diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 78e1654..22ba14b 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -1,4 +1,5 @@
 add_subdirectory(timestamp)
 add_subdirectory(tuple)
+add_subdirectory(packet)
 add_subdirectory(session)
 add_subdirectory(stellar)
\ No newline at end of file
diff --git a/src/packet/CMakeLists.txt b/src/packet/CMakeLists.txt
new file mode 100644
index 0000000..fd771a3
--- /dev/null
+++ b/src/packet/CMakeLists.txt
@@ -0,0 +1,20 @@
+###############################################################################
+# packet
+###############################################################################
+
+add_library(packet packet.cpp)
+target_include_directories(packet PUBLIC ${CMAKE_SOURCE_DIR}/src/packet)
+target_include_directories(packet PUBLIC ${CMAKE_SOURCE_DIR}/src/tuple)
+target_include_directories(packet PUBLIC ${CMAKE_SOURCE_DIR}/deps/uthash)
+target_link_libraries(packet tuple)
+
+###############################################################################
+# gtest
+###############################################################################
+
+add_executable(gtest_packet gtest_packet.cpp)
+target_include_directories(gtest_packet PUBLIC ${CMAKE_CURRENT_LIST_DIR})
+target_link_libraries(gtest_packet packet gtest)
+
+include(GoogleTest)
+gtest_discover_tests(gtest_packet)
\ No newline at end of file
diff --git a/src/packet/gtest_packet.cpp b/src/packet/gtest_packet.cpp
new file mode 100644
index 0000000..f0ed264
--- /dev/null
+++ b/src/packet/gtest_packet.cpp
@@ -0,0 +1,2706 @@
+#include <gtest/gtest.h>
+#include <arpa/inet.h>
+
+#include "packet.h"
+
+/******************************************************************************
+ * Pcap file: 1-ETH_VLAN_VLAN_IP4_IP4_UDP.pcap
+ * [Protocols in frame: eth:ethertype:vlan:ethertype:vlan:ethertype:ip:ip:udp:data]
+ ******************************************************************************
+ *
+ * Frame 1: 170 bytes on wire (1360 bits), 170 bytes captured (1360 bits)
+ * 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)
+ * 	Source: HuaweiTe_3b:b3:9a (a4:c6:4f:3b:b3:9a)
+ * 	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)
+ * 	Total Length: 148
+ * 	Identification: 0xe858 (59480)
+ * 	000. .... = Flags: 0x0
+ * 	...0 0000 0000 0000 = Fragment Offset: 0
+ * 	Time to Live: 255
+ * 	Protocol: IPIP (4)
+ * 	Header Checksum: 0x1148 [validation disabled]
+ * 	[Header checksum status: Unverified]
+ * 	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)
+ * 	Total Length: 128
+ * 	Identification: 0x0001 (1)
+ * 	000. .... = Flags: 0x0
+ * 	...0 0000 0000 0000 = Fragment Offset: 0
+ * 	Time to Live: 254
+ * 	Protocol: UDP (17)
+ * 	Header Checksum: 0xde84 [validation disabled]
+ * 	[Header checksum status: Unverified]
+ * 	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 [unverified]
+ * 	[Checksum Status: Unverified]
+ * 	[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)
+ */
+
+unsigned char data1[] = {
+	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};
+
+#if 1
+TEST(DATA_PACKET, ETH_VLAN_VLAN_IP4_IP4_UDP)
+{
+	char buffer[256];
+	struct packet handler;
+
+	const char *payload = packet_parse(&handler, (const char *)data1, sizeof(data1));
+	EXPECT_TRUE(payload != nullptr);
+	EXPECT_TRUE((char *)payload - (char *)&data1 == 70);
+	packet_print(&handler);
+
+	/******************************************************
+	 * packet_get_outermost/innermost_layer
+	 ******************************************************/
+
+	// LAYER_TYPE_ETHER
+	const struct layer_record *outer_eth_record = packet_get_outermost_layer(&handler, LAYER_TYPE_ETHER);
+	const struct layer_record *inner_eth_record = packet_get_innermost_layer(&handler, LAYER_TYPE_ETHER);
+
+	EXPECT_TRUE(outer_eth_record != nullptr);
+	EXPECT_TRUE(inner_eth_record != nullptr);
+	EXPECT_TRUE(outer_eth_record == inner_eth_record);
+	EXPECT_TRUE(outer_eth_record->hdr_offset == 0);
+	EXPECT_TRUE(outer_eth_record->hdr_len == 14);
+	EXPECT_TRUE(outer_eth_record->pld_len == 156);
+
+	// LAYER_TYPE_L2
+	const struct layer_record *outer_l2_record = packet_get_outermost_layer(&handler, LAYER_TYPE_L2);
+	const struct layer_record *inner_l2_record = packet_get_innermost_layer(&handler, LAYER_TYPE_L2);
+
+	EXPECT_TRUE(outer_l2_record != nullptr);
+	EXPECT_TRUE(inner_l2_record != nullptr);
+	EXPECT_TRUE(outer_l2_record == inner_l2_record);
+	EXPECT_TRUE(outer_l2_record == outer_eth_record);
+
+	// LAYER_TYPE_VLAN
+	const struct layer_record *outer_vlan_record = packet_get_outermost_layer(&handler, LAYER_TYPE_VLAN);
+	const struct layer_record *inner_vlan_record = packet_get_innermost_layer(&handler, LAYER_TYPE_VLAN);
+
+	EXPECT_TRUE(outer_vlan_record != nullptr);
+	EXPECT_TRUE(inner_vlan_record != nullptr);
+	EXPECT_TRUE(outer_vlan_record->hdr_offset == 14);
+	EXPECT_TRUE(outer_vlan_record->hdr_len == 4);
+	EXPECT_TRUE(outer_vlan_record->pld_len == 152);
+	EXPECT_TRUE(inner_vlan_record->hdr_offset == 18);
+	EXPECT_TRUE(inner_vlan_record->hdr_len == 4);
+	EXPECT_TRUE(inner_vlan_record->pld_len == 148);
+
+	// LAYER_TYPE_L2_TUN
+	const struct layer_record *outer_l2_tun_record = packet_get_outermost_layer(&handler, LAYER_TYPE_L2_TUN);
+	const struct layer_record *inner_l2_tun_record = packet_get_innermost_layer(&handler, LAYER_TYPE_L2_TUN);
+
+	EXPECT_TRUE(outer_l2_tun_record != nullptr);
+	EXPECT_TRUE(inner_l2_tun_record != nullptr);
+	EXPECT_TRUE(outer_l2_tun_record == outer_vlan_record);
+	EXPECT_TRUE(inner_l2_tun_record == inner_vlan_record);
+
+	// LAYER_TYPE_IPV4
+	const struct layer_record *outer_ipv4_record = packet_get_outermost_layer(&handler, LAYER_TYPE_IPV4);
+	const struct layer_record *inner_ipv4_record = packet_get_innermost_layer(&handler, LAYER_TYPE_IPV4);
+
+	EXPECT_TRUE(outer_ipv4_record != nullptr);
+	EXPECT_TRUE(inner_ipv4_record != nullptr);
+	EXPECT_TRUE(outer_ipv4_record->hdr_offset == 22);
+	EXPECT_TRUE(outer_ipv4_record->hdr_len == 20);
+	EXPECT_TRUE(outer_ipv4_record->pld_len == 128);
+	EXPECT_TRUE(inner_ipv4_record->hdr_offset == 42);
+	EXPECT_TRUE(inner_ipv4_record->hdr_len == 20);
+	EXPECT_TRUE(inner_ipv4_record->pld_len == 108);
+
+	// LAYER_TYPE_L3
+	const struct layer_record *outer_l3_record = packet_get_outermost_layer(&handler, LAYER_TYPE_L3);
+	const struct layer_record *inner_l3_record = packet_get_innermost_layer(&handler, LAYER_TYPE_L3);
+
+	EXPECT_TRUE(outer_l3_record != nullptr);
+	EXPECT_TRUE(inner_l3_record != nullptr);
+	EXPECT_TRUE(outer_l3_record == outer_ipv4_record);
+	EXPECT_TRUE(inner_l3_record == inner_ipv4_record);
+
+	// LAYER_TYPE_UDP
+	const struct layer_record *outer_udp_record = packet_get_outermost_layer(&handler, LAYER_TYPE_UDP);
+	const struct layer_record *inner_udp_record = packet_get_innermost_layer(&handler, LAYER_TYPE_UDP);
+
+	EXPECT_TRUE(outer_udp_record != nullptr);
+	EXPECT_TRUE(inner_udp_record != nullptr);
+	EXPECT_TRUE(outer_udp_record == inner_udp_record);
+	EXPECT_TRUE(outer_udp_record->hdr_offset == 62);
+	EXPECT_TRUE(outer_udp_record->hdr_len == 8);
+	EXPECT_TRUE(outer_udp_record->pld_len == 100);
+
+	// LAYER_TYPE_L4
+	const struct layer_record *outer_l4_record = packet_get_outermost_layer(&handler, LAYER_TYPE_L4);
+	const struct layer_record *inner_l4_record = packet_get_innermost_layer(&handler, LAYER_TYPE_L4);
+
+	EXPECT_TRUE(outer_l4_record != nullptr);
+	EXPECT_TRUE(inner_l4_record != nullptr);
+	EXPECT_TRUE(outer_l4_record == inner_l4_record);
+	EXPECT_TRUE(outer_l4_record == outer_udp_record);
+
+	/******************************************************
+	 * packet_get_outermost/innermost_tuple2
+	 ******************************************************/
+
+	struct tuple2 outer_tuple2;
+	struct tuple2 inner_tuple2;
+	EXPECT_TRUE(packet_get_outermost_tuple2(&handler, &outer_tuple2) == 0);
+	EXPECT_TRUE(packet_get_innermost_tuple2(&handler, &inner_tuple2) == 0);
+	memset(buffer, 0, sizeof(buffer));
+	tuple2_tostring(&outer_tuple2, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "69.67.35.146 -> 41.202.46.110");
+	memset(buffer, 0, sizeof(buffer));
+	tuple2_tostring(&inner_tuple2, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "10.10.100.25 -> 10.10.101.2");
+
+	/******************************************************
+	 * packet_get_outermost/innermost_tuple4
+	 ******************************************************/
+
+	struct tuple4 outer_tuple4;
+	struct tuple4 inner_tuple4;
+	EXPECT_TRUE(packet_get_outermost_tuple4(&handler, &outer_tuple4) == 0);
+	EXPECT_TRUE(packet_get_innermost_tuple4(&handler, &inner_tuple4) == 0);
+	memset(buffer, 0, sizeof(buffer));
+	tuple4_tostring(&outer_tuple4, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "10.10.100.25:62367 -> 10.10.101.2:17000");
+	memset(buffer, 0, sizeof(buffer));
+	tuple4_tostring(&inner_tuple4, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "10.10.100.25:62367 -> 10.10.101.2:17000");
+
+	/******************************************************
+	 * packet_get_outermost/innermost_tuple6
+	 ******************************************************/
+
+	struct tuple6 outer_tuple6;
+	struct tuple6 inner_tuple6;
+	EXPECT_TRUE(packet_get_outermost_tuple6(&handler, &outer_tuple6) == 0);
+	EXPECT_TRUE(packet_get_innermost_tuple6(&handler, &inner_tuple6) == 0);
+	memset(buffer, 0, sizeof(buffer));
+	tuple6_tostring(&outer_tuple6, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "10.10.100.25:62367 -> 10.10.101.2:17000, proto: 17, zone: 0");
+	memset(buffer, 0, sizeof(buffer));
+	tuple6_tostring(&inner_tuple6, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "10.10.100.25:62367 -> 10.10.101.2:17000, proto: 17, zone: 0");
+}
+#endif
+
+/******************************************************************************
+ * Pcap file: 2-ETH_IP6_IP4_TCP_SSH.pcap
+ * [Protocols in frame: eth:ethertype:ipv6:ip:tcp:ssh]
+ ******************************************************************************
+ *
+ * Frame 1: 726 bytes on wire (5808 bits), 726 bytes captured (5808 bits)
+ * 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)
+ * 	Source: EvocInte_36:51:3c (00:22:46:36:51:3c)
+ * 	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 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)
+ * 	Total Length: 672
+ * 	Identification: 0x0968 (2408)
+ * 	000. .... = Flags: 0x0
+ * 	...0 0000 0000 0000 = Fragment Offset: 0
+ * 	Time to Live: 212
+ * 	Protocol: TCP (6)
+ * 	Header Checksum: 0xd4ea [validation disabled]
+ * 	[Header checksum status: Unverified]
+ * 	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)
+ * 	Window: 28584
+ * 	[Calculated window size: 28584]
+ * 	[Window size scaling factor: -1 (unknown)]
+ * 	Checksum: 0xc51f [unverified]
+ * 	[Checksum Status: Unverified]
+ * 	Urgent Pointer: 0
+ * 	[Timestamps]
+ * 	[SEQ/ACK analysis]
+ * 	TCP payload (632 bytes)
+ * SSH Protocol
+ */
+
+unsigned char data2[] = {
+	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};
+
+#if 1
+TEST(DATA_PACKET, ETH_IP6_IP4_TCP_SSH)
+{
+	char buffer[256];
+	struct packet handler;
+
+	const char *payload = packet_parse(&handler, (const char *)data2, sizeof(data2));
+	EXPECT_TRUE(payload != nullptr);
+	EXPECT_TRUE((char *)payload - (char *)&data2 == 94);
+	packet_print(&handler);
+
+	/******************************************************
+	 * packet_get_outermost/innermost_layer
+	 ******************************************************/
+
+	// LAYER_TYPE_ETHER
+	const struct layer_record *outer_eth_record = packet_get_outermost_layer(&handler, LAYER_TYPE_ETHER);
+	const struct layer_record *inner_eth_record = packet_get_innermost_layer(&handler, LAYER_TYPE_ETHER);
+
+	EXPECT_TRUE(outer_eth_record != nullptr);
+	EXPECT_TRUE(inner_eth_record != nullptr);
+	EXPECT_TRUE(outer_eth_record == inner_eth_record);
+	EXPECT_TRUE(outer_eth_record->hdr_offset == 0);
+	EXPECT_TRUE(outer_eth_record->hdr_len == 14);
+	EXPECT_TRUE(outer_eth_record->pld_len == 712);
+
+	// LAYER_TYPE_L2
+	const struct layer_record *outer_l2_record = packet_get_outermost_layer(&handler, LAYER_TYPE_L2);
+	const struct layer_record *inner_l2_record = packet_get_innermost_layer(&handler, LAYER_TYPE_L2);
+
+	EXPECT_TRUE(outer_l2_record != nullptr);
+	EXPECT_TRUE(inner_l2_record != nullptr);
+	EXPECT_TRUE(outer_l2_record == inner_l2_record);
+	EXPECT_TRUE(outer_l2_record == outer_eth_record);
+
+	// LAYER_TYPE_IPV6
+	const struct layer_record *outer_ipv6_record = packet_get_outermost_layer(&handler, LAYER_TYPE_IPV6);
+	const struct layer_record *inner_ipv6_record = packet_get_innermost_layer(&handler, LAYER_TYPE_IPV6);
+
+	EXPECT_TRUE(outer_ipv6_record != nullptr);
+	EXPECT_TRUE(inner_ipv6_record != nullptr);
+	EXPECT_TRUE(outer_ipv6_record == inner_ipv6_record);
+	EXPECT_TRUE(outer_ipv6_record->hdr_offset == 14);
+	EXPECT_TRUE(outer_ipv6_record->hdr_len == 40);
+	EXPECT_TRUE(outer_ipv6_record->pld_len == 672);
+
+	// LAYER_TYPE_IPV4
+	const struct layer_record *outer_ipv4_record = packet_get_outermost_layer(&handler, LAYER_TYPE_IPV4);
+	const struct layer_record *inner_ipv4_record = packet_get_innermost_layer(&handler, LAYER_TYPE_IPV4);
+
+	EXPECT_TRUE(outer_ipv4_record != nullptr);
+	EXPECT_TRUE(inner_ipv4_record != nullptr);
+	EXPECT_TRUE(outer_ipv4_record == inner_ipv4_record);
+	EXPECT_TRUE(outer_ipv4_record->hdr_offset == 54);
+	EXPECT_TRUE(outer_ipv4_record->hdr_len == 20);
+	EXPECT_TRUE(outer_ipv4_record->pld_len == 652);
+
+	// LAYER_TYPE_L3
+	const struct layer_record *outer_l3_record = packet_get_outermost_layer(&handler, LAYER_TYPE_L3);
+	const struct layer_record *inner_l3_record = packet_get_innermost_layer(&handler, LAYER_TYPE_L3);
+
+	EXPECT_TRUE(outer_l3_record != nullptr);
+	EXPECT_TRUE(inner_l3_record != nullptr);
+	EXPECT_TRUE(outer_l3_record == outer_ipv6_record);
+	EXPECT_TRUE(inner_l3_record == outer_ipv4_record);
+
+	// LAYER_TYPE_TCP
+	const struct layer_record *outer_tcp_record = packet_get_outermost_layer(&handler, LAYER_TYPE_TCP);
+	const struct layer_record *inner_tcp_record = packet_get_innermost_layer(&handler, LAYER_TYPE_TCP);
+
+	EXPECT_TRUE(outer_tcp_record != nullptr);
+	EXPECT_TRUE(inner_tcp_record != nullptr);
+	EXPECT_TRUE(outer_tcp_record == inner_tcp_record);
+	EXPECT_TRUE(outer_tcp_record->hdr_offset == 74);
+	EXPECT_TRUE(outer_tcp_record->hdr_len == 20);
+	EXPECT_TRUE(outer_tcp_record->pld_len == 632);
+
+	// LAYER_TYPE_L4
+	const struct layer_record *outer_l4_record = packet_get_outermost_layer(&handler, LAYER_TYPE_L4);
+	const struct layer_record *inner_l4_record = packet_get_innermost_layer(&handler, LAYER_TYPE_L4);
+
+	EXPECT_TRUE(outer_l4_record != nullptr);
+	EXPECT_TRUE(inner_l4_record != nullptr);
+	EXPECT_TRUE(outer_l4_record == inner_l4_record);
+	EXPECT_TRUE(outer_l4_record == outer_tcp_record);
+
+	/******************************************************
+	 * packet_get_outermost/innermost_tuple2
+	 ******************************************************/
+
+	struct tuple2 outer_tuple2;
+	struct tuple2 inner_tuple2;
+	EXPECT_TRUE(packet_get_outermost_tuple2(&handler, &outer_tuple2) == 0);
+	EXPECT_TRUE(packet_get_innermost_tuple2(&handler, &inner_tuple2) == 0);
+	memset(buffer, 0, sizeof(buffer));
+	tuple2_tostring(&outer_tuple2, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "2001::192:168:40:134 -> 2001::192:168:40:133");
+	memset(buffer, 0, sizeof(buffer));
+	tuple2_tostring(&inner_tuple2, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "1.1.1.1 -> 2.2.2.2");
+
+	/******************************************************
+	 * packet_get_outermost/innermost_tuple4
+	 ******************************************************/
+
+	struct tuple4 outer_tuple4;
+	struct tuple4 inner_tuple4;
+	EXPECT_TRUE(packet_get_outermost_tuple4(&handler, &outer_tuple4) == 0);
+	EXPECT_TRUE(packet_get_innermost_tuple4(&handler, &inner_tuple4) == 0);
+	memset(buffer, 0, sizeof(buffer));
+	tuple4_tostring(&outer_tuple4, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "1.1.1.1:57639 -> 2.2.2.2:22");
+	tuple4_tostring(&inner_tuple4, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "1.1.1.1:57639 -> 2.2.2.2:22");
+
+	/******************************************************
+	 * packet_get_outermost/innermost_tuple6
+	 ******************************************************/
+
+	struct tuple6 outer_tuple6;
+	struct tuple6 inner_tuple6;
+	EXPECT_TRUE(packet_get_outermost_tuple6(&handler, &outer_tuple6) == 0);
+	EXPECT_TRUE(packet_get_innermost_tuple6(&handler, &inner_tuple6) == 0);
+	memset(buffer, 0, sizeof(buffer));
+	tuple6_tostring(&outer_tuple6, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "1.1.1.1:57639 -> 2.2.2.2:22, proto: 6, zone: 0");
+	memset(buffer, 0, sizeof(buffer));
+	tuple6_tostring(&inner_tuple6, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "1.1.1.1:57639 -> 2.2.2.2:22, proto: 6, zone: 0");
+}
+#endif
+
+/******************************************************************************
+ * Pcap file: 3-ETH_VLAN_IP6_IP4_GRE_PPP_IP4_UDP_DNS.pcap
+ * [Protocols in frame: eth:ethertype:vlan:ethertype:ipv6:ip:gre:ppp:ip:udp:dns]
+ ******************************************************************************
+ *
+ * Frame 1: 272 bytes on wire (2176 bits), 272 bytes captured (2176 bits)
+ * Ethernet II, Src: Cisco_e6:82:c4 (00:19:06:e6:82:c4), Dst: 10:01:00:00:61:3d (10:01:00:00:61:3d)
+ * 	Destination: 10:01:00:00:61:3d (10:01:00:00:61:3d)
+ * 	Source: Cisco_e6:82:c4 (00:19:06:e6:82:c4)
+ * 	Type: 802.1Q Virtual LAN (0x8100)
+ * 802.1Q Virtual LAN, PRI: 0, DEI: 0, ID: 100
+ * 	000. .... .... .... = Priority: Best Effort (default) (0)
+ * 	...0 .... .... .... = DEI: Ineligible
+ * 	.... 0000 0110 0100 = ID: 100
+ * 	Type: IPv6 (0x86dd)
+ * Internet Protocol Version 6, Src: 2607:fcd0:100:2300::b108:2a6b, Dst: 2402:f000:1:8e01::5555
+ * 	0110 .... = Version: 6
+ * 	.... 0000 0000 .... .... .... .... .... = Traffic Class: 0x00 (DSCP: CS0, ECN: Not-ECT)
+ * 	.... 0000 0000 0000 0000 0000 = Flow Label: 0x00000
+ * 	Payload Length: 214
+ * 	Next Header: IPIP (4)
+ * 	Hop Limit: 57
+ * 	Source Address: 2607:fcd0:100:2300::b108:2a6b
+ * 	Destination Address: 2402:f000:1:8e01::5555
+ * Internet Protocol Version 4, Src: 192.52.166.154, Dst: 16.0.0.200
+ * 	0100 .... = Version: 4
+ * 	.... 0101 = Header Length: 20 bytes (5)
+ * 	Differentiated Services Field: 0x00 (DSCP: CS0, ECN: Not-ECT)
+ * 	Total Length: 214
+ * 	Identification: 0x842f (33839)
+ * 	010. .... = Flags: 0x2, Don't fragment
+ * 	...0 0000 0000 0000 = Fragment Offset: 0
+ * 	Time to Live: 64
+ * 	Protocol: Generic Routing Encapsulation (47)
+ * 	Header Checksum: 0x3e33 [validation disabled]
+ * 	[Header checksum status: Unverified]
+ * 	Source Address: 192.52.166.154
+ * 	Destination Address: 16.0.0.200
+ * Generic Routing Encapsulation (PPP)
+ * 	Flags and Version: 0x3081
+ * 	Protocol Type: PPP (0x880b)
+ * 	Payload Length: 178
+ * 	Call ID: 17
+ * 	Sequence Number: 538640
+ * 	Acknowledgment Number: 429725
+ * Point-to-Point Protocol
+ * 	Address: 0xff
+ * 	Control: 0x03
+ * 	Protocol: Internet Protocol version 4 (0x0021)
+ * Internet Protocol Version 4, Src: 8.8.8.8, Dst: 172.16.44.3
+ * 	0100 .... = Version: 4
+ * 	.... 0101 = Header Length: 20 bytes (5)
+ * 	Differentiated Services Field: 0x00 (DSCP: CS0, ECN: Not-ECT)
+ * 	Total Length: 174
+ * 	Identification: 0x2f9c (12188)
+ * 	000. .... = Flags: 0x0
+ * 	...0 0000 0000 0000 = Fragment Offset: 0
+ * 	Time to Live: 50
+ * 	Protocol: UDP (17)
+ * 	Header Checksum: 0x7080 [validation disabled]
+ * 	[Header checksum status: Unverified]
+ * 	Source Address: 8.8.8.8
+ * 	Destination Address: 172.16.44.3
+ * User Datagram Protocol, Src Port: 53, Dst Port: 9879
+ * 	Source Port: 53
+ * 	Destination Port: 9879
+ * 	Length: 154
+ * 	Checksum: 0x45d9 [unverified]
+ * 	[Checksum Status: Unverified]
+ * 	[Stream index: 0]
+ * 	[Timestamps]
+ * 	UDP payload (146 bytes)
+ * Domain Name System (response)
+ */
+
+unsigned char data3[] = {
+	0x10, 0x01, 0x00, 0x00, 0x61, 0x3d, 0x00, 0x19, 0x06, 0xe6, 0x82, 0xc4, 0x81, 0x00, 0x00, 0x64, 0x86, 0xdd, 0x60, 0x00, 0x00, 0x00, 0x00, 0xd6, 0x04, 0x39,
+	0x26, 0x07, 0xfc, 0xd0, 0x01, 0x00, 0x23, 0x00, 0x00, 0x00, 0x00, 0x00, 0xb1, 0x08, 0x2a, 0x6b, 0x24, 0x02, 0xf0, 0x00, 0x00, 0x01, 0x8e, 0x01, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x55, 0x55, 0x45, 0x00, 0x00, 0xd6, 0x84, 0x2f, 0x40, 0x00, 0x40, 0x2f, 0x3e, 0x33, 0xc0, 0x34, 0xa6, 0x9a, 0x10, 0x00, 0x00, 0xc8,
+	0x30, 0x81, 0x88, 0x0b, 0x00, 0xb2, 0x00, 0x11, 0x00, 0x08, 0x38, 0x10, 0x00, 0x06, 0x8e, 0x9d, 0xff, 0x03, 0x00, 0x21, 0x45, 0x00, 0x00, 0xae, 0x2f, 0x9c,
+	0x00, 0x00, 0x32, 0x11, 0x70, 0x80, 0x08, 0x08, 0x08, 0x08, 0xac, 0x10, 0x2c, 0x03, 0x00, 0x35, 0x26, 0x97, 0x00, 0x9a, 0x45, 0xd9, 0xb4, 0xe2, 0x81, 0x83,
+	0x00, 0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x35, 0x78, 0x71, 0x74, 0x2d, 0x64, 0x65, 0x74, 0x65, 0x63, 0x74, 0x2d, 0x6d, 0x6f, 0x64, 0x65, 0x32, 0x2d,
+	0x37, 0x38, 0x63, 0x30, 0x36, 0x64, 0x63, 0x37, 0x2d, 0x30, 0x34, 0x61, 0x37, 0x2d, 0x34, 0x38, 0x35, 0x33, 0x2d, 0x38, 0x34, 0x38, 0x33, 0x2d, 0x61, 0x35,
+	0x36, 0x32, 0x38, 0x39, 0x37, 0x36, 0x65, 0x32, 0x33, 0x33, 0x00, 0x00, 0x01, 0x00, 0x01, 0x00, 0x00, 0x06, 0x00, 0x01, 0x00, 0x00, 0x02, 0xf0, 0x00, 0x40,
+	0x01, 0x61, 0x0c, 0x72, 0x6f, 0x6f, 0x74, 0x2d, 0x73, 0x65, 0x72, 0x76, 0x65, 0x72, 0x73, 0x03, 0x6e, 0x65, 0x74, 0x00, 0x05, 0x6e, 0x73, 0x74, 0x6c, 0x64,
+	0x0c, 0x76, 0x65, 0x72, 0x69, 0x73, 0x69, 0x67, 0x6e, 0x2d, 0x67, 0x72, 0x73, 0x03, 0x63, 0x6f, 0x6d, 0x00, 0x78, 0x0d, 0x09, 0x09, 0x00, 0x00, 0x07, 0x08,
+	0x00, 0x00, 0x03, 0x84, 0x00, 0x09, 0x3a, 0x80, 0x00, 0x01, 0x51, 0x80};
+
+#if 1
+TEST(DATA_PACKET, ETH_VLAN_IP6_IP4_GRE_PPP_IP4_UDP_DNS)
+{
+	char buffer[256];
+	struct packet handler;
+
+	const char *payload = packet_parse(&handler, (const char *)data3, sizeof(data3));
+	EXPECT_TRUE(payload != nullptr);
+	EXPECT_TRUE((char *)payload - (char *)&data3 == 126);
+	packet_print(&handler);
+
+	/******************************************************
+	 * packet_get_outermost/innermost_layer
+	 ******************************************************/
+
+	// LAYER_TYPE_ETHER
+	const struct layer_record *outer_eth_record = packet_get_outermost_layer(&handler, LAYER_TYPE_ETHER);
+	const struct layer_record *inner_eth_record = packet_get_innermost_layer(&handler, LAYER_TYPE_ETHER);
+
+	EXPECT_TRUE(outer_eth_record != nullptr);
+	EXPECT_TRUE(inner_eth_record != nullptr);
+	EXPECT_TRUE(outer_eth_record == inner_eth_record);
+	EXPECT_TRUE(outer_eth_record->hdr_offset == 0);
+	EXPECT_TRUE(outer_eth_record->hdr_len == 14);
+	EXPECT_TRUE(outer_eth_record->pld_len == 258);
+
+	// LAYER_TYPE_L2
+	const struct layer_record *outer_l2_record = packet_get_outermost_layer(&handler, LAYER_TYPE_L2);
+
+	EXPECT_TRUE(outer_l2_record != nullptr);
+	EXPECT_TRUE(outer_l2_record == outer_eth_record);
+
+	// LAYER_TYPE_VLAN
+	const struct layer_record *outer_vlan_record = packet_get_outermost_layer(&handler, LAYER_TYPE_VLAN);
+	const struct layer_record *inner_vlan_record = packet_get_innermost_layer(&handler, LAYER_TYPE_VLAN);
+
+	EXPECT_TRUE(outer_vlan_record != nullptr);
+	EXPECT_TRUE(inner_vlan_record != nullptr);
+	EXPECT_TRUE(outer_vlan_record == inner_vlan_record);
+	EXPECT_TRUE(outer_vlan_record->hdr_offset == 14);
+	EXPECT_TRUE(outer_vlan_record->hdr_len == 4);
+	EXPECT_TRUE(outer_vlan_record->pld_len == 254);
+
+	// LAYER_TYPE_L2_TUN
+	const struct layer_record *outer_l2_tun_record = packet_get_outermost_layer(&handler, LAYER_TYPE_L2_TUN);
+	const struct layer_record *inner_l2_tun_record = packet_get_innermost_layer(&handler, LAYER_TYPE_L2_TUN);
+
+	EXPECT_TRUE(outer_l2_tun_record != nullptr);
+	EXPECT_TRUE(inner_l2_tun_record != nullptr);
+	EXPECT_TRUE(outer_l2_tun_record == inner_l2_tun_record);
+	EXPECT_TRUE(outer_l2_tun_record == outer_vlan_record);
+
+	// LAYER_TYPE_IPV6
+	const struct layer_record *outer_ipv6_record = packet_get_outermost_layer(&handler, LAYER_TYPE_IPV6);
+	const struct layer_record *inner_ipv6_record = packet_get_innermost_layer(&handler, LAYER_TYPE_IPV6);
+
+	EXPECT_TRUE(outer_ipv6_record != nullptr);
+	EXPECT_TRUE(inner_ipv6_record != nullptr);
+	EXPECT_TRUE(outer_ipv6_record == inner_ipv6_record);
+	EXPECT_TRUE(outer_ipv6_record->hdr_offset == 18);
+	EXPECT_TRUE(outer_ipv6_record->hdr_len == 40);
+	EXPECT_TRUE(outer_ipv6_record->pld_len == 214);
+
+	// LAYER_TYPE_L3
+	const struct layer_record *outer_l3_record = packet_get_outermost_layer(&handler, LAYER_TYPE_L3);
+
+	EXPECT_TRUE(outer_l3_record != nullptr);
+	EXPECT_TRUE(outer_l3_record == outer_ipv6_record);
+
+	// LAYER_TYPE_IPV4
+	const struct layer_record *outer_ipv4_record = packet_get_outermost_layer(&handler, LAYER_TYPE_IPV4);
+
+	EXPECT_TRUE(outer_ipv4_record != nullptr);
+	EXPECT_TRUE(outer_ipv4_record->hdr_offset == 58);
+	EXPECT_TRUE(outer_ipv4_record->hdr_len == 20);
+	EXPECT_TRUE(outer_ipv4_record->pld_len == 194);
+
+	// LAYER_TYPE_GRE
+	const struct layer_record *outer_gre_record = packet_get_outermost_layer(&handler, LAYER_TYPE_GRE);
+	const struct layer_record *inner_ger_record = packet_get_innermost_layer(&handler, LAYER_TYPE_GRE);
+
+	EXPECT_TRUE(outer_gre_record != nullptr);
+	EXPECT_TRUE(inner_ger_record != nullptr);
+	EXPECT_TRUE(outer_gre_record == inner_ger_record);
+	EXPECT_TRUE(outer_gre_record->hdr_offset == 78);
+	EXPECT_TRUE(outer_gre_record->hdr_len == 16);
+	EXPECT_TRUE(outer_gre_record->pld_len == 178);
+
+	// LAYER_TYPE_L3_TUN
+	const struct layer_record *outer_l3_tun_record = packet_get_outermost_layer(&handler, LAYER_TYPE_L3_TUN);
+	const struct layer_record *inner_l3_tun_record = packet_get_innermost_layer(&handler, LAYER_TYPE_L3_TUN);
+
+	EXPECT_TRUE(outer_l3_tun_record != nullptr);
+	EXPECT_TRUE(inner_l3_tun_record != nullptr);
+	EXPECT_TRUE(outer_l3_tun_record == inner_l3_tun_record);
+	EXPECT_TRUE(outer_l3_tun_record == outer_gre_record);
+
+	// LAYER_TYPE_PPP
+	const struct layer_record *outer_ppp_record = packet_get_outermost_layer(&handler, LAYER_TYPE_PPP);
+	const struct layer_record *inner_ppp_record = packet_get_innermost_layer(&handler, LAYER_TYPE_PPP);
+
+	EXPECT_TRUE(outer_ppp_record != nullptr);
+	EXPECT_TRUE(inner_ppp_record != nullptr);
+	EXPECT_TRUE(outer_ppp_record == inner_ppp_record);
+	EXPECT_TRUE(outer_ppp_record->hdr_offset == 94);
+	EXPECT_TRUE(outer_ppp_record->hdr_len == 4);
+	EXPECT_TRUE(outer_ppp_record->pld_len == 174);
+
+	// LAYER_TYPE_L2
+	const struct layer_record *inner_l2_record = packet_get_innermost_layer(&handler, LAYER_TYPE_L2);
+
+	EXPECT_TRUE(inner_l2_record != nullptr);
+	EXPECT_TRUE(inner_l2_record == outer_ppp_record);
+
+	// LAYER_TYPE_IPV4
+	const struct layer_record *inner_ipv4_record = packet_get_innermost_layer(&handler, LAYER_TYPE_IPV4);
+
+	EXPECT_TRUE(inner_ipv4_record != nullptr);
+	EXPECT_TRUE(inner_ipv4_record->hdr_offset == 98);
+	EXPECT_TRUE(inner_ipv4_record->hdr_len == 20);
+	EXPECT_TRUE(inner_ipv4_record->pld_len == 154);
+
+	// LAYER_TYPE_L3
+	const struct layer_record *inner_l3_record = packet_get_innermost_layer(&handler, LAYER_TYPE_L3);
+
+	EXPECT_TRUE(inner_l3_record != nullptr);
+	EXPECT_TRUE(inner_l3_record == inner_ipv4_record);
+
+	// LAYER_TYPE_UDP
+	const struct layer_record *outer_udp_record = packet_get_outermost_layer(&handler, LAYER_TYPE_UDP);
+	const struct layer_record *inner_udp_record = packet_get_innermost_layer(&handler, LAYER_TYPE_UDP);
+
+	EXPECT_TRUE(outer_udp_record != nullptr);
+	EXPECT_TRUE(inner_udp_record != nullptr);
+	EXPECT_TRUE(outer_udp_record == inner_udp_record);
+	EXPECT_TRUE(outer_udp_record->hdr_offset == 118);
+	EXPECT_TRUE(outer_udp_record->hdr_len == 8);
+	EXPECT_TRUE(outer_udp_record->pld_len == 146);
+
+	// LAYER_TYPE_L4
+	const struct layer_record *outer_l4_record = packet_get_outermost_layer(&handler, LAYER_TYPE_L4);
+	const struct layer_record *inner_l4_record = packet_get_innermost_layer(&handler, LAYER_TYPE_L4);
+
+	EXPECT_TRUE(outer_l4_record != nullptr);
+	EXPECT_TRUE(inner_l4_record != nullptr);
+	EXPECT_TRUE(outer_l4_record == inner_l4_record);
+	EXPECT_TRUE(outer_l4_record == outer_udp_record);
+
+	/******************************************************
+	 * packet_get_outermost/innermost_tuple2
+	 ******************************************************/
+
+	struct tuple2 outer_tuple2;
+	struct tuple2 inner_tuple2;
+	EXPECT_TRUE(packet_get_outermost_tuple2(&handler, &outer_tuple2) == 0);
+	EXPECT_TRUE(packet_get_innermost_tuple2(&handler, &inner_tuple2) == 0);
+	memset(buffer, 0, sizeof(buffer));
+	tuple2_tostring(&outer_tuple2, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "2607:fcd0:100:2300::b108:2a6b -> 2402:f000:1:8e01::5555");
+	memset(buffer, 0, sizeof(buffer));
+	tuple2_tostring(&inner_tuple2, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "8.8.8.8 -> 172.16.44.3");
+
+	/******************************************************
+	 * packet_get_outermost/innermost_tuple4
+	 ******************************************************/
+
+	struct tuple4 outer_tuple4;
+	struct tuple4 inner_tuple4;
+	EXPECT_TRUE(packet_get_outermost_tuple4(&handler, &outer_tuple4) == 0);
+	EXPECT_TRUE(packet_get_innermost_tuple4(&handler, &inner_tuple4) == 0);
+	memset(buffer, 0, sizeof(buffer));
+	tuple4_tostring(&outer_tuple4, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "8.8.8.8:53 -> 172.16.44.3:9879");
+	memset(buffer, 0, sizeof(buffer));
+	tuple4_tostring(&inner_tuple4, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "8.8.8.8:53 -> 172.16.44.3:9879");
+
+	/******************************************************
+	 * packet_get_outermost/innermost_tuple6
+	 ******************************************************/
+
+	struct tuple6 outer_tuple6;
+	struct tuple6 inner_tuple6;
+	EXPECT_TRUE(packet_get_outermost_tuple6(&handler, &outer_tuple6) == 0);
+	EXPECT_TRUE(packet_get_innermost_tuple6(&handler, &inner_tuple6) == 0);
+	memset(buffer, 0, sizeof(buffer));
+	tuple6_tostring(&outer_tuple6, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "8.8.8.8:53 -> 172.16.44.3:9879, proto: 17, zone: 0");
+	memset(buffer, 0, sizeof(buffer));
+	tuple6_tostring(&inner_tuple6, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "8.8.8.8:53 -> 172.16.44.3:9879, proto: 17, zone: 0");
+}
+#endif
+
+/******************************************************************************
+ * Pcap file: 4-ETH_IP4_IP6_TCP.pcap
+ * [Protocols in frame: eth:ethertype:ip:ipv6:tcp]
+ ******************************************************************************
+ *
+ * Frame 1: 106 bytes on wire (848 bits), 106 bytes captured (848 bits)
+ * 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)
+ * 	Source: JuniperN_45:88:29 (2c:6b:f5:45:88:29)
+ * 	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)
+ * 	Total Length: 92
+ * 	Identification: 0x0b4d (2893)
+ * 	000. .... = Flags: 0x0
+ * 	...0 0000 0000 0000 = Fragment Offset: 0
+ * 	Time to Live: 59
+ * 	Protocol: IPv6 (41)
+ * 	Header Checksum: 0x09c8 [validation disabled]
+ * 	[Header checksum status: Unverified]
+ * 	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 0000 0000 0000 0000 = Flow Label: 0x00000
+ * 	Payload Length: 32
+ * 	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: 0, Len: 0
+ * 	Source Port: 52556
+ * 	Destination Port: 80
+ * 	[Stream index: 0]
+ * 	[Conversation completeness: Complete, WITH_DATA (31)]
+ * 	[TCP Segment Len: 0]
+ * 	Sequence Number: 0    (relative sequence number)
+ * 	Sequence Number (raw): 2172673142
+ * 	[Next Sequence Number: 1    (relative sequence number)]
+ * 	Acknowledgment Number: 0
+ * 	Acknowledgment number (raw): 0
+ * 	1000 .... = Header Length: 32 bytes (8)
+ * 	Flags: 0x002 (SYN)
+ * 	Window: 8192
+ * 	[Calculated window size: 8192]
+ * 	Checksum: 0xf757 [unverified]
+ * 	[Checksum Status: Unverified]
+ * 	Urgent Pointer: 0
+ * 	Options: (12 bytes), Maximum segment size, No-Operation (NOP), Window scale, No-Operation (NOP), No-Operation (NOP), SACK permitted
+ * 	[Timestamps]
+ */
+
+unsigned char data4[] = {
+	0x5c, 0x5e, 0xab, 0x2a, 0xa2, 0x00, 0x2c, 0x6b, 0xf5, 0x45, 0x88, 0x29, 0x08, 0x00, 0x45, 0x00, 0x00, 0x5c, 0x0b, 0x4d, 0x00, 0x00, 0x3b, 0x29, 0x09, 0xc8,
+	0xd2, 0x4d, 0x58, 0xa3, 0x3b, 0x42, 0x04, 0x32, 0x60, 0x00, 0x00, 0x00, 0x00, 0x20, 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, 0x76, 0x00, 0x00, 0x00, 0x00, 0x80, 0x02, 0x20, 0x00, 0xf7, 0x57, 0x00, 0x00, 0x02, 0x04, 0x04, 0xc4, 0x01, 0x03, 0x03, 0x08, 0x01, 0x01,
+	0x04, 0x02};
+
+#if 1
+TEST(DATA_PACKET, ETH_IP4_IP6_TCP)
+{
+	char buffer[256];
+	struct packet handler;
+
+	const char *payload = packet_parse(&handler, (const char *)data4, sizeof(data4));
+	EXPECT_TRUE(payload != nullptr);
+	EXPECT_TRUE((char *)payload - (char *)&data4 == 106);
+	packet_print(&handler);
+
+	/******************************************************
+	 * packet_get_outermost/innermost_layer
+	 ******************************************************/
+
+	// LAYER_TYPE_ETHER
+	const struct layer_record *outer_eth_record = packet_get_outermost_layer(&handler, LAYER_TYPE_ETHER);
+	const struct layer_record *inner_eth_record = packet_get_innermost_layer(&handler, LAYER_TYPE_ETHER);
+
+	EXPECT_TRUE(outer_eth_record != nullptr);
+	EXPECT_TRUE(inner_eth_record != nullptr);
+	EXPECT_TRUE(outer_eth_record == inner_eth_record);
+	EXPECT_TRUE(outer_eth_record->hdr_offset == 0);
+	EXPECT_TRUE(outer_eth_record->hdr_len == 14);
+	EXPECT_TRUE(outer_eth_record->pld_len == 92);
+
+	// LAYER_TYPE_L2
+	const struct layer_record *outer_l2_record = packet_get_outermost_layer(&handler, LAYER_TYPE_L2);
+	const struct layer_record *inner_l2_record = packet_get_innermost_layer(&handler, LAYER_TYPE_L2);
+
+	EXPECT_TRUE(outer_l2_record != nullptr);
+	EXPECT_TRUE(inner_l2_record != nullptr);
+	EXPECT_TRUE(outer_l2_record == inner_l2_record);
+	EXPECT_TRUE(outer_l2_record == outer_eth_record);
+
+	// LAYER_TYPE_IPV4
+	const struct layer_record *outer_ipv4_record = packet_get_outermost_layer(&handler, LAYER_TYPE_IPV4);
+	const struct layer_record *inner_ipv4_record = packet_get_innermost_layer(&handler, LAYER_TYPE_IPV4);
+
+	EXPECT_TRUE(outer_ipv4_record != nullptr);
+	EXPECT_TRUE(inner_ipv4_record != nullptr);
+	EXPECT_TRUE(outer_ipv4_record == inner_ipv4_record);
+	EXPECT_TRUE(outer_ipv4_record->hdr_offset == 14);
+	EXPECT_TRUE(outer_ipv4_record->hdr_len == 20);
+	EXPECT_TRUE(outer_ipv4_record->pld_len == 72);
+
+	// LAYER_TYPE_L3
+	const struct layer_record *outer_l3_record = packet_get_outermost_layer(&handler, LAYER_TYPE_L3);
+
+	EXPECT_TRUE(outer_l3_record != nullptr);
+	EXPECT_TRUE(outer_l3_record == outer_ipv4_record);
+
+	// LAYER_TYPE_IPV6
+	const struct layer_record *outer_ipv6_record = packet_get_outermost_layer(&handler, LAYER_TYPE_IPV6);
+	const struct layer_record *inner_ipv6_record = packet_get_innermost_layer(&handler, LAYER_TYPE_IPV6);
+
+	EXPECT_TRUE(outer_ipv6_record != nullptr);
+	EXPECT_TRUE(inner_ipv6_record != nullptr);
+	EXPECT_TRUE(outer_ipv6_record == inner_ipv6_record);
+	EXPECT_TRUE(outer_ipv6_record->hdr_offset == 34);
+	EXPECT_TRUE(outer_ipv6_record->hdr_len == 40);
+	EXPECT_TRUE(outer_ipv6_record->pld_len == 32);
+
+	// LAYER_TYPE_L3
+	const struct layer_record *inner_l3_record = packet_get_innermost_layer(&handler, LAYER_TYPE_L3);
+
+	EXPECT_TRUE(inner_l3_record != nullptr);
+	EXPECT_TRUE(inner_l3_record == outer_ipv6_record);
+
+	// LAYER_TYPE_TCP
+	const struct layer_record *outer_tcp_record = packet_get_outermost_layer(&handler, LAYER_TYPE_TCP);
+	const struct layer_record *inner_tcp_record = packet_get_innermost_layer(&handler, LAYER_TYPE_TCP);
+
+	EXPECT_TRUE(outer_tcp_record != nullptr);
+	EXPECT_TRUE(inner_tcp_record != nullptr);
+	EXPECT_TRUE(outer_tcp_record == inner_tcp_record);
+	EXPECT_TRUE(outer_tcp_record->hdr_offset == 74);
+	EXPECT_TRUE(outer_tcp_record->hdr_len == 32);
+	EXPECT_TRUE(outer_tcp_record->pld_len == 0);
+
+	// LAYER_TYPE_L4
+	const struct layer_record *outer_l4_record = packet_get_outermost_layer(&handler, LAYER_TYPE_L4);
+	const struct layer_record *inner_l4_record = packet_get_innermost_layer(&handler, LAYER_TYPE_L4);
+
+	EXPECT_TRUE(outer_l4_record != nullptr);
+	EXPECT_TRUE(inner_l4_record != nullptr);
+	EXPECT_TRUE(outer_l4_record == inner_l4_record);
+	EXPECT_TRUE(outer_l4_record == outer_tcp_record);
+
+	/******************************************************
+	 * packet_get_outermost/innermost_tuple2
+	 ******************************************************/
+
+	struct tuple2 outer_tuple2;
+	struct tuple2 inner_tuple2;
+	EXPECT_TRUE(packet_get_outermost_tuple2(&handler, &outer_tuple2) == 0);
+	EXPECT_TRUE(packet_get_innermost_tuple2(&handler, &inner_tuple2) == 0);
+	memset(buffer, 0, sizeof(buffer));
+	tuple2_tostring(&outer_tuple2, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "210.77.88.163 -> 59.66.4.50");
+	memset(buffer, 0, sizeof(buffer));
+	tuple2_tostring(&inner_tuple2, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "2001:da8:200:900e:200:5efe:d24d:58a3 -> 2600:140e:6::1702:1058");
+
+	/******************************************************
+	 * packet_get_outermost/innermost_tuple4
+	 ******************************************************/
+
+	struct tuple4 outer_tuple4;
+	struct tuple4 inner_tuple4;
+	EXPECT_TRUE(packet_get_outermost_tuple4(&handler, &outer_tuple4) == 0);
+	EXPECT_TRUE(packet_get_innermost_tuple4(&handler, &inner_tuple4) == 0);
+	memset(buffer, 0, sizeof(buffer));
+	tuple4_tostring(&outer_tuple4, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "2001:da8:200:900e:200:5efe:d24d:58a3:52556 -> 2600:140e:6::1702:1058:80");
+	memset(buffer, 0, sizeof(buffer));
+	tuple4_tostring(&inner_tuple4, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "2001:da8:200:900e:200:5efe:d24d:58a3:52556 -> 2600:140e:6::1702:1058:80");
+
+	/******************************************************
+	 * packet_get_outermost/innermost_tuple6
+	 ******************************************************/
+
+	struct tuple6 outer_tuple6;
+	struct tuple6 inner_tuple6;
+	EXPECT_TRUE(packet_get_outermost_tuple6(&handler, &outer_tuple6) == 0);
+	EXPECT_TRUE(packet_get_innermost_tuple6(&handler, &inner_tuple6) == 0);
+	memset(buffer, 0, sizeof(buffer));
+	tuple6_tostring(&outer_tuple6, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "2001:da8:200:900e:200:5efe:d24d:58a3:52556 -> 2600:140e:6::1702:1058:80, proto: 6, zone: 0");
+	memset(buffer, 0, sizeof(buffer));
+	tuple6_tostring(&inner_tuple6, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "2001:da8:200:900e:200:5efe:d24d:58a3:52556 -> 2600:140e:6::1702:1058:80, proto: 6, zone: 0");
+}
+#endif
+
+/******************************************************************************
+ * Pcap file: 5-ETH_IP6_IP6_UDP.pcap
+ * [Protocols in frame: eth:ethertype:ipv6:ipv6:udp:data]
+ ******************************************************************************
+ *
+ * Frame 1: 106 bytes on wire (848 bits), 106 bytes captured (848 bits)
+ * 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)
+ *     Source: 00:00:00_00:00:00 (00:00:00:00:00:00)
+ *     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 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 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 [unverified]
+ *     [Checksum Status: Unverified]
+ *     [Stream index: 0]
+ *     [Timestamps]
+ *     UDP payload (4 bytes)
+ * Data (4 bytes)
+ */
+
+unsigned char data5[] = {
+	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};
+
+#if 1
+TEST(DATA_PACKET, ETH_IP6_IP6_UDP)
+{
+	char buffer[256];
+	struct packet handler;
+
+	const char *payload = packet_parse(&handler, (const char *)data5, sizeof(data5));
+	EXPECT_TRUE(payload != nullptr);
+	EXPECT_TRUE((char *)payload - (char *)&data5 == 102);
+	packet_print(&handler);
+
+	/******************************************************
+	 * packet_get_outermost/innermost_layer
+	 ******************************************************/
+
+	// LAYER_TYPE_ETHER
+	const struct layer_record *outer_eth_record = packet_get_outermost_layer(&handler, LAYER_TYPE_ETHER);
+	const struct layer_record *inner_eth_record = packet_get_innermost_layer(&handler, LAYER_TYPE_ETHER);
+
+	EXPECT_TRUE(outer_eth_record != nullptr);
+	EXPECT_TRUE(inner_eth_record != nullptr);
+	EXPECT_TRUE(outer_eth_record == inner_eth_record);
+	EXPECT_TRUE(outer_eth_record->hdr_offset == 0);
+	EXPECT_TRUE(outer_eth_record->hdr_len == 14);
+	EXPECT_TRUE(outer_eth_record->pld_len == 92);
+
+	// LAYER_TYPE_L2
+	const struct layer_record *outer_l2_record = packet_get_outermost_layer(&handler, LAYER_TYPE_L2);
+	const struct layer_record *inner_l2_record = packet_get_innermost_layer(&handler, LAYER_TYPE_L2);
+
+	EXPECT_TRUE(outer_l2_record != nullptr);
+	EXPECT_TRUE(inner_l2_record != nullptr);
+	EXPECT_TRUE(outer_l2_record == inner_l2_record);
+	EXPECT_TRUE(outer_l2_record == outer_eth_record);
+
+	// LAYER_TYPE_IPV6
+	const struct layer_record *outer_ipv6_record = packet_get_outermost_layer(&handler, LAYER_TYPE_IPV6);
+
+	EXPECT_TRUE(outer_ipv6_record != nullptr);
+	EXPECT_TRUE(outer_ipv6_record->hdr_offset == 14);
+	EXPECT_TRUE(outer_ipv6_record->hdr_len == 40);
+	EXPECT_TRUE(outer_ipv6_record->pld_len == 52);
+
+	// LAYER_TYPE_L3
+	const struct layer_record *outer_l3_record = packet_get_outermost_layer(&handler, LAYER_TYPE_L3);
+
+	EXPECT_TRUE(outer_l3_record != nullptr);
+	EXPECT_TRUE(outer_l3_record == outer_ipv6_record);
+
+	// LAYER_TYPE_IPV6
+	const struct layer_record *inner_ipv6_record = packet_get_innermost_layer(&handler, LAYER_TYPE_IPV6);
+
+	EXPECT_TRUE(inner_ipv6_record != nullptr);
+	EXPECT_TRUE(inner_ipv6_record->hdr_offset == 54);
+	EXPECT_TRUE(inner_ipv6_record->hdr_len == 40);
+	EXPECT_TRUE(inner_ipv6_record->pld_len == 12);
+
+	// LAYER_TYPE_L3
+	const struct layer_record *inner_l3_record = packet_get_innermost_layer(&handler, LAYER_TYPE_L3);
+
+	EXPECT_TRUE(inner_l3_record != nullptr);
+	EXPECT_TRUE(inner_l3_record == inner_ipv6_record);
+
+	// LAYER_TYPE_UDP
+	const struct layer_record *outer_udp_record = packet_get_outermost_layer(&handler, LAYER_TYPE_UDP);
+	const struct layer_record *inner_udp_record = packet_get_innermost_layer(&handler, LAYER_TYPE_UDP);
+
+	EXPECT_TRUE(outer_udp_record != nullptr);
+	EXPECT_TRUE(inner_udp_record != nullptr);
+	EXPECT_TRUE(outer_udp_record == inner_udp_record);
+	EXPECT_TRUE(outer_udp_record->hdr_offset == 94);
+	EXPECT_TRUE(outer_udp_record->hdr_len == 8);
+	EXPECT_TRUE(outer_udp_record->pld_len == 4);
+
+	// LAYER_TYPE_L4
+	const struct layer_record *outer_l4_record = packet_get_outermost_layer(&handler, LAYER_TYPE_L4);
+	const struct layer_record *inner_l4_record = packet_get_innermost_layer(&handler, LAYER_TYPE_L4);
+
+	EXPECT_TRUE(outer_l4_record != nullptr);
+	EXPECT_TRUE(inner_l4_record != nullptr);
+	EXPECT_TRUE(outer_l4_record == inner_l4_record);
+	EXPECT_TRUE(outer_l4_record == outer_udp_record);
+
+	/******************************************************
+	 * packet_get_outermost/innermost_tuple2
+	 ******************************************************/
+
+	struct tuple2 outer_tuple2;
+	struct tuple2 inner_tuple2;
+	EXPECT_TRUE(packet_get_outermost_tuple2(&handler, &outer_tuple2) == 0);
+	EXPECT_TRUE(packet_get_innermost_tuple2(&handler, &inner_tuple2) == 0);
+	memset(buffer, 0, sizeof(buffer));
+	tuple2_tostring(&outer_tuple2, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "2001:4f8:4:7:2e0:81ff:fe52:ffff -> 2001:4f8:4:7:2e0:81ff:fe52:9a6b");
+	memset(buffer, 0, sizeof(buffer));
+	tuple2_tostring(&inner_tuple2, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "dead::beef -> cafe::babe");
+
+	/******************************************************
+	 * packet_get_outermost/innermost_tuple4
+	 ******************************************************/
+
+	struct tuple4 outer_tuple4;
+	struct tuple4 inner_tuple4;
+	EXPECT_TRUE(packet_get_outermost_tuple4(&handler, &outer_tuple4) == 0);
+	EXPECT_TRUE(packet_get_innermost_tuple4(&handler, &inner_tuple4) == 0);
+	memset(buffer, 0, sizeof(buffer));
+	tuple4_tostring(&outer_tuple4, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "dead::beef:30000 -> cafe::babe:13000");
+	memset(buffer, 0, sizeof(buffer));
+	tuple4_tostring(&inner_tuple4, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "dead::beef:30000 -> cafe::babe:13000");
+
+	/******************************************************
+	 * packet_get_outermost/innermost_tuple6
+	 ******************************************************/
+
+	struct tuple6 outer_tuple6;
+	struct tuple6 inner_tuple6;
+	EXPECT_TRUE(packet_get_outermost_tuple6(&handler, &outer_tuple6) == 0);
+	EXPECT_TRUE(packet_get_innermost_tuple6(&handler, &inner_tuple6) == 0);
+	memset(buffer, 0, sizeof(buffer));
+	tuple6_tostring(&outer_tuple6, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "dead::beef:30000 -> cafe::babe:13000, proto: 17, zone: 0");
+	memset(buffer, 0, sizeof(buffer));
+	tuple6_tostring(&inner_tuple6, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "dead::beef:30000 -> cafe::babe:13000, proto: 17, zone: 0");
+}
+#endif
+
+/******************************************************************************
+ * Pcap file: 6-ETH_MPLS_IP4_TCP.pcap
+ * [Protocols in frame: eth:ethertype:mpls:ip:tcp]
+ ******************************************************************************
+ *
+ * Frame 1: 70 bytes on wire (560 bits), 70 bytes captured (560 bits)
+ * Ethernet II, Src: Hangzhou_d9:28:cc (00:23:89:d9:28:cc), Dst: HuaweiTe_7f:eb:f7 (d4:6a:a8:7f:eb:f7)
+ * 	Destination: HuaweiTe_7f:eb:f7 (d4:6a:a8:7f:eb:f7)
+ * 	Source: Hangzhou_d9:28:cc (00:23:89:d9:28:cc)
+ * 	Type: MPLS label switched packet (0x8847)
+ * MultiProtocol Label Switching Header, Label: 18, Exp: 6, S: 1, TTL: 254
+ * 	0000 0000 0000 0001 0010 .... .... .... = MPLS Label: 18 (0x00012)
+ * 	.... .... .... .... .... 110. .... .... = MPLS Experimental Bits: 6
+ * 	.... .... .... .... .... ...1 .... .... = MPLS Bottom Of Label Stack: 1
+ * 	.... .... .... .... .... .... 1111 1110 = MPLS TTL: 254
+ * Internet Protocol Version 4, Src: 119.40.37.65, Dst: 123.125.29.250
+ * 	0100 .... = Version: 4
+ * 	.... 0101 = Header Length: 20 bytes (5)
+ * 	Differentiated Services Field: 0x00 (DSCP: CS0, ECN: Not-ECT)
+ * 	Total Length: 52
+ * 	Identification: 0x02a1 (673)
+ * 	010. .... = Flags: 0x2, Don't fragment
+ * 	...0 0000 0000 0000 = Fragment Offset: 0
+ * 	Time to Live: 126
+ * 	Protocol: TCP (6)
+ * 	Header Checksum: 0xc442 [validation disabled]
+ * 	[Header checksum status: Unverified]
+ * 	Source Address: 119.40.37.65
+ * 	Destination Address: 123.125.29.250
+ * Transmission Control Protocol, Src Port: 61853, Dst Port: 80, Seq: 0, Len: 0
+ * 	Source Port: 61853
+ * 	Destination Port: 80
+ * 	[Stream index: 0]
+ * 	[Conversation completeness: Complete, WITH_DATA (31)]
+ * 	[TCP Segment Len: 0]
+ * 	Sequence Number: 0    (relative sequence number)
+ * 	Sequence Number (raw): 1710561749
+ * 	[Next Sequence Number: 1    (relative sequence number)]
+ * 	Acknowledgment Number: 0
+ * 	Acknowledgment number (raw): 0
+ * 	1000 .... = Header Length: 32 bytes (8)
+ * 	Flags: 0x002 (SYN)
+ * 	Window: 8192
+ * 	[Calculated window size: 8192]
+ * 	Checksum: 0xa777 [unverified]
+ * 	[Checksum Status: Unverified]
+ * 	Urgent Pointer: 0
+ * 	Options: (12 bytes), Maximum segment size, No-Operation (NOP), Window scale, No-Operation (NOP), No-Operation (NOP), SACK permitted
+ * 	[Timestamps]
+ */
+
+unsigned char data6[] = {
+	0xd4, 0x6a, 0xa8, 0x7f, 0xeb, 0xf7, 0x00, 0x23, 0x89, 0xd9, 0x28, 0xcc, 0x88, 0x47, 0x00, 0x01, 0x2d, 0xfe, 0x45, 0x00, 0x00, 0x34, 0x02, 0xa1, 0x40, 0x00,
+	0x7e, 0x06, 0xc4, 0x42, 0x77, 0x28, 0x25, 0x41, 0x7b, 0x7d, 0x1d, 0xfa, 0xf1, 0x9d, 0x00, 0x50, 0x65, 0xf5, 0x19, 0xd5, 0x00, 0x00, 0x00, 0x00, 0x80, 0x02,
+	0x20, 0x00, 0xa7, 0x77, 0x00, 0x00, 0x02, 0x04, 0x05, 0xb4, 0x01, 0x03, 0x03, 0x08, 0x01, 0x01, 0x04, 0x02};
+
+#if 1
+TEST(DATA_PACKET, ETH_MPLS_IP4_TCP)
+{
+	char buffer[256];
+	struct packet handler;
+
+	const char *payload = packet_parse(&handler, (const char *)data6, sizeof(data6));
+	EXPECT_TRUE(payload != nullptr);
+	EXPECT_TRUE((char *)payload - (char *)&data6 == 70);
+	packet_print(&handler);
+
+	/******************************************************
+	 * packet_get_outermost/innermost_layer
+	 ******************************************************/
+
+	// LAYER_TYPE_ETHER
+	const struct layer_record *outer_eth_record = packet_get_outermost_layer(&handler, LAYER_TYPE_ETHER);
+	const struct layer_record *inner_eth_record = packet_get_innermost_layer(&handler, LAYER_TYPE_ETHER);
+
+	EXPECT_TRUE(outer_eth_record != nullptr);
+	EXPECT_TRUE(inner_eth_record != nullptr);
+	EXPECT_TRUE(outer_eth_record == inner_eth_record);
+	EXPECT_TRUE(outer_eth_record->hdr_offset == 0);
+	EXPECT_TRUE(outer_eth_record->hdr_len == 14);
+	EXPECT_TRUE(outer_eth_record->pld_len == 56);
+
+	// LAYER_TYPE_L2
+	const struct layer_record *outer_l2_record = packet_get_outermost_layer(&handler, LAYER_TYPE_L2);
+	const struct layer_record *inner_l2_record = packet_get_innermost_layer(&handler, LAYER_TYPE_L2);
+
+	EXPECT_TRUE(outer_l2_record != nullptr);
+	EXPECT_TRUE(inner_l2_record != nullptr);
+	EXPECT_TRUE(outer_l2_record == inner_l2_record);
+	EXPECT_TRUE(outer_l2_record == outer_eth_record);
+
+	// LAYER_TYPE_MPLS
+	const struct layer_record *outer_mpls_record = packet_get_outermost_layer(&handler, LAYER_TYPE_MPLS);
+	const struct layer_record *inner_mpls_record = packet_get_innermost_layer(&handler, LAYER_TYPE_MPLS);
+
+	EXPECT_TRUE(outer_mpls_record != nullptr);
+	EXPECT_TRUE(inner_mpls_record != nullptr);
+	EXPECT_TRUE(outer_mpls_record == inner_mpls_record);
+	EXPECT_TRUE(outer_mpls_record->hdr_offset == 14);
+	EXPECT_TRUE(outer_mpls_record->hdr_len == 4);
+	EXPECT_TRUE(outer_mpls_record->pld_len == 52);
+
+	// LAYER_TYPE_L2_TUN
+	const struct layer_record *outer_l2_tun_record = packet_get_outermost_layer(&handler, LAYER_TYPE_L2_TUN);
+	const struct layer_record *inner_l2_tun_record = packet_get_innermost_layer(&handler, LAYER_TYPE_L2_TUN);
+
+	EXPECT_TRUE(outer_l2_tun_record != nullptr);
+	EXPECT_TRUE(inner_l2_tun_record != nullptr);
+	EXPECT_TRUE(outer_l2_tun_record == inner_l2_tun_record);
+	EXPECT_TRUE(outer_l2_tun_record == outer_mpls_record);
+
+	// LAYER_TYPE_IPV4
+	const struct layer_record *outer_ipv4_record = packet_get_outermost_layer(&handler, LAYER_TYPE_IPV4);
+	const struct layer_record *inner_ipv4_record = packet_get_innermost_layer(&handler, LAYER_TYPE_IPV4);
+
+	EXPECT_TRUE(outer_ipv4_record != nullptr);
+	EXPECT_TRUE(inner_ipv4_record != nullptr);
+	EXPECT_TRUE(outer_ipv4_record == inner_ipv4_record);
+	EXPECT_TRUE(outer_ipv4_record->hdr_offset == 18);
+	EXPECT_TRUE(outer_ipv4_record->hdr_len == 20);
+	EXPECT_TRUE(outer_ipv4_record->pld_len == 32);
+
+	// LAYER_TYPE_L3
+	const struct layer_record *outer_l3_record = packet_get_outermost_layer(&handler, LAYER_TYPE_L3);
+	const struct layer_record *inner_l3_record = packet_get_innermost_layer(&handler, LAYER_TYPE_L3);
+
+	EXPECT_TRUE(outer_l3_record != nullptr);
+	EXPECT_TRUE(inner_l3_record != nullptr);
+	EXPECT_TRUE(outer_l3_record == inner_l3_record);
+	EXPECT_TRUE(outer_l3_record == outer_ipv4_record);
+
+	// LAYER_TYPE_TCP
+	const struct layer_record *outer_tcp_record = packet_get_outermost_layer(&handler, LAYER_TYPE_TCP);
+	const struct layer_record *inner_tcp_record = packet_get_innermost_layer(&handler, LAYER_TYPE_TCP);
+
+	EXPECT_TRUE(outer_tcp_record != nullptr);
+	EXPECT_TRUE(inner_tcp_record != nullptr);
+	EXPECT_TRUE(outer_tcp_record == inner_tcp_record);
+	EXPECT_TRUE(outer_tcp_record->hdr_offset == 38);
+	EXPECT_TRUE(outer_tcp_record->hdr_len == 32);
+	EXPECT_TRUE(outer_tcp_record->pld_len == 0);
+
+	// LAYER_TYPE_L4
+	const struct layer_record *outer_l4_record = packet_get_outermost_layer(&handler, LAYER_TYPE_L4);
+	const struct layer_record *inner_l4_record = packet_get_innermost_layer(&handler, LAYER_TYPE_L4);
+
+	EXPECT_TRUE(outer_l4_record != nullptr);
+	EXPECT_TRUE(inner_l4_record != nullptr);
+	EXPECT_TRUE(outer_l4_record == inner_l4_record);
+	EXPECT_TRUE(outer_l4_record == outer_tcp_record);
+
+	/******************************************************
+	 * packet_get_outermost/innermost_tuple2
+	 ******************************************************/
+
+	struct tuple2 outer_tuple2;
+	struct tuple2 inner_tuple2;
+	EXPECT_TRUE(packet_get_outermost_tuple2(&handler, &outer_tuple2) == 0);
+	EXPECT_TRUE(packet_get_innermost_tuple2(&handler, &inner_tuple2) == 0);
+	memset(buffer, 0, sizeof(buffer));
+	tuple2_tostring(&outer_tuple2, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "119.40.37.65 -> 123.125.29.250");
+	memset(buffer, 0, sizeof(buffer));
+	tuple2_tostring(&inner_tuple2, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "119.40.37.65 -> 123.125.29.250");
+
+	/******************************************************
+	 * packet_get_outermost/innermost_tuple4
+	 ******************************************************/
+
+	struct tuple4 outer_tuple4;
+	struct tuple4 inner_tuple4;
+	EXPECT_TRUE(packet_get_outermost_tuple4(&handler, &outer_tuple4) == 0);
+	EXPECT_TRUE(packet_get_innermost_tuple4(&handler, &inner_tuple4) == 0);
+	memset(buffer, 0, sizeof(buffer));
+	tuple4_tostring(&outer_tuple4, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "119.40.37.65:61853 -> 123.125.29.250:80");
+	memset(buffer, 0, sizeof(buffer));
+	tuple4_tostring(&inner_tuple4, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "119.40.37.65:61853 -> 123.125.29.250:80");
+
+	/******************************************************
+	 * packet_get_outermost/innermost_tuple6
+	 ******************************************************/
+
+	struct tuple6 outer_tuple6;
+	struct tuple6 inner_tuple6;
+	EXPECT_TRUE(packet_get_outermost_tuple6(&handler, &outer_tuple6) == 0);
+	EXPECT_TRUE(packet_get_innermost_tuple6(&handler, &inner_tuple6) == 0);
+	memset(buffer, 0, sizeof(buffer));
+	tuple6_tostring(&outer_tuple6, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "119.40.37.65:61853 -> 123.125.29.250:80, proto: 6, zone: 0");
+	memset(buffer, 0, sizeof(buffer));
+	tuple6_tostring(&inner_tuple6, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "119.40.37.65:61853 -> 123.125.29.250:80, proto: 6, zone: 0");
+}
+#endif
+
+/******************************************************************************
+ * Pcap file: 7-ETH_MPLS_MPLS_IP4_TCP.pcap
+ * [Protocols in frame: eth:ethertype:mpls:ip:tcp]
+ ******************************************************************************
+ *
+ * Frame 1: 66 bytes on wire (528 bits), 66 bytes captured (528 bits)
+ * Ethernet II, Src: Cisco_05:28:38 (00:30:96:05:28:38), Dst: Cisco_e6:fc:39 (00:30:96:e6:fc:39)
+ * 	Destination: Cisco_e6:fc:39 (00:30:96:e6:fc:39)
+ * 	Source: Cisco_05:28:38 (00:30:96:05:28:38)
+ * 	Type: MPLS label switched packet (0x8847)
+ * MultiProtocol Label Switching Header, Label: 18, Exp: 5, S: 0, TTL: 255
+ * 	0000 0000 0000 0001 0010 .... .... .... = MPLS Label: 18 (0x00012)
+ * 	.... .... .... .... .... 101. .... .... = MPLS Experimental Bits: 5
+ * 	.... .... .... .... .... ...0 .... .... = MPLS Bottom Of Label Stack: 0
+ * 	.... .... .... .... .... .... 1111 1111 = MPLS TTL: 255
+ * MultiProtocol Label Switching Header, Label: 16, Exp: 5, S: 1, TTL: 255
+ * 	0000 0000 0000 0001 0000 .... .... .... = MPLS Label: 16 (0x00010)
+ * 	.... .... .... .... .... 101. .... .... = MPLS Experimental Bits: 5
+ * 	.... .... .... .... .... ...1 .... .... = MPLS Bottom Of Label Stack: 1
+ * 	.... .... .... .... .... .... 1111 1111 = MPLS TTL: 255
+ * Internet Protocol Version 4, Src: 10.31.0.1, Dst: 10.34.0.1
+ * 	0100 .... = Version: 4
+ * 	.... 0101 = Header Length: 20 bytes (5)
+ * 	Differentiated Services Field: 0xb0 (DSCP: Unknown, ECN: Not-ECT)
+ * 	Total Length: 44
+ * 	Identification: 0x0000 (0)
+ * 	000. .... = Flags: 0x0
+ * 	...0 0000 0000 0000 = Fragment Offset: 0
+ * 	Time to Live: 255
+ * 	Protocol: TCP (6)
+ * 	Header Checksum: 0xa6d9 [validation disabled]
+ * 	[Header checksum status: Unverified]
+ * 	Source Address: 10.31.0.1
+ * 	Destination Address: 10.34.0.1
+ * Transmission Control Protocol, Src Port: 11001, Dst Port: 23, Seq: 0, Len: 0
+ * 	Source Port: 11001
+ * 	Destination Port: 23
+ * 	[Stream index: 0]
+ * 	[Conversation completeness: Incomplete (29)]
+ * 	[TCP Segment Len: 0]
+ * 	Sequence Number: 0    (relative sequence number)
+ * 	Sequence Number (raw): 3481568569
+ * 	[Next Sequence Number: 1    (relative sequence number)]
+ * 	Acknowledgment Number: 0
+ * 	Acknowledgment number (raw): 0
+ * 	0110 .... = Header Length: 24 bytes (6)
+ * 	Flags: 0x002 (SYN)
+ * 	Window: 4128
+ * 	[Calculated window size: 4128]
+ * 	Checksum: 0xf791 [unverified]
+ * 	[Checksum Status: Unverified]
+ * 	Urgent Pointer: 0
+ * 	Options: (4 bytes), Maximum segment size
+ * 	[Timestamps]
+ */
+
+unsigned char data7[] = {
+	0x00, 0x30, 0x96, 0xe6, 0xfc, 0x39, 0x00, 0x30, 0x96, 0x05, 0x28, 0x38, 0x88, 0x47, 0x00, 0x01, 0x2a, 0xff, 0x00, 0x01, 0x0b, 0xff, 0x45, 0xb0, 0x00, 0x2c,
+	0x00, 0x00, 0x00, 0x00, 0xff, 0x06, 0xa6, 0xd9, 0x0a, 0x1f, 0x00, 0x01, 0x0a, 0x22, 0x00, 0x01, 0x2a, 0xf9, 0x00, 0x17, 0xcf, 0x84, 0x85, 0x39, 0x00, 0x00,
+	0x00, 0x00, 0x60, 0x02, 0x10, 0x20, 0xf7, 0x91, 0x00, 0x00, 0x02, 0x04, 0x02, 0x18};
+
+#if 1
+TEST(DATA_PACKET, ETH_MPLS_MPLS_IP4_TCP)
+{
+	char buffer[256];
+	struct packet handler;
+
+	const char *payload = packet_parse(&handler, (const char *)data7, sizeof(data7));
+	EXPECT_TRUE(payload != nullptr);
+	EXPECT_TRUE((char *)payload - (char *)&data7 == 66);
+	packet_print(&handler);
+
+	/******************************************************
+	 * packet_get_outermost/innermost_layer
+	 ******************************************************/
+
+	// LAYER_TYPE_ETHER
+	const struct layer_record *outer_eth_record = packet_get_outermost_layer(&handler, LAYER_TYPE_ETHER);
+	const struct layer_record *inner_eth_record = packet_get_innermost_layer(&handler, LAYER_TYPE_ETHER);
+
+	EXPECT_TRUE(outer_eth_record != nullptr);
+	EXPECT_TRUE(inner_eth_record != nullptr);
+	EXPECT_TRUE(outer_eth_record == inner_eth_record);
+	EXPECT_TRUE(outer_eth_record->hdr_offset == 0);
+	EXPECT_TRUE(outer_eth_record->hdr_len == 14);
+	EXPECT_TRUE(outer_eth_record->pld_len == 52);
+
+	// LAYER_TYPE_L2
+	const struct layer_record *outer_l2_record = packet_get_outermost_layer(&handler, LAYER_TYPE_L2);
+	const struct layer_record *inner_l2_record = packet_get_innermost_layer(&handler, LAYER_TYPE_L2);
+
+	EXPECT_TRUE(outer_l2_record != nullptr);
+	EXPECT_TRUE(inner_l2_record != nullptr);
+	EXPECT_TRUE(outer_l2_record == inner_l2_record);
+	EXPECT_TRUE(outer_l2_record == outer_eth_record);
+
+	// LAYER_TYPE_MPLS
+	const struct layer_record *outer_mpls_record = packet_get_outermost_layer(&handler, LAYER_TYPE_MPLS);
+
+	EXPECT_TRUE(outer_mpls_record != nullptr);
+	EXPECT_TRUE(outer_mpls_record->hdr_offset == 14);
+	EXPECT_TRUE(outer_mpls_record->hdr_len == 4);
+	EXPECT_TRUE(outer_mpls_record->pld_len == 48);
+
+	// LAYER_TYPE_L2_TUN
+	const struct layer_record *outer_l2_tun_record = packet_get_outermost_layer(&handler, LAYER_TYPE_L2_TUN);
+
+	EXPECT_TRUE(outer_l2_tun_record != nullptr);
+	EXPECT_TRUE(outer_l2_tun_record == outer_mpls_record);
+
+	// LAYER_TYPE_MPLS
+	const struct layer_record *inner_mpls_record = packet_get_innermost_layer(&handler, LAYER_TYPE_MPLS);
+
+	EXPECT_TRUE(inner_mpls_record != nullptr);
+	EXPECT_TRUE(inner_mpls_record->hdr_offset == 18);
+	EXPECT_TRUE(inner_mpls_record->hdr_len == 4);
+	EXPECT_TRUE(inner_mpls_record->pld_len == 44);
+
+	// LAYER_TYPE_L2_TUN
+	const struct layer_record *inner_l2_tun_record = packet_get_innermost_layer(&handler, LAYER_TYPE_L2_TUN);
+
+	EXPECT_TRUE(inner_l2_tun_record != nullptr);
+	EXPECT_TRUE(inner_l2_tun_record == inner_mpls_record);
+
+	// LAYER_TYPE_IPV4
+	const struct layer_record *outer_ipv4_record = packet_get_outermost_layer(&handler, LAYER_TYPE_IPV4);
+	const struct layer_record *inner_ipv4_record = packet_get_innermost_layer(&handler, LAYER_TYPE_IPV4);
+
+	EXPECT_TRUE(outer_ipv4_record != nullptr);
+	EXPECT_TRUE(inner_ipv4_record != nullptr);
+	EXPECT_TRUE(outer_ipv4_record == inner_ipv4_record);
+	EXPECT_TRUE(outer_ipv4_record->hdr_offset == 22);
+	EXPECT_TRUE(outer_ipv4_record->hdr_len == 20);
+	EXPECT_TRUE(outer_ipv4_record->pld_len == 24);
+
+	// LAYER_TYPE_L3
+	const struct layer_record *outer_l3_record = packet_get_outermost_layer(&handler, LAYER_TYPE_L3);
+	const struct layer_record *inner_l3_record = packet_get_innermost_layer(&handler, LAYER_TYPE_L3);
+
+	EXPECT_TRUE(outer_l3_record != nullptr);
+	EXPECT_TRUE(inner_l3_record != nullptr);
+	EXPECT_TRUE(outer_l3_record == inner_l3_record);
+	EXPECT_TRUE(outer_l3_record == outer_ipv4_record);
+
+	// LAYER_TYPE_TCP
+	const struct layer_record *outer_tcp_record = packet_get_outermost_layer(&handler, LAYER_TYPE_TCP);
+	const struct layer_record *inner_tcp_record = packet_get_innermost_layer(&handler, LAYER_TYPE_TCP);
+
+	EXPECT_TRUE(outer_tcp_record != nullptr);
+	EXPECT_TRUE(inner_tcp_record != nullptr);
+	EXPECT_TRUE(outer_tcp_record == inner_tcp_record);
+	EXPECT_TRUE(outer_tcp_record->hdr_offset == 42);
+	EXPECT_TRUE(outer_tcp_record->hdr_len == 24);
+	EXPECT_TRUE(outer_tcp_record->pld_len == 0);
+
+	// LAYER_TYPE_L4
+	const struct layer_record *outer_l4_record = packet_get_outermost_layer(&handler, LAYER_TYPE_L4);
+	const struct layer_record *inner_l4_record = packet_get_innermost_layer(&handler, LAYER_TYPE_L4);
+
+	EXPECT_TRUE(outer_l4_record != nullptr);
+	EXPECT_TRUE(inner_l4_record != nullptr);
+	EXPECT_TRUE(outer_l4_record == inner_l4_record);
+	EXPECT_TRUE(outer_l4_record == outer_tcp_record);
+
+	/******************************************************
+	 * packet_get_outermost/innermost_tuple2
+	 ******************************************************/
+
+	struct tuple2 outer_tuple2;
+	struct tuple2 inner_tuple2;
+	EXPECT_TRUE(packet_get_outermost_tuple2(&handler, &outer_tuple2) == 0);
+	EXPECT_TRUE(packet_get_innermost_tuple2(&handler, &inner_tuple2) == 0);
+	memset(buffer, 0, sizeof(buffer));
+	tuple2_tostring(&outer_tuple2, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "10.31.0.1 -> 10.34.0.1");
+	memset(buffer, 0, sizeof(buffer));
+	tuple2_tostring(&inner_tuple2, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "10.31.0.1 -> 10.34.0.1");
+
+	/******************************************************
+	 * packet_get_outermost/innermost_tuple4
+	 ******************************************************/
+
+	struct tuple4 outer_tuple4;
+	struct tuple4 inner_tuple4;
+	EXPECT_TRUE(packet_get_outermost_tuple4(&handler, &outer_tuple4) == 0);
+	EXPECT_TRUE(packet_get_innermost_tuple4(&handler, &inner_tuple4) == 0);
+	memset(buffer, 0, sizeof(buffer));
+	tuple4_tostring(&outer_tuple4, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "10.31.0.1:11001 -> 10.34.0.1:23");
+	memset(buffer, 0, sizeof(buffer));
+	tuple4_tostring(&inner_tuple4, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "10.31.0.1:11001 -> 10.34.0.1:23");
+
+	/******************************************************
+	 * packet_get_outermost/innermost_tuple6
+	 ******************************************************/
+
+	struct tuple6 outer_tuple6;
+	struct tuple6 inner_tuple6;
+	EXPECT_TRUE(packet_get_outermost_tuple6(&handler, &outer_tuple6) == 0);
+	EXPECT_TRUE(packet_get_innermost_tuple6(&handler, &inner_tuple6) == 0);
+	memset(buffer, 0, sizeof(buffer));
+	tuple6_tostring(&outer_tuple6, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "10.31.0.1:11001 -> 10.34.0.1:23, proto: 6, zone: 0");
+	memset(buffer, 0, sizeof(buffer));
+	tuple6_tostring(&inner_tuple6, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "10.31.0.1:11001 -> 10.34.0.1:23, proto: 6, zone: 0");
+}
+#endif
+
+/******************************************************************************
+ * Pcap file: 8-ETH_VLAN_PPPOE_IP4_TCP.pcap
+ * [Protocols in frame: eth:ethertype:vlan:ethertype:pppoes:ppp:ip:tcp]
+ ******************************************************************************
+ *
+ * Frame 55: 78 bytes on wire (624 bits), 78 bytes captured (624 bits)
+ * Ethernet II, Src: 00:00:00_00:04:46 (00:00:00:00:04:46), Dst: 18:10:04:00:02:27 (18:10:04:00:02:27)
+ * 	Destination: 18:10:04:00:02:27 (18:10:04:00:02:27)
+ * 	Source: 00:00:00_00:04:46 (00:00:00:00:04:46)
+ * 	Type: 802.1Q Virtual LAN (0x8100)
+ * 802.1Q Virtual LAN, PRI: 3, DEI: 0, ID: 1476
+ * 	011. .... .... .... = Priority: Critical Applications (3)
+ * 	...0 .... .... .... = DEI: Ineligible
+ * 	.... 0101 1100 0100 = ID: 1476
+ * 	Type: PPPoE Session (0x8864)
+ * PPP-over-Ethernet Session
+ * 	0001 .... = Version: 1
+ * 	.... 0001 = Type: 1
+ * 	Code: Session Data (0x00)
+ * 	Session ID: 0xb4bc
+ * 	Payload Length: 54
+ * Point-to-Point Protocol
+ * 	Protocol: Internet Protocol version 4 (0x0021)
+ * Internet Protocol Version 4, Src: 100.65.55.0, Dst: 91.185.14.33
+ * 	0100 .... = Version: 4
+ * 	.... 0101 = Header Length: 20 bytes (5)
+ * 	Differentiated Services Field: 0x00 (DSCP: CS0, ECN: Not-ECT)
+ * 	Total Length: 52
+ * 	Identification: 0x4ba7 (19367)
+ * 	010. .... = Flags: 0x2, Don't fragment
+ * 	...0 0000 0000 0000 = Fragment Offset: 0
+ * 	Time to Live: 63
+ * 	Protocol: TCP (6)
+ * 	Header Checksum: 0xeb01 [validation disabled]
+ * 	[Header checksum status: Unverified]
+ * 	Source Address: 100.65.55.0
+ * 	Destination Address: 91.185.14.33
+ * Transmission Control Protocol, Src Port: 34532, Dst Port: 443, Seq: 491, Ack: 54523, Len: 0
+ * 	Source Port: 34532
+ * 	Destination Port: 443
+ * 	[Stream index: 0]
+ * 	[Conversation completeness: Incomplete (12)]
+ * 	[TCP Segment Len: 0]
+ * 	Sequence Number: 491    (relative sequence number)
+ * 	Sequence Number (raw): 3064322674
+ * 	[Next Sequence Number: 491    (relative sequence number)]
+ * 	Acknowledgment Number: 54523    (relative ack number)
+ * 	Acknowledgment number (raw): 2083649568
+ * 	1000 .... = Header Length: 32 bytes (8)
+ * 	Flags: 0x010 (ACK)
+ * 	Window: 4032
+ * 	[Calculated window size: 4032]
+ * 	[Window size scaling factor: -1 (unknown)]
+ * 	Checksum: 0xc361 [unverified]
+ * 	[Checksum Status: Unverified]
+ * 	Urgent Pointer: 0
+ * 	Options: (12 bytes), No-Operation (NOP), No-Operation (NOP), Timestamps
+ * 	[Timestamps]
+ * 	[SEQ/ACK analysis]
+ */
+
+unsigned char data8[] = {
+	0x18, 0x10, 0x04, 0x00, 0x02, 0x27, 0x00, 0x00, 0x00, 0x00, 0x04, 0x46, 0x81, 0x00, 0x65, 0xc4, 0x88, 0x64, 0x11, 0x00, 0xb4, 0xbc, 0x00, 0x36, 0x00, 0x21,
+	0x45, 0x00, 0x00, 0x34, 0x4b, 0xa7, 0x40, 0x00, 0x3f, 0x06, 0xeb, 0x01, 0x64, 0x41, 0x37, 0x00, 0x5b, 0xb9, 0x0e, 0x21, 0x86, 0xe4, 0x01, 0xbb, 0xb6, 0xa5,
+	0xda, 0x72, 0x7c, 0x31, 0xf8, 0x20, 0x80, 0x10, 0x0f, 0xc0, 0xc3, 0x61, 0x00, 0x00, 0x01, 0x01, 0x08, 0x0a, 0x00, 0x6f, 0xab, 0xdf, 0x9c, 0x61, 0xc7, 0xc5};
+
+#if 1
+TEST(DATA_PACKET, ETH_VLAN_PPPOE_IP4_TCP)
+{
+	char buffer[256];
+	struct packet handler;
+
+	const char *payload = packet_parse(&handler, (const char *)data8, sizeof(data8));
+	EXPECT_TRUE(payload != nullptr);
+	EXPECT_TRUE((char *)payload - (char *)&data8 == 78);
+	packet_print(&handler);
+
+	/******************************************************
+	 * packet_get_outermost/innermost_layer
+	 ******************************************************/
+
+	// LAYER_TYPE_ETHER
+	const struct layer_record *outer_eth_record = packet_get_outermost_layer(&handler, LAYER_TYPE_ETHER);
+	const struct layer_record *inner_eth_record = packet_get_innermost_layer(&handler, LAYER_TYPE_ETHER);
+
+	EXPECT_TRUE(outer_eth_record != nullptr);
+	EXPECT_TRUE(inner_eth_record != nullptr);
+	EXPECT_TRUE(outer_eth_record == inner_eth_record);
+	EXPECT_TRUE(outer_eth_record->hdr_offset == 0);
+	EXPECT_TRUE(outer_eth_record->hdr_len == 14);
+	EXPECT_TRUE(outer_eth_record->pld_len == 64);
+
+	// LAYER_TYPE_L2
+	const struct layer_record *outer_l2_record = packet_get_outermost_layer(&handler, LAYER_TYPE_L2);
+	const struct layer_record *inner_l2_record = packet_get_innermost_layer(&handler, LAYER_TYPE_L2);
+
+	EXPECT_TRUE(outer_l2_record != nullptr);
+	EXPECT_TRUE(inner_l2_record != nullptr);
+	EXPECT_TRUE(outer_l2_record == inner_l2_record);
+	EXPECT_TRUE(outer_l2_record == outer_eth_record);
+
+	// LAYER_TYPE_VLAN
+	const struct layer_record *outer_vlan_record = packet_get_outermost_layer(&handler, LAYER_TYPE_VLAN);
+	const struct layer_record *inner_vlan_record = packet_get_innermost_layer(&handler, LAYER_TYPE_VLAN);
+
+	EXPECT_TRUE(outer_vlan_record != nullptr);
+	EXPECT_TRUE(inner_vlan_record != nullptr);
+	EXPECT_TRUE(outer_vlan_record == inner_vlan_record);
+	EXPECT_TRUE(outer_vlan_record->hdr_offset == 14);
+	EXPECT_TRUE(outer_vlan_record->hdr_len == 4);
+	EXPECT_TRUE(outer_vlan_record->pld_len == 60);
+
+	// LAYER_TYPE_L2_TUN
+	const struct layer_record *outer_l2_tun_record = packet_get_outermost_layer(&handler, LAYER_TYPE_L2_TUN);
+
+	EXPECT_TRUE(outer_l2_tun_record != nullptr);
+	EXPECT_TRUE(outer_l2_tun_record == outer_vlan_record);
+
+	// LAYER_TYPE_PPPOE
+	const struct layer_record *outer_pppoe_record = packet_get_outermost_layer(&handler, LAYER_TYPE_PPPOE);
+	const struct layer_record *inner_pppoe_record = packet_get_innermost_layer(&handler, LAYER_TYPE_PPPOE);
+
+	EXPECT_TRUE(outer_pppoe_record != nullptr);
+	EXPECT_TRUE(inner_pppoe_record != nullptr);
+	EXPECT_TRUE(outer_pppoe_record == inner_pppoe_record);
+	EXPECT_TRUE(outer_pppoe_record->hdr_offset == 18);
+	EXPECT_TRUE(outer_pppoe_record->hdr_len == 8);
+	EXPECT_TRUE(outer_pppoe_record->pld_len == 52);
+
+	// LAYER_TYPE_L2_TUN
+	const struct layer_record *inner_l2_tun_record = packet_get_innermost_layer(&handler, LAYER_TYPE_L2_TUN);
+
+	EXPECT_TRUE(inner_l2_tun_record != nullptr);
+	EXPECT_TRUE(inner_l2_tun_record == outer_pppoe_record);
+
+	// LAYER_TYPE_IPV4
+	const struct layer_record *outer_ipv4_record = packet_get_outermost_layer(&handler, LAYER_TYPE_IPV4);
+	const struct layer_record *inner_ipv4_record = packet_get_innermost_layer(&handler, LAYER_TYPE_IPV4);
+
+	EXPECT_TRUE(outer_ipv4_record != nullptr);
+	EXPECT_TRUE(inner_ipv4_record != nullptr);
+	EXPECT_TRUE(outer_ipv4_record == inner_ipv4_record);
+
+	EXPECT_TRUE(outer_ipv4_record->hdr_offset == 26);
+	EXPECT_TRUE(outer_ipv4_record->hdr_len == 20);
+	EXPECT_TRUE(outer_ipv4_record->pld_len == 32);
+
+	// LAYER_TYPE_L3
+	const struct layer_record *outer_l3_record = packet_get_outermost_layer(&handler, LAYER_TYPE_L3);
+	const struct layer_record *inner_l3_record = packet_get_innermost_layer(&handler, LAYER_TYPE_L3);
+
+	EXPECT_TRUE(outer_l3_record != nullptr);
+	EXPECT_TRUE(inner_l3_record != nullptr);
+	EXPECT_TRUE(outer_l3_record == inner_l3_record);
+	EXPECT_TRUE(outer_l3_record == outer_ipv4_record);
+
+	// LAYER_TYPE_TCP
+	const struct layer_record *outer_tcp_record = packet_get_outermost_layer(&handler, LAYER_TYPE_TCP);
+	const struct layer_record *inner_tcp_record = packet_get_innermost_layer(&handler, LAYER_TYPE_TCP);
+
+	EXPECT_TRUE(outer_tcp_record != nullptr);
+	EXPECT_TRUE(inner_tcp_record != nullptr);
+	EXPECT_TRUE(outer_tcp_record == inner_tcp_record);
+	EXPECT_TRUE(outer_tcp_record->hdr_offset == 46);
+	EXPECT_TRUE(outer_tcp_record->hdr_len == 32);
+	EXPECT_TRUE(outer_tcp_record->pld_len == 0);
+
+	// LAYER_TYPE_L4
+	const struct layer_record *outer_l4_record = packet_get_outermost_layer(&handler, LAYER_TYPE_L4);
+	const struct layer_record *inner_l4_record = packet_get_innermost_layer(&handler, LAYER_TYPE_L4);
+
+	EXPECT_TRUE(outer_l4_record != nullptr);
+	EXPECT_TRUE(inner_l4_record != nullptr);
+	EXPECT_TRUE(outer_l4_record == inner_l4_record);
+	EXPECT_TRUE(outer_l4_record == outer_tcp_record);
+
+	/******************************************************
+	 * packet_get_outermost/innermost_tuple2
+	 ******************************************************/
+
+	struct tuple2 outer_tuple2;
+	struct tuple2 inner_tuple2;
+	EXPECT_TRUE(packet_get_outermost_tuple2(&handler, &outer_tuple2) == 0);
+	EXPECT_TRUE(packet_get_innermost_tuple2(&handler, &inner_tuple2) == 0);
+	memset(buffer, 0, sizeof(buffer));
+	tuple2_tostring(&outer_tuple2, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "100.65.55.0 -> 91.185.14.33");
+	tuple2_tostring(&inner_tuple2, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "100.65.55.0 -> 91.185.14.33");
+
+	/******************************************************
+	 * packet_get_outermost/innermost_tuple4
+	 ******************************************************/
+
+	struct tuple4 outer_tuple4;
+	struct tuple4 inner_tuple4;
+	EXPECT_TRUE(packet_get_outermost_tuple4(&handler, &outer_tuple4) == 0);
+	EXPECT_TRUE(packet_get_innermost_tuple4(&handler, &inner_tuple4) == 0);
+	memset(buffer, 0, sizeof(buffer));
+	tuple4_tostring(&outer_tuple4, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "100.65.55.0:34532 -> 91.185.14.33:443");
+	memset(buffer, 0, sizeof(buffer));
+	tuple4_tostring(&inner_tuple4, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "100.65.55.0:34532 -> 91.185.14.33:443");
+
+	/******************************************************
+	 * packet_get_outermost/innermost_tuple6
+	 ******************************************************/
+
+	struct tuple6 outer_tuple6;
+	struct tuple6 inner_tuple6;
+	EXPECT_TRUE(packet_get_outermost_tuple6(&handler, &outer_tuple6) == 0);
+	EXPECT_TRUE(packet_get_innermost_tuple6(&handler, &inner_tuple6) == 0);
+	memset(buffer, 0, sizeof(buffer));
+	tuple6_tostring(&outer_tuple6, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "100.65.55.0:34532 -> 91.185.14.33:443, proto: 6, zone: 0");
+	memset(buffer, 0, sizeof(buffer));
+	tuple6_tostring(&inner_tuple6, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "100.65.55.0:34532 -> 91.185.14.33:443, proto: 6, zone: 0");
+}
+#endif
+
+/******************************************************************************
+ * Pcap file: 9-ETH_IP6_UDP_GTP_IP6_TCP_TLS.pcap
+ * [Protocols in frame: eth:ethertype:ipv6:udp:gtp:ipv6:tcp:ja3:tls]
+ ******************************************************************************
+ *
+ * Frame 1: 1442 bytes on wire (11536 bits), 1442 bytes captured (11536 bits)
+ * Ethernet II, Src: zte_0e:f5:40 (74:4a:a4:0e:f5:40), Dst: HuaweiTe_40:e9:c2 (ac:b3:b5:40:e9:c2)
+ * 	Destination: HuaweiTe_40:e9:c2 (ac:b3:b5:40:e9:c2)
+ * 	Source: zte_0e:f5:40 (74:4a:a4:0e:f5:40)
+ * 	Type: IPv6 (0x86dd)
+ * Internet Protocol Version 6, Src: 2409:8034:4040:5300::105, Dst: 2409:8034:4025::60:61
+ * 	0110 .... = Version: 6
+ * 	.... 0000 0000 .... .... .... .... .... = Traffic Class: 0x00 (DSCP: CS0, ECN: Not-ECT)
+ * 	.... 0000 0000 0000 0000 0000 = Flow Label: 0x00000
+ * 	Payload Length: 1388
+ * 	Next Header: UDP (17)
+ * 	Hop Limit: 127
+ * 	Source Address: 2409:8034:4040:5300::105
+ * 	Destination Address: 2409:8034:4025::60:61
+ * User Datagram Protocol, Src Port: 2152, Dst Port: 2152
+ * 	Source Port: 2152
+ * 	Destination Port: 2152
+ * 	Length: 1388
+ * 	Checksum: 0xeb00 [unverified]
+ * 	[Checksum Status: Unverified]
+ * 	[Stream index: 0]
+ * 	[Timestamps]
+ * 	UDP payload (1380 bytes)
+ * GPRS Tunneling Protocol
+ * 	Flags: 0x30
+ * 	Message Type: T-PDU (0xff)
+ * 	Length: 1372
+ * 	TEID: 0x024c3cbd (38550717)
+ * Internet Protocol Version 6, Src: 2409:8c34:4400:700:0:4:0:3, Dst: 2409:8934:5082:2100:ecad:e0e4:530a:c269
+ * 	0110 .... = Version: 6
+ * 	.... 0000 0000 .... .... .... .... .... = Traffic Class: 0x00 (DSCP: CS0, ECN: Not-ECT)
+ * 	.... 0000 0000 0000 0000 0000 = Flow Label: 0x00000
+ * 	Payload Length: 1332
+ * 	Next Header: TCP (6)
+ * 	Hop Limit: 56
+ * 	Source Address: 2409:8c34:4400:700:0:4:0:3
+ * 	Destination Address: 2409:8934:5082:2100:ecad:e0e4:530a:c269
+ * Transmission Control Protocol, Src Port: 443, Dst Port: 46582, Seq: 1, Ack: 1, Len: 1312
+ * 	Source Port: 443
+ * 	Destination Port: 46582
+ * 	[Stream index: 0]
+ * 	[Conversation completeness: Incomplete (8)]
+ * 	[TCP Segment Len: 1312]
+ * 	Sequence Number: 1    (relative sequence number)
+ * 	Sequence Number (raw): 2198097831
+ * 	[Next Sequence Number: 1313    (relative sequence number)]
+ * 	Acknowledgment Number: 1    (relative ack number)
+ * 	Acknowledgment number (raw): 2264498872
+ * 	0101 .... = Header Length: 20 bytes (5)
+ * 	Flags: 0x010 (ACK)
+ * 	Window: 529
+ * 	[Calculated window size: 529]
+ * 	[Window size scaling factor: -1 (unknown)]
+ * 	Checksum: 0x2c4b [unverified]
+ * 	[Checksum Status: Unverified]
+ * 	Urgent Pointer: 0
+ * 	[Timestamps]
+ * 	[SEQ/ACK analysis]
+ * 	TCP payload (1312 bytes)
+ * Transport Layer Security
+ */
+
+unsigned char data9[] = {
+	0xac, 0xb3, 0xb5, 0x40, 0xe9, 0xc2, 0x74, 0x4a, 0xa4, 0x0e, 0xf5, 0x40, 0x86, 0xdd, 0x60, 0x00, 0x00, 0x00, 0x05, 0x6c, 0x11, 0x7f, 0x24, 0x09, 0x80, 0x34,
+	0x40, 0x40, 0x53, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x05, 0x24, 0x09, 0x80, 0x34, 0x40, 0x25, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x60,
+	0x00, 0x61, 0x08, 0x68, 0x08, 0x68, 0x05, 0x6c, 0xeb, 0x00, 0x30, 0xff, 0x05, 0x5c, 0x02, 0x4c, 0x3c, 0xbd, 0x60, 0x00, 0x00, 0x00, 0x05, 0x34, 0x06, 0x38,
+	0x24, 0x09, 0x8c, 0x34, 0x44, 0x00, 0x07, 0x00, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x03, 0x24, 0x09, 0x89, 0x34, 0x50, 0x82, 0x21, 0x00, 0xec, 0xad,
+	0xe0, 0xe4, 0x53, 0x0a, 0xc2, 0x69, 0x01, 0xbb, 0xb5, 0xf6, 0x83, 0x04, 0x4f, 0xa7, 0x86, 0xf9, 0x82, 0xb8, 0x50, 0x10, 0x02, 0x11, 0x2c, 0x4b, 0x00, 0x00,
+	0x17, 0x03, 0x03, 0x3c, 0x8c, 0x87, 0xa0, 0x99, 0x23, 0x5b, 0x53, 0x4a, 0x12, 0x1b, 0xf8, 0xba, 0xe8, 0x83, 0xc2, 0x95, 0xda, 0xb8, 0xea, 0x5b, 0xdc, 0x84,
+	0x61, 0xa9, 0x86, 0x7e, 0x43, 0xc7, 0x31, 0x44, 0x6e, 0x11, 0xc1, 0x30, 0x21, 0x03, 0xb4, 0x21, 0x4a, 0xee, 0xc9, 0x2e, 0x14, 0xd2, 0x98, 0x63, 0x12, 0xfe,
+	0x79, 0x58, 0xb3, 0x18, 0xa6, 0x8d, 0x0c, 0x62, 0x67, 0x51, 0xef, 0x02, 0x5a, 0xa8, 0xb3, 0x82, 0x1f, 0xe4, 0x51, 0xba, 0xde, 0xee, 0x83, 0x9c, 0x4e, 0xac,
+	0x4d, 0xa2, 0xb7, 0x6a, 0x82, 0xe7, 0xbb, 0x00, 0xf7, 0x5a, 0xe7, 0x02, 0x71, 0x7e, 0x7d, 0x6f, 0xf2, 0xe5, 0x47, 0xd0, 0xba, 0x3c, 0x51, 0x09, 0x95, 0xcd,
+	0xf6, 0xc9, 0x8b, 0x6f, 0xb0, 0x39, 0x11, 0x0d, 0xe9, 0x0d, 0x4d, 0x29, 0xd4, 0xcb, 0x87, 0xba, 0x11, 0xfa, 0x0d, 0x0b, 0x82, 0x95, 0xa5, 0x84, 0x94, 0x48,
+	0xa2, 0xee, 0xa4, 0xb7, 0xb6, 0x76, 0x13, 0x4d, 0x18, 0x42, 0x91, 0x77, 0xad, 0x82, 0x38, 0xee, 0x34, 0x1c, 0xb7, 0xf6, 0x39, 0xdc, 0xa4, 0x23, 0xa1, 0x7c,
+	0xa5, 0x0b, 0x7e, 0x4c, 0x8b, 0x81, 0x31, 0x48, 0xea, 0xf4, 0x18, 0x37, 0x09, 0x0a, 0x53, 0x13, 0x05, 0x90, 0x26, 0x10, 0x69, 0xb2, 0xa3, 0x36, 0xbc, 0xa5,
+	0x83, 0xd8, 0x16, 0x77, 0x98, 0xc8, 0x21, 0x38, 0xd9, 0x88, 0x0c, 0xa7, 0x16, 0x97, 0x4e, 0x20, 0x6d, 0x68, 0xda, 0x1b, 0x3b, 0x4a, 0x62, 0xe0, 0x36, 0x0d,
+	0xbf, 0x30, 0x71, 0xb1, 0xe9, 0xbe, 0x47, 0x77, 0x99, 0xb9, 0xe6, 0x26, 0xab, 0x81, 0x2e, 0x46, 0xf1, 0x1b, 0x1e, 0xfb, 0xd7, 0x81, 0x60, 0x21, 0x4a, 0x71,
+	0x85, 0xf7, 0x9c, 0x9c, 0xd4, 0x1c, 0x52, 0xc4, 0x3d, 0x8d, 0x72, 0xf6, 0x7c, 0xd3, 0x58, 0x79, 0x0d, 0x78, 0xd7, 0x7c, 0x29, 0x2b, 0xc3, 0x96, 0x1d, 0xc7,
+	0x96, 0x50, 0x42, 0xd7, 0xda, 0xeb, 0x29, 0x8e, 0x2a, 0x72, 0x23, 0x57, 0x0f, 0x6f, 0x37, 0x35, 0xb2, 0x42, 0x76, 0x78, 0xbf, 0xbf, 0x8c, 0x3f, 0x31, 0xa2,
+	0x51, 0xec, 0x9e, 0x0d, 0xfd, 0xf2, 0xaf, 0x71, 0xa0, 0x4f, 0xa9, 0xf6, 0x19, 0xcf, 0x3e, 0x4b, 0xc8, 0xaa, 0x38, 0x06, 0xa1, 0x15, 0xde, 0xde, 0xef, 0x9b,
+	0x25, 0xa3, 0xcc, 0x47, 0xca, 0x29, 0x30, 0x65, 0x5f, 0xc1, 0x8b, 0x12, 0x63, 0x79, 0xcd, 0x57, 0x4d, 0x99, 0xc0, 0xcd, 0xbe, 0x62, 0xcb, 0xc3, 0xf2, 0x6b,
+	0x0b, 0x40, 0xc5, 0xee, 0x79, 0x0a, 0xa4, 0x75, 0x56, 0xe7, 0xe7, 0xf2, 0xfd, 0xe0, 0x72, 0x78, 0x04, 0xa2, 0x50, 0x31, 0x09, 0x8b, 0x57, 0xc3, 0x85, 0x4e,
+	0xc4, 0xae, 0xde, 0x8a, 0xfa, 0xf6, 0x31, 0x06, 0xd2, 0x07, 0x25, 0x40, 0xce, 0x0d, 0xfd, 0x26, 0x98, 0x41, 0xa3, 0xa9, 0xa2, 0x8d, 0x8b, 0x7f, 0x6d, 0x63,
+	0x87, 0x7e, 0x75, 0x2f, 0x78, 0xc9, 0xd5, 0x04, 0xb2, 0x4f, 0xc9, 0x94, 0xa7, 0x7f, 0xbc, 0x75, 0x7b, 0xb6, 0xfb, 0x2c, 0x46, 0xf6, 0xde, 0x36, 0x31, 0x2a,
+	0x32, 0x1d, 0x7f, 0x30, 0x9e, 0x4a, 0x84, 0x69, 0x66, 0xac, 0xef, 0xbe, 0xb3, 0x83, 0x8c, 0xb8, 0x30, 0xd2, 0x3f, 0xcf, 0xb5, 0xbb, 0x65, 0xaa, 0xe7, 0x6b,
+	0x74, 0x48, 0x2c, 0xb2, 0x72, 0x2b, 0x78, 0xaf, 0xd0, 0x71, 0x04, 0xa9, 0xb4, 0x65, 0xd9, 0xfc, 0x74, 0x23, 0xff, 0x89, 0xc1, 0x16, 0x23, 0xac, 0x59, 0x16,
+	0x89, 0x41, 0xc3, 0xdb, 0xdb, 0x5b, 0x9a, 0x3d, 0x08, 0xc4, 0x12, 0x28, 0xf8, 0x10, 0xa5, 0xad, 0xc6, 0x81, 0xc0, 0x61, 0x48, 0xba, 0x9d, 0xef, 0xc7, 0xf8,
+	0xad, 0x9a, 0xbd, 0x87, 0xfa, 0x7f, 0xa2, 0x4e, 0x4d, 0xe0, 0x19, 0xd5, 0x47, 0xc7, 0xd0, 0xfb, 0x00, 0x7b, 0xbf, 0x17, 0x80, 0xfe, 0xf5, 0x27, 0xec, 0x94,
+	0x44, 0x3d, 0x4a, 0x34, 0x49, 0x60, 0xb4, 0x8d, 0x71, 0x6d, 0x9c, 0xf4, 0x4c, 0x33, 0xa9, 0x49, 0x58, 0x58, 0x6f, 0xe1, 0xd1, 0x7d, 0x36, 0x51, 0xf4, 0xd8,
+	0x0d, 0x0b, 0xfc, 0xeb, 0xae, 0x58, 0x06, 0x08, 0xbf, 0x67, 0x07, 0x28, 0x7e, 0x68, 0x65, 0x79, 0x86, 0xfb, 0x43, 0x0f, 0x0a, 0xef, 0xd0, 0x97, 0x33, 0x10,
+	0x7a, 0x20, 0xe8, 0x22, 0xe5, 0xdc, 0x0c, 0xa2, 0xa5, 0x50, 0x1b, 0x08, 0x15, 0xc2, 0xec, 0xd2, 0x06, 0x25, 0xd0, 0x3b, 0xfd, 0xe3, 0xa2, 0x6f, 0x41, 0x15,
+	0x6d, 0x9f, 0x5f, 0xc4, 0x07, 0x5c, 0x99, 0x63, 0xd9, 0xd7, 0xdc, 0x90, 0xc9, 0x8f, 0x3a, 0x4b, 0x6a, 0x84, 0xe8, 0x3c, 0xc7, 0x71, 0x50, 0x71, 0x86, 0x71,
+	0x7d, 0x54, 0x84, 0x7b, 0xb7, 0xca, 0xd5, 0x42, 0xaf, 0x88, 0xa5, 0xae, 0xa4, 0x9c, 0xfd, 0x71, 0x71, 0x0f, 0x67, 0xaa, 0x1b, 0x61, 0xd7, 0xf4, 0x50, 0x21,
+	0x9d, 0x80, 0x6e, 0x54, 0xcd, 0xb6, 0xb9, 0x02, 0x3e, 0x59, 0x50, 0xff, 0xf2, 0xda, 0x21, 0x5c, 0x50, 0x6d, 0x64, 0x8c, 0x33, 0x75, 0x2a, 0xa4, 0x56, 0xb3,
+	0xa8, 0xdb, 0xba, 0xbe, 0x52, 0xd4, 0xe5, 0x29, 0x68, 0xe2, 0x6b, 0x94, 0x6b, 0xb3, 0x90, 0x63, 0x91, 0x1a, 0x95, 0xb5, 0xd7, 0x10, 0x1b, 0xd9, 0x93, 0x4f,
+	0x33, 0xb6, 0x6a, 0x4e, 0xcd, 0x40, 0x9d, 0x47, 0x76, 0x3e, 0x4b, 0xc7, 0x2f, 0x16, 0x96, 0x64, 0x9d, 0x4e, 0x8c, 0xfb, 0x0f, 0xd2, 0xec, 0x6c, 0xba, 0xf2,
+	0x9c, 0xca, 0xd2, 0x3e, 0x64, 0x37, 0x32, 0x20, 0xd7, 0x4c, 0xb0, 0xe7, 0xd3, 0x75, 0x51, 0x3a, 0x94, 0xc1, 0xdf, 0x1c, 0xb3, 0x10, 0xd5, 0x1e, 0xcf, 0x7c,
+	0xb7, 0xab, 0x4a, 0x93, 0xf0, 0x78, 0x58, 0x28, 0x63, 0x10, 0xee, 0xb0, 0xd6, 0x14, 0x81, 0x47, 0xeb, 0x2e, 0xc8, 0x6e, 0x33, 0x7e, 0xf3, 0x2d, 0xc8, 0xdb,
+	0x29, 0x0c, 0x80, 0xe4, 0x2f, 0x10, 0x07, 0x8e, 0x08, 0x86, 0x97, 0x1b, 0x39, 0x98, 0x39, 0x06, 0xb3, 0x85, 0x53, 0xb7, 0xbb, 0x65, 0x65, 0x85, 0x0e, 0x0a,
+	0x7d, 0x29, 0x3d, 0x3f, 0x52, 0xc2, 0x7b, 0x2b, 0x30, 0x94, 0x99, 0x6a, 0x4b, 0xad, 0xe9, 0xec, 0xcb, 0xcd, 0xae, 0x97, 0x45, 0x54, 0xd5, 0x00, 0x5e, 0xd8,
+	0xac, 0xeb, 0x99, 0xdc, 0x58, 0x0b, 0x01, 0xeb, 0x32, 0x22, 0xc4, 0xec, 0x4f, 0xd2, 0x15, 0x03, 0x30, 0x88, 0xc7, 0x28, 0xaf, 0x78, 0xf5, 0x38, 0x84, 0x3b,
+	0x3b, 0xe9, 0x29, 0x71, 0x50, 0xa3, 0x07, 0x49, 0x3b, 0xc6, 0x97, 0xc6, 0xf9, 0x53, 0x95, 0x51, 0x65, 0x7e, 0xd7, 0xd4, 0xe8, 0x76, 0x6a, 0x6d, 0x37, 0x6b,
+	0xa5, 0x59, 0xaa, 0x14, 0x18, 0x8c, 0x8d, 0x65, 0x78, 0x67, 0xfb, 0x60, 0x56, 0xab, 0x04, 0xa0, 0xc2, 0x93, 0x46, 0xf1, 0x2b, 0x0d, 0x3b, 0x38, 0x62, 0x62,
+	0x5e, 0xc8, 0x30, 0xf9, 0x45, 0x28, 0x6f, 0xa1, 0xb1, 0x88, 0xf1, 0x2b, 0x3b, 0xf8, 0xae, 0x91, 0x52, 0xc3, 0x72, 0x86, 0xe4, 0xec, 0xc3, 0x54, 0x86, 0xbf,
+	0x8f, 0x33, 0xb1, 0x0f, 0x42, 0xc5, 0x9c, 0xb8, 0xc2, 0x67, 0x8b, 0xac, 0x78, 0xd7, 0x63, 0xab, 0x05, 0xc6, 0x6c, 0x37, 0xa1, 0x28, 0xef, 0x95, 0xc9, 0xf5,
+	0x12, 0x38, 0x54, 0x34, 0x2e, 0x03, 0x6a, 0xaa, 0xa9, 0x97, 0x72, 0x22, 0x9f, 0x20, 0xec, 0x9e, 0x29, 0x09, 0xd8, 0x38, 0xd1, 0x86, 0x82, 0x99, 0xbd, 0x2a,
+	0x03, 0xe9, 0x3d, 0xbd, 0xea, 0xc5, 0x8b, 0xb0, 0x4c, 0x8b, 0x7e, 0x78, 0x08, 0xef, 0x39, 0xa8, 0xb4, 0x47, 0xce, 0x44, 0xc3, 0x3f, 0x52, 0xe4, 0xbd, 0x9e,
+	0xf6, 0xed, 0x6f, 0x6c, 0x05, 0x19, 0xa6, 0x0a, 0x1e, 0x48, 0xe3, 0x9b, 0x91, 0x61, 0xef, 0xf5, 0x91, 0x39, 0x70, 0x44, 0x1c, 0x08, 0x2e, 0x2c, 0x6c, 0x27,
+	0xb9, 0x0e, 0xcc, 0x74, 0x69, 0xa5, 0xf8, 0x19, 0xd6, 0xbf, 0x57, 0x6c, 0x9a, 0x91, 0x74, 0xfd, 0xc2, 0x31, 0x32, 0x12, 0x06, 0xa3, 0x69, 0x71, 0xda, 0x40,
+	0xa1, 0xf3, 0xb5, 0x9a, 0x43, 0xcc, 0xb4, 0x3c, 0x16, 0x40, 0x65, 0x2b, 0x02, 0xac, 0x5c, 0xae, 0xd6, 0x34, 0x34, 0xe3, 0x69, 0x76, 0x2c, 0xa8, 0xdd, 0x04,
+	0x92, 0xa6, 0x7a, 0xc0, 0x87, 0x70, 0x8b, 0x85, 0xba, 0x5d, 0xbb, 0x62, 0x70, 0xcc, 0x1f, 0x21, 0x2c, 0x7e, 0xc3, 0x77, 0xcf, 0x23, 0x22, 0xf4, 0x16, 0x8e,
+	0xf1, 0x3d, 0xdc, 0x33, 0x99, 0x5e, 0xaa, 0xa2, 0x50, 0x68, 0xde, 0x03, 0x44, 0xbb, 0xc7, 0x16, 0x2a, 0xf2, 0x08, 0xeb, 0x3d, 0x12, 0x6d, 0xcb, 0x2a, 0xaf,
+	0xb4, 0x79, 0xdb, 0x74, 0x5e, 0x54, 0x89, 0x73, 0x0c, 0x48, 0x9c, 0x03, 0x33, 0xd2, 0x92, 0x22, 0xdb, 0x3a, 0xa0, 0x8c, 0xe2, 0x30, 0x6f, 0x39, 0xe4, 0xa9,
+	0x24, 0x04, 0xbb, 0x85, 0x7d, 0x62, 0xc5, 0xa9, 0x98, 0x92, 0xef, 0xc6, 0xc8, 0xd1, 0x81, 0xad, 0x95, 0x40, 0x27, 0x09, 0xc7, 0x43, 0xcd, 0xb6, 0x94, 0xfc,
+	0x1c, 0x7d, 0x1c, 0xd3, 0x47, 0xfe, 0x62, 0x9c, 0xfa, 0xeb, 0xfc, 0x02, 0x2e, 0x48, 0x62, 0xcf, 0x63, 0xdb, 0x63, 0xd9, 0x21, 0x86, 0xe8, 0x96, 0x54, 0xeb,
+	0x6a, 0xa8, 0x78, 0x3c, 0x5b, 0xb6, 0xde, 0xa9, 0x04, 0x48, 0x63, 0xb2, 0x10, 0x02, 0x6a, 0x7f, 0x6d, 0xc8, 0x04, 0xdd, 0x99, 0x25, 0x08, 0xff, 0x80, 0x11,
+	0x53, 0xfb, 0x7a, 0x07, 0x39, 0xd9, 0x97, 0xca, 0xf0, 0xa7, 0x46, 0x9c, 0xc2, 0xae, 0x2e, 0x05, 0x62, 0xa0, 0xd5, 0x5d, 0x17, 0x0e, 0x5c, 0x7e, 0x9a, 0xb2,
+	0xb7, 0x9d, 0xd4, 0x4f, 0xe3, 0xac, 0x64, 0xdb, 0x6f, 0x1d, 0xdf, 0xd8, 0x41, 0xd7, 0xd9, 0x50, 0x55, 0x30, 0xeb, 0x4b, 0x19, 0xce, 0x78, 0x1f, 0xa8, 0x1e,
+	0x87, 0x9c, 0x8f, 0x93, 0x97, 0xd4, 0xa2, 0x28, 0x2c, 0x79, 0x22, 0xc8};
+
+#if 1
+TEST(DATA_PACKET, ETH_IP6_UDP_GTP_IP6_TCP_TLS)
+{
+	char buffer[256];
+	struct packet handler;
+
+	const char *payload = packet_parse(&handler, (const char *)data9, sizeof(data9));
+	EXPECT_TRUE(payload != nullptr);
+	EXPECT_TRUE((char *)payload - (char *)&data9 == 130);
+	packet_print(&handler);
+
+	/******************************************************
+	 * packet_get_outermost/innermost_layer
+	 ******************************************************/
+
+	// LAYER_TYPE_ETHER
+	const struct layer_record *outer_eth_record = packet_get_outermost_layer(&handler, LAYER_TYPE_ETHER);
+	const struct layer_record *inner_eth_record = packet_get_innermost_layer(&handler, LAYER_TYPE_ETHER);
+
+	EXPECT_TRUE(outer_eth_record != nullptr);
+	EXPECT_TRUE(inner_eth_record != nullptr);
+	EXPECT_TRUE(outer_eth_record == inner_eth_record);
+	EXPECT_TRUE(outer_eth_record->hdr_offset == 0);
+	EXPECT_TRUE(outer_eth_record->hdr_len == 14);
+	EXPECT_TRUE(outer_eth_record->pld_len == 1428);
+
+	// LAYER_TYPE_L2
+	const struct layer_record *outer_l2_record = packet_get_outermost_layer(&handler, LAYER_TYPE_L2);
+	const struct layer_record *inner_l2_record = packet_get_innermost_layer(&handler, LAYER_TYPE_L2);
+
+	EXPECT_TRUE(outer_l2_record != nullptr);
+	EXPECT_TRUE(inner_l2_record != nullptr);
+	EXPECT_TRUE(outer_l2_record == inner_l2_record);
+	EXPECT_TRUE(outer_l2_record == outer_eth_record);
+
+	// LAYER_TYPE_IPV6
+	const struct layer_record *outer_ipv6_record = packet_get_outermost_layer(&handler, LAYER_TYPE_IPV6);
+
+	EXPECT_TRUE(outer_ipv6_record != nullptr);
+	EXPECT_TRUE(outer_ipv6_record->hdr_offset == 14);
+	EXPECT_TRUE(outer_ipv6_record->hdr_len == 40);
+	EXPECT_TRUE(outer_ipv6_record->pld_len == 1388);
+
+	// LAYER_TYPE_L3
+	const struct layer_record *outer_l3_record = packet_get_outermost_layer(&handler, LAYER_TYPE_L3);
+
+	EXPECT_TRUE(outer_l3_record != nullptr);
+	EXPECT_TRUE(outer_l3_record == outer_ipv6_record);
+
+	// LAYER_TYPE_UDP
+	const struct layer_record *outer_udp_record = packet_get_outermost_layer(&handler, LAYER_TYPE_UDP);
+	const struct layer_record *inner_udp_record = packet_get_innermost_layer(&handler, LAYER_TYPE_UDP);
+
+	EXPECT_TRUE(outer_udp_record != nullptr);
+	EXPECT_TRUE(inner_udp_record != nullptr);
+	EXPECT_TRUE(outer_udp_record == inner_udp_record);
+	EXPECT_TRUE(outer_udp_record->hdr_offset == 54);
+	EXPECT_TRUE(outer_udp_record->hdr_len == 8);
+	EXPECT_TRUE(outer_udp_record->pld_len == 1380);
+
+	// LAYER_TYPE_L4
+	const struct layer_record *outer_l4_record = packet_get_outermost_layer(&handler, LAYER_TYPE_L4);
+
+	EXPECT_TRUE(outer_l4_record != nullptr);
+	EXPECT_TRUE(outer_l4_record == outer_udp_record);
+
+	// LAYER_TYPE_GTPV1_U
+	const struct layer_record *outer_gtp_record = packet_get_outermost_layer(&handler, LAYER_TYPE_GTPV1_U);
+	const struct layer_record *inner_gtp_record = packet_get_innermost_layer(&handler, LAYER_TYPE_GTPV1_U);
+
+	EXPECT_TRUE(outer_gtp_record != nullptr);
+	EXPECT_TRUE(inner_gtp_record != nullptr);
+	EXPECT_TRUE(outer_gtp_record == inner_gtp_record);
+	EXPECT_TRUE(outer_gtp_record->hdr_offset == 62);
+	EXPECT_TRUE(outer_gtp_record->hdr_len == 8);
+	EXPECT_TRUE(outer_gtp_record->pld_len == 1372);
+
+	// LAYER_TYPE_IPV6
+	const struct layer_record *inner_ipv6_record = packet_get_innermost_layer(&handler, LAYER_TYPE_IPV6);
+
+	EXPECT_TRUE(inner_ipv6_record != nullptr);
+	EXPECT_TRUE(inner_ipv6_record->hdr_offset == 70);
+	EXPECT_TRUE(inner_ipv6_record->hdr_len == 40);
+	EXPECT_TRUE(inner_ipv6_record->pld_len == 1332);
+
+	// LAYER_TYPE_L3
+	const struct layer_record *inner_l3_record = packet_get_innermost_layer(&handler, LAYER_TYPE_L3);
+
+	EXPECT_TRUE(inner_l3_record != nullptr);
+	EXPECT_TRUE(inner_l3_record == inner_ipv6_record);
+
+	// LAYER_TYPE_TCP
+	const struct layer_record *outer_tcp_record = packet_get_outermost_layer(&handler, LAYER_TYPE_TCP);
+	const struct layer_record *inner_tcp_record = packet_get_innermost_layer(&handler, LAYER_TYPE_TCP);
+
+	EXPECT_TRUE(outer_tcp_record != nullptr);
+	EXPECT_TRUE(inner_tcp_record != nullptr);
+	EXPECT_TRUE(outer_tcp_record == inner_tcp_record);
+	EXPECT_TRUE(outer_tcp_record->hdr_offset == 110);
+	EXPECT_TRUE(outer_tcp_record->hdr_len == 20);
+	EXPECT_TRUE(outer_tcp_record->pld_len == 1312);
+
+	// LAYER_TYPE_L4
+	const struct layer_record *inner_l4_record = packet_get_innermost_layer(&handler, LAYER_TYPE_L4);
+
+	EXPECT_TRUE(inner_l4_record != nullptr);
+	EXPECT_TRUE(inner_l4_record == outer_tcp_record);
+
+	/******************************************************
+	 * packet_get_outermost/innermost_tuple2
+	 ******************************************************/
+
+	struct tuple2 outer_tuple2;
+	struct tuple2 inner_tuple2;
+	EXPECT_TRUE(packet_get_outermost_tuple2(&handler, &outer_tuple2) == 0);
+	EXPECT_TRUE(packet_get_innermost_tuple2(&handler, &inner_tuple2) == 0);
+	memset(buffer, 0, sizeof(buffer));
+	tuple2_tostring(&outer_tuple2, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "2409:8034:4040:5300::105 -> 2409:8034:4025::60:61");
+	memset(buffer, 0, sizeof(buffer));
+	tuple2_tostring(&inner_tuple2, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "2409:8c34:4400:700:0:4:0:3 -> 2409:8934:5082:2100:ecad:e0e4:530a:c269");
+
+	/******************************************************
+	 * packet_get_outermost/innermost_tuple4
+	 ******************************************************/
+
+	struct tuple4 outer_tuple4;
+	struct tuple4 inner_tuple4;
+	EXPECT_TRUE(packet_get_outermost_tuple4(&handler, &outer_tuple4) == 0);
+	EXPECT_TRUE(packet_get_innermost_tuple4(&handler, &inner_tuple4) == 0);
+	memset(buffer, 0, sizeof(buffer));
+	tuple4_tostring(&outer_tuple4, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "2409:8034:4040:5300::105:2152 -> 2409:8034:4025::60:61:2152");
+	memset(buffer, 0, sizeof(buffer));
+	tuple4_tostring(&inner_tuple4, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "2409:8c34:4400:700:0:4:0:3:443 -> 2409:8934:5082:2100:ecad:e0e4:530a:c269:46582");
+
+	/******************************************************
+	 * packet_get_outermost/innermost_tuple6
+	 ******************************************************/
+
+	struct tuple6 outer_tuple6;
+	struct tuple6 inner_tuple6;
+	EXPECT_TRUE(packet_get_outermost_tuple6(&handler, &outer_tuple6) == 0);
+	EXPECT_TRUE(packet_get_innermost_tuple6(&handler, &inner_tuple6) == 0);
+	memset(buffer, 0, sizeof(buffer));
+	tuple6_tostring(&outer_tuple6, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "2409:8034:4040:5300::105:2152 -> 2409:8034:4025::60:61:2152, proto: 17, zone: 0");
+	memset(buffer, 0, sizeof(buffer));
+	tuple6_tostring(&inner_tuple6, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "2409:8c34:4400:700:0:4:0:3:443 -> 2409:8934:5082:2100:ecad:e0e4:530a:c269:46582, proto: 6, zone: 0");
+}
+#endif
+
+/******************************************************************************
+ * Pcap file: 10-ETH_IP6_UDP_GTP_IP4_TCP_TLS.pcap
+ * [Protocols in frame: eth:ethertype:ipv6:udp:gtp:ip:tcp:ja3:tls]
+ ******************************************************************************
+ *
+ * Frame 1: 1470 bytes on wire (11760 bits), 1470 bytes captured (11760 bits)
+ * Ethernet II, Src: HuaweiTe_62:ee:70 (60:d7:55:62:ee:70), Dst: zte_0e:f5:1c (74:4a:a4:0e:f5:1c)
+ * 	Destination: zte_0e:f5:1c (74:4a:a4:0e:f5:1c)
+ * 	Source: HuaweiTe_62:ee:70 (60:d7:55:62:ee:70)
+ * 	Type: IPv6 (0x86dd)
+ * Internet Protocol Version 6, Src: 2409:8034:4025::50:a31, Dst: 2409:8034:4040:5301::204
+ * 	0110 .... = Version: 6
+ * 	.... 0000 0000 .... .... .... .... .... = Traffic Class: 0x00 (DSCP: CS0, ECN: Not-ECT)
+ * 	.... 0000 0000 0000 0000 0000 = Flow Label: 0x00000
+ * 	Payload Length: 1416
+ * 	Next Header: UDP (17)
+ * 	Hop Limit: 252
+ * 	Source Address: 2409:8034:4025::50:a31
+ * 	Destination Address: 2409:8034:4040:5301::204
+ * User Datagram Protocol, Src Port: 2152, Dst Port: 2152
+ * 	Source Port: 2152
+ * 	Destination Port: 2152
+ * 	Length: 1416
+ * 	Checksum: 0xc8df [unverified]
+ * 	[Checksum Status: Unverified]
+ * 	[Stream index: 0]
+ * 	[Timestamps]
+ * 	UDP payload (1408 bytes)
+ * GPRS Tunneling Protocol
+ * 	Flags: 0x30
+ * 	Message Type: T-PDU (0xff)
+ * 	Length: 1400
+ * 	TEID: 0x6c2a4753 (1814710099)
+ * Internet Protocol Version 4, Src: 10.49.115.138, Dst: 121.196.250.66
+ * 	0100 .... = Version: 4
+ * 	.... 0101 = Header Length: 20 bytes (5)
+ * 	Differentiated Services Field: 0x00 (DSCP: CS0, ECN: Not-ECT)
+ * 	Total Length: 1400
+ * 	Identification: 0x0003 (3)
+ * 	010. .... = Flags: 0x2, Don't fragment
+ * 	...0 0000 0000 0000 = Fragment Offset: 0
+ * 	Time to Live: 64
+ * 	Protocol: TCP (6)
+ * 	Header Checksum: 0x43bb [validation disabled]
+ * 	[Header checksum status: Unverified]
+ * 	Source Address: 10.49.115.138
+ * 	Destination Address: 121.196.250.66
+ * Transmission Control Protocol, Src Port: 50081, Dst Port: 443, Seq: 1, Ack: 1, Len: 1348
+ * 	Source Port: 50081
+ * 	Destination Port: 443
+ * 	[Stream index: 0]
+ * 	[Conversation completeness: Incomplete (8)]
+ * 	[TCP Segment Len: 1348]
+ * 	Sequence Number: 1    (relative sequence number)
+ * 	Sequence Number (raw): 1522577104
+ * 	[Next Sequence Number: 1349    (relative sequence number)]
+ * 	Acknowledgment Number: 1    (relative ack number)
+ * 	Acknowledgment number (raw): 3419365570
+ * 	1000 .... = Header Length: 32 bytes (8)
+ * 	Flags: 0x010 (ACK)
+ * 	Window: 2038
+ * 	[Calculated window size: 2038]
+ * 	[Window size scaling factor: -1 (unknown)]
+ * 	Checksum: 0xd3c2 [unverified]
+ * 	[Checksum Status: Unverified]
+ * 	Urgent Pointer: 0
+ * 	Options: (12 bytes), No-Operation (NOP), No-Operation (NOP), Timestamps
+ * 	[Timestamps]
+ * 	[SEQ/ACK analysis]
+ * 	TCP payload (1348 bytes)
+ * Transport Layer Security
+ */
+
+unsigned char data10[] = {
+	0x74, 0x4a, 0xa4, 0x0e, 0xf5, 0x1c, 0x60, 0xd7, 0x55, 0x62, 0xee, 0x70, 0x86, 0xdd, 0x60, 0x00, 0x00, 0x00, 0x05, 0x88, 0x11, 0xfc, 0x24, 0x09, 0x80, 0x34,
+	0x40, 0x25, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x50, 0x0a, 0x31, 0x24, 0x09, 0x80, 0x34, 0x40, 0x40, 0x53, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x02, 0x04, 0x08, 0x68, 0x08, 0x68, 0x05, 0x88, 0xc8, 0xdf, 0x30, 0xff, 0x05, 0x78, 0x6c, 0x2a, 0x47, 0x53, 0x45, 0x00, 0x05, 0x78, 0x00, 0x03, 0x40, 0x00,
+	0x40, 0x06, 0x43, 0xbb, 0x0a, 0x31, 0x73, 0x8a, 0x79, 0xc4, 0xfa, 0x42, 0xc3, 0xa1, 0x01, 0xbb, 0x5a, 0xc0, 0xae, 0xd0, 0xcb, 0xcf, 0x60, 0xc2, 0x80, 0x10,
+	0x07, 0xf6, 0xd3, 0xc2, 0x00, 0x00, 0x01, 0x01, 0x08, 0x0a, 0x85, 0x14, 0x0e, 0xb0, 0xcc, 0x45, 0xf8, 0x5f, 0xef, 0x49, 0x45, 0xa0, 0xbe, 0x21, 0xd6, 0x46,
+	0x9f, 0xb5, 0x17, 0xb2, 0xfe, 0x61, 0x2d, 0xed, 0x4f, 0x0c, 0x1e, 0xb5, 0xda, 0x91, 0x40, 0x87, 0xab, 0x02, 0x0d, 0x01, 0xc8, 0xf1, 0x24, 0x05, 0x8a, 0x9d,
+	0x8d, 0xfc, 0xbb, 0x82, 0x24, 0xf5, 0x7d, 0x2d, 0x10, 0x66, 0x30, 0x2a, 0xaa, 0x4a, 0x51, 0x8d, 0xe9, 0x9a, 0x65, 0xcf, 0x89, 0x0c, 0x9e, 0x0d, 0x82, 0xda,
+	0x5e, 0xd3, 0x98, 0xe3, 0x23, 0xf7, 0x5a, 0xd4, 0x88, 0x94, 0xd2, 0xdf, 0xbe, 0x44, 0x20, 0x2b, 0x21, 0x2d, 0x38, 0xca, 0x29, 0x5e, 0xa3, 0xb7, 0xbb, 0x34,
+	0x20, 0x42, 0x02, 0x71, 0x04, 0xda, 0xd2, 0xeb, 0xb8, 0x81, 0xa3, 0x48, 0xc8, 0x54, 0xad, 0x42, 0x35, 0xc4, 0x4f, 0x6b, 0x15, 0x50, 0x22, 0x3e, 0x26, 0xb3,
+	0xfc, 0x30, 0x49, 0x71, 0x6f, 0x41, 0x66, 0xa2, 0x2e, 0xe9, 0xd3, 0x1a, 0x69, 0xa8, 0x87, 0x71, 0x65, 0xa2, 0xc7, 0xc7, 0x2b, 0x25, 0x1d, 0x3f, 0xfb, 0xe6,
+	0x05, 0xe1, 0x09, 0xb9, 0x76, 0x1d, 0xb9, 0xf9, 0xaf, 0xb4, 0x79, 0xa1, 0x35, 0x05, 0x59, 0x88, 0xa0, 0x07, 0xb5, 0x2d, 0x02, 0x11, 0x0a, 0x89, 0xf1, 0x67,
+	0xdb, 0xe5, 0x5c, 0x5c, 0xaa, 0x0e, 0x21, 0xa6, 0xa4, 0x1a, 0x9f, 0x9e, 0xc8, 0x2a, 0x36, 0x6f, 0xcc, 0xa3, 0x13, 0x78, 0xf1, 0xbe, 0x34, 0xa0, 0x35, 0xef,
+	0x1f, 0xf4, 0x79, 0xcb, 0x37, 0x3e, 0x77, 0x14, 0xfb, 0x2e, 0x21, 0x4f, 0x6b, 0xe5, 0xe9, 0x3a, 0x90, 0x76, 0xa8, 0x55, 0x09, 0xb6, 0x68, 0xbf, 0x66, 0xae,
+	0xf1, 0x55, 0xc0, 0x76, 0x8f, 0x16, 0x86, 0x49, 0x9a, 0x88, 0x01, 0xdb, 0x78, 0x1f, 0xde, 0xc2, 0x33, 0x92, 0xe3, 0x22, 0xc6, 0x8c, 0x20, 0x17, 0xa0, 0xb2,
+	0x79, 0xf4, 0x60, 0x8e, 0x98, 0x53, 0xcd, 0x8f, 0xb2, 0x8f, 0x80, 0xda, 0x9f, 0xf6, 0x00, 0x0c, 0xf8, 0x6b, 0xdf, 0x7d, 0x93, 0x48, 0x5a, 0x23, 0x35, 0x0e,
+	0x1b, 0xf7, 0x50, 0x87, 0x93, 0x29, 0xaa, 0xa1, 0xb8, 0x98, 0x9f, 0x89, 0xb2, 0x0a, 0x02, 0x27, 0x95, 0x01, 0x84, 0x5a, 0x09, 0xb8, 0xff, 0x23, 0x02, 0x89,
+	0xef, 0x1b, 0x64, 0xb2, 0x38, 0x81, 0xc4, 0x36, 0xe3, 0xda, 0xb5, 0x3b, 0x80, 0x45, 0x52, 0x96, 0xab, 0x0e, 0xdb, 0xb6, 0x9c, 0xcb, 0xc4, 0xe5, 0xb9, 0x72,
+	0x67, 0x57, 0x4b, 0xb9, 0x55, 0xcb, 0x6b, 0xc4, 0xec, 0x46, 0x4d, 0xa3, 0xe0, 0xda, 0xba, 0x70, 0x3d, 0xa6, 0xa7, 0x3f, 0x58, 0xd2, 0x9f, 0xb0, 0x11, 0x66,
+	0xaf, 0x73, 0x09, 0x60, 0x6e, 0xe0, 0x71, 0xa5, 0x65, 0x41, 0x28, 0x3e, 0x70, 0x1d, 0x25, 0x77, 0x6a, 0x4e, 0xed, 0xb9, 0x27, 0x6c, 0xf0, 0xba, 0x54, 0x8d,
+	0x77, 0xfb, 0xb6, 0x4e, 0xe2, 0xab, 0x8f, 0xe3, 0xd4, 0x02, 0x65, 0x0a, 0x49, 0xf3, 0xf9, 0xc7, 0x09, 0x76, 0x81, 0xf4, 0xf8, 0x3e, 0x1f, 0x74, 0x30, 0xaf,
+	0x3b, 0x9e, 0x97, 0x00, 0xde, 0xd8, 0x9a, 0xaf, 0xcc, 0x72, 0xeb, 0x0a, 0xe7, 0xab, 0xc1, 0x53, 0x62, 0x3f, 0x08, 0xba, 0x43, 0x06, 0x13, 0x0a, 0x3b, 0x5c,
+	0xb4, 0xe0, 0xc8, 0xa6, 0x41, 0x45, 0xaa, 0x1a, 0xc9, 0x88, 0x86, 0x31, 0x25, 0x02, 0x4a, 0x76, 0x66, 0xb6, 0x6d, 0xff, 0x50, 0x1d, 0x3c, 0xf3, 0x2d, 0xfe,
+	0x7b, 0xb2, 0x75, 0x5d, 0x9a, 0x9a, 0xe5, 0x39, 0x31, 0x4f, 0x7b, 0xa5, 0x6f, 0x94, 0xed, 0x31, 0xd4, 0x61, 0xc7, 0x44, 0x1d, 0x37, 0x19, 0x76, 0x04, 0x0e,
+	0xbd, 0xc4, 0x9e, 0xe3, 0xdf, 0x94, 0x49, 0x32, 0x65, 0xd0, 0x37, 0x64, 0xb5, 0x2a, 0x61, 0x2d, 0x05, 0xc5, 0xe5, 0x79, 0x3e, 0xcf, 0x5f, 0x77, 0x0a, 0x7c,
+	0x29, 0x34, 0x1a, 0x45, 0x7e, 0x11, 0x68, 0xb4, 0x3a, 0xf6, 0x5b, 0x23, 0xe4, 0x32, 0xa4, 0x11, 0x1a, 0xba, 0xd6, 0x4a, 0x45, 0x42, 0x29, 0xac, 0xb0, 0x17,
+	0x05, 0x1b, 0xee, 0xf6, 0x52, 0x6d, 0x8b, 0xb4, 0x3b, 0x63, 0xe2, 0xca, 0xbf, 0x7e, 0xd3, 0xf7, 0x96, 0x75, 0x67, 0x9d, 0x27, 0x15, 0x39, 0xde, 0x5f, 0x66,
+	0x74, 0x7c, 0x46, 0x01, 0x48, 0xf7, 0x99, 0x33, 0x7d, 0xc6, 0x81, 0xc4, 0x82, 0x09, 0x00, 0x20, 0x3f, 0x5c, 0xe4, 0x51, 0x88, 0x5b, 0xac, 0x31, 0x17, 0x04,
+	0xa4, 0xac, 0xbf, 0x3d, 0xff, 0xad, 0x51, 0x07, 0x0b, 0xc7, 0x26, 0xa7, 0x9f, 0x83, 0x17, 0xd8, 0x2f, 0x6a, 0x47, 0x96, 0x14, 0x47, 0x68, 0xd4, 0xc0, 0xc0,
+	0x3b, 0x87, 0x51, 0x30, 0xe9, 0xfa, 0x21, 0x46, 0x80, 0x1a, 0x5a, 0xef, 0x78, 0xd0, 0x3a, 0xac, 0x73, 0x1e, 0x39, 0xba, 0x82, 0x43, 0x5d, 0xef, 0x15, 0x2c,
+	0x9a, 0xe5, 0xeb, 0x6a, 0xe7, 0x24, 0x12, 0xe6, 0x2a, 0xd2, 0x09, 0xc2, 0x85, 0x69, 0x9d, 0x73, 0x16, 0xb0, 0xad, 0x51, 0xf8, 0x3d, 0x94, 0x6b, 0xb7, 0xb3,
+	0x7f, 0xb4, 0x9e, 0xc1, 0xdc, 0x31, 0x27, 0xa1, 0x2d, 0xfe, 0x30, 0x15, 0x04, 0x20, 0x82, 0xdc, 0xbd, 0x8b, 0xc5, 0xb4, 0xcf, 0x91, 0x85, 0xae, 0x21, 0x5e,
+	0x00, 0x10, 0x04, 0x62, 0x8a, 0xe2, 0x66, 0x74, 0xf8, 0x8d, 0x8b, 0x52, 0x17, 0xd9, 0x1a, 0xbd, 0x06, 0x2d, 0x07, 0x6a, 0xf5, 0x8b, 0xdf, 0x85, 0x2e, 0x36,
+	0xec, 0x15, 0x6f, 0x7e, 0xd2, 0x04, 0x43, 0x6a, 0xd7, 0x60, 0xf5, 0x53, 0x0d, 0x2e, 0x2d, 0xf5, 0x52, 0x4c, 0xcc, 0xe5, 0xf4, 0x47, 0xdd, 0x34, 0xda, 0xc1,
+	0xfc, 0x60, 0x00, 0xaa, 0x68, 0x01, 0x5c, 0x82, 0x4b, 0xf9, 0x57, 0x54, 0x9d, 0xd5, 0x8b, 0xb6, 0x42, 0x77, 0xd4, 0x47, 0x70, 0x23, 0x4c, 0xad, 0xc5, 0x00,
+	0x73, 0x9b, 0xbb, 0x65, 0xa7, 0x46, 0x74, 0xcd, 0x2e, 0x61, 0x0f, 0xac, 0xeb, 0x53, 0x5a, 0x87, 0x70, 0xfc, 0x5d, 0x2e, 0xa1, 0xe3, 0x9a, 0x87, 0x01, 0x0f,
+	0x2e, 0xef, 0x10, 0xe2, 0x82, 0xd8, 0x12, 0xe7, 0xb8, 0x94, 0xa4, 0xdd, 0x5f, 0xea, 0x21, 0x63, 0x26, 0x43, 0xec, 0xc3, 0x54, 0x76, 0xb1, 0xb2, 0x1c, 0x03,
+	0x4c, 0x5c, 0x22, 0xb5, 0x00, 0x7d, 0x77, 0x3a, 0xb6, 0xbf, 0x50, 0xbd, 0xfd, 0x0a, 0x31, 0x2c, 0xdc, 0xab, 0xe2, 0xc0, 0x0b, 0xb6, 0x66, 0xad, 0x9c, 0xca,
+	0x94, 0xed, 0xd8, 0x77, 0x1b, 0xf1, 0x94, 0xdd, 0x65, 0x61, 0xda, 0x7b, 0x04, 0x3c, 0x93, 0xcf, 0x96, 0x74, 0x35, 0x8e, 0x41, 0xe1, 0xa4, 0xbc, 0xf2, 0x4f,
+	0xe9, 0xb8, 0x16, 0x55, 0x05, 0x5a, 0xac, 0x10, 0xd3, 0xdf, 0xea, 0x6a, 0xf8, 0xe0, 0xf3, 0xdf, 0x66, 0x00, 0xab, 0x3d, 0xb9, 0x44, 0x65, 0x34, 0x49, 0x89,
+	0xf2, 0x1d, 0x09, 0xc9, 0xfc, 0xa5, 0x84, 0xa1, 0x03, 0x5b, 0x7a, 0x5c, 0x7e, 0x21, 0xe9, 0xb4, 0x3a, 0x4c, 0x2b, 0x94, 0x64, 0x1d, 0x9b, 0xa5, 0xbf, 0x7e,
+	0x1c, 0x97, 0x7e, 0x3d, 0xbe, 0x84, 0xfc, 0xab, 0x6d, 0x2a, 0x50, 0x23, 0x9e, 0x11, 0x3f, 0xe2, 0xa0, 0x68, 0xe7, 0xd5, 0xba, 0x5e, 0x24, 0x8c, 0x4c, 0x46,
+	0xe6, 0x5b, 0x10, 0xc3, 0x82, 0x32, 0x17, 0x32, 0xdc, 0xec, 0xaa, 0x1e, 0x73, 0xe5, 0x7d, 0xb8, 0x1c, 0x6c, 0x4c, 0x9f, 0x60, 0x7b, 0x66, 0x4c, 0x90, 0x69,
+	0xc4, 0x23, 0x66, 0x67, 0xce, 0x6d, 0x24, 0x1d, 0xcc, 0x8e, 0x78, 0xa1, 0xa7, 0xde, 0x87, 0x81, 0xac, 0x62, 0x54, 0xbc, 0x47, 0x82, 0x3c, 0xad, 0x92, 0x29,
+	0xd9, 0xc0, 0xed, 0x0c, 0x11, 0x0e, 0xc5, 0x75, 0xa4, 0xbd, 0xbf, 0xcb, 0x3a, 0xaf, 0x2b, 0x9f, 0xbe, 0xbb, 0xbc, 0x31, 0x07, 0xa7, 0xbe, 0x6c, 0xa9, 0x4e,
+	0xff, 0x35, 0x80, 0x2f, 0x09, 0x77, 0xe0, 0xc0, 0xdc, 0x9c, 0xc6, 0xa6, 0x63, 0xab, 0x47, 0x74, 0x5f, 0x5c, 0xae, 0x75, 0xbf, 0x42, 0x67, 0x55, 0x89, 0xcf,
+	0xd3, 0x65, 0x8d, 0x5b, 0x6f, 0x5c, 0xf9, 0xd1, 0x78, 0xa2, 0xfd, 0x4f, 0x54, 0x6a, 0x71, 0x0c, 0x58, 0x13, 0xb0, 0x48, 0x0a, 0x7b, 0xcc, 0x84, 0x61, 0xa7,
+	0x7d, 0x39, 0xa2, 0xd1, 0xc0, 0xdb, 0x8e, 0x97, 0x20, 0x86, 0x97, 0x20, 0xda, 0xca, 0x56, 0x78, 0x61, 0xc2, 0x2f, 0x36, 0xdb, 0x95, 0xae, 0x7e, 0x8d, 0x97,
+	0xcb, 0x45, 0x6a, 0x6d, 0x27, 0xaa, 0xab, 0x4e, 0x88, 0x23, 0xb6, 0x6a, 0x8a, 0xca, 0x71, 0xca, 0x39, 0xa2, 0x98, 0x0d, 0x53, 0xa9, 0x38, 0xd5, 0x9c, 0x5d,
+	0x0e, 0x5e, 0xc9, 0xeb, 0x21, 0xab, 0x00, 0xca, 0xff, 0x92, 0x20, 0x9d, 0x65, 0x9d, 0x8d, 0x49, 0x46, 0xbe, 0x51, 0x97, 0xc1, 0x61, 0x02, 0x9e, 0xa8, 0xb9,
+	0x2c, 0x27, 0x7d, 0x73, 0xf9, 0x12, 0x16, 0x45, 0x25, 0xbb, 0xb0, 0x51, 0x14, 0x18, 0x07, 0xab, 0xc7, 0x06, 0xc0, 0xe9, 0x1c, 0xf8, 0x6d, 0xe1, 0x80, 0x21,
+	0x21, 0x68, 0x24, 0xf7, 0x28, 0xb9, 0x07, 0xd4, 0xd7, 0xdf, 0x3e, 0xff, 0xbc, 0xe3, 0xbc, 0x6e, 0x42, 0x76, 0x63, 0xbc, 0x82, 0x0a, 0xf5, 0x99, 0x65, 0x17,
+	0xd2, 0x38, 0xa9, 0xa8, 0x31, 0xce, 0x1f, 0xf7, 0xef, 0x8d, 0x94, 0xae, 0x99, 0x50, 0x30, 0x12, 0xbd, 0x4b, 0x65, 0x56, 0x59, 0xfb, 0x33, 0x7b, 0x99, 0xc7,
+	0xe5, 0x80, 0xe6, 0x92, 0x0e, 0x44, 0x1d, 0x17, 0xc2, 0xd0, 0x78, 0x76, 0x9d, 0x5b, 0x7d, 0x3c, 0xb4, 0xf8, 0xcb, 0x2f, 0x83, 0x23, 0x35, 0x49, 0xc0, 0x78,
+	0x2d, 0x44, 0x05, 0x64, 0x0f, 0xaa, 0x84, 0x9d, 0x3f, 0xac, 0xef, 0x5b, 0x46, 0x44, 0xb8, 0x15, 0xbe, 0x4f, 0xe7, 0x25, 0xb7, 0xa0, 0xc8, 0x0f, 0x70, 0x1a,
+	0xca, 0x7f, 0xce, 0x79, 0x7b, 0xf5, 0x7e, 0x21, 0x35, 0xc7, 0x0e, 0x99, 0xdc, 0x76, 0xe0, 0x36, 0x09, 0x6e, 0x6d, 0x5f, 0x98, 0x5e, 0xb8, 0xa4, 0x88, 0xea,
+	0x0b, 0x4b, 0x21, 0xa2, 0x52, 0x86, 0x95, 0x4e, 0x18, 0xac, 0xa2, 0xaf, 0x29, 0x5b, 0xe7, 0x05, 0xa1, 0xc8, 0xe1, 0x80, 0xfa, 0xb6, 0x5a, 0xed, 0x94, 0x32,
+	0x4f, 0xe9, 0xf5, 0xf0, 0x61, 0x5d, 0x7f, 0xc4, 0xc4, 0xd1, 0x05, 0x54, 0x13, 0xdb};
+
+#if 1
+TEST(DATA_PACKET, ETH_IP6_UDP_GTP_IP4_TCP_TLS)
+{
+	char buffer[256];
+	struct packet handler;
+
+	const char *payload = packet_parse(&handler, (const char *)data10, sizeof(data10));
+	EXPECT_TRUE(payload != nullptr);
+	EXPECT_TRUE((char *)payload - (char *)&data10 == 122);
+	packet_print(&handler);
+
+	/******************************************************
+	 * packet_get_outermost/innermost_layer
+	 ******************************************************/
+
+	// LAYER_TYPE_ETHER
+	const struct layer_record *outer_eth_record = packet_get_outermost_layer(&handler, LAYER_TYPE_ETHER);
+	const struct layer_record *inner_eth_record = packet_get_innermost_layer(&handler, LAYER_TYPE_ETHER);
+
+	EXPECT_TRUE(outer_eth_record != nullptr);
+	EXPECT_TRUE(inner_eth_record != nullptr);
+	EXPECT_TRUE(outer_eth_record == inner_eth_record);
+	EXPECT_TRUE(outer_eth_record->hdr_offset == 0);
+	EXPECT_TRUE(outer_eth_record->hdr_len == 14);
+	EXPECT_TRUE(outer_eth_record->pld_len == 1456);
+
+	// LAYER_TYPE_L2
+	const struct layer_record *outer_l2_record = packet_get_outermost_layer(&handler, LAYER_TYPE_L2);
+	const struct layer_record *inner_l2_record = packet_get_innermost_layer(&handler, LAYER_TYPE_L2);
+
+	EXPECT_TRUE(outer_l2_record != nullptr);
+	EXPECT_TRUE(inner_l2_record != nullptr);
+	EXPECT_TRUE(outer_l2_record == inner_l2_record);
+	EXPECT_TRUE(outer_l2_record == outer_eth_record);
+
+	// LAYER_TYPE_IPV6
+	const struct layer_record *outer_ipv6_record = packet_get_outermost_layer(&handler, LAYER_TYPE_IPV6);
+	const struct layer_record *inner_ipv6_record = packet_get_innermost_layer(&handler, LAYER_TYPE_IPV6);
+
+	EXPECT_TRUE(outer_ipv6_record != nullptr);
+	EXPECT_TRUE(inner_ipv6_record != nullptr);
+	EXPECT_TRUE(outer_ipv6_record == inner_ipv6_record);
+	EXPECT_TRUE(outer_ipv6_record->hdr_offset == 14);
+	EXPECT_TRUE(outer_ipv6_record->hdr_len == 40);
+	EXPECT_TRUE(outer_ipv6_record->pld_len == 1416);
+
+	// LAYER_TYPE_L3
+	const struct layer_record *outer_l3_record = packet_get_outermost_layer(&handler, LAYER_TYPE_L3);
+
+	EXPECT_TRUE(outer_l3_record != nullptr);
+	EXPECT_TRUE(outer_l3_record == outer_ipv6_record);
+
+	// LAYER_TYPE_UDP
+	const struct layer_record *outer_udp_record = packet_get_outermost_layer(&handler, LAYER_TYPE_UDP);
+	const struct layer_record *inner_udp_record = packet_get_innermost_layer(&handler, LAYER_TYPE_UDP);
+
+	EXPECT_TRUE(outer_udp_record != nullptr);
+	EXPECT_TRUE(inner_udp_record != nullptr);
+	EXPECT_TRUE(outer_udp_record == inner_udp_record);
+	EXPECT_TRUE(outer_udp_record->hdr_offset == 54);
+	EXPECT_TRUE(outer_udp_record->hdr_len == 8);
+	EXPECT_TRUE(outer_udp_record->pld_len == 1408);
+
+	// LAYER_TYPE_L4
+	const struct layer_record *outer_l4_record = packet_get_outermost_layer(&handler, LAYER_TYPE_L4);
+
+	EXPECT_TRUE(outer_l4_record != nullptr);
+	EXPECT_TRUE(outer_l4_record == outer_udp_record);
+
+	// LAYER_TYPE_GTPV1_U
+	const struct layer_record *outer_gtp_record = packet_get_outermost_layer(&handler, LAYER_TYPE_GTPV1_U);
+	const struct layer_record *inner_gtp_record = packet_get_innermost_layer(&handler, LAYER_TYPE_GTPV1_U);
+
+	EXPECT_TRUE(outer_gtp_record != nullptr);
+	EXPECT_TRUE(inner_gtp_record != nullptr);
+	EXPECT_TRUE(outer_gtp_record == inner_gtp_record);
+	EXPECT_TRUE(outer_gtp_record->hdr_offset == 62);
+	EXPECT_TRUE(outer_gtp_record->hdr_len == 8);
+	EXPECT_TRUE(outer_gtp_record->pld_len == 1400);
+
+	// LAYER_TYPE_IPV4
+	const struct layer_record *outer_ipv4_record = packet_get_outermost_layer(&handler, LAYER_TYPE_IPV4);
+	const struct layer_record *inner_ipv4_record = packet_get_innermost_layer(&handler, LAYER_TYPE_IPV4);
+
+	EXPECT_TRUE(outer_ipv4_record != nullptr);
+	EXPECT_TRUE(inner_ipv4_record != nullptr);
+	EXPECT_TRUE(outer_ipv4_record == inner_ipv4_record);
+	EXPECT_TRUE(outer_ipv4_record->hdr_offset == 70);
+	EXPECT_TRUE(outer_ipv4_record->hdr_len == 20);
+	EXPECT_TRUE(outer_ipv4_record->pld_len == 1380);
+
+	// LAYER_TYPE_L3
+	const struct layer_record *inner_l3_record = packet_get_innermost_layer(&handler, LAYER_TYPE_L3);
+
+	EXPECT_TRUE(inner_l3_record != nullptr);
+	EXPECT_TRUE(inner_l3_record == outer_ipv4_record);
+
+	// LAYER_TYPE_TCP
+	const struct layer_record *outer_tcp_record = packet_get_outermost_layer(&handler, LAYER_TYPE_TCP);
+	const struct layer_record *inner_tcp_record = packet_get_innermost_layer(&handler, LAYER_TYPE_TCP);
+
+	EXPECT_TRUE(outer_tcp_record != nullptr);
+	EXPECT_TRUE(inner_tcp_record != nullptr);
+	EXPECT_TRUE(outer_tcp_record == inner_tcp_record);
+	EXPECT_TRUE(outer_tcp_record->hdr_offset == 90);
+	EXPECT_TRUE(outer_tcp_record->hdr_len == 32);
+	EXPECT_TRUE(outer_tcp_record->pld_len == 1348);
+
+	// LAYER_TYPE_L4
+	const struct layer_record *inner_l4_record = packet_get_innermost_layer(&handler, LAYER_TYPE_L4);
+
+	EXPECT_TRUE(inner_l4_record != nullptr);
+	EXPECT_TRUE(inner_l4_record == outer_tcp_record);
+
+	/******************************************************
+	 * packet_get_outermost/innermost_tuple2
+	 ******************************************************/
+
+	struct tuple2 outer_tuple2;
+	struct tuple2 inner_tuple2;
+	EXPECT_TRUE(packet_get_outermost_tuple2(&handler, &outer_tuple2) == 0);
+	EXPECT_TRUE(packet_get_innermost_tuple2(&handler, &inner_tuple2) == 0);
+	memset(buffer, 0, sizeof(buffer));
+	tuple2_tostring(&outer_tuple2, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "2409:8034:4025::50:a31 -> 2409:8034:4040:5301::204");
+	memset(buffer, 0, sizeof(buffer));
+	tuple2_tostring(&inner_tuple2, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "10.49.115.138 -> 121.196.250.66");
+
+	/******************************************************
+	 * packet_get_outermost/innermost_tuple4
+	 ******************************************************/
+
+	struct tuple4 outer_tuple4;
+	struct tuple4 inner_tuple4;
+	EXPECT_TRUE(packet_get_outermost_tuple4(&handler, &outer_tuple4) == 0);
+	EXPECT_TRUE(packet_get_innermost_tuple4(&handler, &inner_tuple4) == 0);
+	memset(buffer, 0, sizeof(buffer));
+	tuple4_tostring(&outer_tuple4, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "2409:8034:4025::50:a31:2152 -> 2409:8034:4040:5301::204:2152");
+	memset(buffer, 0, sizeof(buffer));
+	tuple4_tostring(&inner_tuple4, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "10.49.115.138:50081 -> 121.196.250.66:443");
+
+	/******************************************************
+	 * packet_get_outermost/innermost_tuple6
+	 ******************************************************/
+
+	struct tuple6 outer_tuple6;
+	struct tuple6 inner_tuple6;
+	EXPECT_TRUE(packet_get_outermost_tuple6(&handler, &outer_tuple6) == 0);
+	EXPECT_TRUE(packet_get_innermost_tuple6(&handler, &inner_tuple6) == 0);
+	memset(buffer, 0, sizeof(buffer));
+	tuple6_tostring(&outer_tuple6, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "2409:8034:4025::50:a31:2152 -> 2409:8034:4040:5301::204:2152, proto: 17, zone: 0");
+	memset(buffer, 0, sizeof(buffer));
+	tuple6_tostring(&inner_tuple6, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "10.49.115.138:50081 -> 121.196.250.66:443, proto: 6, zone: 0");
+}
+#endif
+
+/******************************************************************************
+ * Pcap file: 11-ETH_IP4_UDP_VXLAN_ETH_IP4_UDP_DNS.pcap
+ * [Protocols in frame: eth:ethertype:ip:udp:vxlan:eth:ethertype:ip:udp:dns]
+ ******************************************************************************
+ *
+ * Frame 1: 124 bytes on wire (992 bits), 124 bytes captured (992 bits)
+ * Ethernet II, Src: zte_6c:fa:43 (00:1e:73:6c:fa:43), Dst: Shanghai_0d:0a (e4:95:6e:20:0d:0a)
+ * 	Destination: Shanghai_0d:0a (e4:95:6e:20:0d:0a)
+ * 	Source: zte_6c:fa:43 (00:1e:73:6c:fa:43)
+ * 	Type: IPv4 (0x0800)
+ * Internet Protocol Version 4, Src: 10.1.1.1, Dst: 192.168.1.10
+ * 	0100 .... = Version: 4
+ * 	.... 0101 = Header Length: 20 bytes (5)
+ * 	Differentiated Services Field: 0x00 (DSCP: CS0, ECN: Not-ECT)
+ * 	Total Length: 110
+ * 	Identification: 0x0000 (0)
+ * 	000. .... = Flags: 0x0
+ * 	...0 0000 0000 0000 = Fragment Offset: 0
+ * 	Time to Live: 254
+ * 	Protocol: UDP (17)
+ * 	Header Checksum: 0xefca [validation disabled]
+ * 	[Header checksum status: Unverified]
+ * 	Source Address: 10.1.1.1
+ * 	Destination Address: 192.168.1.10
+ * User Datagram Protocol, Src Port: 50709, Dst Port: 4789
+ * 	Source Port: 50709
+ * 	Destination Port: 4789
+ * 	Length: 90
+ * 	Checksum: 0x0000 [zero-value ignored]
+ * 	[Stream index: 0]
+ * 	[Timestamps]
+ * 	UDP payload (82 bytes)
+ * Virtual eXtensible Local Area Network
+ * 	Flags: 0x0800, VXLAN Network ID (VNI)
+ * 	Group Policy ID: 0
+ * 	VXLAN Network Identifier (VNI): 458755
+ * 	Reserved: 0
+ * Ethernet II, Src: WistronI_18:18:41 (3c:97:0e:18:18:41), Dst: DawningI_13:70:7a (e8:61:1f:13:70:7a)
+ * 	Destination: DawningI_13:70:7a (e8:61:1f:13:70:7a)
+ * 	Source: WistronI_18:18:41 (3c:97:0e:18:18:41)
+ * 	Type: IPv4 (0x0800)
+ * Internet Protocol Version 4, Src: 192.168.11.193, Dst: 114.114.114.114
+ * 	0100 .... = Version: 4
+ * 	.... 0101 = Header Length: 20 bytes (5)
+ * 	Differentiated Services Field: 0x00 (DSCP: CS0, ECN: Not-ECT)
+ * 	Total Length: 60
+ * 	Identification: 0x0cb6 (3254)
+ * 	000. .... = Flags: 0x0
+ * 	...0 0000 0000 0000 = Fragment Offset: 0
+ * 	Time to Live: 64
+ * 	Protocol: UDP (17)
+ * 	Header Checksum: 0xbcad [validation disabled]
+ * 	[Header checksum status: Unverified]
+ * 	Source Address: 192.168.11.193
+ * 	Destination Address: 114.114.114.114
+ * User Datagram Protocol, Src Port: 65290, Dst Port: 53
+ * 	Source Port: 65290
+ * 	Destination Port: 53
+ * 	Length: 40
+ * 	Checksum: 0x39e4 [unverified]
+ * 	[Checksum Status: Unverified]
+ * 	[Stream index: 1]
+ * 	[Timestamps]
+ * 	UDP payload (32 bytes)
+ * Domain Name System (query)
+ */
+
+unsigned char data11[] = {
+	0xe4, 0x95, 0x6e, 0x20, 0x0d, 0x0a, 0x00, 0x1e, 0x73, 0x6c, 0xfa, 0x43, 0x08, 0x00, 0x45, 0x00, 0x00, 0x6e, 0x00, 0x00, 0x00, 0x00, 0xfe, 0x11, 0xef, 0xca,
+	0x0a, 0x01, 0x01, 0x01, 0xc0, 0xa8, 0x01, 0x0a, 0xc6, 0x15, 0x12, 0xb5, 0x00, 0x5a, 0x00, 0x00, 0x08, 0x00, 0x00, 0x00, 0x07, 0x00, 0x03, 0x00, 0xe8, 0x61,
+	0x1f, 0x13, 0x70, 0x7a, 0x3c, 0x97, 0x0e, 0x18, 0x18, 0x41, 0x08, 0x00, 0x45, 0x00, 0x00, 0x3c, 0x0c, 0xb6, 0x00, 0x00, 0x40, 0x11, 0xbc, 0xad, 0xc0, 0xa8,
+	0x0b, 0xc1, 0x72, 0x72, 0x72, 0x72, 0xff, 0x0a, 0x00, 0x35, 0x00, 0x28, 0x39, 0xe4, 0x86, 0x84, 0x01, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x03, 0x77, 0x77, 0x77, 0x06, 0x67, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x03, 0x63, 0x6f, 0x6d, 0x00, 0x00, 0x01, 0x00, 0x01};
+
+#if 1
+TEST(DATA_PACKET, ETH_IP4_UDP_VXLAN_ETH_IP4_UDP_DNS)
+{
+	char buffer[256];
+	struct packet handler;
+
+	const char *payload = packet_parse(&handler, (const char *)data11, sizeof(data11));
+	EXPECT_TRUE(payload != nullptr);
+	EXPECT_TRUE((char *)payload - (char *)&data11 == 92);
+	packet_print(&handler);
+
+	/******************************************************
+	 * packet_get_outermost/innermost_layer
+	 ******************************************************/
+
+	// LAYER_TYPE_ETHER
+	const struct layer_record *outer_eth_record = packet_get_outermost_layer(&handler, LAYER_TYPE_ETHER);
+
+	EXPECT_TRUE(outer_eth_record != nullptr);
+	EXPECT_TRUE(outer_eth_record->hdr_offset == 0);
+	EXPECT_TRUE(outer_eth_record->hdr_len == 14);
+	EXPECT_TRUE(outer_eth_record->pld_len == 110);
+
+	// LAYER_TYPE_L2
+	const struct layer_record *outer_l2_record = packet_get_outermost_layer(&handler, LAYER_TYPE_L2);
+
+	EXPECT_TRUE(outer_l2_record != nullptr);
+	EXPECT_TRUE(outer_l2_record == outer_eth_record);
+
+	// LAYER_TYPE_IPV4
+	const struct layer_record *outer_ipv4_record = packet_get_outermost_layer(&handler, LAYER_TYPE_IPV4);
+
+	EXPECT_TRUE(outer_ipv4_record != nullptr);
+	EXPECT_TRUE(outer_ipv4_record->hdr_offset == 14);
+	EXPECT_TRUE(outer_ipv4_record->hdr_len == 20);
+	EXPECT_TRUE(outer_ipv4_record->pld_len == 90);
+
+	// LAYER_TYPE_L3
+	const struct layer_record *outer_l3_record = packet_get_outermost_layer(&handler, LAYER_TYPE_L3);
+
+	EXPECT_TRUE(outer_l3_record != nullptr);
+	EXPECT_TRUE(outer_l3_record == outer_ipv4_record);
+
+	// LAYER_TYPE_UDP
+	const struct layer_record *outer_udp_record = packet_get_outermost_layer(&handler, LAYER_TYPE_UDP);
+
+	EXPECT_TRUE(outer_udp_record != nullptr);
+	EXPECT_TRUE(outer_udp_record->hdr_offset == 34);
+	EXPECT_TRUE(outer_udp_record->hdr_len == 8);
+	EXPECT_TRUE(outer_udp_record->pld_len == 82);
+
+	// LAYER_TYPE_L4
+	const struct layer_record *outer_l4_record = packet_get_outermost_layer(&handler, LAYER_TYPE_L4);
+
+	EXPECT_TRUE(outer_l4_record != nullptr);
+	EXPECT_TRUE(outer_l4_record == outer_udp_record);
+
+	// LAYER_TYPE_VXLAN
+	const struct layer_record *outer_g_vlan_record = packet_get_outermost_layer(&handler, LAYER_TYPE_VXLAN);
+	const struct layer_record *inner_g_vlan_record = packet_get_innermost_layer(&handler, LAYER_TYPE_VXLAN);
+
+	EXPECT_TRUE(outer_g_vlan_record != nullptr);
+	EXPECT_TRUE(inner_g_vlan_record != nullptr);
+	EXPECT_TRUE(outer_g_vlan_record == inner_g_vlan_record);
+
+	EXPECT_TRUE(outer_g_vlan_record->hdr_offset == 42);
+	EXPECT_TRUE(outer_g_vlan_record->hdr_len == 8);
+	EXPECT_TRUE(outer_g_vlan_record->pld_len == 74);
+
+	// LAYER_TYPE_ETHER
+	const struct layer_record *inner_eth_record = packet_get_innermost_layer(&handler, LAYER_TYPE_ETHER);
+
+	EXPECT_TRUE(inner_eth_record != nullptr);
+	EXPECT_TRUE(inner_eth_record->hdr_offset == 50);
+	EXPECT_TRUE(inner_eth_record->hdr_len == 14);
+	EXPECT_TRUE(inner_eth_record->pld_len == 60);
+
+	// LAYER_TYPE_L2
+	const struct layer_record *inner_l2_record = packet_get_innermost_layer(&handler, LAYER_TYPE_L2);
+
+	EXPECT_TRUE(inner_l2_record != nullptr);
+	EXPECT_TRUE(inner_l2_record == inner_eth_record);
+
+	// LAYER_TYPE_IPV4
+	const struct layer_record *inner_ipv4_record = packet_get_innermost_layer(&handler, LAYER_TYPE_IPV4);
+
+	EXPECT_TRUE(inner_ipv4_record != nullptr);
+	EXPECT_TRUE(inner_ipv4_record->hdr_offset == 64);
+	EXPECT_TRUE(inner_ipv4_record->hdr_len == 20);
+	EXPECT_TRUE(inner_ipv4_record->pld_len == 40);
+
+	// LAYER_TYPE_L3
+	const struct layer_record *inner_l3_record = packet_get_innermost_layer(&handler, LAYER_TYPE_L3);
+
+	EXPECT_TRUE(inner_l3_record != nullptr);
+	EXPECT_TRUE(inner_l3_record == inner_ipv4_record);
+
+	// LAYER_TYPE_UDP
+	const struct layer_record *inner_udp_record = packet_get_innermost_layer(&handler, LAYER_TYPE_UDP);
+
+	EXPECT_TRUE(inner_udp_record != nullptr);
+	EXPECT_TRUE(inner_udp_record->hdr_offset == 84);
+	EXPECT_TRUE(inner_udp_record->hdr_len == 8);
+	EXPECT_TRUE(inner_udp_record->pld_len == 32);
+
+	// LAYER_TYPE_L4
+	const struct layer_record *inner_l4_record = packet_get_innermost_layer(&handler, LAYER_TYPE_L4);
+
+	EXPECT_TRUE(inner_l4_record != nullptr);
+	EXPECT_TRUE(inner_l4_record == inner_udp_record);
+
+	/******************************************************
+	 * packet_get_outermost/innermost_tuple2
+	 ******************************************************/
+
+	struct tuple2 outer_tuple2;
+	struct tuple2 inner_tuple2;
+	EXPECT_TRUE(packet_get_outermost_tuple2(&handler, &outer_tuple2) == 0);
+	EXPECT_TRUE(packet_get_innermost_tuple2(&handler, &inner_tuple2) == 0);
+	memset(buffer, 0, sizeof(buffer));
+	tuple2_tostring(&outer_tuple2, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "10.1.1.1 -> 192.168.1.10");
+	memset(buffer, 0, sizeof(buffer));
+	tuple2_tostring(&inner_tuple2, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "192.168.11.193 -> 114.114.114.114");
+
+	/******************************************************
+	 * packet_get_outermost/innermost_tuple4
+	 ******************************************************/
+
+	struct tuple4 outer_tuple4;
+	struct tuple4 inner_tuple4;
+	EXPECT_TRUE(packet_get_outermost_tuple4(&handler, &outer_tuple4) == 0);
+	EXPECT_TRUE(packet_get_innermost_tuple4(&handler, &inner_tuple4) == 0);
+	memset(buffer, 0, sizeof(buffer));
+	tuple4_tostring(&outer_tuple4, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "10.1.1.1:50709 -> 192.168.1.10:4789");
+	memset(buffer, 0, sizeof(buffer));
+	tuple4_tostring(&inner_tuple4, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "192.168.11.193:65290 -> 114.114.114.114:53");
+
+	/******************************************************
+	 * packet_get_outermost/innermost_tuple6
+	 ******************************************************/
+
+	struct tuple6 outer_tuple6;
+	struct tuple6 inner_tuple6;
+	EXPECT_TRUE(packet_get_outermost_tuple6(&handler, &outer_tuple6) == 0);
+	EXPECT_TRUE(packet_get_innermost_tuple6(&handler, &inner_tuple6) == 0);
+	memset(buffer, 0, sizeof(buffer));
+	tuple6_tostring(&outer_tuple6, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "10.1.1.1:50709 -> 192.168.1.10:4789, proto: 17, zone: 0");
+	memset(buffer, 0, sizeof(buffer));
+	tuple6_tostring(&inner_tuple6, buffer, sizeof(buffer));
+	EXPECT_STREQ(buffer, "192.168.11.193:65290 -> 114.114.114.114:53, proto: 17, zone: 0");
+}
+#endif
+
+/******************************************************************************
+ * Pcap file: 12-ETH_MPLS_MPLS_PWETHCW_ETH_ARP.pcap
+ * [Protocols in frame: eth:ethertype:mpls:pwethheuristic:pwethcw:eth:ethertype:arp]
+ ******************************************************************************
+ *
+ * Frame 1: 90 bytes on wire (720 bits), 90 bytes captured (720 bits)
+ * Ethernet II, Src: cc:01:0d:5c:00:10 (cc:01:0d:5c:00:10), Dst: cc:00:0d:5c:00:10 (cc:00:0d:5c:00:10)
+ * 	Destination: cc:00:0d:5c:00:10 (cc:00:0d:5c:00:10)
+ * 	Source: cc:01:0d:5c:00:10 (cc:01:0d:5c:00:10)
+ * 	Type: MPLS label switched packet (0x8847)
+ * MultiProtocol Label Switching Header, Label: 19, Exp: 0, S: 0, TTL: 254
+ * 	0000 0000 0000 0001 0011 .... .... .... = MPLS Label: 19 (0x00013)
+ * 	.... .... .... .... .... 000. .... .... = MPLS Experimental Bits: 0
+ * 	.... .... .... .... .... ...0 .... .... = MPLS Bottom Of Label Stack: 0
+ * 	.... .... .... .... .... .... 1111 1110 = MPLS TTL: 254
+ * MultiProtocol Label Switching Header, Label: 16, Exp: 0, S: 1, TTL: 255
+ * 	0000 0000 0000 0001 0000 .... .... .... = MPLS Label: 16 (0x00010)
+ * 	.... .... .... .... .... 000. .... .... = MPLS Experimental Bits: 0
+ * 	.... .... .... .... .... ...1 .... .... = MPLS Bottom Of Label Stack: 1
+ * 	.... .... .... .... .... .... 1111 1111 = MPLS TTL: 255
+ * PW Ethernet Control Word
+ * 	Sequence Number: 0
+ * Ethernet II, Src: Private_66:68:00 (00:50:79:66:68:00), Dst: Broadcast (ff:ff:ff:ff:ff:ff)
+ * 	Destination: Broadcast (ff:ff:ff:ff:ff:ff)
+ * 	Source: Private_66:68:00 (00:50:79:66:68:00)
+ * 	Type: ARP (0x0806)
+ * 	Trailer: 00000000000000000000000000000000000000000000
+ * Address Resolution Protocol (request)
+ */
+
+unsigned char data12[] = {
+	0xcc, 0x00, 0x0d, 0x5c, 0x00, 0x10, 0xcc, 0x01, 0x0d, 0x5c, 0x00, 0x10, 0x88, 0x47, 0x00, 0x01, 0x30, 0xfe, 0x00, 0x01, 0x01, 0xff, 0x00, 0x00, 0x00, 0x00,
+	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x50, 0x79, 0x66, 0x68, 0x00, 0x08, 0x06, 0x00, 0x01, 0x08, 0x00, 0x06, 0x04, 0x00, 0x01, 0x00, 0x50, 0x79, 0x66,
+	0x68, 0x00, 0xc0, 0xa8, 0x00, 0x0a, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0xa8, 0x00, 0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
+
+#if 1
+TEST(DATA_PACKET, ETH_MPLS_MPLS_PWETHCW_ETH_ARP)
+{
+	struct packet handler;
+
+	const char *payload = packet_parse(&handler, (const char *)data12, sizeof(data12));
+	EXPECT_TRUE(payload != nullptr);
+	EXPECT_TRUE((char *)payload - (char *)&data12 == 40);
+	packet_print(&handler);
+
+	/******************************************************
+	 * packet_get_outermost/innermost_layer
+	 ******************************************************/
+
+	// LAYER_TYPE_ETHER
+	const struct layer_record *outer_eth_record = packet_get_outermost_layer(&handler, LAYER_TYPE_ETHER);
+
+	EXPECT_TRUE(outer_eth_record != nullptr);
+	EXPECT_TRUE(outer_eth_record->hdr_offset == 0);
+	EXPECT_TRUE(outer_eth_record->hdr_len == 14);
+	EXPECT_TRUE(outer_eth_record->pld_len == 76);
+
+	// LAYER_TYPE_L2
+	const struct layer_record *outer_l2_record = packet_get_outermost_layer(&handler, LAYER_TYPE_L2);
+
+	EXPECT_TRUE(outer_l2_record != nullptr);
+	EXPECT_TRUE(outer_l2_record == outer_eth_record);
+
+	// LAYER_TYPE_MPLS
+	const struct layer_record *outer_mpls_record = packet_get_outermost_layer(&handler, LAYER_TYPE_MPLS);
+
+	EXPECT_TRUE(outer_mpls_record != nullptr);
+	EXPECT_TRUE(outer_mpls_record->hdr_offset == 14);
+	EXPECT_TRUE(outer_mpls_record->hdr_len == 4);
+	EXPECT_TRUE(outer_mpls_record->pld_len == 72);
+
+	// LAYER_TYPE_L2_TUN
+	const struct layer_record *outer_l2_tun_record = packet_get_outermost_layer(&handler, LAYER_TYPE_L2_TUN);
+
+	EXPECT_TRUE(outer_l2_tun_record != nullptr);
+	EXPECT_TRUE(outer_l2_tun_record == outer_mpls_record);
+
+	// LAYER_TYPE_MPLS
+	const struct layer_record *inner_mpls_record = packet_get_innermost_layer(&handler, LAYER_TYPE_MPLS);
+
+	EXPECT_TRUE(inner_mpls_record != nullptr);
+	EXPECT_TRUE(inner_mpls_record->hdr_offset == 18);
+	EXPECT_TRUE(inner_mpls_record->hdr_len == 4 + 4); // MPLS + PWETH
+	EXPECT_TRUE(inner_mpls_record->pld_len == 64);
+
+	// LAYER_TYPE_L2_TUN
+	const struct layer_record *inner_l2_tun_record = packet_get_innermost_layer(&handler, LAYER_TYPE_L2_TUN);
+
+	EXPECT_TRUE(inner_l2_tun_record != nullptr);
+	EXPECT_TRUE(inner_l2_tun_record == inner_mpls_record);
+
+	// LAYER_TYPE_ETHER
+	const struct layer_record *inner_eth_record = packet_get_innermost_layer(&handler, LAYER_TYPE_ETHER);
+
+	EXPECT_TRUE(inner_eth_record != nullptr);
+	EXPECT_TRUE(inner_eth_record->hdr_offset == 26);
+	EXPECT_TRUE(inner_eth_record->hdr_len == 14);
+	EXPECT_TRUE(inner_eth_record->pld_len == 50);
+
+	// LAYER_TYPE_L2
+	const struct layer_record *inner_l2_record = packet_get_innermost_layer(&handler, LAYER_TYPE_L2);
+
+	EXPECT_TRUE(inner_l2_record != nullptr);
+	EXPECT_TRUE(inner_l2_record == inner_eth_record);
+
+	/******************************************************
+	 * packet_get_outermost/innermost_tuple2
+	 ******************************************************/
+
+	struct tuple2 outer_tuple2;
+	struct tuple2 inner_tuple2;
+	EXPECT_TRUE(packet_get_outermost_tuple2(&handler, &outer_tuple2) == -1);
+	EXPECT_TRUE(packet_get_innermost_tuple2(&handler, &inner_tuple2) == -1);
+
+	/******************************************************
+	 * packet_get_outermost/innermost_tuple4
+	 ******************************************************/
+
+	struct tuple4 outer_tuple4;
+	struct tuple4 inner_tuple4;
+	EXPECT_TRUE(packet_get_outermost_tuple4(&handler, &outer_tuple4) == -1);
+	EXPECT_TRUE(packet_get_innermost_tuple4(&handler, &inner_tuple4) == -1);
+
+	/******************************************************
+	 * packet_get_outermost/innermost_tuple6
+	 ******************************************************/
+
+	struct tuple6 outer_tuple6;
+	struct tuple6 inner_tuple6;
+	EXPECT_TRUE(packet_get_outermost_tuple6(&handler, &outer_tuple6) == -1);
+	EXPECT_TRUE(packet_get_innermost_tuple6(&handler, &inner_tuple6) == -1);
+}
+#endif
+
+#if 1
+TEST(DATA_PACKET, HASH_VALUE)
+{
+	struct packet handler;
+
+	const char *payload = packet_parse(&handler, (const char *)data4, sizeof(data4));
+	EXPECT_TRUE(payload != nullptr);
+	EXPECT_TRUE((char *)payload - (char *)&data4 == 106);
+	packet_print(&handler);
+
+	// buffer: "2001:da8:200:900e:200:5efe:d24d:58a3 0 2600:140e:6::1702:1058 0"
+	// buffer: "210.77.88.163 0 59.66.4.50 0"
+
+	EXPECT_TRUE(packet_get_hash(&handler, LDBC_METHOD_HASH_INT_IP, 1) == packet_get_hash(&handler, LDBC_METHOD_HASH_EXT_IP, 0));
+	EXPECT_TRUE(packet_get_hash(&handler, LDBC_METHOD_HASH_EXT_IP, 1) == packet_get_hash(&handler, LDBC_METHOD_HASH_INT_IP, 0));
+
+	EXPECT_TRUE(packet_get_hash(&handler, LDBC_METHOD_HASH_INT_IP_AND_EXT_IP, 1) == packet_get_hash(&handler, LDBC_METHOD_HASH_INT_IP_AND_EXT_IP, 0));
+	EXPECT_TRUE(packet_get_hash(&handler, LDBC_METHOD_HASH_INNERMOST_INT_IP, 1) == packet_get_hash(&handler, LDBC_METHOD_HASH_INNERMOST_EXT_IP, 0));
+}
+#endif
+
+int main(int argc, char **argv)
+{
+	::testing::InitGoogleTest(&argc, argv);
+	return RUN_ALL_TESTS();
+}
diff --git a/src/packet/packet.cpp b/src/packet/packet.cpp
new file mode 100644
index 0000000..6bbda4a
--- /dev/null
+++ b/src/packet/packet.cpp
@@ -0,0 +1,1474 @@
+#include <string.h>
+#include <stdlib.h>
+#include <netinet/ip.h>
+#include <netinet/ip6.h>
+#define __FAVOR_BSD 1
+#include <netinet/tcp.h>
+#include <netinet/udp.h>
+#include <netinet/ether.h>
+#include <linux/ppp_defs.h>
+
+#include "uthash.h"
+#include "packet.h"
+
+#define likely(expr) __builtin_expect((expr), 1)
+#define unlikely(expr) __builtin_expect((expr), 0)
+
+#define LOG_PACKET "PACKET"
+#define PACKET_LOG_DATA_INSUFFICIENCY(type)                        \
+    {                                                              \
+        PACKET_LOG_ERROR("%s: layer: %s, data insufficiency",      \
+                         LOG_PACKET, layer_type_tostring((type))); \
+    }
+
+#define PACKET_LOG_UNSUPPORT_PROTO(tag, next_proto)         \
+    {                                                       \
+        PACKET_LOG_ERROR("%s: %s: unsupport next proto %d", \
+                         LOG_PACKET, (tag), (next_proto));  \
+    }
+
+#define PACKET_LOG_UNSUPPORT_ETHPROTO(tag, next_proto)                                    \
+    {                                                                                     \
+        PACKET_LOG_ERROR("%s: %s: unsupport next proto %d: %s",                           \
+                         LOG_PACKET, (tag), (next_proto), ethproto_tostring(next_proto)); \
+    }
+
+#define PACKET_LOG_UNSUPPORT_IPPROTO(tag, next_proto)                                    \
+    {                                                                                    \
+        PACKET_LOG_ERROR("%s: %s: unsupport next proto %d: %s",                          \
+                         LOG_PACKET, (tag), (next_proto), ipproto_tostring(next_proto)); \
+    }
+
+/******************************************************************************
+ * Static API
+ ******************************************************************************/
+
+static const char *ethproto_tostring(uint16_t proto);
+static const char *ipproto_tostring(uint16_t proto);
+static inline const char *ldbc_method_tostring(enum ldbc_method method);
+static inline const char *layer_type_tostring(enum layer_type type);
+
+static inline void set_tuple2(const char *data, enum layer_type type, struct tuple2 *tuple);
+static inline void set_tuple4(const char *data, enum layer_type type, struct tuple4 *tuple);
+static inline void set_tuple6(const char *data, enum layer_type type, struct tuple6 *tuple, uint64_t zone_id);
+
+static inline struct layer_record *get_free_layer(struct packet *handler);
+
+static inline uint16_t get_gtp_hdr_len(const char *data, uint16_t len);
+static inline uint16_t get_gre_hdr_len(const char *data, uint16_t len);
+
+// 数据链路层
+static inline const char *parse_ether(struct packet *handler, const char *data, uint16_t len);
+static inline const char *parse_ppp(struct packet *handler, const char *data, uint16_t len);
+// 数据链路层 -- 隧道
+static inline const char *parse_vlan(struct packet *handler, const char *data, uint16_t len);
+static inline const char *parse_pppoe_ses(struct packet *handler, const char *data, uint16_t len);
+static inline const char *parse_mpls(struct packet *handler, const char *data, uint16_t len);
+// 网络层
+static inline const char *parse_ipv4(struct packet *handler, const char *data, uint16_t len);
+static inline const char *parse_ipv6(struct packet *handler, const char *data, uint16_t len);
+// 网络层 -- 隧道
+static inline const char *parse_gre(struct packet *handler, const char *data, uint16_t len);
+// 传输层
+static inline const char *parse_udp(struct packet *handler, const char *data, uint16_t len);
+static inline const char *parse_tcp(struct packet *handler, const char *data, uint16_t len);
+// 传输层 -- 隧道
+static inline const char *parse_vxlan(struct packet *handler, const char *data, uint16_t len);
+static inline const char *parse_gtpv1_u(struct packet *handler, const char *data, uint16_t len);
+// L3/L4
+static inline const char *parse_l3(struct packet *handler, uint16_t next_proto, const char *data, uint16_t len);
+static inline const char *parse_l4(struct packet *handler, uint8_t next_proto, const char *data, uint16_t len);
+
+/******************************************************************************
+ * Private API -- Utils
+ ******************************************************************************/
+
+static const char *ethproto_tostring(uint16_t proto)
+{
+    switch (proto)
+    {
+    case ETH_P_LOOP:
+        return "LOOP";
+    case ETH_P_PUP:
+        return "PUP";
+    case ETH_P_PUPAT:
+        return "PUPAT";
+    case ETH_P_IP:
+        return "IP";
+    case ETH_P_X25:
+        return "X25";
+    case ETH_P_ARP:
+        return "ARP";
+    case ETH_P_BPQ:
+        return "BPQ";
+    case ETH_P_IEEEPUP:
+        return "IEEEPUP";
+    case ETH_P_IEEEPUPAT:
+        return "IEEEPUPAT";
+    case ETH_P_DEC:
+        return "DEC";
+    case ETH_P_DNA_DL:
+        return "DNA_DL";
+    case ETH_P_DNA_RC:
+        return "DNA_RC";
+    case ETH_P_DNA_RT:
+        return "DNA_RT";
+    case ETH_P_LAT:
+        return "LAT";
+    case ETH_P_DIAG:
+        return "DIAG";
+    case ETH_P_CUST:
+        return "CUST";
+    case ETH_P_SCA:
+        return "SCA";
+    case ETH_P_TEB:
+        return "TEB";
+    case ETH_P_RARP:
+        return "RARP";
+    case ETH_P_ATALK:
+        return "ATALK";
+    case ETH_P_AARP:
+        return "AARP";
+    case ETH_P_8021Q:
+        return "8021Q";
+    case ETH_P_IPX:
+        return "IPX";
+    case ETH_P_IPV6:
+        return "IPV6";
+    case ETH_P_PAUSE:
+        return "PAUSE";
+    case ETH_P_SLOW:
+        return "SLOW";
+    case ETH_P_WCCP:
+        return "WCCP";
+    case ETH_P_PPP_DISC:
+        return "PPP_DISC";
+    case ETH_P_PPP_SES:
+        return "PPP_SES";
+    case ETH_P_MPLS_UC:
+        return "MPLS_UC";
+    case ETH_P_MPLS_MC:
+        return "MPLS_MC";
+    case ETH_P_ATMMPOA:
+        return "ATMMPOA";
+    case ETH_P_LINK_CTL:
+        return "LINK_CTL";
+    case ETH_P_ATMFATE:
+        return "ATMFATE";
+    case ETH_P_PAE:
+        return "PAE";
+    case ETH_P_AOE:
+        return "AOE";
+    case ETH_P_8021AD:
+        return "8021AD";
+    case ETH_P_802_EX1:
+        return "802_EX1";
+    case ETH_P_TIPC:
+        return "TIPC";
+    case ETH_P_8021AH:
+        return "8021AH";
+    case ETH_P_1588:
+        return "1588";
+    case ETH_P_FCOE:
+        return "FCOE";
+    case ETH_P_TDLS:
+        return "TDLS";
+    case ETH_P_FIP:
+        return "FIP";
+    case ETH_P_QINQ1:
+        return "QINQ1";
+    case ETH_P_QINQ2:
+        return "QINQ2";
+    case ETH_P_QINQ3:
+        return "QINQ3";
+    case ETH_P_EDSA:
+        return "EDSA";
+    case ETH_P_AF_IUCV:
+        return "AF_IUCV";
+    default:
+        return "UNKNOWN";
+    }
+}
+
+static const char *ipproto_tostring(uint16_t proto)
+{
+    switch (proto)
+    {
+    case IPPROTO_IP:
+        return "IP";
+    case IPPROTO_ICMP:
+        return "ICMP";
+    case IPPROTO_IGMP:
+        return "IGMP";
+    case IPPROTO_IPIP:
+        return "IPIP";
+    case IPPROTO_TCP:
+        return "TCP";
+    case IPPROTO_EGP:
+        return "EGP";
+    case IPPROTO_PUP:
+        return "PUP";
+    case IPPROTO_UDP:
+        return "UDP";
+    case IPPROTO_IDP:
+        return "IDP";
+    case IPPROTO_TP:
+        return "TP";
+    case IPPROTO_DCCP:
+        return "DCCP";
+    case IPPROTO_IPV6:
+        return "IPV6";
+    case IPPROTO_ROUTING:
+        return "ROUTING";
+    case IPPROTO_FRAGMENT:
+        return "FRAGMENT";
+    case IPPROTO_RSVP:
+        return "RSVP";
+    case IPPROTO_GRE:
+        return "GRE";
+    case IPPROTO_ESP:
+        return "ESP";
+    case IPPROTO_AH:
+        return "AH";
+    case IPPROTO_ICMPV6:
+        return "ICMPV6";
+    case IPPROTO_NONE:
+        return "NONE";
+    case IPPROTO_DSTOPTS:
+        return "DSTOPTS";
+    case IPPROTO_MTP:
+        return "MTP";
+    case IPPROTO_ENCAP:
+        return "ENCAP";
+    case IPPROTO_PIM:
+        return "PIM";
+    case IPPROTO_COMP:
+        return "COMP";
+    case IPPROTO_SCTP:
+        return "SCTP";
+    case IPPROTO_UDPLITE:
+        return "UDPLITE";
+    case IPPROTO_RAW:
+        return "RAW";
+    default:
+        return "UNKNOWN";
+    }
+}
+
+static inline const char *ldbc_method_tostring(enum ldbc_method method)
+{
+    switch (method)
+    {
+    case LDBC_METHOD_HASH_INT_IP:
+        return "outter_internal_ip";
+    case LDBC_METHOD_HASH_EXT_IP:
+        return "outter_external_ip";
+    case LDBC_METHOD_HASH_INT_IP_AND_EXT_IP:
+        return "outter_internal_ip_and_external_ip";
+    case LDBC_METHOD_HASH_INNERMOST_INT_IP:
+        return "inner_internal_ip";
+    case LDBC_METHOD_HASH_INNERMOST_EXT_IP:
+        return "inner_external_ip";
+    default:
+        return "unknown";
+    }
+}
+
+static inline const char *layer_type_tostring(enum layer_type type)
+{
+    switch (type)
+    {
+    case LAYER_TYPE_ETHER:
+        return "ETH";
+    case LAYER_TYPE_PPP:
+        return "PPP";
+    case LAYER_TYPE_HDLC:
+        return "HDLC";
+    case LAYER_TYPE_VLAN:
+        return "VLAN";
+    case LAYER_TYPE_PPPOE:
+        return "PPPOE";
+    case LAYER_TYPE_MPLS:
+        return "MPLS";
+    case LAYER_TYPE_IPV4:
+        return "IPV4";
+    case LAYER_TYPE_IPV6:
+        return "IPV6";
+    case LAYER_TYPE_GRE:
+        return "GRE";
+    case LAYER_TYPE_UDP:
+        return "UDP";
+    case LAYER_TYPE_TCP:
+        return "TCP";
+    case LAYER_TYPE_VXLAN:
+        return "VXLAN";
+    case LAYER_TYPE_GTPV1_U:
+        return "GTPV1";
+    default:
+        return "UNKNOWN";
+    }
+}
+
+static inline void set_tuple2(const char *data, enum layer_type type, struct tuple2 *tuple)
+{
+    const struct ip *ipv4 = NULL;
+    const struct ip6_hdr *ipv6 = NULL;
+
+    switch (type)
+    {
+    case LAYER_TYPE_IPV4:
+        ipv4 = (const struct ip *)data;
+        tuple->ip_type = IP_TYPE_V4;
+        tuple->src_addr.v4.s_addr = ipv4->ip_src.s_addr;
+        tuple->dst_addr.v4.s_addr = ipv4->ip_dst.s_addr;
+        break;
+    case LAYER_TYPE_IPV6:
+        ipv6 = (const struct ip6_hdr *)data;
+        tuple->ip_type = IP_TYPE_V6;
+        tuple->src_addr.v6 = ipv6->ip6_src;
+        tuple->dst_addr.v6 = ipv6->ip6_dst;
+        break;
+    default:
+        break;
+    }
+}
+
+static inline void set_tuple4(const char *data, enum layer_type type, struct tuple4 *tuple)
+{
+    const struct ip *ipv4 = NULL;
+    const struct ip6_hdr *ipv6 = NULL;
+    const struct tcphdr *tcp = NULL;
+    const struct udphdr *udp = NULL;
+
+    switch (type)
+    {
+    case LAYER_TYPE_TCP:
+        tcp = (const struct tcphdr *)data;
+        tuple->src_port = tcp->th_sport;
+        tuple->dst_port = tcp->th_dport;
+        break;
+    case LAYER_TYPE_UDP:
+        udp = (const struct udphdr *)data;
+        tuple->src_port = udp->uh_sport;
+        tuple->dst_port = udp->uh_dport;
+        break;
+    case LAYER_TYPE_IPV4:
+        ipv4 = (const struct ip *)data;
+        tuple->ip_type = IP_TYPE_V4;
+        tuple->src_addr.v4.s_addr = ipv4->ip_src.s_addr;
+        tuple->dst_addr.v4.s_addr = ipv4->ip_dst.s_addr;
+        break;
+    case LAYER_TYPE_IPV6:
+        ipv6 = (const struct ip6_hdr *)data;
+        tuple->ip_type = IP_TYPE_V6;
+        tuple->src_addr.v6 = ipv6->ip6_src;
+        tuple->dst_addr.v6 = ipv6->ip6_dst;
+        break;
+    default:
+        break;
+    }
+}
+
+static inline void set_tuple6(const char *data, enum layer_type type, struct tuple6 *tuple, uint64_t zone_id)
+{
+    const struct ip *ipv4 = NULL;
+    const struct ip6_hdr *ipv6 = NULL;
+    const struct tcphdr *tcp = NULL;
+    const struct udphdr *udp = NULL;
+
+    tuple->security_zone = zone_id;
+
+    switch (type)
+    {
+    case LAYER_TYPE_TCP:
+        tcp = (const struct tcphdr *)data;
+        tuple->ip_proto = IPPROTO_TCP;
+        tuple->src_port = tcp->th_sport;
+        tuple->dst_port = tcp->th_dport;
+        break;
+    case LAYER_TYPE_UDP:
+        udp = (const struct udphdr *)data;
+        tuple->ip_proto = IPPROTO_UDP;
+        tuple->src_port = udp->uh_sport;
+        tuple->dst_port = udp->uh_dport;
+        break;
+    case LAYER_TYPE_IPV4:
+        ipv4 = (const struct ip *)data;
+        tuple->ip_type = IP_TYPE_V4;
+        tuple->src_addr.v4.s_addr = ipv4->ip_src.s_addr;
+        tuple->dst_addr.v4.s_addr = ipv4->ip_dst.s_addr;
+        break;
+    case LAYER_TYPE_IPV6:
+        ipv6 = (const struct ip6_hdr *)data;
+        tuple->ip_type = IP_TYPE_V6;
+        tuple->src_addr.v6 = ipv6->ip6_src;
+        tuple->dst_addr.v6 = ipv6->ip6_dst;
+        break;
+    default:
+        break;
+    }
+}
+
+static inline struct layer_record *get_free_layer(struct packet *handler)
+{
+    if (handler->layers_used >= handler->layers_size)
+    {
+        return NULL;
+    }
+
+    return &handler->layers[handler->layers_used];
+}
+
+#define SET_LAYER(_handler, _layer, _type, _hdr_len, _data, _len) \
+    {                                                             \
+        (_layer)->type = (_type);                                 \
+        (_layer)->hdr_offset = (_handler)->data_len - (_len);     \
+        (_layer)->hdr_ptr = (_data);                              \
+        (_layer)->hdr_len = (_hdr_len);                           \
+        (_layer)->pld_ptr = (_data) + (_hdr_len);                 \
+        (_layer)->pld_len = (_len) - (_hdr_len);                  \
+        (_handler)->layers_used++;                                \
+    }
+
+/******************************************************************************
+ * Private API -- Parses
+ ******************************************************************************/
+
+static inline uint16_t get_gtp_hdr_len(const char *data, uint16_t len)
+{
+#define GTP_HDR_VER (0xE0)
+#define GTP_HDR_FLAG_N_PDU (0x01)
+#define GTP_HDR_FLAG_SEQ_NUM (0x02)
+#define GTP_HDR_FLAG_EXT_HDR (0x04)
+
+    struct gtp_hdr
+    {
+        uint8_t flags;
+        uint8_t msg_type;
+        uint16_t msg_len;
+        uint32_t teid;
+    } __attribute__((__packed__));
+
+    struct gtp_opt
+    {
+        uint16_t seq_num;
+        uint8_t npdu;
+        uint8_t next_ext_hdr;
+    } __attribute__((__packed__));
+
+    uint16_t hdr_offset = 0;
+    if (len < sizeof(struct gtp_hdr))
+    {
+        return 0;
+    }
+    const struct gtp_hdr *gtp = (const struct gtp_hdr *)data;
+    hdr_offset += sizeof(struct gtp_hdr); // skip gre hdr
+
+    // GTPv0 Not Supported
+    if (((gtp->flags & GTP_HDR_VER) >> 5) != 1)
+    {
+        return 0;
+    }
+
+    if (gtp->flags & (GTP_HDR_FLAG_SEQ_NUM | GTP_HDR_FLAG_N_PDU | GTP_HDR_FLAG_EXT_HDR))
+    {
+        if (hdr_offset + sizeof(struct gtp_opt) > len)
+        {
+            return 0;
+        }
+        struct gtp_opt *opt_hdr = (struct gtp_opt *)((char *)data + hdr_offset);
+        uint8_t next_ext_hdr = opt_hdr->next_ext_hdr;
+        hdr_offset += sizeof(struct gtp_opt); // skip gre opt
+
+        while (next_ext_hdr)
+        {
+            if (hdr_offset + 1 > len)
+            {
+                return 0;
+            }
+            uint8_t length = *((char *)data + hdr_offset) * 4 - 2;
+            hdr_offset += 1; // skip length field
+
+            if (hdr_offset + length + 1 > len)
+            {
+                return 0;
+            }
+            hdr_offset += length; // skip data field
+            next_ext_hdr = *((char *)data + hdr_offset);
+            hdr_offset += 1; // skip next ext hdr field
+        }
+    }
+
+    return hdr_offset;
+}
+
+static inline uint16_t get_gre_hdr_len(const char *data, uint16_t len)
+{
+    /*
+     * GRE Header Format (Version 0)
+     *
+     *   0                   1                   2                   3
+     *   0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+     *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+     *  |C|R|K|S|s|Recur|  Flags  | Ver |         Protocol Type         |
+     *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+     *  |      Checksum (optional)      |       Offset (optional)       |
+     *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+     *  |                         Key (optional)                        |
+     *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+     *  |                    Sequence Number (optional)                 |
+     *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+     *  |                         Routing (optional)
+     *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+     *
+     *   0                   1                   2                   3
+     *   0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+     *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+     *  |       Address Family          |  SRE Offset   |  SRE Length   |
+     *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+     *  |                        Routing Information ...
+     *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+     *
+     * https://datatracker.ietf.org/doc/html/rfc1701
+     * https://datatracker.ietf.org/doc/html/rfc2890
+     */
+
+    /*
+     * Enhanced GRE header (Version 1)
+     *
+     *   0                   1                   2                   3
+     *   0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+     *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+     *  |C|R|K|S|s|Recur|A| Flags | Ver |         Protocol Type         |
+     *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+     *  |    Key (HW) Payload Length    |       Key (LW) Call ID        |
+     *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+     *  |                  Sequence Number (Optional)                   |
+     *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+     *  |               Acknowledgment Number (Optional)                |
+     *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+     *
+     * https://datatracker.ietf.org/doc/html/rfc2637
+     */
+
+/* bit positions for flags in header */
+#define GRE_CHECKSUM 0x8000
+#define GRE_ROUTING 0x4000
+#define GRE_KEY 0x2000
+#define GRE_SEQUENCE 0x1000
+#define GRE_STRICTSOURCE 0x0800
+#define GRE_RECURSION 0x0700
+#define GRE_ACK 0x0080          /* only in special PPTPized GRE header */
+#define GRE_RESERVED_PPP 0x0078 /* only in special PPTPized GRE header */
+#define GRE_RESERVED 0x00F8
+#define GRE_VERSION 0x0007
+
+    if (len < 4)
+    {
+        return 0;
+    }
+
+    struct SRE
+    {
+        uint16_t address_family;
+        uint8_t sre_offset;
+        uint8_t sre_length;
+    } __attribute__((__packed__));
+
+    uint16_t sre_size = sizeof(struct SRE);
+    const uint16_t *gre = (const uint16_t *)data;
+    uint16_t flags = ntohs(gre[0]);
+    uint16_t version = flags & GRE_VERSION;
+    uint16_t hdr_offset = 0;
+
+    if (version == 0)
+    {
+        hdr_offset = 4;
+
+        if ((flags & GRE_CHECKSUM) || (flags & GRE_ROUTING))
+        {
+            hdr_offset += 4;
+        }
+        if (flags & GRE_KEY)
+        {
+            hdr_offset += 4;
+        }
+        if (flags & GRE_SEQUENCE)
+        {
+            hdr_offset += 4;
+        }
+        if (flags & GRE_ROUTING)
+        {
+            while (hdr_offset + sre_size <= len)
+            {
+                struct SRE *sre = (struct SRE *)((char *)data + hdr_offset);
+                if (sre->sre_length == 0)
+                {
+                    hdr_offset += sre_size;
+                    break;
+                }
+                else
+                {
+                    hdr_offset += sre_size + sre->sre_length;
+                }
+            }
+        }
+    }
+
+    if (version == 1)
+    {
+        hdr_offset = 8;
+        if (flags & GRE_SEQUENCE)
+        {
+            hdr_offset += 4;
+        }
+        if (flags & GRE_ACK)
+        {
+            hdr_offset += 4;
+        }
+    }
+
+    if (hdr_offset > len)
+    {
+        return 0;
+    }
+
+    return hdr_offset;
+}
+
+static inline const char *parse_ether(struct packet *handler, const char *data, uint16_t len)
+{
+    if (unlikely(len < sizeof(struct ethhdr)))
+    {
+        PACKET_LOG_DATA_INSUFFICIENCY(LAYER_TYPE_ETHER);
+        return data;
+    }
+
+    struct layer_record *layer = get_free_layer(handler);
+    if (unlikely(layer == NULL))
+    {
+        return data;
+    }
+    uint16_t next_proto = ntohs(((struct ethhdr *)data)->h_proto);
+    SET_LAYER(handler, layer, LAYER_TYPE_ETHER, sizeof(struct ethhdr), data, len);
+
+    // TESTED
+    return parse_l3(handler, next_proto, layer->pld_ptr, layer->pld_len);
+}
+
+static inline const char *parse_ppp(struct packet *handler, const char *data, uint16_t len)
+{
+    if (unlikely(len < 4))
+    {
+        PACKET_LOG_DATA_INSUFFICIENCY(LAYER_TYPE_PPP);
+        return data;
+    }
+
+    struct layer_record *layer = get_free_layer(handler);
+    if (unlikely(layer == NULL))
+    {
+        return data;
+    }
+    uint16_t next_proto = ntohs(*((uint16_t *)data + 1));
+    SET_LAYER(handler, layer, LAYER_TYPE_PPP, 4, data, len);
+
+    switch (next_proto)
+    {
+        // TESTED
+    case PPP_IP:
+        return parse_ipv4(handler, layer->pld_ptr, layer->pld_len);
+    case PPP_IPV6:
+        return parse_ipv6(handler, layer->pld_ptr, layer->pld_len);
+    default:
+        PACKET_LOG_UNSUPPORT_PROTO("ppp", next_proto);
+        return layer->pld_ptr;
+    }
+}
+
+static inline const char *parse_vlan(struct packet *handler, const char *data, uint16_t len)
+{
+    struct vlan_hdr
+    {
+        uint16_t vlan_cfi;
+        uint16_t protocol;
+    } __attribute__((__packed__));
+
+    if (unlikely(len < sizeof(struct vlan_hdr)))
+    {
+        PACKET_LOG_DATA_INSUFFICIENCY(LAYER_TYPE_VLAN);
+        return data;
+    }
+
+    struct layer_record *layer = get_free_layer(handler);
+    if (unlikely(layer == NULL))
+    {
+        return data;
+    }
+    uint16_t next_proto = ntohs(((struct vlan_hdr *)data)->protocol);
+    SET_LAYER(handler, layer, LAYER_TYPE_VLAN, sizeof(struct vlan_hdr), data, len);
+
+    // TESTED
+    return parse_l3(handler, next_proto, layer->pld_ptr, layer->pld_len);
+}
+
+static inline const char *parse_pppoe_ses(struct packet *handler, const char *data, uint16_t len)
+{
+#define PPPOE_TYPE_IPV4 0x2100
+#define PPPOE_TYPE_IPV6 0x5700
+
+    if (unlikely(len < 8))
+    {
+        PACKET_LOG_DATA_INSUFFICIENCY(LAYER_TYPE_PPPOE);
+        return data;
+    }
+
+    struct layer_record *layer = get_free_layer(handler);
+    if (unlikely(layer == NULL))
+    {
+        return data;
+    }
+    uint16_t next_proto = *((uint16_t *)data + 3);
+    SET_LAYER(handler, layer, LAYER_TYPE_PPPOE, 8, data, len);
+
+    switch (next_proto)
+    {
+        // TESTED
+    case PPPOE_TYPE_IPV4:
+        return parse_ipv4(handler, layer->pld_ptr, layer->pld_len);
+    case PPPOE_TYPE_IPV6:
+        return parse_ipv6(handler, layer->pld_ptr, layer->pld_len);
+    default:
+        PACKET_LOG_UNSUPPORT_PROTO("pppoe", next_proto);
+        return layer->pld_ptr;
+    }
+}
+
+static inline const char *parse_mpls(struct packet *handler, const char *data, uint16_t len)
+{
+    /*
+     * MPLS Format
+     * 0                   1                   2                   3
+     * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+     * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+     * |                Label                  | Exp |S|       TTL     |
+     * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+     * Label : Label Value      20 bits
+     * Exp   : Experimental Use  3 bits
+     * S     : Bottom of Stack   1 bit
+     * TTL   : Time to Live      8 bits
+     */
+
+#define MPLS_LABEL_MASK (0xFFFFF000)
+#define MPLS_EXP_MASK (0x00000E00)
+#define MPLS_BLS_MASK (0x00000100)
+#define MPLS_TTL_MASK (0x000000FF)
+
+    enum mpls_next_proto
+    {
+        MPLS_NEXT_PROTO_ETHER = 0x0,
+        MPLS_NEXT_PROTO_MPLS = 0x1,
+        MPLS_NEXT_PROTO_IPV4 = 0x4,
+        MPLS_NEXT_PROTO_IPV6 = 0x6,
+    };
+
+    // 4 + 1
+    if (unlikely(len < 5))
+    {
+        PACKET_LOG_DATA_INSUFFICIENCY(LAYER_TYPE_MPLS);
+        return data;
+    }
+
+    struct layer_record *layer = get_free_layer(handler);
+    if (unlikely(layer == NULL))
+    {
+        return data;
+    }
+
+    uint16_t hdr_len = 4;
+    uint32_t *hdr = (uint32_t *)data;
+    unsigned int mpls_bls = (ntohl(*hdr) & MPLS_BLS_MASK) >> 8;
+    enum mpls_next_proto next_proto;
+    if (mpls_bls == 1)
+    {
+        switch ((((uint8_t *)(data + 4))[0]) >> 4)
+        {
+        case 0:
+            /*
+             * PW Ethernet Control Word
+             * 0                   1                   2                   3
+             * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+             * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+             * |0 0 0 0|   Reserved            |       Sequence Number         |
+             * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+             * Reference: https://tools.ietf.org/html/rfc4448
+             */
+            hdr_len += 4; // skip PW Ethernet Control Word
+            next_proto = MPLS_NEXT_PROTO_ETHER;
+            break;
+        case 4:
+            next_proto = MPLS_NEXT_PROTO_IPV4;
+            break;
+        case 6:
+            next_proto = MPLS_NEXT_PROTO_IPV6;
+            break;
+        default:
+            next_proto = MPLS_NEXT_PROTO_ETHER;
+            break;
+        }
+    }
+    else
+    {
+        next_proto = MPLS_NEXT_PROTO_MPLS;
+    }
+    SET_LAYER(handler, layer, LAYER_TYPE_MPLS, hdr_len, data, len);
+
+    switch (next_proto)
+    {
+        // TESTED
+    case MPLS_NEXT_PROTO_IPV4:
+        return parse_ipv4(handler, layer->pld_ptr, layer->pld_len);
+    case MPLS_NEXT_PROTO_IPV6:
+        return parse_ipv6(handler, layer->pld_ptr, layer->pld_len);
+        // TESTED
+    case MPLS_NEXT_PROTO_ETHER:
+        return parse_ether(handler, layer->pld_ptr, layer->pld_len);
+        // TESTED
+    case MPLS_NEXT_PROTO_MPLS:
+        return parse_mpls(handler, layer->pld_ptr, layer->pld_len);
+    default:
+        // unreachable
+        return layer->pld_ptr;
+    }
+}
+
+static inline const char *parse_ipv4(struct packet *handler, const char *data, uint16_t len)
+{
+    if (unlikely(len < sizeof(struct ip)))
+    {
+        PACKET_LOG_DATA_INSUFFICIENCY(LAYER_TYPE_IPV4);
+        return data;
+    }
+
+    struct layer_record *layer = get_free_layer(handler);
+    if (unlikely(layer == NULL))
+    {
+        return data;
+    }
+    struct ip *hdr = (struct ip *)data;
+    uint8_t next_proto = hdr->ip_p;
+    uint16_t hdr_len = (hdr->ip_hl & 0xf) * 4u;
+    SET_LAYER(handler, layer, LAYER_TYPE_IPV4, hdr_len, data, len);
+
+    // TESTED
+    return parse_l4(handler, next_proto, layer->pld_ptr, layer->pld_len);
+}
+
+static inline const char *parse_ipv6(struct packet *handler, const char *data, uint16_t len)
+{
+    if (unlikely(len < sizeof(struct ip6_hdr)))
+    {
+        PACKET_LOG_DATA_INSUFFICIENCY(LAYER_TYPE_IPV6);
+        return data;
+    }
+
+    struct layer_record *layer = get_free_layer(handler);
+    if (unlikely(layer == NULL))
+    {
+        return data;
+    }
+    uint8_t next_proto = ((struct ip6_hdr *)data)->ip6_nxt;
+    SET_LAYER(handler, layer, LAYER_TYPE_IPV6, sizeof(struct ip6_hdr), data, len);
+
+    // TESTED
+    return parse_l4(handler, next_proto, layer->pld_ptr, layer->pld_len);
+}
+
+static inline const char *parse_gre(struct packet *handler, const char *data, uint16_t len)
+{
+#define GRE_PRO_IPV4 (0x0800)
+#define GRE_PRO_IPV6 (0x86DD)
+#define GRE_PRO_ARP (0x0806)
+#define GRE_PRO_PPP (0x880B)
+
+    uint16_t hdr_len = get_gre_hdr_len(data, len);
+    if (unlikely(hdr_len == 0))
+    {
+        PACKET_LOG_DATA_INSUFFICIENCY(LAYER_TYPE_GRE);
+        return data;
+    }
+
+    struct layer_record *layer = get_free_layer(handler);
+    if (unlikely(layer == NULL))
+    {
+        return data;
+    }
+    uint16_t next_proto = ntohs(*((uint16_t *)data + 1));
+    SET_LAYER(handler, layer, LAYER_TYPE_GRE, hdr_len, data, len);
+
+    switch (next_proto)
+    {
+    case GRE_PRO_IPV4:
+        return parse_ipv4(handler, layer->pld_ptr, layer->pld_len);
+    case GRE_PRO_IPV6:
+        return parse_ipv6(handler, layer->pld_ptr, layer->pld_len);
+        // TESTED
+    case GRE_PRO_PPP:
+        return parse_ppp(handler, layer->pld_ptr, layer->pld_len);
+    default:
+        PACKET_LOG_UNSUPPORT_PROTO("gre", next_proto);
+        return layer->pld_ptr;
+    }
+}
+
+static inline const char *parse_udp(struct packet *handler, const char *data, uint16_t len)
+{
+    if (unlikely(len < sizeof(struct udphdr)))
+    {
+        PACKET_LOG_DATA_INSUFFICIENCY(LAYER_TYPE_UDP);
+        return data;
+    }
+
+    struct layer_record *layer = get_free_layer(handler);
+    if (unlikely(layer == NULL))
+    {
+        return data;
+    }
+    struct udphdr *hdr = (struct udphdr *)data;
+    SET_LAYER(handler, layer, LAYER_TYPE_UDP, sizeof(struct udphdr), data, len);
+
+    switch (ntohs(hdr->uh_dport))
+    {
+        // TESTED
+    // VXLAN_DPORT
+    case 4789:
+        return parse_vxlan(handler, layer->pld_ptr, layer->pld_len);
+        // TESTED
+    // GTP1U_PORT
+    case 2152:
+        return parse_gtpv1_u(handler, layer->pld_ptr, layer->pld_len);
+    default:
+        return layer->pld_ptr;
+    }
+}
+
+static inline const char *parse_tcp(struct packet *handler, const char *data, uint16_t len)
+{
+    if (unlikely(len < sizeof(struct tcphdr)))
+    {
+        PACKET_LOG_DATA_INSUFFICIENCY(LAYER_TYPE_TCP);
+        return data;
+    }
+
+    struct layer_record *layer = get_free_layer(handler);
+    if (unlikely(layer == NULL))
+    {
+        return data;
+    }
+    uint16_t hdr_len = ((struct tcphdr *)data)->th_off << 2;
+    SET_LAYER(handler, layer, LAYER_TYPE_TCP, hdr_len, data, len);
+
+    return layer->pld_ptr;
+}
+
+static inline const char *parse_vxlan(struct packet *handler, const char *data, uint16_t len)
+{
+    struct vxlan_hdr
+    {
+        uint8_t flags[2];
+        uint16_t gdp;
+        uint8_t vni[3];
+        uint8_t reserved;
+    } __attribute__((__packed__));
+
+    if (unlikely(len < sizeof(struct vxlan_hdr)))
+    {
+        PACKET_LOG_DATA_INSUFFICIENCY(LAYER_TYPE_VXLAN);
+        return data;
+    }
+
+    struct layer_record *layer = get_free_layer(handler);
+    if (unlikely(layer == NULL))
+    {
+        return data;
+    }
+    SET_LAYER(handler, layer, LAYER_TYPE_VXLAN, sizeof(struct vxlan_hdr), data, len);
+
+    // TESTED
+    return parse_ether(handler, layer->pld_ptr, layer->pld_len);
+}
+
+static inline const char *parse_gtpv1_u(struct packet *handler, const char *data, uint16_t len)
+{
+    uint16_t hdr_len = get_gtp_hdr_len(data, len);
+    if (unlikely(hdr_len == 0))
+    {
+        PACKET_LOG_DATA_INSUFFICIENCY(LAYER_TYPE_GTPV1_U);
+        return data;
+    }
+
+    struct layer_record *layer = get_free_layer(handler);
+    if (unlikely(layer == NULL))
+    {
+        return data;
+    }
+    uint8_t next_proto = (((const uint8_t *)(data + hdr_len))[0]) >> 4;
+    SET_LAYER(handler, layer, LAYER_TYPE_GTPV1_U, hdr_len, data, len);
+
+    switch (next_proto)
+    {
+        // TESTED
+    case 4:
+        return parse_ipv4(handler, layer->pld_ptr, layer->pld_len);
+        // TESTED
+    case 6:
+        return parse_ipv6(handler, layer->pld_ptr, layer->pld_len);
+    default:
+        PACKET_LOG_UNSUPPORT_PROTO("gtp", next_proto);
+        return layer->pld_ptr;
+    }
+}
+
+static inline const char *parse_l3(struct packet *handler, uint16_t next_proto, const char *data, uint16_t len)
+{
+    switch (next_proto)
+    {
+        // TESTED
+    case ETH_P_8021Q:
+    case ETH_P_8021AD:
+        return parse_vlan(handler, data, len);
+        // TESTED
+    case ETH_P_IP:
+        return parse_ipv4(handler, data, len);
+        // TESTED
+    case ETH_P_IPV6:
+        return parse_ipv6(handler, data, len);
+        // TESTED
+    case ETH_P_PPP_SES:
+        return parse_pppoe_ses(handler, data, len);
+        // TESTED
+    case ETH_P_MPLS_UC:
+        return parse_mpls(handler, data, len);
+    default:
+        // TESTED ARP
+        PACKET_LOG_UNSUPPORT_ETHPROTO("l3", next_proto);
+        return data;
+    }
+}
+
+static inline const char *parse_l4(struct packet *handler, uint8_t next_proto, const char *data, uint16_t len)
+{
+    switch (next_proto)
+    {
+        // TESTED
+    case IPPROTO_TCP:
+        return parse_tcp(handler, data, len);
+        // TESTED
+    case IPPROTO_UDP:
+        return parse_udp(handler, data, len);
+        // TESTED
+    case IPPROTO_IPIP:
+        return parse_ipv4(handler, data, len);
+        // TESTED
+    case IPPROTO_IPV6:
+        return parse_ipv6(handler, data, len);
+        // TESTED
+    case IPPROTO_GRE:
+        return parse_gre(handler, data, len);
+    default:
+        PACKET_LOG_UNSUPPORT_IPPROTO("l4", next_proto);
+        return data;
+    }
+}
+
+/******************************************************************************
+ * Public API
+ ******************************************************************************/
+
+// return innermost payload
+const char *packet_parse(struct packet *handler, const char *data, uint16_t len)
+{
+    handler->layers_used = 0;
+    handler->layers_size = PACKET_MAX_LAYERS;
+    handler->data_ptr = data;
+    handler->data_len = len;
+    handler->zone_id = 0;
+
+    // TESTED
+    return parse_ether(handler, data, len);
+}
+
+void packet_print(const struct packet *handler)
+{
+    if (handler == NULL)
+    {
+        return;
+    }
+
+    printf("packet: %p, data_ptr: %p, data_len: %u, layers_used: %u, layers_size: %u\n",
+           handler, handler->data_ptr, handler->data_len,
+           handler->layers_used, handler->layers_size);
+    for (uint8_t i = 0; i < handler->layers_used; i++)
+    {
+        const struct layer_record *layer = &handler->layers[i];
+        printf("  layer[%u]: %p, type: %s, hdr_offset: %u, hdr_ptr: %p, hdr_len: %u, pld_ptr: %p, pld_len: %u\n",
+               i, layer, layer_type_tostring(layer->type), layer->hdr_offset,
+               layer->hdr_ptr, layer->hdr_len, layer->pld_ptr, layer->pld_len);
+    }
+}
+
+// return  0 : found
+// return -1 : not found
+int packet_get_innermost_tuple2(const struct packet *handler, struct tuple2 *tuple)
+{
+    const struct layer_record *layer = NULL;
+
+    for (int8_t i = handler->layers_used - 1; i >= 0; i--)
+    {
+        layer = &handler->layers[i];
+
+        if (layer->type & LAYER_TYPE_L3)
+        {
+            set_tuple2((const char *)handler->data_ptr + layer->hdr_offset, layer->type, tuple);
+            return 0;
+        }
+    }
+
+    return -1;
+}
+
+// return  0 : found
+// return -1 : not found
+int packet_get_outermost_tuple2(const struct packet *handler, struct tuple2 *tuple)
+{
+    const struct layer_record *layer = NULL;
+
+    for (int8_t i = 0; i < handler->layers_used; i++)
+    {
+        layer = &handler->layers[i];
+
+        if (layer->type & LAYER_TYPE_L3)
+        {
+            set_tuple2((const char *)handler->data_ptr + layer->hdr_offset, layer->type, tuple);
+            return 0;
+        }
+    }
+
+    return -1;
+}
+
+// return  0 : found
+// return -1 : not found
+int packet_get_innermost_tuple4(const struct packet *handler, struct tuple4 *tuple)
+{
+    const struct layer_record *layer_l3 = NULL;
+    const struct layer_record *layer_l4 = NULL;
+    const struct layer_record *layer = NULL;
+
+    for (int8_t i = handler->layers_used - 1; i >= 0; i--)
+    {
+        layer = &handler->layers[i];
+
+        // first get L4 layer
+        if (layer->type & LAYER_TYPE_L4)
+        {
+            layer_l4 = layer;
+            continue;
+        }
+
+        // second get L3 layer
+        if (layer->type & LAYER_TYPE_L3)
+        {
+            layer_l3 = layer;
+            break;
+        }
+    }
+
+    if (layer_l3 && layer_l4)
+    {
+        set_tuple4((const char *)handler->data_ptr + layer_l3->hdr_offset, layer_l3->type, tuple);
+        set_tuple4((const char *)handler->data_ptr + layer_l4->hdr_offset, layer_l4->type, tuple);
+        return 0;
+    }
+    else
+    {
+        return -1;
+    }
+}
+
+// return  0 : found
+// return -1 : not found
+int packet_get_outermost_tuple4(const struct packet *handler, struct tuple4 *tuple)
+{
+    const struct layer_record *layer_l3 = NULL;
+    const struct layer_record *layer_l4 = NULL;
+    const struct layer_record *layer = NULL;
+
+    for (int8_t i = 0; i < handler->layers_used; i++)
+    {
+        layer = &handler->layers[i];
+
+        // first get L3 layer
+        if (layer->type & LAYER_TYPE_L3)
+        {
+            layer_l3 = layer;
+            continue;
+        }
+
+        // second get L4 layer
+        if (layer->type & LAYER_TYPE_L4)
+        {
+            layer_l4 = layer;
+            break;
+        }
+    }
+
+    if (layer_l3 && layer_l4)
+    {
+        set_tuple4((const char *)handler->data_ptr + layer_l3->hdr_offset, layer_l3->type, tuple);
+        set_tuple4((const char *)handler->data_ptr + layer_l4->hdr_offset, layer_l4->type, tuple);
+        return 0;
+    }
+    else
+    {
+        return -1;
+    }
+}
+
+// return  0 : found
+// return -1 : not found
+int packet_get_innermost_tuple6(const struct packet *handler, struct tuple6 *tuple)
+{
+    const struct layer_record *layer_l3 = NULL;
+    const struct layer_record *layer_l4 = NULL;
+    const struct layer_record *layer = NULL;
+
+    for (int8_t i = handler->layers_used - 1; i >= 0; i--)
+    {
+        layer = &handler->layers[i];
+
+        // first get L4 layer
+        if (layer->type & LAYER_TYPE_L4)
+        {
+            layer_l4 = layer;
+            continue;
+        }
+
+        // second get L3 layer
+        if (layer->type & LAYER_TYPE_L3)
+        {
+            layer_l3 = layer;
+            break;
+        }
+    }
+
+    if (layer_l3 && layer_l4)
+    {
+        set_tuple6((const char *)handler->data_ptr + layer_l3->hdr_offset, layer_l3->type, tuple, handler->zone_id);
+        set_tuple6((const char *)handler->data_ptr + layer_l4->hdr_offset, layer_l4->type, tuple, handler->zone_id);
+        return 0;
+    }
+    else
+    {
+        return -1;
+    }
+}
+
+// return  0 : found
+// return -1 : not found
+int packet_get_outermost_tuple6(const struct packet *handler, struct tuple6 *tuple)
+{
+    const struct layer_record *layer_l3 = NULL;
+    const struct layer_record *layer_l4 = NULL;
+    const struct layer_record *layer = NULL;
+
+    for (int8_t i = 0; i < handler->layers_used; i++)
+    {
+        layer = &handler->layers[i];
+
+        // first get L3 layer
+        if (layer->type & LAYER_TYPE_L3)
+        {
+            layer_l3 = layer;
+            continue;
+        }
+
+        // second get L4 layer
+        if (layer->type & LAYER_TYPE_L4)
+        {
+            layer_l4 = layer;
+            break;
+        }
+    }
+
+    if (layer_l3 && layer_l4)
+    {
+        set_tuple6((const char *)handler->data_ptr + layer_l3->hdr_offset, layer_l3->type, tuple, handler->zone_id);
+        set_tuple6((const char *)handler->data_ptr + layer_l4->hdr_offset, layer_l4->type, tuple, handler->zone_id);
+        return 0;
+    }
+    else
+    {
+        return -1;
+    }
+}
+
+const struct layer_record *packet_get_innermost_layer(const struct packet *handler, enum layer_type type)
+{
+    const struct layer_record *layer = NULL;
+
+    for (int8_t i = handler->layers_used - 1; i >= 0; i--)
+    {
+        layer = &handler->layers[i];
+        if (layer->type & type)
+        {
+            return layer;
+        }
+    }
+
+    return NULL;
+}
+
+const struct layer_record *packet_get_outermost_layer(const struct packet *handler, enum layer_type type)
+{
+    const struct layer_record *layer = NULL;
+
+    for (int8_t i = 0; i < handler->layers_used; i++)
+    {
+        layer = &handler->layers[i];
+        if (layer->type & type)
+        {
+            return layer;
+        }
+    }
+
+    return NULL;
+}
+
+// direction 1: E2I
+// direction 0: I2E
+uint64_t packet_get_hash(const struct packet *handler, enum ldbc_method method, int direction)
+{
+    uint64_t temp = 0;
+    uint64_t hash_value = 1;
+
+    int inner_addr_len = 0;
+    int outer_addr_len = 0;
+    const char *inner_src_addr = NULL;
+    const char *inner_dst_addr = NULL;
+    const char *outer_src_addr = NULL;
+    const char *outer_dst_addr = NULL;
+
+    struct tuple2 inner_addr;
+    struct tuple2 outer_addr;
+
+    if (handler == NULL)
+    {
+        return hash_value;
+    }
+
+    if (packet_get_innermost_tuple2(handler, &inner_addr) == -1)
+    {
+        return hash_value;
+    }
+
+    if (packet_get_outermost_tuple2(handler, &outer_addr) == -1)
+    {
+        return hash_value;
+    }
+
+    if (inner_addr.ip_type == IP_TYPE_V4)
+    {
+        inner_src_addr = (const char *)&inner_addr.src_addr.v4;
+        inner_dst_addr = (const char *)&inner_addr.dst_addr.v4;
+        inner_addr_len = sizeof(struct in_addr);
+    }
+    else
+    {
+        inner_src_addr = (const char *)&inner_addr.src_addr.v6;
+        inner_dst_addr = (const char *)&inner_addr.dst_addr.v6;
+        inner_addr_len = sizeof(struct in6_addr);
+    }
+
+    if (outer_addr.ip_type == IP_TYPE_V4)
+    {
+        outer_src_addr = (const char *)&outer_addr.src_addr.v4;
+        outer_dst_addr = (const char *)&outer_addr.dst_addr.v4;
+        outer_addr_len = sizeof(struct in_addr);
+    }
+    else
+    {
+        outer_src_addr = (const char *)&outer_addr.src_addr.v6;
+        outer_dst_addr = (const char *)&outer_addr.dst_addr.v6;
+        outer_addr_len = sizeof(struct in6_addr);
+    }
+
+    switch (method)
+    {
+    case LDBC_METHOD_HASH_INT_IP:
+        if (direction)
+        {
+            // direction 1: E2I
+            HASH_VALUE(outer_dst_addr, outer_addr_len, hash_value);
+        }
+        else
+        {
+            // direction 0: I2E
+            HASH_VALUE(outer_src_addr, outer_addr_len, hash_value);
+        }
+        break;
+    case LDBC_METHOD_HASH_EXT_IP:
+        if (direction)
+        {
+            // direction 1: E2I
+            HASH_VALUE(outer_src_addr, outer_addr_len, hash_value);
+        }
+        else
+        {
+            // direction 0: I2E
+            HASH_VALUE(outer_dst_addr, outer_addr_len, hash_value);
+        }
+        break;
+    case LDBC_METHOD_HASH_INT_IP_AND_EXT_IP:
+        HASH_VALUE(outer_src_addr, outer_addr_len, hash_value);
+        HASH_VALUE(outer_dst_addr, outer_addr_len, temp);
+        hash_value = hash_value ^ temp;
+        break;
+    case LDBC_METHOD_HASH_INNERMOST_INT_IP:
+        if (direction)
+        {
+            // direction 1: E2I
+            HASH_VALUE(inner_dst_addr, inner_addr_len, hash_value);
+        }
+        else
+        {
+            // direction 0: I2E
+            HASH_VALUE(inner_src_addr, inner_addr_len, hash_value);
+        }
+        break;
+    case LDBC_METHOD_HASH_INNERMOST_EXT_IP:
+        if (direction)
+        {
+            // direction 1: E2I
+            HASH_VALUE(inner_src_addr, inner_addr_len, hash_value);
+        }
+        else
+        {
+            // direction 0: I2E
+            HASH_VALUE(inner_dst_addr, inner_addr_len, hash_value);
+        }
+        break;
+    default:
+        return hash_value;
+    }
+
+#if 0
+    char *inner_addr_str = tuple2_tostring(&inner_addr);
+    char *outer_addr_str = tuple2_tostring(&outer_addr);
+    printf("%s: outer_addr: %s, inner_addr: %s, dir: %s, hash_method: %s, hash_value: %lu\n",
+           LOG_PACKET, outer_addr_str, inner_addr_str, (direction ? "E2I" : "I2E"), ldbc_method_tostring(method), hash_value);
+    free(inner_addr_str);
+    free(outer_addr_str);
+#endif
+
+    return hash_value;
+}
diff --git a/src/packet/packet.h b/src/packet/packet.h
index fbde808..e718041 100644
--- a/src/packet/packet.h
+++ b/src/packet/packet.h
@@ -6,7 +6,108 @@ extern "C"
 {
 #endif
 
-struct packet;
+#include <stdint.h>
+#include <stdio.h>
+#include "tuple.h"
+
+#define PACKET_MAX_LAYERS 16
+//#define PACKET_LOG_ERROR(format, ...) void(0)
+#ifndef PACKET_LOG_ERROR
+#define PACKET_LOG_ERROR(format, ...) \
+    fprintf(stderr, "ERROR " format "\n", ##__VA_ARGS__);
+#endif
+
+enum layer_type
+{
+    // 数据链路层
+    LAYER_TYPE_ETHER = 1 << 0,
+    LAYER_TYPE_PPP = 1 << 1,
+    LAYER_TYPE_HDLC = 1 << 2,
+    LAYER_TYPE_L2 = (LAYER_TYPE_ETHER | LAYER_TYPE_PPP | LAYER_TYPE_HDLC),
+
+    // 数据链路层 -- 隧道
+    LAYER_TYPE_VLAN = 1 << 3,
+    LAYER_TYPE_PPPOE = 1 << 4,
+    LAYER_TYPE_MPLS = 1 << 5,
+    LAYER_TYPE_L2_TUN = (LAYER_TYPE_VLAN | LAYER_TYPE_PPPOE | LAYER_TYPE_MPLS),
+
+    // 网络层
+    LAYER_TYPE_IPV4 = 1 << 6,
+    LAYER_TYPE_IPV6 = 1 << 7,
+    LAYER_TYPE_L3 = (LAYER_TYPE_IPV4 | LAYER_TYPE_IPV6),
+
+    // 网络层 -- 隧道
+    LAYER_TYPE_GRE = 1 << 8,
+    LAYER_TYPE_L3_TUN = (LAYER_TYPE_GRE),
+
+    // 传输层
+    LAYER_TYPE_UDP = 1 << 9,
+    LAYER_TYPE_TCP = 1 << 10,
+    LAYER_TYPE_L4 = (LAYER_TYPE_UDP | LAYER_TYPE_TCP),
+
+    // 传输层 -- 隧道
+    LAYER_TYPE_VXLAN = 1 << 11,
+    LAYER_TYPE_GTPV1_U = 1 << 12,
+
+    // ALL
+    LAYER_TYPE_ALL = (LAYER_TYPE_L2 | LAYER_TYPE_L2_TUN | LAYER_TYPE_L3 | LAYER_TYPE_L3_TUN | LAYER_TYPE_L4 | LAYER_TYPE_VXLAN | LAYER_TYPE_GTPV1_U),
+};
+
+enum ldbc_method
+{
+    LDBC_METHOD_HASH_INT_IP = 1,
+    LDBC_METHOD_HASH_EXT_IP = 2,
+    LDBC_METHOD_HASH_INT_IP_AND_EXT_IP = 3,
+    LDBC_METHOD_HASH_INNERMOST_INT_IP = 4,
+    LDBC_METHOD_HASH_INNERMOST_EXT_IP = 5,
+};
+
+struct layer_record
+{
+    enum layer_type type;
+    const char *hdr_ptr; // header pointer
+    const char *pld_ptr; // payload pointer
+    uint16_t hdr_offset; // header offset from data_ptr
+    uint16_t hdr_len;    // header length
+    uint16_t pld_len;    // payload length
+};
+
+struct packet
+{
+    struct layer_record layers[PACKET_MAX_LAYERS];
+    int8_t layers_used;
+    int8_t layers_size;
+
+    const char *data_ptr;
+    uint16_t data_len;
+    uint64_t zone_id;
+};
+
+// return innermost payload
+const char *packet_parse(struct packet *handler, const char *data, uint16_t len);
+void packet_print(const struct packet *handler);
+
+// return  0 : found
+// return -1 : not found
+int packet_get_innermost_tuple2(const struct packet *handler, struct tuple2 *tuple);
+int packet_get_outermost_tuple2(const struct packet *handler, struct tuple2 *tuple);
+
+// return  0 : found
+// return -1 : not found
+int packet_get_innermost_tuple4(const struct packet *handler, struct tuple4 *tuple);
+int packet_get_outermost_tuple4(const struct packet *handler, struct tuple4 *tuple);
+
+// return  0 : found
+// return -1 : not found
+int packet_get_innermost_tuple6(const struct packet *handler, struct tuple6 *tuple);
+int packet_get_outermost_tuple6(const struct packet *handler, struct tuple6 *tuple);
+
+const struct layer_record *packet_get_innermost_layer(const struct packet *handler, enum layer_type type);
+const struct layer_record *packet_get_outermost_layer(const struct packet *handler, enum layer_type type);
+
+// direction 1: E2I
+// direction 0: I2E
+uint64_t packet_get_hash(const struct packet *handler, enum ldbc_method method, int direction);
 
 #ifdef __cpluscplus
 }