void configure_gateway(void) {
/* configuration file related */
const char global_conf_fname[] = "global_conf.json"; /* contain global (typ. network-wide) configuration */
const char local_conf_fname[] = "local_conf.json"; /* contain node specific configuration, overwrite global parameters for parameters that are defined in both */
const char debug_conf_fname[] = "debug_conf.json"; /* if present, all other configuration files are ignored */
/* configuration files management */
if (access(debug_conf_fname, R_OK) == 0) {
/* if there is a debug conf, parse only the debug conf */
MSG("INFO: found debug configuration file %s, other configuration files will be ignored\n", debug_conf_fname);
parse_SX1301_configuration(debug_conf_fname);
parse_gateway_configuration(debug_conf_fname);
} else if (access(global_conf_fname, R_OK) == 0) {
/* if there is a global conf, parse it and then try to parse local conf */
MSG("INFO: found global configuration file %s, trying to parse it\n", global_conf_fname);
parse_SX1301_configuration(global_conf_fname);
parse_gateway_configuration(global_conf_fname);
if (access(local_conf_fname, R_OK) == 0) {
MSG("INFO: found local configuration file %s, trying to parse it\n", local_conf_fname);
parse_SX1301_configuration(local_conf_fname);
parse_gateway_configuration(local_conf_fname);
}
} else if (access(local_conf_fname, R_OK) == 0) {
/* if there is only a local conf, parse it and that's all */
MSG("INFO: found local configuration file %s, trying to parse it\n", local_conf_fname);
parse_SX1301_configuration(local_conf_fname);
parse_gateway_configuration(local_conf_fname);
} else {
MSG("ERROR: failed to find any configuration file named %s, %s or %s\n", global_conf_fname, local_conf_fname, debug_conf_fname);
exit(EXIT_FAILURE);
}
}
int main(int argc, char **argv)
{
int i, j; /* loop and temporary variables */
struct timespec sleep_time = {0, 3000000}; /* 3 ms */
/* clock and log rotation management */
int log_rotate_interval = 3600; /* by default, rotation every hour */
int time_check = 0; /* variable used to limit the number of calls to time() function */
unsigned long pkt_in_log = 0; /* count the number of packet written in each log file */
/* configuration file related */
const char global_conf_fname[] = "global_conf.json"; /* contain global (typ. network-wide) configuration */
const char local_conf_fname[] = "local_conf.json"; /* contain node specific configuration, overwrite global parameters for parameters that are defined in both */
const char debug_conf_fname[] = "debug_conf.json"; /* if present, all other configuration files are ignored */
/* allocate memory for packet fetching and processing */
struct lgw_pkt_rx_s rxpkt[16]; /* array containing up to 16 inbound packets metadata */
struct lgw_pkt_rx_s *p; /* pointer on a RX packet */
int nb_pkt;
/* local timestamp variables until we get accurate GPS time */
struct timespec fetch_time;
char fetch_timestamp[30];
struct tm * x;
/* parse command line options */
while ((i = getopt (argc, argv, "hr:")) != -1) {
switch (i) {
case 'h':
usage();
return EXIT_FAILURE;
break;
case 'r':
log_rotate_interval = atoi(optarg);
if ((log_rotate_interval == 0) || (log_rotate_interval < -1)) {
MSG( "ERROR: Invalid argument for -r option\n");
return EXIT_FAILURE;
}
break;
default:
MSG("ERROR: argument parsing use -h option for help\n");
usage();
return EXIT_FAILURE;
}
}
/* configure signal handling */
sigemptyset(&sigact.sa_mask);
sigact.sa_flags = 0;
sigact.sa_handler = sig_handler;
sigaction(SIGQUIT, &sigact, NULL);
sigaction(SIGINT, &sigact, NULL);
sigaction(SIGTERM, &sigact, NULL);
/* configuration files management */
if (access(debug_conf_fname, R_OK) == 0) {
/* if there is a debug conf, parse only the debug conf */
MSG("INFO: found debug configuration file %s, other configuration files will be ignored\n", debug_conf_fname);
parse_SX1301_configuration(debug_conf_fname);
parse_gateway_configuration(debug_conf_fname);
} else if (access(global_conf_fname, R_OK) == 0) {
/* if there is a global conf, parse it and then try to parse local conf */
MSG("INFO: found global configuration file %s, trying to parse it\n", global_conf_fname);
parse_SX1301_configuration(global_conf_fname);
parse_gateway_configuration(global_conf_fname);
if (access(local_conf_fname, R_OK) == 0) {
MSG("INFO: found local configuration file %s, trying to parse it\n", local_conf_fname);
parse_SX1301_configuration(local_conf_fname);
parse_gateway_configuration(local_conf_fname);
}
} else if (access(local_conf_fname, R_OK) == 0) {
/* if there is only a local conf, parse it and that's all */
MSG("INFO: found local configuration file %s, trying to parse it\n", local_conf_fname);
parse_SX1301_configuration(local_conf_fname);
parse_gateway_configuration(local_conf_fname);
} else {
MSG("ERROR: failed to find any configuration file named %s, %s or %s\n", global_conf_fname, local_conf_fname, debug_conf_fname);
return EXIT_FAILURE;
}
/* starting the concentrator */
i = lgw_start();
if (i == LGW_HAL_SUCCESS) {
MSG("INFO: concentrator started, packet can now be received\n");
} else {
MSG("ERROR: failed to start the concentrator\n");
return EXIT_FAILURE;
}
/* transform the MAC address into a string */
sprintf(lgwm_str, "%08X%08X", (uint32_t)(lgwm >> 32), (uint32_t)(lgwm & 0xFFFFFFFF));
/* opening log file and writing CSV header*/
time(&now_time);
open_log();
/* main loop */
while ((quit_sig != 1) && (exit_sig != 1)) {
/* fetch packets */
nb_pkt = lgw_receive(ARRAY_SIZE(rxpkt), rxpkt);
if (nb_pkt == LGW_HAL_ERROR) {
MSG("ERROR: failed packet fetch, exiting\n");
return EXIT_FAILURE;
} else if (nb_pkt == 0) {
clock_nanosleep(CLOCK_MONOTONIC, 0, &sleep_time, NULL); /* wait a short time if no packets */
} else {
/* local timestamp generation until we get accurate GPS time */
clock_gettime(CLOCK_REALTIME, &fetch_time);
x = gmtime(&(fetch_time.tv_sec));
sprintf(fetch_timestamp,"%04i-%02i-%02i %02i:%02i:%02i.%03liZ",(x->tm_year)+1900,(x->tm_mon)+1,x->tm_mday,x->tm_hour,x->tm_min,x->tm_sec,(fetch_time.tv_nsec)/1000000); /* ISO 8601 format */
}
/* log packets */
for (i=0; i < nb_pkt; ++i) {
p = &rxpkt[i];
/* writing gateway ID */
fprintf(log_file, "\"%08X%08X\",", (uint32_t)(lgwm >> 32), (uint32_t)(lgwm & 0xFFFFFFFF));
/* writing node MAC address */
fputs("\"\",", log_file); // TODO: need to parse payload
/* writing UTC timestamp*/
fprintf(log_file, "\"%s\",", fetch_timestamp);
// TODO: replace with GPS time when available
/* writing internal clock */
fprintf(log_file, "%10u,", p->count_us);
/* writing RX frequency */
fprintf(log_file, "%10u,", p->freq_hz);
/* writing RF chain */
fprintf(log_file, "%u,", p->rf_chain);
/* writing RX modem/IF chain */
fprintf(log_file, "%2d,", p->if_chain);
/* writing status */
switch(p->status) {
case STAT_CRC_OK: fputs("\"CRC_OK\" ,", log_file); break;
case STAT_CRC_BAD: fputs("\"CRC_BAD\",", log_file); break;
case STAT_NO_CRC: fputs("\"NO_CRC\" ,", log_file); break;
case STAT_UNDEFINED:fputs("\"UNDEF\" ,", log_file); break;
default: fputs("\"ERR\" ,", log_file);
}
/* writing payload size */
fprintf(log_file, "%3u,", p->size);
/* writing modulation */
switch(p->modulation) {
case MOD_LORA: fputs("\"LORA\",", log_file); break;
case MOD_FSK: fputs("\"FSK\" ,", log_file); break;
default: fputs("\"ERR\" ,", log_file);
}
/* writing bandwidth */
switch(p->bandwidth) {
case BW_500KHZ: fputs("500000,", log_file); break;
case BW_250KHZ: fputs("250000,", log_file); break;
case BW_125KHZ: fputs("125000,", log_file); break;
case BW_62K5HZ: fputs("62500 ,", log_file); break;
case BW_31K2HZ: fputs("31200 ,", log_file); break;
case BW_15K6HZ: fputs("15600 ,", log_file); break;
case BW_7K8HZ: fputs("7800 ,", log_file); break;
case BW_UNDEFINED: fputs("0 ,", log_file); break;
default: fputs("-1 ,", log_file);
}
/* writing datarate */
if (p->modulation == MOD_LORA) {
switch (p->datarate) {
case DR_LORA_SF7: fputs("\"SF7\" ,", log_file); break;
case DR_LORA_SF8: fputs("\"SF8\" ,", log_file); break;
case DR_LORA_SF9: fputs("\"SF9\" ,", log_file); break;
case DR_LORA_SF10: fputs("\"SF10\" ,", log_file); break;
case DR_LORA_SF11: fputs("\"SF11\" ,", log_file); break;
case DR_LORA_SF12: fputs("\"SF12\" ,", log_file); break;
default: fputs("\"ERR\" ,", log_file);
}
} else if (p->modulation == MOD_FSK) {
fprintf(log_file, "\"%6u\",", p->datarate);
} else {
fputs("\"ERR\" ,", log_file);
}
/* writing coderate */
switch (p->coderate) {
case CR_LORA_4_5: fputs("\"4/5\",", log_file); break;
case CR_LORA_4_6: fputs("\"2/3\",", log_file); break;
case CR_LORA_4_7: fputs("\"4/7\",", log_file); break;
case CR_LORA_4_8: fputs("\"1/2\",", log_file); break;
case CR_UNDEFINED: fputs("\"\" ,", log_file); break;
default: fputs("\"ERR\",", log_file);
}
/* writing packet RSSI */
fprintf(log_file, "%+.0f,", p->rssi);
/* writing packet average SNR */
fprintf(log_file, "%+5.1f,", p->snr);
/* writing hex-encoded payload (bundled in 32-bit words) */
fputs("\"", log_file);
for (j = 0; j < p->size; ++j) {
if ((j > 0) && (j%4 == 0)) fputs("-", log_file);
fprintf(log_file, "%02X", p->payload[j]);
}
/* end of log file line */
fputs("\"\n", log_file);
fflush(log_file);
++pkt_in_log;
}
/* check time and rotate log file if necessary */
++time_check;
if (time_check >= 8) {
time_check = 0;
time(&now_time);
if (difftime(now_time, log_start_time) > log_rotate_interval) {
fclose(log_file);
MSG("INFO: log file %s closed, %lu packet(s) recorded\n", log_file_name, pkt_in_log);
pkt_in_log = 0;
open_log();
}
}
}
if (exit_sig == 1) {
/* clean up before leaving */
i = lgw_stop();
if (i == LGW_HAL_SUCCESS) {
MSG("INFO: concentrator stopped successfully\n");
} else {
MSG("WARNING: failed to stop concentrator successfully\n");
}
fclose(log_file);
MSG("INFO: log file %s closed, %lu packet(s) recorded\n", log_file_name, pkt_in_log);
}
MSG("INFO: Exiting packet logger program\n");
return EXIT_SUCCESS;
}
