diff options
Diffstat (limited to 'app/tools/libwg-go/src')
3 files changed, 238 insertions, 0 deletions
diff --git a/app/tools/libwg-go/src/git.zx2c4.com/wireguard-go/api-android.go b/app/tools/libwg-go/src/git.zx2c4.com/wireguard-go/api-android.go new file mode 100644 index 00000000..24a0eaec --- /dev/null +++ b/app/tools/libwg-go/src/git.zx2c4.com/wireguard-go/api-android.go @@ -0,0 +1,162 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later + * + * Copyright (C) 2017-2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved. + */ + +package main + +// #cgo LDFLAGS: -llog +// #include <android/log.h> +import "C" + +import ( + "bufio" + "git.zx2c4.com/wireguard-go/tun" + "golang.org/x/sys/unix" + "io/ioutil" + "log" + "math" + "os" + "os/signal" + "runtime" + "strings" + "unsafe" +) + +type AndroidLogger struct { + level C.int + interfaceName string +} + +func (l AndroidLogger) Write(p []byte) (int, error) { + C.__android_log_write(l.level, C.CString("WireGuard/GoBackend/"+l.interfaceName), C.CString(string(p))) + return len(p), nil +} + +var tunnelHandles map[int32]*Device + +func init() { + tunnelHandles = make(map[int32]*Device) + signals := make(chan os.Signal) + signal.Notify(signals, unix.SIGUSR2) + go func() { + buf := make([]byte, os.Getpagesize()) + for { + select { + case <-signals: + n := runtime.Stack(buf, true) + buf[n] = 0 + C.__android_log_write(C.ANDROID_LOG_ERROR, C.CString("WireGuard/GoBackend/Stacktrace"), (*_Ctype_char)(unsafe.Pointer(&buf[0]))) + } + } + }() +} + +//export wgTurnOn +func wgTurnOn(ifnameRef string, tun_fd int32, settings string) int32 { + interfaceName := string([]byte(ifnameRef)) + + logger := &Logger{ + Debug: log.New(&AndroidLogger{level: C.ANDROID_LOG_DEBUG, interfaceName: interfaceName}, "", 0), + Info: log.New(&AndroidLogger{level: C.ANDROID_LOG_INFO, interfaceName: interfaceName}, "", 0), + Error: log.New(&AndroidLogger{level: C.ANDROID_LOG_ERROR, interfaceName: interfaceName}, "", 0), + } + + logger.Debug.Println("Debug log enabled") + + tun, name, err := tun.CreateTUNFromFD(int(tun_fd)) + if err != nil { + unix.Close(int(tun_fd)) + logger.Error.Println(err) + return -1 + } + + logger.Info.Println("Attaching to interface", name) + device := NewDevice(tun, logger) + + logger.Debug.Println("Interface has MTU", device.tun.mtu) + + bufferedSettings := bufio.NewReadWriter(bufio.NewReader(strings.NewReader(settings)), bufio.NewWriter(ioutil.Discard)) + setError := ipcSetOperation(device, bufferedSettings) + if setError != nil { + unix.Close(int(tun_fd)) + logger.Error.Println(setError) + return -1 + } + + device.Up() + logger.Info.Println("Device started") + + var i int32 + for i = 0; i < math.MaxInt32; i++ { + if _, exists := tunnelHandles[i]; !exists { + break + } + } + if i == math.MaxInt32 { + unix.Close(int(tun_fd)) + return -1 + } + tunnelHandles[i] = device + return i +} + +//export wgTurnOff +func wgTurnOff(tunnelHandle int32) { + device, ok := tunnelHandles[tunnelHandle] + if !ok { + return + } + delete(tunnelHandles, tunnelHandle) + device.Close() +} + +//export wgGetSocketV4 +func wgGetSocketV4(tunnelHandle int32) int32 { + device, ok := tunnelHandles[tunnelHandle] + if !ok { + return -1 + } + native, ok := device.net.bind.(*NativeBind) + if !ok { + return -1 + } + fd := int32(-1) + conn, err := native.ipv4.SyscallConn() + if err != nil { + return -1 + } + err = conn.Control(func(f uintptr) { + fd = int32(f) + }) + if err != nil { + return -1 + } + return fd +} + +//export wgGetSocketV6 +func wgGetSocketV6(tunnelHandle int32) int32 { + device, ok := tunnelHandles[tunnelHandle] + if !ok { + return -1 + } + native, ok := device.net.bind.(*NativeBind) + if !ok { + return -1 + } + fd := int32(-1) + conn, err := native.ipv6.SyscallConn() + if err != nil { + return -1 + } + err = conn.Control(func(f uintptr) { + fd = int32(f) + }) + if err != nil { + return -1 + } + return fd +} + +func main() {} diff --git a/app/tools/libwg-go/src/git.zx2c4.com/wireguard-go/jni.c b/app/tools/libwg-go/src/git.zx2c4.com/wireguard-go/jni.c new file mode 100644 index 00000000..a0f3d0ba --- /dev/null +++ b/app/tools/libwg-go/src/git.zx2c4.com/wireguard-go/jni.c @@ -0,0 +1,45 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later + * + * Copyright © 2017-2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved. + */ + +#include <jni.h> + +struct go_string { const char *str; long n; }; +extern int wgTurnOn(struct go_string ifname, int tun_fd, struct go_string settings); +extern void wgTurnOff(int handle); +extern int wgGetSocketV4(int handle); +extern int wgGetSocketV6(int handle); + +JNIEXPORT jint JNICALL Java_com_wireguard_android_backend_GoBackend_wgTurnOn(JNIEnv *env, jclass c, jstring ifname, jint tun_fd, jstring settings) +{ + const char *ifname_str = (*env)->GetStringUTFChars(env, ifname, 0); + size_t ifname_len = (*env)->GetStringUTFLength(env, ifname); + const char *settings_str = (*env)->GetStringUTFChars(env, settings, 0); + size_t settings_len = (*env)->GetStringUTFLength(env, settings); + int ret = wgTurnOn((struct go_string){ + .str = ifname_str, + .n = ifname_len + }, tun_fd, (struct go_string){ + .str = settings_str, + .n = settings_len + }); + (*env)->ReleaseStringUTFChars(env, ifname, ifname_str); + (*env)->ReleaseStringUTFChars(env, settings, settings_str); + return ret; +} + +JNIEXPORT void JNICALL Java_com_wireguard_android_backend_GoBackend_wgTurnOff(JNIEnv *env, jclass c, jint handle) +{ + wgTurnOff(handle); +} + +JNIEXPORT jint JNICALL Java_com_wireguard_android_backend_GoBackend_wgGetSocketV4(JNIEnv *env, jclass c, jint handle) +{ + return wgGetSocketV4(handle); +} + +JNIEXPORT jint JNICALL Java_com_wireguard_android_backend_GoBackend_wgGetSocketV6(JNIEnv *env, jclass c, jint handle) +{ + return wgGetSocketV6(handle); +} diff --git a/app/tools/libwg-go/src/git.zx2c4.com/wireguard-go/tun/api-android.go b/app/tools/libwg-go/src/git.zx2c4.com/wireguard-go/tun/api-android.go new file mode 100644 index 00000000..3cb5753e --- /dev/null +++ b/app/tools/libwg-go/src/git.zx2c4.com/wireguard-go/tun/api-android.go @@ -0,0 +1,31 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later + * + * Copyright (C) 2017-2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved. + */ + +package tun + +import ( + "git.zx2c4.com/wireguard-go/rwcancel" + "os" +) + +func CreateTUNFromFD(tun_fd int) (TUNDevice, string, error) { + tun := &nativeTun{ + fd: os.NewFile(uintptr(tun_fd), "/dev/tun"), + events: make(chan TUNEvent, 5), + errors: make(chan error, 5), + nopi: true, + } + var err error + tun.fdCancel, err = rwcancel.NewRWCancel(tun_fd) + if err != nil { + return nil, "", err + } + name, err := tun.Name() + if err != nil { + tun.fdCancel.Cancel() + return nil, "", err + } + return tun, name, nil +} |