice {
+		if len(inputParam) <= 1 {
+			return TagJunkPacketGenerator{}, fmt.Errorf(
+				"empty tag in input: %s",
+				inputSlice,
+			)
+		} else if strings.Count(inputParam, ">") != 1 {
+			return TagJunkPacketGenerator{}, fmt.Errorf("ill formated input: %s", input)
+		}
+
+		tag, _ := parseTag(inputParam)
+		creator, ok := generatorCreator[tag.Name]
+		if !ok {
+			return TagJunkPacketGenerator{}, fmt.Errorf("invalid tag: %s", tag.Name)
+		}
+		if present, ok := uniqueTagCheck[tag.Name]; ok {
+			if present {
+				return TagJunkPacketGenerator{}, fmt.Errorf(
+					"tag %s needs to be unique",
+					tag.Name,
+				)
+			}
+			uniqueTagCheck[tag.Name] = true
+		}
+		generator, err := creator(tag.Param)
+		if err != nil {
+			return TagJunkPacketGenerator{}, fmt.Errorf("gen: %w", err)
+		}
+
+		// TODO: handle counter tag
+		// if tag.Name == CounterEnumTag {
+		// 	packetCounter, ok := generator.(*PacketCounterGenerator)
+		// 	if !ok {
+		// 		log.Fatalf("packet counter generator expected, got %T", generator)
+		// 	}
+		// 	PacketCounter = packetCounter.counter
+		// }
+
+		rv.append(generator)
+	}
+
+	return rv, nil
+}

device/awg/tag_parser_test.go

@@ -0,0 +1,77 @@
+package awg
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestParse(t *testing.T) {
+	type args struct {
+		name  string
+		input string
+	}
+	tests := []struct {
+		name    string
+		args    args
+		wantErr error
+	}{
+		{
+			name:    "invalid name",
+			args:    args{name: "apple", input: ""},
+			wantErr: fmt.Errorf("ill formated input"),
+		},
+		{
+			name:    "empty",
+			args:    args{name: "i1", input: ""},
+			wantErr: fmt.Errorf("ill formated input"),
+		},
+		{
+			name:    "extra >",
+			args:    args{name: "i1", input: "<b 0xf6ab3267fa><c>>"},
+			wantErr: fmt.Errorf("ill formated input"),
+		},
+		{
+			name:    "extra <",
+			args:    args{name: "i1", input: "<<b 0xf6ab3267fa><c>"},
+			wantErr: fmt.Errorf("empty tag in input"),
+		},
+		{
+			name:    "empty <>",
+			args:    args{name: "i1", input: "<><b 0xf6ab3267fa><c>"},
+			wantErr: fmt.Errorf("empty tag in input"),
+		},
+		{
+			name:    "invalid tag",
+			args:    args{name: "i1", input: "<q 0xf6ab3267fa>"},
+			wantErr: fmt.Errorf("invalid tag"),
+		},
+		{
+			name:    "counter uniqueness violation",
+			args:    args{name: "i1", input: "<c><c>"},
+			wantErr: fmt.Errorf("parse tag needs to be unique"),
+		},
+		{
+			name:    "timestamp uniqueness violation",
+			args:    args{name: "i1", input: "<t><t>"},
+			wantErr: fmt.Errorf("parse tag needs to be unique"),
+		},
+		{
+			name: "valid",
+			args: args{input: "<b 0xf6ab3267fa><c><b 0xf6ab><t><r 10><wt 10>"},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			_, err := Parse(tt.args.name, tt.args.input)
+
+			// TODO:  ErrorAs doesn't work as you think
+			if tt.wantErr != nil {
+				require.ErrorAs(t, err, &tt.wantErr)
+				return
+			}
+			require.Nil(t, err)
+		})
+	}
+}

device/bind_test.go

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package device
@@ -8,7 +8,7 @@ package device
 import (
 	"errors"
 
-	"golang.zx2c4.com/wireguard/conn"
+	"github.com/amnezia-vpn/amneziawg-go/conn"
 )
 
 type DummyDatagram struct {

device/channels.go

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package device

device/constants.go

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package device

device/cookie.go

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package device

device/cookie_test.go

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package device

device/device.go

@@ -1,22 +1,60 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package device
 
 import (
+	"errors"
 	"runtime"
 	"sync"
 	"sync/atomic"
 	"time"
 
-	"golang.zx2c4.com/wireguard/conn"
-	"golang.zx2c4.com/wireguard/ratelimiter"
-	"golang.zx2c4.com/wireguard/rwcancel"
-	"golang.zx2c4.com/wireguard/tun"
+	"github.com/amnezia-vpn/amneziawg-go/conn"
+	"github.com/amnezia-vpn/amneziawg-go/device/awg"
+	"github.com/amnezia-vpn/amneziawg-go/ipc"
+	"github.com/amnezia-vpn/amneziawg-go/ratelimiter"
+	"github.com/amnezia-vpn/amneziawg-go/rwcancel"
+	"github.com/amnezia-vpn/amneziawg-go/tun"
 )
 
+type Version uint8
+
+const (
+	VersionDefault Version = iota
+	VersionAwg
+	VersionAwgSpecialHandshake
+)
+
+// TODO:
+type AtomicVersion struct {
+	value atomic.Uint32
+}
+
+func NewAtomicVersion(v Version) *AtomicVersion {
+	av := &AtomicVersion{}
+	av.Store(v)
+	return av
+}
+
+func (av *AtomicVersion) Load() Version {
+	return Version(av.value.Load())
+}
+
+func (av *AtomicVersion) Store(v Version) {
+	av.value.Store(uint32(v))
+}
+
+func (av *AtomicVersion) CompareAndSwap(old, new Version) bool {
+	return av.value.CompareAndSwap(uint32(old), uint32(new))
+}
+
+func (av *AtomicVersion) Swap(new Version) Version {
+	return Version(av.value.Swap(uint32(new)))
+}
+
 type Device struct {
 	state struct {
 		// state holds the device's state. It is accessed atomically.
@@ -89,6 +127,9 @@ type Device struct {
 	ipcMutex sync.RWMutex
 	closed   chan struct{}
 	log      *Logger
+
+	version Version
+	awg     awg.Protocol
 }
 
 // deviceState represents the state of a Device.
@@ -162,7 +203,8 @@ func (device *Device) changeState(want deviceState) (err error) {
 			err = errDown
 		}
 	}
-	device.log.Verbosef("Interface state was %s, requested %s, now %s", old, want, device.deviceState())
+	device.log.Verbosef(
+		"Interface state was %s, requested %s, now %s", old, want, device.deviceState())
 	return
 }
 
@@ -395,6 +437,8 @@ func (device *Device) Close() {
 
 	device.rate.limiter.Close()
 
+	device.resetProtocol()
+
 	device.log.Verbosef("Device closed")
 	close(device.closed)
 }
@@ -534,3 +578,261 @@ func (device *Device) BindClose() error {
 	device.net.Unlock()
 	return err
 }
+func (device *Device) isAWG() bool {
+	return device.version >= VersionAwg
+}
+
+func (device *Device) resetProtocol() {
+	// restore default message type values
+	MessageInitiationType = DefaultMessageInitiationType
+	MessageResponseType = DefaultMessageResponseType
+	MessageCookieReplyType = DefaultMessageCookieReplyType
+	MessageTransportType = DefaultMessageTransportType
+}
+
+func (device *Device) handlePostConfig(tempAwg *awg.Protocol) error {
+	if !tempAwg.ASecCfg.IsSet && !tempAwg.HandshakeHandler.IsSet {
+		return nil
+	}
+
+	var errs []error
+
+	isASecOn := false
+	device.awg.ASecMux.Lock()
+	if tempAwg.ASecCfg.JunkPacketCount < 0 {
+		errs = append(errs, ipcErrorf(
+			ipc.IpcErrorInvalid,
+			"JunkPacketCount should be non negative",
+		),
+		)
+	}
+	device.awg.ASecCfg.JunkPacketCount = tempAwg.ASecCfg.JunkPacketCount
+	if tempAwg.ASecCfg.JunkPacketCount != 0 {
+		isASecOn = true
+	}
+
+	device.awg.ASecCfg.JunkPacketMinSize = tempAwg.ASecCfg.JunkPacketMinSize
+	if tempAwg.ASecCfg.JunkPacketMinSize != 0 {
+		isASecOn = true
+	}
+
+	if device.awg.ASecCfg.JunkPacketCount > 0 &&
+		tempAwg.ASecCfg.JunkPacketMaxSize == tempAwg.ASecCfg.JunkPacketMinSize {
+
+		tempAwg.ASecCfg.JunkPacketMaxSize++ // to make rand gen work
+	}
+
+	if tempAwg.ASecCfg.JunkPacketMaxSize >= MaxSegmentSize {
+		device.awg.ASecCfg.JunkPacketMinSize = 0
+		device.awg.ASecCfg.JunkPacketMaxSize = 1
+		errs = append(errs, ipcErrorf(
+			ipc.IpcErrorInvalid,
+			"JunkPacketMaxSize: %d; should be smaller than maxSegmentSize: %d",
+			tempAwg.ASecCfg.JunkPacketMaxSize,
+			MaxSegmentSize,
+		))
+	} else if tempAwg.ASecCfg.JunkPacketMaxSize < tempAwg.ASecCfg.JunkPacketMinSize {
+		errs = append(errs, ipcErrorf(
+			ipc.IpcErrorInvalid,
+			"maxSize: %d; should be greater than minSize: %d",
+			tempAwg.ASecCfg.JunkPacketMaxSize,
+			tempAwg.ASecCfg.JunkPacketMinSize,
+		))
+	} else {
+		device.awg.ASecCfg.JunkPacketMaxSize = tempAwg.ASecCfg.JunkPacketMaxSize
+	}
+
+	if tempAwg.ASecCfg.JunkPacketMaxSize != 0 {
+		isASecOn = true
+	}
+
+	newInitSize := MessageInitiationSize + tempAwg.ASecCfg.InitHeaderJunkSize
+
+	if newInitSize >= MaxSegmentSize {
+		errs = append(errs, ipcErrorf(
+			ipc.IpcErrorInvalid,
+			`init header size(148) + junkSize:%d; should be smaller than maxSegmentSize: %d`,
+			tempAwg.ASecCfg.InitHeaderJunkSize,
+			MaxSegmentSize,
+		),
+		)
+	} else {
+		device.awg.ASecCfg.InitHeaderJunkSize = tempAwg.ASecCfg.InitHeaderJunkSize
+	}
+
+	if tempAwg.ASecCfg.InitHeaderJunkSize != 0 {
+		isASecOn = true
+	}
+
+	newResponseSize := MessageResponseSize + tempAwg.ASecCfg.ResponseHeaderJunkSize
+
+	if newResponseSize >= MaxSegmentSize {
+		errs = append(errs, ipcErrorf(
+			ipc.IpcErrorInvalid,
+			`response header size(92) + junkSize:%d; should be smaller than maxSegmentSize: %d`,
+			tempAwg.ASecCfg.ResponseHeaderJunkSize,
+			MaxSegmentSize,
+		),
+		)
+	} else {
+		device.awg.ASecCfg.ResponseHeaderJunkSize = tempAwg.ASecCfg.ResponseHeaderJunkSize
+	}
+
+	if tempAwg.ASecCfg.ResponseHeaderJunkSize != 0 {
+		isASecOn = true
+	}
+
+	newCookieSize := MessageCookieReplySize + tempAwg.ASecCfg.CookieReplyHeaderJunkSize
+
+	if newCookieSize >= MaxSegmentSize {
+		errs = append(errs, ipcErrorf(
+			ipc.IpcErrorInvalid,
+			`cookie reply size(92) + junkSize:%d; should be smaller than maxSegmentSize: %d`,
+			tempAwg.ASecCfg.CookieReplyHeaderJunkSize,
+			MaxSegmentSize,
+		),
+		)
+	} else {
+		device.awg.ASecCfg.CookieReplyHeaderJunkSize = tempAwg.ASecCfg.CookieReplyHeaderJunkSize
+	}
+
+	if tempAwg.ASecCfg.CookieReplyHeaderJunkSize != 0 {
+		isASecOn = true
+	}
+
+	newTransportSize := MessageTransportSize + tempAwg.ASecCfg.TransportHeaderJunkSize
+
+	if newTransportSize >= MaxSegmentSize {
+		errs = append(errs, ipcErrorf(
+			ipc.IpcErrorInvalid,
+			`transport size(92) + junkSize:%d; should be smaller than maxSegmentSize: %d`,
+			tempAwg.ASecCfg.TransportHeaderJunkSize,
+			MaxSegmentSize,
+		),
+		)
+	} else {
+		device.awg.ASecCfg.TransportHeaderJunkSize = tempAwg.ASecCfg.TransportHeaderJunkSize
+	}
+
+	if tempAwg.ASecCfg.TransportHeaderJunkSize != 0 {
+		isASecOn = true
+	}
+
+	if tempAwg.ASecCfg.InitPacketMagicHeader > 4 {
+		isASecOn = true
+		device.log.Verbosef("UAPI: Updating init_packet_magic_header")
+		device.awg.ASecCfg.InitPacketMagicHeader = tempAwg.ASecCfg.InitPacketMagicHeader
+		MessageInitiationType = device.awg.ASecCfg.InitPacketMagicHeader
+	} else {
+		device.log.Verbosef("UAPI: Using default init type")
+		MessageInitiationType = DefaultMessageInitiationType
+	}
+
+	if tempAwg.ASecCfg.ResponsePacketMagicHeader > 4 {
+		isASecOn = true
+		device.log.Verbosef("UAPI: Updating response_packet_magic_header")
+		device.awg.ASecCfg.ResponsePacketMagicHeader = tempAwg.ASecCfg.ResponsePacketMagicHeader
+		MessageResponseType = device.awg.ASecCfg.ResponsePacketMagicHeader
+	} else {
+		device.log.Verbosef("UAPI: Using default response type")
+		MessageResponseType = DefaultMessageResponseType
+	}
+
+	if tempAwg.ASecCfg.UnderloadPacketMagicHeader > 4 {
+		isASecOn = true
+		device.log.Verbosef("UAPI: Updating underload_packet_magic_header")
+		device.awg.ASecCfg.UnderloadPacketMagicHeader = tempAwg.ASecCfg.UnderloadPacketMagicHeader
+		MessageCookieReplyType = device.awg.ASecCfg.UnderloadPacketMagicHeader
+	} else {
+		device.log.Verbosef("UAPI: Using default underload type")
+		MessageCookieReplyType = DefaultMessageCookieReplyType
+	}
+
+	if tempAwg.ASecCfg.TransportPacketMagicHeader > 4 {
+		isASecOn = true
+		device.log.Verbosef("UAPI: Updating transport_packet_magic_header")
+		device.awg.ASecCfg.TransportPacketMagicHeader = tempAwg.ASecCfg.TransportPacketMagicHeader
+		MessageTransportType = device.awg.ASecCfg.TransportPacketMagicHeader
+	} else {
+		device.log.Verbosef("UAPI: Using default transport type")
+		MessageTransportType = DefaultMessageTransportType
+	}
+
+	isSameHeaderMap := map[uint32]struct{}{
+		MessageInitiationType:  {},
+		MessageResponseType:    {},
+		MessageCookieReplyType: {},
+		MessageTransportType:   {},
+	}
+
+	// size will be different if same values
+	if len(isSameHeaderMap) != 4 {
+		errs = append(errs, ipcErrorf(
+			ipc.IpcErrorInvalid,
+			`magic headers should differ; got: init:%d; recv:%d; unde:%d; tran:%d`,
+			MessageInitiationType,
+			MessageResponseType,
+			MessageCookieReplyType,
+			MessageTransportType,
+		),
+		)
+	}
+
+	isSameSizeMap := map[int]struct{}{
+		newInitSize:      {},
+		newResponseSize:  {},
+		newCookieSize:    {},
+		newTransportSize: {},
+	}
+
+	if len(isSameSizeMap) != 4 {
+		errs = append(errs, ipcErrorf(
+			ipc.IpcErrorInvalid,
+			`new sizes should differ; init: %d; response: %d; cookie: %d; trans: %d`,
+			newInitSize,
+			newResponseSize,
+			newCookieSize,
+			newTransportSize,
+		),
+		)
+	} else {
+		msgTypeToJunkSize = map[uint32]int{
+			MessageInitiationType:  device.awg.ASecCfg.InitHeaderJunkSize,
+			MessageResponseType:    device.awg.ASecCfg.ResponseHeaderJunkSize,
+			MessageCookieReplyType: device.awg.ASecCfg.CookieReplyHeaderJunkSize,
+			MessageTransportType:   device.awg.ASecCfg.TransportHeaderJunkSize,
+		}
+
+		packetSizeToMsgType = map[int]uint32{
+			newInitSize:      MessageInitiationType,
+			newResponseSize:  MessageResponseType,
+			newCookieSize:    MessageCookieReplyType,
+			newTransportSize: MessageTransportType,
+		}
+	}
+
+	device.awg.IsASecOn.SetTo(isASecOn)
+	var err error
+	device.awg.JunkCreator, err = awg.NewJunkCreator(device.awg.ASecCfg)
+	if err != nil {
+		errs = append(errs, err)
+	}
+
+	if tempAwg.HandshakeHandler.IsSet {
+		if err := tempAwg.HandshakeHandler.Validate(MaxSegmentSize); err != nil {
+			errs = append(errs, ipcErrorf(
+				ipc.IpcErrorInvalid, "handshake handler validate: %w", err))
+		} else {
+			device.awg.HandshakeHandler = tempAwg.HandshakeHandler
+			device.awg.HandshakeHandler.ControlledJunk.DefaultJunkCount = tempAwg.ASecCfg.JunkPacketCount
+			device.awg.HandshakeHandler.SpecialJunk.DefaultJunkCount = tempAwg.ASecCfg.JunkPacketCount
+			device.version = VersionAwgSpecialHandshake
+		}
+	} else {
+		device.version = VersionAwg
+	}
+
+	device.awg.ASecMux.Unlock()
+
+	return errors.Join(errs...)
+}

device/device_test.go

@@ -1,29 +1,32 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package device
 
 import (
 	"bytes"
+	"context"
 	"encoding/hex"
 	"fmt"
 	"io"
 	"math/rand"
 	"net/netip"
 	"os"
+	"os/signal"
 	"runtime"
 	"runtime/pprof"
 	"sync"
-	"sync/atomic"
 	"testing"
 	"time"
 
-	"golang.zx2c4.com/wireguard/conn"
-	"golang.zx2c4.com/wireguard/conn/bindtest"
-	"golang.zx2c4.com/wireguard/tun"
-	"golang.zx2c4.com/wireguard/tun/tuntest"
+	"go.uber.org/atomic"
+
+	"github.com/amnezia-vpn/amneziawg-go/conn"
+	"github.com/amnezia-vpn/amneziawg-go/conn/bindtest"
+	"github.com/amnezia-vpn/amneziawg-go/tun"
+	"github.com/amnezia-vpn/amneziawg-go/tun/tuntest"
 )
 
 // uapiCfg returns a string that contains cfg formatted use with IpcSet.
@@ -50,7 +53,7 @@ func uapiCfg(cfg ...string) 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, endpointCfgs [2]string) {
+func genConfigs(tb testing.TB, cfg ...string) (cfgs, endpointCfgs [2]string) {
 	var key1, key2 NoisePrivateKey
 	_, err := rand.Read(key1[:])
 	if err != nil {
@@ -62,7 +65,8 @@ func genConfigs(tb testing.TB) (cfgs, endpointCfgs [2]string) {
 	}
 	pub1, pub2 := key1.publicKey(), key2.publicKey()
 
-	cfgs[0] = uapiCfg(
+	args0 := append([]string(nil), cfg...)
+	args0 = append(args0, []string{
 		"private_key", hex.EncodeToString(key1[:]),
 		"listen_port", "0",
 		"replace_peers", "true",
@@ -70,12 +74,16 @@ func genConfigs(tb testing.TB) (cfgs, endpointCfgs [2]string) {
 		"protocol_version", "1",
 		"replace_allowed_ips", "true",
 		"allowed_ip", "1.0.0.2/32",
-	)
+	}...)
+	cfgs[0] = uapiCfg(args0...)
+
 	endpointCfgs[0] = uapiCfg(
 		"public_key", hex.EncodeToString(pub2[:]),
 		"endpoint", "127.0.0.1:%d",
 	)
-	cfgs[1] = uapiCfg(
+
+	args1 := append([]string(nil), cfg...)
+	args1 = append(args1, []string{
 		"private_key", hex.EncodeToString(key2[:]),
 		"listen_port", "0",
 		"replace_peers", "true",
@@ -83,7 +91,9 @@ func genConfigs(tb testing.TB) (cfgs, endpointCfgs [2]string) {
 		"protocol_version", "1",
 		"replace_allowed_ips", "true",
 		"allowed_ip", "1.0.0.1/32",
-	)
+	}...)
+
+	cfgs[1] = uapiCfg(args1...)
 	endpointCfgs[1] = uapiCfg(
 		"public_key", hex.EncodeToString(pub1[:]),
 		"endpoint", "127.0.0.1:%d",
@@ -115,16 +125,21 @@ func (d SendDirection) String() string {
 	return "pong"
 }
 
-func (pair *testPair) Send(tb testing.TB, ping SendDirection, done chan struct{}) {
+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)
+	timer := time.NewTimer(6 * time.Second)
 	defer timer.Stop()
 	var err error
 	select {
@@ -149,8 +164,14 @@ func (pair *testPair) Send(tb testing.TB, ping SendDirection, done chan struct{}
 }
 
 // genTestPair creates a testPair.
-func genTestPair(tb testing.TB, realSocket bool) (pair testPair) {
-	cfg, endpointCfg := genConfigs(tb)
+func genTestPair(
+	tb testing.TB,
+	realSocket bool,
+	extraCfg ...string,
+) (pair testPair) {
+	var cfg, endpointCfg [2]string
+	cfg, endpointCfg = genConfigs(tb, extraCfg...)
+
 	var binds [2]conn.Bind
 	if realSocket {
 		binds[0], binds[1] = conn.NewDefaultBind(), conn.NewDefaultBind()
@@ -203,6 +224,76 @@ func TestTwoDevicePing(t *testing.T) {
 	})
 }
 
+// Run test with -race=false to avoid the race for setting the default msgTypes 2 times
+func TestAWGDevicePing(t *testing.T) {
+	goroutineLeakCheck(t)
+
+	pair := genTestPair(t, true,
+		"jc", "5",
+		"jmin", "500",
+		"jmax", "1000",
+		"s1", "30",
+		"s2", "40",
+		"s3", "50",
+		"s4", "5",
+		"h1", "123456",
+		"h2", "67543",
+		"h3", "123123",
+		"h4", "32345",
+	)
+	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)
+	})
+}
+
+// Needs to be stopped with Ctrl-C
+func TestAWGHandshakeDevicePing(t *testing.T) {
+	t.Skip("This test is intended to be run manually, not as part of the test suite.")
+
+	signalContext, cancel := signal.NotifyContext(context.Background(), os.Interrupt)
+	defer cancel()
+	isRunning := atomic.NewBool(true)
+	go func() {
+		<-signalContext.Done()
+		fmt.Println("Waiting to finish")
+		isRunning.Store(false)
+	}()
+
+	goroutineLeakCheck(t)
+	pair := genTestPair(t, true,
+		"i1", "<b 0xf6ab3267fa><c><b 0xf6ab><t><r 10><wt 10>",
+		"i2", "<b 0xf6ab3267fa><r 100>",
+		"j1", "<b 0xffffffff><c><b 0xf6ab><t><r 10>",
+		"j2", "<c><b 0xf6ab><t><wt 1000>",
+		"j3", "<t><b 0xf6ab><c><r 10>",
+		"itime", "60",
+		// "jc", "1",
+		// "jmin", "500",
+		// "jmax", "1000",
+		// "s1", "30",
+		// "s2", "40",
+		// "h1", "123456",
+		// "h2", "67543",
+		// "h4", "32345",
+		// "h3", "123123",
+	)
+	t.Run("ping 1.0.0.1", func(t *testing.T) {
+		for isRunning.Load() {
+			pair.Send(t, Ping, nil)
+			time.Sleep(2 * time.Second)
+		}
+	})
+	t.Run("ping 1.0.0.2", func(t *testing.T) {
+		for isRunning.Load() {
+			pair.Send(t, Pong, nil)
+			time.Sleep(2 * time.Second)
+		}
+	})
+}
+
 func TestUpDown(t *testing.T) {
 	goroutineLeakCheck(t)
 	const itrials = 50
@@ -423,29 +514,43 @@ type fakeBindSized struct {
 	size int
 }
 
-func (b *fakeBindSized) Open(port uint16) (fns []conn.ReceiveFunc, actualPort uint16, err error) {
+func (b *fakeBindSized) Open(
+	port uint16,
+) (fns []conn.ReceiveFunc, actualPort uint16, err error) {
 	return nil, 0, nil
 }
-func (b *fakeBindSized) Close() error                                  { return nil }
-func (b *fakeBindSized) SetMark(mark uint32) error                     { return nil }
-func (b *fakeBindSized) Send(bufs [][]byte, ep conn.Endpoint) error    { return nil }
+
+func (b *fakeBindSized) Close() error { return nil }
+
+func (b *fakeBindSized) SetMark(mark uint32) error { return nil }
+
+func (b *fakeBindSized) Send(bufs [][]byte, ep conn.Endpoint) error { return nil }
+
 func (b *fakeBindSized) ParseEndpoint(s string) (conn.Endpoint, error) { return nil, nil }
-func (b *fakeBindSized) BatchSize() int                                { return b.size }
+
+func (b *fakeBindSized) BatchSize() int { return b.size }
 
 type fakeTUNDeviceSized struct {
 	size int
 }
 
 func (t *fakeTUNDeviceSized) File() *os.File { return nil }
+
 func (t *fakeTUNDeviceSized) Read(bufs [][]byte, sizes []int, offset int) (n int, err error) {
 	return 0, nil
 }
+
 func (t *fakeTUNDeviceSized) Write(bufs [][]byte, offset int) (int, error) { return 0, nil }
-func (t *fakeTUNDeviceSized) MTU() (int, error)                            { return 0, nil }
-func (t *fakeTUNDeviceSized) Name() (string, error)                        { return "", nil }
-func (t *fakeTUNDeviceSized) Events() <-chan tun.Event                     { return nil }
-func (t *fakeTUNDeviceSized) Close() error                                 { return nil }
-func (t *fakeTUNDeviceSized) BatchSize() int                               { return t.size }
+
+func (t *fakeTUNDeviceSized) MTU() (int, error) { return 0, nil }
+
+func (t *fakeTUNDeviceSized) Name() (string, error) { return "", nil }
+
+func (t *fakeTUNDeviceSized) Events() <-chan tun.Event { return nil }
+
+func (t *fakeTUNDeviceSized) Close() error { return nil }
+
+func (t *fakeTUNDeviceSized) BatchSize() int { return t.size }
 
 func TestBatchSize(t *testing.T) {
 	d := Device{}

device/endpoint_test.go

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package device

device/indextable.go

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package device

device/ip.go

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package device

device/kdf_test.go

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package device

device/keypair.go

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package device
@@ -11,7 +11,7 @@ import (
 	"sync/atomic"
 	"time"
 
-	"golang.zx2c4.com/wireguard/replay"
+	"github.com/amnezia-vpn/amneziawg-go/replay"
 )
 
 /* Due to limitations in Go and /x/crypto there is currently

device/logger.go

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package device

device/mobilequirks.go

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package device

device/noise-helpers.go

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package device

device/noise-protocol.go

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package device
@@ -15,7 +15,7 @@ import (
 	"golang.org/x/crypto/chacha20poly1305"
 	"golang.org/x/crypto/poly1305"
 
-	"golang.zx2c4.com/wireguard/tai64n"
+	"github.com/amnezia-vpn/amneziawg-go/tai64n"
 )
 
 type handshakeState int
@@ -53,10 +53,17 @@ const (
 )
 
 const (
-	MessageInitiationType  = 1
-	MessageResponseType    = 2
-	MessageCookieReplyType = 3
-	MessageTransportType   = 4
+	DefaultMessageInitiationType  uint32 = 1
+	DefaultMessageResponseType    uint32 = 2
+	DefaultMessageCookieReplyType uint32 = 3
+	DefaultMessageTransportType   uint32 = 4
+)
+
+var (
+	MessageInitiationType  uint32 = DefaultMessageInitiationType
+	MessageResponseType    uint32 = DefaultMessageResponseType
+	MessageCookieReplyType uint32 = DefaultMessageCookieReplyType
+	MessageTransportType   uint32 = DefaultMessageTransportType
 )
 
 const (
@@ -75,6 +82,11 @@ const (
 	MessageTransportOffsetContent  = 16
 )
 
+var (
+	packetSizeToMsgType map[int]uint32
+	msgTypeToJunkSize   map[uint32]int
+)
+
 /* Type is an 8-bit field, followed by 3 nul bytes,
  * by marshalling the messages in little-endian byteorder
  * we can treat these as a 32-bit unsigned int (for now)
@@ -193,10 +205,12 @@ func (device *Device) CreateMessageInitiation(peer *Peer) (*MessageInitiation, e
 
 	handshake.mixHash(handshake.remoteStatic[:])
 
+	device.awg.ASecMux.RLock()
 	msg := MessageInitiation{
 		Type:      MessageInitiationType,
 		Ephemeral: handshake.localEphemeral.publicKey(),
 	}
+	device.awg.ASecMux.RUnlock()
 
 	handshake.mixKey(msg.Ephemeral[:])
 	handshake.mixHash(msg.Ephemeral[:])
@@ -250,9 +264,12 @@ func (device *Device) ConsumeMessageInitiation(msg *MessageInitiation) *Peer {
 		chainKey [blake2s.Size]byte
 	)
 
+	device.awg.ASecMux.RLock()
 	if msg.Type != MessageInitiationType {
+		device.awg.ASecMux.RUnlock()
 		return nil
 	}
+	device.awg.ASecMux.RUnlock()
 
 	device.staticIdentity.RLock()
 	defer device.staticIdentity.RUnlock()
@@ -367,7 +384,9 @@ func (device *Device) CreateMessageResponse(peer *Peer) (*MessageResponse, error
 	}
 
 	var msg MessageResponse
+	device.awg.ASecMux.RLock()
 	msg.Type = MessageResponseType
+	device.awg.ASecMux.RUnlock()
 	msg.Sender = handshake.localIndex
 	msg.Receiver = handshake.remoteIndex
 
@@ -417,9 +436,12 @@ func (device *Device) CreateMessageResponse(peer *Peer) (*MessageResponse, error
 }
 
 func (device *Device) ConsumeMessageResponse(msg *MessageResponse) *Peer {
+	device.awg.ASecMux.RLock()
 	if msg.Type != MessageResponseType {
+		device.awg.ASecMux.RUnlock()
 		return nil
 	}
+	device.awg.ASecMux.RUnlock()
 
 	// lookup handshake by receiver
 

device/noise-types.go

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package device

device/noise_test.go

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package device
@@ -10,8 +10,8 @@ import (
 	"encoding/binary"
 	"testing"
 
-	"golang.zx2c4.com/wireguard/conn"
-	"golang.zx2c4.com/wireguard/tun/tuntest"
+	"github.com/amnezia-vpn/amneziawg-go/conn"
+	"github.com/amnezia-vpn/amneziawg-go/tun/tuntest"
 )
 
 func TestCurveWrappers(t *testing.T) {

device/peer.go

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package device
@@ -12,7 +12,8 @@ import (
 	"sync/atomic"
 	"time"
 
-	"golang.zx2c4.com/wireguard/conn"
+	"github.com/amnezia-vpn/amneziawg-go/conn"
+	"github.com/amnezia-vpn/amneziawg-go/device/awg"
 )
 
 type Peer struct {
@@ -113,6 +114,16 @@ func (device *Device) NewPeer(pk NoisePublicKey) (*Peer, error) {
 	return peer, nil
 }
 
+func (peer *Peer) SendAndCountBuffers(buffers [][]byte) error {
+	err := peer.SendBuffers(buffers)
+	if err == nil {
+		awg.PacketCounter.Add(uint64(len(buffers)))
+		return nil
+	}
+
+	return err
+}
+
 func (peer *Peer) SendBuffers(buffers [][]byte) error {
 	peer.device.net.RLock()
 	defer peer.device.net.RUnlock()

device/pools.go

@@ -1,20 +1,19 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package device
 
 import (
 	"sync"
-	"sync/atomic"
 )
 
 type WaitPool struct {
 	pool  sync.Pool
 	cond  sync.Cond
 	lock  sync.Mutex
-	count atomic.Uint32
+	count uint32 // Get calls not yet Put back
 	max   uint32
 }
 
@@ -27,10 +26,10 @@ func NewWaitPool(max uint32, new func() any) *WaitPool {
 func (p *WaitPool) Get() any {
 	if p.max != 0 {
 		p.lock.Lock()
-		for p.count.Load() >= p.max {
+		for p.count >= p.max {
 			p.cond.Wait()
 		}
-		p.count.Add(1)
+		p.count++
 		p.lock.Unlock()
 	}
 	return p.pool.Get()
@@ -41,7 +40,9 @@ func (p *WaitPool) Put(x any) {
 	if p.max == 0 {
 		return
 	}
-	p.count.Add(^uint32(0))
+	p.lock.Lock()
+	defer p.lock.Unlock()
+	p.count--
 	p.cond.Signal()
 }
 

device/pools_test.go

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package device
@@ -32,7 +32,9 @@ func TestWaitPool(t *testing.T) {
 	wg.Add(workers)
 	var max atomic.Uint32
 	updateMax := func() {
-		count := p.count.Load()
+		p.lock.Lock()
+		count := p.count
+		p.lock.Unlock()
 		if count > p.max {
 			t.Errorf("count (%d) > max (%d)", count, p.max)
 		}

device/queueconstants_android.go

@@ -1,11 +1,11 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package device
 
-import "golang.zx2c4.com/wireguard/conn"
+import "github.com/amnezia-vpn/amneziawg-go/conn"
 
 /* Reduce memory consumption for Android */
 

device/queueconstants_default.go

@@ -2,12 +2,12 @@
 
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package device
 
-import "golang.zx2c4.com/wireguard/conn"
+import "github.com/amnezia-vpn/amneziawg-go/conn"
 
 const (
 	QueueStagedSize            = conn.IdealBatchSize

device/queueconstants_ios.go

@@ -2,7 +2,7 @@
 
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package device

device/queueconstants_windows.go

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package device

device/race_disabled_test.go

@@ -2,7 +2,7 @@
 
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package device

device/race_enabled_test.go

@@ -2,7 +2,7 @@
 
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package device

device/receive.go

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package device
@@ -13,10 +13,10 @@ import (
 	"sync"
 	"time"
 
+	"github.com/amnezia-vpn/amneziawg-go/conn"
 	"golang.org/x/crypto/chacha20poly1305"
 	"golang.org/x/net/ipv4"
 	"golang.org/x/net/ipv6"
-	"golang.zx2c4.com/wireguard/conn"
 )
 
 type QueueHandshakeElement struct {
@@ -70,7 +70,10 @@ func (peer *Peer) keepKeyFreshReceiving() {
  * Every time the bind is updated a new routine is started for
  * IPv4 and IPv6 (separately)
  */
-func (device *Device) RoutineReceiveIncoming(maxBatchSize int, recv conn.ReceiveFunc) {
+func (device *Device) RoutineReceiveIncoming(
+	maxBatchSize int,
+	recv conn.ReceiveFunc,
+) {
 	recvName := recv.PrettyName()
 	defer func() {
 		device.log.Verbosef("Routine: receive incoming %s - stopped", recvName)
@@ -126,6 +129,7 @@ func (device *Device) RoutineReceiveIncoming(maxBatchSize int, recv conn.Receive
 		}
 		deathSpiral = 0
 
+		device.awg.ASecMux.RLock()
 		// handle each packet in the batch
 		for i, size := range sizes[:count] {
 			if size < MinMessageSize {
@@ -133,9 +137,44 @@ func (device *Device) RoutineReceiveIncoming(maxBatchSize int, recv conn.Receive
 			}
 
 			// check size of packet
-
 			packet := bufsArrs[i][:size]
-			msgType := binary.LittleEndian.Uint32(packet[:4])
+			var msgType uint32
+			if device.isAWG() {
+				// TODO:
+				// if awg.WaitResponse.ShouldWait.IsSet() {
+				// 	awg.WaitResponse.Channel <- struct{}{}
+				// }
+
+				if assumedMsgType, ok := packetSizeToMsgType[size]; ok {
+					junkSize := msgTypeToJunkSize[assumedMsgType]
+					// transport size can align with other header types;
+					// making sure we have the right msgType
+					msgType = binary.LittleEndian.Uint32(packet[junkSize : junkSize+4])
+					if msgType == assumedMsgType {
+						packet = packet[junkSize:]
+					} else {
+						device.log.Verbosef("transport packet lined up with another msg type")
+						msgType = binary.LittleEndian.Uint32(packet[:4])
+					}
+				} else {
+					transportJunkSize := device.awg.ASecCfg.TransportHeaderJunkSize
+					msgType = binary.LittleEndian.Uint32(packet[transportJunkSize : transportJunkSize+4])
+					if msgType != MessageTransportType {
+						// probably a junk packet
+						device.log.Verbosef("aSec: Received message with unknown type: %d", msgType)
+						continue
+					}
+
+					// remove junk from bufsArrs by shifting the packet
+					// this buffer is also used for decryption, so it needs to be corrected
+					copy(bufsArrs[i][:size], packet[transportJunkSize:])
+					size -= transportJunkSize
+					// need to reinitialize packet as well
+					packet = packet[:size]
+				}
+			} else {
+				msgType = binary.LittleEndian.Uint32(packet[:4])
+			}
 
 			switch msgType {
 
@@ -220,6 +259,7 @@ func (device *Device) RoutineReceiveIncoming(maxBatchSize int, recv conn.Receive
 			default:
 			}
 		}
+		device.awg.ASecMux.RUnlock()
 		for peer, elemsContainer := range elemsByPeer {
 			if peer.isRunning.Load() {
 				peer.queue.inbound.c <- elemsContainer
@@ -278,6 +318,8 @@ func (device *Device) RoutineHandshake(id int) {
 
 	for elem := range device.queue.handshake.c {
 
+		device.awg.ASecMux.RLock()
+
 		// handle cookie fields and ratelimiting
 
 		switch elem.msgType {
@@ -305,9 +347,14 @@ func (device *Device) RoutineHandshake(id int) {
 			// consume reply
 
 			if peer := entry.peer; peer.isRunning.Load() {
-				device.log.Verbosef("Receiving cookie response from %s", elem.endpoint.DstToString())
+				device.log.Verbosef(
+					"Receiving cookie response from %s",
+					elem.endpoint.DstToString(),
+				)
 				if !peer.cookieGenerator.ConsumeReply(&reply) {
-					device.log.Verbosef("Could not decrypt invalid cookie response")
+					device.log.Verbosef(
+						"Could not decrypt invalid cookie response",
+					)
 				}
 			}
 
@@ -349,9 +396,7 @@ func (device *Device) RoutineHandshake(id int) {
 
 		switch elem.msgType {
 		case MessageInitiationType:
-
 			// unmarshal
-
 			var msg MessageInitiation
 			reader := bytes.NewReader(elem.packet)
 			err := binary.Read(reader, binary.LittleEndian, &msg)
@@ -361,7 +406,6 @@ func (device *Device) RoutineHandshake(id int) {
 			}
 
 			// consume initiation
-
 			peer := device.ConsumeMessageInitiation(&msg)
 			if peer == nil {
 				device.log.Verbosef("Received invalid initiation message from %s", elem.endpoint.DstToString())
@@ -426,6 +470,7 @@ func (device *Device) RoutineHandshake(id int) {
 			peer.SendKeepalive()
 		}
 	skip:
+		device.awg.ASecMux.RUnlock()
 		device.PutMessageBuffer(elem.buffer)
 	}
 }
@@ -507,11 +552,17 @@ func (peer *Peer) RoutineSequentialReceiver(maxBatchSize int) {
 				}
 
 			default:
-				device.log.Verbosef("Packet with invalid IP version from %v", peer)
+				device.log.Verbosef(
+					"Packet with invalid IP version from %v",
+					peer,
+				)
 				continue
 			}
 
-			bufs = append(bufs, elem.buffer[:MessageTransportOffsetContent+len(elem.packet)])
+			bufs = append(
+				bufs,
+				elem.buffer[:MessageTransportOffsetContent+len(elem.packet)],
+			)
 		}
 
 		peer.rxBytes.Add(rxBytesLen)

device/send.go

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package device
@@ -14,11 +14,11 @@ import (
 	"sync"
 	"time"
 
+	"github.com/amnezia-vpn/amneziawg-go/conn"
+	"github.com/amnezia-vpn/amneziawg-go/tun"
 	"golang.org/x/crypto/chacha20poly1305"
 	"golang.org/x/net/ipv4"
 	"golang.org/x/net/ipv6"
-	"golang.zx2c4.com/wireguard/conn"
-	"golang.zx2c4.com/wireguard/tun"
 )
 
 /* Outbound flow
@@ -123,17 +123,66 @@ func (peer *Peer) SendHandshakeInitiation(isRetry bool) error {
 		peer.device.log.Errorf("%v - Failed to create initiation message: %v", peer, err)
 		return err
 	}
+	var sendBuffer [][]byte
+
+	// so only packet processed for cookie generation
+	var junkedHeader []byte
+	if peer.device.version >= VersionAwg {
+		var junks [][]byte
+		if peer.device.version == VersionAwgSpecialHandshake {
+			peer.device.awg.ASecMux.RLock()
+			// set junks depending on packet type
+			junks = peer.device.awg.HandshakeHandler.GenerateSpecialJunk()
+			if junks == nil {
+				junks = peer.device.awg.HandshakeHandler.GenerateControlledJunk()
+				if junks != nil {
+					peer.device.log.Verbosef("%v - Controlled junks sent", peer)
+				}
+			} else {
+				peer.device.log.Verbosef("%v - Special junks sent", peer)
+			}
+			peer.device.awg.ASecMux.RUnlock()
+		} else {
+			junks = make([][]byte, 0, peer.device.awg.ASecCfg.JunkPacketCount)
+		}
+		peer.device.awg.ASecMux.RLock()
+		err := peer.device.awg.JunkCreator.CreateJunkPackets(&junks)
+		peer.device.awg.ASecMux.RUnlock()
+
+		if err != nil {
+			peer.device.log.Errorf("%v - %v", peer, err)
+			return err
+		}
+
+		if len(junks) > 0 {
+			err = peer.SendBuffers(junks)
+
+			if err != nil {
+				peer.device.log.Errorf("%v - Failed to send junk packets: %v", peer, err)
+				return err
+			}
+		}
+
+		junkedHeader, err = peer.device.awg.CreateInitHeaderJunk()
+		if err != nil {
+			peer.device.log.Errorf("%v - %v", peer, err)
+			return err
+		}
+	}
 
 	var buf [MessageInitiationSize]byte
 	writer := bytes.NewBuffer(buf[:0])
 	binary.Write(writer, binary.LittleEndian, msg)
 	packet := writer.Bytes()
 	peer.cookieGenerator.AddMacs(packet)
+	junkedHeader = append(junkedHeader, packet...)
 
 	peer.timersAnyAuthenticatedPacketTraversal()
 	peer.timersAnyAuthenticatedPacketSent()
 
-	err = peer.SendBuffers([][]byte{packet})
+	sendBuffer = append(sendBuffer, junkedHeader)
+
+	err = peer.SendAndCountBuffers(sendBuffer)
 	if err != nil {
 		peer.device.log.Errorf("%v - Failed to send handshake initiation: %v", peer, err)
 	}
@@ -155,11 +204,19 @@ func (peer *Peer) SendHandshakeResponse() error {
 		return err
 	}
 
+	junkedHeader, err := peer.device.awg.CreateResponseHeaderJunk()
+	if err != nil {
+		peer.device.log.Errorf("%v - %v", peer, err)
+		return err
+	}
+
 	var buf [MessageResponseSize]byte
 	writer := bytes.NewBuffer(buf[:0])
+
 	binary.Write(writer, binary.LittleEndian, response)
 	packet := writer.Bytes()
 	peer.cookieGenerator.AddMacs(packet)
+	junkedHeader = append(junkedHeader, packet...)
 
 	err = peer.BeginSymmetricSession()
 	if err != nil {
@@ -172,28 +229,42 @@ func (peer *Peer) SendHandshakeResponse() error {
 	peer.timersAnyAuthenticatedPacketSent()
 
 	// TODO: allocation could be avoided
-	err = peer.SendBuffers([][]byte{packet})
+	err = peer.SendAndCountBuffers([][]byte{junkedHeader})
 	if err != nil {
 		peer.device.log.Errorf("%v - Failed to send handshake response: %v", peer, err)
 	}
 	return err
 }
 
-func (device *Device) SendHandshakeCookie(initiatingElem *QueueHandshakeElement) error {
+func (device *Device) SendHandshakeCookie(
+	initiatingElem *QueueHandshakeElement,
+) error {
 	device.log.Verbosef("Sending cookie response for denied handshake message for %v", initiatingElem.endpoint.DstToString())
 
 	sender := binary.LittleEndian.Uint32(initiatingElem.packet[4:8])
-	reply, err := device.cookieChecker.CreateReply(initiatingElem.packet, sender, initiatingElem.endpoint.DstToBytes())
+	reply, err := device.cookieChecker.CreateReply(
+		initiatingElem.packet,
+		sender,
+		initiatingElem.endpoint.DstToBytes(),
+	)
 	if err != nil {
 		device.log.Errorf("Failed to create cookie reply: %v", err)
 		return err
 	}
 
+	junkedHeader, err := device.awg.CreateCookieReplyHeaderJunk()
+	if err != nil {
+		device.log.Errorf("%v - %v", device, err)
+		return err
+	}
+
 	var buf [MessageCookieReplySize]byte
 	writer := bytes.NewBuffer(buf[:0])
 	binary.Write(writer, binary.LittleEndian, reply)
+
+	junkedHeader = append(junkedHeader, writer.Bytes()...)
 	// TODO: allocation could be avoided
-	device.net.bind.Send([][]byte{writer.Bytes()}, initiatingElem.endpoint)
+	device.net.bind.Send([][]byte{junkedHeader}, initiatingElem.endpoint)
 	return nil
 }
 
@@ -506,6 +577,7 @@ func (peer *Peer) RoutineSequentialSender(maxBatchSize int) {
 				device.PutMessageBuffer(elem.buffer)
 				device.PutOutboundElement(elem)
 			}
+			device.PutOutboundElementsContainer(elemsContainer)
 			continue
 		}
 		dataSent := false
@@ -513,6 +585,14 @@ func (peer *Peer) RoutineSequentialSender(maxBatchSize int) {
 		for _, elem := range elemsContainer.elems {
 			if len(elem.packet) != MessageKeepaliveSize {
 				dataSent = true
+
+				junkedHeader, err := device.awg.CreateTransportHeaderJunk(len(elem.packet))
+				if err != nil {
+					device.log.Errorf("%v - %v", device, err)
+					continue
+				}
+
+				elem.packet = append(junkedHeader, elem.packet...)
 			}
 			bufs = append(bufs, elem.packet)
 		}
@@ -520,10 +600,11 @@ func (peer *Peer) RoutineSequentialSender(maxBatchSize int) {
 		peer.timersAnyAuthenticatedPacketTraversal()
 		peer.timersAnyAuthenticatedPacketSent()
 
-		err := peer.SendBuffers(bufs)
+		err := peer.SendAndCountBuffers(bufs)
 		if dataSent {
 			peer.timersDataSent()
 		}
+
 		for _, elem := range elemsContainer.elems {
 			device.PutMessageBuffer(elem.buffer)
 			device.PutOutboundElement(elem)

device/sticky_default.go

@@ -3,10 +3,10 @@
 package device
 
 import (
-	"golang.zx2c4.com/wireguard/conn"
-	"golang.zx2c4.com/wireguard/rwcancel"
+	"github.com/amnezia-vpn/amneziawg-go/conn"
+	"github.com/amnezia-vpn/amneziawg-go/rwcancel"
 )
 
-func (device *Device) startRouteListener(bind conn.Bind) (*rwcancel.RWCancel, error) {
+func (device *Device) startRouteListener(_ conn.Bind) (*rwcancel.RWCancel, error) {
 	return nil, nil
 }

device/sticky_linux.go

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  *
  * This implements userspace semantics of "sticky sockets", modeled after
  * WireGuard's kernelspace implementation. This is more or less a straight port
@@ -9,7 +9,7 @@
  *
  * Currently there is no way to achieve this within the net package:
  * See e.g. https://github.com/golang/go/issues/17930
- * So this code is remains platform dependent.
+ * So this code remains platform dependent.
  */
 
 package device
@@ -20,8 +20,8 @@ import (
 
 	"golang.org/x/sys/unix"
 
-	"golang.zx2c4.com/wireguard/conn"
-	"golang.zx2c4.com/wireguard/rwcancel"
+	"github.com/amnezia-vpn/amneziawg-go/conn"
+	"github.com/amnezia-vpn/amneziawg-go/rwcancel"
 )
 
 func (device *Device) startRouteListener(bind conn.Bind) (*rwcancel.RWCancel, error) {
@@ -47,7 +47,7 @@ func (device *Device) startRouteListener(bind conn.Bind) (*rwcancel.RWCancel, er
 	return netlinkCancel, nil
 }
 
-func (device *Device) routineRouteListener(bind conn.Bind, netlinkSock int, netlinkCancel *rwcancel.RWCancel) {
+func (device *Device) routineRouteListener(_ conn.Bind, netlinkSock int, netlinkCancel *rwcancel.RWCancel) {
 	type peerEndpointPtr struct {
 		peer     *Peer
 		endpoint *conn.Endpoint

device/timers.go

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  *
  * This is based heavily on timers.c from the kernel implementation.
  */

device/tun.go

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package device
@@ -8,7 +8,7 @@ package device
 import (
 	"fmt"
 
-	"golang.zx2c4.com/wireguard/tun"
+	"github.com/amnezia-vpn/amneziawg-go/tun"
 )
 
 const DefaultMTU = 1420

device/uapi.go

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package device
@@ -18,7 +18,8 @@ import (
 	"sync"
 	"time"
 
-	"golang.zx2c4.com/wireguard/ipc"
+	"github.com/amnezia-vpn/amneziawg-go/device/awg"
+	"github.com/amnezia-vpn/amneziawg-go/ipc"
 )
 
 type IPCError struct {
@@ -97,6 +98,54 @@ func (device *Device) IpcGetOperation(w io.Writer) error {
 			sendf("fwmark=%d", device.net.fwmark)
 		}
 
+		if device.isAWG() {
+			if device.awg.ASecCfg.JunkPacketCount != 0 {
+				sendf("jc=%d", device.awg.ASecCfg.JunkPacketCount)
+			}
+			if device.awg.ASecCfg.JunkPacketMinSize != 0 {
+				sendf("jmin=%d", device.awg.ASecCfg.JunkPacketMinSize)
+			}
+			if device.awg.ASecCfg.JunkPacketMaxSize != 0 {
+				sendf("jmax=%d", device.awg.ASecCfg.JunkPacketMaxSize)
+			}
+			if device.awg.ASecCfg.InitHeaderJunkSize != 0 {
+				sendf("s1=%d", device.awg.ASecCfg.InitHeaderJunkSize)
+			}
+			if device.awg.ASecCfg.ResponseHeaderJunkSize != 0 {
+				sendf("s2=%d", device.awg.ASecCfg.ResponseHeaderJunkSize)
+			}
+			if device.awg.ASecCfg.CookieReplyHeaderJunkSize != 0 {
+				sendf("s3=%d", device.awg.ASecCfg.CookieReplyHeaderJunkSize)
+			}
+			if device.awg.ASecCfg.TransportHeaderJunkSize != 0 {
+				sendf("s4=%d", device.awg.ASecCfg.TransportHeaderJunkSize)
+			}
+			if device.awg.ASecCfg.InitPacketMagicHeader != 0 {
+				sendf("h1=%d", device.awg.ASecCfg.InitPacketMagicHeader)
+			}
+			if device.awg.ASecCfg.ResponsePacketMagicHeader != 0 {
+				sendf("h2=%d", device.awg.ASecCfg.ResponsePacketMagicHeader)
+			}
+			if device.awg.ASecCfg.UnderloadPacketMagicHeader != 0 {
+				sendf("h3=%d", device.awg.ASecCfg.UnderloadPacketMagicHeader)
+			}
+			if device.awg.ASecCfg.TransportPacketMagicHeader != 0 {
+				sendf("h4=%d", device.awg.ASecCfg.TransportPacketMagicHeader)
+			}
+
+			specialJunkIpcFields := device.awg.HandshakeHandler.SpecialJunk.IpcGetFields()
+			for _, field := range specialJunkIpcFields {
+				sendf("%s=%s", field.Key, field.Value)
+			}
+			controlledJunkIpcFields := device.awg.HandshakeHandler.ControlledJunk.IpcGetFields()
+			for _, field := range controlledJunkIpcFields {
+				sendf("%s=%s", field.Key, field.Value)
+			}
+			if device.awg.HandshakeHandler.ITimeout != 0 {
+				sendf("itime=%d", device.awg.HandshakeHandler.ITimeout/time.Second)
+			}
+		}
+
 		for _, peer := range device.peers.keyMap {
 			// Serialize peer state.
 			peer.handshake.mutex.RLock()
@@ -150,17 +199,26 @@ func (device *Device) IpcSetOperation(r io.Reader) (err error) {
 	peer := new(ipcSetPeer)
 	deviceConfig := true
 
+	tempAwg := awg.Protocol{}
 	scanner := bufio.NewScanner(r)
 	for scanner.Scan() {
 		line := scanner.Text()
 		if line == "" {
 			// Blank line means terminate operation.
+			err := device.handlePostConfig(&tempAwg)
+			if err != nil {
+				return err
+			}
 			peer.handlePostConfig()
 			return nil
 		}
 		key, value, ok := strings.Cut(line, "=")
 		if !ok {
-			return ipcErrorf(ipc.IpcErrorProtocol, "failed to parse line %q", line)
+			return ipcErrorf(
+				ipc.IpcErrorProtocol,
+				"failed to parse line %q",
+				line,
+			)
 		}
 
 		if key == "public_key" {
@@ -178,7 +236,7 @@ func (device *Device) IpcSetOperation(r io.Reader) (err error) {
 
 		var err error
 		if deviceConfig {
-			err = device.handleDeviceLine(key, value)
+			err = device.handleDeviceLine(key, value, &tempAwg)
 		} else {
 			err = device.handlePeerLine(peer, key, value)
 		}
@@ -186,6 +244,10 @@ func (device *Device) IpcSetOperation(r io.Reader) (err error) {
 			return err
 		}
 	}
+	err = device.handlePostConfig(&tempAwg)
+	if err != nil {
+		return err
+	}
 	peer.handlePostConfig()
 
 	if err := scanner.Err(); err != nil {
@@ -194,7 +256,7 @@ func (device *Device) IpcSetOperation(r io.Reader) (err error) {
 	return nil
 }
 
-func (device *Device) handleDeviceLine(key, value string) error {
+func (device *Device) handleDeviceLine(key, value string, tempAwg *awg.Protocol) error {
 	switch key {
 	case "private_key":
 		var sk NoisePrivateKey
@@ -235,11 +297,150 @@ func (device *Device) handleDeviceLine(key, value string) error {
 
 	case "replace_peers":
 		if value != "true" {
-			return ipcErrorf(ipc.IpcErrorInvalid, "failed to set replace_peers, invalid value: %v", value)
+			return ipcErrorf(
+				ipc.IpcErrorInvalid,
+				"failed to set replace_peers, invalid value: %v",
+				value,
+			)
 		}
 		device.log.Verbosef("UAPI: Removing all peers")
 		device.RemoveAllPeers()
 
+	case "jc":
+		junkPacketCount, err := strconv.Atoi(value)
+		if err != nil {
+			return ipcErrorf(ipc.IpcErrorInvalid, "parse junk_packet_count %w", err)
+		}
+		device.log.Verbosef("UAPI: Updating junk_packet_count")
+		tempAwg.ASecCfg.JunkPacketCount = junkPacketCount
+		tempAwg.ASecCfg.IsSet = true
+
+	case "jmin":
+		junkPacketMinSize, err := strconv.Atoi(value)
+		if err != nil {
+			return ipcErrorf(ipc.IpcErrorInvalid, "parse junk_packet_min_size %w", err)
+		}
+		device.log.Verbosef("UAPI: Updating junk_packet_min_size")
+		tempAwg.ASecCfg.JunkPacketMinSize = junkPacketMinSize
+		tempAwg.ASecCfg.IsSet = true
+
+	case "jmax":
+		junkPacketMaxSize, err := strconv.Atoi(value)
+		if err != nil {
+			return ipcErrorf(ipc.IpcErrorInvalid, "parse junk_packet_max_size %w", err)
+		}
+		device.log.Verbosef("UAPI: Updating junk_packet_max_size")
+		tempAwg.ASecCfg.JunkPacketMaxSize = junkPacketMaxSize
+		tempAwg.ASecCfg.IsSet = true
+
+	case "s1":
+		initPacketJunkSize, err := strconv.Atoi(value)
+		if err != nil {
+			return ipcErrorf(ipc.IpcErrorInvalid, "parse init_packet_junk_size %w", err)
+		}
+		device.log.Verbosef("UAPI: Updating init_packet_junk_size")
+		tempAwg.ASecCfg.InitHeaderJunkSize = initPacketJunkSize
+		tempAwg.ASecCfg.IsSet = true
+
+	case "s2":
+		responsePacketJunkSize, err := strconv.Atoi(value)
+		if err != nil {
+			return ipcErrorf(ipc.IpcErrorInvalid, "parse response_packet_junk_size %w", err)
+		}
+		device.log.Verbosef("UAPI: Updating response_packet_junk_size")
+		tempAwg.ASecCfg.ResponseHeaderJunkSize = responsePacketJunkSize
+		tempAwg.ASecCfg.IsSet = true
+
+	case "s3":
+		cookieReplyPacketJunkSize, err := strconv.Atoi(value)
+		if err != nil {
+			return ipcErrorf(ipc.IpcErrorInvalid, "parse cookie_reply_packet_junk_size %w", err)
+		}
+		device.log.Verbosef("UAPI: Updating cookie_reply_packet_junk_size")
+		tempAwg.ASecCfg.CookieReplyHeaderJunkSize = cookieReplyPacketJunkSize
+		tempAwg.ASecCfg.IsSet = true
+
+	case "s4":
+		transportPacketJunkSize, err := strconv.Atoi(value)
+		if err != nil {
+			return ipcErrorf(ipc.IpcErrorInvalid, "parse transport_packet_junk_size %w", err)
+		}
+		device.log.Verbosef("UAPI: Updating transport_packet_junk_size")
+		tempAwg.ASecCfg.TransportHeaderJunkSize = transportPacketJunkSize
+		tempAwg.ASecCfg.IsSet = true
+
+	case "h1":
+		initPacketMagicHeader, err := strconv.ParseUint(value, 10, 32)
+		if err != nil {
+			return ipcErrorf(ipc.IpcErrorInvalid, "parse init_packet_magic_header %w", err)
+		}
+		tempAwg.ASecCfg.InitPacketMagicHeader = uint32(initPacketMagicHeader)
+		tempAwg.ASecCfg.IsSet = true
+
+	case "h2":
+		responsePacketMagicHeader, err := strconv.ParseUint(value, 10, 32)
+		if err != nil {
+			return ipcErrorf(ipc.IpcErrorInvalid, "parse response_packet_magic_header %w", err)
+		}
+		tempAwg.ASecCfg.ResponsePacketMagicHeader = uint32(responsePacketMagicHeader)
+		tempAwg.ASecCfg.IsSet = true
+
+	case "h3":
+		underloadPacketMagicHeader, err := strconv.ParseUint(value, 10, 32)
+		if err != nil {
+			return ipcErrorf(ipc.IpcErrorInvalid, "parse underload_packet_magic_header %w", err)
+		}
+		tempAwg.ASecCfg.UnderloadPacketMagicHeader = uint32(underloadPacketMagicHeader)
+		tempAwg.ASecCfg.IsSet = true
+
+	case "h4":
+		transportPacketMagicHeader, err := strconv.ParseUint(value, 10, 32)
+		if err != nil {
+			return ipcErrorf(ipc.IpcErrorInvalid, "parse transport_packet_magic_header %w", err)
+		}
+		tempAwg.ASecCfg.TransportPacketMagicHeader = uint32(transportPacketMagicHeader)
+		tempAwg.ASecCfg.IsSet = true
+	case "i1", "i2", "i3", "i4", "i5":
+		if len(value) == 0 {
+			device.log.Verbosef("UAPI: received empty %s", key)
+			return nil
+		}
+
+		generator, err := awg.Parse(key, value)
+		if err != nil {
+			return ipcErrorf(ipc.IpcErrorInvalid, "invalid %s: %w", key, err)
+		}
+		device.log.Verbosef("UAPI: Updating %s", key)
+		tempAwg.HandshakeHandler.SpecialJunk.AppendGenerator(generator)
+		tempAwg.HandshakeHandler.IsSet = true
+	case "j1", "j2", "j3":
+		if len(value) == 0 {
+			device.log.Verbosef("UAPI: received empty %s", key)
+			return nil
+		}
+
+		generator, err := awg.Parse(key, value)
+		if err != nil {
+			return ipcErrorf(ipc.IpcErrorInvalid, "invalid %s: %w", key, err)
+		}
+		device.log.Verbosef("UAPI: Updating %s", key)
+
+		tempAwg.HandshakeHandler.ControlledJunk.AppendGenerator(generator)
+		tempAwg.HandshakeHandler.IsSet = true
+	case "itime":
+		if len(value) == 0 {
+			device.log.Verbosef("UAPI: received empty itime")
+			return nil
+		}
+
+		itime, err := strconv.ParseInt(value, 10, 64)
+		if err != nil {
+			return ipcErrorf(ipc.IpcErrorInvalid, "parse itime %w", err)
+		}
+		device.log.Verbosef("UAPI: Updating itime")
+
+		tempAwg.HandshakeHandler.ITimeout = time.Duration(itime) * time.Second
+		tempAwg.HandshakeHandler.IsSet = true
 	default:
 		return ipcErrorf(ipc.IpcErrorInvalid, "invalid UAPI device key: %v", key)
 	}
@@ -271,7 +472,10 @@ func (peer *ipcSetPeer) handlePostConfig() {
 	}
 }
 
-func (device *Device) handlePublicKeyLine(peer *ipcSetPeer, value string) error {
+func (device *Device) handlePublicKeyLine(
+	peer *ipcSetPeer,
+	value string,
+) error {
 	// Load/create the peer we are configuring.
 	var publicKey NoisePublicKey
 	err := publicKey.FromHex(value)
@@ -301,12 +505,19 @@ func (device *Device) handlePublicKeyLine(peer *ipcSetPeer, value string) error
 	return nil
 }
 
-func (device *Device) handlePeerLine(peer *ipcSetPeer, key, value string) error {
+func (device *Device) handlePeerLine(
+	peer *ipcSetPeer,
+	key, value string,
+) error {
 	switch key {
 	case "update_only":
 		// allow disabling of creation
 		if value != "true" {
-			return ipcErrorf(ipc.IpcErrorInvalid, "failed to set update only, invalid value: %v", value)
+			return ipcErrorf(
+				ipc.IpcErrorInvalid,
+				"failed to set update only, invalid value: %v",
+				value,
+			)
 		}
 		if peer.created && !peer.dummy {
 			device.RemovePeer(peer.handshake.remoteStatic)
@@ -352,7 +563,11 @@ func (device *Device) handlePeerLine(peer *ipcSetPeer, key, value string) error
 
 		secs, err := strconv.ParseUint(value, 10, 16)
 		if err != nil {
-			return ipcErrorf(ipc.IpcErrorInvalid, "failed to set persistent keepalive interval: %w", err)
+			return ipcErrorf(
+				ipc.IpcErrorInvalid,
+				"failed to set persistent keepalive interval: %w",
+				err,
+			)
 		}
 
 		old := peer.persistentKeepaliveInterval.Swap(uint32(secs))
@@ -363,7 +578,11 @@ func (device *Device) handlePeerLine(peer *ipcSetPeer, key, value string) error
 	case "replace_allowed_ips":
 		device.log.Verbosef("%v - UAPI: Removing all allowedips", peer.Peer)
 		if value != "true" {
-			return ipcErrorf(ipc.IpcErrorInvalid, "failed to replace allowedips, invalid value: %v", value)
+			return ipcErrorf(
+				ipc.IpcErrorInvalid,
+				"failed to replace allowedips, invalid value: %v",
+				value,
+			)
 		}
 		if peer.dummy {
 			return nil
@@ -371,7 +590,14 @@ func (device *Device) handlePeerLine(peer *ipcSetPeer, key, value string) error
 		device.allowedips.RemoveByPeer(peer.Peer)
 
 	case "allowed_ip":
-		device.log.Verbosef("%v - UAPI: Adding allowedip", peer.Peer)
+		add := true
+		verb := "Adding"
+		if len(value) > 0 && value[0] == '-' {
+			add = false
+			verb = "Removing"
+			value = value[1:]
+		}
+		device.log.Verbosef("%v - UAPI: %s allowedip", peer.Peer, verb)
 		prefix, err := netip.ParsePrefix(value)
 		if err != nil {
 			return ipcErrorf(ipc.IpcErrorInvalid, "failed to set allowed ip: %w", err)
@@ -379,7 +605,11 @@ func (device *Device) handlePeerLine(peer *ipcSetPeer, key, value string) error
 		if peer.dummy {
 			return nil
 		}
-		device.allowedips.Insert(prefix, peer.Peer)
+		if add {
+			device.allowedips.Insert(prefix, peer.Peer)
+		} else {
+			device.allowedips.Remove(prefix, peer.Peer)
+		}
 
 	case "protocol_version":
 		if value != "1" {
@@ -431,7 +661,11 @@ func (device *Device) IpcHandle(socket net.Conn) {
 				return
 			}
 			if nextByte != '\n' {
-				err = ipcErrorf(ipc.IpcErrorInvalid, "trailing character in UAPI get: %q", nextByte)
+				err = ipcErrorf(
+					ipc.IpcErrorInvalid,
+					"trailing character in UAPI get: %q",
+					nextByte,
+				)
 				break
 			}
 			err = device.IpcGetOperation(buffered.Writer)

format_test.go

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 package main
 

go.mod

@@ -1,16 +1,23 @@
-module golang.zx2c4.com/wireguard
+module github.com/amnezia-vpn/amneziawg-go
 
-go 1.20
+go 1.24.4
 
 require (
-	golang.org/x/crypto v0.13.0
-	golang.org/x/net v0.15.0
-	golang.org/x/sys v0.12.0
+	github.com/stretchr/testify v1.10.0
+	github.com/tevino/abool v1.2.0
+	github.com/tevino/abool/v2 v2.1.0
+	go.uber.org/atomic v1.11.0
+	golang.org/x/crypto v0.39.0
+	golang.org/x/net v0.41.0
+	golang.org/x/sys v0.33.0
 	golang.zx2c4.com/wintun v0.0.0-20230126152724-0fa3db229ce2
-	gvisor.dev/gvisor v0.0.0-20230927004350-cbd86285d259
+	gvisor.dev/gvisor v0.0.0-20231202080848-1f7806d17489
 )
 
 require (
-	github.com/google/btree v1.0.1 // indirect
-	golang.org/x/time v0.0.0-20220210224613-90d013bbcef8 // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/google/btree v1.1.3 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	golang.org/x/time v0.9.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -1,14 +1,40 @@
-github.com/google/btree v1.0.1 h1:gK4Kx5IaGY9CD5sPJ36FHiBJ6ZXl0kilRiiCj+jdYp4=
-github.com/google/btree v1.0.1/go.mod h1:xXMiIv4Fb/0kKde4SpL7qlzvu5cMJDRkFDxJfI9uaxA=
-golang.org/x/crypto v0.13.0 h1:mvySKfSWJ+UKUii46M40LOvyWfN0s2U+46/jDd0e6Ck=
-golang.org/x/crypto v0.13.0/go.mod h1:y6Z2r+Rw4iayiXXAIxJIDAJ1zMW4yaTpebo8fPOliYc=
-golang.org/x/net v0.15.0 h1:ugBLEUaxABaB5AJqW9enI0ACdci2RUd4eP51NTBvuJ8=
-golang.org/x/net v0.15.0/go.mod h1:idbUs1IY1+zTqbi8yxTbhexhEEk5ur9LInksu6HrEpk=
-golang.org/x/sys v0.12.0 h1:CM0HF96J0hcLAwsHPJZjfdNzs0gftsLfgKt57wWHJ0o=
-golang.org/x/sys v0.12.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/time v0.0.0-20220210224613-90d013bbcef8 h1:vVKdlvoWBphwdxWKrFZEuM0kGgGLxUOYcY4U/2Vjg44=
-golang.org/x/time v0.0.0-20220210224613-90d013bbcef8/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/google/btree v1.1.3 h1:CVpQJjYgC4VbzxeGVHfvZrv1ctoYCAI8vbl07Fcxlyg=
+github.com/google/btree v1.1.3/go.mod h1:qOPhT0dTNdNzV6Z/lhRX0YXUafgPLFUh+gZMl761Gm4=
+github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
+github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/testify v1.10.0 h1:Xv5erBjTwe/5IxqUQTdXv5kgmIvbHo3QQyRwhJsOfJA=
+github.com/stretchr/testify v1.10.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
+github.com/tevino/abool v1.2.0 h1:heAkClL8H6w+mK5md9dzsuohKeXHUpY7Vw0ZCKW+huA=
+github.com/tevino/abool v1.2.0/go.mod h1:qc66Pna1RiIsPa7O4Egxxs9OqkuxDX55zznh9K07Tzg=
+github.com/tevino/abool/v2 v2.1.0 h1:7w+Vf9f/5gmKT4m4qkayb33/92M+Um45F2BkHOR+L/c=
+github.com/tevino/abool/v2 v2.1.0/go.mod h1:+Lmlqk6bHDWHqN1cbxqhwEAwMPXgc8I1SDEamtseuXY=
+go.uber.org/atomic v1.11.0 h1:ZvwS0R+56ePWxUNi+Atn9dWONBPp/AUETXlHW0DxSjE=
+go.uber.org/atomic v1.11.0/go.mod h1:LUxbIzbOniOlMKjJjyPfpl4v+PKK2cNJn91OQbhoJI0=
+golang.org/x/crypto v0.39.0 h1:SHs+kF4LP+f+p14esP5jAoDpHU8Gu/v9lFRK6IT5imM=
+golang.org/x/crypto v0.39.0/go.mod h1:L+Xg3Wf6HoL4Bn4238Z6ft6KfEpN0tJGo53AAPC632U=
+golang.org/x/mod v0.13.0 h1:I/DsJXRlw/8l/0c24sM9yb0T4z9liZTduXvdAWYiysY=
+golang.org/x/mod v0.21.0 h1:vvrHzRwRfVKSiLrG+d4FMl/Qi4ukBCE6kZlTUkDYRT0=
+golang.org/x/mod v0.21.0/go.mod h1:6SkKJ3Xj0I0BrPOZoBy3bdMptDDU9oJrpohJ3eWZ1fY=
+golang.org/x/net v0.41.0 h1:vBTly1HeNPEn3wtREYfy4GZ/NECgw2Cnl+nK6Nz3uvw=
+golang.org/x/net v0.41.0/go.mod h1:B/K4NNqkfmg07DQYrbwvSluqCJOOXwUjeb/5lOisjbA=
+golang.org/x/sys v0.33.0 h1:q3i8TbbEz+JRD9ywIRlyRAQbM0qF7hu24q3teo2hbuw=
+golang.org/x/sys v0.33.0/go.mod h1:BJP2sWEmIv4KK5OTEluFJCKSidICx8ciO85XgH3Ak8k=
+golang.org/x/time v0.9.0 h1:EsRrnYcQiGH+5FfbgvV4AP7qEZstoyrHB0DzarOQ4ZY=
+golang.org/x/time v0.9.0/go.mod h1:3BpzKBy/shNhVucY/MWOyx10tF3SFh9QdLuxbVysPQM=
 golang.zx2c4.com/wintun v0.0.0-20230126152724-0fa3db229ce2 h1:B82qJJgjvYKsXS9jeunTOisW56dUokqW/FOteYJJ/yg=
 golang.zx2c4.com/wintun v0.0.0-20230126152724-0fa3db229ce2/go.mod h1:deeaetjYA+DHMHg+sMSMI58GrEteJUUzzw7en6TJQcI=
-gvisor.dev/gvisor v0.0.0-20230927004350-cbd86285d259 h1:TbRPT0HtzFP3Cno1zZo7yPzEEnfu8EjLfl6IU9VfqkQ=
-gvisor.dev/gvisor v0.0.0-20230927004350-cbd86285d259/go.mod h1:AVgIgHMwK63XvmAzWG9vLQ41YnVHN0du0tEC46fI7yY=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gvisor.dev/gvisor v0.0.0-20231202080848-1f7806d17489 h1:ze1vwAdliUAr68RQ5NtufWaXaOg8WUO2OACzEV+TNdE=
+gvisor.dev/gvisor v0.0.0-20231202080848-1f7806d17489/go.mod h1:10sU+Uh5KKNv1+2x2A0Gvzt8FjD3ASIhorV3YsauXhk=
+gvisor.dev/gvisor v0.0.0-20250428193742-2d800c3129d5 h1:sfK5nHuG7lRFZ2FdTT3RimOqWBg8IrVm+/Vko1FVOsk=
+gvisor.dev/gvisor v0.0.0-20250428193742-2d800c3129d5/go.mod h1:3r5CMtNQMKIvBlrmM9xWUNamjKBYPOWyXOjmg5Kts3g=
+gvisor.dev/gvisor v0.0.0-20250606233247-e3c4c4cad86f h1:zmc4cHEcCudRt2O8VsCW7nYLfAsbVY2i910/DAop1TM=
+gvisor.dev/gvisor v0.0.0-20250606233247-e3c4c4cad86f/go.mod h1:3r5CMtNQMKIvBlrmM9xWUNamjKBYPOWyXOjmg5Kts3g=

ipc/namedpipe/namedpipe_test.go

@@ -20,8 +20,8 @@ import (
 	"testing"
 	"time"
 
+	"github.com/amnezia-vpn/amneziawg-go/ipc/namedpipe"
 	"golang.org/x/sys/windows"
-	"golang.zx2c4.com/wireguard/ipc/namedpipe"
 )
 
 func randomPipePath() string {

ipc/uapi_bsd.go

@@ -2,7 +2,7 @@
 
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package ipc

ipc/uapi_linux.go

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package ipc
@@ -9,8 +9,8 @@ import (
 	"net"
 	"os"
 
+	"github.com/amnezia-vpn/amneziawg-go/rwcancel"
 	"golang.org/x/sys/unix"
-	"golang.zx2c4.com/wireguard/rwcancel"
 )
 
 type UAPIListener struct {

ipc/uapi_unix.go

@@ -2,7 +2,7 @@
 
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package ipc
@@ -26,7 +26,7 @@ const (
 
 // socketDirectory is variable because it is modified by a linker
 // flag in wireguard-android.
-var socketDirectory = "/var/run/wireguard"
+var socketDirectory = "/var/run/amneziawg"
 
 func sockPath(iface string) string {
 	return fmt.Sprintf("%s/%s.sock", socketDirectory, iface)

ipc/uapi_wasm.go

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package ipc

ipc/uapi_windows.go

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package ipc
@@ -8,8 +8,8 @@ package ipc
 import (
 	"net"
 
+	"github.com/amnezia-vpn/amneziawg-go/ipc/namedpipe"
 	"golang.org/x/sys/windows"
-	"golang.zx2c4.com/wireguard/ipc/namedpipe"
 )
 
 // TODO: replace these with actual standard windows error numbers from the win package
@@ -62,7 +62,7 @@ func init() {
 func UAPIListen(name string) (net.Listener, error) {
 	listener, err := (&namedpipe.ListenConfig{
 		SecurityDescriptor: UAPISecurityDescriptor,
-	}).Listen(`\\.\pipe\ProtectedPrefix\Administrators\WireGuard\` + name)
+	}).Listen(`\\.\pipe\ProtectedPrefix\Administrators\AmneziaWG\` + name)
 	if err != nil {
 		return nil, err
 	}

main.go

@@ -2,7 +2,7 @@
 
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package main
@@ -14,11 +14,11 @@ import (
 	"runtime"
 	"strconv"
 
+	"github.com/amnezia-vpn/amneziawg-go/conn"
+	"github.com/amnezia-vpn/amneziawg-go/device"
+	"github.com/amnezia-vpn/amneziawg-go/ipc"
+	"github.com/amnezia-vpn/amneziawg-go/tun"
 	"golang.org/x/sys/unix"
-	"golang.zx2c4.com/wireguard/conn"
-	"golang.zx2c4.com/wireguard/device"
-	"golang.zx2c4.com/wireguard/ipc"
-	"golang.zx2c4.com/wireguard/tun"
 )
 
 const (
@@ -46,20 +46,20 @@ func warning() {
 		return
 	}
 
-	fmt.Fprintln(os.Stderr, "┌──────────────────────────────────────────────────────┐")
-	fmt.Fprintln(os.Stderr, "│                                                      │")
-	fmt.Fprintln(os.Stderr, "│   Running wireguard-go is not required because this  │")
-	fmt.Fprintln(os.Stderr, "│   kernel has first class support for WireGuard. For  │")
-	fmt.Fprintln(os.Stderr, "│   information on installing the kernel module,       │")
-	fmt.Fprintln(os.Stderr, "│   please visit:                                      │")
-	fmt.Fprintln(os.Stderr, "│         https://www.wireguard.com/install/           │")
-	fmt.Fprintln(os.Stderr, "│                                                      │")
-	fmt.Fprintln(os.Stderr, "└──────────────────────────────────────────────────────┘")
+	fmt.Fprintln(os.Stderr, "┌──────────────────────────────────────────────────────────────┐")
+	fmt.Fprintln(os.Stderr, "│                                                              │")
+	fmt.Fprintln(os.Stderr, "│       Running amneziawg-go is not required because this      │")
+	fmt.Fprintln(os.Stderr, "│       kernel has first class support for AmneziaWG. For      │")
+	fmt.Fprintln(os.Stderr, "│       information on installing the kernel module,           │")
+	fmt.Fprintln(os.Stderr, "│       please visit:                                          │")
+	fmt.Fprintln(os.Stderr, "| https://github.com/amnezia-vpn/amneziawg-linux-kernel-module │")
+	fmt.Fprintln(os.Stderr, "│                                                              │")
+	fmt.Fprintln(os.Stderr, "└──────────────────────────────────────────────────────────────┘")
 }
 
 func main() {
 	if len(os.Args) == 2 && os.Args[1] == "--version" {
-		fmt.Printf("wireguard-go v%s\n\nUserspace WireGuard daemon for %s-%s.\nInformation available at https://www.wireguard.com.\nCopyright (C) Jason A. Donenfeld <Jason@zx2c4.com>.\n", Version, runtime.GOOS, runtime.GOARCH)
+		fmt.Printf("amneziawg-go %s\n\nUserspace AmneziaWG daemon for %s-%s.\nInformation available at https://amnezia.org\n", Version, runtime.GOOS, runtime.GOARCH)
 		return
 	}
 
@@ -145,7 +145,7 @@ func main() {
 		fmt.Sprintf("(%s) ", interfaceName),
 	)
 
-	logger.Verbosef("Starting wireguard-go version %s", Version)
+	logger.Verbosef("Starting amneziawg-go version %s", Version)
 
 	if err != nil {
 		logger.Errorf("Failed to create TUN device: %v", err)

main_windows.go

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package main
@@ -12,11 +12,11 @@ import (
 
 	"golang.org/x/sys/windows"
 
-	"golang.zx2c4.com/wireguard/conn"
-	"golang.zx2c4.com/wireguard/device"
-	"golang.zx2c4.com/wireguard/ipc"
+	"github.com/amnezia-vpn/amneziawg-go/conn"
+	"github.com/amnezia-vpn/amneziawg-go/device"
+	"github.com/amnezia-vpn/amneziawg-go/ipc"
 
-	"golang.zx2c4.com/wireguard/tun"
+	"github.com/amnezia-vpn/amneziawg-go/tun"
 )
 
 const (
@@ -30,13 +30,13 @@ func main() {
 	}
 	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.")
+	fmt.Fprintln(os.Stderr, "Warning: this is a test program for Windows, mainly used for debugging this Go package. For a real AmneziaWG for Windows client, please visit: https://amnezia.org")
 
 	logger := device.NewLogger(
 		device.LogLevelVerbose,
 		fmt.Sprintf("(%s) ", interfaceName),
 	)
-	logger.Verbosef("Starting wireguard-go version %s", Version)
+	logger.Verbosef("Starting amneziawg-go version %s", Version)
 
 	tun, err := tun.CreateTUN(interfaceName, 0)
 	if err == nil {

ratelimiter/ratelimiter.go

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package ratelimiter

ratelimiter/ratelimiter_test.go

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package ratelimiter

replay/replay.go

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 // Package replay implements an efficient anti-replay algorithm as specified in RFC 6479.

replay/replay_test.go

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package replay

rwcancel/rwcancel.go

@@ -2,7 +2,7 @@
 
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 // Package rwcancel implements cancelable read/write operations on
@@ -64,7 +64,7 @@ func (rw *RWCancel) ReadyRead() bool {
 
 func (rw *RWCancel) ReadyWrite() bool {
 	closeFd := int32(rw.closingReader.Fd())
-	pollFds := []unix.PollFd{{Fd: int32(rw.fd), Events: unix.POLLOUT}, {Fd: closeFd, Events: unix.POLLOUT}}
+	pollFds := []unix.PollFd{{Fd: int32(rw.fd), Events: unix.POLLOUT}, {Fd: closeFd, Events: unix.POLLIN}}
 	var err error
 	for {
 		_, err = unix.Poll(pollFds, -1)

tai64n/tai64n.go

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package tai64n

tai64n/tai64n_test.go

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package tai64n

tun/alignment_windows_test.go

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package tun

tun/checksum.go

@@ -1,102 +1,86 @@
 package tun
 
-import "encoding/binary"
+import (
+	"encoding/binary"
+	"math/bits"
+)
 
 // TODO: Explore SIMD and/or other assembly optimizations.
-// TODO: Test native endian loads. See RFC 1071 section 2 part B.
 func checksumNoFold(b []byte, initial uint64) uint64 {
-	ac := initial
+	tmp := make([]byte, 8)
+	binary.NativeEndian.PutUint64(tmp, initial)
+	ac := binary.BigEndian.Uint64(tmp)
+	var carry uint64
 
 	for len(b) >= 128 {
-		ac += uint64(binary.BigEndian.Uint32(b[:4]))
-		ac += uint64(binary.BigEndian.Uint32(b[4:8]))
-		ac += uint64(binary.BigEndian.Uint32(b[8:12]))
-		ac += uint64(binary.BigEndian.Uint32(b[12:16]))
-		ac += uint64(binary.BigEndian.Uint32(b[16:20]))
-		ac += uint64(binary.BigEndian.Uint32(b[20:24]))
-		ac += uint64(binary.BigEndian.Uint32(b[24:28]))
-		ac += uint64(binary.BigEndian.Uint32(b[28:32]))
-		ac += uint64(binary.BigEndian.Uint32(b[32:36]))
-		ac += uint64(binary.BigEndian.Uint32(b[36:40]))
-		ac += uint64(binary.BigEndian.Uint32(b[40:44]))
-		ac += uint64(binary.BigEndian.Uint32(b[44:48]))
-		ac += uint64(binary.BigEndian.Uint32(b[48:52]))
-		ac += uint64(binary.BigEndian.Uint32(b[52:56]))
-		ac += uint64(binary.BigEndian.Uint32(b[56:60]))
-		ac += uint64(binary.BigEndian.Uint32(b[60:64]))
-		ac += uint64(binary.BigEndian.Uint32(b[64:68]))
-		ac += uint64(binary.BigEndian.Uint32(b[68:72]))
-		ac += uint64(binary.BigEndian.Uint32(b[72:76]))
-		ac += uint64(binary.BigEndian.Uint32(b[76:80]))
-		ac += uint64(binary.BigEndian.Uint32(b[80:84]))
-		ac += uint64(binary.BigEndian.Uint32(b[84:88]))
-		ac += uint64(binary.BigEndian.Uint32(b[88:92]))
-		ac += uint64(binary.BigEndian.Uint32(b[92:96]))
-		ac += uint64(binary.BigEndian.Uint32(b[96:100]))
-		ac += uint64(binary.BigEndian.Uint32(b[100:104]))
-		ac += uint64(binary.BigEndian.Uint32(b[104:108]))
-		ac += uint64(binary.BigEndian.Uint32(b[108:112]))
-		ac += uint64(binary.BigEndian.Uint32(b[112:116]))
-		ac += uint64(binary.BigEndian.Uint32(b[116:120]))
-		ac += uint64(binary.BigEndian.Uint32(b[120:124]))
-		ac += uint64(binary.BigEndian.Uint32(b[124:128]))
+		ac, carry = bits.Add64(ac, binary.NativeEndian.Uint64(b[:8]), 0)
+		ac, carry = bits.Add64(ac, binary.NativeEndian.Uint64(b[8:16]), carry)
+		ac, carry = bits.Add64(ac, binary.NativeEndian.Uint64(b[16:24]), carry)
+		ac, carry = bits.Add64(ac, binary.NativeEndian.Uint64(b[24:32]), carry)
+		ac, carry = bits.Add64(ac, binary.NativeEndian.Uint64(b[32:40]), carry)
+		ac, carry = bits.Add64(ac, binary.NativeEndian.Uint64(b[40:48]), carry)
+		ac, carry = bits.Add64(ac, binary.NativeEndian.Uint64(b[48:56]), carry)
+		ac, carry = bits.Add64(ac, binary.NativeEndian.Uint64(b[56:64]), carry)
+		ac, carry = bits.Add64(ac, binary.NativeEndian.Uint64(b[64:72]), carry)
+		ac, carry = bits.Add64(ac, binary.NativeEndian.Uint64(b[72:80]), carry)
+		ac, carry = bits.Add64(ac, binary.NativeEndian.Uint64(b[80:88]), carry)
+		ac, carry = bits.Add64(ac, binary.NativeEndian.Uint64(b[88:96]), carry)
+		ac, carry = bits.Add64(ac, binary.NativeEndian.Uint64(b[96:104]), carry)
+		ac, carry = bits.Add64(ac, binary.NativeEndian.Uint64(b[104:112]), carry)
+		ac, carry = bits.Add64(ac, binary.NativeEndian.Uint64(b[112:120]), carry)
+		ac, carry = bits.Add64(ac, binary.NativeEndian.Uint64(b[120:128]), carry)
+		ac += carry
 		b = b[128:]
 	}
 	if len(b) >= 64 {
-		ac += uint64(binary.BigEndian.Uint32(b[:4]))
-		ac += uint64(binary.BigEndian.Uint32(b[4:8]))
-		ac += uint64(binary.BigEndian.Uint32(b[8:12]))
-		ac += uint64(binary.BigEndian.Uint32(b[12:16]))
-		ac += uint64(binary.BigEndian.Uint32(b[16:20]))
-		ac += uint64(binary.BigEndian.Uint32(b[20:24]))
-		ac += uint64(binary.BigEndian.Uint32(b[24:28]))
-		ac += uint64(binary.BigEndian.Uint32(b[28:32]))
-		ac += uint64(binary.BigEndian.Uint32(b[32:36]))
-		ac += uint64(binary.BigEndian.Uint32(b[36:40]))
-		ac += uint64(binary.BigEndian.Uint32(b[40:44]))
-		ac += uint64(binary.BigEndian.Uint32(b[44:48]))
-		ac += uint64(binary.BigEndian.Uint32(b[48:52]))
-		ac += uint64(binary.BigEndian.Uint32(b[52:56]))
-		ac += uint64(binary.BigEndian.Uint32(b[56:60]))
-		ac += uint64(binary.BigEndian.Uint32(b[60:64]))
+		ac, carry = bits.Add64(ac, binary.NativeEndian.Uint64(b[:8]), 0)
+		ac, carry = bits.Add64(ac, binary.NativeEndian.Uint64(b[8:16]), carry)
+		ac, carry = bits.Add64(ac, binary.NativeEndian.Uint64(b[16:24]), carry)
+		ac, carry = bits.Add64(ac, binary.NativeEndian.Uint64(b[24:32]), carry)
+		ac, carry = bits.Add64(ac, binary.NativeEndian.Uint64(b[32:40]), carry)
+		ac, carry = bits.Add64(ac, binary.NativeEndian.Uint64(b[40:48]), carry)
+		ac, carry = bits.Add64(ac, binary.NativeEndian.Uint64(b[48:56]), carry)
+		ac, carry = bits.Add64(ac, binary.NativeEndian.Uint64(b[56:64]), carry)
+		ac += carry
 		b = b[64:]
 	}
 	if len(b) >= 32 {
-		ac += uint64(binary.BigEndian.Uint32(b[:4]))
-		ac += uint64(binary.BigEndian.Uint32(b[4:8]))
-		ac += uint64(binary.BigEndian.Uint32(b[8:12]))
-		ac += uint64(binary.BigEndian.Uint32(b[12:16]))
-		ac += uint64(binary.BigEndian.Uint32(b[16:20]))
-		ac += uint64(binary.BigEndian.Uint32(b[20:24]))
-		ac += uint64(binary.BigEndian.Uint32(b[24:28]))
-		ac += uint64(binary.BigEndian.Uint32(b[28:32]))
+		ac, carry = bits.Add64(ac, binary.NativeEndian.Uint64(b[:8]), 0)
+		ac, carry = bits.Add64(ac, binary.NativeEndian.Uint64(b[8:16]), carry)
+		ac, carry = bits.Add64(ac, binary.NativeEndian.Uint64(b[16:24]), carry)
+		ac, carry = bits.Add64(ac, binary.NativeEndian.Uint64(b[24:32]), carry)
+		ac += carry
 		b = b[32:]
 	}
 	if len(b) >= 16 {
-		ac += uint64(binary.BigEndian.Uint32(b[:4]))
-		ac += uint64(binary.BigEndian.Uint32(b[4:8]))
-		ac += uint64(binary.BigEndian.Uint32(b[8:12]))
-		ac += uint64(binary.BigEndian.Uint32(b[12:16]))
+		ac, carry = bits.Add64(ac, binary.NativeEndian.Uint64(b[:8]), 0)
+		ac, carry = bits.Add64(ac, binary.NativeEndian.Uint64(b[8:16]), carry)
+		ac += carry
 		b = b[16:]
 	}
 	if len(b) >= 8 {
-		ac += uint64(binary.BigEndian.Uint32(b[:4]))
-		ac += uint64(binary.BigEndian.Uint32(b[4:8]))
+		ac, carry = bits.Add64(ac, binary.NativeEndian.Uint64(b[:8]), 0)
+		ac += carry
 		b = b[8:]
 	}
 	if len(b) >= 4 {
-		ac += uint64(binary.BigEndian.Uint32(b))
+		ac, carry = bits.Add64(ac, uint64(binary.NativeEndian.Uint32(b[:4])), 0)
+		ac += carry
 		b = b[4:]
 	}
 	if len(b) >= 2 {
-		ac += uint64(binary.BigEndian.Uint16(b))
+		ac, carry = bits.Add64(ac, uint64(binary.NativeEndian.Uint16(b[:2])), 0)
+		ac += carry
 		b = b[2:]
 	}
 	if len(b) == 1 {
-		ac += uint64(b[0]) << 8
+		tmp := binary.NativeEndian.Uint16([]byte{b[0], 0})
+		ac, carry = bits.Add64(ac, uint64(tmp), 0)
+		ac += carry
 	}
 
-	return ac
+	binary.NativeEndian.PutUint64(tmp, ac)
+	return binary.BigEndian.Uint64(tmp)
 }
 
 func checksum(b []byte, initial uint64) uint16 {

tun/checksum_test.go

@@ -1,11 +1,74 @@
 package tun
 
 import (
+	"encoding/binary"
 	"fmt"
 	"math/rand"
 	"testing"
+
+	"golang.org/x/sys/unix"
 )
 
+func checksumRef(b []byte, initial uint16) uint16 {
+	ac := uint64(initial)
+
+	for len(b) >= 2 {
+		ac += uint64(binary.BigEndian.Uint16(b))
+		b = b[2:]
+	}
+	if len(b) == 1 {
+		ac += uint64(b[0]) << 8
+	}
+
+	for (ac >> 16) > 0 {
+		ac = (ac >> 16) + (ac & 0xffff)
+	}
+	return uint16(ac)
+}
+
+func pseudoHeaderChecksumRefNoFold(protocol uint8, srcAddr, dstAddr []byte, totalLen uint16) uint16 {
+	sum := checksumRef(srcAddr, 0)
+	sum = checksumRef(dstAddr, sum)
+	sum = checksumRef([]byte{0, protocol}, sum)
+	tmp := make([]byte, 2)
+	binary.BigEndian.PutUint16(tmp, totalLen)
+	return checksumRef(tmp, sum)
+}
+
+func TestChecksum(t *testing.T) {
+	for length := 0; length <= 9001; length++ {
+		buf := make([]byte, length)
+		rng := rand.New(rand.NewSource(1))
+		rng.Read(buf)
+		csum := checksum(buf, 0x1234)
+		csumRef := checksumRef(buf, 0x1234)
+		if csum != csumRef {
+			t.Error("Expected checksum", csumRef, "got", csum)
+		}
+	}
+}
+
+func TestPseudoHeaderChecksum(t *testing.T) {
+	for _, addrLen := range []int{4, 16} {
+		for length := 0; length <= 9001; length++ {
+			srcAddr := make([]byte, addrLen)
+			dstAddr := make([]byte, addrLen)
+			buf := make([]byte, length)
+			rng := rand.New(rand.NewSource(1))
+			rng.Read(srcAddr)
+			rng.Read(dstAddr)
+			rng.Read(buf)
+			phSum := pseudoHeaderChecksumNoFold(unix.IPPROTO_TCP, srcAddr, dstAddr, uint16(length))
+			csum := checksum(buf, phSum)
+			phSumRef := pseudoHeaderChecksumRefNoFold(unix.IPPROTO_TCP, srcAddr, dstAddr, uint16(length))
+			csumRef := checksumRef(buf, phSumRef)
+			if csum != csumRef {
+				t.Error("Expected checksumRef", csumRef, "got", csum)
+			}
+		}
+	}
+}
+
 func BenchmarkChecksum(b *testing.B) {
 	lengths := []int{
 		64,

tun/netstack/examples/http_client.go

@@ -2,7 +2,7 @@
 
 /* SPDX-License-Identifier: MIT
  *
- * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
  */
 
 package main
@@ -13,9 +13,9 @@ import (
 	"net/http"
 	"net/netip"
 
-	"golang.zx2c4.com/wireguard/conn"
-	"golang.zx2c4.com/wireguard/device"
-	"golang.zx2c4.com/wireguard/tun/netstack"
+	"github.com/amnezia-vpn/amneziawg-go/conn"
+	"github.com/amnezia-vpn/amneziawg-go/device"
+	"github.com/amnezia-vpn/amneziawg-go/tun/netstack"
 )
 
 func main() {