Harshada Chaundkar | dcd1b14 | 2019-03-25 17:27:44 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2019-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 | package org.onosproject.net.packet.packetfilter; |
| 17 | |
| 18 | import org.onlab.packet.DHCP; |
| 19 | import org.onlab.packet.Ethernet; |
| 20 | import org.onlab.packet.IPv4; |
| 21 | import org.onlab.packet.UDP; |
| 22 | import org.onosproject.net.packet.PacketContext; |
| 23 | import org.onosproject.net.packet.PacketInClassifier; |
| 24 | |
| 25 | public class DhcpPacketClassifier implements PacketInClassifier { |
| 26 | |
| 27 | @Override |
| 28 | public boolean match(PacketContext packet) { |
| 29 | |
| 30 | Ethernet eth = packet.inPacket().parsed(); |
| 31 | |
| 32 | if (eth.getEtherType() == Ethernet.TYPE_IPV4) { |
| 33 | IPv4 ipv4Packet = (IPv4) eth.getPayload(); |
| 34 | |
| 35 | if (ipv4Packet.getProtocol() == IPv4.PROTOCOL_UDP) { |
| 36 | UDP udpPacket = (UDP) ipv4Packet.getPayload(); |
| 37 | |
| 38 | if (udpPacket.getDestinationPort() == UDP.DHCP_SERVER_PORT && |
| 39 | udpPacket.getSourcePort() == UDP.DHCP_CLIENT_PORT) { |
| 40 | DHCP dhcp = (DHCP) udpPacket.getPayload(); |
| 41 | if (dhcp.getPacketType() == DHCP.MsgType.DHCPDISCOVER) { |
| 42 | return true; |
| 43 | } |
| 44 | } |
| 45 | } |
| 46 | } |
| 47 | return false; |
| 48 | } |
| 49 | |
| 50 | |
| 51 | } |