diff --git a/src/eviction_filter/eviction_filter.cpp b/src/eviction_filter/eviction_filter.cpp
index 845c4a4..27fc6e0 100644
--- a/src/eviction_filter/eviction_filter.cpp
+++ b/src/eviction_filter/eviction_filter.cpp
@@ -6,7 +6,7 @@
 #include "dablooms.h"
 #include "udp_utils.h"
 #include "ipv4_helpers.h"
-#include "ipv6_helpers.h"
+#include "ipv6_utils.h"
 #include "eviction_filter.h"
 
 struct eviction_filter_key
@@ -66,14 +66,14 @@ static inline int packet_get_eviction_filter_key(const struct packet *packet, st
     if (l3_layer->type == LAYER_TYPE_IPV4)
     {
         const struct ip *iphdr = (const struct ip *)l3_layer->hdr_ptr;
-        key->src_addr.v4 = ipv4_hdr_get_net_order_saddr(iphdr);
-        key->dst_addr.v4 = ipv4_hdr_get_net_order_daddr(iphdr);
+        key->src_addr.v4 = ipv4_hdr_get_src_in_addr(iphdr);
+        key->dst_addr.v4 = ipv4_hdr_get_dst_in_addr(iphdr);
     }
     if (l3_layer->type == LAYER_TYPE_IPV6)
     {
         const struct ip6_hdr *iphdr = (const struct ip6_hdr *)l3_layer->hdr_ptr;
-        key->src_addr.v6 = ipv6_hdr_get_net_order_saddr(iphdr);
-        key->dst_addr.v6 = ipv6_hdr_get_net_order_daddr(iphdr);
+        key->src_addr.v6 = ipv6_hdr_get_src_in6_addr(iphdr);
+        key->dst_addr.v6 = ipv6_hdr_get_dst_in6_addr(iphdr);
     }
 
     const struct udphdr *udphdr = (const struct udphdr *)l4_layer->hdr_ptr;
diff --git a/src/log/log.cpp b/src/log/log.cpp
index ab6ed8b..55f8e4e 100644
--- a/src/log/log.cpp
+++ b/src/log/log.cpp
@@ -31,7 +31,12 @@ struct log_context
     int log_file_reopen_day;
 };
 
-struct log_context g_log_context;
+struct log_context g_log_context = {
+    .config = {.output = LOG_OUTPUT_STDERR, .level = LOG_DEBUG},
+    .log_fd = -1,
+    .log_file_reopen_day = 0,
+};
+
 struct log_context *g_log_ctx = &g_log_context;
 
 static unsigned char weekday_str[7][4] = {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};
diff --git a/src/packet/ipv4_utils.h b/src/packet/ipv4_utils.h
index 761f222..3e53631 100644
--- a/src/packet/ipv4_utils.h
+++ b/src/packet/ipv4_utils.h
@@ -109,6 +109,16 @@ static inline uint32_t ipv4_hdr_get_dst_addr(const struct ip *hdr)
     return ntohl(hdr->ip_dst.s_addr);
 }
 
+static inline struct in_addr ipv4_hdr_get_src_in_addr(const struct ip *hdr)
+{
+    return hdr->ip_src;
+}
+
+static inline struct in_addr ipv4_hdr_get_dst_in_addr(const struct ip *hdr)
+{
+    return hdr->ip_dst;
+}
+
 static inline uint8_t ipv4_hdr_get_opt_len(const struct ip *hdr)
 {
     return ipv4_hdr_get_hdr_len(hdr) - sizeof(struct ip);
@@ -219,6 +229,16 @@ static inline void ipv4_hdr_set_dst_addr(struct ip *hdr, uint32_t daddr)
     hdr->ip_dst.s_addr = htonl(daddr);
 }
 
+static inline void ipv4_hdr_set_src_in_addr(struct ip *hdr, struct in_addr saddr)
+{
+    hdr->ip_src = saddr;
+}
+
+static inline void ipv4_hdr_set_dst_in_addr(struct ip *hdr, struct in_addr daddr)
+{
+    hdr->ip_dst = daddr;
+}
+
 static inline void ipv4_hdr_set_opt_len(struct ip *hdr, uint8_t opt_len)
 {
     ipv4_hdr_set_hdr_len(hdr, opt_len + sizeof(struct ip));
diff --git a/src/packet/ipv6_helpers.h b/src/packet/ipv6_utils.h
similarity index 59%
rename from src/packet/ipv6_helpers.h
rename to src/packet/ipv6_utils.h
index 689d7b9..7b27f80 100644
--- a/src/packet/ipv6_helpers.h
+++ b/src/packet/ipv6_utils.h
@@ -1,5 +1,5 @@
-#ifndef _IPV6_HELPERS_H
-#define _IPV6_HELPERS_H
+#ifndef _IPV6_UTILS_H
+#define _IPV6_UTILS_H
 
 #ifdef __cpluscplus
 extern "C"
@@ -37,6 +37,10 @@ extern "C"
  *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  */
 
+/******************************************************************************
+ * get
+ ******************************************************************************/
+
 static inline uint8_t ipv6_hdr_get_version(const struct ip6_hdr *hdr)
 {
     return (ntohl(hdr->ip6_flow) & 0xf0000000) >> 28;
@@ -67,18 +71,64 @@ static inline uint8_t ipv6_hdr_get_hop_limit(const struct ip6_hdr *hdr)
     return hdr->ip6_hlim;
 }
 
-static inline struct in6_addr ipv6_hdr_get_net_order_saddr(const struct ip6_hdr *hdr)
+static inline struct in6_addr ipv6_hdr_get_src_in6_addr(const struct ip6_hdr *hdr)
 {
     return hdr->ip6_src;
 }
 
-static inline struct in6_addr ipv6_hdr_get_net_order_daddr(const struct ip6_hdr *hdr)
+static inline struct in6_addr ipv6_hdr_get_dst_in6_addr(const struct ip6_hdr *hdr)
 {
     return hdr->ip6_dst;
 }
 
 // TODO IPv6 extension headers
 
+/******************************************************************************
+ * set
+ ******************************************************************************/
+
+static inline void ipv6_hdr_set_version(struct ip6_hdr *hdr, uint8_t version)
+{
+    hdr->ip6_flow = htonl((ntohl(hdr->ip6_flow) & 0x0fffffff) | (version << 28));
+}
+
+static inline void ipv6_hdr_set_traffic_class(struct ip6_hdr *hdr, uint8_t traffic_class)
+{
+    hdr->ip6_flow = htonl((ntohl(hdr->ip6_flow) & 0xf00fffff) | (traffic_class << 20));
+}
+
+static inline void ipv6_hdr_set_flow_label(struct ip6_hdr *hdr, uint32_t flow_label)
+{
+    hdr->ip6_flow = htonl((ntohl(hdr->ip6_flow) & 0xfff00000) | flow_label);
+}
+
+static inline void ipv6_hdr_set_payload_len(struct ip6_hdr *hdr, uint16_t payload_len)
+{
+    hdr->ip6_plen = htons(payload_len);
+}
+
+static inline void ipv6_hdr_set_next_header(struct ip6_hdr *hdr, uint8_t next_header)
+{
+    hdr->ip6_nxt = next_header;
+}
+
+static inline void ipv6_hdr_set_hop_limit(struct ip6_hdr *hdr, uint8_t hop_limit)
+{
+    hdr->ip6_hlim = hop_limit;
+}
+
+static inline void ipv6_hdr_set_src_in6_addr(struct ip6_hdr *hdr, struct in6_addr src_addr)
+{
+    hdr->ip6_src = src_addr;
+}
+
+static inline void ipv6_hdr_set_dst_in6_addr(struct ip6_hdr *hdr, struct in6_addr dst_addr)
+{
+    hdr->ip6_dst = dst_addr;
+}
+
+// TODO IPv6 extension headers
+
 #ifdef __cpluscplus
 }
 #endif
diff --git a/src/packet/packet.cpp b/src/packet/packet.cpp
index 472d1e2..a2019a0 100644
--- a/src/packet/packet.cpp
+++ b/src/packet/packet.cpp
@@ -13,6 +13,7 @@
 #include "udp_utils.h"
 #include "tcp_utils.h"
 #include "ipv4_utils.h"
+#include "ipv6_utils.h"
 
 #define likely(expr) __builtin_expect((expr), 1)
 #define unlikely(expr) __builtin_expect((expr), 0)
@@ -889,7 +890,7 @@ static inline const char *parse_ipv6(struct packet *handler, const char *data, u
     {
         return data;
     }
-    uint8_t next_proto = ((struct ip6_hdr *)data)->ip6_nxt;
+    uint8_t next_proto = ipv6_hdr_get_next_header((const struct ip6_hdr *)data);
     SET_LAYER(handler, layer, LAYER_TYPE_IPV6, sizeof(struct ip6_hdr), data, len);
 
     // TODO ipv6 fragment
diff --git a/src/packet/test/CMakeLists.txt b/src/packet/test/CMakeLists.txt
index 8b130fc..21bb118 100644
--- a/src/packet/test/CMakeLists.txt
+++ b/src/packet/test/CMakeLists.txt
@@ -14,8 +14,8 @@ target_link_libraries(gtest_tcp_utils packet gtest)
 add_executable(gtest_ipv4_utils gtest_ipv4_utils.cpp)
 target_link_libraries(gtest_ipv4_utils packet gtest)
 
-add_executable(gtest_ipv6_helpers gtest_ipv6_helpers.cpp)
-target_link_libraries(gtest_ipv6_helpers packet gtest)
+add_executable(gtest_ipv6_utils gtest_ipv6_utils.cpp)
+target_link_libraries(gtest_ipv6_utils packet gtest)
 
 add_executable(gtest_packet_helpers gtest_packet_helpers.cpp)
 target_link_libraries(gtest_packet_helpers packet gtest)
@@ -25,5 +25,5 @@ gtest_discover_tests(gtest_packet)
 gtest_discover_tests(gtest_udp_utils)
 gtest_discover_tests(gtest_tcp_utils)
 gtest_discover_tests(gtest_ipv4_utils)
-gtest_discover_tests(gtest_ipv6_helpers)
+gtest_discover_tests(gtest_ipv6_utils)
 gtest_discover_tests(gtest_packet_helpers)
\ No newline at end of file
diff --git a/src/packet/test/gtest_ipv6_helpers.cpp b/src/packet/test/gtest_ipv6_utils.cpp
similarity index 69%
rename from src/packet/test/gtest_ipv6_helpers.cpp
rename to src/packet/test/gtest_ipv6_utils.cpp
index a022e45..ec0b6c0 100644
--- a/src/packet/test/gtest_ipv6_helpers.cpp
+++ b/src/packet/test/gtest_ipv6_utils.cpp
@@ -1,6 +1,6 @@
 #include <gtest/gtest.h>
 
-#include "ipv6_helpers.h"
+#include "ipv6_utils.h"
 
 /*
  * Internet Protocol Version 6, Src: fe80::250:56ff:fe69:dc00, Dst: ff02::1:2
@@ -21,7 +21,7 @@ unsigned char data[] = {
     0x60, 0x00, 0x00, 0x00, 0x00, 0x3c, 0x11, 0x01, 0xfe, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x50, 0x56, 0xff, 0xfe, 0x69, 0xdc, 0x00, 0xff, 0x02,
     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x02};
 
-TEST(IPV6_HELPERS, TEST)
+TEST(IPV6_UTILS, GET)
 {
     char src_str[INET6_ADDRSTRLEN];
     char dst_str[INET6_ADDRSTRLEN];
@@ -32,14 +32,36 @@ TEST(IPV6_HELPERS, TEST)
     EXPECT_TRUE(ipv6_hdr_get_payload_len(hdr) == 60);
     EXPECT_TRUE(ipv6_hdr_get_next_header(hdr) == 17);
     EXPECT_TRUE(ipv6_hdr_get_hop_limit(hdr) == 1);
-    struct in6_addr src_addr = ipv6_hdr_get_net_order_saddr(hdr);
-    struct in6_addr dst_addr = ipv6_hdr_get_net_order_daddr(hdr);
+    struct in6_addr src_addr = ipv6_hdr_get_src_in6_addr(hdr);
+    struct in6_addr dst_addr = ipv6_hdr_get_dst_in6_addr(hdr);
+
     inet_ntop(AF_INET6, &src_addr, src_str, INET6_ADDRSTRLEN);
     inet_ntop(AF_INET6, &dst_addr, dst_str, INET6_ADDRSTRLEN);
     EXPECT_TRUE(strcmp(src_str, "fe80::250:56ff:fe69:dc00") == 0);
     EXPECT_TRUE(strcmp(dst_str, "ff02::1:2") == 0);
 }
 
+TEST(IPV6_UTILS, SET)
+{
+    char buff[40] = {0};
+    struct in6_addr src_addr;
+    struct in6_addr dst_addr;
+    struct ip6_hdr *hdr = (struct ip6_hdr *)buff;
+
+    inet_pton(AF_INET6, "fe80::250:56ff:fe69:dc00", &src_addr);
+    inet_pton(AF_INET6, "ff02::1:2", &dst_addr);
+    ipv6_hdr_set_version(hdr, 6);
+    ipv6_hdr_set_traffic_class(hdr, 0);
+    ipv6_hdr_set_flow_label(hdr, 0);
+    ipv6_hdr_set_payload_len(hdr, 60);
+    ipv6_hdr_set_next_header(hdr, 17);
+    ipv6_hdr_set_hop_limit(hdr, 1);
+    ipv6_hdr_set_src_in6_addr(hdr, src_addr);
+    ipv6_hdr_set_dst_in6_addr(hdr, dst_addr);
+
+    EXPECT_TRUE(memcmp(buff, data, 40) == 0);
+}
+
 int main(int argc, char **argv)
 {
     ::testing::InitGoogleTest(&argc, argv);
diff --git a/src/session/test/test_utils.h b/src/session/test/test_utils.h
index 6211a19..115f873 100644
--- a/src/session/test/test_utils.h
+++ b/src/session/test/test_utils.h
@@ -11,8 +11,8 @@ extern "C"
 #include "session_private.h"
 #include "timestamp.h"
 #include "session_manager.h"
-#include "ipv4_helpers.h"
-#include "tcp_helpers.h"
+#include "tcp_utils.h"
+#include "ipv4_utils.h"
 #include "test_packets.h"
 
 struct session_manager_config config = {