[NaCl SDK] nacl_io: add getnameinfo scaffolding

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 1338 matching lines @@
   return host_resolver_.freeaddrinfo(res);
 }
 
 int KernelProxy::getaddrinfo(const char* node,
                              const char* service,
                              const struct addrinfo* hints,
                              struct addrinfo** res) {
   return host_resolver_.getaddrinfo(node, service, hints, res);
 }
 
+int KernelProxy::getnameinfo(const struct sockaddr *sa,
+                             socklen_t salen,
+                             char *host,
+                             size_t hostlen,
+                             char *serv,
+                             size_t servlen,
+                             int flags) {
+  return host_resolver_.getnameinfo(sa, salen, host, hostlen, serv, servlen,
+                                    flags);
+}
+
 struct hostent* KernelProxy::gethostbyname(const char* name) {
   return host_resolver_.gethostbyname(name);
 }
 
 int KernelProxy::getpeername(int fd, struct sockaddr* addr, socklen_t* len) {
   if (NULL == addr || NULL == len) {
     errno = EFAULT;
     return -1;
   }
 
@@ skipping 339 matching lines @@
     errno = ENOTSOCK;
     return -1;
   }
 
   return 0;
 }
 
 #endif  // PROVIDES_SOCKET_API
 
 }  // namespace_nacl_io