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/**
* @file hwstamp_ctl.c
* @brief Utility program to set time stamping policy at the driver level.
* @note Copyright (C) 2012 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 <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include <arpa/inet.h>
#include <linux/net_tstamp.h>
#include <linux/sockios.h>
#include <net/if.h>
#include "version.h"
#include "missing.h"
static void usage(char *progname)
{
fprintf(stderr,
"\n"
"usage: %s [options]\n\n"
" -h prints this message and exits\n"
" -i [device] interface device to use, for example 'eth0'\n"
" -r [%d..%d] select receive time stamping:\n"
"\t\t%2d time stamp no incoming packet at all\n"
"\t\t%2d time stamp any incoming packet\n"
"\t\t%2d (reserved value)\n"
"\t\t%2d PTP v1, UDP, any kind of event packet\n"
"\t\t%2d PTP v1, UDP, Sync packet\n"
"\t\t%2d PTP v1, UDP, Delay_req packet\n"
"\t\t%2d PTP v2, UDP, any kind of event packet\n"
"\t\t%2d PTP v2, UDP, Sync packet\n"
"\t\t%2d PTP v2, UDP, Delay_req packet\n"
"\t\t%2d 802.AS1, Ethernet, any kind of event packet\n"
"\t\t%2d 802.AS1, Ethernet, Sync packet\n"
"\t\t%2d 802.AS1, Ethernet, Delay_req packet\n"
"\t\t%2d PTP v2/802.AS1, any layer, any kind of event packet\n"
"\t\t%2d PTP v2/802.AS1, any layer, Sync packet\n"
"\t\t%2d PTP v2/802.AS1, any layer, Delay_req packet\n"
" -t [%d|%d] disable or enable transmit time stamping\n"
" -v prints the software version and exits\n"
"\n",
progname,
HWTSTAMP_FILTER_NONE, HWTSTAMP_FILTER_PTP_V2_DELAY_REQ,
HWTSTAMP_FILTER_NONE,
HWTSTAMP_FILTER_ALL,
HWTSTAMP_FILTER_SOME,
HWTSTAMP_FILTER_PTP_V1_L4_EVENT,
HWTSTAMP_FILTER_PTP_V1_L4_SYNC,
HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ,
HWTSTAMP_FILTER_PTP_V2_L4_EVENT,
HWTSTAMP_FILTER_PTP_V2_L4_SYNC,
HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ,
HWTSTAMP_FILTER_PTP_V2_L2_EVENT,
HWTSTAMP_FILTER_PTP_V2_L2_SYNC,
HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ,
HWTSTAMP_FILTER_PTP_V2_EVENT,
HWTSTAMP_FILTER_PTP_V2_SYNC,
HWTSTAMP_FILTER_PTP_V2_DELAY_REQ,
HWTSTAMP_TX_OFF,
HWTSTAMP_TX_ON);
}
int main(int argc, char *argv[])
{
struct ifreq ifreq;
struct hwtstamp_config cfg;
char *device = NULL, *progname;
int c, err, fd, rxopt = HWTSTAMP_FILTER_NONE, txopt = HWTSTAMP_TX_OFF;
int setrx = 0, settx = 0;
/* Process the command line arguments. */
progname = strrchr(argv[0], '/');
progname = progname ? 1+progname : argv[0];
while (EOF != (c = getopt(argc, argv, "hi:r:t:v"))) {
switch (c) {
case 'i':
device = optarg;
break;
case 'r':
setrx = 1;
rxopt = atoi(optarg);
break;
case 't':
settx = 1;
txopt = atoi(optarg);
break;
case 'v':
version_show(stdout);
return 0;
case 'h':
usage(progname);
return 0;
case '?':
default:
usage(progname);
return -1;
}
}
if (!device) {
usage(progname);
return -1;
}
if (rxopt < HWTSTAMP_FILTER_NONE ||
rxopt > HWTSTAMP_FILTER_PTP_V2_DELAY_REQ ||
txopt < HWTSTAMP_TX_OFF || txopt > HWTSTAMP_TX_ON) {
usage(progname);
return -1;
}
memset(&ifreq, 0, sizeof(ifreq));
memset(&cfg, 0, sizeof(cfg));
strncpy(ifreq.ifr_name, device, sizeof(ifreq.ifr_name) - 1);
ifreq.ifr_data = (void *) &cfg;
fd = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP);
if (fd < 0) {
perror("socket");
return -1;
}
/* First, attempt to get the current settings. */
err = ioctl(fd, SIOCGHWTSTAMP, &ifreq);
if (err < 0) {
err = errno;
if (err == ENOTTY)
fprintf(stderr,
"Kernel does not have support "
"for non-destructive SIOCGHWTSTAMP.\n");
else if (err == EOPNOTSUPP)
fprintf(stderr,
"Device driver does not have support "
"for non-destructive SIOCGHWTSTAMP.\n");
else
perror("SIOCGHWTSTAMP failed");
} else {
printf("current settings:\n"
"tx_type %d\n"
"rx_filter %d\n",
cfg.tx_type, cfg.rx_filter);
}
/* Now, attempt to set values. Only change the values actually
* requested by user, rather than blindly resetting th zero if
* unrequested. */
if (settx || setrx) {
if (settx)
cfg.tx_type = txopt;
if (setrx)
cfg.rx_filter = rxopt;
err = ioctl(fd, SIOCSHWTSTAMP, &ifreq);
if (err < 0) {
err = errno;
perror("SIOCSHWTSTAMP failed");
if (err == ERANGE)
fprintf(stderr,
"The requested time stamping mode is "
"not supported by the hardware.\n");
} else {
printf("new settings:\n"
"tx_type %d\n"
"rx_filter %d\n",
cfg.tx_type, cfg.rx_filter);
}
}
return err;
}
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