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/* Cesar project {{{
 *
 * Copyright (C) 2008 Spidcom
 *
 * <<<Licence>>>
 *
 * }}} */
/**
 * \file    cp/src/trace.c
 * \brief   Define CP trace events.
 * \ingroup cp
 */
#include "common/std.h"

#include <string.h>

#include "cp/inc/context.h"
#include "cp/fsm/inc/tables.h"
#include "cp/msg/inc/allowed_mme.h"
#include "ce/tx/mme.h"

/**
 * Table to associate an MME error code and its string translation.
 */
const char *cp_trace_ce_tx_mme_error_code_table[] =
{
    "CE_TX_MME_OK",
    "CE_TX_MME_BROADCAST",
    "CE_TX_MME_UNKNOWN_STA",
    "CE_TX_MME_HEADER",
    "CE_TX_MME_TMI_LIST",
    "CE_TX_MME_DEFAULT_TMI_DISABLED",
    "CE_TX_MME_DEFAULT_TMI",
    "CE_TX_MME_INTERVAL",
    "CE_TX_MME_NEW_TMI",
    "CE_TX_MME_NEW_TMI_DISABLED",
    "CE_TX_MME_BAD_TM",
    "CE_TX_MME_NEW_TMI_ROBO",
    "CE_TX_MME_TOO_SHORT",
    "CE_TX_MME_OLD_TMI",
    "UNKNOWN",
};

/**
 * Format a FSM state.
 * \see trace_format_t.
 */
static int
cp_trace_format_fsm_state (char *text, uint text_size, int data)
{
    const char *state_name;
    if (data < 0 || data >= CP_FSM_STATE_NB)
        state_name = "UNKNOWN";
    else
        state_name = cp_fsm_state_names_table[data];
    uint state_name_len = strlen (state_name);
    if (state_name_len > text_size)
        return -1;
    else
    {
        memcpy (text, state_name, state_name_len);
        return state_name_len;
    }
}

/**
 * Format a FSM event.
 * \see trace_format_t.
 */
static int
cp_trace_format_fsm_event (char *text, uint text_size, int data)
{
    const char *event_name;
    if (data < 0 || data >= CP_FSM_EVENT_TYPE_NB)
        event_name = "UNKNOWN";
    else
        event_name = cp_fsm_event_names_table[data];
    uint event_name_len = strlen (event_name);
    if (event_name_len > text_size)
        return -1;
    else
    {
        memcpy (text, event_name, event_name_len);
        return event_name_len;
    }
}

/**
 * Format an MMType.
 * \see trace_format_t.
 */
static int
cp_trace_format_mmtype (char *text, uint text_size, int data)
{
    const char *mmtype_name = "UNKNOWN";

    /* Try to find the MMType. */
    uint i;
    cp_mmtype_t mmtype = data;
    DICHOTOMY_SEARCH (0, cp_msg_mme_allowed_count, i,
                      mmtype <= cp_msg_mme_allowed[i].mmtype);

    /* If found. */
    if ((i < cp_msg_mme_allowed_count)
        && (mmtype == cp_msg_mme_allowed[i].mmtype))
        mmtype_name = cp_msg_mme_allowed[i].mmtype_name;

    /* Copy if we can. */
    uint mmtype_name_len = strlen (mmtype_name);
    if (mmtype_name_len > text_size)
        return -1;
    else
    {
        memcpy (text, mmtype_name, mmtype_name_len);
        return mmtype_name_len;
    }
}

/**
 * Format an error of CE MME.
 * \see trace_format_t.
 */
static int
cp_trace_format_ce_mme_error (char *text, uint text_size, int data)
{
    const char *error_name;

    /* Handle unknown error. */
    if (data > CE_TX_MME_NB || data < 0)
        data = CE_TX_MME_NB;

    /* Sanity check. */
    dbg_assert (COUNT (cp_trace_ce_tx_mme_error_code_table)
                == CE_TX_MME_NB + 1);
    dbg_assert ((uint) data <= COUNT (cp_trace_ce_tx_mme_error_code_table));
    /* Get error message. */
    error_name = cp_trace_ce_tx_mme_error_code_table[data];

    /* Copy if we can. */
    uint error_name_len = strlen (error_name);
    if (error_name_len > text_size)
        return -1;
    else
    {
        memcpy (text, error_name, error_name_len);
        return error_name_len;
    }
}

void
cp_trace_init (cp_t *ctx)
{
    static trace_namespace_t namespace;
    static const trace_event_id_t event_ids[] =
    {
        TRACE_EVENT (CP_TRACE_FSM_POST, "fsm post <%E>"),
        TRACE_EVENT (CP_TRACE_FSM_TRIGGER, "fsm trigger <%E>"),
        TRACE_EVENT (CP_TRACE_FSM_POST_URGENT, "fsm post urgent <%E>"),
        TRACE_EVENT (CP_TRACE_FSM_HANDLE_EVENT, "fsm handle <%E>"),
        TRACE_EVENT (CP_TRACE_FSM_HANDLE_URGENT_EVENT,
                     "fsm handle urgent <%E>"),
        TRACE_EVENT (CP_TRACE_FSM_CHANGE_STATE, "fsm %S => %S"),
        TRACE_EVENT (CP_TRACE_MME_ERROR_IND,
                     "mme error ind tei %d reason %d mmv %d mmtype %d offset %d"),
        TRACE_EVENT (CP_TRACE_BEACON_UNPACK_ERROR,
                     "Beacon Error, nid : %x, , snid : %x, stei : %x, bt : %x, bts : %x",
                     TIMESTAMP),
        TRACE_EVENT (CP_TRACE_BEACON_BEACON_PROCESS,
                     "Beacon processing, nid : %x, snid : %x, stei : %x, bt : %x, bts : %x",
                     TIMESTAMP),
        TRACE_EVENT (CP_TRACE_MSG_DISPATCH, "[MSG] receive %M from %d",
                     TIMESTAMP),
        TRACE_EVENT (CP_TRACE_MSG_DISPATCH_DROP, "[MSG] drop %M from %d",
                     TIMESTAMP),
        TRACE_EVENT (CP_TRACE_MSG_SEND, "[MSG] send %M to %d",
                     TIMESTAMP),
        TRACE_EVENT (CP_TRACE_CL_INTERF_PROCESS_MME,
                     "[CL Interf] PROCESS MME buffer : %x, length : %d, tei : %x, FMI %x",
                     TIMESTAMP),
        TRACE_EVENT (CP_TRACE_CL_INTERF_MME_NOT_CORRECT,
                     "[CL Interf] MME NOT CORRECT buffer : %x"),
        TRACE_EVENT (CP_TRACE_CL_INTERF_GET_BUFFER_TX,
                     "[CL Interf] GET BUFFER TX buffer : %x", TIMESTAMP),
        TRACE_EVENT (CP_TRACE_CL_INTERF_MME_SEND,
                     "[CL Interf] MME SEND buffer : %x, length : %d, tei : %x"),
        TRACE_EVENT (CP_TRACE_CL_INTERF_BUFFER_ADD,
                     "[CL Interf] BUFFER ADD buffer : %x"),
        TRACE_EVENT (CP_TRACE_CL_INTERF_MME_RX,
                     "[CL Interf] MME RX buffer : %x, length : %d",
                     TIMESTAMP),
        TRACE_EVENT (CP_TRACE_CL_INTERF_MME_RX_DROP,
                     "[CL Interf] MME RX DROPPED buffer : %x, length : %d, mac: %m",
                     TIMESTAMP),
        TRACE_EVENT (CP_TRACE_CCO_ASSOC, "[CCo] Assoc, Mac addr : %m, tei : %x"),
        TRACE_EVENT (CP_TRACE_CCO_ASSOC_RENEW,
                     "[CCo] Assoc renew, Mac addr : %m, tei : %x"),
        TRACE_EVENT (CP_TRACE_CCO_TEI_EXPIRED,
                     "[CCo] tei expired, Mac addr : %m, tei : %x"),
        TRACE_EVENT (CP_TRACE_CE_TX_NEW_TONEMAP, "[ce_tx] New tonemap "
                     "attached %d"),
        TRACE_EVENT (CP_TRACE_CE_TX_NEW_DEFAULT_TMI, "[ce_tx] New default"
                     "tmi %d"),
        TRACE_EVENT (CP_TRACE_CE_TX_MME_CHAN_EST_ERROR,
                     "[ce_tx] Error in CM_CHAN_EST at %Z"),
        TRACE_EVENT (CP_TRACE_CE_TX_MME_TM_UPDATE_ERROR,
                     "[ce_tx] Error in CM_CHAN_EST at %Z"),
        TRACE_EVENT (CP_TRACE_SPOC, "SPOC compute with rho_q30 %x"),
    };
    dbg_assert (ctx);
    trace_namespace_init (&namespace, event_ids, COUNT (event_ids));
    trace_namespace_register_format (&namespace, 'S',
                                     cp_trace_format_fsm_state);
    trace_namespace_register_format (&namespace, 'E',
                                     cp_trace_format_fsm_event);
    trace_namespace_register_format (&namespace, 'M',
                                     cp_trace_format_mmtype);
    trace_namespace_register_format (&namespace, 'Z',
                                     cp_trace_format_ce_mme_error);
    trace_buffer_add (&ctx->trace, "cp", 8, 1, false, &namespace);
    trace_buffer_add (&ctx->trace_verbose, "cp-verbose", 8, 8, true, &namespace);
}

void
cp_trace_uninit (cp_t *ctx)
{
    dbg_assert (ctx);
    trace_buffer_remove (&ctx->trace_verbose);
    trace_buffer_remove (&ctx->trace);
}