no message

Client_Clock_Sync/client.c

+#include <stdio.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <unistd.h> 
+#include <string.h> 
+#include <stdlib.h> 
+#include <sys/time.h>
+#include <errno.h>
+#include <pthread.h>
+#include <signal.h>
+#include<pthread.h>
+
+void test_time();
+void send_client_current_time(int socket_cli_fd);
+void receive_from_server();
+void print_err(char* str, int line, int err_no);
+void set_cli_sys_time();
+int create_socket_and_connect(char *s);
+void init_time();
+void init_sigaction(void);
+void prompt_info();
+
+typedef struct
+{
+	double sec;
+	double usec;
+}mytime;
+
+
+struct timeval start, end;
+mytime start_d,end_d,temp;
+
+int socket_fd = -1; /* client only has one socket file descript */
+int port = 5050;
+char server_ip[20];
+void  message(){
+	while (1)
+	{
+
+		sleep(3);
+		if(-1 == create_socket_and_connect(server_ip)){
+			printf("create socket with server failed\n");
+			//break;
+		}
+			
+		send_client_current_time(socket_fd);
+		receive_from_server();/* receive then close the socket */
+	}
+
+
+
+}
+int main(int argc, char* argv[])
+{
+	//init_time();
+	//init_sigaction();
+	set_cli_sys_time();
+
+	signal(SIGPIPE, SIG_IGN); /*  Ignore the signal  to end the program */
+	strcpy(server_ip,argv[1]);
+	printf("server IP : %s\n",argv[1]);
+	prompt_info();
+	//pthread_t id, send_id;
+	//pthread_create(&id, NULL, (void *)message, NULL);/* client 接收 server time 线程 */
+	int ttimes = 0;
+	while (1)
+	{	
+		ttimes++;
+		if(ttimes == 15){prompt_info();ttimes = 0;}
+		
+		sleep(1);
+		if(-1 == create_socket_and_connect(argv[1])){
+			printf("create socket with server failed\n");
+			break;
+		}
+			
+		send_client_current_time(socket_fd);
+		receive_from_server();
+		/* receive then close the socket */
+	}
+
+	close(socket_fd);
+	return 0;
+}
+
+
+void send_client_current_time(int socket_cli_fd)
+{
+	char sendbuf[1024] = "";
+	char *p = sendbuf;
+	char *pp = sendbuf;
+	gettimeofday(&start, NULL);
+	//printf("Client  发送过去的时间秒数是：%ld  s,  毫秒数是：%ld  us\n", start.tv_sec, start.tv_usec);	
+	start_d.sec = start.tv_sec;
+	start_d.usec = start.tv_usec;
+	memcpy(p, (char *)&start_d, sizeof(start_d));
+	//struct timeval* ppt = (struct timeval*)pp;
+	
+	int ret = send(socket_cli_fd,sendbuf, sizeof(sendbuf), 0);
+	
+	if (-1 == ret) {
+		print_err("Cli send failed", __LINE__, errno);
+	}else{
+		//printf("Client现在的时间秒数是：%ld  ,  %lf毫秒数是：%ld , %lf\n",start.tv_sec,start_d.sec,start.tv_usec,start_d.usec);
+		printf("Client 发送过去的时间秒数是：%lf  s,  毫秒数是：%lf  us\n", start_d.sec, start_d.usec);	
+
+	}
+
+}
+
+void receive_from_server()
+{
+	int ret = 0;
+	char recvbuf[1024] = "";
+	bzero(&end, sizeof(end));
+	ret = recv(socket_fd, recvbuf, sizeof(recvbuf), 0);
+	//recv(sockConn, recvbufFromSer, sizeof(recvbufFromSer),MSG_WAITALL)
+	if (ret < 0) {
+			print_err("recv failed", __LINE__, errno);
+	}
+	else {
+			gettimeofday(&end, NULL);
+			char *p  = recvbuf;
+			mytime* pp = (mytime *)p;
+			
+			printf("Server 发送过来的时间秒数是：%lf  s,  毫秒数是：%lf us\n",pp->sec, pp->usec);	
+			printf("Client 收到的时间秒数是：%ld  s,  毫秒数是：%ld  us\n", end.tv_sec, end.tv_usec);
+			//printf("Client 发送过去的时间秒数是：%ld  s,  毫秒数是：%ld  us\n", start.tv_sec, start.tv_usec);			
+			//(end.tv_sec * 1000000 + end.tv_usec) - (start.tv_sec * 1000000 + start.tv_usec);
+			//double fi = (end.tv_sec - start.tv_sec) * 1000.0 + (end.tv_usec - start.tv_usec) / 1000.0;
+			double ff = pp->usec / 1000.0 + pp->sec * 1000.0 - start.tv_usec /1000.0 - start.tv_sec * 1000.0;/*  client to  server */
+			double end_sec = end.tv_sec;
+			double end_usec = end.tv_usec;
+			double ff_sc = end_sec * 1000.0 + end_usec/1000.0 - pp->usec / 1000.0 - pp->sec * 1000.0; /* server to client */
+			printf("client ----------> server : %lf ms\n", ff);
+			printf("server ----------> client : %lf ms\n", ff_sc);
+			double travel_time = end_sec * 1000.0 + end_usec/1000.0 - start.tv_usec /1000.0 - start.tv_sec * 1000.0;
+			printf("client ----------> server ----------> client : %lf ms\n", travel_time);
+			printf("************************************************************\n\n");
+			close(socket_fd);
+	
+	}
+	//gettimeofday(&end, NULL);
+
+}
+
+int create_socket_and_connect(char *s)
+{
+		//1 创建tcp通信socket
+		int value = 1;
+		socket_fd = socket(AF_INET, SOCK_STREAM, 0);
+		if (socket_fd == -1)
+		{
+			perror("socket failed!\n");
+		}
+		setsockopt(socket_fd,SOL_SOCKET,SO_REUSEADDR,&value,sizeof(value));
+		//2 连接服务器
+		struct sockaddr_in server_addr = { 0 };
+		
+		server_addr.sin_family = AF_INET;//IPv4协议
+		server_addr.sin_port = htons(port);//服务器端口号
+		server_addr.sin_addr.s_addr = inet_addr(s);//inet_addr("192.168.0.3");//设置服务器IP// 127.0.0.1
+		int ret = connect(socket_fd, (struct sockaddr*)&server_addr, sizeof(server_addr));
+		if (ret == -1)
+		{
+			perror("connect failed!\n");
+			return -1;
+		}
+		else
+		{
+			printf("connect server successful!\n");
+			return 1;
+		}
+}
+
+
+void set_cli_sys_time()
+{
+	
+	struct timeval stime;
+	stime.tv_sec =1619400000;
+	stime.tv_usec =123;
+	if(settimeofday(&stime,NULL) == 0)
+	{
+	printf("********Wireless network clock synchronization system -Client V1.0********\n\n");
+	printf("Set cli time success\n\n");
+	sleep(1);
+	gettimeofday(&stime, NULL);
+	temp.sec = stime.tv_sec;
+	temp.usec = stime.tv_usec;
+	printf("Client现在的时间秒数是：%ld , %lf毫秒数是：%ld , %lf\n\n",stime.tv_sec,temp.sec,stime.tv_usec,temp.usec);
+	printf("Initial Client\n");
+	printf("Client begin time synchronize...\n");
+	}
+}
+
+void print_err(char* str, int line, int err_no) {
+	printf("%d, %s :%s\n", line, str, strerror(err_no));
+	_exit(-1);
+}
+
+void prompt_info()
+{
+	char exe[100] = "";
+	snprintf(exe,100,"ntpdate %s",server_ip);
+	//printf("exe : %s\n",exe);
+	printf("The client starts synchronizing the server clock, synchronizing the results：\n");
+	system(exe);
+}
+
+
+void init_sigaction(void)
+{
+	struct sigaction tact;
+	/*信号到了要执行的任务处理函数为prompt_info*/
+	tact.sa_handler = prompt_info;
+	tact.sa_flags = 0;
+	/*初始化信号集*/
+	sigemptyset(&tact.sa_mask);
+	/*建立信号处理机制*/
+	sigaction(SIGALRM, &tact, NULL);
+}
+
+void init_time()
+{
+	struct itimerval value;
+	/*设定执行任务的时间间隔为5秒0微秒*/
+	value.it_value.tv_sec = 10;
+	value.it_value.tv_usec = 0;
+	/*设定初始时间计数也为2秒0微秒*/
+	value.it_interval = value.it_value;
+	/*设置计时器ITIMER_REAL*/
+	setitimer(ITIMER_REAL, &value, NULL);
+}
+void test_time()
+{
+
+	gettimeofday(&start, NULL);
+	long int ti = (start.tv_sec * 1000000 + start.tv_usec);
+	printf("Client 发送过去的时间 : %ld us\n", ti);
+	char buf[1024] = { 0 };
+	memcpy(buf, &start, sizeof(start));
+	struct timeval* temp = (struct timeval*)buf;
+	ti = (temp->tv_sec * 1000000 + temp->tv_usec);
+	printf("time offset : %ld\n", ti);
+
+}
+

Client_Clock_Sync/common/ntpdate/Makefile.am

+NULL =
+
+BUILT_SOURCES =
+CLEANFILES =
+
+bin_PROGRAMS = $(NTPDATE_DB)
+libexec_PROGRAMS = $(NTPDATE_DL)
+sbin_PROGRAMS = $(NTPDATE_DS)
+
+EXTRA_PROGRAMS = ntpdate
+
+AM_CFLAGS = $(CFLAGS_NTP)
+AM_CFLAGS += $(NTP_HARD_CFLAGS)
+
+AM_CPPFLAGS  = $(NTP_INCS)
+AM_CPPFLAGS += $(CPPFLAGS_NTP)
+AM_CPPFLAGS += $(NTP_HARD_CPPFLAGS)
+
+AM_LDFLAGS = $(LDFLAGS_NTP)
+AM_LDFLAGS += $(NTP_HARD_LDFLAGS)
+
+# LDADD might need RESLIB and ADJLIB
+LDADD = version.o ../libntp/libntp.a
+ntpdate_LDADD  = $(LDADD) $(LDADD_LIBNTP) $(PTHREAD_LIBS) $(LIBOPTS_LDADD)
+ntpdate_LDADD += $(LIBM) $(LDADD_NTP)
+DISTCLEANFILES=	.version version.c stamp-v
+noinst_HEADERS=	ntpdate.h
+
+$(PROGRAMS): $(LDADD)
+
+$(top_srcdir)/sntp/scm-rev:
+	cd ../sntp && $(MAKE) $(AM_MAKEFLAGS) check-scm-rev
+
+version.c: $(ntpdate_OBJECTS) ../libntp/libntp.a Makefile $(top_srcdir)/sntp/scm-rev
+	env CSET=`cat $(top_srcdir)/sntp/scm-rev` $(top_builddir)/scripts/build/mkver ntpdate
+	
+version.o: version.c
+	env CCACHE_DISABLE=1 $(COMPILE) -c version.c -o version.o
+
+include $(top_srcdir)/bincheck.mf
+include $(top_srcdir)/sntp/check-libntp.mf
+include $(top_srcdir)/depsver.mf
+include $(top_srcdir)/includes.mf

Client_Clock_Sync/common/ntpdate/README

+README file for directory ./ntpdate of the NTP Version 4 distribution
+
+This directory contains the sources for the ntpdate utility program. See
+the README and RELNOTES files in the parent directory for directions on
+how to make and install this program. The current version number of this
+program is in the version.c file.
+

Client_Clock_Sync/common/ntpdate/ntpdate.h

+/*
+ * ntpdate.h - declarations for the ntpdate and ntptimeset programs
+ */
+
+#include "ntp_malloc.h"
+
+extern void	loadservers	(char *cfgpath);
+
+/*
+ * The server structure is a much simplified version of the
+ * peer structure, for ntpdate's use.  Since we always send
+ * in client mode and expect to receive in server mode, this
+ * leaves only a very limited number of things we need to
+ * remember about the server.
+ */
+struct server {
+	struct server *next_server;	/* next server in build list */
+	sockaddr_u srcadr;		/* address of remote host */
+	u_char version;			/* version to use */
+	u_char leap;			/* leap indicator */
+	u_char stratum;			/* stratum of remote server */
+	s_char precision;		/* server's clock precision */
+	u_char trust;			/* trustability of the filtered data */
+	u_fp rootdelay;			/* distance from primary clock */
+	u_fp rootdisp;			/* peer clock dispersion */
+	u_int32 refid;			/* peer reference ID */
+	l_fp reftime;			/* time of peer's last update */
+	u_long event_time;		/* time for next timeout */
+	u_long last_xmit;		/* time of last transmit */
+	u_short xmtcnt;			/* number of packets transmitted */
+	u_short rcvcnt;			/* number of packets received */
+	u_char reach;			/* reachability, NTP_WINDOW bits */
+	u_short filter_nextpt;		/* index into filter shift register */
+	s_fp filter_delay[NTP_SHIFT];	/* delay part of shift register */
+	l_fp filter_offset[NTP_SHIFT];	/* offset part of shift register */
+	s_fp filter_soffset[NTP_SHIFT]; /* offset in s_fp format, for disp */
+	u_fp filter_error[NTP_SHIFT];	/* error part of shift register */
+	l_fp org;			/* peer's originate time stamp */
+	l_fp xmt;			/* transmit time stamp */
+	u_fp delay;			/* filter estimated delay */
+	u_fp dispersion;		/* filter estimated dispersion */
+	l_fp offset;			/* filter estimated clock offset */
+	s_fp soffset;			/* fp version of above */
+};
+
+
+/*
+ * ntpdate runs everything on a simple, short timeout.  It sends a
+ * packet and sets the timeout (by default, to a small value suitable
+ * for a LAN).  If it receives a response it sends another request.
+ * If it times out it shifts zeroes into the filter and sends another
+ * request.
+ *
+ * The timer routine is run often (once every 1/5 second currently)
+ * so that time outs are done with reasonable precision.
+ */
+#define TIMER_HZ	(5)		/* 5 per second */
+
+/*
+ * ntpdate will make a long adjustment using adjtime() if the times
+ * are close, or step the time if the times are farther apart.  The
+ * following defines what is "close".
+ */
+#define	NTPDATE_THRESHOLD	(FP_SECOND >> 1)	/* 1/2 second */
+
+#define NTP_MAXAGE	86400	/* one day in seconds */
+
+/*
+ * When doing adjustments, ntpdate actually overadjusts (currently
+ * by 50%, though this may change).  While this will make it take longer
+ * to reach a steady state condition, it will typically result in
+ * the clock keeping more accurate time, on average.  The amount of
+ * overshoot is limited.
+ */
+#ifdef	NOTNOW
+#define	ADJ_OVERSHOOT	1/2	/* this is hard coded */
+#endif	/* NOTNOW */
+#define	ADJ_MAXOVERSHOOT	0x10000000	/* 50 ms as a ts fraction */
+
+/*
+ * Since ntpdate isn't aware of some of the things that normally get
+ * put in an NTP packet, we fix some values.
+ */
+#define	NTPDATE_PRECISION	(-6)		/* use this precision */
+#define	NTPDATE_DISTANCE	FP_SECOND	/* distance is 1 sec */
+#define	NTPDATE_DISP		FP_SECOND	/* so is the dispersion */
+#define	NTPDATE_REFID		(0)		/* reference ID to use */
+#define PEER_MAXDISP	(64*FP_SECOND)	/* maximum dispersion (fp 64) */
+
+
+/*
+ * No less than 2s between requests to a server to stay within ntpd's
+ * default "discard minimum 1" (and 1s enforcement slop).  That is
+ * enforced only if the nondefault limited restriction is in place, such
+ * as with "restrict ... limited" and "restrict ... kod limited".
+ */
+#define	MINTIMEOUT	(1 * TIMER_HZ)	/* 1s min. between packets */
+#define	DEFTIMEOUT	(2 * TIMER_HZ)	/* 2s by default */
+#define	DEFSAMPLES	4		/* get 4 samples per server */
+#define	DEFPRECISION	(-5)		/* the precision we claim */
+#define	DEFMAXPERIOD	60		/* maximum time to wait */
+#define	DEFMINSERVERS	3		/* minimum responding servers */
+#define	DEFMINVALID	1		/* mimimum servers with valid time */
+
+/*
+ * Define the max number of sockets we can open
+ */
+#define MAX_AF 2

Makefile.am

+ACLOCAL_AMFLAGS = -I sntp/m4 -I sntp/libevent/m4 -I sntp/libopts/m4
+
+NULL =
+
+# moved sntp first to get libtool and libevent built.
+
+SUBDIRS =		\
+	scripts		\
+	include		\
+	libntp		\
+	sntp		\
+	libparse	\
+	ntpd		\
+	ntpdate		\
+	ntpdc		\
+	ntpq		\
+	ntpsnmpd	\
+	parseutil	\
+	adjtimed	\
+	clockstuff	\
+	kernel		\
+	util		\
+	tests		\
+	$(NULL)
+
+DISTCHECK_CONFIGURE_FLAGS = -C --with-sntp --enable-local-libevent $(NTP_DCF)
+
+EXTRA_DIST =			\
+	$(srcdir)/COPYRIGHT	\
+	ChangeLog		\
+	CommitLog		\
+	CommitLog-4.1.0		\
+	NEWS			\
+	NOTES.y2kfixes		\
+	README.bk		\
+	README.hackers		\
+	README.leapsmear	\
+	README.patches		\
+	README.pullrequests	\
+	README.refclocks	\
+	README.versions		\
+	TODO			\
+	WHERE-TO-START		\
+	bootstrap		\
+	build			\
+	config.h.in		\
+	dot.emacs		\
+	flock-build		\
+	packageinfo.sh		\
+	readme.y2kfixes		\
+	results.y2kfixes	\
+	\
+	conf			\
+	html			\
+	lib/isc			\
+	libjsmn			\
+	ports			\
+	\
+	deps-ver		\
+	\
+	$(NULL)
+
+CLEANFILES =
+DISTCLEANFILES = .gcc-warning
+
+# HMS: Keep .gcc-warning first, as that way it gets printed first.
+BUILT_SOURCES =				\
+	.gcc-warning			\
+	libtool				\
+	html/.datecheck			\
+	$(srcdir)/COPYRIGHT		\
+	$(srcdir)/.checkChangeLog	\
+	$(NULL)
+
+.gcc-warning:
+	@echo "Compiling with GCC now generates lots of new warnings."
+	@echo " "
+	@echo "Don't be concerned. They're just warnings."
+	@echo " "
+	@echo "Don't send bug reports about the warnings, either."
+	@echo " "
+	@echo "Feel free to send patches that fix these warnings, though."
+	@echo " "
+	@sleep 1
+	@touch $@
+
+html/.datecheck: FRC.html
+	cd $(srcdir)/html && \
+	../scripts/build/checkHtmlFileDates
+
+libtool: $(LIBTOOL_DEPS)
+	./config.status --recheck
+
+sntp/built-sources-only: FRC.sntp
+	@cd sntp && $(MAKE) $(AM_MAKEFLAGS) built-sources-only
+
+$(srcdir)/COPYRIGHT: $(srcdir)/html/copyright.html
+	{ echo "This file is automatically generated from html/copyright.html" ; \
+	  lynx -dump $(srcdir)/html/copyright.html ;} > COPYRIGHT.new \
+	&& mv -f COPYRIGHT.new $(srcdir)/COPYRIGHT
+
+COPYRIGHT-please: $(srcdir)/COPYRIGHT
+	@: do-nothing action to prevent default \
+	   This target is needed by sntp/Makefile.am on decrepit \
+	   FreeBSD 6.x make which fails with "make COPYRIGHT" \
+	   configured in $(srcdir) but "make ./COPYRIGHT" succeeds. \
+	   Rather than determine our $(srcdir) from sntp/Makefile.am \
+	   COPYRIGHT-please serves as a fixed target.
+
+$(srcdir)/.checkChangeLog: $(srcdir)/ChangeLog $(srcdir)/scripts/build/checkChangeLog
+	cd $(srcdir) && \
+	./scripts/build/checkChangeLog
+
+dist-hook:
+	@find $(distdir) -type d -name SCCS -print | xargs rm -rf
+
+install-data-local:
+	@echo "Installing stand-alone HTML documentation"
+	@( cd $(srcdir) && \
+		for i in `find html -type d | grep -v SCCS` ; \
+		do $(INSTALL) -d $(DESTDIR)$(htmldir)/$$i ; done )
+	@( cd $(srcdir) && \
+		for i in `find html -type f | grep -v SCCS` ; \
+		do $(INSTALL_DATA) $$i $(DESTDIR)$(htmldir)/$$i ; done )
+
+uninstall-local:
+		rm -rf $(DESTDIR)$(htmldir)/html
+
+CommitLog: FRC.CommitLog
+	cd $(srcdir)					\
+	&& $(PATH_TEST) -e CommitLog			\
+		-a SCCS/s.ChangeSet -ot CommitLog	\
+	|| scripts/build/genCommitLog
+
+# HMS: The following seems to be a work-in-progress...
+
+CVO=`$(srcdir)/sntp/libevent/build-aux/config.guess`
+
+.buildcvo:
+	echo "$(CVO)" > .buildcvo
+
+.checkcvo: .buildcvo FRC.checkcvo
+	@if [ "`cat .buildcvo`" != "$(CVO)" ];then	\
+		echo "This directory was configured for `cat .buildcvo`"; \
+		echo "but this machine is a $(CVO)";	\
+		exit 1;	\
+	fi
+
+BHOST=`(hostname || uname -n)`
+
+.buildhost:
+	echo "$(BHOST)" > .buildhost
+
+.checkhost: .buildhost FRC.checkhost
+	@if [ "`cat .buildhost`" != "$(BHOST)" ];then	\
+		echo "Built on `cat .buildhost` but this is $(BHOST)"; \
+		echo " "; \
+	fi
+
+FRC.CommitLog FRC.checkcvo FRC.checkhost FRC.distwarn FRC.html FRC.sntp:
+	@: do-nothing action prevents any default
+
+# HMS: what was I trying to do with this?
+#dot.emacs: FRC.distwarn

NOTES.y2kfixes

+Name of the Application: xntp
+
+Version Number:  4.0.91
+
+Download Size: 4541953 bytes
+
+Downloaded from: http://www.eecis.udel.edu/~ntp/
+
+Operating Systems Supported: many
+
+Operating Systems Tested: unix
+
+Testing
+
+Dates tested (CPU clock set)
+
+	1999-12-31
+	2000-01-01
+	2000-02-29
+
+	Critical fragments of code tested with other dates by special
+	algorithms.
+
+Hardware Platform: Sun Sparc
+
+OS: Solaris 2.6
+
+Compiler: gcc
+
+Version: 2.8.1
+
+Repairs:  9
+
+No. of files Repaired: 13
+
+
+Compilation of Patches Required: yes
+
+Results Description:
+
+1)	Tested suspicious code.
+
+2)	Repaired problem code and added documentation to ntp.h.
+
+3)	Verified ntpd works on critical Y2K dates.
+
+
+Comments:
+
+1)	Errors were found in improper use of tm_year within struct tm,
+	calculations that did not support year 2000 as a leap year
+	(it truly is, despite any unchanged comments remaining in 
+	the NTP source), and some incorrect date calculations, while
+	not traditional Y2K errors, would break in the year 2000.
+
+2)	include/ntpd.h
+    	Added some definitions and documentation about the right way
+        of doing things.  Definitions used by most, if not all, of
+        the Y2K repairs.
+
+Cautions:
+
+1)	Some of the Y2K repairs were to reference clock drivers that
+	we did not have the local hardware to test.  While I believe
+	the changes are sound, they really need to be tested.
+	This includes:
+
+		refclock_arc.c
+		refclock_heath.c
+		refclock_hpgps.c
+
+	Also, parseutil/dcfd.c is another hardware dependent module that
+	was repaired without live testing.
+
+Non-Y2K Problems Observed:
+
+1)	Inconsistent casts of variables containing time values may
+	make expansion to 64 bit integer values in a portable manner
+	difficult.
+
+2)	libntp/caltontp.c:
+        Has logic I believe will fail starting in year 2100 or so.
+        Left unchanged/untested as it works well beyond basic NTP 2036 
+	limit checked by check_y2k.c.
+        If NTP is implemented on 64-bit machines, this should be fixed
+
+3)	ntpd/refclock_acts.c:
+	ACTS time format has changed somewhat since the code was written.
+	In particular the '*' '#' character switch no longer occurs...
+	only '*' is typed.
+
+      NOTE: Author (falsely) stated Y2K is NOT a leap year when it 
+      really is.
+
+      TRUTH: ACTS will go beyond Y2K: it uses FourDigitYear % 100 values
+      for year so year 2000 will revert to "00".
+
+
+4)     ntpd/refclock_oncore.c
+       Some very strange logic in manipulating year values:
+       1122         instance->pp->year = buf[6]*256+buf[7];
+       Multiply by 256????
+ 
+    Response from PHK:
+       The entire protocol is binary, the year is a 16 bit quantity 
+       which according to the manual can have the range 1998-2018. 
+ 

README

+
+Submit patches, bug reports, and enhancement requests via
+
+			http://bugs.ntp.org
+
+		  The ntp Distribution Base Directory
+
+This directory and its subdirectories contain the Network Time Protocol
+Version 4 (NTP) distribution for Unix and Windows/NT systems.  This release
+may still work on VxWorks, too.
+
+The contents of the base directory are given in this file. The contents of
+subdirectories are given in the README files in each subdirectory.
+
+A complete explanation of the configure, compile and install process, as
+well as setting up an NTP subnet, is in the HTML pages in the ./html/
+directory. For more information on NTP and how to get a working setup,
+read WHERE-TO-START.
+
+For Windows/NT, visit html/build/hints/winnt.html .
+
+The base directory ./ contains the autoconfiguration files, source
+directories and related stuff:
+
+COPYRIGHT	Excerpt from the HTML file ./html/copyright.html. This file
+		specifies copyright conditions, together with a list of
+		major authors and electric addresses.
+
+INSTALL		Generic installation instructions for autoconf-based programs.
+		Unless you really know what you are doing, you should read the
+		directions in the HTML pages, starting with ./html/index.html.
+
+NEWS		What's new in this release.
+
+README		This file.
+
+README.bk	Instructions for folks who use the BitKeeper-repository
+		version of NTP.
+
+README.hackers	Notes to folks who want to hack on the code.
+
+TODO            List of items the NTP developers are working on.
+
+WHERE-TO-START	Hints on what to read in order to get a working
+		configuration.
+
+Makefile.am	Automake file configuration file. Edit only if you have the
+		GNU automake and autoconf utilities installed.
+
+Makefile.in	Autoconf make file template for Unix.
+
+adjtimed        Directory containing the sources for the adjtime daemon
+		for HP/UX systems prior to HP-UX 10.0.
+
+authstuff       Directory containing sources for miscellaneous programs
+		to test, calibrate and certify the cryptographic
+		mechanisms for DES and MD5 based authentication. These
+		programs do not include the cryptographic routines
+		themselves, so are free of U.S. export restrictions.
+
+build		A script to build the distribution in A.`config.guess`
+		subdirectory (more or less).
+
+clockstuff	Directory containing sources for miscellaneous programs
+		to test certain auxiliary programs used with some kernel
+		configurations, together with a program to calculate
+		propagation delays for use with radio clocks and
+		national time dissemination services such as WWV/WWVH,
+		WWVB and CHU.
+
+conf            Directory containing a motley collection of
+		configuration files for various systems. For example only.
+
+config.guess	Script used to identify the machine architecture and
+		operating system.
+
+config.h.in	Configuration file generated automatically from
+		configure.in. Do not edit.
+
+configure	Script used to configure the distribution. See the HTML pages
+		(./html/index.html) for a complete description of the options
+		available.
+
+configure.in	Master configuration template. Edit only if you have the
+		GNU automake and autoconf utilities installed.
+
+dot.emacs	C-mode indentation rules for code "Just the way Dave likes it".
+
+flock_build	(UDel only) Build the distribution on a number of
+		different platforms.
+
+html            Directory containing a complete set of documentation on
+		building and configuring a NTP server or client. The
+		documentation is in the form of HTML files suitable for
+		browsing and contains links to additional documentation
+		at various web sites. If a browser is unavailable, an
+		ordinary text editor can be used.
+
+include		Directory containing include header files used by most
+		programs in the distribution.
+
+install-sh	Script to install a program, script or data file.
+
+kernel		Directory containing sources for kernel programs such as
+		line disciplines and STREAMS modules used with the CHU
+		decoder and precision PPS signals.
+
+libntp		Directory containing library source code used by most
+		programs in the distribution.
+
+ntpdate		Directory containing sources for a program to set the
+		local machine time from one or more remote machines
+		running NTP.  Operates like rdate, but much more accurate.
+
+ntpq            Directory containing sources for a utility program to
+		query local and remote NTP peers for state variables and
+		related timekeeping information. This program conforms
+		to Appendix A of the NTP Version 3 Specification RFC 1305.
+
+ntptrace        Directory containing sources for a utility program that
+		can be used to reveal the chain of NTP peers from a
+		designated peer to the primary server at the root of the
+		timekeeping subnet.
+
+parse		Directory containing files belonging to the generic
+		parse reference clock driver. For reasonably simple
+		clocks it is possible to get away with about 3-4Kb of
+		code. additionally the SunOS 4.x/Solaris 5.3 streams
+		module for parse squats here.
+
+patches		Directory containing patches already applied to this
+		distribution. These are included for record and to help
+		in possible porting problems.
+
+scripts		Directory containing scripts to build the configuration
+		files in this directory and then the makefiles used in
+		various dependent directories. the subdirectories
+		monitoring and support hold various perl and shell
+		scripts for visualizing synchronization and daemon startup.
+
+stamp.h.in	Configuration file generated automatically from configure.in.
+		Do not edit.
+
+util            Directory containing sources for various utility and
+		testing programs.
+
+David L. Mills (mills@udel.edu)
+21 June 1998

README.bk

+In order to use the BitKeeper repository version of NTP you should visit
+
+ http://support.ntp.org/Main/SoftwareDevelopment
+
+for important information.
+
+If you want to submit patches, please see the README.hackers file.

README.hackers

+Notes to hackers.
+
+See README.patches for information about submitting patches.
+
+---
+
+Dave likes this code indented formatted in a consistent way.
+The file "dot.emacs" has the emacs C-mode indentation style that Dave likes.
+
+---
+
+We'd like to see *all* system function declarations live in include/l_stdlib.h
+and NEVER appear in the .c files.
+
+---

README.patches

+See README.hackers for notes on coding styles.
+
+The master copy of this information can be found at:
+
+ http://support.ntp.org/Dev/MaintainerIssues#How_to_work_on_a_bug_using_BitKe
+
+If you are going to patch both ntp-stable and ntp-dev
+please do it this way:
+
+ > cd ntp-stable
+ > (make and test your changes to ntp-stable first)
+ > (commit your changes to ntp-stable)
+ > cd ../ntp-dev
+ > bk pull ../ntp-stable	(get your changes from ntp-stable)
+ > (resolve any problems and test your changes)
+ > (commit your changes to ntp-dev)
+
+With the current release of bitkeeper it is *much* easier to move changes
+from ntp-stable to ntp-dev than it is to move changes from ntp-dev to
+ntp-stable.
+
+If you make your changes in the above order and then submit them,
+it will be trivial to apply your patches.
+
+Otherwise, it will be much more difficult to apply your patches.
+
+You are pretty much done now if your repos are on pogo.udel.edu.
+
+If these patches are for a bugzilla issue, mark the issue as Resolved/READY
+with a comment of "Please pick up the patches in pogo:/wherever"
+
+---
+
+Please read (and follow) the previous section if you want to submit
+patches for both ntp-stable and ntp-dev.
+
+If you cannot easily get your patches to pogo, you may submit patches
+via the 'bk send' command:
+
+ > cd REPO
+ > bk citool	(or bk ci ... ;  bk commit ... )
+ > bk pull	# make sure your repo is up-to-date
+ > bk send -d -ubk://www.ntp.org/home/bk/REPO - > file-containing-the-patch
+ > bk receive -vv -a < file-containing-the-patch
+		# Sanity check.
+
+ # Open a bugzilla item at <http://bugzilla.ntp.org>
+
+ # After the bug is opened, visit the bug and attach file-containing-the-patch

README.pullrequests

+See README.hackers for notes on coding styles.
+
+The NTP project's github repository is at https://github.com/ntp-project/ntp.
+
+There are two branches, master and stable.
+
+The stable branch is the current supported production code branch, the
+ntp-stable code (even 2nd number).
+
+The master branch is for new development, also known as ntp-dev (which
+has an odd 2nd number).
+
+If you have some work you'd like to add, then if there is any interest
+in seeing that work in the current production release then base your work
+on the stable branch, and pull your work into a master copy to allow for
+publishing your changes in the ntp-dev or master branch.
+
+If there is no expectation that your work will be included in the
+current stable release (the ntp-stable code) then it's better to do your
+work on a copy of the master branch.
+
+Make sure that any changes you make to stable pull cleanly into master.
+
+It's possible that after pulling your changes from stable to master that
+some additional cleanup will be required in master.  Please do this.
+
+If you follow this method, then if you submit a pull request for either
+master or for master+stable, it will be easy for us to evaluate and
+incorporate your work.
+
+Please also note that your submissions will be able to be evaluated and
+handled sooner if the repo that contains your pull requests also includes
+test cases.
+
+The general workflow is as follows:
+
+1) If you haven't, create a fork of ntp-project/ntp with your github account.
+   i) Log on to github.com with your github account.
+       - If you don't have one, create one first. (read: https://help.github.com/articles/signing-up-for-a-new-github-account)
+       - Make sure you also have a SSH key associated with your github account.
+         (read: https://help.github.com/articles/generating-ssh-keys/)
+   ii) Go to https://github.com/ntp-project/ntp
+   iii) On the top right corner, right below the header bar, there is
+        a button labeled "Fork".  Click on it.  This will fork the current
+	ntp master to your own account. Once done, it will go to your account's
+	version of the ntp repository. (Your fork of ntp source)
+   iv) Clone a local version of your fork. 
+        - git clone git@github.com:<your_username>/ntp
+
+2) Look through the bugs listed in the bug tracker: http://bugs.ntp.org/
+
+3) Once you've found a bug to work on:
+
+   i) Create a branch off your own master branch of your local fork.
+      (the <branchname> can be any valid short string that will tell you
+       what you're working on)
+      - git checkout -b <branchname>
+        
+   ii) Start working on the bug.
+   iii) When you create changes in the source, it would help you to 
+        keep track of your changes by committing to your local repo.
+	(This way, every small change is tracked and when you've
+	 made a mistake, you can always go back.)
+	 - git commit -a -m "description of change"
+   iv) Once you are satisfied, you can push to your github account's
+       repository.
+         - git push origin <branchname>
+    v) (go to step iii).
+
+4) Once you feel you've fixed the bug (and tested it), you need to 
+   create a pull request on your branch on github.  (Read up on
+   pull requests @ https://help.github.com/articles/using-pull-requests)
+
+    i) Create your pullrequest by following the instructions @
+       https://help.github.com/articles/creating-a-pull-request/
+
+5) Your pull request will be reviewed by committers and when it
+   passes review, it will be merged by the reviewer/allowed committer.
+
+6) You have fixed a bug.  Goto step #2.
+
+If these patches are for a bugzilla issue, mark the issue as Resolved/READY
+with a comment of "Please pick up the patches from XXX" where XXX is
+something like:
+
+ hostname:~user/path	if it's a machine the reviewers have access to, or
+ github-pull-request-URI
+
+---
+

README.refclocks

+This is a list of the #define REFCLK_* stuff.
+
+If you want to add a new refclock let us know and we'll assign you a number.
+
+Should this list also include the name of the party responsible for the
+refclock?
+
+LOCALCLOCK	1	/* external (e.g., lockclock) */
+GPS_TRAK	2	/* TRAK 8810 GPS Receiver */
+WWV_PST		3	/* PST/Traconex 1020 WWV/H */
+SPECTRACOM	4	/* Spectracom (generic) Receivers */
+TRUETIME	5	/* TrueTime (generic) Receivers */
+IRIG_AUDIO	6	/* IRIG-B/W audio decoder */
+CHU_AUDIO	7	/* CHU audio demodulator/decoder */
+PARSE		8	/* generic driver (usually DCF77,GPS,MSF) */
+GPS_MX4200	9	/* Magnavox MX4200 GPS */
+GPS_AS2201	10	/* Austron 2201A GPS */
+GPS_ARBITER	11	/* Arbiter 1088A/B/ GPS */
+IRIG_TPRO	12	/* KSI/Odetics TPRO-S IRIG */
+ATOM_LEITCH	13	/* Leitch CSD 5300 Master Clock */
+MSF_EES		14	/* EES M201 MSF Receiver */
+GPSTM_TRUE	15	/* OLD TrueTime GPS/TM-TMD Receiver */
+IRIG_BANCOMM	16	/* Bancomm GPS/IRIG Interface */
+GPS_DATUM	17	/* Datum Programmable Time System */
+NIST_ACTS	18	/* NIST Auto Computer Time Service */
+WWV_HEATH	19	/* Heath GC1000 WWV/WWVH Receiver */
+GPS_NMEA	20	/* NMEA based GPS clock */
+GPS_VME		21	/* TrueTime GPS-VME Interface */
+ATOM_PPS	22	/* 1-PPS Clock Discipline */
+PTB_ACTS	NIST_ACTS
+USNO		NIST_ACTS
+GPS_HP		26	/* HP 58503A Time/Frequency Receiver */
+ARCRON_MSF	27	/* ARCRON MSF radio clock. */
+SHM		28	/* clock attached thru shared memory */
+PALISADE	29	/* Trimble Navigation Palisade GPS */
+ONCORE		30	/* Motorola UT Oncore GPS */
+GPS_JUPITER	31	/* Rockwell Jupiter GPS receiver */
+CHRONOLOG	32	/* Chrono-log K WWVB receiver */
+DUMBCLOCK	33	/* Dumb localtime clock */
+ULINK		34	/* Ultralink M320 WWVB receiver */
+PCF		35	/* Conrad parallel port radio clock */
+WWV_AUDIO	36	/* WWV/H audio demodulator/decoder */
+FG		37	/* Forum Graphic GPS */
+HOPF_SERIAL	38	/* hopf DCF77/GPS serial line receiver */
+HOPF_PCI	39	/* hopf DCF77/GPS PCI receiver */
+JJY		40	/* JJY receiver */
+TT560		41	/* TrueTime 560 IRIG-B decoder */
+ZYFER		42	/* Zyfer GPStarplus receiver */
+RIPENCC		43	/* RIPE NCC Trimble driver */
+???????		44	Claas Hilbrecht (20020711)

README.versions

+
+NTP uses A.B.C - style release numbers.
+
+At the moment:
+
+ A is 4, for ntp V4.
+ B is the major release number.
+ C is the minor release number.  Even numbers are 'stable' releases and
+ odd numbers are "development" releases.
+
+Following the release number may be the letter 'p' followed by a number.
+This indicates a point (or patch) release.
+
+Release candidates have -RC in the release number.
+
+Here are some recent versions numbers as an example:
+
+ 4.2.2		A production release (from the ntp-stable repository)
+ 4.2.2p2	A production release (from the ntp-stable repository)
+ 4.2.3p12	A development release
+ 4.2.3p15-rc1	A release candidate for 4.2.4
+
+Note that after the ntp-dev repo produces a production release it will
+be copied into the ntp-stable and the cycle will repeat.
+
+Feel free to suggest improvements...
+

Server_Clock_Sync/common/ntpd/complete.conf.in

+saveconfigdir "/etc/ntp/conf"
+driftfile "/etc/ntp.drift"
+logfile "/var/log/ntp.log"
+leapfile "/etc/ntp.leapseconds" ignorehash
+leapfile "/etc/ntp.leapseconds" checkhash
+@HAVE_LEAPSMEARINTERVAL@
+nonvolatile 1e-7
+ident "udent"
+dscp 46
+logconfig =allall -allinfo -allevents -allstatistics -allstatus +allall -clockinfo -clockevents -clockstatistics -clockstatus +clockall -syncinfo -syncevents -syncstatistics -syncstatus +syncall -sysinfo -sysevents -sysstatistics -sysstatus +sysall
+statsdir "/etc/ntp/stats"
+statistics clockstats cryptostats loopstats peerstats protostats rawstats sysstats timingstats
+filegen clockstats file clockstats type none enable
+filegen cryptostats file cryptostats type pid link disable
+filegen loopstats file loopstats type day nolink enable
+filegen peerstats file peerstats type week enable
+filegen protostats file stats type month enable
+filegen rawstats file rawstats type year nolink enable
+filegen sysstats file sysstats type age enable
+filegen timingstats file timingstats type none disable
+crypto digest md5 host myhostname ident wedent pw cryptopass randfile /.rnd
+revoke 10
+keysdir "/etc/ntp/keys"
+keys "/etc/ntp.keys"
+trustedkey 1 2 3 4 5 6 7 8 9 10 11 12 (14 ... 16) 18 (32768 ... 65535)
+controlkey 12
+requestkey 12
+enable auth ntp monitor stats
+disable bclient calibrate kernel mode7 peer_clear_digest_early unpeer_crypto_early unpeer_crypto_nak_early unpeer_digest_early
+tos beacon 3600 ceiling 16 cohort 0 floor 1 maxclock 10 maxdist 1.5 minclock 3 mindist 0.001 minsane 1 orphan 16 orphanwait 300 bcpollbstep 3
+rlimit@HAVE_RLIMIT_MEMLOCK@@HAVE_RLIMIT_STACK@
+tinker allan 1500 dispersion 15 freq 0 huffpuff 7200 panic 1000 step 0.128 stepout 900 tick 0.01
+broadcastclient
+server 127.127.1.0 mode 4294967295 prefer true
+fudge 127.127.1.0 time1 0 time2 1.1 stratum 7 refid Abcd minjitter 0.2
+pool 0.north-america.pool.ntp.org. iburst preempt
+server 1.north-america.pool.ntp.org. iburst
+server -4 2.north-america.pool.ntp.org. minpoll 6 maxpoll 10 iburst
+server -6 ntp.davehart.net. minpoll 6 maxpoll 10 version 5 burst iburst
+peer -6 davehart.broker.freenet6.net. ident "autokey-group" xleave autokey
+peer -4 192.168.192.168 key 1 noselect
+server [fe80::123%1] xmtnonce
+broadcast 192.168.192.255
+manycastclient 224.0.1.1
+manycastclient ff05::101
+manycastserver 224.0.1.1 ff05::101
+multicastclient 224.0.1.1 ff05::101
+mru maxage 64 mindepth 600 initalloc 600 initmem 16 incalloc 99 incmem 4 maxdepth 1024 maxmem 4096
+discard minimum 1 average 3 monitor 3000
+pollskewlist 3 1|2 4 3|4 default 6|7
+restrict default ippeerlimit -1
+restrict default ippeerlimit 0 nomodify limited kod noserve nomrulist
+restrict source ippeerlimit 1
+restrict source ippeerlimit 2 nomodify limited kod
+restrict trusted.host.name.example.com. ippeerlimit -1 nomodify
+restrict [fe80::1] mask [ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff] ippeerlimit -1
+restrict 127.0.0.1 mask 255.255.255.255 ippeerlimit -1
+restrict 127.0.0.2 ippeerlimit -1 serverresponse fuzz
+restrict ::1 ippeerlimit -1
+interface drop ipv6
+interface ignore ipv4
+interface drop wildcard
+interface listen eth0
+interface listen ipv6
+interface listen 192.168.192.0/24
+interface listen 192.168.193.1
+phone "ATDT13034944774" "ATDT12027621594"
+setvar varnondef = "this variable does not have default after the value"
+setvar vanity = "name plate" default
+trap 127.0.0.1 interface 127.0.0.1 port 1234
+trap 127.0.0.2
+reset allpeers auth ctl io mem sys timer

Server_Clock_Sync/common/ntpd/declcond.h

+/*
+ * declcond.h - declarations conditionalized for ntpd
+ *
+ * The NTP reference implementation distribution includes two distinct
+ * declcond.h files, one in ntpd/ used only by ntpd, and another in
+ * include/ used by libntp and utilities.  This relies on the source
+ * file's directory being ahead of include/ in the include search.
+ *
+ * The ntpd variant of declcond.h declares "debug" only #ifdef DEBUG,
+ * as the --disable-debugging version of ntpd should not reference
+ * "debug".  The libntp and utilities variant always declares debug,
+ * as it is used in those codebases even without DEBUG defined.
+ */
+#ifndef DECLCOND_H
+#define DECLCOND_H
+
+#ifdef DEBUG			/* uncommented in ntpd/declcond.h */
+extern int debug;
+#endif				/* uncommented in ntpd/declcond.h */
+
+#endif	/* DECLCOND_H */

Server_Clock_Sync/common/ntpd/invoke-ntp.conf.menu

+* ntp.conf Notes::                 Notes about ntp.conf

Server_Clock_Sync/common/ntpd/invoke-ntp.keys.menu

+* ntp.keys Notes::                 Notes about ntp.keys

Server_Clock_Sync/common/ntpd/invoke-ntpd.menu

+* ntpd Invocation::                Invoking ntpd

Server_Clock_Sync/common/ntpd/keyword-gen-utd

+ *	 Generated 2020-02-13 08:56:28 UTC	  diff_ignore_line

Server_Clock_Sync/common/ntpd/psl0.conf

+pollskewlist default 0|0

Server_Clock_Sync/common/ntpd/psl1.conf

+pollskewlist default 4|4

Server_Clock_Sync/common/ntpd/psl2.conf

+pollskewlist 3 3|3 4 4|4 default 5|5