Lorenzo Colitti | c2abb2b | 2015-03-31 16:26:57 +0900 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2015 The Android Open Source Project |
| 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 android.net.dhcp; |
| 18 | |
| 19 | import android.net.NetworkUtils; |
Lorenzo Colitti | d973537 | 2015-06-02 13:15:50 +0900 | [diff] [blame] | 20 | import android.net.DhcpResults; |
Lorenzo Colitti | f68edb1 | 2015-06-02 17:46:24 +0900 | [diff] [blame] | 21 | import android.net.LinkAddress; |
Lorenzo Colitti | c2abb2b | 2015-03-31 16:26:57 +0900 | [diff] [blame] | 22 | import android.system.OsConstants; |
| 23 | import android.test.suitebuilder.annotation.SmallTest; |
Lorenzo Colitti | f28e62b | 2015-07-27 16:35:22 +0900 | [diff] [blame] | 24 | import com.android.internal.util.HexDump; |
Lorenzo Colitti | c2abb2b | 2015-03-31 16:26:57 +0900 | [diff] [blame] | 25 | |
| 26 | import java.net.Inet4Address; |
| 27 | import java.nio.ByteBuffer; |
Lorenzo Colitti | b0b3d0b | 2015-07-06 12:29:43 +0900 | [diff] [blame] | 28 | import java.util.ArrayList; |
| 29 | |
Lorenzo Colitti | f28e62b | 2015-07-27 16:35:22 +0900 | [diff] [blame] | 30 | import junit.framework.TestCase; |
Lorenzo Colitti | b0b3d0b | 2015-07-06 12:29:43 +0900 | [diff] [blame] | 31 | import libcore.util.HexEncoding; |
Lorenzo Colitti | 6c7acb6 | 2015-06-29 17:10:45 +0900 | [diff] [blame] | 32 | import java.util.Arrays; |
Lorenzo Colitti | c2abb2b | 2015-03-31 16:26:57 +0900 | [diff] [blame] | 33 | |
| 34 | import static android.net.dhcp.DhcpPacket.*; |
| 35 | |
| 36 | |
| 37 | public class DhcpPacketTest extends TestCase { |
| 38 | |
Lorenzo Colitti | b0b3d0b | 2015-07-06 12:29:43 +0900 | [diff] [blame] | 39 | private static Inet4Address SERVER_ADDR = v4Address("192.0.2.1"); |
| 40 | private static Inet4Address CLIENT_ADDR = v4Address("192.0.2.234"); |
Lorenzo Colitti | f68edb1 | 2015-06-02 17:46:24 +0900 | [diff] [blame] | 41 | // Use our own empty address instead of Inet4Address.ANY or INADDR_ANY to ensure that the code |
| 42 | // doesn't use == instead of equals when comparing addresses. |
Lorenzo Colitti | b0b3d0b | 2015-07-06 12:29:43 +0900 | [diff] [blame] | 43 | private static Inet4Address ANY = (Inet4Address) v4Address("0.0.0.0"); |
Lorenzo Colitti | f68edb1 | 2015-06-02 17:46:24 +0900 | [diff] [blame] | 44 | |
Lorenzo Colitti | c2abb2b | 2015-03-31 16:26:57 +0900 | [diff] [blame] | 45 | private static byte[] CLIENT_MAC = new byte[] { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05 }; |
| 46 | |
Lorenzo Colitti | b0b3d0b | 2015-07-06 12:29:43 +0900 | [diff] [blame] | 47 | private static final Inet4Address v4Address(String addrString) throws IllegalArgumentException { |
| 48 | return (Inet4Address) NetworkUtils.numericToInetAddress(addrString); |
| 49 | } |
| 50 | |
Lorenzo Colitti | 6c7acb6 | 2015-06-29 17:10:45 +0900 | [diff] [blame] | 51 | public void setUp() { |
| 52 | DhcpPacket.testOverrideVendorId = "android-dhcp-???"; |
| 53 | DhcpPacket.testOverrideHostname = "android-01234567890abcde"; |
| 54 | } |
| 55 | |
Lorenzo Colitti | c2abb2b | 2015-03-31 16:26:57 +0900 | [diff] [blame] | 56 | class TestDhcpPacket extends DhcpPacket { |
| 57 | private byte mType; |
| 58 | // TODO: Make this a map of option numbers to bytes instead. |
Lorenzo Colitti | f68edb1 | 2015-06-02 17:46:24 +0900 | [diff] [blame] | 59 | private byte[] mDomainBytes, mVendorInfoBytes, mLeaseTimeBytes, mNetmaskBytes; |
Lorenzo Colitti | c2abb2b | 2015-03-31 16:26:57 +0900 | [diff] [blame] | 60 | |
Lorenzo Colitti | f68edb1 | 2015-06-02 17:46:24 +0900 | [diff] [blame] | 61 | public TestDhcpPacket(byte type, Inet4Address clientIp, Inet4Address yourIp) { |
| 62 | super(0xdeadbeef, (short) 0, clientIp, yourIp, INADDR_ANY, INADDR_ANY, |
Lorenzo Colitti | 3e97932 | 2015-04-21 15:22:17 +0900 | [diff] [blame] | 63 | CLIENT_MAC, true); |
Lorenzo Colitti | c2abb2b | 2015-03-31 16:26:57 +0900 | [diff] [blame] | 64 | mType = type; |
Lorenzo Colitti | d973537 | 2015-06-02 13:15:50 +0900 | [diff] [blame] | 65 | } |
| 66 | |
Lorenzo Colitti | f68edb1 | 2015-06-02 17:46:24 +0900 | [diff] [blame] | 67 | public TestDhcpPacket(byte type) { |
| 68 | this(type, INADDR_ANY, CLIENT_ADDR); |
| 69 | } |
| 70 | |
Lorenzo Colitti | d973537 | 2015-06-02 13:15:50 +0900 | [diff] [blame] | 71 | public TestDhcpPacket setDomainBytes(byte[] domainBytes) { |
Lorenzo Colitti | c2abb2b | 2015-03-31 16:26:57 +0900 | [diff] [blame] | 72 | mDomainBytes = domainBytes; |
Lorenzo Colitti | d973537 | 2015-06-02 13:15:50 +0900 | [diff] [blame] | 73 | return this; |
| 74 | } |
| 75 | |
| 76 | public TestDhcpPacket setVendorInfoBytes(byte[] vendorInfoBytes) { |
Lorenzo Colitti | c2abb2b | 2015-03-31 16:26:57 +0900 | [diff] [blame] | 77 | mVendorInfoBytes = vendorInfoBytes; |
Lorenzo Colitti | d973537 | 2015-06-02 13:15:50 +0900 | [diff] [blame] | 78 | return this; |
| 79 | } |
| 80 | |
| 81 | public TestDhcpPacket setLeaseTimeBytes(byte[] leaseTimeBytes) { |
| 82 | mLeaseTimeBytes = leaseTimeBytes; |
| 83 | return this; |
Lorenzo Colitti | c2abb2b | 2015-03-31 16:26:57 +0900 | [diff] [blame] | 84 | } |
| 85 | |
Lorenzo Colitti | f68edb1 | 2015-06-02 17:46:24 +0900 | [diff] [blame] | 86 | public TestDhcpPacket setNetmaskBytes(byte[] netmaskBytes) { |
| 87 | mNetmaskBytes = netmaskBytes; |
| 88 | return this; |
| 89 | } |
| 90 | |
Lorenzo Colitti | c2abb2b | 2015-03-31 16:26:57 +0900 | [diff] [blame] | 91 | public ByteBuffer buildPacket(int encap, short unusedDestUdp, short unusedSrcUdp) { |
| 92 | ByteBuffer result = ByteBuffer.allocate(MAX_LENGTH); |
| 93 | fillInPacket(encap, CLIENT_ADDR, SERVER_ADDR, |
| 94 | DHCP_CLIENT, DHCP_SERVER, result, DHCP_BOOTREPLY, false); |
| 95 | return result; |
| 96 | } |
| 97 | |
| 98 | public void finishPacket(ByteBuffer buffer) { |
| 99 | addTlv(buffer, DHCP_MESSAGE_TYPE, mType); |
| 100 | if (mDomainBytes != null) { |
| 101 | addTlv(buffer, DHCP_DOMAIN_NAME, mDomainBytes); |
| 102 | } |
| 103 | if (mVendorInfoBytes != null) { |
Lorenzo Colitti | b0b3d0b | 2015-07-06 12:29:43 +0900 | [diff] [blame] | 104 | addTlv(buffer, DHCP_VENDOR_INFO, mVendorInfoBytes); |
Lorenzo Colitti | c2abb2b | 2015-03-31 16:26:57 +0900 | [diff] [blame] | 105 | } |
Lorenzo Colitti | d973537 | 2015-06-02 13:15:50 +0900 | [diff] [blame] | 106 | if (mLeaseTimeBytes != null) { |
| 107 | addTlv(buffer, DHCP_LEASE_TIME, mLeaseTimeBytes); |
| 108 | } |
Lorenzo Colitti | f68edb1 | 2015-06-02 17:46:24 +0900 | [diff] [blame] | 109 | if (mNetmaskBytes != null) { |
| 110 | addTlv(buffer, DHCP_SUBNET_MASK, mNetmaskBytes); |
| 111 | } |
Lorenzo Colitti | c2abb2b | 2015-03-31 16:26:57 +0900 | [diff] [blame] | 112 | addTlvEnd(buffer); |
| 113 | } |
| 114 | |
| 115 | // Convenience method. |
| 116 | public ByteBuffer build() { |
| 117 | // ENCAP_BOOTP packets don't contain ports, so just pass in 0. |
| 118 | ByteBuffer pkt = buildPacket(ENCAP_BOOTP, (short) 0, (short) 0); |
| 119 | pkt.flip(); |
| 120 | return pkt; |
| 121 | } |
| 122 | } |
| 123 | |
| 124 | private void assertDomainAndVendorInfoParses( |
| 125 | String expectedDomain, byte[] domainBytes, |
Erik Kline | 496906e | 2015-09-16 15:44:54 +0900 | [diff] [blame] | 126 | String expectedVendorInfo, byte[] vendorInfoBytes) throws Exception { |
Lorenzo Colitti | d973537 | 2015-06-02 13:15:50 +0900 | [diff] [blame] | 127 | ByteBuffer packet = new TestDhcpPacket(DHCP_MESSAGE_TYPE_OFFER) |
| 128 | .setDomainBytes(domainBytes) |
| 129 | .setVendorInfoBytes(vendorInfoBytes) |
| 130 | .build(); |
Lorenzo Colitti | c2abb2b | 2015-03-31 16:26:57 +0900 | [diff] [blame] | 131 | DhcpPacket offerPacket = DhcpPacket.decodeFullPacket(packet, ENCAP_BOOTP); |
| 132 | assertEquals(expectedDomain, offerPacket.mDomainName); |
Lorenzo Colitti | b0b3d0b | 2015-07-06 12:29:43 +0900 | [diff] [blame] | 133 | assertEquals(expectedVendorInfo, offerPacket.mVendorInfo); |
Lorenzo Colitti | c2abb2b | 2015-03-31 16:26:57 +0900 | [diff] [blame] | 134 | } |
| 135 | |
| 136 | @SmallTest |
| 137 | public void testDomainName() throws Exception { |
| 138 | byte[] nullByte = new byte[] { 0x00 }; |
| 139 | byte[] twoNullBytes = new byte[] { 0x00, 0x00 }; |
| 140 | byte[] nonNullDomain = new byte[] { |
| 141 | (byte) 'g', (byte) 'o', (byte) 'o', (byte) '.', (byte) 'g', (byte) 'l' |
| 142 | }; |
| 143 | byte[] trailingNullDomain = new byte[] { |
| 144 | (byte) 'g', (byte) 'o', (byte) 'o', (byte) '.', (byte) 'g', (byte) 'l', 0x00 |
| 145 | }; |
| 146 | byte[] embeddedNullsDomain = new byte[] { |
| 147 | (byte) 'g', (byte) 'o', (byte) 'o', 0x00, 0x00, (byte) 'g', (byte) 'l' |
| 148 | }; |
| 149 | byte[] metered = "ANDROID_METERED".getBytes("US-ASCII"); |
| 150 | |
| 151 | byte[] meteredEmbeddedNull = metered.clone(); |
| 152 | meteredEmbeddedNull[7] = (char) 0; |
| 153 | |
| 154 | byte[] meteredTrailingNull = metered.clone(); |
| 155 | meteredTrailingNull[meteredTrailingNull.length - 1] = (char) 0; |
| 156 | |
| 157 | assertDomainAndVendorInfoParses("", nullByte, "\u0000", nullByte); |
| 158 | assertDomainAndVendorInfoParses("", twoNullBytes, "\u0000\u0000", twoNullBytes); |
| 159 | assertDomainAndVendorInfoParses("goo.gl", nonNullDomain, "ANDROID_METERED", metered); |
| 160 | assertDomainAndVendorInfoParses("goo", embeddedNullsDomain, |
| 161 | "ANDROID\u0000METERED", meteredEmbeddedNull); |
| 162 | assertDomainAndVendorInfoParses("goo.gl", trailingNullDomain, |
| 163 | "ANDROID_METERE\u0000", meteredTrailingNull); |
| 164 | } |
Lorenzo Colitti | d973537 | 2015-06-02 13:15:50 +0900 | [diff] [blame] | 165 | |
| 166 | private void assertLeaseTimeParses(boolean expectValid, Integer rawLeaseTime, |
Erik Kline | 496906e | 2015-09-16 15:44:54 +0900 | [diff] [blame] | 167 | long leaseTimeMillis, byte[] leaseTimeBytes) throws Exception { |
Lorenzo Colitti | d973537 | 2015-06-02 13:15:50 +0900 | [diff] [blame] | 168 | TestDhcpPacket testPacket = new TestDhcpPacket(DHCP_MESSAGE_TYPE_OFFER); |
| 169 | if (leaseTimeBytes != null) { |
| 170 | testPacket.setLeaseTimeBytes(leaseTimeBytes); |
| 171 | } |
| 172 | ByteBuffer packet = testPacket.build(); |
Erik Kline | 496906e | 2015-09-16 15:44:54 +0900 | [diff] [blame] | 173 | DhcpPacket offerPacket = null; |
| 174 | |
Lorenzo Colitti | d973537 | 2015-06-02 13:15:50 +0900 | [diff] [blame] | 175 | if (!expectValid) { |
Erik Kline | 496906e | 2015-09-16 15:44:54 +0900 | [diff] [blame] | 176 | try { |
| 177 | offerPacket = DhcpPacket.decodeFullPacket(packet, ENCAP_BOOTP); |
| 178 | fail("Invalid packet parsed successfully: " + offerPacket); |
| 179 | } catch (ParseException expected) { |
| 180 | } |
Lorenzo Colitti | d973537 | 2015-06-02 13:15:50 +0900 | [diff] [blame] | 181 | return; |
| 182 | } |
Erik Kline | 496906e | 2015-09-16 15:44:54 +0900 | [diff] [blame] | 183 | |
| 184 | offerPacket = DhcpPacket.decodeFullPacket(packet, ENCAP_BOOTP); |
| 185 | assertNotNull(offerPacket); |
Lorenzo Colitti | d973537 | 2015-06-02 13:15:50 +0900 | [diff] [blame] | 186 | assertEquals(rawLeaseTime, offerPacket.mLeaseTime); |
| 187 | DhcpResults dhcpResults = offerPacket.toDhcpResults(); // Just check this doesn't crash. |
| 188 | assertEquals(leaseTimeMillis, offerPacket.getLeaseTimeMillis()); |
| 189 | } |
| 190 | |
| 191 | @SmallTest |
| 192 | public void testLeaseTime() throws Exception { |
| 193 | byte[] noLease = null; |
| 194 | byte[] tooShortLease = new byte[] { 0x00, 0x00 }; |
| 195 | byte[] tooLongLease = new byte[] { 0x00, 0x00, 0x00, 60, 0x01 }; |
| 196 | byte[] zeroLease = new byte[] { 0x00, 0x00, 0x00, 0x00 }; |
| 197 | byte[] tenSecondLease = new byte[] { 0x00, 0x00, 0x00, 10 }; |
| 198 | byte[] oneMinuteLease = new byte[] { 0x00, 0x00, 0x00, 60 }; |
| 199 | byte[] fiveMinuteLease = new byte[] { 0x00, 0x00, 0x01, 0x2c }; |
| 200 | byte[] oneDayLease = new byte[] { 0x00, 0x01, 0x51, (byte) 0x80 }; |
| 201 | byte[] maxIntPlusOneLease = new byte[] { (byte) 0x80, 0x00, 0x00, 0x01 }; |
| 202 | byte[] infiniteLease = new byte[] { (byte) 0xff, (byte) 0xff, (byte) 0xff, (byte) 0xff }; |
| 203 | |
| 204 | assertLeaseTimeParses(true, null, 0, noLease); |
| 205 | assertLeaseTimeParses(false, null, 0, tooShortLease); |
| 206 | assertLeaseTimeParses(false, null, 0, tooLongLease); |
| 207 | assertLeaseTimeParses(true, 0, 60 * 1000, zeroLease); |
| 208 | assertLeaseTimeParses(true, 10, 60 * 1000, tenSecondLease); |
| 209 | assertLeaseTimeParses(true, 60, 60 * 1000, oneMinuteLease); |
| 210 | assertLeaseTimeParses(true, 300, 300 * 1000, fiveMinuteLease); |
| 211 | assertLeaseTimeParses(true, 86400, 86400 * 1000, oneDayLease); |
| 212 | assertLeaseTimeParses(true, -2147483647, 2147483649L * 1000, maxIntPlusOneLease); |
| 213 | assertLeaseTimeParses(true, DhcpPacket.INFINITE_LEASE, 0, infiniteLease); |
| 214 | } |
Lorenzo Colitti | f68edb1 | 2015-06-02 17:46:24 +0900 | [diff] [blame] | 215 | |
| 216 | private void checkIpAddress(String expected, Inet4Address clientIp, Inet4Address yourIp, |
Erik Kline | 496906e | 2015-09-16 15:44:54 +0900 | [diff] [blame] | 217 | byte[] netmaskBytes) throws Exception { |
Lorenzo Colitti | f68edb1 | 2015-06-02 17:46:24 +0900 | [diff] [blame] | 218 | checkIpAddress(expected, DHCP_MESSAGE_TYPE_OFFER, clientIp, yourIp, netmaskBytes); |
| 219 | checkIpAddress(expected, DHCP_MESSAGE_TYPE_ACK, clientIp, yourIp, netmaskBytes); |
| 220 | } |
| 221 | |
| 222 | private void checkIpAddress(String expected, byte type, |
| 223 | Inet4Address clientIp, Inet4Address yourIp, |
Erik Kline | 496906e | 2015-09-16 15:44:54 +0900 | [diff] [blame] | 224 | byte[] netmaskBytes) throws Exception { |
Lorenzo Colitti | f68edb1 | 2015-06-02 17:46:24 +0900 | [diff] [blame] | 225 | ByteBuffer packet = new TestDhcpPacket(type, clientIp, yourIp) |
| 226 | .setNetmaskBytes(netmaskBytes) |
| 227 | .build(); |
| 228 | DhcpPacket offerPacket = DhcpPacket.decodeFullPacket(packet, ENCAP_BOOTP); |
| 229 | DhcpResults results = offerPacket.toDhcpResults(); |
| 230 | |
| 231 | if (expected != null) { |
| 232 | LinkAddress expectedAddress = new LinkAddress(expected); |
| 233 | assertEquals(expectedAddress, results.ipAddress); |
| 234 | } else { |
| 235 | assertNull(results); |
| 236 | } |
| 237 | } |
| 238 | |
| 239 | @SmallTest |
| 240 | public void testIpAddress() throws Exception { |
| 241 | byte[] slash11Netmask = new byte[] { (byte) 0xff, (byte) 0xe0, 0x00, 0x00 }; |
| 242 | byte[] slash24Netmask = new byte[] { (byte) 0xff, (byte) 0xff, (byte) 0xff, 0x00 }; |
| 243 | byte[] invalidNetmask = new byte[] { (byte) 0xff, (byte) 0xfb, (byte) 0xff, 0x00 }; |
Lorenzo Colitti | b0b3d0b | 2015-07-06 12:29:43 +0900 | [diff] [blame] | 244 | Inet4Address example1 = v4Address("192.0.2.1"); |
| 245 | Inet4Address example2 = v4Address("192.0.2.43"); |
Lorenzo Colitti | f68edb1 | 2015-06-02 17:46:24 +0900 | [diff] [blame] | 246 | |
| 247 | // A packet without any addresses is not valid. |
| 248 | checkIpAddress(null, ANY, ANY, slash24Netmask); |
| 249 | |
| 250 | // ClientIP is used iff YourIP is not present. |
| 251 | checkIpAddress("192.0.2.1/24", example2, example1, slash24Netmask); |
| 252 | checkIpAddress("192.0.2.43/11", example2, ANY, slash11Netmask); |
| 253 | checkIpAddress("192.0.2.43/11", ANY, example2, slash11Netmask); |
| 254 | |
| 255 | // Invalid netmasks are ignored. |
| 256 | checkIpAddress(null, example2, ANY, invalidNetmask); |
| 257 | |
| 258 | // If there is no netmask, implicit netmasks are used. |
| 259 | checkIpAddress("192.0.2.43/24", ANY, example2, null); |
| 260 | } |
Lorenzo Colitti | b0b3d0b | 2015-07-06 12:29:43 +0900 | [diff] [blame] | 261 | |
| 262 | private void assertDhcpResults(String ipAddress, String gateway, String dnsServersString, |
| 263 | String domains, String serverAddress, String vendorInfo, int leaseDuration, |
Lorenzo Colitti | 77fdf23 | 2016-03-31 16:20:22 +0900 | [diff] [blame] | 264 | boolean hasMeteredHint, int mtu, DhcpResults dhcpResults) throws Exception { |
Lorenzo Colitti | b0b3d0b | 2015-07-06 12:29:43 +0900 | [diff] [blame] | 265 | assertEquals(new LinkAddress(ipAddress), dhcpResults.ipAddress); |
| 266 | assertEquals(v4Address(gateway), dhcpResults.gateway); |
| 267 | |
| 268 | String[] dnsServerStrings = dnsServersString.split(","); |
| 269 | ArrayList dnsServers = new ArrayList(); |
| 270 | for (String dnsServerString : dnsServerStrings) { |
| 271 | dnsServers.add(v4Address(dnsServerString)); |
| 272 | } |
| 273 | assertEquals(dnsServers, dhcpResults.dnsServers); |
| 274 | |
| 275 | assertEquals(domains, dhcpResults.domains); |
| 276 | assertEquals(v4Address(serverAddress), dhcpResults.serverAddress); |
| 277 | assertEquals(vendorInfo, dhcpResults.vendorInfo); |
| 278 | assertEquals(leaseDuration, dhcpResults.leaseDuration); |
| 279 | assertEquals(hasMeteredHint, dhcpResults.hasMeteredHint()); |
Lorenzo Colitti | 77fdf23 | 2016-03-31 16:20:22 +0900 | [diff] [blame] | 280 | assertEquals(mtu, dhcpResults.mtu); |
Lorenzo Colitti | b0b3d0b | 2015-07-06 12:29:43 +0900 | [diff] [blame] | 281 | } |
| 282 | |
| 283 | @SmallTest |
| 284 | public void testOffer1() throws Exception { |
| 285 | // TODO: Turn all of these into golden files. This will probably require modifying |
| 286 | // Android.mk appropriately, making this into an AndroidTestCase, and adding code to read |
| 287 | // the golden files from the test APK's assets via mContext.getAssets(). |
| 288 | final ByteBuffer packet = ByteBuffer.wrap(HexEncoding.decode(( |
| 289 | // IP header. |
| 290 | "451001480000000080118849c0a89003c0a89ff7" + |
| 291 | // UDP header. |
| 292 | "004300440134dcfa" + |
| 293 | // BOOTP header. |
| 294 | "02010600c997a63b0000000000000000c0a89ff70000000000000000" + |
| 295 | // MAC address. |
| 296 | "30766ff2a90c00000000000000000000" + |
| 297 | // Server name. |
| 298 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 299 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 300 | // File. |
| 301 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 302 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 303 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 304 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 305 | // Options |
| 306 | "638253633501023604c0a89003330400001c200104fffff0000304c0a89ffe06080808080808080404" + |
| 307 | "3a0400000e103b040000189cff00000000000000000000" |
| 308 | ).toCharArray(), false)); |
| 309 | |
| 310 | DhcpPacket offerPacket = DhcpPacket.decodeFullPacket(packet, ENCAP_L3); |
| 311 | assertTrue(offerPacket instanceof DhcpOfferPacket); // Implicitly checks it's non-null. |
| 312 | DhcpResults dhcpResults = offerPacket.toDhcpResults(); |
| 313 | assertDhcpResults("192.168.159.247/20", "192.168.159.254", "8.8.8.8,8.8.4.4", |
Lorenzo Colitti | 77fdf23 | 2016-03-31 16:20:22 +0900 | [diff] [blame] | 314 | null, "192.168.144.3", null, 7200, false, 0, dhcpResults); |
Lorenzo Colitti | b0b3d0b | 2015-07-06 12:29:43 +0900 | [diff] [blame] | 315 | } |
| 316 | |
| 317 | @SmallTest |
| 318 | public void testOffer2() throws Exception { |
| 319 | final ByteBuffer packet = ByteBuffer.wrap(HexEncoding.decode(( |
| 320 | // IP header. |
| 321 | "450001518d0600004011144dc0a82b01c0a82bf7" + |
| 322 | // UDP header. |
| 323 | "00430044013d9ac7" + |
| 324 | // BOOTP header. |
| 325 | "02010600dfc23d1f0002000000000000c0a82bf7c0a82b0100000000" + |
| 326 | // MAC address. |
| 327 | "30766ff2a90c00000000000000000000" + |
| 328 | // Server name. |
| 329 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 330 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 331 | // File. |
| 332 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 333 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 334 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 335 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 336 | // Options |
| 337 | "638253633501023604c0a82b01330400000e103a04000007083b0400000c4e0104ffffff00" + |
| 338 | "1c04c0a82bff0304c0a82b010604c0a82b012b0f414e44524f49445f4d455445524544ff" |
| 339 | ).toCharArray(), false)); |
| 340 | |
| 341 | assertEquals(337, packet.limit()); |
| 342 | DhcpPacket offerPacket = DhcpPacket.decodeFullPacket(packet, ENCAP_L3); |
| 343 | assertTrue(offerPacket instanceof DhcpOfferPacket); // Implicitly checks it's non-null. |
| 344 | DhcpResults dhcpResults = offerPacket.toDhcpResults(); |
| 345 | assertDhcpResults("192.168.43.247/24", "192.168.43.1", "192.168.43.1", |
Lorenzo Colitti | 77fdf23 | 2016-03-31 16:20:22 +0900 | [diff] [blame] | 346 | null, "192.168.43.1", "ANDROID_METERED", 3600, true, 0, dhcpResults); |
Lorenzo Colitti | b0b3d0b | 2015-07-06 12:29:43 +0900 | [diff] [blame] | 347 | assertTrue(dhcpResults.hasMeteredHint()); |
| 348 | } |
| 349 | |
Lorenzo Colitti | 77fdf23 | 2016-03-31 16:20:22 +0900 | [diff] [blame] | 350 | private byte[] mtuBytes(int mtu) { |
| 351 | // 0x1a02: option 26, length 2. 0xff: no more options. |
| 352 | if (mtu > Short.MAX_VALUE - Short.MIN_VALUE) { |
| 353 | throw new IllegalArgumentException( |
| 354 | String.format("Invalid MTU %d, must be 16-bit unsigned", mtu)); |
| 355 | } |
| 356 | String hexString = String.format("1a02%04xff", mtu); |
| 357 | return HexEncoding.decode(hexString.toCharArray(), false); |
| 358 | } |
| 359 | |
| 360 | private void checkMtu(ByteBuffer packet, int expectedMtu, byte[] mtuBytes) throws Exception { |
| 361 | if (mtuBytes != null) { |
| 362 | packet.position(packet.capacity() - mtuBytes.length); |
| 363 | packet.put(mtuBytes); |
| 364 | packet.clear(); |
| 365 | } |
| 366 | DhcpPacket offerPacket = DhcpPacket.decodeFullPacket(packet, ENCAP_L3); |
| 367 | assertTrue(offerPacket instanceof DhcpOfferPacket); // Implicitly checks it's non-null. |
| 368 | DhcpResults dhcpResults = offerPacket.toDhcpResults(); |
| 369 | assertDhcpResults("192.168.159.247/20", "192.168.159.254", "8.8.8.8,8.8.4.4", |
| 370 | null, "192.168.144.3", null, 7200, false, expectedMtu, dhcpResults); |
| 371 | } |
| 372 | |
| 373 | @SmallTest |
| 374 | public void testMtu() throws Exception { |
| 375 | final ByteBuffer packet = ByteBuffer.wrap(HexEncoding.decode(( |
| 376 | // IP header. |
| 377 | "451001480000000080118849c0a89003c0a89ff7" + |
| 378 | // UDP header. |
| 379 | "004300440134dcfa" + |
| 380 | // BOOTP header. |
| 381 | "02010600c997a63b0000000000000000c0a89ff70000000000000000" + |
| 382 | // MAC address. |
| 383 | "30766ff2a90c00000000000000000000" + |
| 384 | // Server name. |
| 385 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 386 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 387 | // File. |
| 388 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 389 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 390 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 391 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 392 | // Options |
| 393 | "638253633501023604c0a89003330400001c200104fffff0000304c0a89ffe06080808080808080404" + |
| 394 | "3a0400000e103b040000189cff00000000" |
| 395 | ).toCharArray(), false)); |
| 396 | |
| 397 | checkMtu(packet, 0, null); |
| 398 | checkMtu(packet, 0, mtuBytes(1501)); |
| 399 | checkMtu(packet, 1500, mtuBytes(1500)); |
| 400 | checkMtu(packet, 1499, mtuBytes(1499)); |
| 401 | checkMtu(packet, 1280, mtuBytes(1280)); |
| 402 | checkMtu(packet, 0, mtuBytes(1279)); |
| 403 | checkMtu(packet, 0, mtuBytes(576)); |
| 404 | checkMtu(packet, 0, mtuBytes(68)); |
| 405 | checkMtu(packet, 0, mtuBytes(Short.MIN_VALUE)); |
| 406 | checkMtu(packet, 0, mtuBytes(Short.MAX_VALUE + 3)); |
| 407 | checkMtu(packet, 0, mtuBytes(-1)); |
| 408 | } |
| 409 | |
Lorenzo Colitti | b0b3d0b | 2015-07-06 12:29:43 +0900 | [diff] [blame] | 410 | @SmallTest |
Lorenzo Colitti | d64144a | 2015-09-03 17:36:20 +0900 | [diff] [blame] | 411 | public void testBadHwaddrLength() throws Exception { |
| 412 | final ByteBuffer packet = ByteBuffer.wrap(HexEncoding.decode(( |
| 413 | // IP header. |
| 414 | "450001518d0600004011144dc0a82b01c0a82bf7" + |
| 415 | // UDP header. |
| 416 | "00430044013d9ac7" + |
| 417 | // BOOTP header. |
| 418 | "02010600dfc23d1f0002000000000000c0a82bf7c0a82b0100000000" + |
| 419 | // MAC address. |
| 420 | "30766ff2a90c00000000000000000000" + |
| 421 | // Server name. |
| 422 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 423 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 424 | // File. |
| 425 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 426 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 427 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 428 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 429 | // Options |
| 430 | "638253633501023604c0a82b01330400000e103a04000007083b0400000c4e0104ffffff00" + |
| 431 | "1c04c0a82bff0304c0a82b010604c0a82b012b0f414e44524f49445f4d455445524544ff" |
| 432 | ).toCharArray(), false)); |
| 433 | String expectedClientMac = "30766FF2A90C"; |
| 434 | |
| 435 | final int hwAddrLenOffset = 20 + 8 + 2; |
| 436 | assertEquals(6, packet.get(hwAddrLenOffset)); |
| 437 | |
| 438 | // Expect the expected. |
| 439 | DhcpPacket offerPacket = DhcpPacket.decodeFullPacket(packet, ENCAP_L3); |
| 440 | assertNotNull(offerPacket); |
| 441 | assertEquals(6, offerPacket.getClientMac().length); |
| 442 | assertEquals(expectedClientMac, HexDump.toHexString(offerPacket.getClientMac())); |
| 443 | |
| 444 | // Reduce the hardware address length and verify that it shortens the client MAC. |
| 445 | packet.flip(); |
| 446 | packet.put(hwAddrLenOffset, (byte) 5); |
| 447 | offerPacket = DhcpPacket.decodeFullPacket(packet, ENCAP_L3); |
| 448 | assertNotNull(offerPacket); |
| 449 | assertEquals(5, offerPacket.getClientMac().length); |
| 450 | assertEquals(expectedClientMac.substring(0, 10), |
| 451 | HexDump.toHexString(offerPacket.getClientMac())); |
| 452 | |
| 453 | packet.flip(); |
| 454 | packet.put(hwAddrLenOffset, (byte) 3); |
| 455 | offerPacket = DhcpPacket.decodeFullPacket(packet, ENCAP_L3); |
| 456 | assertNotNull(offerPacket); |
| 457 | assertEquals(3, offerPacket.getClientMac().length); |
| 458 | assertEquals(expectedClientMac.substring(0, 6), |
| 459 | HexDump.toHexString(offerPacket.getClientMac())); |
| 460 | |
| 461 | // Set the the hardware address length to 0xff and verify that we a) don't treat it as -1 |
| 462 | // and crash, and b) hardcode it to 6. |
| 463 | packet.flip(); |
| 464 | packet.put(hwAddrLenOffset, (byte) -1); |
| 465 | offerPacket = DhcpPacket.decodeFullPacket(packet, ENCAP_L3); |
| 466 | assertNotNull(offerPacket); |
| 467 | assertEquals(6, offerPacket.getClientMac().length); |
| 468 | assertEquals(expectedClientMac, HexDump.toHexString(offerPacket.getClientMac())); |
| 469 | |
| 470 | // Set the the hardware address length to a positive invalid value (> 16) and verify that we |
| 471 | // hardcode it to 6. |
| 472 | packet.flip(); |
| 473 | packet.put(hwAddrLenOffset, (byte) 17); |
| 474 | offerPacket = DhcpPacket.decodeFullPacket(packet, ENCAP_L3); |
| 475 | assertNotNull(offerPacket); |
| 476 | assertEquals(6, offerPacket.getClientMac().length); |
| 477 | assertEquals(expectedClientMac, HexDump.toHexString(offerPacket.getClientMac())); |
| 478 | } |
| 479 | |
| 480 | @SmallTest |
Lorenzo Colitti | b0b3d0b | 2015-07-06 12:29:43 +0900 | [diff] [blame] | 481 | public void testPadAndOverloadedOptionsOffer() throws Exception { |
| 482 | // A packet observed in the real world that is interesting for two reasons: |
| 483 | // |
| 484 | // 1. It uses pad bytes, which we previously didn't support correctly. |
| 485 | // 2. It uses DHCP option overloading, which we don't currently support (but it doesn't |
| 486 | // store any information in the overloaded fields). |
| 487 | // |
| 488 | // For now, we just check that it parses correctly. |
| 489 | final ByteBuffer packet = ByteBuffer.wrap(HexEncoding.decode(( |
| 490 | // Ethernet header. |
| 491 | "b4cef6000000e80462236e300800" + |
| 492 | // IP header. |
| 493 | "4500014c00000000ff11741701010101ac119876" + |
| 494 | // UDP header. TODO: fix invalid checksum (due to MAC address obfuscation). |
| 495 | "004300440138ae5a" + |
| 496 | // BOOTP header. |
| 497 | "020106000fa0059f0000000000000000ac1198760000000000000000" + |
| 498 | // MAC address. |
| 499 | "b4cef600000000000000000000000000" + |
| 500 | // Server name. |
| 501 | "ff00000000000000000000000000000000000000000000000000000000000000" + |
| 502 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 503 | // File. |
| 504 | "ff00000000000000000000000000000000000000000000000000000000000000" + |
| 505 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 506 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 507 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 508 | // Options |
| 509 | "638253633501023604010101010104ffff000033040000a8c03401030304ac1101010604ac110101" + |
| 510 | "0000000000000000000000000000000000000000000000ff000000" |
| 511 | ).toCharArray(), false)); |
| 512 | |
| 513 | DhcpPacket offerPacket = DhcpPacket.decodeFullPacket(packet, ENCAP_L2); |
| 514 | assertTrue(offerPacket instanceof DhcpOfferPacket); |
| 515 | DhcpResults dhcpResults = offerPacket.toDhcpResults(); |
| 516 | assertDhcpResults("172.17.152.118/16", "172.17.1.1", "172.17.1.1", |
Lorenzo Colitti | 77fdf23 | 2016-03-31 16:20:22 +0900 | [diff] [blame] | 517 | null, "1.1.1.1", null, 43200, false, 0, dhcpResults); |
Lorenzo Colitti | b0b3d0b | 2015-07-06 12:29:43 +0900 | [diff] [blame] | 518 | } |
Lorenzo Colitti | f28e62b | 2015-07-27 16:35:22 +0900 | [diff] [blame] | 519 | |
| 520 | @SmallTest |
| 521 | public void testBug2111() throws Exception { |
| 522 | final ByteBuffer packet = ByteBuffer.wrap(HexEncoding.decode(( |
| 523 | // IP header. |
| 524 | "4500014c00000000ff119beac3eaf3880a3f5d04" + |
| 525 | // UDP header. TODO: fix invalid checksum (due to MAC address obfuscation). |
| 526 | "0043004401387464" + |
| 527 | // BOOTP header. |
| 528 | "0201060002554812000a0000000000000a3f5d040000000000000000" + |
| 529 | // MAC address. |
| 530 | "00904c00000000000000000000000000" + |
| 531 | // Server name. |
| 532 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 533 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 534 | // File. |
| 535 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 536 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 537 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 538 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 539 | // Options. |
| 540 | "638253633501023604c00002fe33040000bfc60104fffff00003040a3f50010608c0000201c0000202" + |
| 541 | "0f0f646f6d61696e3132332e636f2e756b0000000000ff00000000" |
| 542 | ).toCharArray(), false)); |
| 543 | |
| 544 | DhcpPacket offerPacket = DhcpPacket.decodeFullPacket(packet, ENCAP_L3); |
| 545 | assertTrue(offerPacket instanceof DhcpOfferPacket); |
| 546 | DhcpResults dhcpResults = offerPacket.toDhcpResults(); |
| 547 | assertDhcpResults("10.63.93.4/20", "10.63.80.1", "192.0.2.1,192.0.2.2", |
Lorenzo Colitti | 77fdf23 | 2016-03-31 16:20:22 +0900 | [diff] [blame] | 548 | "domain123.co.uk", "192.0.2.254", null, 49094, false, 0, dhcpResults); |
Lorenzo Colitti | f28e62b | 2015-07-27 16:35:22 +0900 | [diff] [blame] | 549 | } |
| 550 | |
| 551 | @SmallTest |
| 552 | public void testBug2136() throws Exception { |
| 553 | final ByteBuffer packet = ByteBuffer.wrap(HexEncoding.decode(( |
| 554 | // Ethernet header. |
| 555 | "bcf5ac000000d0c7890000000800" + |
| 556 | // IP header. |
| 557 | "4500014c00000000ff119beac3eaf3880a3f5d04" + |
| 558 | // UDP header. TODO: fix invalid checksum (due to MAC address obfuscation). |
| 559 | "0043004401387574" + |
| 560 | // BOOTP header. |
| 561 | "0201060163339a3000050000000000000a209ecd0000000000000000" + |
| 562 | // MAC address. |
| 563 | "bcf5ac00000000000000000000000000" + |
| 564 | // Server name. |
| 565 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 566 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 567 | // File. |
| 568 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 569 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 570 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 571 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 572 | // Options. |
| 573 | "6382536335010236040a20ff80330400001c200104fffff00003040a20900106089458413494584135" + |
| 574 | "0f0b6c616e63732e61632e756b000000000000000000ff00000000" |
| 575 | ).toCharArray(), false)); |
| 576 | |
| 577 | DhcpPacket offerPacket = DhcpPacket.decodeFullPacket(packet, ENCAP_L2); |
| 578 | assertTrue(offerPacket instanceof DhcpOfferPacket); |
| 579 | assertEquals("BCF5AC000000", HexDump.toHexString(offerPacket.getClientMac())); |
| 580 | DhcpResults dhcpResults = offerPacket.toDhcpResults(); |
| 581 | assertDhcpResults("10.32.158.205/20", "10.32.144.1", "148.88.65.52,148.88.65.53", |
Lorenzo Colitti | 77fdf23 | 2016-03-31 16:20:22 +0900 | [diff] [blame] | 582 | "lancs.ac.uk", "10.32.255.128", null, 7200, false, 0, dhcpResults); |
Lorenzo Colitti | f28e62b | 2015-07-27 16:35:22 +0900 | [diff] [blame] | 583 | } |
Erik Kline | b19238c | 2015-10-06 18:43:17 +0900 | [diff] [blame] | 584 | |
| 585 | @SmallTest |
| 586 | public void testUdpServerAnySourcePort() throws Exception { |
| 587 | final ByteBuffer packet = ByteBuffer.wrap(HexEncoding.decode(( |
| 588 | // Ethernet header. |
| 589 | "9cd917000000001c2e0000000800" + |
| 590 | // IP header. |
| 591 | "45a00148000040003d115087d18194fb0a0f7af2" + |
| 592 | // UDP header. TODO: fix invalid checksum (due to MAC address obfuscation). |
| 593 | // NOTE: The server source port is not the canonical port 67. |
| 594 | "C29F004401341268" + |
| 595 | // BOOTP header. |
| 596 | "02010600d628ba8200000000000000000a0f7af2000000000a0fc818" + |
| 597 | // MAC address. |
| 598 | "9cd91700000000000000000000000000" + |
| 599 | // Server name. |
| 600 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 601 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 602 | // File. |
| 603 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 604 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 605 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 606 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 607 | // Options. |
| 608 | "6382536335010236040a0169fc3304000151800104ffff000003040a0fc817060cd1818003d1819403" + |
| 609 | "d18180060f0777766d2e6564751c040a0fffffff000000" |
| 610 | ).toCharArray(), false)); |
| 611 | |
| 612 | DhcpPacket offerPacket = DhcpPacket.decodeFullPacket(packet, ENCAP_L2); |
| 613 | assertTrue(offerPacket instanceof DhcpOfferPacket); |
| 614 | assertEquals("9CD917000000", HexDump.toHexString(offerPacket.getClientMac())); |
| 615 | DhcpResults dhcpResults = offerPacket.toDhcpResults(); |
| 616 | assertDhcpResults("10.15.122.242/16", "10.15.200.23", |
| 617 | "209.129.128.3,209.129.148.3,209.129.128.6", |
Lorenzo Colitti | 77fdf23 | 2016-03-31 16:20:22 +0900 | [diff] [blame] | 618 | "wvm.edu", "10.1.105.252", null, 86400, false, 0, dhcpResults); |
Erik Kline | b19238c | 2015-10-06 18:43:17 +0900 | [diff] [blame] | 619 | } |
Lorenzo Colitti | 025f4a5 | 2015-09-17 07:55:29 +0900 | [diff] [blame] | 620 | |
| 621 | @SmallTest |
Lorenzo Colitti | f55c9c1 | 2016-03-02 13:31:52 +0900 | [diff] [blame] | 622 | public void testUdpInvalidDstPort() throws Exception { |
| 623 | final ByteBuffer packet = ByteBuffer.wrap(HexEncoding.decode(( |
| 624 | // Ethernet header. |
| 625 | "9cd917000000001c2e0000000800" + |
| 626 | // IP header. |
| 627 | "45a00148000040003d115087d18194fb0a0f7af2" + |
| 628 | // UDP header. TODO: fix invalid checksum (due to MAC address obfuscation). |
| 629 | // NOTE: The destination port is a non-DHCP port. |
| 630 | "0043aaaa01341268" + |
| 631 | // BOOTP header. |
| 632 | "02010600d628ba8200000000000000000a0f7af2000000000a0fc818" + |
| 633 | // MAC address. |
| 634 | "9cd91700000000000000000000000000" + |
| 635 | // Server name. |
| 636 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 637 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 638 | // File. |
| 639 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 640 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 641 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 642 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 643 | // Options. |
| 644 | "6382536335010236040a0169fc3304000151800104ffff000003040a0fc817060cd1818003d1819403" + |
| 645 | "d18180060f0777766d2e6564751c040a0fffffff000000" |
| 646 | ).toCharArray(), false)); |
| 647 | |
| 648 | try { |
| 649 | DhcpPacket.decodeFullPacket(packet, ENCAP_L2); |
| 650 | fail("Packet with invalid dst port did not throw ParseException"); |
| 651 | } catch (ParseException expected) {} |
| 652 | } |
| 653 | |
| 654 | @SmallTest |
Lorenzo Colitti | 025f4a5 | 2015-09-17 07:55:29 +0900 | [diff] [blame] | 655 | public void testMultipleRouters() throws Exception { |
| 656 | final ByteBuffer packet = ByteBuffer.wrap(HexEncoding.decode(( |
| 657 | // Ethernet header. |
| 658 | "fc3d93000000" + "081735000000" + "0800" + |
| 659 | // IP header. |
| 660 | "45000148c2370000ff117ac2c0a8bd02ffffffff" + |
| 661 | // UDP header. TODO: fix invalid checksum (due to MAC address obfuscation). |
| 662 | "0043004401343beb" + |
| 663 | // BOOTP header. |
| 664 | "0201060027f518e20000800000000000c0a8bd310000000000000000" + |
| 665 | // MAC address. |
| 666 | "fc3d9300000000000000000000000000" + |
| 667 | // Server name. |
| 668 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 669 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 670 | // File. |
| 671 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 672 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 673 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 674 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 675 | // Options. |
| 676 | "638253633501023604c0abbd023304000070803a04000038403b04000062700104ffffff00" + |
| 677 | "0308c0a8bd01ffffff0006080808080808080404ff000000000000" |
| 678 | ).toCharArray(), false)); |
| 679 | |
| 680 | DhcpPacket offerPacket = DhcpPacket.decodeFullPacket(packet, ENCAP_L2); |
| 681 | assertTrue(offerPacket instanceof DhcpOfferPacket); |
| 682 | assertEquals("FC3D93000000", HexDump.toHexString(offerPacket.getClientMac())); |
| 683 | DhcpResults dhcpResults = offerPacket.toDhcpResults(); |
| 684 | assertDhcpResults("192.168.189.49/24", "192.168.189.1", "8.8.8.8,8.8.4.4", |
Lorenzo Colitti | 77fdf23 | 2016-03-31 16:20:22 +0900 | [diff] [blame] | 685 | null, "192.171.189.2", null, 28800, false, 0, dhcpResults); |
Lorenzo Colitti | 025f4a5 | 2015-09-17 07:55:29 +0900 | [diff] [blame] | 686 | } |
Lorenzo Colitti | 6c7acb6 | 2015-06-29 17:10:45 +0900 | [diff] [blame] | 687 | |
| 688 | @SmallTest |
| 689 | public void testDiscoverPacket() throws Exception { |
| 690 | short secs = 7; |
| 691 | int transactionId = 0xdeadbeef; |
| 692 | byte[] hwaddr = { |
| 693 | (byte) 0xda, (byte) 0x01, (byte) 0x19, (byte) 0x5b, (byte) 0xb1, (byte) 0x7a |
| 694 | }; |
Lorenzo Colitti | 6c7acb6 | 2015-06-29 17:10:45 +0900 | [diff] [blame] | 695 | |
| 696 | ByteBuffer packet = DhcpPacket.buildDiscoverPacket( |
| 697 | DhcpPacket.ENCAP_L2, transactionId, secs, hwaddr, |
Erik Kline | 1d511ab | 2016-03-24 17:30:13 +0900 | [diff] [blame] | 698 | false /* do unicast */, DhcpClient.REQUESTED_PARAMS); |
Lorenzo Colitti | 6c7acb6 | 2015-06-29 17:10:45 +0900 | [diff] [blame] | 699 | |
| 700 | byte[] headers = new byte[] { |
| 701 | // Ethernet header. |
| 702 | (byte) 0xff, (byte) 0xff, (byte) 0xff, (byte) 0xff, (byte) 0xff, (byte) 0xff, |
| 703 | (byte) 0xda, (byte) 0x01, (byte) 0x19, (byte) 0x5b, (byte) 0xb1, (byte) 0x7a, |
| 704 | (byte) 0x08, (byte) 0x00, |
| 705 | // IP header. |
Erik Kline | 1d511ab | 2016-03-24 17:30:13 +0900 | [diff] [blame] | 706 | (byte) 0x45, (byte) 0x10, (byte) 0x01, (byte) 0x56, |
Lorenzo Colitti | 6c7acb6 | 2015-06-29 17:10:45 +0900 | [diff] [blame] | 707 | (byte) 0x00, (byte) 0x00, (byte) 0x40, (byte) 0x00, |
Erik Kline | 1d511ab | 2016-03-24 17:30:13 +0900 | [diff] [blame] | 708 | (byte) 0x40, (byte) 0x11, (byte) 0x39, (byte) 0x88, |
Lorenzo Colitti | 6c7acb6 | 2015-06-29 17:10:45 +0900 | [diff] [blame] | 709 | (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, |
| 710 | (byte) 0xff, (byte) 0xff, (byte) 0xff, (byte) 0xff, |
| 711 | // UDP header. |
| 712 | (byte) 0x00, (byte) 0x44, (byte) 0x00, (byte) 0x43, |
Erik Kline | 1d511ab | 2016-03-24 17:30:13 +0900 | [diff] [blame] | 713 | (byte) 0x01, (byte) 0x42, (byte) 0x6a, (byte) 0x4a, |
Lorenzo Colitti | 6c7acb6 | 2015-06-29 17:10:45 +0900 | [diff] [blame] | 714 | // BOOTP. |
| 715 | (byte) 0x01, (byte) 0x01, (byte) 0x06, (byte) 0x00, |
| 716 | (byte) 0xde, (byte) 0xad, (byte) 0xbe, (byte) 0xef, |
| 717 | (byte) 0x00, (byte) 0x07, (byte) 0x00, (byte) 0x00, |
| 718 | (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, |
| 719 | (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, |
| 720 | (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, |
| 721 | (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, |
| 722 | (byte) 0xda, (byte) 0x01, (byte) 0x19, (byte) 0x5b, |
| 723 | (byte) 0xb1, (byte) 0x7a |
| 724 | }; |
| 725 | byte[] options = new byte[] { |
| 726 | // Magic cookie 0x63825363. |
| 727 | (byte) 0x63, (byte) 0x82, (byte) 0x53, (byte) 0x63, |
| 728 | // Message type DISCOVER. |
| 729 | (byte) 0x35, (byte) 0x01, (byte) 0x01, |
| 730 | // Client identifier Ethernet, da:01:19:5b:b1:7a. |
| 731 | (byte) 0x3d, (byte) 0x07, |
| 732 | (byte) 0x01, |
| 733 | (byte) 0xda, (byte) 0x01, (byte) 0x19, (byte) 0x5b, (byte) 0xb1, (byte) 0x7a, |
| 734 | // Max message size 1500. |
| 735 | (byte) 0x39, (byte) 0x02, (byte) 0x05, (byte) 0xdc, |
| 736 | // Version "android-dhcp-???". |
| 737 | (byte) 0x3c, (byte) 0x10, |
| 738 | 'a', 'n', 'd', 'r', 'o', 'i', 'd', '-', 'd', 'h', 'c', 'p', '-', '?', '?', '?', |
| 739 | // Hostname "android-01234567890abcde" |
| 740 | (byte) 0x0c, (byte) 0x18, |
| 741 | 'a', 'n', 'd', 'r', 'o', 'i', 'd', '-', |
| 742 | '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', 'a', 'b', 'c', 'd', 'e', |
| 743 | // Requested parameter list. |
Erik Kline | 1d511ab | 2016-03-24 17:30:13 +0900 | [diff] [blame] | 744 | (byte) 0x37, (byte) 0x0a, |
Lorenzo Colitti | 6c7acb6 | 2015-06-29 17:10:45 +0900 | [diff] [blame] | 745 | DHCP_SUBNET_MASK, |
| 746 | DHCP_ROUTER, |
| 747 | DHCP_DNS_SERVER, |
| 748 | DHCP_DOMAIN_NAME, |
| 749 | DHCP_MTU, |
Erik Kline | 1d511ab | 2016-03-24 17:30:13 +0900 | [diff] [blame] | 750 | DHCP_BROADCAST_ADDRESS, |
Lorenzo Colitti | 6c7acb6 | 2015-06-29 17:10:45 +0900 | [diff] [blame] | 751 | DHCP_LEASE_TIME, |
Erik Kline | 1d511ab | 2016-03-24 17:30:13 +0900 | [diff] [blame] | 752 | DHCP_RENEWAL_TIME, |
| 753 | DHCP_REBINDING_TIME, |
| 754 | DHCP_VENDOR_INFO, |
Lorenzo Colitti | 6c7acb6 | 2015-06-29 17:10:45 +0900 | [diff] [blame] | 755 | // End options. |
| 756 | (byte) 0xff, |
| 757 | // Our packets are always of even length. TODO: find out why and possibly fix it. |
| 758 | (byte) 0x00 |
| 759 | }; |
| 760 | byte[] expected = new byte[DhcpPacket.MIN_PACKET_LENGTH_L2 + options.length]; |
| 761 | assertTrue((expected.length & 1) == 0); |
| 762 | System.arraycopy(headers, 0, expected, 0, headers.length); |
| 763 | System.arraycopy(options, 0, expected, DhcpPacket.MIN_PACKET_LENGTH_L2, options.length); |
| 764 | |
| 765 | byte[] actual = new byte[packet.limit()]; |
| 766 | packet.get(actual); |
| 767 | String msg = |
| 768 | "Expected:\n " + Arrays.toString(expected) + |
| 769 | "\nActual:\n " + Arrays.toString(actual); |
| 770 | assertTrue(msg, Arrays.equals(expected, actual)); |
| 771 | } |
Lorenzo Colitti | c2abb2b | 2015-03-31 16:26:57 +0900 | [diff] [blame] | 772 | } |