X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/39727479314a287fae9a03c63d8a98f9725d6051..01fe0ebe27b2fe957f699ffa4dbdedc46e12f85b:/print-domain.c

diff --git a/print-domain.c b/print-domain.c
index 0ffa872d..a50e5918 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 1.84 2003-04-04 03:49:25 fenner Exp $ (LBL)";
+static const char rcsid[] _U_ =
+    "@(#) $Header: /tcpdump/master/tcpdump/print-domain.c,v 1.89.2.1 2005-04-20 20:59:00 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)
@@ -305,7 +306,7 @@ 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;
@@ -321,7 +322,9 @@ ns_qprint(register const u_char *cp, register const u_char *bp)
 	printf(" %s", tok2str(ns_type2str, "Type%d", i));
 	i = EXTRACT_16BITS(cp);
 	cp += 2;
-	if (i != C_IN)
+	if (is_mdns && i == (C_IN|C_CACHE_FLUSH))
+		printf(" (Cache flush)");
+	else if (i != C_IN)
 		printf(" %s", tok2str(ns_class2str, "(Class %d)", i));
 
 	fputs("? ", stdout);
@@ -331,7 +334,7 @@ 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_short typ, len;
@@ -352,7 +355,9 @@ ns_rprint(register const u_char *cp, register const u_char *bp)
 	cp += 2;
 	class = EXTRACT_16BITS(cp);
 	cp += 2;
-	if (class != C_IN && typ != T_OPT)
+	if (is_mdns && class == (C_IN|C_CACHE_FLUSH))
+		printf(" (Cache flush)");
+	else if (class != C_IN && typ != T_OPT)
 		printf(" %s", tok2str(ns_class2str, "(Class %d)", class));
 
 	/* ignore ttl */
@@ -518,7 +523,7 @@ 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;
@@ -542,7 +547,7 @@ ns_print(register const u_char *bp, u_int length)
 			DNS_AA(np)? "*" : "",
 			DNS_RA(np)? "" : "-",
 			DNS_TC(np)? "|" : "",
-			DNS_CD(np)? "%" : "");
+			DNS_AD(np)? "$" : "");
 
 		if (qdcount != 1)
 			printf(" [%dq]", qdcount);
@@ -553,7 +558,7 @@ 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 +568,11 @@ 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 +582,11 @@ 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 +594,11 @@ 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;
 				}
 			}
@@ -605,7 +610,7 @@ ns_print(register const u_char *bp, u_int length)
 		/* this is a request */
 		printf(" %d%s%s%s", EXTRACT_16BITS(&np->id), ns_ops[DNS_OPCODE(np)],
 		    DNS_RD(np) ? "+" : "",
-		    DNS_AD(np) ? "$" : "");
+		    DNS_CD(np) ? "%" : "");
 
 		/* any weirdness? */
 		b2 = EXTRACT_16BITS(((u_short *)np)+1);
@@ -631,12 +636,13 @@ 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 +653,11 @@ 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 +665,11 @@ 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 +677,11 @@ 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;
 				}
 			}