dhcp.hh

/*
 * This file is open source software, licensed to you under the terms
 * of the Apache License, Version 2.0 (the "License").  See the NOTICE file
 * distributed with this work for additional information regarding copyright
 * ownership.  You may not use this file except in compliance with the License.
 *
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
/*
 * Copyright 2014 Cloudius Systems
 */
 
#pragma once
 
#include <seastar/net/ip.hh>
#include <seastar/util/std-compat.hh>
 
namespace seastar {
 
namespace net {
 
/*
 * Simplistic DHCP query class.
 * Due to the nature of the native stack,
 * it operates on an "ipv4" object instead of,
 * for example, an interface.
 */
class dhcp {
public:
    dhcp(ipv4 &);
    dhcp(dhcp &&) noexcept;
    ~dhcp();
 
    static const steady_clock_type::duration default_timeout;
 
    struct lease {
        ipv4_address ip;
        ipv4_address netmask;
        ipv4_address broadcast;
 
        ipv4_address gateway;
        ipv4_address dhcp_server;
 
        std::vector<ipv4_address> name_servers;
 
        std::chrono::seconds lease_time;
        std::chrono::seconds renew_time;
        std::chrono::seconds rebind_time;
 
        uint16_t mtu = 0;
    };
 
    typedef future<std::optional<lease>> result_type;
 
    result_type discover(const steady_clock_type::duration & = default_timeout);
    result_type renew(const lease &, const steady_clock_type::duration & = default_timeout);
    ip_packet_filter* get_ipv4_filter();
private:
    class impl;
    std::unique_ptr<impl> _impl;
};
 
}
 
}