mirror of
https://github.com/samba-team/samba.git
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2b2ff12e70
In order to detect an value overflow error during the string to integer conversion with strtoul/strtoull, the errno variable must be set to zero before the execution and checked after the conversion is performed. This is achieved by using the wrapper function strtoul_err and strtoull_err. Signed-off-by: Swen Schillig <swen@linux.ibm.com> Reviewed-by: Ralph Böhme <slow@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
2055 lines
50 KiB
C
2055 lines
50 KiB
C
/*
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Unix SMB/CIFS implementation.
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bind9 dlz driver for Samba
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Copyright (C) 2010 Andrew Tridgell
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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 "talloc.h"
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#include "param/param.h"
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#include "lib/events/events.h"
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#include "dsdb/samdb/samdb.h"
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#include "dsdb/common/util.h"
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#include "auth/auth.h"
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#include "auth/session.h"
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#include "auth/gensec/gensec.h"
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#include "librpc/gen_ndr/security.h"
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#include "auth/credentials/credentials.h"
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#include "system/kerberos.h"
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#include "auth/kerberos/kerberos.h"
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#include "gen_ndr/ndr_dnsp.h"
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#include "gen_ndr/server_id.h"
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#include "messaging/messaging.h"
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#include <popt.h>
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#include "lib/util/dlinklist.h"
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#include "dlz_minimal.h"
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#include "dnsserver_common.h"
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struct b9_options {
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const char *url;
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const char *debug;
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};
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struct b9_zone {
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char *name;
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struct b9_zone *prev, *next;
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};
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struct dlz_bind9_data {
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struct b9_options options;
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struct ldb_context *samdb;
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struct tevent_context *ev_ctx;
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struct loadparm_context *lp;
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int *transaction_token;
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uint32_t soa_serial;
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struct b9_zone *zonelist;
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/* Used for dynamic update */
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struct smb_krb5_context *smb_krb5_ctx;
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struct auth4_context *auth_context;
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struct auth_session_info *session_info;
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char *update_name;
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/* helper functions from the dlz_dlopen driver */
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log_t *log;
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dns_sdlz_putrr_t *putrr;
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dns_sdlz_putnamedrr_t *putnamedrr;
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dns_dlz_writeablezone_t *writeable_zone;
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};
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static struct dlz_bind9_data *dlz_bind9_state = NULL;
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static int dlz_bind9_state_ref_count = 0;
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static const char *zone_prefixes[] = {
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"CN=MicrosoftDNS,DC=DomainDnsZones",
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"CN=MicrosoftDNS,DC=ForestDnsZones",
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"CN=MicrosoftDNS,CN=System",
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NULL
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};
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/*
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return the version of the API
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*/
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_PUBLIC_ int dlz_version(unsigned int *flags)
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{
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return DLZ_DLOPEN_VERSION;
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}
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/*
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remember a helper function from the bind9 dlz_dlopen driver
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*/
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static void b9_add_helper(struct dlz_bind9_data *state, const char *helper_name, void *ptr)
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{
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if (strcmp(helper_name, "log") == 0) {
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state->log = ptr;
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}
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if (strcmp(helper_name, "putrr") == 0) {
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state->putrr = ptr;
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}
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if (strcmp(helper_name, "putnamedrr") == 0) {
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state->putnamedrr = ptr;
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}
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if (strcmp(helper_name, "writeable_zone") == 0) {
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state->writeable_zone = ptr;
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}
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}
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/*
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* Add a trailing '.' if it's missing
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*/
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static const char *b9_format_fqdn(TALLOC_CTX *mem_ctx, const char *str)
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{
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size_t len;
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const char *tmp;
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if (str == NULL || str[0] == '\0') {
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return str;
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}
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len = strlen(str);
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if (str[len-1] != '.') {
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tmp = talloc_asprintf(mem_ctx, "%s.", str);
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} else {
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tmp = str;
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}
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return tmp;
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}
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/*
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format a record for bind9
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*/
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static bool b9_format(struct dlz_bind9_data *state,
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TALLOC_CTX *mem_ctx,
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struct dnsp_DnssrvRpcRecord *rec,
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const char **type, const char **data)
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{
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uint32_t i;
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char *tmp;
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const char *fqdn;
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switch (rec->wType) {
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case DNS_TYPE_A:
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*type = "a";
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*data = rec->data.ipv4;
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break;
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case DNS_TYPE_AAAA:
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*type = "aaaa";
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*data = rec->data.ipv6;
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break;
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case DNS_TYPE_CNAME:
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*type = "cname";
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*data = b9_format_fqdn(mem_ctx, rec->data.cname);
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break;
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case DNS_TYPE_TXT:
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*type = "txt";
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tmp = talloc_asprintf(mem_ctx, "\"%s\"", rec->data.txt.str[0]);
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for (i=1; i<rec->data.txt.count; i++) {
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tmp = talloc_asprintf_append(tmp, " \"%s\"", rec->data.txt.str[i]);
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}
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*data = tmp;
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break;
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case DNS_TYPE_PTR:
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*type = "ptr";
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*data = b9_format_fqdn(mem_ctx, rec->data.ptr);
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break;
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case DNS_TYPE_SRV:
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*type = "srv";
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fqdn = b9_format_fqdn(mem_ctx, rec->data.srv.nameTarget);
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if (fqdn == NULL) {
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return false;
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}
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*data = talloc_asprintf(mem_ctx, "%u %u %u %s",
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rec->data.srv.wPriority,
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rec->data.srv.wWeight,
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rec->data.srv.wPort,
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fqdn);
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break;
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case DNS_TYPE_MX:
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*type = "mx";
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fqdn = b9_format_fqdn(mem_ctx, rec->data.mx.nameTarget);
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if (fqdn == NULL) {
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return false;
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}
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*data = talloc_asprintf(mem_ctx, "%u %s",
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rec->data.mx.wPriority, fqdn);
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break;
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case DNS_TYPE_HINFO:
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*type = "hinfo";
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*data = talloc_asprintf(mem_ctx, "%s %s",
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rec->data.hinfo.cpu,
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rec->data.hinfo.os);
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break;
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case DNS_TYPE_NS:
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*type = "ns";
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*data = b9_format_fqdn(mem_ctx, rec->data.ns);
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break;
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case DNS_TYPE_SOA: {
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const char *mname;
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*type = "soa";
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/* we need to fake the authoritative nameserver to
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* point at ourselves. This is how AD DNS servers
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* force clients to send updates to the right local DC
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*/
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mname = talloc_asprintf(mem_ctx, "%s.%s.",
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lpcfg_netbios_name(state->lp),
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lpcfg_dnsdomain(state->lp));
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if (mname == NULL) {
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return false;
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}
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mname = strlower_talloc(mem_ctx, mname);
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if (mname == NULL) {
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return false;
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}
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fqdn = b9_format_fqdn(mem_ctx, rec->data.soa.rname);
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if (fqdn == NULL) {
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return false;
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}
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state->soa_serial = rec->data.soa.serial;
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*data = talloc_asprintf(mem_ctx, "%s %s %u %u %u %u %u",
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mname, fqdn,
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rec->data.soa.serial,
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rec->data.soa.refresh,
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rec->data.soa.retry,
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rec->data.soa.expire,
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rec->data.soa.minimum);
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break;
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}
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default:
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state->log(ISC_LOG_ERROR, "samba_dlz b9_format: unhandled record type %u",
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rec->wType);
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return false;
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}
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return true;
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}
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static const struct {
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enum dns_record_type dns_type;
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const char *typestr;
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bool single_valued;
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} dns_typemap[] = {
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{ DNS_TYPE_A, "A" , false},
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{ DNS_TYPE_AAAA, "AAAA" , false},
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{ DNS_TYPE_CNAME, "CNAME" , true},
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{ DNS_TYPE_TXT, "TXT" , false},
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{ DNS_TYPE_PTR, "PTR" , false},
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{ DNS_TYPE_SRV, "SRV" , false},
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{ DNS_TYPE_MX, "MX" , false},
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{ DNS_TYPE_HINFO, "HINFO" , false},
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{ DNS_TYPE_NS, "NS" , false},
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{ DNS_TYPE_SOA, "SOA" , true},
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};
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/*
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see if a DNS type is single valued
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*/
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static bool b9_single_valued(enum dns_record_type dns_type)
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{
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int i;
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for (i=0; i<ARRAY_SIZE(dns_typemap); i++) {
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if (dns_typemap[i].dns_type == dns_type) {
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return dns_typemap[i].single_valued;
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}
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}
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return false;
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}
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/*
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see if a DNS type is single valued
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*/
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static bool b9_dns_type(const char *type, enum dns_record_type *dtype)
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{
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int i;
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for (i=0; i<ARRAY_SIZE(dns_typemap); i++) {
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if (strcasecmp(dns_typemap[i].typestr, type) == 0) {
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*dtype = dns_typemap[i].dns_type;
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return true;
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}
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}
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return false;
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}
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#define DNS_PARSE_STR(ret, str, sep, saveptr) do { \
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(ret) = strtok_r(str, sep, &saveptr); \
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if ((ret) == NULL) return false; \
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} while (0)
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#define DNS_PARSE_UINT(ret, str, sep, saveptr) do { \
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char *istr = strtok_r(str, sep, &saveptr); \
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int error = 0;\
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if ((istr) == NULL) return false; \
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(ret) = strtoul_err(istr, NULL, 10, &error); \
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if (error != 0) {\
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return false;\
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}\
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} while (0)
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/*
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parse a record from bind9
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*/
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static bool b9_parse(struct dlz_bind9_data *state,
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const char *rdatastr,
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struct dnsp_DnssrvRpcRecord *rec)
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{
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char *full_name, *dclass, *type;
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char *str, *tmp, *saveptr=NULL;
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int i;
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str = talloc_strdup(rec, rdatastr);
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if (str == NULL) {
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return false;
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}
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/* parse the SDLZ string form */
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DNS_PARSE_STR(full_name, str, "\t", saveptr);
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DNS_PARSE_UINT(rec->dwTtlSeconds, NULL, "\t", saveptr);
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DNS_PARSE_STR(dclass, NULL, "\t", saveptr);
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DNS_PARSE_STR(type, NULL, "\t", saveptr);
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/* construct the record */
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for (i=0; i<ARRAY_SIZE(dns_typemap); i++) {
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if (strcasecmp(type, dns_typemap[i].typestr) == 0) {
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rec->wType = dns_typemap[i].dns_type;
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break;
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}
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}
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if (i == ARRAY_SIZE(dns_typemap)) {
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state->log(ISC_LOG_ERROR, "samba_dlz: unsupported record type '%s' for '%s'",
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type, full_name);
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return false;
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}
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switch (rec->wType) {
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case DNS_TYPE_A:
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DNS_PARSE_STR(rec->data.ipv4, NULL, " ", saveptr);
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break;
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case DNS_TYPE_AAAA:
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DNS_PARSE_STR(rec->data.ipv6, NULL, " ", saveptr);
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break;
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case DNS_TYPE_CNAME:
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DNS_PARSE_STR(rec->data.cname, NULL, " ", saveptr);
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break;
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case DNS_TYPE_TXT:
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rec->data.txt.count = 0;
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rec->data.txt.str = talloc_array(rec, const char *, rec->data.txt.count);
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tmp = strtok_r(NULL, "\t", &saveptr);
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while (tmp) {
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rec->data.txt.str = talloc_realloc(rec, rec->data.txt.str, const char *,
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rec->data.txt.count+1);
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if (tmp[0] == '"') {
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/* Strip quotes */
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rec->data.txt.str[rec->data.txt.count] = talloc_strndup(rec, &tmp[1], strlen(tmp)-2);
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} else {
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rec->data.txt.str[rec->data.txt.count] = talloc_strdup(rec, tmp);
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}
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rec->data.txt.count++;
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tmp = strtok_r(NULL, " ", &saveptr);
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}
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break;
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case DNS_TYPE_PTR:
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DNS_PARSE_STR(rec->data.ptr, NULL, " ", saveptr);
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break;
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case DNS_TYPE_SRV:
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DNS_PARSE_UINT(rec->data.srv.wPriority, NULL, " ", saveptr);
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DNS_PARSE_UINT(rec->data.srv.wWeight, NULL, " ", saveptr);
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DNS_PARSE_UINT(rec->data.srv.wPort, NULL, " ", saveptr);
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DNS_PARSE_STR(rec->data.srv.nameTarget, NULL, " ", saveptr);
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break;
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case DNS_TYPE_MX:
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DNS_PARSE_UINT(rec->data.mx.wPriority, NULL, " ", saveptr);
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DNS_PARSE_STR(rec->data.mx.nameTarget, NULL, " ", saveptr);
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break;
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case DNS_TYPE_HINFO:
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DNS_PARSE_STR(rec->data.hinfo.cpu, NULL, " ", saveptr);
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DNS_PARSE_STR(rec->data.hinfo.os, NULL, " ", saveptr);
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break;
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case DNS_TYPE_NS:
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DNS_PARSE_STR(rec->data.ns, NULL, " ", saveptr);
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break;
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case DNS_TYPE_SOA:
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DNS_PARSE_STR(rec->data.soa.mname, NULL, " ", saveptr);
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DNS_PARSE_STR(rec->data.soa.rname, NULL, " ", saveptr);
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DNS_PARSE_UINT(rec->data.soa.serial, NULL, " ", saveptr);
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DNS_PARSE_UINT(rec->data.soa.refresh, NULL, " ", saveptr);
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DNS_PARSE_UINT(rec->data.soa.retry, NULL, " ", saveptr);
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DNS_PARSE_UINT(rec->data.soa.expire, NULL, " ", saveptr);
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DNS_PARSE_UINT(rec->data.soa.minimum, NULL, " ", saveptr);
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break;
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default:
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state->log(ISC_LOG_ERROR, "samba_dlz b9_parse: unhandled record type %u",
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rec->wType);
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return false;
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}
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/* we should be at the end of the buffer now */
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if (strtok_r(NULL, "\t ", &saveptr) != NULL) {
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state->log(ISC_LOG_ERROR, "samba_dlz b9_parse: unexpected data at end of string for '%s'",
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rdatastr);
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return false;
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}
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return true;
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}
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|
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/*
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send a resource record to bind9
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*/
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static isc_result_t b9_putrr(struct dlz_bind9_data *state,
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void *handle, struct dnsp_DnssrvRpcRecord *rec,
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const char **types)
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{
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isc_result_t result;
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const char *type, *data;
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TALLOC_CTX *tmp_ctx = talloc_new(state);
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if (!b9_format(state, tmp_ctx, rec, &type, &data)) {
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return ISC_R_FAILURE;
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}
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if (data == NULL) {
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talloc_free(tmp_ctx);
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return ISC_R_NOMEMORY;
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}
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if (types) {
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int i;
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for (i=0; types[i]; i++) {
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if (strcmp(types[i], type) == 0) break;
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}
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if (types[i] == NULL) {
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/* skip it */
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return ISC_R_SUCCESS;
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}
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}
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result = state->putrr(handle, type, rec->dwTtlSeconds, data);
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if (result != ISC_R_SUCCESS) {
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state->log(ISC_LOG_ERROR, "Failed to put rr");
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}
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talloc_free(tmp_ctx);
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return result;
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}
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/*
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send a named resource record to bind9
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*/
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static isc_result_t b9_putnamedrr(struct dlz_bind9_data *state,
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void *handle, const char *name,
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struct dnsp_DnssrvRpcRecord *rec)
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{
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isc_result_t result;
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const char *type, *data;
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TALLOC_CTX *tmp_ctx = talloc_new(state);
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if (!b9_format(state, tmp_ctx, rec, &type, &data)) {
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return ISC_R_FAILURE;
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}
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if (data == NULL) {
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talloc_free(tmp_ctx);
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return ISC_R_NOMEMORY;
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}
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result = state->putnamedrr(handle, name, type, rec->dwTtlSeconds, data);
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if (result != ISC_R_SUCCESS) {
|
|
state->log(ISC_LOG_ERROR, "Failed to put named rr '%s'", name);
|
|
}
|
|
talloc_free(tmp_ctx);
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
parse options
|
|
*/
|
|
static isc_result_t parse_options(struct dlz_bind9_data *state,
|
|
unsigned int argc, const char **argv,
|
|
struct b9_options *options)
|
|
{
|
|
int opt;
|
|
poptContext pc;
|
|
struct poptOption long_options[] = {
|
|
{ "url", 'H', POPT_ARG_STRING, &options->url, 0, "database URL", "URL" },
|
|
{ "debug", 'd', POPT_ARG_STRING, &options->debug, 0, "debug level", "DEBUG" },
|
|
{ NULL }
|
|
};
|
|
|
|
pc = poptGetContext("dlz_bind9", argc, argv, long_options,
|
|
POPT_CONTEXT_KEEP_FIRST);
|
|
while ((opt = poptGetNextOpt(pc)) != -1) {
|
|
switch (opt) {
|
|
default:
|
|
state->log(ISC_LOG_ERROR, "dlz_bind9: Invalid option %s: %s",
|
|
poptBadOption(pc, 0), poptStrerror(opt));
|
|
return ISC_R_FAILURE;
|
|
}
|
|
}
|
|
|
|
return ISC_R_SUCCESS;
|
|
}
|
|
|
|
|
|
/*
|
|
* Create session info from PAC
|
|
* This is called as auth_context->generate_session_info_pac()
|
|
*/
|
|
static NTSTATUS b9_generate_session_info_pac(struct auth4_context *auth_context,
|
|
TALLOC_CTX *mem_ctx,
|
|
struct smb_krb5_context *smb_krb5_context,
|
|
DATA_BLOB *pac_blob,
|
|
const char *principal_name,
|
|
const struct tsocket_address *remote_addr,
|
|
uint32_t session_info_flags,
|
|
struct auth_session_info **session_info)
|
|
{
|
|
NTSTATUS status;
|
|
struct auth_user_info_dc *user_info_dc;
|
|
TALLOC_CTX *tmp_ctx;
|
|
|
|
tmp_ctx = talloc_new(mem_ctx);
|
|
NT_STATUS_HAVE_NO_MEMORY(tmp_ctx);
|
|
|
|
status = kerberos_pac_blob_to_user_info_dc(tmp_ctx,
|
|
*pac_blob,
|
|
smb_krb5_context->krb5_context,
|
|
&user_info_dc,
|
|
NULL,
|
|
NULL);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
talloc_free(tmp_ctx);
|
|
return status;
|
|
}
|
|
|
|
if (user_info_dc->info->authenticated) {
|
|
session_info_flags |= AUTH_SESSION_INFO_AUTHENTICATED;
|
|
}
|
|
|
|
session_info_flags |= AUTH_SESSION_INFO_SIMPLE_PRIVILEGES;
|
|
|
|
status = auth_generate_session_info(mem_ctx, NULL, NULL, user_info_dc,
|
|
session_info_flags, session_info);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
talloc_free(tmp_ctx);
|
|
return status;
|
|
}
|
|
|
|
talloc_free(tmp_ctx);
|
|
return status;
|
|
}
|
|
|
|
/* Callback for the DEBUG() system, to catch the remaining messages */
|
|
static void b9_debug(void *private_ptr, int msg_level, const char *msg)
|
|
{
|
|
static const int isc_log_map[] = {
|
|
ISC_LOG_CRITICAL, /* 0 */
|
|
ISC_LOG_ERROR, /* 1 */
|
|
ISC_LOG_WARNING, /* 2 */
|
|
ISC_LOG_NOTICE /* 3 */
|
|
};
|
|
struct dlz_bind9_data *state = private_ptr;
|
|
int isc_log_level;
|
|
|
|
if (msg_level >= ARRAY_SIZE(isc_log_map) || msg_level < 0) {
|
|
isc_log_level = ISC_LOG_INFO;
|
|
} else {
|
|
isc_log_level = isc_log_map[msg_level];
|
|
}
|
|
state->log(isc_log_level, "samba_dlz: %s", msg);
|
|
}
|
|
|
|
static int dlz_state_debug_unregister(struct dlz_bind9_data *state)
|
|
{
|
|
/* Stop logging (to the bind9 logs) */
|
|
debug_set_callback(NULL, NULL);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
called to initialise the driver
|
|
*/
|
|
_PUBLIC_ isc_result_t dlz_create(const char *dlzname,
|
|
unsigned int argc, const char **argv,
|
|
void **dbdata, ...)
|
|
{
|
|
struct dlz_bind9_data *state;
|
|
const char *helper_name;
|
|
va_list ap;
|
|
isc_result_t result;
|
|
struct ldb_dn *dn;
|
|
NTSTATUS nt_status;
|
|
int ret;
|
|
char *errstring = NULL;
|
|
|
|
if (dlz_bind9_state != NULL) {
|
|
dlz_bind9_state->log(ISC_LOG_ERROR,
|
|
"samba_dlz: dlz_create ignored, #refs=%d",
|
|
dlz_bind9_state_ref_count);
|
|
*dbdata = dlz_bind9_state;
|
|
dlz_bind9_state_ref_count++;
|
|
return ISC_R_SUCCESS;
|
|
}
|
|
|
|
state = talloc_zero(NULL, struct dlz_bind9_data);
|
|
if (state == NULL) {
|
|
return ISC_R_NOMEMORY;
|
|
}
|
|
|
|
talloc_set_destructor(state, dlz_state_debug_unregister);
|
|
|
|
/* fill in the helper functions */
|
|
va_start(ap, dbdata);
|
|
while ((helper_name = va_arg(ap, const char *)) != NULL) {
|
|
b9_add_helper(state, helper_name, va_arg(ap, void*));
|
|
}
|
|
va_end(ap);
|
|
|
|
/* Do not install samba signal handlers */
|
|
fault_setup_disable();
|
|
|
|
/* Start logging (to the bind9 logs) */
|
|
debug_set_callback(state, b9_debug);
|
|
|
|
state->ev_ctx = s4_event_context_init(state);
|
|
if (state->ev_ctx == NULL) {
|
|
result = ISC_R_NOMEMORY;
|
|
goto failed;
|
|
}
|
|
|
|
result = parse_options(state, argc, argv, &state->options);
|
|
if (result != ISC_R_SUCCESS) {
|
|
goto failed;
|
|
}
|
|
|
|
state->lp = loadparm_init_global(true);
|
|
if (state->lp == NULL) {
|
|
result = ISC_R_NOMEMORY;
|
|
goto failed;
|
|
}
|
|
|
|
if (state->options.debug) {
|
|
lpcfg_do_global_parameter(state->lp, "log level", state->options.debug);
|
|
} else {
|
|
lpcfg_do_global_parameter(state->lp, "log level", "0");
|
|
}
|
|
|
|
if (smb_krb5_init_context(state, state->lp, &state->smb_krb5_ctx) != 0) {
|
|
result = ISC_R_NOMEMORY;
|
|
goto failed;
|
|
}
|
|
|
|
nt_status = gensec_init();
|
|
if (!NT_STATUS_IS_OK(nt_status)) {
|
|
result = ISC_R_NOMEMORY;
|
|
goto failed;
|
|
}
|
|
|
|
state->auth_context = talloc_zero(state, struct auth4_context);
|
|
if (state->auth_context == NULL) {
|
|
result = ISC_R_NOMEMORY;
|
|
goto failed;
|
|
}
|
|
|
|
if (state->options.url == NULL) {
|
|
state->options.url = talloc_asprintf(state,
|
|
"%s/dns/sam.ldb",
|
|
lpcfg_binddns_dir(state->lp));
|
|
if (state->options.url == NULL) {
|
|
result = ISC_R_NOMEMORY;
|
|
goto failed;
|
|
}
|
|
|
|
if (!file_exist(state->options.url)) {
|
|
state->options.url = talloc_asprintf(state,
|
|
"%s/dns/sam.ldb",
|
|
lpcfg_private_dir(state->lp));
|
|
if (state->options.url == NULL) {
|
|
result = ISC_R_NOMEMORY;
|
|
goto failed;
|
|
}
|
|
}
|
|
}
|
|
|
|
ret = samdb_connect_url(state,
|
|
state->ev_ctx,
|
|
state->lp,
|
|
system_session(state->lp),
|
|
0,
|
|
state->options.url,
|
|
NULL,
|
|
&state->samdb,
|
|
&errstring);
|
|
if (ret != LDB_SUCCESS) {
|
|
state->log(ISC_LOG_ERROR,
|
|
"samba_dlz: Failed to connect to %s: %s",
|
|
errstring, ldb_strerror(ret));
|
|
result = ISC_R_FAILURE;
|
|
goto failed;
|
|
}
|
|
|
|
dn = ldb_get_default_basedn(state->samdb);
|
|
if (dn == NULL) {
|
|
state->log(ISC_LOG_ERROR, "samba_dlz: Unable to get basedn for %s - %s",
|
|
state->options.url, ldb_errstring(state->samdb));
|
|
result = ISC_R_FAILURE;
|
|
goto failed;
|
|
}
|
|
|
|
state->log(ISC_LOG_INFO, "samba_dlz: started for DN %s",
|
|
ldb_dn_get_linearized(dn));
|
|
|
|
state->auth_context->event_ctx = state->ev_ctx;
|
|
state->auth_context->lp_ctx = state->lp;
|
|
state->auth_context->sam_ctx = state->samdb;
|
|
state->auth_context->generate_session_info_pac = b9_generate_session_info_pac;
|
|
|
|
*dbdata = state;
|
|
dlz_bind9_state = state;
|
|
dlz_bind9_state_ref_count++;
|
|
|
|
return ISC_R_SUCCESS;
|
|
|
|
failed:
|
|
state->log(ISC_LOG_INFO,
|
|
"samba_dlz: FAILED dlz_create call result=%d #refs=%d",
|
|
result,
|
|
dlz_bind9_state_ref_count);
|
|
talloc_free(state);
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
shutdown the backend
|
|
*/
|
|
_PUBLIC_ void dlz_destroy(void *dbdata)
|
|
{
|
|
struct dlz_bind9_data *state = talloc_get_type_abort(dbdata, struct dlz_bind9_data);
|
|
|
|
dlz_bind9_state_ref_count--;
|
|
if (dlz_bind9_state_ref_count == 0) {
|
|
state->log(ISC_LOG_INFO, "samba_dlz: shutting down");
|
|
talloc_unlink(state, state->samdb);
|
|
talloc_free(state);
|
|
dlz_bind9_state = NULL;
|
|
} else {
|
|
state->log(ISC_LOG_INFO,
|
|
"samba_dlz: dlz_destroy called. %d refs remaining.",
|
|
dlz_bind9_state_ref_count);
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
return the base DN for a zone
|
|
*/
|
|
static isc_result_t b9_find_zone_dn(struct dlz_bind9_data *state, const char *zone_name,
|
|
TALLOC_CTX *mem_ctx, struct ldb_dn **zone_dn)
|
|
{
|
|
int ret;
|
|
TALLOC_CTX *tmp_ctx = talloc_new(state);
|
|
const char *attrs[] = { NULL };
|
|
int i;
|
|
|
|
for (i=0; zone_prefixes[i]; i++) {
|
|
const char *casefold;
|
|
struct ldb_dn *dn;
|
|
struct ldb_result *res;
|
|
struct ldb_val zone_name_val
|
|
= data_blob_string_const(zone_name);
|
|
|
|
dn = ldb_dn_copy(tmp_ctx, ldb_get_default_basedn(state->samdb));
|
|
if (dn == NULL) {
|
|
talloc_free(tmp_ctx);
|
|
return ISC_R_NOMEMORY;
|
|
}
|
|
|
|
/*
|
|
* This dance ensures that it is not possible to put
|
|
* (eg) an extra DC=x, into the DNS name being
|
|
* queried
|
|
*/
|
|
|
|
if (!ldb_dn_add_child_fmt(dn,
|
|
"DC=X,%s",
|
|
zone_prefixes[i])) {
|
|
talloc_free(tmp_ctx);
|
|
return ISC_R_NOMEMORY;
|
|
}
|
|
|
|
ret = ldb_dn_set_component(dn,
|
|
0,
|
|
"DC",
|
|
zone_name_val);
|
|
if (ret != LDB_SUCCESS) {
|
|
talloc_free(tmp_ctx);
|
|
return ISC_R_NOMEMORY;
|
|
}
|
|
|
|
/*
|
|
* Check if this is a plausibly valid DN early
|
|
* (time spent here will be saved during the
|
|
* search due to an internal cache)
|
|
*/
|
|
casefold = ldb_dn_get_casefold(dn);
|
|
|
|
if (casefold == NULL) {
|
|
talloc_free(tmp_ctx);
|
|
return ISC_R_NOTFOUND;
|
|
}
|
|
|
|
ret = ldb_search(state->samdb, tmp_ctx, &res, dn, LDB_SCOPE_BASE, attrs, "objectClass=dnsZone");
|
|
if (ret == LDB_SUCCESS) {
|
|
if (zone_dn != NULL) {
|
|
*zone_dn = talloc_steal(mem_ctx, dn);
|
|
}
|
|
talloc_free(tmp_ctx);
|
|
return ISC_R_SUCCESS;
|
|
}
|
|
talloc_free(dn);
|
|
}
|
|
|
|
talloc_free(tmp_ctx);
|
|
return ISC_R_NOTFOUND;
|
|
}
|
|
|
|
|
|
/*
|
|
return the DN for a name. The record does not need to exist, but the
|
|
zone must exist
|
|
*/
|
|
static isc_result_t b9_find_name_dn(struct dlz_bind9_data *state, const char *name,
|
|
TALLOC_CTX *mem_ctx, struct ldb_dn **dn)
|
|
{
|
|
const char *p;
|
|
|
|
/* work through the name piece by piece, until we find a zone */
|
|
for (p=name; p; ) {
|
|
isc_result_t result;
|
|
result = b9_find_zone_dn(state, p, mem_ctx, dn);
|
|
if (result == ISC_R_SUCCESS) {
|
|
const char *casefold;
|
|
|
|
/* we found a zone, now extend the DN to get
|
|
* the full DN
|
|
*/
|
|
bool ret;
|
|
if (p == name) {
|
|
ret = ldb_dn_add_child_fmt(*dn, "DC=@");
|
|
if (ret == false) {
|
|
talloc_free(*dn);
|
|
return ISC_R_NOMEMORY;
|
|
}
|
|
} else {
|
|
struct ldb_val name_val
|
|
= data_blob_const(name,
|
|
(int)(p-name)-1);
|
|
|
|
if (!ldb_dn_add_child_val(*dn,
|
|
"DC",
|
|
name_val)) {
|
|
talloc_free(*dn);
|
|
return ISC_R_NOMEMORY;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Check if this is a plausibly valid DN early
|
|
* (time spent here will be saved during the
|
|
* search due to an internal cache)
|
|
*/
|
|
casefold = ldb_dn_get_casefold(*dn);
|
|
|
|
if (casefold == NULL) {
|
|
return ISC_R_NOTFOUND;
|
|
}
|
|
|
|
return ISC_R_SUCCESS;
|
|
}
|
|
p = strchr(p, '.');
|
|
if (p == NULL) {
|
|
break;
|
|
}
|
|
p++;
|
|
}
|
|
return ISC_R_NOTFOUND;
|
|
}
|
|
|
|
|
|
/*
|
|
see if we handle a given zone
|
|
*/
|
|
#if DLZ_DLOPEN_VERSION < 3
|
|
_PUBLIC_ isc_result_t dlz_findzonedb(void *dbdata, const char *name)
|
|
#else
|
|
_PUBLIC_ isc_result_t dlz_findzonedb(void *dbdata, const char *name,
|
|
dns_clientinfomethods_t *methods,
|
|
dns_clientinfo_t *clientinfo)
|
|
#endif
|
|
{
|
|
struct dlz_bind9_data *state = talloc_get_type_abort(dbdata, struct dlz_bind9_data);
|
|
return b9_find_zone_dn(state, name, NULL, NULL);
|
|
}
|
|
|
|
|
|
/*
|
|
lookup one record
|
|
*/
|
|
static isc_result_t dlz_lookup_types(struct dlz_bind9_data *state,
|
|
const char *zone, const char *name,
|
|
dns_sdlzlookup_t *lookup,
|
|
const char **types)
|
|
{
|
|
TALLOC_CTX *tmp_ctx = talloc_new(state);
|
|
struct ldb_dn *dn;
|
|
WERROR werr = WERR_DNS_ERROR_NAME_DOES_NOT_EXIST;
|
|
struct dnsp_DnssrvRpcRecord *records = NULL;
|
|
uint16_t num_records = 0, i;
|
|
struct ldb_val zone_name_val
|
|
= data_blob_string_const(zone);
|
|
struct ldb_val name_val
|
|
= data_blob_string_const(name);
|
|
|
|
for (i=0; zone_prefixes[i]; i++) {
|
|
int ret;
|
|
const char *casefold;
|
|
dn = ldb_dn_copy(tmp_ctx, ldb_get_default_basedn(state->samdb));
|
|
if (dn == NULL) {
|
|
talloc_free(tmp_ctx);
|
|
return ISC_R_NOMEMORY;
|
|
}
|
|
|
|
/*
|
|
* This dance ensures that it is not possible to put
|
|
* (eg) an extra DC=x, into the DNS name being
|
|
* queried
|
|
*/
|
|
|
|
if (!ldb_dn_add_child_fmt(dn,
|
|
"DC=X,DC=X,%s",
|
|
zone_prefixes[i])) {
|
|
talloc_free(tmp_ctx);
|
|
return ISC_R_NOMEMORY;
|
|
}
|
|
|
|
ret = ldb_dn_set_component(dn,
|
|
1,
|
|
"DC",
|
|
zone_name_val);
|
|
if (ret != LDB_SUCCESS) {
|
|
talloc_free(tmp_ctx);
|
|
return ISC_R_NOMEMORY;
|
|
}
|
|
|
|
ret = ldb_dn_set_component(dn,
|
|
0,
|
|
"DC",
|
|
name_val);
|
|
if (ret != LDB_SUCCESS) {
|
|
talloc_free(tmp_ctx);
|
|
return ISC_R_NOMEMORY;
|
|
}
|
|
|
|
/*
|
|
* Check if this is a plausibly valid DN early
|
|
* (time spent here will be saved during the
|
|
* search due to an internal cache)
|
|
*/
|
|
casefold = ldb_dn_get_casefold(dn);
|
|
|
|
if (casefold == NULL) {
|
|
talloc_free(tmp_ctx);
|
|
return ISC_R_NOTFOUND;
|
|
}
|
|
|
|
werr = dns_common_wildcard_lookup(state->samdb, tmp_ctx, dn,
|
|
&records, &num_records);
|
|
if (W_ERROR_IS_OK(werr)) {
|
|
break;
|
|
}
|
|
}
|
|
if (!W_ERROR_IS_OK(werr)) {
|
|
talloc_free(tmp_ctx);
|
|
return ISC_R_NOTFOUND;
|
|
}
|
|
|
|
for (i=0; i < num_records; i++) {
|
|
isc_result_t result;
|
|
|
|
result = b9_putrr(state, lookup, &records[i], types);
|
|
if (result != ISC_R_SUCCESS) {
|
|
talloc_free(tmp_ctx);
|
|
return result;
|
|
}
|
|
}
|
|
|
|
talloc_free(tmp_ctx);
|
|
return ISC_R_SUCCESS;
|
|
}
|
|
|
|
/*
|
|
lookup one record
|
|
*/
|
|
#if DLZ_DLOPEN_VERSION == 1
|
|
_PUBLIC_ isc_result_t dlz_lookup(const char *zone, const char *name,
|
|
void *dbdata, dns_sdlzlookup_t *lookup)
|
|
#else
|
|
_PUBLIC_ isc_result_t dlz_lookup(const char *zone, const char *name,
|
|
void *dbdata, dns_sdlzlookup_t *lookup,
|
|
dns_clientinfomethods_t *methods,
|
|
dns_clientinfo_t *clientinfo)
|
|
#endif
|
|
{
|
|
struct dlz_bind9_data *state = talloc_get_type_abort(dbdata, struct dlz_bind9_data);
|
|
return dlz_lookup_types(state, zone, name, lookup, NULL);
|
|
}
|
|
|
|
|
|
/*
|
|
see if a zone transfer is allowed
|
|
*/
|
|
_PUBLIC_ isc_result_t dlz_allowzonexfr(void *dbdata, const char *name, const char *client)
|
|
{
|
|
/* just say yes for all our zones for now */
|
|
struct dlz_bind9_data *state = talloc_get_type(
|
|
dbdata, struct dlz_bind9_data);
|
|
return b9_find_zone_dn(state, name, NULL, NULL);
|
|
}
|
|
|
|
/*
|
|
perform a zone transfer
|
|
*/
|
|
_PUBLIC_ isc_result_t dlz_allnodes(const char *zone, void *dbdata,
|
|
dns_sdlzallnodes_t *allnodes)
|
|
{
|
|
struct dlz_bind9_data *state = talloc_get_type_abort(dbdata, struct dlz_bind9_data);
|
|
const char *attrs[] = { "dnsRecord", NULL };
|
|
int ret = LDB_ERR_NO_SUCH_OBJECT;
|
|
size_t i, j;
|
|
struct ldb_dn *dn = NULL;
|
|
struct ldb_result *res;
|
|
TALLOC_CTX *tmp_ctx = talloc_new(state);
|
|
struct ldb_val zone_name_val = data_blob_string_const(zone);
|
|
|
|
for (i=0; zone_prefixes[i]; i++) {
|
|
const char *casefold;
|
|
|
|
dn = ldb_dn_copy(tmp_ctx, ldb_get_default_basedn(state->samdb));
|
|
if (dn == NULL) {
|
|
talloc_free(tmp_ctx);
|
|
return ISC_R_NOMEMORY;
|
|
}
|
|
|
|
/*
|
|
* This dance ensures that it is not possible to put
|
|
* (eg) an extra DC=x, into the DNS name being
|
|
* queried
|
|
*/
|
|
|
|
if (!ldb_dn_add_child_fmt(dn,
|
|
"DC=X,%s",
|
|
zone_prefixes[i])) {
|
|
talloc_free(tmp_ctx);
|
|
return ISC_R_NOMEMORY;
|
|
}
|
|
|
|
ret = ldb_dn_set_component(dn,
|
|
0,
|
|
"DC",
|
|
zone_name_val);
|
|
if (ret != LDB_SUCCESS) {
|
|
talloc_free(tmp_ctx);
|
|
return ISC_R_NOMEMORY;
|
|
}
|
|
|
|
/*
|
|
* Check if this is a plausibly valid DN early
|
|
* (time spent here will be saved during the
|
|
* search due to an internal cache)
|
|
*/
|
|
casefold = ldb_dn_get_casefold(dn);
|
|
|
|
if (casefold == NULL) {
|
|
return ISC_R_NOTFOUND;
|
|
}
|
|
|
|
ret = ldb_search(state->samdb, tmp_ctx, &res, dn, LDB_SCOPE_SUBTREE,
|
|
attrs, "objectClass=dnsNode");
|
|
if (ret == LDB_SUCCESS) {
|
|
break;
|
|
}
|
|
}
|
|
if (ret != LDB_SUCCESS || dn == NULL) {
|
|
talloc_free(tmp_ctx);
|
|
return ISC_R_NOTFOUND;
|
|
}
|
|
|
|
for (i=0; i<res->count; i++) {
|
|
struct ldb_message_element *el;
|
|
TALLOC_CTX *el_ctx = talloc_new(tmp_ctx);
|
|
const char *rdn, *name;
|
|
const struct ldb_val *v;
|
|
WERROR werr;
|
|
struct dnsp_DnssrvRpcRecord *recs = NULL;
|
|
uint16_t num_recs = 0;
|
|
|
|
el = ldb_msg_find_element(res->msgs[i], "dnsRecord");
|
|
if (el == NULL || el->num_values == 0) {
|
|
state->log(ISC_LOG_INFO, "failed to find dnsRecord for %s",
|
|
ldb_dn_get_linearized(dn));
|
|
talloc_free(el_ctx);
|
|
continue;
|
|
}
|
|
|
|
v = ldb_dn_get_rdn_val(res->msgs[i]->dn);
|
|
if (v == NULL) {
|
|
state->log(ISC_LOG_INFO, "failed to find RDN for %s",
|
|
ldb_dn_get_linearized(dn));
|
|
talloc_free(el_ctx);
|
|
continue;
|
|
}
|
|
|
|
rdn = talloc_strndup(el_ctx, (char *)v->data, v->length);
|
|
if (rdn == NULL) {
|
|
talloc_free(tmp_ctx);
|
|
return ISC_R_NOMEMORY;
|
|
}
|
|
|
|
if (strcmp(rdn, "@") == 0) {
|
|
name = zone;
|
|
} else {
|
|
name = talloc_asprintf(el_ctx, "%s.%s", rdn, zone);
|
|
}
|
|
name = b9_format_fqdn(el_ctx, name);
|
|
if (name == NULL) {
|
|
talloc_free(tmp_ctx);
|
|
return ISC_R_NOMEMORY;
|
|
}
|
|
|
|
werr = dns_common_extract(state->samdb, el, el_ctx, &recs, &num_recs);
|
|
if (!W_ERROR_IS_OK(werr)) {
|
|
state->log(ISC_LOG_ERROR, "samba_dlz: failed to parse dnsRecord for %s, %s",
|
|
ldb_dn_get_linearized(dn), win_errstr(werr));
|
|
talloc_free(el_ctx);
|
|
continue;
|
|
}
|
|
|
|
for (j=0; j < num_recs; j++) {
|
|
isc_result_t result;
|
|
|
|
result = b9_putnamedrr(state, allnodes, name, &recs[j]);
|
|
if (result != ISC_R_SUCCESS) {
|
|
continue;
|
|
}
|
|
}
|
|
|
|
talloc_free(el_ctx);
|
|
}
|
|
|
|
talloc_free(tmp_ctx);
|
|
|
|
return ISC_R_SUCCESS;
|
|
}
|
|
|
|
|
|
/*
|
|
start a transaction
|
|
*/
|
|
_PUBLIC_ isc_result_t dlz_newversion(const char *zone, void *dbdata, void **versionp)
|
|
{
|
|
struct dlz_bind9_data *state = talloc_get_type_abort(dbdata, struct dlz_bind9_data);
|
|
|
|
state->log(ISC_LOG_INFO, "samba_dlz: starting transaction on zone %s", zone);
|
|
|
|
if (state->transaction_token != NULL) {
|
|
state->log(ISC_LOG_INFO, "samba_dlz: transaction already started for zone %s", zone);
|
|
return ISC_R_FAILURE;
|
|
}
|
|
|
|
state->transaction_token = talloc_zero(state, int);
|
|
if (state->transaction_token == NULL) {
|
|
return ISC_R_NOMEMORY;
|
|
}
|
|
|
|
if (ldb_transaction_start(state->samdb) != LDB_SUCCESS) {
|
|
state->log(ISC_LOG_INFO, "samba_dlz: failed to start a transaction for zone %s", zone);
|
|
talloc_free(state->transaction_token);
|
|
state->transaction_token = NULL;
|
|
return ISC_R_FAILURE;
|
|
}
|
|
|
|
*versionp = (void *)state->transaction_token;
|
|
|
|
return ISC_R_SUCCESS;
|
|
}
|
|
|
|
/*
|
|
end a transaction
|
|
*/
|
|
_PUBLIC_ void dlz_closeversion(const char *zone, isc_boolean_t commit,
|
|
void *dbdata, void **versionp)
|
|
{
|
|
struct dlz_bind9_data *state = talloc_get_type_abort(dbdata, struct dlz_bind9_data);
|
|
|
|
if (state->transaction_token != (int *)*versionp) {
|
|
state->log(ISC_LOG_INFO, "samba_dlz: transaction not started for zone %s", zone);
|
|
return;
|
|
}
|
|
|
|
if (commit) {
|
|
if (ldb_transaction_commit(state->samdb) != LDB_SUCCESS) {
|
|
state->log(ISC_LOG_INFO, "samba_dlz: failed to commit a transaction for zone %s", zone);
|
|
return;
|
|
}
|
|
state->log(ISC_LOG_INFO, "samba_dlz: committed transaction on zone %s", zone);
|
|
} else {
|
|
if (ldb_transaction_cancel(state->samdb) != LDB_SUCCESS) {
|
|
state->log(ISC_LOG_INFO, "samba_dlz: failed to cancel a transaction for zone %s", zone);
|
|
return;
|
|
}
|
|
state->log(ISC_LOG_INFO, "samba_dlz: cancelling transaction on zone %s", zone);
|
|
}
|
|
|
|
talloc_free(state->transaction_token);
|
|
state->transaction_token = NULL;
|
|
*versionp = NULL;
|
|
}
|
|
|
|
|
|
/*
|
|
see if there is a SOA record for a zone
|
|
*/
|
|
static bool b9_has_soa(struct dlz_bind9_data *state, struct ldb_dn *dn, const char *zone)
|
|
{
|
|
TALLOC_CTX *tmp_ctx = talloc_new(state);
|
|
WERROR werr;
|
|
struct dnsp_DnssrvRpcRecord *records = NULL;
|
|
uint16_t num_records = 0, i;
|
|
struct ldb_val zone_name_val
|
|
= data_blob_string_const(zone);
|
|
|
|
/*
|
|
* This dance ensures that it is not possible to put
|
|
* (eg) an extra DC=x, into the DNS name being
|
|
* queried
|
|
*/
|
|
|
|
if (!ldb_dn_add_child_val(dn,
|
|
"DC",
|
|
zone_name_val)) {
|
|
talloc_free(tmp_ctx);
|
|
return false;
|
|
}
|
|
|
|
werr = dns_common_lookup(state->samdb, tmp_ctx, dn,
|
|
&records, &num_records, NULL);
|
|
if (!W_ERROR_IS_OK(werr)) {
|
|
talloc_free(tmp_ctx);
|
|
return false;
|
|
}
|
|
|
|
for (i=0; i < num_records; i++) {
|
|
if (records[i].wType == DNS_TYPE_SOA) {
|
|
talloc_free(tmp_ctx);
|
|
return true;
|
|
}
|
|
}
|
|
|
|
talloc_free(tmp_ctx);
|
|
return false;
|
|
}
|
|
|
|
static bool b9_zone_add(struct dlz_bind9_data *state, const char *name)
|
|
{
|
|
struct b9_zone *zone;
|
|
|
|
zone = talloc_zero(state, struct b9_zone);
|
|
if (zone == NULL) {
|
|
return false;
|
|
}
|
|
|
|
zone->name = talloc_strdup(zone, name);
|
|
if (zone->name == NULL) {
|
|
talloc_free(zone);
|
|
return false;
|
|
}
|
|
|
|
DLIST_ADD(state->zonelist, zone);
|
|
return true;
|
|
}
|
|
|
|
static bool b9_zone_exists(struct dlz_bind9_data *state, const char *name)
|
|
{
|
|
struct b9_zone *zone = state->zonelist;
|
|
bool found = false;
|
|
|
|
while (zone != NULL) {
|
|
if (strcasecmp(name, zone->name) == 0) {
|
|
found = true;
|
|
break;
|
|
}
|
|
zone = zone->next;
|
|
}
|
|
|
|
return found;
|
|
}
|
|
|
|
|
|
/*
|
|
configure a writeable zone
|
|
*/
|
|
#if DLZ_DLOPEN_VERSION < 3
|
|
_PUBLIC_ isc_result_t dlz_configure(dns_view_t *view, void *dbdata)
|
|
#else
|
|
_PUBLIC_ isc_result_t dlz_configure(dns_view_t *view, dns_dlzdb_t *dlzdb,
|
|
void *dbdata)
|
|
#endif
|
|
{
|
|
struct dlz_bind9_data *state = talloc_get_type_abort(dbdata, struct dlz_bind9_data);
|
|
TALLOC_CTX *tmp_ctx;
|
|
struct ldb_dn *dn;
|
|
int i;
|
|
|
|
state->log(ISC_LOG_INFO, "samba_dlz: starting configure");
|
|
if (state->writeable_zone == NULL) {
|
|
state->log(ISC_LOG_INFO, "samba_dlz: no writeable_zone method available");
|
|
return ISC_R_FAILURE;
|
|
}
|
|
|
|
tmp_ctx = talloc_new(state);
|
|
|
|
for (i=0; zone_prefixes[i]; i++) {
|
|
const char *attrs[] = { "name", NULL };
|
|
int j, ret;
|
|
struct ldb_result *res;
|
|
|
|
dn = ldb_dn_copy(tmp_ctx, ldb_get_default_basedn(state->samdb));
|
|
if (dn == NULL) {
|
|
talloc_free(tmp_ctx);
|
|
return ISC_R_NOMEMORY;
|
|
}
|
|
|
|
if (!ldb_dn_add_child_fmt(dn, "%s", zone_prefixes[i])) {
|
|
talloc_free(tmp_ctx);
|
|
return ISC_R_NOMEMORY;
|
|
}
|
|
|
|
ret = ldb_search(state->samdb, tmp_ctx, &res, dn, LDB_SCOPE_SUBTREE,
|
|
attrs, "objectClass=dnsZone");
|
|
if (ret != LDB_SUCCESS) {
|
|
continue;
|
|
}
|
|
|
|
for (j=0; j<res->count; j++) {
|
|
isc_result_t result;
|
|
const char *zone = ldb_msg_find_attr_as_string(res->msgs[j], "name", NULL);
|
|
struct ldb_dn *zone_dn;
|
|
|
|
if (zone == NULL) {
|
|
continue;
|
|
}
|
|
/* Ignore zones that are not handled in BIND */
|
|
if ((strcmp(zone, "RootDNSServers") == 0) ||
|
|
(strcmp(zone, "..TrustAnchors") == 0)) {
|
|
continue;
|
|
}
|
|
zone_dn = ldb_dn_copy(tmp_ctx, dn);
|
|
if (zone_dn == NULL) {
|
|
talloc_free(tmp_ctx);
|
|
return ISC_R_NOMEMORY;
|
|
}
|
|
|
|
if (!b9_has_soa(state, zone_dn, zone)) {
|
|
continue;
|
|
}
|
|
|
|
if (b9_zone_exists(state, zone)) {
|
|
state->log(ISC_LOG_WARNING, "samba_dlz: Ignoring duplicate zone '%s' from '%s'",
|
|
zone, ldb_dn_get_linearized(zone_dn));
|
|
continue;
|
|
}
|
|
|
|
if (!b9_zone_add(state, zone)) {
|
|
talloc_free(tmp_ctx);
|
|
return ISC_R_NOMEMORY;
|
|
}
|
|
|
|
#if DLZ_DLOPEN_VERSION < 3
|
|
result = state->writeable_zone(view, zone);
|
|
#else
|
|
result = state->writeable_zone(view, dlzdb, zone);
|
|
#endif
|
|
if (result != ISC_R_SUCCESS) {
|
|
state->log(ISC_LOG_ERROR, "samba_dlz: Failed to configure zone '%s'",
|
|
zone);
|
|
talloc_free(tmp_ctx);
|
|
return result;
|
|
}
|
|
state->log(ISC_LOG_INFO, "samba_dlz: configured writeable zone '%s'", zone);
|
|
}
|
|
}
|
|
|
|
talloc_free(tmp_ctx);
|
|
return ISC_R_SUCCESS;
|
|
}
|
|
|
|
/*
|
|
authorize a zone update
|
|
*/
|
|
_PUBLIC_ isc_boolean_t dlz_ssumatch(const char *signer, const char *name, const char *tcpaddr,
|
|
const char *type, const char *key, uint32_t keydatalen, uint8_t *keydata,
|
|
void *dbdata)
|
|
{
|
|
struct dlz_bind9_data *state = talloc_get_type_abort(dbdata, struct dlz_bind9_data);
|
|
TALLOC_CTX *tmp_ctx;
|
|
DATA_BLOB ap_req;
|
|
struct cli_credentials *server_credentials;
|
|
char *keytab_name;
|
|
char *keytab_file = NULL;
|
|
int ret;
|
|
int ldb_ret;
|
|
NTSTATUS nt_status;
|
|
struct gensec_security *gensec_ctx;
|
|
struct auth_session_info *session_info;
|
|
struct ldb_dn *dn;
|
|
isc_result_t result;
|
|
struct ldb_result *res;
|
|
const char * attrs[] = { NULL };
|
|
uint32_t access_mask;
|
|
struct gensec_settings *settings = NULL;
|
|
const struct gensec_security_ops **backends = NULL;
|
|
size_t idx = 0;
|
|
|
|
/* Remove cached credentials, if any */
|
|
if (state->session_info) {
|
|
talloc_free(state->session_info);
|
|
state->session_info = NULL;
|
|
}
|
|
if (state->update_name) {
|
|
talloc_free(state->update_name);
|
|
state->update_name = NULL;
|
|
}
|
|
|
|
tmp_ctx = talloc_new(NULL);
|
|
if (tmp_ctx == NULL) {
|
|
state->log(ISC_LOG_ERROR, "samba_dlz: no memory");
|
|
return ISC_FALSE;
|
|
}
|
|
|
|
ap_req = data_blob_const(keydata, keydatalen);
|
|
server_credentials = cli_credentials_init(tmp_ctx);
|
|
if (!server_credentials) {
|
|
state->log(ISC_LOG_ERROR, "samba_dlz: failed to init server credentials");
|
|
talloc_free(tmp_ctx);
|
|
return ISC_FALSE;
|
|
}
|
|
|
|
cli_credentials_set_krb5_context(server_credentials, state->smb_krb5_ctx);
|
|
cli_credentials_set_conf(server_credentials, state->lp);
|
|
|
|
keytab_file = talloc_asprintf(tmp_ctx,
|
|
"%s/dns.keytab",
|
|
lpcfg_binddns_dir(state->lp));
|
|
if (keytab_file == NULL) {
|
|
state->log(ISC_LOG_ERROR, "samba_dlz: Out of memory!");
|
|
talloc_free(tmp_ctx);
|
|
return ISC_FALSE;
|
|
}
|
|
|
|
if (!file_exist(keytab_file)) {
|
|
keytab_file = talloc_asprintf(tmp_ctx,
|
|
"%s/dns.keytab",
|
|
lpcfg_private_dir(state->lp));
|
|
if (keytab_file == NULL) {
|
|
state->log(ISC_LOG_ERROR, "samba_dlz: Out of memory!");
|
|
talloc_free(tmp_ctx);
|
|
return ISC_FALSE;
|
|
}
|
|
}
|
|
|
|
keytab_name = talloc_asprintf(tmp_ctx, "FILE:%s", keytab_file);
|
|
if (keytab_name == NULL) {
|
|
state->log(ISC_LOG_ERROR, "samba_dlz: Out of memory!");
|
|
talloc_free(tmp_ctx);
|
|
return ISC_FALSE;
|
|
}
|
|
|
|
ret = cli_credentials_set_keytab_name(server_credentials, state->lp, keytab_name,
|
|
CRED_SPECIFIED);
|
|
if (ret != 0) {
|
|
state->log(ISC_LOG_ERROR, "samba_dlz: failed to obtain server credentials from %s",
|
|
keytab_name);
|
|
talloc_free(tmp_ctx);
|
|
return ISC_FALSE;
|
|
}
|
|
talloc_free(keytab_name);
|
|
|
|
settings = lpcfg_gensec_settings(tmp_ctx, state->lp);
|
|
if (settings == NULL) {
|
|
state->log(ISC_LOG_ERROR, "samba_dlz: lpcfg_gensec_settings failed");
|
|
talloc_free(tmp_ctx);
|
|
return ISC_FALSE;
|
|
}
|
|
backends = talloc_zero_array(settings,
|
|
const struct gensec_security_ops *, 3);
|
|
if (backends == NULL) {
|
|
state->log(ISC_LOG_ERROR, "samba_dlz: talloc_zero_array gensec_security_ops failed");
|
|
talloc_free(tmp_ctx);
|
|
return ISC_FALSE;
|
|
}
|
|
settings->backends = backends;
|
|
|
|
gensec_init();
|
|
|
|
backends[idx++] = gensec_security_by_oid(NULL, GENSEC_OID_KERBEROS5);
|
|
backends[idx++] = gensec_security_by_oid(NULL, GENSEC_OID_SPNEGO);
|
|
|
|
nt_status = gensec_server_start(tmp_ctx, settings,
|
|
state->auth_context, &gensec_ctx);
|
|
if (!NT_STATUS_IS_OK(nt_status)) {
|
|
state->log(ISC_LOG_ERROR, "samba_dlz: failed to start gensec server");
|
|
talloc_free(tmp_ctx);
|
|
return ISC_FALSE;
|
|
}
|
|
|
|
gensec_set_credentials(gensec_ctx, server_credentials);
|
|
|
|
nt_status = gensec_start_mech_by_oid(gensec_ctx, GENSEC_OID_SPNEGO);
|
|
if (!NT_STATUS_IS_OK(nt_status)) {
|
|
state->log(ISC_LOG_ERROR, "samba_dlz: failed to start spnego");
|
|
talloc_free(tmp_ctx);
|
|
return ISC_FALSE;
|
|
}
|
|
|
|
/*
|
|
* We only allow SPNEGO/KRB5 and make sure the backend
|
|
* to is RPC/IPC free.
|
|
*
|
|
* See gensec_gssapi_update_internal() as
|
|
* GENSEC_SERVER.
|
|
*
|
|
* It allows gensec_update() not to block.
|
|
*
|
|
* If that changes in future we need to use
|
|
* gensec_update_send/recv here!
|
|
*/
|
|
nt_status = gensec_update(gensec_ctx, tmp_ctx, ap_req, &ap_req);
|
|
if (!NT_STATUS_IS_OK(nt_status)) {
|
|
state->log(ISC_LOG_ERROR, "samba_dlz: spnego update failed");
|
|
talloc_free(tmp_ctx);
|
|
return ISC_FALSE;
|
|
}
|
|
|
|
nt_status = gensec_session_info(gensec_ctx, tmp_ctx, &session_info);
|
|
if (!NT_STATUS_IS_OK(nt_status)) {
|
|
state->log(ISC_LOG_ERROR, "samba_dlz: failed to create session info");
|
|
talloc_free(tmp_ctx);
|
|
return ISC_FALSE;
|
|
}
|
|
|
|
/* Get the DN from name */
|
|
result = b9_find_name_dn(state, name, tmp_ctx, &dn);
|
|
if (result != ISC_R_SUCCESS) {
|
|
state->log(ISC_LOG_ERROR, "samba_dlz: failed to find name %s", name);
|
|
talloc_free(tmp_ctx);
|
|
return ISC_FALSE;
|
|
}
|
|
|
|
/* make sure the dn exists, or find parent dn in case new object is being added */
|
|
ldb_ret = ldb_search(state->samdb, tmp_ctx, &res, dn, LDB_SCOPE_BASE,
|
|
attrs, "objectClass=dnsNode");
|
|
if (ldb_ret == LDB_ERR_NO_SUCH_OBJECT) {
|
|
ldb_dn_remove_child_components(dn, 1);
|
|
access_mask = SEC_ADS_CREATE_CHILD;
|
|
talloc_free(res);
|
|
} else if (ldb_ret == LDB_SUCCESS) {
|
|
access_mask = SEC_STD_REQUIRED | SEC_ADS_SELF_WRITE;
|
|
talloc_free(res);
|
|
} else {
|
|
talloc_free(tmp_ctx);
|
|
return ISC_FALSE;
|
|
}
|
|
|
|
/* Do ACL check */
|
|
ldb_ret = dsdb_check_access_on_dn(state->samdb, tmp_ctx, dn,
|
|
session_info->security_token,
|
|
access_mask, NULL);
|
|
if (ldb_ret != LDB_SUCCESS) {
|
|
state->log(ISC_LOG_INFO,
|
|
"samba_dlz: disallowing update of signer=%s name=%s type=%s error=%s",
|
|
signer, name, type, ldb_strerror(ldb_ret));
|
|
talloc_free(tmp_ctx);
|
|
return ISC_FALSE;
|
|
}
|
|
|
|
/* Cache session_info, so it can be used in the actual add/delete operation */
|
|
state->update_name = talloc_strdup(state, name);
|
|
if (state->update_name == NULL) {
|
|
state->log(ISC_LOG_ERROR, "samba_dlz: memory allocation error");
|
|
talloc_free(tmp_ctx);
|
|
return ISC_FALSE;
|
|
}
|
|
state->session_info = talloc_steal(state, session_info);
|
|
|
|
state->log(ISC_LOG_INFO, "samba_dlz: allowing update of signer=%s name=%s tcpaddr=%s type=%s key=%s",
|
|
signer, name, tcpaddr, type, key);
|
|
|
|
talloc_free(tmp_ctx);
|
|
return ISC_TRUE;
|
|
}
|
|
|
|
/*
|
|
see if two dns records match
|
|
*/
|
|
static bool b9_record_match(struct dlz_bind9_data *state,
|
|
struct dnsp_DnssrvRpcRecord *rec1, struct dnsp_DnssrvRpcRecord *rec2)
|
|
{
|
|
bool status;
|
|
int i;
|
|
struct in6_addr rec1_in_addr6;
|
|
struct in6_addr rec2_in_addr6;
|
|
|
|
if (rec1->wType != rec2->wType) {
|
|
return false;
|
|
}
|
|
/* see if this type is single valued */
|
|
if (b9_single_valued(rec1->wType)) {
|
|
return true;
|
|
}
|
|
|
|
/* see if the data matches */
|
|
switch (rec1->wType) {
|
|
case DNS_TYPE_A:
|
|
return strcmp(rec1->data.ipv4, rec2->data.ipv4) == 0;
|
|
case DNS_TYPE_AAAA: {
|
|
int ret;
|
|
|
|
ret = inet_pton(AF_INET6, rec1->data.ipv6, &rec1_in_addr6);
|
|
if (ret != 1) {
|
|
return false;
|
|
}
|
|
ret = inet_pton(AF_INET6, rec2->data.ipv6, &rec2_in_addr6);
|
|
if (ret != 1) {
|
|
return false;
|
|
}
|
|
|
|
return memcmp(&rec1_in_addr6, &rec2_in_addr6, sizeof(rec1_in_addr6)) == 0;
|
|
}
|
|
case DNS_TYPE_CNAME:
|
|
return dns_name_equal(rec1->data.cname, rec2->data.cname);
|
|
case DNS_TYPE_TXT:
|
|
status = (rec1->data.txt.count == rec2->data.txt.count);
|
|
if (!status) return status;
|
|
for (i=0; i<rec1->data.txt.count; i++) {
|
|
status &= (strcmp(rec1->data.txt.str[i], rec2->data.txt.str[i]) == 0);
|
|
}
|
|
return status;
|
|
case DNS_TYPE_PTR:
|
|
return dns_name_equal(rec1->data.ptr, rec2->data.ptr);
|
|
case DNS_TYPE_NS:
|
|
return dns_name_equal(rec1->data.ns, rec2->data.ns);
|
|
|
|
case DNS_TYPE_SRV:
|
|
return rec1->data.srv.wPriority == rec2->data.srv.wPriority &&
|
|
rec1->data.srv.wWeight == rec2->data.srv.wWeight &&
|
|
rec1->data.srv.wPort == rec2->data.srv.wPort &&
|
|
dns_name_equal(rec1->data.srv.nameTarget, rec2->data.srv.nameTarget);
|
|
|
|
case DNS_TYPE_MX:
|
|
return rec1->data.mx.wPriority == rec2->data.mx.wPriority &&
|
|
dns_name_equal(rec1->data.mx.nameTarget, rec2->data.mx.nameTarget);
|
|
|
|
case DNS_TYPE_HINFO:
|
|
return strcmp(rec1->data.hinfo.cpu, rec2->data.hinfo.cpu) == 0 &&
|
|
strcmp(rec1->data.hinfo.os, rec2->data.hinfo.os) == 0;
|
|
|
|
case DNS_TYPE_SOA:
|
|
return dns_name_equal(rec1->data.soa.mname, rec2->data.soa.mname) &&
|
|
dns_name_equal(rec1->data.soa.rname, rec2->data.soa.rname) &&
|
|
rec1->data.soa.serial == rec2->data.soa.serial &&
|
|
rec1->data.soa.refresh == rec2->data.soa.refresh &&
|
|
rec1->data.soa.retry == rec2->data.soa.retry &&
|
|
rec1->data.soa.expire == rec2->data.soa.expire &&
|
|
rec1->data.soa.minimum == rec2->data.soa.minimum;
|
|
default:
|
|
state->log(ISC_LOG_ERROR, "samba_dlz b9_record_match: unhandled record type %u",
|
|
rec1->wType);
|
|
break;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/*
|
|
* Update session_info on samdb using the cached credentials
|
|
*/
|
|
static bool b9_set_session_info(struct dlz_bind9_data *state, const char *name)
|
|
{
|
|
int ret;
|
|
|
|
if (state->update_name == NULL || state->session_info == NULL) {
|
|
state->log(ISC_LOG_ERROR, "samba_dlz: invalid credentials");
|
|
return false;
|
|
}
|
|
|
|
/* Do not use client credentials, if we're not updating the client specified name */
|
|
if (strcmp(state->update_name, name) != 0) {
|
|
return true;
|
|
}
|
|
|
|
ret = ldb_set_opaque(
|
|
state->samdb,
|
|
DSDB_SESSION_INFO,
|
|
state->session_info);
|
|
if (ret != LDB_SUCCESS) {
|
|
state->log(ISC_LOG_ERROR, "samba_dlz: unable to set session info");
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/*
|
|
* Reset session_info on samdb as system session
|
|
*/
|
|
static void b9_reset_session_info(struct dlz_bind9_data *state)
|
|
{
|
|
ldb_set_opaque(
|
|
state->samdb,
|
|
DSDB_SESSION_INFO,
|
|
system_session(state->lp));
|
|
}
|
|
|
|
/*
|
|
add or modify a rdataset
|
|
*/
|
|
_PUBLIC_ isc_result_t dlz_addrdataset(const char *name, const char *rdatastr, void *dbdata, void *version)
|
|
{
|
|
struct dlz_bind9_data *state = talloc_get_type_abort(dbdata, struct dlz_bind9_data);
|
|
struct dnsp_DnssrvRpcRecord *rec;
|
|
struct ldb_dn *dn;
|
|
isc_result_t result;
|
|
bool tombstoned = false;
|
|
bool needs_add = false;
|
|
struct dnsp_DnssrvRpcRecord *recs = NULL;
|
|
uint16_t num_recs = 0;
|
|
uint16_t first = 0;
|
|
uint16_t i;
|
|
NTTIME t;
|
|
WERROR werr;
|
|
|
|
if (state->transaction_token != (void*)version) {
|
|
state->log(ISC_LOG_INFO, "samba_dlz: bad transaction version");
|
|
return ISC_R_FAILURE;
|
|
}
|
|
|
|
rec = talloc_zero(state, struct dnsp_DnssrvRpcRecord);
|
|
if (rec == NULL) {
|
|
return ISC_R_NOMEMORY;
|
|
}
|
|
|
|
rec->rank = DNS_RANK_ZONE;
|
|
|
|
if (!b9_parse(state, rdatastr, rec)) {
|
|
state->log(ISC_LOG_INFO, "samba_dlz: failed to parse rdataset '%s'", rdatastr);
|
|
talloc_free(rec);
|
|
return ISC_R_FAILURE;
|
|
}
|
|
|
|
/* find the DN of the record */
|
|
result = b9_find_name_dn(state, name, rec, &dn);
|
|
if (result != ISC_R_SUCCESS) {
|
|
talloc_free(rec);
|
|
return result;
|
|
}
|
|
|
|
/* get any existing records */
|
|
werr = dns_common_lookup(state->samdb, rec, dn,
|
|
&recs, &num_recs, &tombstoned);
|
|
if (W_ERROR_EQUAL(werr, WERR_DNS_ERROR_NAME_DOES_NOT_EXIST)) {
|
|
needs_add = true;
|
|
werr = WERR_OK;
|
|
}
|
|
if (!W_ERROR_IS_OK(werr)) {
|
|
state->log(ISC_LOG_ERROR, "samba_dlz: failed to parse dnsRecord for %s, %s",
|
|
ldb_dn_get_linearized(dn), win_errstr(werr));
|
|
talloc_free(rec);
|
|
return ISC_R_FAILURE;
|
|
}
|
|
|
|
if (tombstoned) {
|
|
/*
|
|
* we need to keep the existing tombstone record
|
|
* and ignore it
|
|
*/
|
|
first = num_recs;
|
|
}
|
|
|
|
/* there are existing records. We need to see if this will
|
|
* replace a record or add to it
|
|
*/
|
|
for (i=first; i < num_recs; i++) {
|
|
if (b9_record_match(state, rec, &recs[i])) {
|
|
break;
|
|
}
|
|
}
|
|
if (i == UINT16_MAX) {
|
|
state->log(ISC_LOG_ERROR, "samba_dlz: failed to already %u dnsRecord values for %s",
|
|
i, ldb_dn_get_linearized(dn));
|
|
talloc_free(rec);
|
|
return ISC_R_FAILURE;
|
|
}
|
|
|
|
if (i == num_recs) {
|
|
/* adding a new value */
|
|
recs = talloc_realloc(rec, recs,
|
|
struct dnsp_DnssrvRpcRecord,
|
|
num_recs + 1);
|
|
if (recs == NULL) {
|
|
talloc_free(rec);
|
|
return ISC_R_NOMEMORY;
|
|
}
|
|
num_recs++;
|
|
|
|
if (dns_name_is_static(recs, num_recs)) {
|
|
rec->dwTimeStamp = 0;
|
|
} else {
|
|
unix_to_nt_time(&t, time(NULL));
|
|
t /= 10 * 1000 * 1000; /* convert to seconds */
|
|
t /= 3600; /* convert to hours */
|
|
rec->dwTimeStamp = (uint32_t)t;
|
|
}
|
|
}
|
|
|
|
recs[i] = *rec;
|
|
|
|
if (!b9_set_session_info(state, name)) {
|
|
talloc_free(rec);
|
|
return ISC_R_FAILURE;
|
|
}
|
|
|
|
/* modify the record */
|
|
werr = dns_common_replace(state->samdb, rec, dn,
|
|
needs_add,
|
|
state->soa_serial,
|
|
recs, num_recs);
|
|
b9_reset_session_info(state);
|
|
if (!W_ERROR_IS_OK(werr)) {
|
|
state->log(ISC_LOG_ERROR, "samba_dlz: failed to %s %s - %s",
|
|
needs_add ? "add" : "modify",
|
|
ldb_dn_get_linearized(dn), win_errstr(werr));
|
|
talloc_free(rec);
|
|
return ISC_R_FAILURE;
|
|
}
|
|
|
|
state->log(ISC_LOG_INFO, "samba_dlz: added rdataset %s '%s'", name, rdatastr);
|
|
|
|
talloc_free(rec);
|
|
return ISC_R_SUCCESS;
|
|
}
|
|
|
|
/*
|
|
remove a rdataset
|
|
*/
|
|
_PUBLIC_ isc_result_t dlz_subrdataset(const char *name, const char *rdatastr, void *dbdata, void *version)
|
|
{
|
|
struct dlz_bind9_data *state = talloc_get_type_abort(dbdata, struct dlz_bind9_data);
|
|
struct dnsp_DnssrvRpcRecord *rec;
|
|
struct ldb_dn *dn;
|
|
isc_result_t result;
|
|
struct dnsp_DnssrvRpcRecord *recs = NULL;
|
|
uint16_t num_recs = 0;
|
|
uint16_t i;
|
|
WERROR werr;
|
|
|
|
if (state->transaction_token != (void*)version) {
|
|
state->log(ISC_LOG_ERROR, "samba_dlz: bad transaction version");
|
|
return ISC_R_FAILURE;
|
|
}
|
|
|
|
rec = talloc_zero(state, struct dnsp_DnssrvRpcRecord);
|
|
if (rec == NULL) {
|
|
return ISC_R_NOMEMORY;
|
|
}
|
|
|
|
if (!b9_parse(state, rdatastr, rec)) {
|
|
state->log(ISC_LOG_ERROR, "samba_dlz: failed to parse rdataset '%s'", rdatastr);
|
|
talloc_free(rec);
|
|
return ISC_R_FAILURE;
|
|
}
|
|
|
|
/* find the DN of the record */
|
|
result = b9_find_name_dn(state, name, rec, &dn);
|
|
if (result != ISC_R_SUCCESS) {
|
|
talloc_free(rec);
|
|
return result;
|
|
}
|
|
|
|
/* get the existing records */
|
|
werr = dns_common_lookup(state->samdb, rec, dn,
|
|
&recs, &num_recs, NULL);
|
|
if (!W_ERROR_IS_OK(werr)) {
|
|
talloc_free(rec);
|
|
return ISC_R_NOTFOUND;
|
|
}
|
|
|
|
for (i=0; i < num_recs; i++) {
|
|
if (b9_record_match(state, rec, &recs[i])) {
|
|
recs[i] = (struct dnsp_DnssrvRpcRecord) {
|
|
.wType = DNS_TYPE_TOMBSTONE,
|
|
};
|
|
break;
|
|
}
|
|
}
|
|
if (i == num_recs) {
|
|
talloc_free(rec);
|
|
return ISC_R_NOTFOUND;
|
|
}
|
|
|
|
if (!b9_set_session_info(state, name)) {
|
|
talloc_free(rec);
|
|
return ISC_R_FAILURE;
|
|
}
|
|
|
|
/* modify the record */
|
|
werr = dns_common_replace(state->samdb, rec, dn,
|
|
false,/* needs_add */
|
|
state->soa_serial,
|
|
recs, num_recs);
|
|
b9_reset_session_info(state);
|
|
if (!W_ERROR_IS_OK(werr)) {
|
|
state->log(ISC_LOG_ERROR, "samba_dlz: failed to modify %s - %s",
|
|
ldb_dn_get_linearized(dn), win_errstr(werr));
|
|
talloc_free(rec);
|
|
return ISC_R_FAILURE;
|
|
}
|
|
|
|
state->log(ISC_LOG_INFO, "samba_dlz: subtracted rdataset %s '%s'", name, rdatastr);
|
|
|
|
talloc_free(rec);
|
|
return ISC_R_SUCCESS;
|
|
}
|
|
|
|
|
|
/*
|
|
delete all records of the given type
|
|
*/
|
|
_PUBLIC_ isc_result_t dlz_delrdataset(const char *name, const char *type, void *dbdata, void *version)
|
|
{
|
|
struct dlz_bind9_data *state = talloc_get_type_abort(dbdata, struct dlz_bind9_data);
|
|
TALLOC_CTX *tmp_ctx;
|
|
struct ldb_dn *dn;
|
|
isc_result_t result;
|
|
enum dns_record_type dns_type;
|
|
bool found = false;
|
|
struct dnsp_DnssrvRpcRecord *recs = NULL;
|
|
uint16_t num_recs = 0;
|
|
uint16_t ri = 0;
|
|
WERROR werr;
|
|
|
|
if (state->transaction_token != (void*)version) {
|
|
state->log(ISC_LOG_ERROR, "samba_dlz: bad transaction version");
|
|
return ISC_R_FAILURE;
|
|
}
|
|
|
|
if (!b9_dns_type(type, &dns_type)) {
|
|
state->log(ISC_LOG_ERROR, "samba_dlz: bad dns type %s in delete", type);
|
|
return ISC_R_FAILURE;
|
|
}
|
|
|
|
tmp_ctx = talloc_new(state);
|
|
|
|
/* find the DN of the record */
|
|
result = b9_find_name_dn(state, name, tmp_ctx, &dn);
|
|
if (result != ISC_R_SUCCESS) {
|
|
talloc_free(tmp_ctx);
|
|
return result;
|
|
}
|
|
|
|
/* get the existing records */
|
|
werr = dns_common_lookup(state->samdb, tmp_ctx, dn,
|
|
&recs, &num_recs, NULL);
|
|
if (!W_ERROR_IS_OK(werr)) {
|
|
talloc_free(tmp_ctx);
|
|
return ISC_R_NOTFOUND;
|
|
}
|
|
|
|
for (ri=0; ri < num_recs; ri++) {
|
|
if (dns_type != recs[ri].wType) {
|
|
continue;
|
|
}
|
|
|
|
found = true;
|
|
recs[ri] = (struct dnsp_DnssrvRpcRecord) {
|
|
.wType = DNS_TYPE_TOMBSTONE,
|
|
};
|
|
}
|
|
|
|
if (!found) {
|
|
talloc_free(tmp_ctx);
|
|
return ISC_R_FAILURE;
|
|
}
|
|
|
|
if (!b9_set_session_info(state, name)) {
|
|
talloc_free(tmp_ctx);
|
|
return ISC_R_FAILURE;
|
|
}
|
|
|
|
/* modify the record */
|
|
werr = dns_common_replace(state->samdb, tmp_ctx, dn,
|
|
false,/* needs_add */
|
|
state->soa_serial,
|
|
recs, num_recs);
|
|
b9_reset_session_info(state);
|
|
if (!W_ERROR_IS_OK(werr)) {
|
|
state->log(ISC_LOG_ERROR, "samba_dlz: failed to modify %s - %s",
|
|
ldb_dn_get_linearized(dn), win_errstr(werr));
|
|
talloc_free(tmp_ctx);
|
|
return ISC_R_FAILURE;
|
|
}
|
|
|
|
state->log(ISC_LOG_INFO, "samba_dlz: deleted rdataset %s of type %s", name, type);
|
|
|
|
talloc_free(tmp_ctx);
|
|
return ISC_R_SUCCESS;
|
|
}
|