02cc5a030a
- netlink from core to services/net/netlink
- IpReachabilityMonitor from core to services/net/ip
Change-Id: I45ac3f591bade45dd5ec441111b02b621234c0e4
121 lines
4.7 KiB
Java
121 lines
4.7 KiB
Java
/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.net.netlink;
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import android.system.OsConstants;
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import com.android.internal.util.HexDump;
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import java.nio.ByteBuffer;
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/**
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* Various constants and static helper methods for netlink communications.
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*
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* Values taken from:
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*
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* <linux_src>/include/uapi/linux/netlink.h
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* <linux_src>/include/uapi/linux/rtnetlink.h
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*
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* @hide
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*/
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public class NetlinkConstants {
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private NetlinkConstants() {}
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public static final int NLA_ALIGNTO = 4;
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public static final int alignedLengthOf(short length) {
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final int intLength = (int) length & 0xffff;
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return alignedLengthOf(intLength);
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}
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public static final int alignedLengthOf(int length) {
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if (length <= 0) { return 0; }
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return (((length + NLA_ALIGNTO - 1) / NLA_ALIGNTO) * NLA_ALIGNTO);
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}
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public static String stringForAddressFamily(int family) {
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if (family == OsConstants.AF_INET) { return "AF_INET"; }
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if (family == OsConstants.AF_INET6) { return "AF_INET6"; }
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if (family == OsConstants.AF_NETLINK) { return "AF_NETLINK"; }
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return String.valueOf(family);
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}
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public static String hexify(byte[] bytes) {
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if (bytes == null) { return "(null)"; }
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return HexDump.toHexString(bytes);
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}
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public static String hexify(ByteBuffer buffer) {
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if (buffer == null) { return "(null)"; }
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return HexDump.toHexString(
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buffer.array(), buffer.position(), buffer.remaining());
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}
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// Known values for struct nlmsghdr nlm_type.
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public static final short NLMSG_NOOP = 1; // Nothing
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public static final short NLMSG_ERROR = 2; // Error
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public static final short NLMSG_DONE = 3; // End of a dump
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public static final short NLMSG_OVERRUN = 4; // Data lost
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public static final short NLMSG_MAX_RESERVED = 15; // Max reserved value
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public static final short RTM_NEWLINK = 16;
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public static final short RTM_DELLINK = 17;
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public static final short RTM_GETLINK = 18;
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public static final short RTM_SETLINK = 19;
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public static final short RTM_NEWADDR = 20;
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public static final short RTM_DELADDR = 21;
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public static final short RTM_GETADDR = 22;
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public static final short RTM_NEWROUTE = 24;
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public static final short RTM_DELROUTE = 25;
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public static final short RTM_GETROUTE = 26;
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public static final short RTM_NEWNEIGH = 28;
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public static final short RTM_DELNEIGH = 29;
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public static final short RTM_GETNEIGH = 30;
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public static final short RTM_NEWRULE = 32;
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public static final short RTM_DELRULE = 33;
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public static final short RTM_GETRULE = 34;
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public static final short RTM_NEWNDUSEROPT = 68;
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public static String stringForNlMsgType(short nlm_type) {
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switch (nlm_type) {
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case NLMSG_NOOP: return "NLMSG_NOOP";
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case NLMSG_ERROR: return "NLMSG_ERROR";
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case NLMSG_DONE: return "NLMSG_DONE";
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case NLMSG_OVERRUN: return "NLMSG_OVERRUN";
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case RTM_NEWLINK: return "RTM_NEWLINK";
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case RTM_DELLINK: return "RTM_DELLINK";
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case RTM_GETLINK: return "RTM_GETLINK";
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case RTM_SETLINK: return "RTM_SETLINK";
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case RTM_NEWADDR: return "RTM_NEWADDR";
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case RTM_DELADDR: return "RTM_DELADDR";
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case RTM_GETADDR: return "RTM_GETADDR";
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case RTM_NEWROUTE: return "RTM_NEWROUTE";
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case RTM_DELROUTE: return "RTM_DELROUTE";
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case RTM_GETROUTE: return "RTM_GETROUTE";
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case RTM_NEWNEIGH: return "RTM_NEWNEIGH";
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case RTM_DELNEIGH: return "RTM_DELNEIGH";
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case RTM_GETNEIGH: return "RTM_GETNEIGH";
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case RTM_NEWRULE: return "RTM_NEWRULE";
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case RTM_DELRULE: return "RTM_DELRULE";
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case RTM_GETRULE: return "RTM_GETRULE";
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case RTM_NEWNDUSEROPT: return "RTM_NEWNDUSEROPT";
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default:
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return "unknown RTM type: " + String.valueOf(nlm_type);
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}
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}
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}
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