unbound/util/data/packed_rrset.c

416 lines
12 KiB
C

/*
* util/data/packed_rrset.c - data storage for a set of resource records.
*
* Copyright (c) 2007, NLnet Labs. All rights reserved.
*
* This software is open source.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of the NLNET LABS nor the names of its contributors may
* be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/**
* \file
*
* This file contains the data storage for RRsets.
*/
#include "config.h"
#include "util/data/msgparse.h"
#include "util/data/packed_rrset.h"
#include "util/data/dname.h"
#include "util/storage/lookup3.h"
#include "util/log.h"
#include "util/alloc.h"
#include "util/regional.h"
#include "util/net_help.h"
#include "sldns/rrdef.h"
#include "sldns/sbuffer.h"
#include "sldns/wire2str.h"
void
ub_packed_rrset_parsedelete(struct ub_packed_rrset_key* pkey,
struct alloc_cache* alloc)
{
if(!pkey)
return;
free(pkey->entry.data);
pkey->entry.data = NULL;
free(pkey->rk.dname);
pkey->rk.dname = NULL;
pkey->id = 0;
alloc_special_release(alloc, pkey);
}
size_t
ub_rrset_sizefunc(void* key, void* data)
{
struct ub_packed_rrset_key* k = (struct ub_packed_rrset_key*)key;
struct packed_rrset_data* d = (struct packed_rrset_data*)data;
size_t s = sizeof(struct ub_packed_rrset_key) + k->rk.dname_len;
s += packed_rrset_sizeof(d) + lock_get_mem(&k->entry.lock);
return s;
}
size_t
packed_rrset_sizeof(struct packed_rrset_data* d)
{
size_t s;
if(d->rrsig_count > 0) {
s = ((uint8_t*)d->rr_data[d->count+d->rrsig_count-1] -
(uint8_t*)d) + d->rr_len[d->count+d->rrsig_count-1];
} else {
log_assert(d->count > 0);
s = ((uint8_t*)d->rr_data[d->count-1] - (uint8_t*)d) +
d->rr_len[d->count-1];
}
return s;
}
int
ub_rrset_compare(void* k1, void* k2)
{
struct ub_packed_rrset_key* key1 = (struct ub_packed_rrset_key*)k1;
struct ub_packed_rrset_key* key2 = (struct ub_packed_rrset_key*)k2;
int c;
if(key1 == key2)
return 0;
if(key1->rk.type != key2->rk.type) {
if(key1->rk.type < key2->rk.type)
return -1;
return 1;
}
if(key1->rk.dname_len != key2->rk.dname_len) {
if(key1->rk.dname_len < key2->rk.dname_len)
return -1;
return 1;
}
if((c=query_dname_compare(key1->rk.dname, key2->rk.dname)) != 0)
return c;
if(key1->rk.rrset_class != key2->rk.rrset_class) {
if(key1->rk.rrset_class < key2->rk.rrset_class)
return -1;
return 1;
}
if(key1->rk.flags != key2->rk.flags) {
if(key1->rk.flags < key2->rk.flags)
return -1;
return 1;
}
return 0;
}
void
ub_rrset_key_delete(void* key, void* userdata)
{
struct ub_packed_rrset_key* k = (struct ub_packed_rrset_key*)key;
struct alloc_cache* a = (struct alloc_cache*)userdata;
k->id = 0;
free(k->rk.dname);
k->rk.dname = NULL;
alloc_special_release(a, k);
}
void
rrset_data_delete(void* data, void* ATTR_UNUSED(userdata))
{
struct packed_rrset_data* d = (struct packed_rrset_data*)data;
free(d);
}
int
rrsetdata_equal(struct packed_rrset_data* d1, struct packed_rrset_data* d2)
{
size_t i;
size_t total;
if(d1->count != d2->count || d1->rrsig_count != d2->rrsig_count)
return 0;
total = d1->count + d1->rrsig_count;
for(i=0; i<total; i++) {
if(d1->rr_len[i] != d2->rr_len[i])
return 0;
if(memcmp(d1->rr_data[i], d2->rr_data[i], d1->rr_len[i]) != 0)
return 0;
}
return 1;
}
hashvalue_type
rrset_key_hash(struct packed_rrset_key* key)
{
/* type is hashed in host order */
uint16_t t = ntohs(key->type);
/* Note this MUST be identical to pkt_hash_rrset in msgparse.c */
/* this routine does not have a compressed name */
hashvalue_type h = 0xab;
h = dname_query_hash(key->dname, h);
h = hashlittle(&t, sizeof(t), h);
h = hashlittle(&key->rrset_class, sizeof(uint16_t), h);
h = hashlittle(&key->flags, sizeof(uint32_t), h);
return h;
}
void
packed_rrset_ptr_fixup(struct packed_rrset_data* data)
{
size_t i;
size_t total = data->count + data->rrsig_count;
uint8_t* nextrdata;
/* fixup pointers in packed rrset data */
data->rr_len = (size_t*)((uint8_t*)data +
sizeof(struct packed_rrset_data));
data->rr_data = (uint8_t**)&(data->rr_len[total]);
data->rr_ttl = (time_t*)&(data->rr_data[total]);
nextrdata = (uint8_t*)&(data->rr_ttl[total]);
for(i=0; i<total; i++) {
data->rr_data[i] = nextrdata;
nextrdata += data->rr_len[i];
}
}
void
get_cname_target(struct ub_packed_rrset_key* rrset, uint8_t** dname,
size_t* dname_len)
{
struct packed_rrset_data* d;
size_t len;
if(ntohs(rrset->rk.type) != LDNS_RR_TYPE_CNAME &&
ntohs(rrset->rk.type) != LDNS_RR_TYPE_DNAME)
return;
d = (struct packed_rrset_data*)rrset->entry.data;
if(d->count < 1)
return;
if(d->rr_len[0] < 3) /* at least rdatalen + 0byte root label */
return;
len = sldns_read_uint16(d->rr_data[0]);
if(len != d->rr_len[0] - sizeof(uint16_t))
return;
if(dname_valid(d->rr_data[0]+sizeof(uint16_t), len) != len)
return;
*dname = d->rr_data[0]+sizeof(uint16_t);
*dname_len = len;
}
void
packed_rrset_ttl_add(struct packed_rrset_data* data, time_t add)
{
size_t i;
size_t total = data->count + data->rrsig_count;
data->ttl_add = add;
data->ttl += add;
for(i=0; i<total; i++)
data->rr_ttl[i] += add;
}
const char*
rrset_trust_to_string(enum rrset_trust s)
{
switch(s) {
case rrset_trust_none: return "rrset_trust_none";
case rrset_trust_add_noAA: return "rrset_trust_add_noAA";
case rrset_trust_auth_noAA: return "rrset_trust_auth_noAA";
case rrset_trust_add_AA: return "rrset_trust_add_AA";
case rrset_trust_nonauth_ans_AA:return "rrset_trust_nonauth_ans_AA";
case rrset_trust_ans_noAA: return "rrset_trust_ans_noAA";
case rrset_trust_glue: return "rrset_trust_glue";
case rrset_trust_auth_AA: return "rrset_trust_auth_AA";
case rrset_trust_ans_AA: return "rrset_trust_ans_AA";
case rrset_trust_sec_noglue: return "rrset_trust_sec_noglue";
case rrset_trust_prim_noglue: return "rrset_trust_prim_noglue";
case rrset_trust_validated: return "rrset_trust_validated";
case rrset_trust_ultimate: return "rrset_trust_ultimate";
}
return "unknown_rrset_trust_value";
}
const char*
sec_status_to_string(enum sec_status s)
{
switch(s) {
case sec_status_unchecked: return "sec_status_unchecked";
case sec_status_bogus: return "sec_status_bogus";
case sec_status_indeterminate: return "sec_status_indeterminate";
case sec_status_insecure: return "sec_status_insecure";
case sec_status_secure_sentinel_fail: return "sec_status_secure_sentinel_fail";
case sec_status_secure: return "sec_status_secure";
}
return "unknown_sec_status_value";
}
void log_rrset_key(enum verbosity_value v, const char* str,
struct ub_packed_rrset_key* rrset)
{
if(verbosity >= v)
log_nametypeclass(v, str, rrset->rk.dname,
ntohs(rrset->rk.type), ntohs(rrset->rk.rrset_class));
}
int packed_rr_to_string(struct ub_packed_rrset_key* rrset, size_t i,
time_t now, char* dest, size_t dest_len)
{
struct packed_rrset_data* d = (struct packed_rrset_data*)rrset->
entry.data;
uint8_t rr[65535];
size_t wlen;
size_t rlen = rrset->rk.dname_len + 2 + 2 + 4 + d->rr_len[i];
time_t adjust = 0;
log_assert(dest_len > 0 && dest);
if(rlen > dest_len) {
dest[0] = 0;
return 0;
}
memmove(rr, rrset->rk.dname, rrset->rk.dname_len);
if(i < d->count)
memmove(rr+rrset->rk.dname_len, &rrset->rk.type, 2);
else sldns_write_uint16(rr+rrset->rk.dname_len, LDNS_RR_TYPE_RRSIG);
memmove(rr+rrset->rk.dname_len+2, &rrset->rk.rrset_class, 2);
adjust = SERVE_ORIGINAL_TTL ? d->ttl_add : now;
if (d->rr_ttl[i] < adjust) adjust = d->rr_ttl[i]; /* Prevent negative TTL overflow */
sldns_write_uint32(rr+rrset->rk.dname_len+4,
(uint32_t)(d->rr_ttl[i]-adjust));
memmove(rr+rrset->rk.dname_len+8, d->rr_data[i], d->rr_len[i]);
wlen = (size_t)sldns_wire2str_rr_buf(rr, rlen, dest, dest_len);
if(wlen >= dest_len) {
/* the output string was truncated */
log_info("rrbuf failure %d %s", (int)d->rr_len[i], dest);
dest[0] = 0;
return 0;
}
return 1;
}
void log_packed_rrset(enum verbosity_value v, const char* str,
struct ub_packed_rrset_key* rrset)
{
struct packed_rrset_data* d = (struct packed_rrset_data*)rrset->
entry.data;
char buf[65535];
size_t i;
if(verbosity < v)
return;
for(i=0; i<d->count+d->rrsig_count; i++) {
if(!packed_rr_to_string(rrset, i, 0, buf, sizeof(buf))) {
log_info("%s: rr %d wire2str-error", str, (int)i);
} else {
log_info("%s: %s", str, buf);
}
}
}
time_t
ub_packed_rrset_ttl(struct ub_packed_rrset_key* key)
{
struct packed_rrset_data* d = (struct packed_rrset_data*)key->
entry.data;
return d->ttl;
}
struct ub_packed_rrset_key*
packed_rrset_copy_region(struct ub_packed_rrset_key* key,
struct regional* region, time_t now)
{
struct ub_packed_rrset_key* ck = regional_alloc(region,
sizeof(struct ub_packed_rrset_key));
struct packed_rrset_data* d;
struct packed_rrset_data* data = (struct packed_rrset_data*)
key->entry.data;
size_t dsize, i;
time_t adjust = 0;
if(!ck)
return NULL;
ck->id = key->id;
memset(&ck->entry, 0, sizeof(ck->entry));
ck->entry.hash = key->entry.hash;
ck->entry.key = ck;
ck->rk = key->rk;
ck->rk.dname = regional_alloc_init(region, key->rk.dname,
key->rk.dname_len);
if(!ck->rk.dname)
return NULL;
dsize = packed_rrset_sizeof(data);
d = (struct packed_rrset_data*)regional_alloc_init(region, data, dsize);
if(!d)
return NULL;
ck->entry.data = d;
packed_rrset_ptr_fixup(d);
/* make TTLs relative - once per rrset */
adjust = SERVE_ORIGINAL_TTL ? data->ttl_add : now;
for(i=0; i<d->count + d->rrsig_count; i++) {
if(d->rr_ttl[i] < adjust)
d->rr_ttl[i] = SERVE_EXPIRED?SERVE_EXPIRED_REPLY_TTL:0;
else d->rr_ttl[i] -= adjust;
}
if(d->ttl < adjust)
d->ttl = SERVE_EXPIRED?SERVE_EXPIRED_REPLY_TTL:0;
else d->ttl -= adjust;
d->ttl_add = 0; /* TTLs have been made relative */
return ck;
}
struct ub_packed_rrset_key*
packed_rrset_copy_alloc(struct ub_packed_rrset_key* key,
struct alloc_cache* alloc, time_t now)
{
struct packed_rrset_data* fd, *dd;
struct ub_packed_rrset_key* dk = alloc_special_obtain(alloc);
if(!dk) return NULL;
fd = (struct packed_rrset_data*)key->entry.data;
dk->entry.hash = key->entry.hash;
dk->rk = key->rk;
dk->rk.dname = (uint8_t*)memdup(key->rk.dname, key->rk.dname_len);
if(!dk->rk.dname) {
alloc_special_release(alloc, dk);
return NULL;
}
dd = (struct packed_rrset_data*)memdup(fd, packed_rrset_sizeof(fd));
if(!dd) {
free(dk->rk.dname);
alloc_special_release(alloc, dk);
return NULL;
}
packed_rrset_ptr_fixup(dd);
dk->entry.data = (void*)dd;
packed_rrset_ttl_add(dd, now);
return dk;
}
int
packed_rrset_find_rr(struct packed_rrset_data* d, uint8_t* rdata, size_t len,
size_t* index)
{
size_t i;
for(i=0; i<d->count; i++) {
if(d->rr_len[i] != len)
continue;
if(memcmp(d->rr_data[i], rdata, len) == 0) {
*index = i;
return 1;
}
}
return 0;
}