src/jdk.net/linux/native/libextnet/LinuxSocketOptions.c

@@ -21,10 +21,12 @@
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  */
 #include <sys/socket.h>
+#include <sys/un.h>
+#include <sys/types.h>
 #include <string.h>
 #include <errno.h>
 #include <unistd.h>
 
 #include <jni.h>

@@ -109,10 +111,36 @@
     return socketOptionSupported(SOL_SOCKET, TCP_QUICKACK);
 }
 
 /*
  * Class:     jdk_net_LinuxSocketOptions
+ * Method:    getSoPeerCred0
+ * Signature: (I[I)I
+ */
+JNIEXPORT void JNICALL Java_jdk_net_LinuxSocketOptions_getSoPeerCred0
+  (JNIEnv *env, jclass clazz, jint fd, jintArray result) {
+
+    int rv;
+    struct ucred cred;
+    socklen_t len = sizeof(cred);
+    int *rr = (int *)(*env)->GetIntArrayElements(env, result, NULL);
+
+    if ((rv=getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &cred, &len)) < 0) {
+        handleError(env, rv, "get SO_PEERCRED failed");
+    } else {
+        if ((int)cred.uid == -1) {
+            handleError(env, -1, "get SO_PEERCRED failed");
+        } else {
+            rr[0] = cred.uid;
+            rr[1] = cred.gid;
+        }
+    }
+    (*env)->ReleaseIntArrayElements(env, result, rr, 0);
+}
+
+/*
+ * Class:     jdk_net_LinuxSocketOptions
  * Method:    keepAliveOptionsSupported0
  * Signature: ()Z
  */
 JNIEXPORT jboolean JNICALL Java_jdk_net_LinuxSocketOptions_keepAliveOptionsSupported0
 (JNIEnv *env, jobject unused) {