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NetBSD/sbin/ping6/ping6.c

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/* $NetBSD: ping6.c,v 1.6 1999/07/04 02:46:28 itojun Exp $ */
/*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
* 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. Neither the name of the project 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 PROJECT 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 PROJECT 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.
*/
/* BSDI ping.c,v 2.3 1996/01/21 17:56:50 jch Exp */
/*
* Copyright (c) 1989, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Mike Muuss.
*
* 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.
*/
#if 0
#ifndef lint
static char copyright[] =
"@(#) Copyright (c) 1989, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
static char sccsid[] = "@(#)ping.c 8.1 (Berkeley) 6/5/93";
#endif /* not lint */
#else
#include <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD");
#endif
#endif
/*
* Using the InterNet Control Message Protocol (ICMP) "ECHO" facility,
* measure round-trip-delays and packet loss across network paths.
*
* Author -
* Mike Muuss
* U. S. Army Ballistic Research Laboratory
* December, 1983
*
* Status -
* Public Domain. Distribution Unlimited.
* Bugs -
* More statistics could always be gathered.
* This program has to run SUID to ROOT to access the ICMP socket.
*/
#include <sys/param.h>
#include <sys/uio.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <net/if.h>
#include <net/route.h>
#include <netinet/in_systm.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/ip_var.h>
#include <netinet/ip6.h>
#include <netinet/icmp6.h>
#include <netinet6/ah.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#ifdef IPSEC
#include <netinet6/ipsec.h>
#endif
#define MAXPACKETLEN 131072
#define IP6LEN 40
#define ICMP6ECHOLEN 8 /* icmp echo header len excluding time */
#define ICMP6ECHOTMLEN sizeof(struct timeval)
#define ICMP6_NIQLEN (ICMP6ECHOLEN + 8)
#define ICMP6_NIRLEN (ICMP6ECHOLEN + 12) /* 64 bits of nonce + 32 bits ttl */
#define EXTRA 256 /* for AH and various other headers. weird. */
#define DEFDATALEN ICMP6ECHOTMLEN
#define MAXDATALEN MAXPACKETLEN - IP6LEN - ICMP6ECHOLEN
#define NROUTES 9 /* number of record route slots */
#define A(bit) rcvd_tbl[(bit)>>3] /* identify byte in array */
#define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */
#define SET(bit) (A(bit) |= B(bit))
#define CLR(bit) (A(bit) &= (~B(bit)))
#define TST(bit) (A(bit) & B(bit))
#define F_FLOOD 0x0001
#define F_INTERVAL 0x0002
#define F_NUMERIC 0x0004
#define F_PINGFILLED 0x0008
#define F_QUIET 0x0010
#define F_RROUTE 0x0020
#define F_SO_DEBUG 0x0040
#define F_VERBOSE 0x0100
#ifdef IPSEC
#ifdef IPSEC_POLICY_IPSEC
#define F_POLICY 0x4000
#else
#define F_AUTHHDR 0x0200
#define F_ENCRYPT 0x0400
#endif /*IPSEC_POLICY_IPSEC*/
#endif /*IPSEC*/
#define F_NODEADDR 0x0800
#define F_FQDN 0x1000
#define F_INTERFACE 0x2000
u_int options;
#define IN6LEN sizeof(struct in6_addr)
#define SA6LEN sizeof(struct sockaddr_in6)
#define DUMMY_PORT 10101
#define SIN6(s) ((struct sockaddr_in6 *)(s))
/*
* MAX_DUP_CHK is the number of bits in received table, i.e. the maximum
* number of received sequence numbers we can keep track of. Change 128
* to 8192 for complete accuracy...
*/
#define MAX_DUP_CHK (8 * 8192)
int mx_dup_ck = MAX_DUP_CHK;
char rcvd_tbl[MAX_DUP_CHK / 8];
struct addrinfo *res;
struct sockaddr_in6 dst; /* who to ping6 */
struct sockaddr_in6 src; /* src addr of this packet */
int datalen = DEFDATALEN;
int s; /* socket file descriptor */
u_char outpack[MAXPACKETLEN];
char BSPACE = '\b'; /* characters written for flood */
char DOT = '.';
char *hostname;
int ident; /* process id to identify our packets */
/* counters */
long npackets; /* max packets to transmit */
long nreceived; /* # of packets we got back */
long nrepeats; /* number of duplicates */
long ntransmitted; /* sequence # for outbound packets = #sent */
int interval = 1; /* interval between packets */
int hoplimit = -1; /* hoplimit */
/* timing */
int timing; /* flag to do timing */
double tmin = 999999999.0; /* minimum round trip time */
double tmax = 0.0; /* maximum round trip time */
double tsum = 0.0; /* sum of all times, for doing average */
/* for inet_ntop() */
char ntop_buf[INET6_ADDRSTRLEN];
/* for node addresses */
u_short naflags;
/* for ancillary data(advanced API) */
struct msghdr smsghdr;
struct iovec smsgiov;
char *scmsg = 0;
int main __P((int, char *[]));
void fill __P((char *, char *));
int get_hoplim __P((struct msghdr *));
void onalrm __P((int));
void oninfo __P((int));
void onint __P((int));
void pinger __P((void));
char *pr_addr __P((struct in6_addr *));
void pr_icmph __P((struct icmp6_hdr *, u_char *));
void pr_iph __P((struct ip6_hdr *));
void pr_nodeaddr __P((struct icmp6_nodeinfo *, int));
void pr_pack __P((u_char *, int, struct msghdr *));
void pr_retip __P((struct ip6_hdr *, u_char *));
void summary __P((void));
void tvsub __P((struct timeval *, struct timeval *));
void usage __P((void));
int
main(argc, argv)
int argc;
char *argv[];
{
extern int errno, optind;
extern char *optarg;
struct itimerval itimer;
struct sockaddr_in6 from;
struct timeval timeout;
struct addrinfo hints;
fd_set fdset;
register int cc, i;
int ch, fromlen, hold, packlen, preload, optval, ret_ga;
u_char *datap, *packet;
char *e, *target, *ifname = NULL;
int ip6optlen = 0;
struct cmsghdr *scmsgp = NULL;
int sockbufsize = 0;
#ifdef IPSEC_POLICY_IPSEC
char *policy = NULL;
#endif
/* just to be sure */
memset(&smsghdr, 0, sizeof(&smsghdr));
memset(&smsgiov, 0, sizeof(&smsgiov));
preload = 0;
datap = &outpack[ICMP6ECHOLEN + ICMP6ECHOTMLEN];
#ifndef IPSEC
while ((ch = getopt(argc, argv, "a:b:c:dfh:I:i:l:np:qRrs:vwW")) != EOF)
#else
#ifdef IPSEC_POLICY_IPSEC
while ((ch = getopt(argc, argv, "a:b:c:dfh:I:i:l:np:qRrs:vwWP:")) != EOF)
#else
while ((ch = getopt(argc, argv, "a:b:c:dfh:I:i:l:np:qRrs:vwWAE")) != EOF)
#endif /*IPSEC_POLICY_IPSEC*/
#endif
switch(ch) {
case 'a':
{
u_char *cp;
options |= F_NODEADDR;
datalen = 2048; /* XXX: enough? */
for (cp = optarg; *cp != '\0'; cp++) {
switch(*cp) {
case 'a':
case 'A':
naflags |= NI_NODEADDR_FLAG_ALL;
break;
case 'l':
case 'L':
naflags |= NI_NODEADDR_FLAG_LINKLOCAL;
break;
case 's':
case 'S':
naflags |= NI_NODEADDR_FLAG_SITELOCAL;
break;
case 'g':
case 'G':
naflags |= NI_NODEADDR_FLAG_GLOBAL;
break;
default:
usage();
}
}
break;
}
case 'b':
#if defined(SO_SNDBUF) && defined(SO_RCVBUF)
sockbufsize = atoi(optarg);
#else
err(1,
"-b option ignored: SO_SNDBUF/SO_RCVBUF socket options not supported");
#endif
break;
case 'c':
npackets = strtol(optarg, &e, 10);
if (npackets <= 0 || *optarg == '\0' || *e != '\0')
errx(1,
"illegal number of packets -- %s", optarg);
break;
case 'd':
options |= F_SO_DEBUG;
break;
case 'f':
if (getuid()) {
errno = EPERM;
errx(1, "Must be superuser to flood ping");
}
options |= F_FLOOD;
setbuf(stdout, (char *)NULL);
break;
case 'h': /* hoplimit */
hoplimit = strtol(optarg, &e, 10);
if (255 < hoplimit || hoplimit < -1)
errx(1,
"illegal hoplimit -- %s", optarg);
break;
case 'I':
ifname = optarg;
options |= F_INTERFACE;
break;
case 'i': /* wait between sending packets */
interval = strtol(optarg, &e, 10);
if (interval <= 0 || *optarg == '\0' || *e != '\0')
errx(1,
"illegal timing interval -- %s", optarg);
options |= F_INTERVAL;
break;
case 'l':
preload = strtol(optarg, &e, 10);
if (preload < 0 || *optarg == '\0' || *e != '\0')
errx(1, "illegal 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 's': /* size of packet to send */
datalen = strtol(optarg, &e, 10);
if (datalen <= 0 || *optarg == '\0' || *e != '\0')
errx(1, "illegal datalen value -- %s", optarg);
if (datalen > MAXDATALEN)
errx(1,
"datalen value too large, maximum is %d",
MAXDATALEN);
break;
case 'v':
options |= F_VERBOSE;
break;
case 'w':
case 'W':
options |= F_FQDN;
break;
#ifdef IPSEC
#ifdef IPSEC_POLICY_IPSEC
case 'P':
options |= F_POLICY;
policy = strdup(optarg);
break;
#else
case 'A':
options |= F_AUTHHDR;
break;
case 'E':
options |= F_ENCRYPT;
break;
#endif /*IPSEC_POLICY_IPSEC*/
#endif /*IPSEC*/
default:
usage();
}
argc -= optind;
argv += optind;
if (argc < 1)
usage();
if (argc > 1)
ip6optlen += inet6_rthdr_space(IPV6_RTHDR_TYPE_0, argc - 1);
target = argv[argc - 1];
/* getaddrinfo */
bzero(&hints, sizeof(struct addrinfo));
if ((options & F_NUMERIC) == 0)
hints.ai_flags = AI_CANONNAME;
hints.ai_family = AF_INET6;
hints.ai_socktype = SOCK_RAW;
hints.ai_protocol = IPPROTO_ICMPV6;
ret_ga = getaddrinfo(target, NULL, &hints, &res);
if (ret_ga) {
fprintf(stderr, "ping6: %s\n", gai_strerror(ret_ga));
exit(1);
}
if (res->ai_canonname)
hostname = res->ai_canonname;
else
hostname = target;
if (!res->ai_addr)
errx(1, "getaddrinfo failed");
(void)memcpy(&dst, res->ai_addr, res->ai_addrlen);
if (options & F_FLOOD && options & F_INTERVAL)
errx(1, "-f and -i incompatible options");
if (datalen >= sizeof(struct timeval)) /* can we time transfer */
timing = 1;
packlen = datalen + IP6LEN + ICMP6ECHOLEN + EXTRA;
if (!(packet = (u_char *)malloc((u_int)packlen)))
err(1, "Unable to allocate packet");
if (!(options & F_PINGFILLED))
for (i = 8; i < datalen; ++i)
*datap++ = i;
ident = getpid() & 0xFFFF;
if ((s = socket(res->ai_family, res->ai_socktype, res->ai_protocol)) < 0)
err(1, "socket");
hold = 1;
if (options & F_SO_DEBUG)
(void)setsockopt(s, SOL_SOCKET, SO_DEBUG, (char *)&hold,
sizeof(hold));
optval = IPV6_DEFHLIM;
if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr))
if (setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
&optval, sizeof(optval)) == -1)
err(1, "IPV6_MULTICAST_HOPS");
#ifdef IPSEC
#ifdef IPSEC_POLICY_IPSEC
if (options & F_POLICY) {
int len;
char *buf;
if ((len = ipsec_get_policylen(policy)) < 0)
errx(1, ipsec_strerror());
if ((buf = malloc(len)) == NULL)
err(1, "malloc");
if ((len = ipsec_set_policy(buf, len, policy)) < 0)
errx(1, ipsec_strerror());
if (setsockopt(s, IPPROTO_IPV6, IPV6_IPSEC_POLICY, buf, len) < 0)
warnx("Unable to set IPSec policy");
free(buf);
}
#else
if (options & F_AUTHHDR) {
optval = IPSEC_LEVEL_REQUIRE;
#ifdef IPV6_AUTH_TRANS_LEVEL
if (setsockopt(s, IPPROTO_IPV6, IPV6_AUTH_TRANS_LEVEL,
&optval, sizeof(optval)) == -1)
err(1, "setsockopt(IPV6_AUTH_TRANS_LEVEL)");
#else /* old def */
if (setsockopt(s, IPPROTO_IPV6, IPV6_AUTH_LEVEL,
&optval, sizeof(optval)) == -1)
err(1, "setsockopt(IPV6_AUTH_LEVEL)");
#endif
}
if (options & F_ENCRYPT) {
optval = IPSEC_LEVEL_REQUIRE;
if (setsockopt(s, IPPROTO_IPV6, IPV6_ESP_TRANS_LEVEL,
&optval, sizeof(optval)) == -1)
err(1, "setsockopt(IPV6_ESP_TRANS_LEVEL)");
}
#endif /*IPSEC_POLICY_IPSEC*/
#endif
#ifdef ICMP6_FILTER
{
struct icmp6_filter filt;
if (!(options & F_VERBOSE)) {
ICMP6_FILTER_SETBLOCKALL(&filt);
if ((options & F_FQDN) || (options & F_NODEADDR))
ICMP6_FILTER_SETPASS(ICMP6_NI_REPLY, &filt);
else
ICMP6_FILTER_SETPASS(ICMP6_ECHO_REPLY, &filt);
} else {
ICMP6_FILTER_SETPASSALL(&filt);
}
if (setsockopt(s, IPPROTO_ICMPV6, ICMP6_FILTER, &filt,
sizeof(filt)) < 0)
err(1, "setsockopt(ICMP6_FILTER)");
}
#endif /*ICMP6_FILTER*/
/*
optval = 1;
if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr))
if (setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
&optval, sizeof(optval)) == -1)
err(1, "IPV6_MULTICAST_LOOP");
*/
/* record route option */
if (options & F_RROUTE)
errx(1, "record route not available in this implementation");
/* Outgoing interface */
#ifndef SIN6_IFINDEX
if (options & F_INTERFACE)
ip6optlen += CMSG_SPACE(sizeof(struct in6_pktinfo));
#endif
if (hoplimit != -1)
ip6optlen += CMSG_SPACE(sizeof(int));
/* set IP6 packet options */
if (ip6optlen) {
if ((scmsg = (char *)malloc(ip6optlen)) == 0)
errx(1, "can't allocate enough memory");
smsghdr.msg_control = (caddr_t)scmsg;
smsghdr.msg_controllen = ip6optlen;
scmsgp = (struct cmsghdr *)scmsg;
}
if (options & F_INTERFACE) {
#ifndef SIN6_IFINDEX
struct in6_pktinfo *pktinfo =
(struct in6_pktinfo *)(CMSG_DATA(scmsgp));
if ((pktinfo->ipi6_ifindex = if_nametoindex(ifname)) == 0)
errx(1, "%s: invalid interface name", ifname);
bzero(&pktinfo->ipi6_addr, sizeof(struct in6_addr));
scmsgp->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo));
scmsgp->cmsg_level = IPPROTO_IPV6;
scmsgp->cmsg_type = IPV6_PKTINFO;
scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp);
#else
if ((dst.sin6_ifindex = if_nametoindex(ifname)) == 0)
errx(1, "%s: invalid interface name", ifname);
#endif
}
if (hoplimit != -1) {
scmsgp->cmsg_len = CMSG_LEN(sizeof(int));
scmsgp->cmsg_level = IPPROTO_IPV6;
scmsgp->cmsg_type = IPV6_HOPLIMIT;
*(int *)(CMSG_DATA(scmsgp)) = hoplimit;
scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp);
}
if (argc > 1) { /* some intermediate addrs are specified */
int hops, error;
if ((scmsgp = (struct cmsghdr *)inet6_rthdr_init(scmsgp,
IPV6_RTHDR_TYPE_0)) == 0)
errx(1, "can't initialize rthdr");
for (hops = 0; hops < argc - 1; hops++) {
struct addrinfo *iaip;
if ((error = getaddrinfo(argv[hops], NULL, &hints, &iaip)))
errx(1, gai_strerror(error));
if (SIN6(res->ai_addr)->sin6_family != AF_INET6)
errx(1,
"bad addr family of an intermediate addr");
if (inet6_rthdr_add(scmsgp,
&(SIN6(iaip->ai_addr))->sin6_addr,
IPV6_RTHDR_LOOSE))
errx(1, "can't add an intermediate node");
}
if (inet6_rthdr_lasthop(scmsgp, IPV6_RTHDR_LOOSE))
errx(1, "can't set the last flag");
scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp);
}
{
/*
* source selection
*/
int dummy, len = sizeof(src);
if ((dummy = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
err(1, "UDP socket");
src.sin6_family = AF_INET6;
src.sin6_addr = dst.sin6_addr;
src.sin6_port = ntohs(DUMMY_PORT);
#ifndef SIN6_IFINDEX
if (setsockopt(dummy, IPPROTO_IPV6, IPV6_PKTOPTIONS,
(void *)smsghdr.msg_control,
smsghdr.msg_controllen)) {
err(1, "UDP setsockopt");
}
#else
src.sin6_ifindex = dst.sin6_ifindex;
#endif
if (connect(dummy, (struct sockaddr *)&src, len) < 0)
err(1, "UDP connect");
if (getsockname(dummy, (struct sockaddr *)&src, &len) < 0)
err(1, "getsockname");
close(dummy);
}
#if defined(SO_SNDBUF) && defined(SO_RCVBUF)
if (sockbufsize) {
if (datalen > sockbufsize)
warnx("you need -b to increae socket buffer size");
if (setsockopt(s, SOL_SOCKET, SO_SNDBUF, &sockbufsize,
sizeof(sockbufsize)) < 0)
err(1, "setsockopt(SO_SNDBUF)");
if (setsockopt(s, SOL_SOCKET, SO_RCVBUF, &sockbufsize,
sizeof(sockbufsize)) < 0)
err(1, "setsockopt(SO_RCVBUF)");
}
else {
if (datalen > 8 * 1024) /*XXX*/
warnx("you need -b to increase socket buffer size");
/*
* 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.
*/
hold = 48 * 1024;
setsockopt(s, SOL_SOCKET, SO_RCVBUF, (char *)&hold, sizeof(hold));
}
#endif
optval = 1;
#ifndef SIN6_IFINDEX
setsockopt(s, IPPROTO_IPV6, IPV6_PKTINFO, &optval, sizeof(optval));
#endif
setsockopt(s, IPPROTO_IPV6, IPV6_HOPLIMIT, &optval, sizeof(optval));
printf("PING6(%d=40+8+%d bytes) ", datalen + 48, datalen);
printf("%s --> ", inet_ntop(AF_INET6, &src.sin6_addr, ntop_buf, sizeof(ntop_buf)));
printf("%s\n", inet_ntop(AF_INET6, &dst.sin6_addr, ntop_buf, sizeof(ntop_buf)));
while (preload--) /* Fire off them quickies. */
pinger();
(void)signal(SIGINT, onint);
(void)signal(SIGINFO, oninfo);
if ((options & F_FLOOD) == 0) {
(void)signal(SIGALRM, onalrm);
itimer.it_interval.tv_sec = interval;
itimer.it_interval.tv_usec = 0;
itimer.it_value.tv_sec = 0;
itimer.it_value.tv_usec = 1;
(void)setitimer(ITIMER_REAL, &itimer, NULL);
}
FD_ZERO(&fdset);
timeout.tv_sec = 0;
timeout.tv_usec = 10000;
for (;;) {
struct msghdr m;
struct cmsghdr *cm;
u_char buf[256];
struct iovec iov[2];
if (options & F_FLOOD) {
pinger();
FD_SET(s, &fdset);
if (select(s + 1, &fdset, NULL, NULL, &timeout) < 1)
continue;
}
fromlen = sizeof(from);
m.msg_name = (caddr_t)&from;
m.msg_namelen = sizeof(from);
memset(&iov, 0, sizeof(iov));
iov[0].iov_base = (caddr_t)packet;
iov[0].iov_len = packlen;
m.msg_iov = iov;
m.msg_iovlen = 1;
cm = (struct cmsghdr *)buf;
m.msg_control = (caddr_t)buf;
m.msg_controllen = sizeof(buf);
if ((cc = recvmsg(s, &m, 0)) < 0) {
if (errno == EINTR)
continue;
warn("recvfrom");
continue;
}
pr_pack(packet, cc, &m);
if (npackets && nreceived >= npackets)
break;
}
summary();
exit(nreceived == 0);
}
/*
* onalrm --
* This routine transmits another ping6.
*/
void
onalrm(signo)
int signo;
{
struct itimerval itimer;
if (!npackets || ntransmitted < npackets) {
pinger();
return;
}
/*
* If we're not transmitting any more packets, change the timer
* to wait two round-trip times if we've received any packets or
* ten seconds if we haven't.
*/
#define MAXWAIT 10
if (nreceived) {
itimer.it_value.tv_sec = 2 * tmax / 1000;
if (itimer.it_value.tv_sec == 0)
itimer.it_value.tv_sec = 1;
} else
itimer.it_value.tv_sec = MAXWAIT;
itimer.it_interval.tv_sec = 0;
itimer.it_interval.tv_usec = 0;
itimer.it_value.tv_usec = 0;
(void)signal(SIGALRM, onint);
(void)setitimer(ITIMER_REAL, &itimer, NULL);
}
/*
* 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.
*/
void
pinger()
{
struct icmp6_hdr *icp;
struct iovec iov[2];
int i, cc;
icp = (struct icmp6_hdr *)outpack;
icp->icmp6_code = 0;
icp->icmp6_cksum = 0;
icp->icmp6_seq = ntransmitted++;
icp->icmp6_id = ident; /* ID */
CLR(icp->icmp6_seq % mx_dup_ck);
if (options & F_FQDN) {
icp->icmp6_type = ICMP6_NI_QUERY;
/* code field is always 0 */
/* XXX: overwrite icmp6_id */
icp->icmp6_data16[0] = htons(NI_QTYPE_FQDN);
if (timing)
(void)gettimeofday((struct timeval *)
&outpack[ICMP6ECHOLEN], NULL);
cc = ICMP6_NIQLEN;
datalen = 0;
} else if (options & F_NODEADDR) {
icp->icmp6_type = ICMP6_NI_QUERY;
/* code field is always 0 */
/* XXX: overwrite icmp6_id */
icp->icmp6_data16[0] = htons(NI_QTYPE_NODEADDR);
if (timing)
(void)gettimeofday((struct timeval *)
&outpack[ICMP6ECHOLEN], NULL);
cc = ICMP6_NIQLEN;
datalen = 0;
((struct icmp6_nodeinfo *)icp)->ni_flags = naflags;
}
else {
icp->icmp6_type = ICMP6_ECHO_REQUEST;
if (timing)
(void)gettimeofday((struct timeval *)
&outpack[ICMP6ECHOLEN], NULL);
cc = ICMP6ECHOLEN + datalen;
}
smsghdr.msg_name = (caddr_t)&dst;
smsghdr.msg_namelen = sizeof(dst);
memset(&iov, 0, sizeof(iov));
iov[0].iov_base = (caddr_t)outpack;
iov[0].iov_len = cc;
smsghdr.msg_iov = iov;
smsghdr.msg_iovlen = 1;
i = sendmsg(s, &smsghdr, 0);
if (i < 0 || i != cc) {
if (i < 0)
warn("sendmsg");
(void)printf("ping6: 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!).
*/
void
pr_pack(buf, cc, mhdr)
u_char *buf;
int cc;
struct msghdr *mhdr;
{
struct icmp6_hdr *icp;
int i;
int hoplim;
struct sockaddr_in6 *from = (struct sockaddr_in6 *)mhdr->msg_name;
u_char *cp = NULL, *dp, *end = buf + cc;
#ifdef OLD_RAWSOCKET
struct ip6_hdr *ip;
#endif
struct timeval tv, *tp;
double triptime = 0;
int dupflag;
size_t off;
(void)gettimeofday(&tv, NULL);
#ifdef OLD_RAWSOCKET
/* Check the IP header */
ip = (struct ip6_hdr *)buf;
if (cc < sizeof(struct icmp6_hdr) + sizeof(struct ip6_hdr)) {
if (options & F_VERBOSE)
warnx("packet too short (%d bytes) from %s\n", cc,
inet_ntop(AF_INET6, (void *)&from->sin6_addr,
ntop_buf, sizeof(ntop_buf)));
return;
}
/* chase nexthdr link */
{
u_int8_t nh;
struct ah *ah;
struct ip6_ext *ip6e;
off = IP6LEN;
nh = ip->ip6_nxt;
while (nh != IPPROTO_ICMPV6) {
if (options & F_VERBOSE)
fprintf(stderr, "header chain: type=0x%x\n", nh);
switch (nh) {
case IPPROTO_AH:
ah = (struct ah *)(buf + off);
off += sizeof(struct ah);
off += (ah->ah_len << 2);
nh = ah->ah_nxt;
break;
case IPPROTO_HOPOPTS:
ip6e = (struct ip6_ext *)(buf + off);
off += (ip6e->ip6e_len + 1) << 3;
nh = ip6e->ip6e_nxt;
break;
default:
if (options & F_VERBOSE) {
fprintf(stderr,
"unknown header type=0x%x: drop it\n",
nh);
}
return;
}
}
}
/* Now the ICMP part */
icp = (struct icmp6_hdr *)(buf + off);
#else
if (cc < sizeof(struct icmp6_hdr)) {
if (options & F_VERBOSE)
warnx("packet too short (%d bytes) from %s\n", cc,
inet_ntop(AF_INET6, (void *)&from->sin6_addr,
ntop_buf, sizeof(ntop_buf)));
return;
}
icp = (struct icmp6_hdr *)buf;
off = 0;
#endif
if ((hoplim = get_hoplim(mhdr)) == -1) {
warnx("failed to get receiving hop limit");
return;
}
if (icp->icmp6_type == ICMP6_ECHO_REPLY) {
if (icp->icmp6_id != ident)
return; /* It was not our ECHO */
++nreceived;
if (timing) {
tp = (struct timeval *)(icp + 1);
tvsub(&tv, tp);
triptime = ((double)tv.tv_sec) * 1000.0 +
((double)tv.tv_usec) / 1000.0;
tsum += triptime;
if (triptime < tmin)
tmin = triptime;
if (triptime > tmax)
tmax = triptime;
}
if (TST(icp->icmp6_seq % mx_dup_ck)) {
++nrepeats;
--nreceived;
dupflag = 1;
} else {
SET(icp->icmp6_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,
pr_addr(&from->sin6_addr),
icp->icmp6_seq);
(void)printf(" hlim=%d", hoplim);
if (timing)
(void)printf(" time=%g ms", triptime);
if (dupflag)
(void)printf("(DUP!)");
/* check the data */
cp = buf + off + ICMP6ECHOLEN + ICMP6ECHOTMLEN;
dp = outpack + ICMP6ECHOLEN + ICMP6ECHOTMLEN;
for (i = 8; cp < end; ++i, ++cp, ++dp) {
if (*cp != *dp) {
(void)printf("\nwrong data byte #%d should be 0x%x but was 0x%x", i, *dp, *cp);
break;
}
}
}
} else if (icp->icmp6_type == ICMP6_NI_REPLY) { /* ICMP6_NI_REPLY */
struct icmp6_nodeinfo *ni = (struct icmp6_nodeinfo *)(buf + off);
(void)printf("%d bytes from %s: ", cc,
pr_addr(&from->sin6_addr));
switch(ntohs(ni->ni_qtype)) {
case NI_QTYPE_NOOP:
printf("NodeInfo NOOP");
break;
case NI_QTYPE_SUPTYPES:
printf("NodeInfo Supported Qtypes");
break;
case NI_QTYPE_NODEADDR:
pr_nodeaddr(ni, end - (u_char *)ni);
break;
case NI_QTYPE_FQDN:
default: /* XXX: for backward compatibility */
cp = (u_char *)ni + ICMP6_NIRLEN + 1;
while (cp < end) {
if (isprint(*cp))
putchar(*cp);
else
printf("\\%03o", *cp & 0xff);
cp++;
}
if (options & F_VERBOSE) {
long ttl;
(void)printf(" (");
switch(ni->ni_code) {
case ICMP6_NI_REFUSED:
(void)printf("refused,");
break;
case ICMP6_NI_UNKNOWN:
(void)printf("unknwon qtype,");
break;
}
if ((end - (u_char *)ni) < ICMP6_NIRLEN) {
/* case of refusion, unkown */
goto fqdnend;
}
ttl = ntohl(*(u_long *)&buf[off+ICMP6ECHOLEN+8]);
if (!(ni->ni_flags & NI_FQDN_FLAG_VALIDTTL))
(void)printf("TTL=%d:meaningless",
(int)ttl);
else {
if (ttl < 0)
(void)printf("TTL=%d:invalid",
(int)ttl);
else
(void)printf("TTL=%d",
(int)ttl);
}
if (buf[off + ICMP6_NIRLEN] !=
cc - off - ICMP6_NIRLEN - 1) {
(void)printf(",invalid namelen:%d/%lu",
buf[off + ICMP6_NIRLEN],
(u_long)cc - off - ICMP6_NIRLEN - 1);
}
putchar(')');
}
fqdnend:
;
}
} else {
/* We've got something other than an ECHOREPLY */
if (!(options & F_VERBOSE))
return;
(void)printf("%d bytes from %s: ", cc,
pr_addr(&from->sin6_addr));
pr_icmph(icp, end);
}
if (!(options & F_FLOOD)) {
(void)putchar('\n');
(void)fflush(stdout);
}
}
void
pr_nodeaddr(ni, nilen)
struct icmp6_nodeinfo *ni; /* ni->qtype must be NODEADDR */
int nilen;
{
struct in6_addr *ia6 = (struct in6_addr *)(ni + 1);
nilen -= sizeof(struct icmp6_nodeinfo);
if (options & F_VERBOSE) {
switch(ni->ni_code) {
case ICMP6_NI_REFUSED:
(void)printf("refused");
break;
case ICMP6_NI_UNKNOWN:
(void)printf("unknown qtype");
break;
}
if (ni->ni_flags & NI_NODEADDR_FLAG_ALL)
(void)printf(" truncated");
}
putchar('\n');
if (nilen <= 0)
printf(" no address\n");
for (; nilen > 0; nilen -= sizeof(*ia6), ia6 += 1) {
printf(" %s\n",
inet_ntop(AF_INET6, ia6, ntop_buf, sizeof(ntop_buf)));
}
}
int
get_hoplim(mhdr)
struct msghdr *mhdr;
{
struct cmsghdr *cm;
for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
if (cm->cmsg_level == IPPROTO_IPV6 &&
cm->cmsg_type == IPV6_HOPLIMIT &&
cm->cmsg_len == CMSG_LEN(sizeof(int)))
return(*(int *)CMSG_DATA(cm));
}
return(-1);
}
/*
* tvsub --
* Subtract 2 timeval structs: out = out - in. Out is assumed to
* be >= in.
*/
void
tvsub(out, in)
register struct timeval *out, *in;
{
if ((out->tv_usec -= in->tv_usec) < 0) {
--out->tv_sec;
out->tv_usec += 1000000;
}
out->tv_sec -= in->tv_sec;
}
/*
* oninfo --
* SIGINFO handler.
*/
void
oninfo(notused)
int notused;
{
summary();
}
/*
* onint --
* SIGINT handler.
*/
void
onint(notused)
int notused;
{
summary();
(void)signal(SIGINT, SIG_DFL);
(void)kill(getpid(), SIGINT);
/* NOTREACHED */
exit(1);
}
/*
* summary --
* Print out statistics.
*/
void
summary()
{
register int i;
(void)printf("\n--- %s ping6 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 microseconds */
i = 1000.0 * tsum / (nreceived + nrepeats);
(void)printf("round-trip min/avg/max = %g/%g/%g ms\n",
tmin, ((double)i) / 1000.0, tmax);
(void)fflush(stdout);
}
}
#ifdef notdef
static 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.
*/
void
pr_icmph(icp, end)
struct icmp6_hdr *icp;
u_char *end;
{
switch(icp->icmp6_type) {
case ICMP6_DST_UNREACH:
switch(icp->icmp6_code) {
case ICMP6_DST_UNREACH_NOROUTE:
(void)printf("No Route to Destination\n");
break;
case ICMP6_DST_UNREACH_ADMIN:
(void)printf("Destination Administratively "
"Unreachable\n");
break;
case ICMP6_DST_UNREACH_NOTNEIGHBOR:
(void)printf("Destination Unreachable Notneighbor\n");
break;
case ICMP6_DST_UNREACH_ADDR:
(void)printf("Destination Host Unreachable\n");
break;
case ICMP6_DST_UNREACH_NOPORT:
(void)printf("Destination Port Unreachable\n");
break;
default:
(void)printf("Destination Unreachable, Bad Code: %d\n",
icp->icmp6_code);
break;
}
/* Print returned IP header information */
pr_retip((struct ip6_hdr *)(icp + 1), end);
break;
case ICMP6_PACKET_TOO_BIG:
(void)printf("Packet too big mtu = %d\n",
(int)ntohl(icp->icmp6_mtu));
break;
case ICMP6_TIME_EXCEEDED:
switch(icp->icmp6_code) {
case ICMP6_TIME_EXCEED_TRANSIT:
(void)printf("Time to live exceeded\n");
break;
case ICMP6_TIME_EXCEED_REASSEMBLY:
(void)printf("Frag reassembly time exceeded\n");
break;
default:
(void)printf("Time exceeded, Bad Code: %d\n",
icp->icmp6_code);
break;
}
pr_retip((struct ip6_hdr *)(icp + 1), end);
break;
case ICMP6_PARAM_PROB:
(void)printf("Parameter problem: ");
switch(icp->icmp6_code) {
case ICMP6_PARAMPROB_HEADER:
(void)printf("Erroneous Header ");
break;
case ICMP6_PARAMPROB_NEXTHEADER:
(void)printf("Unknown Nextheader ");
break;
case ICMP6_PARAMPROB_OPTION:
(void)printf("Unrecognized Option ");
break;
default:
(void)printf("Bad code(%d) ", icp->icmp6_code);
break;
}
(void)printf("pointer = 0x%02x\n",
(int)ntohl(icp->icmp6_pptr));
pr_retip((struct ip6_hdr *)(icp + 1), end);
break;
case ICMP6_ECHO_REQUEST:
(void)printf("Echo Request\n");
/* XXX ID + Seq + Data */
break;
case ICMP6_ECHO_REPLY:
(void)printf("Echo Reply\n");
/* XXX ID + Seq + Data */
break;
case ICMP6_MEMBERSHIP_QUERY:
(void)printf("Membership Query\n");
break;
case ICMP6_MEMBERSHIP_REPORT:
(void)printf("Membership Report\n");
break;
case ICMP6_MEMBERSHIP_REDUCTION:
(void)printf("Membership Reduction\n");
break;
case ND_ROUTER_SOLICIT:
(void)printf("Router Solicitation\n");
break;
case ND_ROUTER_ADVERT:
(void)printf("Router Advertisement\n");
break;
case ND_NEIGHBOR_SOLICIT:
(void)printf("Neighbor Solicitation\n");
break;
case ND_NEIGHBOR_ADVERT:
(void)printf("Neighbor Advertisement\n");
break;
case ND_REDIRECT:
{
struct nd_redirect *red = (struct nd_redirect *)icp;
(void)printf("Redirect\n");
(void)printf("Destination: %s\n",
inet_ntop(AF_INET6, &red->nd_rd_dst,
ntop_buf, sizeof(ntop_buf)));
(void)printf("New Target: %s\n",
inet_ntop(AF_INET6, &red->nd_rd_target,
ntop_buf, sizeof(ntop_buf)));
break;
}
case ICMP6_NI_QUERY:
(void)printf("Node Information Query\n");
/* XXX ID + Seq + Data */
break;
case ICMP6_NI_REPLY:
(void)printf("Node Information Reply\n");
/* XXX ID + Seq + Data */
break;
default:
(void)printf("Bad ICMP type: %d\n", icp->icmp6_type);
}
}
/*
* pr_iph --
* Print an IP6 header.
*/
void
pr_iph(ip6)
struct ip6_hdr *ip6;
{
u_int32_t flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK;
u_int8_t tc;
tc = *(&ip6->ip6_vfc + 1); /* XXX */
tc = (tc >> 4) & 0x0f;
tc |= (ip6->ip6_vfc << 4);
printf("Vr TC Flow Plen Nxt Hlim\n");
printf(" %1x %02x %05x %04x %02x %02x\n",
(ip6->ip6_vfc & IPV6_VERSION_MASK) >> 4, tc, (int)ntohl(flow),
ntohs(ip6->ip6_plen),
ip6->ip6_nxt, ip6->ip6_hlim);
printf("%s->", inet_ntop(AF_INET6, &ip6->ip6_src,
ntop_buf, INET6_ADDRSTRLEN));
printf("%s\n", inet_ntop(AF_INET6, &ip6->ip6_dst,
ntop_buf, INET6_ADDRSTRLEN));
}
/*
* pr_addr --
* Return an ascii host address as a dotted quad and optionally with
* a hostname.
*/
char *
pr_addr(addr)
struct in6_addr *addr;
{
static char buf[MAXHOSTNAMELEN];
struct sockaddr_in6 sin6;
int flag = 0;
if (options & F_NUMERIC)
flag |= NI_NUMERICHOST;
bzero(&sin6, sizeof(sin6));
sin6.sin6_family = AF_INET6;
sin6.sin6_len = sizeof(sin6);
sin6.sin6_addr = *addr;
getnameinfo((struct sockaddr *)&sin6, sizeof(sin6),
buf, sizeof(buf), NULL, 0, flag);
return (buf);
}
/*
* pr_retip --
* Dump some info on a returned (via ICMPv6) IPv6 packet.
*/
void
pr_retip(ip6, end)
struct ip6_hdr *ip6;
u_char *end;
{
u_char *cp = (u_char *)ip6, nh;
int hlen;
if (end - (u_char *)ip6 < sizeof(*ip6)) {
printf("IP6");
goto trunc;
}
pr_iph(ip6);
hlen = sizeof(*ip6);
nh = ip6->ip6_nxt;
cp += hlen;
while(end - cp >= 8) {
switch(nh) {
case IPPROTO_HOPOPTS:
printf("HBH ");
hlen = (((struct ip6_hbh *)cp)->ip6h_len+1) << 3;
nh = ((struct ip6_hbh *)cp)->ip6h_nxt;
break;
case IPPROTO_DSTOPTS:
printf("DSTOPT ");
hlen = (((struct ip6_dest *)cp)->ip6d_len+1) << 3;
nh = ((struct ip6_dest *)cp)->ip6d_nxt;
break;
case IPPROTO_FRAGMENT:
printf("FRAG ");
hlen = sizeof(struct ip6_frag);
nh = ((struct ip6_frag *)cp)->ip6f_nxt;
break;
case IPPROTO_ROUTING:
printf("RTHDR ");
hlen = (((struct ip6_rthdr *)cp)->ip6r_len+1) << 3;
nh = ((struct ip6_rthdr *)cp)->ip6r_nxt;
break;
case IPPROTO_AH:
printf("AH ");
hlen = (((struct ah *)cp)->ah_len+2) << 2;
nh = ((struct ah *)cp)->ah_nxt;
break;
case IPPROTO_ICMPV6:
printf("ICMP6: type = %d, code = %d\n",
*cp, *(cp + 1));
return;
case IPPROTO_ESP:
printf("ESP\n");
return;
case IPPROTO_TCP:
printf("TCP: from port %u, to port %u (decimal)\n",
(*cp * 256 + *(cp + 1)),
(*(cp + 2) * 256 + *(cp + 3)));
return;
case IPPROTO_UDP:
printf("UDP: from port %u, to port %u (decimal)\n",
(*cp * 256 + *(cp + 1)),
(*(cp + 2) * 256 + *(cp + 3)));
return;
default:
printf("Unknown Header(%d)\n", nh);
return;
}
if ((cp += hlen) >= end)
goto trunc;
}
if (end - cp < 8)
goto trunc;
putchar('\n');
return;
trunc:
printf("...\n");
return;
}
void
fill(bp, patp)
char *bp, *patp;
{
register int ii, jj, kk;
int pat[16];
char *cp;
for (cp = patp; *cp; cp++)
if (!isxdigit(*cp))
errx(1, "patterns must be specified as hex digits");
ii = sscanf(patp,
"%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x",
&pat[0], &pat[1], &pat[2], &pat[3], &pat[4], &pat[5], &pat[6],
&pat[7], &pat[8], &pat[9], &pat[10], &pat[11], &pat[12],
&pat[13], &pat[14], &pat[15]);
/* xxx */
if (ii > 0)
for (kk = 0;
kk <= MAXDATALEN - (8 + sizeof(struct timeval) + ii);
kk += ii)
for (jj = 0; jj < ii; ++jj)
bp[jj + kk] = pat[jj];
if (!(options & F_QUIET)) {
(void)printf("PATTERN: 0x");
for (jj = 0; jj < ii; ++jj)
(void)printf("%02x", bp[jj] & 0xFF);
(void)printf("\n");
}
}
void
usage()
{
(void)fprintf(stderr,
"usage: ping6 [-dfnqRrvwW"
#ifdef IPSEC
#ifdef IPSEC_POLICY_IPSEC
"] [-P policy"
#else
"AE"
#endif
#endif
"] [-a [alsg]] [-b sockbufsiz] [-c count] [-I interface]\n\
[-i wait] [-l preload] [-p pattern] [-s packetsize]\n\
[-h hoplimit] host [hosts...]\n");
exit(1);
}
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