[NaCl SDK] Add UDP and TCP Sockets

native_client_sdk/src/libraries/nacl_io/kernel_handle.h

Index: native_client_sdk/src/libraries/nacl_io/kernel_handle.h
diff --git a/native_client_sdk/src/libraries/nacl_io/kernel_handle.h b/native_client_sdk/src/libraries/nacl_io/kernel_handle.h
index ad2b9002eb2576d302a282c3bf66a1b0dcb8df90..fd76ddecfc1f0c2e134f7187f3aa1049ce08b90c 100644
--- a/native_client_sdk/src/libraries/nacl_io/kernel_handle.h
+++ b/native_client_sdk/src/libraries/nacl_io/kernel_handle.h
@@ -19,6 +19,9 @@
 
 namespace nacl_io {
 
+class MountNode;
+class MountNodeSocket;
+
 // KernelHandle provides a reference counted container for the open
 // file information, such as it's mount, node, access type and offset.
 // KernelHandle can only be referenced when the KernelProxy lock is held.
@@ -41,6 +44,10 @@ class KernelHandle : public sdk_util::RefObject {
   const ScopedMountNode& node() { return node_; }
   const ScopedMount& mount() { return mount_; }
 
+  // Returns the MountNodeSocket* if this node is a socket otherwise returns
+  // NULL.
+  MountNodeSocket* socket_node();
+
 private:
   ScopedMount mount_;
   ScopedMountNode node_;