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irmc/src/irmc.c

383 lines
8.5 KiB

/* irmc - internet relay morsecode client */
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <netdb.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <math.h>
#include <fcntl.h>
#include <pthread.h>
#include <signal.h>
#include <arpa/inet.h>
#define MAXDATASIZE 1024 // max number of bytes we can get at once
#include "cwprotocol.h"
#include "beep.h"
#include "util.h"
// http://raspberrypiguide.de/howtos/raspberry-pi-gpio-how-to/
#ifdef RASPI
#include <wiringPi.h>
#define TX_RASPI_PIN 5
#endif
int serial_status = 0, fd_serial, numbytes;
double tx_timeout = 0;
long tx_timer = 0;
#define TX_WAIT 5000
#define TX_TIMEOUT 240.0
#define KEEPALIVE_CYCLE 100
/* TX Methods */
#define TX_NONE 0
//#define TX_SERIAL 1
//#define TX_KEYBOARD 2 // not implemented yet
#define TX_RASPI 3
long key_press_t1;
long key_release_t1;
int last_message = 0;
char last_sender[16];
/* settings */
int translate = 1;
int audio_status = 1;
// disconnect from the server
void inthandler(int sig)
{
signal(sig, SIG_IGN);
send(fd_socket, &disconnect_packet, SIZE_COMMAND_PACKET, 0);
close(fd_socket);
#ifdef TX_SERIAL
close(fd_serial);
#endif
exit(1);
}
void txloop (void)
{
key_press_t1 = fastclock();
tx_timeout = 0;
for(;;){
tx_data_packet.n++;
tx_data_packet.code[tx_data_packet.n - 1] =
(int) ((key_press_t1 - key_release_t1) * -1);
#ifdef DEBUG
printf("space: %i\n", tx_data_packet.code[tx_data_packet.n -1]);
#endif
#ifdef TX_SERIAL
while(serial_status & TIOCM_DSR) ioctl(fd_serial, TIOCMGET, &serial_status);
#endif
#ifdef RASPI
while(digitalRead(TX_RASPI_PIN)==1) { }
#endif
key_release_t1 = fastclock();
tx_data_packet.n++;
tx_data_packet.code[tx_data_packet.n - 1] =
(int) ((key_release_t1 - key_press_t1) * 1);
#ifdef DEBUG
printf("mark: %i\n", tx_data_packet.code[tx_data_packet.n -1]);
#endif
while(1){
#ifdef TX_SERIAL
ioctl(fd_serial, TIOCMGET, &serial_status);
if(serial_status & TIOCM_DSR) break;
#endif
#ifdef RASPI
if(digitalRead(TX_RASPI_PIN)==1) break;
#endif
tx_timeout = fastclock() - key_release_t1;
if(tx_timeout > TX_TIMEOUT) return;
}
key_press_t1 = fastclock();
if(tx_data_packet.n == SIZE_CODE) {
printf("irmc: warning packet is full.\n");
return;
}
}
}
void message(int msg)
{
switch(msg){
case 1:
if(last_message == msg) return;
if(last_message == 2) printf("\n");
last_message = msg;
printf("irmc: transmitting...\n");
break;
case 2:
if(last_message == msg && strncmp(last_sender, rx_data_packet.id, 3) == 0) return;
else {
if(last_message == 2) printf("\n");
last_message = msg;
strncpy(last_sender, rx_data_packet.id, 3);
printf("irmc: receiving...(%s)\n", rx_data_packet.id);
}
break;
case 3:
printf("irmc: circuit was latched by %s.\n", rx_data_packet.id);
break;
case 4:
printf("irmc: circuit was unlatched by %s.\n", rx_data_packet.id);
break;
default:
break;
}
fflush(0);
}
/* Main Loop */
int main(int argc, char *argv[])
{
char buf[MAXDATASIZE];
struct addrinfo hints, *servinfo, *p;
int rv, i;
char s[INET6_ADDRSTRLEN];
int keepalive_t = 0;
char hostname[64];
char port[16];
int channel;
char id[SIZE_ID];
char serialport[64];
// Set default values
snprintf(hostname, 64, "mtc-kob.dyndns.org");
snprintf(port, 16, "7890");
channel = 103;
snprintf(id, SIZE_ID, "irmc-default");
snprintf(serialport, 64, "");
// Read commandline
opterr = 0;
int c;
while ((c = getopt (argc, argv, "h:p:c:i:s:")) != -1)
{
switch (c)
{
case 'h':
snprintf(hostname, 64, "%s", optarg);
break;
case 'p':
snprintf(port, 16, "%s", optarg);
break;
case 'c':
channel = atoi (optarg);
break;
case 'i':
snprintf(id, SIZE_ID, "%s", optarg);
break;
case 's':
snprintf(serialport, 64, "%s", optarg);
break;
case '?':
fprintf(stderr, "irmc - Internet Relay Morse Code\n\n");
fprintf(stderr, "usage: irmc [arguments]\n\n");
fprintf(stderr, "Arguments:\n\n");
fprintf(stderr, " -h [hostname] Hostname of morsekob server. Default: %s\n", hostname);
fprintf(stderr, " -p [port] Port of morsekob server. Default: %s\n", port);
fprintf(stderr, " -c [channel] Channel. Default: %d\n", channel);
fprintf(stderr, " -i [id] My ID. Default: %s\n", id);
fprintf(stderr, " -s [serialport] Serial port device name. Example: /dev/tty.usbserial Default: \"%s\"\n", serialport);
return 1;
default:
abort ();
}
}
// Preparing connection
fprintf(stderr, "irmc - Internet Relay Morse Code\n\n");
fprintf(stderr, "Connecting to %s:%s on channel %d with ID %s.\n", hostname, port, channel, id);
prepare_id (&id_packet, id);
prepare_tx (&tx_data_packet, id);
connect_packet.channel = channel;
signal(SIGINT, inthandler);
memset(&hints, 0, sizeof hints);
hints.ai_family = AF_UNSPEC; /* ipv4 or ipv6 */
hints.ai_socktype = SOCK_DGRAM;
if ((rv = getaddrinfo(hostname, port, &hints, &servinfo)) != 0) {
fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(rv));
return 1;
}
/* Find the first free socket */
for(p = servinfo; p != NULL; p = p->ai_next) {
if ((fd_socket = socket(p->ai_family, p->ai_socktype,
p->ai_protocol)) == -1) {
perror("irmc: socket");
continue;
}
if (connect(fd_socket, p->ai_addr, p->ai_addrlen) == -1) {
close(fd_socket);
perror("irmc: connect");
continue;
}
break;
}
fcntl(fd_socket, F_SETFL, O_NONBLOCK);
if (p == NULL) {
fprintf(stderr, "Failed to connect.\n");
return 2;
}
inet_ntop(p->ai_family, get_in_addr((struct sockaddr *)p->ai_addr),
s, sizeof s);
fprintf(stderr, "Connected to %s.\n", s);
#ifdef TX_SERIAL
fd_serial = open(serialport, O_RDWR | O_NOCTTY | O_NDELAY);
if(fd_serial == -1) {
fprintf(stderr,"Unable to open serial port %s.\n", serialport);
}
#endif
#ifdef RASPI
if (wiringPiSetup() == -1)
{
fprintf(stderr,"Unable to setup wiringPi for PIN %d\n", TX_RASPI_PIN);
exit (1);
}
pinMode(TX_RASPI_PIN, INPUT);
#endif
freeaddrinfo(servinfo); /* all done with this structure */
key_release_t1 = fastclock();
identifyclient();
beep_init();
/* Main Loop */
for(;;) {
if(tx_timer == 0)
if((numbytes = recv(fd_socket, buf, MAXDATASIZE-1, 0)) == -1)
usleep(250);
if(numbytes == SIZE_DATA_PACKET && tx_timer == 0){
memcpy(&rx_data_packet, buf, SIZE_DATA_PACKET);
#if DEBUG
printf("length: %i\n", rx_data_packet.length);
printf("id: %s\n", rx_data_packet.id);
printf("sequence no.: %i\n", rx_data_packet.sequence);
printf("version: %s\n", rx_data_packet.status);
printf("n: %i\n", rx_data_packet.n);
printf("code:\n");
for(i = 0; i < SIZE_CODE; i++)printf("%i ", rx_data_packet.code[i]); printf("\n");
#endif
if(rx_data_packet.n > 0 && rx_sequence != rx_data_packet.sequence){
message(2);
if(translate == 1){
printf("%s", rx_data_packet.status);
fflush(0);
}
rx_sequence = rx_data_packet.sequence;
for(i = 0; i < rx_data_packet.n; i++){
switch(rx_data_packet.code[i]){
case 1:
message(3);
break;
case 2:
message(4);
break;
default:
if(audio_status == 1)
{
int length = rx_data_packet.code[i];
if(length == 0 || abs(length) > 2000) {
}
else
{
if(length < 0) {
beep(0.0, abs(length)/1000.);
}
else
{
beep(1000.0, length/1000.);
}
}
}
break;
}
}
}
}
if(tx_timer > 0) tx_timer--;
if(tx_data_packet.n > 1 ){
tx_sequence++;
tx_data_packet.sequence = tx_sequence;
for(i = 0; i < 5; i++) send(fd_socket, &tx_data_packet, SIZE_DATA_PACKET, 0);
#if DEBUG
printf("irmc: sent data packet.\n");
#endif
tx_data_packet.n = 0;
}
#ifdef TX_SERIAL
ioctl(fd_serial,TIOCMGET, &serial_status);
if(serial_status & TIOCM_DSR){
txloop();
tx_timer = TX_WAIT;
message(1);
}
#endif
#ifdef RASPI
if(digitalRead(5)==1){
txloop();
tx_timer = TX_WAIT;
message(1);
}
#endif
if(keepalive_t < 0 && tx_timer == 0){
#if DEBUG
printf("keep alive sent.\n");
#endif
identifyclient();
keepalive_t = KEEPALIVE_CYCLE;
}
if(tx_timer == 0) {
keepalive_t--;
usleep(50);
}
if(kbhit() && tx_timer == 0){
getchar(); /* flush the buffer */
}
} /* End of mainloop */
send(fd_socket, &disconnect_packet, SIZE_COMMAND_PACKET, 0);
close(fd_socket);
#ifdef TX_SERIAL
close(fd_serial);
#endif
buzzer_stop();
exit(0);
}