From dea60e13c0f32d5e1f2b6f36e5657ff7350894ce Mon Sep 17 00:00:00 2001 From: "Jason A. Donenfeld" Date: Tue, 5 Jun 2018 02:17:50 +0200 Subject: libwg-go: more efficient and safer string passing It was unclear when the Go string was actually freed. Signed-off-by: Jason A. Donenfeld --- .../libwg-go/src/git.zx2c4.com/wireguard-go/api-android.go | 4 ++-- app/tools/libwg-go/src/git.zx2c4.com/wireguard-go/jni.c | 13 +++++-------- 2 files changed, 7 insertions(+), 10 deletions(-) (limited to 'app/tools') 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 index 19063eec..8ef5f21b 100644 --- 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 @@ -161,8 +161,8 @@ func wgGetSocketV6(tunnelHandle int32) int32 { } //export wgVersion -func wgVersion() string { - return WireGuardGoVersion +func wgVersion() *C.char { + return C.CString(WireGuardGoVersion) } 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 index 7cfadcd2..102c363f 100644 --- 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 @@ -12,7 +12,7 @@ extern int wgTurnOn(struct go_string ifname, int tun_fd, struct go_string settin extern void wgTurnOff(int handle); extern int wgGetSocketV4(int handle); extern int wgGetSocketV6(int handle); -extern struct go_string wgVersion(); +extern char *wgVersion(); JNIEXPORT jint JNICALL Java_com_wireguard_android_backend_GoBackend_wgTurnOn(JNIEnv *env, jclass c, jstring ifname, jint tun_fd, jstring settings) { @@ -50,13 +50,10 @@ JNIEXPORT jint JNICALL Java_com_wireguard_android_backend_GoBackend_wgGetSocketV JNIEXPORT jstring JNICALL Java_com_wireguard_android_backend_GoBackend_wgVersion(JNIEnv *env, jclass c) { jstring ret; - struct go_string s = wgVersion(); - char *cstr = malloc(s.n + 1); - if (!cstr) + char *version = wgVersion(); + if (!version) return NULL; - memcpy(cstr, s.str, s.n); - cstr[s.n] = '\0'; - ret = (*env)->NewStringUTF(env, cstr); - free(cstr); + ret = (*env)->NewStringUTF(env, version); + free(version); return ret; } -- cgit v1.2.3