901 lines
24 KiB
C
901 lines
24 KiB
C
/*
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* daemon/cachedump.c - dump the cache to text format.
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*
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* Copyright (c) 2008, NLnet Labs. All rights reserved.
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*
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* This software is open source.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* Neither the name of the NLNET LABS nor the names of its contributors may
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* be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* \file
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*
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* This file contains functions to read and write the cache(s)
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* to text format.
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*/
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#include "config.h"
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#include <openssl/ssl.h>
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#include "daemon/cachedump.h"
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#include "daemon/remote.h"
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#include "daemon/worker.h"
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#include "services/cache/rrset.h"
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#include "services/cache/dns.h"
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#include "services/cache/infra.h"
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#include "util/data/msgreply.h"
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#include "util/regional.h"
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#include "util/net_help.h"
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#include "util/data/dname.h"
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#include "iterator/iterator.h"
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#include "iterator/iter_delegpt.h"
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#include "iterator/iter_utils.h"
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#include "iterator/iter_fwd.h"
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#include "iterator/iter_hints.h"
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#include "sldns/sbuffer.h"
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#include "sldns/wire2str.h"
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#include "sldns/str2wire.h"
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/** dump one rrset zonefile line */
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static int
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dump_rrset_line(RES* ssl, struct ub_packed_rrset_key* k, time_t now, size_t i)
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{
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char s[65535];
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if(!packed_rr_to_string(k, i, now, s, sizeof(s))) {
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return ssl_printf(ssl, "BADRR\n");
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}
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return ssl_printf(ssl, "%s", s);
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}
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/** dump rrset key and data info */
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static int
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dump_rrset(RES* ssl, struct ub_packed_rrset_key* k,
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struct packed_rrset_data* d, time_t now)
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{
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size_t i;
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/* rd lock held by caller */
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if(!k || !d) return 1;
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if(k->id == 0) return 1; /* deleted */
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if(d->ttl < now) return 1; /* expired */
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/* meta line */
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if(!ssl_printf(ssl, ";rrset%s " ARG_LL "d %u %u %d %d\n",
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(k->rk.flags & PACKED_RRSET_NSEC_AT_APEX)?" nsec_apex":"",
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(long long)(d->ttl - now),
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(unsigned)d->count, (unsigned)d->rrsig_count,
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(int)d->trust, (int)d->security
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))
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return 0;
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for(i=0; i<d->count + d->rrsig_count; i++) {
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if(!dump_rrset_line(ssl, k, now, i))
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return 0;
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}
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return 1;
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}
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/** dump lruhash rrset cache */
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static int
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dump_rrset_lruhash(RES* ssl, struct lruhash* h, time_t now)
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{
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struct lruhash_entry* e;
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/* lruhash already locked by caller */
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/* walk in order of lru; best first */
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for(e=h->lru_start; e; e = e->lru_next) {
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lock_rw_rdlock(&e->lock);
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if(!dump_rrset(ssl, (struct ub_packed_rrset_key*)e->key,
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(struct packed_rrset_data*)e->data, now)) {
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lock_rw_unlock(&e->lock);
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return 0;
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}
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lock_rw_unlock(&e->lock);
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}
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return 1;
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}
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/** dump rrset cache */
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static int
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dump_rrset_cache(RES* ssl, struct worker* worker)
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{
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struct rrset_cache* r = worker->env.rrset_cache;
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size_t slab;
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if(!ssl_printf(ssl, "START_RRSET_CACHE\n")) return 0;
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for(slab=0; slab<r->table.size; slab++) {
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lock_quick_lock(&r->table.array[slab]->lock);
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if(!dump_rrset_lruhash(ssl, r->table.array[slab],
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*worker->env.now)) {
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lock_quick_unlock(&r->table.array[slab]->lock);
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return 0;
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}
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lock_quick_unlock(&r->table.array[slab]->lock);
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}
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return ssl_printf(ssl, "END_RRSET_CACHE\n");
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}
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/** dump message to rrset reference */
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static int
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dump_msg_ref(RES* ssl, struct ub_packed_rrset_key* k)
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{
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char* nm, *tp, *cl;
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nm = sldns_wire2str_dname(k->rk.dname, k->rk.dname_len);
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tp = sldns_wire2str_type(ntohs(k->rk.type));
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cl = sldns_wire2str_class(ntohs(k->rk.rrset_class));
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if(!nm || !cl || !tp) {
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free(nm);
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free(tp);
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free(cl);
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return ssl_printf(ssl, "BADREF\n");
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}
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if(!ssl_printf(ssl, "%s %s %s %d\n", nm, cl, tp, (int)k->rk.flags)) {
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free(nm);
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free(tp);
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free(cl);
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return 0;
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}
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free(nm);
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free(tp);
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free(cl);
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return 1;
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}
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/** dump message entry */
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static int
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dump_msg(RES* ssl, struct query_info* k, struct reply_info* d,
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time_t now)
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{
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size_t i;
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char* nm, *tp, *cl;
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if(!k || !d) return 1;
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if(d->ttl < now) return 1; /* expired */
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nm = sldns_wire2str_dname(k->qname, k->qname_len);
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tp = sldns_wire2str_type(k->qtype);
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cl = sldns_wire2str_class(k->qclass);
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if(!nm || !tp || !cl) {
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free(nm);
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free(tp);
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free(cl);
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return 1; /* skip this entry */
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}
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if(!rrset_array_lock(d->ref, d->rrset_count, now)) {
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/* rrsets have timed out or do not exist */
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free(nm);
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free(tp);
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free(cl);
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return 1; /* skip this entry */
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}
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/* meta line */
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if(!ssl_printf(ssl, "msg %s %s %s %d %d " ARG_LL "d %d %u %u %u\n",
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nm, cl, tp,
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(int)d->flags, (int)d->qdcount,
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(long long)(d->ttl-now), (int)d->security,
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(unsigned)d->an_numrrsets,
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(unsigned)d->ns_numrrsets,
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(unsigned)d->ar_numrrsets)) {
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free(nm);
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free(tp);
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free(cl);
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rrset_array_unlock(d->ref, d->rrset_count);
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return 0;
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}
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free(nm);
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free(tp);
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free(cl);
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for(i=0; i<d->rrset_count; i++) {
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if(!dump_msg_ref(ssl, d->rrsets[i])) {
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rrset_array_unlock(d->ref, d->rrset_count);
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return 0;
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}
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}
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rrset_array_unlock(d->ref, d->rrset_count);
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return 1;
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}
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/** copy msg to worker pad */
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static int
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copy_msg(struct regional* region, struct lruhash_entry* e,
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struct query_info** k, struct reply_info** d)
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{
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struct reply_info* rep = (struct reply_info*)e->data;
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if(rep->rrset_count > RR_COUNT_MAX)
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return 0; /* to protect against integer overflow */
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*d = (struct reply_info*)regional_alloc_init(region, e->data,
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sizeof(struct reply_info) +
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sizeof(struct rrset_ref) * (rep->rrset_count-1) +
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sizeof(struct ub_packed_rrset_key*) * rep->rrset_count);
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if(!*d)
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return 0;
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(*d)->rrsets = (struct ub_packed_rrset_key**)(void *)(
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(uint8_t*)(&((*d)->ref[0])) +
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sizeof(struct rrset_ref) * rep->rrset_count);
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*k = (struct query_info*)regional_alloc_init(region,
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e->key, sizeof(struct query_info));
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if(!*k)
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return 0;
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(*k)->qname = regional_alloc_init(region,
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(*k)->qname, (*k)->qname_len);
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return (*k)->qname != NULL;
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}
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/** dump lruhash msg cache */
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static int
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dump_msg_lruhash(RES* ssl, struct worker* worker, struct lruhash* h)
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{
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struct lruhash_entry* e;
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struct query_info* k;
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struct reply_info* d;
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/* lruhash already locked by caller */
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/* walk in order of lru; best first */
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for(e=h->lru_start; e; e = e->lru_next) {
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regional_free_all(worker->scratchpad);
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lock_rw_rdlock(&e->lock);
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/* make copy of rrset in worker buffer */
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if(!copy_msg(worker->scratchpad, e, &k, &d)) {
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lock_rw_unlock(&e->lock);
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return 0;
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}
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lock_rw_unlock(&e->lock);
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/* release lock so we can lookup the rrset references
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* in the rrset cache */
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if(!dump_msg(ssl, k, d, *worker->env.now)) {
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return 0;
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}
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}
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return 1;
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}
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/** dump msg cache */
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static int
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dump_msg_cache(RES* ssl, struct worker* worker)
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{
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struct slabhash* sh = worker->env.msg_cache;
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size_t slab;
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if(!ssl_printf(ssl, "START_MSG_CACHE\n")) return 0;
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for(slab=0; slab<sh->size; slab++) {
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lock_quick_lock(&sh->array[slab]->lock);
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if(!dump_msg_lruhash(ssl, worker, sh->array[slab])) {
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lock_quick_unlock(&sh->array[slab]->lock);
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return 0;
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}
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lock_quick_unlock(&sh->array[slab]->lock);
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}
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return ssl_printf(ssl, "END_MSG_CACHE\n");
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}
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int
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dump_cache(RES* ssl, struct worker* worker)
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{
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if(!dump_rrset_cache(ssl, worker))
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return 0;
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if(!dump_msg_cache(ssl, worker))
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return 0;
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return ssl_printf(ssl, "EOF\n");
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}
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/** read a line from ssl into buffer */
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static int
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ssl_read_buf(RES* ssl, sldns_buffer* buf)
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{
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return ssl_read_line(ssl, (char*)sldns_buffer_begin(buf),
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sldns_buffer_capacity(buf));
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}
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/** check fixed text on line */
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static int
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read_fixed(RES* ssl, sldns_buffer* buf, const char* str)
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{
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if(!ssl_read_buf(ssl, buf)) return 0;
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return (strcmp((char*)sldns_buffer_begin(buf), str) == 0);
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}
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/** load an RR into rrset */
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static int
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load_rr(RES* ssl, sldns_buffer* buf, struct regional* region,
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struct ub_packed_rrset_key* rk, struct packed_rrset_data* d,
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unsigned int i, int is_rrsig, int* go_on, time_t now)
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{
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uint8_t rr[LDNS_RR_BUF_SIZE];
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size_t rr_len = sizeof(rr), dname_len = 0;
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int status;
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/* read the line */
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if(!ssl_read_buf(ssl, buf))
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return 0;
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if(strncmp((char*)sldns_buffer_begin(buf), "BADRR\n", 6) == 0) {
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*go_on = 0;
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return 1;
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}
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status = sldns_str2wire_rr_buf((char*)sldns_buffer_begin(buf), rr,
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&rr_len, &dname_len, 3600, NULL, 0, NULL, 0);
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if(status != 0) {
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log_warn("error cannot parse rr: %s: %s",
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sldns_get_errorstr_parse(status),
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(char*)sldns_buffer_begin(buf));
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return 0;
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}
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if(is_rrsig && sldns_wirerr_get_type(rr, rr_len, dname_len)
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!= LDNS_RR_TYPE_RRSIG) {
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log_warn("error expected rrsig but got %s",
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(char*)sldns_buffer_begin(buf));
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return 0;
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}
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/* convert ldns rr into packed_rr */
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d->rr_ttl[i] = (time_t)sldns_wirerr_get_ttl(rr, rr_len, dname_len) + now;
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sldns_buffer_clear(buf);
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d->rr_len[i] = sldns_wirerr_get_rdatalen(rr, rr_len, dname_len)+2;
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d->rr_data[i] = (uint8_t*)regional_alloc_init(region,
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sldns_wirerr_get_rdatawl(rr, rr_len, dname_len), d->rr_len[i]);
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if(!d->rr_data[i]) {
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log_warn("error out of memory");
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return 0;
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}
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/* if first entry, fill the key structure */
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if(i==0) {
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rk->rk.type = htons(sldns_wirerr_get_type(rr, rr_len, dname_len));
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rk->rk.rrset_class = htons(sldns_wirerr_get_class(rr, rr_len, dname_len));
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rk->rk.dname_len = dname_len;
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rk->rk.dname = regional_alloc_init(region, rr, dname_len);
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if(!rk->rk.dname) {
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log_warn("error out of memory");
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return 0;
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}
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}
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return 1;
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}
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/** move entry into cache */
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static int
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move_into_cache(struct ub_packed_rrset_key* k,
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struct packed_rrset_data* d, struct worker* worker)
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{
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struct ub_packed_rrset_key* ak;
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struct packed_rrset_data* ad;
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size_t s, i, num = d->count + d->rrsig_count;
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struct rrset_ref ref;
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uint8_t* p;
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ak = alloc_special_obtain(&worker->alloc);
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if(!ak) {
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log_warn("error out of memory");
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return 0;
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}
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ak->entry.data = NULL;
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ak->rk = k->rk;
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ak->entry.hash = rrset_key_hash(&k->rk);
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ak->rk.dname = (uint8_t*)memdup(k->rk.dname, k->rk.dname_len);
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if(!ak->rk.dname) {
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log_warn("error out of memory");
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ub_packed_rrset_parsedelete(ak, &worker->alloc);
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return 0;
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}
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s = sizeof(*ad) + (sizeof(size_t) + sizeof(uint8_t*) +
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sizeof(time_t))* num;
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for(i=0; i<num; i++)
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s += d->rr_len[i];
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ad = (struct packed_rrset_data*)malloc(s);
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if(!ad) {
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log_warn("error out of memory");
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ub_packed_rrset_parsedelete(ak, &worker->alloc);
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return 0;
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}
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p = (uint8_t*)ad;
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memmove(p, d, sizeof(*ad));
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p += sizeof(*ad);
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memmove(p, &d->rr_len[0], sizeof(size_t)*num);
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p += sizeof(size_t)*num;
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memmove(p, &d->rr_data[0], sizeof(uint8_t*)*num);
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p += sizeof(uint8_t*)*num;
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memmove(p, &d->rr_ttl[0], sizeof(time_t)*num);
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p += sizeof(time_t)*num;
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for(i=0; i<num; i++) {
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memmove(p, d->rr_data[i], d->rr_len[i]);
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p += d->rr_len[i];
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}
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packed_rrset_ptr_fixup(ad);
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ak->entry.data = ad;
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ref.key = ak;
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ref.id = ak->id;
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(void)rrset_cache_update(worker->env.rrset_cache, &ref,
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&worker->alloc, *worker->env.now);
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return 1;
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}
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/** load an rrset entry */
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static int
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load_rrset(RES* ssl, sldns_buffer* buf, struct worker* worker)
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{
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char* s = (char*)sldns_buffer_begin(buf);
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struct regional* region = worker->scratchpad;
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struct ub_packed_rrset_key* rk;
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struct packed_rrset_data* d;
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unsigned int rr_count, rrsig_count, trust, security;
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long long ttl;
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unsigned int i;
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int go_on = 1;
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regional_free_all(region);
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rk = (struct ub_packed_rrset_key*)regional_alloc_zero(region,
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sizeof(*rk));
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d = (struct packed_rrset_data*)regional_alloc_zero(region, sizeof(*d));
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if(!rk || !d) {
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log_warn("error out of memory");
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return 0;
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}
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if(strncmp(s, ";rrset", 6) != 0) {
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log_warn("error expected ';rrset' but got %s", s);
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return 0;
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}
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s += 6;
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if(strncmp(s, " nsec_apex", 10) == 0) {
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s += 10;
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rk->rk.flags |= PACKED_RRSET_NSEC_AT_APEX;
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}
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if(sscanf(s, " " ARG_LL "d %u %u %u %u", &ttl, &rr_count, &rrsig_count,
|
|
&trust, &security) != 5) {
|
|
log_warn("error bad rrset spec %s", s);
|
|
return 0;
|
|
}
|
|
if(rr_count == 0 && rrsig_count == 0) {
|
|
log_warn("bad rrset without contents");
|
|
return 0;
|
|
}
|
|
if(rr_count > RR_COUNT_MAX || rrsig_count > RR_COUNT_MAX) {
|
|
log_warn("bad rrset with too many rrs");
|
|
return 0;
|
|
}
|
|
d->count = (size_t)rr_count;
|
|
d->rrsig_count = (size_t)rrsig_count;
|
|
d->security = (enum sec_status)security;
|
|
d->trust = (enum rrset_trust)trust;
|
|
d->ttl = (time_t)ttl + *worker->env.now;
|
|
|
|
d->rr_len = regional_alloc_zero(region,
|
|
sizeof(size_t)*(d->count+d->rrsig_count));
|
|
d->rr_ttl = regional_alloc_zero(region,
|
|
sizeof(time_t)*(d->count+d->rrsig_count));
|
|
d->rr_data = regional_alloc_zero(region,
|
|
sizeof(uint8_t*)*(d->count+d->rrsig_count));
|
|
if(!d->rr_len || !d->rr_ttl || !d->rr_data) {
|
|
log_warn("error out of memory");
|
|
return 0;
|
|
}
|
|
|
|
/* read the rr's themselves */
|
|
for(i=0; i<rr_count; i++) {
|
|
if(!load_rr(ssl, buf, region, rk, d, i, 0,
|
|
&go_on, *worker->env.now)) {
|
|
log_warn("could not read rr %u", i);
|
|
return 0;
|
|
}
|
|
}
|
|
for(i=0; i<rrsig_count; i++) {
|
|
if(!load_rr(ssl, buf, region, rk, d, i+rr_count, 1,
|
|
&go_on, *worker->env.now)) {
|
|
log_warn("could not read rrsig %u", i);
|
|
return 0;
|
|
}
|
|
}
|
|
if(!go_on) {
|
|
/* skip this entry */
|
|
return 1;
|
|
}
|
|
|
|
return move_into_cache(rk, d, worker);
|
|
}
|
|
|
|
/** load rrset cache */
|
|
static int
|
|
load_rrset_cache(RES* ssl, struct worker* worker)
|
|
{
|
|
sldns_buffer* buf = worker->env.scratch_buffer;
|
|
if(!read_fixed(ssl, buf, "START_RRSET_CACHE")) return 0;
|
|
while(ssl_read_buf(ssl, buf) &&
|
|
strcmp((char*)sldns_buffer_begin(buf), "END_RRSET_CACHE")!=0) {
|
|
if(!load_rrset(ssl, buf, worker))
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/** read qinfo from next three words */
|
|
static char*
|
|
load_qinfo(char* str, struct query_info* qinfo, struct regional* region)
|
|
{
|
|
/* s is part of the buf */
|
|
char* s = str;
|
|
uint8_t rr[LDNS_RR_BUF_SIZE];
|
|
size_t rr_len = sizeof(rr), dname_len = 0;
|
|
int status;
|
|
|
|
/* skip three words */
|
|
s = strchr(str, ' ');
|
|
if(s) s = strchr(s+1, ' ');
|
|
if(s) s = strchr(s+1, ' ');
|
|
if(!s) {
|
|
log_warn("error line too short, %s", str);
|
|
return NULL;
|
|
}
|
|
s[0] = 0;
|
|
s++;
|
|
|
|
/* parse them */
|
|
status = sldns_str2wire_rr_question_buf(str, rr, &rr_len, &dname_len,
|
|
NULL, 0, NULL, 0);
|
|
if(status != 0) {
|
|
log_warn("error cannot parse: %s %s",
|
|
sldns_get_errorstr_parse(status), str);
|
|
return NULL;
|
|
}
|
|
qinfo->qtype = sldns_wirerr_get_type(rr, rr_len, dname_len);
|
|
qinfo->qclass = sldns_wirerr_get_class(rr, rr_len, dname_len);
|
|
qinfo->qname_len = dname_len;
|
|
qinfo->qname = (uint8_t*)regional_alloc_init(region, rr, dname_len);
|
|
qinfo->local_alias = NULL;
|
|
if(!qinfo->qname) {
|
|
log_warn("error out of memory");
|
|
return NULL;
|
|
}
|
|
|
|
return s;
|
|
}
|
|
|
|
/** load a msg rrset reference */
|
|
static int
|
|
load_ref(RES* ssl, sldns_buffer* buf, struct worker* worker,
|
|
struct regional *region, struct ub_packed_rrset_key** rrset,
|
|
int* go_on)
|
|
{
|
|
char* s = (char*)sldns_buffer_begin(buf);
|
|
struct query_info qinfo;
|
|
unsigned int flags;
|
|
struct ub_packed_rrset_key* k;
|
|
|
|
/* read line */
|
|
if(!ssl_read_buf(ssl, buf))
|
|
return 0;
|
|
if(strncmp(s, "BADREF", 6) == 0) {
|
|
*go_on = 0; /* its bad, skip it and skip message */
|
|
return 1;
|
|
}
|
|
|
|
s = load_qinfo(s, &qinfo, region);
|
|
if(!s) {
|
|
return 0;
|
|
}
|
|
if(sscanf(s, " %u", &flags) != 1) {
|
|
log_warn("error cannot parse flags: %s", s);
|
|
return 0;
|
|
}
|
|
|
|
/* lookup in cache */
|
|
k = rrset_cache_lookup(worker->env.rrset_cache, qinfo.qname,
|
|
qinfo.qname_len, qinfo.qtype, qinfo.qclass,
|
|
(uint32_t)flags, *worker->env.now, 0);
|
|
if(!k) {
|
|
/* not found or expired */
|
|
*go_on = 0;
|
|
return 1;
|
|
}
|
|
|
|
/* store in result */
|
|
*rrset = packed_rrset_copy_region(k, region, *worker->env.now);
|
|
lock_rw_unlock(&k->entry.lock);
|
|
|
|
return (*rrset != NULL);
|
|
}
|
|
|
|
/** load a msg entry */
|
|
static int
|
|
load_msg(RES* ssl, sldns_buffer* buf, struct worker* worker)
|
|
{
|
|
struct regional* region = worker->scratchpad;
|
|
struct query_info qinf;
|
|
struct reply_info rep;
|
|
char* s = (char*)sldns_buffer_begin(buf);
|
|
unsigned int flags, qdcount, security, an, ns, ar;
|
|
long long ttl;
|
|
size_t i;
|
|
int go_on = 1;
|
|
|
|
regional_free_all(region);
|
|
|
|
if(strncmp(s, "msg ", 4) != 0) {
|
|
log_warn("error expected msg but got %s", s);
|
|
return 0;
|
|
}
|
|
s += 4;
|
|
s = load_qinfo(s, &qinf, region);
|
|
if(!s) {
|
|
return 0;
|
|
}
|
|
|
|
/* read remainder of line */
|
|
if(sscanf(s, " %u %u " ARG_LL "d %u %u %u %u", &flags, &qdcount, &ttl,
|
|
&security, &an, &ns, &ar) != 7) {
|
|
log_warn("error cannot parse numbers: %s", s);
|
|
return 0;
|
|
}
|
|
rep.flags = (uint16_t)flags;
|
|
rep.qdcount = (uint16_t)qdcount;
|
|
rep.ttl = (time_t)ttl;
|
|
rep.prefetch_ttl = PREFETCH_TTL_CALC(rep.ttl);
|
|
rep.serve_expired_ttl = rep.ttl + SERVE_EXPIRED_TTL;
|
|
rep.security = (enum sec_status)security;
|
|
if(an > RR_COUNT_MAX || ns > RR_COUNT_MAX || ar > RR_COUNT_MAX) {
|
|
log_warn("error too many rrsets");
|
|
return 0; /* protect against integer overflow in alloc */
|
|
}
|
|
rep.an_numrrsets = (size_t)an;
|
|
rep.ns_numrrsets = (size_t)ns;
|
|
rep.ar_numrrsets = (size_t)ar;
|
|
rep.rrset_count = (size_t)an+(size_t)ns+(size_t)ar;
|
|
rep.rrsets = (struct ub_packed_rrset_key**)regional_alloc_zero(
|
|
region, sizeof(struct ub_packed_rrset_key*)*rep.rrset_count);
|
|
|
|
/* fill repinfo with references */
|
|
for(i=0; i<rep.rrset_count; i++) {
|
|
if(!load_ref(ssl, buf, worker, region, &rep.rrsets[i],
|
|
&go_on)) {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
if(!go_on)
|
|
return 1; /* skip this one, not all references satisfied */
|
|
|
|
if(!dns_cache_store(&worker->env, &qinf, &rep, 0, 0, 0, NULL, flags)) {
|
|
log_warn("error out of memory");
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/** load msg cache */
|
|
static int
|
|
load_msg_cache(RES* ssl, struct worker* worker)
|
|
{
|
|
sldns_buffer* buf = worker->env.scratch_buffer;
|
|
if(!read_fixed(ssl, buf, "START_MSG_CACHE")) return 0;
|
|
while(ssl_read_buf(ssl, buf) &&
|
|
strcmp((char*)sldns_buffer_begin(buf), "END_MSG_CACHE")!=0) {
|
|
if(!load_msg(ssl, buf, worker))
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
int
|
|
load_cache(RES* ssl, struct worker* worker)
|
|
{
|
|
if(!load_rrset_cache(ssl, worker))
|
|
return 0;
|
|
if(!load_msg_cache(ssl, worker))
|
|
return 0;
|
|
return read_fixed(ssl, worker->env.scratch_buffer, "EOF");
|
|
}
|
|
|
|
/** print details on a delegation point */
|
|
static void
|
|
print_dp_details(RES* ssl, struct worker* worker, struct delegpt* dp)
|
|
{
|
|
char buf[257];
|
|
struct delegpt_addr* a;
|
|
int lame, dlame, rlame, rto, edns_vs, to, delay,
|
|
tA = 0, tAAAA = 0, tother = 0;
|
|
long long entry_ttl;
|
|
struct rtt_info ri;
|
|
uint8_t edns_lame_known;
|
|
for(a = dp->target_list; a; a = a->next_target) {
|
|
addr_to_str(&a->addr, a->addrlen, buf, sizeof(buf));
|
|
if(!ssl_printf(ssl, "%-16s\t", buf))
|
|
return;
|
|
if(a->bogus) {
|
|
if(!ssl_printf(ssl, "Address is BOGUS. "))
|
|
return;
|
|
}
|
|
/* lookup in infra cache */
|
|
delay=0;
|
|
entry_ttl = infra_get_host_rto(worker->env.infra_cache,
|
|
&a->addr, a->addrlen, dp->name, dp->namelen,
|
|
&ri, &delay, *worker->env.now, &tA, &tAAAA, &tother);
|
|
if(entry_ttl == -2 && ri.rto >= USEFUL_SERVER_TOP_TIMEOUT) {
|
|
if(!ssl_printf(ssl, "expired, rto %d msec, tA %d "
|
|
"tAAAA %d tother %d.\n", ri.rto, tA, tAAAA,
|
|
tother))
|
|
return;
|
|
continue;
|
|
}
|
|
if(entry_ttl == -1 || entry_ttl == -2) {
|
|
if(!ssl_printf(ssl, "not in infra cache.\n"))
|
|
return;
|
|
continue; /* skip stuff not in infra cache */
|
|
}
|
|
|
|
/* uses type_A because most often looked up, but other
|
|
* lameness won't be reported then */
|
|
if(!infra_get_lame_rtt(worker->env.infra_cache,
|
|
&a->addr, a->addrlen, dp->name, dp->namelen,
|
|
LDNS_RR_TYPE_A, &lame, &dlame, &rlame, &rto,
|
|
*worker->env.now)) {
|
|
if(!ssl_printf(ssl, "not in infra cache.\n"))
|
|
return;
|
|
continue; /* skip stuff not in infra cache */
|
|
}
|
|
if(!ssl_printf(ssl, "%s%s%s%srto %d msec, ttl " ARG_LL "d, "
|
|
"ping %d var %d rtt %d, tA %d, tAAAA %d, tother %d",
|
|
lame?"LAME ":"", dlame?"NoDNSSEC ":"",
|
|
a->lame?"AddrWasParentSide ":"",
|
|
rlame?"NoAuthButRecursive ":"", rto, entry_ttl,
|
|
ri.srtt, ri.rttvar, rtt_notimeout(&ri),
|
|
tA, tAAAA, tother))
|
|
return;
|
|
if(delay)
|
|
if(!ssl_printf(ssl, ", probedelay %d", delay))
|
|
return;
|
|
if(infra_host(worker->env.infra_cache, &a->addr, a->addrlen,
|
|
dp->name, dp->namelen, *worker->env.now, &edns_vs,
|
|
&edns_lame_known, &to)) {
|
|
if(edns_vs == -1) {
|
|
if(!ssl_printf(ssl, ", noEDNS%s.",
|
|
edns_lame_known?" probed":" assumed"))
|
|
return;
|
|
} else {
|
|
if(!ssl_printf(ssl, ", EDNS %d%s.", edns_vs,
|
|
edns_lame_known?" probed":" assumed"))
|
|
return;
|
|
}
|
|
}
|
|
if(!ssl_printf(ssl, "\n"))
|
|
return;
|
|
}
|
|
}
|
|
|
|
/** print main dp info */
|
|
static void
|
|
print_dp_main(RES* ssl, struct delegpt* dp, struct dns_msg* msg)
|
|
{
|
|
size_t i, n_ns, n_miss, n_addr, n_res, n_avail;
|
|
|
|
/* print the dp */
|
|
if(msg)
|
|
for(i=0; i<msg->rep->rrset_count; i++) {
|
|
struct ub_packed_rrset_key* k = msg->rep->rrsets[i];
|
|
struct packed_rrset_data* d =
|
|
(struct packed_rrset_data*)k->entry.data;
|
|
if(d->security == sec_status_bogus) {
|
|
if(!ssl_printf(ssl, "Address is BOGUS:\n"))
|
|
return;
|
|
}
|
|
if(!dump_rrset(ssl, k, d, 0))
|
|
return;
|
|
}
|
|
delegpt_count_ns(dp, &n_ns, &n_miss);
|
|
delegpt_count_addr(dp, &n_addr, &n_res, &n_avail);
|
|
/* since dp has not been used by iterator, all are available*/
|
|
if(!ssl_printf(ssl, "Delegation with %d names, of which %d "
|
|
"can be examined to query further addresses.\n"
|
|
"%sIt provides %d IP addresses.\n",
|
|
(int)n_ns, (int)n_miss, (dp->bogus?"It is BOGUS. ":""),
|
|
(int)n_addr))
|
|
return;
|
|
}
|
|
|
|
int print_deleg_lookup(RES* ssl, struct worker* worker, uint8_t* nm,
|
|
size_t nmlen, int ATTR_UNUSED(nmlabs))
|
|
{
|
|
/* deep links into the iterator module */
|
|
struct delegpt* dp;
|
|
struct dns_msg* msg;
|
|
struct regional* region = worker->scratchpad;
|
|
char b[260];
|
|
struct query_info qinfo;
|
|
struct iter_hints_stub* stub;
|
|
regional_free_all(region);
|
|
qinfo.qname = nm;
|
|
qinfo.qname_len = nmlen;
|
|
qinfo.qtype = LDNS_RR_TYPE_A;
|
|
qinfo.qclass = LDNS_RR_CLASS_IN;
|
|
qinfo.local_alias = NULL;
|
|
|
|
dname_str(nm, b);
|
|
if(!ssl_printf(ssl, "The following name servers are used for lookup "
|
|
"of %s\n", b))
|
|
return 0;
|
|
|
|
dp = forwards_lookup(worker->env.fwds, nm, qinfo.qclass);
|
|
if(dp) {
|
|
if(!ssl_printf(ssl, "forwarding request:\n"))
|
|
return 0;
|
|
print_dp_main(ssl, dp, NULL);
|
|
print_dp_details(ssl, worker, dp);
|
|
return 1;
|
|
}
|
|
|
|
while(1) {
|
|
dp = dns_cache_find_delegation(&worker->env, nm, nmlen,
|
|
qinfo.qtype, qinfo.qclass, region, &msg,
|
|
*worker->env.now);
|
|
if(!dp) {
|
|
return ssl_printf(ssl, "no delegation from "
|
|
"cache; goes to configured roots\n");
|
|
}
|
|
/* go up? */
|
|
if(iter_dp_is_useless(&qinfo, BIT_RD, dp)) {
|
|
print_dp_main(ssl, dp, msg);
|
|
print_dp_details(ssl, worker, dp);
|
|
if(!ssl_printf(ssl, "cache delegation was "
|
|
"useless (no IP addresses)\n"))
|
|
return 0;
|
|
if(dname_is_root(nm)) {
|
|
/* goes to root config */
|
|
return ssl_printf(ssl, "no delegation from "
|
|
"cache; goes to configured roots\n");
|
|
} else {
|
|
/* useless, goes up */
|
|
nm = dp->name;
|
|
nmlen = dp->namelen;
|
|
dname_remove_label(&nm, &nmlen);
|
|
dname_str(nm, b);
|
|
if(!ssl_printf(ssl, "going up, lookup %s\n", b))
|
|
return 0;
|
|
continue;
|
|
}
|
|
}
|
|
stub = hints_lookup_stub(worker->env.hints, nm, qinfo.qclass,
|
|
dp);
|
|
if(stub) {
|
|
if(stub->noprime) {
|
|
if(!ssl_printf(ssl, "The noprime stub servers "
|
|
"are used:\n"))
|
|
return 0;
|
|
} else {
|
|
if(!ssl_printf(ssl, "The stub is primed "
|
|
"with servers:\n"))
|
|
return 0;
|
|
}
|
|
print_dp_main(ssl, stub->dp, NULL);
|
|
print_dp_details(ssl, worker, stub->dp);
|
|
} else {
|
|
print_dp_main(ssl, dp, msg);
|
|
print_dp_details(ssl, worker, dp);
|
|
}
|
|
break;
|
|
}
|
|
|
|
return 1;
|
|
}
|