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/* Cesar project {{{
 *
 * Copyright (C) 2010 Spidcom
 *
 * <<<Licence>>>
 *
 * }}} */
/**
 * \file    src/test_mme.c
 * \brief   Test MME submodule.
 * \ingroup test
 */
#include "common/std.h"

#include "inc/context.h"

#include "common/defs/ethernet.h"
#include "lib/test.h"

#include <string.h>

#define TEST_MME_MAC 0x3412ffd71300ull /* 00:13:d7:ff:12:34 */
#define TEST_MME_MAC_PEER 0x4523ffd71300ull /* 00:13:d7:ff:23:45 */
#define TEST_MME_MAC_OTHER 0x5634ffd71300ull /* 00:13:d7:ff:34:56 */

/* Excepted buffer and buffer length. */
struct send_expect_t
{
    const u32 *buffer;
    uint length;
};
typedef struct send_expect_t send_expect_t;

/* Expected buffer to be sent to upper layers, reset on match. */
static send_expect_t send_expect;

/* Set if an unexpected buffer is sent. */
static bool send_unexpected;

/* Same as send_expect, but for more than one buffer, to be cleaned by the
 * test after use. */
static send_expect_t send_expect_array[32];

/* Used with send_expect_array, incremented on match. */
static uint send_expect_array_index = COUNT (send_expect_array);

u8 *
lhle_buffer_get (sniffer_phy_t *ctx)
{
    static u32 buffer[ETH_PACKET_MAX_SIZE / 4 + 1];
    dbg_assert (ctx);
    return (u8 *) buffer;
}

void
lhle_send (sniffer_phy_t *ctx, u8 *buffer, uint length)
{
    dbg_assert (ctx);
    dbg_assert (!DEFS_BIG_ENDIAN);
    send_expect_t *sea = &send_expect_array[send_expect_array_index];
    if (send_expect.buffer
        && length == send_expect.length
        && memcmp (buffer, send_expect.buffer, length) == 0)
    {
        send_expect.buffer = NULL;
        send_expect.length = 0;
    }
    else if (send_expect_array_index < COUNT (send_expect_array)
             && sea->buffer
             && length == sea->length
             && memcmp (buffer, sea->buffer, length) == 0)
    {
        send_expect_array_index++;
    }
    else
    {
        send_unexpected = true;
    }
}

/* Expect a reception activation, reset on activation. */
static bool rx_activate_expect;

/* Expected activation status. */
static bool rx_activate_state_expect;

/* Expect payload receiving status set, reset when done. */
static bool rx_pb_expect;

/* Expected payload receiving status. */
static bool rx_pb_state_expect;

void
lowlevel_activate (sniffer_phy_t *ctx, bool state)
{
    dbg_assert (ctx);
    dbg_assert (rx_activate_expect);
    dbg_assert (state == rx_activate_state_expect);
    rx_activate_expect = false;
}

void
lowlevel_rx_pb (sniffer_phy_t *ctx, bool rx_pb)
{
    dbg_assert (ctx);
    dbg_assert (rx_pb_expect);
    dbg_assert (rx_pb == rx_pb_state_expect);
    rx_pb_expect = false;
}

/* Test unhandled frames reception. */
static void
mme_unhandled_test_case (test_t t, sniffer_phy_t *ctx)
{
    test_case_begin (t, "unhandled");
    /* Drop non MME frames. */
    test_begin (t, "drop frame")
    {
        send_expect.buffer = NULL;
        send_unexpected = false;
        /* Ethertype 0x0806. */
        static const u32 buffer[] = {
            0xffd71300, 0x13003412, 0x4523ffd7, 0x02010608,
            0x06050403, 0x0a090807, 0x0e0d0c0b, 0x0000000f
        };
        const uint length = 29;
        mme_handle (ctx, (u8 *) buffer, length);
        test_fail_if (send_unexpected);
    } test_end;
    /* Drop unknown MME. */
    test_begin (t, "drop mme")
    {
        send_expect.buffer = NULL;
        send_unexpected = false;
        /* MMTYPE = 0x0030. */
        static const u32 buffer[] = {
            0xffd71300, 0x13003412, 0x4523ffd7, 0x3001e188,
            0xee000000, 0xeeeeeeee, 0xeeeeeeee, 0xeeeeeeee
        };
        const uint length = 32;
        mme_handle (ctx, (u8 *) buffer, length);
        test_fail_if (send_unexpected);
    } test_end;
    /* Drop unknown version MME. */
    test_begin (t, "drop mmv")
    {
        send_expect.buffer = NULL;
        send_unexpected = false;
        static const u32 buffer[] = {
            0xffd71300, 0x13003412, 0x4523ffd7, 0x0002e188,
            0xee0000b0, 0xeeeeeeee, 0xee
        };
        const uint length = 25;
        mme_handle (ctx, (u8 *) buffer, length);
        test_fail_if (send_unexpected);
    } test_end;
    /* Drop fragmented MME. */
    test_begin (t, "drop frag")
    {
        send_expect.buffer = NULL;
        send_unexpected = false;
        static const u32 buffer[] = {
            0xffd71300, 0x13003412, 0x4523ffd7, 0x0001e188,
            0xee0001b0, 0xeeeeeeee, 0xee
        };
        const uint length = 25;
        mme_handle (ctx, (u8 *) buffer, length);
        test_fail_if (send_unexpected);
    } test_end;
    /* Drop non Spidcom vendor specific MME. */
    test_begin (t, "drop non spidcom vs")
    {
        send_expect.buffer = NULL;
        send_unexpected = false;
        static const u32 buffer[] = {
            0xffd71300, 0x13003412, 0x4523ffd7, 0x2c01e188,
            0x000000a0, 0x20d813
        };
        const uint length = 23;
        mme_handle (ctx, (u8 *) buffer, length);
        test_fail_if (send_unexpected);
    } test_end;
    /* Drop unknown DRV MME. */
    test_begin (t, "drop unknown drv")
    {
        send_expect.buffer = NULL;
        send_unexpected = false;
        static const u8 drv_mmtype_lsb[] = {
            0x3c, 0x44, 0xf0
        };
        u32 buffer[] = {
            0xffd71300, 0x13003412, 0x4523ffd7, 0x01e188,
            0xee0000b0, 0xeeeeeeee, 0xeeeeeeee, 0xeeeeeeee
        };
        const uint length = 32;
        uint i;
        for (i = 0; i < COUNT (drv_mmtype_lsb); i++)
        {
            buffer[3] = (buffer[3] & 0xffffff) | (drv_mmtype_lsb[i] << 24);
            mme_handle (ctx, (u8 *) buffer, length);
            test_fail_if (send_unexpected);
        }
    } test_end;
    /* Ignore unhandled known DRV MME, but acknowledge them. */
    test_begin (t, "ignore ack drv")
    {
        static const u8 drv_mmtype_lsb[] = {
            0x04, 0x08, 0x14, 0x18, 0x1c, 0x20, 0x24, 0x28, 0x40, 0x48
        };
        u32 buffer[] = {
            0xffd71300, 0x13003412, 0x4523ffd7, 0x01e188,
            0xee0000b0, 0xeeeeeeee, 0xeeeeeeee, 0xeeeeeeee
        };
        const uint length = 32;
        u32 buffer_rsp[] = {
            0xffd71300, 0x13004523, 0x3412ffd7, 0x01e188,
            0x000000b0
        };
        const uint length_rsp = 20;
        uint i;
        for (i = 0; i < COUNT (drv_mmtype_lsb); i++)
        {
            buffer[3] = (buffer[3] & 0xffffff) | (drv_mmtype_lsb[i] << 24);
            buffer_rsp[3] = (buffer_rsp[3] & 0xffffff)
                | ((drv_mmtype_lsb[i] + 1) << 24);
            send_expect.buffer = buffer_rsp;
            send_expect.length = length_rsp;
            send_unexpected = false;
            mme_handle (ctx, (u8 *) buffer, length);
            test_fail_unless (!send_expect.buffer);
            test_fail_if (send_unexpected);
        }
    } test_end;
}

/* Test DRV MME. */
static void
mme_drv_test_case (test_t t, sniffer_phy_t *ctx)
{
    test_case_begin (t, "drv");
    /* DRV_STA_SET_MAC_ADDR. */
    test_begin (t, "set mac addr ok")
    {
        static const u32 buffer[] = {
            0xffd71300, 0x13003412, 0x4523ffd7, 0x0001e188,
            0x000000b0, 0x12ffd713, 0x34
        };
        const uint length = 25;
        static const u32 buffer_rsp[] = {
            0xffd71300, 0x13004523, 0x3412ffd7, 0x0101e188,
            0x000000b0
        };
        const uint length_rsp = 20;
        send_expect.buffer = buffer_rsp;
        send_expect.length = length_rsp;
        send_unexpected = false;
        ctx->mme.mac = 0;
        mme_handle (ctx, (u8 *) buffer, length);
        test_fail_unless (!send_expect.buffer);
        test_fail_if (send_unexpected);
        test_fail_unless (ctx->mme.mac == TEST_MME_MAC);
    } test_end;
    test_begin (t, "set mac addr nok")
    {
        static const u32 buffer[] = {
            0xffd71300, 0x13003412, 0x4523ffd7, 0x0001e188,
            0xee0000b0, 0xeeeeeeee
        };
        const uint length = 24;
        send_unexpected = false;
        mme_handle (ctx, (u8 *) buffer, length);
        test_fail_if (send_unexpected);
        test_fail_unless (ctx->mme.mac == TEST_MME_MAC);
    } test_end;
}


/**
 * Perform one sniffer MME test.
 * \param  t  test context
 * \param  ctx  sniffer context
 * \param  test_name  test to be passed
 * \param  s_sa  request source address
 * \param  s_command  request command or 0xff for short MME
 * \param  r_result  response result
 * \param  r_status  response status
 * \param  r_da  response destination address
 * \param  rx_activate  is reception state changed
 * \param  rx_activate_state  new reception state
 * \param  sniffer_before  sniffer peer before the MME
 * \param  sniffer_after  sniffer peer after the MME.
 * \param  pb_before  PB sniffer state before the MME
 * \param  pb_after  PB sniffer state after the MME.
 */
static void
mme_sniffer_test (test_t t, sniffer_phy_t *ctx, const char *test_name,
                  mac_t s_sa, u8 s_command,
                  u8 r_result, u8 r_status, mac_t r_da,
                  bool rx_activate, bool rx_activate_state,
                  bool rx_pb, bool rx_pb_state,
                  mac_t sniffer_before, mac_t sniffer_after,
                  bool pb_before, bool pb_after)
{
    test_begin (t, test_name)
    {
        ctx->mme.mac_sniffer = sniffer_before;
        ctx->mme.pb = pb_before;
        u32 buffer[] = {
            TEST_MME_MAC & 0xffffffff,
            TEST_MME_MAC >> 32 | (s_sa & 0xffff) << 16,
            s_sa >> 16,
            0x2c01e188,
            0x000000a0,
            0xd713 | s_command << 16
        };
        const uint length = s_command != 0xff ? 23 : 22;
        u32 buffer_rsp[] = {
            s_sa & 0xffffffff,
            s_sa >> 32 | (TEST_MME_MAC & 0xffff) << 16,
            TEST_MME_MAC >> 16,
            0x2d01e188,
            0x000000a0,
            0xd713 | r_result << 16 | r_status << 24,
            r_da & 0xffffffff,
            r_da >> 32
        };
        const uint length_rsp = 30;
        if (s_command != 0xff)
        {
            send_expect.buffer = buffer_rsp;
            send_expect.length = length_rsp;
        }
        else
        {
            send_expect.buffer = NULL;
            send_expect.length = 0;
        }
        send_unexpected = false;
        rx_activate_expect = rx_activate;
        rx_activate_state_expect = rx_activate_state;
        rx_pb_expect = rx_pb;
        rx_pb_state_expect = rx_pb_state;
        mme_handle (ctx, (u8 *) buffer, length);
        test_fail_unless (!send_expect.buffer);
        test_fail_if (send_unexpected);
        test_fail_unless (!rx_activate_expect);
        test_fail_unless (!rx_pb_expect);
        test_fail_unless (ctx->mme.mac_sniffer == sniffer_after);
        test_fail_unless (ctx->mme.pb == pb_after);
    } test_end;
}

/* Test sniffer MME. */
static void
mme_sniffer_test_case (test_t t, sniffer_phy_t *ctx)
{
    test_case_begin (t, "sniffer");
    /* VS_SNIFFER.REQ. */
    mme_sniffer_test (t, ctx, "req subscribe ok",
                      TEST_MME_MAC_PEER, 0x20,
                      0x00, 0x20, TEST_MME_MAC_PEER,
                      true, true, true, false,
                      0, TEST_MME_MAC_PEER,
                      false, false);
    mme_sniffer_test (t, ctx, "req subscribe again ok",
                      TEST_MME_MAC_PEER, 0x20,
                      0x00, 0x20, TEST_MME_MAC_PEER,
                      false, false, true, false,
                      TEST_MME_MAC_PEER, TEST_MME_MAC_PEER,
                      false, false);
    mme_sniffer_test (t, ctx, "req subscribe change ok",
                      TEST_MME_MAC_PEER, 0xa0,
                      0x00, 0xa0, TEST_MME_MAC_PEER,
                      false, false, true, true,
                      TEST_MME_MAC_PEER, TEST_MME_MAC_PEER,
                      false, true);
    mme_sniffer_test (t, ctx, "req subscribe another nok",
                      TEST_MME_MAC_OTHER, 0x20,
                      0x01, 0xa0, TEST_MME_MAC_PEER,
                      false, false, false, false,
                      TEST_MME_MAC_PEER, TEST_MME_MAC_PEER,
                      true, true);
    mme_sniffer_test (t, ctx, "req unsubscribe another nok",
                      TEST_MME_MAC_OTHER, 0x00,
                      0x01, 0xa0, TEST_MME_MAC_PEER,
                      false, false, false, false,
                      TEST_MME_MAC_PEER, TEST_MME_MAC_PEER,
                      true, true);
    mme_sniffer_test (t, ctx, "req unsubscribe ok",
                      TEST_MME_MAC_PEER, 0x00,
                      0x00, 0x00, 0,
                      true, false, true, false,
                      TEST_MME_MAC_PEER, 0,
                      true, false);
    mme_sniffer_test (t, ctx, "req bad command",
                      TEST_MME_MAC_PEER, 0x10,
                      0x01, 0x00, 0,
                      false, false, false, false,
                      0, 0,
                      false, false);
    mme_sniffer_test (t, ctx, "req bad mme",
                      TEST_MME_MAC_PEER, 0xff,
                      0x01, 0x00, 0,
                      false, false, false, false,
                      0, 0,
                      false, false);
}

static void
mme_mpdu_test (test_t t, sniffer_phy_t *ctx, const char *test_name,
               bool activated,
               bool fc10_bad_crc, bool fc_bad_crc)
{
    test_begin (t, test_name)
    {
        ctx->mme.mac_sniffer = activated ? TEST_MME_MAC_PEER : 0;
        ctx->mme.pb = false;
        lowlevel_rx_t rx = {
            0x12345678, fc10_bad_crc ? 0xffffffff : 0x01234567,
            {
                fc_bad_crc ? 0xffffffff : 0x11223344,
                fc_bad_crc ? 0xffffffff : 0x55667788,
                fc_bad_crc ? 0xffffffff : 0x99aabbcc,
                fc_bad_crc ? 0xffffffff : 0xddeeff00
            },
            fc10_bad_crc, fc_bad_crc, false, NULL, INVALID_PTR, 0
        };
        u32 buffer[] = {
            0xffd71300, 0x13004523, 0x3412ffd7, 0x2e01e188,
            0x000000a0,
            0x0102d713,
            (fc10_bad_crc ? 0x0001 : 0)
                | (fc_bad_crc ? 0x0002 : 0),
            rx.date,
            fc10_bad_crc ? 0xffffffff : rx.fc10,
            fc_bad_crc ? 0xffffffff : rx.fc[0],
            fc_bad_crc ? 0xffffffff : rx.fc[1],
            fc_bad_crc ? 0xffffffff : rx.fc[2],
            fc_bad_crc ? 0xffffffff : rx.fc[3]
        };
        const uint length = 52;
        if (activated)
        {
            send_expect.buffer = buffer;
            send_expect.length = length;
        }
        else
        {
            send_expect.buffer = NULL;
            send_expect.length = 0;
        }
        send_unexpected = false;
        mme_report_mpdu (ctx, &rx);
        test_fail_unless (!send_expect.buffer);
        test_fail_if (send_unexpected);
    } test_end;
}

static void
mme_mpdu_pb_test (test_t t, sniffer_phy_t *ctx, const char *test_name,
                  uint pb_nb, u32 pb_bad_crc, bool pb136)
{
    dbg_assert (pb_nb <= COUNT (send_expect_array));
    dbg_assert (!DEFS_BIG_ENDIAN);
    blk_t *blk_first = NULL, *blk_last;
    test_begin (t, test_name)
    {
        ctx->mme.mac_sniffer = TEST_MME_MAC_PEER;
        ctx->mme.pb = true;
        send_expect_array_index = 0;
        u32 buffers[pb_nb][14 + 128];
        uint pb;
        blk_first = blk_alloc_desc_range (pb_nb, &blk_last);
        pb_t *p = PB_FROM_BLK (blk_first);
        lowlevel_rx_t rx = {
            0x12345678, 0x01234567, { 0x11223344, 0x55667788, 0x99aabbcc,
                0xddeeff00 }, false, false,
            pb136 ? PHY_PB_SIZE_136 : PHY_PB_SIZE_520,
            PB_FROM_BLK (blk_first), PB_FROM_BLK (blk_last), pb_nb
        };
        for (pb = 0; pb < pb_nb; pb++)
        {
            /* Prepare PB. */
            p->phy_pb.pb_rx.header = 0x01234567 + pb;
            p->phy_pb.pb_rx.pb_measurement.crc_error =
                !!(pb_bad_crc & (1 << pb));
            memset (p->phy_pb.pb_rx.blk.data, 1 + pb, 512);
            p = p->next;
            /* Prepare response. */
            u32 buffer[] = {
                0xffd71300, 0x13004523, 0x3412ffd7, 0x2e01e188,
                0x000000a0, 0x0102d713,
                (pb_bad_crc & (1 << pb) ? 0x0004 : 0)
                    | pb_nb << 16 | pb << 24,
                rx.date, rx.fc10,
                rx.fc[0], rx.fc[1], rx.fc[2], rx.fc[3]
            };
            uint length = 52;
            dbg_assert (COUNT (buffer) == 13);
            memcpy (buffers[pb], buffer, length);
            if (!(pb_bad_crc & (1 << pb)))
            {
                buffers[pb][13] = 0x01234567 + pb;
                memset (&buffers[pb][14], 1 + pb, 512);
                length += 4 + (pb136 ? 128 : 512);
            }
            send_expect_array[send_expect_array_index].buffer = buffers[pb];
            send_expect_array[send_expect_array_index].length = length;
            send_expect_array_index++;
        }
        /* Test. */
        send_expect_array_index = 0;
        send_unexpected = false;
        mme_report_mpdu (ctx, &rx);
        test_fail_unless (send_expect_array_index == pb_nb,
                          "MPDU %d not received", send_expect_array_index);
        test_fail_if (send_unexpected);
    } test_end;
    if (blk_first)
        blk_release_desc_range (blk_first, blk_last);
    memset (send_expect_array, 0, sizeof (send_expect_array));
    send_expect_array_index = COUNT (send_expect_array);
}

/* Test sending MPDU MME. */
static void
mme_mpdu_test_case (test_t t, sniffer_phy_t *ctx)
{
    test_case_begin (t, "mpdu");
    mme_mpdu_test (t, ctx, "not active", false, false, false);
    mme_mpdu_test (t, ctx, "fc 10 ok av ok", true, false, false);
    mme_mpdu_test (t, ctx, "fc 10 ko av ok", true, true, false);
    mme_mpdu_test (t, ctx, "fc 10 ok av ko", true, false, true);
    mme_mpdu_test (t, ctx, "fc 10 ko av ko", true, true, true);
    mme_mpdu_pb_test (t, ctx, "pb 136", 1, 0, true);
    mme_mpdu_pb_test (t, ctx, "pb 512", 1, 0, false);
    mme_mpdu_pb_test (t, ctx, "pb 512 x2", 2, 0, false);
    mme_mpdu_pb_test (t, ctx, "pb 512 x10", 10, 0, false);
    mme_mpdu_pb_test (t, ctx, "pb 512 x32", 32, 0, false);
    mme_mpdu_pb_test (t, ctx, "pb 136 ko", 1, 0x1, true);
    mme_mpdu_pb_test (t, ctx, "pb 512 ko", 1, 0x1, false);
    mme_mpdu_pb_test (t, ctx, "pb 512 x2 ko", 2, 0x3, false);
    mme_mpdu_pb_test (t, ctx, "pb 512 x10 ko mix", 10, 0x2a5, false);
    mme_mpdu_pb_test (t, ctx, "pb 512 x32 ko mix", 32, 0xa55a137f, false);
}

void
mme_test_suite (test_t t)
{
    test_suite_begin (t, "mme");
    sniffer_phy_t ctx;
    mme_init (&ctx);
    ctx.mme.mac = TEST_MME_MAC;
    ctx.mme.mac_sniffer = TEST_MME_MAC_PEER;
    ctx.mme.pb = false;
    mme_unhandled_test_case (t, &ctx);
    mme_drv_test_case (t, &ctx);
    mme_sniffer_test_case (t, &ctx);
    mme_mpdu_test_case (t, &ctx);
}

int
main (int argc, char **argv)
{
    test_t t;
    test_init (t, argc, argv);
    mme_test_suite (t);
    test_result (t);
    return test_nb_failed (t) == 0 ? 0 : 1;
}