| /* |
| * Copyright (C) 2015 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.net.netlink; |
| |
| import android.net.netlink.NetlinkConstants; |
| import android.net.netlink.NetlinkMessage; |
| import android.net.netlink.RtNetlinkNeighborMessage; |
| import android.net.netlink.StructNdMsg; |
| import android.net.netlink.StructNlMsgHdr; |
| import android.test.suitebuilder.annotation.SmallTest; |
| import android.system.OsConstants; |
| import android.util.Log; |
| import libcore.util.HexEncoding; |
| |
| import java.net.Inet4Address; |
| import java.net.InetAddress; |
| import java.net.UnknownHostException; |
| import java.nio.ByteBuffer; |
| import java.nio.ByteOrder; |
| import java.util.Arrays; |
| import junit.framework.TestCase; |
| |
| |
| public class RtNetlinkNeighborMessageTest extends TestCase { |
| private final String TAG = "RtNetlinkNeighborMessageTest"; |
| |
| // Hexadecimal representation of packet capture. |
| public static final String RTM_DELNEIGH_HEX = |
| // struct nlmsghdr |
| "4c000000" + // length = 76 |
| "1d00" + // type = 29 (RTM_DELNEIGH) |
| "0000" + // flags |
| "00000000" + // seqno |
| "00000000" + // pid (0 == kernel) |
| // struct ndmsg |
| "02" + // family |
| "00" + // pad1 |
| "0000" + // pad2 |
| "15000000" + // interface index (21 == wlan0, on test device) |
| "0400" + // NUD state (0x04 == NUD_STALE) |
| "00" + // flags |
| "01" + // type |
| // struct nlattr: NDA_DST |
| "0800" + // length = 8 |
| "0100" + // type (1 == NDA_DST, for neighbor messages) |
| "c0a89ffe" + // IPv4 address (== 192.168.159.254) |
| // struct nlattr: NDA_LLADDR |
| "0a00" + // length = 10 |
| "0200" + // type (2 == NDA_LLADDR, for neighbor messages) |
| "00005e000164" + // MAC Address (== 00:00:5e:00:01:64) |
| "0000" + // padding, for 4 byte alignment |
| // struct nlattr: NDA_PROBES |
| "0800" + // length = 8 |
| "0400" + // type (4 == NDA_PROBES, for neighbor messages) |
| "01000000" + // number of probes |
| // struct nlattr: NDA_CACHEINFO |
| "1400" + // length = 20 |
| "0300" + // type (3 == NDA_CACHEINFO, for neighbor messages) |
| "05190000" + // ndm_used, as "clock ticks ago" |
| "05190000" + // ndm_confirmed, as "clock ticks ago" |
| "190d0000" + // ndm_updated, as "clock ticks ago" |
| "00000000"; // ndm_refcnt |
| public static final byte[] RTM_DELNEIGH = |
| HexEncoding.decode(RTM_DELNEIGH_HEX.toCharArray(), false); |
| |
| // Hexadecimal representation of packet capture. |
| public static final String RTM_NEWNEIGH_HEX = |
| // struct nlmsghdr |
| "58000000" + // length = 88 |
| "1c00" + // type = 28 (RTM_NEWNEIGH) |
| "0000" + // flags |
| "00000000" + // seqno |
| "00000000" + // pid (0 == kernel) |
| // struct ndmsg |
| "0a" + // family |
| "00" + // pad1 |
| "0000" + // pad2 |
| "15000000" + // interface index (21 == wlan0, on test device) |
| "0400" + // NUD state (0x04 == NUD_STALE) |
| "80" + // flags |
| "01" + // type |
| // struct nlattr: NDA_DST |
| "1400" + // length = 20 |
| "0100" + // type (1 == NDA_DST, for neighbor messages) |
| "fe8000000000000086c9b2fffe6aed4b" + // IPv6 address (== fe80::86c9:b2ff:fe6a:ed4b) |
| // struct nlattr: NDA_LLADDR |
| "0a00" + // length = 10 |
| "0200" + // type (2 == NDA_LLADDR, for neighbor messages) |
| "84c9b26aed4b" + // MAC Address (== 84:c9:b2:6a:ed:4b) |
| "0000" + // padding, for 4 byte alignment |
| // struct nlattr: NDA_PROBES |
| "0800" + // length = 8 |
| "0400" + // type (4 == NDA_PROBES, for neighbor messages) |
| "01000000" + // number of probes |
| // struct nlattr: NDA_CACHEINFO |
| "1400" + // length = 20 |
| "0300" + // type (3 == NDA_CACHEINFO, for neighbor messages) |
| "eb0e0000" + // ndm_used, as "clock ticks ago" |
| "861f0000" + // ndm_confirmed, as "clock ticks ago" |
| "00000000" + // ndm_updated, as "clock ticks ago" |
| "05000000"; // ndm_refcnt |
| public static final byte[] RTM_NEWNEIGH = |
| HexEncoding.decode(RTM_NEWNEIGH_HEX.toCharArray(), false); |
| |
| // An example of the full response from an RTM_GETNEIGH query. |
| private static final String RTM_GETNEIGH_RESPONSE_HEX = |
| // <-- struct nlmsghr -->|<-- struct ndmsg -->|<-- struct nlattr: NDA_DST -->|<-- NDA_LLADDR -->|<-- NDA_PROBES -->|<-- NDA_CACHEINFO -->| |
| "58000000 1c00 0200 00000000 3e2b0000 0a 00 0000 15000000 4000 00 05 1400 0100 ff020000000000000000000000000001 0a00 0200 333300000001 0000 0800 0400 00000000 1400 0300 a2280000 32110000 32110000 01000000" + |
| "58000000 1c00 0200 00000000 3e2b0000 0a 00 0000 15000000 4000 00 05 1400 0100 ff0200000000000000000001ff000001 0a00 0200 3333ff000001 0000 0800 0400 00000000 1400 0300 0d280000 9d100000 9d100000 00000000" + |
| "58000000 1c00 0200 00000000 3e2b0000 0a 00 0000 15000000 0400 80 01 1400 0100 20010db800040ca00000000000000001 0a00 0200 84c9b26aed4b 0000 0800 0400 04000000 1400 0300 90100000 90100000 90080000 01000000" + |
| "58000000 1c00 0200 00000000 3e2b0000 0a 00 0000 15000000 4000 00 05 1400 0100 ff0200000000000000000001ff47da19 0a00 0200 3333ff47da19 0000 0800 0400 00000000 1400 0300 a1280000 31110000 31110000 01000000" + |
| "58000000 1c00 0200 00000000 3e2b0000 0a 00 0000 14000000 4000 00 05 1400 0100 ff020000000000000000000000000016 0a00 0200 333300000016 0000 0800 0400 00000000 1400 0300 912a0000 21130000 21130000 00000000" + |
| "58000000 1c00 0200 00000000 3e2b0000 0a 00 0000 14000000 4000 00 05 1400 0100 ff0200000000000000000001ffeace3b 0a00 0200 3333ffeace3b 0000 0800 0400 00000000 1400 0300 922a0000 22130000 22130000 00000000" + |
| "58000000 1c00 0200 00000000 3e2b0000 0a 00 0000 15000000 4000 00 05 1400 0100 ff0200000000000000000001ff5c2a83 0a00 0200 3333ff5c2a83 0000 0800 0400 00000000 1400 0300 391c0000 c9040000 c9040000 01000000" + |
| "58000000 1c00 0200 00000000 3e2b0000 0a 00 0000 01000000 4000 00 02 1400 0100 00000000000000000000000000000000 0a00 0200 000000000000 0000 0800 0400 00000000 1400 0300 cd180200 5d010200 5d010200 08000000" + |
| "58000000 1c00 0200 00000000 3e2b0000 0a 00 0000 15000000 4000 00 05 1400 0100 ff020000000000000000000000000002 0a00 0200 333300000002 0000 0800 0400 00000000 1400 0300 352a0000 c5120000 c5120000 00000000" + |
| "58000000 1c00 0200 00000000 3e2b0000 0a 00 0000 15000000 4000 00 05 1400 0100 ff020000000000000000000000000016 0a00 0200 333300000016 0000 0800 0400 00000000 1400 0300 982a0000 28130000 28130000 00000000" + |
| "58000000 1c00 0200 00000000 3e2b0000 0a 00 0000 15000000 0800 80 01 1400 0100 fe8000000000000086c9b2fffe6aed4b 0a00 0200 84c9b26aed4b 0000 0800 0400 00000000 1400 0300 23000000 24000000 57000000 13000000" + |
| "58000000 1c00 0200 00000000 3e2b0000 0a 00 0000 15000000 4000 00 05 1400 0100 ff0200000000000000000001ffeace3b 0a00 0200 3333ffeace3b 0000 0800 0400 00000000 1400 0300 992a0000 29130000 29130000 01000000" + |
| "58000000 1c00 0200 00000000 3e2b0000 0a 00 0000 14000000 4000 00 05 1400 0100 ff020000000000000000000000000002 0a00 0200 333300000002 0000 0800 0400 00000000 1400 0300 2e2a0000 be120000 be120000 00000000" + |
| "44000000 1c00 0200 00000000 3e2b0000 02 00 0000 18000000 4000 00 03 0800 0100 00000000 0400 0200 0800 0400 00000000 1400 0300 75280000 05110000 05110000 22000000"; |
| public static final byte[] RTM_GETNEIGH_RESPONSE = |
| HexEncoding.decode(RTM_GETNEIGH_RESPONSE_HEX.replaceAll(" ", "").toCharArray(), false); |
| |
| @SmallTest |
| public void testParseRtmDelNeigh() { |
| final ByteBuffer byteBuffer = ByteBuffer.wrap(RTM_DELNEIGH); |
| byteBuffer.order(ByteOrder.LITTLE_ENDIAN); // For testing. |
| final NetlinkMessage msg = NetlinkMessage.parse(byteBuffer); |
| assertNotNull(msg); |
| assertTrue(msg instanceof RtNetlinkNeighborMessage); |
| final RtNetlinkNeighborMessage neighMsg = (RtNetlinkNeighborMessage) msg; |
| |
| final StructNlMsgHdr hdr = neighMsg.getHeader(); |
| assertNotNull(hdr); |
| assertEquals(76, hdr.nlmsg_len); |
| assertEquals(NetlinkConstants.RTM_DELNEIGH, hdr.nlmsg_type); |
| assertEquals(0, hdr.nlmsg_flags); |
| assertEquals(0, hdr.nlmsg_seq); |
| assertEquals(0, hdr.nlmsg_pid); |
| |
| final StructNdMsg ndmsgHdr = neighMsg.getNdHeader(); |
| assertNotNull(ndmsgHdr); |
| assertEquals((byte) OsConstants.AF_INET, ndmsgHdr.ndm_family); |
| assertEquals(21, ndmsgHdr.ndm_ifindex); |
| assertEquals(StructNdMsg.NUD_STALE, ndmsgHdr.ndm_state); |
| final InetAddress destination = neighMsg.getDestination(); |
| assertNotNull(destination); |
| assertEquals(InetAddress.parseNumericAddress("192.168.159.254"), destination); |
| } |
| |
| @SmallTest |
| public void testParseRtmNewNeigh() { |
| final ByteBuffer byteBuffer = ByteBuffer.wrap(RTM_NEWNEIGH); |
| byteBuffer.order(ByteOrder.LITTLE_ENDIAN); // For testing. |
| final NetlinkMessage msg = NetlinkMessage.parse(byteBuffer); |
| assertNotNull(msg); |
| assertTrue(msg instanceof RtNetlinkNeighborMessage); |
| final RtNetlinkNeighborMessage neighMsg = (RtNetlinkNeighborMessage) msg; |
| |
| final StructNlMsgHdr hdr = neighMsg.getHeader(); |
| assertNotNull(hdr); |
| assertEquals(88, hdr.nlmsg_len); |
| assertEquals(NetlinkConstants.RTM_NEWNEIGH, hdr.nlmsg_type); |
| assertEquals(0, hdr.nlmsg_flags); |
| assertEquals(0, hdr.nlmsg_seq); |
| assertEquals(0, hdr.nlmsg_pid); |
| |
| final StructNdMsg ndmsgHdr = neighMsg.getNdHeader(); |
| assertNotNull(ndmsgHdr); |
| assertEquals((byte) OsConstants.AF_INET6, ndmsgHdr.ndm_family); |
| assertEquals(21, ndmsgHdr.ndm_ifindex); |
| assertEquals(StructNdMsg.NUD_STALE, ndmsgHdr.ndm_state); |
| final InetAddress destination = neighMsg.getDestination(); |
| assertNotNull(destination); |
| assertEquals(InetAddress.parseNumericAddress("fe80::86c9:b2ff:fe6a:ed4b"), destination); |
| } |
| |
| @SmallTest |
| public void testParseRtmGetNeighResponse() { |
| final ByteBuffer byteBuffer = ByteBuffer.wrap(RTM_GETNEIGH_RESPONSE); |
| byteBuffer.order(ByteOrder.LITTLE_ENDIAN); // For testing. |
| |
| int messageCount = 0; |
| while (byteBuffer.remaining() > 0) { |
| final NetlinkMessage msg = NetlinkMessage.parse(byteBuffer); |
| assertNotNull(msg); |
| assertTrue(msg instanceof RtNetlinkNeighborMessage); |
| final RtNetlinkNeighborMessage neighMsg = (RtNetlinkNeighborMessage) msg; |
| |
| final StructNlMsgHdr hdr = neighMsg.getHeader(); |
| assertNotNull(hdr); |
| assertEquals(NetlinkConstants.RTM_NEWNEIGH, hdr.nlmsg_type); |
| assertEquals(StructNlMsgHdr.NLM_F_MULTI, hdr.nlmsg_flags); |
| assertEquals(0, hdr.nlmsg_seq); |
| assertEquals(11070, hdr.nlmsg_pid); |
| |
| messageCount++; |
| } |
| // TODO: add more detailed spot checks. |
| assertEquals(14, messageCount); |
| } |
| |
| @SmallTest |
| public void testCreateRtmNewNeighMessage() { |
| final int seqNo = 2635; |
| final int ifIndex = 14; |
| final byte[] llAddr = |
| new byte[] { (byte) 1, (byte) 2, (byte) 3, (byte) 4, (byte) 5, (byte) 6 }; |
| |
| // Hexadecimal representation of our created packet. |
| final String expectedNewNeighHex = |
| // struct nlmsghdr |
| "30000000" + // length = 48 |
| "1c00" + // type = 28 (RTM_NEWNEIGH) |
| "0501" + // flags (NLM_F_REQUEST | NLM_F_ACK | NLM_F_REPLACE) |
| "4b0a0000" + // seqno |
| "00000000" + // pid (0 == kernel) |
| // struct ndmsg |
| "02" + // family |
| "00" + // pad1 |
| "0000" + // pad2 |
| "0e000000" + // interface index (14) |
| "0800" + // NUD state (0x08 == NUD_DELAY) |
| "00" + // flags |
| "00" + // type |
| // struct nlattr: NDA_DST |
| "0800" + // length = 8 |
| "0100" + // type (1 == NDA_DST, for neighbor messages) |
| "7f000001" + // IPv4 address (== 127.0.0.1) |
| // struct nlattr: NDA_LLADDR |
| "0a00" + // length = 10 |
| "0200" + // type (2 == NDA_LLADDR, for neighbor messages) |
| "010203040506" + // MAC Address (== 01:02:03:04:05:06) |
| "0000"; // padding, for 4 byte alignment |
| final byte[] expectedNewNeigh = |
| HexEncoding.decode(expectedNewNeighHex.toCharArray(), false); |
| |
| final byte[] bytes = RtNetlinkNeighborMessage.newNewNeighborMessage( |
| seqNo, Inet4Address.LOOPBACK, StructNdMsg.NUD_DELAY, ifIndex, llAddr); |
| if (!Arrays.equals(expectedNewNeigh, bytes)) { |
| assertEquals(expectedNewNeigh.length, bytes.length); |
| for (int i = 0; i < Math.min(expectedNewNeigh.length, bytes.length); i++) { |
| assertEquals(expectedNewNeigh[i], bytes[i]); |
| } |
| } |
| } |
| } |
