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parse setup.

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git-svn-id: file:///svn/unbound/trunk@236 be551aaa-1e26-0410-a405-d3ace91eadb9
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Wouter Wijngaards 2007-04-10 09:03:05 +00:00
parent 6b90203bce
commit 01fa72378f
2 changed files with 89 additions and 0 deletions
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1
doc/Changelog
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@ -6,6 +6,7 @@
- set alloc special type to ub_packed_rrset_key.
Uses lruhash entry overflow chain next pointer in alloc cache.
- doxygen documentation for region-allocator.
- setup for parse scratch data.
5 April 2007: Wouter
- discussed packed rrset with Jelte.

88
util/data/msgreply.c
View file

@ -47,9 +47,97 @@
#include "util/net_help.h"
#include "util/data/dname.h"
struct rrset_parse;
struct rr_parse;
/** number of buckets in parse rrset hash table. */
#define PARSE_TABLE_SIZE 1024
/**
* Data stored in scratch pad memory during parsing.
* Stores the data that will enter into the msgreply and packet result.
*/
struct msg_parse {
/** flags from message, host format. */
uint16_t flags;
/** count of RRs, host format */
uint16_t qdcount;
/** count of RRs, host format */
uint16_t ancount;
/** count of RRs, host format */
uint16_t nscount;
/** count of RRs, host format */
uint16_t arcount;
/** count of RRsets per section. */
size_t an_rrsets;
/** count of RRsets per section. */
size_t ns_rrsets;
/** count of RRsets per section. */
size_t ar_rrsets;
/** total number of rrsets found. */
size_t rrset_count;
/** query dname (pointer to start location in packet, NULL if none */
uint8_t* qname;
/** length of query dname in octets, 0 if none */
size_t qname_len;
/** query type, network order. 0 if qdcount=0 */
uint16_t qtype;
/** query class, network order. 0 if qdcount=0 */
uint16_t qclass;
/**
* Hash table array used during parsing to lookup rrset types.
* Based on name, type, class. Same hash value as in rrset cache.
*/
struct rrset_parse* hashtable[PARSE_TABLE_SIZE];
/** linked list of rrsets that have been found (in order). */
struct rrset_parse* rrset_first;
/** last element of rrset list. */
struct rrset_parse* rrset_last;
};
/**
* Data stored for an rrset during parsing.
*/
struct rrset_parse {
/** next in hash bucket */
struct rrset_parse* rrset_bucket_next;
/** next in list of all rrsets */
struct rrset_parse* rrset_all_next;
/** hash value of rrset */
hashvalue_t hash;
/** start of (possibly compressed) dname in packet */
uint8_t* dname;
/** type, network order. */
uint16_t type;
/** class, network order. name so that it is not a c++ keyword. */
uint16_t rrset_class;
/** linked list of RRs in this rrset. */
struct rr_parse* rr_first;
/** last in list of RRs in this rrset. */
struct rr_parse* rr_last;
};
/**
* Data stored for an RR during parsing.
*/
struct rr_parse {
/**
* Pointer to the RR. Points to start of TTL value in the packet.
* Rdata length and rdata follow it.
* its dname, type and class are the same and stored for the rrset.
*/
uint8_t* ttl_data;
/** next in list of RRs. */
struct rr_parse* next;
};
int reply_info_parse(ldns_buffer* pkt, struct alloc_cache* alloc,
struct query_info* qinf, struct reply_info** rep)
{
/* use scratch pad region-allocator during parsing. */
return LDNS_RCODE_SERVFAIL;
}