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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* Copyright (C) 2013 Red Hat, Inc.
*
* This program is free software: you can redistribute it and/or
* modify it under the terms of version 2 of the GNU General Public
* License as published by the Free Software Foundation
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <string.h>
#include <stdlib.h>
#include <endian.h>
#include <sys/param.h>
#include "log-items.h"
#include "errors.h"
#include "dm-commands.h"
#include "dm-log-items.h"
#include "result-private.h"
#include "commands-private.h"
#include "utils.h"
/**********************************************************************/
static qcdmbool
check_log_item (const char *buf, size_t len, u_int16_t log_code, size_t min_len, int *out_error)
{
DMCmdLog *log = (DMCmdLog *) buf;
if (len < sizeof (DMCmdLog)) {
qcdm_err (0, "DM command response malformed (must be at least 1 byte in length)");
if (out_error)
*out_error = -QCDM_ERROR_RESPONSE_MALFORMED;
return FALSE;
}
/* Make sure it's a log item */
if (log->code != 0x10) {
qcdm_err (0, "Not a log item (expected 0x10, got %d)", log->code);
if (out_error)
*out_error = -QCDM_ERROR_RESPONSE_UNEXPECTED;
return FALSE;
}
/* Make sure it's the log item we want */
if (log_code && (log->log_code != log_code)) {
qcdm_err (0, "Not the expected log item (expected %d, got %d)", log_code, log->log_code);
if (out_error)
*out_error = -QCDM_ERROR_RESPONSE_UNEXPECTED;
return FALSE;
}
if (len < min_len) {
qcdm_err (0, "Log item %d response not long enough (got %zu, expected "
"at least %zu).", log_code, len, min_len);
if (out_error)
*out_error = -QCDM_ERROR_RESPONSE_BAD_LENGTH;
return FALSE;
}
return TRUE;
}
qcdmbool
qcdm_is_log_item (const char *buf, size_t len, u_int16_t log_code)
{
return check_log_item (buf, len, log_code, sizeof (DMCmdLog), NULL);
}
u_int16_t
qcdm_get_log_item_code (const char *buf, size_t len)
{
if (check_log_item (buf, len, 0, sizeof (DMCmdLog), NULL))
return le16toh (((DMCmdLog *) buf)->log_code);
return 0;
}
/**********************************************************************/
#define ACTIVE_CHANNEL "active-channel"
QcdmResult *
qcdm_log_item_evdo_pilot_sets_v2_result (const char *buf, size_t len, int *out_error)
{
QcdmResult *result = NULL;
DMLogItemEvdoPilotSetsV2 *log = (DMLogItemEvdoPilotSetsV2 *) buf;
size_t sets_len;
qcdm_return_val_if_fail (buf != NULL, NULL);
if (!check_log_item (buf, len, DM_LOG_ITEM_EVDO_PILOT_SETS_V2, sizeof (DMLogItemEvdoPilotSetsV2), out_error))
return NULL;
result = qcdm_result_new ();
qcdm_result_add_u32 (result, QCDM_LOG_ITEM_EVDO_PILOT_SETS_V2_PN_OFFSET, log->pn_offset);
qcdm_result_add_u32 (result, ACTIVE_CHANNEL, le16toh (log->active_channel));
qcdm_result_add_u32 (result, QCDM_LOG_ITEM_EVDO_PILOT_SETS_V2_ACTIVE_SET_WINDOW, log->active_window);
qcdm_result_add_u32 (result, QCDM_LOG_ITEM_EVDO_PILOT_SETS_V2_CANDIDATE_SET_WINDOW, log->candidate_window);
qcdm_result_add_u32 (result, QCDM_LOG_ITEM_EVDO_PILOT_SETS_V2_NEIGHBOR_SET_WINDOW, log->neighbor_window);
sets_len = log->active_count * sizeof (DMLogItemEvdoPilotSetsV2PilotActive);
if (sets_len > 0) {
qcdm_result_add_u8_array (result,
PILOT_SET_ACTIVE,
(const u_int8_t *) &log->sets[0],
sets_len);
}
sets_len = log->candidate_count * sizeof (DMLogItemEvdoPilotSetsV2PilotCandidate);
if (sets_len > 0) {
qcdm_result_add_u8_array (result,
PILOT_SET_CANDIDATE,
(const u_int8_t *) &log->sets[log->active_count],
sets_len);
}
sets_len = log->neighbor_count * sizeof (DMLogItemEvdoPilotSetsV2PilotNeighbor);
if (sets_len > 0) {
qcdm_result_add_u8_array (result,
PILOT_SET_NEIGHBOR,
(const u_int8_t *) &log->sets[log->active_count + log->candidate_count],
sets_len);
}
return result;
}
qcdmbool
qcdm_log_item_evdo_pilot_sets_v2_result_get_num (QcdmResult *result,
u_int32_t set_type,
u_int32_t *out_num)
{
const char *set_name;
const u_int8_t *array = NULL;
size_t array_len = 0;
qcdm_return_val_if_fail (result != NULL, FALSE);
set_name = pilot_set_num_to_str (set_type);
qcdm_return_val_if_fail (set_name != NULL, FALSE);
if (qcdm_result_get_u8_array (result, set_name, &array, &array_len))
return FALSE;
/* we use Active here, but all the pilot type structs are the same size */
*out_num = array_len / sizeof (DMLogItemEvdoPilotSetsV2PilotActive);
return TRUE;
}
qcdmbool
qcdm_log_item_evdo_pilot_sets_result_get_pilot (QcdmResult *result,
u_int32_t set_type,
u_int32_t num,
u_int32_t *out_pilot_pn,
u_int32_t *out_energy,
float *out_ecio_db,
u_int32_t *out_band_class,
u_int32_t *out_channel,
u_int32_t *out_window_center)
{
const char *set_name;
DMLogItemEvdoPilotSetsV2Pilot *set;
const u_int8_t *array = NULL;
size_t array_len = 0;
u_int32_t pilot_pn;
u_int32_t energy;
u_int32_t channel = 0;
u_int32_t window_center;
qcdm_return_val_if_fail (result != NULL, FALSE);
set_name = pilot_set_num_to_str (set_type);
qcdm_return_val_if_fail (set_name != NULL, FALSE);
if (qcdm_result_get_u8_array (result, set_name, &array, &array_len))
return FALSE;
qcdm_return_val_if_fail (num < array_len / sizeof (DMLogItemEvdoPilotSetsV2Pilot), FALSE);
set = (DMLogItemEvdoPilotSetsV2Pilot *) &array[num * sizeof (DMLogItemEvdoPilotSetsV2Pilot)];
if (set_type == QCDM_PILOT_SET_TYPE_ACTIVE) {
pilot_pn = le16toh (set[num].u.active.pilot_pn);
energy = le16toh (set[num].u.active.energy);
qcdm_result_get_u32 (result, ACTIVE_CHANNEL, &channel);
window_center = le16toh (set[num].u.active.window_center);
} else if (set_type == QCDM_PILOT_SET_TYPE_CANDIDATE) {
pilot_pn = le16toh (set[num].u.candidate.pilot_pn);
energy = le16toh (set[num].u.candidate.energy);
channel = le16toh (set[num].u.candidate.channel);
window_center = le16toh (set[num].u.candidate.window_center);
} else if (set_type == QCDM_PILOT_SET_TYPE_NEIGHBOR) {
pilot_pn = le16toh (set[num].u.neighbor.pilot_pn);
energy = le16toh (set[num].u.neighbor.energy);
channel = le16toh (set[num].u.neighbor.channel);
window_center = le16toh (set[num].u.neighbor.window_center);
} else
qcdm_assert_not_reached ();
if (out_pilot_pn)
*out_pilot_pn = pilot_pn;
if (out_band_class)
*out_band_class = cdma_band_class_to_qcdm (DM_LOG_ITEM_EVDO_PILOT_SETS_V2_GET_BAND_CLASS (channel));
if (out_channel)
*out_channel = DM_LOG_ITEM_EVDO_PILOT_SETS_V2_GET_CHANNEL (channel);
if (out_window_center)
*out_window_center = window_center;
/* Log item pilot energy is in units from 0 (bad signal) to 400+ (excellent
* signal), derived by walking around and correlating active pilot energy
* from this log item to the RSSI from continuous Novatel Snapshot requests.
*/
if (out_energy)
*out_energy = energy;
/* EC/IO (measured in dBm) is not received signal strength; it's an SnR
* measurement. Less (-32) = worse, high (0) = better.
*/
#define BEST_ENERGY 400
#define WORST_ECIO 32.0
if (out_ecio_db)
*out_ecio_db = WORST_ECIO - (((float) MIN (energy, BEST_ENERGY) * WORST_ECIO) / (float) BEST_ENERGY);
return TRUE;
}
/**********************************************************************/
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