* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
-#ifndef lint
-static const char rcsid[] =
- "@(#) $Header: /tcpdump/master/tcpdump/print-domain.c,v 1.42 1999-11-21 09:36:50 fenner Exp $ (LBL)";
-#endif
-
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
-#include <sys/param.h>
-#include <sys/time.h>
-#include <sys/socket.h>
+#include <tcpdump-stdinc.h>
-#if __STDC__
-struct mbuf;
-struct rtentry;
-#endif
-#include <net/if.h>
-
-#include <netinet/in.h>
-#include <netinet/if_ether.h>
-#include <netinet/in_systm.h>
-#include <netinet/ip.h>
-#include <netinet/ip_var.h>
-#include <netinet/udp.h>
-#include <netinet/udp_var.h>
-#include <netinet/tcp.h>
-
-#ifdef NOERROR
-#undef NOERROR /* Solaris sucks */
-#endif
-#ifdef NOERROR
-#undef T_UNSPEC /* SINIX does too */
-#endif
-#include <arpa/nameser.h>
+#include "nameser.h"
#include <stdio.h>
#include <string.h>
#include "addrtoname.h"
#include "extract.h" /* must come after interface.h */
-/* Compatibility */
-#ifndef T_TXT
-#define T_TXT 16 /* text strings */
-#endif
-#ifndef T_RP
-#define T_RP 17 /* responsible person */
-#endif
-#ifndef T_AFSDB
-#define T_AFSDB 18 /* AFS cell database */
-#endif
-#ifndef T_X25
-#define T_X25 19 /* X_25 calling address */
-#endif
-#ifndef T_ISDN
-#define T_ISDN 20 /* ISDN calling address */
-#endif
-#ifndef T_RT
-#define T_RT 21 /* router */
-#endif
-#ifndef T_NSAP
-#define T_NSAP 22 /* NSAP address */
-#endif
-#ifndef T_NSAP_PTR
-#define T_NSAP_PTR 23 /* reverse NSAP lookup (deprecated) */
-#endif
-#ifndef T_SIG
-#define T_SIG 24 /* security signature */
-#endif
-#ifndef T_KEY
-#define T_KEY 25 /* security key */
-#endif
-#ifndef T_PX
-#define T_PX 26 /* X.400 mail mapping */
-#endif
-#ifndef T_GPOS
-#define T_GPOS 27 /* geographical position (withdrawn) */
-#endif
-#ifndef T_AAAA
-#define T_AAAA 28 /* IP6 Address */
-#endif
-#ifndef T_LOC
-#define T_LOC 29 /* Location Information */
-#endif
-#ifndef T_NXT
-#define T_NXT 30 /* Next Valid Name in Zone */
-#endif
-#ifndef T_EID
-#define T_EID 31 /* Endpoint identifier */
-#endif
-#ifndef T_NIMLOC
-#define T_NIMLOC 32 /* Nimrod locator */
-#endif
-#ifndef T_SRV
-#define T_SRV 33 /* Server selection */
-#endif
-#ifndef T_ATMA
-#define T_ATMA 34 /* ATM Address */
-#endif
-#ifndef T_NAPTR
-#define T_NAPTR 35 /* Naming Authority PoinTeR */
-#endif
-#ifndef T_A6
-#define T_A6 38 /* IP6 address (ipngwg-dns-lookups) */
-#endif
-
-#ifndef T_UNSPEC
-#define T_UNSPEC 103 /* Unspecified format (binary data) */
-#endif
-#ifndef T_UNSPECA
-#define T_UNSPECA 104 /* "unspecified ascii". Ugly MIT hack */
-#endif
-
-#ifndef C_CHAOS
-#define C_CHAOS 3 /* for chaos net (MIT) */
-#endif
-#ifndef C_HS
-#define C_HS 4 /* for Hesiod name server (MIT) (XXX) */
-#endif
-
-static char *ns_ops[] = {
- "", " inv_q", " stat", " op3", " notify", " op5", " op6", " op7",
+static const char *ns_ops[] = {
+ "", " inv_q", " stat", " op3", " notify", " update", " op6", " op7",
" op8", " updataA", " updateD", " updateDA",
" updateM", " updateMA", " zoneInit", " zoneRef",
};
-static char *ns_resp[] = {
+static const char *ns_resp[] = {
"", " FormErr", " ServFail", " NXDomain",
- " NotImp", " Refused", " Resp6", " Resp7",
- " Resp8", " Resp9", " Resp10", " Resp11",
+ " NotImp", " Refused", " YXDomain", " YXRRSet",
+ " NXRRSet", " NotAuth", " NotZone", " Resp11",
" Resp12", " Resp13", " Resp14", " NoChange",
};
/* skip over a domain name */
static const u_char *
-ns_nskip(register const u_char *cp, register const u_char *bp)
+ns_nskip(register const u_char *cp)
{
register u_char i;
- if (((i = *cp++) & INDIR_MASK) == INDIR_MASK)
- return (cp + 1);
- while (i && cp < snapend) {
- cp += i;
+ if (!TTEST2(*cp, 1))
+ return (NULL);
+ i = *cp++;
+ while (i) {
+ if ((i & INDIR_MASK) == INDIR_MASK)
+ return (cp + 1);
+ if ((i & INDIR_MASK) == EDNS0_MASK) {
+ int bitlen, bytelen;
+
+ if ((i & ~INDIR_MASK) != EDNS0_ELT_BITLABEL)
+ return(NULL); /* unknown ELT */
+ if (!TTEST2(*cp, 1))
+ return (NULL);
+ if ((bitlen = *cp++) == 0)
+ bitlen = 256;
+ bytelen = (bitlen + 7) / 8;
+ cp += bytelen;
+ } else
+ cp += i;
+ if (!TTEST2(*cp, 1))
+ return (NULL);
i = *cp++;
}
return (cp);
/* print a <domain-name> */
static const u_char *
-ns_nprint(register const u_char *cp, register const u_char *bp)
+blabel_print(const u_char *cp)
+{
+ int bitlen, slen, b;
+ const u_char *bitp, *lim;
+ char tc;
+
+ if (!TTEST2(*cp, 1))
+ return(NULL);
+ if ((bitlen = *cp) == 0)
+ bitlen = 256;
+ slen = (bitlen + 3) / 4;
+ lim = cp + 1 + slen;
+
+ /* print the bit string as a hex string */
+ printf("\\[x");
+ for (bitp = cp + 1, b = bitlen; bitp < lim && b > 7; b -= 8, bitp++) {
+ TCHECK(*bitp);
+ printf("%02x", *bitp);
+ }
+ if (b > 4) {
+ TCHECK(*bitp);
+ tc = *bitp++;
+ printf("%02x", tc & (0xff << (8 - b)));
+ } else if (b > 0) {
+ TCHECK(*bitp);
+ tc = *bitp++;
+ printf("%1x", ((tc >> 4) & 0x0f) & (0x0f << (4 - b)));
+ }
+ printf("/%d]", bitlen);
+ return lim;
+trunc:
+ printf(".../%d]", bitlen);
+ return NULL;
+}
+
+static int
+labellen(const u_char *cp)
{
register u_int i;
- register const u_char *rp;
- register int compress;
- i = *cp++;
- rp = cp + i;
- if ((i & INDIR_MASK) == INDIR_MASK) {
- rp = cp + 1;
- compress = 1;
+ if (!TTEST2(*cp, 1))
+ return(-1);
+ i = *cp;
+ if ((i & INDIR_MASK) == EDNS0_MASK) {
+ int bitlen, elt;
+ if ((elt = (i & ~INDIR_MASK)) != EDNS0_ELT_BITLABEL) {
+ printf("<ELT %d>", elt);
+ return(-1);
+ }
+ if (!TTEST2(*(cp + 1), 1))
+ return(-1);
+ if ((bitlen = *(cp + 1)) == 0)
+ bitlen = 256;
+ return(((bitlen + 7) / 8) + 1);
} else
+ return(i);
+}
+
+const u_char *
+ns_nprint(register const u_char *cp, register const u_char *bp)
+{
+ register u_int i, l;
+ register const u_char *rp = NULL;
+ register int compress = 0;
+ int chars_processed;
+ int elt;
+ int data_size = snapend - bp;
+
+ if ((l = labellen(cp)) == (u_int)-1)
+ return(NULL);
+ if (!TTEST2(*cp, 1))
+ return(NULL);
+ chars_processed = 1;
+ if (((i = *cp++) & INDIR_MASK) != INDIR_MASK) {
compress = 0;
+ rp = cp + l;
+ }
+
if (i != 0)
while (i && cp < snapend) {
if ((i & INDIR_MASK) == INDIR_MASK) {
+ if (!compress) {
+ rp = cp + 1;
+ compress = 1;
+ }
+ if (!TTEST2(*cp, 1))
+ return(NULL);
cp = bp + (((i << 8) | *cp) & 0x3fff);
+ if ((l = labellen(cp)) == (u_int)-1)
+ return(NULL);
+ if (!TTEST2(*cp, 1))
+ return(NULL);
i = *cp++;
+ chars_processed++;
+
+ /*
+ * If we've looked at every character in
+ * the message, this pointer will make
+ * us look at some character again,
+ * which means we're looping.
+ */
+ if (chars_processed >= data_size) {
+ printf("<LOOP>");
+ return (NULL);
+ }
continue;
}
- if (fn_printn(cp, i, snapend))
- break;
- cp += i;
+ if ((i & INDIR_MASK) == EDNS0_MASK) {
+ elt = (i & ~INDIR_MASK);
+ switch(elt) {
+ case EDNS0_ELT_BITLABEL:
+ if (blabel_print(cp) == NULL)
+ return (NULL);
+ break;
+ default:
+ /* unknown ELT */
+ printf("<ELT %d>", elt);
+ return(NULL);
+ }
+ } else {
+ if (fn_printn(cp, l, snapend))
+ return(NULL);
+ }
+
+ cp += l;
+ chars_processed += l;
putchar('.');
+ if ((l = labellen(cp)) == (u_int)-1)
+ return(NULL);
+ if (!TTEST2(*cp, 1))
+ return(NULL);
i = *cp++;
+ chars_processed++;
if (!compress)
- rp += i + 1;
+ rp += l + 1;
}
else
putchar('.');
/* print a <character-string> */
static const u_char *
-ns_cprint(register const u_char *cp, register const u_char *bp)
+ns_cprint(register const u_char *cp)
{
register u_int i;
+ if (!TTEST2(*cp, 1))
+ return (NULL);
i = *cp++;
- (void)fn_printn(cp, i, snapend);
+ if (fn_printn(cp, i, snapend))
+ return (NULL);
return (cp + i);
}
-static struct tok type2str[] = {
- { T_A, "A" },
- { T_NS, "NS" },
- { T_MD, "MD" },
- { T_MF, "MF" },
- { T_CNAME, "CNAME" },
- { T_SOA, "SOA" },
- { T_MB, "MB" },
- { T_MG, "MG" },
- { T_MR, "MR" },
- { T_NULL, "NULL" },
- { T_WKS, "WKS" },
- { T_PTR, "PTR" },
- { T_HINFO, "HINFO" },
- { T_MINFO, "MINFO" },
- { T_MX, "MX" },
- { T_TXT, "TXT" },
- { T_RP, "RP" },
- { T_AFSDB, "AFSDB" },
- { T_X25, "X25" },
- { T_ISDN, "ISDN" },
- { T_RT, "RT" },
- { T_NSAP, "NSAP" },
+/* http://www.iana.org/assignments/dns-parameters */
+const struct tok ns_type2str[] = {
+ { T_A, "A" }, /* RFC 1035 */
+ { T_NS, "NS" }, /* RFC 1035 */
+ { T_MD, "MD" }, /* RFC 1035 */
+ { T_MF, "MF" }, /* RFC 1035 */
+ { T_CNAME, "CNAME" }, /* RFC 1035 */
+ { T_SOA, "SOA" }, /* RFC 1035 */
+ { T_MB, "MB" }, /* RFC 1035 */
+ { T_MG, "MG" }, /* RFC 1035 */
+ { T_MR, "MR" }, /* RFC 1035 */
+ { T_NULL, "NULL" }, /* RFC 1035 */
+ { T_WKS, "WKS" }, /* RFC 1035 */
+ { T_PTR, "PTR" }, /* RFC 1035 */
+ { T_HINFO, "HINFO" }, /* RFC 1035 */
+ { T_MINFO, "MINFO" }, /* RFC 1035 */
+ { T_MX, "MX" }, /* RFC 1035 */
+ { T_TXT, "TXT" }, /* RFC 1035 */
+ { T_RP, "RP" }, /* RFC 1183 */
+ { T_AFSDB, "AFSDB" }, /* RFC 1183 */
+ { T_X25, "X25" }, /* RFC 1183 */
+ { T_ISDN, "ISDN" }, /* RFC 1183 */
+ { T_RT, "RT" }, /* RFC 1183 */
+ { T_NSAP, "NSAP" }, /* RFC 1706 */
{ T_NSAP_PTR, "NSAP_PTR" },
- { T_SIG, "SIG" },
- { T_KEY, "KEY" },
- { T_PX, "PX" },
- { T_GPOS, "GPOS" },
- { T_AAAA, "AAAA" },
- { T_LOC, "LOC " },
- { T_NXT, "NXT " },
- { T_EID, "EID " },
- { T_NIMLOC, "NIMLOC " },
- { T_SRV, "SRV " },
- { T_ATMA, "ATMA " },
- { T_NAPTR, "NAPTR " },
- { T_A6, "A6 " },
-#ifndef T_UINFO
-#define T_UINFO 100
-#endif
+ { T_SIG, "SIG" }, /* RFC 2535 */
+ { T_KEY, "KEY" }, /* RFC 2535 */
+ { T_PX, "PX" }, /* RFC 2163 */
+ { T_GPOS, "GPOS" }, /* RFC 1712 */
+ { T_AAAA, "AAAA" }, /* RFC 1886 */
+ { T_LOC, "LOC" }, /* RFC 1876 */
+ { T_NXT, "NXT" }, /* RFC 2535 */
+ { T_EID, "EID" }, /* Nimrod */
+ { T_NIMLOC, "NIMLOC" }, /* Nimrod */
+ { T_SRV, "SRV" }, /* RFC 2782 */
+ { T_ATMA, "ATMA" }, /* ATM Forum */
+ { T_NAPTR, "NAPTR" }, /* RFC 2168, RFC 2915 */
+ { T_KX, "KX" }, /* RFC 2230 */
+ { T_CERT, "CERT" }, /* RFC 2538 */
+ { T_A6, "A6" }, /* RFC 2874 */
+ { T_DNAME, "DNAME" }, /* RFC 2672 */
+ { T_SINK, "SINK" },
+ { T_OPT, "OPT" }, /* RFC 2671 */
+ { T_APL, "APL" }, /* RFC 3123 */
+ { T_DS, "DS" }, /* RFC 4034 */
+ { T_SSHFP, "SSHFP" }, /* RFC 4255 */
+ { T_IPSECKEY, "IPSECKEY" }, /* RFC 4025 */
+ { T_RRSIG, "RRSIG" }, /* RFC 4034 */
+ { T_NSEC, "NSEC" }, /* RFC 4034 */
+ { T_DNSKEY, "DNSKEY" }, /* RFC 4034 */
+ { T_SPF, "SPF" }, /* RFC-schlitt-spf-classic-02.txt */
{ T_UINFO, "UINFO" },
-#ifndef T_UID
-#define T_UID 101
-#endif
{ T_UID, "UID" },
-#ifndef T_GID
-#define T_GID 102
-#endif
{ T_GID, "GID" },
{ T_UNSPEC, "UNSPEC" },
{ T_UNSPECA, "UNSPECA" },
- { T_AXFR, "AXFR" },
- { T_MAILB, "MAILB" },
- { T_MAILA, "MAILA" },
+ { T_TKEY, "TKEY" }, /* RFC 2930 */
+ { T_TSIG, "TSIG" }, /* RFC 2845 */
+ { T_IXFR, "IXFR" }, /* RFC 1995 */
+ { T_AXFR, "AXFR" }, /* RFC 1035 */
+ { T_MAILB, "MAILB" }, /* RFC 1035 */
+ { T_MAILA, "MAILA" }, /* RFC 1035 */
{ T_ANY, "ANY" },
{ 0, NULL }
};
-static struct tok class2str[] = {
+const struct tok ns_class2str[] = {
{ C_IN, "IN" }, /* Not used */
- { C_CHAOS, "CHAOS)" },
+ { C_CHAOS, "CHAOS" },
{ C_HS, "HS" },
{ C_ANY, "ANY" },
{ 0, NULL }
};
/* print a query */
-static void
-ns_qprint(register const u_char *cp, register const u_char *bp)
+static const u_char *
+ns_qprint(register const u_char *cp, register const u_char *bp, int is_mdns)
{
register const u_char *np = cp;
- register u_int i;
-
- cp = ns_nskip(cp, bp);
-
- if (cp + 4 > snapend)
- return;
-
- /* print the qtype and qclass (if it's not IN) */
- i = *cp++ << 8;
- i |= *cp++;
- printf(" %s", tok2str(type2str, "Type%d", i));
- i = *cp++ << 8;
- i |= *cp++;
- if (i != C_IN)
- printf(" %s", tok2str(class2str, "(Class %d)", i));
+ register u_int i, class;
+
+ cp = ns_nskip(cp);
+
+ if (cp == NULL || !TTEST2(*cp, 4))
+ return(NULL);
+
+ /* print the qtype */
+ i = EXTRACT_16BITS(cp);
+ cp += 2;
+ printf(" %s", tok2str(ns_type2str, "Type%d", i));
+ /* print the qclass (if it's not IN) */
+ i = EXTRACT_16BITS(cp);
+ cp += 2;
+ if (is_mdns)
+ class = (i & ~C_QU);
+ else
+ class = i;
+ if (class != C_IN)
+ printf(" %s", tok2str(ns_class2str, "(Class %d)", class));
+ if (is_mdns) {
+ if (i & C_QU)
+ printf(" (QU)");
+ else
+ printf(" (QM)");
+ }
fputs("? ", stdout);
- ns_nprint(np, bp);
+ cp = ns_nprint(np, bp);
+ return(cp ? cp + 4 : NULL);
}
/* print a reply */
static const u_char *
-ns_rprint(register const u_char *cp, register const u_char *bp)
+ns_rprint(register const u_char *cp, register const u_char *bp, int is_mdns)
{
- register u_int i;
+ register u_int i, class, opt_flags = 0;
register u_short typ, len;
register const u_char *rp;
if (vflag) {
putchar(' ');
- cp = ns_nprint(cp, bp);
+ if ((cp = ns_nprint(cp, bp)) == NULL)
+ return NULL;
} else
- cp = ns_nskip(cp, bp);
+ cp = ns_nskip(cp);
- if (cp + 10 > snapend)
+ if (cp == NULL || !TTEST2(*cp, 10))
return (snapend);
- /* print the type/qtype and class (if it's not IN) */
- typ = *cp++ << 8;
- typ |= *cp++;
- i = *cp++ << 8;
- i |= *cp++;
- if (i != C_IN)
- printf(" %s", tok2str(class2str, "(Class %d)", i));
+ /* print the type/qtype */
+ typ = EXTRACT_16BITS(cp);
+ cp += 2;
+ /* print the class (if it's not IN and the type isn't OPT) */
+ i = EXTRACT_16BITS(cp);
+ cp += 2;
+ if (is_mdns)
+ class = (i & ~C_CACHE_FLUSH);
+ else
+ class = i;
+ if (class != C_IN && typ != T_OPT)
+ printf(" %s", tok2str(ns_class2str, "(Class %d)", class));
+ if (is_mdns) {
+ if (i & C_CACHE_FLUSH)
+ printf(" (Cache flush)");
+ }
- /* ignore ttl */
- cp += 4;
+ if (typ == T_OPT) {
+ /* get opt flags */
+ cp += 2;
+ opt_flags = EXTRACT_16BITS(cp);
+ /* ignore rest of ttl field */
+ cp += 2;
+ } else if (vflag > 2) {
+ /* print ttl */
+ printf(" [");
+ relts_print(EXTRACT_32BITS(cp));
+ printf("]");
+ cp += 4;
+ } else {
+ /* ignore ttl */
+ cp += 4;
+ }
- len = *cp++ << 8;
- len |= *cp++;
+ len = EXTRACT_16BITS(cp);
+ cp += 2;
rp = cp + len;
- printf(" %s", tok2str(type2str, "Type%d", typ));
- switch (typ) {
+ printf(" %s", tok2str(ns_type2str, "Type%d", typ));
+ if (rp > snapend)
+ return(NULL);
+ switch (typ) {
case T_A:
- printf(" %s", ipaddr_string(cp));
+ if (!TTEST2(*cp, sizeof(struct in_addr)))
+ return(NULL);
+ printf(" %s", intoa(htonl(EXTRACT_32BITS(cp))));
break;
case T_NS:
case T_CNAME:
case T_PTR:
#ifdef T_DNAME
- case T_DNAME: /*XXX not checked as there's no server support yet*/
+ case T_DNAME:
#endif
putchar(' ');
- (void)ns_nprint(cp, bp);
+ if (ns_nprint(cp, bp) == NULL)
+ return(NULL);
break;
+ case T_SOA:
+ if (!vflag)
+ break;
+ putchar(' ');
+ if ((cp = ns_nprint(cp, bp)) == NULL)
+ return(NULL);
+ putchar(' ');
+ if ((cp = ns_nprint(cp, bp)) == NULL)
+ return(NULL);
+ if (!TTEST2(*cp, 5 * 4))
+ return(NULL);
+ printf(" %u", EXTRACT_32BITS(cp));
+ cp += 4;
+ printf(" %u", EXTRACT_32BITS(cp));
+ cp += 4;
+ printf(" %u", EXTRACT_32BITS(cp));
+ cp += 4;
+ printf(" %u", EXTRACT_32BITS(cp));
+ cp += 4;
+ printf(" %u", EXTRACT_32BITS(cp));
+ cp += 4;
+ break;
case T_MX:
putchar(' ');
- (void)ns_nprint(cp + 2, bp);
+ if (!TTEST2(*cp, 2))
+ return(NULL);
+ if (ns_nprint(cp + 2, bp) == NULL)
+ return(NULL);
printf(" %d", EXTRACT_16BITS(cp));
break;
case T_TXT:
+ while (cp < rp) {
+ printf(" \"");
+ cp = ns_cprint(cp);
+ if (cp == NULL)
+ return(NULL);
+ putchar('"');
+ }
+ break;
+
+ case T_SRV:
putchar(' ');
- (void)ns_cprint(cp, bp);
+ if (!TTEST2(*cp, 6))
+ return(NULL);
+ if (ns_nprint(cp + 6, bp) == NULL)
+ return(NULL);
+ printf(":%d %d %d", EXTRACT_16BITS(cp + 4),
+ EXTRACT_16BITS(cp), EXTRACT_16BITS(cp + 2));
break;
#ifdef INET6
case T_AAAA:
- printf(" %s", ip6addr_string(cp));
+ {
+ struct in6_addr addr;
+ char ntop_buf[INET6_ADDRSTRLEN];
+
+ if (!TTEST2(*cp, sizeof(struct in6_addr)))
+ return(NULL);
+ memcpy(&addr, cp, sizeof(struct in6_addr));
+ printf(" %s",
+ inet_ntop(AF_INET6, &addr, ntop_buf, sizeof(ntop_buf)));
+
break;
+ }
- case T_A6: /*XXX not checked as there's no server support yet*/
+ case T_A6:
{
struct in6_addr a;
- int pbyte;
-
- pbyte = (*cp + 7) / 8;
- memset(&a, 0, sizeof(a));
- memcpy(&a, cp + 1, pbyte);
- printf(" %u %s ", *cp, ip6addr_string(&a));
- (void)ns_nprint(cp + 1 + pbyte, bp);
+ int pbit, pbyte;
+ char ntop_buf[INET6_ADDRSTRLEN];
+
+ if (!TTEST2(*cp, 1))
+ return(NULL);
+ pbit = *cp;
+ pbyte = (pbit & ~7) / 8;
+ if (pbit > 128) {
+ printf(" %u(bad plen)", pbit);
+ break;
+ } else if (pbit < 128) {
+ if (!TTEST2(*(cp + 1), sizeof(a) - pbyte))
+ return(NULL);
+ memset(&a, 0, sizeof(a));
+ memcpy(&a.s6_addr[pbyte], cp + 1, sizeof(a) - pbyte);
+ printf(" %u %s", pbit,
+ inet_ntop(AF_INET6, &a, ntop_buf, sizeof(ntop_buf)));
+ }
+ if (pbit > 0) {
+ putchar(' ');
+ if (ns_nprint(cp + 1 + sizeof(a) - pbyte, bp) == NULL)
+ return(NULL);
+ }
break;
}
#endif /*INET6*/
+ case T_OPT:
+ printf(" UDPsize=%u", class);
+ if (opt_flags & 0x8000)
+ printf(" OK");
+ break;
+
case T_UNSPECA: /* One long string */
- printf(" %.*s", len, cp);
+ if (!TTEST2(*cp, len))
+ return(NULL);
+ if (fn_printn(cp, len, snapend))
+ return(NULL);
break;
+
+ case T_TSIG:
+ {
+ if (cp + len > snapend)
+ return(NULL);
+ if (!vflag)
+ break;
+ putchar(' ');
+ if ((cp = ns_nprint(cp, bp)) == NULL)
+ return(NULL);
+ cp += 6;
+ if (!TTEST2(*cp, 2))
+ return(NULL);
+ printf(" fudge=%u", EXTRACT_16BITS(cp));
+ cp += 2;
+ if (!TTEST2(*cp, 2))
+ return(NULL);
+ printf(" maclen=%u", EXTRACT_16BITS(cp));
+ cp += 2 + EXTRACT_16BITS(cp);
+ if (!TTEST2(*cp, 2))
+ return(NULL);
+ printf(" origid=%u", EXTRACT_16BITS(cp));
+ cp += 2;
+ if (!TTEST2(*cp, 2))
+ return(NULL);
+ printf(" error=%u", EXTRACT_16BITS(cp));
+ cp += 2;
+ if (!TTEST2(*cp, 2))
+ return(NULL);
+ printf(" otherlen=%u", EXTRACT_16BITS(cp));
+ cp += 2;
+ }
}
return (rp); /* XXX This isn't always right */
}
void
-ns_print(register const u_char *bp, u_int length)
+ns_print(register const u_char *bp, u_int length, int is_mdns)
{
register const HEADER *np;
register int qdcount, ancount, nscount, arcount;
register const u_char *cp;
+ u_int16_t b2;
np = (const HEADER *)bp;
+ TCHECK(*np);
/* get the byte-order right */
- qdcount = ntohs(np->qdcount);
- ancount = ntohs(np->ancount);
- nscount = ntohs(np->nscount);
- arcount = ntohs(np->arcount);
+ qdcount = EXTRACT_16BITS(&np->qdcount);
+ ancount = EXTRACT_16BITS(&np->ancount);
+ nscount = EXTRACT_16BITS(&np->nscount);
+ arcount = EXTRACT_16BITS(&np->arcount);
- if (np->qr) {
+ if (DNS_QR(np)) {
/* this is a response */
- printf(" %d%s%s%s%s%s",
- ntohs(np->id),
- ns_ops[np->opcode],
- ns_resp[np->rcode],
- np->aa? "*" : "",
- np->ra? "" : "-",
- np->tc? "|" : "");
+ printf("%d%s%s%s%s%s%s",
+ EXTRACT_16BITS(&np->id),
+ ns_ops[DNS_OPCODE(np)],
+ ns_resp[DNS_RCODE(np)],
+ DNS_AA(np)? "*" : "",
+ DNS_RA(np)? "" : "-",
+ DNS_TC(np)? "|" : "",
+ DNS_AD(np)? "$" : "");
+
if (qdcount != 1)
printf(" [%dq]", qdcount);
/* Print QUESTION section on -vv */
- if (vflag > 1) {
- fputs(" q: ", stdout);
- cp = ns_nprint((const u_char *)(np + 1), bp);
- } else
- cp = ns_nskip((const u_char *)(np + 1), bp);
+ cp = (const u_char *)(np + 1);
+ while (qdcount--) {
+ if (qdcount < EXTRACT_16BITS(&np->qdcount) - 1)
+ putchar(',');
+ if (vflag > 1) {
+ fputs(" q:", stdout);
+ if ((cp = ns_qprint(cp, bp, is_mdns)) == NULL)
+ goto trunc;
+ } else {
+ if ((cp = ns_nskip(cp)) == NULL)
+ goto trunc;
+ cp += 4; /* skip QTYPE and QCLASS */
+ }
+ }
printf(" %d/%d/%d", ancount, nscount, arcount);
if (ancount--) {
- cp = ns_rprint(cp + 4, bp);
- while (ancount-- && cp < snapend) {
+ if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
+ goto trunc;
+ while (cp < snapend && ancount--) {
putchar(',');
- cp = ns_rprint(cp, bp);
+ if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
+ goto trunc;
}
}
+ if (ancount > 0)
+ goto trunc;
+ /* Print NS and AR sections on -vv */
+ if (vflag > 1) {
+ if (cp < snapend && nscount--) {
+ fputs(" ns:", stdout);
+ if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
+ goto trunc;
+ while (cp < snapend && nscount--) {
+ putchar(',');
+ if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
+ goto trunc;
+ }
+ }
+ if (nscount > 0)
+ goto trunc;
+ if (cp < snapend && arcount--) {
+ fputs(" ar:", stdout);
+ if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
+ goto trunc;
+ while (cp < snapend && arcount--) {
+ putchar(',');
+ if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
+ goto trunc;
+ }
+ }
+ if (arcount > 0)
+ goto trunc;
+ }
}
else {
/* this is a request */
- printf(" %d%s%s",
- ntohs(np->id),
- ns_ops[np->opcode],
- np->rd? "+" : "");
+ printf("%d%s%s%s", EXTRACT_16BITS(&np->id), ns_ops[DNS_OPCODE(np)],
+ DNS_RD(np) ? "+" : "",
+ DNS_CD(np) ? "%" : "");
/* any weirdness? */
- if (*(((u_short *)np)+1) & htons(0x6ff))
- printf(" [b2&3=0x%x]", ntohs(*(((u_short *)np)+1)));
+ b2 = EXTRACT_16BITS(((u_short *)np)+1);
+ if (b2 & 0x6cf)
+ printf(" [b2&3=0x%x]", b2);
- if (np->opcode == IQUERY) {
+ if (DNS_OPCODE(np) == IQUERY) {
if (qdcount)
printf(" [%dq]", qdcount);
if (ancount != 1)
if (arcount)
printf(" [%dau]", arcount);
- ns_qprint((const u_char *)(np + 1), (const u_char *)np);
+ cp = (const u_char *)(np + 1);
+ if (qdcount--) {
+ cp = ns_qprint(cp, (const u_char *)np, is_mdns);
+ if (!cp)
+ goto trunc;
+ while (cp < snapend && qdcount--) {
+ cp = ns_qprint((const u_char *)cp,
+ (const u_char *)np,
+ is_mdns);
+ if (!cp)
+ goto trunc;
+ }
+ }
+ if (qdcount > 0)
+ goto trunc;
+
+ /* Print remaining sections on -vv */
+ if (vflag > 1) {
+ if (ancount--) {
+ if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
+ goto trunc;
+ while (cp < snapend && ancount--) {
+ putchar(',');
+ if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
+ goto trunc;
+ }
+ }
+ if (ancount > 0)
+ goto trunc;
+ if (cp < snapend && nscount--) {
+ fputs(" ns:", stdout);
+ if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
+ goto trunc;
+ while (nscount-- && cp < snapend) {
+ putchar(',');
+ if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
+ goto trunc;
+ }
+ }
+ if (nscount > 0)
+ goto trunc;
+ if (cp < snapend && arcount--) {
+ fputs(" ar:", stdout);
+ if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
+ goto trunc;
+ while (cp < snapend && arcount--) {
+ putchar(',');
+ if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
+ goto trunc;
+ }
+ }
+ if (arcount > 0)
+ goto trunc;
+ }
}
printf(" (%d)", length);
+ return;
+
+ trunc:
+ printf("[|domain]");
+ return;
}
projects / tcpdump / blobdiff