Refactor tcp socket and unix domain socket.

net/base/net_util.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 "net/base/net_util.h"
 
 #include <errno.h>
+#include <string.h>
 
 #include <algorithm>
 #include <iterator>
 #include <set>
 
 #include "build/build_config.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #include <iphlpapi.h>
@@ skipping 476 matching lines @@
   if (!array)
     return false;
   size_t width = host_addr.size() + 1;
   for (size_t i = 0; i < array_size; ++i, array += width) {
     if (IPNumberPrefixCheck(host_addr, array, array[width-1]))
       return true;
   }
   return false;
 }
 
+SockaddrStorage::SockaddrStorage(const SockaddrStorage& other)
+    : addr_len(other.addr_len),
+      addr(reinterpret_cast<struct sockaddr*>(&addr_storage)) {
+  memcpy(addr, other.addr, addr_len);
+}
+
+void SockaddrStorage::operator=(const SockaddrStorage& other) {

[mmenke, 2014/06/30 18:26:51]

Ahh...right.  Mind adding a comment along those lines, for people for whom that
isn't immediately obvious?

[byungchul, 2014/06/30 19:38:34]

Done.

+  addr_len = other.addr_len;
+  memcpy(addr, other.addr, addr_len);
+}
+
 // Extracts the address and port portions of a sockaddr.
 bool GetIPAddressFromSockAddr(const struct sockaddr* sock_addr,
                               socklen_t sock_addr_len,
                               const uint8** address,
                               size_t* address_len,
                               uint16* port) {
   if (sock_addr->sa_family == AF_INET) {
     if (sock_addr_len < static_cast<socklen_t>(sizeof(struct sockaddr_in)))
       return false;
     const struct sockaddr_in* addr =
@@ skipping 483 matching lines @@
   }
   return a1.size() * CHAR_BIT;
 }
 
 unsigned MaskPrefixLength(const IPAddressNumber& mask) {
   IPAddressNumber all_ones(mask.size(), 0xFF);
   return CommonPrefixLength(mask, all_ones);
 }
 
 }  // namespace net