X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/454da6698381af918b5ec804874c8ca934b02817..05ec05a87b3a7c6983a16b5ae62d0f1512c4ce89:/print-domain.c

diff --git a/print-domain.c b/print-domain.c
index 6173521d..4bf1a52d 100644
--- a/print-domain.c
+++ b/print-domain.c
@@ -20,8 +20,8 @@
  */
 
 #ifndef lint
-static const char rcsid[] =
-    "@(#) $Header: /tcpdump/master/tcpdump/print-domain.c,v 1.85 2003-09-25 22:30:22 guy Exp $ (LBL)";
+static const char rcsid[] _U_ =
+    "@(#) $Header: /tcpdump/master/tcpdump/print-domain.c,v 1.98 2007-12-09 01:40:32 guy Exp $ (LBL)";
 #endif
 
 #ifdef HAVE_CONFIG_H
@@ -89,7 +89,6 @@ static const u_char *
 blabel_print(const u_char *cp)
 {
 	int bitlen, slen, b;
-	int truncated = 0;
 	const u_char *bitp, *lim;
 	char tc;
 
@@ -98,27 +97,28 @@ blabel_print(const u_char *cp)
 	if ((bitlen = *cp) == 0)
 		bitlen = 256;
 	slen = (bitlen + 3) / 4;
-	if ((lim = cp + 1 + slen) > snapend) {
-		truncated = 1;
-		lim = snapend;
-	}
+	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++)
+	for (bitp = cp + 1, b = bitlen; bitp < lim && b > 7; b -= 8, bitp++) {
+		TCHECK(*bitp);
 		printf("%02x", *bitp);
-	if (bitp == lim)
-		printf("...");
-	else if (b > 4) {
+	}
+	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(truncated ? NULL : lim);
+	return lim;
+trunc:
+	printf(".../%d]", bitlen);
+	return NULL;
 }
 
 static int
@@ -131,9 +131,10 @@ labellen(const u_char *cp)
 	i = *cp;
 	if ((i & INDIR_MASK) == EDNS0_MASK) {
 		int bitlen, elt;
-
-		if ((elt = (i & ~INDIR_MASK)) != EDNS0_ELT_BITLABEL)
+		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)
@@ -143,7 +144,7 @@ labellen(const u_char *cp)
 		return(i);
 }
 
-static const u_char *
+const u_char *
 ns_nprint(register const u_char *cp, register const u_char *bp)
 {
 	register u_int i, l;
@@ -277,9 +278,20 @@ struct tok ns_type2str[] = {
 	{ 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" },
 	{ T_UID,	"UID" },
 	{ T_GID,	"GID" },
@@ -305,24 +317,35 @@ struct tok ns_class2str[] = {
 
 /* print a query */
 static const u_char *
-ns_qprint(register const u_char *cp, register const u_char *bp)
+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;
+	register u_int i, class;
 
 	cp = ns_nskip(cp);
 
 	if (cp == NULL || !TTEST2(*cp, 4))
 		return(NULL);
 
-	/* print the qtype and qclass (if it's not IN) */
+	/* 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 (i != C_IN)
-		printf(" %s", tok2str(ns_class2str, "(Class %d)", i));
+	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);
 	cp = ns_nprint(np, bp);
@@ -331,9 +354,9 @@ ns_qprint(register const u_char *cp, register const u_char *bp)
 
 /* 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 class;
+	register u_int i, class, opt_flags = 0;
 	register u_short typ, len;
 	register const u_char *rp;
 
@@ -347,16 +370,39 @@ ns_rprint(register const u_char *cp, register const u_char *bp)
 	if (cp == NULL || !TTEST2(*cp, 10))
 		return (snapend);
 
-	/* print the type/qtype and class (if it's not IN) */
+	/* print the type/qtype */
 	typ = EXTRACT_16BITS(cp);
 	cp += 2;
-	class = EXTRACT_16BITS(cp);
+	/* 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 = EXTRACT_16BITS(cp);
 	cp += 2;
@@ -371,7 +417,7 @@ ns_rprint(register const u_char *cp, register const u_char *bp)
 	case T_A:
 		if (!TTEST2(*cp, sizeof(struct in_addr)))
 			return(NULL);
-		printf(" %s", ipaddr_string(cp));
+		printf(" %s", intoa(htonl(EXTRACT_32BITS(cp))));
 		break;
 
 	case T_NS:
@@ -438,15 +484,24 @@ ns_rprint(register const u_char *cp, register const u_char *bp)
 
 #ifdef INET6
 	case T_AAAA:
+	    {
+		struct in6_addr addr;
+		char ntop_buf[INET6_ADDRSTRLEN];
+
 		if (!TTEST2(*cp, sizeof(struct in6_addr)))
 			return(NULL);
-		printf(" %s", ip6addr_string(cp));
+		memcpy(&addr, cp, sizeof(struct in6_addr));
+		printf(" %s",
+		    inet_ntop(AF_INET6, &addr, ntop_buf, sizeof(ntop_buf)));
+
 		break;
+	    }
 
 	case T_A6:
 	    {
 		struct in6_addr a;
 		int pbit, pbyte;
+		char ntop_buf[INET6_ADDRSTRLEN];
 
 		if (!TTEST2(*cp, 1))
 			return(NULL);
@@ -460,7 +515,8 @@ ns_rprint(register const u_char *cp, register const u_char *bp)
 				return(NULL);
 			memset(&a, 0, sizeof(a));
 			memcpy(&a.s6_addr[pbyte], cp + 1, sizeof(a) - pbyte);
-			printf(" %u %s", pbit, ip6addr_string(&a));
+			printf(" %u %s", pbit,
+			    inet_ntop(AF_INET6, &a, ntop_buf, sizeof(ntop_buf)));
 		}
 		if (pbit > 0) {
 			putchar(' ');
@@ -473,6 +529,8 @@ ns_rprint(register const u_char *cp, register const u_char *bp)
 
 	case T_OPT:
 		printf(" UDPsize=%u", class);
+		if (opt_flags & 0x8000)
+			printf(" OK");
 		break;
 
 	case T_UNSPECA:		/* One long string */
@@ -518,7 +576,7 @@ ns_rprint(register const u_char *cp, register const u_char *bp)
 }
 
 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;
@@ -535,7 +593,7 @@ ns_print(register const u_char *bp, u_int length)
 
 	if (DNS_QR(np)) {
 		/* this is a response */
-		printf(" %d%s%s%s%s%s%s",
+		printf("%d%s%s%s%s%s%s",
 			EXTRACT_16BITS(&np->id),
 			ns_ops[DNS_OPCODE(np)],
 			ns_resp[DNS_RCODE(np)],
@@ -553,7 +611,7 @@ ns_print(register const u_char *bp, u_int length)
 				putchar(',');
 			if (vflag > 1) {
 				fputs(" q:", stdout);
-				if ((cp = ns_qprint(cp, bp)) == NULL)
+				if ((cp = ns_qprint(cp, bp, is_mdns)) == NULL)
 					goto trunc;
 			} else {
 				if ((cp = ns_nskip(cp)) == NULL)
@@ -563,11 +621,11 @@ ns_print(register const u_char *bp, u_int length)
 		}
 		printf(" %d/%d/%d", ancount, nscount, arcount);
 		if (ancount--) {
-			if ((cp = ns_rprint(cp, bp)) == NULL)
+			if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
 				goto trunc;
 			while (cp < snapend && ancount--) {
 				putchar(',');
-				if ((cp = ns_rprint(cp, bp)) == NULL)
+				if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
 					goto trunc;
 			}
 		}
@@ -577,11 +635,11 @@ ns_print(register const u_char *bp, u_int length)
 		if (vflag > 1) {
 			if (cp < snapend && nscount--) {
 				fputs(" ns:", stdout);
-				if ((cp = ns_rprint(cp, bp)) == NULL)
+				if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
 					goto trunc;
 				while (cp < snapend && nscount--) {
 					putchar(',');
-					if ((cp = ns_rprint(cp, bp)) == NULL)
+					if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
 						goto trunc;
 				}
 			}
@@ -589,11 +647,11 @@ ns_print(register const u_char *bp, u_int length)
 				goto trunc;
 			if (cp < snapend && arcount--) {
 				fputs(" ar:", stdout);
-				if ((cp = ns_rprint(cp, bp)) == NULL)
+				if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
 					goto trunc;
 				while (cp < snapend && arcount--) {
 					putchar(',');
-					if ((cp = ns_rprint(cp, bp)) == NULL)
+					if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
 						goto trunc;
 				}
 			}
@@ -603,7 +661,7 @@ ns_print(register const u_char *bp, u_int length)
 	}
 	else {
 		/* this is a request */
-		printf(" %d%s%s%s", EXTRACT_16BITS(&np->id), ns_ops[DNS_OPCODE(np)],
+		printf("%d%s%s%s", EXTRACT_16BITS(&np->id), ns_ops[DNS_OPCODE(np)],
 		    DNS_RD(np) ? "+" : "",
 		    DNS_CD(np) ? "%" : "");
 
@@ -631,12 +689,13 @@ ns_print(register const u_char *bp, u_int length)
 
 		cp = (const u_char *)(np + 1);
 		if (qdcount--) {
-			cp = ns_qprint(cp, (const u_char *)np);
+			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);
+					       (const u_char *)np,
+					       is_mdns);
 				if (!cp)
 					goto trunc;
 			}
@@ -647,11 +706,11 @@ ns_print(register const u_char *bp, u_int length)
 		/* Print remaining sections on -vv */
 		if (vflag > 1) {
 			if (ancount--) {
-				if ((cp = ns_rprint(cp, bp)) == NULL)
+				if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
 					goto trunc;
 				while (cp < snapend && ancount--) {
 					putchar(',');
-					if ((cp = ns_rprint(cp, bp)) == NULL)
+					if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
 						goto trunc;
 				}
 			}
@@ -659,11 +718,11 @@ ns_print(register const u_char *bp, u_int length)
 				goto trunc;
 			if (cp < snapend && nscount--) {
 				fputs(" ns:", stdout);
-				if ((cp = ns_rprint(cp, bp)) == NULL)
+				if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
 					goto trunc;
 				while (nscount-- && cp < snapend) {
 					putchar(',');
-					if ((cp = ns_rprint(cp, bp)) == NULL)
+					if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
 						goto trunc;
 				}
 			}
@@ -671,11 +730,11 @@ ns_print(register const u_char *bp, u_int length)
 				goto trunc;
 			if (cp < snapend && arcount--) {
 				fputs(" ar:", stdout);
-				if ((cp = ns_rprint(cp, bp)) == NULL)
+				if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
 					goto trunc;
 				while (cp < snapend && arcount--) {
 					putchar(',');
-					if ((cp = ns_rprint(cp, bp)) == NULL)
+					if ((cp = ns_rprint(cp, bp, is_mdns)) == NULL)
 						goto trunc;
 				}
 			}