diff --git a/include/stellar/packet.h b/include/stellar/packet.h
index efd0be2..4e588b0 100644
--- a/include/stellar/packet.h
+++ b/include/stellar/packet.h
@@ -174,6 +174,9 @@ enum packet_action
 void packet_set_action(struct packet *pkt, enum packet_action action);
 enum packet_action packet_get_action(const struct packet *pkt);
 
+void packet_set_timeval(struct packet *pkt, const struct timeval *tv);
+const struct timeval *packet_get_timeval(const struct packet *pkt);
+
 const char *packet_get_raw_data(const struct packet *pkt);
 uint16_t packet_get_raw_len(const struct packet *pkt);
 
diff --git a/src/packet/packet_private.h b/src/packet/packet_private.h
index 27b1f6e..ead56b3 100644
--- a/src/packet/packet_private.h
+++ b/src/packet/packet_private.h
@@ -28,6 +28,7 @@ struct metadata
 
     enum packet_direction direction;
     enum packet_action action;
+    struct timeval tv;
     const void *origin_ctx;
 };
 
diff --git a/src/packet/packet_utils.cpp b/src/packet/packet_utils.cpp
index 2aef882..ec2bbe3 100644
--- a/src/packet/packet_utils.cpp
+++ b/src/packet/packet_utils.cpp
@@ -121,6 +121,16 @@ enum packet_action packet_get_action(const struct packet *pkt)
     return pkt->meta.action;
 }
 
+void packet_set_timeval(struct packet *pkt, const struct timeval *tv)
+{
+    pkt->meta.tv = *tv;
+}
+
+const struct timeval *packet_get_timeval(const struct packet *pkt)
+{
+    return &pkt->meta.tv;
+}
+
 void packet_set_user_data(struct packet *pkt, void *data)
 {
     pkt->user_data = data;
diff --git a/src/packet_io/dumpfile_io.cpp b/src/packet_io/dumpfile_io.cpp
index 0a6fb6d..cd60a33 100644
--- a/src/packet_io/dumpfile_io.cpp
+++ b/src/packet_io/dumpfile_io.cpp
@@ -40,6 +40,7 @@ struct pcap_pkt
 {
     char *data;
     int len;
+    struct timeval ts;
 };
 
 /******************************************************************************
@@ -142,6 +143,7 @@ static void pcap_pkt_handler(u_char *user, const struct pcap_pkthdr *h, const u_
     }
     pcap_pkt->data = (char *)pcap_pkt + sizeof(struct pcap_pkt);
     pcap_pkt->len = h->caplen;
+    pcap_pkt->ts = h->ts;
     memcpy((char *)pcap_pkt->data, bytes, h->caplen);
 
     // calculate packet hash
@@ -386,6 +388,7 @@ uint16_t dumpfile_io_ingress(struct dumpfile_io *handle, uint16_t thr_idx, struc
             memset(&pkt->meta, 0, sizeof(pkt->meta));
             packet_set_origin_ctx(pkt, pcap_pkt);
             packet_set_action(pkt, PACKET_ACTION_FORWARD);
+            packet_set_timeval(pkt, &pcap_pkt->ts);
             nr_parsed++;
         }
     }
diff --git a/src/packet_io/marsio_io.cpp b/src/packet_io/marsio_io.cpp
index 89f8b26..fb9de31 100644
--- a/src/packet_io/marsio_io.cpp
+++ b/src/packet_io/marsio_io.cpp
@@ -98,6 +98,10 @@ static void metadata_from_mbuff_to_packet(marsio_buff_t *mbuff, struct packet *p
 
     packet_set_action(pkt, PACKET_ACTION_FORWARD);
     packet_set_origin_ctx(pkt, mbuff);
+
+    // TODO
+    const struct timeval tv = {};
+    packet_set_timeval(pkt, &tv);
 }
 
 static void metadata_from_packet_to_mbuff(struct packet *pkt, marsio_buff_t *mbuff)
diff --git a/test/debug_plugin/debug_plugin.cpp b/test/debug_plugin/debug_plugin.cpp
index 6d6f85c..27c6a28 100644
--- a/test/debug_plugin/debug_plugin.cpp
+++ b/test/debug_plugin/debug_plugin.cpp
@@ -89,11 +89,11 @@ static void *on_sess_new(struct session *sess, void *plugin_ctx)
     if (session_get_type(sess) == SESSION_TYPE_TCP)
     {
         memset(buff, 0, sizeof(buff));
-        sprintf(buff, "./log/debug_plugin_%s_c2s_segment", session_get0_readable_addr(sess));
+        sprintf(buff, "./log/debug_plugin.log.c2s_segment_%s", session_get0_readable_addr(sess));
         ctx->c2s_tcp_seg_hexdump_fd = open(buff, O_WRONLY | O_APPEND | O_CREAT, 0644);
 
         memset(buff, 0, sizeof(buff));
-        sprintf(buff, "./log/debug_plugin_%s_s2c_segment", session_get0_readable_addr(sess));
+        sprintf(buff, "./log/debug_plugin.log.s2c_segment_%s", session_get0_readable_addr(sess));
         ctx->s2c_tcp_seg_hexdump_fd = open(buff, O_WRONLY | O_APPEND | O_CREAT, 0644);
     }
     session_exdata_set(sess, ctx->sess_exdata_idx, exdata);
@@ -142,7 +142,8 @@ static void on_sess_udp_msg(struct session *sess, int topic_id, const void *msg,
     }
 
     char buff[4096];
-    struct packet *pkt = (struct packet *)msg;
+    const struct packet *pkt = (const struct packet *)msg;
+    const struct timeval *tv = packet_get_timeval(pkt);
     struct plugin_ctx *ctx = (struct plugin_ctx *)plugin_ctx;
     struct session_exdata *exdata = (struct session_exdata *)session_exdata_get(sess, ctx->sess_exdata_idx);
     if (session_get_current_flow_direction(sess) == FLOW_DIRECTION_C2S)
@@ -162,7 +163,7 @@ static void on_sess_udp_msg(struct session *sess, int topic_id, const void *msg,
 
     memset(buff, 0, sizeof(buff));
     packet_dump_str(pkt, buff, sizeof(buff) - 1);
-    log_print(ctx->fd, "debug plugin", "rx UDP packet: \n%s", buff);
+    log_print(ctx->fd, "debug plugin", "rx UDP packet (tv_sec: %lu, tv_usec: %lu): \n%s", tv->tv_sec, tv->tv_usec, buff);
 
     pthread_spin_lock(&ctx->lock);
     packet_dump_hex(pkt, ctx->fd);
@@ -177,7 +178,8 @@ static void on_sess_tcp_msg(struct session *sess, int topic_id, const void *msg,
     }
 
     char buff[4096];
-    struct packet *pkt = (struct packet *)msg;
+    const struct packet *pkt = (const struct packet *)msg;
+    const struct timeval *tv = packet_get_timeval(pkt);
     struct plugin_ctx *ctx = (struct plugin_ctx *)plugin_ctx;
     struct session_exdata *exdata = (struct session_exdata *)session_exdata_get(sess, ctx->sess_exdata_idx);
     if (session_get_current_flow_direction(sess) == FLOW_DIRECTION_C2S)
@@ -197,7 +199,7 @@ static void on_sess_tcp_msg(struct session *sess, int topic_id, const void *msg,
 
     memset(buff, 0, sizeof(buff));
     packet_dump_str(pkt, buff, sizeof(buff) - 1);
-    log_print(ctx->fd, "debug plugin", "rx TCP packet: \n%s", buff);
+    log_print(ctx->fd, "debug plugin", "rx TCP packet (tv_sec: %lu, tv_usec: %lu): \n%s", tv->tv_sec, tv->tv_usec, buff);
 
     pthread_spin_lock(&ctx->lock);
     packet_dump_hex(pkt, ctx->fd);
@@ -212,7 +214,7 @@ static void on_sess_tcp_stream_msg(struct session *sess, int topic_id, const voi
     }
 
     char buff[4096];
-    struct tcp_segment *seg = (struct tcp_segment *)msg;
+    const struct tcp_segment *seg = (const struct tcp_segment *)msg;
     struct plugin_ctx *ctx = (struct plugin_ctx *)plugin_ctx;
     const char *data = tcp_segment_get_data(seg);
     uint16_t len = tcp_segment_get_len(seg);
@@ -258,7 +260,7 @@ extern "C"
             return NULL;
         }
 
-        ctx->fd = open("./log/debug_plugin_log", O_WRONLY | O_APPEND | O_CREAT, 0644);
+        ctx->fd = open("./log/debug_plugin.log", O_WRONLY | O_APPEND | O_CREAT, 0644);
         if (ctx->fd == -1)
         {
             printf("[debug plugin] open log file failed: %s\n", strerror(errno));