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// Copyright (c) 2012 The Chromium OS 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 SHILL_ARP_PACKET_H_
#define SHILL_ARP_PACKET_H_
#include "shill/net/byte_string.h"
#include "shill/net/ip_address.h"
namespace shill {
// ArpPacket encapsulates the task of creating and parsing
// Address Resolution Protocol (ARP) packets for IP and
// IPv6 protocols on Ethernet (or Ethernet-like) networks.
class ArpPacket {
public:
ArpPacket();
ArpPacket(const IPAddress& local_ip, const IPAddress& remote_ip,
const ByteString& local_mac, const ByteString& remote_mac);
virtual ~ArpPacket();
// Parse a payload and save to local parameters.
bool Parse(const ByteString& packet);
// Output a payload from local parameters.
bool FormatRequest(ByteString* packet) const;
// Returns true if this packet is an ARP response.
bool IsReply() const;
// Getters and seters.
const IPAddress& local_ip_address() const { return local_ip_address_; }
void set_local_ip_address(const IPAddress& address) {
local_ip_address_ = address;
}
const IPAddress& remote_ip_address() const { return remote_ip_address_; }
void set_remote_ip_address(const IPAddress& address) {
remote_ip_address_ = address;
}
const ByteString& local_mac_address() const { return local_mac_address_; }
void set_local_mac_address(const ByteString& address) {
local_mac_address_ = address;
}
const ByteString& remote_mac_address() const { return remote_mac_address_; }
void set_remote_mac_address(const ByteString& address) {
remote_mac_address_ = address;
}
uint16_t operation() const { return operation_; }
void set_operation(uint16_t operation) {
operation_ = operation;
}
private:
friend class ArpPacketTest;
// The minimum number of bytes of ARP payload which will produce the
// smallest valid Ethernet frame.
static const size_t kMinPayloadSize;
uint16_t operation_;
IPAddress local_ip_address_;
IPAddress remote_ip_address_;
ByteString local_mac_address_;
ByteString remote_mac_address_;
DISALLOW_COPY_AND_ASSIGN(ArpPacket);
};
} // namespace shill
#endif // SHILL_ARP_PACKET_H_