// TCP state machine test: active -> closing
#include <gtest/gtest.h>

#include "tuple.h"
#include "packet_private.h"
#include "packet_parser.h"
#include "session_private.h"
#include "default_config.h"
#include "test_packets.h"

static uint64_t session_id_generator(uint64_t now_ms __attribute__((unused)))
{
    static uint64_t count = 0;
    return (++count);
}

static void build_active_tcp_session(struct session_manager *mgr, struct session *sess)
{
    struct packet pkt;

    // C2S SYN Packet
    printf("\n=> Packet Parse: TCP C2S SYN packet\n");
    memset(&pkt, 0, sizeof(pkt));
    packet_parse(&pkt, (const char *)tcp_pkt1_c2s_syn, sizeof(tcp_pkt1_c2s_syn));
    printf("<= Packet Parse: done\n\n");

    // lookup session
    EXPECT_TRUE(session_manager_lookup_session_by_packet(mgr, &pkt) == NULL);
    // new session
    sess = session_manager_new_session(mgr, &pkt, 1);
    EXPECT_TRUE(sess);

    // C2S DATA Packet
    printf("\n=> Packet Parse: TCP C2S DATA packet\n");
    memset(&pkt, 0, sizeof(pkt));
    packet_parse(&pkt, (const char *)tcp_pkt4_c2s_http_req, sizeof(tcp_pkt4_c2s_http_req));
    printf("<= Packet Parse: done\n\n");

    // lookup session
    sess = session_manager_lookup_session_by_packet(mgr, &pkt);
    EXPECT_TRUE(sess);
    // update session
    EXPECT_TRUE(session_manager_update_session(mgr, sess, &pkt, 2) == 0);
}

/******************************************************************************
 * case: TCP active -> closing (by FIN-FIN)
 ******************************************************************************/

#if 1
TEST(TCP_ACTIVE_TO_CLOSING, BY_FIN_FIN)
{
    char buffer[1024] = {0};
    struct packet pkt;
    struct session *sess = NULL;
    struct session_manager *mgr = NULL;
    struct session_manager_stat *stat = NULL;

    mgr = session_manager_new(&cfg, 1);
    EXPECT_TRUE(mgr != NULL);
    session_manager_set_session_id_generator(mgr, session_id_generator);

    // C2S SYN Packet & C2S DATA Packet
    build_active_tcp_session(mgr, sess);

    // C2S FIN Packet
    printf("\n=> Packet Parse: TCP C2S FIN packet\n");
    memset(&pkt, 0, sizeof(pkt));
    packet_parse(&pkt, (const char *)tcp_pkt9_c2s_fin, sizeof(tcp_pkt9_c2s_fin));
    printf("<= Packet Parse: done\n\n");

    // lookup session
    sess = session_manager_lookup_session_by_packet(mgr, &pkt);
    EXPECT_TRUE(sess);
    // update session
    EXPECT_TRUE(session_manager_update_session(mgr, sess, &pkt, 3) == 0);

    // S2C FIN Packet
    printf("\n=> Packet Parse: TCP S2C FIN packet\n");
    memset(&pkt, 0, sizeof(pkt));
    packet_parse(&pkt, (const char *)tcp_pkt10_s2c_fin, sizeof(tcp_pkt10_s2c_fin));
    printf("<= Packet Parse: done\n\n");

    // lookup session
    sess = session_manager_lookup_session_by_packet(mgr, &pkt);
    EXPECT_TRUE(sess);
    // update session
    EXPECT_TRUE(session_manager_update_session(mgr, sess, &pkt, 3) == 0);

    EXPECT_TRUE(session_get_id(sess) != 0);
    tuple6_to_str(session_get_tuple6(sess), buffer, sizeof(buffer));
    EXPECT_STREQ(buffer, "192.168.38.105:60111-93.184.216.34:80-6-0");
    EXPECT_TRUE(session_get_current_state(sess) == SESSION_STATE_CLOSING);
    EXPECT_TRUE(session_get_type(sess) == SESSION_TYPE_TCP);
    EXPECT_TRUE(session_has_duplicate_traffic(sess) == 0);
    EXPECT_TRUE(session_get_closing_reason(sess) == CLOSING_BY_CLIENT_FIN);
    EXPECT_TRUE(session_get_stat(sess, FLOW_DIRECTION_C2S, STAT_RAW_BYTES_RECEIVED) == 78 + 145 + 66);
    EXPECT_TRUE(session_get_stat(sess, FLOW_DIRECTION_S2C, STAT_RAW_BYTES_RECEIVED) == 66);
    EXPECT_TRUE(session_get_stat(sess, FLOW_DIRECTION_C2S, STAT_RAW_PACKETS_RECEIVED) == 1 + 1 + 1);
    EXPECT_TRUE(session_get_stat(sess, FLOW_DIRECTION_S2C, STAT_RAW_PACKETS_RECEIVED) == 1);
    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START));
    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST));
    EXPECT_TRUE(session_get0_current_packet(sess) == &pkt);
    EXPECT_TRUE(session_get_current_flow_direction(sess) == FLOW_DIRECTION_S2C);
    EXPECT_TRUE(session_get_first_packet(sess, FLOW_DIRECTION_C2S) != NULL);
    EXPECT_TRUE(session_get_first_packet(sess, FLOW_DIRECTION_S2C) != NULL);
    session_print(sess);

    // check stat
    stat = session_manager_stat(mgr);
    EXPECT_TRUE(stat);
    EXPECT_TRUE(stat->tcp_sess_used == 1);
    EXPECT_TRUE(stat->tcp_sess_opening == 0);
    EXPECT_TRUE(stat->tcp_sess_active == 0);
    EXPECT_TRUE(stat->tcp_sess_closing == 1);

    // expire session
    sess = session_manager_get_expired_session(mgr, 3 + cfg.tcp_timeout_ms.time_wait);
    EXPECT_TRUE(sess);
    EXPECT_TRUE(session_get_current_state(sess) == SESSION_STATE_CLOSED);
    EXPECT_TRUE(session_get_closing_reason(sess) == CLOSING_BY_CLIENT_FIN);
    session_print(sess);
    // free session
    session_manager_free_session(mgr, sess);

    // check stat
    stat = session_manager_stat(mgr);
    EXPECT_TRUE(stat);
    EXPECT_TRUE(stat->tcp_sess_used == 0);
    EXPECT_TRUE(stat->tcp_sess_opening == 0);
    EXPECT_TRUE(stat->tcp_sess_active == 0);
    EXPECT_TRUE(stat->tcp_sess_closing == 0);

    session_manager_free(mgr);
}
#endif

/******************************************************************************
 * case: TCP active -> closing (by C2S RST)
 ******************************************************************************/

#if 1
TEST(TCP_ACTIVE_TO_CLOSING, BY_C2S_RST)
{
    char buffer[1024] = {0};
    struct packet pkt;
    struct session *sess = NULL;
    struct session_manager *mgr = NULL;
    struct session_manager_stat *stat = NULL;

    mgr = session_manager_new(&cfg, 1);
    EXPECT_TRUE(mgr != NULL);
    session_manager_set_session_id_generator(mgr, session_id_generator);

    // C2S SYN Packet & C2S DATA Packet
    build_active_tcp_session(mgr, sess);

    // C2S RST Packet
    printf("\n=> Packet Parse: TCP C2S RST packet\n");
    char tcp_pkt_c2s_rst[1500] = {0};
    memcpy(tcp_pkt_c2s_rst, tcp_pkt9_c2s_fin, sizeof(tcp_pkt9_c2s_fin));
    memset(&pkt, 0, sizeof(pkt));
    packet_parse(&pkt, (const char *)tcp_pkt_c2s_rst, sizeof(tcp_pkt9_c2s_fin));
    const struct layer_private *tcp_layer = packet_get_innermost_layer(&pkt, LAYER_PROTO_TCP);
    EXPECT_TRUE(tcp_layer);
    struct tcphdr *hdr = (struct tcphdr *)tcp_layer->hdr_ptr;
    hdr->th_flags = TH_RST;
    printf("<= Packet Parse: done\n\n");

    // lookup session
    sess = session_manager_lookup_session_by_packet(mgr, &pkt);
    EXPECT_TRUE(sess);
    // update session
    EXPECT_TRUE(session_manager_update_session(mgr, sess, &pkt, 3) == 0);

    EXPECT_TRUE(session_get_id(sess) != 0);
    tuple6_to_str(session_get_tuple6(sess), buffer, sizeof(buffer));
    EXPECT_STREQ(buffer, "192.168.38.105:60111-93.184.216.34:80-6-0");
    EXPECT_TRUE(session_get_current_state(sess) == SESSION_STATE_CLOSING);
    EXPECT_TRUE(session_get_type(sess) == SESSION_TYPE_TCP);
    EXPECT_TRUE(session_has_duplicate_traffic(sess) == 0);
    EXPECT_TRUE(session_get_closing_reason(sess) == CLOSING_BY_CLIENT_RST);
    EXPECT_TRUE(session_get_stat(sess, FLOW_DIRECTION_C2S, STAT_RAW_BYTES_RECEIVED) == 78 + 145 + 66);
    EXPECT_TRUE(session_get_stat(sess, FLOW_DIRECTION_S2C, STAT_RAW_BYTES_RECEIVED) == 0);
    EXPECT_TRUE(session_get_stat(sess, FLOW_DIRECTION_C2S, STAT_RAW_PACKETS_RECEIVED) == 1 + 1 + 1);
    EXPECT_TRUE(session_get_stat(sess, FLOW_DIRECTION_S2C, STAT_RAW_PACKETS_RECEIVED) == 0);
    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START));
    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST));
    EXPECT_TRUE(session_get0_current_packet(sess) == &pkt);
    EXPECT_TRUE(session_get_current_flow_direction(sess) == FLOW_DIRECTION_C2S);
    EXPECT_TRUE(session_get_first_packet(sess, FLOW_DIRECTION_C2S) != NULL);
    EXPECT_TRUE(session_get_first_packet(sess, FLOW_DIRECTION_S2C) == NULL);
    session_print(sess);

    // check stat
    stat = session_manager_stat(mgr);
    EXPECT_TRUE(stat);
    EXPECT_TRUE(stat->tcp_sess_used == 1);
    EXPECT_TRUE(stat->tcp_sess_opening == 0);
    EXPECT_TRUE(stat->tcp_sess_active == 0);
    EXPECT_TRUE(stat->tcp_sess_closing == 1);

    // expire session
    sess = session_manager_get_expired_session(mgr, 3 + cfg.tcp_timeout_ms.unverified_rst);
    EXPECT_TRUE(sess);
    EXPECT_TRUE(session_get_current_state(sess) == SESSION_STATE_CLOSED);
    EXPECT_TRUE(session_get_closing_reason(sess) == CLOSING_BY_CLIENT_RST);
    session_print(sess);
    // free session
    session_manager_free_session(mgr, sess);

    // check stat
    stat = session_manager_stat(mgr);
    EXPECT_TRUE(stat);
    EXPECT_TRUE(stat->tcp_sess_used == 0);
    EXPECT_TRUE(stat->tcp_sess_opening == 0);
    EXPECT_TRUE(stat->tcp_sess_active == 0);
    EXPECT_TRUE(stat->tcp_sess_closing == 0);

    session_manager_free(mgr);
}
#endif

/******************************************************************************
 * case: TCP active -> closing (by S2C RST)
 ******************************************************************************/

#if 1
TEST(TCP_ACTIVE_TO_CLOSING, BY_S2C_RST)
{
    char buffer[1024] = {0};
    struct packet pkt;
    struct session *sess = NULL;
    struct session_manager *mgr = NULL;
    struct session_manager_stat *stat = NULL;

    mgr = session_manager_new(&cfg, 1);
    EXPECT_TRUE(mgr != NULL);
    session_manager_set_session_id_generator(mgr, session_id_generator);

    // C2S SYN Packet & C2S DATA Packet
    build_active_tcp_session(mgr, sess);

    // S2C RST Packet
    printf("\n=> Packet Parse: TCP S2C RST packet\n");
    char tcp_pkt_s2c_rst[1500] = {0};
    memcpy(tcp_pkt_s2c_rst, tcp_pkt10_s2c_fin, sizeof(tcp_pkt10_s2c_fin));
    memset(&pkt, 0, sizeof(pkt));
    packet_parse(&pkt, (const char *)tcp_pkt_s2c_rst, sizeof(tcp_pkt10_s2c_fin));
    const struct layer_private *tcp_layer = packet_get_innermost_layer(&pkt, LAYER_PROTO_TCP);
    EXPECT_TRUE(tcp_layer);
    struct tcphdr *hdr = (struct tcphdr *)tcp_layer->hdr_ptr;
    hdr->th_flags = TH_RST;
    printf("<= Packet Parse: done\n\n");

    // lookup session
    sess = session_manager_lookup_session_by_packet(mgr, &pkt);
    EXPECT_TRUE(sess);
    // update session
    EXPECT_TRUE(session_manager_update_session(mgr, sess, &pkt, 3) == 0);

    EXPECT_TRUE(session_get_id(sess) != 0);
    tuple6_to_str(session_get_tuple6(sess), buffer, sizeof(buffer));
    EXPECT_STREQ(buffer, "192.168.38.105:60111-93.184.216.34:80-6-0");
    EXPECT_TRUE(session_get_current_state(sess) == SESSION_STATE_CLOSING);
    EXPECT_TRUE(session_get_type(sess) == SESSION_TYPE_TCP);
    EXPECT_TRUE(session_has_duplicate_traffic(sess) == 0);
    EXPECT_TRUE(session_get_closing_reason(sess) == CLOSING_BY_SERVER_RST);
    EXPECT_TRUE(session_get_stat(sess, FLOW_DIRECTION_C2S, STAT_RAW_BYTES_RECEIVED) == 78 + 145);
    EXPECT_TRUE(session_get_stat(sess, FLOW_DIRECTION_S2C, STAT_RAW_BYTES_RECEIVED) == 66);
    EXPECT_TRUE(session_get_stat(sess, FLOW_DIRECTION_C2S, STAT_RAW_PACKETS_RECEIVED) == 1 + 1);
    EXPECT_TRUE(session_get_stat(sess, FLOW_DIRECTION_S2C, STAT_RAW_PACKETS_RECEIVED) == 1);
    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START));
    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST));
    EXPECT_TRUE(session_get0_current_packet(sess) == &pkt);
    EXPECT_TRUE(session_get_current_flow_direction(sess) == FLOW_DIRECTION_S2C);
    EXPECT_TRUE(session_get_first_packet(sess, FLOW_DIRECTION_C2S) != NULL);
    EXPECT_TRUE(session_get_first_packet(sess, FLOW_DIRECTION_S2C) != NULL);
    session_print(sess);

    // check stat
    stat = session_manager_stat(mgr);
    EXPECT_TRUE(stat);
    EXPECT_TRUE(stat->tcp_sess_used == 1);
    EXPECT_TRUE(stat->tcp_sess_opening == 0);
    EXPECT_TRUE(stat->tcp_sess_active == 0);
    EXPECT_TRUE(stat->tcp_sess_closing == 1);

    // expire session
    sess = session_manager_get_expired_session(mgr, 3 + cfg.tcp_timeout_ms.unverified_rst);
    EXPECT_TRUE(sess);
    EXPECT_TRUE(session_get_current_state(sess) == SESSION_STATE_CLOSED);
    EXPECT_TRUE(session_get_closing_reason(sess) == CLOSING_BY_SERVER_RST);
    session_print(sess);
    // free session
    session_manager_free_session(mgr, sess);

    // check stat
    stat = session_manager_stat(mgr);
    EXPECT_TRUE(stat);
    EXPECT_TRUE(stat->tcp_sess_used == 0);
    EXPECT_TRUE(stat->tcp_sess_opening == 0);
    EXPECT_TRUE(stat->tcp_sess_active == 0);
    EXPECT_TRUE(stat->tcp_sess_closing == 0);

    session_manager_free(mgr);
}
#endif

/******************************************************************************
 * case: TCP active -> closing (by date timeout)
 ******************************************************************************/

#if 1
TEST(TCP_ACTIVE_TO_CLOSING, BY_DATA_TIMEOUT)
{
    struct session *sess = NULL;
    struct session_manager *mgr = NULL;
    struct session_manager_stat *stat = NULL;

    mgr = session_manager_new(&cfg, 1);
    EXPECT_TRUE(mgr != NULL);
    session_manager_set_session_id_generator(mgr, session_id_generator);

    // C2S SYN Packet & C2S DATA Packet
    build_active_tcp_session(mgr, sess);

    // check stat
    stat = session_manager_stat(mgr);
    EXPECT_TRUE(stat);
    EXPECT_TRUE(stat->tcp_sess_used == 1);
    EXPECT_TRUE(stat->tcp_sess_opening == 0);
    EXPECT_TRUE(stat->tcp_sess_active == 1);
    EXPECT_TRUE(stat->tcp_sess_closing == 0);

    // expire session
    EXPECT_TRUE(session_manager_get_expired_session(mgr, 2 + cfg.tcp_timeout_ms.data) == NULL);
    sess = session_manager_get_expired_session(mgr, 2 + cfg.tcp_timeout_ms.data + cfg.tcp_timeout_ms.data);
    EXPECT_TRUE(sess);
    EXPECT_TRUE(session_get_current_state(sess) == SESSION_STATE_CLOSED);
    EXPECT_TRUE(session_get_closing_reason(sess) == CLOSING_BY_TIMEOUT);
    session_print(sess);
    // free session
    session_manager_free_session(mgr, sess);

    // check stat
    stat = session_manager_stat(mgr);
    EXPECT_TRUE(stat);
    EXPECT_TRUE(stat->tcp_sess_used == 0);
    EXPECT_TRUE(stat->tcp_sess_opening == 0);
    EXPECT_TRUE(stat->tcp_sess_active == 0);
    EXPECT_TRUE(stat->tcp_sess_closing == 0);

    session_manager_free(mgr);
}
#endif

/******************************************************************************
 * case: TCP active -> closing (by C2S half closed timeout)
 ******************************************************************************/

#if 1
TEST(TCP_ACTIVE_TO_CLOSING, BY_C2S_HALF_CLOSED_TIMEOUT)
{
    char buffer[1024] = {0};
    struct packet pkt;
    struct session *sess = NULL;
    struct session_manager *mgr = NULL;
    struct session_manager_stat *stat = NULL;

    mgr = session_manager_new(&cfg, 1);
    EXPECT_TRUE(mgr != NULL);
    session_manager_set_session_id_generator(mgr, session_id_generator);

    // C2S SYN Packet & C2S DATA Packet
    build_active_tcp_session(mgr, sess);

    // C2S FIN Packet
    printf("\n=> Packet Parse: TCP C2S FIN packet\n");
    memset(&pkt, 0, sizeof(pkt));
    packet_parse(&pkt, (const char *)tcp_pkt9_c2s_fin, sizeof(tcp_pkt9_c2s_fin));
    printf("<= Packet Parse: done\n\n");

    // lookup session
    sess = session_manager_lookup_session_by_packet(mgr, &pkt);
    EXPECT_TRUE(sess);
    // update session
    EXPECT_TRUE(session_manager_update_session(mgr, sess, &pkt, 3) == 0);

    EXPECT_TRUE(session_get_id(sess) != 0);
    tuple6_to_str(session_get_tuple6(sess), buffer, sizeof(buffer));
    EXPECT_STREQ(buffer, "192.168.38.105:60111-93.184.216.34:80-6-0");
    EXPECT_TRUE(session_get_current_state(sess) == SESSION_STATE_CLOSING);
    EXPECT_TRUE(session_get_type(sess) == SESSION_TYPE_TCP);
    EXPECT_TRUE(session_has_duplicate_traffic(sess) == 0);
    EXPECT_TRUE(session_get_closing_reason(sess) == CLOSING_BY_CLIENT_FIN);
    EXPECT_TRUE(session_get_stat(sess, FLOW_DIRECTION_C2S, STAT_RAW_BYTES_RECEIVED) == 78 + 145 + 66);
    EXPECT_TRUE(session_get_stat(sess, FLOW_DIRECTION_S2C, STAT_RAW_BYTES_RECEIVED) == 0);
    EXPECT_TRUE(session_get_stat(sess, FLOW_DIRECTION_C2S, STAT_RAW_PACKETS_RECEIVED) == 1 + 1 + 1);
    EXPECT_TRUE(session_get_stat(sess, FLOW_DIRECTION_S2C, STAT_RAW_PACKETS_RECEIVED) == 0);
    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START));
    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST));
    EXPECT_TRUE(session_get0_current_packet(sess) == &pkt);
    EXPECT_TRUE(session_get_current_flow_direction(sess) == FLOW_DIRECTION_C2S);
    EXPECT_TRUE(session_get_first_packet(sess, FLOW_DIRECTION_C2S) != NULL);
    EXPECT_TRUE(session_get_first_packet(sess, FLOW_DIRECTION_S2C) == NULL);
    session_print(sess);

    // check stat
    stat = session_manager_stat(mgr);
    EXPECT_TRUE(stat);
    EXPECT_TRUE(stat->tcp_sess_used == 1);
    EXPECT_TRUE(stat->tcp_sess_opening == 0);
    EXPECT_TRUE(stat->tcp_sess_active == 0);
    EXPECT_TRUE(stat->tcp_sess_closing == 1);

    // expire session
    sess = session_manager_get_expired_session(mgr, 3 + cfg.tcp_timeout_ms.half_closed);
    EXPECT_TRUE(sess);
    EXPECT_TRUE(session_get_current_state(sess) == SESSION_STATE_CLOSED);
    EXPECT_TRUE(session_get_closing_reason(sess) == CLOSING_BY_CLIENT_FIN);
    session_print(sess);
    // free session
    session_manager_free_session(mgr, sess);

    // check stat
    stat = session_manager_stat(mgr);
    EXPECT_TRUE(stat);
    EXPECT_TRUE(stat->tcp_sess_used == 0);
    EXPECT_TRUE(stat->tcp_sess_opening == 0);
    EXPECT_TRUE(stat->tcp_sess_active == 0);
    EXPECT_TRUE(stat->tcp_sess_closing == 0);

    session_manager_free(mgr);
}
#endif

/******************************************************************************
 * case: TCP active -> closing (by S2C half closed timeout)
 ******************************************************************************/

#if 1
TEST(TCP_ACTIVE_TO_CLOSING, BY_S2C_HALF_CLOSED_TIMEOUT)
{
    char buffer[1024] = {0};
    struct packet pkt;
    struct session *sess = NULL;
    struct session_manager *mgr = NULL;
    struct session_manager_stat *stat = NULL;

    mgr = session_manager_new(&cfg, 1);
    EXPECT_TRUE(mgr != NULL);
    session_manager_set_session_id_generator(mgr, session_id_generator);

    // C2S SYN Packet & C2S DATA Packet
    build_active_tcp_session(mgr, sess);

    // S2C FIN Packet
    printf("\n=> Packet Parse: TCP S2C FIN packet\n");
    memset(&pkt, 0, sizeof(pkt));
    packet_parse(&pkt, (const char *)tcp_pkt10_s2c_fin, sizeof(tcp_pkt10_s2c_fin));
    printf("<= Packet Parse: done\n\n");

    // lookup session
    sess = session_manager_lookup_session_by_packet(mgr, &pkt);
    EXPECT_TRUE(sess);
    // update session
    EXPECT_TRUE(session_manager_update_session(mgr, sess, &pkt, 3) == 0);

    EXPECT_TRUE(session_get_id(sess) != 0);
    tuple6_to_str(session_get_tuple6(sess), buffer, sizeof(buffer));
    EXPECT_STREQ(buffer, "192.168.38.105:60111-93.184.216.34:80-6-0");
    EXPECT_TRUE(session_get_current_state(sess) == SESSION_STATE_CLOSING);
    EXPECT_TRUE(session_get_type(sess) == SESSION_TYPE_TCP);
    EXPECT_TRUE(session_has_duplicate_traffic(sess) == 0);
    EXPECT_TRUE(session_get_closing_reason(sess) == CLOSING_BY_SERVER_FIN);
    EXPECT_TRUE(session_get_stat(sess, FLOW_DIRECTION_C2S, STAT_RAW_BYTES_RECEIVED) == 78 + 145);
    EXPECT_TRUE(session_get_stat(sess, FLOW_DIRECTION_S2C, STAT_RAW_BYTES_RECEIVED) == 66);
    EXPECT_TRUE(session_get_stat(sess, FLOW_DIRECTION_C2S, STAT_RAW_PACKETS_RECEIVED) == 1 + 1);
    EXPECT_TRUE(session_get_stat(sess, FLOW_DIRECTION_S2C, STAT_RAW_PACKETS_RECEIVED) == 1);
    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_START));
    EXPECT_TRUE(session_get_timestamp(sess, SESSION_TIMESTAMP_LAST));
    EXPECT_TRUE(session_get0_current_packet(sess) == &pkt);
    EXPECT_TRUE(session_get_current_flow_direction(sess) == FLOW_DIRECTION_S2C);
    EXPECT_TRUE(session_get_first_packet(sess, FLOW_DIRECTION_C2S) != NULL);
    EXPECT_TRUE(session_get_first_packet(sess, FLOW_DIRECTION_S2C) != NULL);
    session_print(sess);

    // check stat
    stat = session_manager_stat(mgr);
    EXPECT_TRUE(stat);
    EXPECT_TRUE(stat->tcp_sess_used == 1);
    EXPECT_TRUE(stat->tcp_sess_opening == 0);
    EXPECT_TRUE(stat->tcp_sess_active == 0);
    EXPECT_TRUE(stat->tcp_sess_closing == 1);

    // expire session
    sess = session_manager_get_expired_session(mgr, 3 + cfg.tcp_timeout_ms.half_closed);
    EXPECT_TRUE(sess);
    EXPECT_TRUE(session_get_current_state(sess) == SESSION_STATE_CLOSED);
    EXPECT_TRUE(session_get_closing_reason(sess) == CLOSING_BY_SERVER_FIN);
    session_print(sess);
    // free session
    session_manager_free_session(mgr, sess);

    // check stat
    stat = session_manager_stat(mgr);
    EXPECT_TRUE(stat);
    EXPECT_TRUE(stat->tcp_sess_used == 0);
    EXPECT_TRUE(stat->tcp_sess_opening == 0);
    EXPECT_TRUE(stat->tcp_sess_active == 0);
    EXPECT_TRUE(stat->tcp_sess_closing == 0);

    session_manager_free(mgr);
}
#endif

int main(int argc, char **argv)
{
    ::testing::InitGoogleTest(&argc, argv);
    return RUN_ALL_TESTS();
}