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HardenedBSD/sbin/ping6/ping6.c
Pedro F. Giffuni 8a16b7a18f General further adoption of SPDX licensing ID tags. 
Mainly focus on files that use BSD 3-Clause license.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

Special thanks to Wind River for providing access to "The Duke of
Highlander" tool: an older (2014) run over FreeBSD tree was useful as a
starting point.
2017-11-20 19:49:47 +00:00

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/* $KAME: ping6.c,v 1.169 2003/07/25 06:01:47 itojun Exp $ */
/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* 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. 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 const char copyright[] =
"@(#) Copyright (c) 1989, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)ping.c 8.1 (Berkeley) 6/5/93";
#endif
#endif /* not lint */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* 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.
*/
/*
* NOTE:
* USE_SIN6_SCOPE_ID assumes that sin6_scope_id has the same semantics
* as IPV6_PKTINFO. Some people object it (sin6_scope_id specifies *link*
* while IPV6_PKTINFO specifies *interface*. Link is defined as collection of
* network attached to 1 or more interfaces)
*/
#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.h>
#include <netinet/ip6.h>
#include <netinet/icmp6.h>
#include <arpa/inet.h>
#include <arpa/nameser.h>
#include <netdb.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <math.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <unistd.h>
#ifdef IPSEC
#include <netipsec/ah.h>
#include <netipsec/ipsec.h>
#endif
#include <md5.h>
struct tv32 {
u_int32_t tv32_sec;
u_int32_t tv32_usec;
};
#define MAXPACKETLEN 131072
#define IP6LEN 40
#define ICMP6ECHOLEN 8 /* icmp echo header len excluding time */
#define ICMP6ECHOTMLEN sizeof(struct tv32)
#define ICMP6_NIQLEN (ICMP6ECHOLEN + 8)
# define CONTROLLEN 10240 /* ancillary data buffer size RFC3542 20.1 */
/* FQDN case, 64 bits of nonce + 32 bits ttl */
#define ICMP6_NIRLEN (ICMP6ECHOLEN + 12)
#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 MAXWAIT 10000 /* max ms to wait for response */
#define MAXALARM (60 * 60) /* max seconds for alarm timeout */
#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_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 0x0400
#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
#define F_SRCADDR 0x4000
#define F_HOSTNAME 0x10000
#define F_FQDNOLD 0x20000
#define F_NIGROUP 0x40000
#define F_SUPTYPES 0x80000
#define F_NOMINMTU 0x100000
#define F_ONCE 0x200000
#define F_AUDIBLE 0x400000
#define F_MISSED 0x800000
#define F_DONTFRAG 0x1000000
#define F_NOUSERDATA (F_NODEADDR | F_FQDN | F_FQDNOLD | F_SUPTYPES)
#define F_WAITTIME 0x2000000
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)
static int mx_dup_ck = MAX_DUP_CHK;
static char rcvd_tbl[MAX_DUP_CHK / 8];
static struct sockaddr_in6 dst; /* who to ping6 */
static struct sockaddr_in6 src; /* src addr of this packet */
static socklen_t srclen;
static size_t datalen = DEFDATALEN;
static int s; /* socket file descriptor */
static u_char outpack[MAXPACKETLEN];
static char BSPACE = '\b'; /* characters written for flood */
static char BBELL = '\a'; /* characters written for AUDIBLE */
static char DOT = '.';
static char *hostname;
static int ident; /* process id to identify our packets */
static u_int8_t nonce[8]; /* nonce field for node information */
static int hoplimit = -1; /* hoplimit */
static u_char *packet = NULL;
/* counters */
static long nmissedmax; /* max value of ntransmitted - nreceived - 1 */
static long npackets; /* max packets to transmit */
static long nreceived; /* # of packets we got back */
static long nrepeats; /* number of duplicates */
static long ntransmitted; /* sequence # for outbound packets = #sent */
static int interval = 1000; /* interval between packets in ms */
static int waittime = MAXWAIT; /* timeout for each packet */
static long nrcvtimeout = 0; /* # of packets we got back after waittime */
/* timing */
static int timing; /* flag to do timing */
static double tmin = 999999999.0; /* minimum round trip time */
static double tmax = 0.0; /* maximum round trip time */
static double tsum = 0.0; /* sum of all times, for doing average */
static double tsumsq = 0.0; /* sum of all times squared, for std. dev. */
/* for node addresses */
static u_short naflags;
/* for ancillary data(advanced API) */
static struct msghdr smsghdr;
static struct iovec smsgiov;
static char *scmsg = 0;
static volatile sig_atomic_t seenint;
#ifdef SIGINFO
static volatile sig_atomic_t seeninfo;
#endif
int main(int, char *[]);
static void fill(char *, char *);
static int get_hoplim(struct msghdr *);
static int get_pathmtu(struct msghdr *);
static struct in6_pktinfo *get_rcvpktinfo(struct msghdr *);
static void onsignal(int);
static void onint(int);
static size_t pingerlen(void);
static int pinger(void);
static const char *pr_addr(struct sockaddr *, int);
static void pr_icmph(struct icmp6_hdr *, u_char *);
static void pr_iph(struct ip6_hdr *);
static void pr_suptypes(struct icmp6_nodeinfo *, size_t);
static void pr_nodeaddr(struct icmp6_nodeinfo *, int);
static int myechoreply(const struct icmp6_hdr *);
static int mynireply(const struct icmp6_nodeinfo *);
static char *dnsdecode(const u_char **, const u_char *, const u_char *,
char *, size_t);
static void pr_pack(u_char *, int, struct msghdr *);
static void pr_exthdrs(struct msghdr *);
static void pr_ip6opt(void *, size_t);
static void pr_rthdr(void *, size_t);
static int pr_bitrange(u_int32_t, int, int);
static void pr_retip(struct ip6_hdr *, u_char *);
static void summary(void);
static void tvsub(struct timeval *, struct timeval *);
static int setpolicy(int, char *);
static char *nigroup(char *, int);
static void usage(void);
int
main(int argc, char *argv[])
{
struct timeval last, intvl;
struct sockaddr_in6 from, *sin6;
struct addrinfo hints, *res;
struct sigaction si_sa;
int cc, i;
int almost_done, ch, hold, packlen, preload, optval, error;
int nig_oldmcprefix = -1;
u_char *datap;
char *e, *target, *ifname = NULL, *gateway = NULL;
int ip6optlen = 0;
struct cmsghdr *scmsgp = NULL;
/* For control (ancillary) data received from recvmsg() */
struct cmsghdr cm[CONTROLLEN];
#if defined(SO_SNDBUF) && defined(SO_RCVBUF)
u_long lsockbufsize;
int sockbufsize = 0;
#endif
int usepktinfo = 0;
struct in6_pktinfo *pktinfo = NULL;
#ifdef USE_RFC2292BIS
struct ip6_rthdr *rthdr = NULL;
#endif
#ifdef IPSEC_POLICY_IPSEC
char *policy_in = NULL;
char *policy_out = NULL;
#endif
double t;
u_long alarmtimeout;
size_t rthlen;
#ifdef IPV6_USE_MIN_MTU
int mflag = 0;
#endif
/* just to be sure */
memset(&smsghdr, 0, sizeof(smsghdr));
memset(&smsgiov, 0, sizeof(smsgiov));
alarmtimeout = preload = 0;
datap = &outpack[ICMP6ECHOLEN + ICMP6ECHOTMLEN];
#ifndef IPSEC
#define ADDOPTS
#else
#ifdef IPSEC_POLICY_IPSEC
#define ADDOPTS "P:"
#else
#define ADDOPTS "AE"
#endif /*IPSEC_POLICY_IPSEC*/
#endif
while ((ch = getopt(argc, argv,
"a:b:c:DdfHg:h:I:i:l:mnNop:qrRS:s:tvwWx:X:" ADDOPTS)) != -1) {
#undef ADDOPTS
switch (ch) {
case 'a':
{
char *cp;
options &= ~F_NOUSERDATA;
options |= F_NODEADDR;
for (cp = optarg; *cp != '\0'; cp++) {
switch (*cp) {
case 'a':
naflags |= NI_NODEADDR_FLAG_ALL;
break;
case 'c':
case 'C':
naflags |= NI_NODEADDR_FLAG_COMPAT;
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;
case 'A': /* experimental. not in the spec */
#ifdef NI_NODEADDR_FLAG_ANYCAST
naflags |= NI_NODEADDR_FLAG_ANYCAST;
break;
#else
errx(1,
"-a A is not supported on the platform");
/*NOTREACHED*/
#endif
default:
usage();
/*NOTREACHED*/
}
}
break;
}
case 'b':
#if defined(SO_SNDBUF) && defined(SO_RCVBUF)
errno = 0;
e = NULL;
lsockbufsize = strtoul(optarg, &e, 10);
sockbufsize = (int)lsockbufsize;
if (errno || !*optarg || *e ||
lsockbufsize > INT_MAX)
errx(1, "invalid socket buffer size");
#else
errx(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_DONTFRAG;
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 'g':
gateway = optarg;
break;
case 'H':
options |= F_HOSTNAME;
break;
case 'h': /* hoplimit */
hoplimit = strtol(optarg, &e, 10);
if (*optarg == '\0' || *e != '\0')
errx(1, "illegal hoplimit %s", optarg);
if (255 < hoplimit || hoplimit < -1)
errx(1,
"illegal hoplimit -- %s", optarg);
break;
case 'I':
ifname = optarg;
options |= F_INTERFACE;
#ifndef USE_SIN6_SCOPE_ID
usepktinfo++;
#endif
break;
case 'i': /* wait between sending packets */
t = strtod(optarg, &e);
if (*optarg == '\0' || *e != '\0')
errx(1, "illegal timing interval %s", optarg);
if (t < 1 && getuid()) {
errx(1, "%s: only root may use interval < 1s",
strerror(EPERM));
}
intvl.tv_sec = (long)t;
intvl.tv_usec =
(long)((t - intvl.tv_sec) * 1000000);
if (intvl.tv_sec < 0)
errx(1, "illegal timing interval %s", optarg);
/* less than 1/hz does not make sense */
if (intvl.tv_sec == 0 && intvl.tv_usec < 1) {
warnx("too small interval, raised to .000001");
intvl.tv_usec = 1;
}
options |= F_INTERVAL;
break;
case 'l':
if (getuid()) {
errno = EPERM;
errx(1, "Must be superuser to preload");
}
preload = strtol(optarg, &e, 10);
if (preload < 0 || *optarg == '\0' || *e != '\0')
errx(1, "illegal preload value -- %s", optarg);
break;
case 'm':
#ifdef IPV6_USE_MIN_MTU
mflag++;
break;
#else
errx(1, "-%c is not supported on this platform", ch);
/*NOTREACHED*/
#endif
case 'n':
options &= ~F_HOSTNAME;
break;
case 'N':
options |= F_NIGROUP;
nig_oldmcprefix++;
break;
case 'o':
options |= F_ONCE;
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_AUDIBLE;
break;
case 'R':
options |= F_MISSED;
break;
case 'S':
memset(&hints, 0, sizeof(struct addrinfo));
hints.ai_flags = AI_NUMERICHOST; /* allow hostname? */
hints.ai_family = AF_INET6;
hints.ai_socktype = SOCK_RAW;
hints.ai_protocol = IPPROTO_ICMPV6;
error = getaddrinfo(optarg, NULL, &hints, &res);
if (error) {
errx(1, "invalid source address: %s",
gai_strerror(error));
}
/*
* res->ai_family must be AF_INET6 and res->ai_addrlen
* must be sizeof(src).
*/
memcpy(&src, res->ai_addr, res->ai_addrlen);
srclen = res->ai_addrlen;
freeaddrinfo(res);
options |= F_SRCADDR;
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 't':
options &= ~F_NOUSERDATA;
options |= F_SUPTYPES;
break;
case 'v':
options |= F_VERBOSE;
break;
case 'w':
options &= ~F_NOUSERDATA;
options |= F_FQDN;
break;
case 'W':
options &= ~F_NOUSERDATA;
options |= F_FQDNOLD;
break;
case 'x':
t = strtod(optarg, &e);
if (*e || e == optarg || t > (double)INT_MAX)
err(EX_USAGE, "invalid timing interval: `%s'",
optarg);
options |= F_WAITTIME;
waittime = (int)t;
break;
case 'X':
alarmtimeout = strtoul(optarg, &e, 0);
if ((alarmtimeout < 1) || (alarmtimeout == ULONG_MAX))
errx(EX_USAGE, "invalid timeout: `%s'",
optarg);
if (alarmtimeout > MAXALARM)
errx(EX_USAGE, "invalid timeout: `%s' > %d",
optarg, MAXALARM);
alarm((int)alarmtimeout);
break;
#ifdef IPSEC
#ifdef IPSEC_POLICY_IPSEC
case 'P':
options |= F_POLICY;
if (!strncmp("in", optarg, 2)) {
if ((policy_in = strdup(optarg)) == NULL)
errx(1, "strdup");
} else if (!strncmp("out", optarg, 3)) {
if ((policy_out = strdup(optarg)) == NULL)
errx(1, "strdup");
} else
errx(1, "invalid security policy");
break;
#else
case 'A':
options |= F_AUTHHDR;
break;
case 'E':
options |= F_ENCRYPT;
break;
#endif /*IPSEC_POLICY_IPSEC*/
#endif /*IPSEC*/
default:
usage();
/*NOTREACHED*/
}
}
argc -= optind;
argv += optind;
if (argc < 1) {
usage();
/*NOTREACHED*/
}
if (argc > 1) {
#ifdef IPV6_RECVRTHDR /* 2292bis */
rthlen = CMSG_SPACE(inet6_rth_space(IPV6_RTHDR_TYPE_0,
argc - 1));
#else /* RFC2292 */
rthlen = inet6_rthdr_space(IPV6_RTHDR_TYPE_0, argc - 1);
#endif
if (rthlen == 0) {
errx(1, "too many intermediate hops");
/*NOTREACHED*/
}
ip6optlen += rthlen;
}
if (options & F_NIGROUP) {
target = nigroup(argv[argc - 1], nig_oldmcprefix);
if (target == NULL) {
usage();
/*NOTREACHED*/
}
} else
target = argv[argc - 1];
/* getaddrinfo */
memset(&hints, 0, sizeof(struct addrinfo));
hints.ai_flags = AI_CANONNAME;
hints.ai_family = AF_INET6;
hints.ai_socktype = SOCK_RAW;
hints.ai_protocol = IPPROTO_ICMPV6;
error = getaddrinfo(target, NULL, &hints, &res);
if (error)
errx(1, "%s", gai_strerror(error));
if (res->ai_canonname)
hostname = strdup(res->ai_canonname);
else
hostname = target;
if (!res->ai_addr)
errx(1, "getaddrinfo failed");
(void)memcpy(&dst, res->ai_addr, res->ai_addrlen);
if ((s = socket(res->ai_family, res->ai_socktype,
res->ai_protocol)) < 0)
err(1, "socket");
freeaddrinfo(res);
/* set the source address if specified. */
if ((options & F_SRCADDR) != 0) {
/* properly fill sin6_scope_id */
if (IN6_IS_ADDR_LINKLOCAL(&src.sin6_addr) && (
IN6_IS_ADDR_LINKLOCAL(&dst.sin6_addr) ||
IN6_IS_ADDR_MC_LINKLOCAL(&dst.sin6_addr) ||
IN6_IS_ADDR_MC_NODELOCAL(&dst.sin6_addr))) {
if (src.sin6_scope_id == 0)
src.sin6_scope_id = dst.sin6_scope_id;
if (dst.sin6_scope_id == 0)
dst.sin6_scope_id = src.sin6_scope_id;
}
if (bind(s, (struct sockaddr *)&src, srclen) != 0)
err(1, "bind");
}
/* set the gateway (next hop) if specified */
if (gateway) {
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_INET6;
hints.ai_socktype = SOCK_RAW;
hints.ai_protocol = IPPROTO_ICMPV6;
error = getaddrinfo(gateway, NULL, &hints, &res);
if (error) {
errx(1, "getaddrinfo for the gateway %s: %s",
gateway, gai_strerror(error));
}
if (res->ai_next && (options & F_VERBOSE))
warnx("gateway resolves to multiple addresses");
if (setsockopt(s, IPPROTO_IPV6, IPV6_NEXTHOP,
res->ai_addr, res->ai_addrlen)) {
err(1, "setsockopt(IPV6_NEXTHOP)");
}
freeaddrinfo(res);
}
/*
* let the kerel pass extension headers of incoming packets,
* for privileged socket options
*/
if ((options & F_VERBOSE) != 0) {
int opton = 1;
#ifdef IPV6_RECVHOPOPTS
if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVHOPOPTS, &opton,
sizeof(opton)))
err(1, "setsockopt(IPV6_RECVHOPOPTS)");
#else /* old adv. API */
if (setsockopt(s, IPPROTO_IPV6, IPV6_HOPOPTS, &opton,
sizeof(opton)))
err(1, "setsockopt(IPV6_HOPOPTS)");
#endif
#ifdef IPV6_RECVDSTOPTS
if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVDSTOPTS, &opton,
sizeof(opton)))
err(1, "setsockopt(IPV6_RECVDSTOPTS)");
#else /* old adv. API */
if (setsockopt(s, IPPROTO_IPV6, IPV6_DSTOPTS, &opton,
sizeof(opton)))
err(1, "setsockopt(IPV6_DSTOPTS)");
#endif
#ifdef IPV6_RECVRTHDRDSTOPTS
if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVRTHDRDSTOPTS, &opton,
sizeof(opton)))
err(1, "setsockopt(IPV6_RECVRTHDRDSTOPTS)");
#endif
}
/* revoke root privilege */
if (seteuid(getuid()) != 0)
err(1, "seteuid() failed");
if (setuid(getuid()) != 0)
err(1, "setuid() failed");
if ((options & F_FLOOD) && (options & F_INTERVAL))
errx(1, "-f and -i incompatible options");
if ((options & F_NOUSERDATA) == 0) {
if (datalen >= sizeof(struct tv32)) {
/* we can time transfer */
timing = 1;
} else
timing = 0;
/* in F_VERBOSE case, we may get non-echoreply packets*/
if (options & F_VERBOSE)
packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA;
else
packlen = datalen + IP6LEN + ICMP6ECHOLEN + EXTRA;
} else {
/* suppress timing for node information query */
timing = 0;
datalen = 2048;
packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA;
}
if (!(packet = (u_char *)malloc((u_int)packlen)))
err(1, "Unable to allocate packet");
if (!(options & F_PINGFILLED))
for (i = ICMP6ECHOLEN; i < packlen; ++i)
*datap++ = i;
ident = getpid() & 0xFFFF;
arc4random_buf(nonce, sizeof(nonce));
optval = 1;
if (options & F_DONTFRAG)
if (setsockopt(s, IPPROTO_IPV6, IPV6_DONTFRAG,
&optval, sizeof(optval)) == -1)
err(1, "IPV6_DONTFRAG");
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 IPV6_USE_MIN_MTU
if (mflag != 1) {
optval = mflag > 1 ? 0 : 1;
if (setsockopt(s, IPPROTO_IPV6, IPV6_USE_MIN_MTU,
&optval, sizeof(optval)) == -1)
err(1, "setsockopt(IPV6_USE_MIN_MTU)");
}
#ifdef IPV6_RECVPATHMTU
else {
optval = 1;
if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVPATHMTU,
&optval, sizeof(optval)) == -1)
err(1, "setsockopt(IPV6_RECVPATHMTU)");
}
#endif /* IPV6_RECVPATHMTU */
#endif /* IPV6_USE_MIN_MTU */
#ifdef IPSEC
#ifdef IPSEC_POLICY_IPSEC
if (options & F_POLICY) {
if (setpolicy(s, policy_in) < 0)
errx(1, "%s", ipsec_strerror());
if (setpolicy(s, policy_out) < 0)
errx(1, "%s", ipsec_strerror());
}
#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_FQDNOLD) ||
(options & F_NODEADDR) || (options & F_SUPTYPES))
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*/
/* let the kerel pass extension headers of incoming packets */
if ((options & F_VERBOSE) != 0) {
int opton = 1;
#ifdef IPV6_RECVRTHDR
if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVRTHDR, &opton,
sizeof(opton)))
err(1, "setsockopt(IPV6_RECVRTHDR)");
#else /* old adv. API */
if (setsockopt(s, IPPROTO_IPV6, IPV6_RTHDR, &opton,
sizeof(opton)))
err(1, "setsockopt(IPV6_RTHDR)");
#endif
}
/*
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");
*/
/* Specify the outgoing interface and/or the source address */
if (usepktinfo)
ip6optlen += CMSG_SPACE(sizeof(struct in6_pktinfo));
if (hoplimit != -1)
ip6optlen += CMSG_SPACE(sizeof(int));
/* set IP6 packet options */
if (ip6optlen) {
if ((scmsg = (char *)malloc(ip6optlen)) == NULL)
errx(1, "can't allocate enough memory");
smsghdr.msg_control = (caddr_t)scmsg;
smsghdr.msg_controllen = ip6optlen;
scmsgp = (struct cmsghdr *)scmsg;
}
if (usepktinfo) {
pktinfo = (struct in6_pktinfo *)(CMSG_DATA(scmsgp));
memset(pktinfo, 0, sizeof(*pktinfo));
scmsgp->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo));
scmsgp->cmsg_level = IPPROTO_IPV6;
scmsgp->cmsg_type = IPV6_PKTINFO;
scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp);
}
/* set the outgoing interface */
if (ifname) {
#ifndef USE_SIN6_SCOPE_ID
/* pktinfo must have already been allocated */
if ((pktinfo->ipi6_ifindex = if_nametoindex(ifname)) == 0)
errx(1, "%s: invalid interface name", ifname);
#else
if ((dst.sin6_scope_id = 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;
#ifdef USE_RFC2292BIS
int rthdrlen;
#endif
#ifdef USE_RFC2292BIS
rthdrlen = inet6_rth_space(IPV6_RTHDR_TYPE_0, argc - 1);
scmsgp->cmsg_len = CMSG_LEN(rthdrlen);
scmsgp->cmsg_level = IPPROTO_IPV6;
scmsgp->cmsg_type = IPV6_RTHDR;
rthdr = (struct ip6_rthdr *)CMSG_DATA(scmsgp);
rthdr = inet6_rth_init((void *)rthdr, rthdrlen,
IPV6_RTHDR_TYPE_0, argc - 1);
if (rthdr == NULL)
errx(1, "can't initialize rthdr");
#else /* old advanced API */
if ((scmsgp = (struct cmsghdr *)inet6_rthdr_init(scmsgp,
IPV6_RTHDR_TYPE_0)) == NULL)
errx(1, "can't initialize rthdr");
#endif /* USE_RFC2292BIS */
for (hops = 0; hops < argc - 1; hops++) {
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_INET6;
if ((error = getaddrinfo(argv[hops], NULL, &hints,
&res)))
errx(1, "%s", gai_strerror(error));
if (res->ai_addr->sa_family != AF_INET6)
errx(1,
"bad addr family of an intermediate addr");
sin6 = (struct sockaddr_in6 *)(void *)res->ai_addr;
#ifdef USE_RFC2292BIS
if (inet6_rth_add(rthdr, &sin6->sin6_addr))
errx(1, "can't add an intermediate node");
#else /* old advanced API */
if (inet6_rthdr_add(scmsg, &sin6->sin6_addr,
IPV6_RTHDR_LOOSE))
errx(1, "can't add an intermediate node");
#endif /* USE_RFC2292BIS */
freeaddrinfo(res);
}
#ifndef USE_RFC2292BIS
if (inet6_rthdr_lasthop(scmsgp, IPV6_RTHDR_LOOSE))
errx(1, "can't set the last flag");
#endif
scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp);
}
if (!(options & F_SRCADDR)) {
/*
* get the source address. XXX since we revoked the root
* privilege, we cannot use a raw socket for this.
*/
int dummy;
socklen_t 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);
src.sin6_scope_id = dst.sin6_scope_id;
#ifdef USE_RFC2292BIS
if (pktinfo &&
setsockopt(dummy, IPPROTO_IPV6, IPV6_PKTINFO,
(void *)pktinfo, sizeof(*pktinfo)))
err(1, "UDP setsockopt(IPV6_PKTINFO)");
if (hoplimit != -1 &&
setsockopt(dummy, IPPROTO_IPV6, IPV6_UNICAST_HOPS,
(void *)&hoplimit, sizeof(hoplimit)))
err(1, "UDP setsockopt(IPV6_UNICAST_HOPS)");
if (hoplimit != -1 &&
setsockopt(dummy, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
(void *)&hoplimit, sizeof(hoplimit)))
err(1, "UDP setsockopt(IPV6_MULTICAST_HOPS)");
if (rthdr &&
setsockopt(dummy, IPPROTO_IPV6, IPV6_RTHDR,
(void *)rthdr, (rthdr->ip6r_len + 1) << 3))
err(1, "UDP setsockopt(IPV6_RTHDR)");
#else /* old advanced API */
if (smsghdr.msg_control &&
setsockopt(dummy, IPPROTO_IPV6, IPV6_PKTOPTIONS,
(void *)smsghdr.msg_control, smsghdr.msg_controllen))
err(1, "UDP setsockopt(IPV6_PKTOPTIONS)");
#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 > (size_t)sockbufsize)
warnx("you need -b to increase 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 USE_SIN6_SCOPE_ID
#ifdef IPV6_RECVPKTINFO
if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVPKTINFO, &optval,
sizeof(optval)) < 0)
warn("setsockopt(IPV6_RECVPKTINFO)"); /* XXX err? */
#else /* old adv. API */
if (setsockopt(s, IPPROTO_IPV6, IPV6_PKTINFO, &optval,
sizeof(optval)) < 0)
warn("setsockopt(IPV6_PKTINFO)"); /* XXX err? */
#endif
#endif /* USE_SIN6_SCOPE_ID */
#ifdef IPV6_RECVHOPLIMIT
if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, &optval,
sizeof(optval)) < 0)
warn("setsockopt(IPV6_RECVHOPLIMIT)"); /* XXX err? */
#else /* old adv. API */
if (setsockopt(s, IPPROTO_IPV6, IPV6_HOPLIMIT, &optval,
sizeof(optval)) < 0)
warn("setsockopt(IPV6_HOPLIMIT)"); /* XXX err? */
#endif
printf("PING6(%lu=40+8+%lu bytes) ", (unsigned long)(40 + pingerlen()),
(unsigned long)(pingerlen() - 8));
printf("%s --> ", pr_addr((struct sockaddr *)&src, sizeof(src)));
printf("%s\n", pr_addr((struct sockaddr *)&dst, sizeof(dst)));
if (preload == 0)
pinger();
else {
if (npackets != 0 && preload > npackets)
preload = npackets;
while (preload--)
pinger();
}
gettimeofday(&last, NULL);
sigemptyset(&si_sa.sa_mask);
si_sa.sa_flags = 0;
si_sa.sa_handler = onsignal;
if (sigaction(SIGINT, &si_sa, 0) == -1)
err(EX_OSERR, "sigaction SIGINT");
seenint = 0;
#ifdef SIGINFO
if (sigaction(SIGINFO, &si_sa, 0) == -1)
err(EX_OSERR, "sigaction SIGINFO");
seeninfo = 0;
#endif
if (alarmtimeout > 0) {
if (sigaction(SIGALRM, &si_sa, 0) == -1)
err(EX_OSERR, "sigaction SIGALRM");
}
if (options & F_FLOOD) {
intvl.tv_sec = 0;
intvl.tv_usec = 10000;
} else if ((options & F_INTERVAL) == 0) {
intvl.tv_sec = interval / 1000;
intvl.tv_usec = interval % 1000 * 1000;
}
almost_done = 0;
while (seenint == 0) {
struct timeval now, timeout;
struct msghdr m;
struct iovec iov[2];
fd_set rfds;
int n;
/* signal handling */
if (seenint)
onint(SIGINT);
#ifdef SIGINFO
if (seeninfo) {
summary();
seeninfo = 0;
continue;
}
#endif
FD_ZERO(&rfds);
FD_SET(s, &rfds);
gettimeofday(&now, NULL);
timeout.tv_sec = last.tv_sec + intvl.tv_sec - now.tv_sec;
timeout.tv_usec = last.tv_usec + intvl.tv_usec - now.tv_usec;
while (timeout.tv_usec < 0) {
timeout.tv_usec += 1000000;
timeout.tv_sec--;
}
while (timeout.tv_usec > 1000000) {
timeout.tv_usec -= 1000000;
timeout.tv_sec++;
}
if (timeout.tv_sec < 0)
timeout.tv_sec = timeout.tv_usec = 0;
n = select(s + 1, &rfds, NULL, NULL, &timeout);
if (n < 0)
continue; /* EINTR */
if (n == 1) {
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;
memset(cm, 0, CONTROLLEN);
m.msg_control = (void *)cm;
m.msg_controllen = CONTROLLEN;
cc = recvmsg(s, &m, 0);
if (cc < 0) {
if (errno != EINTR) {
warn("recvmsg");
sleep(1);
}
continue;
} else if (cc == 0) {
int mtu;
/*
* receive control messages only. Process the
* exceptions (currently the only possibility is
* a path MTU notification.)
*/
if ((mtu = get_pathmtu(&m)) > 0) {
if ((options & F_VERBOSE) != 0) {
printf("new path MTU (%d) is "
"notified\n", mtu);
}
}
continue;
} else {
/*
* an ICMPv6 message (probably an echoreply)
* arrived.
*/
pr_pack(packet, cc, &m);
}
if (((options & F_ONCE) != 0 && nreceived > 0) ||
(npackets > 0 && nreceived >= npackets))
break;
}
if (n == 0 || (options & F_FLOOD)) {
if (npackets == 0 || ntransmitted < npackets)
pinger();
else {
if (almost_done)
break;
almost_done = 1;
/*
* If we're not transmitting any more packets,
* change the timer to wait two round-trip times
* if we've received any packets or (waittime)
* milliseconds if we haven't.
*/
intvl.tv_usec = 0;
if (nreceived) {
intvl.tv_sec = 2 * tmax / 1000;
if (intvl.tv_sec == 0)
intvl.tv_sec = 1;
} else {
intvl.tv_sec = waittime / 1000;
intvl.tv_usec = waittime % 1000 * 1000;
}
}
gettimeofday(&last, NULL);
if (ntransmitted - nreceived - 1 > nmissedmax) {
nmissedmax = ntransmitted - nreceived - 1;
if (options & F_MISSED)
(void)write(STDOUT_FILENO, &BBELL, 1);
}
}
}
sigemptyset(&si_sa.sa_mask);
si_sa.sa_flags = 0;
si_sa.sa_handler = SIG_IGN;
sigaction(SIGINT, &si_sa, 0);
sigaction(SIGALRM, &si_sa, 0);
summary();
if(packet != NULL)
free(packet);
exit(nreceived == 0 ? 2 : 0);
}
static void
onsignal(int sig)
{
switch (sig) {
case SIGINT:
case SIGALRM:
seenint++;
break;
#ifdef SIGINFO
case SIGINFO:
seeninfo++;
break;
#endif
}
}
/*
* 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.
*/
static size_t
pingerlen(void)
{
size_t l;
if (options & F_FQDN)
l = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
else if (options & F_FQDNOLD)
l = ICMP6_NIQLEN;
else if (options & F_NODEADDR)
l = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
else if (options & F_SUPTYPES)
l = ICMP6_NIQLEN;
else
l = ICMP6ECHOLEN + datalen;
return l;
}
static int
pinger(void)
{
struct icmp6_hdr *icp;
struct iovec iov[2];
int i, cc;
struct icmp6_nodeinfo *nip;
int seq;
if (npackets && ntransmitted >= npackets)
return(-1); /* no more transmission */
icp = (struct icmp6_hdr *)outpack;
nip = (struct icmp6_nodeinfo *)outpack;
memset(icp, 0, sizeof(*icp));
icp->icmp6_cksum = 0;
seq = ntransmitted++;
CLR(seq % mx_dup_ck);
if (options & F_FQDN) {
icp->icmp6_type = ICMP6_NI_QUERY;
icp->icmp6_code = ICMP6_NI_SUBJ_IPV6;
nip->ni_qtype = htons(NI_QTYPE_FQDN);
nip->ni_flags = htons(0);
memcpy(nip->icmp6_ni_nonce, nonce,
sizeof(nip->icmp6_ni_nonce));
*(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);
memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr,
sizeof(dst.sin6_addr));
cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
datalen = 0;
} else if (options & F_FQDNOLD) {
/* packet format in 03 draft - no Subject data on queries */
icp->icmp6_type = ICMP6_NI_QUERY;
icp->icmp6_code = 0; /* code field is always 0 */
nip->ni_qtype = htons(NI_QTYPE_FQDN);
nip->ni_flags = htons(0);
memcpy(nip->icmp6_ni_nonce, nonce,
sizeof(nip->icmp6_ni_nonce));
*(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);
cc = ICMP6_NIQLEN;
datalen = 0;
} else if (options & F_NODEADDR) {
icp->icmp6_type = ICMP6_NI_QUERY;
icp->icmp6_code = ICMP6_NI_SUBJ_IPV6;
nip->ni_qtype = htons(NI_QTYPE_NODEADDR);
nip->ni_flags = naflags;
memcpy(nip->icmp6_ni_nonce, nonce,
sizeof(nip->icmp6_ni_nonce));
*(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);
memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr,
sizeof(dst.sin6_addr));
cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
datalen = 0;
} else if (options & F_SUPTYPES) {
icp->icmp6_type = ICMP6_NI_QUERY;
icp->icmp6_code = ICMP6_NI_SUBJ_FQDN; /*empty*/
nip->ni_qtype = htons(NI_QTYPE_SUPTYPES);
/* we support compressed bitmap */
nip->ni_flags = NI_SUPTYPE_FLAG_COMPRESS;
memcpy(nip->icmp6_ni_nonce, nonce,
sizeof(nip->icmp6_ni_nonce));
*(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);
cc = ICMP6_NIQLEN;
datalen = 0;
} else {
icp->icmp6_type = ICMP6_ECHO_REQUEST;
icp->icmp6_code = 0;
icp->icmp6_id = htons(ident);
icp->icmp6_seq = ntohs(seq);
if (timing) {
struct timeval tv;
struct tv32 *tv32;
(void)gettimeofday(&tv, NULL);
tv32 = (struct tv32 *)&outpack[ICMP6ECHOLEN];
tv32->tv32_sec = htonl(tv.tv_sec);
tv32->tv32_usec = htonl(tv.tv_usec);
}
cc = ICMP6ECHOLEN + datalen;
}
#ifdef DIAGNOSTIC
if (pingerlen() != cc)
errx(1, "internal error; length mismatch");
#endif
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);
return(0);
}
static int
myechoreply(const struct icmp6_hdr *icp)
{
if (ntohs(icp->icmp6_id) == ident)
return 1;
else
return 0;
}
static int
mynireply(const struct icmp6_nodeinfo *nip)
{
if (memcmp(nip->icmp6_ni_nonce + sizeof(u_int16_t),
nonce + sizeof(u_int16_t),
sizeof(nonce) - sizeof(u_int16_t)) == 0)
return 1;
else
return 0;
}
static char *
dnsdecode(const u_char **sp, const u_char *ep, const u_char *base, char *buf,
size_t bufsiz)
/*base for compressed name*/
{
int i;
const u_char *cp;
char cresult[MAXDNAME + 1];
const u_char *comp;
int l;
cp = *sp;
*buf = '\0';
if (cp >= ep)
return NULL;
while (cp < ep) {
i = *cp;
if (i == 0 || cp != *sp) {
if (strlcat((char *)buf, ".", bufsiz) >= bufsiz)
return NULL; /*result overrun*/
}
if (i == 0)
break;
cp++;
if ((i & 0xc0) == 0xc0 && cp - base > (i & 0x3f)) {
/* DNS compression */
if (!base)
return NULL;
comp = base + (i & 0x3f);
if (dnsdecode(&comp, cp, base, cresult,
sizeof(cresult)) == NULL)
return NULL;
if (strlcat(buf, cresult, bufsiz) >= bufsiz)
return NULL; /*result overrun*/
break;
} else if ((i & 0x3f) == i) {
if (i > ep - cp)
return NULL; /*source overrun*/
while (i-- > 0 && cp < ep) {
l = snprintf(cresult, sizeof(cresult),
isprint(*cp) ? "%c" : "\\%03o", *cp & 0xff);
if ((size_t)l >= sizeof(cresult) || l < 0)
return NULL;
if (strlcat(buf, cresult, bufsiz) >= bufsiz)
return NULL; /*result overrun*/
cp++;
}
} else
return NULL; /*invalid label*/
}
if (i != 0)
return NULL; /*not terminated*/
cp++;
*sp = cp;
return buf;
}
/*
* 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!).
*/
static void
pr_pack(u_char *buf, int cc, struct msghdr *mhdr)
{
#define safeputc(c) printf((isprint((c)) ? "%c" : "\\%03o"), c)
struct icmp6_hdr *icp;
struct icmp6_nodeinfo *ni;
int i;
int hoplim;
struct sockaddr *from;
int fromlen;
u_char *cp = NULL, *dp, *end = buf + cc;
struct in6_pktinfo *pktinfo = NULL;
struct timeval tv, tp;
struct tv32 *tpp;
double triptime = 0;
int dupflag;
size_t off;
int oldfqdn;
u_int16_t seq;
char dnsname[MAXDNAME + 1];
(void)gettimeofday(&tv, NULL);
if (!mhdr || !mhdr->msg_name ||
mhdr->msg_namelen != sizeof(struct sockaddr_in6) ||
((struct sockaddr *)mhdr->msg_name)->sa_family != AF_INET6) {
if (options & F_VERBOSE)
warnx("invalid peername");
return;
}
from = (struct sockaddr *)mhdr->msg_name;
fromlen = mhdr->msg_namelen;
if (cc < (int)sizeof(struct icmp6_hdr)) {
if (options & F_VERBOSE)
warnx("packet too short (%d bytes) from %s", cc,
pr_addr(from, fromlen));
return;
}
if (((mhdr->msg_flags & MSG_CTRUNC) != 0) &&
(options & F_VERBOSE) != 0)
warnx("some control data discarded, insufficient buffer size");
icp = (struct icmp6_hdr *)buf;
ni = (struct icmp6_nodeinfo *)buf;
off = 0;
if ((hoplim = get_hoplim(mhdr)) == -1) {
warnx("failed to get receiving hop limit");
return;
}
if ((pktinfo = get_rcvpktinfo(mhdr)) == NULL) {
warnx("failed to get receiving packet information");
return;
}
if (icp->icmp6_type == ICMP6_ECHO_REPLY && myechoreply(icp)) {
seq = ntohs(icp->icmp6_seq);
++nreceived;
if (timing) {
tpp = (struct tv32 *)(icp + 1);
tp.tv_sec = ntohl(tpp->tv32_sec);
tp.tv_usec = ntohl(tpp->tv32_usec);
tvsub(&tv, &tp);
triptime = ((double)tv.tv_sec) * 1000.0 +
((double)tv.tv_usec) / 1000.0;
tsum += triptime;
tsumsq += triptime * triptime;
if (triptime < tmin)
tmin = triptime;
if (triptime > tmax)
tmax = triptime;
}
if (TST(seq % mx_dup_ck)) {
++nrepeats;
--nreceived;
dupflag = 1;
} else {
SET(seq % mx_dup_ck);
dupflag = 0;
}
if (options & F_QUIET)
return;
if (options & F_WAITTIME && triptime > waittime) {
++nrcvtimeout;
return;
}
if (options & F_FLOOD)
(void)write(STDOUT_FILENO, &BSPACE, 1);
else {
if (options & F_AUDIBLE)
(void)write(STDOUT_FILENO, &BBELL, 1);
(void)printf("%d bytes from %s, icmp_seq=%u", cc,
pr_addr(from, fromlen), seq);
(void)printf(" hlim=%d", hoplim);
if ((options & F_VERBOSE) != 0) {
struct sockaddr_in6 dstsa;
memset(&dstsa, 0, sizeof(dstsa));
dstsa.sin6_family = AF_INET6;
dstsa.sin6_len = sizeof(dstsa);
dstsa.sin6_scope_id = pktinfo->ipi6_ifindex;
dstsa.sin6_addr = pktinfo->ipi6_addr;
(void)printf(" dst=%s",
pr_addr((struct sockaddr *)&dstsa,
sizeof(dstsa)));
}
if (timing)
(void)printf(" time=%.3f 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 && mynireply(ni)) {
seq = ntohs(*(u_int16_t *)ni->icmp6_ni_nonce);
++nreceived;
if (TST(seq % mx_dup_ck)) {
++nrepeats;
--nreceived;
dupflag = 1;
} else {
SET(seq % mx_dup_ck);
dupflag = 0;
}
if (options & F_QUIET)
return;
(void)printf("%d bytes from %s: ", cc, pr_addr(from, fromlen));
switch (ntohs(ni->ni_code)) {
case ICMP6_NI_SUCCESS:
break;
case ICMP6_NI_REFUSED:
printf("refused, type 0x%x", ntohs(ni->ni_type));
goto fqdnend;
case ICMP6_NI_UNKNOWN:
printf("unknown, type 0x%x", ntohs(ni->ni_type));
goto fqdnend;
default:
printf("unknown code 0x%x, type 0x%x",
ntohs(ni->ni_code), ntohs(ni->ni_type));
goto fqdnend;
}
switch (ntohs(ni->ni_qtype)) {
case NI_QTYPE_NOOP:
printf("NodeInfo NOOP");
break;
case NI_QTYPE_SUPTYPES:
pr_suptypes(ni, end - (u_char *)ni);
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;
if (buf[off + ICMP6_NIRLEN] ==
cc - off - ICMP6_NIRLEN - 1)
oldfqdn = 1;
else
oldfqdn = 0;
if (oldfqdn) {
cp++; /* skip length */
while (cp < end) {
safeputc(*cp & 0xff);
cp++;
}
} else {
i = 0;
while (cp < end) {
if (dnsdecode((const u_char **)&cp, end,
(const u_char *)(ni + 1), dnsname,
sizeof(dnsname)) == NULL) {
printf("???");
break;
}
/*
* name-lookup special handling for
* truncated name
*/
if (cp + 1 <= end && !*cp &&
strlen(dnsname) > 0) {
dnsname[strlen(dnsname) - 1] = '\0';
cp++;
}
printf("%s%s", i > 0 ? "," : "",
dnsname);
}
}
if (options & F_VERBOSE) {
int32_t ttl;
int comma = 0;
(void)printf(" ("); /*)*/
switch (ni->ni_code) {
case ICMP6_NI_REFUSED:
(void)printf("refused");
comma++;
break;
case ICMP6_NI_UNKNOWN:
(void)printf("unknown qtype");
comma++;
break;
}
if ((end - (u_char *)ni) < ICMP6_NIRLEN) {
/* case of refusion, unknown */
/*(*/
putchar(')');
goto fqdnend;
}
ttl = (int32_t)ntohl(*(u_long *)&buf[off+ICMP6ECHOLEN+8]);
if (comma)
printf(",");
if (!(ni->ni_flags & NI_FQDN_FLAG_VALIDTTL)) {
(void)printf("TTL=%d:meaningless",
(int)ttl);
} else {
if (ttl < 0) {
(void)printf("TTL=%d:invalid",
ttl);
} else
(void)printf("TTL=%d", ttl);
}
comma++;
if (oldfqdn) {
if (comma)
printf(",");
printf("03 draft");
comma++;
} else {
cp = (u_char *)ni + ICMP6_NIRLEN;
if (cp == end) {
if (comma)
printf(",");
printf("no name");
comma++;
}
}
if (buf[off + ICMP6_NIRLEN] !=
cc - off - ICMP6_NIRLEN - 1 && oldfqdn) {
if (comma)
printf(",");
(void)printf("invalid namelen:%d/%lu",
buf[off + ICMP6_NIRLEN],
(u_long)cc - off - ICMP6_NIRLEN - 1);
comma++;
}
/*(*/
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, fromlen));
pr_icmph(icp, end);
}
if (!(options & F_FLOOD)) {
(void)putchar('\n');
if (options & F_VERBOSE)
pr_exthdrs(mhdr);
(void)fflush(stdout);
}
#undef safeputc
}
static void
pr_exthdrs(struct msghdr *mhdr)
{
ssize_t bufsize;
void *bufp;
struct cmsghdr *cm;
bufsize = 0;
bufp = mhdr->msg_control;
for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
if (cm->cmsg_level != IPPROTO_IPV6)
continue;
bufsize = CONTROLLEN - ((caddr_t)CMSG_DATA(cm) - (caddr_t)bufp);
if (bufsize <= 0)
continue;
switch (cm->cmsg_type) {
case IPV6_HOPOPTS:
printf(" HbH Options: ");
pr_ip6opt(CMSG_DATA(cm), (size_t)bufsize);
break;
case IPV6_DSTOPTS:
#ifdef IPV6_RTHDRDSTOPTS
case IPV6_RTHDRDSTOPTS:
#endif
printf(" Dst Options: ");
pr_ip6opt(CMSG_DATA(cm), (size_t)bufsize);
break;
case IPV6_RTHDR:
printf(" Routing: ");
pr_rthdr(CMSG_DATA(cm), (size_t)bufsize);
break;
}
}
}
#ifdef USE_RFC2292BIS
static void
pr_ip6opt(void *extbuf, size_t bufsize)
{
struct ip6_hbh *ext;
int currentlen;
u_int8_t type;
socklen_t extlen, len;
void *databuf;
size_t offset;
u_int16_t value2;
u_int32_t value4;
ext = (struct ip6_hbh *)extbuf;
extlen = (ext->ip6h_len + 1) * 8;
printf("nxt %u, len %u (%lu bytes)\n", ext->ip6h_nxt,
(unsigned int)ext->ip6h_len, (unsigned long)extlen);
/*
* Bounds checking on the ancillary data buffer:
* subtract the size of a cmsg structure from the buffer size.
*/
if (bufsize < (extlen + CMSG_SPACE(0))) {
extlen = bufsize - CMSG_SPACE(0);
warnx("options truncated, showing only %u (total=%u)",
(unsigned int)(extlen / 8 - 1),
(unsigned int)(ext->ip6h_len));
}
currentlen = 0;
while (1) {
currentlen = inet6_opt_next(extbuf, extlen, currentlen,
&type, &len, &databuf);
if (currentlen == -1)
break;
switch (type) {
/*
* Note that inet6_opt_next automatically skips any padding
* optins.
*/
case IP6OPT_JUMBO:
offset = 0;
offset = inet6_opt_get_val(databuf, offset,
&value4, sizeof(value4));
printf(" Jumbo Payload Opt: Length %u\n",
(u_int32_t)ntohl(value4));
break;
case IP6OPT_ROUTER_ALERT:
offset = 0;
offset = inet6_opt_get_val(databuf, offset,
&value2, sizeof(value2));
printf(" Router Alert Opt: Type %u\n",
ntohs(value2));
break;
default:
printf(" Received Opt %u len %lu\n",
type, (unsigned long)len);
break;
}
}
return;
}
#else /* !USE_RFC2292BIS */
/* ARGSUSED */
static void
pr_ip6opt(void *extbuf, size_t bufsize __unused)
{
putchar('\n');
return;
}
#endif /* USE_RFC2292BIS */
#ifdef USE_RFC2292BIS
static void
pr_rthdr(void *extbuf, size_t bufsize)
{
struct in6_addr *in6;
char ntopbuf[INET6_ADDRSTRLEN];
struct ip6_rthdr *rh = (struct ip6_rthdr *)extbuf;
int i, segments, origsegs, rthsize, size0, size1;
/* print fixed part of the header */
printf("nxt %u, len %u (%d bytes), type %u, ", rh->ip6r_nxt,
rh->ip6r_len, (rh->ip6r_len + 1) << 3, rh->ip6r_type);
if ((segments = inet6_rth_segments(extbuf)) >= 0) {
printf("%d segments, ", segments);
printf("%d left\n", rh->ip6r_segleft);
} else {
printf("segments unknown, ");
printf("%d left\n", rh->ip6r_segleft);
return;
}
/*
* Bounds checking on the ancillary data buffer. When calculating
* the number of items to show keep in mind:
* - The size of the cmsg structure
* - The size of one segment (the size of a Type 0 routing header)
* - When dividing add a fudge factor of one in case the
* dividend is not evenly divisible by the divisor
*/
rthsize = (rh->ip6r_len + 1) * 8;
if (bufsize < (rthsize + CMSG_SPACE(0))) {
origsegs = segments;
size0 = inet6_rth_space(IPV6_RTHDR_TYPE_0, 0);
size1 = inet6_rth_space(IPV6_RTHDR_TYPE_0, 1);
segments -= (rthsize - (bufsize - CMSG_SPACE(0))) /
(size1 - size0) + 1;
warnx("segments truncated, showing only %d (total=%d)",
segments, origsegs);
}
for (i = 0; i < segments; i++) {
in6 = inet6_rth_getaddr(extbuf, i);
if (in6 == NULL)
printf(" [%d]<NULL>\n", i);
else {
if (!inet_ntop(AF_INET6, in6, ntopbuf,
sizeof(ntopbuf)))
strlcpy(ntopbuf, "?", sizeof(ntopbuf));
printf(" [%d]%s\n", i, ntopbuf);
}
}
return;
}
#else /* !USE_RFC2292BIS */
/* ARGSUSED */
static void
pr_rthdr(void *extbuf, size_t bufsize __unused)
{
putchar('\n');
return;
}
#endif /* USE_RFC2292BIS */
static int
pr_bitrange(u_int32_t v, int soff, int ii)
{
int off;
int i;
off = 0;
while (off < 32) {
/* shift till we have 0x01 */
if ((v & 0x01) == 0) {
if (ii > 1)
printf("-%u", soff + off - 1);
ii = 0;
switch (v & 0x0f) {
case 0x00:
v >>= 4;
off += 4;
continue;
case 0x08:
v >>= 3;
off += 3;
continue;
case 0x04: case 0x0c:
v >>= 2;
off += 2;
continue;
default:
v >>= 1;
off += 1;
continue;
}
}
/* we have 0x01 with us */
for (i = 0; i < 32 - off; i++) {
if ((v & (0x01 << i)) == 0)
break;
}
if (!ii)
printf(" %u", soff + off);
ii += i;
v >>= i; off += i;
}
return ii;
}
static void
pr_suptypes(struct icmp6_nodeinfo *ni, size_t nilen)
/* ni->qtype must be SUPTYPES */
{
size_t clen;
u_int32_t v;
const u_char *cp, *end;
u_int16_t cur;
struct cbit {
u_int16_t words; /*32bit count*/
u_int16_t skip;
} cbit;
#define MAXQTYPES (1 << 16)
size_t off;
int b;
cp = (u_char *)(ni + 1);
end = ((u_char *)ni) + nilen;
cur = 0;
b = 0;
printf("NodeInfo Supported Qtypes");
if (options & F_VERBOSE) {
if (ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS)
printf(", compressed bitmap");
else
printf(", raw bitmap");
}
while (cp < end) {
clen = (size_t)(end - cp);
if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) == 0) {
if (clen == 0 || clen > MAXQTYPES / 8 ||
clen % sizeof(v)) {
printf("???");
return;
}
} else {
if (clen < sizeof(cbit) || clen % sizeof(v))
return;
memcpy(&cbit, cp, sizeof(cbit));
if (sizeof(cbit) + ntohs(cbit.words) * sizeof(v) >
clen)
return;
cp += sizeof(cbit);
clen = ntohs(cbit.words) * sizeof(v);
if (cur + clen * 8 + (u_long)ntohs(cbit.skip) * 32 >
MAXQTYPES)
return;
}
for (off = 0; off < clen; off += sizeof(v)) {
memcpy(&v, cp + off, sizeof(v));
v = (u_int32_t)ntohl(v);
b = pr_bitrange(v, (int)(cur + off * 8), b);
}
/* flush the remaining bits */
b = pr_bitrange(0, (int)(cur + off * 8), b);
cp += clen;
cur += clen * 8;
if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) != 0)
cur += ntohs(cbit.skip) * 32;
}
}
static void
pr_nodeaddr(struct icmp6_nodeinfo *ni, int nilen)
/* ni->qtype must be NODEADDR */
{
u_char *cp = (u_char *)(ni + 1);
char ntop_buf[INET6_ADDRSTRLEN];
int withttl = 0;
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_TRUNCATE)
(void)printf(" truncated");
}
putchar('\n');
if (nilen <= 0)
printf(" no address\n");
/*
* In icmp-name-lookups 05 and later, TTL of each returned address
* is contained in the resposne. We try to detect the version
* by the length of the data, but note that the detection algorithm
* is incomplete. We assume the latest draft by default.
*/
if (nilen % (sizeof(u_int32_t) + sizeof(struct in6_addr)) == 0)
withttl = 1;
while (nilen > 0) {
u_int32_t ttl;
if (withttl) {
/* XXX: alignment? */
ttl = (u_int32_t)ntohl(*(u_int32_t *)cp);
cp += sizeof(u_int32_t);
nilen -= sizeof(u_int32_t);
}
if (inet_ntop(AF_INET6, cp, ntop_buf, sizeof(ntop_buf)) ==
NULL)
strlcpy(ntop_buf, "?", sizeof(ntop_buf));
printf(" %s", ntop_buf);
if (withttl) {
if (ttl == 0xffffffff) {
/*
* XXX: can this convention be applied to all
* type of TTL (i.e. non-ND TTL)?
*/
printf("(TTL=infty)");
}
else
printf("(TTL=%u)", ttl);
}
putchar('\n');
nilen -= sizeof(struct in6_addr);
cp += sizeof(struct in6_addr);
}
}
static int
get_hoplim(struct msghdr *mhdr)
{
struct cmsghdr *cm;
for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
if (cm->cmsg_len == 0)
return(-1);
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);
}
static struct in6_pktinfo *
get_rcvpktinfo(struct msghdr *mhdr)
{
struct cmsghdr *cm;
for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
if (cm->cmsg_len == 0)
return(NULL);
if (cm->cmsg_level == IPPROTO_IPV6 &&
cm->cmsg_type == IPV6_PKTINFO &&
cm->cmsg_len == CMSG_LEN(sizeof(struct in6_pktinfo)))
return((struct in6_pktinfo *)CMSG_DATA(cm));
}
return(NULL);
}
static int
get_pathmtu(struct msghdr *mhdr)
{
#ifdef IPV6_RECVPATHMTU
struct cmsghdr *cm;
struct ip6_mtuinfo *mtuctl = NULL;
for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
if (cm->cmsg_len == 0)
return(0);
if (cm->cmsg_level == IPPROTO_IPV6 &&
cm->cmsg_type == IPV6_PATHMTU &&
cm->cmsg_len == CMSG_LEN(sizeof(struct ip6_mtuinfo))) {
mtuctl = (struct ip6_mtuinfo *)CMSG_DATA(cm);
/*
* If the notified destination is different from
* the one we are pinging, just ignore the info.
* We check the scope ID only when both notified value
* and our own value have non-0 values, because we may
* have used the default scope zone ID for sending,
* in which case the scope ID value is 0.
*/
if (!IN6_ARE_ADDR_EQUAL(&mtuctl->ip6m_addr.sin6_addr,
&dst.sin6_addr) ||
(mtuctl->ip6m_addr.sin6_scope_id &&
dst.sin6_scope_id &&
mtuctl->ip6m_addr.sin6_scope_id !=
dst.sin6_scope_id)) {
if ((options & F_VERBOSE) != 0) {
printf("path MTU for %s is notified. "
"(ignored)\n",
pr_addr((struct sockaddr *)&mtuctl->ip6m_addr,
sizeof(mtuctl->ip6m_addr)));
}
return(0);
}
/*
* Ignore an invalid MTU. XXX: can we just believe
* the kernel check?
*/
if (mtuctl->ip6m_mtu < IPV6_MMTU)
return(0);
/* notification for our destination. return the MTU. */
return((int)mtuctl->ip6m_mtu);
}
}
#endif
return(0);
}
/*
* tvsub --
* Subtract 2 timeval structs: out = out - in. Out is assumed to
* be >= in.
*/
static void
tvsub(struct timeval *out, struct timeval *in)
{
if ((out->tv_usec -= in->tv_usec) < 0) {
--out->tv_sec;
out->tv_usec += 1000000;
}
out->tv_sec -= in->tv_sec;
}
/*
* onint --
* SIGINT handler.
*/
/* ARGSUSED */
static void
onint(int notused __unused)
{
/*
* When doing reverse DNS lookups, the seenint flag might not
* be noticed for a while. Just exit if we get a second SIGINT.
*/
if ((options & F_HOSTNAME) && seenint != 0)
_exit(nreceived ? 0 : 2);
}
/*
* summary --
* Print out statistics.
*/
static void
summary(void)
{
(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 duplicating packets!");
else
(void)printf("%.1f%% packet loss",
((((double)ntransmitted - nreceived) * 100.0) /
ntransmitted));
}
if (nrcvtimeout)
printf(", %ld packets out of wait time", nrcvtimeout);
(void)putchar('\n');
if (nreceived && timing) {
/* Only display average to microseconds */
double num = nreceived + nrepeats;
double avg = tsum / num;
double dev = sqrt(tsumsq / num - avg * avg);
(void)printf(
"round-trip min/avg/max/std-dev = %.3f/%.3f/%.3f/%.3f ms\n",
tmin, avg, tmax, dev);
(void)fflush(stdout);
}
(void)fflush(stdout);
}
/*subject type*/
static const char *niqcode[] = {
"IPv6 address",
"DNS label", /*or empty*/
"IPv4 address",
};
/*result code*/
static const char *nircode[] = {
"Success", "Refused", "Unknown",
};
/*
* pr_icmph --
* Print a descriptive string about an ICMP header.
*/
static void
pr_icmph(struct icmp6_hdr *icp, u_char *end)
{
char ntop_buf[INET6_ADDRSTRLEN];
struct nd_redirect *red;
struct icmp6_nodeinfo *ni;
char dnsname[MAXDNAME + 1];
const u_char *cp;
size_t l;
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_BEYONDSCOPE:
(void)printf("Destination Unreachable Beyond Scope\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));
pr_retip((struct ip6_hdr *)(icp + 1), end);
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",
(u_int32_t)ntohl(icp->icmp6_pptr));
pr_retip((struct ip6_hdr *)(icp + 1), end);
break;
case ICMP6_ECHO_REQUEST:
(void)printf("Echo Request");
/* XXX ID + Seq + Data */
break;
case ICMP6_ECHO_REPLY:
(void)printf("Echo Reply");
/* XXX ID + Seq + Data */
break;
case ICMP6_MEMBERSHIP_QUERY:
(void)printf("Listener Query");
break;
case ICMP6_MEMBERSHIP_REPORT:
(void)printf("Listener Report");
break;
case ICMP6_MEMBERSHIP_REDUCTION:
(void)printf("Listener Done");
break;
case ND_ROUTER_SOLICIT:
(void)printf("Router Solicitation");
break;
case ND_ROUTER_ADVERT:
(void)printf("Router Advertisement");
break;
case ND_NEIGHBOR_SOLICIT:
(void)printf("Neighbor Solicitation");
break;
case ND_NEIGHBOR_ADVERT:
(void)printf("Neighbor Advertisement");
break;
case ND_REDIRECT:
red = (struct nd_redirect *)icp;
(void)printf("Redirect\n");
if (!inet_ntop(AF_INET6, &red->nd_rd_dst, ntop_buf,
sizeof(ntop_buf)))
strlcpy(ntop_buf, "?", sizeof(ntop_buf));
(void)printf("Destination: %s", ntop_buf);
if (!inet_ntop(AF_INET6, &red->nd_rd_target, ntop_buf,
sizeof(ntop_buf)))
strlcpy(ntop_buf, "?", sizeof(ntop_buf));
(void)printf(" New Target: %s", ntop_buf);
break;
case ICMP6_NI_QUERY:
(void)printf("Node Information Query");
/* XXX ID + Seq + Data */
ni = (struct icmp6_nodeinfo *)icp;
l = end - (u_char *)(ni + 1);
printf(", ");
switch (ntohs(ni->ni_qtype)) {
case NI_QTYPE_NOOP:
(void)printf("NOOP");
break;
case NI_QTYPE_SUPTYPES:
(void)printf("Supported qtypes");
break;
case NI_QTYPE_FQDN:
(void)printf("DNS name");
break;
case NI_QTYPE_NODEADDR:
(void)printf("nodeaddr");
break;
case NI_QTYPE_IPV4ADDR:
(void)printf("IPv4 nodeaddr");
break;
default:
(void)printf("unknown qtype");
break;
}
if (options & F_VERBOSE) {
switch (ni->ni_code) {
case ICMP6_NI_SUBJ_IPV6:
if (l == sizeof(struct in6_addr) &&
inet_ntop(AF_INET6, ni + 1, ntop_buf,
sizeof(ntop_buf)) != NULL) {
(void)printf(", subject=%s(%s)",
niqcode[ni->ni_code], ntop_buf);
} else {
#if 1
/* backward compat to -W */
(void)printf(", oldfqdn");
#else
(void)printf(", invalid");
#endif
}
break;
case ICMP6_NI_SUBJ_FQDN:
if (end == (u_char *)(ni + 1)) {
(void)printf(", no subject");
break;
}
printf(", subject=%s", niqcode[ni->ni_code]);
cp = (const u_char *)(ni + 1);
if (dnsdecode(&cp, end, NULL, dnsname,
sizeof(dnsname)) != NULL)
printf("(%s)", dnsname);
else
printf("(invalid)");
break;
case ICMP6_NI_SUBJ_IPV4:
if (l == sizeof(struct in_addr) &&
inet_ntop(AF_INET, ni + 1, ntop_buf,
sizeof(ntop_buf)) != NULL) {
(void)printf(", subject=%s(%s)",
niqcode[ni->ni_code], ntop_buf);
} else
(void)printf(", invalid");
break;
default:
(void)printf(", invalid");
break;
}
}
break;
case ICMP6_NI_REPLY:
(void)printf("Node Information Reply");
/* XXX ID + Seq + Data */
ni = (struct icmp6_nodeinfo *)icp;
printf(", ");
switch (ntohs(ni->ni_qtype)) {
case NI_QTYPE_NOOP:
(void)printf("NOOP");
break;
case NI_QTYPE_SUPTYPES:
(void)printf("Supported qtypes");
break;
case NI_QTYPE_FQDN:
(void)printf("DNS name");
break;
case NI_QTYPE_NODEADDR:
(void)printf("nodeaddr");
break;
case NI_QTYPE_IPV4ADDR:
(void)printf("IPv4 nodeaddr");
break;
default:
(void)printf("unknown qtype");
break;
}
if (options & F_VERBOSE) {
if (ni->ni_code > nitems(nircode))
printf(", invalid");
else
printf(", %s", nircode[ni->ni_code]);
}
break;
default:
(void)printf("Bad ICMP type: %d", icp->icmp6_type);
}
}
/*
* pr_iph --
* Print an IP6 header.
*/
static void
pr_iph(struct ip6_hdr *ip6)
{
u_int32_t flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK;
u_int8_t tc;
char ntop_buf[INET6_ADDRSTRLEN];
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, (u_int32_t)ntohl(flow),
ntohs(ip6->ip6_plen), ip6->ip6_nxt, ip6->ip6_hlim);
if (!inet_ntop(AF_INET6, &ip6->ip6_src, ntop_buf, sizeof(ntop_buf)))
strlcpy(ntop_buf, "?", sizeof(ntop_buf));
printf("%s->", ntop_buf);
if (!inet_ntop(AF_INET6, &ip6->ip6_dst, ntop_buf, sizeof(ntop_buf)))
strlcpy(ntop_buf, "?", sizeof(ntop_buf));
printf("%s\n", ntop_buf);
}
/*
* pr_addr --
* Return an ascii host address as a dotted quad and optionally with
* a hostname.
*/
static const char *
pr_addr(struct sockaddr *addr, int addrlen)
{
static char buf[NI_MAXHOST];
int flag = 0;
if ((options & F_HOSTNAME) == 0)
flag |= NI_NUMERICHOST;
if (getnameinfo(addr, addrlen, buf, sizeof(buf), NULL, 0, flag) == 0)
return (buf);
else
return "?";
}
/*
* pr_retip --
* Dump some info on a returned (via ICMPv6) IPv6 packet.
*/
static void
pr_retip(struct ip6_hdr *ip6, u_char *end)
{
u_char *cp = (u_char *)ip6, nh;
int hlen;
if ((size_t)(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;
#ifdef IPSEC
case IPPROTO_AH:
printf("AH ");
hlen = (((struct ah *)cp)->ah_len+2) << 2;
nh = ((struct ah *)cp)->ah_nxt;
break;
#endif
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;
}
static void
fill(char *bp, char *patp)
{
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;
(size_t)kk <= MAXDATALEN - 8 + sizeof(struct tv32) + 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");
}
}
#ifdef IPSEC
#ifdef IPSEC_POLICY_IPSEC
static int
setpolicy(int so __unused, char *policy)
{
char *buf;
if (policy == NULL)
return 0; /* ignore */
buf = ipsec_set_policy(policy, strlen(policy));
if (buf == NULL)
errx(1, "%s", ipsec_strerror());
if (setsockopt(s, IPPROTO_IPV6, IPV6_IPSEC_POLICY, buf,
ipsec_get_policylen(buf)) < 0)
warnx("Unable to set IPsec policy");
free(buf);
return 0;
}
#endif
#endif
static char *
nigroup(char *name, int nig_oldmcprefix)
{
char *p;
char *q;
MD5_CTX ctxt;
u_int8_t digest[16];
u_int8_t c;
size_t l;
char hbuf[NI_MAXHOST];
struct in6_addr in6;
int valid;
p = strchr(name, '.');
if (!p)
p = name + strlen(name);
l = p - name;
if (l > 63 || l > sizeof(hbuf) - 1)
return NULL; /*label too long*/
strncpy(hbuf, name, l);
hbuf[(int)l] = '\0';
for (q = name; *q; q++) {
if (isupper(*(unsigned char *)q))
*q = tolower(*(unsigned char *)q);
}
/* generate 16 bytes of pseudo-random value. */
memset(&ctxt, 0, sizeof(ctxt));
MD5Init(&ctxt);
c = l & 0xff;
MD5Update(&ctxt, &c, sizeof(c));
MD5Update(&ctxt, (unsigned char *)name, l);
MD5Final(digest, &ctxt);
if (nig_oldmcprefix) {
/* draft-ietf-ipngwg-icmp-name-lookup */
valid = inet_pton(AF_INET6, "ff02::2:0000:0000", &in6);
} else {
/* RFC 4620 */
valid = inet_pton(AF_INET6, "ff02::2:ff00:0000", &in6);
}
if (valid != 1)
return NULL; /*XXX*/
if (nig_oldmcprefix) {
/* draft-ietf-ipngwg-icmp-name-lookup */
bcopy(digest, &in6.s6_addr[12], 4);
} else {
/* RFC 4620 */
bcopy(digest, &in6.s6_addr[13], 3);
}
if (inet_ntop(AF_INET6, &in6, hbuf, sizeof(hbuf)) == NULL)
return NULL;
return strdup(hbuf);
}
static void
usage(void)
{
(void)fprintf(stderr,
#if defined(IPSEC) && !defined(IPSEC_POLICY_IPSEC)
"A"
#endif
"usage: ping6 [-"
"Dd"
#if defined(IPSEC) && !defined(IPSEC_POLICY_IPSEC)
"E"
#endif
"fH"
#ifdef IPV6_USE_MIN_MTU
"m"
#endif
"nNoqrRtvwW] "
"[-a addrtype] [-b bufsiz] [-c count] [-g gateway]\n"
" [-h hoplimit] [-I interface] [-i wait] [-l preload]"
#if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC)
" [-P policy]"
#endif
"\n"
" [-p pattern] [-S sourceaddr] [-s packetsize] "
"[-x waittime]\n"
" [-X timeout] [hops ...] host\n");
exit(1);
}
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