It's reserved, and should be 0 at all times, but I'd like to see that it
is indeed 0.
Attached patch against 0.9.12.
--- packet-dns.c Sat Feb 1 01:08:46 2003
+++ packet-dns.y.c Tue May 6 13:09:28 2003
@@ -51,6 +51,7 @@
static int hf_dns_flags_truncated = -1;
static int hf_dns_flags_recdesired = -1;
static int hf_dns_flags_recavail = -1;
+static int hf_dns_flags_z = -1;
static int hf_dns_flags_authenticated = -1;
static int hf_dns_flags_checkdisable = -1;
static int hf_dns_flags_rcode = -1;
@@ -157,6 +158,7 @@
#define F_TRUNCATED (1<<9) /* response is truncated */
#define F_RECDESIRED (1<<8) /* recursion desired */
#define F_RECAVAIL (1<<7) /* recursion available */
+#define F_Z (1<<6) /* Z */
#define F_AUTHENTIC (1<<5) /* authentic data (RFC2535) */
#define F_CHECKDISABLE (1<<4) /* checking disabled (RFC2535) */
#define F_RCODE (0xF<<0) /* reply code */
@@ -186,6 +188,11 @@
"Server can't do recursive queries"
};
+static const true_false_string tfs_flags_z = {
+ "reserved - incorrect!",
+ "reserved (0)"
+};
+
static const true_false_string tfs_flags_authenticated = {
"Answer/authority portion was authenticated by the server",
"Answer/authority portion was not authenticated by the server"
@@ -1995,11 +2002,15 @@
if (flags & F_RESPONSE) {
proto_tree_add_item(field_tree, hf_dns_flags_recavail,
tvb, offset + DNS_FLAGS, 2, FALSE);
+ proto_tree_add_item(field_tree, hf_dns_flags_z,
+ tvb, offset + DNS_FLAGS, 2, FALSE);
proto_tree_add_item(field_tree, hf_dns_flags_authenticated,
tvb, offset + DNS_FLAGS, 2, FALSE);
proto_tree_add_item(field_tree, hf_dns_flags_rcode,
tvb, offset + DNS_FLAGS, 2, FALSE);
} else {
+ proto_tree_add_item(field_tree, hf_dns_flags_z,
+ tvb, offset + DNS_FLAGS, 2, FALSE);
proto_tree_add_item(field_tree, hf_dns_flags_checkdisable,
tvb, offset + DNS_FLAGS, 2, FALSE);
}
@@ -2149,6 +2160,10 @@
{ "Recursion available", "dns.flags.recavail",
FT_BOOLEAN, 16, TFS(&tfs_flags_recavail), F_RECAVAIL,
"Can the server do recursive queries?", HFILL }},
+ { &hf_dns_flags_z,
+ { "Z", "dns.flags.z",
+ FT_BOOLEAN, 16, TFS(&tfs_flags_z), F_Z,
+ "Z flag", HFILL }},
{ &hf_dns_flags_authenticated,
{ "Answer authenticated", "dns.flags.authenticated",
FT_BOOLEAN, 16, TFS(&tfs_flags_authenticated), F_AUTHENTIC,
