1 | /* $Id: NetworkManagerDhcp.cpp 63266 2016-08-10 13:21:48Z vboxsync $ */
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2 | /** @file
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3 | * NetworkManagerDhcp - Network Manager part handling Dhcp.
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4 | */
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5 |
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6 | /*
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7 | * Copyright (C) 2013-2016 Oracle Corporation
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8 | *
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9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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10 | * available from http://www.virtualbox.org. This file is free software;
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11 | * you can redistribute it and/or modify it under the terms of the GNU
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12 | * General Public License (GPL) as published by the Free Software
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13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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16 | */
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17 |
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18 |
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19 | /*********************************************************************************************************************************
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20 | * Header Files *
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21 | *********************************************************************************************************************************/
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22 | #include <iprt/asm.h>
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23 | #include <iprt/cdefs.h>
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24 | #include <iprt/getopt.h>
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25 | #include <iprt/net.h>
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26 | #include <iprt/param.h>
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27 | #include <iprt/path.h>
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28 | #include <iprt/stream.h>
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29 | #include <iprt/time.h>
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30 | #include <iprt/string.h>
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31 |
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32 | #include "../NetLib/shared_ptr.h"
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33 |
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34 | #include <vector>
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35 | #include <list>
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36 | #include <string>
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37 | #include <map>
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38 |
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39 | #include <VBox/sup.h>
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40 | #include <VBox/intnet.h>
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41 |
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42 | #define BASE_SERVICES_ONLY
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43 | #include "../NetLib/VBoxNetBaseService.h"
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44 | #include "Config.h"
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45 | #include "ClientDataInt.h"
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46 |
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47 | /**
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48 | * The client is requesting an offer.
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49 | *
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50 | * @returns true.
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51 | *
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52 | * @param pDhcpMsg The message.
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53 | * @param cb The message size.
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54 | */
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55 | bool NetworkManager::handleDhcpReqDiscover(PCRTNETBOOTP pDhcpMsg, size_t cb)
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56 | {
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57 | RawOption opt;
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58 | RT_ZERO(opt);
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59 |
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60 | /* 1. Find client */
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61 | ConfigurationManager *confManager = ConfigurationManager::getConfigurationManager();
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62 | Client client = confManager->getClientByDhcpPacket(pDhcpMsg, cb);
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63 |
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64 | /* 2. Find/Bind lease for client */
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65 | Lease lease = confManager->allocateLease4Client(client, pDhcpMsg, cb);
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66 | AssertReturn(lease != Lease::NullLease, VINF_SUCCESS);
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67 |
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68 | int rc = ConfigurationManager::extractRequestList(pDhcpMsg, cb, opt);
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69 | NOREF(rc); /** @todo check */
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70 |
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71 | /* 3. Send of offer */
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72 |
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73 | lease.bindingPhase(true);
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74 | lease.phaseStart(RTTimeMilliTS());
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75 | lease.setExpiration(300); /* 3 min. */
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76 | offer4Client(client, pDhcpMsg->bp_xid, opt.au8RawOpt, opt.cbRawOpt);
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77 |
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78 | return true;
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79 | }
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80 |
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81 |
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82 | /**
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83 | * The client is requesting an offer.
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84 | *
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85 | * @returns true.
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86 | *
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87 | * @param pDhcpMsg The message.
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88 | * @param cb The message size.
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89 | */
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90 | bool NetworkManager::handleDhcpReqRequest(PCRTNETBOOTP pDhcpMsg, size_t cb)
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91 | {
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92 | ConfigurationManager *confManager = ConfigurationManager::getConfigurationManager();
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93 |
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94 | /* 1. find client */
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95 | Client client = confManager->getClientByDhcpPacket(pDhcpMsg, cb);
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96 |
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97 | /* 2. find bound lease */
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98 | Lease l = client.lease();
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99 | if (l != Lease::NullLease)
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100 | {
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101 |
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102 | if (l.isExpired())
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103 | {
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104 | /* send client to INIT state */
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105 | Client c(client);
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106 | nak(client, pDhcpMsg->bp_xid);
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107 | confManager->expireLease4Client(c);
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108 | return true;
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109 | }
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110 | /* XXX: Validate request */
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111 | RawOption opt;
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112 | RT_ZERO(opt);
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113 |
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114 | Client c(client);
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115 | int rc = confManager->commitLease4Client(c);
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116 | AssertRCReturn(rc, false);
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117 |
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118 | rc = ConfigurationManager::extractRequestList(pDhcpMsg, cb, opt);
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119 | AssertRCReturn(rc, false);
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120 |
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121 | ack(client, pDhcpMsg->bp_xid, opt.au8RawOpt, opt.cbRawOpt);
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122 | }
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123 | else
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124 | {
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125 | nak(client, pDhcpMsg->bp_xid);
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126 | }
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127 | return true;
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128 | }
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129 |
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130 |
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131 | /**
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132 | * The client is declining an offer we've made.
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133 | *
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134 | * @returns true.
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135 | *
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136 | * @param pDhcpMsg The message.
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137 | * @param cb The message size.
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138 | */
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139 | bool NetworkManager::handleDhcpReqDecline(PCRTNETBOOTP, size_t)
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140 | {
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141 | /** @todo Probably need to match the server IP here to work correctly with
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142 | * other servers. */
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143 |
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144 | /*
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145 | * The client is supposed to pass us option 50, requested address,
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146 | * from the offer. We also match the lease state. Apparently the
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147 | * MAC address is not supposed to be checked here.
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148 | */
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149 |
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150 | /** @todo this is not required in the initial implementation, do it later. */
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151 | return true;
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152 | }
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153 |
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154 |
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155 | /**
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156 | * The client is releasing its lease - good boy.
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157 | *
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158 | * @returns true.
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159 | *
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160 | * @param pDhcpMsg The message.
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161 | * @param cb The message size.
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162 | */
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163 | bool NetworkManager::handleDhcpReqRelease(PCRTNETBOOTP, size_t)
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164 | {
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165 | /** @todo Probably need to match the server IP here to work correctly with
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166 | * other servers. */
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167 |
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168 | /*
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169 | * The client may pass us option 61, client identifier, which we should
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170 | * use to find the lease by.
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171 | *
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172 | * We're matching MAC address and lease state as well.
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173 | */
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174 |
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175 | /*
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176 | * If no client identifier or if we couldn't find a lease by using it,
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177 | * we will try look it up by the client IP address.
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178 | */
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179 |
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180 |
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181 | /*
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182 | * If found, release it.
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183 | */
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184 |
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185 |
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186 | /** @todo this is not required in the initial implementation, do it later. */
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187 | return true;
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188 | }
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189 |
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