stellar-stellar/src/session/test/gtest_overload_evict_tcp_sess.cpp

#include <gtest/gtest.h>

#include "session.h"
#include "session_manager.h"

#include "stellar.h"
#include "ipv4_utils.h"
#include "test_packets.h"

struct session_manager_options opts = {
    // max session number
    .max_tcp_session_num = RX_BURST_MAX * 2,
    .max_udp_session_num = RX_BURST_MAX * 2,

    // session overload
    .tcp_overload_evict_old_sess = 1, // 1: evict old session, 0: bypass new session
    .udp_overload_evict_old_sess = 1, // 1: evict old session, 0: bypass new session

    // tcp timeout
    .tcp_timeout_init = 1,
    .tcp_timeout_handshake = 2,
    .tcp_timeout_data = 3,
    .tcp_timeout_half_closed = 4,
    .tcp_timeout_time_wait = 5,
    .tcp_timeout_discard = 6,

    // udp timeout
    .udp_timeout_data = 7,

    // duplicate packet filter

    .duplicated_packet_filter_enable = 1,
    .duplicated_packet_filter_capacity = 1000,
    .duplicated_packet_filter_timeout = 10,
    .duplicated_packet_filter_error_rate = 0.0001,

    // evicted session filter
    .evicted_session_filter_enable = 1,
    .evicted_session_filter_capacity = 1000,
    .evicted_session_filter_timeout = 10,
    .evicted_session_filter_error_rate = 0.0001,
};

static void packet_set_tcp_src_addr(struct packet *pkt, uint32_t addr)
{
    const struct layer *ipv4_layer = packet_get_innermost_layer(pkt, LAYER_TYPE_IPV4);
    EXPECT_TRUE(ipv4_layer);
    struct ip *hdr = (struct ip *)ipv4_layer->hdr_ptr;
    ipv4_hdr_set_src_addr(hdr, addr);
}

#if 1
TEST(TCP_OVERLOAD, EVICT_TCP_OLD_SESS)
{
    struct packet pkt;
    struct session_manager *mgr = NULL;
    struct session_manager_stat *stat = NULL;

    mgr = session_manager_new(&opts, 1);
    EXPECT_TRUE(mgr != NULL);

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

    // new session
    for (uint32_t i = 0; i < opts.max_tcp_session_num; i++)
    {
        packet_set_tcp_src_addr(&pkt, i);
        EXPECT_TRUE(session_manager_new_session(mgr, &pkt, 1));
    }
    printf("=> Session Manager: after add %lu new sessions\n", opts.max_tcp_session_num);
    session_manager_print_stat(mgr);
    stat = session_manager_get_stat(mgr);
    EXPECT_TRUE(stat);
    EXPECT_TRUE(stat->tcp_sess.nr_sess_used == opts.max_tcp_session_num);
    EXPECT_TRUE(stat->tcp_sess.nr_sess_init == 0);
    EXPECT_TRUE(stat->tcp_sess.nr_sess_opening == RX_BURST_MAX);
    EXPECT_TRUE(stat->tcp_sess.nr_sess_active == 0);
    EXPECT_TRUE(stat->tcp_sess.nr_sess_closing == 0);
    EXPECT_TRUE(stat->tcp_sess.nr_sess_closed == RX_BURST_MAX); // have evicted, have't free
    EXPECT_TRUE(stat->tcp_sess.nr_new_sess_evicted == 0);
    EXPECT_TRUE(stat->tcp_sess.nr_old_sess_evicted == RX_BURST_MAX);
    EXPECT_TRUE(stat->evc_pkt.nr_pkts == 0);
    EXPECT_TRUE(stat->evc_pkt.nr_bytes == 0);

    session_manager_free(mgr);
}
#endif

#if 1
TEST(TCP_OVERLOAD, EVICT_TCP_NEW_SESS)
{
    struct packet pkt;
    struct session_manager *mgr = NULL;
    struct session_manager_stat *stat = NULL;
    struct session_manager_options _opts;
    memcpy(&_opts, &opts, sizeof(struct session_manager_options));
    _opts.tcp_overload_evict_old_sess = 0;

    mgr = session_manager_new(&_opts, 1);
    EXPECT_TRUE(mgr != NULL);

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

    // new session
    for (uint32_t i = 0; i < opts.max_tcp_session_num; i++)
    {
        packet_set_tcp_src_addr(&pkt, i);
        EXPECT_TRUE(session_manager_new_session(mgr, &pkt, 1));
    }
    printf("=> Session Manager: after add %lu new sessions\n", opts.max_tcp_session_num);
    session_manager_print_stat(mgr);
    stat = session_manager_get_stat(mgr);
    EXPECT_TRUE(stat);
    EXPECT_TRUE(stat->tcp_sess.nr_sess_used == opts.max_tcp_session_num);
    EXPECT_TRUE(stat->tcp_sess.nr_sess_init == 0);
    EXPECT_TRUE(stat->tcp_sess.nr_sess_opening == opts.max_tcp_session_num);
    EXPECT_TRUE(stat->tcp_sess.nr_sess_active == 0);
    EXPECT_TRUE(stat->tcp_sess.nr_sess_closing == 0);
    EXPECT_TRUE(stat->tcp_sess.nr_sess_closed == 0);
    EXPECT_TRUE(stat->tcp_sess.nr_new_sess_evicted == 0);
    EXPECT_TRUE(stat->tcp_sess.nr_old_sess_evicted == 0);
    EXPECT_TRUE(stat->evc_pkt.nr_pkts == 0);
    EXPECT_TRUE(stat->evc_pkt.nr_bytes == 0);

    // table full, evict new session
    for (uint32_t i = 0; i < RX_BURST_MAX; i++)
    {
        packet_set_tcp_src_addr(&pkt, opts.max_tcp_session_num + i);
        EXPECT_TRUE(session_manager_lookup_session(mgr, &pkt) == NULL);
        EXPECT_TRUE(session_manager_new_session(mgr, &pkt, 1) == NULL);
    }
    printf("=> Session Manager: after evicte new session\n");
    session_manager_print_stat(mgr);
    stat = session_manager_get_stat(mgr);
    EXPECT_TRUE(stat);
    EXPECT_TRUE(stat->tcp_sess.nr_sess_used == opts.max_tcp_session_num);
    EXPECT_TRUE(stat->tcp_sess.nr_sess_init == 0);
    EXPECT_TRUE(stat->tcp_sess.nr_sess_opening == opts.max_tcp_session_num);
    EXPECT_TRUE(stat->tcp_sess.nr_sess_active == 0);
    EXPECT_TRUE(stat->tcp_sess.nr_sess_closing == 0);
    EXPECT_TRUE(stat->tcp_sess.nr_sess_closed == 0);
    EXPECT_TRUE(stat->tcp_sess.nr_new_sess_evicted == RX_BURST_MAX);
    EXPECT_TRUE(stat->tcp_sess.nr_old_sess_evicted == 0);
    EXPECT_TRUE(stat->evc_pkt.nr_pkts == RX_BURST_MAX);
    EXPECT_TRUE(stat->evc_pkt.nr_bytes == RX_BURST_MAX * sizeof(tcp_pkt1_c2s_syn));

    session_manager_free(mgr);
}
#endif

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