Examples with DhcpPacket android.net.dhcp.DhcpPacket used on opensource projects

Example 6 with DhcpPacket

use of android.net.dhcp.DhcpPacket in project platform_frameworks_base by android.

the class DhcpPacketTest method testBadTruncatedOffer.

@SmallTest
public void testBadTruncatedOffer() throws Exception {
    final byte[] packet = HexDump.hexStringToByteArray(// IP header.
    "450001518d0600004011144dc0a82b01c0a82bf7" + // UDP header.
    "00430044013d9ac7" + // BOOTP header.
    "02010600dfc23d1f0002000000000000c0a82bf7c0a82b0100000000" + // MAC address.
    "30766ff2a90c00000000000000000000" + // Server name.
    "0000000000000000000000000000000000000000000000000000000000000000" + "0000000000000000000000000000000000000000000000000000000000000000" + // File, missing one byte
    "0000000000000000000000000000000000000000000000000000000000000000" + "0000000000000000000000000000000000000000000000000000000000000000" + "0000000000000000000000000000000000000000000000000000000000000000" + "00000000000000000000000000000000000000000000000000000000000000");
    try {
        DhcpPacket offerPacket = DhcpPacket.decodeFullPacket(packet, packet.length, ENCAP_L3);
    } catch (DhcpPacket.ParseException expected) {
        assertDhcpErrorCodes(DhcpErrorEvent.L3_TOO_SHORT, expected.errorCode);
        return;
    }
    fail("Dhcp packet parsing should have failed");
}

Example 7 with DhcpPacket

use of android.net.dhcp.DhcpPacket in project platform_frameworks_base by android.

the class DhcpPacketTest method assertLeaseTimeParses.

private void assertLeaseTimeParses(boolean expectValid, Integer rawLeaseTime, long leaseTimeMillis, byte[] leaseTimeBytes) throws Exception {
    TestDhcpPacket testPacket = new TestDhcpPacket(DHCP_MESSAGE_TYPE_OFFER);
    if (leaseTimeBytes != null) {
        testPacket.setLeaseTimeBytes(leaseTimeBytes);
    }
    ByteBuffer packet = testPacket.build();
    DhcpPacket offerPacket = null;
    if (!expectValid) {
        try {
            offerPacket = DhcpPacket.decodeFullPacket(packet, ENCAP_BOOTP);
            fail("Invalid packet parsed successfully: " + offerPacket);
        } catch (ParseException expected) {
        }
        return;
    }
    offerPacket = DhcpPacket.decodeFullPacket(packet, ENCAP_BOOTP);
    assertNotNull(offerPacket);
    assertEquals(rawLeaseTime, offerPacket.mLeaseTime);
    // Just check this doesn't crash.
    DhcpResults dhcpResults = offerPacket.toDhcpResults();
    assertEquals(leaseTimeMillis, offerPacket.getLeaseTimeMillis());
}

Example 8 with DhcpPacket

use of android.net.dhcp.DhcpPacket in project platform_frameworks_base by android.

the class DhcpPacketTest method testBadHwaddrLength.

@SmallTest
public void testBadHwaddrLength() throws Exception {
    final ByteBuffer packet = ByteBuffer.wrap(HexDump.hexStringToByteArray(// IP header.
    "450001518d0600004011144dc0a82b01c0a82bf7" + // UDP header.
    "00430044013d9ac7" + // BOOTP header.
    "02010600dfc23d1f0002000000000000c0a82bf7c0a82b0100000000" + // MAC address.
    "30766ff2a90c00000000000000000000" + // Server name.
    "0000000000000000000000000000000000000000000000000000000000000000" + "0000000000000000000000000000000000000000000000000000000000000000" + // File.
    "0000000000000000000000000000000000000000000000000000000000000000" + "0000000000000000000000000000000000000000000000000000000000000000" + "0000000000000000000000000000000000000000000000000000000000000000" + "0000000000000000000000000000000000000000000000000000000000000000" + // Options
    "638253633501023604c0a82b01330400000e103a04000007083b0400000c4e0104ffffff00" + "1c04c0a82bff0304c0a82b010604c0a82b012b0f414e44524f49445f4d455445524544ff"));
    String expectedClientMac = "30766FF2A90C";
    final int hwAddrLenOffset = 20 + 8 + 2;
    assertEquals(6, packet.get(hwAddrLenOffset));
    // Expect the expected.
    DhcpPacket offerPacket = DhcpPacket.decodeFullPacket(packet, ENCAP_L3);
    assertNotNull(offerPacket);
    assertEquals(6, offerPacket.getClientMac().length);
    assertEquals(expectedClientMac, HexDump.toHexString(offerPacket.getClientMac()));
    // Reduce the hardware address length and verify that it shortens the client MAC.
    packet.flip();
    packet.put(hwAddrLenOffset, (byte) 5);
    offerPacket = DhcpPacket.decodeFullPacket(packet, ENCAP_L3);
    assertNotNull(offerPacket);
    assertEquals(5, offerPacket.getClientMac().length);
    assertEquals(expectedClientMac.substring(0, 10), HexDump.toHexString(offerPacket.getClientMac()));
    packet.flip();
    packet.put(hwAddrLenOffset, (byte) 3);
    offerPacket = DhcpPacket.decodeFullPacket(packet, ENCAP_L3);
    assertNotNull(offerPacket);
    assertEquals(3, offerPacket.getClientMac().length);
    assertEquals(expectedClientMac.substring(0, 6), HexDump.toHexString(offerPacket.getClientMac()));
    // Set the the hardware address length to 0xff and verify that we a) don't treat it as -1
    // and crash, and b) hardcode it to 6.
    packet.flip();
    packet.put(hwAddrLenOffset, (byte) -1);
    offerPacket = DhcpPacket.decodeFullPacket(packet, ENCAP_L3);
    assertNotNull(offerPacket);
    assertEquals(6, offerPacket.getClientMac().length);
    assertEquals(expectedClientMac, HexDump.toHexString(offerPacket.getClientMac()));
    // Set the the hardware address length to a positive invalid value (> 16) and verify that we
    // hardcode it to 6.
    packet.flip();
    packet.put(hwAddrLenOffset, (byte) 17);
    offerPacket = DhcpPacket.decodeFullPacket(packet, ENCAP_L3);
    assertNotNull(offerPacket);
    assertEquals(6, offerPacket.getClientMac().length);
    assertEquals(expectedClientMac, HexDump.toHexString(offerPacket.getClientMac()));
}

Example 9 with DhcpPacket

use of android.net.dhcp.DhcpPacket in project android_frameworks_base by DirtyUnicorns.

the class DhcpPacketTest method testPadAndOverloadedOptionsOffer.

@SmallTest
public void testPadAndOverloadedOptionsOffer() throws Exception {
    // A packet observed in the real world that is interesting for two reasons:
    //
    // 1. It uses pad bytes, which we previously didn't support correctly.
    // 2. It uses DHCP option overloading, which we don't currently support (but it doesn't
    //    store any information in the overloaded fields).
    //
    // For now, we just check that it parses correctly.
    final ByteBuffer packet = ByteBuffer.wrap(HexDump.hexStringToByteArray(// Ethernet header.
    "b4cef6000000e80462236e300800" + // IP header.
    "4500014c00000000ff11741701010101ac119876" + // UDP header. TODO: fix invalid checksum (due to MAC address obfuscation).
    "004300440138ae5a" + // BOOTP header.
    "020106000fa0059f0000000000000000ac1198760000000000000000" + // MAC address.
    "b4cef600000000000000000000000000" + // Server name.
    "ff00000000000000000000000000000000000000000000000000000000000000" + "0000000000000000000000000000000000000000000000000000000000000000" + // File.
    "ff00000000000000000000000000000000000000000000000000000000000000" + "0000000000000000000000000000000000000000000000000000000000000000" + "0000000000000000000000000000000000000000000000000000000000000000" + "0000000000000000000000000000000000000000000000000000000000000000" + // Options
    "638253633501023604010101010104ffff000033040000a8c03401030304ac1101010604ac110101" + "0000000000000000000000000000000000000000000000ff000000"));
    DhcpPacket offerPacket = DhcpPacket.decodeFullPacket(packet, ENCAP_L2);
    assertTrue(offerPacket instanceof DhcpOfferPacket);
    DhcpResults dhcpResults = offerPacket.toDhcpResults();
    assertDhcpResults("172.17.152.118/16", "172.17.1.1", "172.17.1.1", null, "1.1.1.1", null, 43200, false, 0, dhcpResults);
}

Example 10 with DhcpPacket

use of android.net.dhcp.DhcpPacket in project android_frameworks_base by DirtyUnicorns.

the class DhcpPacketTest method testOffer2.

@SmallTest
public void testOffer2() throws Exception {
    final ByteBuffer packet = ByteBuffer.wrap(HexDump.hexStringToByteArray(// IP header.
    "450001518d0600004011144dc0a82b01c0a82bf7" + // UDP header.
    "00430044013d9ac7" + // BOOTP header.
    "02010600dfc23d1f0002000000000000c0a82bf7c0a82b0100000000" + // MAC address.
    "30766ff2a90c00000000000000000000" + // Server name.
    "0000000000000000000000000000000000000000000000000000000000000000" + "0000000000000000000000000000000000000000000000000000000000000000" + // File.
    "0000000000000000000000000000000000000000000000000000000000000000" + "0000000000000000000000000000000000000000000000000000000000000000" + "0000000000000000000000000000000000000000000000000000000000000000" + "0000000000000000000000000000000000000000000000000000000000000000" + // Options
    "638253633501023604c0a82b01330400000e103a04000007083b0400000c4e0104ffffff00" + "1c04c0a82bff0304c0a82b010604c0a82b012b0f414e44524f49445f4d455445524544ff"));
    assertEquals(337, packet.limit());
    DhcpPacket offerPacket = DhcpPacket.decodeFullPacket(packet, ENCAP_L3);
    // Implicitly checks it's non-null.
    assertTrue(offerPacket instanceof DhcpOfferPacket);
    DhcpResults dhcpResults = offerPacket.toDhcpResults();
    assertDhcpResults("192.168.43.247/24", "192.168.43.1", "192.168.43.1", null, "192.168.43.1", "ANDROID_METERED", 3600, true, 0, dhcpResults);
    assertTrue(dhcpResults.hasMeteredHint());
}