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; }