Add IPAddress class as a replacement for the IPAddressNumber typedef.

net/base/ip_address.h

+// Copyright (c) 2015 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.
+
+#ifndef NET_BASE_IP_ADDRESS_NET_H_
+#define NET_BASE_IP_ADDRESS_NET_H_
+
+#include <vector>
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "base/strings/string_piece.h"
+#include "net/base/net_export.h"
+
+namespace net {
+
+class NET_EXPORT IPAddress {
+ public:
+  static const size_t kIPv4AddressSize;
+  static const size_t kIPv6AddressSize;
+
+  // Creates a zero-sized, invalid address.
+  IPAddress();
+
+  // Copies the input address to |ip_address_|. The input is expected to be in
+  // network byte order.
+  IPAddress(const uint8_t* address, size_t address_len);
+  ~IPAddress();
+
+  // Returns true if the IP has |kIPv4AddressSize| elements.
+  bool IsIPv4() const;
+
+  // Returns true if the IP has |kIPv6AddressSize| elements.
+  bool IsIPv6() const;
+
+  // Returns true if an IP address hostname is in a range reserved by the IANA.
+  // Works with both IPv4 and IPv6 addresses, and only compares against a given
+  // protocols's reserved ranges.
+  bool IsReserved() const;
+
+  // Returns true if |ip_address_| is an IPv4-mapped IPv6 address.
+  bool IsIPv4Mapped() const;
+
+  // The size in bytes of |ip_address_|.
+  size_t size() const { return ip_address_.size(); }
+
+  // Returns the canonical string representation of an IP address.
+  // For example: "192.168.0.1" or "::1". The IP address must be
+  // valid, calling this on an invalid address will result in a crash.
+  std::string ToString() const;
+
+  // Parses an IP address literal (either IPv4 or IPv6) to its numeric value.
+  // Returns true on success and fills |ip_address| with the numeric value.
+  static bool FromIPLiteral(const base::StringPiece& ip_literal,
+                            IPAddress* ip_address) WARN_UNUSED_RESULT;
+
+  // Returns the underlying byte vector.
+  const std::vector<uint8_t>& bytes() const { return ip_address_; };
+
+  bool operator==(const IPAddress& that) const;
+  bool operator<(const IPAddress& that) const;
+
+ private:
+  // IPv4 addresses will have length kIPv4AddressSize, whereas IPv6 address
+  // will have length kIPv6AddressSize.
+  std::vector<uint8_t> ip_address_;
+};
+
+}  // namespace net
+
+#endif  // NET_BASE_IP_ADDRESS_NET_H_