Examples with StructNlMsgHdr android.net.netlink.StructNlMsgHdr used on opensource projects

Example 1 with StructNlMsgHdr

use of android.net.netlink.StructNlMsgHdr in project android_frameworks_base by ResurrectionRemix.

the class RtNetlinkNeighborMessage method newNewNeighborMessage.

/**
     * A convenience method to create an RTM_NEWNEIGH message, to modify
     * the kernel's state information for a specific neighbor.
     */
public static byte[] newNewNeighborMessage(int seqNo, InetAddress ip, short nudState, int ifIndex, byte[] llAddr) {
    final StructNlMsgHdr nlmsghdr = new StructNlMsgHdr();
    nlmsghdr.nlmsg_type = NetlinkConstants.RTM_NEWNEIGH;
    nlmsghdr.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK | NLM_F_REPLACE;
    nlmsghdr.nlmsg_seq = seqNo;
    final RtNetlinkNeighborMessage msg = new RtNetlinkNeighborMessage(nlmsghdr);
    msg.mNdmsg = new StructNdMsg();
    msg.mNdmsg.ndm_family = (byte) ((ip instanceof Inet6Address) ? OsConstants.AF_INET6 : OsConstants.AF_INET);
    msg.mNdmsg.ndm_ifindex = ifIndex;
    msg.mNdmsg.ndm_state = nudState;
    msg.mDestination = ip;
    // might be null
    msg.mLinkLayerAddr = llAddr;
    final byte[] bytes = new byte[msg.getRequiredSpace()];
    nlmsghdr.nlmsg_len = bytes.length;
    final ByteBuffer byteBuffer = ByteBuffer.wrap(bytes);
    byteBuffer.order(ByteOrder.nativeOrder());
    msg.pack(byteBuffer);
    return bytes;
}

Example 2 with StructNlMsgHdr

use of android.net.netlink.StructNlMsgHdr in project android_frameworks_base by ResurrectionRemix.

the class RtNetlinkNeighborMessageTest method testParseRtmDelNeigh.

public void testParseRtmDelNeigh() {
    final ByteBuffer byteBuffer = ByteBuffer.wrap(RTM_DELNEIGH);
    // For testing.
    byteBuffer.order(ByteOrder.LITTLE_ENDIAN);
    final NetlinkMessage msg = NetlinkMessage.parse(byteBuffer);
    assertNotNull(msg);
    assertTrue(msg instanceof RtNetlinkNeighborMessage);
    final RtNetlinkNeighborMessage neighMsg = (RtNetlinkNeighborMessage) msg;
    final StructNlMsgHdr hdr = neighMsg.getHeader();
    assertNotNull(hdr);
    assertEquals(76, hdr.nlmsg_len);
    assertEquals(NetlinkConstants.RTM_DELNEIGH, hdr.nlmsg_type);
    assertEquals(0, hdr.nlmsg_flags);
    assertEquals(0, hdr.nlmsg_seq);
    assertEquals(0, hdr.nlmsg_pid);
    final StructNdMsg ndmsgHdr = neighMsg.getNdHeader();
    assertNotNull(ndmsgHdr);
    assertEquals((byte) OsConstants.AF_INET, ndmsgHdr.ndm_family);
    assertEquals(21, ndmsgHdr.ndm_ifindex);
    assertEquals(StructNdMsg.NUD_STALE, ndmsgHdr.ndm_state);
    final InetAddress destination = neighMsg.getDestination();
    assertNotNull(destination);
    assertEquals(InetAddress.parseNumericAddress("192.168.159.254"), destination);
}

Example 3 with StructNlMsgHdr

use of android.net.netlink.StructNlMsgHdr in project android_frameworks_base by DirtyUnicorns.

the class NetlinkMessage method parse.

public static NetlinkMessage parse(ByteBuffer byteBuffer) {
    final int startPosition = (byteBuffer != null) ? byteBuffer.position() : -1;
    final StructNlMsgHdr nlmsghdr = StructNlMsgHdr.parse(byteBuffer);
    if (nlmsghdr == null) {
        return null;
    }
    int payloadLength = NetlinkConstants.alignedLengthOf(nlmsghdr.nlmsg_len);
    payloadLength -= StructNlMsgHdr.STRUCT_SIZE;
    if (payloadLength < 0 || payloadLength > byteBuffer.remaining()) {
        // Malformed message or runt buffer.  Pretend the buffer was consumed.
        byteBuffer.position(byteBuffer.limit());
        return null;
    }
    switch(nlmsghdr.nlmsg_type) {
        //case NetlinkConstants.NLMSG_NOOP:
        case NetlinkConstants.NLMSG_ERROR:
            return (NetlinkMessage) NetlinkErrorMessage.parse(nlmsghdr, byteBuffer);
        case NetlinkConstants.NLMSG_DONE:
            byteBuffer.position(byteBuffer.position() + payloadLength);
            return new NetlinkMessage(nlmsghdr);
        //case NetlinkConstants.NLMSG_OVERRUN:
        case NetlinkConstants.RTM_NEWNEIGH:
        case NetlinkConstants.RTM_DELNEIGH:
        case NetlinkConstants.RTM_GETNEIGH:
            return (NetlinkMessage) RtNetlinkNeighborMessage.parse(nlmsghdr, byteBuffer);
        default:
            if (nlmsghdr.nlmsg_type <= NetlinkConstants.NLMSG_MAX_RESERVED) {
                // Netlink control message.  Just parse the header for now,
                // pretending the whole message was consumed.
                byteBuffer.position(byteBuffer.position() + payloadLength);
                return new NetlinkMessage(nlmsghdr);
            }
            return null;
    }
}

Example 4 with StructNlMsgHdr

use of android.net.netlink.StructNlMsgHdr in project android_frameworks_base by DirtyUnicorns.

the class NetlinkSocketTest method testBasicWorkingGetNeighborsQuery.

public void testBasicWorkingGetNeighborsQuery() throws Exception {
    NetlinkSocket s = new NetlinkSocket(OsConstants.NETLINK_ROUTE);
    assertNotNull(s);
    s.connectToKernel();
    NetlinkSocketAddress localAddr = s.getLocalAddress();
    assertNotNull(localAddr);
    assertEquals(0, localAddr.getGroupsMask());
    assertTrue(0 != localAddr.getPortId());
    final int TEST_SEQNO = 5;
    final byte[] request = RtNetlinkNeighborMessage.newGetNeighborsRequest(TEST_SEQNO);
    assertNotNull(request);
    final long TIMEOUT = 500;
    assertTrue(s.sendMessage(request, 0, request.length, TIMEOUT));
    int neighMessageCount = 0;
    int doneMessageCount = 0;
    while (doneMessageCount == 0) {
        ByteBuffer response = null;
        response = s.recvMessage(TIMEOUT);
        assertNotNull(response);
        assertTrue(StructNlMsgHdr.STRUCT_SIZE <= response.limit());
        assertEquals(0, response.position());
        assertEquals(ByteOrder.nativeOrder(), response.order());
        // Verify the messages at least appears minimally reasonable.
        while (response.remaining() > 0) {
            final NetlinkMessage msg = NetlinkMessage.parse(response);
            assertNotNull(msg);
            final StructNlMsgHdr hdr = msg.getHeader();
            assertNotNull(hdr);
            if (hdr.nlmsg_type == NetlinkConstants.NLMSG_DONE) {
                doneMessageCount++;
                continue;
            }
            assertEquals(NetlinkConstants.RTM_NEWNEIGH, hdr.nlmsg_type);
            assertTrue(msg instanceof RtNetlinkNeighborMessage);
            assertTrue((hdr.nlmsg_flags & StructNlMsgHdr.NLM_F_MULTI) != 0);
            assertEquals(TEST_SEQNO, hdr.nlmsg_seq);
            assertEquals(localAddr.getPortId(), hdr.nlmsg_pid);
            neighMessageCount++;
        }
    }
    assertEquals(1, doneMessageCount);
    // TODO: make sure this test passes sanely in airplane mode.
    assertTrue(neighMessageCount > 0);
    s.close();
}

Example 5 with StructNlMsgHdr

use of android.net.netlink.StructNlMsgHdr in project android_frameworks_base by DirtyUnicorns.

the class RtNetlinkNeighborMessageTest method testParseRtmGetNeighResponse.

public void testParseRtmGetNeighResponse() {
    final ByteBuffer byteBuffer = ByteBuffer.wrap(RTM_GETNEIGH_RESPONSE);
    // For testing.
    byteBuffer.order(ByteOrder.LITTLE_ENDIAN);
    int messageCount = 0;
    while (byteBuffer.remaining() > 0) {
        final NetlinkMessage msg = NetlinkMessage.parse(byteBuffer);
        assertNotNull(msg);
        assertTrue(msg instanceof RtNetlinkNeighborMessage);
        final RtNetlinkNeighborMessage neighMsg = (RtNetlinkNeighborMessage) msg;
        final StructNlMsgHdr hdr = neighMsg.getHeader();
        assertNotNull(hdr);
        assertEquals(NetlinkConstants.RTM_NEWNEIGH, hdr.nlmsg_type);
        assertEquals(StructNlMsgHdr.NLM_F_MULTI, hdr.nlmsg_flags);
        assertEquals(0, hdr.nlmsg_seq);
        assertEquals(11070, hdr.nlmsg_pid);
        messageCount++;
    }
    // TODO: add more detailed spot checks.
    assertEquals(14, messageCount);
}