if (nreceived) { waittime = 2 * tmax / 1000000; if (!waittime) waittime = 1; } else waittime = maxwait;
char *pr_addr __P((in_addr_t));int check_icmph __P((struct ip *));void pr_icmph __P((struct icmp *));void pr_pack __P((char *, int, struct sockaddr_in *));void pr_retip __P((struct ip *));void usage();intmain(argc, argv)	int argc;	char **argv;{	extern int errno, optind;	extern char *optarg;	struct timeval timeout;	struct hostent *hp;	struct sockaddr_in *to;	struct protoent *proto;	struct in_addr saddr;	register int i;	int ch, hold = 1, packlen, preload;	int maxsize, maxsizelen, fdmasks;	u_char *datap, *packet;	char *target, hnamebuf[MAXHOSTNAMELEN];	u_char ttl = MAXTTL, loop = 1, df = 0;	int tos = 0;#ifdef IP_OPTIONS	char rspace[3 + 4 * NROUTES + 1];	/* record route space */#endif	fd_set *fdmaskp;	if (!(proto = getprotobyname("icmp")))		errx(1, "unknown protocol icmp");	if ((s = socket(AF_INET, SOCK_RAW, proto->p_proto)) < 0)		err(1, "socket");	/* revoke privs */	seteuid(getuid());	setuid(getuid());	preload = 0;	datap = &outpack[8 + sizeof(struct tvi)];	while ((ch = getopt(argc, argv, "DI:LRS:c:dfh:i:l:np:qrs:T:t:vw:")) != -1)		switch(ch) {		case 'c':			npackets = strtol(optarg, 0, NULL);			if (npackets <= 0)				errx(1, "bad number of packets to transmit: %s",				    optarg);			break;		case 'D':			options |= F_HDRINCL;			df = -1;			break;		case 'd':			options |= F_SO_DEBUG;			break;		case 'f':			if (getuid())				errx(1, "%s", strerror(EPERM));			options |= F_FLOOD;			setbuf(stdout, (char *)NULL);			break;		case 'I':		case 'S':	/* deprecated */			if (inet_aton(optarg, &saddr) == 0) {				if ((hp = gethostbyname(optarg)) == NULL)					errx(1, "bad interface address: %s",					     optarg);				memcpy(&saddr, hp->h_addr, sizeof(saddr));			}			options |= F_SADDR;			break;		case 'i':		/* wait between sending packets */			interval = strtol(optarg, NULL, 0);			if (interval <= 0)				errx(1, "bad timing interval: %s", optarg);			options |= F_INTERVAL;			break;		case 'L':			moptions |= MULTICAST_NOLOOP;			loop = 0;			break;		case 'l':			if (getuid())				errx(1, "%s", strerror(EPERM));			preload = strtol(optarg, NULL, 0);			if (preload < 0)				errx(1, "bad preload value: %s", optarg);			break;		case 'n':			options |= F_NUMERIC;			break;		case 'p':		/* fill buffer with user pattern */			options |= F_PINGFILLED;			fill((char *)datap, optarg);				break;		case 'q':			options |= F_QUIET;			break;		case 'R':			options |= F_RROUTE;			break;		case 'r':			options |= F_SO_DONTROUTE;			break;		case 's':		/* size of packet to send */			datalen = strtol(optarg, NULL, 0);			if (datalen <= 0)				errx(1, "bad packet size: %s", optarg);			if (datalen > MAXPACKET)				errx(1, "packet size too large: %s", optarg);			break;		case 'T':			options |= F_HDRINCL;			tos = strtoul(optarg, NULL, 0);			if (tos > 0xFF)				errx(1, "bad tos value: %s", optarg);			break;		case 't':			options |= F_TTL;			ttl = strtol(optarg, NULL, 0);			if (ttl <= 0)				errx(1, "bad ttl value: %s", optarg);			if (ttl > 255)				errx(1, "ttl value too large: %s", optarg);			break;		case 'v':			options |= F_VERBOSE;			break;		case 'w':			maxwait = strtol(optarg, NULL, 0);			if (maxwait <= 0)				errx(1, "bad maxwait value: %s", optarg);			break;		default:			usage();		}	argc -= optind;	argv += optind;	if (argc != 1)		usage();	target = *argv;	memset(&whereto, 0, sizeof(struct sockaddr));	to = (struct sockaddr_in *)&whereto;	to->sin_len = sizeof(struct sockaddr_in);	to->sin_family = AF_INET;	if (inet_aton(target, &to->sin_addr) != 0)		hostname = target;	else {		hp = gethostbyname(target);		if (!hp)			errx(1, "unknown host: %s", target);		to->sin_family = hp->h_addrtype;		memcpy(&to->sin_addr, hp->h_addr, hp->h_length);		(void)strncpy(hnamebuf, hp->h_name, sizeof(hnamebuf) - 1);		hnamebuf[sizeof(hnamebuf) - 1] = '\0';		hostname = hnamebuf;	}	if (options & F_FLOOD && options & F_INTERVAL)		errx(1, "-f and -i options are incompatible");	if (datalen >= sizeof(struct tvi))	/* can we time transfer */		timing = 1;	packlen = datalen + MAXIPLEN + MAXICMPLEN;	if (!(packet = (u_char *)malloc((u_int)packlen)))		err(1, "malloc");	if (!(options & F_PINGFILLED))		for (i = 8 + sizeof(struct tvi); i < datalen; ++i)			*datap++ = i;	ident = getpid() & 0xFFFF;	if (options & F_SADDR) {		if (IN_MULTICAST(ntohl(to->sin_addr.s_addr)))			moptions |= MULTICAST_IF;		else {			memset(&whence, 0, sizeof(whence));			whence.sin_len = sizeof(whence);			whence.sin_family = AF_INET;			memcpy(&whence.sin_addr.s_addr, &saddr, sizeof(saddr));			if (bind(s, (struct sockaddr*)&whence,			    sizeof(whence)) < 0)				err(1, "bind");		}	}	if (options & F_SO_DEBUG)		(void)setsockopt(s, SOL_SOCKET, SO_DEBUG, (char *)&hold,		    sizeof(hold));	if (options & F_SO_DONTROUTE)		(void)setsockopt(s, SOL_SOCKET, SO_DONTROUTE, (char *)&hold,		    sizeof(hold));	if (options & F_TTL) {		if (IN_MULTICAST(ntohl(to->sin_addr.s_addr))) 		    moptions |= MULTICAST_TTL;		else		    options |= F_HDRINCL;	}	if (options & F_RROUTE && options & F_HDRINCL)		errx(1, "-R option and -D or -T, or -t to unicast destinations"		     " are incompatible");	if (options & F_HDRINCL) {		struct ip *ip = (struct ip*)outpackhdr;		setsockopt(s, IPPROTO_IP, IP_HDRINCL, &hold, sizeof(hold));		ip->ip_v = IPVERSION;		ip->ip_hl = sizeof(struct ip) >> 2;		ip->ip_tos = tos;		ip->ip_id = 0;  		ip->ip_off = htons(df?IP_DF:0);		ip->ip_ttl = ttl;		ip->ip_p = proto->p_proto;		ip->ip_src.s_addr = INADDR_ANY;		ip->ip_dst = to->sin_addr;	}	/* record route option */	if (options & F_RROUTE) {		if (IN_MULTICAST(ntohl(to->sin_addr.s_addr)))			errx(1, "record route not valid to multicast destinations");#ifdef IP_OPTIONS		rspace[IPOPT_OPTVAL] = IPOPT_RR;		rspace[IPOPT_OLEN] = sizeof(rspace)-1;		rspace[IPOPT_OFFSET] = IPOPT_MINOFF;		if (setsockopt(s, IPPROTO_IP, IP_OPTIONS, rspace,		    sizeof(rspace)) < 0) {			perror("ping: record route");			exit(1);		}#else		errx(1, "record route not available in this implementation");#endif /* IP_OPTIONS */	}	if ((moptions & MULTICAST_NOLOOP) &&	    setsockopt(s, IPPROTO_IP, IP_MULTICAST_LOOP, &loop,		       sizeof(loop)) < 0)		err(1, "setsockopt IP_MULTICAST_LOOP");	if ((moptions & MULTICAST_TTL) &&	    setsockopt(s, IPPROTO_IP, IP_MULTICAST_TTL, &ttl,		       sizeof(ttl)) < 0)		err(1, "setsockopt IP_MULTICAST_TTL");	if ((moptions & MULTICAST_IF) &&	    setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, &saddr,		       sizeof(saddr)) < 0)		err(1, "setsockopt IP_MULTICAST_IF");	/* 	 * When trying to send large packets, you must increase the	 * size of both the send and receive buffers...	 */	maxsizelen = sizeof maxsize;	if (getsockopt(s, SOL_SOCKET, SO_SNDBUF, &maxsize, &maxsizelen) < 0)		err(1, "getsockopt");	if (maxsize < packlen &&	    setsockopt(s, SOL_SOCKET, SO_SNDBUF, &packlen, sizeof(maxsize)) < 0)		err(1, "setsockopt");	/*	 * When pinging the broadcast address, you can get a lot of answers.	 * Doing something so evil is useful if you are trying to stress the	 * ethernet, or just want to fill the arp cache to get some stuff for	 * /etc/ethers.	 */	(void)setsockopt(s, SOL_SOCKET, SO_RCVBUF, &packlen, sizeof(packlen));	if (to->sin_family == AF_INET)		(void)printf("PING %s (%s): %d data bytes\n", hostname,		    inet_ntoa(*(struct in_addr *)&to->sin_addr.s_addr),		    datalen);	else		(void)printf("PING %s: %d data bytes\n", hostname, datalen);	(void)signal(SIGINT, finish);	(void)signal(SIGALRM, catcher);#ifdef SIGINFO	(void)signal(SIGINFO, prtsig);#endif	while (preload--)		/* fire off them quickies */		pinger();	if ((options & F_FLOOD) == 0)		catcher();		/* start things going */	fdmasks = howmany(s+1, NFDBITS) * sizeof(fd_mask);	if ((fdmaskp = (fd_set *)malloc(fdmasks)) == NULL)		err(1, "malloc");	for (;;) {		struct sockaddr_in from;		register int cc;		int fromlen;		sigset_t omask, nmask;		if (options & F_FLOOD) {			pinger();			timeout.tv_sec = 0;			timeout.tv_usec = 10000;			memset(fdmaskp, 0, fdmasks);			FD_SET(s, fdmaskp);			if (select(s + 1, (fd_set *)fdmaskp, (fd_set *)NULL,			    (fd_set *)NULL, &timeout) < 1)				continue;		}		fromlen = sizeof(from);		if ((cc = recvfrom(s, (char *)packet, packlen, 0,		    (struct sockaddr *)&from, &fromlen)) < 0) {			if (errno == EINTR)				continue;			perror("ping: recvfrom");			continue;		}		sigemptyset(&nmask);		sigaddset(&nmask, SIGALRM);		sigprocmask(SIG_BLOCK, &nmask, &omask);		pr_pack((char *)packet, cc, &from);		sigprocmask(SIG_SETMASK, &omask, NULL);		if (npackets && nreceived >= npackets)			break;	}	free(fdmaskp);	finish();	/* NOTREACHED */	exit(0);	/* Make the compiler happy */}/* * catcher -- *	This routine causes another PING to be transmitted, and then * schedules another SIGALRM for 1 second from now. * * bug -- *	Our sense of time will slowly skew (i.e., packets will not be * launched exactly at 1-second intervals).  This does not affect the * quality of the delay and loss statistics. */voidcatcher(){	int waittime;	int save_errno = errno;	pinger();	(void)signal(SIGALRM, catcher);	if (!npackets || ntransmitted < npackets)		alarm((u_int)interval);	else {		if (nreceived) {			waittime = 2 * tmax / 1000000;			if (!waittime)				waittime = 1;		} else			waittime = maxwait;		(void)signal(SIGALRM, finish);		(void)alarm((u_int)waittime);	}	errno = save_errno;}/* * Print statistics when SIGINFO is received. */voidprtsig(){	int save_errno = errno;	summary(0);	errno = save_errno;}/* * pinger -- *	Compose and transmit an ICMP ECHO REQUEST packet.  The IP packet * will be added on by the kernel.  The ID field is our UNIX process ID, * and the sequence number is an ascending integer.  The first 8 bytes * of the data portion are used to hold a UNIX "timeval" struct in VAX * byte-order, to compute the round-trip time. */voidpinger(){	register struct icmp *icp;	register int cc;	int i;	char *packet = outpack;	icp = (struct icmp *)outpack;	icp->icmp_type = ICMP_ECHO;	icp->icmp_code = 0;	icp->icmp_cksum = 0;	icp->icmp_seq = htons(ntransmitted++);	icp->icmp_id = ident;			/* ID */	CLR(ntohs(icp->icmp_seq) % mx_dup_ck);	if (timing) {		struct timeval tv;		struct tvi tvi;		(void)gettimeofday(&tv, (struct timezone *)NULL);		tvi.tv_sec = htonl(tv.tv_sec);		tvi.tv_usec = htonl(tv.tv_usec);		memcpy((u_int *)&outpack[8], &tvi, sizeof tvi);	}	cc = datalen + 8;			/* skips ICMP portion */	/* compute ICMP checksum here */	icp->icmp_cksum = in_cksum((u_short *)icp, cc);	if (options & F_HDRINCL) {		struct ip *ip = (struct ip*)outpackhdr;		packet = (char*)ip;		cc += sizeof(struct ip);		ip->ip_len = htons(cc);		ip->ip_sum = in_cksum((u_short *)outpackhdr, cc);	}	i = sendto(s, (char *)packet, cc, 0, &whereto,		   sizeof(struct sockaddr));	if (i < 0 || i != cc)  {		if (i < 0)			perror("ping: sendto");		(void)printf("ping: wrote %s %d chars, ret=%d\n",		    hostname, cc, i);	}	if (!(options & F_QUIET) && options & F_FLOOD)		(void)write(STDOUT_FILENO, &DOT, 1);}/* * pr_pack -- *	Print out the packet, if it came from us.  This logic is necessary * because ALL readers of the ICMP socket get a copy of ALL ICMP packets * which arrive ('tis only fair).  This permits multiple copies of this * program to be run without having intermingled output (or statistics!). */voidpr_pack(buf, cc, from)	char *buf;	int cc;	struct sockaddr_in *from;{	register struct icmp *icp;	register in_addr_t l;	register u_int i, j;	register u_char *cp, *dp;	static int old_rrlen;	static char old_rr[MAX_IPOPTLEN];	struct ip *ip, *ip2;	struct timeval tv, tp;	char *pkttime;	quad_t triptime = 0;	int hlen, hlen2, dupflag;	(void)gettimeofday(&tv, (struct timezone *)NULL);	/* Check the IP header */	ip = (struct ip *)buf;	hlen = ip->ip_hl << 2;	if (cc < hlen + ICMP_MINLEN) {		if (options & F_VERBOSE)			warnx("packet too short (%d bytes) from %s", cc,			  inet_ntoa(*(struct in_addr *)&from->sin_addr.s_addr));		return;	}	/* Now the ICMP part */	cc -= hlen;	icp = (struct icmp *)(buf + hlen);	if (icp->icmp_type == ICMP_ECHOREPLY) {		if (icp->icmp_id != ident)			return;			/* 'Twas not our ECHO */		++nreceived;		if (timing) {			struct tvi tvi;#ifndef icmp_data			pkttime = (char *)&icp->icmp_ip;#else			pkttime = (char *)icp->icmp_data;#endif			memcpy(&tvi, pkttime, sizeof tvi);			tp.tv_sec = ntohl(tvi.tv_sec);			tp.tv_usec = ntohl(tvi.tv_usec);						timersub(&tv, &tp, &tv);			triptime = (tv.tv_sec * 1000000) + tv.tv_usec;			tsum += triptime;			if (triptime < tmin)				tmin = triptime;			if (triptime > tmax)				tmax = triptime;		}		if (TST(ntohs(icp->icmp_seq) % mx_dup_ck)) {			++nrepeats;			--nreceived;			dupflag = 1;		} else {			SET(ntohs(icp->icmp_seq) % mx_dup_ck);			dupflag = 0;		}		if (options & F_QUIET)			return;		if (options & F_FLOOD)			(void)write(STDOUT_FILENO, &BSPACE, 1);		else {			(void)printf("%d bytes from %s: icmp_seq=%u", cc,			   inet_ntoa(*(struct in_addr *)&from->sin_addr.s_addr),			   ntohs(icp->icmp_seq));			(void)printf(" ttl=%d", ip->ip_ttl);			if (timing)				(void)printf(" time=%d.%03d ms",				    (int)(triptime / 1000),				    (int)(triptime % 1000));			if (dupflag)				(void)printf(" (DUP!)");			/* check the data */			cp = (u_char*)&icp->icmp_data[sizeof(struct tvi)];			dp = &outpack[8 + sizeof(struct tvi)];			for (i = 8 + sizeof(struct tvi); i < datalen;			    ++i, ++cp, ++dp) {				if (*cp != *dp) {	(void)printf("\nwrong data byte #%d should be 0x%x but was 0x%x",	    i, *dp, *cp);					cp = (u_char*)&icp->icmp_data[0];					for (i = 8; i < datalen; ++i, ++cp) {						if ((i % 32) == 8)							(void)printf("\n\t");						(void)printf("%x ", *cp);					}					break;				}			}		}	} else {		/* We've got something other than an ECHOREPLY */		if (!(options & F_VERBOSE))			return;		ip2 = (struct ip *) (buf + hlen + sizeof (struct icmp));		hlen2 = ip2->ip_hl << 2; 		if (cc >= hlen2 + 8 && check_icmph((struct ip *)(icp +		    sizeof (struct icmp))) != 1)			return;		(void)printf("%d bytes from %s: ", cc,		    pr_addr(from->sin_addr.s_addr));		pr_icmph(icp);	}	/* Display any IP options */	cp = (u_char *)buf + sizeof(struct ip);	for (; hlen > (int)sizeof(struct ip); --hlen, ++cp)		switch (*cp) {		case IPOPT_EOL:			hlen = 0;			break;		case IPOPT_LSRR:			(void)printf("\nLSRR: ");			hlen -= 2;			j = *++cp;			++cp;			i = 0;			if (j > IPOPT_MINOFF) {				for (;;) {					l = *++cp;					l = (l<<8) + *++cp;					l = (l<<8) + *++cp;					l = (l<<8) + *++cp;					if (l == 0)						(void)printf("\t0.0.0.0");					else						(void)printf("\t%s",						    pr_addr(ntohl(l)));					hlen -= 4;					j -= 4;					i += 4;					if (j <= IPOPT_MINOFF)						break;					if (i >= MAX_IPOPTLEN) {						(void)printf("\t(truncated route)");						break;					}					(void)putchar('\n');				}			}			break;		case IPOPT_RR:			j = *++cp;		/* get length */			i = *++cp;		/* and pointer */			hlen -= 2;			if (i > j)				i = j;			i -= IPOPT_MINOFF;			if (i <= 0)				continue;			if (i == old_rrlen			    && cp == (u_char *)buf + sizeof(struct ip) + 2			    && !memcmp(cp, old_rr, i)			    && !(options & F_FLOOD)) {				(void)printf("\t(same route)");				i = ((i + 3) / 4) * 4;				hlen -= i;				cp += i;				break;			}			if (i < MAX_IPOPTLEN) {				old_rrlen = i;				memcpy(old_rr, cp, i);			} else				old_rrlen = 0;			(void)printf("\nRR: ");			j = 0;			for (;;) {				l = *++cp;				l = (l<<8) + *++cp;				l = (l<<8) + *++cp;				l = (l<<8) + *++cp;				if (l == 0)					(void)printf("\t0.0.0.0");				else					(void)printf("\t%s", pr_addr(ntohl(l)));				hlen -= 4;				i -= 4;				j += 4;				if (i <= 0)					break;				if (j >= MAX_IPOPTLEN) {					(void)printf("\t(truncated route)");					break;				}				(void)putchar('\n');			}			break;		case IPOPT_NOP:			(void)printf("\nNOP");			break;		default:			(void)printf("\nunknown option %x", *cp);			hlen = hlen + cp[1] - 1;			cp = cp + cp[1] - 1;			break;		}	if (!(options & F_FLOOD)) {		(void)putchar('\n');		(void)fflush(stdout);	}}/* * in_cksum -- *	Checksum routine for Internet Protocol family headers (C Version) */intin_cksum(addr, len)	u_short *addr;	int len;{	register int nleft = len;	register u_short *w = addr;	register int sum = 0;	u_short answer = 0;	/*	 * Our algorithm is simple, using a 32 bit accumulator (sum), we add	 * sequential 16 bit words to it, and at the end, fold back all the	 * carry bits from the top 16 bits into the lower 16 bits.	 */	while (nleft > 1)  {		sum += *w++;		nleft -= 2;	}	/* mop up an odd byte, if necessary */	if (nleft == 1) {		*(u_char *)(&answer) = *(u_char *)w ;		sum += answer;	}	/* add back carry outs from top 16 bits to low 16 bits */	sum = (sum >> 16) + (sum & 0xffff);	/* add hi 16 to low 16 */	sum += (sum >> 16);			/* add carry */	answer = ~sum;				/* truncate to 16 bits */	return(answer);}voidsummary(header)	int header;{	quad_t	i;	(void)putchar('\r');	(void)fflush(stdout);	if (header)		(void)printf("--- %s ping statistics ---\n", hostname);	(void)printf("%ld packets transmitted, ", ntransmitted);	(void)printf("%ld packets received, ", nreceived);	if (nrepeats)		(void)printf("+%ld duplicates, ", nrepeats);	if (ntransmitted) {		if (nreceived > ntransmitted)			(void)printf("-- somebody's printing up packets!");		else			(void)printf("%d%% packet loss",			    (int) (((ntransmitted - nreceived) * 100) /			    ntransmitted));	}	(void)putchar('\n');	if (nreceived && timing) {		/* Only display average to milliseconds */		i = tsum / (nreceived + nrepeats);		(void)printf("round-trip min/avg/max = %d.%03d/%d.%03d/%d.%03d ms\n",		    (int)(tmin / 1000), (int)(tmin % 1000),		    (int)(i / 1000), (int)(i % 1000),		    (int)(tmax / 1000), (int)(tmax % 1000));	}}/* * finish -- *	Print out statistics, and give up. */voidfinish(){	(void)signal(SIGINT, SIG_IGN);	summary(1);	exit(nreceived ? 0 : 1);}#ifdef notdefstatic char *ttab[] = {	"Echo Reply",		/* ip + seq + udata */	"Dest Unreachable",	/* net, host, proto, port, frag, sr + IP */	"Source Quench",	/* IP */	"Redirect",		/* redirect type, gateway, + IP  */	"Echo",	"Time Exceeded",	/* transit, frag reassem + IP */	"Parameter Problem",	/* pointer + IP */	"Timestamp",		/* id + seq + three timestamps */	"Timestamp Reply",	/* " */	"Info Request",		/* id + sq */	"Info Reply"		/* " */};#endif/* * pr_icmph -- *	Print a descriptive string about an ICMP header. */voidpr_icmph(icp)	struct icmp *icp;{	switch(icp->icmp_type) {	case ICMP_ECHOREPLY:		(void)printf("Echo Reply\n");		/* XXX ID + Seq + Data */		break;	case ICMP_UNREACH:		switch(icp->icmp_code) {		case ICMP_UNREACH_NET:			(void)printf("Destination Net Unreachable\n");			break;		case ICMP_UNREACH_HOST:			(void)printf("Destination Host Unreachable\n");			break;		case ICMP_UNREACH_PROTOCOL:			(void)printf("Destination Protocol Unreachable\n");			break;		case ICMP_UNREACH_PORT:			(void)printf("Destination Port Unreachable\n");			break;		case ICMP_UNREACH_NEEDFRAG:			if (icp->icmp_nextmtu != 0)				(void)printf("frag needed and DF set (MTU %d)\n",					ntohs(icp->icmp_nextmtu));			else 				(void)printf("frag needed and DF set\n");			break;		case ICMP_UNREACH_SRCFAIL:			(void)printf("Source Route Failed\n");			break;		case ICMP_UNREACH_NET_UNKNOWN:			(void)printf("Network Unknown\n");			break;		case ICMP_UNREACH_HOST_UNKNOWN:			(void)printf("Host Unknown\n");			break;		case ICMP_UNREACH_ISOLATED:			(void)printf("Source Isolated\n");			break;		case ICMP_UNREACH_NET_PROHIB:			(void)printf("Dest. Net Administratively Prohibited\n");			break;		case ICMP_UNREACH_HOST_PROHIB:			(void)printf("Dest. Host Administratively Prohibited\n");			break;		case ICMP_UNREACH_TOSNET:			(void)printf("Destination Net Unreachable for TOS\n");			break;		case ICMP_UNREACH_TOSHOST:			(void)printf("Desination Host Unreachable for TOS\n");			break;		case ICMP_UNREACH_FILTER_PROHIB:			(void)printf("Route administratively prohibited\n");			break;		case ICMP_UNREACH_HOST_PRECEDENCE:			(void)printf("Host Precedence Violation\n");			break;		case ICMP_UNREACH_PRECEDENCE_CUTOFF:			(void)printf("Precedence Cutoff\n");			break;		default:			(void)printf("Dest Unreachable, Unknown Code: %d\n",			    icp->icmp_code);			break;		}		/* Print returned IP header information */#ifndef icmp_data		pr_retip(&icp->icmp_ip);#else		pr_retip((struct ip *)icp->icmp_data);#endif		break;	case ICMP_SOURCEQUENCH:		(void)printf("Source Quench\n");#ifndef icmp_data		pr_retip(&icp->icmp_ip);#else		pr_retip((struct ip *)icp->icmp_data);#endif		break;	case ICMP_REDIRECT:		switch(icp->icmp_code) {		case ICMP_REDIRECT_NET:			(void)printf("Redirect Network");			break;		case ICMP_REDIRECT_HOST:			(void)printf("Redirect Host");			break;		case ICMP_REDIRECT_TOSNET:			(void)printf("Redirect Type of Service and Network");			break;		case ICMP_REDIRECT_TOSHOST:			(void)printf("Redirect Type of Service and Host");			break;		default:			(void)printf("Redirect, Unknown Code: %d", icp->icmp_code);			break;		}		(void)printf("(New addr: %s)\n",		    inet_ntoa(icp->icmp_gwaddr));#ifndef icmp_data		pr_retip(&icp->icmp_ip);#else		pr_retip((struct ip *)icp->icmp_data);#endif		break;	case ICMP_ECHO:		(void)printf("Echo Request\n");		/* XXX ID + Seq + Data */		break;	case ICMP_ROUTERADVERT:		/* RFC1256 */		(void)printf("Router Discovery Advertisement\n");		(void)printf("(%d entries, lifetime %d seconds)\n",		    icp->icmp_num_addrs, ntohs(icp->icmp_lifetime));		break;	case ICMP_ROUTERSOLICIT:		/* RFC1256 */		(void)printf("Router Discovery Solicitation\n");		break;	case ICMP_TIMXCEED:		switch(icp->icmp_code) {		case ICMP_TIMXCEED_INTRANS:			(void)printf("Time to live exceeded\n");			break;		case ICMP_TIMXCEED_REASS:			(void)printf("Frag reassembly time exceeded\n");			break;		default:			(void)printf("Time exceeded, Unknown Code: %d\n",			    icp->icmp_code);			break;		}#ifndef icmp_data		pr_retip(&icp->icmp_ip);#else		pr_retip((struct ip *)icp->icmp_data);#endif		break;	case ICMP_PARAMPROB:		switch(icp->icmp_code) {		case ICMP_PARAMPROB_OPTABSENT:			(void)printf(			    "Parameter problem, required option absent: pointer = 0x%02x\n",			    ntohs(icp->icmp_hun.ih_pptr));			break;		default:			(void)printf("Parameter problem: pointer = 0x%02x\n",			    ntohs(icp->icmp_hun.ih_pptr));			break;		}#ifndef icmp_data		pr_retip(&icp->icmp_ip);#else		pr_retip((struct ip *)icp->icmp_data);#endif		break;	case ICMP_TSTAMP:		(void)printf("Timestamp\n");		/* XXX ID + Seq + 3 timestamps */		break;	case ICMP_TSTAMPREPLY:		(void)printf("Timestamp Reply\n");		/* XXX ID + Seq + 3 timestamps */		break;	case ICMP_IREQ:		(void)printf("Information Request\n");		/* XXX ID + Seq */		break;	case ICMP_IREQREPLY:		(void)printf("Information Reply\n");		/* XXX ID + Seq */		break;#ifdef ICMP_MASKREQ	case ICMP_MASKREQ:		(void)printf("Address Mask Request\n");		break;#endif#ifdef ICMP_MASKREPLY	case ICMP_MASKREPLY:		(void)printf("Address Mask Reply (Mask 0x%08x)\n",		    ntohl(icp->icmp_mask));		break;#endif	default:		(void)printf("Unknown ICMP type: %d\n", icp->icmp_type);	}}/* * pr_iph -- *	Print an IP header with options. */voidpr_iph(ip)	struct ip *ip;{	int hlen;	u_char *cp;	hlen = ip->ip_hl << 2;	cp = (u_char *)ip + 20;		/* point to options */	(void)printf("Vr HL TOS  Len   ID Flg  off TTL Pro  cks      Src      Dst Data\n");	(void)printf(" %1x  %1x  %02x %04x %04x",	    ip->ip_v, ip->ip_hl, ip->ip_tos, ip->ip_len, ip->ip_id);	(void)printf("   %1x %04x", ((ip->ip_off) & 0xe000) >> 13,	    (ip->ip_off) & 0x1fff);	(void)printf("  %02x  %02x %04x", ip->ip_ttl, ip->ip_p, ip->ip_sum);	(void)printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->ip_src.s_addr));	(void)printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->ip_dst.s_addr));	/* dump and option bytes */	while (hlen-- > 20) {		(void)printf("%02x", *cp++);	}	(void)putchar('\n');}/* * pr_addr -- *	Return an ascii host address as a dotted quad and optionally with * a hostname. */char *pr_addr(a)	in_addr_t a;{	struct hostent *hp;	struct in_addr in;	static char buf[16+3+MAXHOSTNAMELEN];	in.s_addr = a;	if ((options & F_NUMERIC) ||	    !(hp = gethostbyaddr((char *)&in.s_addr, sizeof(in.s_addr), AF_INET)))		(void)snprintf(buf, sizeof buf, "%s", inet_ntoa(in));	else		(void)snprintf(buf, sizeof buf, "%s (%s)", hp->h_name,		    inet_ntoa(in));	return(buf);}