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tcpdump/print-icmp6.c

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/*
* Copyright (c) 1988, 1989, 1990, 1991, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that: (1) source code distributions
* retain the above copyright notice and this paragraph in its entirety, (2)
* distributions including binary code include the above copyright notice and
* this paragraph in its entirety in the documentation or other materials
* provided with the distribution, and (3) all advertising materials mentioning
* features or use of this software display the following acknowledgement:
* ``This product includes software developed by the University of California,
* Lawrence Berkeley Laboratory and its contributors.'' 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#ifndef lint
static const char rcsid[] =
"@(#) $Header: /tcpdump/master/tcpdump/print-icmp6.c,v 1.65 2002-09-05 00:52:30 guy Exp $";
#endif
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef INET6
#include <tcpdump-stdinc.h>
#include <stdio.h>
#include <string.h>
#include "ip6.h"
#include "icmp6.h"
#include "interface.h"
#include "addrtoname.h"
#include "udp.h"
#include "ah.h"
static const char *get_rtpref(u_int);
static const char *get_lifetime(u_int32_t);
static void print_lladdr(const u_char *, size_t);
void icmp6_opt_print(const u_char *, int);
void mld6_print(const u_char *);
static struct udphdr *get_upperlayer(u_char *, int *);
static void dnsname_print(const u_char *, const u_char *);
void icmp6_nodeinfo_print(int, const u_char *, const u_char *);
void icmp6_rrenum_print(int, const u_char *, const u_char *);
#ifndef abs
#define abs(a) ((0 < (a)) ? (a) : -(a))
#endif
static const char *
get_rtpref(u_int v)
{
static const char *rtpref_str[] = {
"medium", /* 00 */
"high", /* 01 */
"rsv", /* 10 */
"low" /* 11 */
};
return rtpref_str[((v & ND_RA_FLAG_RTPREF_MASK) >> 3) & 0xff];
}
static const char *
get_lifetime(u_int32_t v)
{
static char buf[20];
if (v == (u_int32_t)~0UL)
return "infinity";
else {
snprintf(buf, sizeof(buf), "%u", v);
return buf;
}
}
static void
print_lladdr(const u_int8_t *p, size_t l)
{
const u_int8_t *ep, *q;
q = p;
ep = p + l;
while (l > 0 && q < ep) {
if (q > p)
printf(":");
printf("%02x", *q++);
l--;
}
}
void
icmp6_print(const u_char *bp, const u_char *bp2)
{
const struct icmp6_hdr *dp;
const struct ip6_hdr *ip;
const char *str;
const struct ip6_hdr *oip;
const struct udphdr *ouh;
int dport;
const u_char *ep;
char buf[256];
int icmp6len, prot;
dp = (struct icmp6_hdr *)bp;
ip = (struct ip6_hdr *)bp2;
oip = (struct ip6_hdr *)(dp + 1);
str = buf;
/* 'ep' points to the end of available data. */
ep = snapend;
if (ip->ip6_plen)
icmp6len = (ntohs(ip->ip6_plen) + sizeof(struct ip6_hdr) -
(bp - bp2));
else /* XXX: jumbo payload case... */
icmp6len = snapend - bp;
TCHECK(dp->icmp6_code);
switch (dp->icmp6_type) {
case ICMP6_DST_UNREACH:
TCHECK(oip->ip6_dst);
switch (dp->icmp6_code) {
case ICMP6_DST_UNREACH_NOROUTE:
printf("icmp6: %s unreachable route",
ip6addr_string(&oip->ip6_dst));
break;
case ICMP6_DST_UNREACH_ADMIN:
printf("icmp6: %s unreachable prohibited",
ip6addr_string(&oip->ip6_dst));
break;
case ICMP6_DST_UNREACH_BEYONDSCOPE:
printf("icmp6: %s beyond scope of source address %s",
ip6addr_string(&oip->ip6_dst),
ip6addr_string(&oip->ip6_src));
break;
case ICMP6_DST_UNREACH_ADDR:
printf("icmp6: %s unreachable address",
ip6addr_string(&oip->ip6_dst));
break;
case ICMP6_DST_UNREACH_NOPORT:
if ((ouh = get_upperlayer((u_char *)oip, &prot))
== NULL)
goto trunc;
dport = ntohs(ouh->uh_dport);
switch (prot) {
case IPPROTO_TCP:
printf("icmp6: %s tcp port %s unreachable",
ip6addr_string(&oip->ip6_dst),
tcpport_string(dport));
break;
case IPPROTO_UDP:
printf("icmp6: %s udp port %s unreachable",
ip6addr_string(&oip->ip6_dst),
udpport_string(dport));
break;
default:
printf("icmp6: %s protocol %d port %d unreachable",
ip6addr_string(&oip->ip6_dst),
oip->ip6_nxt, dport);
break;
}
break;
default:
printf("icmp6: %s unreachable code-#%d",
ip6addr_string(&oip->ip6_dst),
dp->icmp6_code);
break;
}
break;
case ICMP6_PACKET_TOO_BIG:
TCHECK(dp->icmp6_mtu);
printf("icmp6: too big %u", (u_int32_t)ntohl(dp->icmp6_mtu));
break;
case ICMP6_TIME_EXCEEDED:
TCHECK(oip->ip6_dst);
switch (dp->icmp6_code) {
case ICMP6_TIME_EXCEED_TRANSIT:
printf("icmp6: time exceeded in-transit for %s",
ip6addr_string(&oip->ip6_dst));
break;
case ICMP6_TIME_EXCEED_REASSEMBLY:
printf("icmp6: ip6 reassembly time exceeded");
break;
default:
printf("icmp6: time exceeded code-#%d",
dp->icmp6_code);
break;
}
break;
case ICMP6_PARAM_PROB:
TCHECK(oip->ip6_dst);
switch (dp->icmp6_code) {
case ICMP6_PARAMPROB_HEADER:
printf("icmp6: parameter problem errorneous - octet %u",
(u_int32_t)ntohl(dp->icmp6_pptr));
break;
case ICMP6_PARAMPROB_NEXTHEADER:
printf("icmp6: parameter problem next header - octet %u",
(u_int32_t)ntohl(dp->icmp6_pptr));
break;
case ICMP6_PARAMPROB_OPTION:
printf("icmp6: parameter problem option - octet %u",
(u_int32_t)ntohl(dp->icmp6_pptr));
break;
default:
printf("icmp6: parameter problem code-#%d",
dp->icmp6_code);
break;
}
break;
case ICMP6_ECHO_REQUEST:
printf("icmp6: echo request");
break;
case ICMP6_ECHO_REPLY:
printf("icmp6: echo reply");
break;
case ICMP6_MEMBERSHIP_QUERY:
printf("icmp6: multicast listener query ");
mld6_print((const u_char *)dp);
break;
case ICMP6_MEMBERSHIP_REPORT:
printf("icmp6: multicast listener report ");
mld6_print((const u_char *)dp);
break;
case ICMP6_MEMBERSHIP_REDUCTION:
printf("icmp6: multicast listener done ");
mld6_print((const u_char *)dp);
break;
case ND_ROUTER_SOLICIT:
printf("icmp6: router solicitation ");
if (vflag) {
#define RTSOLLEN 8
icmp6_opt_print((const u_char *)dp + RTSOLLEN,
icmp6len - RTSOLLEN);
}
break;
case ND_ROUTER_ADVERT:
printf("icmp6: router advertisement");
if (vflag) {
struct nd_router_advert *p;
p = (struct nd_router_advert *)dp;
TCHECK(p->nd_ra_retransmit);
printf("(chlim=%d, ", (int)p->nd_ra_curhoplimit);
if (p->nd_ra_flags_reserved & ND_RA_FLAG_MANAGED)
printf("M");
if (p->nd_ra_flags_reserved & ND_RA_FLAG_OTHER)
printf("O");
if (p->nd_ra_flags_reserved & ND_RA_FLAG_HOME_AGENT)
printf("H");
if ((p->nd_ra_flags_reserved & ~ND_RA_FLAG_RTPREF_MASK)
!= 0)
printf(" ");
printf("pref=%s, ",
get_rtpref(p->nd_ra_flags_reserved));
printf("router_ltime=%d, ", ntohs(p->nd_ra_router_lifetime));
printf("reachable_time=%u, ",
(u_int32_t)ntohl(p->nd_ra_reachable));
printf("retrans_time=%u)",
(u_int32_t)ntohl(p->nd_ra_retransmit));
#define RTADVLEN 16
icmp6_opt_print((const u_char *)dp + RTADVLEN,
icmp6len - RTADVLEN);
}
break;
case ND_NEIGHBOR_SOLICIT:
{
struct nd_neighbor_solicit *p;
p = (struct nd_neighbor_solicit *)dp;
TCHECK(p->nd_ns_target);
printf("icmp6: neighbor sol: who has %s",
ip6addr_string(&p->nd_ns_target));
if (vflag) {
#define NDSOLLEN 24
icmp6_opt_print((const u_char *)dp + NDSOLLEN,
icmp6len - NDSOLLEN);
}
}
break;
case ND_NEIGHBOR_ADVERT:
{
struct nd_neighbor_advert *p;
p = (struct nd_neighbor_advert *)dp;
TCHECK(p->nd_na_target);
printf("icmp6: neighbor adv: tgt is %s",
ip6addr_string(&p->nd_na_target));
if (vflag) {
#define ND_NA_FLAG_ALL \
(ND_NA_FLAG_ROUTER|ND_NA_FLAG_SOLICITED|ND_NA_FLAG_OVERRIDE)
/* we don't need ntohl() here. see advanced-api-04. */
if (p->nd_na_flags_reserved & ND_NA_FLAG_ALL) {
#undef ND_NA_FLAG_ALL
u_int32_t flags;
flags = p->nd_na_flags_reserved;
printf("(");
if (flags & ND_NA_FLAG_ROUTER)
printf("R");
if (flags & ND_NA_FLAG_SOLICITED)
printf("S");
if (flags & ND_NA_FLAG_OVERRIDE)
printf("O");
printf(")");
}
#define NDADVLEN 24
icmp6_opt_print((const u_char *)dp + NDADVLEN,
icmp6len - NDADVLEN);
#undef NDADVLEN
}
}
break;
case ND_REDIRECT:
#define RDR(i) ((struct nd_redirect *)(i))
TCHECK(RDR(dp)->nd_rd_dst);
printf("icmp6: redirect %s",
getname6((const u_char *)&RDR(dp)->nd_rd_dst));
printf(" to %s",
getname6((const u_char*)&RDR(dp)->nd_rd_target));
#define REDIRECTLEN 40
if (vflag) {
icmp6_opt_print((const u_char *)dp + REDIRECTLEN,
icmp6len - REDIRECTLEN);
}
break;
#undef REDIRECTLEN
#undef RDR
case ICMP6_ROUTER_RENUMBERING:
icmp6_rrenum_print(icmp6len, bp, ep);
break;
case ICMP6_NI_QUERY:
case ICMP6_NI_REPLY:
icmp6_nodeinfo_print(icmp6len, bp, ep);
break;
case ICMP6_HADISCOV_REQUEST:
printf("icmp6: ha discovery request");
if (vflag) {
TCHECK(dp->icmp6_data16[0]);
printf("(id=%d)", ntohs(dp->icmp6_data16[0]));
}
break;
case ICMP6_HADISCOV_REPLY:
printf("icmp6: ha discovery reply");
if (vflag) {
struct in6_addr *in6;
u_int32_t *res;
u_char *cp;
TCHECK(dp->icmp6_data16[0]);
printf("(id=%d", ntohs(dp->icmp6_data16[0]));
cp = (u_char *)dp + icmp6len;
res = (u_int32_t *)(dp + 1);
in6 = (struct in6_addr *)(res + 2);
for (; (u_char *)in6 < cp; in6++) {
TCHECK(*in6);
printf(", %s", ip6addr_string(in6));
}
printf(")");
}
break;
case ICMP6_MOBILEPREFIX_SOLICIT:
printf("icmp6: mobile router solicitation");
if (vflag) {
TCHECK(dp->icmp6_data16[0]);
printf("(id=%d)", ntohs(dp->icmp6_data16[0]));
}
break;
case ICMP6_MOBILEPREFIX_ADVERT:
printf("icmp6: mobile router advertisement");
if (vflag) {
TCHECK(dp->icmp6_data16[0]);
printf("(id=%d)", ntohs(dp->icmp6_data16[0]));
#define MPADVLEN 6
icmp6_opt_print((const u_char *)dp + MPADVLEN,
icmp6len - MPADVLEN);
}
break;
default:
printf("icmp6: type-#%d", dp->icmp6_type);
break;
}
return;
trunc:
fputs("[|icmp6]", stdout);
}
static struct udphdr *
get_upperlayer(u_char *bp, int *prot)
{
const u_char *ep;
struct ip6_hdr *ip6 = (struct ip6_hdr *)bp;
struct udphdr *uh;
struct ip6_hbh *hbh;
struct ip6_frag *fragh;
struct ah *ah;
int nh, hlen;
/* 'ep' points to the end of available data. */
ep = snapend;
if (TTEST(ip6->ip6_nxt) == 0)
return NULL;
nh = ip6->ip6_nxt;
hlen = sizeof(struct ip6_hdr);
while (bp < snapend) {
bp += hlen;
switch(nh) {
case IPPROTO_UDP:
case IPPROTO_TCP:
uh = (struct udphdr *)bp;
if (TTEST(uh->uh_dport)) {
*prot = nh;
return(uh);
}
else
return(NULL);
/* NOTREACHED */
case IPPROTO_HOPOPTS:
case IPPROTO_DSTOPTS:
case IPPROTO_ROUTING:
hbh = (struct ip6_hbh *)bp;
if (TTEST(hbh->ip6h_len) == 0)
return(NULL);
nh = hbh->ip6h_nxt;
hlen = (hbh->ip6h_len + 1) << 3;
break;
case IPPROTO_FRAGMENT: /* this should be odd, but try anyway */
fragh = (struct ip6_frag *)bp;
if (TTEST(fragh->ip6f_offlg) == 0)
return(NULL);
/* fragments with non-zero offset are meaningless */
if ((fragh->ip6f_offlg & IP6F_OFF_MASK) != 0)
return(NULL);
nh = fragh->ip6f_nxt;
hlen = sizeof(struct ip6_frag);
break;
case IPPROTO_AH:
ah = (struct ah *)bp;
if (TTEST(ah->ah_len) == 0)
return(NULL);
nh = ah->ah_nxt;
hlen = (ah->ah_len + 2) << 2;
break;
default: /* unknown or undecodable header */
*prot = nh; /* meaningless, but set here anyway */
return(NULL);
}
}
return(NULL); /* should be notreached, though */
}
void
icmp6_opt_print(const u_char *bp, int resid)
{
const struct nd_opt_hdr *op;
const struct nd_opt_hdr *opl; /* why there's no struct? */
const struct nd_opt_prefix_info *opp;
const struct icmp6_opts_redirect *opr;
const struct nd_opt_mtu *opm;
const struct nd_opt_advinterval *opa;
const struct nd_opt_homeagent_info *oph;
const struct nd_opt_route_info *opri;
const u_char *cp, *ep;
struct in6_addr in6, *in6p;
size_t l;
#define ECHECK(var) if ((u_char *)&(var) > ep - sizeof(var)) return
cp = bp;
/* 'ep' points to the end of available data. */
ep = snapend;
while (cp < ep) {
op = (struct nd_opt_hdr *)cp;
ECHECK(op->nd_opt_len);
if (resid <= 0)
return;
if (op->nd_opt_len == 0)
goto trunc;
if (cp + (op->nd_opt_len << 3) > ep)
goto trunc;
switch (op->nd_opt_type) {
case ND_OPT_SOURCE_LINKADDR:
opl = (struct nd_opt_hdr *)op;
printf("(src lladdr: ");
l = (op->nd_opt_len << 3) - 2;
print_lladdr(cp + 2, l);
/*(*/
printf(")");
break;
case ND_OPT_TARGET_LINKADDR:
opl = (struct nd_opt_hdr *)op;
printf("(tgt lladdr: ");
l = (op->nd_opt_len << 3) - 2;
print_lladdr(cp + 2, l);
/*(*/
printf(")");
break;
case ND_OPT_PREFIX_INFORMATION:
opp = (struct nd_opt_prefix_info *)op;
TCHECK(opp->nd_opt_pi_prefix);
printf("(prefix info: "); /*)*/
if (op->nd_opt_len != 4) {
printf("badlen");
/*(*/
printf(")");
break;
}
if (opp->nd_opt_pi_flags_reserved & ND_OPT_PI_FLAG_ONLINK)
printf("L");
if (opp->nd_opt_pi_flags_reserved & ND_OPT_PI_FLAG_AUTO)
printf("A");
if (opp->nd_opt_pi_flags_reserved & ND_OPT_PI_FLAG_ROUTER)
printf("R");
if (opp->nd_opt_pi_flags_reserved)
printf(" ");
printf("valid_ltime=%s,",
get_lifetime((u_int32_t)ntohl(opp->nd_opt_pi_valid_time)));
printf("preferred_ltime=%s,",
get_lifetime((u_int32_t)ntohl(opp->nd_opt_pi_preferred_time)));
printf("prefix=%s/%d",
ip6addr_string(&opp->nd_opt_pi_prefix),
opp->nd_opt_pi_prefix_len);
if (opp->nd_opt_pi_len != 4)
printf("!");
/*(*/
printf(")");
break;
case ND_OPT_REDIRECTED_HEADER:
opr = (struct icmp6_opts_redirect *)op;
printf("(redirect)");
/* xxx */
break;
case ND_OPT_MTU:
opm = (struct nd_opt_mtu *)op;
TCHECK(opm->nd_opt_mtu_mtu);
printf("(mtu:"); /*)*/
if (op->nd_opt_len != 1) {
printf("badlen");
/*(*/
printf(")");
break;
}
printf(" mtu=%u", (u_int32_t)ntohl(opm->nd_opt_mtu_mtu));
if (opm->nd_opt_mtu_len != 1)
printf("!");
printf(")");
break;
case ND_OPT_ADVINTERVAL:
opa = (struct nd_opt_advinterval *)op;
TCHECK(opa->nd_opt_adv_interval);
printf("(advint:"); /*)*/
printf(" advint=%u",
(u_int32_t)ntohl(opa->nd_opt_adv_interval));
/*(*/
printf(")");
break;
case ND_OPT_HOMEAGENT_INFO:
oph = (struct nd_opt_homeagent_info *)op;
TCHECK(oph->nd_opt_hai_lifetime);
printf("(ha info:"); /*)*/
printf(" pref=%d", ntohs(oph->nd_opt_hai_preference));
printf(", lifetime=%u", ntohs(oph->nd_opt_hai_lifetime));
printf(")");
break;
case ND_OPT_ROUTE_INFO:
opri = (struct nd_opt_route_info *)op;
TCHECK(opri->nd_opt_rti_lifetime);
memset(&in6, 0, sizeof(in6));
in6p = (struct in6_addr *)(opri + 1);
switch (op->nd_opt_len) {
case 1:
break;
case 2:
TCHECK2(*in6p, 8);
memcpy(&in6, opri + 1, 8);
break;
case 3:
TCHECK(*in6p);
memcpy(&in6, opri + 1, sizeof(in6));
break;
default:
goto trunc;
}
printf("(rtinfo:"); /*)*/
printf(" %s/%u", ip6addr_string(&in6),
opri->nd_opt_rti_prefixlen);
printf(", pref=%s", get_rtpref(opri->nd_opt_rti_flags));
printf(", lifetime=%s",
get_lifetime((u_int32_t)ntohl(opri->nd_opt_rti_lifetime)));
/*(*/
printf(")");
break;
default:
printf("(unknown opt_type=%d, opt_len=%d)",
op->nd_opt_type, op->nd_opt_len);
break;
}
cp += op->nd_opt_len << 3;
resid -= op->nd_opt_len << 3;
}
return;
trunc:
fputs("[ndp opt]", stdout);
return;
#undef ECHECK
}
void
mld6_print(const u_char *bp)
{
struct mld6_hdr *mp = (struct mld6_hdr *)bp;
const u_char *ep;
/* 'ep' points to the end of available data. */
ep = snapend;
if ((u_char *)mp + sizeof(*mp) > ep)
return;
printf("max resp delay: %d ", ntohs(mp->mld6_maxdelay));
printf("addr: %s", ip6addr_string(&mp->mld6_addr));
}
static void
dnsname_print(const u_char *cp, const u_char *ep)
{
int i;
/* DNS name decoding - no decompression */
printf(", \"");
while (cp < ep) {
i = *cp++;
if (i) {
if (i > ep - cp) {
printf("???");
break;
}
while (i-- && cp < ep) {
safeputchar(*cp);
cp++;
}
if (cp + 1 < ep && *cp)
printf(".");
} else {
if (cp == ep) {
/* FQDN */
printf(".");
} else if (cp + 1 == ep && *cp == '\0') {
/* truncated */
} else {
/* invalid */
printf("???");
}
break;
}
}
printf("\"");
}
void
icmp6_nodeinfo_print(int icmp6len, const u_char *bp, const u_char *ep)
{
struct icmp6_nodeinfo *ni6;
struct icmp6_hdr *dp;
const u_char *cp;
int siz, i;
int needcomma;
dp = (struct icmp6_hdr *)bp;
ni6 = (struct icmp6_nodeinfo *)bp;
siz = ep - bp;
switch (ni6->ni_type) {
case ICMP6_NI_QUERY:
if (siz == sizeof(*dp) + 4) {
/* KAME who-are-you */
printf("icmp6: who-are-you request");
break;
}
printf("icmp6: node information query");
TCHECK2(*dp, sizeof(*ni6));
ni6 = (struct icmp6_nodeinfo *)dp;
printf(" ("); /*)*/
switch (ntohs(ni6->ni_qtype)) {
case NI_QTYPE_NOOP:
printf("noop");
break;
case NI_QTYPE_SUPTYPES:
printf("supported qtypes");
i = ntohs(ni6->ni_flags);
if (i)
printf(" [%s]", (i & 0x01) ? "C" : "");
break;
break;
case NI_QTYPE_FQDN:
printf("DNS name");
break;
case NI_QTYPE_NODEADDR:
printf("node addresses");
i = ni6->ni_flags;
if (!i)
break;
/* NI_NODEADDR_FLAG_TRUNCATE undefined for query */
printf(" [%s%s%s%s%s%s]",
(i & NI_NODEADDR_FLAG_ANYCAST) ? "a" : "",
(i & NI_NODEADDR_FLAG_GLOBAL) ? "G" : "",
(i & NI_NODEADDR_FLAG_SITELOCAL) ? "S" : "",
(i & NI_NODEADDR_FLAG_LINKLOCAL) ? "L" : "",
(i & NI_NODEADDR_FLAG_COMPAT) ? "C" : "",
(i & NI_NODEADDR_FLAG_ALL) ? "A" : "");
break;
default:
printf("unknown");
break;
}
if (ni6->ni_qtype == NI_QTYPE_NOOP ||
ni6->ni_qtype == NI_QTYPE_SUPTYPES) {
if (siz != sizeof(*ni6))
if (vflag)
printf(", invalid len");
/*(*/
printf(")");
break;
}
/* XXX backward compat, icmp-name-lookup-03 */
if (siz == sizeof(*ni6)) {
printf(", 03 draft");
/*(*/
printf(")");
break;
}
switch (ni6->ni_code) {
case ICMP6_NI_SUBJ_IPV6:
if (!TTEST2(*dp,
sizeof(*ni6) + sizeof(struct in6_addr)))
break;
if (siz != sizeof(*ni6) + sizeof(struct in6_addr)) {
if (vflag)
printf(", invalid subject len");
break;
}
printf(", subject=%s",
getname6((const u_char *)(ni6 + 1)));
break;
case ICMP6_NI_SUBJ_FQDN:
printf(", subject=DNS name");
cp = (const u_char *)(ni6 + 1);
if (cp[0] == ep - cp - 1) {
/* icmp-name-lookup-03, pascal string */
if (vflag)
printf(", 03 draft");
cp++;
printf(", \"");
while (cp < ep) {
safeputchar(*cp);
cp++;
}
printf("\"");
} else
dnsname_print(cp, ep);
break;
case ICMP6_NI_SUBJ_IPV4:
if (!TTEST2(*dp, sizeof(*ni6) + sizeof(struct in_addr)))
break;
if (siz != sizeof(*ni6) + sizeof(struct in_addr)) {
if (vflag)
printf(", invalid subject len");
break;
}
printf(", subject=%s",
getname((const u_char *)(ni6 + 1)));
break;
default:
printf(", unknown subject");
break;
}
/*(*/
printf(")");
break;
case ICMP6_NI_REPLY:
if (icmp6len > siz) {
printf("[|icmp6: node information reply]");
break;
}
needcomma = 0;
ni6 = (struct icmp6_nodeinfo *)dp;
printf("icmp6: node information reply");
printf(" ("); /*)*/
switch (ni6->ni_code) {
case ICMP6_NI_SUCCESS:
if (vflag) {
printf("success");
needcomma++;
}
break;
case ICMP6_NI_REFUSED:
printf("refused");
needcomma++;
if (siz != sizeof(*ni6))
if (vflag)
printf(", invalid length");
break;
case ICMP6_NI_UNKNOWN:
printf("unknown");
needcomma++;
if (siz != sizeof(*ni6))
if (vflag)
printf(", invalid length");
break;
}
if (ni6->ni_code != ICMP6_NI_SUCCESS) {
/*(*/
printf(")");
break;
}
switch (ntohs(ni6->ni_qtype)) {
case NI_QTYPE_NOOP:
if (needcomma)
printf(", ");
printf("noop");
if (siz != sizeof(*ni6))
if (vflag)
printf(", invalid length");
break;
case NI_QTYPE_SUPTYPES:
if (needcomma)
printf(", ");
printf("supported qtypes");
i = ntohs(ni6->ni_flags);
if (i)
printf(" [%s]", (i & 0x01) ? "C" : "");
break;
case NI_QTYPE_FQDN:
if (needcomma)
printf(", ");
printf("DNS name");
cp = (const u_char *)(ni6 + 1) + 4;
if (cp[0] == ep - cp - 1) {
/* icmp-name-lookup-03, pascal string */
if (vflag)
printf(", 03 draft");
cp++;
printf(", \"");
while (cp < ep) {
safeputchar(*cp);
cp++;
}
printf("\"");
} else
dnsname_print(cp, ep);
if ((ntohs(ni6->ni_flags) & 0x01) != 0)
printf(" [TTL=%u]", *(u_int32_t *)(ni6 + 1));
break;
case NI_QTYPE_NODEADDR:
if (needcomma)
printf(", ");
printf("node addresses");
i = sizeof(*ni6);
while (i < siz) {
if (i + sizeof(struct in6_addr) + sizeof(int32_t) > siz)
break;
printf(" %s", getname6(bp + i));
i += sizeof(struct in6_addr);
printf("(%d)", (int32_t)ntohl(*(int32_t *)(bp + i)));
i += sizeof(int32_t);
}
i = ni6->ni_flags;
if (!i)
break;
printf(" [%s%s%s%s%s%s%s]",
(i & NI_NODEADDR_FLAG_ANYCAST) ? "a" : "",
(i & NI_NODEADDR_FLAG_GLOBAL) ? "G" : "",
(i & NI_NODEADDR_FLAG_SITELOCAL) ? "S" : "",
(i & NI_NODEADDR_FLAG_LINKLOCAL) ? "L" : "",
(i & NI_NODEADDR_FLAG_COMPAT) ? "C" : "",
(i & NI_NODEADDR_FLAG_ALL) ? "A" : "",
(i & NI_NODEADDR_FLAG_TRUNCATE) ? "T" : "");
break;
default:
if (needcomma)
printf(", ");
printf("unknown");
break;
}
/*(*/
printf(")");
break;
}
return;
trunc:
fputs("[|icmp6]", stdout);
}
void
icmp6_rrenum_print(int icmp6len, const u_char *bp, const u_char *ep)
{
struct icmp6_router_renum *rr6;
struct icmp6_hdr *dp;
size_t siz;
const char *cp;
struct rr_pco_match *match;
struct rr_pco_use *use;
char hbuf[NI_MAXHOST];
int n;
dp = (struct icmp6_hdr *)bp;
rr6 = (struct icmp6_router_renum *)bp;
siz = ep - bp;
cp = (const char *)(rr6 + 1);
TCHECK(rr6->rr_reserved);
switch (rr6->rr_code) {
case ICMP6_ROUTER_RENUMBERING_COMMAND:
printf("router renum: command");
break;
case ICMP6_ROUTER_RENUMBERING_RESULT:
printf("router renum: result");
break;
case ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET:
printf("router renum: sequence number reset");
break;
default:
printf("router renum: code-#%d", rr6->rr_code);
break;
}
printf(", seq=%u", (u_int32_t)ntohl(rr6->rr_seqnum));
if (vflag) {
#define F(x, y) ((rr6->rr_flags) & (x) ? (y) : "")
printf("["); /*]*/
if (rr6->rr_flags) {
printf("%s%s%s%s%s,", F(ICMP6_RR_FLAGS_TEST, "T"),
F(ICMP6_RR_FLAGS_REQRESULT, "R"),
F(ICMP6_RR_FLAGS_FORCEAPPLY, "A"),
F(ICMP6_RR_FLAGS_SPECSITE, "S"),
F(ICMP6_RR_FLAGS_PREVDONE, "P"));
}
printf("seg=%u,", rr6->rr_segnum);
printf("maxdelay=%u", rr6->rr_maxdelay);
if (rr6->rr_reserved)
printf("rsvd=0x%x", (u_int16_t)ntohs(rr6->rr_reserved));
/*[*/
printf("]");
#undef F
}
if (rr6->rr_code == ICMP6_ROUTER_RENUMBERING_COMMAND) {
match = (struct rr_pco_match *)cp;
cp = (const char *)(match + 1);
TCHECK(match->rpm_prefix);
if (vflag > 1)
printf("\n\t");
else
printf(" ");
printf("match("); /*)*/
switch (match->rpm_code) {
case RPM_PCO_ADD: printf("add"); break;
case RPM_PCO_CHANGE: printf("change"); break;
case RPM_PCO_SETGLOBAL: printf("setglobal"); break;
default: printf("#%u", match->rpm_code); break;
}
if (vflag) {
printf(",ord=%u", match->rpm_ordinal);
printf(",min=%u", match->rpm_minlen);
printf(",max=%u", match->rpm_maxlen);
}
if (inet_ntop(AF_INET6, &match->rpm_prefix, hbuf, sizeof(hbuf)))
printf(",%s/%u", hbuf, match->rpm_matchlen);
else
printf(",?/%u", match->rpm_matchlen);
/*(*/
printf(")");
n = match->rpm_len - 3;
if (n % 4)
goto trunc;
n /= 4;
while (n-- > 0) {
use = (struct rr_pco_use *)cp;
cp = (const char *)(use + 1);
TCHECK(use->rpu_prefix);
if (vflag > 1)
printf("\n\t");
else
printf(" ");
printf("use("); /*)*/
if (use->rpu_flags) {
#define F(x, y) ((use->rpu_flags) & (x) ? (y) : "")
printf("%s%s,",
F(ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME, "V"),
F(ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME, "P"));
#undef F
}
if (vflag) {
printf("mask=0x%x,", use->rpu_ramask);
printf("raflags=0x%x,", use->rpu_raflags);
if (~use->rpu_vltime == 0)
printf("vltime=infty,");
else
printf("vltime=%u,",
(u_int32_t)ntohl(use->rpu_vltime));
if (~use->rpu_pltime == 0)
printf("pltime=infty,");
else
printf("pltime=%u,",
(u_int32_t)ntohl(use->rpu_pltime));
}
if (inet_ntop(AF_INET6, &use->rpu_prefix, hbuf,
sizeof(hbuf)))
printf("%s/%u/%u", hbuf, use->rpu_uselen,
use->rpu_keeplen);
else
printf("?/%u/%u", use->rpu_uselen,
use->rpu_keeplen);
/*(*/
printf(")");
}
}
return;
trunc:
fputs("[|icmp6]", stdout);
}
#endif /* INET6 */
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