mirror of
https://github.com/brmlab/acarsdec.git
synced 2025-08-01 21:53:38 +02:00
303 lines
7.4 KiB
C
303 lines
7.4 KiB
C
/*
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* Copyright (c) 2007 by Thierry Leconte (F4DWV)
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*
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* $Id: serv.c,v 1.2 2007/04/22 16:14:41 f4dwv Exp $
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*
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* This code is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Library General Public License version 2
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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#include <stdlib.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <errno.h>
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#include "acarsdec.h"
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static int sa, sc;
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int init_serv(short port)
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{
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struct sockaddr_in locaddr, remaddr;
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socklen_t len;
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char c;
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int res;
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sa = socket(PF_INET, SOCK_STREAM, 0);
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if (sa < 0) {
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fprintf(stderr, "socket : %s\n", strerror(errno));
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return -1;
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}
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memset(&locaddr, 0, sizeof(locaddr));
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locaddr.sin_family = AF_INET;
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locaddr.sin_port = htons(port);
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locaddr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
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len = sizeof(locaddr);
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res = bind(sa, (struct sockaddr *) &locaddr, len);
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if (res) {
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fprintf(stderr, "bind : %s\n", strerror(errno));
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return -1;
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}
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res = listen(sa, 1);
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if (res) {
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fprintf(stderr, "listen : %s\n", strerror(errno));
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return -1;
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}
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memset(&remaddr, 0, sizeof(remaddr));
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len = sizeof(remaddr);
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sc = accept(sa, (struct sockaddr *) &remaddr, &len);
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if (sc < 0) {
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fprintf(stderr, "accept : %s\n", strerror(errno));
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return -1;
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}
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do {
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res = read(sc, &c, 1);
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} while (res == 1 && c != '\n');
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return 0;
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}
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/* convert ACARS position reports to APRS position */
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static void toaprs(int la, char lac, int ln, char lnc, int prec, char *out)
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{
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int lad, lnd;
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float lam, lnm;
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lad = la / 10000;
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lnd = ln / 10000;
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lam = (float) (la - (lad * 10000)) * 60.0 / 10000.0;
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lnm = (float) (ln - (lnd * 10000)) * 60.0 / 10000.0;
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switch (prec) {
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case 0:
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sprintf(out, "%02d%02.0f. %c/%03d%02.0f. %c^", lad, lam, lac, lnd, lnm, lnc);
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break;
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case 1:
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sprintf(out, "%02d%04.1f %c/%03d%04.1f %c^", lad, lam, lac, lnd, lnm, lnc);
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break;
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case 2:
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default:
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sprintf(out, "%02d%05.2f%c/%03d%05.2f%c^", lad, lam, lac, lnd, lnm, lnc);
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break;
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}
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}
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int posconv(char *txt, unsigned char *label, char *pos)
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{
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char lac, lnc;
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int la, ln;
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char las[7], lns[7];
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int n;
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char *p;
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/*try different heuristics */
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n = sscanf(txt, "#M1BPOS%c%05d%c%063d,", &lac, &la, &lnc, &ln);
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if (n == 4 && (lac == 'N' || lac == 'S') && (lnc == 'E' || lnc == 'W')) {
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la *= 10;
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ln *= 10;
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toaprs(la, lac, ln, lnc, 1, pos);
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return 0;;
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}
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n = sscanf(txt, "#M1AAEP%c%06d%c%07d", &lac, &la, &lnc, &ln);
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if (n == 4 && (lac == 'N' || lac == 'S') && (lnc == 'E' || lnc == 'W')) {
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toaprs(la, lac, ln, lnc, 2, pos);
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return 0;;
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}
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if (strncmp(txt, "#M1B", 4) == 0) {
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if ((p = strstr(txt, "/FPO")) != NULL) {
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n = sscanf(p, "/FPO%c%05d%c%06d", &lac, &la, &lnc, &ln);
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if (n == 4 && (lac == 'N' || lac == 'S')
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&& (lnc == 'E' || lnc == 'W')) {
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la *= 10;
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ln *= 10;
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toaprs(la, lac, ln, lnc, 1, pos);
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return 0;;
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}
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}
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if ((p = strstr(txt, "/PS")) != NULL) {
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n = sscanf(p, "/PS%c%05d%c%06d", &lac, &la, &lnc, &ln);
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if (n == 4 && (lac == 'N' || lac == 'S')
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&& (lnc == 'E' || lnc == 'W')) {
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la *= 10;
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ln *= 10;
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toaprs(la, lac, ln, lnc, 1, pos);
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return 0;;
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}
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}
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}
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n = sscanf(txt, "FST01%*8s%c%06d%c%07d", &lac, &la, &lnc, &ln);
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if (n == 4 && (lac == 'N' || lac == 'S') && (lnc == 'E' || lnc == 'W')) {
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toaprs(la, lac, ln, lnc, 2, pos);
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return 0;;
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}
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n = sscanf(txt, "(2%c%5c%c%6c", &lac, las, &lnc, lns);
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if (n == 4 && (lac == 'N' || lac == 'S') && (lnc == 'E' || lnc == 'W')) {
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las[5] = 0;
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lns[6] = 0;
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la = 10 * atoi(las);
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ln = 10 * atoi(lns);
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toaprs(la, lac, ln, lnc, 1, pos);
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return 0;;
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}
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n = sscanf(txt, "(:2%c%5c%c%6c", &lac, las, &lnc, lns);
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if (n == 4 && (lac == 'N' || lac == 'S') && (lnc == 'E' || lnc == 'W')) {
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las[5] = 0;
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lns[6] = 0;
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la = 10 * atoi(las);
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ln = 10 * atoi(lns);
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toaprs(la, lac, ln, lnc, 1, pos);
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return 0;;
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}
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n = sscanf(txt, "(2%*4s%c%5c%c%6c", &lac, las, &lnc, lns);
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if (n == 4 && (lac == 'N' || lac == 'S') && (lnc == 'E' || lnc == 'W')) {
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las[5] = 0;
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lns[6] = 0;
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la = 10 * atoi(las);
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ln = 10 * atoi(lns);
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toaprs(la, lac, ln, lnc, 1, pos);
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return 0;;
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}
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n = sscanf(txt, "LAT %c%3c.%3c/LON %c%3c.%3c", &lac, las, &(las[3]),
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&lnc, lns, &(lns[3]));
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if (n == 6 && (lac == 'N' || lac == 'S') && (lnc == 'E' || lnc == 'W')) {
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las[6] = 0;
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lns[6] = 0;
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la = 10 * atoi(las);
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ln = 10 * atoi(lns);
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toaprs(la, lac, ln, lnc, 1, pos);
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return 0;;
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}
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n = sscanf(txt, "#DFB(POS-%*6s-%04d%c%05d%c/", &la, &lac, &ln, &lnc);
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if (n == 4 && (lac == 'N' || lac == 'S') && (lnc == 'E' || lnc == 'W')) {
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la *= 100;
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ln *= 100;
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toaprs(la, lac, ln, lnc, 0, pos);
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return 0;;
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}
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n = sscanf(txt, "#DFB*POS\a%*8s%c%04d%c%05d/", &lac, &la, &lnc, &ln);
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if (n == 4 && (lac == 'N' || lac == 'S') && (lnc == 'E' || lnc == 'W')) {
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la *= 100;
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ln *= 100;
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toaprs(la, lac, ln, lnc, 0, pos);
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return 0;;
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}
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n = sscanf(txt, "POS%c%05d%c%06d,", &lac, &la, &lnc, &ln);
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if (n == 4 && (lac == 'N' || lac == 'S') && (lnc == 'E' || lnc == 'W')) {
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la *= 10;
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ln *= 10;
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toaprs(la, lac, ln, lnc, 1, pos);
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return 0;;
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}
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n = sscanf(txt, "POS%*2s,%c%05d%c%06d,", &lac, &la, &lnc, &ln);
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if (n == 4 && (lac == 'N' || lac == 'S') && (lnc == 'E' || lnc == 'W')) {
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la *= 10;
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ln *= 10;
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toaprs(la, lac, ln, lnc, 1, pos);
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return 0;;
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}
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n = sscanf(txt, "RCL%*2s,%c%05d%c%06d,", &lac, &la, &lnc, &ln);
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if (n == 4 && (lac == 'N' || lac == 'S') && (lnc == 'E' || lnc == 'W')) {
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la *= 10;
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ln *= 10;
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toaprs(la, lac, ln, lnc, 1, pos);
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return 0;;
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}
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n = sscanf(txt, "TWX%*2s,%c%05d%c%06d,", &lac, &la, &lnc, &ln);
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if (n == 4 && (lac == 'N' || lac == 'S') && (lnc == 'E' || lnc == 'W')) {
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la *= 10;
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ln *= 10;
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toaprs(la, lac, ln, lnc, 1, pos);
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return 0;;
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}
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n = sscanf(txt, "CLA%*2s,%c%05d%c%06d,", &lac, &la, &lnc, &ln);
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if (n == 4 && (lac == 'N' || lac == 'S') && (lnc == 'E' || lnc == 'W')) {
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la *= 10;
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ln *= 10;
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toaprs(la, lac, ln, lnc, 1, pos);
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return 0;;
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}
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n = sscanf(txt, "%c%05d/%c%06d,", &lac, &la, &lnc, &ln);
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if (n == 4 && (lac == 'N' || lac == 'S') && (lnc == 'E' || lnc == 'W')) {
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la *= 10;
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ln *= 10;
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toaprs(la, lac, ln, lnc, 1, pos);
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return 0;;
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}
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return 1;
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}
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int send_mesg(msg_t * msg)
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{
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char apstr[512];
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char txt[512];
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char pos[64];
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unsigned char *ind;
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if(msg->label[0]=='_' && msg->label[1]==0x7f)
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return 0;
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strcpy(txt,msg->txt);
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for(ind = txt;*ind != 0 ;ind++) {
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if(*ind==0x0a || *ind == 0x0d) *ind=' ';
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}
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ind = msg->addr;
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while (*ind == '.' && *ind != 0)
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ind++;
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if (posconv(msg->txt, msg->label, pos))
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sprintf(apstr, "%s>ACARS:>Fid:%s Lbl:%s %s\n", ind, msg->fid,msg->label,txt);
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else
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sprintf(apstr, "%s>ACARS:!%sFid:%s Lbl:%s %s\n", ind, pos,msg->fid,msg->label,txt);
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write(sc, apstr, strlen(apstr));
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return 0;
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}
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void end_serv(void)
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{
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close(sc);
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close(sa);
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}
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