[feature] Support IP Tunnel

    * IPv4 in IPv4
    * IPv4 in IPv6
    * IPv6 in IPv6
    * IPv6 in IPv4

1 files changed, 821 insertions, 0 deletions

diff --git a/src/packet/packet.rs b/src/packet/packet.rs
index 7e1c8ef..1b4602c 100644
--- a/src/packet/packet.rs
+++ b/src/packet/packet.rs
@@ -455,6 +455,12 @@ fn handle_l4<'a>(
     next_proto: IPProtocol,
 ) -> Result<(), PacketError> {
     match next_proto {
+        IPProtocol::IPINIP => {
+            return handle_l3(packet, input, EtherType::IPv4);
+        }
+        IPProtocol::IPV6 => {
+            return handle_l3(packet, input, EtherType::IPv6);
+        }
         IPProtocol::ICMP => {
             let result = IcmpHeader::decode(input);
             if let Ok((payload, header)) = result {
@@ -1053,4 +1059,819 @@ mod tests {
             )
         )
     }
+
+    #[test]
+    fn test_packet_handle_eth_ipv6_ipv4_tcp() {
+        /*
+         * Frame 1: 726 bytes on wire (5808 bits), 726 bytes captured (5808 bits)
+         *     Encapsulation type: Ethernet (1)
+         *     Arrival Time: Sep 21, 2020 14:46:16.992138000 CST
+         *     [Time shift for this packet: 0.000000000 seconds]
+         *     Epoch Time: 1600670776.992138000 seconds
+         *     [Time delta from previous captured frame: 0.000000000 seconds]
+         *     [Time delta from previous displayed frame: 0.000000000 seconds]
+         *     [Time since reference or first frame: 0.000000000 seconds]
+         *     Frame Number: 1
+         *     Frame Length: 726 bytes (5808 bits)
+         *     Capture Length: 726 bytes (5808 bits)
+         *     [Frame is marked: False]
+         *     [Frame is ignored: False]
+         *     [Protocols in frame: eth:ethertype:ipv6:ip:tcp:ssh]
+         *     [Coloring Rule Name: TCP]
+         *     [Coloring Rule String: tcp]
+         * Ethernet II, Src: EvocInte_36:51:3c (00:22:46:36:51:3c), Dst: EvocInte_36:51:38 (00:22:46:36:51:38)
+         *     Destination: EvocInte_36:51:38 (00:22:46:36:51:38)
+         *         Address: EvocInte_36:51:38 (00:22:46:36:51:38)
+         *         .... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
+         *         .... ...0 .... .... .... .... = IG bit: Individual address (unicast)
+         *     Source: EvocInte_36:51:3c (00:22:46:36:51:3c)
+         *         Address: EvocInte_36:51:3c (00:22:46:36:51:3c)
+         *         .... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
+         *         .... ...0 .... .... .... .... = IG bit: Individual address (unicast)
+         *     Type: IPv6 (0x86dd)
+         * Internet Protocol Version 6, Src: 2001::192:168:40:134, Dst: 2001::192:168:40:133
+         *     0110 .... = Version: 6
+         *     .... 0000 0000 .... .... .... .... .... = Traffic Class: 0x00 (DSCP: CS0, ECN: Not-ECT)
+         *         .... 0000 00.. .... .... .... .... .... = Differentiated Services Codepoint: Default (0)
+         *         .... .... ..00 .... .... .... .... .... = Explicit Congestion Notification: Not ECN-Capable Transport (0)
+         *     .... 0000 0000 0000 0000 0000 = Flow Label: 0x00000
+         *     Payload Length: 672
+         *     Next Header: IPIP (4)
+         *     Hop Limit: 64
+         *     Source Address: 2001::192:168:40:134
+         *     Destination Address: 2001::192:168:40:133
+         *     [Source Teredo Server IPv4: 0.0.0.0]
+         *     [Source Teredo Port: 65175]
+         *     [Source Teredo Client IPv4: 255.191.254.203]
+         *     [Destination Teredo Server IPv4: 0.0.0.0]
+         *     [Destination Teredo Port: 65175]
+         *     [Destination Teredo Client IPv4: 255.191.254.204]
+         * Internet Protocol Version 4, Src: 1.1.1.1, Dst: 2.2.2.2
+         *     0100 .... = Version: 4
+         *     .... 0101 = Header Length: 20 bytes (5)
+         *     Differentiated Services Field: 0x00 (DSCP: CS0, ECN: Not-ECT)
+         *         0000 00.. = Differentiated Services Codepoint: Default (0)
+         *         .... ..00 = Explicit Congestion Notification: Not ECN-Capable Transport (0)
+         *     Total Length: 672
+         *     Identification: 0x0968 (2408)
+         *     000. .... = Flags: 0x0
+         *         0... .... = Reserved bit: Not set
+         *         .0.. .... = Don't fragment: Not set
+         *         ..0. .... = More fragments: Not set
+         *     ...0 0000 0000 0000 = Fragment Offset: 0
+         *     Time to Live: 212
+         *     Protocol: TCP (6)
+         *     Header Checksum: 0xd4ea [correct]
+         *     [Header checksum status: Good]
+         *     [Calculated Checksum: 0xd4ea]
+         *     Source Address: 1.1.1.1
+         *     Destination Address: 2.2.2.2
+         * Transmission Control Protocol, Src Port: 57639, Dst Port: 22, Seq: 1, Ack: 1, Len: 632
+         *     Source Port: 57639
+         *     Destination Port: 22
+         *     [Stream index: 0]
+         *     [Conversation completeness: Incomplete (8)]
+         *     [TCP Segment Len: 632]
+         *     Sequence Number: 1    (relative sequence number)
+         *     Sequence Number (raw): 1508621024
+         *     [Next Sequence Number: 633    (relative sequence number)]
+         *     Acknowledgment Number: 1    (relative ack number)
+         *     Acknowledgment number (raw): 2828957019
+         *     0101 .... = Header Length: 20 bytes (5)
+         *     Flags: 0x018 (PSH, ACK)
+         *         000. .... .... = Reserved: Not set
+         *         ...0 .... .... = Accurate ECN: Not set
+         *         .... 0... .... = Congestion Window Reduced: Not set
+         *         .... .0.. .... = ECN-Echo: Not set
+         *         .... ..0. .... = Urgent: Not set
+         *         .... ...1 .... = Acknowledgment: Set
+         *         .... .... 1... = Push: Set
+         *         .... .... .0.. = Reset: Not set
+         *         .... .... ..0. = Syn: Not set
+         *         .... .... ...0 = Fin: Not set
+         *         [TCP Flags: ·······AP···]
+         *     Window: 28584
+         *     [Calculated window size: 28584]
+         *     [Window size scaling factor: -1 (unknown)]
+         *     Checksum: 0xc51f [correct]
+         *     [Checksum Status: Good]
+         *     [Calculated Checksum: 0xc51f]
+         *     Urgent Pointer: 0
+         *     [Timestamps]
+         *         [Time since first frame in this TCP stream: 0.000000000 seconds]
+         *         [Time since previous frame in this TCP stream: 0.000000000 seconds]
+         *     [SEQ/ACK analysis]
+         *         [Bytes in flight: 632]
+         *         [Bytes sent since last PSH flag: 632]
+         *     TCP payload (632 bytes)
+         * SSH Protocol
+         *     Packet Length (encrypted): 4fe3a948
+         *     Encrypted Packet: 9bbea8070ebb5bf1151dc9bedf7889a28f125fad51d5faa70bf234005b77aeabe449a7a5…
+         *     [Direction: client-to-server]
+         */
+
+        let bytes = [
+            0x00, 0x22, 0x46, 0x36, 0x51, 0x38, 0x00, 0x22, 0x46, 0x36, 0x51, 0x3c, 0x86, 0xdd,
+            0x60, 0x00, 0x00, 0x00, 0x02, 0xa0, 0x04, 0x40, 0x20, 0x01, 0x00, 0x00, 0x00, 0x00,
+            0x00, 0x00, 0x01, 0x92, 0x01, 0x68, 0x00, 0x40, 0x01, 0x34, 0x20, 0x01, 0x00, 0x00,
+            0x00, 0x00, 0x00, 0x00, 0x01, 0x92, 0x01, 0x68, 0x00, 0x40, 0x01, 0x33, 0x45, 0x00,
+            0x02, 0xa0, 0x09, 0x68, 0x00, 0x00, 0xd4, 0x06, 0xd4, 0xea, 0x01, 0x01, 0x01, 0x01,
+            0x02, 0x02, 0x02, 0x02, 0xe1, 0x27, 0x00, 0x16, 0x59, 0xeb, 0xba, 0xe0, 0xa8, 0x9e,
+            0x75, 0x5b, 0x50, 0x18, 0x6f, 0xa8, 0xc5, 0x1f, 0x00, 0x00, 0x4f, 0xe3, 0xa9, 0x48,
+            0x9b, 0xbe, 0xa8, 0x07, 0x0e, 0xbb, 0x5b, 0xf1, 0x15, 0x1d, 0xc9, 0xbe, 0xdf, 0x78,
+            0x89, 0xa2, 0x8f, 0x12, 0x5f, 0xad, 0x51, 0xd5, 0xfa, 0xa7, 0x0b, 0xf2, 0x34, 0x00,
+            0x5b, 0x77, 0xae, 0xab, 0xe4, 0x49, 0xa7, 0xa5, 0xa7, 0x1f, 0xda, 0x90, 0xcc, 0xe1,
+            0x8e, 0x9f, 0xe9, 0xee, 0x53, 0x59, 0xa4, 0x17, 0xf8, 0x0d, 0x40, 0xe5, 0x75, 0x97,
+            0xf0, 0x29, 0xfa, 0x7c, 0xb8, 0x12, 0x7e, 0x93, 0xbc, 0x7e, 0x0a, 0x69, 0x8f, 0x1d,
+            0x7b, 0x1a, 0x2e, 0xf6, 0xa6, 0x78, 0x67, 0x26, 0xfe, 0x8f, 0xcf, 0x5a, 0x02, 0x7d,
+            0xbb, 0x1b, 0xdb, 0xc7, 0x71, 0xee, 0xe9, 0xd9, 0xc1, 0x48, 0xbf, 0xc7, 0xcc, 0x00,
+            0x82, 0x7f, 0x69, 0x52, 0xa7, 0xe1, 0x12, 0xec, 0xf1, 0x93, 0xa8, 0x55, 0x5b, 0x33,
+            0xd3, 0x35, 0x11, 0x5d, 0xf8, 0x3d, 0x5b, 0x94, 0xc9, 0x67, 0xae, 0xba, 0xc0, 0x4a,
+            0x8b, 0x25, 0x8d, 0xbf, 0xd4, 0xcc, 0x24, 0xb7, 0x3d, 0x0f, 0x1a, 0x57, 0x20, 0x5c,
+            0x64, 0x62, 0xf7, 0x3c, 0xff, 0xaf, 0x6b, 0xf2, 0xf3, 0xca, 0xd1, 0xcb, 0x7b, 0x9f,
+            0xc1, 0x31, 0x25, 0x01, 0xd1, 0x18, 0x78, 0x81, 0xf8, 0xae, 0x61, 0x4b, 0x59, 0xa1,
+            0xbe, 0x4a, 0x94, 0x12, 0xa3, 0x05, 0x4a, 0x26, 0x85, 0xbd, 0x5e, 0x59, 0xb2, 0xc2,
+            0x24, 0xec, 0xd6, 0x94, 0x6e, 0xc5, 0x7a, 0xdf, 0x21, 0x21, 0xe4, 0x06, 0x67, 0x89,
+            0xe0, 0x76, 0x85, 0xa9, 0x00, 0x43, 0xfe, 0x72, 0x8c, 0x10, 0xe4, 0x96, 0x63, 0x1a,
+            0xe8, 0x84, 0xe1, 0x86, 0xa2, 0xa5, 0x67, 0x31, 0x67, 0x44, 0xca, 0xec, 0xe8, 0xa1,
+            0x3e, 0x5f, 0x4e, 0x71, 0x5d, 0xd4, 0x34, 0xa9, 0x3d, 0xfa, 0x6a, 0xdb, 0xfb, 0x28,
+            0x2b, 0x70, 0xcc, 0xf1, 0x3c, 0x7c, 0xf5, 0x39, 0xb5, 0xd0, 0xa2, 0x56, 0x22, 0x96,
+            0x7e, 0xc5, 0x0e, 0x66, 0x2d, 0xcd, 0x5c, 0x33, 0x43, 0x1c, 0xca, 0x17, 0x77, 0x46,
+            0xb2, 0x41, 0x06, 0x8a, 0x7c, 0x7c, 0x66, 0x06, 0x18, 0x33, 0x21, 0x16, 0x8f, 0x5a,
+            0xb7, 0xdd, 0x10, 0xa1, 0xab, 0xe9, 0x66, 0xf7, 0x90, 0x22, 0x2c, 0xbe, 0xdd, 0xad,
+            0xe1, 0x40, 0xe9, 0x21, 0x53, 0x97, 0x07, 0x97, 0x6b, 0xd6, 0x91, 0x11, 0x44, 0x4e,
+            0x9d, 0x1f, 0x57, 0x07, 0xed, 0xa2, 0xac, 0x77, 0xc0, 0x84, 0xb7, 0xc5, 0x2b, 0xaa,
+            0x17, 0xd2, 0xdb, 0x2a, 0x15, 0x47, 0x2b, 0x69, 0xf1, 0xb4, 0xb5, 0x8f, 0x98, 0xcf,
+            0x26, 0x03, 0xf0, 0x4b, 0x1a, 0xba, 0x94, 0xc4, 0x12, 0xe3, 0xd1, 0x38, 0x0c, 0x2e,
+            0x87, 0x33, 0x0f, 0xe1, 0xa6, 0xba, 0x75, 0xd0, 0xa4, 0x94, 0x80, 0x49, 0x67, 0xa8,
+            0x90, 0x31, 0x19, 0xaa, 0xf9, 0x78, 0x0d, 0xdd, 0x64, 0xe3, 0xc7, 0x0e, 0x81, 0xa7,
+            0x6b, 0x44, 0x0c, 0xb5, 0xa0, 0x25, 0x8a, 0xa2, 0xdc, 0x5e, 0xbc, 0xcd, 0xb4, 0x87,
+            0x1b, 0x6c, 0x08, 0x38, 0x63, 0xa8, 0xc1, 0xde, 0xe2, 0xa1, 0xa4, 0x19, 0x1e, 0x3c,
+            0x67, 0x3b, 0xf7, 0x7f, 0x67, 0xfb, 0x50, 0x9a, 0x06, 0x5c, 0xdd, 0xf2, 0x26, 0x2c,
+            0xb9, 0xd2, 0xbd, 0x80, 0xd5, 0xfc, 0xc5, 0x54, 0x6c, 0xc1, 0xea, 0x76, 0x3e, 0xd4,
+            0xbb, 0x57, 0x65, 0x6a, 0xf8, 0x8e, 0x3e, 0x93, 0xe5, 0x03, 0xfc, 0xce, 0xf1, 0x1c,
+            0xf3, 0x10, 0xae, 0x87, 0x78, 0x46, 0x02, 0x63, 0xc5, 0xc0, 0x41, 0xbd, 0xae, 0x46,
+            0x68, 0x0c, 0x92, 0x22, 0xa4, 0xc0, 0xce, 0xf3, 0xc4, 0xf7, 0x83, 0xa9, 0x22, 0x78,
+            0x74, 0x7f, 0x2e, 0xc1, 0xc6, 0x3b, 0x72, 0x26, 0x4b, 0x45, 0xbd, 0x1b, 0x9f, 0x66,
+            0x61, 0x46, 0xbb, 0x0f, 0xf3, 0xc5, 0x65, 0x95, 0xbc, 0xae, 0x8f, 0x37, 0xfd, 0xa3,
+            0x20, 0xb6, 0xe4, 0xa8, 0xff, 0x45, 0xa1, 0x01, 0xa1, 0x76, 0xb3, 0xad, 0x16, 0x07,
+            0x39, 0x58, 0x3b, 0x34, 0xe9, 0xe6, 0xc0, 0xee, 0x7f, 0x65, 0x6f, 0x68, 0xf4, 0x45,
+            0xa4, 0x85, 0xa7, 0x50, 0x63, 0xce, 0x0b, 0x0d, 0xbd, 0xd1, 0x20, 0xc8, 0x41, 0x37,
+            0x05, 0x1f, 0x81, 0xf3, 0x7c, 0xe7, 0x67, 0x15, 0xce, 0xad, 0x76, 0x95, 0x1a, 0x93,
+            0x4a, 0xab, 0xc4, 0xea, 0x30, 0x44, 0x13, 0x47, 0xec, 0x79, 0xa2, 0x41, 0x0c, 0xdd,
+            0x42, 0xdf, 0xbf, 0x02, 0xef, 0x9e, 0x67, 0x7e, 0x1e, 0xb0, 0x2a, 0x7f, 0x97, 0xf3,
+            0x5a, 0xbc, 0x21, 0x8d, 0xf9, 0xc3, 0x30, 0x45, 0xfe, 0x72, 0x74, 0x04, 0x53, 0x99,
+            0xe7, 0xd1, 0x2b, 0xb6, 0x3a, 0x9c, 0x84, 0x0e, 0x15, 0x5e, 0x75, 0x3b, 0xc9, 0x0e,
+            0x94, 0xe6, 0x48, 0x0e, 0x37, 0x07, 0xf8, 0xd9, 0x59, 0x4b, 0x04, 0x50,
+        ];
+
+        let mut packet = Packet::new(&bytes, bytes.len() as u32);
+        let result = packet.handle();
+        assert_eq!(result.is_ok(), true);
+
+        assert_eq!(packet.encapsulation.len(), 4);
+        assert_eq!(
+            packet.encapsulation[0],
+            Encapsulation::L2_ETH(
+                EthernetFrame {
+                    source_mac: MacAddress([0x00, 0x22, 0x46, 0x36, 0x51, 0x3c]),
+                    dest_mac: MacAddress([0x00, 0x22, 0x46, 0x36, 0x51, 0x38]),
+                    ether_type: EtherType::IPv6,
+                },
+                &bytes[14..]
+            )
+        );
+        assert_eq!(
+            packet.encapsulation[1],
+            Encapsulation::L3_IPV6(
+                IPv6Header {
+                    version: 6,
+                    dsc: 0,
+                    ecn: 0,
+                    flow_label: 0,
+                    length: 672,
+                    next_header: IPProtocol::IPINIP,
+                    hop_limit: 64,
+                    source_address: Ipv6Addr::new(0x2001, 0x0, 0x0, 0x0, 0x192, 0x168, 0x40, 0x134),
+                    dest_address: Ipv6Addr::new(0x2001, 0x0, 0x0, 0x0, 0x192, 0x168, 0x40, 0x133),
+                },
+                &bytes[54..]
+            )
+        );
+        assert_eq!(
+            packet.encapsulation[2],
+            Encapsulation::L3_IPV4(
+                IPv4Header {
+                    version: 4,
+                    ihl: 20,
+                    tos: 0,
+                    length: 672,
+                    id: 0x0968,
+                    flags: 0x0,
+                    frag_offset: 0,
+                    ttl: 212,
+                    protocol: IPProtocol::TCP,
+                    checksum: 0xd4ea,
+                    source_address: Ipv4Addr::new(1, 1, 1, 1),
+                    dest_address: Ipv4Addr::new(2, 2, 2, 2),
+                },
+                &bytes[74..]
+            )
+        );
+        assert_eq!(
+            packet.encapsulation[3],
+            Encapsulation::L4_TCP(
+                TcpHeader {
+                    source_port: 57639,
+                    dest_port: 22,
+                    seq_num: 1508621024,
+                    ack_num: 2828957019,
+                    data_offset: 20,
+                    reserved: 0,
+                    flag_urg: false,
+                    flag_ack: true,
+                    flag_psh: true,
+                    flag_rst: false,
+                    flag_syn: false,
+                    flag_fin: false,
+                    window: 28584,
+                    checksum: 0xc51f,
+                    urgent_ptr: 0,
+                    options: None,
+                },
+                &bytes[94..]
+            )
+        );
+
+        // assert_eq!(1, 0);
+    }
+
+    #[test]
+    fn test_packet_handle_eth_ipv4_ipv6_tcp() {
+        /*
+         * Frame 8: 94 bytes on wire (752 bits), 94 bytes captured (752 bits)
+         *     Encapsulation type: Ethernet (1)
+         *     Arrival Time: Dec  1, 2015 11:44:34.-817364000 CST
+         *     [Expert Info (Note/Sequence): Arrival Time: Fractional second -817364000 is invalid, the valid range is 0-1000000000]
+         *         [Arrival Time: Fractional second -817364000 is invalid, the valid range is 0-1000000000]
+         *         [Severity level: Note]
+         *         [Group: Sequence]
+         *     [Time shift for this packet: 0.000000000 seconds]
+         *     Epoch Time: -1448941474.817364000 seconds
+         *     [Time delta from previous captured frame: -0.1891105000 seconds]
+         *     [Time delta from previous displayed frame: -0.1891105000 seconds]
+         *     [Time since reference or first frame: -0.1891105000 seconds]
+         *     Frame Number: 8
+         *     Frame Length: 94 bytes (752 bits)
+         *     Capture Length: 94 bytes (752 bits)
+         *     [Frame is marked: False]
+         *     [Frame is ignored: False]
+         *     [Protocols in frame: eth:ethertype:ip:ipv6:tcp]
+         *     [Coloring Rule Name: Bad TCP]
+         *     [Coloring Rule String: tcp.analysis.flags && !tcp.analysis.window_update && !tcp.analysis.keep_alive && !tcp.analysis.keep_alive_ack]
+         * Ethernet II, Src: JuniperN_45:88:29 (2c:6b:f5:45:88:29), Dst: JuniperN_2a:a2:00 (5c:5e:ab:2a:a2:00)
+         *     Destination: JuniperN_2a:a2:00 (5c:5e:ab:2a:a2:00)
+         *         Address: JuniperN_2a:a2:00 (5c:5e:ab:2a:a2:00)
+         *         .... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
+         *         .... ...0 .... .... .... .... = IG bit: Individual address (unicast)
+         *     Source: JuniperN_45:88:29 (2c:6b:f5:45:88:29)
+         *         Address: JuniperN_45:88:29 (2c:6b:f5:45:88:29)
+         *         .... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
+         *         .... ...0 .... .... .... .... = IG bit: Individual address (unicast)
+         *     Type: IPv4 (0x0800)
+         * Internet Protocol Version 4, Src: 210.77.88.163, Dst: 59.66.4.50
+         *     0100 .... = Version: 4
+         *     .... 0101 = Header Length: 20 bytes (5)
+         *     Differentiated Services Field: 0x00 (DSCP: CS0, ECN: Not-ECT)
+         *         0000 00.. = Differentiated Services Codepoint: Default (0)
+         *         .... ..00 = Explicit Congestion Notification: Not ECN-Capable Transport (0)
+         *     Total Length: 80
+         *     Identification: 0x0b53 (2899)
+         *     000. .... = Flags: 0x0
+         *         0... .... = Reserved bit: Not set
+         *         .0.. .... = Don't fragment: Not set
+         *         ..0. .... = More fragments: Not set
+         *     ...0 0000 0000 0000 = Fragment Offset: 0
+         *     Time to Live: 59
+         *     Protocol: IPv6 (41)
+         *     Header Checksum: 0x09ce [correct]
+         *     [Header checksum status: Good]
+         *     [Calculated Checksum: 0x09ce]
+         *     Source Address: 210.77.88.163
+         *     Destination Address: 59.66.4.50
+         * Internet Protocol Version 6, Src: 2001:da8:200:900e:200:5efe:d24d:58a3, Dst: 2600:140e:6::1702:1058
+         *     0110 .... = Version: 6
+         *     .... 0000 0000 .... .... .... .... .... = Traffic Class: 0x00 (DSCP: CS0, ECN: Not-ECT)
+         *         .... 0000 00.. .... .... .... .... .... = Differentiated Services Codepoint: Default (0)
+         *         .... .... ..00 .... .... .... .... .... = Explicit Congestion Notification: Not ECN-Capable Transport (0)
+         *     .... 0000 0000 0000 0000 0000 = Flow Label: 0x00000
+         *     Payload Length: 20
+         *     Next Header: TCP (6)
+         *     Hop Limit: 64
+         *     Source Address: 2001:da8:200:900e:200:5efe:d24d:58a3
+         *     Destination Address: 2600:140e:6::1702:1058
+         *     [Source ISATAP IPv4: 210.77.88.163]
+         * Transmission Control Protocol, Src Port: 52556, Dst Port: 80, Seq: 98, Ack: 1, Len: 0
+         *     Source Port: 52556
+         *     Destination Port: 80
+         *     [Stream index: 0]
+         *     [Conversation completeness: Complete, WITH_DATA (31)]
+         *     [TCP Segment Len: 0]
+         *     Sequence Number: 98    (relative sequence number)
+         *     Sequence Number (raw): 2172673240
+         *     [Next Sequence Number: 98    (relative sequence number)]
+         *     Acknowledgment Number: 1    (relative ack number)
+         *     Acknowledgment number (raw): 3192771652
+         *     0101 .... = Header Length: 20 bytes (5)
+         *     Flags: 0x010 (ACK)
+         *         000. .... .... = Reserved: Not set
+         *         ...0 .... .... = Accurate ECN: Not set
+         *         .... 0... .... = Congestion Window Reduced: Not set
+         *         .... .0.. .... = ECN-Echo: Not set
+         *         .... ..0. .... = Urgent: Not set
+         *         .... ...1 .... = Acknowledgment: Set
+         *         .... .... 0... = Push: Not set
+         *         .... .... .0.. = Reset: Not set
+         *         .... .... ..0. = Syn: Not set
+         *         .... .... ...0 = Fin: Not set
+         *         [TCP Flags: ·······A····]
+         *     Window: 257
+         *     [Calculated window size: 65792]
+         *     [Window size scaling factor: 256]
+         *     Checksum: 0xc336 [correct]
+         *     [Checksum Status: Good]
+         *     [Calculated Checksum: 0xc336]
+         *     Urgent Pointer: 0
+         *     [Timestamps]
+         *         [Time since first frame in this TCP stream: -0.1891105000 seconds]
+         *         [Time since previous frame in this TCP stream: -0.1891105000 seconds]
+         *     [SEQ/ACK analysis]
+         *         [iRTT: -0.1891105000 seconds]
+         *         [TCP Analysis Flags]
+         *             [This is a TCP duplicate ack]
+         *         [Duplicate ACK #: 1]
+         *         [Duplicate to the ACK in frame: 3]
+         *             [Expert Info (Note/Sequence): Duplicate ACK (#1)]
+         *                 [Duplicate ACK (#1)]
+         *                 [Severity level: Note]
+         *                 [Group: Sequence]
+         */
+
+        let bytes = [
+            0x5c, 0x5e, 0xab, 0x2a, 0xa2, 0x00, 0x2c, 0x6b, 0xf5, 0x45, 0x88, 0x29, 0x08, 0x00,
+            0x45, 0x00, 0x00, 0x50, 0x0b, 0x53, 0x00, 0x00, 0x3b, 0x29, 0x09, 0xce, 0xd2, 0x4d,
+            0x58, 0xa3, 0x3b, 0x42, 0x04, 0x32, 0x60, 0x00, 0x00, 0x00, 0x00, 0x14, 0x06, 0x40,
+            0x20, 0x01, 0x0d, 0xa8, 0x02, 0x00, 0x90, 0x0e, 0x02, 0x00, 0x5e, 0xfe, 0xd2, 0x4d,
+            0x58, 0xa3, 0x26, 0x00, 0x14, 0x0e, 0x00, 0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+            0x17, 0x02, 0x10, 0x58, 0xcd, 0x4c, 0x00, 0x50, 0x81, 0x80, 0x5c, 0xd8, 0xbe, 0x4d,
+            0xd4, 0x44, 0x50, 0x10, 0x01, 0x01, 0xc3, 0x36, 0x00, 0x00,
+        ];
+
+        let mut packet = Packet::new(&bytes, bytes.len() as u32);
+        let result = packet.handle();
+        assert_eq!(result.is_ok(), true);
+
+        assert_eq!(packet.encapsulation.len(), 4);
+        assert_eq!(
+            packet.encapsulation[0],
+            Encapsulation::L2_ETH(
+                EthernetFrame {
+                    source_mac: MacAddress([0x2c, 0x6b, 0xf5, 0x45, 0x88, 0x29]),
+                    dest_mac: MacAddress([0x5c, 0x5e, 0xab, 0x2a, 0xa2, 0x00]),
+                    ether_type: EtherType::IPv4,
+                },
+                &bytes[14..]
+            )
+        );
+        assert_eq!(
+            packet.encapsulation[1],
+            Encapsulation::L3_IPV4(
+                IPv4Header {
+                    version: 4,
+                    ihl: 20,
+                    tos: 0,
+                    length: 80,
+                    id: 0x0b53,
+                    flags: 0x0,
+                    frag_offset: 0,
+                    ttl: 59,
+                    protocol: IPProtocol::IPV6,
+                    checksum: 0x09ce,
+                    source_address: Ipv4Addr::new(210, 77, 88, 163),
+                    dest_address: Ipv4Addr::new(59, 66, 4, 50),
+                },
+                &bytes[34..]
+            )
+        );
+        assert_eq!(
+            packet.encapsulation[2],
+            Encapsulation::L3_IPV6(
+                IPv6Header {
+                    version: 6,
+                    dsc: 0,
+                    ecn: 0,
+                    flow_label: 0,
+                    length: 20,
+                    next_header: IPProtocol::TCP,
+                    hop_limit: 64,
+                    source_address: Ipv6Addr::new(
+                        0x2001, 0x0da8, 0x0200, 0x900e, 0x0200, 0x5efe, 0xd24d, 0x58a3
+                    ),
+                    dest_address: Ipv6Addr::new(
+                        0x2600, 0x140e, 0x0006, 0x0000, 0x0000, 0x0000, 0x1702, 0x1058
+                    ),
+                },
+                &bytes[74..]
+            )
+        );
+        assert_eq!(
+            packet.encapsulation[3],
+            Encapsulation::L4_TCP(
+                TcpHeader {
+                    source_port: 52556,
+                    dest_port: 80,
+                    seq_num: 2172673240,
+                    ack_num: 3192771652,
+                    data_offset: 20,
+                    reserved: 0,
+                    flag_urg: false,
+                    flag_ack: true,
+                    flag_psh: false,
+                    flag_rst: false,
+                    flag_syn: false,
+                    flag_fin: false,
+                    window: 257,
+                    checksum: 0xc336,
+                    urgent_ptr: 0,
+                    options: None,
+                },
+                &bytes[94..]
+            )
+        );
+
+        // assert_eq!(1, 0);
+    }
+
+    #[test]
+    fn test_packet_handle_eth_ipv6_ipv6_udp() {
+        /*
+         * Frame 1: 106 bytes on wire (848 bits), 106 bytes captured (848 bits)
+         *     Encapsulation type: Ethernet (1)
+         *     Arrival Time: Apr 24, 2012 00:17:52.162188000 CST
+         *     [Time shift for this packet: 0.000000000 seconds]
+         *     Epoch Time: 1335197872.162188000 seconds
+         *     [Time delta from previous captured frame: 0.000000000 seconds]
+         *     [Time delta from previous displayed frame: 0.000000000 seconds]
+         *     [Time since reference or first frame: 0.000000000 seconds]
+         *     Frame Number: 1
+         *     Frame Length: 106 bytes (848 bits)
+         *     Capture Length: 106 bytes (848 bits)
+         *     [Frame is marked: False]
+         *     [Frame is ignored: False]
+         *     [Protocols in frame: eth:ethertype:ipv6:ipv6:udp:data]
+         *     [Coloring Rule Name: UDP]
+         *     [Coloring Rule String: udp]
+         * Ethernet II, Src: 00:00:00_00:00:00 (00:00:00:00:00:00), Dst: Broadcast (ff:ff:ff:ff:ff:ff)
+         *     Destination: Broadcast (ff:ff:ff:ff:ff:ff)
+         *         Address: Broadcast (ff:ff:ff:ff:ff:ff)
+         *         .... ..1. .... .... .... .... = LG bit: Locally administered address (this is NOT the factory default)
+         *         .... ...1 .... .... .... .... = IG bit: Group address (multicast/broadcast)
+         *     Source: 00:00:00_00:00:00 (00:00:00:00:00:00)
+         *         Address: 00:00:00_00:00:00 (00:00:00:00:00:00)
+         *         .... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
+         *         .... ...0 .... .... .... .... = IG bit: Individual address (unicast)
+         *     Type: IPv6 (0x86dd)
+         * Internet Protocol Version 6, Src: 2001:4f8:4:7:2e0:81ff:fe52:ffff, Dst: 2001:4f8:4:7:2e0:81ff:fe52:9a6b
+         *     0110 .... = Version: 6
+         *     .... 0000 0000 .... .... .... .... .... = Traffic Class: 0x00 (DSCP: CS0, ECN: Not-ECT)
+         *         .... 0000 00.. .... .... .... .... .... = Differentiated Services Codepoint: Default (0)
+         *         .... .... ..00 .... .... .... .... .... = Explicit Congestion Notification: Not ECN-Capable Transport (0)
+         *     .... 0000 0000 0000 0000 0000 = Flow Label: 0x00000
+         *     Payload Length: 52
+         *     Next Header: IPv6 (41)
+         *     Hop Limit: 64
+         *     Source Address: 2001:4f8:4:7:2e0:81ff:fe52:ffff
+         *     Destination Address: 2001:4f8:4:7:2e0:81ff:fe52:9a6b
+         *     [Source SLAAC MAC: TyanComp_52:ff:ff (00:e0:81:52:ff:ff)]
+         *     [Destination SLAAC MAC: TyanComp_52:9a:6b (00:e0:81:52:9a:6b)]
+         * Internet Protocol Version 6, Src: dead::beef, Dst: cafe::babe
+         *     0110 .... = Version: 6
+         *     .... 0000 0000 .... .... .... .... .... = Traffic Class: 0x00 (DSCP: CS0, ECN: Not-ECT)
+         *         .... 0000 00.. .... .... .... .... .... = Differentiated Services Codepoint: Default (0)
+         *         .... .... ..00 .... .... .... .... .... = Explicit Congestion Notification: Not ECN-Capable Transport (0)
+         *     .... 0000 0000 0000 0000 0000 = Flow Label: 0x00000
+         *     Payload Length: 12
+         *     Next Header: UDP (17)
+         *     Hop Limit: 64
+         *     Source Address: dead::beef
+         *     Destination Address: cafe::babe
+         * User Datagram Protocol, Src Port: 30000, Dst Port: 13000
+         *     Source Port: 30000
+         *     Destination Port: 13000
+         *     Length: 12
+         *     Checksum: 0x83d2 [correct]
+         *         [Calculated Checksum: 0x83d2]
+         *     [Checksum Status: Good]
+         *     [Stream index: 0]
+         *     [Timestamps]
+         *         [Time since first frame: 0.000000000 seconds]
+         *         [Time since previous frame: 0.000000000 seconds]
+         *     UDP payload (4 bytes)
+         * Data (4 bytes)
+         *     Data: 58585858
+         *     [Length: 4]
+         */
+
+        let bytes = [
+            0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x86, 0xdd,
+            0x60, 0x00, 0x00, 0x00, 0x00, 0x34, 0x29, 0x40, 0x20, 0x01, 0x04, 0xf8, 0x00, 0x04,
+            0x00, 0x07, 0x02, 0xe0, 0x81, 0xff, 0xfe, 0x52, 0xff, 0xff, 0x20, 0x01, 0x04, 0xf8,
+            0x00, 0x04, 0x00, 0x07, 0x02, 0xe0, 0x81, 0xff, 0xfe, 0x52, 0x9a, 0x6b, 0x60, 0x00,
+            0x00, 0x00, 0x00, 0x0c, 0x11, 0x40, 0xde, 0xad, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xbe, 0xef, 0xca, 0xfe, 0x00, 0x00, 0x00, 0x00,
+            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xba, 0xbe, 0x75, 0x30, 0x32, 0xc8,
+            0x00, 0x0c, 0x83, 0xd2, 0x58, 0x58, 0x58, 0x58,
+        ];
+
+        let mut packet = Packet::new(&bytes, bytes.len() as u32);
+        let result = packet.handle();
+        assert_eq!(result.is_ok(), true);
+
+        assert_eq!(packet.encapsulation.len(), 4);
+        assert_eq!(
+            packet.encapsulation[0],
+            Encapsulation::L2_ETH(
+                EthernetFrame {
+                    source_mac: MacAddress([0x00, 0x00, 0x00, 0x00, 0x00, 0x00]),
+                    dest_mac: MacAddress([0xff, 0xff, 0xff, 0xff, 0xff, 0xff]),
+                    ether_type: EtherType::IPv6,
+                },
+                &bytes[14..]
+            )
+        );
+        assert_eq!(
+            packet.encapsulation[1],
+            Encapsulation::L3_IPV6(
+                IPv6Header {
+                    version: 6,
+                    dsc: 0,
+                    ecn: 0,
+                    flow_label: 0,
+                    length: 52,
+                    next_header: IPProtocol::IPV6,
+                    hop_limit: 64,
+                    source_address: Ipv6Addr::new(
+                        0x2001, 0x04f8, 0x0004, 0x0007, 0x02e0, 0x81ff, 0xfe52, 0xffff
+                    ),
+                    dest_address: Ipv6Addr::new(
+                        0x2001, 0x04f8, 0x0004, 0x0007, 0x02e0, 0x81ff, 0xfe52, 0x9a6b
+                    ),
+                },
+                &bytes[54..]
+            )
+        );
+        assert_eq!(
+            packet.encapsulation[2],
+            Encapsulation::L3_IPV6(
+                IPv6Header {
+                    version: 6,
+                    dsc: 0,
+                    ecn: 0,
+                    flow_label: 0,
+                    length: 12,
+                    next_header: IPProtocol::UDP,
+                    hop_limit: 64,
+                    source_address: Ipv6Addr::new(
+                        0xdead, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0xbeef
+                    ),
+                    dest_address: Ipv6Addr::new(
+                        0xcafe, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0xbabe
+                    ),
+                },
+                &bytes[94..]
+            )
+        );
+        assert_eq!(
+            packet.encapsulation[3],
+            Encapsulation::L4_UDP(
+                UdpHeader {
+                    source_port: 30000,
+                    dest_port: 13000,
+                    length: 12,
+                    checksum: 0x83d2,
+                },
+                &bytes[102..]
+            )
+        );
+
+        // assert_eq!(1, 0);
+    }
+
+    #[test]
+    fn test_packet_handle_eth_vlan_vlan_ipv4_ipv4_udp() {
+        /*
+         * Frame 1: 170 bytes on wire (1360 bits), 170 bytes captured (1360 bits)
+         *     Encapsulation type: Ethernet (1)
+         *     Arrival Time: Sep 16, 2018 04:44:31.794779000 CST
+         *     [Time shift for this packet: 0.000000000 seconds]
+         *     Epoch Time: 1537044271.794779000 seconds
+         *     [Time delta from previous captured frame: 0.000000000 seconds]
+         *     [Time delta from previous displayed frame: 0.000000000 seconds]
+         *     [Time since reference or first frame: 0.000000000 seconds]
+         *     Frame Number: 1
+         *     Frame Length: 170 bytes (1360 bits)
+         *     Capture Length: 170 bytes (1360 bits)
+         *     [Frame is marked: False]
+         *     [Frame is ignored: False]
+         *     [Protocols in frame: eth:ethertype:vlan:ethertype:vlan:ethertype:ip:ip:udp:data]
+         *     [Coloring Rule Name: UDP]
+         *     [Coloring Rule String: udp]
+         * Ethernet II, Src: HuaweiTe_3b:b3:9a (a4:c6:4f:3b:b3:9a), Dst: 00:00:00_00:00:04 (00:00:00:00:00:04)
+         *     Destination: 00:00:00_00:00:04 (00:00:00:00:00:04)
+         *         Address: 00:00:00_00:00:04 (00:00:00:00:00:04)
+         *         .... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
+         *         .... ...0 .... .... .... .... = IG bit: Individual address (unicast)
+         *     Source: HuaweiTe_3b:b3:9a (a4:c6:4f:3b:b3:9a)
+         *         Address: HuaweiTe_3b:b3:9a (a4:c6:4f:3b:b3:9a)
+         *         .... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
+         *         .... ...0 .... .... .... .... = IG bit: Individual address (unicast)
+         *     Type: 802.1Q Virtual LAN (0x8100)
+         * 802.1Q Virtual LAN, PRI: 3, DEI: 0, ID: 1624
+         *     011. .... .... .... = Priority: Critical Applications (3)
+         *     ...0 .... .... .... = DEI: Ineligible
+         *     .... 0110 0101 1000 = ID: 1624
+         *     Type: 802.1Q Virtual LAN (0x8100)
+         * 802.1Q Virtual LAN, PRI: 3, DEI: 0, ID: 505
+         *     011. .... .... .... = Priority: Critical Applications (3)
+         *     ...0 .... .... .... = DEI: Ineligible
+         *     .... 0001 1111 1001 = ID: 505
+         *     Type: IPv4 (0x0800)
+         * Internet Protocol Version 4, Src: 69.67.35.146, Dst: 41.202.46.110
+         *     0100 .... = Version: 4
+         *     .... 0101 = Header Length: 20 bytes (5)
+         *     Differentiated Services Field: 0xb8 (DSCP: EF PHB, ECN: Not-ECT)
+         *         1011 10.. = Differentiated Services Codepoint: Expedited Forwarding (46)
+         *         .... ..00 = Explicit Congestion Notification: Not ECN-Capable Transport (0)
+         *     Total Length: 148
+         *     Identification: 0xe858 (59480)
+         *     000. .... = Flags: 0x0
+         *         0... .... = Reserved bit: Not set
+         *         .0.. .... = Don't fragment: Not set
+         *         ..0. .... = More fragments: Not set
+         *     ...0 0000 0000 0000 = Fragment Offset: 0
+         *     Time to Live: 255
+         *     Protocol: IPIP (4)
+         *     Header Checksum: 0x1148 [correct]
+         *     [Header checksum status: Good]
+         *     [Calculated Checksum: 0x1148]
+         *     Source Address: 69.67.35.146
+         *     Destination Address: 41.202.46.110
+         * Internet Protocol Version 4, Src: 10.10.100.25, Dst: 10.10.101.2
+         *     0100 .... = Version: 4
+         *     .... 0101 = Header Length: 20 bytes (5)
+         *     Differentiated Services Field: 0xb8 (DSCP: EF PHB, ECN: Not-ECT)
+         *         1011 10.. = Differentiated Services Codepoint: Expedited Forwarding (46)
+         *         .... ..00 = Explicit Congestion Notification: Not ECN-Capable Transport (0)
+         *     Total Length: 128
+         *     Identification: 0x0001 (1)
+         *     000. .... = Flags: 0x0
+         *         0... .... = Reserved bit: Not set
+         *         .0.. .... = Don't fragment: Not set
+         *         ..0. .... = More fragments: Not set
+         *     ...0 0000 0000 0000 = Fragment Offset: 0
+         *     Time to Live: 254
+         *     Protocol: UDP (17)
+         *     Header Checksum: 0xde84 [correct]
+         *     [Header checksum status: Good]
+         *     [Calculated Checksum: 0xde84]
+         *     Source Address: 10.10.100.25
+         *     Destination Address: 10.10.101.2
+         * User Datagram Protocol, Src Port: 62367, Dst Port: 17000
+         *     Source Port: 62367
+         *     Destination Port: 17000
+         *     Length: 108
+         *     Checksum: 0x4b9a [correct]
+         *         [Calculated Checksum: 0x4b9a]
+         *     [Checksum Status: Good]
+         *     [Stream index: 0]
+         *     [Timestamps]
+         *         [Time since first frame: 0.000000000 seconds]
+         *         [Time since previous frame: 0.000000000 seconds]
+         *     UDP payload (100 bytes)
+         * Data (100 bytes)
+         *     Data: 0002000004736c100000000000010000abcdabcdabcdabcdabcdabcdabcdabcdabcdabcd…
+         *     [Length: 100]
+         */
+
+        let bytes = [
+            0x00, 0x00, 0x00, 0x00, 0x00, 0x04, 0xa4, 0xc6, 0x4f, 0x3b, 0xb3, 0x9a, 0x81, 0x00,
+            0x66, 0x58, 0x81, 0x00, 0x61, 0xf9, 0x08, 0x00, 0x45, 0xb8, 0x00, 0x94, 0xe8, 0x58,
+            0x00, 0x00, 0xff, 0x04, 0x11, 0x48, 0x45, 0x43, 0x23, 0x92, 0x29, 0xca, 0x2e, 0x6e,
+            0x45, 0xb8, 0x00, 0x80, 0x00, 0x01, 0x00, 0x00, 0xfe, 0x11, 0xde, 0x84, 0x0a, 0x0a,
+            0x64, 0x19, 0x0a, 0x0a, 0x65, 0x02, 0xf3, 0x9f, 0x42, 0x68, 0x00, 0x6c, 0x4b, 0x9a,
+            0x00, 0x02, 0x00, 0x00, 0x04, 0x73, 0x6c, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
+            0x00, 0x00, 0xab, 0xcd, 0xab, 0xcd, 0xab, 0xcd, 0xab, 0xcd, 0xab, 0xcd, 0xab, 0xcd,
+            0xab, 0xcd, 0xab, 0xcd, 0xab, 0xcd, 0xab, 0xcd, 0xab, 0xcd, 0xab, 0xcd, 0xab, 0xcd,
+            0xab, 0xcd, 0xab, 0xcd, 0xab, 0xcd, 0xab, 0xcd, 0xab, 0xcd, 0xab, 0xcd, 0xab, 0xcd,
+            0xab, 0xcd, 0xab, 0xcd, 0xab, 0xcd, 0xab, 0xcd, 0xab, 0xcd, 0xab, 0xcd, 0xab, 0xcd,
+            0xab, 0xcd, 0xab, 0xcd, 0xab, 0xcd, 0xab, 0xcd, 0xab, 0xcd, 0xab, 0xcd, 0xab, 0xcd,
+            0xab, 0xcd, 0xab, 0xcd, 0xab, 0xcd, 0xab, 0xcd, 0xab, 0xcd, 0xab, 0xcd, 0xab, 0xcd,
+            0xab, 0xcd,
+        ];
+
+        let mut packet = Packet::new(&bytes, bytes.len() as u32);
+        let result = packet.handle();
+        assert_eq!(result.is_ok(), true);
+
+        assert_eq!(packet.encapsulation.len(), 6);
+        assert_eq!(
+            packet.encapsulation[0],
+            Encapsulation::L2_ETH(
+                EthernetFrame {
+                    source_mac: MacAddress([0xa4, 0xc6, 0x4f, 0x3b, 0xb3, 0x9a]),
+                    dest_mac: MacAddress([0x00, 0x00, 0x00, 0x00, 0x00, 0x04]),
+                    ether_type: EtherType::VLAN,
+                },
+                &bytes[14..]
+            )
+        );
+        assert_eq!(
+            packet.encapsulation[1],
+            Encapsulation::L2_VLAN(
+                VlanHeader {
+                    priority_code_point: 3,
+                    drop_eligible_indicator: false,
+                    vlan_identifier: 1624,
+                    ether_type: EtherType::VLAN,
+                },
+                &bytes[18..]
+            )
+        );
+        assert_eq!(
+            packet.encapsulation[2],
+            Encapsulation::L2_VLAN(
+                VlanHeader {
+                    priority_code_point: 3,
+                    drop_eligible_indicator: false,
+                    vlan_identifier: 505,
+                    ether_type: EtherType::IPv4,
+                },
+                &bytes[22..]
+            )
+        );
+        assert_eq!(
+            packet.encapsulation[3],
+            Encapsulation::L3_IPV4(
+                IPv4Header {
+                    version: 4,
+                    ihl: 20,
+                    tos: 0xb8,
+                    length: 148,
+                    id: 0xe858,
+                    flags: 0x0,
+                    frag_offset: 0,
+                    ttl: 255,
+                    protocol: IPProtocol::IPINIP,
+                    checksum: 0x1148,
+                    source_address: Ipv4Addr::new(69, 67, 35, 146),
+                    dest_address: Ipv4Addr::new(41, 202, 46, 110),
+                },
+                &bytes[42..]
+            )
+        );
+        assert_eq!(
+            packet.encapsulation[4],
+            Encapsulation::L3_IPV4(
+                IPv4Header {
+                    version: 4,
+                    ihl: 20,
+                    tos: 0xb8,
+                    length: 128,
+                    id: 0x0001,
+                    flags: 0x0,
+                    frag_offset: 0,
+                    ttl: 254,
+                    protocol: IPProtocol::UDP,
+                    checksum: 0xde84,
+                    source_address: Ipv4Addr::new(10, 10, 100, 25),
+                    dest_address: Ipv4Addr::new(10, 10, 101, 2),
+                },
+                &bytes[62..]
+            )
+        );
+        assert_eq!(
+            packet.encapsulation[5],
+            Encapsulation::L4_UDP(
+                UdpHeader {
+                    source_port: 62367,
+                    dest_port: 17000,
+                    length: 108,
+                    checksum: 0x4b9a,
+                },
+                &bytes[70..]
+            )
+        );
+
+        // assert_eq!(1, 0);
+    }
 }