// TCP state machine test: init -> opening

#include "test_utils.h"

/******************************************************************************
 * case: TCP init -> opening (by SYN)
 ******************************************************************************/

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

    timestamp_update();

    mgr = session_manager_create(&config);
    EXPECT_TRUE(mgr != NULL);

    // C2S SYN Packet
    printf("=> packet parse: TCP C2S SYN packet\n");
    packet_parse(&pkt, (const char *)tcp_pkt1_c2s_syn, sizeof(tcp_pkt1_c2s_syn));
    printf("<= packet parse\n\n");
    sess = session_manager_update_session(mgr, &pkt);
    EXPECT_TRUE(sess);

    EXPECT_TRUE(session_get_id(sess) == 0);
    tuple6_tostring(session_get0_key(sess), buffer, sizeof(buffer));
    EXPECT_STREQ(buffer, "192.168.38.105:60111 -> 93.184.216.34:80, proto: 6, domain: 0");
    EXPECT_TRUE(session_get_key_dir(sess) == SESSION_DIR_C2S);
    EXPECT_TRUE(session_get_state(sess) == SESSION_STATE_OPENING);
    EXPECT_TRUE(session_get_type(sess) == SESSION_TYPE_TCP);
    EXPECT_TRUE(session_get_dup_traffic_flag(sess) == 0);
    EXPECT_TRUE(session_get_closing_reasion(sess) == 0);
    EXPECT_TRUE(session_get_c2s_bytes(sess) == 78);
    EXPECT_TRUE(session_get_s2c_bytes(sess) == 0);
    EXPECT_TRUE(session_get_c2s_packets(sess) == 1);
    EXPECT_TRUE(session_get_s2c_packets(sess) == 0);
    EXPECT_TRUE(session_get_create_time(sess) == timestamp_get_msec());
    EXPECT_TRUE(session_get_last_time(sess) == timestamp_get_msec());
    EXPECT_TRUE(session_get0_cur_pkt(sess) == &pkt);
    EXPECT_TRUE(session_get_cur_dir(sess) == SESSION_DIR_C2S);
    EXPECT_TRUE(session_get_tcp_state(sess) == TCP_SYN_RECVED);
    EXPECT_TRUE(session_get0_c2s_1st_pkt(sess) != NULL);
    EXPECT_TRUE(session_get0_s2c_1st_pkt(sess) == NULL);
    EXPECT_TRUE(session_get0_1st_pkt(sess) == session_get0_c2s_1st_pkt(sess));

    __session_dispatch(sess);

    __session_manager_count(mgr, 1, 0, 0, 0, 0, 0);
    __session_manager_dispatch(mgr, CLOSING_BY_TIMEOUT);
    __session_manager_count(mgr, 0, 0, 0, 0, 0, 0);

    session_manager_destroy(mgr);
}
#endif

/******************************************************************************
 * case: TCP init -> opening (by SYNACK)
 ******************************************************************************/

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

    timestamp_update();

    mgr = session_manager_create(&config);
    EXPECT_TRUE(mgr != NULL);

    // SYNACK Packet
    printf("=> packet parse: TCP S2C SYNACK packet\n");
    packet_parse(&pkt, (const char *)tcp_pkt2_s2c_syn_ack, sizeof(tcp_pkt2_s2c_syn_ack));
    printf("<= packet parse\n\n");
    sess = session_manager_update_session(mgr, &pkt);
    EXPECT_TRUE(sess);

    EXPECT_TRUE(session_get_id(sess) == 0);
    tuple6_tostring(session_get0_key(sess), buffer, sizeof(buffer));
    EXPECT_STREQ(buffer, "93.184.216.34:80 -> 192.168.38.105:60111, proto: 6, domain: 0");
    EXPECT_TRUE(session_get_key_dir(sess) == SESSION_DIR_S2C);
    EXPECT_TRUE(session_get_state(sess) == SESSION_STATE_OPENING);
    EXPECT_TRUE(session_get_type(sess) == SESSION_TYPE_TCP);
    EXPECT_TRUE(session_get_dup_traffic_flag(sess) == 0);
    EXPECT_TRUE(session_get_closing_reasion(sess) == 0);
    EXPECT_TRUE(session_get_c2s_bytes(sess) == 0);
    EXPECT_TRUE(session_get_s2c_bytes(sess) == 74);
    EXPECT_TRUE(session_get_c2s_packets(sess) == 0);
    EXPECT_TRUE(session_get_s2c_packets(sess) == 1);
    EXPECT_TRUE(session_get_create_time(sess) == timestamp_get_msec());
    EXPECT_TRUE(session_get_last_time(sess) == timestamp_get_msec());
    EXPECT_TRUE(session_get0_cur_pkt(sess) == &pkt);
    EXPECT_TRUE(session_get_cur_dir(sess) == SESSION_DIR_S2C);
    EXPECT_TRUE(session_get_tcp_state(sess) == TCP_SYNACK_RECVED);
    EXPECT_TRUE(session_get0_c2s_1st_pkt(sess) == NULL);
    EXPECT_TRUE(session_get0_s2c_1st_pkt(sess) != NULL);
    EXPECT_TRUE(session_get0_1st_pkt(sess) == session_get0_s2c_1st_pkt(sess));

    __session_dispatch(sess);

    __session_manager_count(mgr, 1, 0, 0, 0, 0, 0);
    __session_manager_dispatch(mgr, CLOSING_BY_TIMEOUT);
    __session_manager_count(mgr, 0, 0, 0, 0, 0, 0);

    session_manager_destroy(mgr);
}
#endif

/******************************************************************************
 * case: TCP init -> opening (by SYN + SYNACK)
 ******************************************************************************/

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

    timestamp_update();

    mgr = session_manager_create(&config);
    EXPECT_TRUE(mgr != NULL);

    // C2S SYN Packet
    printf("=> packet parse: TCP C2S SYN packet\n");
    packet_parse(&pkt, (const char *)tcp_pkt1_c2s_syn, sizeof(tcp_pkt1_c2s_syn));
    printf("<= packet parse\n\n");
    sess = session_manager_update_session(mgr, &pkt);
    EXPECT_TRUE(sess);

    EXPECT_TRUE(session_get_id(sess) == 0);
    tuple6_tostring(session_get0_key(sess), buffer, sizeof(buffer));
    EXPECT_STREQ(buffer, "192.168.38.105:60111 -> 93.184.216.34:80, proto: 6, domain: 0");
    EXPECT_TRUE(session_get_key_dir(sess) == SESSION_DIR_C2S);
    EXPECT_TRUE(session_get_state(sess) == SESSION_STATE_OPENING);
    EXPECT_TRUE(session_get_type(sess) == SESSION_TYPE_TCP);
    EXPECT_TRUE(session_get_dup_traffic_flag(sess) == 0);
    EXPECT_TRUE(session_get_closing_reasion(sess) == 0);
    EXPECT_TRUE(session_get_c2s_bytes(sess) == 78);
    EXPECT_TRUE(session_get_s2c_bytes(sess) == 0);
    EXPECT_TRUE(session_get_c2s_packets(sess) == 1);
    EXPECT_TRUE(session_get_s2c_packets(sess) == 0);
    EXPECT_TRUE(session_get_create_time(sess) == timestamp_get_msec());
    EXPECT_TRUE(session_get_last_time(sess) == timestamp_get_msec());
    EXPECT_TRUE(session_get0_cur_pkt(sess) == &pkt);
    EXPECT_TRUE(session_get_cur_dir(sess) == SESSION_DIR_C2S);
    EXPECT_TRUE(session_get_tcp_state(sess) == TCP_SYN_RECVED);
    EXPECT_TRUE(session_get0_c2s_1st_pkt(sess) != NULL);
    EXPECT_TRUE(session_get0_s2c_1st_pkt(sess) == NULL);
    EXPECT_TRUE(session_get0_1st_pkt(sess) == session_get0_c2s_1st_pkt(sess));

    __session_dispatch(sess);

    __session_manager_count(mgr, 1, 0, 0, 0, 0, 0);

    sleep(1);
    timestamp_update();

    // SYNACK Packet
    printf("=> packet parse: TCP S2C SYNACK packet\n");
    packet_parse(&pkt, (const char *)tcp_pkt2_s2c_syn_ack, sizeof(tcp_pkt2_s2c_syn_ack));
    printf("<= packet parse\n\n");
    sess = session_manager_update_session(mgr, &pkt);
    EXPECT_TRUE(sess);

    EXPECT_TRUE(session_get_id(sess) == 0);
    tuple6_tostring(session_get0_key(sess), buffer, sizeof(buffer));
    EXPECT_STREQ(buffer, "192.168.38.105:60111 -> 93.184.216.34:80, proto: 6, domain: 0");
    EXPECT_TRUE(session_get_key_dir(sess) == SESSION_DIR_C2S);
    EXPECT_TRUE(session_get_state(sess) == SESSION_STATE_OPENING);
    EXPECT_TRUE(session_get_type(sess) == SESSION_TYPE_TCP);
    EXPECT_TRUE(session_get_dup_traffic_flag(sess) == 0);
    EXPECT_TRUE(session_get_closing_reasion(sess) == 0);
    EXPECT_TRUE(session_get_c2s_bytes(sess) == 78);
    EXPECT_TRUE(session_get_s2c_bytes(sess) == 74);
    EXPECT_TRUE(session_get_c2s_packets(sess) == 1);
    EXPECT_TRUE(session_get_s2c_packets(sess) == 1);
    EXPECT_TRUE(session_get_create_time(sess) < timestamp_get_msec());
    EXPECT_TRUE(session_get_last_time(sess) == timestamp_get_msec());
    EXPECT_TRUE(session_get0_cur_pkt(sess) == &pkt);
    EXPECT_TRUE(session_get_cur_dir(sess) == SESSION_DIR_S2C);
    EXPECT_TRUE(session_get_tcp_state(sess) == (TCP_SYN_RECVED | TCP_SYNACK_RECVED));
    EXPECT_TRUE(session_get0_c2s_1st_pkt(sess) != NULL);
    EXPECT_TRUE(session_get0_s2c_1st_pkt(sess) != NULL);
    EXPECT_TRUE(session_get0_1st_pkt(sess) == session_get0_c2s_1st_pkt(sess));

    __session_dispatch(sess);

    __session_manager_count(mgr, 1, 0, 0, 0, 0, 0);
    __session_manager_dispatch(mgr, CLOSING_BY_TIMEOUT);
    __session_manager_count(mgr, 0, 0, 0, 0, 0, 0);

    session_manager_destroy(mgr);
}
#endif

/******************************************************************************
 * case: TCP init -> opening (by SYN + SYNACK + ACK)
 ******************************************************************************/

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

    timestamp_update();

    mgr = session_manager_create(&config);
    EXPECT_TRUE(mgr != NULL);

    // C2S SYN Packet
    printf("=> packet parse: TCP C2S SYN packet\n");
    packet_parse(&pkt, (const char *)tcp_pkt1_c2s_syn, sizeof(tcp_pkt1_c2s_syn));
    printf("<= packet parse\n\n");
    sess = session_manager_update_session(mgr, &pkt);
    EXPECT_TRUE(sess);

    EXPECT_TRUE(session_get_id(sess) == 0);
    tuple6_tostring(session_get0_key(sess), buffer, sizeof(buffer));
    EXPECT_STREQ(buffer, "192.168.38.105:60111 -> 93.184.216.34:80, proto: 6, domain: 0");
    EXPECT_TRUE(session_get_key_dir(sess) == SESSION_DIR_C2S);
    EXPECT_TRUE(session_get_state(sess) == SESSION_STATE_OPENING);
    EXPECT_TRUE(session_get_type(sess) == SESSION_TYPE_TCP);
    EXPECT_TRUE(session_get_dup_traffic_flag(sess) == 0);
    EXPECT_TRUE(session_get_closing_reasion(sess) == 0);
    EXPECT_TRUE(session_get_c2s_bytes(sess) == 78);
    EXPECT_TRUE(session_get_s2c_bytes(sess) == 0);
    EXPECT_TRUE(session_get_c2s_packets(sess) == 1);
    EXPECT_TRUE(session_get_s2c_packets(sess) == 0);
    EXPECT_TRUE(session_get_create_time(sess) == timestamp_get_msec());
    EXPECT_TRUE(session_get_last_time(sess) == timestamp_get_msec());
    EXPECT_TRUE(session_get0_cur_pkt(sess) == &pkt);
    EXPECT_TRUE(session_get_cur_dir(sess) == SESSION_DIR_C2S);
    EXPECT_TRUE(session_get_tcp_state(sess) == TCP_SYN_RECVED);
    EXPECT_TRUE(session_get0_c2s_1st_pkt(sess) != NULL);
    EXPECT_TRUE(session_get0_s2c_1st_pkt(sess) == NULL);
    EXPECT_TRUE(session_get0_1st_pkt(sess) == session_get0_c2s_1st_pkt(sess));

    __session_dispatch(sess);

    __session_manager_count(mgr, 1, 0, 0, 0, 0, 0);

    sleep(1);
    timestamp_update();

    // SYNACK Packet
    printf("=> packet parse: TCP S2C SYNACK packet\n");
    packet_parse(&pkt, (const char *)tcp_pkt2_s2c_syn_ack, sizeof(tcp_pkt2_s2c_syn_ack));
    printf("<= packet parse\n\n");
    sess = session_manager_update_session(mgr, &pkt);
    EXPECT_TRUE(sess);

    EXPECT_TRUE(session_get_id(sess) == 0);
    tuple6_tostring(session_get0_key(sess), buffer, sizeof(buffer));
    EXPECT_STREQ(buffer, "192.168.38.105:60111 -> 93.184.216.34:80, proto: 6, domain: 0");
    EXPECT_TRUE(session_get_key_dir(sess) == SESSION_DIR_C2S);
    EXPECT_TRUE(session_get_state(sess) == SESSION_STATE_OPENING);
    EXPECT_TRUE(session_get_type(sess) == SESSION_TYPE_TCP);
    EXPECT_TRUE(session_get_dup_traffic_flag(sess) == 0);
    EXPECT_TRUE(session_get_closing_reasion(sess) == 0);
    EXPECT_TRUE(session_get_c2s_bytes(sess) == 78);
    EXPECT_TRUE(session_get_s2c_bytes(sess) == 74);
    EXPECT_TRUE(session_get_c2s_packets(sess) == 1);
    EXPECT_TRUE(session_get_s2c_packets(sess) == 1);
    EXPECT_TRUE(session_get_create_time(sess) < timestamp_get_msec());
    EXPECT_TRUE(session_get_last_time(sess) == timestamp_get_msec());
    EXPECT_TRUE(session_get0_cur_pkt(sess) == &pkt);
    EXPECT_TRUE(session_get_cur_dir(sess) == SESSION_DIR_S2C);
    EXPECT_TRUE(session_get_tcp_state(sess) == (TCP_SYN_RECVED | TCP_SYNACK_RECVED));
    EXPECT_TRUE(session_get0_c2s_1st_pkt(sess) != NULL);
    EXPECT_TRUE(session_get0_s2c_1st_pkt(sess) != NULL);
    EXPECT_TRUE(session_get0_1st_pkt(sess) == session_get0_c2s_1st_pkt(sess));

    __session_dispatch(sess);

    __session_manager_count(mgr, 1, 0, 0, 0, 0, 0);

    sleep(1);
    timestamp_update();

    // ACK Packet
    printf("=> packet parse: TCP C2S ACK packet\n");
    packet_parse(&pkt, (const char *)tcp_pkt3_c2s_ack, sizeof(tcp_pkt3_c2s_ack));
    printf("<= packet parse\n\n");
    sess = session_manager_update_session(mgr, &pkt);
    EXPECT_TRUE(sess);

    EXPECT_TRUE(session_get_id(sess) == 0);
    tuple6_tostring(session_get0_key(sess), buffer, sizeof(buffer));
    EXPECT_STREQ(buffer, "192.168.38.105:60111 -> 93.184.216.34:80, proto: 6, domain: 0");
    EXPECT_TRUE(session_get_key_dir(sess) == SESSION_DIR_C2S);
    EXPECT_TRUE(session_get_state(sess) == SESSION_STATE_OPENING);
    EXPECT_TRUE(session_get_type(sess) == SESSION_TYPE_TCP);
    EXPECT_TRUE(session_get_dup_traffic_flag(sess) == 0);
    EXPECT_TRUE(session_get_closing_reasion(sess) == 0);
    EXPECT_TRUE(session_get_c2s_bytes(sess) == 78 + 66);
    EXPECT_TRUE(session_get_s2c_bytes(sess) == 74);
    EXPECT_TRUE(session_get_c2s_packets(sess) == 1 + 1);
    EXPECT_TRUE(session_get_s2c_packets(sess) == 1);
    EXPECT_TRUE(session_get_create_time(sess) < timestamp_get_msec());
    EXPECT_TRUE(session_get_last_time(sess) == timestamp_get_msec());
    EXPECT_TRUE(session_get0_cur_pkt(sess) == &pkt);
    EXPECT_TRUE(session_get_cur_dir(sess) == SESSION_DIR_C2S);
    EXPECT_TRUE(session_get_tcp_state(sess) == (TCP_SYN_RECVED | TCP_SYNACK_RECVED | TCP_C2S_ACK_RECVED));
    EXPECT_TRUE(session_get0_c2s_1st_pkt(sess) != NULL);
    EXPECT_TRUE(session_get0_s2c_1st_pkt(sess) != NULL);

    __session_dispatch(sess);

    __session_manager_count(mgr, 1, 0, 0, 0, 0, 0);
    __session_manager_dispatch(mgr, CLOSING_BY_TIMEOUT);
    __session_manager_count(mgr, 0, 0, 0, 0, 0, 0);

    session_manager_destroy(mgr);
}
#endif

/******************************************************************************
 * case: TCP init -> opening (by SYN retransmission)
 ******************************************************************************/

// overwrited ipid to build SYN retransmission

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

    timestamp_update();

    mgr = session_manager_create(&config);
    EXPECT_TRUE(mgr != NULL);

    // C2S SYN Packet
    printf("=> packet parse: TCP C2S SYN packet\n");
    packet_parse(&pkt, (const char *)tcp_pkt1_c2s_syn, sizeof(tcp_pkt1_c2s_syn));
    printf("<= packet parse\n\n");
    sess = session_manager_update_session(mgr, &pkt);
    EXPECT_TRUE(sess);

    EXPECT_TRUE(session_get_id(sess) == 0);
    tuple6_tostring(session_get0_key(sess), buffer, sizeof(buffer));
    EXPECT_STREQ(buffer, "192.168.38.105:60111 -> 93.184.216.34:80, proto: 6, domain: 0");
    EXPECT_TRUE(session_get_key_dir(sess) == SESSION_DIR_C2S);
    EXPECT_TRUE(session_get_state(sess) == SESSION_STATE_OPENING);
    EXPECT_TRUE(session_get_type(sess) == SESSION_TYPE_TCP);
    EXPECT_TRUE(session_get_dup_traffic_flag(sess) == 0);
    EXPECT_TRUE(session_get_closing_reasion(sess) == 0);
    EXPECT_TRUE(session_get_c2s_bytes(sess) == 78);
    EXPECT_TRUE(session_get_s2c_bytes(sess) == 0);
    EXPECT_TRUE(session_get_c2s_packets(sess) == 1);
    EXPECT_TRUE(session_get_s2c_packets(sess) == 0);
    EXPECT_TRUE(session_get_create_time(sess) == timestamp_get_msec());
    EXPECT_TRUE(session_get_last_time(sess) == timestamp_get_msec());
    EXPECT_TRUE(session_get0_cur_pkt(sess) == &pkt);
    EXPECT_TRUE(session_get_cur_dir(sess) == SESSION_DIR_C2S);
    EXPECT_TRUE(session_get_tcp_state(sess) == TCP_SYN_RECVED);
    EXPECT_TRUE(session_get0_c2s_1st_pkt(sess) != NULL);
    EXPECT_TRUE(session_get0_s2c_1st_pkt(sess) == NULL);
    EXPECT_TRUE(session_get0_1st_pkt(sess) == session_get0_c2s_1st_pkt(sess));

    __session_dispatch(sess);

    __session_manager_count(mgr, 1, 0, 0, 0, 0, 0);

    sleep(1);
    timestamp_update();

    // C2S SYN Packet retransmission
    printf("=> packet parse: TCP C2S SYN retransmission packet\n");
    char tcp_pkt_c2s_syn_retransmission[1500] = {0};
    memcpy(tcp_pkt_c2s_syn_retransmission, tcp_pkt1_c2s_syn, sizeof(tcp_pkt1_c2s_syn));
    packet_parse(&pkt, (const char *)tcp_pkt_c2s_syn_retransmission, sizeof(tcp_pkt1_c2s_syn));
    const struct layer_record *ipv4_layer = packet_get_innermost_layer(&pkt, LAYER_TYPE_IPV4);
    EXPECT_TRUE(ipv4_layer);
    const struct ip *hdr = (const struct ip *)ipv4_layer->hdr_ptr;
    ipv4_hdr_set_ipid((struct ip *)hdr, 0x1234);
    printf("<= packet parse\n\n");
    sess = session_manager_update_session(mgr, &pkt);
    EXPECT_TRUE(sess);

    EXPECT_TRUE(session_get_id(sess) == 0);
    tuple6_tostring(session_get0_key(sess), buffer, sizeof(buffer));
    EXPECT_STREQ(buffer, "192.168.38.105:60111 -> 93.184.216.34:80, proto: 6, domain: 0");
    EXPECT_TRUE(session_get_key_dir(sess) == SESSION_DIR_C2S);
    EXPECT_TRUE(session_get_state(sess) == SESSION_STATE_OPENING);
    EXPECT_TRUE(session_get_type(sess) == SESSION_TYPE_TCP);
    EXPECT_TRUE(session_get_dup_traffic_flag(sess) == 0);
    EXPECT_TRUE(session_get_closing_reasion(sess) == 0);
    EXPECT_TRUE(session_get_c2s_bytes(sess) == 78 + 78);
    EXPECT_TRUE(session_get_s2c_bytes(sess) == 0);
    EXPECT_TRUE(session_get_c2s_packets(sess) == 1 + 1);
    EXPECT_TRUE(session_get_s2c_packets(sess) == 0);
    EXPECT_TRUE(session_get_create_time(sess) < timestamp_get_msec());
    EXPECT_TRUE(session_get_last_time(sess) == timestamp_get_msec());
    EXPECT_TRUE(session_get0_cur_pkt(sess) == &pkt);
    EXPECT_TRUE(session_get_cur_dir(sess) == SESSION_DIR_C2S);
    EXPECT_TRUE(session_get_tcp_state(sess) == TCP_SYN_RECVED);
    EXPECT_TRUE(session_get0_c2s_1st_pkt(sess) != NULL);
    EXPECT_TRUE(session_get0_s2c_1st_pkt(sess) == NULL);
    EXPECT_TRUE(session_get0_1st_pkt(sess) == session_get0_c2s_1st_pkt(sess));

    __session_dispatch(sess);

    __session_manager_count(mgr, 1, 0, 0, 0, 0, 0);
    __session_manager_dispatch(mgr, CLOSING_BY_TIMEOUT);
    __session_manager_count(mgr, 0, 0, 0, 0, 0, 0);

    session_manager_destroy(mgr);
}
#endif

/******************************************************************************
 * case: TCP init -> opening (by SYNACK retransmission)
 ******************************************************************************/

// overwrited ipid to build SYNACK retransmission

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

    timestamp_update();

    mgr = session_manager_create(&config);
    EXPECT_TRUE(mgr != NULL);

    // SYNACK Packet
    printf("=> packet parse: TCP S2C SYNACK packet\n");
    packet_parse(&pkt, (const char *)tcp_pkt2_s2c_syn_ack, sizeof(tcp_pkt2_s2c_syn_ack));
    printf("<= packet parse\n\n");
    sess = session_manager_update_session(mgr, &pkt);
    EXPECT_TRUE(sess);

    EXPECT_TRUE(session_get_id(sess) == 0);
    tuple6_tostring(session_get0_key(sess), buffer, sizeof(buffer));
    EXPECT_STREQ(buffer, "93.184.216.34:80 -> 192.168.38.105:60111, proto: 6, domain: 0");
    EXPECT_TRUE(session_get_key_dir(sess) == SESSION_DIR_S2C);
    EXPECT_TRUE(session_get_state(sess) == SESSION_STATE_OPENING);
    EXPECT_TRUE(session_get_type(sess) == SESSION_TYPE_TCP);
    EXPECT_TRUE(session_get_dup_traffic_flag(sess) == 0);
    EXPECT_TRUE(session_get_closing_reasion(sess) == 0);
    EXPECT_TRUE(session_get_c2s_bytes(sess) == 0);
    EXPECT_TRUE(session_get_s2c_bytes(sess) == 74);
    EXPECT_TRUE(session_get_c2s_packets(sess) == 0);
    EXPECT_TRUE(session_get_s2c_packets(sess) == 1);
    EXPECT_TRUE(session_get_create_time(sess) == timestamp_get_msec());
    EXPECT_TRUE(session_get_last_time(sess) == timestamp_get_msec());
    EXPECT_TRUE(session_get0_cur_pkt(sess) == &pkt);
    EXPECT_TRUE(session_get_cur_dir(sess) == SESSION_DIR_S2C);
    EXPECT_TRUE(session_get_tcp_state(sess) == TCP_SYNACK_RECVED);
    EXPECT_TRUE(session_get0_c2s_1st_pkt(sess) == NULL);
    EXPECT_TRUE(session_get0_s2c_1st_pkt(sess) != NULL);
    EXPECT_TRUE(session_get0_1st_pkt(sess) == session_get0_s2c_1st_pkt(sess));

    __session_dispatch(sess);

    __session_manager_count(mgr, 1, 0, 0, 0, 0, 0);

    sleep(1);
    timestamp_update();

    // SYNACK Packet retransmission
    printf("=> packet parse: TCP S2C SYNACK retransmission packet\n");
    char tcp_pkt_s2c_synack_retransmission[1500] = {0};
    memcpy(tcp_pkt_s2c_synack_retransmission, tcp_pkt2_s2c_syn_ack, sizeof(tcp_pkt2_s2c_syn_ack));
    packet_parse(&pkt, (const char *)tcp_pkt_s2c_synack_retransmission, sizeof(tcp_pkt2_s2c_syn_ack));
    const struct layer_record *ipv4_layer = packet_get_innermost_layer(&pkt, LAYER_TYPE_IPV4);
    EXPECT_TRUE(ipv4_layer);
    const struct ip *hdr = (const struct ip *)ipv4_layer->hdr_ptr;
    ipv4_hdr_set_ipid((struct ip *)hdr, 0x1234);
    printf("<= packet parse\n\n");
    sess = session_manager_update_session(mgr, &pkt);
    EXPECT_TRUE(sess);

    EXPECT_TRUE(session_get_id(sess) == 0);
    tuple6_tostring(session_get0_key(sess), buffer, sizeof(buffer));
    EXPECT_STREQ(buffer, "93.184.216.34:80 -> 192.168.38.105:60111, proto: 6, domain: 0");
    EXPECT_TRUE(session_get_key_dir(sess) == SESSION_DIR_S2C);
    EXPECT_TRUE(session_get_state(sess) == SESSION_STATE_OPENING);
    EXPECT_TRUE(session_get_type(sess) == SESSION_TYPE_TCP);
    EXPECT_TRUE(session_get_dup_traffic_flag(sess) == 0);
    EXPECT_TRUE(session_get_closing_reasion(sess) == 0);
    EXPECT_TRUE(session_get_c2s_bytes(sess) == 0);
    EXPECT_TRUE(session_get_s2c_bytes(sess) == 74 + 74);
    EXPECT_TRUE(session_get_c2s_packets(sess) == 0);
    EXPECT_TRUE(session_get_s2c_packets(sess) == 1 + 1);
    EXPECT_TRUE(session_get_create_time(sess) < timestamp_get_msec());
    EXPECT_TRUE(session_get_last_time(sess) == timestamp_get_msec());
    EXPECT_TRUE(session_get0_cur_pkt(sess) == &pkt);
    EXPECT_TRUE(session_get_cur_dir(sess) == SESSION_DIR_S2C);
    EXPECT_TRUE(session_get_tcp_state(sess) == TCP_SYNACK_RECVED);
    EXPECT_TRUE(session_get0_c2s_1st_pkt(sess) == NULL);
    EXPECT_TRUE(session_get0_s2c_1st_pkt(sess) != NULL);
    EXPECT_TRUE(session_get0_1st_pkt(sess) == session_get0_s2c_1st_pkt(sess));

    __session_dispatch(sess);

    __session_manager_count(mgr, 1, 0, 0, 0, 0, 0);
    __session_manager_dispatch(mgr, CLOSING_BY_TIMEOUT);
    __session_manager_count(mgr, 0, 0, 0, 0, 0, 0);

    session_manager_destroy(mgr);
}
#endif

/******************************************************************************
 * case: TCP init -> opening (by C2S asymmetric)
 ******************************************************************************/

#if 1
TEST(TCP_INIT_TO_OPENING, BY_C2S_ASMMETRIC)
{
    char buffer[1024] = {0};
    struct packet pkt;
    struct session *sess = NULL;
    struct session_manager *mgr = NULL;

    timestamp_update();

    mgr = session_manager_create(&config);
    EXPECT_TRUE(mgr != NULL);

    // C2S SYN Packet
    printf("=> packet parse: TCP C2S SYN packet\n");
    packet_parse(&pkt, (const char *)tcp_pkt1_c2s_syn, sizeof(tcp_pkt1_c2s_syn));
    printf("<= packet parse\n\n");
    sess = session_manager_update_session(mgr, &pkt);
    EXPECT_TRUE(sess);

    EXPECT_TRUE(session_get_id(sess) == 0);
    tuple6_tostring(session_get0_key(sess), buffer, sizeof(buffer));
    EXPECT_STREQ(buffer, "192.168.38.105:60111 -> 93.184.216.34:80, proto: 6, domain: 0");
    EXPECT_TRUE(session_get_key_dir(sess) == SESSION_DIR_C2S);
    EXPECT_TRUE(session_get_state(sess) == SESSION_STATE_OPENING);
    EXPECT_TRUE(session_get_type(sess) == SESSION_TYPE_TCP);
    EXPECT_TRUE(session_get_dup_traffic_flag(sess) == 0);
    EXPECT_TRUE(session_get_closing_reasion(sess) == 0);
    EXPECT_TRUE(session_get_c2s_bytes(sess) == 78);
    EXPECT_TRUE(session_get_s2c_bytes(sess) == 0);
    EXPECT_TRUE(session_get_c2s_packets(sess) == 1);
    EXPECT_TRUE(session_get_s2c_packets(sess) == 0);
    EXPECT_TRUE(session_get_create_time(sess) == timestamp_get_msec());
    EXPECT_TRUE(session_get_last_time(sess) == timestamp_get_msec());
    EXPECT_TRUE(session_get0_cur_pkt(sess) == &pkt);
    EXPECT_TRUE(session_get_cur_dir(sess) == SESSION_DIR_C2S);
    EXPECT_TRUE(session_get_tcp_state(sess) == TCP_SYN_RECVED);
    EXPECT_TRUE(session_get0_c2s_1st_pkt(sess) != NULL);
    EXPECT_TRUE(session_get0_s2c_1st_pkt(sess) == NULL);
    EXPECT_TRUE(session_get0_1st_pkt(sess) == session_get0_c2s_1st_pkt(sess));

    __session_dispatch(sess);

    __session_manager_count(mgr, 1, 0, 0, 0, 0, 0);

    sleep(1);
    timestamp_update();

    // ACK Packet
    printf("=> packet parse: TCP C2S ACK packet\n");
    packet_parse(&pkt, (const char *)tcp_pkt3_c2s_ack, sizeof(tcp_pkt3_c2s_ack));
    printf("<= packet parse\n\n");
    sess = session_manager_update_session(mgr, &pkt);
    EXPECT_TRUE(sess);

    EXPECT_TRUE(session_get_id(sess) == 0);
    tuple6_tostring(session_get0_key(sess), buffer, sizeof(buffer));
    EXPECT_STREQ(buffer, "192.168.38.105:60111 -> 93.184.216.34:80, proto: 6, domain: 0");
    EXPECT_TRUE(session_get_key_dir(sess) == SESSION_DIR_C2S);
    EXPECT_TRUE(session_get_state(sess) == SESSION_STATE_OPENING);
    EXPECT_TRUE(session_get_type(sess) == SESSION_TYPE_TCP);
    EXPECT_TRUE(session_get_dup_traffic_flag(sess) == 0);
    EXPECT_TRUE(session_get_closing_reasion(sess) == 0);
    EXPECT_TRUE(session_get_c2s_bytes(sess) == 78 + 66);
    EXPECT_TRUE(session_get_s2c_bytes(sess) == 0);
    EXPECT_TRUE(session_get_c2s_packets(sess) == 1 + 1);
    EXPECT_TRUE(session_get_s2c_packets(sess) == 0);
    EXPECT_TRUE(session_get_create_time(sess) < timestamp_get_msec());
    EXPECT_TRUE(session_get_last_time(sess) == timestamp_get_msec());
    EXPECT_TRUE(session_get0_cur_pkt(sess) == &pkt);
    EXPECT_TRUE(session_get_cur_dir(sess) == SESSION_DIR_C2S);
    EXPECT_TRUE(session_get_tcp_state(sess) == (TCP_SYN_RECVED | TCP_C2S_ACK_RECVED));
    EXPECT_TRUE(session_get0_c2s_1st_pkt(sess) != NULL);
    EXPECT_TRUE(session_get0_s2c_1st_pkt(sess) == NULL);
    EXPECT_TRUE(session_get0_1st_pkt(sess) == session_get0_c2s_1st_pkt(sess));

    __session_dispatch(sess);

    __session_manager_count(mgr, 1, 0, 0, 0, 0, 0);
    __session_manager_dispatch(mgr, CLOSING_BY_TIMEOUT);
    __session_manager_count(mgr, 0, 0, 0, 0, 0, 0);

    session_manager_destroy(mgr);
}
#endif

/******************************************************************************
 * case: TCP init -> opening (by S2C asymmetric)
 ******************************************************************************/

#if 1
TEST(TCP_INIT_TO_OPENING, BY_S2C_ASMMETRIC)
{
    char buffer[1024] = {0};
    struct packet pkt;
    struct session *sess = NULL;
    struct session_manager *mgr = NULL;

    timestamp_update();

    mgr = session_manager_create(&config);
    EXPECT_TRUE(mgr != NULL);

    // SYNACK Packet
    printf("=> packet parse: TCP S2C SYNACK packet\n");
    packet_parse(&pkt, (const char *)tcp_pkt2_s2c_syn_ack, sizeof(tcp_pkt2_s2c_syn_ack));
    printf("<= packet parse\n\n");
    sess = session_manager_update_session(mgr, &pkt);
    EXPECT_TRUE(sess);

    EXPECT_TRUE(session_get_id(sess) == 0);
    tuple6_tostring(session_get0_key(sess), buffer, sizeof(buffer));
    EXPECT_STREQ(buffer, "93.184.216.34:80 -> 192.168.38.105:60111, proto: 6, domain: 0");
    EXPECT_TRUE(session_get_key_dir(sess) == SESSION_DIR_S2C);
    EXPECT_TRUE(session_get_state(sess) == SESSION_STATE_OPENING);
    EXPECT_TRUE(session_get_type(sess) == SESSION_TYPE_TCP);
    EXPECT_TRUE(session_get_dup_traffic_flag(sess) == 0);
    EXPECT_TRUE(session_get_closing_reasion(sess) == 0);
    EXPECT_TRUE(session_get_c2s_bytes(sess) == 0);
    EXPECT_TRUE(session_get_s2c_bytes(sess) == 74);
    EXPECT_TRUE(session_get_c2s_packets(sess) == 0);
    EXPECT_TRUE(session_get_s2c_packets(sess) == 1);
    EXPECT_TRUE(session_get_create_time(sess) == timestamp_get_msec());
    EXPECT_TRUE(session_get_last_time(sess) == timestamp_get_msec());
    EXPECT_TRUE(session_get0_cur_pkt(sess) == &pkt);
    EXPECT_TRUE(session_get_cur_dir(sess) == SESSION_DIR_S2C);
    EXPECT_TRUE(session_get_tcp_state(sess) == TCP_SYNACK_RECVED);
    EXPECT_TRUE(session_get0_c2s_1st_pkt(sess) == NULL);
    EXPECT_TRUE(session_get0_s2c_1st_pkt(sess) != NULL);
    EXPECT_TRUE(session_get0_1st_pkt(sess) == session_get0_s2c_1st_pkt(sess));

    __session_dispatch(sess);

    __session_manager_count(mgr, 1, 0, 0, 0, 0, 0);

    sleep(1);
    timestamp_update();

    // ACK Packet
    printf("=> packet parse: TCP S2C ACK packet\n");
    packet_parse(&pkt, (const char *)tcp_pkt5_s2c_ack, sizeof(tcp_pkt5_s2c_ack));
    printf("<= packet parse\n\n");
    sess = session_manager_update_session(mgr, &pkt);
    EXPECT_TRUE(sess);

    EXPECT_TRUE(session_get_id(sess) == 0);
    tuple6_tostring(session_get0_key(sess), buffer, sizeof(buffer));
    EXPECT_STREQ(buffer, "93.184.216.34:80 -> 192.168.38.105:60111, proto: 6, domain: 0");
    EXPECT_TRUE(session_get_key_dir(sess) == SESSION_DIR_S2C);
    EXPECT_TRUE(session_get_state(sess) == SESSION_STATE_OPENING);
    EXPECT_TRUE(session_get_type(sess) == SESSION_TYPE_TCP);
    EXPECT_TRUE(session_get_dup_traffic_flag(sess) == 0);
    EXPECT_TRUE(session_get_closing_reasion(sess) == 0);
    EXPECT_TRUE(session_get_c2s_bytes(sess) == 0);
    EXPECT_TRUE(session_get_s2c_bytes(sess) == 74 + 66);
    EXPECT_TRUE(session_get_c2s_packets(sess) == 0);
    EXPECT_TRUE(session_get_s2c_packets(sess) == 1 + 1);
    EXPECT_TRUE(session_get_create_time(sess) < timestamp_get_msec());
    EXPECT_TRUE(session_get_last_time(sess) == timestamp_get_msec());
    EXPECT_TRUE(session_get0_cur_pkt(sess) == &pkt);
    EXPECT_TRUE(session_get_cur_dir(sess) == SESSION_DIR_S2C);
    EXPECT_TRUE(session_get_tcp_state(sess) == (TCP_SYNACK_RECVED | TCP_S2C_ACK_RECVED));
    EXPECT_TRUE(session_get0_c2s_1st_pkt(sess) == NULL);
    EXPECT_TRUE(session_get0_s2c_1st_pkt(sess) != NULL);
    EXPECT_TRUE(session_get0_1st_pkt(sess) == session_get0_s2c_1st_pkt(sess));

    __session_dispatch(sess);

    __session_manager_count(mgr, 1, 0, 0, 0, 0, 0);
    __session_manager_dispatch(mgr, CLOSING_BY_TIMEOUT);
    __session_manager_count(mgr, 0, 0, 0, 0, 0, 0);

    session_manager_destroy(mgr);
}
#endif

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