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 | c2abb2b | 2015-03-31 16:26:57 +0900 | [diff] [blame] | 32 | |
| 33 | import static android.net.dhcp.DhcpPacket.*; |
| 34 | |
| 35 | |
| 36 | public class DhcpPacketTest extends TestCase { |
| 37 | |
Lorenzo Colitti | b0b3d0b | 2015-07-06 12:29:43 +0900 | [diff] [blame] | 38 | private static Inet4Address SERVER_ADDR = v4Address("192.0.2.1"); |
| 39 | private static Inet4Address CLIENT_ADDR = v4Address("192.0.2.234"); |
Lorenzo Colitti | f68edb1 | 2015-06-02 17:46:24 +0900 | [diff] [blame] | 40 | // Use our own empty address instead of Inet4Address.ANY or INADDR_ANY to ensure that the code |
| 41 | // doesn't use == instead of equals when comparing addresses. |
Lorenzo Colitti | b0b3d0b | 2015-07-06 12:29:43 +0900 | [diff] [blame] | 42 | private static Inet4Address ANY = (Inet4Address) v4Address("0.0.0.0"); |
Lorenzo Colitti | f68edb1 | 2015-06-02 17:46:24 +0900 | [diff] [blame] | 43 | |
Lorenzo Colitti | c2abb2b | 2015-03-31 16:26:57 +0900 | [diff] [blame] | 44 | private static byte[] CLIENT_MAC = new byte[] { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05 }; |
| 45 | |
Lorenzo Colitti | b0b3d0b | 2015-07-06 12:29:43 +0900 | [diff] [blame] | 46 | private static final Inet4Address v4Address(String addrString) throws IllegalArgumentException { |
| 47 | return (Inet4Address) NetworkUtils.numericToInetAddress(addrString); |
| 48 | } |
| 49 | |
Lorenzo Colitti | c2abb2b | 2015-03-31 16:26:57 +0900 | [diff] [blame] | 50 | class TestDhcpPacket extends DhcpPacket { |
| 51 | private byte mType; |
| 52 | // TODO: Make this a map of option numbers to bytes instead. |
Lorenzo Colitti | f68edb1 | 2015-06-02 17:46:24 +0900 | [diff] [blame] | 53 | private byte[] mDomainBytes, mVendorInfoBytes, mLeaseTimeBytes, mNetmaskBytes; |
Lorenzo Colitti | c2abb2b | 2015-03-31 16:26:57 +0900 | [diff] [blame] | 54 | |
Lorenzo Colitti | f68edb1 | 2015-06-02 17:46:24 +0900 | [diff] [blame] | 55 | public TestDhcpPacket(byte type, Inet4Address clientIp, Inet4Address yourIp) { |
| 56 | super(0xdeadbeef, (short) 0, clientIp, yourIp, INADDR_ANY, INADDR_ANY, |
Lorenzo Colitti | 3e97932 | 2015-04-21 15:22:17 +0900 | [diff] [blame] | 57 | CLIENT_MAC, true); |
Lorenzo Colitti | c2abb2b | 2015-03-31 16:26:57 +0900 | [diff] [blame] | 58 | mType = type; |
Lorenzo Colitti | d973537 | 2015-06-02 13:15:50 +0900 | [diff] [blame] | 59 | } |
| 60 | |
Lorenzo Colitti | f68edb1 | 2015-06-02 17:46:24 +0900 | [diff] [blame] | 61 | public TestDhcpPacket(byte type) { |
| 62 | this(type, INADDR_ANY, CLIENT_ADDR); |
| 63 | } |
| 64 | |
Lorenzo Colitti | d973537 | 2015-06-02 13:15:50 +0900 | [diff] [blame] | 65 | public TestDhcpPacket setDomainBytes(byte[] domainBytes) { |
Lorenzo Colitti | c2abb2b | 2015-03-31 16:26:57 +0900 | [diff] [blame] | 66 | mDomainBytes = domainBytes; |
Lorenzo Colitti | d973537 | 2015-06-02 13:15:50 +0900 | [diff] [blame] | 67 | return this; |
| 68 | } |
| 69 | |
| 70 | public TestDhcpPacket setVendorInfoBytes(byte[] vendorInfoBytes) { |
Lorenzo Colitti | c2abb2b | 2015-03-31 16:26:57 +0900 | [diff] [blame] | 71 | mVendorInfoBytes = vendorInfoBytes; |
Lorenzo Colitti | d973537 | 2015-06-02 13:15:50 +0900 | [diff] [blame] | 72 | return this; |
| 73 | } |
| 74 | |
| 75 | public TestDhcpPacket setLeaseTimeBytes(byte[] leaseTimeBytes) { |
| 76 | mLeaseTimeBytes = leaseTimeBytes; |
| 77 | return this; |
Lorenzo Colitti | c2abb2b | 2015-03-31 16:26:57 +0900 | [diff] [blame] | 78 | } |
| 79 | |
Lorenzo Colitti | f68edb1 | 2015-06-02 17:46:24 +0900 | [diff] [blame] | 80 | public TestDhcpPacket setNetmaskBytes(byte[] netmaskBytes) { |
| 81 | mNetmaskBytes = netmaskBytes; |
| 82 | return this; |
| 83 | } |
| 84 | |
Lorenzo Colitti | c2abb2b | 2015-03-31 16:26:57 +0900 | [diff] [blame] | 85 | public ByteBuffer buildPacket(int encap, short unusedDestUdp, short unusedSrcUdp) { |
| 86 | ByteBuffer result = ByteBuffer.allocate(MAX_LENGTH); |
| 87 | fillInPacket(encap, CLIENT_ADDR, SERVER_ADDR, |
| 88 | DHCP_CLIENT, DHCP_SERVER, result, DHCP_BOOTREPLY, false); |
| 89 | return result; |
| 90 | } |
| 91 | |
| 92 | public void finishPacket(ByteBuffer buffer) { |
| 93 | addTlv(buffer, DHCP_MESSAGE_TYPE, mType); |
| 94 | if (mDomainBytes != null) { |
| 95 | addTlv(buffer, DHCP_DOMAIN_NAME, mDomainBytes); |
| 96 | } |
| 97 | if (mVendorInfoBytes != null) { |
Lorenzo Colitti | b0b3d0b | 2015-07-06 12:29:43 +0900 | [diff] [blame] | 98 | addTlv(buffer, DHCP_VENDOR_INFO, mVendorInfoBytes); |
Lorenzo Colitti | c2abb2b | 2015-03-31 16:26:57 +0900 | [diff] [blame] | 99 | } |
Lorenzo Colitti | d973537 | 2015-06-02 13:15:50 +0900 | [diff] [blame] | 100 | if (mLeaseTimeBytes != null) { |
| 101 | addTlv(buffer, DHCP_LEASE_TIME, mLeaseTimeBytes); |
| 102 | } |
Lorenzo Colitti | f68edb1 | 2015-06-02 17:46:24 +0900 | [diff] [blame] | 103 | if (mNetmaskBytes != null) { |
| 104 | addTlv(buffer, DHCP_SUBNET_MASK, mNetmaskBytes); |
| 105 | } |
Lorenzo Colitti | c2abb2b | 2015-03-31 16:26:57 +0900 | [diff] [blame] | 106 | addTlvEnd(buffer); |
| 107 | } |
| 108 | |
| 109 | // Convenience method. |
| 110 | public ByteBuffer build() { |
| 111 | // ENCAP_BOOTP packets don't contain ports, so just pass in 0. |
| 112 | ByteBuffer pkt = buildPacket(ENCAP_BOOTP, (short) 0, (short) 0); |
| 113 | pkt.flip(); |
| 114 | return pkt; |
| 115 | } |
| 116 | } |
| 117 | |
| 118 | private void assertDomainAndVendorInfoParses( |
| 119 | String expectedDomain, byte[] domainBytes, |
Erik Kline | 496906e | 2015-09-16 15:44:54 +0900 | [diff] [blame^] | 120 | String expectedVendorInfo, byte[] vendorInfoBytes) throws Exception { |
Lorenzo Colitti | d973537 | 2015-06-02 13:15:50 +0900 | [diff] [blame] | 121 | ByteBuffer packet = new TestDhcpPacket(DHCP_MESSAGE_TYPE_OFFER) |
| 122 | .setDomainBytes(domainBytes) |
| 123 | .setVendorInfoBytes(vendorInfoBytes) |
| 124 | .build(); |
Lorenzo Colitti | c2abb2b | 2015-03-31 16:26:57 +0900 | [diff] [blame] | 125 | DhcpPacket offerPacket = DhcpPacket.decodeFullPacket(packet, ENCAP_BOOTP); |
| 126 | assertEquals(expectedDomain, offerPacket.mDomainName); |
Lorenzo Colitti | b0b3d0b | 2015-07-06 12:29:43 +0900 | [diff] [blame] | 127 | assertEquals(expectedVendorInfo, offerPacket.mVendorInfo); |
Lorenzo Colitti | c2abb2b | 2015-03-31 16:26:57 +0900 | [diff] [blame] | 128 | } |
| 129 | |
| 130 | @SmallTest |
| 131 | public void testDomainName() throws Exception { |
| 132 | byte[] nullByte = new byte[] { 0x00 }; |
| 133 | byte[] twoNullBytes = new byte[] { 0x00, 0x00 }; |
| 134 | byte[] nonNullDomain = new byte[] { |
| 135 | (byte) 'g', (byte) 'o', (byte) 'o', (byte) '.', (byte) 'g', (byte) 'l' |
| 136 | }; |
| 137 | byte[] trailingNullDomain = new byte[] { |
| 138 | (byte) 'g', (byte) 'o', (byte) 'o', (byte) '.', (byte) 'g', (byte) 'l', 0x00 |
| 139 | }; |
| 140 | byte[] embeddedNullsDomain = new byte[] { |
| 141 | (byte) 'g', (byte) 'o', (byte) 'o', 0x00, 0x00, (byte) 'g', (byte) 'l' |
| 142 | }; |
| 143 | byte[] metered = "ANDROID_METERED".getBytes("US-ASCII"); |
| 144 | |
| 145 | byte[] meteredEmbeddedNull = metered.clone(); |
| 146 | meteredEmbeddedNull[7] = (char) 0; |
| 147 | |
| 148 | byte[] meteredTrailingNull = metered.clone(); |
| 149 | meteredTrailingNull[meteredTrailingNull.length - 1] = (char) 0; |
| 150 | |
| 151 | assertDomainAndVendorInfoParses("", nullByte, "\u0000", nullByte); |
| 152 | assertDomainAndVendorInfoParses("", twoNullBytes, "\u0000\u0000", twoNullBytes); |
| 153 | assertDomainAndVendorInfoParses("goo.gl", nonNullDomain, "ANDROID_METERED", metered); |
| 154 | assertDomainAndVendorInfoParses("goo", embeddedNullsDomain, |
| 155 | "ANDROID\u0000METERED", meteredEmbeddedNull); |
| 156 | assertDomainAndVendorInfoParses("goo.gl", trailingNullDomain, |
| 157 | "ANDROID_METERE\u0000", meteredTrailingNull); |
| 158 | } |
Lorenzo Colitti | d973537 | 2015-06-02 13:15:50 +0900 | [diff] [blame] | 159 | |
| 160 | private void assertLeaseTimeParses(boolean expectValid, Integer rawLeaseTime, |
Erik Kline | 496906e | 2015-09-16 15:44:54 +0900 | [diff] [blame^] | 161 | long leaseTimeMillis, byte[] leaseTimeBytes) throws Exception { |
Lorenzo Colitti | d973537 | 2015-06-02 13:15:50 +0900 | [diff] [blame] | 162 | TestDhcpPacket testPacket = new TestDhcpPacket(DHCP_MESSAGE_TYPE_OFFER); |
| 163 | if (leaseTimeBytes != null) { |
| 164 | testPacket.setLeaseTimeBytes(leaseTimeBytes); |
| 165 | } |
| 166 | ByteBuffer packet = testPacket.build(); |
Erik Kline | 496906e | 2015-09-16 15:44:54 +0900 | [diff] [blame^] | 167 | DhcpPacket offerPacket = null; |
| 168 | |
Lorenzo Colitti | d973537 | 2015-06-02 13:15:50 +0900 | [diff] [blame] | 169 | if (!expectValid) { |
Erik Kline | 496906e | 2015-09-16 15:44:54 +0900 | [diff] [blame^] | 170 | try { |
| 171 | offerPacket = DhcpPacket.decodeFullPacket(packet, ENCAP_BOOTP); |
| 172 | fail("Invalid packet parsed successfully: " + offerPacket); |
| 173 | } catch (ParseException expected) { |
| 174 | } |
Lorenzo Colitti | d973537 | 2015-06-02 13:15:50 +0900 | [diff] [blame] | 175 | return; |
| 176 | } |
Erik Kline | 496906e | 2015-09-16 15:44:54 +0900 | [diff] [blame^] | 177 | |
| 178 | offerPacket = DhcpPacket.decodeFullPacket(packet, ENCAP_BOOTP); |
| 179 | assertNotNull(offerPacket); |
Lorenzo Colitti | d973537 | 2015-06-02 13:15:50 +0900 | [diff] [blame] | 180 | assertEquals(rawLeaseTime, offerPacket.mLeaseTime); |
| 181 | DhcpResults dhcpResults = offerPacket.toDhcpResults(); // Just check this doesn't crash. |
| 182 | assertEquals(leaseTimeMillis, offerPacket.getLeaseTimeMillis()); |
| 183 | } |
| 184 | |
| 185 | @SmallTest |
| 186 | public void testLeaseTime() throws Exception { |
| 187 | byte[] noLease = null; |
| 188 | byte[] tooShortLease = new byte[] { 0x00, 0x00 }; |
| 189 | byte[] tooLongLease = new byte[] { 0x00, 0x00, 0x00, 60, 0x01 }; |
| 190 | byte[] zeroLease = new byte[] { 0x00, 0x00, 0x00, 0x00 }; |
| 191 | byte[] tenSecondLease = new byte[] { 0x00, 0x00, 0x00, 10 }; |
| 192 | byte[] oneMinuteLease = new byte[] { 0x00, 0x00, 0x00, 60 }; |
| 193 | byte[] fiveMinuteLease = new byte[] { 0x00, 0x00, 0x01, 0x2c }; |
| 194 | byte[] oneDayLease = new byte[] { 0x00, 0x01, 0x51, (byte) 0x80 }; |
| 195 | byte[] maxIntPlusOneLease = new byte[] { (byte) 0x80, 0x00, 0x00, 0x01 }; |
| 196 | byte[] infiniteLease = new byte[] { (byte) 0xff, (byte) 0xff, (byte) 0xff, (byte) 0xff }; |
| 197 | |
| 198 | assertLeaseTimeParses(true, null, 0, noLease); |
| 199 | assertLeaseTimeParses(false, null, 0, tooShortLease); |
| 200 | assertLeaseTimeParses(false, null, 0, tooLongLease); |
| 201 | assertLeaseTimeParses(true, 0, 60 * 1000, zeroLease); |
| 202 | assertLeaseTimeParses(true, 10, 60 * 1000, tenSecondLease); |
| 203 | assertLeaseTimeParses(true, 60, 60 * 1000, oneMinuteLease); |
| 204 | assertLeaseTimeParses(true, 300, 300 * 1000, fiveMinuteLease); |
| 205 | assertLeaseTimeParses(true, 86400, 86400 * 1000, oneDayLease); |
| 206 | assertLeaseTimeParses(true, -2147483647, 2147483649L * 1000, maxIntPlusOneLease); |
| 207 | assertLeaseTimeParses(true, DhcpPacket.INFINITE_LEASE, 0, infiniteLease); |
| 208 | } |
Lorenzo Colitti | f68edb1 | 2015-06-02 17:46:24 +0900 | [diff] [blame] | 209 | |
| 210 | private void checkIpAddress(String expected, Inet4Address clientIp, Inet4Address yourIp, |
Erik Kline | 496906e | 2015-09-16 15:44:54 +0900 | [diff] [blame^] | 211 | byte[] netmaskBytes) throws Exception { |
Lorenzo Colitti | f68edb1 | 2015-06-02 17:46:24 +0900 | [diff] [blame] | 212 | checkIpAddress(expected, DHCP_MESSAGE_TYPE_OFFER, clientIp, yourIp, netmaskBytes); |
| 213 | checkIpAddress(expected, DHCP_MESSAGE_TYPE_ACK, clientIp, yourIp, netmaskBytes); |
| 214 | } |
| 215 | |
| 216 | private void checkIpAddress(String expected, byte type, |
| 217 | Inet4Address clientIp, Inet4Address yourIp, |
Erik Kline | 496906e | 2015-09-16 15:44:54 +0900 | [diff] [blame^] | 218 | byte[] netmaskBytes) throws Exception { |
Lorenzo Colitti | f68edb1 | 2015-06-02 17:46:24 +0900 | [diff] [blame] | 219 | ByteBuffer packet = new TestDhcpPacket(type, clientIp, yourIp) |
| 220 | .setNetmaskBytes(netmaskBytes) |
| 221 | .build(); |
| 222 | DhcpPacket offerPacket = DhcpPacket.decodeFullPacket(packet, ENCAP_BOOTP); |
| 223 | DhcpResults results = offerPacket.toDhcpResults(); |
| 224 | |
| 225 | if (expected != null) { |
| 226 | LinkAddress expectedAddress = new LinkAddress(expected); |
| 227 | assertEquals(expectedAddress, results.ipAddress); |
| 228 | } else { |
| 229 | assertNull(results); |
| 230 | } |
| 231 | } |
| 232 | |
| 233 | @SmallTest |
| 234 | public void testIpAddress() throws Exception { |
| 235 | byte[] slash11Netmask = new byte[] { (byte) 0xff, (byte) 0xe0, 0x00, 0x00 }; |
| 236 | byte[] slash24Netmask = new byte[] { (byte) 0xff, (byte) 0xff, (byte) 0xff, 0x00 }; |
| 237 | byte[] invalidNetmask = new byte[] { (byte) 0xff, (byte) 0xfb, (byte) 0xff, 0x00 }; |
Lorenzo Colitti | b0b3d0b | 2015-07-06 12:29:43 +0900 | [diff] [blame] | 238 | Inet4Address example1 = v4Address("192.0.2.1"); |
| 239 | Inet4Address example2 = v4Address("192.0.2.43"); |
Lorenzo Colitti | f68edb1 | 2015-06-02 17:46:24 +0900 | [diff] [blame] | 240 | |
| 241 | // A packet without any addresses is not valid. |
| 242 | checkIpAddress(null, ANY, ANY, slash24Netmask); |
| 243 | |
| 244 | // ClientIP is used iff YourIP is not present. |
| 245 | checkIpAddress("192.0.2.1/24", example2, example1, slash24Netmask); |
| 246 | checkIpAddress("192.0.2.43/11", example2, ANY, slash11Netmask); |
| 247 | checkIpAddress("192.0.2.43/11", ANY, example2, slash11Netmask); |
| 248 | |
| 249 | // Invalid netmasks are ignored. |
| 250 | checkIpAddress(null, example2, ANY, invalidNetmask); |
| 251 | |
| 252 | // If there is no netmask, implicit netmasks are used. |
| 253 | checkIpAddress("192.0.2.43/24", ANY, example2, null); |
| 254 | } |
Lorenzo Colitti | b0b3d0b | 2015-07-06 12:29:43 +0900 | [diff] [blame] | 255 | |
| 256 | private void assertDhcpResults(String ipAddress, String gateway, String dnsServersString, |
| 257 | String domains, String serverAddress, String vendorInfo, int leaseDuration, |
| 258 | boolean hasMeteredHint, DhcpResults dhcpResults) throws Exception { |
| 259 | assertEquals(new LinkAddress(ipAddress), dhcpResults.ipAddress); |
| 260 | assertEquals(v4Address(gateway), dhcpResults.gateway); |
| 261 | |
| 262 | String[] dnsServerStrings = dnsServersString.split(","); |
| 263 | ArrayList dnsServers = new ArrayList(); |
| 264 | for (String dnsServerString : dnsServerStrings) { |
| 265 | dnsServers.add(v4Address(dnsServerString)); |
| 266 | } |
| 267 | assertEquals(dnsServers, dhcpResults.dnsServers); |
| 268 | |
| 269 | assertEquals(domains, dhcpResults.domains); |
| 270 | assertEquals(v4Address(serverAddress), dhcpResults.serverAddress); |
| 271 | assertEquals(vendorInfo, dhcpResults.vendorInfo); |
| 272 | assertEquals(leaseDuration, dhcpResults.leaseDuration); |
| 273 | assertEquals(hasMeteredHint, dhcpResults.hasMeteredHint()); |
| 274 | } |
| 275 | |
| 276 | @SmallTest |
| 277 | public void testOffer1() throws Exception { |
| 278 | // TODO: Turn all of these into golden files. This will probably require modifying |
| 279 | // Android.mk appropriately, making this into an AndroidTestCase, and adding code to read |
| 280 | // the golden files from the test APK's assets via mContext.getAssets(). |
| 281 | final ByteBuffer packet = ByteBuffer.wrap(HexEncoding.decode(( |
| 282 | // IP header. |
| 283 | "451001480000000080118849c0a89003c0a89ff7" + |
| 284 | // UDP header. |
| 285 | "004300440134dcfa" + |
| 286 | // BOOTP header. |
| 287 | "02010600c997a63b0000000000000000c0a89ff70000000000000000" + |
| 288 | // MAC address. |
| 289 | "30766ff2a90c00000000000000000000" + |
| 290 | // Server name. |
| 291 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 292 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 293 | // File. |
| 294 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 295 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 296 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 297 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 298 | // Options |
| 299 | "638253633501023604c0a89003330400001c200104fffff0000304c0a89ffe06080808080808080404" + |
| 300 | "3a0400000e103b040000189cff00000000000000000000" |
| 301 | ).toCharArray(), false)); |
| 302 | |
| 303 | DhcpPacket offerPacket = DhcpPacket.decodeFullPacket(packet, ENCAP_L3); |
| 304 | assertTrue(offerPacket instanceof DhcpOfferPacket); // Implicitly checks it's non-null. |
| 305 | DhcpResults dhcpResults = offerPacket.toDhcpResults(); |
| 306 | assertDhcpResults("192.168.159.247/20", "192.168.159.254", "8.8.8.8,8.8.4.4", |
| 307 | null, "192.168.144.3", null, 7200, false, dhcpResults); |
| 308 | } |
| 309 | |
| 310 | @SmallTest |
| 311 | public void testOffer2() throws Exception { |
| 312 | final ByteBuffer packet = ByteBuffer.wrap(HexEncoding.decode(( |
| 313 | // IP header. |
| 314 | "450001518d0600004011144dc0a82b01c0a82bf7" + |
| 315 | // UDP header. |
| 316 | "00430044013d9ac7" + |
| 317 | // BOOTP header. |
| 318 | "02010600dfc23d1f0002000000000000c0a82bf7c0a82b0100000000" + |
| 319 | // MAC address. |
| 320 | "30766ff2a90c00000000000000000000" + |
| 321 | // Server name. |
| 322 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 323 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 324 | // File. |
| 325 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 326 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 327 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 328 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 329 | // Options |
| 330 | "638253633501023604c0a82b01330400000e103a04000007083b0400000c4e0104ffffff00" + |
| 331 | "1c04c0a82bff0304c0a82b010604c0a82b012b0f414e44524f49445f4d455445524544ff" |
| 332 | ).toCharArray(), false)); |
| 333 | |
| 334 | assertEquals(337, packet.limit()); |
| 335 | DhcpPacket offerPacket = DhcpPacket.decodeFullPacket(packet, ENCAP_L3); |
| 336 | assertTrue(offerPacket instanceof DhcpOfferPacket); // Implicitly checks it's non-null. |
| 337 | DhcpResults dhcpResults = offerPacket.toDhcpResults(); |
| 338 | assertDhcpResults("192.168.43.247/24", "192.168.43.1", "192.168.43.1", |
| 339 | null, "192.168.43.1", "ANDROID_METERED", 3600, true, dhcpResults); |
| 340 | assertTrue(dhcpResults.hasMeteredHint()); |
| 341 | } |
| 342 | |
| 343 | @SmallTest |
Lorenzo Colitti | d64144a | 2015-09-03 17:36:20 +0900 | [diff] [blame] | 344 | public void testBadHwaddrLength() throws Exception { |
| 345 | final ByteBuffer packet = ByteBuffer.wrap(HexEncoding.decode(( |
| 346 | // IP header. |
| 347 | "450001518d0600004011144dc0a82b01c0a82bf7" + |
| 348 | // UDP header. |
| 349 | "00430044013d9ac7" + |
| 350 | // BOOTP header. |
| 351 | "02010600dfc23d1f0002000000000000c0a82bf7c0a82b0100000000" + |
| 352 | // MAC address. |
| 353 | "30766ff2a90c00000000000000000000" + |
| 354 | // Server name. |
| 355 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 356 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 357 | // File. |
| 358 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 359 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 360 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 361 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 362 | // Options |
| 363 | "638253633501023604c0a82b01330400000e103a04000007083b0400000c4e0104ffffff00" + |
| 364 | "1c04c0a82bff0304c0a82b010604c0a82b012b0f414e44524f49445f4d455445524544ff" |
| 365 | ).toCharArray(), false)); |
| 366 | String expectedClientMac = "30766FF2A90C"; |
| 367 | |
| 368 | final int hwAddrLenOffset = 20 + 8 + 2; |
| 369 | assertEquals(6, packet.get(hwAddrLenOffset)); |
| 370 | |
| 371 | // Expect the expected. |
| 372 | DhcpPacket offerPacket = DhcpPacket.decodeFullPacket(packet, ENCAP_L3); |
| 373 | assertNotNull(offerPacket); |
| 374 | assertEquals(6, offerPacket.getClientMac().length); |
| 375 | assertEquals(expectedClientMac, HexDump.toHexString(offerPacket.getClientMac())); |
| 376 | |
| 377 | // Reduce the hardware address length and verify that it shortens the client MAC. |
| 378 | packet.flip(); |
| 379 | packet.put(hwAddrLenOffset, (byte) 5); |
| 380 | offerPacket = DhcpPacket.decodeFullPacket(packet, ENCAP_L3); |
| 381 | assertNotNull(offerPacket); |
| 382 | assertEquals(5, offerPacket.getClientMac().length); |
| 383 | assertEquals(expectedClientMac.substring(0, 10), |
| 384 | HexDump.toHexString(offerPacket.getClientMac())); |
| 385 | |
| 386 | packet.flip(); |
| 387 | packet.put(hwAddrLenOffset, (byte) 3); |
| 388 | offerPacket = DhcpPacket.decodeFullPacket(packet, ENCAP_L3); |
| 389 | assertNotNull(offerPacket); |
| 390 | assertEquals(3, offerPacket.getClientMac().length); |
| 391 | assertEquals(expectedClientMac.substring(0, 6), |
| 392 | HexDump.toHexString(offerPacket.getClientMac())); |
| 393 | |
| 394 | // Set the the hardware address length to 0xff and verify that we a) don't treat it as -1 |
| 395 | // and crash, and b) hardcode it to 6. |
| 396 | packet.flip(); |
| 397 | packet.put(hwAddrLenOffset, (byte) -1); |
| 398 | offerPacket = DhcpPacket.decodeFullPacket(packet, ENCAP_L3); |
| 399 | assertNotNull(offerPacket); |
| 400 | assertEquals(6, offerPacket.getClientMac().length); |
| 401 | assertEquals(expectedClientMac, HexDump.toHexString(offerPacket.getClientMac())); |
| 402 | |
| 403 | // Set the the hardware address length to a positive invalid value (> 16) and verify that we |
| 404 | // hardcode it to 6. |
| 405 | packet.flip(); |
| 406 | packet.put(hwAddrLenOffset, (byte) 17); |
| 407 | offerPacket = DhcpPacket.decodeFullPacket(packet, ENCAP_L3); |
| 408 | assertNotNull(offerPacket); |
| 409 | assertEquals(6, offerPacket.getClientMac().length); |
| 410 | assertEquals(expectedClientMac, HexDump.toHexString(offerPacket.getClientMac())); |
| 411 | } |
| 412 | |
| 413 | @SmallTest |
Lorenzo Colitti | b0b3d0b | 2015-07-06 12:29:43 +0900 | [diff] [blame] | 414 | public void testPadAndOverloadedOptionsOffer() throws Exception { |
| 415 | // A packet observed in the real world that is interesting for two reasons: |
| 416 | // |
| 417 | // 1. It uses pad bytes, which we previously didn't support correctly. |
| 418 | // 2. It uses DHCP option overloading, which we don't currently support (but it doesn't |
| 419 | // store any information in the overloaded fields). |
| 420 | // |
| 421 | // For now, we just check that it parses correctly. |
| 422 | final ByteBuffer packet = ByteBuffer.wrap(HexEncoding.decode(( |
| 423 | // Ethernet header. |
| 424 | "b4cef6000000e80462236e300800" + |
| 425 | // IP header. |
| 426 | "4500014c00000000ff11741701010101ac119876" + |
| 427 | // UDP header. TODO: fix invalid checksum (due to MAC address obfuscation). |
| 428 | "004300440138ae5a" + |
| 429 | // BOOTP header. |
| 430 | "020106000fa0059f0000000000000000ac1198760000000000000000" + |
| 431 | // MAC address. |
| 432 | "b4cef600000000000000000000000000" + |
| 433 | // Server name. |
| 434 | "ff00000000000000000000000000000000000000000000000000000000000000" + |
| 435 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 436 | // File. |
| 437 | "ff00000000000000000000000000000000000000000000000000000000000000" + |
| 438 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 439 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 440 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 441 | // Options |
| 442 | "638253633501023604010101010104ffff000033040000a8c03401030304ac1101010604ac110101" + |
| 443 | "0000000000000000000000000000000000000000000000ff000000" |
| 444 | ).toCharArray(), false)); |
| 445 | |
| 446 | DhcpPacket offerPacket = DhcpPacket.decodeFullPacket(packet, ENCAP_L2); |
| 447 | assertTrue(offerPacket instanceof DhcpOfferPacket); |
| 448 | DhcpResults dhcpResults = offerPacket.toDhcpResults(); |
| 449 | assertDhcpResults("172.17.152.118/16", "172.17.1.1", "172.17.1.1", |
| 450 | null, "1.1.1.1", null, 43200, false, dhcpResults); |
| 451 | } |
Lorenzo Colitti | f28e62b | 2015-07-27 16:35:22 +0900 | [diff] [blame] | 452 | |
| 453 | @SmallTest |
| 454 | public void testBug2111() throws Exception { |
| 455 | final ByteBuffer packet = ByteBuffer.wrap(HexEncoding.decode(( |
| 456 | // IP header. |
| 457 | "4500014c00000000ff119beac3eaf3880a3f5d04" + |
| 458 | // UDP header. TODO: fix invalid checksum (due to MAC address obfuscation). |
| 459 | "0043004401387464" + |
| 460 | // BOOTP header. |
| 461 | "0201060002554812000a0000000000000a3f5d040000000000000000" + |
| 462 | // MAC address. |
| 463 | "00904c00000000000000000000000000" + |
| 464 | // Server name. |
| 465 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 466 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 467 | // File. |
| 468 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 469 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 470 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 471 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 472 | // Options. |
| 473 | "638253633501023604c00002fe33040000bfc60104fffff00003040a3f50010608c0000201c0000202" + |
| 474 | "0f0f646f6d61696e3132332e636f2e756b0000000000ff00000000" |
| 475 | ).toCharArray(), false)); |
| 476 | |
| 477 | DhcpPacket offerPacket = DhcpPacket.decodeFullPacket(packet, ENCAP_L3); |
| 478 | assertTrue(offerPacket instanceof DhcpOfferPacket); |
| 479 | DhcpResults dhcpResults = offerPacket.toDhcpResults(); |
| 480 | assertDhcpResults("10.63.93.4/20", "10.63.80.1", "192.0.2.1,192.0.2.2", |
| 481 | "domain123.co.uk", "192.0.2.254", null, 49094, false, dhcpResults); |
| 482 | } |
| 483 | |
| 484 | @SmallTest |
| 485 | public void testBug2136() throws Exception { |
| 486 | final ByteBuffer packet = ByteBuffer.wrap(HexEncoding.decode(( |
| 487 | // Ethernet header. |
| 488 | "bcf5ac000000d0c7890000000800" + |
| 489 | // IP header. |
| 490 | "4500014c00000000ff119beac3eaf3880a3f5d04" + |
| 491 | // UDP header. TODO: fix invalid checksum (due to MAC address obfuscation). |
| 492 | "0043004401387574" + |
| 493 | // BOOTP header. |
| 494 | "0201060163339a3000050000000000000a209ecd0000000000000000" + |
| 495 | // MAC address. |
| 496 | "bcf5ac00000000000000000000000000" + |
| 497 | // Server name. |
| 498 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 499 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 500 | // File. |
| 501 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 502 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 503 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 504 | "0000000000000000000000000000000000000000000000000000000000000000" + |
| 505 | // Options. |
| 506 | "6382536335010236040a20ff80330400001c200104fffff00003040a20900106089458413494584135" + |
| 507 | "0f0b6c616e63732e61632e756b000000000000000000ff00000000" |
| 508 | ).toCharArray(), false)); |
| 509 | |
| 510 | DhcpPacket offerPacket = DhcpPacket.decodeFullPacket(packet, ENCAP_L2); |
| 511 | assertTrue(offerPacket instanceof DhcpOfferPacket); |
| 512 | assertEquals("BCF5AC000000", HexDump.toHexString(offerPacket.getClientMac())); |
| 513 | DhcpResults dhcpResults = offerPacket.toDhcpResults(); |
| 514 | assertDhcpResults("10.32.158.205/20", "10.32.144.1", "148.88.65.52,148.88.65.53", |
| 515 | "lancs.ac.uk", "10.32.255.128", null, 7200, false, dhcpResults); |
| 516 | } |
Lorenzo Colitti | c2abb2b | 2015-03-31 16:26:57 +0900 | [diff] [blame] | 517 | } |