8235193: (dc) Remove JNI overhead from DatagramChannel.send implementation

Reviewed-by: chegar

src/java.base/share/classes/java/net/Inet4Address.java

@@ -310,6 +310,13 @@ class Inet4Address extends InetAddress {
         return addr;
     }
 
+    /**
+     * Returns the 32-bit IPv4 address.
+     */
+    int addressValue() {
+        return holder().getAddress();
+    }
+
     /**
      * Returns the IP address string in textual presentation form.
      *

src/java.base/share/classes/java/net/Inet6Address.java

@@ -793,6 +793,7 @@ class Inet6Address extends InetAddress {
     public boolean isMCOrgLocal() {
         return holder6.isMCOrgLocal();
     }
+
     /**
      * Returns the raw IP address of this {@code InetAddress} object. The result
      * is in network byte order: the highest order byte of the address is in
@@ -805,6 +806,13 @@ class Inet6Address extends InetAddress {
         return holder6.ipaddress.clone();
     }
 
+    /**
+     * Returns a reference to the byte[] with the IPv6 address.
+     */
+    byte[] addressBytes() {
+        return holder6.ipaddress;
+    }
+
     /**
      * Returns the numeric scopeId, if this instance is associated with
      * an interface. If no scoped_id is set, the returned value is zero.
@@ -814,7 +822,7 @@ class Inet6Address extends InetAddress {
      * @since 1.5
      */
      public int getScopeId() {
-        return holder6.scope_id;
+         return holder6.scope_id;
      }
 
     /**
@@ -825,7 +833,7 @@ class Inet6Address extends InetAddress {
      * @since 1.5
      */
      public NetworkInterface getScopedInterface() {
-        return holder6.scope_ifname;
+         return holder6.scope_ifname;
      }
 
     /**

src/java.base/share/classes/java/net/InetAddress.java

@@ -326,10 +326,18 @@ public class InetAddress implements java.io.Serializable {
 
                     public InetAddress getByName(String hostName,
                                                  InetAddress hostAddress)
-                            throws UnknownHostException
+                        throws UnknownHostException
                     {
                         return InetAddress.getByName(hostName, hostAddress);
                     }
+
+                    public int addressValue(Inet4Address inet4Address) {
+                        return inet4Address.addressValue();
+                    }
+
+                    public byte[] addressBytes(Inet6Address inet6Address) {
+                        return inet6Address.addressBytes();
+                    }
                 }
         );
         init();