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// Copyright (C) 2011-2012, 2014 Internet Systems Consortium, Inc. ("ISC")
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
#ifndef OPTION6_ADDRLST_H
#define OPTION6_ADDRLST_H
#include <asiolink/io_address.h>
#include <dhcp/option.h>
#include <boost/shared_ptr.hpp>
#include <vector>
namespace isc {
namespace dhcp {
/// @brief DHCPv6 Option class for handling list of IPv6 addresses.
///
/// This class handles a list of IPv6 addresses. An example of such option
/// is dns-servers option. It can also be used to handle single address.
class Option6AddrLst: public Option {
public:
/// a container for (IPv6) addresses
typedef std::vector<isc::asiolink::IOAddress> AddressContainer;
/// @brief Constructor used during option generation.
///
/// @param type option type
/// @param addrs vector of addresses to be stored
Option6AddrLst(uint16_t type, const AddressContainer& addrs);
/// @brief Simplified constructor for a single address
///
/// @param type option type
/// @param addr a single address to be stored
Option6AddrLst(uint16_t type, const isc::asiolink::IOAddress& addr);
/// @brief Constructor used for parsing received option
///
/// @param type option type
/// @param begin iterator to first byte of option data
/// @param end iterator to end of option data (first byte after option end)
Option6AddrLst(uint16_t type, OptionBufferConstIter begin,
OptionBufferConstIter end);
/// @brief Assembles on-wire form of this option
///
/// @param buf pointer to packet buffer
void pack(isc::util::OutputBuffer& buf);
/// @brief Parses received data
///
/// @param begin iterator to first byte of option data
/// @param end iterator to end of option data (first byte after option end)
virtual void unpack(OptionBufferConstIter begin,
OptionBufferConstIter end);
virtual std::string toText(int indent = 0);
/// @brief Sets a single address.
///
/// @param addr a single address to be added
void setAddress(const isc::asiolink::IOAddress& addr);
/// @brief Sets list of addresses.
///
/// @param addrs a vector of addresses to be added
void setAddresses(const AddressContainer& addrs);
/// @brief Returns vector with addresses.
///
/// We return a copy of our list. Although this includes overhead,
/// it also makes this list safe to use after this option object
/// is no longer available. As options are expected to hold only
/// a few (1-3) addresses, the overhead is not that big.
///
/// @return address container with addresses
AddressContainer getAddresses() const { return addrs_; };
// returns data length (data length + DHCPv4/DHCPv6 option header)
virtual uint16_t len();
protected:
AddressContainer addrs_;
};
/// @brief Pointer to the @c Option6AddrLst object.
typedef boost::shared_ptr<Option6AddrLst> Option6AddrLstPtr;
} // isc::dhcp namespace
} // isc namespace
#endif // OPTION_ADDRLST_H
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