linuxptp/linuxptp.c

163 lines
3.9 KiB
C

/**
* @file
* @note Copyright (C) 2011 Richard Cochran <richardcochran@gmail.com>
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "clock.h"
#include "print.h"
#include "transport.h"
#include "udp.h"
#define DEFAULT_PHC "/dev/ptp0"
static int running = 1;
static struct defaultDS ds;
static int generate_clock_identity(struct ClockIdentity *ci, char *name)
{
unsigned char mac[6];
if (udp_interface_macaddr(name, mac, sizeof(mac)))
return -1;
ci->id[0] = mac[0];
ci->id[1] = mac[1];
ci->id[2] = mac[2];
ci->id[3] = 0xFF;
ci->id[4] = 0xFE;
ci->id[5] = mac[3];
ci->id[6] = mac[4];
ci->id[7] = mac[5];
return 0;
}
static void usage(char *progname)
{
fprintf(stderr,
"\nusage: %s [options]\n\n"
" Network Transport\n\n"
" -2 IEEE 802.3\n"
" -4 UDP IPV4 (default)\n"
" -6 UDP IPV6\n\n"
" Time Stamping\n\n"
" -r HARDWARE (default)\n"
" -s SOFTWARE\n"
" -z LEGACY HW\n\n"
" Other Options\n\n"
" -h prints this message and exits\n"
" -i [dev] interface device to use, for example 'eth0'\n"
" (may be specified multiple times)\n"
" -p [dev] PTP hardware clock device to use, default '%s'\n"
" (ignored for SOFTWARE/LEGACY HW time stamping)\n\n",
progname, DEFAULT_PHC);
}
int main(int argc, char *argv[])
{
char *phc = DEFAULT_PHC, *progname;
int c, i, nports = 0;
struct interface iface[MAX_PORTS];
enum transport_type transport = TRANS_UDP_IPV4;
enum timestamp_type timestamping = TS_HARDWARE;
struct clock *clock;
/* Process the command line arguments. */
progname = strrchr(argv[0], '/');
progname = progname ? 1+progname : argv[0];
while (EOF != (c = getopt(argc, argv, "246hi:p:rsz"))) {
switch (c) {
case '2':
transport = TRANS_IEEE_802_3;
break;
case '4':
transport = TRANS_UDP_IPV4;
break;
case '6':
transport = TRANS_UDP_IPV6;
break;
case 'i':
if (nports < MAX_PORTS) {
iface[nports++].name = optarg;
} else {
fprintf(stderr, "too many interfaces\n");
return -1;
}
break;
case 'p':
phc = optarg;
break;
case 'r':
timestamping = TS_HARDWARE;
break;
case 's':
timestamping = TS_SOFTWARE;
break;
case 'z':
timestamping = TS_LEGACY_HW;
break;
case 'h':
usage(progname);
return 0;
case '?':
usage(progname);
return -1;
default:
usage(progname);
return -1;
}
}
if (!nports) {
usage(progname);
return -1;
}
for (i = 0; i < nports; i++) {
iface[i].transport = transport;
iface[i].timestamping = timestamping;
}
if (timestamping == TS_SOFTWARE || timestamping == TS_LEGACY_HW) {
phc = NULL;
}
ds.slaveOnly = TRUE; // TODO - make this programmable.
ds.priority1 = 128;
ds.clockQuality.clockClass = 255;
ds.clockQuality.clockAccuracy = 0xfe;
ds.clockQuality.offsetScaledLogVariance = 0xffff;
ds.priority2 = 128;
if (generate_clock_identity(&ds.clockIdentity, iface[0].name)) {
fprintf(stderr, "failed to generate a clock identity\n");
return -1;
}
clock = clock_create(phc, iface, nports, &ds);
if (!clock) {
fprintf(stderr, "failed to create a clock\n");
return -1;
}
while (running) {
if (clock_poll(clock))
break;
}
return 0;
}