| /* |
| * Copyright (C) 2016 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.metrics; |
| |
| import android.os.Parcel; |
| import android.os.Parcelable; |
| import android.util.SparseArray; |
| |
| import com.android.internal.util.MessageUtils; |
| |
| /** |
| * Event class used to record error events when parsing DHCP response packets. |
| * {@hide} |
| */ |
| public final class DhcpErrorEvent implements Parcelable { |
| public static final int L2_ERROR = 1; |
| public static final int L3_ERROR = 2; |
| public static final int L4_ERROR = 3; |
| public static final int DHCP_ERROR = 4; |
| public static final int MISC_ERROR = 5; |
| |
| public static final int L2_TOO_SHORT = makeErrorCode(L2_ERROR, 1); |
| public static final int L2_WRONG_ETH_TYPE = makeErrorCode(L2_ERROR, 2); |
| |
| public static final int L3_TOO_SHORT = makeErrorCode(L3_ERROR, 1); |
| public static final int L3_NOT_IPV4 = makeErrorCode(L3_ERROR, 2); |
| public static final int L3_INVALID_IP = makeErrorCode(L3_ERROR, 3); |
| |
| public static final int L4_NOT_UDP = makeErrorCode(L4_ERROR, 1); |
| public static final int L4_WRONG_PORT = makeErrorCode(L4_ERROR, 2); |
| |
| public static final int BOOTP_TOO_SHORT = makeErrorCode(DHCP_ERROR, 1); |
| public static final int DHCP_BAD_MAGIC_COOKIE = makeErrorCode(DHCP_ERROR, 2); |
| public static final int DHCP_INVALID_OPTION_LENGTH = makeErrorCode(DHCP_ERROR, 3); |
| public static final int DHCP_NO_MSG_TYPE = makeErrorCode(DHCP_ERROR, 4); |
| public static final int DHCP_UNKNOWN_MSG_TYPE = makeErrorCode(DHCP_ERROR, 5); |
| public static final int DHCP_NO_COOKIE = makeErrorCode(DHCP_ERROR, 6); |
| |
| public static final int BUFFER_UNDERFLOW = makeErrorCode(MISC_ERROR, 1); |
| public static final int RECEIVE_ERROR = makeErrorCode(MISC_ERROR, 2); |
| public static final int PARSING_ERROR = makeErrorCode(MISC_ERROR, 3); |
| |
| public final String ifName; |
| // error code byte format (MSB to LSB): |
| // byte 0: error type |
| // byte 1: error subtype |
| // byte 2: unused |
| // byte 3: optional code |
| public final int errorCode; |
| |
| public DhcpErrorEvent(String ifName, int errorCode) { |
| this.ifName = ifName; |
| this.errorCode = errorCode; |
| } |
| |
| private DhcpErrorEvent(Parcel in) { |
| this.ifName = in.readString(); |
| this.errorCode = in.readInt(); |
| } |
| |
| @Override |
| public void writeToParcel(Parcel out, int flags) { |
| out.writeString(ifName); |
| out.writeInt(errorCode); |
| } |
| |
| @Override |
| public int describeContents() { |
| return 0; |
| } |
| |
| public static final Parcelable.Creator<DhcpErrorEvent> CREATOR |
| = new Parcelable.Creator<DhcpErrorEvent>() { |
| public DhcpErrorEvent createFromParcel(Parcel in) { |
| return new DhcpErrorEvent(in); |
| } |
| |
| public DhcpErrorEvent[] newArray(int size) { |
| return new DhcpErrorEvent[size]; |
| } |
| }; |
| |
| public static int errorCodeWithOption(int errorCode, int option) { |
| return (0xFFFF0000 & errorCode) | (0xFF & option); |
| } |
| |
| private static int makeErrorCode(int type, int subtype) { |
| return (type << 24) | ((0xFF & subtype) << 16); |
| } |
| |
| @Override |
| public String toString() { |
| return String.format("DhcpErrorEvent(%s, %s)", ifName, Decoder.constants.get(errorCode)); |
| } |
| |
| final static class Decoder { |
| static final SparseArray<String> constants = MessageUtils.findMessageNames( |
| new Class[]{DhcpErrorEvent.class}, |
| new String[]{"L2_", "L3_", "L4_", "BOOTP_", "DHCP_", "BUFFER_", "RECEIVE_", |
| "PARSING_"}); |
| } |
| } |