diff --git a/src/packet/CMakeLists.txt b/src/packet/CMakeLists.txt
index b910682..aad8388 100644
--- a/src/packet/CMakeLists.txt
+++ b/src/packet/CMakeLists.txt
@@ -4,7 +4,6 @@ add_library(packet
     packet_builder.cpp
     packet_filter.cpp
     packet_dump.cpp
-    packet_ldbc.cpp
     checksum.cpp)
 target_include_directories(packet PUBLIC ${CMAKE_CURRENT_LIST_DIR})
 target_include_directories(packet PUBLIC ${CMAKE_SOURCE_DIR}/deps/uthash)
diff --git a/src/packet/packet.cpp b/src/packet/packet.cpp
index 0c716fa..cfb3b56 100644
--- a/src/packet/packet.cpp
+++ b/src/packet/packet.cpp
@@ -2,6 +2,7 @@
 
 #include "log.h"
 #include "tuple.h"
+#include "uthash.h"
 #include "packet_helper.h"
 #include "packet_private.h"
 
@@ -455,7 +456,7 @@ int packet_get_outermost_tuple6(const struct packet *pkt, struct tuple6 *tuple)
 }
 
 /******************************************************************************
- * layer layer
+ * layer uitls
  ******************************************************************************/
 
 int packet_get_layer_count(const struct packet *pkt)
@@ -692,6 +693,128 @@ int packet_get_tunnel_by_idx(const struct packet *pkt, int idx, struct tunnel *o
     return -1;
 }
 
+/******************************************************************************
+ * load balance uitls
+ ******************************************************************************/
+
+uint64_t packet_ldbc_hash(const struct packet *pkt, enum packet_load_balance_method method, enum packet_direction 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 (pkt == NULL)
+    {
+        return hash_value;
+    }
+
+    if (packet_get_innermost_tuple2(pkt, &inner_addr) == -1)
+    {
+        return hash_value;
+    }
+
+    if (packet_get_outermost_tuple2(pkt, &outer_addr) == -1)
+    {
+        return hash_value;
+    }
+
+    if (inner_addr.addr_family == AF_INET)
+    {
+        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.addr_family == AF_INET)
+    {
+        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 PKT_LDBC_METH_OUTERMOST_INT_IP:
+        if (direction == PACKET_DIRECTION_INCOMING)
+        {
+            // 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 PKT_LDBC_METH_OUTERMOST_EXT_IP:
+        if (direction == PACKET_DIRECTION_INCOMING)
+        {
+            // 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 PKT_LDBC_METH_OUTERMOST_INT_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 PKT_LDBC_METH_INNERMOST_INT_IP:
+        if (direction == PACKET_DIRECTION_INCOMING)
+        {
+            // 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 PKT_LDBC_METH_INNERMOST_EXT_IP:
+        if (direction == PACKET_DIRECTION_INCOMING)
+        {
+            // 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;
+    }
+
+    return hash_value;
+}
+
 /******************************************************************************
  * other uitls
  ******************************************************************************/
diff --git a/src/packet/packet_builder.h b/src/packet/packet_builder.h
deleted file mode 100644
index 643be2c..0000000
--- a/src/packet/packet_builder.h
+++ /dev/null
@@ -1,14 +0,0 @@
-#pragma once
-
-#ifdef __cplusplus
-extern "C"
-{
-#endif
-
-#include <stdint.h>
-
-void append_fingerprint_to_build_packet();
-
-#ifdef __cplusplus
-}
-#endif
diff --git a/src/packet/packet_ldbc.cpp b/src/packet/packet_ldbc.cpp
deleted file mode 100644
index 1e84953..0000000
--- a/src/packet/packet_ldbc.cpp
+++ /dev/null
@@ -1,121 +0,0 @@
-#include "tuple.h"
-#include "uthash.h"
-#include "packet_ldbc.h"
-#include "packet_private.h"
-uint64_t packet_ldbc_hash(const struct packet *pkt, enum load_balance ldbc, enum packet_direction 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 (pkt == NULL)
-    {
-        return hash_value;
-    }
-
-    if (packet_get_innermost_tuple2(pkt, &inner_addr) == -1)
-    {
-        return hash_value;
-    }
-
-    if (packet_get_outermost_tuple2(pkt, &outer_addr) == -1)
-    {
-        return hash_value;
-    }
-
-    if (inner_addr.addr_family == AF_INET)
-    {
-        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.addr_family == AF_INET)
-    {
-        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 (ldbc)
-    {
-    case LDBC_HASH_OUTERMOST_INT_IP:
-        if (direction == PACKET_DIRECTION_INCOMING)
-        {
-            // 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_HASH_OUTERMOST_EXT_IP:
-        if (direction == PACKET_DIRECTION_INCOMING)
-        {
-            // 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_HASH_OUTERMOST_INT_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_HASH_INNERMOST_INT_IP:
-        if (direction == PACKET_DIRECTION_INCOMING)
-        {
-            // 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_HASH_INNERMOST_EXT_IP:
-        if (direction == PACKET_DIRECTION_INCOMING)
-        {
-            // 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;
-    }
-
-    return hash_value;
-}
\ No newline at end of file
diff --git a/src/packet/packet_ldbc.h b/src/packet/packet_ldbc.h
deleted file mode 100644
index 76d174f..0000000
--- a/src/packet/packet_ldbc.h
+++ /dev/null
@@ -1,25 +0,0 @@
-#pragma once
-
-#ifdef __cplusplus
-extern "C"
-{
-#endif
-
-#include <stdint.h>
-
-#include "stellar/packet.h"
-
-enum load_balance
-{
-    LDBC_HASH_OUTERMOST_INT_IP = 1,
-    LDBC_HASH_OUTERMOST_EXT_IP = 2,
-    LDBC_HASH_OUTERMOST_INT_EXT_IP = 3,
-    LDBC_HASH_INNERMOST_INT_IP = 4,
-    LDBC_HASH_INNERMOST_EXT_IP = 5,
-};
-
-uint64_t packet_ldbc_hash(const struct packet *pkt, enum load_balance ldbc, enum packet_direction direction);
-
-#ifdef __cplusplus
-}
-#endif
diff --git a/src/packet/packet_private.h b/src/packet/packet_private.h
index 460c451..c823e6c 100644
--- a/src/packet/packet_private.h
+++ b/src/packet/packet_private.h
@@ -59,6 +59,15 @@ struct packet
     struct metadata meta;
 };
 
+enum packet_load_balance_method
+{
+    PKT_LDBC_METH_OUTERMOST_INT_IP = 1,
+    PKT_LDBC_METH_OUTERMOST_EXT_IP = 2,
+    PKT_LDBC_METH_OUTERMOST_INT_EXT_IP = 3,
+    PKT_LDBC_METH_INNERMOST_INT_IP = 4,
+    PKT_LDBC_METH_INNERMOST_EXT_IP = 5,
+};
+
 /******************************************************************************
  * metadata utils
  ******************************************************************************/
@@ -116,6 +125,12 @@ const struct raw_layer *packet_get_raw_layer(const struct packet *pkt, int idx);
 const struct raw_layer *packet_get_innermost_raw_layer(const struct packet *pkt, enum layer_proto proto);
 const struct raw_layer *packet_get_outermost_raw_layer(const struct packet *pkt, enum layer_proto proto);
 
+/******************************************************************************
+ * load balance uitls
+ ******************************************************************************/
+
+uint64_t packet_ldbc_hash(const struct packet *pkt, enum packet_load_balance_method method, enum packet_direction direction);
+
 /******************************************************************************
  * other uitls
  ******************************************************************************/
diff --git a/src/packet/test/gtest_packet_ldbc.cpp b/src/packet/test/gtest_packet_ldbc.cpp
index d4eb66d..ff80648 100644
--- a/src/packet/test/gtest_packet_ldbc.cpp
+++ b/src/packet/test/gtest_packet_ldbc.cpp
@@ -2,7 +2,6 @@
 #include <arpa/inet.h>
 
 #include "packet_private.h"
-#include "packet_ldbc.h"
 #include "packet_parser.h"
 #include "packet_dump.h"
 
@@ -82,11 +81,11 @@ TEST(PACKET_LDBC, HASH_VALUE)
 	// 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_ldbc_hash(&handler, LDBC_HASH_OUTERMOST_INT_IP, PACKET_DIRECTION_INCOMING) == packet_ldbc_hash(&handler, LDBC_HASH_OUTERMOST_EXT_IP, PACKET_DIRECTION_OUTGOING));
-	EXPECT_TRUE(packet_ldbc_hash(&handler, LDBC_HASH_OUTERMOST_EXT_IP, PACKET_DIRECTION_INCOMING) == packet_ldbc_hash(&handler, LDBC_HASH_OUTERMOST_INT_IP, PACKET_DIRECTION_OUTGOING));
+	EXPECT_TRUE(packet_ldbc_hash(&handler, PKT_LDBC_METH_OUTERMOST_INT_IP, PACKET_DIRECTION_INCOMING) == packet_ldbc_hash(&handler, PKT_LDBC_METH_OUTERMOST_EXT_IP, PACKET_DIRECTION_OUTGOING));
+	EXPECT_TRUE(packet_ldbc_hash(&handler, PKT_LDBC_METH_OUTERMOST_EXT_IP, PACKET_DIRECTION_INCOMING) == packet_ldbc_hash(&handler, PKT_LDBC_METH_OUTERMOST_INT_IP, PACKET_DIRECTION_OUTGOING));
 
-	EXPECT_TRUE(packet_ldbc_hash(&handler, LDBC_HASH_OUTERMOST_INT_EXT_IP, PACKET_DIRECTION_INCOMING) == packet_ldbc_hash(&handler, LDBC_HASH_OUTERMOST_INT_EXT_IP, PACKET_DIRECTION_OUTGOING));
-	EXPECT_TRUE(packet_ldbc_hash(&handler, LDBC_HASH_INNERMOST_INT_IP, PACKET_DIRECTION_INCOMING) == packet_ldbc_hash(&handler, LDBC_HASH_INNERMOST_EXT_IP, PACKET_DIRECTION_OUTGOING));
+	EXPECT_TRUE(packet_ldbc_hash(&handler, PKT_LDBC_METH_OUTERMOST_INT_EXT_IP, PACKET_DIRECTION_INCOMING) == packet_ldbc_hash(&handler, PKT_LDBC_METH_OUTERMOST_INT_EXT_IP, PACKET_DIRECTION_OUTGOING));
+	EXPECT_TRUE(packet_ldbc_hash(&handler, PKT_LDBC_METH_INNERMOST_INT_IP, PACKET_DIRECTION_INCOMING) == packet_ldbc_hash(&handler, PKT_LDBC_METH_INNERMOST_EXT_IP, PACKET_DIRECTION_OUTGOING));
 }
 #endif
 
diff --git a/src/packet_io/dumpfile_io.cpp b/src/packet_io/dumpfile_io.cpp
index 36d8925..54b45ae 100644
--- a/src/packet_io/dumpfile_io.cpp
+++ b/src/packet_io/dumpfile_io.cpp
@@ -14,7 +14,6 @@
 #include "utils.h"
 #include "dumpfile_io.h"
 #include "packet_private.h"
-#include "packet_ldbc.h"
 #include "packet_parser.h"
 #include "packet_dump.h"
 #include "lock_free_queue.h"
@@ -130,7 +129,7 @@ static void pcap_packet_handler(u_char *user, const struct pcap_pkthdr *h, const
     struct packet pkt;
     memset(&pkt, 0, sizeof(struct packet));
     packet_parse(&pkt, pcap_pkt->data, pcap_pkt->len);
-    uint64_t hash = packet_ldbc_hash(&pkt, LDBC_HASH_OUTERMOST_INT_EXT_IP, PACKET_DIRECTION_OUTGOING);
+    uint64_t hash = packet_ldbc_hash(&pkt, PKT_LDBC_METH_OUTERMOST_INT_EXT_IP, PACKET_DIRECTION_OUTGOING);
 
     // push packet to queue
     struct lock_free_queue *queue = handle->queue[hash % handle->nr_threads];