From: Miek Gieben <miekg@NLnetLabs.nl>
Date: Tue, 15 Feb 2005 12:47:46 +0000 (+0000)
Subject: documented packets types
X-Git-Tag: release-0.50~414
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=fc5a2376d2df6bb79be2baf54a6c04f462eb3b0a;p=thirdparty%2Fldns.git

documented packets types
---

diff --git a/doc/PacketTypes b/doc/PacketTypes
new file mode 100644
index 00000000..9e9b79d6
--- /dev/null
+++ b/doc/PacketTypes
@@ -0,0 +1,77 @@
+Packet Types
+
+In DNS a packet can have a type, like NXDOMAIN or NODATA. Some of these
+types have been standardized and others have not. In ldns we have tried
+to formalize some of these constructs. This is all without DNSSEC.
+
+We currently differentiate between the following types:
+1. question
+2. referral
+3. answer
+4. nxdomain
+5. nodata
+6. servfail
+
+Properties of each type:
+
+QUESTION: look at the header bits???? Make it flageable?
+We should never have to look at the additional section.
+
+1. QUESTION
+	QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0
+	1 RR 
+		located in question section
+	bits: qr off
+	status: NOERROR
+
+2. REFERRAL
+	QUERY: 1, ANSWER: 0, AUTHORITY: X, ADDITIONAL: 0
+	1 RR 
+		located in question section
+	X RRs
+		located in the authority section 
+		(sometimes they are also put in the answer section...)
+		these are all NS records
+	bits: aa off
+	status: NOERROR
+
+3. ANSWER
+	QUERY: 1, ANSWER: X, AUTHORITY: 1+, ADDITIONAL: 0
+	1 RR 
+		located in question section
+	X RRs
+		located in the answer section
+	1+ RR(s)
+		located in the authority section
+		should be of type NS
+	bits: aa on or off
+	status: NOERROR
+
+4. NXDOMAIN
+	QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
+	1 RR 
+		located in question section
+	1 RR
+		located in the authority section
+		name should be of a zone above the one your looking for
+		type must be SOA (is it?)
+	bits: N/A
+	status: NXDOMAIN
+
+5. NODATA
+	QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
+	1 RR 
+		located in question section
+	1 RR
+		located in the authority section
+		name should be of a zone above the one your looking for
+		type must be SOA (is it?)
+	bits: N/A
+	status: NOERROR
+		
+6. SERVFAIL:
+	QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0
+	1 RR 
+		located in question section
+	bits: N/A
+	status: SERVFAIL