// TCP state machine test: active -> closing

#include "test_state_machine.h"

static void build_active_tcp_session(struct session_manager *mgr, struct session *sess)
{
    char buffer[1024] = {0};
    struct packet pkt;

    // 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 DATA Packet
    printf("=> packet parse: TCP C2S DATA packet\n");
    packet_parse(&pkt, (const char *)tcp_pkt4_c2s_http_req, sizeof(tcp_pkt4_c2s_http_req));
    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_ACTIVE);
    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 + 145);
    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 | TCP_C2S_DATA_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, 0, 1, 0, 0, 0, 0);

    sleep(1);
    timestamp_update();
}

/******************************************************************************
 * 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;

    timestamp_update();

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

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

    // C2S FIN Packet
    printf("=> packet parse: TCP C2S FIN packet\n");
    packet_parse(&pkt, (const char *)tcp_pkt9_c2s_fin, sizeof(tcp_pkt9_c2s_fin));
    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_ACTIVE);
    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) == CLOSING_BY_CLIENT_FIN);
    EXPECT_TRUE(session_get_c2s_bytes(sess) == 78 + 145 + 66);
    EXPECT_TRUE(session_get_s2c_bytes(sess) == 0);
    EXPECT_TRUE(session_get_c2s_packets(sess) == 1 + 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 | TCP_C2S_DATA_RECVED | TCP_C2S_FIN_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, 0, 1, 0, 0, 0, 0);

    sleep(1);
    timestamp_update();

    // S2C FIN Packet
    printf("=> packet parse: TCP S2C FIN packet\n");
    packet_parse(&pkt, (const char *)tcp_pkt10_s2c_fin, sizeof(tcp_pkt10_s2c_fin));
    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_CLOSING);
    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) == CLOSING_BY_CLIENT_FIN);
    EXPECT_TRUE(session_get_c2s_bytes(sess) == 78 + 145 + 66);
    EXPECT_TRUE(session_get_s2c_bytes(sess) == 66);
    EXPECT_TRUE(session_get_c2s_packets(sess) == 1 + 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_S2C);
    EXPECT_TRUE(session_get_tcp_state(sess) == (TCP_SYN_RECVED | TCP_C2S_ACK_RECVED | TCP_S2C_ACK_RECVED | TCP_C2S_DATA_RECVED | TCP_C2S_FIN_RECVED | TCP_S2C_FIN_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, 0, 0, 1, 0, 0, 0);
    __session_manager_dispatch(mgr, CLOSING_BY_CLIENT_FIN);
    __session_manager_count(mgr, 0, 0, 0, 0, 0, 0);

    session_manager_destroy(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;

    timestamp_update();

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

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

    // C2S RST Packet
    printf("=> 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));
    packet_parse(&pkt, (const char *)tcp_pkt_c2s_rst, sizeof(tcp_pkt9_c2s_fin));
    const struct layer_record *tcp_layer = packet_get_innermost_layer(&pkt, LAYER_TYPE_TCP);
    EXPECT_TRUE(tcp_layer);
    struct tcphdr *hdr = (struct tcphdr *)tcp_layer->hdr_ptr;
    tcp_hdr_set_flags(hdr, 0);
    tcp_hdr_set_flag_rst(hdr);
    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_CLOSING);
    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) == CLOSING_BY_CLIENT_RST);
    EXPECT_TRUE(session_get_c2s_bytes(sess) == 78 + 145 + 66);
    EXPECT_TRUE(session_get_s2c_bytes(sess) == 0);
    EXPECT_TRUE(session_get_c2s_packets(sess) == 1 + 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 | TCP_C2S_DATA_RECVED | TCP_C2S_RST_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, 0, 0, 1, 0, 0, 0);
    __session_manager_dispatch(mgr, CLOSING_BY_CLIENT_RST);
    __session_manager_count(mgr, 0, 0, 0, 0, 0, 0);

    session_manager_destroy(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;

    timestamp_update();

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

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

    // S2C RST Packet
    printf("=> 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));
    packet_parse(&pkt, (const char *)tcp_pkt_s2c_rst, sizeof(tcp_pkt10_s2c_fin));
    const struct layer_record *tcp_layer = packet_get_innermost_layer(&pkt, LAYER_TYPE_TCP);
    EXPECT_TRUE(tcp_layer);
    struct tcphdr *hdr = (struct tcphdr *)tcp_layer->hdr_ptr;
    tcp_hdr_set_flags(hdr, 0);
    tcp_hdr_set_flag_rst(hdr);
    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_CLOSING);
    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) == CLOSING_BY_SERVER_RST);
    EXPECT_TRUE(session_get_c2s_bytes(sess) == 78 + 145);
    EXPECT_TRUE(session_get_s2c_bytes(sess) == 66);
    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_S2C);
    EXPECT_TRUE(session_get_tcp_state(sess) == (TCP_SYN_RECVED | TCP_C2S_ACK_RECVED | TCP_C2S_DATA_RECVED | TCP_S2C_RST_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, 0, 0, 1, 0, 0, 0);
    __session_manager_dispatch(mgr, CLOSING_BY_SERVER_RST);
    __session_manager_count(mgr, 0, 0, 0, 0, 0, 0);

    session_manager_destroy(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;

    timestamp_update();

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

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

    __session_manager_count(mgr, 0, 1, 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 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;

    timestamp_update();

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

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

    // C2S FIN Packet
    printf("=> packet parse: TCP C2S FIN packet\n");
    packet_parse(&pkt, (const char *)tcp_pkt9_c2s_fin, sizeof(tcp_pkt9_c2s_fin));
    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_ACTIVE);
    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) == CLOSING_BY_CLIENT_FIN);
    EXPECT_TRUE(session_get_c2s_bytes(sess) == 78 + 145 + 66);
    EXPECT_TRUE(session_get_s2c_bytes(sess) == 0);
    EXPECT_TRUE(session_get_c2s_packets(sess) == 1 + 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 | TCP_C2S_DATA_RECVED | TCP_C2S_FIN_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, 0, 1, 0, 0, 0, 0);
    __session_manager_dispatch(mgr, CLOSING_BY_CLIENT_FIN);
    __session_manager_count(mgr, 0, 0, 0, 0, 0, 0);

    session_manager_destroy(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;

    timestamp_update();

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

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

    // S2C FIN Packet
    printf("=> packet parse: TCP S2C FIN packet\n");
    packet_parse(&pkt, (const char *)tcp_pkt10_s2c_fin, sizeof(tcp_pkt10_s2c_fin));
    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_ACTIVE);
    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) == CLOSING_BY_SERVER_FIN);
    EXPECT_TRUE(session_get_c2s_bytes(sess) == 78 + 145);
    EXPECT_TRUE(session_get_s2c_bytes(sess) == 66);
    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_S2C);
    EXPECT_TRUE(session_get_tcp_state(sess) == (TCP_SYN_RECVED | TCP_C2S_ACK_RECVED | TCP_S2C_ACK_RECVED | TCP_C2S_DATA_RECVED | TCP_S2C_FIN_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, 0, 1, 0, 0, 0, 0);
    __session_manager_dispatch(mgr, CLOSING_BY_SERVER_FIN);
    __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();
}