mirror of
https://github.com/samba-team/samba.git
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9394e14626
Signed-off-by: Garming Sam <garming@catalyst.net.nz> Reviewed-by: Andrew Bartlett <abartlet@samba.org>
206 lines
5.2 KiB
C
206 lines
5.2 KiB
C
/*
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Unix SMB/CIFS implementation.
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DNS server utils
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Copyright (C) 2010 Kai Blin <kai@samba.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "includes.h"
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#include "libcli/util/ntstatus.h"
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#include "libcli/util/werror.h"
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#include "librpc/ndr/libndr.h"
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#include "librpc/gen_ndr/ndr_dns.h"
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#include "librpc/gen_ndr/ndr_dnsp.h"
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#include <ldb.h>
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#include "dsdb/samdb/samdb.h"
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#include "dsdb/common/util.h"
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#include "dns_server/dns_server.h"
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#undef DBGC_CLASS
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#define DBGC_CLASS DBGC_DNS
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/* Names are equal if they match and there's nothing left over */
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bool dns_name_equal(const char *name1, const char *name2)
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{
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size_t host_part_len;
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bool ret = dns_name_match(name1, name2, &host_part_len);
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return ret && (host_part_len == 0);
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}
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/*
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see if two dns records match
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*/
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bool dns_records_match(struct dnsp_DnssrvRpcRecord *rec1,
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struct dnsp_DnssrvRpcRecord *rec2)
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{
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bool status;
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int i;
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if (rec1->wType != rec2->wType) {
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return false;
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}
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/* see if the data matches */
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switch (rec1->wType) {
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case DNS_TYPE_A:
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return strcmp(rec1->data.ipv4, rec2->data.ipv4) == 0;
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case DNS_TYPE_AAAA:
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return strcmp(rec1->data.ipv6, rec2->data.ipv6) == 0;
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case DNS_TYPE_CNAME:
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return dns_name_equal(rec1->data.cname, rec2->data.cname);
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case DNS_TYPE_TXT:
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if (rec1->data.txt.count != rec2->data.txt.count) {
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return false;
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}
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status = true;
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for (i=0; i<rec1->data.txt.count; i++) {
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status = status && (strcmp(rec1->data.txt.str[i],
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rec2->data.txt.str[i]) == 0);
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}
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return status;
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case DNS_TYPE_PTR:
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return strcmp(rec1->data.ptr, rec2->data.ptr) == 0;
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case DNS_TYPE_NS:
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return dns_name_equal(rec1->data.ns, rec2->data.ns);
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case DNS_TYPE_SRV:
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return rec1->data.srv.wPriority == rec2->data.srv.wPriority &&
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rec1->data.srv.wWeight == rec2->data.srv.wWeight &&
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rec1->data.srv.wPort == rec2->data.srv.wPort &&
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dns_name_equal(rec1->data.srv.nameTarget, rec2->data.srv.nameTarget);
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case DNS_TYPE_MX:
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return rec1->data.mx.wPriority == rec2->data.mx.wPriority &&
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dns_name_equal(rec1->data.mx.nameTarget, rec2->data.mx.nameTarget);
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case DNS_TYPE_HINFO:
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return strcmp(rec1->data.hinfo.cpu, rec2->data.hinfo.cpu) == 0 &&
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strcmp(rec1->data.hinfo.os, rec2->data.hinfo.os) == 0;
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case DNS_TYPE_SOA:
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return dns_name_equal(rec1->data.soa.mname, rec2->data.soa.mname) &&
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dns_name_equal(rec1->data.soa.rname, rec2->data.soa.rname) &&
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rec1->data.soa.serial == rec2->data.soa.serial &&
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rec1->data.soa.refresh == rec2->data.soa.refresh &&
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rec1->data.soa.retry == rec2->data.soa.retry &&
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rec1->data.soa.expire == rec2->data.soa.expire &&
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rec1->data.soa.minimum == rec2->data.soa.minimum;
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default:
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break;
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}
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return false;
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}
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WERROR dns_lookup_records(struct dns_server *dns,
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TALLOC_CTX *mem_ctx,
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struct ldb_dn *dn,
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struct dnsp_DnssrvRpcRecord **records,
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uint16_t *rec_count)
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{
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return dns_common_lookup(dns->samdb, mem_ctx, dn,
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records, rec_count, NULL);
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}
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WERROR dns_replace_records(struct dns_server *dns,
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TALLOC_CTX *mem_ctx,
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struct ldb_dn *dn,
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bool needs_add,
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struct dnsp_DnssrvRpcRecord *records,
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uint16_t rec_count)
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{
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/* TODO: Autogenerate this somehow */
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uint32_t dwSerial = 110;
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return dns_common_replace(dns->samdb, mem_ctx, dn,
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needs_add, dwSerial, records, rec_count);
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}
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bool dns_authoritative_for_zone(struct dns_server *dns,
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const char *name)
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{
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const struct dns_server_zone *z;
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size_t host_part_len = 0;
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if (name == NULL) {
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return false;
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}
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if (strcmp(name, "") == 0) {
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return true;
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}
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for (z = dns->zones; z != NULL; z = z->next) {
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bool match;
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match = dns_name_match(z->name, name, &host_part_len);
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if (match) {
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break;
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}
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}
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if (z == NULL) {
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return false;
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}
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return true;
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}
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const char *dns_get_authoritative_zone(struct dns_server *dns,
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const char *name)
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{
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const struct dns_server_zone *z;
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size_t host_part_len = 0;
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for (z = dns->zones; z != NULL; z = z->next) {
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bool match;
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match = dns_name_match(z->name, name, &host_part_len);
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if (match) {
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return z->name;
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}
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}
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return NULL;
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}
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WERROR dns_name2dn(struct dns_server *dns,
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TALLOC_CTX *mem_ctx,
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const char *name,
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struct ldb_dn **dn)
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{
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return dns_common_name2dn(dns->samdb, dns->zones,
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mem_ctx, name, dn);
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}
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WERROR dns_generate_options(struct dns_server *dns,
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TALLOC_CTX *mem_ctx,
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struct dns_res_rec **options)
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{
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struct dns_res_rec *o;
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o = talloc_zero(mem_ctx, struct dns_res_rec);
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if (o == NULL) {
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return WERR_NOMEM;
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}
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o->name = NULL;
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o->rr_type = DNS_QTYPE_OPT;
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/* This is ugly, but RFC2671 wants the payload size in this field */
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o->rr_class = (enum dns_qclass) dns->max_payload;
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o->ttl = 0;
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o->length = 0;
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*options = o;
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return WERR_OK;
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}
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