X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/b09ea5197b84075954abd9ba9ff7e10f018c242f..5c77a341d4e766eef8beebaecd9e69bd2cc7b59b:/print-domain.c

diff --git a/print-domain.c b/print-domain.c
index b55d362d..5a67d214 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 1.83 2003-04-04 00:18:54 fenner Exp $ (LBL)";
+static const char rcsid[] _U_ =
+    "@(#) $Header: /tcpdump/master/tcpdump/print-domain.c,v 1.88 2003-11-16 09:36:18 guy Exp $ (LBL)";
 #endif
 
 #ifdef HAVE_CONFIG_H
@@ -240,56 +240,57 @@ ns_cprint(register const u_char *cp)
 	return (cp + i);
 }
 
+/* http://www.iana.org/assignments/dns-parameters */
 struct tok ns_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" },
+	{ 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" },
-	{ T_DNAME,	"DNAME" },
-	{ T_OPT,	"OPT" },
+	{ 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_A6,		"A6" },			/* RFC 2874 */
+	{ T_DNAME,	"DNAME" },		/* RFC 2672 */
+	{ T_OPT,	"OPT" },		/* RFC 2671 */
 	{ T_UINFO,	"UINFO" },
 	{ T_UID,	"UID" },
 	{ T_GID,	"GID" },
 	{ T_UNSPEC,	"UNSPEC" },
 	{ T_UNSPECA,	"UNSPECA" },
-	{ T_TKEY,	"TKEY" },
-	{ T_TSIG,	"TSIG" },
-	{ T_IXFR,	"IXFR" },
-	{ 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 }
 };
@@ -304,7 +305,7 @@ 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;
@@ -315,12 +316,14 @@ ns_qprint(register const u_char *cp, register const u_char *bp)
 		return(NULL);
 
 	/* print the qtype and qclass (if it's not IN) */
-	i = *cp++ << 8;
-	i |= *cp++;
+	i = EXTRACT_16BITS(cp);
+	cp += 2;
 	printf(" %s", tok2str(ns_type2str, "Type%d", i));
-	i = *cp++ << 8;
-	i |= *cp++;
-	if (i != C_IN)
+	i = EXTRACT_16BITS(cp);
+	cp += 2;
+	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);
@@ -330,7 +333,7 @@ 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;
@@ -347,18 +350,20 @@ ns_rprint(register const u_char *cp, register const u_char *bp)
 		return (snapend);
 
 	/* print the type/qtype and class (if it's not IN) */
-	typ = *cp++ << 8;
-	typ |= *cp++;
-	class = *cp++ << 8;
-	class |= *cp++;
-	if (class != C_IN && typ != T_OPT)
+	typ = EXTRACT_16BITS(cp);
+	cp += 2;
+	class = EXTRACT_16BITS(cp);
+	cp += 2;
+	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 */
 	cp += 4;
 
-	len = *cp++ << 8;
-	len |= *cp++;
+	len = EXTRACT_16BITS(cp);
+	cp += 2;
 
 	rp = cp + len;
 
@@ -416,8 +421,13 @@ ns_rprint(register const u_char *cp, register const u_char *bp)
 		break;
 
 	case T_TXT:
-		putchar(' ');
-		(void)ns_cprint(cp);
+		while (cp < rp) {
+			printf(" \"");
+			cp = ns_cprint(cp);
+			if (cp == NULL)
+				return(NULL);
+			putchar('"');
+		}
 		break;
 
 	case T_SRV:
@@ -512,7 +522,7 @@ 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;
@@ -536,7 +546,7 @@ 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);
@@ -547,7 +557,7 @@ 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)
@@ -557,11 +567,11 @@ 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;
 			}
 		}
@@ -571,11 +581,11 @@ 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;
 				}
 			}
@@ -583,11 +593,11 @@ 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;
 				}
 			}
@@ -599,7 +609,7 @@ 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);
@@ -625,12 +635,13 @@ 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;
 			}
@@ -641,11 +652,11 @@ 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;
 				}
 			}
@@ -653,11 +664,11 @@ 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;
 				}
 			}
@@ -665,11 +676,11 @@ 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;
 				}
 			}