389 lines
8.6 KiB
C
389 lines
8.6 KiB
C
/* irmc - internet relay morsecode client */
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <errno.h>
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#include <string.h>
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#include <netdb.h>
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#include <sys/types.h>
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#include <netinet/in.h>
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#include <sys/socket.h>
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#include <sys/ioctl.h>
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#include <math.h>
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#include <fcntl.h>
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#include <pthread.h>
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#include <signal.h>
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#include <arpa/inet.h>
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#define MAXDATASIZE 1024 // max number of bytes we can get at once
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#include "cwprotocol.h"
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#include "beep.h"
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#include "util.h"
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// http://raspberrypiguide.de/howtos/raspberry-pi-gpio-how-to/
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#ifdef RASPI
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#include <wiringPi.h>
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#define TX_RASPI_PIN 5
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#endif
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int serial_status = 0, fd_serial, numbytes;
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double tx_timeout = 0;
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long tx_timer = 0;
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#define TX_WAIT 5000
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#define TX_TIMEOUT 240.0
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#define BEEP_FREQUENCY 1000.
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/* TX Methods */
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#define TX_NONE 0
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//#define TX_SERIAL 1
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#define TX_KEYBOARD 2 // not implemented yet
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#define TX_RASPI 3
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long key_press_t1;
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long key_release_t1;
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int last_message = 0;
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char last_sender[16];
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/* settings */
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int translate = 1;
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int audio_status = 1;
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// disconnect from the server
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void inthandler(int sig)
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{
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signal(sig, SIG_IGN);
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send(fd_socket, &disconnect_packet, SIZE_COMMAND_PACKET, 0);
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close(fd_socket);
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#ifdef TX_SERIAL
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close(fd_serial);
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#endif
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exit(1);
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}
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void txloop (void)
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{
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key_press_t1 = fastclock();
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tx_timeout = 0;
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for(;;){
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tx_data_packet.n++;
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tx_data_packet.code[tx_data_packet.n - 1] =
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(int) ((key_press_t1 - key_release_t1) * -1);
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#ifdef DEBUG
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printf("space: %i\n", tx_data_packet.code[tx_data_packet.n -1]);
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#endif
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#ifdef TX_SERIAL
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while(serial_status & TIOCM_DSR) ioctl(fd_serial, TIOCMGET, &serial_status);
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#endif
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#ifdef RASPI
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while(digitalRead(TX_RASPI_PIN)==1) { }
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#endif
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key_release_t1 = fastclock();
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tx_data_packet.n++;
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tx_data_packet.code[tx_data_packet.n - 1] =
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(int) ((key_release_t1 - key_press_t1) * 1);
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#ifdef DEBUG
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printf("mark: %i\n", tx_data_packet.code[tx_data_packet.n -1]);
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#endif
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while(1){
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#ifdef TX_SERIAL
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ioctl(fd_serial, TIOCMGET, &serial_status);
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if(serial_status & TIOCM_DSR) break;
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#endif
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#ifdef RASPI
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if(digitalRead(TX_RASPI_PIN)==1) break;
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#endif
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tx_timeout = fastclock() - key_release_t1;
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if(tx_timeout > TX_TIMEOUT) return;
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}
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key_press_t1 = fastclock();
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if(tx_data_packet.n == SIZE_CODE) {
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printf("irmc: warning packet is full.\n");
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return;
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}
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}
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}
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void message(int msg)
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{
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switch(msg){
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case 1:
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if(last_message == msg) return;
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if(last_message == 2) printf("\n");
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last_message = msg;
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printf("irmc: transmitting...\n");
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break;
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case 2:
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if(last_message == msg && strncmp(last_sender, rx_data_packet.id, 3) == 0) return;
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else {
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if(last_message == 2) printf("\n");
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last_message = msg;
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strncpy(last_sender, rx_data_packet.id, 3);
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printf("irmc: receiving...(%s)\n", rx_data_packet.id);
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}
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break;
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case 3:
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printf("irmc: circuit was latched by %s.\n", rx_data_packet.id);
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break;
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case 4:
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printf("irmc: circuit was unlatched by %s.\n", rx_data_packet.id);
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break;
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default:
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break;
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}
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fflush(0);
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}
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/* Main Loop */
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int main(int argc, char *argv[])
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{
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char buf[MAXDATASIZE];
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struct addrinfo hints, *servinfo, *p;
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int rv, i;
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char s[INET6_ADDRSTRLEN];
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int keepalive_t = 0;
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char hostname[64];
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char port[16];
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int channel;
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char id[SIZE_ID];
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char serialport[64];
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// Set default values
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snprintf(hostname, 64, "mtc-kob.dyndns.org");
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snprintf(port, 16, "7890");
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channel = 103;
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snprintf(id, SIZE_ID, "irmc-default");
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snprintf(serialport, 64, "");
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// Read commandline
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opterr = 0;
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int c;
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while ((c = getopt (argc, argv, "h:p:c:i:s:")) != -1)
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{
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switch (c)
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{
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case 'h':
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snprintf(hostname, 64, "%s", optarg);
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break;
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case 'p':
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snprintf(port, 16, "%s", optarg);
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break;
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case 'c':
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channel = atoi (optarg);
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break;
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case 'i':
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snprintf(id, SIZE_ID, "%s", optarg);
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break;
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case 's':
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snprintf(serialport, 64, "%s", optarg);
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break;
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case '?':
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fprintf(stderr, "irmc - Internet Relay Morse Code\n\n");
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fprintf(stderr, "usage: irmc [arguments]\n\n");
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fprintf(stderr, "Arguments:\n\n");
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fprintf(stderr, " -h [hostname] Hostname of morsekob server. Default: %s\n", hostname);
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fprintf(stderr, " -p [port] Port of morsekob server. Default: %s\n", port);
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fprintf(stderr, " -c [channel] Channel. Default: %d\n", channel);
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fprintf(stderr, " -i [id] My ID. Default: %s\n", id);
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fprintf(stderr, " -s [serialport] Serial port device name. Example: /dev/tty.usbserial Default: \"%s\"\n", serialport);
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return 1;
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default:
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abort ();
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}
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}
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// Preparing connection
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fprintf(stderr, "irmc - Internet Relay Morse Code\n\n");
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fprintf(stderr, "Connecting to %s:%s on channel %d with ID %s.\n", hostname, port, channel, id);
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prepare_id (&id_packet, id);
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prepare_tx (&tx_data_packet, id);
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connect_packet.channel = channel;
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signal(SIGINT, inthandler);
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memset(&hints, 0, sizeof hints);
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hints.ai_family = AF_UNSPEC; /* ipv4 or ipv6 */
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hints.ai_socktype = SOCK_DGRAM;
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if ((rv = getaddrinfo(hostname, port, &hints, &servinfo)) != 0) {
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fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(rv));
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return 1;
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}
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/* Find the first free socket */
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for(p = servinfo; p != NULL; p = p->ai_next) {
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if ((fd_socket = socket(p->ai_family, p->ai_socktype,
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p->ai_protocol)) == -1) {
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perror("irmc: socket");
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continue;
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}
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if (connect(fd_socket, p->ai_addr, p->ai_addrlen) == -1) {
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close(fd_socket);
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perror("irmc: connect");
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continue;
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}
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break;
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}
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fcntl(fd_socket, F_SETFL, O_NONBLOCK);
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if (p == NULL) {
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fprintf(stderr, "Failed to connect.\n");
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return 2;
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}
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inet_ntop(p->ai_family, get_in_addr((struct sockaddr *)p->ai_addr),
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s, sizeof s);
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fprintf(stderr, "Connected to %s.\n", s);
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#ifdef TX_SERIAL
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fd_serial = open(serialport, O_RDWR | O_NOCTTY | O_NDELAY);
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if(fd_serial == -1) {
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fprintf(stderr,"Unable to open serial port %s.\n", serialport);
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}
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#endif
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#ifdef RASPI
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if (wiringPiSetup() == -1)
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{
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fprintf(stderr,"Unable to setup wiringPi for PIN %d\n", TX_RASPI_PIN);
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exit (1);
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}
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pinMode(TX_RASPI_PIN, INPUT);
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#endif
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#ifdef TX_KEYBOARD
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prepare_text2morse (WPM_DEFAULT);
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#endif
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freeaddrinfo(servinfo); /* all done with this structure */
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key_release_t1 = fastclock();
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identifyclient();
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beep_init();
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/* Main Loop */
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for(;;) {
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if(tx_timer == 0)
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if((numbytes = recv(fd_socket, buf, MAXDATASIZE-1, 0)) == -1)
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usleep(250);
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if(numbytes == SIZE_DATA_PACKET && tx_timer == 0){
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memcpy(&rx_data_packet, buf, SIZE_DATA_PACKET);
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#if DEBUG
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printf("length: %i\n", rx_data_packet.length);
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printf("id: %s\n", rx_data_packet.id);
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printf("sequence no.: %i\n", rx_data_packet.sequence);
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printf("version: %s\n", rx_data_packet.status);
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printf("n: %i\n", rx_data_packet.n);
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printf("code:\n");
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for(i = 0; i < SIZE_CODE; i++)printf("%i ", rx_data_packet.code[i]); printf("\n");
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#endif
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if(rx_data_packet.n > 0 && rx_sequence != rx_data_packet.sequence){
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message(2);
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if(translate == 1){
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printf("%s", rx_data_packet.status);
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fflush(0);
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}
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rx_sequence = rx_data_packet.sequence;
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for(i = 0; i < rx_data_packet.n; i++){
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switch(rx_data_packet.code[i]){
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case 1:
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message(3);
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break;
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case 2:
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message(4);
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break;
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default:
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if(audio_status == 1)
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{
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int length = rx_data_packet.code[i];
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if(length == 0 || abs(length) > 2000) {
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}
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else
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{
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if(length < 0) {
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beep(0.0, abs(length)/1000.);
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}
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else
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{
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beep(BEEP_FREQUENCY, length/1000.);
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}
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}
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}
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break;
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}
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}
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}
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}
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if(tx_timer > 0) tx_timer--;
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if(tx_data_packet.n > 1 ){
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tx_sequence++;
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tx_data_packet.sequence = tx_sequence;
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for(i = 0; i < TX_RETRIES; i++)
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send(fd_socket, &tx_data_packet, SIZE_DATA_PACKET, 0);
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#if DEBUG
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printf("irmc: sent data packet.\n");
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#endif
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tx_data_packet.n = 0;
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}
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#ifdef TX_SERIAL
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ioctl(fd_serial,TIOCMGET, &serial_status);
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if(serial_status & TIOCM_DSR){
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txloop();
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tx_timer = TX_WAIT;
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message(1);
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}
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#endif
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#ifdef RASPI
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if(digitalRead(TX_RASPI_PIN)==1){
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txloop();
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tx_timer = TX_WAIT;
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message(1);
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}
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#endif
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if(keepalive_t < 0 && tx_timer == 0){
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#if DEBUG
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printf("keep alive sent.\n");
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#endif
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identifyclient();
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keepalive_t = KEEPALIVE_CYCLE;
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}
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if(tx_timer == 0) {
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keepalive_t--;
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usleep(50);
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}
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#ifdef TX_KEYBOARD
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if(kbhit() && tx_timer == 0){
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char2morse(0);
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}
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#endif
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} /* End of mainloop */
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send(fd_socket, &disconnect_packet, SIZE_COMMAND_PACKET, 0);
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close(fd_socket);
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#ifdef TX_SERIAL
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close(fd_serial);
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#endif
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buzzer_stop();
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exit(0);
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}
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