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/*
* Copyright (c) 2020, The SerenityOS developers.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "DHCPv4.h"
#include <AK/HashMap.h>
#include <AK/OwnPtr.h>
#include <AK/String.h>
#include <AK/Vector.h>
#include <LibCore/UDPServer.h>
#include <net/if.h>
#include <net/route.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
struct InterfaceDescriptor {
String m_ifname;
MACAddress m_mac_address;
};
struct DHCPv4Transaction {
DHCPv4Transaction(InterfaceDescriptor ifname)
: interface(ifname)
{
}
InterfaceDescriptor interface;
bool accepted_offer { false };
bool has_ip { false };
u32 offered_lease_time { 0 };
};
class DHCPv4Client final : public Core::Object {
C_OBJECT(DHCPv4Client)
public:
explicit DHCPv4Client(Vector<InterfaceDescriptor> ifnames);
virtual ~DHCPv4Client() override;
void dhcp_discover(const InterfaceDescriptor& ifname, IPv4Address previous = IPv4Address { 0, 0, 0, 0 });
void dhcp_request(DHCPv4Transaction& transaction, const DHCPv4Packet& packet);
void process_incoming(const DHCPv4Packet& packet);
bool id_is_registered(u32 id) { return m_ongoing_transactions.contains(id); }
private:
HashMap<u32, OwnPtr<DHCPv4Transaction>> m_ongoing_transactions;
Vector<InterfaceDescriptor> m_ifnames;
RefPtr<Core::UDPServer> m_server;
void handle_offer(const DHCPv4Packet&, const ParsedDHCPv4Options&);
void handle_ack(const DHCPv4Packet&, const ParsedDHCPv4Options&);
void handle_nak(const DHCPv4Packet&, const ParsedDHCPv4Options&);
};
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