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/*
* libpri: An implementation of Primary Rate ISDN
*
* Written by Mark Spencer <markster@digium.com>
*
* Copyright (C) 2001-2005, Digium
* 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>
#include <zaptel/zaptel.h>
#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(struct pri *pri, char *buf, int len, int txrx)
{
q921_h *h = (q921_h *)buf;
q921_dump(pri, h, len, 1, txrx);
if (!((h->h.data[0] & Q921_FRAMETYPE_MASK) & 0x3)) {
q931_dump(pri, (q931_h *)(h->i.data), len - 4 - 2 /* FCS */, 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((struct pri *)NULL, 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((struct pri *)NULL, buf, res, 0);
res = write(d1, buf, res);
}
}
}
static void my_pri_message(struct pri *pri, char *stuff)
{
fprintf(stdout, "%s", stuff);
}
static void my_pri_error(struct pri *pri, char *stuff)
{
fprintf(stderr, "%s", stuff);
}
int main(int argc, char *argv[])
{
int d1, d2;
if (argc < 3) {
fprintf(stderr, "Usage: pridump <dev1> <dev2>\n");
exit(1);
}
pri_set_message(my_pri_message);
pri_set_error(my_pri_error);
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;
}
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