Reapply643f9a0581
.64d318ea98
was a mismerge during fake rebase. Let's reapply it. Changes include: Added ACL per interface, proxy protocol and bug fixes. Announcement: https://nlnetlabs.nl/news/2022/Oct/13/unbound-1.17.0-released/ Merge commit '643f9a0581e8aac7eb790ced1164748939829826' into main
2186 lines
64 KiB
C
2186 lines
64 KiB
C
/*
|
|
* services/localzone.c - local zones authority service.
|
|
*
|
|
* 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 functions to enable local zone authority service.
|
|
*/
|
|
#include "config.h"
|
|
#include "services/localzone.h"
|
|
#include "sldns/str2wire.h"
|
|
#include "util/regional.h"
|
|
#include "util/config_file.h"
|
|
#include "util/data/dname.h"
|
|
#include "util/data/packed_rrset.h"
|
|
#include "util/data/msgencode.h"
|
|
#include "util/net_help.h"
|
|
#include "util/netevent.h"
|
|
#include "util/data/msgreply.h"
|
|
#include "util/data/msgparse.h"
|
|
#include "util/as112.h"
|
|
|
|
/* maximum RRs in an RRset, to cap possible 'endless' list RRs.
|
|
* with 16 bytes for an A record, a 64K packet has about 4000 max */
|
|
#define LOCALZONE_RRSET_COUNT_MAX 4096
|
|
|
|
/** print all RRsets in local zone */
|
|
static void
|
|
local_zone_out(struct local_zone* z)
|
|
{
|
|
struct local_data* d;
|
|
struct local_rrset* p;
|
|
RBTREE_FOR(d, struct local_data*, &z->data) {
|
|
for(p = d->rrsets; p; p = p->next) {
|
|
log_nametypeclass(NO_VERBOSE, "rrset", d->name,
|
|
ntohs(p->rrset->rk.type),
|
|
ntohs(p->rrset->rk.rrset_class));
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
local_zone_print(struct local_zone* z)
|
|
{
|
|
char buf[64];
|
|
lock_rw_rdlock(&z->lock);
|
|
snprintf(buf, sizeof(buf), "%s zone",
|
|
local_zone_type2str(z->type));
|
|
log_nametypeclass(NO_VERBOSE, buf, z->name, 0, z->dclass);
|
|
local_zone_out(z);
|
|
lock_rw_unlock(&z->lock);
|
|
}
|
|
|
|
void local_zones_print(struct local_zones* zones)
|
|
{
|
|
struct local_zone* z;
|
|
lock_rw_rdlock(&zones->lock);
|
|
log_info("number of auth zones %u", (unsigned)zones->ztree.count);
|
|
RBTREE_FOR(z, struct local_zone*, &zones->ztree) {
|
|
local_zone_print(z);
|
|
}
|
|
lock_rw_unlock(&zones->lock);
|
|
}
|
|
|
|
struct local_zones*
|
|
local_zones_create(void)
|
|
{
|
|
struct local_zones* zones = (struct local_zones*)calloc(1,
|
|
sizeof(*zones));
|
|
if(!zones)
|
|
return NULL;
|
|
rbtree_init(&zones->ztree, &local_zone_cmp);
|
|
lock_rw_init(&zones->lock);
|
|
lock_protect(&zones->lock, &zones->ztree, sizeof(zones->ztree));
|
|
/* also lock protects the rbnode's in struct local_zone */
|
|
return zones;
|
|
}
|
|
|
|
/** helper traverse to delete zones */
|
|
static void
|
|
lzdel(rbnode_type* n, void* ATTR_UNUSED(arg))
|
|
{
|
|
struct local_zone* z = (struct local_zone*)n->key;
|
|
local_zone_delete(z);
|
|
}
|
|
|
|
void
|
|
local_zones_delete(struct local_zones* zones)
|
|
{
|
|
if(!zones)
|
|
return;
|
|
lock_rw_destroy(&zones->lock);
|
|
/* walk through zones and delete them all */
|
|
traverse_postorder(&zones->ztree, lzdel, NULL);
|
|
free(zones);
|
|
}
|
|
|
|
void
|
|
local_zone_delete(struct local_zone* z)
|
|
{
|
|
if(!z)
|
|
return;
|
|
lock_rw_destroy(&z->lock);
|
|
regional_destroy(z->region);
|
|
free(z->name);
|
|
free(z->taglist);
|
|
free(z);
|
|
}
|
|
|
|
int
|
|
local_zone_cmp(const void* z1, const void* z2)
|
|
{
|
|
/* first sort on class, so that hierarchy can be maintained within
|
|
* a class */
|
|
struct local_zone* a = (struct local_zone*)z1;
|
|
struct local_zone* b = (struct local_zone*)z2;
|
|
int m;
|
|
if(a->dclass != b->dclass) {
|
|
if(a->dclass < b->dclass)
|
|
return -1;
|
|
return 1;
|
|
}
|
|
return dname_lab_cmp(a->name, a->namelabs, b->name, b->namelabs, &m);
|
|
}
|
|
|
|
int
|
|
local_data_cmp(const void* d1, const void* d2)
|
|
{
|
|
struct local_data* a = (struct local_data*)d1;
|
|
struct local_data* b = (struct local_data*)d2;
|
|
int m;
|
|
return dname_canon_lab_cmp(a->name, a->namelabs, b->name,
|
|
b->namelabs, &m);
|
|
}
|
|
|
|
/* form wireformat from text format domain name */
|
|
int
|
|
parse_dname(const char* str, uint8_t** res, size_t* len, int* labs)
|
|
{
|
|
*res = sldns_str2wire_dname(str, len);
|
|
*labs = 0;
|
|
if(!*res) {
|
|
log_err("cannot parse name %s", str);
|
|
return 0;
|
|
}
|
|
*labs = dname_count_size_labels(*res, len);
|
|
return 1;
|
|
}
|
|
|
|
/** create a new localzone */
|
|
static struct local_zone*
|
|
local_zone_create(uint8_t* nm, size_t len, int labs,
|
|
enum localzone_type t, uint16_t dclass)
|
|
{
|
|
struct local_zone* z = (struct local_zone*)calloc(1, sizeof(*z));
|
|
if(!z) {
|
|
return NULL;
|
|
}
|
|
z->node.key = z;
|
|
z->dclass = dclass;
|
|
z->type = t;
|
|
z->name = nm;
|
|
z->namelen = len;
|
|
z->namelabs = labs;
|
|
lock_rw_init(&z->lock);
|
|
z->region = regional_create_nochunk(sizeof(struct regional));
|
|
if(!z->region) {
|
|
free(z);
|
|
return NULL;
|
|
}
|
|
rbtree_init(&z->data, &local_data_cmp);
|
|
lock_protect(&z->lock, &z->parent, sizeof(*z)-sizeof(rbnode_type));
|
|
/* also the zones->lock protects node, parent, name*, class */
|
|
return z;
|
|
}
|
|
|
|
/** enter a new zone with allocated dname returns with WRlock */
|
|
static struct local_zone*
|
|
lz_enter_zone_dname(struct local_zones* zones, uint8_t* nm, size_t len,
|
|
int labs, enum localzone_type t, uint16_t c)
|
|
{
|
|
struct local_zone* z = local_zone_create(nm, len, labs, t, c);
|
|
if(!z) {
|
|
free(nm);
|
|
log_err("out of memory");
|
|
return NULL;
|
|
}
|
|
|
|
/* add to rbtree */
|
|
lock_rw_wrlock(&zones->lock);
|
|
lock_rw_wrlock(&z->lock);
|
|
if(!rbtree_insert(&zones->ztree, &z->node)) {
|
|
struct local_zone* oldz;
|
|
char str[256];
|
|
dname_str(nm, str);
|
|
log_warn("duplicate local-zone %s", str);
|
|
lock_rw_unlock(&z->lock);
|
|
/* save zone name locally before deallocation,
|
|
* otherwise, nm is gone if we zone_delete now. */
|
|
oldz = z;
|
|
/* find the correct zone, so not an error for duplicate */
|
|
z = local_zones_find(zones, nm, len, labs, c);
|
|
lock_rw_wrlock(&z->lock);
|
|
lock_rw_unlock(&zones->lock);
|
|
local_zone_delete(oldz);
|
|
return z;
|
|
}
|
|
lock_rw_unlock(&zones->lock);
|
|
return z;
|
|
}
|
|
|
|
/** enter a new zone */
|
|
static struct local_zone*
|
|
lz_enter_zone(struct local_zones* zones, const char* name, const char* type,
|
|
uint16_t dclass)
|
|
{
|
|
struct local_zone* z;
|
|
enum localzone_type t;
|
|
uint8_t* nm;
|
|
size_t len;
|
|
int labs;
|
|
if(!parse_dname(name, &nm, &len, &labs)) {
|
|
log_err("bad zone name %s %s", name, type);
|
|
return NULL;
|
|
}
|
|
if(!local_zone_str2type(type, &t)) {
|
|
log_err("bad lz_enter_zone type %s %s", name, type);
|
|
free(nm);
|
|
return NULL;
|
|
}
|
|
if(!(z=lz_enter_zone_dname(zones, nm, len, labs, t, dclass))) {
|
|
log_err("could not enter zone %s %s", name, type);
|
|
return NULL;
|
|
}
|
|
return z;
|
|
}
|
|
|
|
int
|
|
rrstr_get_rr_content(const char* str, uint8_t** nm, uint16_t* type,
|
|
uint16_t* dclass, time_t* ttl, uint8_t* rr, size_t len,
|
|
uint8_t** rdata, size_t* rdata_len)
|
|
{
|
|
size_t dname_len = 0;
|
|
int e = sldns_str2wire_rr_buf(str, rr, &len, &dname_len, 3600,
|
|
NULL, 0, NULL, 0);
|
|
if(e) {
|
|
log_err("error parsing local-data at %d: '%s': %s",
|
|
LDNS_WIREPARSE_OFFSET(e), str,
|
|
sldns_get_errorstr_parse(e));
|
|
return 0;
|
|
}
|
|
*nm = memdup(rr, dname_len);
|
|
if(!*nm) {
|
|
log_err("out of memory");
|
|
return 0;
|
|
}
|
|
*dclass = sldns_wirerr_get_class(rr, len, dname_len);
|
|
*type = sldns_wirerr_get_type(rr, len, dname_len);
|
|
*ttl = (time_t)sldns_wirerr_get_ttl(rr, len, dname_len);
|
|
*rdata = sldns_wirerr_get_rdatawl(rr, len, dname_len);
|
|
*rdata_len = sldns_wirerr_get_rdatalen(rr, len, dname_len)+2;
|
|
return 1;
|
|
}
|
|
|
|
/** return name and class of rr; parses string */
|
|
static int
|
|
get_rr_nameclass(const char* str, uint8_t** nm, uint16_t* dclass,
|
|
uint16_t* dtype)
|
|
{
|
|
uint8_t rr[LDNS_RR_BUF_SIZE];
|
|
size_t len = sizeof(rr), dname_len = 0;
|
|
int s = sldns_str2wire_rr_buf(str, rr, &len, &dname_len, 3600,
|
|
NULL, 0, NULL, 0);
|
|
if(s != 0) {
|
|
log_err("error parsing local-data at %d '%s': %s",
|
|
LDNS_WIREPARSE_OFFSET(s), str,
|
|
sldns_get_errorstr_parse(s));
|
|
return 0;
|
|
}
|
|
*nm = memdup(rr, dname_len);
|
|
*dclass = sldns_wirerr_get_class(rr, len, dname_len);
|
|
*dtype = sldns_wirerr_get_type(rr, len, dname_len);
|
|
if(!*nm) {
|
|
log_err("out of memory");
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/**
|
|
* Find an rrset in local data structure.
|
|
* @param data: local data domain name structure.
|
|
* @param type: type to look for (host order).
|
|
* @param alias_ok: 1 if matching a non-exact, alias type such as CNAME is
|
|
* allowed. otherwise 0.
|
|
* @return rrset pointer or NULL if not found.
|
|
*/
|
|
static struct local_rrset*
|
|
local_data_find_type(struct local_data* data, uint16_t type, int alias_ok)
|
|
{
|
|
struct local_rrset* p;
|
|
type = htons(type);
|
|
for(p = data->rrsets; p; p = p->next) {
|
|
if(p->rrset->rk.type == type)
|
|
return p;
|
|
if(alias_ok && p->rrset->rk.type == htons(LDNS_RR_TYPE_CNAME))
|
|
return p;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/** check for RR duplicates */
|
|
static int
|
|
rr_is_duplicate(struct packed_rrset_data* pd, uint8_t* rdata, size_t rdata_len)
|
|
{
|
|
size_t i;
|
|
for(i=0; i<pd->count; i++) {
|
|
if(pd->rr_len[i] == rdata_len &&
|
|
memcmp(pd->rr_data[i], rdata, rdata_len) == 0)
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/** new local_rrset */
|
|
static struct local_rrset*
|
|
new_local_rrset(struct regional* region, struct local_data* node,
|
|
uint16_t rrtype, uint16_t rrclass)
|
|
{
|
|
struct packed_rrset_data* pd;
|
|
struct local_rrset* rrset = (struct local_rrset*)
|
|
regional_alloc_zero(region, sizeof(*rrset));
|
|
if(!rrset) {
|
|
log_err("out of memory");
|
|
return NULL;
|
|
}
|
|
rrset->next = node->rrsets;
|
|
node->rrsets = rrset;
|
|
rrset->rrset = (struct ub_packed_rrset_key*)
|
|
regional_alloc_zero(region, sizeof(*rrset->rrset));
|
|
if(!rrset->rrset) {
|
|
log_err("out of memory");
|
|
return NULL;
|
|
}
|
|
rrset->rrset->entry.key = rrset->rrset;
|
|
pd = (struct packed_rrset_data*)regional_alloc_zero(region,
|
|
sizeof(*pd));
|
|
if(!pd) {
|
|
log_err("out of memory");
|
|
return NULL;
|
|
}
|
|
pd->trust = rrset_trust_prim_noglue;
|
|
pd->security = sec_status_insecure;
|
|
rrset->rrset->entry.data = pd;
|
|
rrset->rrset->rk.dname = node->name;
|
|
rrset->rrset->rk.dname_len = node->namelen;
|
|
rrset->rrset->rk.type = htons(rrtype);
|
|
rrset->rrset->rk.rrset_class = htons(rrclass);
|
|
return rrset;
|
|
}
|
|
|
|
/** insert RR into RRset data structure; Wastes a couple of bytes */
|
|
int
|
|
rrset_insert_rr(struct regional* region, struct packed_rrset_data* pd,
|
|
uint8_t* rdata, size_t rdata_len, time_t ttl, const char* rrstr)
|
|
{
|
|
size_t* oldlen = pd->rr_len;
|
|
time_t* oldttl = pd->rr_ttl;
|
|
uint8_t** olddata = pd->rr_data;
|
|
|
|
/* add RR to rrset */
|
|
if(pd->count > LOCALZONE_RRSET_COUNT_MAX) {
|
|
log_warn("RRset '%s' has more than %d records, record ignored",
|
|
rrstr, LOCALZONE_RRSET_COUNT_MAX);
|
|
return 1;
|
|
}
|
|
pd->count++;
|
|
pd->rr_len = regional_alloc(region, sizeof(*pd->rr_len)*pd->count);
|
|
pd->rr_ttl = regional_alloc(region, sizeof(*pd->rr_ttl)*pd->count);
|
|
pd->rr_data = regional_alloc(region, sizeof(*pd->rr_data)*pd->count);
|
|
if(!pd->rr_len || !pd->rr_ttl || !pd->rr_data) {
|
|
log_err("out of memory");
|
|
return 0;
|
|
}
|
|
if(pd->count > 1) {
|
|
memcpy(pd->rr_len+1, oldlen,
|
|
sizeof(*pd->rr_len)*(pd->count-1));
|
|
memcpy(pd->rr_ttl+1, oldttl,
|
|
sizeof(*pd->rr_ttl)*(pd->count-1));
|
|
memcpy(pd->rr_data+1, olddata,
|
|
sizeof(*pd->rr_data)*(pd->count-1));
|
|
}
|
|
pd->rr_len[0] = rdata_len;
|
|
pd->rr_ttl[0] = ttl;
|
|
pd->rr_data[0] = regional_alloc_init(region, rdata, rdata_len);
|
|
if(!pd->rr_data[0]) {
|
|
log_err("out of memory");
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/** Delete RR from local-zone RRset, wastes memory as the deleted RRs cannot be
|
|
* free'd (regionally alloc'd) */
|
|
int
|
|
local_rrset_remove_rr(struct packed_rrset_data* pd, size_t index)
|
|
{
|
|
log_assert(pd->count > 0);
|
|
if(index >= pd->count) {
|
|
log_warn("Trying to remove RR with out of bound index");
|
|
return 0;
|
|
}
|
|
if(index + 1 < pd->count) {
|
|
/* not removing last element */
|
|
size_t nexti = index + 1;
|
|
size_t num = pd->count - nexti;
|
|
memmove(pd->rr_len+index, pd->rr_len+nexti, sizeof(*pd->rr_len)*num);
|
|
memmove(pd->rr_ttl+index, pd->rr_ttl+nexti, sizeof(*pd->rr_ttl)*num);
|
|
memmove(pd->rr_data+index, pd->rr_data+nexti, sizeof(*pd->rr_data)*num);
|
|
}
|
|
pd->count--;
|
|
return 1;
|
|
}
|
|
|
|
struct local_data*
|
|
local_zone_find_data(struct local_zone* z, uint8_t* nm, size_t nmlen, int nmlabs)
|
|
{
|
|
struct local_data key;
|
|
key.node.key = &key;
|
|
key.name = nm;
|
|
key.namelen = nmlen;
|
|
key.namelabs = nmlabs;
|
|
return (struct local_data*)rbtree_search(&z->data, &key.node);
|
|
}
|
|
|
|
/** find a node, create it if not and all its empty nonterminal parents */
|
|
static int
|
|
lz_find_create_node(struct local_zone* z, uint8_t* nm, size_t nmlen,
|
|
int nmlabs, struct local_data** res)
|
|
{
|
|
struct local_data* ld = local_zone_find_data(z, nm, nmlen, nmlabs);
|
|
if(!ld) {
|
|
/* create a domain name to store rr. */
|
|
ld = (struct local_data*)regional_alloc_zero(z->region,
|
|
sizeof(*ld));
|
|
if(!ld) {
|
|
log_err("out of memory adding local data");
|
|
return 0;
|
|
}
|
|
ld->node.key = ld;
|
|
ld->name = regional_alloc_init(z->region, nm, nmlen);
|
|
if(!ld->name) {
|
|
log_err("out of memory");
|
|
return 0;
|
|
}
|
|
ld->namelen = nmlen;
|
|
ld->namelabs = nmlabs;
|
|
if(!rbtree_insert(&z->data, &ld->node)) {
|
|
log_assert(0); /* duplicate name */
|
|
}
|
|
/* see if empty nonterminals need to be created */
|
|
if(nmlabs > z->namelabs) {
|
|
dname_remove_label(&nm, &nmlen);
|
|
if(!lz_find_create_node(z, nm, nmlen, nmlabs-1, res))
|
|
return 0;
|
|
}
|
|
}
|
|
*res = ld;
|
|
return 1;
|
|
}
|
|
|
|
/* Mark the SOA record for the zone. This only marks the SOA rrset; the data
|
|
* for the RR is entered later on local_zone_enter_rr() as with the other
|
|
* records. An artificial soa_negative record with a modified TTL (minimum of
|
|
* the TTL and the SOA.MINIMUM) is also created and marked for usage with
|
|
* negative answers and to avoid allocations during those answers. */
|
|
static int
|
|
lz_mark_soa_for_zone(struct local_zone* z, struct ub_packed_rrset_key* soa_rrset,
|
|
uint8_t* rdata, size_t rdata_len, time_t ttl, const char* rrstr)
|
|
{
|
|
struct packed_rrset_data* pd = (struct packed_rrset_data*)
|
|
regional_alloc_zero(z->region, sizeof(*pd));
|
|
struct ub_packed_rrset_key* rrset_negative = (struct ub_packed_rrset_key*)
|
|
regional_alloc_zero(z->region, sizeof(*rrset_negative));
|
|
time_t minimum;
|
|
if(!rrset_negative||!pd) {
|
|
log_err("out of memory");
|
|
return 0;
|
|
}
|
|
/* Mark the original SOA record and then continue with the negative one. */
|
|
z->soa = soa_rrset;
|
|
rrset_negative->entry.key = rrset_negative;
|
|
pd->trust = rrset_trust_prim_noglue;
|
|
pd->security = sec_status_insecure;
|
|
rrset_negative->entry.data = pd;
|
|
rrset_negative->rk.dname = soa_rrset->rk.dname;
|
|
rrset_negative->rk.dname_len = soa_rrset->rk.dname_len;
|
|
rrset_negative->rk.type = soa_rrset->rk.type;
|
|
rrset_negative->rk.rrset_class = soa_rrset->rk.rrset_class;
|
|
if(!rrset_insert_rr(z->region, pd, rdata, rdata_len, ttl, rrstr))
|
|
return 0;
|
|
/* last 4 bytes are minimum ttl in network format */
|
|
if(pd->count == 0 || pd->rr_len[0] < 2+4)
|
|
return 0;
|
|
minimum = (time_t)sldns_read_uint32(pd->rr_data[0]+(pd->rr_len[0]-4));
|
|
minimum = ttl<minimum?ttl:minimum;
|
|
pd->ttl = minimum;
|
|
pd->rr_ttl[0] = minimum;
|
|
|
|
z->soa_negative = rrset_negative;
|
|
return 1;
|
|
}
|
|
|
|
int
|
|
local_zone_enter_rr(struct local_zone* z, uint8_t* nm, size_t nmlen,
|
|
int nmlabs, uint16_t rrtype, uint16_t rrclass, time_t ttl,
|
|
uint8_t* rdata, size_t rdata_len, const char* rrstr)
|
|
{
|
|
struct local_data* node;
|
|
struct local_rrset* rrset;
|
|
struct packed_rrset_data* pd;
|
|
|
|
if(!lz_find_create_node(z, nm, nmlen, nmlabs, &node)) {
|
|
return 0;
|
|
}
|
|
log_assert(node);
|
|
|
|
/* Reject it if we would end up having CNAME and other data (including
|
|
* another CNAME) for a redirect zone. */
|
|
if((z->type == local_zone_redirect ||
|
|
z->type == local_zone_inform_redirect) && node->rrsets) {
|
|
const char* othertype = NULL;
|
|
if (rrtype == LDNS_RR_TYPE_CNAME)
|
|
othertype = "other";
|
|
else if (node->rrsets->rrset->rk.type ==
|
|
htons(LDNS_RR_TYPE_CNAME)) {
|
|
othertype = "CNAME";
|
|
}
|
|
if(othertype) {
|
|
log_err("local-data '%s' in redirect zone must not "
|
|
"coexist with %s local-data", rrstr, othertype);
|
|
return 0;
|
|
}
|
|
}
|
|
rrset = local_data_find_type(node, rrtype, 0);
|
|
if(!rrset) {
|
|
rrset = new_local_rrset(z->region, node, rrtype, rrclass);
|
|
if(!rrset)
|
|
return 0;
|
|
if(query_dname_compare(node->name, z->name) == 0) {
|
|
if(rrtype == LDNS_RR_TYPE_NSEC)
|
|
rrset->rrset->rk.flags = PACKED_RRSET_NSEC_AT_APEX;
|
|
if(rrtype == LDNS_RR_TYPE_SOA &&
|
|
!lz_mark_soa_for_zone(z, rrset->rrset, rdata, rdata_len, ttl,
|
|
rrstr))
|
|
return 0;
|
|
}
|
|
}
|
|
pd = (struct packed_rrset_data*)rrset->rrset->entry.data;
|
|
log_assert(rrset && pd);
|
|
|
|
/* check for duplicate RR */
|
|
if(rr_is_duplicate(pd, rdata, rdata_len)) {
|
|
verbose(VERB_ALGO, "ignoring duplicate RR: %s", rrstr);
|
|
return 1;
|
|
}
|
|
return rrset_insert_rr(z->region, pd, rdata, rdata_len, ttl, rrstr);
|
|
}
|
|
|
|
/** enter data RR into auth zone */
|
|
static int
|
|
lz_enter_rr_into_zone(struct local_zone* z, const char* rrstr)
|
|
{
|
|
uint8_t* nm;
|
|
size_t nmlen;
|
|
int nmlabs, ret;
|
|
uint16_t rrtype = 0, rrclass = 0;
|
|
time_t ttl = 0;
|
|
uint8_t rr[LDNS_RR_BUF_SIZE];
|
|
uint8_t* rdata;
|
|
size_t rdata_len;
|
|
if(!rrstr_get_rr_content(rrstr, &nm, &rrtype, &rrclass, &ttl, rr,
|
|
sizeof(rr), &rdata, &rdata_len)) {
|
|
log_err("bad local-data: %s", rrstr);
|
|
return 0;
|
|
}
|
|
log_assert(z->dclass == rrclass);
|
|
if((z->type == local_zone_redirect ||
|
|
z->type == local_zone_inform_redirect) &&
|
|
query_dname_compare(z->name, nm) != 0) {
|
|
log_err("local-data in redirect zone must reside at top of zone"
|
|
", not at %s", rrstr);
|
|
free(nm);
|
|
return 0;
|
|
}
|
|
nmlabs = dname_count_size_labels(nm, &nmlen);
|
|
ret = local_zone_enter_rr(z, nm, nmlen, nmlabs, rrtype, rrclass, ttl,
|
|
rdata, rdata_len, rrstr);
|
|
free(nm);
|
|
return ret;
|
|
}
|
|
|
|
/** enter a data RR into auth data; a zone for it must exist */
|
|
static int
|
|
lz_enter_rr_str(struct local_zones* zones, const char* rr)
|
|
{
|
|
uint8_t* rr_name;
|
|
uint16_t rr_class, rr_type;
|
|
size_t len;
|
|
int labs;
|
|
struct local_zone* z;
|
|
int r;
|
|
if(!get_rr_nameclass(rr, &rr_name, &rr_class, &rr_type)) {
|
|
log_err("bad rr %s", rr);
|
|
return 0;
|
|
}
|
|
labs = dname_count_size_labels(rr_name, &len);
|
|
lock_rw_rdlock(&zones->lock);
|
|
z = local_zones_lookup(zones, rr_name, len, labs, rr_class, rr_type);
|
|
if(!z) {
|
|
lock_rw_unlock(&zones->lock);
|
|
fatal_exit("internal error: no zone for rr %s", rr);
|
|
}
|
|
lock_rw_wrlock(&z->lock);
|
|
lock_rw_unlock(&zones->lock);
|
|
free(rr_name);
|
|
r = lz_enter_rr_into_zone(z, rr);
|
|
lock_rw_unlock(&z->lock);
|
|
return r;
|
|
}
|
|
|
|
/** enter tagstring into zone */
|
|
static int
|
|
lz_enter_zone_tag(struct local_zones* zones, char* zname, uint8_t* list,
|
|
size_t len, uint16_t rr_class)
|
|
{
|
|
uint8_t dname[LDNS_MAX_DOMAINLEN+1];
|
|
size_t dname_len = sizeof(dname);
|
|
int dname_labs, r = 0;
|
|
struct local_zone* z;
|
|
|
|
if(sldns_str2wire_dname_buf(zname, dname, &dname_len) != 0) {
|
|
log_err("cannot parse zone name in local-zone-tag: %s", zname);
|
|
return 0;
|
|
}
|
|
dname_labs = dname_count_labels(dname);
|
|
|
|
lock_rw_rdlock(&zones->lock);
|
|
z = local_zones_find(zones, dname, dname_len, dname_labs, rr_class);
|
|
if(!z) {
|
|
lock_rw_unlock(&zones->lock);
|
|
log_err("no local-zone for tag %s", zname);
|
|
return 0;
|
|
}
|
|
lock_rw_wrlock(&z->lock);
|
|
lock_rw_unlock(&zones->lock);
|
|
free(z->taglist);
|
|
z->taglist = memdup(list, len);
|
|
z->taglen = len;
|
|
if(z->taglist)
|
|
r = 1;
|
|
lock_rw_unlock(&z->lock);
|
|
return r;
|
|
}
|
|
|
|
/** enter override into zone */
|
|
static int
|
|
lz_enter_override(struct local_zones* zones, char* zname, char* netblock,
|
|
char* type, uint16_t rr_class)
|
|
{
|
|
uint8_t dname[LDNS_MAX_DOMAINLEN+1];
|
|
size_t dname_len = sizeof(dname);
|
|
int dname_labs;
|
|
struct sockaddr_storage addr;
|
|
int net;
|
|
socklen_t addrlen;
|
|
struct local_zone* z;
|
|
enum localzone_type t;
|
|
|
|
/* parse zone name */
|
|
if(sldns_str2wire_dname_buf(zname, dname, &dname_len) != 0) {
|
|
log_err("cannot parse zone name in local-zone-override: %s %s",
|
|
zname, netblock);
|
|
return 0;
|
|
}
|
|
dname_labs = dname_count_labels(dname);
|
|
|
|
/* parse netblock */
|
|
if(!netblockstrtoaddr(netblock, UNBOUND_DNS_PORT, &addr, &addrlen,
|
|
&net)) {
|
|
log_err("cannot parse netblock in local-zone-override: %s %s",
|
|
zname, netblock);
|
|
return 0;
|
|
}
|
|
|
|
/* parse zone type */
|
|
if(!local_zone_str2type(type, &t)) {
|
|
log_err("cannot parse type in local-zone-override: %s %s %s",
|
|
zname, netblock, type);
|
|
return 0;
|
|
}
|
|
|
|
/* find localzone entry */
|
|
lock_rw_rdlock(&zones->lock);
|
|
z = local_zones_find(zones, dname, dname_len, dname_labs, rr_class);
|
|
if(!z) {
|
|
lock_rw_unlock(&zones->lock);
|
|
log_err("no local-zone for local-zone-override %s", zname);
|
|
return 0;
|
|
}
|
|
lock_rw_wrlock(&z->lock);
|
|
lock_rw_unlock(&zones->lock);
|
|
|
|
/* create netblock addr_tree if not present yet */
|
|
if(!z->override_tree) {
|
|
z->override_tree = (struct rbtree_type*)regional_alloc_zero(
|
|
z->region, sizeof(*z->override_tree));
|
|
if(!z->override_tree) {
|
|
lock_rw_unlock(&z->lock);
|
|
log_err("out of memory");
|
|
return 0;
|
|
}
|
|
addr_tree_init(z->override_tree);
|
|
}
|
|
/* add new elem to tree */
|
|
if(z->override_tree) {
|
|
struct local_zone_override* n;
|
|
n = (struct local_zone_override*)regional_alloc_zero(
|
|
z->region, sizeof(*n));
|
|
if(!n) {
|
|
lock_rw_unlock(&z->lock);
|
|
log_err("out of memory");
|
|
return 0;
|
|
}
|
|
n->type = t;
|
|
if(!addr_tree_insert(z->override_tree,
|
|
(struct addr_tree_node*)n, &addr, addrlen, net)) {
|
|
lock_rw_unlock(&z->lock);
|
|
log_err("duplicate local-zone-override %s %s",
|
|
zname, netblock);
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
lock_rw_unlock(&z->lock);
|
|
return 1;
|
|
}
|
|
|
|
/** parse local-zone: statements */
|
|
static int
|
|
lz_enter_zones(struct local_zones* zones, struct config_file* cfg)
|
|
{
|
|
struct config_str2list* p;
|
|
#ifndef THREADS_DISABLED
|
|
struct local_zone* z;
|
|
#endif
|
|
for(p = cfg->local_zones; p; p = p->next) {
|
|
if(!(
|
|
#ifndef THREADS_DISABLED
|
|
z=
|
|
#endif
|
|
lz_enter_zone(zones, p->str, p->str2,
|
|
LDNS_RR_CLASS_IN)))
|
|
return 0;
|
|
lock_rw_unlock(&z->lock);
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/** lookup a zone in rbtree; exact match only; SLOW due to parse */
|
|
static int
|
|
lz_exists(struct local_zones* zones, const char* name)
|
|
{
|
|
struct local_zone z;
|
|
z.node.key = &z;
|
|
z.dclass = LDNS_RR_CLASS_IN;
|
|
if(!parse_dname(name, &z.name, &z.namelen, &z.namelabs)) {
|
|
log_err("bad name %s", name);
|
|
return 0;
|
|
}
|
|
lock_rw_rdlock(&zones->lock);
|
|
if(rbtree_search(&zones->ztree, &z.node)) {
|
|
lock_rw_unlock(&zones->lock);
|
|
free(z.name);
|
|
return 1;
|
|
}
|
|
lock_rw_unlock(&zones->lock);
|
|
free(z.name);
|
|
return 0;
|
|
}
|
|
|
|
/** lookup a zone in cfg->nodefault list */
|
|
static int
|
|
lz_nodefault(struct config_file* cfg, const char* name)
|
|
{
|
|
struct config_strlist* p;
|
|
size_t len = strlen(name);
|
|
if(len == 0) return 0;
|
|
if(name[len-1] == '.') len--;
|
|
|
|
for(p = cfg->local_zones_nodefault; p; p = p->next) {
|
|
/* compare zone name, lowercase, compare without ending . */
|
|
if(strncasecmp(p->str, name, len) == 0 &&
|
|
(strlen(p->str) == len || (strlen(p->str)==len+1 &&
|
|
p->str[len] == '.')))
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/** enter (AS112) empty default zone */
|
|
static int
|
|
add_empty_default(struct local_zones* zones, struct config_file* cfg,
|
|
const char* name)
|
|
{
|
|
struct local_zone* z;
|
|
char str[1024]; /* known long enough */
|
|
if(lz_exists(zones, name) || lz_nodefault(cfg, name))
|
|
return 1; /* do not enter default content */
|
|
if(!(z=lz_enter_zone(zones, name, "static", LDNS_RR_CLASS_IN)))
|
|
return 0;
|
|
snprintf(str, sizeof(str), "%s 10800 IN SOA localhost. "
|
|
"nobody.invalid. 1 3600 1200 604800 10800", name);
|
|
if(!lz_enter_rr_into_zone(z, str)) {
|
|
lock_rw_unlock(&z->lock);
|
|
return 0;
|
|
}
|
|
snprintf(str, sizeof(str), "%s 10800 IN NS localhost. ", name);
|
|
if(!lz_enter_rr_into_zone(z, str)) {
|
|
lock_rw_unlock(&z->lock);
|
|
return 0;
|
|
}
|
|
lock_rw_unlock(&z->lock);
|
|
return 1;
|
|
}
|
|
|
|
/** enter default zones */
|
|
int local_zone_enter_defaults(struct local_zones* zones, struct config_file* cfg)
|
|
{
|
|
struct local_zone* z;
|
|
const char** zstr;
|
|
|
|
/* Do not add any default */
|
|
if(cfg->local_zones_disable_default)
|
|
return 1;
|
|
|
|
/* this list of zones is from RFC 6303 and RFC 7686 */
|
|
|
|
/* block localhost level zones first, then onion and later the LAN zones */
|
|
|
|
/* localhost. zone */
|
|
if(!lz_exists(zones, "localhost.") &&
|
|
!lz_nodefault(cfg, "localhost.")) {
|
|
if(!(z=lz_enter_zone(zones, "localhost.", "redirect",
|
|
LDNS_RR_CLASS_IN)) ||
|
|
!lz_enter_rr_into_zone(z,
|
|
"localhost. 10800 IN NS localhost.") ||
|
|
!lz_enter_rr_into_zone(z,
|
|
"localhost. 10800 IN SOA localhost. nobody.invalid. "
|
|
"1 3600 1200 604800 10800") ||
|
|
!lz_enter_rr_into_zone(z,
|
|
"localhost. 10800 IN A 127.0.0.1") ||
|
|
!lz_enter_rr_into_zone(z,
|
|
"localhost. 10800 IN AAAA ::1")) {
|
|
log_err("out of memory adding default zone");
|
|
if(z) { lock_rw_unlock(&z->lock); }
|
|
return 0;
|
|
}
|
|
lock_rw_unlock(&z->lock);
|
|
}
|
|
/* reverse ip4 zone */
|
|
if(!lz_exists(zones, "127.in-addr.arpa.") &&
|
|
!lz_nodefault(cfg, "127.in-addr.arpa.")) {
|
|
if(!(z=lz_enter_zone(zones, "127.in-addr.arpa.", "static",
|
|
LDNS_RR_CLASS_IN)) ||
|
|
!lz_enter_rr_into_zone(z,
|
|
"127.in-addr.arpa. 10800 IN NS localhost.") ||
|
|
!lz_enter_rr_into_zone(z,
|
|
"127.in-addr.arpa. 10800 IN SOA localhost. "
|
|
"nobody.invalid. 1 3600 1200 604800 10800") ||
|
|
!lz_enter_rr_into_zone(z,
|
|
"1.0.0.127.in-addr.arpa. 10800 IN PTR localhost.")) {
|
|
log_err("out of memory adding default zone");
|
|
if(z) { lock_rw_unlock(&z->lock); }
|
|
return 0;
|
|
}
|
|
lock_rw_unlock(&z->lock);
|
|
}
|
|
/* reverse ip6 zone */
|
|
if(!lz_exists(zones, "1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa.") &&
|
|
!lz_nodefault(cfg, "1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa.")) {
|
|
if(!(z=lz_enter_zone(zones, "1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa.", "static",
|
|
LDNS_RR_CLASS_IN)) ||
|
|
!lz_enter_rr_into_zone(z,
|
|
"1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa. 10800 IN NS localhost.") ||
|
|
!lz_enter_rr_into_zone(z,
|
|
"1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa. 10800 IN SOA localhost. "
|
|
"nobody.invalid. 1 3600 1200 604800 10800") ||
|
|
!lz_enter_rr_into_zone(z,
|
|
"1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa. 10800 IN PTR localhost.")) {
|
|
log_err("out of memory adding default zone");
|
|
if(z) { lock_rw_unlock(&z->lock); }
|
|
return 0;
|
|
}
|
|
lock_rw_unlock(&z->lock);
|
|
}
|
|
/* home.arpa. zone (RFC 8375) */
|
|
if(!add_empty_default(zones, cfg, "home.arpa.")) {
|
|
log_err("out of memory adding default zone");
|
|
return 0;
|
|
}
|
|
/* onion. zone (RFC 7686) */
|
|
if(!add_empty_default(zones, cfg, "onion.")) {
|
|
log_err("out of memory adding default zone");
|
|
return 0;
|
|
}
|
|
/* test. zone (RFC 6761) */
|
|
if(!add_empty_default(zones, cfg, "test.")) {
|
|
log_err("out of memory adding default zone");
|
|
return 0;
|
|
}
|
|
/* invalid. zone (RFC 6761) */
|
|
if(!add_empty_default(zones, cfg, "invalid.")) {
|
|
log_err("out of memory adding default zone");
|
|
return 0;
|
|
}
|
|
/* block AS112 zones, unless asked not to */
|
|
if(!cfg->unblock_lan_zones) {
|
|
for(zstr = as112_zones; *zstr; zstr++) {
|
|
if(!add_empty_default(zones, cfg, *zstr)) {
|
|
log_err("out of memory adding default zone");
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/** parse local-zone-override: statements */
|
|
static int
|
|
lz_enter_overrides(struct local_zones* zones, struct config_file* cfg)
|
|
{
|
|
struct config_str3list* p;
|
|
for(p = cfg->local_zone_overrides; p; p = p->next) {
|
|
if(!lz_enter_override(zones, p->str, p->str2, p->str3,
|
|
LDNS_RR_CLASS_IN))
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/** setup parent pointers, so that a lookup can be done for closest match */
|
|
static void
|
|
init_parents(struct local_zones* zones)
|
|
{
|
|
struct local_zone* node, *prev = NULL, *p;
|
|
int m;
|
|
lock_rw_wrlock(&zones->lock);
|
|
RBTREE_FOR(node, struct local_zone*, &zones->ztree) {
|
|
lock_rw_wrlock(&node->lock);
|
|
node->parent = NULL;
|
|
if(!prev || prev->dclass != node->dclass) {
|
|
prev = node;
|
|
lock_rw_unlock(&node->lock);
|
|
continue;
|
|
}
|
|
(void)dname_lab_cmp(prev->name, prev->namelabs, node->name,
|
|
node->namelabs, &m); /* we know prev is smaller */
|
|
/* sort order like: . com. bla.com. zwb.com. net. */
|
|
/* find the previous, or parent-parent-parent */
|
|
for(p = prev; p; p = p->parent)
|
|
/* looking for name with few labels, a parent */
|
|
if(p->namelabs <= m) {
|
|
/* ==: since prev matched m, this is closest*/
|
|
/* <: prev matches more, but is not a parent,
|
|
* this one is a (grand)parent */
|
|
node->parent = p;
|
|
break;
|
|
}
|
|
prev = node;
|
|
|
|
if(node->override_tree)
|
|
addr_tree_init_parents(node->override_tree);
|
|
lock_rw_unlock(&node->lock);
|
|
}
|
|
lock_rw_unlock(&zones->lock);
|
|
}
|
|
|
|
/** enter implicit transparent zone for local-data: without local-zone: */
|
|
static int
|
|
lz_setup_implicit(struct local_zones* zones, struct config_file* cfg)
|
|
{
|
|
/* walk over all items that have no parent zone and find
|
|
* the name that covers them all (could be the root) and
|
|
* add that as a transparent zone */
|
|
struct config_strlist* p;
|
|
int have_name = 0;
|
|
int have_other_classes = 0;
|
|
uint16_t dclass = 0;
|
|
uint8_t* nm = 0;
|
|
size_t nmlen = 0;
|
|
int nmlabs = 0;
|
|
int match = 0; /* number of labels match count */
|
|
|
|
init_parents(zones); /* to enable local_zones_lookup() */
|
|
for(p = cfg->local_data; p; p = p->next) {
|
|
uint8_t* rr_name;
|
|
uint16_t rr_class, rr_type;
|
|
size_t len;
|
|
int labs;
|
|
if(!get_rr_nameclass(p->str, &rr_name, &rr_class, &rr_type)) {
|
|
log_err("Bad local-data RR %s", p->str);
|
|
return 0;
|
|
}
|
|
labs = dname_count_size_labels(rr_name, &len);
|
|
lock_rw_rdlock(&zones->lock);
|
|
if(!local_zones_lookup(zones, rr_name, len, labs, rr_class,
|
|
rr_type)) {
|
|
/* Check if there is a zone that this could go
|
|
* under but for different class; created zones are
|
|
* always for LDNS_RR_CLASS_IN. Create the zone with
|
|
* a different class but the same configured
|
|
* local_zone_type. */
|
|
struct local_zone* z = local_zones_lookup(zones,
|
|
rr_name, len, labs, LDNS_RR_CLASS_IN, rr_type);
|
|
if(z) {
|
|
uint8_t* name = memdup(z->name, z->namelen);
|
|
size_t znamelen = z->namelen;
|
|
int znamelabs = z->namelabs;
|
|
enum localzone_type ztype = z->type;
|
|
lock_rw_unlock(&zones->lock);
|
|
if(!name) {
|
|
log_err("out of memory");
|
|
free(rr_name);
|
|
return 0;
|
|
}
|
|
if(!(
|
|
#ifndef THREADS_DISABLED
|
|
z =
|
|
#endif
|
|
lz_enter_zone_dname(zones, name,
|
|
znamelen, znamelabs,
|
|
ztype, rr_class))) {
|
|
free(rr_name);
|
|
return 0;
|
|
}
|
|
lock_rw_unlock(&z->lock);
|
|
free(rr_name);
|
|
continue;
|
|
}
|
|
if(!have_name) {
|
|
dclass = rr_class;
|
|
nm = rr_name;
|
|
nmlen = len;
|
|
nmlabs = labs;
|
|
match = labs;
|
|
have_name = 1;
|
|
} else {
|
|
int m;
|
|
if(rr_class != dclass) {
|
|
/* process other classes later */
|
|
free(rr_name);
|
|
have_other_classes = 1;
|
|
lock_rw_unlock(&zones->lock);
|
|
continue;
|
|
}
|
|
/* find smallest shared topdomain */
|
|
(void)dname_lab_cmp(nm, nmlabs,
|
|
rr_name, labs, &m);
|
|
free(rr_name);
|
|
if(m < match)
|
|
match = m;
|
|
}
|
|
} else free(rr_name);
|
|
lock_rw_unlock(&zones->lock);
|
|
}
|
|
if(have_name) {
|
|
uint8_t* n2;
|
|
#ifndef THREADS_DISABLED
|
|
struct local_zone* z;
|
|
#endif
|
|
/* allocate zone of smallest shared topdomain to contain em */
|
|
n2 = nm;
|
|
dname_remove_labels(&n2, &nmlen, nmlabs - match);
|
|
n2 = memdup(n2, nmlen);
|
|
free(nm);
|
|
if(!n2) {
|
|
log_err("out of memory");
|
|
return 0;
|
|
}
|
|
log_nametypeclass(VERB_ALGO, "implicit transparent local-zone",
|
|
n2, 0, dclass);
|
|
if(!(
|
|
#ifndef THREADS_DISABLED
|
|
z=
|
|
#endif
|
|
lz_enter_zone_dname(zones, n2, nmlen, match,
|
|
local_zone_transparent, dclass))) {
|
|
return 0;
|
|
}
|
|
lock_rw_unlock(&z->lock);
|
|
}
|
|
if(have_other_classes) {
|
|
/* restart to setup other class */
|
|
return lz_setup_implicit(zones, cfg);
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/** enter local-zone-tag info */
|
|
static int
|
|
lz_enter_zone_tags(struct local_zones* zones, struct config_file* cfg)
|
|
{
|
|
struct config_strbytelist* p;
|
|
int c = 0;
|
|
for(p = cfg->local_zone_tags; p; p = p->next) {
|
|
if(!lz_enter_zone_tag(zones, p->str, p->str2, p->str2len,
|
|
LDNS_RR_CLASS_IN))
|
|
return 0;
|
|
c++;
|
|
}
|
|
if(c) verbose(VERB_ALGO, "applied tags to %d local zones", c);
|
|
return 1;
|
|
}
|
|
|
|
/** enter auth data */
|
|
static int
|
|
lz_enter_data(struct local_zones* zones, struct config_file* cfg)
|
|
{
|
|
struct config_strlist* p;
|
|
for(p = cfg->local_data; p; p = p->next) {
|
|
if(!lz_enter_rr_str(zones, p->str))
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/** free memory from config */
|
|
static void
|
|
lz_freeup_cfg(struct config_file* cfg)
|
|
{
|
|
config_deldblstrlist(cfg->local_zones);
|
|
cfg->local_zones = NULL;
|
|
config_delstrlist(cfg->local_zones_nodefault);
|
|
cfg->local_zones_nodefault = NULL;
|
|
config_delstrlist(cfg->local_data);
|
|
cfg->local_data = NULL;
|
|
}
|
|
|
|
int
|
|
local_zones_apply_cfg(struct local_zones* zones, struct config_file* cfg)
|
|
{
|
|
/* create zones from zone statements. */
|
|
if(!lz_enter_zones(zones, cfg)) {
|
|
return 0;
|
|
}
|
|
/* apply default zones+content (unless disabled, or overridden) */
|
|
if(!local_zone_enter_defaults(zones, cfg)) {
|
|
return 0;
|
|
}
|
|
/* enter local zone overrides */
|
|
if(!lz_enter_overrides(zones, cfg)) {
|
|
return 0;
|
|
}
|
|
/* create implicit transparent zone from data. */
|
|
if(!lz_setup_implicit(zones, cfg)) {
|
|
return 0;
|
|
}
|
|
|
|
/* setup parent ptrs for lookup during data entry */
|
|
init_parents(zones);
|
|
/* insert local zone tags */
|
|
if(!lz_enter_zone_tags(zones, cfg)) {
|
|
return 0;
|
|
}
|
|
/* insert local data */
|
|
if(!lz_enter_data(zones, cfg)) {
|
|
return 0;
|
|
}
|
|
/* freeup memory from cfg struct. */
|
|
lz_freeup_cfg(cfg);
|
|
return 1;
|
|
}
|
|
|
|
struct local_zone*
|
|
local_zones_lookup(struct local_zones* zones,
|
|
uint8_t* name, size_t len, int labs, uint16_t dclass, uint16_t dtype)
|
|
{
|
|
return local_zones_tags_lookup(zones, name, len, labs,
|
|
dclass, dtype, NULL, 0, 1);
|
|
}
|
|
|
|
struct local_zone*
|
|
local_zones_tags_lookup(struct local_zones* zones,
|
|
uint8_t* name, size_t len, int labs, uint16_t dclass, uint16_t dtype,
|
|
uint8_t* taglist, size_t taglen, int ignoretags)
|
|
{
|
|
rbnode_type* res = NULL;
|
|
struct local_zone *result;
|
|
struct local_zone key;
|
|
int m;
|
|
/* for type DS use a zone higher when on a zonecut */
|
|
if(dtype == LDNS_RR_TYPE_DS && !dname_is_root(name)) {
|
|
dname_remove_label(&name, &len);
|
|
labs--;
|
|
}
|
|
key.node.key = &key;
|
|
key.dclass = dclass;
|
|
key.name = name;
|
|
key.namelen = len;
|
|
key.namelabs = labs;
|
|
rbtree_find_less_equal(&zones->ztree, &key, &res);
|
|
result = (struct local_zone*)res;
|
|
/* exact or smaller element (or no element) */
|
|
if(!result || result->dclass != dclass)
|
|
return NULL;
|
|
/* count number of labels matched */
|
|
(void)dname_lab_cmp(result->name, result->namelabs, key.name,
|
|
key.namelabs, &m);
|
|
while(result) { /* go up until qname is zone or subdomain of zone */
|
|
if(result->namelabs <= m)
|
|
if(ignoretags || !result->taglist ||
|
|
taglist_intersect(result->taglist,
|
|
result->taglen, taglist, taglen))
|
|
break;
|
|
result = result->parent;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
struct local_zone*
|
|
local_zones_find(struct local_zones* zones,
|
|
uint8_t* name, size_t len, int labs, uint16_t dclass)
|
|
{
|
|
struct local_zone key;
|
|
key.node.key = &key;
|
|
key.dclass = dclass;
|
|
key.name = name;
|
|
key.namelen = len;
|
|
key.namelabs = labs;
|
|
/* exact */
|
|
return (struct local_zone*)rbtree_search(&zones->ztree, &key);
|
|
}
|
|
|
|
struct local_zone*
|
|
local_zones_find_le(struct local_zones* zones,
|
|
uint8_t* name, size_t len, int labs, uint16_t dclass,
|
|
int* exact)
|
|
{
|
|
struct local_zone key;
|
|
rbnode_type *node;
|
|
key.node.key = &key;
|
|
key.dclass = dclass;
|
|
key.name = name;
|
|
key.namelen = len;
|
|
key.namelabs = labs;
|
|
*exact = rbtree_find_less_equal(&zones->ztree, &key, &node);
|
|
return (struct local_zone*)node;
|
|
}
|
|
|
|
/** encode answer consisting of 1 rrset */
|
|
static int
|
|
local_encode(struct query_info* qinfo, struct module_env* env,
|
|
struct edns_data* edns, struct comm_reply* repinfo, sldns_buffer* buf,
|
|
struct regional* temp, struct ub_packed_rrset_key* rrset, int ansec,
|
|
int rcode)
|
|
{
|
|
struct reply_info rep;
|
|
uint16_t udpsize;
|
|
/* make answer with time=0 for fixed TTL values */
|
|
memset(&rep, 0, sizeof(rep));
|
|
rep.flags = (uint16_t)((BIT_QR | BIT_AA | BIT_RA) | rcode);
|
|
rep.qdcount = 1;
|
|
if(ansec)
|
|
rep.an_numrrsets = 1;
|
|
else rep.ns_numrrsets = 1;
|
|
rep.rrset_count = 1;
|
|
rep.rrsets = &rrset;
|
|
udpsize = edns->udp_size;
|
|
edns->edns_version = EDNS_ADVERTISED_VERSION;
|
|
edns->udp_size = EDNS_ADVERTISED_SIZE;
|
|
edns->ext_rcode = 0;
|
|
edns->bits &= EDNS_DO;
|
|
if(!inplace_cb_reply_local_call(env, qinfo, NULL, &rep, rcode, edns,
|
|
repinfo, temp, env->now_tv) || !reply_info_answer_encode(qinfo, &rep,
|
|
*(uint16_t*)sldns_buffer_begin(buf), sldns_buffer_read_u16_at(buf, 2),
|
|
buf, 0, 0, temp, udpsize, edns, (int)(edns->bits&EDNS_DO), 0)) {
|
|
error_encode(buf, (LDNS_RCODE_SERVFAIL|BIT_AA), qinfo,
|
|
*(uint16_t*)sldns_buffer_begin(buf),
|
|
sldns_buffer_read_u16_at(buf, 2), edns);
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/** encode local error answer */
|
|
static void
|
|
local_error_encode(struct query_info* qinfo, struct module_env* env,
|
|
struct edns_data* edns, struct comm_reply* repinfo, sldns_buffer* buf,
|
|
struct regional* temp, int rcode, int r, int ede_code,
|
|
const char* ede_txt)
|
|
{
|
|
edns->edns_version = EDNS_ADVERTISED_VERSION;
|
|
edns->udp_size = EDNS_ADVERTISED_SIZE;
|
|
edns->ext_rcode = 0;
|
|
edns->bits &= EDNS_DO;
|
|
|
|
if(!inplace_cb_reply_local_call(env, qinfo, NULL, NULL,
|
|
rcode, edns, repinfo, temp, env->now_tv))
|
|
edns->opt_list_inplace_cb_out = NULL;
|
|
|
|
if(ede_code != LDNS_EDE_NONE && env->cfg->ede) {
|
|
edns_opt_list_append_ede(&edns->opt_list_out, temp,
|
|
ede_code, ede_txt);
|
|
}
|
|
|
|
error_encode(buf, r, qinfo, *(uint16_t*)sldns_buffer_begin(buf),
|
|
sldns_buffer_read_u16_at(buf, 2), edns);
|
|
}
|
|
|
|
/** find local data tag string match for the given type in the list */
|
|
int
|
|
local_data_find_tag_datas(const struct query_info* qinfo,
|
|
struct config_strlist* list, struct ub_packed_rrset_key* r,
|
|
struct regional* temp)
|
|
{
|
|
struct config_strlist* p;
|
|
char buf[65536];
|
|
uint8_t rr[LDNS_RR_BUF_SIZE];
|
|
size_t len;
|
|
int res;
|
|
struct packed_rrset_data* d;
|
|
for(p=list; p; p=p->next) {
|
|
uint16_t rdr_type;
|
|
|
|
len = sizeof(rr);
|
|
/* does this element match the type? */
|
|
snprintf(buf, sizeof(buf), ". %s", p->str);
|
|
res = sldns_str2wire_rr_buf(buf, rr, &len, NULL, 3600,
|
|
NULL, 0, NULL, 0);
|
|
if(res != 0)
|
|
/* parse errors are already checked before, in
|
|
* acllist check_data, skip this for robustness */
|
|
continue;
|
|
if(len < 1 /* . */ + 8 /* typeclassttl*/ + 2 /*rdatalen*/)
|
|
continue;
|
|
rdr_type = sldns_wirerr_get_type(rr, len, 1);
|
|
if(rdr_type != qinfo->qtype && rdr_type != LDNS_RR_TYPE_CNAME)
|
|
continue;
|
|
|
|
/* do we have entries already? if not setup key */
|
|
if(r->rk.dname == NULL) {
|
|
r->entry.key = r;
|
|
r->rk.dname = qinfo->qname;
|
|
r->rk.dname_len = qinfo->qname_len;
|
|
r->rk.type = htons(rdr_type);
|
|
r->rk.rrset_class = htons(qinfo->qclass);
|
|
r->rk.flags = 0;
|
|
d = (struct packed_rrset_data*)regional_alloc_zero(
|
|
temp, sizeof(struct packed_rrset_data)
|
|
+ sizeof(size_t) + sizeof(uint8_t*) +
|
|
sizeof(time_t));
|
|
if(!d) return 0; /* out of memory */
|
|
r->entry.data = d;
|
|
d->ttl = sldns_wirerr_get_ttl(rr, len, 1);
|
|
d->rr_len = (size_t*)((uint8_t*)d +
|
|
sizeof(struct packed_rrset_data));
|
|
d->rr_data = (uint8_t**)&(d->rr_len[1]);
|
|
d->rr_ttl = (time_t*)&(d->rr_data[1]);
|
|
}
|
|
d = (struct packed_rrset_data*)r->entry.data;
|
|
/* add entry to the data */
|
|
if(d->count != 0) {
|
|
size_t* oldlen = d->rr_len;
|
|
uint8_t** olddata = d->rr_data;
|
|
time_t* oldttl = d->rr_ttl;
|
|
/* increase arrays for lookup */
|
|
/* this is of course slow for very many records,
|
|
* but most redirects are expected with few records */
|
|
d->rr_len = (size_t*)regional_alloc_zero(temp,
|
|
(d->count+1)*sizeof(size_t));
|
|
d->rr_data = (uint8_t**)regional_alloc_zero(temp,
|
|
(d->count+1)*sizeof(uint8_t*));
|
|
d->rr_ttl = (time_t*)regional_alloc_zero(temp,
|
|
(d->count+1)*sizeof(time_t));
|
|
if(!d->rr_len || !d->rr_data || !d->rr_ttl)
|
|
return 0; /* out of memory */
|
|
/* first one was allocated after struct d, but new
|
|
* ones get their own array increment alloc, so
|
|
* copy old content */
|
|
memmove(d->rr_len, oldlen, d->count*sizeof(size_t));
|
|
memmove(d->rr_data, olddata, d->count*sizeof(uint8_t*));
|
|
memmove(d->rr_ttl, oldttl, d->count*sizeof(time_t));
|
|
}
|
|
|
|
d->rr_len[d->count] = sldns_wirerr_get_rdatalen(rr, len, 1)+2;
|
|
d->rr_ttl[d->count] = sldns_wirerr_get_ttl(rr, len, 1);
|
|
d->rr_data[d->count] = regional_alloc_init(temp,
|
|
sldns_wirerr_get_rdatawl(rr, len, 1),
|
|
d->rr_len[d->count]);
|
|
if(!d->rr_data[d->count])
|
|
return 0; /* out of memory */
|
|
d->count++;
|
|
}
|
|
if(r->rk.dname)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
find_tag_datas(struct query_info* qinfo, struct config_strlist* list,
|
|
struct ub_packed_rrset_key* r, struct regional* temp)
|
|
{
|
|
int result = local_data_find_tag_datas(qinfo, list, r, temp);
|
|
|
|
/* If we've found a non-exact alias type of local data, make a shallow
|
|
* copy of the RRset and remember it in qinfo to complete the alias
|
|
* chain later. */
|
|
if(result && qinfo->qtype != LDNS_RR_TYPE_CNAME &&
|
|
r->rk.type == htons(LDNS_RR_TYPE_CNAME)) {
|
|
qinfo->local_alias =
|
|
regional_alloc_zero(temp, sizeof(struct local_rrset));
|
|
if(!qinfo->local_alias)
|
|
return 0; /* out of memory */
|
|
qinfo->local_alias->rrset =
|
|
regional_alloc_init(temp, r, sizeof(*r));
|
|
if(!qinfo->local_alias->rrset)
|
|
return 0; /* out of memory */
|
|
}
|
|
return result;
|
|
}
|
|
|
|
int
|
|
local_data_answer(struct local_zone* z, struct module_env* env,
|
|
struct query_info* qinfo, struct edns_data* edns,
|
|
struct comm_reply* repinfo, sldns_buffer* buf,
|
|
struct regional* temp, int labs, struct local_data** ldp,
|
|
enum localzone_type lz_type, int tag, struct config_strlist** tag_datas,
|
|
size_t tag_datas_size, char** tagname, int num_tags)
|
|
{
|
|
struct local_data key;
|
|
struct local_data* ld;
|
|
struct local_rrset* lr;
|
|
key.node.key = &key;
|
|
key.name = qinfo->qname;
|
|
key.namelen = qinfo->qname_len;
|
|
key.namelabs = labs;
|
|
if(lz_type == local_zone_redirect ||
|
|
lz_type == local_zone_inform_redirect) {
|
|
key.name = z->name;
|
|
key.namelen = z->namelen;
|
|
key.namelabs = z->namelabs;
|
|
if(tag != -1 && (size_t)tag<tag_datas_size && tag_datas[tag]) {
|
|
struct ub_packed_rrset_key r;
|
|
memset(&r, 0, sizeof(r));
|
|
if(find_tag_datas(qinfo, tag_datas[tag], &r, temp)) {
|
|
verbose(VERB_ALGO, "redirect with tag data [%d] %s",
|
|
tag, (tag<num_tags?tagname[tag]:"null"));
|
|
|
|
/* If we found a matching alias, we should
|
|
* use it as part of the answer, but we can't
|
|
* encode it until we complete the alias
|
|
* chain. */
|
|
if(qinfo->local_alias)
|
|
return 1;
|
|
return local_encode(qinfo, env, edns, repinfo, buf, temp,
|
|
&r, 1, LDNS_RCODE_NOERROR);
|
|
}
|
|
}
|
|
}
|
|
ld = (struct local_data*)rbtree_search(&z->data, &key.node);
|
|
*ldp = ld;
|
|
if(!ld) {
|
|
return 0;
|
|
}
|
|
lr = local_data_find_type(ld, qinfo->qtype, 1);
|
|
if(!lr)
|
|
return 0;
|
|
|
|
/* Special case for alias matching. See local_data_answer(). */
|
|
if((lz_type == local_zone_redirect ||
|
|
lz_type == local_zone_inform_redirect) &&
|
|
qinfo->qtype != LDNS_RR_TYPE_CNAME &&
|
|
lr->rrset->rk.type == htons(LDNS_RR_TYPE_CNAME)) {
|
|
uint8_t* ctarget;
|
|
size_t ctargetlen = 0;
|
|
|
|
qinfo->local_alias =
|
|
regional_alloc_zero(temp, sizeof(struct local_rrset));
|
|
if(!qinfo->local_alias)
|
|
return 0; /* out of memory */
|
|
qinfo->local_alias->rrset = regional_alloc_init(
|
|
temp, lr->rrset, sizeof(*lr->rrset));
|
|
if(!qinfo->local_alias->rrset)
|
|
return 0; /* out of memory */
|
|
qinfo->local_alias->rrset->rk.dname = qinfo->qname;
|
|
qinfo->local_alias->rrset->rk.dname_len = qinfo->qname_len;
|
|
get_cname_target(lr->rrset, &ctarget, &ctargetlen);
|
|
if(!ctargetlen)
|
|
return 0; /* invalid cname */
|
|
if(dname_is_wild(ctarget)) {
|
|
/* synthesize cname target */
|
|
struct packed_rrset_data* d;
|
|
/* -3 for wildcard label and root label from qname */
|
|
size_t newtargetlen = qinfo->qname_len + ctargetlen - 3;
|
|
|
|
log_assert(ctargetlen >= 3);
|
|
log_assert(qinfo->qname_len >= 1);
|
|
|
|
if(newtargetlen > LDNS_MAX_DOMAINLEN) {
|
|
qinfo->local_alias = NULL;
|
|
local_error_encode(qinfo, env, edns, repinfo,
|
|
buf, temp, LDNS_RCODE_YXDOMAIN,
|
|
(LDNS_RCODE_YXDOMAIN|BIT_AA),
|
|
LDNS_EDE_OTHER,
|
|
"DNAME expansion became too large");
|
|
return 1;
|
|
}
|
|
memset(&qinfo->local_alias->rrset->entry, 0,
|
|
sizeof(qinfo->local_alias->rrset->entry));
|
|
qinfo->local_alias->rrset->entry.key =
|
|
qinfo->local_alias->rrset;
|
|
qinfo->local_alias->rrset->entry.hash =
|
|
rrset_key_hash(&qinfo->local_alias->rrset->rk);
|
|
d = (struct packed_rrset_data*)regional_alloc_zero(temp,
|
|
sizeof(struct packed_rrset_data) + sizeof(size_t) +
|
|
sizeof(uint8_t*) + sizeof(time_t) + sizeof(uint16_t)
|
|
+ newtargetlen);
|
|
if(!d)
|
|
return 0; /* out of memory */
|
|
qinfo->local_alias->rrset->entry.data = d;
|
|
d->ttl = 0; /* 0 for synthesized CNAME TTL */
|
|
d->count = 1;
|
|
d->rrsig_count = 0;
|
|
d->trust = rrset_trust_ans_noAA;
|
|
d->rr_len = (size_t*)((uint8_t*)d +
|
|
sizeof(struct packed_rrset_data));
|
|
d->rr_len[0] = newtargetlen + sizeof(uint16_t);
|
|
packed_rrset_ptr_fixup(d);
|
|
d->rr_ttl[0] = d->ttl;
|
|
sldns_write_uint16(d->rr_data[0], newtargetlen);
|
|
/* write qname */
|
|
memmove(d->rr_data[0] + sizeof(uint16_t), qinfo->qname,
|
|
qinfo->qname_len - 1);
|
|
/* write cname target wildcard label */
|
|
memmove(d->rr_data[0] + sizeof(uint16_t) +
|
|
qinfo->qname_len - 1, ctarget + 2,
|
|
ctargetlen - 2);
|
|
}
|
|
return 1;
|
|
}
|
|
if(lz_type == local_zone_redirect ||
|
|
lz_type == local_zone_inform_redirect) {
|
|
/* convert rrset name to query name; like a wildcard */
|
|
struct ub_packed_rrset_key r = *lr->rrset;
|
|
r.rk.dname = qinfo->qname;
|
|
r.rk.dname_len = qinfo->qname_len;
|
|
return local_encode(qinfo, env, edns, repinfo, buf, temp, &r, 1,
|
|
LDNS_RCODE_NOERROR);
|
|
}
|
|
return local_encode(qinfo, env, edns, repinfo, buf, temp, lr->rrset, 1,
|
|
LDNS_RCODE_NOERROR);
|
|
}
|
|
|
|
/**
|
|
* See if the local zone does not cover the name, eg. the name is not
|
|
* in the zone and the zone is transparent */
|
|
static int
|
|
local_zone_does_not_cover(struct local_zone* z, struct query_info* qinfo,
|
|
int labs)
|
|
{
|
|
struct local_data key;
|
|
struct local_data* ld = NULL;
|
|
struct local_rrset* lr = NULL;
|
|
if(z->type == local_zone_always_transparent)
|
|
return 1;
|
|
if(z->type != local_zone_transparent
|
|
&& z->type != local_zone_typetransparent
|
|
&& z->type != local_zone_inform)
|
|
return 0;
|
|
key.node.key = &key;
|
|
key.name = qinfo->qname;
|
|
key.namelen = qinfo->qname_len;
|
|
key.namelabs = labs;
|
|
ld = (struct local_data*)rbtree_search(&z->data, &key.node);
|
|
if(z->type == local_zone_transparent || z->type == local_zone_inform)
|
|
return (ld == NULL);
|
|
if(ld)
|
|
lr = local_data_find_type(ld, qinfo->qtype, 1);
|
|
/* local_zone_typetransparent */
|
|
return (lr == NULL);
|
|
}
|
|
|
|
static inline int
|
|
local_zone_is_udp_query(struct comm_reply* repinfo) {
|
|
return repinfo != NULL
|
|
? (repinfo->c != NULL
|
|
? repinfo->c->type == comm_udp
|
|
: 0)
|
|
: 0;
|
|
}
|
|
|
|
int
|
|
local_zones_zone_answer(struct local_zone* z, struct module_env* env,
|
|
struct query_info* qinfo, struct edns_data* edns,
|
|
struct comm_reply* repinfo, sldns_buffer* buf, struct regional* temp,
|
|
struct local_data* ld, enum localzone_type lz_type)
|
|
{
|
|
if(lz_type == local_zone_deny ||
|
|
lz_type == local_zone_always_deny ||
|
|
lz_type == local_zone_inform_deny) {
|
|
/** no reply at all, signal caller by clearing buffer. */
|
|
sldns_buffer_clear(buf);
|
|
sldns_buffer_flip(buf);
|
|
return 1;
|
|
} else if(lz_type == local_zone_refuse
|
|
|| lz_type == local_zone_always_refuse) {
|
|
local_error_encode(qinfo, env, edns, repinfo, buf, temp,
|
|
LDNS_RCODE_REFUSED, (LDNS_RCODE_REFUSED|BIT_AA),
|
|
LDNS_EDE_NONE, NULL);
|
|
return 1;
|
|
} else if(lz_type == local_zone_static ||
|
|
lz_type == local_zone_redirect ||
|
|
lz_type == local_zone_inform_redirect ||
|
|
lz_type == local_zone_always_nxdomain ||
|
|
lz_type == local_zone_always_nodata ||
|
|
(lz_type == local_zone_truncate
|
|
&& local_zone_is_udp_query(repinfo))) {
|
|
/* for static, reply nodata or nxdomain
|
|
* for redirect, reply nodata */
|
|
/* no additional section processing,
|
|
* cname, dname or wildcard processing,
|
|
* or using closest match for NSEC.
|
|
* or using closest match for returning delegation downwards
|
|
*/
|
|
int rcode = (ld || lz_type == local_zone_redirect ||
|
|
lz_type == local_zone_inform_redirect ||
|
|
lz_type == local_zone_always_nodata ||
|
|
lz_type == local_zone_truncate)?
|
|
LDNS_RCODE_NOERROR:LDNS_RCODE_NXDOMAIN;
|
|
rcode = (lz_type == local_zone_truncate ? (rcode|BIT_TC) : rcode);
|
|
if(z != NULL && z->soa && z->soa_negative)
|
|
return local_encode(qinfo, env, edns, repinfo, buf, temp,
|
|
z->soa_negative, 0, rcode);
|
|
local_error_encode(qinfo, env, edns, repinfo, buf, temp,
|
|
rcode, (rcode|BIT_AA), LDNS_EDE_NONE, NULL);
|
|
return 1;
|
|
} else if(lz_type == local_zone_typetransparent
|
|
|| lz_type == local_zone_always_transparent) {
|
|
/* no NODATA or NXDOMAINS for this zone type */
|
|
return 0;
|
|
} else if(lz_type == local_zone_always_null) {
|
|
/* 0.0.0.0 or ::0 or noerror/nodata for this zone type,
|
|
* used for blocklists. */
|
|
if(qinfo->qtype == LDNS_RR_TYPE_A ||
|
|
qinfo->qtype == LDNS_RR_TYPE_AAAA) {
|
|
struct ub_packed_rrset_key lrr;
|
|
struct packed_rrset_data d;
|
|
time_t rr_ttl = 3600;
|
|
size_t rr_len = 0;
|
|
uint8_t rr_data[2+16] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
|
|
uint8_t* rr_datas = rr_data;
|
|
memset(&lrr, 0, sizeof(lrr));
|
|
memset(&d, 0, sizeof(d));
|
|
lrr.entry.data = &d;
|
|
lrr.rk.dname = qinfo->qname;
|
|
lrr.rk.dname_len = qinfo->qname_len;
|
|
lrr.rk.type = htons(qinfo->qtype);
|
|
lrr.rk.rrset_class = htons(qinfo->qclass);
|
|
if(qinfo->qtype == LDNS_RR_TYPE_A) {
|
|
rr_len = 4;
|
|
sldns_write_uint16(rr_data, rr_len);
|
|
rr_len += 2;
|
|
} else {
|
|
rr_len = 16;
|
|
sldns_write_uint16(rr_data, rr_len);
|
|
rr_len += 2;
|
|
}
|
|
d.ttl = rr_ttl;
|
|
d.count = 1;
|
|
d.rr_len = &rr_len;
|
|
d.rr_data = &rr_datas;
|
|
d.rr_ttl = &rr_ttl;
|
|
return local_encode(qinfo, env, edns, repinfo, buf, temp,
|
|
&lrr, 1, LDNS_RCODE_NOERROR);
|
|
} else {
|
|
/* NODATA: No EDE needed */
|
|
local_error_encode(qinfo, env, edns, repinfo, buf,
|
|
temp, LDNS_RCODE_NOERROR,
|
|
(LDNS_RCODE_NOERROR|BIT_AA), -1, NULL);
|
|
}
|
|
return 1;
|
|
}
|
|
/* else lz_type == local_zone_transparent */
|
|
|
|
/* if the zone is transparent and the name exists, but the type
|
|
* does not, then we should make this noerror/nodata */
|
|
if(ld && ld->rrsets) {
|
|
int rcode = LDNS_RCODE_NOERROR;
|
|
if(z != NULL && z->soa && z->soa_negative)
|
|
return local_encode(qinfo, env, edns, repinfo, buf, temp,
|
|
z->soa_negative, 0, rcode);
|
|
/* NODATA: No EDE needed */
|
|
local_error_encode(qinfo, env, edns, repinfo, buf, temp, rcode,
|
|
(rcode|BIT_AA), LDNS_EDE_NONE, NULL);
|
|
return 1;
|
|
}
|
|
|
|
/* stop here, and resolve further on */
|
|
return 0;
|
|
}
|
|
|
|
/** print log information for an inform zone query */
|
|
static void
|
|
lz_inform_print(struct local_zone* z, struct query_info* qinfo,
|
|
struct sockaddr_storage* addr, socklen_t addrlen)
|
|
{
|
|
char ip[128], txt[512];
|
|
char zname[LDNS_MAX_DOMAINLEN+1];
|
|
uint16_t port = ntohs(((struct sockaddr_in*)addr)->sin_port);
|
|
dname_str(z->name, zname);
|
|
addr_to_str(addr, addrlen, ip, sizeof(ip));
|
|
snprintf(txt, sizeof(txt), "%s %s %s@%u", zname, local_zone_type2str(z->type), ip,
|
|
(unsigned)port);
|
|
log_nametypeclass(NO_VERBOSE, txt, qinfo->qname, qinfo->qtype, qinfo->qclass);
|
|
}
|
|
|
|
static enum localzone_type
|
|
lz_type(uint8_t *taglist, size_t taglen, uint8_t *taglist2, size_t taglen2,
|
|
uint8_t *tagactions, size_t tagactionssize, enum localzone_type lzt,
|
|
struct comm_reply* repinfo, struct rbtree_type* override_tree,
|
|
int* tag, char** tagname, int num_tags)
|
|
{
|
|
struct local_zone_override* lzo;
|
|
if(repinfo && override_tree) {
|
|
lzo = (struct local_zone_override*)addr_tree_lookup(
|
|
override_tree, &repinfo->client_addr,
|
|
repinfo->client_addrlen);
|
|
if(lzo && lzo->type) {
|
|
verbose(VERB_ALGO, "local zone override to type %s",
|
|
local_zone_type2str(lzo->type));
|
|
return lzo->type;
|
|
}
|
|
}
|
|
if(!taglist || !taglist2)
|
|
return lzt;
|
|
return local_data_find_tag_action(taglist, taglen, taglist2, taglen2,
|
|
tagactions, tagactionssize, lzt, tag, tagname, num_tags);
|
|
}
|
|
|
|
enum localzone_type
|
|
local_data_find_tag_action(const uint8_t* taglist, size_t taglen,
|
|
const uint8_t* taglist2, size_t taglen2, const uint8_t* tagactions,
|
|
size_t tagactionssize, enum localzone_type lzt, int* tag,
|
|
char* const* tagname, int num_tags)
|
|
{
|
|
size_t i, j;
|
|
uint8_t tagmatch;
|
|
|
|
for(i=0; i<taglen && i<taglen2; i++) {
|
|
tagmatch = (taglist[i] & taglist2[i]);
|
|
for(j=0; j<8 && tagmatch>0; j++) {
|
|
if((tagmatch & 0x1)) {
|
|
*tag = (int)(i*8+j);
|
|
verbose(VERB_ALGO, "matched tag [%d] %s",
|
|
*tag, (*tag<num_tags?tagname[*tag]:"null"));
|
|
/* does this tag have a tag action? */
|
|
if(i*8+j < tagactionssize && tagactions
|
|
&& tagactions[i*8+j] != 0) {
|
|
verbose(VERB_ALGO, "tag action [%d] %s to type %s",
|
|
*tag, (*tag<num_tags?tagname[*tag]:"null"),
|
|
local_zone_type2str(
|
|
(enum localzone_type)
|
|
tagactions[i*8+j]));
|
|
return (enum localzone_type)tagactions[i*8+j];
|
|
}
|
|
return lzt;
|
|
}
|
|
tagmatch >>= 1;
|
|
}
|
|
}
|
|
return lzt;
|
|
}
|
|
|
|
int
|
|
local_zones_answer(struct local_zones* zones, struct module_env* env,
|
|
struct query_info* qinfo, struct edns_data* edns, sldns_buffer* buf,
|
|
struct regional* temp, struct comm_reply* repinfo, uint8_t* taglist,
|
|
size_t taglen, uint8_t* tagactions, size_t tagactionssize,
|
|
struct config_strlist** tag_datas, size_t tag_datas_size,
|
|
char** tagname, int num_tags, struct view* view)
|
|
{
|
|
/* see if query is covered by a zone,
|
|
* if so: - try to match (exact) local data
|
|
* - look at zone type for negative response. */
|
|
int labs = dname_count_labels(qinfo->qname);
|
|
struct local_data* ld = NULL;
|
|
struct local_zone* z = NULL;
|
|
enum localzone_type lzt = local_zone_transparent;
|
|
int r, tag = -1;
|
|
|
|
if(view) {
|
|
lock_rw_rdlock(&view->lock);
|
|
if(view->local_zones &&
|
|
(z = local_zones_lookup(view->local_zones,
|
|
qinfo->qname, qinfo->qname_len, labs,
|
|
qinfo->qclass, qinfo->qtype))) {
|
|
lock_rw_rdlock(&z->lock);
|
|
lzt = z->type;
|
|
}
|
|
if(lzt == local_zone_noview) {
|
|
lock_rw_unlock(&z->lock);
|
|
z = NULL;
|
|
}
|
|
if(z && (lzt == local_zone_transparent ||
|
|
lzt == local_zone_typetransparent ||
|
|
lzt == local_zone_inform ||
|
|
lzt == local_zone_always_transparent) &&
|
|
local_zone_does_not_cover(z, qinfo, labs)) {
|
|
lock_rw_unlock(&z->lock);
|
|
z = NULL;
|
|
}
|
|
if(view->local_zones && !z && !view->isfirst){
|
|
lock_rw_unlock(&view->lock);
|
|
return 0;
|
|
}
|
|
if(z && verbosity >= VERB_ALGO) {
|
|
char zname[255+1];
|
|
dname_str(z->name, zname);
|
|
verbose(VERB_ALGO, "using localzone %s %s from view %s",
|
|
zname, local_zone_type2str(lzt), view->name);
|
|
}
|
|
lock_rw_unlock(&view->lock);
|
|
}
|
|
if(!z) {
|
|
/* try global local_zones tree */
|
|
lock_rw_rdlock(&zones->lock);
|
|
if(!(z = local_zones_tags_lookup(zones, qinfo->qname,
|
|
qinfo->qname_len, labs, qinfo->qclass, qinfo->qtype,
|
|
taglist, taglen, 0))) {
|
|
lock_rw_unlock(&zones->lock);
|
|
return 0;
|
|
}
|
|
lock_rw_rdlock(&z->lock);
|
|
lzt = lz_type(taglist, taglen, z->taglist, z->taglen,
|
|
tagactions, tagactionssize, z->type, repinfo,
|
|
z->override_tree, &tag, tagname, num_tags);
|
|
lock_rw_unlock(&zones->lock);
|
|
if(z && verbosity >= VERB_ALGO) {
|
|
char zname[255+1];
|
|
dname_str(z->name, zname);
|
|
verbose(VERB_ALGO, "using localzone %s %s", zname,
|
|
local_zone_type2str(lzt));
|
|
}
|
|
}
|
|
if((env->cfg->log_local_actions ||
|
|
lzt == local_zone_inform ||
|
|
lzt == local_zone_inform_deny ||
|
|
lzt == local_zone_inform_redirect)
|
|
&& repinfo)
|
|
lz_inform_print(z, qinfo, &repinfo->client_addr,
|
|
repinfo->client_addrlen);
|
|
|
|
if(lzt != local_zone_always_refuse
|
|
&& lzt != local_zone_always_transparent
|
|
&& lzt != local_zone_always_nxdomain
|
|
&& lzt != local_zone_always_nodata
|
|
&& lzt != local_zone_always_deny
|
|
&& local_data_answer(z, env, qinfo, edns, repinfo, buf, temp, labs,
|
|
&ld, lzt, tag, tag_datas, tag_datas_size, tagname, num_tags)) {
|
|
lock_rw_unlock(&z->lock);
|
|
/* We should tell the caller that encode is deferred if we found
|
|
* a local alias. */
|
|
return !qinfo->local_alias;
|
|
}
|
|
r = local_zones_zone_answer(z, env, qinfo, edns, repinfo, buf, temp, ld, lzt);
|
|
lock_rw_unlock(&z->lock);
|
|
return r && !qinfo->local_alias; /* see above */
|
|
}
|
|
|
|
const char* local_zone_type2str(enum localzone_type t)
|
|
{
|
|
switch(t) {
|
|
case local_zone_unset: return "unset";
|
|
case local_zone_deny: return "deny";
|
|
case local_zone_refuse: return "refuse";
|
|
case local_zone_redirect: return "redirect";
|
|
case local_zone_transparent: return "transparent";
|
|
case local_zone_typetransparent: return "typetransparent";
|
|
case local_zone_static: return "static";
|
|
case local_zone_nodefault: return "nodefault";
|
|
case local_zone_inform: return "inform";
|
|
case local_zone_inform_deny: return "inform_deny";
|
|
case local_zone_inform_redirect: return "inform_redirect";
|
|
case local_zone_always_transparent: return "always_transparent";
|
|
case local_zone_always_refuse: return "always_refuse";
|
|
case local_zone_always_nxdomain: return "always_nxdomain";
|
|
case local_zone_always_nodata: return "always_nodata";
|
|
case local_zone_always_deny: return "always_deny";
|
|
case local_zone_always_null: return "always_null";
|
|
case local_zone_noview: return "noview";
|
|
case local_zone_truncate: return "truncate";
|
|
case local_zone_invalid: return "invalid";
|
|
}
|
|
return "badtyped";
|
|
}
|
|
|
|
int local_zone_str2type(const char* type, enum localzone_type* t)
|
|
{
|
|
if(strcmp(type, "deny") == 0)
|
|
*t = local_zone_deny;
|
|
else if(strcmp(type, "refuse") == 0)
|
|
*t = local_zone_refuse;
|
|
else if(strcmp(type, "static") == 0)
|
|
*t = local_zone_static;
|
|
else if(strcmp(type, "transparent") == 0)
|
|
*t = local_zone_transparent;
|
|
else if(strcmp(type, "typetransparent") == 0)
|
|
*t = local_zone_typetransparent;
|
|
else if(strcmp(type, "redirect") == 0)
|
|
*t = local_zone_redirect;
|
|
else if(strcmp(type, "inform") == 0)
|
|
*t = local_zone_inform;
|
|
else if(strcmp(type, "inform_deny") == 0)
|
|
*t = local_zone_inform_deny;
|
|
else if(strcmp(type, "inform_redirect") == 0)
|
|
*t = local_zone_inform_redirect;
|
|
else if(strcmp(type, "always_transparent") == 0)
|
|
*t = local_zone_always_transparent;
|
|
else if(strcmp(type, "always_refuse") == 0)
|
|
*t = local_zone_always_refuse;
|
|
else if(strcmp(type, "always_nxdomain") == 0)
|
|
*t = local_zone_always_nxdomain;
|
|
else if(strcmp(type, "always_nodata") == 0)
|
|
*t = local_zone_always_nodata;
|
|
else if(strcmp(type, "always_deny") == 0)
|
|
*t = local_zone_always_deny;
|
|
else if(strcmp(type, "always_null") == 0)
|
|
*t = local_zone_always_null;
|
|
else if(strcmp(type, "noview") == 0)
|
|
*t = local_zone_noview;
|
|
else if(strcmp(type, "truncate") == 0)
|
|
*t = local_zone_truncate;
|
|
else if(strcmp(type, "nodefault") == 0)
|
|
*t = local_zone_nodefault;
|
|
else return 0;
|
|
return 1;
|
|
}
|
|
|
|
/** iterate over the kiddies of the given name and set their parent ptr */
|
|
static void
|
|
set_kiddo_parents(struct local_zone* z, struct local_zone* match,
|
|
struct local_zone* newp)
|
|
{
|
|
/* both zones and z are locked already */
|
|
/* in the sorted rbtree, the kiddies of z are located after z */
|
|
/* z must be present in the tree */
|
|
struct local_zone* p = z;
|
|
p = (struct local_zone*)rbtree_next(&p->node);
|
|
while(p!=(struct local_zone*)RBTREE_NULL &&
|
|
p->dclass == z->dclass && dname_strict_subdomain(p->name,
|
|
p->namelabs, z->name, z->namelabs)) {
|
|
/* update parent ptr */
|
|
/* only when matches with existing parent pointer, so that
|
|
* deeper child structures are not touched, i.e.
|
|
* update of x, and a.x, b.x, f.b.x, g.b.x, c.x, y
|
|
* gets to update a.x, b.x and c.x */
|
|
lock_rw_wrlock(&p->lock);
|
|
if(p->parent == match)
|
|
p->parent = newp;
|
|
lock_rw_unlock(&p->lock);
|
|
p = (struct local_zone*)rbtree_next(&p->node);
|
|
}
|
|
}
|
|
|
|
struct local_zone* local_zones_add_zone(struct local_zones* zones,
|
|
uint8_t* name, size_t len, int labs, uint16_t dclass,
|
|
enum localzone_type tp)
|
|
{
|
|
/* create */
|
|
struct local_zone* z = local_zone_create(name, len, labs, tp, dclass);
|
|
if(!z) {
|
|
free(name);
|
|
return NULL;
|
|
}
|
|
lock_rw_wrlock(&z->lock);
|
|
|
|
/* find the closest parent */
|
|
z->parent = local_zones_find(zones, name, len, labs, dclass);
|
|
|
|
/* insert into the tree */
|
|
if(!rbtree_insert(&zones->ztree, &z->node)) {
|
|
/* duplicate entry! */
|
|
lock_rw_unlock(&z->lock);
|
|
local_zone_delete(z);
|
|
log_err("internal: duplicate entry in local_zones_add_zone");
|
|
return NULL;
|
|
}
|
|
|
|
/* set parent pointers right */
|
|
set_kiddo_parents(z, z->parent, z);
|
|
|
|
lock_rw_unlock(&z->lock);
|
|
return z;
|
|
}
|
|
|
|
void local_zones_del_zone(struct local_zones* zones, struct local_zone* z)
|
|
{
|
|
/* fix up parents in tree */
|
|
lock_rw_wrlock(&z->lock);
|
|
set_kiddo_parents(z, z, z->parent);
|
|
|
|
/* remove from tree */
|
|
(void)rbtree_delete(&zones->ztree, z);
|
|
|
|
/* delete the zone */
|
|
lock_rw_unlock(&z->lock);
|
|
local_zone_delete(z);
|
|
}
|
|
|
|
int
|
|
local_zones_add_RR(struct local_zones* zones, const char* rr)
|
|
{
|
|
uint8_t* rr_name;
|
|
uint16_t rr_class, rr_type;
|
|
size_t len;
|
|
int labs;
|
|
struct local_zone* z;
|
|
int r;
|
|
if(!get_rr_nameclass(rr, &rr_name, &rr_class, &rr_type)) {
|
|
return 0;
|
|
}
|
|
labs = dname_count_size_labels(rr_name, &len);
|
|
/* could first try readlock then get writelock if zone does not exist,
|
|
* but we do not add enough RRs (from multiple threads) to optimize */
|
|
lock_rw_wrlock(&zones->lock);
|
|
z = local_zones_lookup(zones, rr_name, len, labs, rr_class, rr_type);
|
|
if(!z) {
|
|
z = local_zones_add_zone(zones, rr_name, len, labs, rr_class,
|
|
local_zone_transparent);
|
|
if(!z) {
|
|
lock_rw_unlock(&zones->lock);
|
|
return 0;
|
|
}
|
|
} else {
|
|
free(rr_name);
|
|
}
|
|
lock_rw_wrlock(&z->lock);
|
|
lock_rw_unlock(&zones->lock);
|
|
r = lz_enter_rr_into_zone(z, rr);
|
|
lock_rw_unlock(&z->lock);
|
|
return r;
|
|
}
|
|
|
|
/** returns true if the node is terminal so no deeper domain names exist */
|
|
static int
|
|
is_terminal(struct local_data* d)
|
|
{
|
|
/* for empty nonterminals, the deeper domain names are sorted
|
|
* right after them, so simply check the next name in the tree
|
|
*/
|
|
struct local_data* n = (struct local_data*)rbtree_next(&d->node);
|
|
if(n == (struct local_data*)RBTREE_NULL)
|
|
return 1; /* last in tree, no deeper node */
|
|
if(dname_strict_subdomain(n->name, n->namelabs, d->name, d->namelabs))
|
|
return 0; /* there is a deeper node */
|
|
return 1;
|
|
}
|
|
|
|
/** delete empty terminals from tree when final data is deleted */
|
|
static void
|
|
del_empty_term(struct local_zone* z, struct local_data* d,
|
|
uint8_t* name, size_t len, int labs)
|
|
{
|
|
while(d && d->rrsets == NULL && is_terminal(d)) {
|
|
/* is this empty nonterminal? delete */
|
|
/* note, no memory recycling in zone region */
|
|
(void)rbtree_delete(&z->data, d);
|
|
|
|
/* go up and to the next label */
|
|
if(dname_is_root(name))
|
|
return;
|
|
dname_remove_label(&name, &len);
|
|
labs--;
|
|
d = local_zone_find_data(z, name, len, labs);
|
|
}
|
|
}
|
|
|
|
/** find and remove type from list in domain struct */
|
|
static void
|
|
del_local_rrset(struct local_data* d, uint16_t dtype)
|
|
{
|
|
struct local_rrset* prev=NULL, *p=d->rrsets;
|
|
while(p && ntohs(p->rrset->rk.type) != dtype) {
|
|
prev = p;
|
|
p = p->next;
|
|
}
|
|
if(!p)
|
|
return; /* rrset type not found */
|
|
/* unlink it */
|
|
if(prev) prev->next = p->next;
|
|
else d->rrsets = p->next;
|
|
/* no memory recycling for zone deletions ... */
|
|
}
|
|
|
|
void local_zones_del_data(struct local_zones* zones,
|
|
uint8_t* name, size_t len, int labs, uint16_t dclass)
|
|
{
|
|
/* find zone */
|
|
struct local_zone* z;
|
|
struct local_data* d;
|
|
|
|
/* remove DS */
|
|
lock_rw_rdlock(&zones->lock);
|
|
z = local_zones_lookup(zones, name, len, labs, dclass, LDNS_RR_TYPE_DS);
|
|
if(z) {
|
|
lock_rw_wrlock(&z->lock);
|
|
d = local_zone_find_data(z, name, len, labs);
|
|
if(d) {
|
|
del_local_rrset(d, LDNS_RR_TYPE_DS);
|
|
del_empty_term(z, d, name, len, labs);
|
|
}
|
|
lock_rw_unlock(&z->lock);
|
|
}
|
|
lock_rw_unlock(&zones->lock);
|
|
|
|
/* remove other types */
|
|
lock_rw_rdlock(&zones->lock);
|
|
z = local_zones_lookup(zones, name, len, labs, dclass, 0);
|
|
if(!z) {
|
|
/* no such zone, we're done */
|
|
lock_rw_unlock(&zones->lock);
|
|
return;
|
|
}
|
|
lock_rw_wrlock(&z->lock);
|
|
lock_rw_unlock(&zones->lock);
|
|
|
|
/* find the domain */
|
|
d = local_zone_find_data(z, name, len, labs);
|
|
if(d) {
|
|
/* no memory recycling for zone deletions ... */
|
|
d->rrsets = NULL;
|
|
/* did we delete the soa record ? */
|
|
if(query_dname_compare(d->name, z->name) == 0) {
|
|
z->soa = NULL;
|
|
z->soa_negative = NULL;
|
|
}
|
|
|
|
/* cleanup the empty nonterminals for this name */
|
|
del_empty_term(z, d, name, len, labs);
|
|
}
|
|
|
|
lock_rw_unlock(&z->lock);
|
|
}
|