X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/fd409921d94a0aff7804df31515fa42b675118b5..refs/heads/master:/print-lwres.c

diff --git a/print-lwres.c b/print-lwres.c
index f28eab97..29b49c6e 100644
--- a/print-lwres.c
+++ b/print-lwres.c
@@ -29,9 +29,7 @@
 
 /* \summary: BIND9 Lightweight Resolver protocol printer */
 
-#ifdef HAVE_CONFIG_H
 #include <config.h>
-#endif
 
 #include "netdissect-stdinc.h"
 
@@ -182,7 +180,7 @@ static const struct tok opcode[] = {
 	{ LWRES_OPCODE_GETADDRSBYNAME,	"getaddrsbyname", },
 	{ LWRES_OPCODE_GETNAMEBYADDR,	"getnamebyaddr", },
 	{ LWRES_OPCODE_GETRDATABYNAME,	"getrdatabyname", },
-	{ 0, 				NULL, },
+	{ 0,				NULL, },
 };
 
 /* print-domain.c */
@@ -191,7 +189,7 @@ extern const struct tok ns_class2str[];
 
 static unsigned
 lwres_printname(netdissect_options *ndo,
-                size_t l, const u_char *p0)
+                u_int l, const u_char *p0)
 {
 	ND_PRINT(" ");
 	nd_printjn(ndo, p0, l);
@@ -267,7 +265,7 @@ lwres_printaddr(netdissect_options *ndo,
 		}
 	}
 
-	return ND_BYTES_BETWEEN(p, p0);
+	return ND_BYTES_BETWEEN(p0, p);
 }
 
 void
@@ -291,7 +289,9 @@ lwres_print(netdissect_options *ndo,
 	if (ndo->ndo_vflag || v != LWRES_LWPACKETVERSION_0)
 		ND_PRINT(" v%u", v);
 	if (v != LWRES_LWPACKETVERSION_0) {
-		s = bp + GET_BE_U_4(np->length);
+		uint32_t pkt_len = GET_BE_U_4(np->length);
+		ND_TCHECK_LEN(bp, pkt_len);
+		s = bp + pkt_len;
 		goto tail;
 	}
 
@@ -546,7 +546,7 @@ lwres_print(netdissect_options *ndo,
 		ND_PRINT(" [len: %u != %u]", GET_BE_U_4(np->length),
 			  length);
 	}
-	if (!unsupported && ND_BYTES_BETWEEN(s, bp) < GET_BE_U_4(np->length))
+	if (!unsupported && ND_BYTES_BETWEEN(bp, s) < GET_BE_U_4(np->length))
 		ND_PRINT("[extra]");
 	return;