IpSec - API Tweak for removeTransportModeTransform

Because IpSecTransforms are now unidirectional,
and because the only mechanism for removing Transforms
removes it from both directions, the API can no longer
use the Transform parameter to meaningfully validate
that the caller had applied a transform. Since that
functionality was as-yet unimplemented and is now
infeasible, the transform parameter is removed.

Bug: 72079356
Test: cts - IpSecManagerTest; runtest frameworks-net
Change-Id: If19b0d34bdc6daf31a40d6d62bff326dcbca08c0

core/java/android/net/IIpSecService.aidl

@@ -45,5 +45,5 @@ interface IIpSecService
 
     void applyTransportModeTransform(in ParcelFileDescriptor socket, int direction, int transformId);
 
-    void removeTransportModeTransforms(in ParcelFileDescriptor socket, int transformId);
+    void removeTransportModeTransforms(in ParcelFileDescriptor socket);
 }

core/java/android/net/IpSecManager.java

@@ -405,62 +405,56 @@ public final class IpSecManager {
     /**
      * Remove an IPsec transform from a stream socket.
      *
-     * <p>Once removed, traffic on the socket will not be encrypted. This operation will succeed
+     * <p>Once removed, traffic on the socket will not be encrypted. Removing transforms from a
-     * regardless of the state of the transform. Removing a transform from a socket allows the
+     * socket allows the socket to be reused for communication in the clear.
-     * socket to be reused for communication in the clear.
      *
      * <p>If an {@code IpSecTransform} object applied to this socket was deallocated by calling
      * {@link IpSecTransform#close()}, then communication on the socket will fail until this method
      * is called.
      *
      * @param socket a socket that previously had a transform applied to it
-     * @param transform the IPsec Transform that was previously applied to the given socket
      * @throws IOException indicating that the transform could not be removed from the socket
      */
-    public void removeTransportModeTransforms(Socket socket, IpSecTransform transform)
+    public void removeTransportModeTransforms(Socket socket)
             throws IOException {
-        removeTransportModeTransforms(socket.getFileDescriptor$(), transform);
+        removeTransportModeTransforms(socket.getFileDescriptor$());
     }
 
     /**
      * Remove an IPsec transform from a datagram socket.
      *
-     * <p>Once removed, traffic on the socket will not be encrypted. This operation will succeed
+     * <p>Once removed, traffic on the socket will not be encrypted. Removing transforms from a
-     * regardless of the state of the transform. Removing a transform from a socket allows the
+     * socket allows the socket to be reused for communication in the clear.
-     * socket to be reused for communication in the clear.
      *
      * <p>If an {@code IpSecTransform} object applied to this socket was deallocated by calling
      * {@link IpSecTransform#close()}, then communication on the socket will fail until this method
      * is called.
      *
      * @param socket a socket that previously had a transform applied to it
-     * @param transform the IPsec Transform that was previously applied to the given socket
      * @throws IOException indicating that the transform could not be removed from the socket
      */
-    public void removeTransportModeTransforms(DatagramSocket socket, IpSecTransform transform)
+    public void removeTransportModeTransforms(DatagramSocket socket)
             throws IOException {
-        removeTransportModeTransforms(socket.getFileDescriptor$(), transform);
+        removeTransportModeTransforms(socket.getFileDescriptor$());
     }
 
     /**
      * Remove an IPsec transform from a socket.
      *
-     * <p>Once removed, traffic on the socket will not be encrypted. This operation will succeed
+     * <p>Once removed, traffic on the socket will not be encrypted. Removing transforms from a
-     * regardless of the state of the transform. Removing a transform from a socket allows the
+     * socket allows the socket to be reused for communication in the clear.
-     * socket to be reused for communication in the clear.
      *
      * <p>If an {@code IpSecTransform} object applied to this socket was deallocated by calling
      * {@link IpSecTransform#close()}, then communication on the socket will fail until this method
      * is called.
      *
      * @param socket a socket that previously had a transform applied to it
-     * @param transform the IPsec Transform that was previously applied to the given socket
      * @throws IOException indicating that the transform could not be removed from the socket
      */
-    public void removeTransportModeTransforms(FileDescriptor socket, IpSecTransform transform)
+    public void removeTransportModeTransforms(FileDescriptor socket)
             throws IOException {
         try (ParcelFileDescriptor pfd = ParcelFileDescriptor.dup(socket)) {
-            mService.removeTransportModeTransforms(pfd, transform.getResourceId());
+            mService.removeTransportModeTransforms(pfd);
         } catch (RemoteException e) {
             throw e.rethrowFromSystemServer();
         }

services/core/java/com/android/server/IpSecService.java

@@ -1235,8 +1235,8 @@ public class IpSecService extends IIpSecService.Stub {
      * reserved for future improved input validation.
      */
     @Override
-    public synchronized void removeTransportModeTransforms(
+    public synchronized void removeTransportModeTransforms(ParcelFileDescriptor socket)
-            ParcelFileDescriptor socket, int resourceId) throws RemoteException {
+            throws RemoteException {
         try {
             mSrvConfig
                     .getNetdInstance()