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Diffstat (limited to 'common/device/com/android/net/module/util/Ipv6Utils.java')
-rw-r--r--common/device/com/android/net/module/util/Ipv6Utils.java187
1 files changed, 0 insertions, 187 deletions
diff --git a/common/device/com/android/net/module/util/Ipv6Utils.java b/common/device/com/android/net/module/util/Ipv6Utils.java
deleted file mode 100644
index d5382215..00000000
--- a/common/device/com/android/net/module/util/Ipv6Utils.java
+++ /dev/null
@@ -1,187 +0,0 @@
-/*
- * Copyright (C) 2021 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 com.android.net.module.util;
-
-import static android.system.OsConstants.IPPROTO_ICMPV6;
-
-import static com.android.net.module.util.IpUtils.icmpv6Checksum;
-import static com.android.net.module.util.NetworkStackConstants.ETHER_TYPE_IPV6;
-import static com.android.net.module.util.NetworkStackConstants.ICMPV6_ECHO_REPLY_TYPE;
-import static com.android.net.module.util.NetworkStackConstants.ICMPV6_ECHO_REQUEST_TYPE;
-import static com.android.net.module.util.NetworkStackConstants.ICMPV6_NEIGHBOR_ADVERTISEMENT;
-import static com.android.net.module.util.NetworkStackConstants.ICMPV6_NEIGHBOR_SOLICITATION;
-import static com.android.net.module.util.NetworkStackConstants.ICMPV6_ROUTER_ADVERTISEMENT;
-import static com.android.net.module.util.NetworkStackConstants.ICMPV6_ROUTER_SOLICITATION;
-
-import android.net.MacAddress;
-
-import com.android.net.module.util.structs.EthernetHeader;
-import com.android.net.module.util.structs.Icmpv6Header;
-import com.android.net.module.util.structs.Ipv6Header;
-import com.android.net.module.util.structs.NaHeader;
-import com.android.net.module.util.structs.NsHeader;
-import com.android.net.module.util.structs.RaHeader;
-import com.android.net.module.util.structs.RsHeader;
-
-import java.net.Inet6Address;
-import java.nio.ByteBuffer;
-import java.nio.ByteOrder;
-
-/**
- * Utilities for IPv6 packets.
- */
-public class Ipv6Utils {
- /**
- * Build a generic ICMPv6 packet without Ethernet header.
- */
- public static ByteBuffer buildIcmpv6Packet(final Inet6Address srcIp, final Inet6Address dstIp,
- short type, short code, final ByteBuffer... options) {
- final int ipv6HeaderLen = Struct.getSize(Ipv6Header.class);
- final int icmpv6HeaderLen = Struct.getSize(Icmpv6Header.class);
- int payloadLen = 0;
- for (ByteBuffer option: options) {
- payloadLen += option.limit();
- }
- final ByteBuffer packet = ByteBuffer.allocate(ipv6HeaderLen + icmpv6HeaderLen + payloadLen);
- final Ipv6Header ipv6Header =
- new Ipv6Header((int) 0x60000000 /* version, traffic class, flowlabel */,
- icmpv6HeaderLen + payloadLen /* payload length */,
- (byte) IPPROTO_ICMPV6 /* next header */, (byte) 0xff /* hop limit */, srcIp, dstIp);
- final Icmpv6Header icmpv6Header = new Icmpv6Header(type, code, (short) 0 /* checksum */);
-
- ipv6Header.writeToByteBuffer(packet);
- icmpv6Header.writeToByteBuffer(packet);
- for (ByteBuffer option : options) {
- packet.put(option);
- // in case option might be reused by caller, restore the position and
- // limit of bytebuffer.
- option.clear();
- }
- packet.flip();
-
- // Populate the ICMPv6 checksum field.
- packet.putShort(ipv6HeaderLen + 2, icmpv6Checksum(packet, 0 /* ipOffset */,
- ipv6HeaderLen /* transportOffset */,
- (short) (icmpv6HeaderLen + payloadLen) /* transportLen */));
- return packet;
-
- }
-
- /**
- * Build a generic ICMPv6 packet(e.g., packet used in the neighbor discovery protocol).
- */
- public static ByteBuffer buildIcmpv6Packet(final MacAddress srcMac, final MacAddress dstMac,
- final Inet6Address srcIp, final Inet6Address dstIp, short type, short code,
- final ByteBuffer... options) {
- final ByteBuffer payload = buildIcmpv6Packet(srcIp, dstIp, type, code, options);
-
- final int etherHeaderLen = Struct.getSize(EthernetHeader.class);
- final ByteBuffer packet = ByteBuffer.allocate(etherHeaderLen + payload.limit());
- final EthernetHeader ethHeader =
- new EthernetHeader(dstMac, srcMac, (short) ETHER_TYPE_IPV6);
-
- ethHeader.writeToByteBuffer(packet);
- packet.put(payload);
- packet.flip();
-
- return packet;
- }
-
- /**
- * Build the ICMPv6 packet payload including payload header and specific options.
- */
- private static ByteBuffer[] buildIcmpv6Payload(final ByteBuffer payloadHeader,
- final ByteBuffer... options) {
- final ByteBuffer[] payload = new ByteBuffer[options.length + 1];
- payload[0] = payloadHeader;
- System.arraycopy(options, 0, payload, 1, options.length);
- return payload;
- }
-
- /**
- * Build an ICMPv6 Router Advertisement packet from the required specified parameters.
- */
- public static ByteBuffer buildRaPacket(final MacAddress srcMac, final MacAddress dstMac,
- final Inet6Address srcIp, final Inet6Address dstIp, final byte flags,
- final int lifetime, final long reachableTime, final long retransTimer,
- final ByteBuffer... options) {
- final RaHeader raHeader = new RaHeader((byte) 0 /* hopLimit, unspecified */,
- flags, lifetime, reachableTime, retransTimer);
- final ByteBuffer[] payload = buildIcmpv6Payload(
- ByteBuffer.wrap(raHeader.writeToBytes(ByteOrder.BIG_ENDIAN)), options);
- return buildIcmpv6Packet(srcMac, dstMac, srcIp, dstIp,
- (byte) ICMPV6_ROUTER_ADVERTISEMENT /* type */, (byte) 0 /* code */, payload);
- }
-
- /**
- * Build an ICMPv6 Neighbor Advertisement packet from the required specified parameters.
- */
- public static ByteBuffer buildNaPacket(final MacAddress srcMac, final MacAddress dstMac,
- final Inet6Address srcIp, final Inet6Address dstIp, final int flags,
- final Inet6Address target, final ByteBuffer... options) {
- final NaHeader naHeader = new NaHeader(flags, target);
- final ByteBuffer[] payload = buildIcmpv6Payload(
- ByteBuffer.wrap(naHeader.writeToBytes(ByteOrder.BIG_ENDIAN)), options);
- return buildIcmpv6Packet(srcMac, dstMac, srcIp, dstIp,
- (byte) ICMPV6_NEIGHBOR_ADVERTISEMENT /* type */, (byte) 0 /* code */, payload);
- }
-
- /**
- * Build an ICMPv6 Neighbor Solicitation packet from the required specified parameters.
- */
- public static ByteBuffer buildNsPacket(final MacAddress srcMac, final MacAddress dstMac,
- final Inet6Address srcIp, final Inet6Address dstIp,
- final Inet6Address target, final ByteBuffer... options) {
- final NsHeader nsHeader = new NsHeader(target);
- final ByteBuffer[] payload = buildIcmpv6Payload(
- ByteBuffer.wrap(nsHeader.writeToBytes(ByteOrder.BIG_ENDIAN)), options);
- return buildIcmpv6Packet(srcMac, dstMac, srcIp, dstIp,
- (byte) ICMPV6_NEIGHBOR_SOLICITATION /* type */, (byte) 0 /* code */, payload);
- }
-
- /**
- * Build an ICMPv6 Router Solicitation packet from the required specified parameters.
- */
- public static ByteBuffer buildRsPacket(final MacAddress srcMac, final MacAddress dstMac,
- final Inet6Address srcIp, final Inet6Address dstIp, final ByteBuffer... options) {
- final RsHeader rsHeader = new RsHeader((int) 0 /* reserved */);
- final ByteBuffer[] payload = buildIcmpv6Payload(
- ByteBuffer.wrap(rsHeader.writeToBytes(ByteOrder.BIG_ENDIAN)), options);
- return buildIcmpv6Packet(srcMac, dstMac, srcIp, dstIp,
- (byte) ICMPV6_ROUTER_SOLICITATION /* type */, (byte) 0 /* code */, payload);
- }
-
- /**
- * Build an ICMPv6 Echo Request packet from the required specified parameters.
- */
- public static ByteBuffer buildEchoRequestPacket(final MacAddress srcMac,
- final MacAddress dstMac, final Inet6Address srcIp, final Inet6Address dstIp) {
- final ByteBuffer payload = ByteBuffer.allocate(4); // ID and Sequence number may be zero.
- return buildIcmpv6Packet(srcMac, dstMac, srcIp, dstIp,
- (byte) ICMPV6_ECHO_REQUEST_TYPE /* type */, (byte) 0 /* code */, payload);
- }
-
- /**
- * Build an ICMPv6 Echo Reply packet without ethernet header.
- */
- public static ByteBuffer buildEchoReplyPacket(final Inet6Address srcIp,
- final Inet6Address dstIp) {
- final ByteBuffer payload = ByteBuffer.allocate(4); // ID and Sequence number may be zero.
- return buildIcmpv6Packet(srcIp, dstIp, (byte) ICMPV6_ECHO_REPLY_TYPE /* type */,
- (byte) 0 /* code */, payload);
- }
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-26 01:47:14 +0000