/* * libpri: An implementation of Primary Rate ISDN * * Written by Mark Spencer <markster@linux-support.net> * * Copyright (C) 2001, Linux Support Services, Inc. * All Rights Reserved. * * 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, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  * *//* * This program tests libpri call reception using a zaptel interface. * Its state machines are setup for RECEIVING CALLS ONLY, so if you * are trying to both place and receive calls you have to a bit more. */#include <stdio.h>#include <unistd.h>#include <stdlib.h>#include <fcntl.h>#include <errno.h>#include <string.h>#include <sys/ioctl.h>#include <sys/select.h>#include <sys/types.h>#if defined(__linux__)#include <linux/zaptel.h>#elif defined(__FreeBSD__)#include <zaptel.h>#endif#include "libpri.h"#include "pri_q921.h"#include "pri_q931.h"static int pri_open(char *dev){	int dfd;	struct zt_params p;		dfd = open(dev, O_RDWR);	if (dfd < 0) {		fprintf(stderr, "Failed to open dchannel '%s': %s\n", dev, strerror(errno));		return -1;	}	if (ioctl(dfd, ZT_GET_PARAMS, &p)) {		fprintf(stderr, "Unable to get parameters on '%s': %s\n", dev, strerror(errno));		return -1;	}	if ((p.sigtype != ZT_SIG_HDLCRAW) && (p.sigtype != ZT_SIG_HDLCFCS)) {		fprintf(stderr, "%s is in %d signalling, not FCS HDLC or RAW HDLC mode\n", dev, p.sigtype);		return -1;	}	return dfd;}static void dump_packet(char *buf, int len, int txrx){	q921_h *h = (q921_h *)buf;	q921_dump(h, len, 1, txrx);	if (!((h->h.data[0] & Q921_FRAMETYPE_MASK) & 0x3)) {		q931_dump((q931_h *)(h->i.data), len - 4, txrx);	}	fflush(stdout);	fflush(stderr);}static int pri_bridge(int d1, int d2){	char buf[1024];	fd_set fds;	int max;	int e;	int res;	for(;;) {		FD_ZERO(&fds);		FD_SET(d1, &fds);		FD_SET(d2, &fds);		max = d1;		if (max < d2)			max = d2;		ioctl(d1, ZT_GETEVENT, &e);		ioctl(d2, ZT_GETEVENT, &e);		res = select(max + 1, &fds, NULL, NULL, NULL);		if (res < 0) {			fprintf(stderr, "Select returned %d: %s\n", res, strerror(errno));			continue;		};		if (FD_ISSET(d1, &fds)) {			/* Copy from d1 to d2 */			res = read(d1, buf, sizeof(buf));			dump_packet(buf, res, 1);			res = write(d2, buf, res);		}		if (FD_ISSET(d2, &fds)) {			/* Copy from d2 to d1 */			res = read(d2, buf, sizeof(buf));			dump_packet(buf, res, 0);			res = write(d1, buf, res);		}	}}int main(int argc, char *argv[]){	int d1, d2;		if (argc < 3) {		fprintf(stderr, "Usage: pridump <dev1> <dev2>\n");		exit(1);	}		d1 = pri_open(argv[1]);	if (d1 < 0)		exit(1);	d2 = pri_open(argv[2]);	if (d2 < 0)		exit(1);	pri_bridge(d1, d2);	return 0;}