#ifndef lint
static const char rcsid[] =
- "@(#) $Header: /tcpdump/master/tcpdump/print-icmp6.c,v 1.7 2000-04-28 11:46:12 itojun Exp $";
+ "@(#) $Header: /tcpdump/master/tcpdump/print-icmp6.c,v 1.8 2000-05-10 08:20:52 itojun Exp $";
#endif
#ifdef HAVE_CONFIG_H
void icmp6_opt_print(const u_char *, int);
void mld6_print(const u_char *);
+#ifdef HAVE_STRUCT_ICMP6_NODEINFO
+void icmp6_nodeinfo_print(int, const u_char *, const u_char *);
+#endif
+
+#ifndef abs
+#define abs(a) ((0 < (a)) ? (a) : -(a))
+#endif
+
+#ifndef HAVE_STRUCT_ICMP6_NODEINFO
+struct icmp6_nodeinfo {
+ struct icmp6_hdr icmp6_ni_hdr;
+ u_int8_t icmp6_ni_nonce[8];
+ /* could be followed by reply data */
+};
+
+#define ni_type icmp6_ni_hdr.icmp6_type
+#define ni_code icmp6_ni_hdr.icmp6_code
+#define ni_cksum icmp6_ni_hdr.icmp6_cksum
+#define ni_qtype icmp6_ni_hdr.icmp6_data16[0]
+#define ni_flags icmp6_ni_hdr.icmp6_data16[1]
+#endif
+
+#ifndef ICMP6_NI_SUCCESS
+#define ICMP6_NI_SUCESS 0 /* node information successful reply */
+#define ICMP6_NI_REFUSED 1 /* node information request is refused */
+#define ICMP6_NI_UNKNOWN 2 /* unknown Qtype */
+#endif
+
+#ifdef NI_QTYPE_NOOP
+#define NI_QTYPE_NOOP 0 /* NOOP */
+#define NI_QTYPE_SUPTYPES 1 /* Supported Qtypes */
+#define NI_QTYPE_FQDN 2 /* FQDN */
+#define NI_QTYPE_NODEADDR 3 /* Node Addresses. XXX: spec says 2, but it may be a typo... */
+#endif
+
+#ifndef ICMP6_NI_SUBJ_IPV6
+#define ICMP6_NI_SUBJ_IPV6 0 /* Query Subject is an IPv6 address */
+#define ICMP6_NI_SUBJ_FQDN 1 /* Query Subject is a Domain name */
+#define ICMP6_NI_SUBJ_IPV4 2 /* Query Subject is an IPv4 address */
+#endif
void
icmp6_print(register const u_char *bp, register const u_char *bp2)
{
- register const struct icmp6_hdr *dp;
+ const struct icmp6_hdr *dp;
register const struct ip6_hdr *ip;
register const char *str;
register const struct ip6_hdr *oip;
register const u_char *ep;
char buf[256];
int icmp6len;
+ struct icmp6_nodeinfo *ni6;
#if 0
#define TCHECK(var) if ((u_char *)&(var) > ep - sizeof(var)) goto trunc
#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))
- char tgtbuf[INET6_ADDRSTRLEN], dstbuf[INET6_ADDRSTRLEN];
-
TCHECK(RDR(dp)->nd_rd_dst);
- inet_ntop(AF_INET6, &RDR(dp)->nd_rd_target,
- tgtbuf, INET6_ADDRSTRLEN);
- inet_ntop(AF_INET6, &RDR(dp)->nd_rd_dst,
- dstbuf, INET6_ADDRSTRLEN);
- printf("icmp6: redirect %s to %s", dstbuf, tgtbuf);
+ 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
#ifndef ICMP6_ROUTER_RENUMBERING
#define ICMP6_ROUTER_RENUMBERING 138 /* router renumbering */
#endif
break;
}
break;
-#ifdef ICMP6_WRUREQUEST
- case ICMP6_WRUREQUEST: /*ICMP6_FQDN_QUERY*/
- {
- int siz;
- siz = ep - (u_char *)(dp + 1);
- if (icmp6len > ep - (u_char *)dp) {
- printf("[|icmp6: who-are-you/FQDN request]");
- break;
- }
- if (siz == 4)
- printf("icmp6: who-are-you request");
- else {
- printf("icmp6: FQDN request");
- if (vflag && icmp6len == ep - (u_char *)dp) {
- if (siz < 8)
- printf("?(icmp6_data %d bytes)", siz);
- else if (8 < siz)
- printf("?(extra %d bytes)", siz - 8);
- }
- }
+#ifdef HAVE_STRUCT_ICMP6_NODEINFO
+#ifndef ICMP6_NI_QUERY
+#define ICMP6_NI_QUERY 139
+#endif
+ case ICMP6_NI_QUERY:
+ icmp6_nodeinfo_print(icmp6len, bp, ep);
break;
- }
-#endif /*ICMP6_WRUREQUEST*/
-#ifdef ICMP6_WRUREPLY
- case ICMP6_WRUREPLY: /*ICMP6_FQDN_REPLY*/
- {
- enum { UNKNOWN, WRU, FQDN } mode = UNKNOWN;
- const u_char *buf;
- const u_char *cp = NULL;
- const char *modename = NULL;
-
- buf = (u_char *)(dp + 1);
-
- /* fair guess */
- if (ep - buf > 12 && buf[12] == ep - buf - 13)
- mode = FQDN;
- else if (dp->icmp6_code == 1)
- mode = FQDN;
-
- /* wild guess */
- if (mode == UNKNOWN && ep - buf > 4) {
- cp = buf + 4;
- while (cp < ep) {
- if (!isprint(*cp++))
- mode = FQDN;
- }
- }
-#ifndef abs
-#define abs(a) ((0 < (a)) ? (a) : -(a))
+#ifndef ICMP6_NI_REPLY
+#define ICMP6_NI_REPLY 140
#endif
- if (mode == UNKNOWN && ep - buf > 12 &&
- 2 < abs(buf[12] - (ep - buf - 13))) {
- mode = WRU;
- }
- if (mode == UNKNOWN)
- mode = FQDN;
-
- if (mode == WRU) {
- if (ep - buf > 12 && buf[12] == ep - buf - 13)
- cp = buf + 4;
- else
- cp = ep + 1; /*truncated*/
- modename = "icmp6: who-are-you reply";
- } else if (mode == FQDN) {
- cp = buf + 13;
- modename = "icmp6: FQDN reply";
- }
- if (icmp6len > ep - (u_char *)dp) {
- printf("[|%s]", modename);
- break;
- }
- printf("%s", modename);
- printf("(\""); /*)*/
- for (; cp < ep; cp++)
- printf((isprint(*cp) ? "%c" : "\\%03o"), *cp);
- printf("\"");
- if (vflag) {
- printf(",%s", mode == FQDN ? "FQDN" : "WRU");
- if (mode == FQDN) {
- long ttl;
- ttl = (long)ntohl(*(u_long *)&buf[8]);
- if (dp->icmp6_code == 1)
- printf(",TTL=unknown");
- else if (ttl < 0)
- printf(",TTL=%ld:invalid", ttl);
- else
- printf(",TTL=%ld", ttl);
- if (buf[12] != ep - buf - 13) {
- (void)printf(",invalid namelen:%d/%u",
- buf[12],
- (unsigned int)(ep - buf - 13));
- }
- }
- }
- /*(*/
- printf(")");
+ case ICMP6_NI_REPLY:
+ icmp6_nodeinfo_print(icmp6len, bp, ep);
break;
- }
-#endif /*ICMP6_WRUREPLY*/
+#endif
default:
printf("icmp6: type-#%d", dp->icmp6_type);
break;
char buf[256];
#endif
-#if 0
-#define TCHECK(var) if ((u_char *)&(var) > ep - sizeof(var)) goto trunc
-#endif
#define ECHECK(var) if ((u_char *)&(var) > ep - sizeof(var)) return
op = (struct nd_opt_hdr *)bp;
trunc:
fputs("[ndp opt]", stdout);
return;
-#if 0
-#undef TCHECK
-#endif
#undef ECHECK
}
#endif
+#ifdef HAVE_STRUCT_ICMP6_NODEINFO
+void
+icmp6_nodeinfo_print(int icmp6len, const u_char *bp, const u_char *ep)
+{
+#define safeputc(c) printf((isprint((c)) ? "%c" : "\\%03o"), c)
+ struct icmp6_nodeinfo *ni6;
+ struct icmp6_hdr *dp;
+ const u_char *cp;
+ int siz, i;
+
+ 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) + 4;
+ if (cp[0] == ep - cp - 1) {
+ /* icmp-name-lookup-03, pascal string */
+ if (vflag)
+ printf(", 03 draft");
+ cp++;
+ printf(", \"");
+ while (cp < ep) {
+ safeputc(*cp);
+ cp++;
+ }
+ printf("\"");
+ } else {
+ /* DNS name decoding - no decompression */
+ printf(", \"");
+ while (cp < ep) {
+ i = *cp++;
+ while (i-- && cp < ep) {
+ safeputc(*cp);
+ cp++;
+ }
+ printf(".");
+ }
+ printf("\"");
+ }
+ 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;
+ }
+
+ ni6 = (struct icmp6_nodeinfo *)dp;
+ printf("icmp6: node information query");
+ printf(" ("); /*)*/
+ switch (ni6->ni_code) {
+ case ICMP6_NI_SUCESS:
+ break;
+ case ICMP6_NI_REFUSED:
+ printf("refused");
+ if (siz != sizeof(*ni6))
+ if (vflag)
+ printf(", invalid length");
+ break;
+ case ICMP6_NI_UNKNOWN:
+ printf("unknown");
+ if (siz != sizeof(*ni6))
+ if (vflag)
+ printf(", invalid length");
+ break;
+ }
+
+ if (ni6->ni_code != ICMP6_NI_SUCESS) {
+ /*(*/
+ printf(")");
+ break;
+ }
+
+ switch (ntohs(ni6->ni_qtype)) {
+ case NI_QTYPE_NOOP:
+ printf("noop");
+ if (siz != sizeof(*ni6))
+ if (vflag)
+ printf(", invalid length");
+ break;
+ case NI_QTYPE_SUPTYPES:
+ printf("supported qtypes");
+ i = ntohs(ni6->ni_flags);
+ if (i)
+ printf(" [%s]", (i & 0x01) ? "C" : "");
+ break;
+ case NI_QTYPE_FQDN:
+ if (vflag)
+ 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) {
+ safeputc(*cp);
+ cp++;
+ }
+ printf("\"");
+ } else {
+ /* DNS name decoding - no decompression */
+ printf(", \"");
+ while (cp < ep) {
+ i = *cp++;
+ while (i-- && cp < ep) {
+ safeputc(*cp);
+ cp++;
+ }
+ printf(".");
+ }
+ printf("\"");
+ }
+ if ((ntohs(ni6->ni_flags) & 0x01) != 0)
+ printf(" [TTL=%u]", *(u_int32_t *)(ni6 + 1));
+ break;
+ case NI_QTYPE_NODEADDR:
+ printf("node addresses");
+ for (i = sizeof(*ni6);
+ i < siz;
+ i += sizeof(struct in6_addr)) {
+ printf(" %s", getname6(bp + i));
+ }
+ 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:
+ printf("unknown");
+ break;
+ }
+
+ /*(*/
+ printf(")");
+ break;
+ }
+ return;
+
+trunc:
+ fputs("[|icmp6]", stdout);
+#undef safeputc
+}
+#endif
+
#endif /* INET6 */
projects / tcpdump / commitdiff
