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authorJason A. Donenfeld <Jason@zx2c4.com>2018-02-07 19:19:20 +0100
committerJason A. Donenfeld <Jason@zx2c4.com>2018-02-17 21:14:09 +0100
commit0ea6f73332cf48374b8a98b16d68e25217ebf068 (patch)
tree53694268b30823c8973d6ae280ed766f4b44b974 /app/tools/libwg-go
parentb923f7bc57c39687bed225badeac0b35a7dee855 (diff)
GoBackend: integrate into app
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Diffstat (limited to 'app/tools/libwg-go')
-rw-r--r--app/tools/libwg-go/.gitignore4
-rw-r--r--app/tools/libwg-go/Makefile21
-rw-r--r--app/tools/libwg-go/api-android.go111
-rw-r--r--app/tools/libwg-go/jni.c40
4 files changed, 176 insertions, 0 deletions
diff --git a/app/tools/libwg-go/.gitignore b/app/tools/libwg-go/.gitignore
new file mode 100644
index 00000000..c039ddfb
--- /dev/null
+++ b/app/tools/libwg-go/.gitignore
@@ -0,0 +1,4 @@
+go/
+*.go
+libwg-go.h
+jni.o
diff --git a/app/tools/libwg-go/Makefile b/app/tools/libwg-go/Makefile
new file mode 100644
index 00000000..300b3841
--- /dev/null
+++ b/app/tools/libwg-go/Makefile
@@ -0,0 +1,21 @@
+containing = $(foreach v,$2,$(if $(findstring $1,$v),$v))
+FILES := $(wildcard ../wireguard-go/*/*.go) $(wildcard ../wireguard-go/*.go)
+FILES := $(filter-out %/main.go $(filter-out %_linux.go,$(call containing,_,$(FILES))),$(FILES))
+
+export GOPATH := $(CURDIR)/go
+CLANG_FLAGS := --target=$(ANDROID_LLVM_TRIPLE) --gcc-toolchain=$(ANDROID_TOOLCHAIN_ROOT) --sysroot=$(ANDROID_SYSROOT)
+export CGO_CFLAGS := $(CLANG_FLAGS) $(CFLAGS)
+export CGO_LDFLAGS := $(CLANG_FLAGS) $(LDFLAGS)
+export CC := $(ANDROID_C_COMPILER)
+GO_ARCH_FILTER := case "$(ANDROID_ARCH_NAME)" in x86) echo 386 ;; x86_64) echo amd64 ;; *) echo $(ANDROID_ARCH_NAME) ;; esac
+export GOARCH := $(shell $(GO_ARCH_FILTER))
+export GOOS := android
+export CGO_ENABLED := 1
+
+$(DESTDIR)/libwg-go.so: $(FILES) api-android.go jni.c
+ find . -name '*.go' -type l -delete
+ find . -type d -empty -delete
+ mkdir -p $(subst ../wireguard-go/,./,$(dir $(FILES)))
+ $(foreach FILE,$(FILES),ln -sfrt $(subst ../wireguard-go/,./,$(dir $(FILE))) $(FILE);)
+ go get -v -d
+ go build -v -o $(DESTDIR)/libwg-go.so -buildmode c-shared
diff --git a/app/tools/libwg-go/api-android.go b/app/tools/libwg-go/api-android.go
new file mode 100644
index 00000000..b2e3da17
--- /dev/null
+++ b/app/tools/libwg-go/api-android.go
@@ -0,0 +1,111 @@
+package main
+
+// #cgo LDFLAGS: -llog
+// #include <android/log.h>
+import "C"
+
+import (
+ "bufio"
+ "io/ioutil"
+ "log"
+ "math"
+ "os"
+ "strings"
+)
+
+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)
+}
+
+//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 := &NativeTun{
+ fd: os.NewFile(uintptr(tun_fd), ""),
+ events: make(chan TUNEvent, 5),
+ errors: make(chan error, 5),
+ }
+ device := NewDevice(tun, logger)
+ device.tun.mtu = DefaultMTU //TODO: make dynamic
+
+ bufferedSettings := bufio.NewReadWriter(bufio.NewReader(strings.NewReader(settings)), bufio.NewWriter(ioutil.Discard))
+ setError := ipcSetOperation(device, bufferedSettings)
+ if setError != nil {
+ logger.Debug.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 {
+ 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
+ }
+ return int32(native.sock4)
+}
+
+//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
+ }
+ return int32(native.sock6)
+}
+
+func main() {}
diff --git a/app/tools/libwg-go/jni.c b/app/tools/libwg-go/jni.c
new file mode 100644
index 00000000..1476dab7
--- /dev/null
+++ b/app/tools/libwg-go/jni.c
@@ -0,0 +1,40 @@
+#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);
+}