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/* $Id: NetworkManagerDhcp.cpp $ */
/** @file
* NetworkManagerDhcp - Network Manager part handling Dhcp.
*/
/*
* Copyright (C) 2013-2019 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#include <iprt/asm.h>
#include <iprt/cdefs.h>
#include <iprt/getopt.h>
#include <iprt/net.h>
#include <iprt/param.h>
#include <iprt/path.h>
#include <iprt/stream.h>
#include <iprt/time.h>
#include <iprt/string.h>
#include "../NetLib/shared_ptr.h"
#include <vector>
#include <list>
#include <string>
#include <map>
#include <VBox/sup.h>
#include <VBox/intnet.h>
#define BASE_SERVICES_ONLY
#include "../NetLib/VBoxNetBaseService.h"
#include "Config.h"
#include "ClientDataInt.h"
/**
* The client is requesting an offer.
*
* @returns true.
*
* @param pDhcpMsg The message.
* @param cb The message size.
*/
bool NetworkManager::handleDhcpReqDiscover(PCRTNETBOOTP pDhcpMsg, size_t cb)
{
RawOption opt;
RT_ZERO(opt);
/* 1. Find client */
ConfigurationManager *confManager = ConfigurationManager::getConfigurationManager();
Client client = confManager->getClientByDhcpPacket(pDhcpMsg, cb);
/* 2. Find/Bind lease for client */
Lease lease = confManager->allocateLease4Client(client, pDhcpMsg, cb);
AssertReturn(lease != Lease::NullLease, VINF_SUCCESS);
int rc = ConfigurationManager::extractRequestList(pDhcpMsg, cb, opt);
NOREF(rc); /** @todo check */
/* 3. Send of offer */
lease.bindingPhase(true);
lease.phaseStart(RTTimeMilliTS());
lease.setExpiration(300); /* 3 min. */
offer4Client(client, pDhcpMsg->bp_xid, opt.au8RawOpt, opt.cbRawOpt);
return true;
}
/**
* The client is requesting an offer.
*
* @returns true.
*
* @param pDhcpMsg The message.
* @param cb The message size.
*/
bool NetworkManager::handleDhcpReqRequest(PCRTNETBOOTP pDhcpMsg, size_t cb)
{
ConfigurationManager *confManager = ConfigurationManager::getConfigurationManager();
/* 1. find client */
Client client = confManager->getClientByDhcpPacket(pDhcpMsg, cb);
/* 2. find bound lease */
Lease l = client.lease();
if (l != Lease::NullLease)
{
if (l.isExpired())
{
/* send client to INIT state */
Client c(client);
nak(client, pDhcpMsg->bp_xid);
confManager->expireLease4Client(c);
return true;
}
/* XXX: Validate request */
RawOption opt;
RT_ZERO(opt);
Client c(client);
int rc = confManager->commitLease4Client(c);
AssertRCReturn(rc, false);
rc = ConfigurationManager::extractRequestList(pDhcpMsg, cb, opt);
AssertRCReturn(rc, false);
ack(client, pDhcpMsg->bp_xid, opt.au8RawOpt, opt.cbRawOpt);
}
else
{
nak(client, pDhcpMsg->bp_xid);
}
return true;
}
/**
* The client is declining an offer we've made.
*
* @returns true.
*
* @param pDhcpMsg The message.
* @param cb The message size.
*/
bool NetworkManager::handleDhcpReqDecline(PCRTNETBOOTP, size_t)
{
/** @todo Probably need to match the server IP here to work correctly with
* other servers. */
/*
* The client is supposed to pass us option 50, requested address,
* from the offer. We also match the lease state. Apparently the
* MAC address is not supposed to be checked here.
*/
/** @todo this is not required in the initial implementation, do it later. */
return true;
}
/**
* The client is releasing its lease - good boy.
*
* @returns true.
*
* @param pDhcpMsg The message.
* @param cb The message size.
*/
bool NetworkManager::handleDhcpReqRelease(PCRTNETBOOTP, size_t)
{
/** @todo Probably need to match the server IP here to work correctly with
* other servers. */
/*
* The client may pass us option 61, client identifier, which we should
* use to find the lease by.
*
* We're matching MAC address and lease state as well.
*/
/*
* If no client identifier or if we couldn't find a lease by using it,
* we will try look it up by the client IP address.
*/
/*
* If found, release it.
*/
/** @todo this is not required in the initial implementation, do it later. */
return true;
}
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