nacl_io: Add SOCK_DGRAM support to socketpair()

native_client_sdk/src/libraries/nacl_io/kernel_proxy.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "nacl_io/kernel_proxy.h"
 
 #include <assert.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <limits.h>
@@ skipping 1806 matching lines @@
   if (AF_INET == domain || AF_INET6 == domain) {
     errno = EOPNOTSUPP;
     return -1;
   }
 
   if (AF_UNIX != domain) {
     errno = EAFNOSUPPORT;
     return -1;
   }
 
-  if (SOCK_STREAM != type) {
+  // TODO(cernekee): mask this off with SOCK_TYPE_MASK first.
+  if (SOCK_STREAM != type && SOCK_DGRAM != type) {
     errno = EPROTOTYPE;
     return -1;
   }
 
   int open_flags = O_RDWR;
 
 #if defined(SOCK_CLOEXEC)
   if (type & SOCK_CLOEXEC) {
 #if defined(O_CLOEXEC)
     // The NaCl newlib version of fcntl.h doesn't currently define
     // O_CLOEXEC.
     // TODO(sbc): remove this guard once it gets added.
     open_flags |= O_CLOEXEC;
 #endif
     type &= ~SOCK_CLOEXEC;
   }
 #endif
 
 #if defined(SOCK_NONBLOCK)
   if (type & SOCK_NONBLOCK) {
     open_flags |= O_NONBLOCK;
     type &= ~SOCK_NONBLOCK;
   }
 #endif
 
-  UnixNode* socket = new UnixNode(stream_fs_.get());
+  UnixNode* socket = new UnixNode(stream_fs_.get(), type);
   Error rtn = socket->Init(O_RDWR);
   if (rtn != 0) {
     errno = rtn;
     return -1;
   }
   ScopedNode node0(socket);
   socket = new UnixNode(stream_fs_.get(), *socket);
   rtn = socket->Init(O_RDWR);
   if (rtn != 0) {
     errno = rtn;
@@ skipping 31 matching lines @@
     errno = ENOTSOCK;
     return -1;
   }
 
   return 0;
 }
 
 #endif  // PROVIDES_SOCKET_API
 
 }  // namespace_nacl_io