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- /*
- * Copyright (c) 1983 Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
- #ifndef lint
- static char sccsid[] = "@(#)cmds.c 2.8 (Berkeley) 3/2/91";
- #endif /* not lint */
-
- #include "timedc.h"
- #include <netinet/in_systm.h>
- #include <netinet/ip.h>
- #include <netinet/ip_icmp.h>
- #define TSPTYPES
- #include <protocols/timed.h>
- #include <sys/file.h>
-
- int id;
- int sock;
- int sock_raw;
- char hostname[MAXHOSTNAMELEN];
- struct hostent *hp, *gethostbyname();
- struct sockaddr_in server;
- extern int measure_delta;
- int bytenetorder(), bytehostorder();
- char *strcpy();
-
- /*
- * Clockdiff computes the difference between the time of the machine on
- * which it is called and the time of the machines given as argument.
- * The time differences measured by clockdiff are obtained using a sequence
- * of ICMP TSTAMP messages which are returned to the sender by the IP module
- * in the remote machine.
- * In order to compare clocks of machines in different time zones, the time
- * is transmitted (as a 32-bit value) in milliseconds since midnight UT.
- * If a hosts uses a different time format, it should set the high order
- * bit of the 32-bit quantity it transmits.
- * However, VMS apparently transmits the time in milliseconds since midnight
- * local time (rather than GMT) without setting the high order bit.
- * Furthermore, it does not understand daylight-saving time. This makes
- * clockdiff behaving inconsistently with hosts running VMS.
- *
- * In order to reduce the sensitivity to the variance of message transmission
- * time, clockdiff sends a sequence of messages. Yet, measures between
- * two `distant' hosts can be affected by a small error. The error can, however,
- * be reduced by increasing the number of messages sent in each measurement.
- */
-
- clockdiff(argc, argv)
- int argc;
- char *argv[];
- {
- int measure_status;
- struct timeval ack;
- int measure();
-
- if(argc < 2) {
- printf("Usage: clockdiff host ... \n");
- return;
- }
-
- id = getpid();
- (void)gethostname(hostname,sizeof(hostname));
-
- while (argc > 1) {
- argc--; argv++;
- hp = gethostbyname(*argv);
- if (hp == NULL) {
- fprintf(stderr, "timed: %s: ", *argv);
- herror((char *)NULL);
- continue;
- }
- server.sin_family = hp->h_addrtype;
- bcopy(hp->h_addr, &(server.sin_addr.s_addr), hp->h_length);
- ack.tv_sec = 10;
- ack.tv_usec = 0;
- if ((measure_status = measure(&ack, &server)) < 0) {
- perror("measure");
- return;
- }
- switch (measure_status) {
-
- case HOSTDOWN:
- printf("%s is down\n", hp->h_name);
- continue;
- break;
- case NONSTDTIME:
- printf("%s time transmitted in a non-standard format\n", hp->h_name);
- continue;
- break;
- case UNREACHABLE:
- printf("%s is unreachable\n", hp->h_name);
- continue;
- break;
- default:
- break;
- }
-
- if (measure_delta > 0)
- printf("time on %s is %d ms. ahead of time on %s\n",
- hp->h_name, measure_delta,
- hostname);
- else
- if (measure_delta == 0)
- printf("%s and %s have the same time\n",
- hp->h_name, hostname);
- else
- printf("time on %s is %d ms. behind time on %s\n",
- hp->h_name, -measure_delta, hostname);
- }
- return;
- }
- /*
- * finds location of master timedaemon
- */
-
- msite(argc)
- int argc;
- {
- int length;
- int cc;
- fd_set ready;
- struct sockaddr_in dest;
- struct timeval tout;
- struct sockaddr_in from;
- struct tsp msg;
- struct servent *srvp;
-
- if (argc != 1) {
- printf("Usage: msite\n");
- return;
- }
-
- srvp = getservbyname("timed", "udp");
- if (srvp == 0) {
- fprintf(stderr, "udp/timed: unknown service\n");
- return;
- }
- dest.sin_port = srvp->s_port;
- dest.sin_family = AF_INET;
-
- (void)gethostname(hostname, sizeof(hostname));
- hp = gethostbyname(hostname);
- if (hp == NULL) {
- fprintf(stderr, "timed: %s: ", hostname);
- herror((char *)NULL);
- return;
- }
- bcopy(hp->h_addr, &dest.sin_addr.s_addr, hp->h_length);
-
- (void)strcpy(msg.tsp_name, hostname);
- msg.tsp_type = TSP_MSITE;
- msg.tsp_vers = TSPVERSION;
- bytenetorder(&msg);
- length = sizeof(struct sockaddr_in);
- if (sendto(sock, (char *)&msg, sizeof(struct tsp), 0,
- (struct sockaddr *)&dest, length) < 0) {
- perror("sendto");
- return;
- }
-
- tout.tv_sec = 15;
- tout.tv_usec = 0;
- FD_ZERO(&ready);
- FD_SET(sock, &ready);
- if (select(FD_SETSIZE, &ready, (fd_set *)0, (fd_set *)0, &tout)) {
- length = sizeof(struct sockaddr_in);
- cc = recvfrom(sock, (char *)&msg, sizeof(struct tsp), 0,
- (struct sockaddr *)&from, &length);
- if (cc < 0) {
- perror("recvfrom");
- return;
- }
- bytehostorder(&msg);
- if (msg.tsp_type == TSP_ACK)
- printf("master timedaemon runs on %s\n", msg.tsp_name);
- else
- printf("received wrong ack: %s\n",
- tsptype[msg.tsp_type]);
- } else
- printf("communication error\n");
- }
-
- /*
- * quits timedc
- */
-
- quit()
- {
- exit(0);
- }
-
- #define MAXH 4 /* max no. of hosts where election can occur */
-
- /*
- * Causes the election timer to expire on the selected hosts
- * It sends just one udp message per machine, relying on
- * reliability of communication channel.
- */
-
- testing(argc, argv)
- int argc;
- char *argv[];
- {
- int length;
- int nhosts;
- struct servent *srvp;
- struct sockaddr_in sin[MAXH];
- struct tsp msg;
-
- if(argc < 2) {
- printf("Usage: testing host ...\n");
- return;
- }
-
- srvp = getservbyname("timed", "udp");
- if (srvp == 0) {
- fprintf(stderr, "udp/timed: unknown service\n");
- return;
- }
-
- nhosts = 0;
- while (argc > 1) {
- argc--; argv++;
- hp = gethostbyname(*argv);
- if (hp == NULL) {
- fprintf(stderr, "timed: %s: ", *argv);
- herror((char *)NULL);
- argc--; argv++;
- continue;
- }
- sin[nhosts].sin_port = srvp->s_port;
- sin[nhosts].sin_family = hp->h_addrtype;
- bcopy(hp->h_addr, &(sin[nhosts].sin_addr.s_addr), hp->h_length);
- if (++nhosts == MAXH)
- break;
- }
-
- msg.tsp_type = TSP_TEST;
- msg.tsp_vers = TSPVERSION;
- (void)gethostname(hostname, sizeof(hostname));
- (void)strcpy(msg.tsp_name, hostname);
- bytenetorder(&msg); /* it is not really necessary here */
- while (nhosts-- > 0) {
- length = sizeof(struct sockaddr_in);
- if (sendto(sock, (char *)&msg, sizeof(struct tsp), 0,
- (struct sockaddr *)&sin[nhosts], length) < 0) {
- perror("sendto");
- return;
- }
- }
- }
-
- /*
- * Enables or disables tracing on local timedaemon
- */
-
- tracing(argc, argv)
- int argc;
- char *argv[];
- {
- int onflag;
- int length;
- int cc;
- fd_set ready;
- struct sockaddr_in dest;
- struct timeval tout;
- struct sockaddr_in from;
- struct tsp msg;
- struct servent *srvp;
-
- if (argc != 2) {
- printf("Usage: tracing { on | off }\n");
- return;
- }
-
- srvp = getservbyname("timed", "udp");
- if (srvp == 0) {
- fprintf(stderr, "udp/timed: unknown service\n");
- return;
- }
- dest.sin_port = srvp->s_port;
- dest.sin_family = AF_INET;
-
- (void)gethostname(hostname,sizeof(hostname));
- hp = gethostbyname(hostname);
- bcopy(hp->h_addr, &dest.sin_addr.s_addr, hp->h_length);
-
- if (strcmp(argv[1], "on") == 0) {
- msg.tsp_type = TSP_TRACEON;
- onflag = ON;
- } else {
- msg.tsp_type = TSP_TRACEOFF;
- onflag = OFF;
- }
-
- (void)strcpy(msg.tsp_name, hostname);
- msg.tsp_vers = TSPVERSION;
- bytenetorder(&msg);
- length = sizeof(struct sockaddr_in);
- if (sendto(sock, (char *)&msg, sizeof(struct tsp), 0,
- (struct sockaddr *)&dest, length) < 0) {
- perror("sendto");
- return;
- }
-
- tout.tv_sec = 5;
- tout.tv_usec = 0;
- FD_ZERO(&ready);
- FD_SET(sock, &ready);
- if (select(FD_SETSIZE, &ready, (fd_set *)0, (fd_set *)0, &tout)) {
- length = sizeof(struct sockaddr_in);
- cc = recvfrom(sock, (char *)&msg, sizeof(struct tsp), 0,
- (struct sockaddr *)&from, &length);
- if (cc < 0) {
- perror("recvfrom");
- return;
- }
- bytehostorder(&msg);
- if (msg.tsp_type == TSP_ACK)
- if (onflag)
- printf("timed tracing enabled\n");
- else
- printf("timed tracing disabled\n");
- else
- printf("wrong ack received: %s\n",
- tsptype[msg.tsp_type]);
- } else
- printf("communication error\n");
- }
-
- priv_resources()
- {
- int port;
- struct sockaddr_in sin;
-
- sock = socket(AF_INET, SOCK_DGRAM, 0);
- if (sock < 0) {
- perror("opening socket");
- return(-1);
- }
-
- sin.sin_family = AF_INET;
- sin.sin_addr.s_addr = 0;
- for (port = IPPORT_RESERVED - 1; port > IPPORT_RESERVED / 2; port--) {
- sin.sin_port = htons((u_short)port);
- if (bind(sock, (struct sockaddr *)&sin, sizeof (sin)) >= 0)
- break;
- if (errno != EADDRINUSE && errno != EADDRNOTAVAIL) {
- perror("bind");
- (void) close(sock);
- return(-1);
- }
- }
- if (port == IPPORT_RESERVED / 2) {
- fprintf(stderr, "all reserved ports in use\n");
- (void) close(sock);
- return(-1);
- }
-
- sock_raw = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP);
- if (sock_raw < 0) {
- perror("opening raw socket");
- (void) close(sock_raw);
- return(-1);
- }
- return(1);
- }
-