diff --git a/include/stellar/packet.h b/include/stellar/packet.h
index 91639e4..87d9ad6 100644
--- a/include/stellar/packet.h
+++ b/include/stellar/packet.h
@@ -81,7 +81,7 @@ enum packet_direction packet_get_direction(const struct packet *pkt);
 uint64_t packet_get_session_id(const struct packet *pkt);
 void packet_prepend_sid_list(struct packet *pkt, const struct sid_list *list);
 
-int8_t packet_get_layers_number(const struct packet *pkt);
+int8_t packet_get_layer_count(const struct packet *pkt);
 const struct packet_layer *packet_get_layer(const struct packet *pkt, int8_t idx);
 
 const char *packet_get_data(const struct packet *pkt);
@@ -93,27 +93,6 @@ uint16_t packet_get_payload_len(const struct packet *pkt);
 void packet_set_action(struct packet *pkt, enum packet_action action);
 enum packet_action packet_get_action(const struct packet *pkt);
 
-/*
- ******************************************************************************
- * Example: foreach layer in packet
- ******************************************************************************
- *
- *    // inorder
- *    int8_t layers = packet_get_layers_number(pkt);
- *    for (int8_t i = 0; i < layers; i++)
- *    {
- *        const struct packet_layer *layer = packet_get_layer(pkt, i);
- *        printf("layer[%d]: type=%d, hdr_offset=%d, hdr_len=%d, pld_len=%d\n", i, layer->type, layer->hdr_offset, layer->hdr_len, layer->pld_len);
- *    }
- *
- *    // reverse
- *    for (int8_t i = layers - 1; i >= 0; i--)
- *    {
- *        const struct packet_layer *layer = packet_get_layer(pkt, i);
- *        printf("layer[%d]: type=%d, hdr_offset=%d, hdr_len=%d, pld_len=%d\n", i, layer->type, layer->hdr_offset, layer->hdr_len, layer->pld_len);
- *    }
- */
-
 struct address
 {
     uint8_t family; // AF_INET or AF_INET6
@@ -129,7 +108,7 @@ static inline int packet_get_addr(const struct packet *pkt, struct address *src_
     const struct ip *ip4_hdr = NULL;
     const struct ip6_hdr *ip6_hdr = NULL;
     const struct packet_layer *layer = NULL;
-    int8_t num = packet_get_layers_number(pkt);
+    int8_t num = packet_get_layer_count(pkt);
     for (int8_t i = num - 1; i >= 0; i--)
     {
         layer = packet_get_layer(pkt, i);
@@ -173,7 +152,7 @@ static inline int packet_get_port(const struct packet *pkt, uint16_t *src_port,
     const struct tcphdr *tcp_hdr = NULL;
     const struct udphdr *udp_hdr = NULL;
     const struct packet_layer *layer = NULL;
-    int8_t num = packet_get_layers_number(pkt);
+    int8_t num = packet_get_layer_count(pkt);
     for (int8_t i = num - 1; i >= 0; i--)
     {
         layer = packet_get_layer(pkt, i);
@@ -196,86 +175,6 @@ static inline int packet_get_port(const struct packet *pkt, uint16_t *src_port,
     return -1;
 }
 
-static inline int packet_get_ip_hdr(const struct packet *pkt, struct ip *hdr)
-{
-    const struct packet_layer *layer = NULL;
-    int8_t num = packet_get_layers_number(pkt);
-    for (int8_t i = num - 1; i >= 0; i--)
-    {
-        layer = packet_get_layer(pkt, i);
-        if (layer->type == LAYER_PROTO_IPV4)
-        {
-            if (hdr != NULL)
-            {
-                memcpy(hdr, layer->hdr_ptr, sizeof(struct ip));
-            }
-            return 0;
-        }
-    }
-
-    return -1;
-}
-
-static inline int packet_get_ip6_hdr(const struct packet *pkt, struct ip6_hdr *hdr)
-{
-    const struct packet_layer *layer = NULL;
-    int8_t num = packet_get_layers_number(pkt);
-    for (int8_t i = num - 1; i >= 0; i--)
-    {
-        layer = packet_get_layer(pkt, i);
-        if (layer->type == LAYER_PROTO_IPV6)
-        {
-            if (hdr != NULL)
-            {
-                memcpy(hdr, layer->hdr_ptr, sizeof(struct ip6_hdr));
-            }
-            return 0;
-        }
-    }
-
-    return -1;
-}
-
-static inline int packet_get_tcp_hdr(const struct packet *pkt, struct tcphdr *hdr)
-{
-    const struct packet_layer *layer = NULL;
-    int8_t num = packet_get_layers_number(pkt);
-    for (int8_t i = num - 1; i >= 0; i--)
-    {
-        layer = packet_get_layer(pkt, i);
-        if (layer->type == LAYER_PROTO_TCP)
-        {
-            if (hdr != NULL)
-            {
-                memcpy(hdr, layer->hdr_ptr, sizeof(struct tcphdr));
-            }
-            return 0;
-        }
-    }
-
-    return -1;
-}
-
-static inline int packet_get_udp_hdr(const struct packet *pkt, struct udphdr *hdr)
-{
-    const struct packet_layer *layer = NULL;
-    int8_t num = packet_get_layers_number(pkt);
-    for (int8_t i = num - 1; i >= 0; i--)
-    {
-        layer = packet_get_layer(pkt, i);
-        if (layer->type == LAYER_PROTO_UDP)
-        {
-            if (hdr != NULL)
-            {
-                memcpy(hdr, layer->hdr_ptr, sizeof(struct udphdr));
-            }
-            return 0;
-        }
-    }
-
-    return -1;
-}
-
 #ifdef __cplusplus
 }
 #endif
diff --git a/src/packet/packet_utils.cpp b/src/packet/packet_utils.cpp
index 22a274d..2aa0708 100644
--- a/src/packet/packet_utils.cpp
+++ b/src/packet/packet_utils.cpp
@@ -23,7 +23,7 @@ enum packet_origin packet_get_origin(const struct packet *pkt)
     return pkt->origin;
 }
 
-int8_t packet_get_layers_number(const struct packet *pkt)
+int8_t packet_get_layer_count(const struct packet *pkt)
 {
     return pkt->layers_used;
 }
diff --git a/src/stellar/inject.cpp b/src/stellar/inject.cpp
index da07897..30871db 100644
--- a/src/stellar/inject.cpp
+++ b/src/stellar/inject.cpp
@@ -236,7 +236,7 @@ static int build_tcp_packet(const struct packet *first, uint16_t ip_id, uint8_t
     struct packet_layer *curr;
     struct packet_layer *last;
     int len = packet_get_len(first);
-    int8_t layers = packet_get_layers_number(first);
+    int8_t layers = packet_get_layer_count(first);
 
     if ((tcp_pld == NULL && pld_len > 0) || (tcp_pld != NULL && pld_len <= 0))
     {
@@ -323,7 +323,7 @@ static int build_udp_packet(const struct packet *first, const char *udp_pld, int
     struct packet_layer *curr;
     struct packet_layer *last;
     int len = packet_get_len(first);
-    int8_t layers = packet_get_layers_number(first);
+    int8_t layers = packet_get_layer_count(first);
 
     if ((udp_pld == NULL && pld_len > 0) || (udp_pld != NULL && pld_len <= 0))
     {
diff --git a/src/stellar/version.map b/src/stellar/version.map
index f30c404..c97eb7e 100644
--- a/src/stellar/version.map
+++ b/src/stellar/version.map
@@ -3,7 +3,7 @@ global:
 	packet_get_direction;
 	packet_get_session_id;
 	packet_prepend_sid_list;
-	packet_get_layers_number;
+	packet_get_layer_count;
 	packet_get_layer;
 	packet_get_data;
 	packet_get_len;
@@ -13,10 +13,6 @@ global:
 	packet_get_action;
 	packet_get_addr;
 	packet_get_port;
-	packet_get_ip_hdr;
-	packet_get_ip6_hdr;
-	packet_get_tcp_hdr;
-	packet_get_udp_hdr;
 
 	session_exdata_free;
 	stellar_session_exdata_new_index;
diff --git a/test/packet_parser/packet_parser.cpp b/test/packet_parser/packet_parser.cpp
index 8ea4589..6fbad5f 100644
--- a/test/packet_parser/packet_parser.cpp
+++ b/test/packet_parser/packet_parser.cpp
@@ -89,7 +89,7 @@ static void packet_to_tshark_format(const struct packet *pkt, uint64_t idx)
     char tmp_src_buff[256] = {0};
     char tmp_dst_buff[256] = {0};
 
-    int8_t num = packet_get_layers_number(pkt);
+    int8_t num = packet_get_layer_count(pkt);
     for (int8_t i = 0; i < num; i++)
     {
         memset(tmp_src_buff, 0, sizeof(tmp_src_buff));