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direwolf/direwolf.c
WB2OSZ 74ac4812d5 New client side packet filter to select "messages" only to stations that have been heard nearby recently. This is now the default if no IS to RF filter is specified. 
Expanded debug options so you can understand what is going on with packet filtering.

Added new document Successful-APRS-IGate-Operation.pdf with IGate background, configuration, and troubleshooting tips.
2017-01-01 11:49:55 -05:00

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//
// This file is part of Dire Wolf, an amateur radio packet TNC.
//
// Copyright (C) 2011, 2012, 2013, 2014, 2015, 2016 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: direwolf.c
*
* Purpose: Main program for "Dire Wolf" which includes:
*
* AFSK modem using the "sound card."
* AX.25 encoder/decoder.
* APRS data encoder / decoder.
* APRS digipeater.
* KISS TNC emulator.
* APRStt (touch tone input) gateway
* Internet Gateway (IGate)
*
*
*---------------------------------------------------------------*/
#define DIREWOLF_C 1
#include "direwolf.h"
#include <stdio.h>
#include <math.h>
#include <stdlib.h>
#include <getopt.h>
#include <assert.h>
#include <string.h>
#include <signal.h>
#include <ctype.h>
#if __ARM__
//#include <asm/hwcap.h>
//#include <sys/auxv.h> // Doesn't seem to be there.
// We have libc 2.13. Looks like we might need 2.17 & gcc 4.8
#endif
#if __WIN32__
#else
#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#ifdef __OpenBSD__
#include <soundcard.h>
#elif __APPLE__
#else
#include <sys/soundcard.h>
#endif
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#endif
#if USE_HAMLIB
#include <hamlib/rig.h>
#endif
#include "version.h"
#include "audio.h"
#include "config.h"
#include "multi_modem.h"
#include "demod.h"
#include "hdlc_rec.h"
#include "hdlc_rec2.h"
#include "ax25_pad.h"
#include "xid.h"
#include "decode_aprs.h"
#include "textcolor.h"
#include "server.h"
#include "kiss.h"
#include "kissnet.h"
#include "kiss_frame.h"
#include "waypoint.h"
#include "gen_tone.h"
#include "digipeater.h"
#include "cdigipeater.h"
#include "tq.h"
#include "xmit.h"
#include "ptt.h"
#include "beacon.h"
#include "dtmf.h"
#include "aprs_tt.h"
#include "tt_user.h"
#include "igate.h"
#include "pfilter.h"
#include "symbols.h"
#include "dwgps.h"
#include "waypoint.h"
#include "log.h"
#include "recv.h"
#include "morse.h"
#include "mheard.h"
#include "ax25_link.h"
//static int idx_decoded = 0;
#if __WIN32__
static BOOL cleanup_win (int);
#else
static void cleanup_linux (int);
#endif
static void usage (char **argv);
#if defined(__SSE__) && !defined(__APPLE__)
static void __cpuid(int cpuinfo[4], int infotype){
__asm__ __volatile__ (
"cpuid":
"=a" (cpuinfo[0]),
"=b" (cpuinfo[1]),
"=c" (cpuinfo[2]),
"=d" (cpuinfo[3]):
"a" (infotype)
);
}
#endif
/*-------------------------------------------------------------------
*
* Name: main
*
* Purpose: Main program for packet radio virtual TNC.
*
* Inputs: Command line arguments.
* See usage message for details.
*
* Outputs: Decoded information is written to stdout.
*
* A socket and pseudo terminal are created for
* for communication with other applications.
*
*--------------------------------------------------------------------*/
static struct audio_s audio_config;
static struct tt_config_s tt_config;
//struct digi_config_s digi_config;
//struct cdigi_config_s cdigi_config;
static const int audio_amplitude = 100; /* % of audio sample range. */
/* This translates to +-32k for 16 bit samples. */
/* Currently no option to change this. */
static int d_u_opt = 0; /* "-d u" command line option to print UTF-8 also in hexadecimal. */
static int d_p_opt = 0; /* "-d p" option for dumping packets over radio. */
static int q_h_opt = 0; /* "-q h" Quiet, suppress the "heard" line with audio level. */
static int q_d_opt = 0; /* "-q d" Quiet, suppress the printing of decoded of APRS packets. */
static struct misc_config_s misc_config;
int main (int argc, char *argv[])
{
int err;
//int eof;
int j;
char config_file[100];
int xmit_calibrate_option = 0;
int enable_pseudo_terminal = 0;
struct digi_config_s digi_config;
struct cdigi_config_s cdigi_config;
struct igate_config_s igate_config;
int r_opt = 0, n_opt = 0, b_opt = 0, B_opt = 0, D_opt = 0; /* Command line options. */
char P_opt[16];
char l_opt[80];
char input_file[80];
int t_opt = 1; /* Text color option. */
int a_opt = 0; /* "-a n" interval, in seconds, for audio statistics report. 0 for none. */
int d_k_opt = 0; /* "-d k" option for serial port KISS. Can be repeated for more detail. */
int d_n_opt = 0; /* "-d n" option for Network KISS. Can be repeated for more detail. */
int d_t_opt = 0; /* "-d t" option for Tracker. Can be repeated for more detail. */
int d_g_opt = 0; /* "-d g" option for GPS. Can be repeated for more detail. */
int d_o_opt = 0; /* "-d o" option for output control such as PTT and DCD. */
int d_i_opt = 0; /* "-d i" option for IGate. Repeat for more detail */
int d_m_opt = 0; /* "-d m" option for mheard list. */
int d_f_opt = 0; /* "-d f" option for filtering. Repeat for more detail. */
#if USE_HAMLIB
int d_h_opt = 0; /* "-d h" option for hamlib debugging. Repeat for more detail */
#endif
int E_tx_opt = 0; /* "-E n" Error rate % for clobbering trasmit frames. */
int E_rx_opt = 0; /* "-E Rn" Error rate % for clobbering receive frames. */
strlcpy(l_opt, "", sizeof(l_opt));
strlcpy(P_opt, "", sizeof(P_opt));
#if __WIN32__
// Select UTF-8 code page for console output.
// http://msdn.microsoft.com/en-us/library/windows/desktop/ms686036(v=vs.85).aspx
// This is the default I see for windows terminal:
// >chcp
// Active code page: 437
//Restore on exit? oldcp = GetConsoleOutputCP();
SetConsoleOutputCP(CP_UTF8);
#else
/*
* Default on Raspian & Ubuntu Linux is fine. Don't know about others.
*
* Should we look at LANG environment variable and issue a warning
* if it doesn't look something like en_US.UTF-8 ?
*/
#endif
/*
* Pre-scan the command line options for the text color option.
* We need to set this before any text output.
*/
t_opt = 1; /* 1 = normal, 0 = no text colors. */
for (j=1; j<argc-1; j++) {
if (strcmp(argv[j], "-t") == 0) {
t_opt = atoi (argv[j+1]);
//dw_printf ("DEBUG: text color option = %d.\n", t_opt);
}
}
// TODO: control development/beta/release by version.h instead of changing here.
// Print platform. This will provide more information when people send a copy the information displayed.
// Might want to print OS version here. For Windows, see:
// https://msdn.microsoft.com/en-us/library/ms724451(v=VS.85).aspx
text_color_init(t_opt);
text_color_set(DW_COLOR_INFO);
//dw_printf ("Dire Wolf version %d.%d (%s) Beta Test\n", MAJOR_VERSION, MINOR_VERSION, __DATE__);
dw_printf ("Dire Wolf DEVELOPMENT version %d.%d %s (%s)\n", MAJOR_VERSION, MINOR_VERSION, "G", __DATE__);
//dw_printf ("Dire Wolf version %d.%d\n", MAJOR_VERSION, MINOR_VERSION);
#if defined(ENABLE_GPSD) || defined(USE_HAMLIB)
dw_printf ("Includes optional support for: ");
#if defined(ENABLE_GPSD)
dw_printf (" gpsd");
#endif
#if defined(USE_HAMLIB)
dw_printf (" hamlib");
#endif
dw_printf ("\n");
#endif
#if __WIN32__
SetConsoleCtrlHandler ((PHANDLER_ROUTINE)cleanup_win, TRUE);
#else
setlinebuf (stdout);
signal (SIGINT, cleanup_linux);
#endif
/*
* Starting with version 0.9, the prebuilt Windows version
* requires a minimum of a Pentium 3 or equivalent so we can
* use the SSE instructions.
* Try to warn anyone using a CPU from the previous
* century rather than just dying for no apparent reason.
*
* Apple computers with Intel processors started with P6. Since the
* cpu test code was giving Clang compiler grief it has been excluded.
*
* Now, where can I find a Pentium 2 or earlier to test this?
*/
#if defined(__SSE__) && !defined(__APPLE__)
int cpuinfo[4];
__cpuid (cpuinfo, 0);
if (cpuinfo[0] >= 1) {
__cpuid (cpuinfo, 1);
//dw_printf ("debug: cpuinfo = %x, %x, %x, %x\n", cpuinfo[0], cpuinfo[1], cpuinfo[2], cpuinfo[3]);
if ( ! ( cpuinfo[3] & (1 << 25))) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("------------------------------------------------------------------\n");
dw_printf ("This version requires a minimum of a Pentium 3 or equivalent.\n");
dw_printf ("If you are seeing this message, you are probably using a computer\n");
dw_printf ("from the previous century. See comments in Makefile.win for\n");
dw_printf ("information on how you can recompile it for use with your antique.\n");
dw_printf ("------------------------------------------------------------------\n");
}
}
text_color_set(DW_COLOR_INFO);
#endif
/*
* Default location of configuration file is current directory.
* Can be overridden by -c command line option.
* TODO: Automatically search other places.
*/
strlcpy (config_file, "direwolf.conf", sizeof(config_file));
/*
* Look at command line options.
* So far, the only one is the configuration file location.
*/
strlcpy (input_file, "", sizeof(input_file));
while (1) {
//int this_option_optind = optind ? optind : 1;
int option_index = 0;
int c;
char *p;
static struct option long_options[] = {
{"future1", 1, 0, 0},
{"future2", 0, 0, 0},
{"future3", 1, 0, 'c'},
{0, 0, 0, 0}
};
/* ':' following option character means arg is required. */
c = getopt_long(argc, argv, "P:B:D:c:pxr:b:n:d:q:t:Ul:Sa:E:",
long_options, &option_index);
if (c == -1)
break;
switch (c) {
case 0: /* possible future use */
text_color_set(DW_COLOR_DEBUG);
dw_printf("option %s", long_options[option_index].name);
if (optarg) {
dw_printf(" with arg %s", optarg);
}
dw_printf("\n");
break;
case 'a': /* -a for audio statistics interval */
a_opt = atoi(optarg);
if (a_opt < 0) a_opt = 0;
if (a_opt < 10) {
text_color_set(DW_COLOR_ERROR);
dw_printf("Setting such a small audio statistics interval will produce inaccurate sample rate display.\n");
}
break;
case 'c': /* -c for configuration file name */
strlcpy (config_file, optarg, sizeof(config_file));
break;
#if __WIN32__
#else
case 'p': /* -p enable pseudo terminal */
/* We want this to be off by default because it hangs */
/* eventually when nothing is reading from other side. */
enable_pseudo_terminal = 1;
break;
#endif
case 'B': /* -B baud rate and modem properties. */
B_opt = atoi(optarg);
if (B_opt < MIN_BAUD || B_opt > MAX_BAUD) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Use a more reasonable data baud rate in range of %d - %d.\n", MIN_BAUD, MAX_BAUD);
exit (EXIT_FAILURE);
}
break;
case 'P': /* -P for modem profile. */
//debug: dw_printf ("Demodulator profile set to \"%s\"\n", optarg);
strlcpy (P_opt, optarg, sizeof(P_opt));
break;
case 'D': /* -D decrease AFSK demodulator sample rate */
D_opt = atoi(optarg);
if (D_opt < 1 || D_opt > 8) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Crazy value for -D. \n");
exit (EXIT_FAILURE);
}
break;
case 'x': /* -x for transmit calibration tones. */
xmit_calibrate_option = 1;
break;
case 'r': /* -r audio samples/sec. e.g. 44100 */
r_opt = atoi(optarg);
if (r_opt < MIN_SAMPLES_PER_SEC || r_opt > MAX_SAMPLES_PER_SEC)
{
text_color_set(DW_COLOR_ERROR);
dw_printf("-r option, audio samples/sec, is out of range.\n");
r_opt = 0;
}
break;
case 'n': /* -n number of audio channels for first audio device. 1 or 2. */
n_opt = atoi(optarg);
if (n_opt < 1 || n_opt > 2)
{
text_color_set(DW_COLOR_ERROR);
dw_printf("-n option, number of audio channels, is out of range.\n");
n_opt = 0;
}
break;
case 'b': /* -b bits per sample. 8 or 16. */
b_opt = atoi(optarg);
if (b_opt != 8 && b_opt != 16)
{
text_color_set(DW_COLOR_ERROR);
dw_printf("-b option, bits per sample, must be 8 or 16.\n");
b_opt = 0;
}
break;
case '?':
/* Unknown option message was already printed. */
usage (argv);
break;
case 'd': /* Set debug option. */
/* New in 1.1. Can combine multiple such as "-d pkk" */
for (p=optarg; *p!='\0'; p++) {
switch (*p) {
case 'a': server_set_debug(1); break;
case 'k': d_k_opt++; kiss_serial_set_debug (d_k_opt); break;
case 'n': d_n_opt++; kiss_net_set_debug (d_n_opt); break;
case 'u': d_u_opt = 1; break;
// separate out gps & waypoints.
case 'g': d_g_opt++; break;
case 'w': waypoint_set_debug (1); break; // not documented yet.
case 't': d_t_opt++; beacon_tracker_set_debug (d_t_opt); break;
case 'p': d_p_opt = 1; break; // TODO: packet dump for xmit side.
case 'o': d_o_opt++; ptt_set_debug(d_o_opt); break;
case 'i': d_i_opt++; break;
case 'm': d_m_opt++; break;
case 'f': d_f_opt++; break;
#if AX25MEMDEBUG
case 'l': ax25memdebug_set(); break; // Track down memory Leak. Not documented.
#endif // Previously 'm' but that is now used for mheard.
#if USE_HAMLIB
case 'h': d_h_opt++; break; // Hamlib verbose level.
#endif
default: break;
}
}
break;
case 'q': /* Set quiet option. */
/* New in 1.2. Quiet option to suppress some types of printing. */
/* Can combine multiple such as "-q hd" */
for (p=optarg; *p!='\0'; p++) {
switch (*p) {
case 'h': q_h_opt = 1; break;
case 'd': q_d_opt = 1; break;
default: break;
}
}
break;
case 't': /* Was handled earlier. */
break;
case 'U': /* Print UTF-8 test and exit. */
dw_printf ("\n UTF-8 test string: ma%c%cana %c%c F%c%c%c%ce\n\n",
0xc3, 0xb1,
0xc2, 0xb0,
0xc3, 0xbc, 0xc3, 0x9f);
exit (0);
break;
case 'l': /* -l for log file directory name */
strlcpy (l_opt, optarg, sizeof(l_opt));
break;
case 'S': /* Print symbol tables and exit. */
symbols_init ();
symbols_list ();
exit (0);
break;
case 'E': /* -E Error rate (%) for corrupting frames. */
/* Just a number is transmit. Precede by R for receive. */
if (*optarg == 'r' || *optarg == 'R') {
E_rx_opt = atoi(optarg+1);
if (E_rx_opt < 1 || E_rx_opt > 99) {
text_color_set(DW_COLOR_ERROR);
dw_printf("-ER must be in range of 1 to 99.\n");
E_rx_opt = 10;
}
}
else {
E_tx_opt = atoi(optarg);
if (E_tx_opt < 1 || E_tx_opt > 99) {
text_color_set(DW_COLOR_ERROR);
dw_printf("-E must be in range of 1 to 99.\n");
E_tx_opt = 10;
}
}
break;
default:
/* Should not be here. */
text_color_set(DW_COLOR_DEBUG);
dw_printf("?? getopt returned character code 0%o ??\n", c);
usage (argv);
}
} /* end while(1) for options */
if (optind < argc)
{
if (optind < argc - 1)
{
text_color_set(DW_COLOR_ERROR);
dw_printf ("Warning: File(s) beyond the first are ignored.\n");
}
strlcpy (input_file, argv[optind], sizeof(input_file));
}
/*
* Get all types of configuration settings from configuration file.
*
* Possibly override some by command line options.
*/
#if USE_HAMLIB
rig_set_debug(d_h_opt);
#endif
symbols_init ();
config_init (config_file, &audio_config, &digi_config, &cdigi_config, &tt_config, &igate_config, &misc_config);
if (r_opt != 0) {
audio_config.adev[0].samples_per_sec = r_opt;
}
if (n_opt != 0) {
audio_config.adev[0].num_channels = n_opt;
if (n_opt == 2) {
audio_config.achan[1].valid = 1;
}
}
if (b_opt != 0) {
audio_config.adev[0].bits_per_sample = b_opt;
}
if (B_opt != 0) {
audio_config.achan[0].baud = B_opt;
/* We have similar logic in direwolf.c, config.c, gen_packets.c, and atest.c, */
/* that need to be kept in sync. Maybe it could be a common function someday. */
if (audio_config.achan[0].baud < 600) {
audio_config.achan[0].modem_type = MODEM_AFSK;
audio_config.achan[0].mark_freq = 1600; // Typical for HF SSB.
audio_config.achan[0].space_freq = 1800;
audio_config.achan[0].decimate = 3; // Reduce CPU load.
}
else if (audio_config.achan[0].baud < 1800) {
audio_config.achan[0].modem_type = MODEM_AFSK;
audio_config.achan[0].mark_freq = DEFAULT_MARK_FREQ;
audio_config.achan[0].space_freq = DEFAULT_SPACE_FREQ;
}
else if (audio_config.achan[0].baud < 3600) {
audio_config.achan[0].modem_type = MODEM_QPSK;
audio_config.achan[0].mark_freq = 0;
audio_config.achan[0].space_freq = 0;
if (audio_config.achan[0].baud != 2400) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Bit rate should be standard 2400 rather than specified %d.\n", audio_config.achan[0].baud);
}
}
else if (audio_config.achan[0].baud < 7200) {
audio_config.achan[0].modem_type = MODEM_8PSK;
audio_config.achan[0].mark_freq = 0;
audio_config.achan[0].space_freq = 0;
if (audio_config.achan[0].baud != 4800) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Bit rate should be standard 4800 rather than specified %d.\n", audio_config.achan[0].baud);
}
}
else {
audio_config.achan[0].modem_type = MODEM_SCRAMBLE;
audio_config.achan[0].mark_freq = 0;
audio_config.achan[0].space_freq = 0;
}
}
audio_config.statistics_interval = a_opt;
if (strlen(P_opt) > 0) {
/* -P for modem profile. */
/* TODO: Not yet documented. Should probably since it is consistent with atest. */
strlcpy (audio_config.achan[0].profiles, P_opt, sizeof(audio_config.achan[0].profiles));
}
if (D_opt != 0) {
// Reduce audio sampling rate to reduce CPU requirements.
audio_config.achan[0].decimate = D_opt;
}
// temp - only xmit errors.
audio_config.xmit_error_rate = E_tx_opt;
audio_config.recv_error_rate = E_rx_opt;
if (strlen(l_opt) > 0) {
strlcpy (misc_config.logdir, l_opt, sizeof(misc_config.logdir));
}
misc_config.enable_kiss_pt = enable_pseudo_terminal;
if (strlen(input_file) > 0) {
strlcpy (audio_config.adev[0].adevice_in, input_file, sizeof(audio_config.adev[0].adevice_in));
}
/*
* Open the audio source
* - soundcard
* - stdin
* - UDP
* Files not supported at this time.
* Can always "cat" the file and pipe it into stdin.
*/
err = audio_open (&audio_config);
if (err < 0) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Pointless to continue without audio device.\n");
SLEEP_SEC(5);
exit (1);
}
/*
* Initialize the demodulator(s) and HDLC decoder.
*/
multi_modem_init (&audio_config);
/*
* Initialize the touch tone decoder & APRStt gateway.
*/
dtmf_init (&audio_config, audio_amplitude);
aprs_tt_init (&tt_config);
tt_user_init (&audio_config, &tt_config);
/*
* Should there be an option for audio output level?
* Note: This is not the same as a volume control you would see on the screen.
* It is the range of the digital sound representation.
*/
gen_tone_init (&audio_config, audio_amplitude, 0);
morse_init (&audio_config, audio_amplitude);
assert (audio_config.adev[0].bits_per_sample == 8 || audio_config.adev[0].bits_per_sample == 16);
assert (audio_config.adev[0].num_channels == 1 || audio_config.adev[0].num_channels == 2);
assert (audio_config.adev[0].samples_per_sec >= MIN_SAMPLES_PER_SEC && audio_config.adev[0].samples_per_sec <= MAX_SAMPLES_PER_SEC);
/*
* Initialize the transmit queue.
*/
xmit_init (&audio_config, d_p_opt);
/*
* If -x option specified, transmit alternating tones for transmitter
* audio level adjustment, up to 1 minute then quit.
* TODO: enhance for more than one channel.
*/
if (xmit_calibrate_option) {
int max_duration = 60; /* seconds */
int n = audio_config.achan[0].baud * max_duration;
int chan = 0;
text_color_set(DW_COLOR_INFO);
dw_printf ("\nSending transmit calibration tones. Press control-C to terminate.\n");
ptt_set (OCTYPE_PTT, chan, 1);
while (n-- > 0) {
tone_gen_put_bit (chan, n & 1);
}
ptt_set (OCTYPE_PTT, chan, 0);
exit (0);
}
/*
* Initialize the digipeater and IGate functions.
*/
digipeater_init (&audio_config, &digi_config);
igate_init (&audio_config, &igate_config, &digi_config, d_i_opt);
cdigipeater_init (&audio_config, &cdigi_config);
pfilter_init (&igate_config, d_f_opt);
ax25_link_init (&misc_config);
/*
* Provide the AGW & KISS socket interfaces for use by a client application.
*/
server_init (&audio_config, &misc_config);
kissnet_init (&misc_config);
/*
* Create a pseudo terminal and KISS TNC emulator.
*/
kiss_init (&misc_config);
kiss_frame_init (&audio_config);
/*
* Open port for communication with GPS.
*/
dwgps_init (&misc_config, d_g_opt);
waypoint_init (&misc_config);
/*
* Enable beaconing.
* Open log file first because "-dttt" (along with -l...) will
* log the tracker beacon transmissions with fake channel 999.
*/
log_init(misc_config.logdir);
mheard_init (d_m_opt);
beacon_init (&audio_config, &misc_config, &igate_config);
/*
* Get sound samples and decode them.
* Use hot attribute for all functions called for every audio sample.
*/
recv_init (&audio_config);
recv_process ();
exit (EXIT_SUCCESS);
}
/*-------------------------------------------------------------------
*
* Name: app_process_rec_frame
*
* Purpose: This is called when we receive a frame with a valid
* FCS and acceptable size.
*
* Inputs: chan - Audio channel number, 0 or 1.
* subchan - Which modem caught it.
* Special case -1 for DTMF decoder.
* slice - Slicer which caught it.
* pp - Packet handle.
* alevel - Audio level, range of 0 - 100.
* (Special case, use negative to skip
* display of audio level line.
* Use -2 to indicate DTMF message.)
* retries - Level of bit correction used.
* spectrum - Display of how well multiple decoders did.
*
*
* Description: Print decoded packet.
* Optionally send to another application.
*
*--------------------------------------------------------------------*/
// TODO: Use only one printf per line so output doesn't get jumbled up with stuff from other threads.
void app_process_rec_packet (int chan, int subchan, int slice, packet_t pp, alevel_t alevel, retry_t retries, char *spectrum)
{
char stemp[500];
unsigned char *pinfo;
int info_len;
char heard[AX25_MAX_ADDR_LEN];
//int j;
int h;
char display_retries[32];
assert (chan >= 0 && chan < MAX_CHANS);
assert (subchan >= -1 && subchan < MAX_SUBCHANS);
assert (slice >= 0 && slice < MAX_SLICERS);
assert (pp != NULL); // 1.1J+
strlcpy (display_retries, "", sizeof(display_retries));
if (audio_config.achan[chan].fix_bits != RETRY_NONE || audio_config.achan[chan].passall) {
snprintf (display_retries, sizeof(display_retries), " [%s] ", retry_text[(int)retries]);
}
ax25_format_addrs (pp, stemp);
info_len = ax25_get_info (pp, &pinfo);
/* Print so we can see what is going on. */
/* Display audio input level. */
/* Who are we hearing? Original station or digipeater. */
if (ax25_get_num_addr(pp) == 0) {
/* Not AX.25. No station to display below. */
h = -1;
strlcpy (heard, "", sizeof(heard));
}
else {
h = ax25_get_heard(pp);
ax25_get_addr_with_ssid(pp, h, heard);
}
text_color_set(DW_COLOR_DEBUG);
dw_printf ("\n");
if (( ! q_h_opt ) && alevel.rec >= 0) { /* suppress if "-q h" option */
if (h != -1 && h != AX25_SOURCE) {
dw_printf ("Digipeater ");
}
char alevel_text[AX25_ALEVEL_TO_TEXT_SIZE];
ax25_alevel_to_text (alevel, alevel_text);
/* As suggested by KJ4ERJ, if we are receiving from */
/* WIDEn-0, it is quite likely (but not guaranteed), that */
/* we are actually hearing the preceding station in the path. */
if (h >= AX25_REPEATER_2 &&
strncmp(heard, "WIDE", 4) == 0 &&
isdigit(heard[4]) &&
heard[5] == '\0') {
char probably_really[AX25_MAX_ADDR_LEN];
ax25_get_addr_with_ssid(pp, h-1, probably_really);
dw_printf ("%s (probably %s) audio level = %s %s %s\n", heard, probably_really, alevel_text, display_retries, spectrum);
}
else if (strcmp(heard, "DTMF") == 0) {
dw_printf ("%s audio level = %s tt\n", heard, alevel_text);
}
else {
dw_printf ("%s audio level = %s %s %s\n", heard, alevel_text, display_retries, spectrum);
}
}
/* Version 1.2: Cranking the input level way up produces 199. */
/* Keeping it under 100 gives us plenty of headroom to avoid saturation. */
// TODO: suppress this message if not using soundcard input.
// i.e. we have no control over the situation when using SDR.
if (alevel.rec > 110) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Audio input level is too high. Reduce so most stations are around 50.\n");
}
// Display non-APRS packets in a different color.
// Display subchannel only when multiple modems configured for channel.
// -1 for APRStt DTMF decoder.
if (subchan == -1) {
text_color_set(DW_COLOR_REC);
dw_printf ("[%d.dtmf] ", chan);
}
else {
if (ax25_is_aprs(pp)) {
text_color_set(DW_COLOR_REC);
}
else {
text_color_set(DW_COLOR_DECODED);
}
if (audio_config.achan[chan].num_subchan > 1 && audio_config.achan[chan].num_slicers == 1) {
dw_printf ("[%d.%d] ", chan, subchan);
}
else if (audio_config.achan[chan].num_subchan == 1 && audio_config.achan[chan].num_slicers > 1) {
dw_printf ("[%d.%d] ", chan, slice);
}
else if (audio_config.achan[chan].num_subchan > 1 && audio_config.achan[chan].num_slicers > 1) {
dw_printf ("[%d.%d.%d] ", chan, subchan, slice);
}
else {
dw_printf ("[%d] ", chan);
}
}
dw_printf ("%s", stemp); /* stations followed by : */
/* Demystify non-APRS. Use same format for transmitted frames in xmit.c. */
if ( ! ax25_is_aprs(pp)) {
ax25_frame_type_t ftype;
cmdres_t cr;
char desc[80];
int pf;
int nr;
int ns;
ftype = ax25_frame_type (pp, &cr, desc, &pf, &nr, &ns);
/* Could change by 1, since earlier call, if we guess at modulo 128. */
info_len = ax25_get_info (pp, &pinfo);
dw_printf ("(%s)", desc);
if (ftype == frame_type_U_XID) {
struct xid_param_s param;
char info2text[100];
xid_parse (pinfo, info_len, &param, info2text, sizeof(info2text));
dw_printf (" %s\n", info2text);
}
else {
ax25_safe_print ((char *)pinfo, info_len, ( ! ax25_is_aprs(pp)) && ( ! d_u_opt) );
dw_printf ("\n");
}
}
else {
// for APRS we generally want to display non-ASCII to see UTF-8.
// for other, probably want to restrict to ASCII only because we are
// more likely to have compressed data than UTF-8 text.
// TODO: Might want to use d_u_opt for transmitted frames too.
ax25_safe_print ((char *)pinfo, info_len, ( ! ax25_is_aprs(pp)) && ( ! d_u_opt) );
dw_printf ("\n");
}
// Also display in pure ASCII if non-ASCII characters and "-d u" option specified.
if (d_u_opt) {
unsigned char *p;
int n = 0;
for (p = pinfo; *p != '\0'; p++) {
if (*p >= 0x80) n++;
}
if (n > 0) {
text_color_set(DW_COLOR_DEBUG);
ax25_safe_print ((char *)pinfo, info_len, 1);
dw_printf ("\n");
}
}
/* Optional hex dump of packet. */
if (d_p_opt) {
text_color_set(DW_COLOR_DEBUG);
dw_printf ("------\n");
ax25_hex_dump (pp);
dw_printf ("------\n");
}
/*
* Decode the contents of UI frames and display in human-readable form.
* Could be APRS or anything random for old fashioned packet beacons.
*
* Suppress printed decoding if "-q d" option used.
*/
if (ax25_is_aprs(pp)) {
decode_aprs_t A;
// we still want to decode it for logging and other processing.
// Just be quiet about errors if "-qd" is set.
decode_aprs (&A, pp, q_d_opt);
if ( ! q_d_opt ) {
// Print it all out in human readable format unless "-q d" option used.
decode_aprs_print (&A);
}
/*
* Perform validity check on each address.
* This should print an error message if any issues.
*/
(void)ax25_check_addresses(pp);
// Send to log file.
log_write (chan, &A, pp, alevel, retries);
// temp experiment.
//log_rr_bits (&A, pp);
// Add to list of stations heard over the radio.
mheard_save_rf (chan, &A, pp, alevel, retries);
// Convert to NMEA waypoint sentence if we have a location.
if (A.g_lat != G_UNKNOWN && A.g_lon != G_UNKNOWN) {
waypoint_send_sentence (strlen(A.g_name) > 0 ? A.g_name : A.g_src,
A.g_lat, A.g_lon, A.g_symbol_table, A.g_symbol_code,
DW_FEET_TO_METERS(A.g_altitude_ft), A.g_course, DW_MPH_TO_KNOTS(A.g_speed_mph),
A.g_comment);
}
}
/* Send to another application if connected. */
// TODO: Put a wrapper around this so we only call one function to send by all methods.
int flen;
unsigned char fbuf[AX25_MAX_PACKET_LEN];
flen = ax25_pack(pp, fbuf);
server_send_rec_packet (chan, pp, fbuf, flen);
kissnet_send_rec_packet (chan, fbuf, flen);
kiss_send_rec_packet (chan, fbuf, flen);
/*
* If it came from DTMF decoder, send it to APRStt gateway.
* Otherwise, it is a candidate for IGate and digipeater.
*
* TODO: It might be useful to have some way to simulate touch tone
* sequences with BEACON sendto=R... for testing.
*/
if (subchan == -1) {
if (tt_config.gateway_enabled && info_len >= 2) {
aprs_tt_sequence (chan, (char*)(pinfo+1));
}
}
else {
/* Send to Internet server if option is enabled. */
/* Consider only those with correct CRC. */
if (ax25_is_aprs(pp) && retries == RETRY_NONE) {
igate_send_rec_packet (chan, pp);
}
/* Send out a regenerated copy. Applies to all types, not just APRS. */
/* This was an experimental feature never documented in the User Guide. */
/* Initial feedback was positive but it fell by the wayside. */
/* Should follow up with testers and either document this or clean out the clutter. */
digi_regen (chan, pp);
/*
* APRS digipeater.
* Use only those with correct CRC; We don't want to spread corrupted data!
*/
if (ax25_is_aprs(pp) && retries == RETRY_NONE) {
digipeater (chan, pp);
}
/*
* Connected mode digipeater.
* Use only those with correct CRC.
*/
if (retries == RETRY_NONE) {
cdigipeater (chan, pp);
}
}
} /* end app_process_rec_packet */
/* Process control C and window close events. */
#if __WIN32__
static BOOL cleanup_win (int ctrltype)
{
if (ctrltype == CTRL_C_EVENT || ctrltype == CTRL_CLOSE_EVENT) {
text_color_set(DW_COLOR_INFO);
dw_printf ("\nQRT\n");
log_term ();
ptt_term ();
waypoint_term ();
dwgps_term ();
SLEEP_SEC(1);
ExitProcess (0);
}
return (TRUE);
}
#else
static void cleanup_linux (int x)
{
text_color_set(DW_COLOR_INFO);
dw_printf ("\nQRT\n");
log_term ();
ptt_term ();
dwgps_term ();
SLEEP_SEC(1);
exit(0);
}
#endif
static void usage (char **argv)
{
text_color_set(DW_COLOR_ERROR);
dw_printf ("\n");
dw_printf ("Dire Wolf version %d.%d\n", MAJOR_VERSION, MINOR_VERSION);
dw_printf ("\n");
dw_printf ("Usage: direwolf [options] [ - | stdin | UDP:nnnn ]\n");
dw_printf ("Options:\n");
dw_printf (" -c fname Configuration file name.\n");
dw_printf (" -l logdir Directory name for log files. Use . for current.\n");
dw_printf (" -r n Audio sample rate, per sec.\n");
dw_printf (" -n n Number of audio channels, 1 or 2.\n");
dw_printf (" -b n Bits per audio sample, 8 or 16.\n");
dw_printf (" -B n Data rate in bits/sec for channel 0. Standard values are 300, 1200, 2400, 4800, 9600.\n");
dw_printf (" 300 bps defaults to AFSK tones of 1600 & 1800.\n");
dw_printf (" 1200 bps uses AFSK tones of 1200 & 2200.\n");
dw_printf (" 2400 bps uses QPSK based on V.26 standard.\n");
dw_printf (" 4800 bps uses 8PSK based on V.27 standard.\n");
dw_printf (" 9600 bps and up uses K9NG/G3RUH standard.\n");
dw_printf (" -D n Divide audio sample rate by n for channel 0.\n");
dw_printf (" -d Debug options:\n");
dw_printf (" a a = AGWPE network protocol client.\n");
dw_printf (" k k = KISS serial port client.\n");
dw_printf (" n n = KISS network client.\n");
dw_printf (" u u = Display non-ASCII text in hexadecimal.\n");
dw_printf (" p p = dump Packets in hexadecimal.\n");
dw_printf (" g g = GPS interface.\n");
dw_printf (" w w = Waypoints for Position or Object Reports.\n");
dw_printf (" t t = Tracker beacon.\n");
dw_printf (" o o = output controls such as PTT and DCD.\n");
dw_printf (" i i = IGate.\n");
dw_printf (" m m = Monitor heard station list.\n");
#if USE_HAMLIB
dw_printf (" h h = hamlib increase verbose level.\n");
#endif
dw_printf (" -q Quiet (suppress output) options:\n");
dw_printf (" h h = Heard line with the audio level.\n");
dw_printf (" d d = Decoding of APRS packets.\n");
dw_printf (" -t n Text colors. 1=normal, 0=disabled.\n");
dw_printf (" -a n Audio statistics interval in seconds. 0 to disable.\n");
#if __WIN32__
#else
dw_printf (" -p Enable pseudo terminal for KISS protocol.\n");
#endif
dw_printf (" -x Send Xmit level calibration tones.\n");
dw_printf (" -U Print UTF-8 test string and exit.\n");
dw_printf (" -S Print symbol tables and exit.\n");
dw_printf ("\n");
dw_printf ("After any options, there can be a single command line argument for the source of\n");
dw_printf ("received audio. This can overrides the audio input specified in the configuration file.\n");
dw_printf ("\n");
#if __WIN32__
#else
dw_printf ("Complete documentation can be found in /usr/local/share/doc/direwolf.\n");
#endif
exit (EXIT_FAILURE);
}
/* end direwolf.c */
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