Amit Ghosh | 8951f04 | 2017-08-10 13:48:10 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2017-present Open Networking Foundation |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package org.opencord.dhcpl2relay; |
| 18 | |
| 19 | import org.onlab.packet.BasePacket; |
| 20 | import org.onlab.packet.DHCP; |
| 21 | import org.onlab.packet.DHCPOption; |
| 22 | import org.onlab.packet.DHCPPacketType; |
| 23 | import org.onlab.packet.Ethernet; |
| 24 | import org.onlab.packet.IPv4; |
| 25 | import org.onlab.packet.Ip4Address; |
| 26 | import org.onlab.packet.MacAddress; |
| 27 | import org.onlab.packet.UDP; |
| 28 | import org.onosproject.net.ConnectPoint; |
| 29 | import org.onosproject.net.packet.DefaultInboundPacket; |
| 30 | import org.onosproject.net.packet.DefaultPacketContext; |
| 31 | import org.onosproject.net.packet.InboundPacket; |
| 32 | import org.onosproject.net.packet.OutboundPacket; |
| 33 | import org.onosproject.net.packet.PacketContext; |
| 34 | import org.onosproject.net.packet.PacketProcessor; |
| 35 | import org.onosproject.net.packet.PacketServiceAdapter; |
| 36 | |
| 37 | import org.opencord.dhcpl2relay.packet.DhcpEthernet; |
| 38 | |
| 39 | import org.slf4j.Logger; |
| 40 | import org.slf4j.LoggerFactory; |
| 41 | |
| 42 | import java.nio.ByteBuffer; |
| 43 | import java.nio.charset.StandardCharsets; |
| 44 | |
| 45 | import java.util.ArrayList; |
| 46 | import java.util.LinkedList; |
| 47 | import java.util.List; |
| 48 | |
| 49 | import static org.junit.Assert.fail; |
| 50 | |
| 51 | |
| 52 | /** |
| 53 | * Common methods for AAA app testing. |
| 54 | */ |
| 55 | public class DhcpL2RelayTestBase { |
| 56 | private final Logger log = LoggerFactory.getLogger(getClass()); |
| 57 | |
| 58 | private static final int TRANSACTION_ID = 1000; |
| 59 | |
| 60 | private static final String EXPECTED_IP = "10.2.0.2"; |
| 61 | |
| 62 | List<BasePacket> savedPackets = new LinkedList<>(); |
| 63 | PacketProcessor packetProcessor; |
| 64 | |
| 65 | |
| 66 | /** |
| 67 | * Saves the given packet onto the saved packets list. |
| 68 | * |
| 69 | * @param packet packet to save |
| 70 | */ |
| 71 | void savePacket(BasePacket packet) { |
| 72 | savedPackets.add(packet); |
| 73 | } |
| 74 | |
| 75 | BasePacket getPacket() { |
| 76 | return savedPackets.remove(0); |
| 77 | } |
| 78 | |
| 79 | /** |
| 80 | * Keeps a reference to the PacketProcessor and saves the OutboundPackets. |
| 81 | */ |
| 82 | class MockPacketService extends PacketServiceAdapter { |
| 83 | |
| 84 | @Override |
| 85 | public void addProcessor(PacketProcessor processor, int priority) { |
| 86 | packetProcessor = processor; |
| 87 | } |
| 88 | |
| 89 | @Override |
| 90 | public void emit(OutboundPacket packet) { |
| 91 | try { |
| 92 | DhcpEthernet eth = DhcpEthernet.deserializer().deserialize(packet.data().array(), |
| 93 | 0, packet.data().array().length); |
| 94 | savePacket(eth); |
| 95 | } catch (Exception e) { |
| 96 | fail(e.getMessage()); |
| 97 | } |
| 98 | } |
| 99 | } |
| 100 | |
| 101 | /** |
| 102 | * Mocks the DefaultPacketContext. |
| 103 | */ |
| 104 | final class TestPacketContext extends DefaultPacketContext { |
| 105 | |
| 106 | private TestPacketContext(long time, InboundPacket inPkt, |
| 107 | OutboundPacket outPkt, boolean block) { |
| 108 | super(time, inPkt, outPkt, block); |
| 109 | } |
| 110 | |
| 111 | @Override |
| 112 | public void send() { |
| 113 | // We don't send anything out. |
| 114 | } |
| 115 | } |
| 116 | |
| 117 | /** |
| 118 | * Sends an Ethernet packet to the process method of the Packet Processor. |
| 119 | * |
| 120 | * @param pkt Ethernet packet |
| 121 | */ |
| 122 | void sendPacket(DhcpEthernet pkt, ConnectPoint cp) { |
| 123 | final ByteBuffer byteBuffer = ByteBuffer.wrap(pkt.serialize()); |
| 124 | InboundPacket inPacket = new DefaultInboundPacket(cp, null, byteBuffer); |
| 125 | |
| 126 | PacketContext context = new TestPacketContext(127L, inPacket, null, false); |
| 127 | packetProcessor.process(context); |
| 128 | } |
| 129 | |
| 130 | /** |
| 131 | * Constructs an Ethernet packet with IP/UDP/DHCP payload. |
| 132 | * |
| 133 | * @return Ethernet packet |
| 134 | */ |
| 135 | private DhcpEthernet construcEthernetPacket(MacAddress srcMac, MacAddress dstMac, |
| 136 | String dstIp, byte dhcpReqRsp, |
| 137 | MacAddress clientHwAddress, |
| 138 | Ip4Address dhcpClientIpAddress) { |
| 139 | // Ethernet Frame. |
| 140 | DhcpEthernet ethPkt = new DhcpEthernet(); |
| 141 | ethPkt.setSourceMacAddress(srcMac); |
| 142 | ethPkt.setDestinationMacAddress(dstMac); |
| 143 | ethPkt.setEtherType(Ethernet.TYPE_IPV4); |
| 144 | ethPkt.setVlanID((short) 2); |
| 145 | ethPkt.setPriorityCode((byte) 6); |
| 146 | |
| 147 | // IP Packet |
| 148 | IPv4 ipv4Reply = new IPv4(); |
| 149 | ipv4Reply.setSourceAddress(0); |
| 150 | ipv4Reply.setDestinationAddress(dstIp); |
| 151 | |
| 152 | ipv4Reply.setTtl((byte) 127); |
| 153 | |
| 154 | // UDP Datagram. |
| 155 | UDP udpReply = new UDP(); |
| 156 | udpReply.setSourcePort((byte) UDP.DHCP_CLIENT_PORT); |
| 157 | udpReply.setDestinationPort((byte) UDP.DHCP_SERVER_PORT); |
| 158 | |
| 159 | // DHCP Payload. |
| 160 | DHCP dhcpReply = new DHCP(); |
| 161 | dhcpReply.setOpCode(dhcpReqRsp); |
| 162 | |
| 163 | dhcpReply.setYourIPAddress(dhcpClientIpAddress.toInt()); |
| 164 | dhcpReply.setServerIPAddress(0); |
| 165 | |
| 166 | final byte[] serverNameBytes = new byte[64]; |
| 167 | String result = new String(serverNameBytes, StandardCharsets.US_ASCII).trim(); |
| 168 | dhcpReply.setServerName(result); |
| 169 | |
| 170 | final byte[] bootFileBytes = new byte[128]; |
| 171 | String result1 = new String(bootFileBytes, StandardCharsets.US_ASCII).trim(); |
| 172 | dhcpReply.setBootFileName(result1); |
| 173 | |
| 174 | dhcpReply.setTransactionId(TRANSACTION_ID); |
| 175 | dhcpReply.setClientHardwareAddress(clientHwAddress.toBytes()); |
| 176 | dhcpReply.setHardwareType(DHCP.HWTYPE_ETHERNET); |
| 177 | dhcpReply.setHardwareAddressLength((byte) 6); |
| 178 | |
| 179 | udpReply.setPayload(dhcpReply); |
| 180 | ipv4Reply.setPayload(udpReply); |
| 181 | ethPkt.setPayload(ipv4Reply); |
| 182 | |
| 183 | return ethPkt; |
| 184 | } |
| 185 | |
| 186 | /** |
| 187 | * Constructs DHCP Discover Packet. |
| 188 | * |
| 189 | * @return Ethernet packet |
| 190 | */ |
| 191 | DhcpEthernet constructDhcpDiscoverPacket(MacAddress clientMac) { |
| 192 | |
| 193 | DhcpEthernet pkt = construcEthernetPacket(clientMac, MacAddress.BROADCAST, |
| 194 | "255.255.255.255", DHCP.OPCODE_REQUEST, MacAddress.NONE, |
| 195 | Ip4Address.valueOf("0.0.0.0")); |
| 196 | |
| 197 | IPv4 ipv4Packet = (IPv4) pkt.getPayload(); |
| 198 | UDP udpPacket = (UDP) ipv4Packet.getPayload(); |
| 199 | DHCP dhcpPacket = (DHCP) udpPacket.getPayload(); |
| 200 | |
| 201 | dhcpPacket.setOptions(constructDhcpOptions(DHCPPacketType.DHCPDISCOVER)); |
| 202 | |
| 203 | return pkt; |
| 204 | } |
| 205 | |
| 206 | /** |
| 207 | * Constructs DHCP Request Packet. |
| 208 | * |
| 209 | * @return Ethernet packet |
| 210 | */ |
| 211 | DhcpEthernet constructDhcpRequestPacket(MacAddress clientMac) { |
| 212 | |
| 213 | DhcpEthernet pkt = construcEthernetPacket(clientMac, MacAddress.BROADCAST, |
| 214 | "255.255.255.255", DHCP.OPCODE_REQUEST, MacAddress.NONE, |
| 215 | Ip4Address.valueOf("0.0.0.0")); |
| 216 | |
| 217 | IPv4 ipv4Packet = (IPv4) pkt.getPayload(); |
| 218 | UDP udpPacket = (UDP) ipv4Packet.getPayload(); |
| 219 | DHCP dhcpPacket = (DHCP) udpPacket.getPayload(); |
| 220 | |
| 221 | dhcpPacket.setOptions(constructDhcpOptions(DHCPPacketType.DHCPREQUEST)); |
| 222 | |
| 223 | return pkt; |
| 224 | } |
| 225 | |
| 226 | /** |
| 227 | * Constructs DHCP Offer Packet. |
| 228 | * |
| 229 | * @return Ethernet packet |
| 230 | */ |
| 231 | DhcpEthernet constructDhcpOfferPacket(MacAddress servMac, MacAddress clientMac, |
| 232 | String ipAddress, String dhcpClientIpAddress) { |
| 233 | |
| 234 | DhcpEthernet pkt = construcEthernetPacket(servMac, clientMac, ipAddress, DHCP.OPCODE_REPLY, |
| 235 | clientMac, Ip4Address.valueOf(dhcpClientIpAddress)); |
| 236 | |
| 237 | IPv4 ipv4Packet = (IPv4) pkt.getPayload(); |
| 238 | UDP udpPacket = (UDP) ipv4Packet.getPayload(); |
| 239 | DHCP dhcpPacket = (DHCP) udpPacket.getPayload(); |
| 240 | |
| 241 | dhcpPacket.setOptions(constructDhcpOptions(DHCPPacketType.DHCPOFFER)); |
| 242 | |
| 243 | return pkt; |
| 244 | } |
| 245 | |
| 246 | /** |
| 247 | * Constructs DHCP Ack Packet. |
| 248 | * |
| 249 | * @return Ethernet packet |
| 250 | */ |
| 251 | DhcpEthernet constructDhcpAckPacket(MacAddress servMac, MacAddress clientMac, |
| 252 | String ipAddress, String dhcpClientIpAddress) { |
| 253 | |
| 254 | DhcpEthernet pkt = construcEthernetPacket(servMac, clientMac, ipAddress, DHCP.OPCODE_REPLY, |
| 255 | clientMac, Ip4Address.valueOf(dhcpClientIpAddress)); |
| 256 | |
| 257 | IPv4 ipv4Packet = (IPv4) pkt.getPayload(); |
| 258 | UDP udpPacket = (UDP) ipv4Packet.getPayload(); |
| 259 | DHCP dhcpPacket = (DHCP) udpPacket.getPayload(); |
| 260 | |
| 261 | dhcpPacket.setOptions(constructDhcpOptions(DHCPPacketType.DHCPACK)); |
| 262 | |
| 263 | return pkt; |
| 264 | } |
| 265 | |
| 266 | /** |
| 267 | * Constructs DHCP Discover Options. |
| 268 | * |
| 269 | * @return Ethernet packet |
| 270 | */ |
| 271 | private List<DHCPOption> constructDhcpOptions(DHCPPacketType packetType) { |
| 272 | |
| 273 | // DHCP Options. |
| 274 | DHCPOption option = new DHCPOption(); |
| 275 | List<DHCPOption> optionList = new ArrayList<>(); |
| 276 | |
| 277 | |
| 278 | // DHCP Message Type. |
| 279 | option.setCode(DHCP.DHCPOptionCode.OptionCode_MessageType.getValue()); |
| 280 | option.setLength((byte) 1); |
| 281 | byte[] optionData = {(byte) packetType.getValue()}; |
| 282 | option.setData(optionData); |
| 283 | optionList.add(option); |
| 284 | |
| 285 | // DHCP Requested IP. |
| 286 | option = new DHCPOption(); |
| 287 | option.setCode(DHCP.DHCPOptionCode.OptionCode_RequestedIP.getValue()); |
| 288 | option.setLength((byte) 4); |
| 289 | optionData = Ip4Address.valueOf(EXPECTED_IP).toOctets(); |
| 290 | option.setData(optionData); |
| 291 | optionList.add(option); |
| 292 | |
| 293 | // End Option. |
| 294 | option = new DHCPOption(); |
| 295 | option.setCode(DHCP.DHCPOptionCode.OptionCode_END.getValue()); |
| 296 | option.setLength((byte) 1); |
| 297 | optionList.add(option); |
| 298 | |
| 299 | return optionList; |
| 300 | } |
| 301 | } |