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direwolf/aprs_tt.c

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//
// This file is part of Dire Wolf, an amateur radio packet TNC.
//
// Copyright (C) 2013, 2014, 2015 John Langner, WB2OSZ
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 2 of the License, or
// (at your option) any later version.
//
// 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/>.
//
/*------------------------------------------------------------------
*
* Module: aprs_tt.c
*
* Purpose: APRStt gateway.
*
* Description: Transfer touch tone messages into the APRS network.
*
* References: This is based upon APRStt (TM) documents with some
* artistic freedom.
*
* http://www.aprs.org/aprstt.html
*
*---------------------------------------------------------------*/
#define APRS_TT_C 1
// TODO: clean up terminolgy.
// "Message" has a specific meaning in APRS and this is not it.
// Touch Tone sequence might be appropriate.
// What do we call the parts separated by * key? Entry? Field?
#include <math.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include <ctype.h>
#include <assert.h>
#include "direwolf.h"
#include "version.h"
#include "ax25_pad.h"
#include "hdlc_rec2.h" /* for process_rec_frame */
#include "textcolor.h"
#include "aprs_tt.h"
#include "tt_text.h"
#include "tt_user.h"
#include "symbols.h"
#include "latlong.h"
#include "dlq.h"
#include "demod.h" /* for alevel_t & demod_get_audio_level() */
#if __WIN32__
char *strtok_r(char *str, const char *delim, char **saveptr);
#endif
// geotranz
#include "utm.h"
#include "mgrs.h"
#include "usng.h"
#include "error_string.h"
/* Convert between degrees and radians. */
#define D2R(d) ((d) * M_PI / 180.)
#define R2D(r) ((r) * 180. / M_PI)
/*
* Touch Tone sequences are accumulated here until # terminator found.
* Kept separate for each audio channel so the gateway CAN be listening
* on multiple channels at the same time.
*/
#define MAX_MSG_LEN 100
static char msg_str[MAX_CHANS][MAX_MSG_LEN+1];
static int msg_len[MAX_CHANS];
static int parse_fields (char *msg);
static int parse_callsign (char *e);
static int parse_object_name (char *e);
static int parse_symbol (char *e);
static int parse_location (char *e);
static int parse_comment (char *e);
static int expand_macro (char *e);
static void raw_tt_data_to_app (int chan, char *msg);
static int find_ttloc_match (char *e, char *xstr, char *ystr, char *zstr, char *bstr, char *dstr);
/*------------------------------------------------------------------
*
* Name: aprs_tt_init
*
* Purpose: Initialize the APRStt gateway at system startup time.
*
* Inputs: Configuration options gathered by config.c.
*
* Global out: Make our own local copy of the structure here.
*
* Returns: None
*
* Description: The main program needs to call this at application
* start up time after reading the configuration file.
*
* TT_MAIN is defined for unit testing.
*
*----------------------------------------------------------------*/
static struct tt_config_s tt_config;
#if TT_MAIN
#define NUM_TEST_CONFIG (sizeof(test_config) / sizeof (struct ttloc_s))
static struct ttloc_s test_config[] = {
{ TTLOC_POINT, "B01", .point.lat = 12.25, .point.lon = 56.25 },
{ TTLOC_POINT, "B988", .point.lat = 12.50, .point.lon = 56.50 },
{ TTLOC_VECTOR, "B5bbbdddd", .vector.lat = 53., .vector.lon = -1., .vector.scale = 1000. }, /* km units */
/* Hilltop Tower http://www.aprs.org/aprs-jamboree-2013.html */
{ TTLOC_VECTOR, "B5bbbddd", .vector.lat = 37+55.37/60., .vector.lon = -(81+7.86/60.), .vector.scale = 16.09344 }, /* .01 mile units */
{ TTLOC_GRID, "B2xxyy", .grid.lat0 = 12.00, .grid.lon0 = 56.00,
.grid.lat9 = 12.99, .grid.lon9 = 56.99 },
{ TTLOC_GRID, "Byyyxxx", .grid.lat0 = 37 + 50./60.0, .grid.lon0 = 81,
.grid.lat9 = 37 + 59.99/60.0, .grid.lon9 = 81 + 9.99/60.0 },
{ TTLOC_SATSQ, "BAxxxx" },
{ TTLOC_MACRO, "xxyyy", .macro.definition = "B9xx*AB166*AA2B4C5B3B0Ayyy" },
{ TTLOC_MACRO, "xxxxzzzzzzzzzz", .macro.definition = "BAxxxx*ACzzzzzzzzzz" },
};
#endif
void aprs_tt_init (struct tt_config_s *p)
{
int c;
#if TT_MAIN
/* For unit testing. */
memset (&tt_config, 0, sizeof(struct tt_config_s));
tt_config.ttloc_size = NUM_TEST_CONFIG;
tt_config.ttloc_ptr = test_config;
tt_config.ttloc_len = NUM_TEST_CONFIG;
/* Don't care about xmit timing or corral here. */
#else
// TODO: Keep ptr instead of making a copy.
memcpy (&tt_config, p, sizeof(struct tt_config_s));
#endif
for (c=0; c<MAX_CHANS; c++) {
msg_len[c] = 0;
msg_str[c][0] = '\0';
}
}
/*------------------------------------------------------------------
*
* Name: aprs_tt_button
*
* Purpose: Process one received button press.
*
* Inputs: chan - Audio channel it came from.
*
* button 0123456789ABCD*# - Received button press.
* $ - No activity timeout.
* space - Quiet time filler.
*
* Returns: None
*
* Description: Individual key presses are accumulated here until
* the # message terminator is found.
* The complete message is then processed.
* The touch tone decoder sends $ if no activity
* for some amount of time, perhaps 5 seconds.
* A partially accumulated messge is discarded if
* there is a long gap.
*
* '.' means no activity during processing period.
* space, between blocks, shouldn't get here.
*
*----------------------------------------------------------------*/
#ifndef TT_MAIN
void aprs_tt_button (int chan, char button)
{
static int poll_period = 0;
assert (chan >= 0 && chan < MAX_CHANS);
//if (button != '.') {
// dw_printf ("aprs_tt_button (%d, '%c')\n", chan, button);
//}
// TODO: Might make more sense to put timeout here rather in the dtmf decoder.
if (button == '$') {
/* Timeout reset. */
msg_len[chan] = 0;
msg_str[chan][0] = '\0';
}
else if (button != '.' && button != ' ') {
if (msg_len[chan] < MAX_MSG_LEN) {
msg_str[chan][msg_len[chan]++] = button;
msg_str[chan][msg_len[chan]] = '\0';
}
if (button == '#') {
/*
* Put into the receive queue like any other packet.
* This way they are all processed by the common receive thread
* rather than the thread associated with the particular audio device.
*/
raw_tt_data_to_app (chan, msg_str[chan]);
msg_len[chan] = 0;
msg_str[chan][0] = '\0';
}
}
else {
/*
* Idle time. Poll occasionally for processing.
* Timing would be off we we are listening to more than
* one channel so do this only for the one specified
* in the TTOBJ command.
*/
if (chan == tt_config.obj_recv_chan) {
poll_period++;
if (poll_period >= 39) {
poll_period = 0;
tt_user_background ();
}
}
}
} /* end aprs_tt_button */
#endif
/*------------------------------------------------------------------
*
* Name: aprs_tt_sequence
*
* Purpose: Process complete received touch tone sequence
* terminated by #.
*
* Inputs: chan - Audio channel it came from.
*
* msg - String of DTMF buttons.
* # should be the final character.
*
* Returns: None
*
* Description: Process a complete message.
* It should have one or more fields separatedy by *
* and terminated by a final # like these:
*
* callsign #
* entry1 * callsign #
* entry1 * entry * callsign #
*
* Limitation: Has one set of static data for communication among
* group of functions. This shouldn't be a problem
* when receiving on multiple channels at once
* because they get serialized thru the receive packet queue.
*
*----------------------------------------------------------------*/
static char m_callsign[20]; /* really object name */
/*
* Standard APRStt has symbol code 'A' (box) with overlay of 0-9, A-Z.
*
* Dire Wolf extension allows:
* Symbol table '/' (primary), any symbol code.
* Symbol table '\' (alternate), any symbol code.
* Alternate table symbol code, overlay of 0-9, A-Z.
*/
static char m_symtab_or_overlay;
static char m_symbol_code;
static double m_longitude;
static double m_latitude;
static char m_comment[200];
static char m_freq[12];
static char m_mic_e;
static char m_dao[6];
static int m_ssid;
//#define G_UNKNOWN -999999
void aprs_tt_sequence (int chan, char *msg)
{
int err;
#if DEBUG
text_color_set(DW_COLOR_DEBUG);
dw_printf ("\n\"%s\"\n", msg);
#endif
/*
* Discard empty message.
* In case # is there as optional start.
*/
if (msg[0] == '#') return;
/*
* The parse functions will fill these in.
*/
strcpy (m_callsign, "");
m_symtab_or_overlay = '\\';
m_symbol_code = 'A';
m_longitude = G_UNKNOWN;
m_latitude = G_UNKNOWN;
strcpy (m_comment, "");
strcpy (m_freq, "");
m_mic_e = ' ';
strcpy (m_dao, "!T !"); /* start out unknown */
m_ssid = 12;
/*
* Parse the touch tone sequence.
*/
err = parse_fields (msg);
#if defined(DEBUG) || defined(TT_MAIN)
text_color_set(DW_COLOR_DEBUG);
dw_printf ("callsign=\"%s\", ssid=%d, symbol=\"%c%c\", freq=\"%s\", comment=\"%s\", lat=%.4f, lon=%.4f, dao=\"%s\"\n",
m_callsign, m_ssid, m_symtab_or_overlay, m_symbol_code, m_freq, m_comment, m_latitude, m_longitude, m_dao);
#endif
if (err == 0) {
/*
* Digested successfully. Add to our list of users and schedule transmissions.
*/
#ifndef TT_MAIN
err = tt_user_heard (m_callsign, m_ssid, m_symtab_or_overlay, m_symbol_code, m_latitude, m_longitude,
m_freq, m_comment, m_mic_e, m_dao);
#endif
}
// TODO send response to user.
// err == 0 OK, others, suitable error response.
} /* end aprs_tt_sequence */
/*------------------------------------------------------------------
*
* Name: parse_fields
*
* Purpose: Separate the complete string of touch tone characters
* into fields, delimited by *, and process each.
*
* Inputs: msg - String of DTMF buttons.
*
* Returns: None
*
* Description: It should have one or more fields separated by *.
*
* callsign #
* entry1 * callsign #
* entry1 * entry * callsign #
*
* Note that this will be used recursively when macros
* are expanded.
*
* "To iterate is human, to recurse divine."
*
* Returns: 0 for success or one of the TT_ERROR_... codes.
*
*----------------------------------------------------------------*/
static int parse_fields (char *msg)
{
char stemp[MAX_MSG_LEN+1];
char *e;
char *save;
strcpy (stemp, msg);
e = strtok_r (stemp, "*#", &save);
while (e != NULL) {
switch (*e) {
case 'A':
switch (e[1]) {
case 'A':
parse_object_name (e);
break;
case 'B':
parse_symbol (e);
break;
case 'C':
/*
* New in 1.2: test for 10 digit callsign.
*/
if (tt_call10_to_text(e+2,1,stemp) == 0) {
strcpy(m_callsign, stemp);
}
break;
default:
parse_callsign (e);
break;
}
break;
case 'B':
parse_location (e);
break;
case 'C':
parse_comment (e);
break;
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
expand_macro (e);
break;
case '\0':
/* Empty field. Just ignore it. */
/* This would happen if someone uses a leading *. */
break;
default:
text_color_set(DW_COLOR_ERROR);
dw_printf ("Entry does not start with A, B, C, or digit: \"%s\"\n", msg);
return (TT_ERROR_D_MSG);
}
e = strtok_r (NULL, "*#", &save);
}
return (0);
} /* end parse_fields */
/*------------------------------------------------------------------
*
* Name: expand_macro
*
* Purpose: Expand compact form "macro" to full format then process.
*
* Inputs: e - An "entry" extracted from a complete
* APRStt messsage.
* In this case, it should contain only digits.
*
* Returns: 0 for success or one of the TT_ERROR_... codes.
*
* Description: Separate out the fields, perform substitution,
* call parse_fields for processing.
*
*
* Future: Generalize this to allow any lower case letter for substitution?
*
*----------------------------------------------------------------*/
static int expand_macro (char *e)
{
int len;
int ipat;
char xstr[20], ystr[20], zstr[20], bstr[20], dstr[20];
char stemp[MAX_MSG_LEN+1];
char *d, *s;
text_color_set(DW_COLOR_DEBUG);
dw_printf ("Macro tone sequence: '%s'\n", e);
len = strlen(e);
ipat = find_ttloc_match (e, xstr, ystr, zstr, bstr, dstr);
if (ipat >= 0) {
// Why did we print b & d here?
// Documentation says only x, y, z can be used with macros.
// Only those 3 are processed below.
//dw_printf ("Matched pattern %3d: '%s', x=%s, y=%s, z=%s, b=%s, d=%s\n", ipat, tt_config.ttloc_ptr[ipat].pattern, xstr, ystr, zstr, bstr, dstr);
dw_printf ("Matched pattern %3d: '%s', x=%s, y=%s, z=%s\n", ipat, tt_config.ttloc_ptr[ipat].pattern, xstr, ystr, zstr);
dw_printf ("Replace with: '%s'\n", tt_config.ttloc_ptr[ipat].macro.definition);
if (tt_config.ttloc_ptr[ipat].type != TTLOC_MACRO) {
/* Found match to a different type. Really shouldn't be here. */
/* Print internal error message... */
dw_printf ("expand_macro: type != TTLOC_MACRO\n");
return (TT_ERROR_INTERNAL);
}
/*
* We found a match for the length and any fixed digits.
* Substitute values in to the definition.
*/
strcpy (stemp, "");
for (d = tt_config.ttloc_ptr[ipat].macro.definition; *d != '\0'; d++) {
while (( *d == 'x' || *d == 'y' || *d == 'z') && *d == d[1]) {
/* Collapse adjacent matching substitution characters. */
d++;
}
switch (*d) {
case 'x':
strcat (stemp, xstr);
break;
case 'y':
strcat (stemp, ystr);
break;
case 'z':
strcat (stemp, zstr);
break;
default:
{
char c1[2];
c1[0] = *d;
c1[1] = '\0';
strcat (stemp, c1);
}
break;
}
}
/*
* Process as if we heard this over the air.
*/
dw_printf ("After substitution: '%s'\n", stemp);
return (parse_fields (stemp));
}
else {
/* Send reject sound. */
/* Does not match any macro definitions. */
text_color_set(DW_COLOR_ERROR);
dw_printf ("Tone sequence did not match any pattern\n");
return (TT_ERROR_MACRO_NOMATCH);
}
/* should be unreachable */
return (0);
}
/*------------------------------------------------------------------
*
* Name: parse_callsign
*
* Purpose: Extract callsign or object name from touch tone message.
*
* Inputs: e - An "entry" extracted from a complete
* APRStt messsage.
* In this case, it should start with "A".
*
* Outputs: m_callsign
*
* m_symtab_or_overlay - Set to 0-9 or A-Z if specified.
*
* m_symbol_code - Always set to 'A'.
*
* Returns: 0 for success or one of the TT_ERROR_... codes.
*
* Description: We recognize 3 different formats:
*
* Annn - 3 digits are a tactical callsign. No overlay.
*
* Annnvk - Abbreviation with 3 digits, numeric overlay, checksum.
* Annnvvk - Abbreviation with 3 digits, letter overlay, checksum.
*
* Att...ttvk - Full callsign in two key method, numeric overlay, checksum.
* Att...ttvvk - Full callsign in two key method, letter overlay, checksum.
*
*
*----------------------------------------------------------------*/
static int checksum_not_ok (char *str, int len, char found)
{
int i;
int sum;
char expected;
sum = 0;
for (i=0; i<len; i++) {
if (isdigit(str[i])) {
sum += str[i] - '0';
}
else if (str[i] >= 'A' && str[i] <= 'D') {
sum += str[i] - 'A' + 10;
}
else {
text_color_set(DW_COLOR_ERROR);
dw_printf ("aprs_tt: checksum: bad character \"%c\" in checksum calculation!\n", str[i]);
}
}
expected = '0' + (sum % 10);
if (expected != found) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Bad checksum for \"%.*s\". Expected %c but received %c.\n", len, str, expected, found);
return (TT_ERROR_BAD_CHECKSUM);
}
return (0);
}
static int parse_callsign (char *e)
{
int len;
int c_length;
char tttemp[40], stemp[30];
assert (*e == 'A');
len = strlen(e);
/*
* special case: 3 digit tactical call.
*/
if (len == 4 && isdigit(e[1]) && isdigit(e[2]) && isdigit(e[3])) {
strcpy (m_callsign, e+1);
return (0);
}
/*
* 3 digit abbreviation: We only do the parsing here.
* Another part of application will try to find corresponding full call.
*/
if ((len == 6 && isdigit(e[1]) && isdigit(e[2]) && isdigit(e[3]) && isdigit(e[4]) && isdigit(e[5])) ||
(len == 7 && isdigit(e[1]) && isdigit(e[2]) && isdigit(e[3]) && isdigit(e[4]) && isupper(e[5]) && isdigit(e[6]))) {
int cs_err = checksum_not_ok (e+1, len-2, e[len-1]);
if (cs_err != 0) {
return (cs_err);
}
strncpy (m_callsign, e+1, 3);
m_callsign[3] = '\0';
if (len == 7) {
tttemp[0] = e[len-3];
tttemp[1] = e[len-2];
tttemp[2] = '\0';
tt_two_key_to_text (tttemp, 0, stemp);
m_symbol_code = 'A';
m_symtab_or_overlay = stemp[0];
}
else {
m_symbol_code = 'A';
m_symtab_or_overlay = e[len-2];
}
return (0);
}
/*
* Callsign in two key format.
*/
if (len >= 7 && len <= 24) {
int cs_err = checksum_not_ok (e+1, len-2, e[len-1]);
if (cs_err != 0) {
return (cs_err);
}
if (isupper(e[len-2])) {
strncpy (tttemp, e+1, len-4);
tttemp[len-4] = '\0';
tt_two_key_to_text (tttemp, 0, m_callsign);
tttemp[0] = e[len-3];
tttemp[1] = e[len-2];
tttemp[2] = '\0';
tt_two_key_to_text (tttemp, 0, stemp);
m_symbol_code = 'A';
m_symtab_or_overlay = stemp[0];
}
else {
strncpy (tttemp, e+1, len-3);
tttemp[len-3] = '\0';
tt_two_key_to_text (tttemp, 0, m_callsign);
m_symbol_code = 'A';
m_symtab_or_overlay = e[len-2];
}
return (0);
}
text_color_set(DW_COLOR_ERROR);
dw_printf ("Touch tone callsign not valid: \"%s\"\n", e);
return (TT_ERROR_INVALID_CALL);
}
/*------------------------------------------------------------------
*
* Name: parse_object_name
*
* Purpose: Extract object name from touch tone message.
*
* Inputs: e - An "entry" extracted from a complete
* APRStt messsage.
* In this case, it should start with "AA".
*
* Outputs: m_callsign
*
* m_ssid - Cleared to remove the default of 12.
*
* Returns: 0 for success or one of the TT_ERROR_... codes.
*
* Description: Data format
*
* AAtt...tt - Symbol name, two key method, up to 9 characters.
*
*----------------------------------------------------------------*/
static int parse_object_name (char *e)
{
int len;
int c_length;
char tttemp[40], stemp[30];
assert (e[0] == 'A');
assert (e[1] == 'A');
len = strlen(e);
/*
* Object name in two key format.
*/
if (len >= 2 + 1 && len <= 30) {
if (tt_two_key_to_text (e+2, 0, m_callsign) == 0) {
m_callsign[9] = '\0'; /* truncate to 9 */
m_ssid = 0; /* No ssid for object name */
return (0);
}
}
text_color_set(DW_COLOR_ERROR);
dw_printf ("Touch tone object name not valid: \"%s\"\n", e);
return (TT_ERROR_INVALID_OBJNAME);
} /* end parse_oject_name */
/*------------------------------------------------------------------
*
* Name: parse_symbol
*
* Purpose: Extract symbol from touch tone message.
*
* Inputs: e - An "entry" extracted from a complete
* APRStt messsage.
* In this case, it should start with "AB".
*
* Outputs: m_symtab_or_overlay
*
* m_symbol_code
*
* Returns: 0 for success or one of the TT_ERROR_... codes.
*
* Description: Data format
*
* AB1nn - Symbol from primary symbol table.
* Two digits nn are the same as in the GPSCnn
* generic address used as a destination.
*
* AB2nn - Symbol from alternate symbol table.
* Two digits nn are the same as in the GPSEnn
* generic address used as a destination.
*
* AB0nnvv - Symbol from alternate symbol table.
* Two digits nn are the same as in the GPSEnn
* generic address used as a destination.
* vv is an overlay digit or letter in two key method.
*
*----------------------------------------------------------------*/
static int parse_symbol (char *e)
{
int len;
char nstr[4];
int nn;
char stemp[10];
assert (e[0] == 'A');
assert (e[1] == 'B');
len = strlen(e);
if (len >= 4 && len <= 10) {
nstr[0] = e[3];
nstr[1] = e[4];
nstr[2] = '\0';
nn = atoi (nstr);
if (nn < 1) {
nn = 1;
}
else if (nn > 94) {
nn = 94;
}
switch (e[2]) {
case '1':
m_symtab_or_overlay = '/';
m_symbol_code = 32 + nn;
return (0);
break;
case '2':
m_symtab_or_overlay = '\\';
m_symbol_code = 32 + nn;
return (0);
break;
case '0':
if (len >= 6) {
if (tt_two_key_to_text (e+5, 0, stemp) == 0) {
m_symbol_code = 32 + nn;
m_symtab_or_overlay = stemp[0];
return (0);
}
}
break;
}
}
text_color_set(DW_COLOR_ERROR);
dw_printf ("Touch tone symbol not valid: \"%s\"\n", e);
return (TT_ERROR_INVALID_SYMBOL);
} /* end parse_oject_name */
/*------------------------------------------------------------------
*
* Name: parse_location
*
* Purpose: Extract location from touch tone message.
*
* Inputs: e - An "entry" extracted from a complete
* APRStt messsage.
* In this case, it should start with "B".
*
* Outputs: m_latitude
* m_longitude
* m_dao
*
* Returns: 0 for success or one of the TT_ERROR_... codes.
*
* Description: There are many different formats recognizable
* by total number of digits and sometimes the first digit.
*
* We handle most of them in a general way, processing
* them in 5 groups:
*
* * points
* * vector
* * grid
* * utm
* * usng / mgrs
*
*----------------------------------------------------------------*/
/* Average radius of earth in meters. */
#define R 6371000.
static int parse_location (char *e)
{
int len;
int ipat;
char xstr[20], ystr[20], zstr[20], bstr[20], dstr[20];
double x, y, dist, bearing;
double lat0, lon0;
double lat9, lon9;
long lerr;
double easting, northing;
char mh[20];
assert (*e == 'B');
m_dao[2] = e[0];
m_dao[3] = e[1]; /* Type of location. e.g. !TB6! */
/* Will be changed by point types. */
/* If this ever changes, be sure to update corresponding */
/* section in process_comment() in decode_aprs.c */
len = strlen(e);
ipat = find_ttloc_match (e, xstr, ystr, zstr, bstr, dstr);
if (ipat >= 0) {
//dw_printf ("ipat=%d, x=%s, y=%s, b=%s, d=%s\n", ipat, xstr, ystr, bstr, dstr);
switch (tt_config.ttloc_ptr[ipat].type) {
case TTLOC_POINT:
m_latitude = tt_config.ttloc_ptr[ipat].point.lat;
m_longitude = tt_config.ttloc_ptr[ipat].point.lon;
/* Is it one of ten or a hundred positions? */
/* It's not hardwired to always be B0n or B9nn. */
/* This is a pretty good approximation. */
if (strlen(e) == 3) { /* probably B0n --> !Tn ! */
m_dao[2] = e[2];
m_dao[3] = ' ';
}
if (strlen(e) == 4) { /* probably B9nn --> !Tnn! */
m_dao[2] = e[2];
m_dao[3] = e[3];
}
break;
case TTLOC_VECTOR:
if (strlen(bstr) != 3) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Bearing \"%s\" should be 3 digits.\n", bstr);
// return error code?
}
if (strlen(dstr) < 1) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Distance \"%s\" should 1 or more digits.\n", dstr);
// return error code?
}
lat0 = D2R(tt_config.ttloc_ptr[ipat].vector.lat);
lon0 = D2R(tt_config.ttloc_ptr[ipat].vector.lon);
dist = atof(dstr) * tt_config.ttloc_ptr[ipat].vector.scale;
bearing = D2R(atof(bstr));
/* Equations and caluculators found here: */
/* http://movable-type.co.uk/scripts/latlong.html */
/* This should probably be a function in latlong.c in case we have another use for it someday. */
m_latitude = R2D(asin(sin(lat0) * cos(dist/R) + cos(lat0) * sin(dist/R) * cos(bearing)));
m_longitude = R2D(lon0 + atan2(sin(bearing) * sin(dist/R) * cos(lat0),
cos(dist/R) - sin(lat0) * sin(D2R(m_latitude))));
break;
case TTLOC_GRID:
if (strlen(xstr) == 0) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Missing X coordinate.\n");
strcpy (xstr, "0");
}
if (strlen(ystr) == 0) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Missing Y coordinate.\n");
strcpy (ystr, "0");
}
lat0 = tt_config.ttloc_ptr[ipat].grid.lat0;
lat9 = tt_config.ttloc_ptr[ipat].grid.lat9;
y = atof(ystr);
m_latitude = lat0 + y * (lat9-lat0) / (pow(10., strlen(ystr)) - 1.);
lon0 = tt_config.ttloc_ptr[ipat].grid.lon0;
lon9 = tt_config.ttloc_ptr[ipat].grid.lon9;
x = atof(xstr);
m_longitude = lon0 + x * (lon9-lon0) / (pow(10., strlen(xstr)) - 1.);
break;
case TTLOC_UTM:
if (strlen(xstr) == 0) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Missing X coordinate.\n");
/* Avoid divide by zero later. Put in middle of range. */
strcpy (xstr, "5");
}
if (strlen(ystr) == 0) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Missing Y coordinate.\n");
/* Avoid divide by zero later. Put in middle of range. */
strcpy (ystr, "5");
}
x = atof(xstr);
easting = x * tt_config.ttloc_ptr[ipat].utm.scale + tt_config.ttloc_ptr[ipat].utm.x_offset;
y = atof(ystr);
northing = y * tt_config.ttloc_ptr[ipat].utm.scale + tt_config.ttloc_ptr[ipat].utm.y_offset;
lerr = Convert_UTM_To_Geodetic(tt_config.ttloc_ptr[ipat].utm.lzone,
tt_config.ttloc_ptr[ipat].utm.hemi, easting, northing, &lat0, &lon0);
if (lerr == 0) {
m_latitude = R2D(lat0);
m_longitude = R2D(lon0);
//printf ("DEBUG: from UTM, latitude = %.6f, longitude = %.6f\n", m_latitude, m_longitude);
}
else {
char message[300];
text_color_set(DW_COLOR_ERROR);
utm_error_string (lerr, message);
dw_printf ("Conversion from UTM failed:\n%s\n\n", message);
}
break;
case TTLOC_MGRS:
case TTLOC_USNG:
if (strlen(xstr) == 0) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("MGRS/USNG: Missing X (easting) coordinate.\n");
/* Should not be possible to get here. Fake it and carry on. */
strcpy (xstr, "5");
}
if (strlen(ystr) == 0) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("MGRS/USNG: Missing Y (northing) coordinate.\n");
/* Should not be possible to get here. Fake it and carry on. */
strcpy (ystr, "5");
}
char loc[40];
strcpy (loc, tt_config.ttloc_ptr[ipat].mgrs.zone);
strcat (loc, xstr);
strcat (loc, ystr);
//text_color_set(DW_COLOR_DEBUG);
//dw_printf ("MGRS/USNG location debug: %s\n", loc);
if (tt_config.ttloc_ptr[ipat].type == TTLOC_MGRS)
lerr = Convert_MGRS_To_Geodetic(loc, &lat0, &lon0);
else
lerr = Convert_USNG_To_Geodetic(loc, &lat0, &lon0);
if (lerr == 0) {
m_latitude = R2D(lat0);
m_longitude = R2D(lon0);
//printf ("DEBUG: from MGRS/USNG, latitude = %.6f, longitude = %.6f\n", m_latitude, m_longitude);
}
else {
char message[300];
text_color_set(DW_COLOR_ERROR);
mgrs_error_string (lerr, message);
dw_printf ("Conversion from MGRS/USNG failed:\n%s\n\n", message);
}
break;
case TTLOC_SATSQ:
if (strlen(xstr) != 4) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Expected 4 digits for the Satellite Square.\n");
return (TT_ERROR_SATSQ);
}
/* Convert 4 digits to usual AA99 form, then to location. */
if (tt_gridsquare_to_text (xstr, 0, mh) == 0) {
ll_from_grid_square (mh, &m_latitude, &m_longitude);
}
break;
default:
assert (0);
}
return (0);
}
/* Send reject sound. */
/* Does not match any location specification. */
return (TT_ERROR_INVALID_LOC);
} /* end parse_location */
/*------------------------------------------------------------------
*
* Name: find_ttloc_match
*
* Purpose: Try to match the received position report to a pattern
* defined in the configuration file.
*
* Inputs: e - An "entry" extracted from a complete
* APRStt messsage.
* In this case, it should start with "B".
*
* Outputs: xstr - All digits matching x positions in configuration.
* ystr - y
* zstr - z
* bstr - b
* dstr - d
*
* Returns: >= 0 for index into table if found.
* -1 if not found.
*
* Description:
*
*----------------------------------------------------------------*/
static int find_ttloc_match (char *e, char *xstr, char *ystr, char *zstr, char *bstr, char *dstr)
{
int ipat; /* Index into patterns from configuration file */
int len; /* Length of pattern we are trying to match. */
int match;
char mc;
int k;
// debug dw_printf ("find_ttloc_match: e=%s\n", e);
for (ipat=0; ipat<tt_config.ttloc_len; ipat++) {
len = strlen(tt_config.ttloc_ptr[ipat].pattern);
if (strlen(e) == len) {
match = 1;
strcpy (xstr, "");
strcpy (ystr, "");
strcpy (zstr, "");
strcpy (bstr, "");
strcpy (dstr, "");
for (k=0; k<len; k++) {
mc = tt_config.ttloc_ptr[ipat].pattern[k];
switch (mc) {
case 'B':
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
case 'A': /* Allow A,C,D after the B? */
case 'C':
case 'D':
if (e[k] != mc) {
match = 0;
}
break;
case 'x':
if (isdigit(e[k])) {
char stemp[2];
stemp[0] = e[k];
stemp[1] = '\0';
strcat (xstr, stemp);
}
else {
match = 0;
}
break;
case 'y':
if (isdigit(e[k])) {
char stemp[2];
stemp[0] = e[k];
stemp[1] = '\0';
strcat (ystr, stemp);
}
else {
match = 0;
}
break;
case 'z':
if (isdigit(e[k])) {
char stemp[2];
stemp[0] = e[k];
stemp[1] = '\0';
strcat (zstr, stemp);
}
else {
match = 0;
}
break;
case 'b':
if (isdigit(e[k])) {
char stemp[2];
stemp[0] = e[k];
stemp[1] = '\0';
strcat (bstr, stemp);
}
else {
match = 0;
}
break;
case 'd':
if (isdigit(e[k])) {
char stemp[2];
stemp[0] = e[k];
stemp[1] = '\0';
strcat (dstr, stemp);
}
else {
match = 0;
}
break;
default:
dw_printf ("find_ttloc_match: shouldn't be here.\n");
/* Shouldn't be here. */
match = 0;
break;
} /* switch */
} /* for k */
if (match) {
return (ipat);
}
} /* if strlen */
}
return (-1);
} /* end find_ttloc_match */
/*------------------------------------------------------------------
*
* Name: parse_comment
*
* Purpose: Extract comment / status or other special information from touch tone message.
*
* Inputs: e - An "entry" extracted from a complete
* APRStt messsage.
* In this case, it should start with "C".
*
* Outputs: m_comment
* m_mic_e
*
* Returns: 0 for success or one of the TT_ERROR_... codes.
*
* Description: We recognize these different formats:
*
* Cn - One digit for MIC-E position comment.
* Always / plus exactly 10 characters.
*
* Cnnnnnn - Six digit frequency reformatted as nnn.nnnMHz
*
* Cttt...tttt - General comment in Multi-press encoding.
*
*----------------------------------------------------------------*/
static int parse_comment (char *e)
{
int len;
int n;
assert (*e == 'C');
len = strlen(e);
if (len == 2 && isdigit(e[1])) {
m_mic_e = e[1];
return (0);
}
if (len == 7 && isdigit(e[1]) && isdigit(e[2]) && isdigit(e[3]) && isdigit(e[4]) && isdigit(e[5]) && isdigit(e[6])) {
m_freq[0] = e[1];
m_freq[1] = e[2];
m_freq[2] = e[3];
m_freq[3] = '.';
m_freq[4] = e[4];
m_freq[5] = e[5];
m_freq[6] = e[6];
m_freq[7] = 'M';
m_freq[8] = 'H';
m_freq[9] = 'z';
m_freq[10] = '\0';
return (0);
}
tt_multipress_to_text (e+1, 0, m_comment);
return (0);
}
/*------------------------------------------------------------------
*
* Name: raw_tt_data_to_app
*
* Purpose: Send raw touch tone data to application.
*
* Inputs: chan - Channel where touch tone data heard.
* msg - String of button pushes.
* Normally ends with #.
*
* Global In: m_callsign
* m_symtab_or_overlay
* m_symbol_code
*
* Returns: None
*
* Description:
* Put raw touch tone message in a packet and send to application.
* The APRS protocol does not have provision for this.
* For now, use the unused "t" message type.
* TODO: Get an officially sanctioned method.
*
* Use callsign for source if available.
* Encode the overlay in the destination.
*
*----------------------------------------------------------------*/
static void raw_tt_data_to_app (int chan, char *msg)
{
#if TT_MAIN
return ;
#else
char src[10], dest[10];
char raw_tt_msg[200];
packet_t pp;
char *c, *s;
int i;
int err;
alevel_t alevel;
// Set source and dest to something valid to keep rest of processing happy.
// For lack of a better idea, make source "DTMF" to indicate where it came from.
// Application version might be useful in case we end up using different
// message formats in later versions.
strcpy (src, "DTMF");
sprintf (dest, "%s%d%d", APP_TOCALL, MAJOR_VERSION, MINOR_VERSION);
sprintf (raw_tt_msg, "%s>%s:t%s", src, dest, msg);
pp = ax25_from_text (raw_tt_msg, 1);
/*
* Process like a normal received frame.
* NOTE: This goes directly to application rather than
* thru the multi modem duplicate processing.
*
* Should we use a different type so it can be easily
* distinguished later?
*
* We try to capture an overall audio level here.
* Mark and space do not apply in this case.
* This currently doesn't get displayed but we might want it someday.
*/
if (pp != NULL) {
alevel = demod_get_audio_level (chan, 0);
alevel.mark = -2;
alevel.space = -2;
dlq_append (DLQ_REC_FRAME, chan, -1, pp, alevel, RETRY_NONE, "tt");
}
else {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Could not convert \"%s\" into APRS packet.\n", raw_tt_msg);
}
#endif
}
/*------------------------------------------------------------------
*
* Name: main
*
* Purpose: Unit test for this file.
*
* Description: Run unit test like this:
*
* rm a.exe ; gcc tt_text.c -DTT_MAIN -DDEBUG aprs_tt.c latlong.c strtok_r.o utm/LatLong-UTMconversion.c ; ./a.exe
*
* Bugs: No automatic checking.
* Just eyeball it to see if things look right.
*
*----------------------------------------------------------------*/
#if TT_MAIN
void text_color_set (dw_color_t c) { return; }
int dw_printf (const char *fmt, ...)
{
va_list args;
int len;
va_start (args, fmt);
len = vprintf (fmt, args);
va_end (args);
return (len);
}
int main (int argc, char *argv[])
{
char text[256], buttons[256];
int n;
dw_printf ("Hello, world!\n");
aprs_tt_init (NULL);
//if (argc < 2) {
//dw_printf ("Supply text string on command line.\n");
//exit (1);
//}
/* Callsigns & abbreviations. */
aprs_tt_sequence (0, "A9A2B42A7A7C71#"); /* WB4APR/7 */
aprs_tt_sequence (0, "A27773#"); /* abbreviated form */
/* Example in http://www.aprs.org/aprstt/aprstt-coding24.txt has a bad checksum! */
aprs_tt_sequence (0, "A27776#"); /* Expect error message. */
aprs_tt_sequence (0, "A2A7A7C71#"); /* Spelled suffix, overlay, checksum */
aprs_tt_sequence (0, "A27773#"); /* Suffix digits, overlay, checksum */
aprs_tt_sequence (0, "A9A2B26C7D9D71#"); /* WB2OSZ/7 numeric overlay */
aprs_tt_sequence (0, "A67979#"); /* abbreviated form */
aprs_tt_sequence (0, "A9A2B26C7D9D5A9#"); /* WB2OSZ/J letter overlay */
aprs_tt_sequence (0, "A6795A7#"); /* abbreviated form */
aprs_tt_sequence (0, "A277#"); /* Tactical call "277" no overlay and no checksum */
/* Locations */
aprs_tt_sequence (0, "B01*A67979#");
aprs_tt_sequence (0, "B988*A67979#");
/* expect about 52.79 +0.83 */
aprs_tt_sequence (0, "B51000125*A67979#");
/* Try to get from Hilltop Tower to Archery & Target Range. */
/* Latitude comes out ok, 37.9137 -> 55.82 min. */
/* Longitude -81.1254 -> 8.20 min */
aprs_tt_sequence (0, "B5206070*A67979#");
aprs_tt_sequence (0, "B21234*A67979#");
aprs_tt_sequence (0, "B533686*A67979#");
/* Comments */
aprs_tt_sequence (0, "C1");
aprs_tt_sequence (0, "C2");
aprs_tt_sequence (0, "C146520");
aprs_tt_sequence (0, "C7788444222550227776669660333666990122223333");
/* Macros */
aprs_tt_sequence (0, "88345");
/* 10 digit representation for callsign & satellite grid. WB4APR near 39.5, -77 */
aprs_tt_sequence (0, "AC9242771558*BA1819");
aprs_tt_sequence (0, "18199242771558");
return(0);
} /* end main */
#endif
/* end aprs_tt.c */
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