Electroneum
packed_rrset_data Struct Reference

#include <packed_rrset.h>

Collaboration diagram for packed_rrset_data:

Public Attributes

time_t ttl
 
size_t count
 
size_t rrsig_count
 
enum rrset_trust trust
 
enum sec_status security
 
size_t * rr_len
 
time_t * rr_ttl
 
uint8_t ** rr_data
 

Detailed Description

RRset data.

The data is packed, stored contiguously in memory.

It is not always stored contiguously, in that case, an unpacked-packed rrset has the arrays separate. A bunch of routines work on that, but the packed rrset that is contiguous is for the rrset-cache and the cache-response routines in daemon/worker.c.

memory layout: o base struct o rr_len size_t array o rr_data uint8_t* array o rr_ttl time_t array (after size_t and ptrs because those may be 64bit and this array before those would make them unaligned). Since the stuff before is 32/64bit, rr_ttl is 32 bit aligned. o rr_data rdata wireformats o rrsig_data rdata wireformat(s)

Rdata is stored in wireformat. The dname is stored in wireformat. TTLs are stored as absolute values (and could be expired).

RRSIGs are stored in the arrays after the regular rrs.

You need the packed_rrset_key to know dname, type, class of the resource records in this RRset. (if signed the rrsig gives the type too).

On the wire an RR is: name, type, class, ttl, rdlength, rdata. So we need to send the following per RR: key.dname, ttl, rr_data[i]. since key.dname ends with type and class. and rr_data starts with the rdlength. the ttl value to send changes due to time.

Definition at line 235 of file packed_rrset.h.

Member Data Documentation

◆ count

size_t packed_rrset_data::count

number of rrs.

Definition at line 240 of file packed_rrset.h.

◆ rr_data

uint8_t** packed_rrset_data::rr_data

Array of pointers to every rr's rdata. The rr_data[i] rdata is stored in uncompressed wireformat. The first uint16_t of rr_data[i] is network format rdlength.

rr_data[count] to rr_data[count+rrsig_count] contain the rrsig data.

Definition at line 258 of file packed_rrset.h.

◆ rr_len

size_t* packed_rrset_data::rr_len

length of every rr's rdata, rr_len[i] is size of rr_data[i].

Definition at line 248 of file packed_rrset.h.

◆ rr_ttl

time_t* packed_rrset_data::rr_ttl

ttl of every rr. rr_ttl[i] ttl of rr i.

Definition at line 250 of file packed_rrset.h.

◆ rrsig_count

size_t packed_rrset_data::rrsig_count

number of rrsigs, if 0 no rrsigs

Definition at line 242 of file packed_rrset.h.

◆ security

enum sec_status packed_rrset_data::security

security status of the rrset data

Definition at line 246 of file packed_rrset.h.

◆ trust

enum rrset_trust packed_rrset_data::trust

the trustworthiness of the rrset data

Definition at line 244 of file packed_rrset.h.

◆ ttl

time_t packed_rrset_data::ttl

TTL (in seconds like time()) of the rrset. Same for all RRs see rfc2181(5.2).

Definition at line 238 of file packed_rrset.h.


The documentation for this struct was generated from the following file: