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 17package android.net.netlink; 18 19import static android.net.netlink.StructNlMsgHdr.NLM_F_REQUEST; 20import static android.net.netlink.StructNlMsgHdr.NLM_F_ACK; 21import static android.net.netlink.StructNlMsgHdr.NLM_F_REPLACE; 22 23import android.net.netlink.NetlinkConstants; 24import android.net.netlink.NetlinkErrorMessage; 25import android.net.netlink.NetlinkMessage; 26import android.net.netlink.StructNlMsgErr; 27import android.test.suitebuilder.annotation.SmallTest; 28import android.util.Log; 29import java.nio.ByteBuffer; 30import java.nio.ByteOrder; 31import junit.framework.TestCase; 32import libcore.util.HexEncoding; 33 34 35public class NetlinkErrorMessageTest extends TestCase { 36 private final String TAG = "NetlinkErrorMessageTest"; 37 38 // Hexadecimal representation of packet capture. 39 public static final String NLM_ERROR_OK_HEX = 40 // struct nlmsghdr 41 "24000000" + // length = 36 42 "0200" + // type = 2 (NLMSG_ERROR) 43 "0000" + // flags 44 "26350000" + // seqno 45 "64100000" + // pid = userspace process 46 // error integer 47 "00000000" + // "errno" (0 == OK) 48 // struct nlmsghdr 49 "30000000" + // length (48) of original request 50 "1C00" + // type = 28 (RTM_NEWNEIGH) 51 "0501" + // flags (NLM_F_REQUEST | NLM_F_ACK | NLM_F_REPLACE) 52 "26350000" + // seqno 53 "00000000"; // pid = kernel 54 public static final byte[] NLM_ERROR_OK = 55 HexEncoding.decode(NLM_ERROR_OK_HEX.toCharArray(), false); 56 57 @SmallTest 58 public void testParseNlmErrorOk() { 59 final ByteBuffer byteBuffer = ByteBuffer.wrap(NLM_ERROR_OK); 60 byteBuffer.order(ByteOrder.LITTLE_ENDIAN); // For testing. 61 final NetlinkMessage msg = NetlinkMessage.parse(byteBuffer); 62 assertNotNull(msg); 63 assertTrue(msg instanceof NetlinkErrorMessage); 64 final NetlinkErrorMessage errorMsg = (NetlinkErrorMessage) msg; 65 66 final StructNlMsgHdr hdr = errorMsg.getHeader(); 67 assertNotNull(hdr); 68 assertEquals(36, hdr.nlmsg_len); 69 assertEquals(NetlinkConstants.NLMSG_ERROR, hdr.nlmsg_type); 70 assertEquals(0, hdr.nlmsg_flags); 71 assertEquals(13606, hdr.nlmsg_seq); 72 assertEquals(4196, hdr.nlmsg_pid); 73 74 final StructNlMsgErr err = errorMsg.getNlMsgError(); 75 assertNotNull(err); 76 assertEquals(0, err.error); 77 assertNotNull(err.msg); 78 assertEquals(48, err.msg.nlmsg_len); 79 assertEquals(NetlinkConstants.RTM_NEWNEIGH, err.msg.nlmsg_type); 80 assertEquals((NLM_F_REQUEST | NLM_F_ACK | NLM_F_REPLACE), err.msg.nlmsg_flags); 81 assertEquals(13606, err.msg.nlmsg_seq); 82 assertEquals(0, err.msg.nlmsg_pid); 83 } 84} 85