Migrate tunnel related classes to tunnel/ Gradle module

Signed-off-by: Harsh Shandilya <me@msfjarvis.dev>

1 files changed, 71 insertions, 0 deletions

diff --git a/tunnel/tools/libwg-go/jni.c b/tunnel/tools/libwg-go/jni.c
new file mode 100644
index 00000000..3f877d47
--- /dev/null
+++ b/tunnel/tools/libwg-go/jni.c
@@ -0,0 +1,71 @@
+/* SPDX-License-Identifier: Apache-2.0
+ *
+ * Copyright © 2017-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
+ */
+
+#include <jni.h>
+#include <stdlib.h>
+#include <string.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);
+extern char *wgGetConfig(int handle);
+extern char *wgVersion();
+
+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);
+}
+
+JNIEXPORT jstring JNICALL Java_com_wireguard_android_backend_GoBackend_wgGetConfig(JNIEnv *env, jclass c, jint handle)
+{
+	jstring ret;
+	char *config = wgGetConfig(handle);
+	if (!config)
+		return NULL;
+	ret = (*env)->NewStringUTF(env, config);
+	free(config);
+	return ret;
+}
+
+JNIEXPORT jstring JNICALL Java_com_wireguard_android_backend_GoBackend_wgVersion(JNIEnv *env, jclass c)
+{
+	jstring ret;
+	char *version = wgVersion();
+	if (!version)
+		return NULL;
+	ret = (*env)->NewStringUTF(env, version);
+	free(version);
+	return ret;
+}