Removed CD bit flags from cache.

git-svn-id: file:///svn/unbound/trunk@347 be551aaa-1e26-0410-a405-d3ace91eadb9

doc/Changelog

@@ -1,3 +1,8 @@
+30 May 2007: Wouter
+	- removed FLAG_CD from message and rrset caches. This was useful for
+	  an agnostic forwarder, but not for a sophisticated (trust value per
+	  rrset enabled) cache.
+
 29 May 2007: Wouter
 	- routines to lock and unlock array of rrsets moved to cache/rrset.
 	- lookup message from msg cache (and copy to region).

iterator/iterator.c

@@ -124,8 +124,6 @@ fwd_new(struct module_qstate* qstate, int id)
 		return 0;
 	memset(iq, 0, sizeof(*iq));
 	outbound_list_init(&iq->outlist);
-	if(qstate->qinfo.has_cd)
-		flags |= BIT_CD;
 	e = (*env->send_query)(qstate->qinfo.qname, qstate->qinfo.qname_len,
 		qstate->qinfo.qtype, qstate->qinfo.qclass, flags, dnssec, 
 		&ie->fwd_addr, ie->fwd_addrlen, qstate);
@@ -403,8 +401,7 @@ processInitRequest(struct module_qstate* qstate, struct iter_qstate* iq,
 	
 	msg = dns_cache_lookup(qstate->env, qstate->qinfo.qname, 
 		qstate->qinfo.qname_len, qstate->qinfo.qtype, 
-		qstate->qinfo.qclass, qstate->qinfo.has_cd, 
-		qstate->region, qstate->scratch);
+		qstate->qinfo.qclass, qstate->region, qstate->scratch);
 	if(msg) {
 		/* handle positive cache response */
 		/*

services/cache/dns.c

@@ -317,7 +317,7 @@ tomsg(struct module_env* env, struct msgreply_entry* e, struct reply_info* r,
 struct dns_msg* 
 dns_cache_lookup(struct module_env* env,
 	uint8_t* qname, size_t qnamelen, uint16_t qtype, uint16_t qclass,
-	int has_cd, struct region* region, struct region* scratch)
+	struct region* region, struct region* scratch)
 {
 	struct lruhash_entry* e;
 	struct query_info k;
@@ -329,7 +329,6 @@ dns_cache_lookup(struct module_env* env,
 	k.qname_len = qnamelen;
 	k.qtype = qtype;
 	k.qclass = qclass;
-	k.has_cd = has_cd;
 	h = query_info_hash(&k);
 	e = slabhash_lookup(env->msg_cache, h, &k, 0);
 	if(e) {

services/cache/dns.h

@@ -94,7 +94,6 @@ struct delegpt* dns_cache_find_delegation(struct module_env* env,
  * @param qnamelen: length of qname.
  * @param qtype: query type.
  * @param qclass: query class.
- * @param has_cd: if true, CD flag is turned on for lookup.
  * @param region: where to allocate result.
  * @param scratch: where to allocate temporary data.
  * @return new response message (alloced in region, rrsets do not have IDs).
@@ -103,7 +102,7 @@ struct delegpt* dns_cache_find_delegation(struct module_env* env,
  */
 struct dns_msg* dns_cache_lookup(struct module_env* env,
 	uint8_t* qname, size_t qnamelen, uint16_t qtype, uint16_t qclass,
-	int has_cd, struct region* region, struct region* scratch);
+	struct region* region, struct region* scratch);
 
 /** Find covering DNAME */
 

util/data/msgparse.c

@@ -143,12 +143,9 @@ nsec_at_apex(ldns_buffer* pkt)
 
 /** Calculate rrset flags */
 static uint32_t
-pkt_rrset_flags(struct msg_parse* msg, ldns_buffer* pkt, uint16_t type)
+pkt_rrset_flags(ldns_buffer* pkt, uint16_t type)
 {
-	uint32_t f;
-	if(msg->flags & BIT_CD)
-		f = PACKED_RRSET_CD;
-	else	f = 0;
+	uint32_t f = 0;
 	if(type == LDNS_RR_TYPE_NSEC && nsec_at_apex(pkt)) {
 		f |= PACKED_RRSET_NSEC_AT_APEX;
 	}
@@ -450,7 +447,7 @@ find_rrset(struct msg_parse* msg, ldns_buffer* pkt, uint8_t* dname,
 		}
 	}
 	/* find by hashing and lookup in hashtable */
-	*rrset_flags = pkt_rrset_flags(msg, pkt, type);
+	*rrset_flags = pkt_rrset_flags(pkt, type);
 	
 	/* if rrsig - try to lookup matching data set first */
 	if(type == LDNS_RR_TYPE_RRSIG && pkt_rrsig_covered(pkt, 

util/data/msgreply.c

@@ -71,9 +71,6 @@ parse_create_qinfo(ldns_buffer* pkt, struct msg_parse* msg,
 	qinf->qname_len = msg->qname_len;
 	qinf->qtype = msg->qtype;
 	qinf->qclass = msg->qclass;
-	qinf->has_cd = 0;
-	if(msg->flags & BIT_CD)
-		qinf->has_cd = 1;
 	return 1;
 }
 
@@ -427,7 +424,6 @@ query_info_parse(struct query_info* m, ldns_buffer* query)
 	log_assert(LDNS_OPCODE_WIRE(q) == LDNS_PACKET_QUERY);
 	log_assert(LDNS_QDCOUNT(q) == 1);
 	log_assert(ldns_buffer_position(query) == 0);
-	m->has_cd = LDNS_CD_WIRE(q)?1:0;
 	ldns_buffer_skip(query, LDNS_HEADER_SIZE);
 	m->qname = ldns_buffer_current(query);
 	if((m->qname_len = query_dname_len(query)) == 0)
@@ -468,7 +464,6 @@ query_info_compare(void* m1, void* m2)
 	if((mc = query_dname_compare(msg1->qname, msg2->qname)) != 0)
 		return mc;
 	log_assert(msg1->qname_len == msg2->qname_len);
-	COMPARE_IT(msg1->has_cd, msg2->has_cd);
 	COMPARE_IT(msg1->qclass, msg2->qclass);
 	return 0;
 #undef COMPARE_IT
@@ -518,7 +513,6 @@ query_info_hash(struct query_info *q)
 	hashvalue_t h = 0xab;
 	h = hashlittle(&q->qtype, sizeof(q->qtype), h);
 	h = hashlittle(&q->qclass, sizeof(q->qclass), h);
-	h = hashlittle(&q->has_cd, sizeof(q->has_cd), h);
 	h = dname_query_hash(q->qname, h);
 	return h;
 }
@@ -1161,8 +1155,6 @@ void
 qinfo_query_encode(ldns_buffer* pkt, struct query_info* qinfo)
 {
 	uint16_t flags = 0; /* QUERY, NOERROR */
-	if(qinfo->has_cd)
-		flags |= BIT_CD;
 	ldns_buffer_clear(pkt);
 	log_assert(ldns_buffer_remaining(pkt) >= 12+255+4/*max query*/);
 	ldns_buffer_skip(pkt, 2); /* id done later */

util/data/msgreply.h

@@ -66,8 +66,6 @@ struct query_info {
 	uint16_t qtype;
 	/** qclass, host byte order */
 	uint16_t qclass;
-	/** does query have CD bit set */
-	int has_cd;
 };
 
 /**

util/data/packed_rrset.h

@@ -48,10 +48,8 @@ struct alloc_cache;
  * clearing the cache. */
 typedef uint64_t rrset_id_t;
 
-/** this rrset is NSEC/NSEC3 and is at zone apex (at child size of zonecut) */
+/** this rrset is NSEC and is at zone apex (at child side of zonecut) */
 #define PACKED_RRSET_NSEC_AT_APEX 0x1
-/** this rrset was obtained and is used for checking-disabled replies. */
-#define PACKED_RRSET_CD 0x2
 
 /**
  * The identifying information for an RRset.
@@ -70,7 +68,6 @@ struct packed_rrset_key {
 	/**
 	 * Flags. 32bit to be easy for hashing:
 	 * 	o PACKED_RRSET_NSEC_AT_APEX
-	 * 	o PACKED_RRSET_CD
 	 */
 	uint32_t flags;
 	/** the rrset type in network format */