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gpsctl.c
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gpsctl.c
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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
*
* G P S C T L
* (GPS control)
*
* A utility for querying, configuring, and using a U-Blox GPS on Linux.
*
* This program was tested ONLY on a Raspberry Pi 3B, running Jessie, with a Uputronics board that uses a
* U-Blox M8 GPS module.
*
* Created: October 18, 2017
* Author: Tom Dilatush <[email protected]>
* Github:
* License: MIT
*
* Copyright 2017 Tom Dilatush
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
* documentation files (the "Software"), to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and
* to permit persons to whom the Software is furnished to do so.
*
* The above copyright notice and this permission notice shall be included in all copies or substantial portions of
* the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO
* THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE A
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
// TODO: make sure we free any allocated slBuffers!
// TODO: add needed printfs for verbose mode...
// TODO: troll all headers, inserting parameter names and return value comments
// these defines allow compiling on both an OS X development machine and the target Raspberry Pi. If different
// development environments or target machines are needed, these will likely need to be tweaked.
#define _XOPEN_SOURCE 700
#define _DARWIN_C_SOURCE
#define _POSIX_C_SOURCE 199309L
#define _GNU_SOURCE
#include <stdlib.h>
#include <stdbool.h>
#include <stdio.h>
#include <getopt.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
// #include <wiringPi.h>
#include <math.h>
#include "sl_return.h"
#include "sl_options.h"
#include "sl_general.h"
#include "sl_serial.h"
#include "ublox.h"
#include "cJSON.h"
typedef enum { fixQuery, versionQuery, configQuery, satelliteQuery } queryType;
typedef enum { syncNone, syncASCII, syncNMEA, syncUBX } syncType;
typedef struct { char* name; syncType type; } syncTypeRec;
static syncTypeRec syncTypeRecs[] = {
{ "ascii", syncASCII },
{ "nmea", syncNMEA },
{ "ubx", syncUBX }
};
struct clientData_slOptions {
int verbosity;
syncType syncMethod;
const char *port;
int baud;
int minBaud;
int newbaud;
bool report;
bool echo;
int nmea;
bool json;
int echoSeconds;
queryType queryType;
bool error;
int fdPort;
bool ubxSynchronized;
};
dictionary *gpsctlConf;
// Set the sync method to that specified in the argument. Returns Ok if there's no argument (and do nothing) or the
// argument was recognized; or an Error if there was an unrecognizable argument.
static slReturn setSyncMethod(const char* arg, clientData_slOptions* clientData) {
// if no argument was supplied, don't do anything at all...
if (arg == NULL) return makeOkReturn();
// otherwise, try to match the argument...
for (int i = 0; i < ARRAY_SIZE(syncTypeRecs); i++) {
if (0 == strncmp(arg, syncTypeRecs[i].name, strlen(arg))) {
clientData->syncMethod = syncTypeRecs[i].type;
return makeOkReturn();
}
}
// if we get here, we couldn't find the method, so do nothing but return a problem...
return makeErrorFmtMsgReturn(ERR_ROOT, "\"%s\" is not a recognized synchronization method", arg);
}
// NMEA baud rate synchronizer. This looks for a complete, valid NMEA sentence and then declares victory.
// Returns Ok with true if synchronized, false if timed out.
static slReturn nmeaBaudRateSynchronizer(int fdPort, int maxTimeMs, int verbosity) {
bool inLine = false;
char last[3];
int cksm = 0;
long long start = currentTimeMs();
// flush any junk we might have in the receiver buffer...
slReturn frResp = flushRx(fdPort);
if (isErrorReturn(frResp))
makeErrorMsgReturn(ERR_CAUSE(frResp), "could not flush receiver prior to synchronization");
// read characters until either we appear to be synchronized or we run out of time...
while (currentTimeMs() < start + maxTimeMs) {
slReturn rscResp = readSerialChar(fdPort, start + maxTimeMs - currentTimeMs());
if (isErrorReturn(rscResp))
return makeErrorMsgReturn(ERR_CAUSE(rscResp), "problem reading a character while synchronizing");
if (isWarningReturn(rscResp))
return makeOkInfoReturn(bool2info(false));
char c = getReturnInfoChar(rscResp);
if (inLine) {
if ((c == '\r') || (c == '\n')) {
if (last[0] == '*') {
int un = hex2int(last[1]);
if (un >= 0) {
int ln = hex2int(last[2]);
if (ln >= 0) {
int ck = (un << 4) | ln;
// correct checksum for the last three characters received...
cksm ^= last[0];
cksm ^= last[1];
cksm ^= last[2];
if (ck == cksm) {
return makeOkInfoReturn(bool2info(true));
}
}
}
}
inLine = false;
}
else {
cksm ^= c;
last[0] = last[1];
last[1] = last[2];
last[2] = c;
}
}
else if (c == '$') {
inLine = true;
cksm = 0;
}
}
return makeOkInfoReturn(bool2info(false));
}
// Attempt to synchronize, using the given method at the current host baud rate. On an Ok response, returns true
// or false for synchronization success as a bool in additional info.
static slReturn syncSerial(const syncType type, clientData_slOptions* clientData) {
// we're going to allow 250 character times, or 1.5 seconds, whichever is greater...
speedInfo si;
slReturn gsiResp = getSpeedInfo(clientData->fdPort, &si);
if (isErrorReturn(gsiResp))
return makeErrorMsgReturn(ERR_CAUSE(gsiResp), "problem getting speed information");
int maxMs = (int) max_ll(1500, si.nsChar * 250 / 1000000);
switch (type) {
case syncNMEA: return nmeaBaudRateSynchronizer(clientData->fdPort, maxMs, clientData->verbosity);
case syncASCII: return asciiBaudRateSynchronizer(clientData->fdPort, maxMs, clientData->verbosity);
case syncUBX:
if (clientData->ubxSynchronized) return makeOkInfoReturn(bool2info(true));
slReturn ubsxResp = ubxSynchronizer(clientData->fdPort, maxMs, clientData->verbosity);
if (isErrorReturn(ubsxResp)) return ubsxResp;
if (getReturnInfoBool(ubsxResp)) clientData->ubxSynchronized = true;
return ubsxResp;
default: return makeErrorFmtMsgReturn(ERR_ROOT, "unknown synchronization type: %d", type);
}
}
// Outputs a fix query, in English or JSON.
static slReturn doFixQuery(const clientData_slOptions* clientData) {
ubxFix fix = {0}; // zeroes all elements...
slReturn result = ubxGetFix(clientData->fdPort, clientData->verbosity, &fix);
double msl_height_feet = 0.00328084 * fix.height_above_sea_level_mm;
double height_accuracy_feet = 0.00328084 * fix.height_accuracy_mm;
double horizontal_accuracy_feet = 0.00328084 * fix.horizontal_accuracy_mm;
double speed_mph = fix.ground_speed_mm_s * 0.00223694;
double speed_accuracy_mph = fix.ground_speed_accuracy_mm_s * 0.00223694;
if (isErrorReturn(result))
return makeErrorMsgReturn(ERR_CAUSE(result), "Problem obtaining fix from GPS");
if (clientData->json) {
cJSON* root = cJSON_CreateObject();
cJSON* objFix = cJSON_CreateObject();
cJSON* time = cJSON_CreateObject();
cJSON_AddItemToObject(root, "fix", objFix);
cJSON_AddNumberToObject(objFix, "latitude_deg", fix.latitude_deg);
cJSON_AddNumberToObject(objFix, "longitude_deg", fix.longitude_deg);
cJSON_AddNumberToObject(objFix, "height_above_ellipsoid_mm", fix.height_above_ellipsoid_mm);
cJSON_AddNumberToObject(objFix, "height_above_mean_sea_level_mm", fix.height_above_sea_level_mm);
cJSON_AddNumberToObject(objFix, "horizontal_accuracy_mm", fix.horizontal_accuracy_mm);
cJSON_AddNumberToObject(objFix, "height_accuracy_mm", fix.height_accuracy_mm);
cJSON_AddNumberToObject(objFix, "ground_speed_mm_sec", fix.ground_speed_mm_s);
cJSON_AddNumberToObject(objFix, "ground_speed_accuracy_mm_sec", fix.ground_speed_accuracy_mm_s);
cJSON_AddNumberToObject(objFix, "heading_deg", fix.heading_deg);
cJSON_AddNumberToObject(objFix, "heading_accuracy_deg", fix.heading_accuracy_deg);
cJSON_AddBoolToObject(objFix, "valid", fix.fix_valid);
cJSON_AddBoolToObject(objFix, "3d", fix.fix_is_3d);
cJSON_AddNumberToObject(root, "number_of_satellites_used", fix.number_of_satellites_used);
cJSON_AddItemToObject(root, "time", time);
cJSON_AddNumberToObject(time, "year", fix.year);
cJSON_AddNumberToObject(time, "month", fix.month);
cJSON_AddNumberToObject(time, "day", fix.day);
cJSON_AddNumberToObject(time, "hour", fix.hour);
cJSON_AddNumberToObject(time, "minute", fix.minute);
cJSON_AddNumberToObject(time, "second", fix.second);
cJSON_AddNumberToObject(time, "accuracy_ns", fix.time_accuracy_ns);
cJSON_AddBoolToObject(time, "valid", fix.time_valid);
cJSON_AddBoolToObject(time, "resolved", fix.time_resolved);
char *jsonStr = cJSON_PrintUnformatted(root);
printf("%s\n", jsonStr);
cJSON_Delete(root);
}
else {
if (fix.time_resolved && fix.time_valid && fix.date_valid)
printf(" Time (UTC): %04d-%02d-%02d %02d:%02d:%02.0f (yyyy-mm-dd hh:mm:ss)\n",
fix.year, fix.month, fix.day, fix.hour, fix.minute, fix.second);
else
printf(" Time (UTC): not resolved or not valid\n");
if (fix.fix_valid) {
printf(" Latitude: %12.8f %c\n", fabs(fix.latitude_deg), (fix.latitude_deg < 0) ? 'S' : 'N');
printf(" Longitude: %12.8f %c\n", fabs(fix.longitude_deg), (fix.longitude_deg < 0) ? 'W' : 'E');
if (fix.fix_is_3d)
printf(" Altitude: %.3f feet\n", msl_height_feet);
else
printf(" Altitude: unknown\n");
printf(" Motion: %.3f mph at %.3f degrees heading\n", speed_mph, fix.heading_deg);
}
else
printf(" Fix: invalid\n");
printf(" Satellites: %d used for computing this fix\n", fix.number_of_satellites_used);
printf(" Accuracy: time (%d ns), height (+/-%.3f feet), position (+/-%.3f feet), heading(+/-%.3f degrees), speed(+/-%.3f mph)\n",
fix.time_accuracy_ns, height_accuracy_feet, horizontal_accuracy_feet, fix.heading_accuracy_deg, speed_accuracy_mph);
}
return makeOkReturn();
}
// Outputs a version query, in English or JSON.
static slReturn doVersionQuery(const clientData_slOptions* clientData) {
ubxVersion version = {0}; // zeroes all elements...
slReturn result = ubxGetVersion(clientData->fdPort, clientData->verbosity, &version);
if (isErrorReturn(result))
return makeErrorMsgReturn(ERR_CAUSE(result), "Problem obtaining version information from GPS");
if (clientData->json) {
cJSON *root = cJSON_CreateObject();
cJSON_AddItemToObject(root, "software_version", cJSON_CreateString(version.software));
cJSON_AddItemToObject(root, "hardware_version", cJSON_CreateString(version.hardware));
cJSON_AddItemToObject(root, "extensions",
cJSON_CreateStringArray((const char**) version.extensions, version.number_of_extensions));
char *jsonStr = cJSON_PrintUnformatted(root);
printf("%s\n", jsonStr);
cJSON_Delete(root);
}
else {
printf("Software version: %s\n", version.software);
free(version.software);
printf("Hardware version: %s\n", version.hardware);
free(version.hardware);
char **ptr = version.extensions;
while ((*ptr) != NULL) {
printf(" Extension: %s\n", *ptr);
free((*ptr));
ptr++;
}
}
return makeOkReturn();
}
// comparison function for satellite search...
int cmpSatellite(const void* a, const void* b) {
ubxSatellite* c = (ubxSatellite*) a;
ubxSatellite* d = (ubxSatellite*) b;
if (c->used && !d->used) return -1;
if (d->used && !c->used) return 1;
return d->cno - c->cno;
}
// Outputs a satellite query, in English or JSON.
static slReturn doSatelliteQuery(const clientData_slOptions* clientData) {
// get the satellite data from the GPS...
ubxSatellites satellites = {0}; // zeroes all elements...
slReturn ugsResp = ubxGetSatellites(clientData->fdPort, clientData->verbosity, &satellites);
if (isErrorReturn(ugsResp))
return makeErrorMsgReturn(ERR_CAUSE(ugsResp), "Problem obtaining satellites information from GPS");
// sort the result by used or not, then in descending order of CNo...
qsort(satellites.satellites, (unsigned) satellites.numberOfSatellites, sizeof(ubxSatellite), cmpSatellite);
if (clientData->json) {
cJSON* root = cJSON_CreateObject();
cJSON* sats = cJSON_CreateArray();
cJSON_AddNumberToObject(root, "number_of_satellites", satellites.numberOfSatellites);
cJSON_AddItemToObject(root, "satellites", sats);
for (int i = 0; i < satellites.numberOfSatellites; i++) {
ubxSatellite* s = satellites.satellites + i;
cJSON* sat = cJSON_CreateObject();
cJSON_AddItemToArray(sats, sat);
cJSON_AddStringToObject(sat, "gnssID", getGnssName(s->gnssID));
cJSON_AddNumberToObject(sat, "satelliteID", s->satelliteID);
cJSON_AddNumberToObject(sat, "CNo", s->cno);
cJSON_AddNumberToObject(sat, "elevation", s->elevation);
cJSON_AddNumberToObject(sat, "azimuth", s->azimuth);
cJSON_AddNumberToObject(sat, "pseudoRangeResidual_meters", s->pseudoRangeResidualM);
cJSON_AddStringToObject(sat, "signalQuality", getSignalQuality(s->signalQuality));
cJSON_AddBoolToObject(sat, "used", s->used);
cJSON_AddStringToObject(sat, "satelliteHealth", getSatelliteHealth(s->health));
cJSON_AddBoolToObject(sat, "diffCorr", s->diffCorr);
cJSON_AddBoolToObject(sat, "smoothed", s->smoothed);
cJSON_AddStringToObject(sat, "orbitSource", getOrbitSource(s->orbitSource));
cJSON_AddBoolToObject(sat, "haveEphemeris", s->haveEphemeris);
cJSON_AddBoolToObject(sat, "haveAlmanac", s->haveAlmanac);
cJSON_AddBoolToObject(sat, "haveAssistNowOff", s->haveAssistNowOff);
cJSON_AddBoolToObject(sat, "haveAssistNowAuto", s->haveAssistNowAuto);
cJSON_AddBoolToObject(sat, "sbasCorrUsed", s->sbasCorrUsed);
cJSON_AddBoolToObject(sat, "rtcmCorrUsed", s->rtcmCorrUsed);
cJSON_AddBoolToObject(sat, "prCorrUsed", s->prCorrUsed);
cJSON_AddBoolToObject(sat, "crCorrUsed", s->crCorrUsed);
cJSON_AddBoolToObject(sat, "doCorrUsed", s->doCorrUsed);
}
char *jsonStr = cJSON_PrintUnformatted(root);
printf("%s\n", jsonStr);
cJSON_Delete(root);
}
else {
// print out our column headers...
printf("\n%-8s%3s %3s %3s %3s %5s %-20s%-8s%-15sFlags\n", "GNSS", "ID", "CNo", "El", "Azi", "PRr", "Signal qual", "Sat Hlt", "Orbit Src");
printf("%-8s%3s %3s %3s %3s %5s %-20s%-8s%-15s=====\n", "=======", "===", "===", "===", "===", "=====", "===================", "=======", "==============");
// now print out all our satellites...
for (int i = 0; i < satellites.numberOfSatellites; i++) {
// build up our flags string...
ubxSatellite* s = satellites.satellites + i;
char* flags = NULL;
if (s->used) append(&flags, "u");
if (s->diffCorr) append(&flags, "d");
if (s->smoothed) append(&flags, "s");
if (s->haveEphemeris) append(&flags, "e");
if (s->haveAlmanac) append(&flags, "a");
if (s->sbasCorrUsed) append(&flags, "S");
if (s->rtcmCorrUsed) append(&flags, "R");
if (s->prCorrUsed) append(&flags, "P");
if (s->crCorrUsed) append(&flags, "C");
if (s->doCorrUsed) append(&flags, "D");
if (flags == NULL) append(&flags, "");
// print our satellite line...
printf("%-8s%3d %3d %3d %3d %5.1f %-20s%-8s%-15s%s\n",
getGnssName(s->gnssID), s->satelliteID, s->cno, s->elevation, s->azimuth, s->pseudoRangeResidualM,
getSignalQuality(s->signalQuality), getSatelliteHealth(s->health), getOrbitSource(s->orbitSource), flags);
free(flags);
}
printf("\nFlags:\n"
" u - used for navigation fix\n"
" d - differential correction is available\n"
" s - carrier-smoothed pseudorange used\n"
" e - ephemeris is available\n"
" a - almanac is available\n"
" S - SBAS corrections used\n"
" R - RTCM corrections used\n"
" P - pseudorange corrections used\n"
" C - carrier range corrections used\n"
" D - range rate (Doppler) corrections used\n"
);
}
// free up the memory we allocated...
free(satellites.satellites);
return makeOkReturn();
}
// Outputs a configuration query, in English or JSON.
static slReturn doConfigQuery(const clientData_slOptions* clientData) {
ubxConfig config = {}; // zeroes all elements...
slReturn result = ubxGetConfig(clientData->fdPort, clientData->verbosity, &config);
if (isErrorReturn(result))
return makeErrorMsgReturn(ERR_CAUSE(result), "Problem obtaining configuration information from GPS");
if (clientData->json) {
cJSON* root = cJSON_CreateObject();
cJSON* ant = cJSON_CreateObject();
cJSON* gnss = cJSON_CreateObject();
cJSON* gnssRecs = cJSON_CreateArray();
cJSON* nav = cJSON_CreateObject();
cJSON* time = cJSON_CreateObject();
cJSON* rate = cJSON_CreateObject();
cJSON* pwr = cJSON_CreateObject();
cJSON* nmea = cJSON_CreateObject();
cJSON_AddItemToObject(root, "antenna", ant);
cJSON_AddItemToObject(root, "GNSS", gnss);
cJSON_AddItemToObject(gnss, "GNSS_records", gnssRecs);
cJSON_AddItemToObject(root, "navigation", nav);
cJSON_AddItemToObject(root, "time_pulse", time);
cJSON_AddItemToObject(root, "fix_rate", rate);
cJSON_AddItemToObject(root, "power_mode", pwr);
cJSON_AddItemToObject(root, "nmea", nmea);
cJSON_AddBoolToObject(ant, "power_on", config.antPwr);
cJSON_AddBoolToObject(ant, "short_detection", config.antShrtDet);
cJSON_AddBoolToObject(ant, "open_detection", config.antOpenDet);
cJSON_AddBoolToObject(ant, "power_down_on_short", config.antPwrDwnOnShrt);
cJSON_AddBoolToObject(ant, "auto_recover_from_short", config.antAutoRec);
cJSON_AddNumberToObject(gnss, "number_of_tracking_channels", config.trkChnnls);
for (int i = 0; i < config.gnssRecs; i++) {
cJSON* gnssRec = cJSON_CreateObject();
cJSON_AddStringToObject(gnssRec, "name", getGnssName(config.gnss[i].id));
cJSON_AddBoolToObject(gnssRec, "enabled", config.gnss[i].enabled);
cJSON_AddNumberToObject(gnssRec, "min_channels", config.gnss[i].minChnnls);
cJSON_AddNumberToObject(gnssRec, "max_channels", config.gnss[i].maxChnnls);
cJSON_AddItemToArray(gnssRecs, gnssRec);
}
cJSON_AddStringToObject(nav, "dynamic_model", getDynamicModelName(config.model));
cJSON_AddStringToObject(nav, "fix_mode", getFixModeName(config.mode));
cJSON_AddNumberToObject(nav, "fixed_altitude_2D_meters", config.fixedAltM);
cJSON_AddNumberToObject(nav, "fixed_altitude_2D_variance_m2", config.fixedAltVarM2);
cJSON_AddNumberToObject(nav, "min_elevation", config.minElevDeg);
cJSON_AddNumberToObject(nav, "position_dop_mask", config.pDoP);
cJSON_AddNumberToObject(nav, "time_dop_mask", config.tDoP);
cJSON_AddNumberToObject(nav, "position_accuracy_mask", config.pAccM);
cJSON_AddNumberToObject(nav, "time_accuracy_mask", config.tAccM);
cJSON_AddNumberToObject(nav, "static_hold_threshold_cms", config.staticHoldThreshCmS);
cJSON_AddNumberToObject(nav, "dgnss_timeout_secs", config.dgnssTimeoutS);
cJSON_AddNumberToObject(nav, "threshold_satellites_above_cno", config.cnoThreshNumSVs);
cJSON_AddNumberToObject(nav, "cno_threshold_dbhz", config.cnoThreshDbHz);
cJSON_AddNumberToObject(nav, "static_hold_max_distance_meters", config.staticHoldMaxDistM);
cJSON_AddStringToObject(nav, "utc_standard", getUTCTypeName(config.utcStandard));
cJSON_AddBoolToObject(time, "enabled", config.timePulse0Enabled);
cJSON_AddBoolToObject(time, "is_freq", config.isFreq);
cJSON_AddBoolToObject(time, "is_length", config.isLength);
cJSON_AddBoolToObject(time, "lock_on_gps_freq", config.lockGpsFreq);
cJSON_AddBoolToObject(time, "locked_other_set", config.lockedOtherSet);
cJSON_AddBoolToObject(time, "align_to_top_of_second", config.alignToTow);
cJSON_AddBoolToObject(time, "polarity_rising_edge", config.polarity);
cJSON_AddStringToObject(time, "time_grid", getTimeGridTypeName(config.gridUtcTnss));
cJSON_AddNumberToObject(time, "antenna_cable_delay_ns", config.antCableDelayNs);
cJSON_AddNumberToObject(time, "rf_group_delay_ns", config.rfGroupDelayNs);
cJSON_AddNumberToObject(time, "user_configured_delay_ns", config.userConfigDelay);
cJSON_AddNumberToObject(time, "freq_period_lock", config.freqPeriodLock * (config.isFreq ? 1 : 0.000001));
cJSON_AddNumberToObject(time, "freq_period", config.freqPeriod * (config.isFreq ? 1 : 0.000001));
cJSON_AddNumberToObject(time, "pulse_length_ratio_lock", config.pulseLenRatioLock * (config.isLength ? 0.000001 : 0.000000023283064));
cJSON_AddNumberToObject(time, "pulse_length_ratio", config.pulseLenRatio * (config.isLength ? 0.000001 : 0.000000023283064));
cJSON_AddNumberToObject(rate, "measurement_rate_ms", config.measRateMs);
cJSON_AddNumberToObject(rate, "measurements_per_fix", config.navRate);
cJSON_AddStringToObject(rate, "time_reference", getFixTimeRefName(config.timeRef));
cJSON_AddStringToObject(pwr, "power_setup", getPowerModeName(config.powerSetup));
cJSON_AddNumberToObject(pwr, "period_secs_for_interval", config.powerIntervalSecs);
cJSON_AddNumberToObject(pwr, "on_time_secs_for_interval", config.powerOnTimeSecs);
cJSON_AddBoolToObject(nmea, "enabled", config.nmeaEnabled);
cJSON_AddNumberToObject(nmea, "version", (config.nmeaVersion / 16) + (config.nmeaVersion % 16) * 0.1);
cJSON_AddBoolToObject(nmea, "GGA", config.GGA);
cJSON_AddBoolToObject(nmea, "GLL", config.GLL);
cJSON_AddBoolToObject(nmea, "GSA", config.GSA);
cJSON_AddBoolToObject(nmea, "GSV", config.GSV);
cJSON_AddBoolToObject(nmea, "RMC", config.RMC);
cJSON_AddBoolToObject(nmea, "VTG", config.VTG);
cJSON_AddBoolToObject(nmea, "GRS", config.GRS);
cJSON_AddBoolToObject(nmea, "GST", config.GST);
cJSON_AddBoolToObject(nmea, "ZDA", config.ZDA);
char *jsonStr = cJSON_PrintUnformatted(root);
printf("%s\n", jsonStr);
cJSON_Delete(root);
}
else {
printf("U-Blox GPS configuration\n");
printf(" Antenna:\n");
printf(" Power enabled: %s\n", yesNo(config.antPwr));
printf(" Short detection: %s\n", yesNo(config.antShrtDet));
printf(" Open detection: %s\n", yesNo(config.antOpenDet));
printf(" Power down on short: %s\n", yesNo(config.antPwrDwnOnShrt));
printf(" Auto recovery from short: %s\n", yesNo(config.antAutoRec));
printf(" GNSS:\n");
printf(" Tracking channels: %d\n", config.trkChnnls);
for (int i = 0; i < config.gnssRecs; i++) {
printf(" Type: %s\n", getGnssName(config.gnss[i].id));
printf(" Enabled: %s\n", yesNo(config.gnss[i].enabled));
printf(" Minimum channels: %d\n", config.gnss[i].minChnnls);
printf(" Maximum channels: %d\n", config.gnss[i].maxChnnls);
}
printf(" Navigation engine:\n");
printf(" Dynamic model: %s\n", getDynamicModelName(config.model));
printf(" Fix mode: %s\n", getFixModeName(config.mode));
printf(" Fixed altitude (2D): %.2f meters\n", config.fixedAltM);
printf(" Fixed altitude variance (2D): %.4f meters^2\n", config.fixedAltVarM2);
printf(" Minimum elevation: %d degrees\n", config.minElevDeg);
printf(" Position DoP mask: %.1f\n", config.pDoP);
printf(" Time DoP mask: %.1f\n", config.tDoP);
printf(" Position accuracy mask: %d meters\n", config.pAccM);
printf(" Time accuracy mask: %d meters\n", config.tAccM);
printf(" Static hold threshold: %d cm/s\n", config.staticHoldThreshCmS);
printf(" Dynamic GNSS timeout: %d seconds\n", config.dgnssTimeoutS);
printf(" Threshold above C/No: %d satellites\n", config.cnoThreshNumSVs);
printf(" C/No threshold: %d dBHz\n", config.cnoThreshDbHz);
printf(" Static hold max distance: %d meters\n", config.staticHoldMaxDistM);
printf(" UTC standard: %s\n", getUTCTypeName(config.utcStandard));
printf(" Time pulse:\n");
printf(" Time pulse 0 enabled: %s\n", yesNo(config.timePulse0Enabled));
printf(" Use frequency vs. period: %s\n", yesNo(config.isFreq));
printf(" Use length vs. duty cycle: %s\n", yesNo(config.isLength));
printf(" Lock on GPS frequency: %s\n", yesNo(config.lockGpsFreq));
printf(" Lock use other set: %s\n", yesNo(config.lockedOtherSet));
printf(" Align to top of second: %s\n", yesNo(config.alignToTow));
printf(" Polarity rising edge: %s\n", yesNo(config.polarity));
printf(" Time grid: %s\n", getTimeGridTypeName(config.gridUtcTnss));
printf(" Antenna cable delay: %d nanoseconds\n", config.antCableDelayNs);
printf(" RF group delay: %d nanoseconds\n", config.rfGroupDelayNs);
if (config.isFreq) {
printf(" Locked pulse frequency: %d Hz\n", config.freqPeriodLock);
printf(" Unlocked pulse frequency: %d Hz\n", config.freqPeriod);
} else {
printf(" Locked pulse period: %d microseconds\n", config.freqPeriodLock);
printf(" Unlocked pulse period: %d microseconds\n", config.freqPeriod);
}
if (config.isLength) {
printf(" Locked pulse length: %d microseconds\n", config.pulseLenRatioLock);
printf(" Unlocked pulse length: %d microseconds\n", config.pulseLenRatio);
} else {
printf(" Locked pulse duty cycle: %.2f%%\n", config.pulseLenRatioLock * 0.000000023283064);
printf(" Unlocked pulse duty cycle: %.2f%%\n", config.pulseLenRatio * 0.000000023283064);
}
printf(" User configurable delay: %d nanoseconds\n", config.userConfigDelay);
printf(" Fix rate:\n");
printf(" Measurement rate: %d milliseconds\n", config.measRateMs);
printf(" Measurements per fix: %d\n", config.navRate);
printf(" Time reference: %s\n", getFixTimeRefName(config.timeRef));
printf(" Power mode:\n");
printf(" Power setup: %s\n", getPowerModeName(config.powerSetup));
printf(" Period (if interval): %d seconds\n", config.powerIntervalSecs);
printf(" On time (if interval): %d seconds\n", config.powerOnTimeSecs);
printf(" NMEA:\n");
printf(" Enabled: %s\n", yesNo(config.nmeaEnabled));
printf(" Version: %01x.%01x\n", config.nmeaVersion / 16, config.nmeaVersion % 16);
printf(" GGA: %s\n", onOff(config.GGA));
printf(" GLL: %s\n", onOff(config.GLL));
printf(" GSA: %s\n", onOff(config.GSA));
printf(" GSV: %s\n", onOff(config.GSV));
printf(" RMC: %s\n", onOff(config.RMC));
printf(" VTG: %s\n", onOff(config.VTG));
printf(" GRS: %s\n", onOff(config.GRS));
printf(" GST: %s\n", onOff(config.GST));
printf(" ZDA: %s\n", onOff(config.ZDA));
}
return makeOkReturn();
}
static slReturn parseMsgHelper(errorInfo_slReturn error, const optionDef_slOptions* def, char *pattern, ...) {
char* resolved;
// first resolve the pattern we were given...
va_list args;
va_start(args, pattern);
vasprintf(&resolved, pattern, args);
va_end(args);
// return our bad news...
slReturn result = makeErrorFmtMsgReturn(error, "option parsing problem: [%s] %s", getName_slOptions(def), resolved);
free(resolved);
return result;
}
// Test the argument to see if it represents a valid serial port. On failure, return an error.
static slReturn parsePort(void* ptrArg, int intArg, const optionDef_slOptions *def, const char *arg, clientData_slOptions *clientData) {
slReturn vsd = verifySerialDevice(arg);
clientData->port = arg;
if (isErrorReturn(vsd))
return makeErrorFmtMsgReturn(ERR_CAUSE(vsd), "device \"%s\" is not a terminal", arg);
// stuff it away to the given pointer...
return makeOkReturn();
}
// Parse the given argument, which is presumed to be a string representing a positive integer that is one of the
// standard baud rates. If the parsing fails for any reason, return an error
static slReturn parseBaud(void* ptrArg, int intArg, const optionDef_slOptions* def, const char* arg, clientData_slOptions* clientData) {
// make sure we can parse the entire argument into an integer...
char *endPtr;
int baud = (int) strtol(arg, &endPtr, 10);
if (*endPtr != 0)
return parseMsgHelper(ERR_ROOT, def, "the specified baud rate (\"%s\") is not an integer", arg);
// make sure the result is a valid baud rate...
if (getBaudRateCookie(baud) < 0)
return parseMsgHelper(ERR_ROOT, def, "the specified baud rate (\"%s\") is not a valid one (4800, 9600, 19200, etc.)", arg);
// we have a valid baud rate, so stuff it away and return in victory...
*((int*)ptrArg) = baud;
return makeOkReturn();
}
// Parse autobaud or sync, which have an optional argument of ascii, nmea, or ubx.
static slReturn parseSyncMethod(void* ptrArg, int intArg, const optionDef_slOptions* def, const char* arg, clientData_slOptions* clientData) {
// set up the sync method...
slReturn ssmResp = setSyncMethod(arg, clientData);
if (isErrorReturn(ssmResp))
return parseMsgHelper(ERR_CAUSE(ssmResp), def, "the specified baud rate inference method (\"%s\") is unrecognizable; should be \"ascii\", \"nmea\", or \"ubx\"", arg);
return makeOkReturn();
}
// Parse the given argument, which is presumed to be a string representing a yes or no value, which if parsed without
// error is stored to the argPtr. If the parsing fails for any reason, return an error.
static slReturn parseBool(void* ptrArg, int intArg, const optionDef_slOptions* def, const char* arg, clientData_slOptions* clientData) {
// see if we've got anything that like a yes or true (otherwise, we make it a false)...
*((int*)ptrArg) = 0;
if (arg) {
*((int*)ptrArg) = (strchr("yYtT1", *arg) != NULL ? 1 : 0);
// now look for "on" and treat it as true
if (strlen(arg) > 1) {
if ((tolower(arg[0]) == 'o') && (tolower(arg[1]) == 'n')) {
*((int*)ptrArg) = 1;
}
}
}
// then return with no error...
return makeOkReturn();
}
// Parse the given argument, which is presumed to be a string representing an integer, which if parsed without error is
// stored to the argPtr. If the parsing fails for any reason, return an error.
static slReturn parseInt(void* ptrArg, int intArg, const optionDef_slOptions* def, const char* arg, clientData_slOptions* clientData) {
// make sure we can parse the entire argument into an integer...
int n = 0;
if (arg != NULL) {
char *endPtr;
n = (int) strtol(arg, &endPtr, 10);
if (*endPtr != 0)
return parseMsgHelper(ERR_ROOT, def, "the specified %s (\"%s\") is not an integer", def->argName, arg);
}
// stuff it away to the given pointer...
*((int*)ptrArg) = n;
// then return with no error...
return makeOkReturn();
}
// Set a boolean flag at the given ptrArg to the given intArg.
static slReturn parseFlag(void* ptrArg, int intArg, const optionDef_slOptions* def, const char* arg, clientData_slOptions* clientData) {
// do what we've been told to do...
*((bool*)ptrArg) = (bool) intArg;
// then return with no error...
return makeOkReturn();
}
typedef struct { char* name; queryType queryType; } queryDef;
static queryDef queryDefs[] = {
{ "fix", fixQuery },
{ "version", versionQuery },
{ "satellites", satelliteQuery },
{ "config", configQuery }
};
// Parse the given query type and store the results. Returns an error on any parsing problem.
static slReturn parseQuery(void* ptrArg, int intArg, const optionDef_slOptions* def, const char* arg, clientData_slOptions* clientData) {
// see what kind of query we've got here...
for (int i = 0; i < ARRAY_SIZE(queryDefs); i++) {
if (0 == strcmp(arg, queryDefs[i].name)) {
clientData->queryType = queryDefs[i].queryType;
return makeOkReturn();
}
}
// if we get here then we have a bogus query type...
return parseMsgHelper(ERR_ROOT, def, "the specified %s (\"%s\") is not a valid query type", def->argName, arg);
}
// Increment the int counter at the given ptrArg.
static slReturn parseCount(void* ptrArg, int intArg, const optionDef_slOptions* def, const char* arg, clientData_slOptions* clientData) {
// do what we've been told to do...
(*((int*)ptrArg))++;
// then return with no error...
return makeOkReturn();
}
#undef V3
#undef V2
#undef V1
#undef V0
#undef CD
// Sync may only be specified if auto baud rate was NOT specified...
static slReturn constrainSync(const optionDef_slOptions* defs, const psloConfig* config, const state_slOptions* state) {
if (hasShortOption_slOptions('a', state))
return makeErrorMsgReturn(ERR_ROOT, "-s, --sync may only be specified if -a, --autobaud is NOT specified");
return makeOkReturn();
}
// JSON may only be specified if a query was specified...
static slReturn constrainJSON(const optionDef_slOptions* defs, const psloConfig* config, const state_slOptions* state) {
if (!hasShortOption_slOptions('Q', state))
return makeErrorMsgReturn(ERR_ROOT, "-j, --json may only be specified if -Q, --query is also specified");
return makeOkReturn();
}
// Baud may only be specified if auto baud rate was NOT specified...
static slReturn constrainBaud(const optionDef_slOptions* defs, const psloConfig* config, const state_slOptions* state) {
if (hasShortOption_slOptions('a', state))
return makeErrorMsgReturn(ERR_ROOT, "-b, --baud may only be specified if -a, --autobaud is NOT specified");
return makeOkReturn();
}
// Minbaud may only be specified if auto baud rate was specified...
static slReturn constrainMinBaud(const optionDef_slOptions* defs, const psloConfig* config, const state_slOptions* state) {
if (!hasShortOption_slOptions('a', state))
return makeErrorMsgReturn(ERR_ROOT, "-M, --minbaud may only be specified if -a, --autobaud is also specified");
return makeOkReturn();
}
// Verbosity may only be specified if quiet was NOT specified...
static slReturn constrainVerbosity(const optionDef_slOptions* defs, const psloConfig* config, const state_slOptions* state) {
if (hasShortOption_slOptions('q', state))
return makeErrorMsgReturn(ERR_ROOT, "-v, --verbosity d may only be specified if -q, --quiet is NOT specified");
return makeOkReturn();
}
#define CD (config->clientData)
#define V0 (CD->verbosity >= 0)
#define V1 (CD->verbosity >= 1)
#define V2 (CD->verbosity >= 2)
#define V3 (CD->verbosity >= 3)
/* remove PPS signal test as wiringPi is now deprecates
// Test for the presence and quality of a 1 Hz signal on GPIO 18 (the PPS signal from the GPS), printing the result.
#define PPS_PIN 1
static slReturn actionTestPPS(const optionDef_slOptions* defs, const psloConfig* config) {
wiringPiSetup();
pinMode(PPS_PIN, INPUT);
struct timespec tenmicro = { 0, 10000 };
struct timespec lastTime = { 0, 0 };
// measure for about 10 seconds...
int lastState = 0;
for (int i = 0; i < 100000; i++) {
// wait 10 microseconds
nanosleep(&tenmicro, NULL);
// check our state...
int state = digitalRead(PPS_PIN);
// if the state has changed, time to measure and report...
if (state != lastState) {
// get the current time...
struct timespec thisTime;
int result = clock_gettime(CLOCK_MONOTONIC, &thisTime);
if (result != 0)
return makeErrorFmtMsgReturn(ERR_ROOT, "problem reading CPU clock: %s", strerror(errno));
// if this isn't our first measurement...
if ((lastTime.tv_sec != 0) || (lastTime.tv_nsec != 0)) {
// figure out how long we were in this state...
long long nanos = thisTime.tv_nsec - lastTime.tv_nsec;
if (nanos < 0) nanos += 1000000000;
double secs = 1.0 * nanos / 1000000000.0;
// tell our results...
char* signal = (lastState == 0) ? " low" : "high";
printf("PPS was %s for %.3f seconds\n", signal, secs);
}
lastTime = thisTime;
lastState = state;
}
}
return makeOkReturn();
}
*/
// Autobaud action function, which infers the GPS baud rate by trying to synchronize at various baud rates.
static slReturn actionAutoBaud(const optionDef_slOptions* defs, const psloConfig* config) {
// first we figure out what synchronization type we're going to use...
baudRateSynchronizer* synchronizer;
clientData_slOptions* cd = config->clientData;
switch (cd->syncMethod) {
case syncASCII:
synchronizer = asciiBaudRateSynchronizer;
break;
case syncNMEA:
synchronizer = nmeaBaudRateSynchronizer;
break;
case syncUBX:
synchronizer = ubxSynchronizer;
break;
default: return makeErrorFmtMsgReturn(ERR_ROOT, "invalid synchronization type: %d", cd->syncMethod);
}
if (V2) printf("Automatically determining baud rate...\n");
// now we set the correct options (the first baud rate, 8 data bits, 1 stop bit, no parity)
slReturn result = setTermOptions(CD->fdPort, 460800, 8, 1, false, false);
if (isErrorReturn(result)) {
close(CD->fdPort);
return makeErrorMsgReturn(ERR_CAUSE(result), "Error when setting terminal options");
}
// now we do the actual work...
slReturn abResp = autoBaudRate(cd->fdPort, cd->minBaud, synchronizer, cd->verbosity);
if (isErrorReturn(abResp))
makeErrorFmtMsgReturn(ERR_CAUSE(abResp), "problem while automatically determining baud rate");
// change the client data to reflect the new baud rate...
cd->baud = cd->newbaud;
return makeOkReturn();
}
// Baud action function, which sets the host's port to the specified baud rate.
static slReturn actionBaud(const optionDef_slOptions* defs, const psloConfig* config) {
if (V2) printf("Setting baud rate to %d...\n", CD->baud);
// now we set the correct options (the specified baud rate, 8 data bits, 1 stop bit, no parity)
slReturn result = setTermOptions(CD->fdPort, CD->baud, 8, 1, false, false);
if (isErrorReturn(result)) {
close(CD->fdPort);
return makeErrorMsgReturn(ERR_CAUSE(result), "Error when setting terminal options");
}
return makeOkReturn();
}
// New baud rate action function, which changes both the U-Blox GPS baud rate and the host baud rate.
static slReturn actionNewBaud(const optionDef_slOptions* defs, const psloConfig* config) {
clientData_slOptions* cd = config->clientData;
if (V2) printf("Changing baud rate to %d...\n", cd->newbaud);
slReturn resp = ubxChangeBaudRate(cd->fdPort, (unsigned) cd->newbaud, cd->verbosity);
if (isErrorReturn(resp))
return makeErrorMsgReturn(ERR_CAUSE(resp), "failed to change baud rate");
return makeOkReturn();
}
// Sync action function, which synchronizes serial port receiver with the data stream using the configured method.
static slReturn actionSync(const optionDef_slOptions* defs, const psloConfig* config) {
slReturn ssResp = syncSerial(CD->syncMethod, config->clientData);
if (isErrorReturn(ssResp))
return makeErrorMsgReturn(ERR_CAUSE(ssResp), "error while synchronizing on serial data");
bool success = getReturnInfoChar(ssResp);
if (success)
return makeOkReturn();
else
return makeErrorMsgReturn(ERR_ROOT, "failed to synchronize");
}
// NMEA action function, which turns NMEA data on or off on the U-Blox GPS.
static slReturn actionNMEA(const optionDef_slOptions* defs, const psloConfig* config) {
clientData_slOptions* clientData = config->clientData;
// If nmea flag is not explicitly 0 or 1 return without touching it
// so nmea enabled option 'enabled=statusquo' wouldn't change setting
if (clientData->nmea < 0 || clientData->nmea > 1)
return makeOkReturn();
slReturn usResp = syncSerial(syncUBX, clientData);
if (isErrorReturn(usResp))
return makeErrorMsgReturn(ERR_CAUSE(usResp), "could not synchronize UBX protocol");
slReturn resp = ubxSetNMEAData(clientData->fdPort, clientData->verbosity, clientData->nmea);
if (isErrorReturn(resp))
return makeErrorFmtMsgReturn(ERR_CAUSE(resp), "failed to turn NMEA data %s", clientData->nmea ? "on" : "off");
return makeOkReturn();
}
// Query action function, which queries the U-Blox GPS for the specified data.
static slReturn actionQuery(const optionDef_slOptions* defs, const psloConfig* config) {
clientData_slOptions* clientData = config->clientData;
slReturn usResp = syncSerial(syncUBX, clientData);
if (isErrorReturn(usResp))
return makeErrorMsgReturn(ERR_CAUSE(usResp), "could not synchronize UBX protocol");
slReturn resp;
switch (clientData->queryType) {
case fixQuery: resp = doFixQuery(clientData); break;
case versionQuery: resp = doVersionQuery(clientData); break;
case configQuery: resp = doConfigQuery(clientData); break;