Add the main program.

Signed-off-by: Richard Cochran <richardcochran@gmail.com>
master
Richard Cochran 2011-11-12 17:41:20 +01:00
parent 2a8711a125
commit 150897669e
3 changed files with 194 additions and 1 deletions

31
clock.h
View File

@ -20,6 +20,16 @@
#define HAVE_CLOCK_H
#include "ds.h"
#include "transport.h"
#define MAX_PORTS 8
/** Defines a network interface, with PTP options. */
struct interface {
char *name;
enum transport_type transport;
enum timestamp_type timestamping;
};
/** Opaque type. */
struct clock;
@ -47,6 +57,20 @@ struct port *clock_best_port(struct clock *c);
*/
UInteger8 clock_class(struct clock *c);
/**
* Create a clock instance. There can only be one clock in any system,
* so subsequent calls will destroy the previous clock instance.
*
* @param phc PTP hardware clock device to use.
* Pass NULL to select CLOCK_REALTIME.
* @param interface An array of network interfaces.
* @param count The number of elements in @a interfaces.
* @param ds A pointer to a default data set for the clock.
* @return A pointer to the single global clock instance.
*/
struct clock *clock_create(char *phc, struct interface *iface, int count,
struct defaultDS *ds);
/**
* Obtains a clock's default data set.
* @param c The clock instance.
@ -54,4 +78,11 @@ UInteger8 clock_class(struct clock *c);
*/
struct dataset *clock_default_ds(struct clock *c);
/**
* Poll for events and dispatch them.
* @param c A pointer to a clock instance obtained with clock_create().
* @return Zero on success, non-zero otherwise.
*/
int clock_poll(struct clock *c);
#endif

161
linuxptp.c 100644
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@ -0,0 +1,161 @@
/**
* @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 when SOFTWARE time stamping is selected)\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) {
phc = NULL;
}
ds.priority1 = 128;
ds.clockQuality.clockClass = 248;
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;
}

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@ -24,7 +24,8 @@ CFLAGS = -Wall $(INC) $(DEBUG)
LDFLAGS =
LDLIBS = -lm -lrt
PRG = linuxptp
OBJ = bmc.o fsm.o msg.o phc.o pi.o print.o servo.o transport.o udp.o util.o
OBJ = bmc.o fsm.o linuxptp.o msg.o phc.o pi.o print.o \
servo.o transport.o udp.o util.o
SRC = $(OBJ:.o=.c)
DEPEND = $(OBJ:.o=.d)