mirror of
https://github.com/samba-team/samba.git
synced 2024-12-24 21:34:56 +03:00
dbbb626dc0
This allows dlz_bind9 to match on exactly the same key as bind9 itself Andrew Bartlett Autobuild-User: Amitay Isaacs <amitay@samba.org> Autobuild-Date: Wed Dec 7 02:20:10 CET 2011 on sn-devel-104
1688 lines
42 KiB
C
1688 lines
42 KiB
C
/*
|
|
Unix SMB/CIFS implementation.
|
|
|
|
bind9 dlz driver for Samba
|
|
|
|
Copyright (C) 2010 Andrew Tridgell
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "includes.h"
|
|
#include "talloc.h"
|
|
#include "param/param.h"
|
|
#include "lib/events/events.h"
|
|
#include "dsdb/samdb/samdb.h"
|
|
#include "dsdb/common/util.h"
|
|
#include "auth/auth.h"
|
|
#include "auth/session.h"
|
|
#include "auth/gensec/gensec.h"
|
|
#include "librpc/gen_ndr/security.h"
|
|
#include "auth/credentials/credentials.h"
|
|
#include "system/kerberos.h"
|
|
#include "auth/kerberos/kerberos.h"
|
|
#include "gen_ndr/ndr_dnsp.h"
|
|
#include "gen_ndr/server_id.h"
|
|
#include "messaging/messaging.h"
|
|
#include "lib/cmdline/popt_common.h"
|
|
#include "dlz_minimal.h"
|
|
|
|
|
|
struct b9_options {
|
|
const char *url;
|
|
const char *debug;
|
|
};
|
|
|
|
struct dlz_bind9_data {
|
|
struct b9_options options;
|
|
struct ldb_context *samdb;
|
|
struct tevent_context *ev_ctx;
|
|
struct loadparm_context *lp;
|
|
int *transaction_token;
|
|
uint32_t soa_serial;
|
|
|
|
/* Used for dynamic update */
|
|
struct smb_krb5_context *smb_krb5_ctx;
|
|
struct auth_session_info *session_info;
|
|
char *update_name;
|
|
|
|
/* helper functions from the dlz_dlopen driver */
|
|
void (*log)(int level, const char *fmt, ...);
|
|
isc_result_t (*putrr)(dns_sdlzlookup_t *handle, const char *type,
|
|
dns_ttl_t ttl, const char *data);
|
|
isc_result_t (*putnamedrr)(dns_sdlzlookup_t *handle, const char *name,
|
|
const char *type, dns_ttl_t ttl, const char *data);
|
|
isc_result_t (*writeable_zone)(dns_view_t *view, const char *zone_name);
|
|
};
|
|
|
|
|
|
static const char *zone_prefixes[] = {
|
|
"CN=MicrosoftDNS,DC=DomainDnsZones",
|
|
"CN=MicrosoftDNS,DC=ForestDnsZones",
|
|
"CN=MicrosoftDNS,CN=System",
|
|
NULL
|
|
};
|
|
|
|
/*
|
|
return the version of the API
|
|
*/
|
|
_PUBLIC_ int dlz_version(unsigned int *flags)
|
|
{
|
|
return DLZ_DLOPEN_VERSION;
|
|
}
|
|
|
|
/*
|
|
remember a helper function from the bind9 dlz_dlopen driver
|
|
*/
|
|
static void b9_add_helper(struct dlz_bind9_data *state, const char *helper_name, void *ptr)
|
|
{
|
|
if (strcmp(helper_name, "log") == 0) {
|
|
state->log = ptr;
|
|
}
|
|
if (strcmp(helper_name, "putrr") == 0) {
|
|
state->putrr = ptr;
|
|
}
|
|
if (strcmp(helper_name, "putnamedrr") == 0) {
|
|
state->putnamedrr = ptr;
|
|
}
|
|
if (strcmp(helper_name, "writeable_zone") == 0) {
|
|
state->writeable_zone = ptr;
|
|
}
|
|
}
|
|
|
|
/*
|
|
format a record for bind9
|
|
*/
|
|
static bool b9_format(struct dlz_bind9_data *state,
|
|
TALLOC_CTX *mem_ctx,
|
|
struct dnsp_DnssrvRpcRecord *rec,
|
|
const char **type, const char **data)
|
|
{
|
|
switch (rec->wType) {
|
|
case DNS_TYPE_A:
|
|
*type = "a";
|
|
*data = rec->data.ipv4;
|
|
break;
|
|
|
|
case DNS_TYPE_AAAA:
|
|
*type = "aaaa";
|
|
*data = rec->data.ipv6;
|
|
break;
|
|
|
|
case DNS_TYPE_CNAME:
|
|
*type = "cname";
|
|
*data = rec->data.cname;
|
|
break;
|
|
|
|
case DNS_TYPE_TXT:
|
|
*type = "txt";
|
|
*data = rec->data.txt;
|
|
break;
|
|
|
|
case DNS_TYPE_PTR:
|
|
*type = "ptr";
|
|
*data = rec->data.ptr;
|
|
break;
|
|
|
|
case DNS_TYPE_SRV:
|
|
*type = "srv";
|
|
*data = talloc_asprintf(mem_ctx, "%u %u %u %s",
|
|
rec->data.srv.wPriority,
|
|
rec->data.srv.wWeight,
|
|
rec->data.srv.wPort,
|
|
rec->data.srv.nameTarget);
|
|
break;
|
|
|
|
case DNS_TYPE_MX:
|
|
*type = "mx";
|
|
*data = talloc_asprintf(mem_ctx, "%u %s",
|
|
rec->data.mx.wPriority,
|
|
rec->data.mx.nameTarget);
|
|
break;
|
|
|
|
case DNS_TYPE_HINFO:
|
|
*type = "hinfo";
|
|
*data = talloc_asprintf(mem_ctx, "%s %s",
|
|
rec->data.hinfo.cpu,
|
|
rec->data.hinfo.os);
|
|
break;
|
|
|
|
case DNS_TYPE_NS:
|
|
*type = "ns";
|
|
*data = rec->data.ns;
|
|
break;
|
|
|
|
case DNS_TYPE_SOA: {
|
|
const char *mname;
|
|
*type = "soa";
|
|
|
|
/* we need to fake the authoritative nameserver to
|
|
* point at ourselves. This is how AD DNS servers
|
|
* force clients to send updates to the right local DC
|
|
*/
|
|
mname = talloc_asprintf(mem_ctx, "%s.%s",
|
|
lpcfg_netbios_name(state->lp), lpcfg_dnsdomain(state->lp));
|
|
if (mname == NULL) {
|
|
return false;
|
|
}
|
|
mname = strlower_talloc(mem_ctx, mname);
|
|
if (mname == NULL) {
|
|
return false;
|
|
}
|
|
|
|
state->soa_serial = rec->data.soa.serial;
|
|
|
|
*data = talloc_asprintf(mem_ctx, "%s %s %u %u %u %u %u",
|
|
mname,
|
|
rec->data.soa.rname,
|
|
rec->data.soa.serial,
|
|
rec->data.soa.refresh,
|
|
rec->data.soa.retry,
|
|
rec->data.soa.expire,
|
|
rec->data.soa.minimum);
|
|
break;
|
|
}
|
|
|
|
default:
|
|
state->log(ISC_LOG_ERROR, "samba b9_putrr: unhandled record type %u",
|
|
rec->wType);
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
static const struct {
|
|
enum dns_record_type dns_type;
|
|
const char *typestr;
|
|
bool single_valued;
|
|
} dns_typemap[] = {
|
|
{ DNS_TYPE_A, "A" , false},
|
|
{ DNS_TYPE_AAAA, "AAAA" , false},
|
|
{ DNS_TYPE_CNAME, "CNAME" , true},
|
|
{ DNS_TYPE_TXT, "TXT" , false},
|
|
{ DNS_TYPE_PTR, "PTR" , false},
|
|
{ DNS_TYPE_SRV, "SRV" , false},
|
|
{ DNS_TYPE_MX, "MX" , false},
|
|
{ DNS_TYPE_HINFO, "HINFO" , false},
|
|
{ DNS_TYPE_NS, "NS" , false},
|
|
{ DNS_TYPE_SOA, "SOA" , true},
|
|
};
|
|
|
|
|
|
/*
|
|
see if a DNS type is single valued
|
|
*/
|
|
static bool b9_single_valued(enum dns_record_type dns_type)
|
|
{
|
|
int i;
|
|
for (i=0; i<ARRAY_SIZE(dns_typemap); i++) {
|
|
if (dns_typemap[i].dns_type == dns_type) {
|
|
return dns_typemap[i].single_valued;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/*
|
|
see if a DNS type is single valued
|
|
*/
|
|
static bool b9_dns_type(const char *type, enum dns_record_type *dtype)
|
|
{
|
|
int i;
|
|
for (i=0; i<ARRAY_SIZE(dns_typemap); i++) {
|
|
if (strcasecmp(dns_typemap[i].typestr, type) == 0) {
|
|
*dtype = dns_typemap[i].dns_type;
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
|
|
#define DNS_PARSE_STR(ret, str, sep, saveptr) do { \
|
|
(ret) = strtok_r(str, sep, &saveptr); \
|
|
if ((ret) == NULL) return false; \
|
|
} while (0)
|
|
|
|
#define DNS_PARSE_UINT(ret, str, sep, saveptr) do { \
|
|
char *istr = strtok_r(str, sep, &saveptr); \
|
|
if ((istr) == NULL) return false; \
|
|
(ret) = strtoul(istr, NULL, 10); \
|
|
} while (0)
|
|
|
|
/*
|
|
parse a record from bind9
|
|
*/
|
|
static bool b9_parse(struct dlz_bind9_data *state,
|
|
const char *rdatastr,
|
|
struct dnsp_DnssrvRpcRecord *rec)
|
|
{
|
|
char *full_name, *dclass, *type;
|
|
char *str, *saveptr=NULL;
|
|
int i;
|
|
|
|
str = talloc_strdup(rec, rdatastr);
|
|
if (str == NULL) {
|
|
return false;
|
|
}
|
|
|
|
/* parse the SDLZ string form */
|
|
DNS_PARSE_STR(full_name, str, "\t", saveptr);
|
|
DNS_PARSE_UINT(rec->dwTtlSeconds, NULL, "\t", saveptr);
|
|
DNS_PARSE_STR(dclass, NULL, "\t", saveptr);
|
|
DNS_PARSE_STR(type, NULL, "\t", saveptr);
|
|
|
|
/* construct the record */
|
|
for (i=0; i<ARRAY_SIZE(dns_typemap); i++) {
|
|
if (strcasecmp(type, dns_typemap[i].typestr) == 0) {
|
|
rec->wType = dns_typemap[i].dns_type;
|
|
break;
|
|
}
|
|
}
|
|
if (i == ARRAY_SIZE(dns_typemap)) {
|
|
state->log(ISC_LOG_ERROR, "samba_dlz: unsupported record type '%s' for '%s'",
|
|
type, full_name);
|
|
return false;
|
|
}
|
|
|
|
switch (rec->wType) {
|
|
case DNS_TYPE_A:
|
|
DNS_PARSE_STR(rec->data.ipv4, NULL, " ", saveptr);
|
|
break;
|
|
|
|
case DNS_TYPE_AAAA:
|
|
DNS_PARSE_STR(rec->data.ipv6, NULL, " ", saveptr);
|
|
break;
|
|
|
|
case DNS_TYPE_CNAME:
|
|
DNS_PARSE_STR(rec->data.cname, NULL, " ", saveptr);
|
|
break;
|
|
|
|
case DNS_TYPE_TXT:
|
|
DNS_PARSE_STR(rec->data.txt, NULL, "\t", saveptr);
|
|
break;
|
|
|
|
case DNS_TYPE_PTR:
|
|
DNS_PARSE_STR(rec->data.ptr, NULL, " ", saveptr);
|
|
break;
|
|
|
|
case DNS_TYPE_SRV:
|
|
DNS_PARSE_UINT(rec->data.srv.wPriority, NULL, " ", saveptr);
|
|
DNS_PARSE_UINT(rec->data.srv.wWeight, NULL, " ", saveptr);
|
|
DNS_PARSE_UINT(rec->data.srv.wPort, NULL, " ", saveptr);
|
|
DNS_PARSE_STR(rec->data.srv.nameTarget, NULL, " ", saveptr);
|
|
break;
|
|
|
|
case DNS_TYPE_MX:
|
|
DNS_PARSE_UINT(rec->data.mx.wPriority, NULL, " ", saveptr);
|
|
DNS_PARSE_STR(rec->data.mx.nameTarget, NULL, " ", saveptr);
|
|
break;
|
|
|
|
case DNS_TYPE_HINFO:
|
|
DNS_PARSE_STR(rec->data.hinfo.cpu, NULL, " ", saveptr);
|
|
DNS_PARSE_STR(rec->data.hinfo.os, NULL, " ", saveptr);
|
|
break;
|
|
|
|
case DNS_TYPE_NS:
|
|
DNS_PARSE_STR(rec->data.ns, NULL, " ", saveptr);
|
|
break;
|
|
|
|
case DNS_TYPE_SOA:
|
|
DNS_PARSE_STR(rec->data.soa.mname, NULL, " ", saveptr);
|
|
DNS_PARSE_STR(rec->data.soa.rname, NULL, " ", saveptr);
|
|
DNS_PARSE_UINT(rec->data.soa.serial, NULL, " ", saveptr);
|
|
DNS_PARSE_UINT(rec->data.soa.refresh, NULL, " ", saveptr);
|
|
DNS_PARSE_UINT(rec->data.soa.retry, NULL, " ", saveptr);
|
|
DNS_PARSE_UINT(rec->data.soa.expire, NULL, " ", saveptr);
|
|
DNS_PARSE_UINT(rec->data.soa.minimum, NULL, " ", saveptr);
|
|
break;
|
|
|
|
default:
|
|
state->log(ISC_LOG_ERROR, "samba b9_parse: unhandled record type %u",
|
|
rec->wType);
|
|
return false;
|
|
}
|
|
|
|
/* we should be at the end of the buffer now */
|
|
if (strtok_r(NULL, "\t ", &saveptr) != NULL) {
|
|
state->log(ISC_LOG_ERROR, "samba b9_parse: expected data at end of string for '%s'");
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/*
|
|
send a resource recond to bind9
|
|
*/
|
|
static isc_result_t b9_putrr(struct dlz_bind9_data *state,
|
|
void *handle, struct dnsp_DnssrvRpcRecord *rec,
|
|
const char **types)
|
|
{
|
|
isc_result_t result;
|
|
const char *type, *data;
|
|
TALLOC_CTX *tmp_ctx = talloc_new(state);
|
|
|
|
if (!b9_format(state, tmp_ctx, rec, &type, &data)) {
|
|
return ISC_R_FAILURE;
|
|
}
|
|
|
|
if (data == NULL) {
|
|
talloc_free(tmp_ctx);
|
|
return ISC_R_NOMEMORY;
|
|
}
|
|
|
|
if (types) {
|
|
int i;
|
|
for (i=0; types[i]; i++) {
|
|
if (strcmp(types[i], type) == 0) break;
|
|
}
|
|
if (types[i] == NULL) {
|
|
/* skip it */
|
|
return ISC_R_SUCCESS;
|
|
}
|
|
}
|
|
|
|
result = state->putrr(handle, type, rec->dwTtlSeconds, data);
|
|
if (result != ISC_R_SUCCESS) {
|
|
state->log(ISC_LOG_ERROR, "Failed to put rr");
|
|
}
|
|
talloc_free(tmp_ctx);
|
|
return result;
|
|
}
|
|
|
|
|
|
/*
|
|
send a named resource recond to bind9
|
|
*/
|
|
static isc_result_t b9_putnamedrr(struct dlz_bind9_data *state,
|
|
void *handle, const char *name,
|
|
struct dnsp_DnssrvRpcRecord *rec)
|
|
{
|
|
isc_result_t result;
|
|
const char *type, *data;
|
|
TALLOC_CTX *tmp_ctx = talloc_new(state);
|
|
|
|
if (!b9_format(state, tmp_ctx, rec, &type, &data)) {
|
|
return ISC_R_FAILURE;
|
|
}
|
|
|
|
if (data == NULL) {
|
|
talloc_free(tmp_ctx);
|
|
return ISC_R_NOMEMORY;
|
|
}
|
|
|
|
result = state->putnamedrr(handle, name, type, rec->dwTtlSeconds, data);
|
|
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, 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, (const char **)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;
|
|
}
|
|
|
|
|
|
/*
|
|
called to initialise the driver
|
|
*/
|
|
_PUBLIC_ isc_result_t dlz_create(const char *dlzname,
|
|
unsigned int argc, char *argv[],
|
|
void **dbdata, ...)
|
|
{
|
|
struct dlz_bind9_data *state;
|
|
const char *helper_name;
|
|
va_list ap;
|
|
isc_result_t result;
|
|
TALLOC_CTX *tmp_ctx;
|
|
struct ldb_dn *dn;
|
|
NTSTATUS nt_status;
|
|
|
|
state = talloc_zero(NULL, struct dlz_bind9_data);
|
|
if (state == NULL) {
|
|
return ISC_R_NOMEMORY;
|
|
}
|
|
|
|
tmp_ctx = talloc_new(state);
|
|
|
|
/* 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 */
|
|
setup_logging("samba_dlz", DEBUG_DEFAULT_STDERR);
|
|
|
|
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->ev_ctx, state->lp, &state->smb_krb5_ctx) != 0) {
|
|
result = ISC_R_NOMEMORY;
|
|
goto failed;
|
|
}
|
|
|
|
nt_status = gensec_init();
|
|
if (!NT_STATUS_IS_OK(nt_status)) {
|
|
talloc_free(tmp_ctx);
|
|
return false;
|
|
}
|
|
|
|
if (state->options.url == NULL) {
|
|
state->options.url = lpcfg_private_path(state, state->lp, "dns/sam.ldb");
|
|
if (state->options.url == NULL) {
|
|
result = ISC_R_NOMEMORY;
|
|
goto failed;
|
|
}
|
|
}
|
|
|
|
state->samdb = samdb_connect_url(state, state->ev_ctx, state->lp,
|
|
system_session(state->lp), 0, state->options.url);
|
|
if (state->samdb == NULL) {
|
|
state->log(ISC_LOG_ERROR, "samba_dlz: Failed to connect to %s",
|
|
state->options.url);
|
|
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));
|
|
|
|
*dbdata = state;
|
|
|
|
talloc_free(tmp_ctx);
|
|
return ISC_R_SUCCESS;
|
|
|
|
failed:
|
|
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);
|
|
state->log(ISC_LOG_INFO, "samba_dlz: shutting down");
|
|
talloc_free(state);
|
|
}
|
|
|
|
|
|
/*
|
|
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++) {
|
|
struct ldb_dn *dn;
|
|
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, "DC=%s,%s", zone_name, zone_prefixes[i])) {
|
|
talloc_free(tmp_ctx);
|
|
return ISC_R_NOMEMORY;
|
|
}
|
|
|
|
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) {
|
|
/* 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=@");
|
|
} else {
|
|
ret = ldb_dn_add_child_fmt(*dn, "DC=%.*s", (int)(p-name)-1, name);
|
|
}
|
|
if (!ret) {
|
|
talloc_free(*dn);
|
|
return ISC_R_NOMEMORY;
|
|
}
|
|
return ISC_R_SUCCESS;
|
|
}
|
|
p = strchr(p, '.');
|
|
if (p == NULL) {
|
|
break;
|
|
}
|
|
p++;
|
|
}
|
|
return ISC_R_NOTFOUND;
|
|
}
|
|
|
|
|
|
/*
|
|
see if we handle a given zone
|
|
*/
|
|
_PUBLIC_ isc_result_t dlz_findzonedb(void *dbdata, const char *name)
|
|
{
|
|
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);
|
|
const char *attrs[] = { "dnsRecord", NULL };
|
|
int ret = LDB_SUCCESS, i;
|
|
struct ldb_result *res;
|
|
struct ldb_message_element *el;
|
|
struct ldb_dn *dn;
|
|
|
|
for (i=0; zone_prefixes[i]; i++) {
|
|
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, "DC=%s,DC=%s,%s", name, zone, zone_prefixes[i])) {
|
|
talloc_free(tmp_ctx);
|
|
return ISC_R_NOMEMORY;
|
|
}
|
|
|
|
ret = ldb_search(state->samdb, tmp_ctx, &res, dn, LDB_SCOPE_BASE,
|
|
attrs, "objectClass=dnsNode");
|
|
if (ret == LDB_SUCCESS) {
|
|
break;
|
|
}
|
|
}
|
|
if (ret != LDB_SUCCESS) {
|
|
talloc_free(tmp_ctx);
|
|
return ISC_R_NOTFOUND;
|
|
}
|
|
|
|
el = ldb_msg_find_element(res->msgs[0], "dnsRecord");
|
|
if (el == NULL || el->num_values == 0) {
|
|
talloc_free(tmp_ctx);
|
|
return ISC_R_NOTFOUND;
|
|
}
|
|
|
|
for (i=0; i<el->num_values; i++) {
|
|
struct dnsp_DnssrvRpcRecord rec;
|
|
enum ndr_err_code ndr_err;
|
|
isc_result_t result;
|
|
|
|
ndr_err = ndr_pull_struct_blob(&el->values[i], tmp_ctx, &rec,
|
|
(ndr_pull_flags_fn_t)ndr_pull_dnsp_DnssrvRpcRecord);
|
|
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
|
|
state->log(ISC_LOG_ERROR, "samba_dlz: failed to parse dnsRecord for %s",
|
|
ldb_dn_get_linearized(dn));
|
|
talloc_free(tmp_ctx);
|
|
return ISC_R_FAILURE;
|
|
}
|
|
|
|
result = b9_putrr(state, lookup, &rec, types);
|
|
if (result != ISC_R_SUCCESS) {
|
|
talloc_free(tmp_ctx);
|
|
return result;
|
|
}
|
|
}
|
|
|
|
talloc_free(tmp_ctx);
|
|
return ISC_R_SUCCESS;
|
|
}
|
|
|
|
/*
|
|
lookup one record
|
|
*/
|
|
_PUBLIC_ isc_result_t dlz_lookup(const char *zone, const char *name,
|
|
void *dbdata, dns_sdlzlookup_t *lookup)
|
|
{
|
|
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 */
|
|
return dlz_findzonedb(dbdata, name);
|
|
}
|
|
|
|
/*
|
|
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_SUCCESS, i, j;
|
|
struct ldb_dn *dn;
|
|
struct ldb_result *res;
|
|
TALLOC_CTX *tmp_ctx = talloc_new(state);
|
|
|
|
for (i=0; zone_prefixes[i]; i++) {
|
|
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, "DC=%s,%s", zone, 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=dnsNode");
|
|
if (ret == LDB_SUCCESS) {
|
|
break;
|
|
}
|
|
}
|
|
if (ret != LDB_SUCCESS) {
|
|
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;
|
|
|
|
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);
|
|
}
|
|
if (name == NULL) {
|
|
talloc_free(tmp_ctx);
|
|
return ISC_R_NOMEMORY;
|
|
}
|
|
|
|
for (j=0; j<el->num_values; j++) {
|
|
struct dnsp_DnssrvRpcRecord rec;
|
|
enum ndr_err_code ndr_err;
|
|
isc_result_t result;
|
|
|
|
ndr_err = ndr_pull_struct_blob(&el->values[j], el_ctx, &rec,
|
|
(ndr_pull_flags_fn_t)ndr_pull_dnsp_DnssrvRpcRecord);
|
|
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
|
|
state->log(ISC_LOG_ERROR, "samba_dlz: failed to parse dnsRecord for %s",
|
|
ldb_dn_get_linearized(dn));
|
|
continue;
|
|
}
|
|
|
|
result = b9_putnamedrr(state, allnodes, name, &rec);
|
|
if (result != ISC_R_SUCCESS) {
|
|
continue;
|
|
}
|
|
}
|
|
}
|
|
|
|
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)
|
|
{
|
|
const char *attrs[] = { "dnsRecord", NULL };
|
|
struct ldb_result *res;
|
|
struct ldb_message_element *el;
|
|
TALLOC_CTX *tmp_ctx = talloc_new(state);
|
|
int ret, i;
|
|
|
|
if (!ldb_dn_add_child_fmt(dn, "DC=@,DC=%s", zone)) {
|
|
talloc_free(tmp_ctx);
|
|
return false;
|
|
}
|
|
|
|
ret = ldb_search(state->samdb, tmp_ctx, &res, dn, LDB_SCOPE_BASE,
|
|
attrs, "objectClass=dnsNode");
|
|
if (ret != LDB_SUCCESS) {
|
|
talloc_free(tmp_ctx);
|
|
return false;
|
|
}
|
|
|
|
el = ldb_msg_find_element(res->msgs[0], "dnsRecord");
|
|
if (el == NULL) {
|
|
talloc_free(tmp_ctx);
|
|
return false;
|
|
}
|
|
for (i=0; i<el->num_values; i++) {
|
|
struct dnsp_DnssrvRpcRecord rec;
|
|
enum ndr_err_code ndr_err;
|
|
|
|
ndr_err = ndr_pull_struct_blob(&el->values[i], tmp_ctx, &rec,
|
|
(ndr_pull_flags_fn_t)ndr_pull_dnsp_DnssrvRpcRecord);
|
|
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
|
|
continue;
|
|
}
|
|
if (rec.wType == DNS_TYPE_SOA) {
|
|
talloc_free(tmp_ctx);
|
|
return true;
|
|
}
|
|
}
|
|
|
|
talloc_free(tmp_ctx);
|
|
return false;
|
|
}
|
|
|
|
/*
|
|
configure a writeable zone
|
|
*/
|
|
_PUBLIC_ isc_result_t dlz_configure(dns_view_t *view, void *dbdata)
|
|
{
|
|
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;
|
|
}
|
|
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;
|
|
}
|
|
result = state->writeable_zone(view, zone);
|
|
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;
|
|
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;
|
|
|
|
/* 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 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 false;
|
|
}
|
|
|
|
cli_credentials_set_krb5_context(server_credentials, state->smb_krb5_ctx);
|
|
cli_credentials_set_conf(server_credentials, state->lp);
|
|
|
|
keytab_name = talloc_asprintf(tmp_ctx, "file:%s/dns.keytab",
|
|
lpcfg_private_dir(state->lp));
|
|
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 false;
|
|
}
|
|
talloc_free(keytab_name);
|
|
|
|
nt_status = gensec_server_start(tmp_ctx,
|
|
lpcfg_gensec_settings(tmp_ctx, state->lp),
|
|
NULL, &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 false;
|
|
}
|
|
|
|
gensec_set_credentials(gensec_ctx, server_credentials);
|
|
|
|
nt_status = gensec_start_mech_by_name(gensec_ctx, "spnego");
|
|
if (!NT_STATUS_IS_OK(nt_status)) {
|
|
state->log(ISC_LOG_ERROR, "samba_dlz: failed to start spnego");
|
|
talloc_free(tmp_ctx);
|
|
return false;
|
|
}
|
|
|
|
nt_status = gensec_update(gensec_ctx, tmp_ctx, state->ev_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 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 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 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 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 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 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 true;
|
|
}
|
|
|
|
|
|
/*
|
|
add a new record
|
|
*/
|
|
static isc_result_t b9_add_record(struct dlz_bind9_data *state, const char *name,
|
|
struct ldb_dn *dn,
|
|
struct dnsp_DnssrvRpcRecord *rec)
|
|
{
|
|
struct ldb_message *msg;
|
|
enum ndr_err_code ndr_err;
|
|
struct ldb_val v;
|
|
int ret;
|
|
|
|
msg = ldb_msg_new(rec);
|
|
if (msg == NULL) {
|
|
return ISC_R_NOMEMORY;
|
|
}
|
|
msg->dn = dn;
|
|
ret = ldb_msg_add_string(msg, "objectClass", "dnsNode");
|
|
if (ret != LDB_SUCCESS) {
|
|
return ISC_R_FAILURE;
|
|
}
|
|
|
|
ndr_err = ndr_push_struct_blob(&v, rec, rec, (ndr_push_flags_fn_t)ndr_push_dnsp_DnssrvRpcRecord);
|
|
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
|
|
return ISC_R_FAILURE;
|
|
}
|
|
ret = ldb_msg_add_value(msg, "dnsRecord", &v, NULL);
|
|
if (ret != LDB_SUCCESS) {
|
|
return ISC_R_FAILURE;
|
|
}
|
|
|
|
ret = ldb_add(state->samdb, msg);
|
|
if (ret != LDB_SUCCESS) {
|
|
return ISC_R_FAILURE;
|
|
}
|
|
|
|
return ISC_R_SUCCESS;
|
|
}
|
|
|
|
/*
|
|
see if two DNS names are the same
|
|
*/
|
|
static bool dns_name_equal(const char *name1, const char *name2)
|
|
{
|
|
size_t len1 = strlen(name1);
|
|
size_t len2 = strlen(name2);
|
|
if (name1[len1-1] == '.') len1--;
|
|
if (name2[len2-1] == '.') len2--;
|
|
if (len1 != len2) {
|
|
return false;
|
|
}
|
|
return strncasecmp_m(name1, name2, len1) == 0;
|
|
}
|
|
|
|
|
|
/*
|
|
see if two dns records match
|
|
*/
|
|
static bool b9_record_match(struct dlz_bind9_data *state,
|
|
struct dnsp_DnssrvRpcRecord *rec1, struct dnsp_DnssrvRpcRecord *rec2)
|
|
{
|
|
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:
|
|
return strcmp(rec1->data.ipv6, rec2->data.ipv6) == 0;
|
|
case DNS_TYPE_CNAME:
|
|
return dns_name_equal(rec1->data.cname, rec2->data.cname);
|
|
case DNS_TYPE_TXT:
|
|
return strcmp(rec1->data.txt, rec2->data.txt) == 0;
|
|
case DNS_TYPE_PTR:
|
|
return strcmp(rec1->data.ptr, rec2->data.ptr) == 0;
|
|
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 b9_putrr: 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 not updating the client specified name */
|
|
if (strcmp(state->update_name, name) != 0) {
|
|
return true;
|
|
}
|
|
|
|
ret = ldb_set_opaque(state->samdb, "sessionInfo", 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, "sessionInfo", 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;
|
|
struct ldb_result *res;
|
|
const char *attrs[] = { "dnsRecord", NULL };
|
|
int ret, i;
|
|
struct ldb_message_element *el;
|
|
enum ndr_err_code ndr_err;
|
|
NTTIME t;
|
|
|
|
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;
|
|
}
|
|
|
|
unix_to_nt_time(&t, time(NULL));
|
|
t /= 10*1000*1000; /* convert to seconds (NT time is in 100ns units) */
|
|
t /= 3600; /* convert to hours */
|
|
|
|
rec->rank = DNS_RANK_ZONE;
|
|
rec->dwSerial = state->soa_serial;
|
|
rec->dwTimeStamp = (uint32_t)t;
|
|
|
|
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 */
|
|
ret = ldb_search(state->samdb, rec, &res, dn, LDB_SCOPE_BASE, attrs, "objectClass=dnsNode");
|
|
if (ret == LDB_ERR_NO_SUCH_OBJECT) {
|
|
if (!b9_set_session_info(state, name)) {
|
|
talloc_free(rec);
|
|
return ISC_R_FAILURE;
|
|
}
|
|
result = b9_add_record(state, name, dn, rec);
|
|
b9_reset_session_info(state);
|
|
talloc_free(rec);
|
|
if (result == ISC_R_SUCCESS) {
|
|
state->log(ISC_LOG_ERROR, "samba_dlz: added %s %s", name, rdatastr);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/* there are existing records. We need to see if this will
|
|
* replace a record or add to it
|
|
*/
|
|
el = ldb_msg_find_element(res->msgs[0], "dnsRecord");
|
|
if (el == NULL) {
|
|
state->log(ISC_LOG_ERROR, "samba_dlz: no dnsRecord attribute for %s",
|
|
ldb_dn_get_linearized(dn));
|
|
talloc_free(rec);
|
|
return ISC_R_FAILURE;
|
|
}
|
|
|
|
for (i=0; i<el->num_values; i++) {
|
|
struct dnsp_DnssrvRpcRecord rec2;
|
|
|
|
ndr_err = ndr_pull_struct_blob(&el->values[i], rec, &rec2,
|
|
(ndr_pull_flags_fn_t)ndr_pull_dnsp_DnssrvRpcRecord);
|
|
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
|
|
state->log(ISC_LOG_ERROR, "samba_dlz: failed to parse dnsRecord for %s",
|
|
ldb_dn_get_linearized(dn));
|
|
talloc_free(rec);
|
|
return ISC_R_FAILURE;
|
|
}
|
|
|
|
if (b9_record_match(state, rec, &rec2)) {
|
|
break;
|
|
}
|
|
}
|
|
if (i == el->num_values) {
|
|
/* adding a new value */
|
|
el->values = talloc_realloc(el, el->values, struct ldb_val, el->num_values+1);
|
|
if (el->values == NULL) {
|
|
talloc_free(rec);
|
|
return ISC_R_NOMEMORY;
|
|
}
|
|
el->num_values++;
|
|
}
|
|
|
|
ndr_err = ndr_push_struct_blob(&el->values[i], rec, rec,
|
|
(ndr_push_flags_fn_t)ndr_push_dnsp_DnssrvRpcRecord);
|
|
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
|
|
state->log(ISC_LOG_ERROR, "samba_dlz: failed to push dnsRecord for %s",
|
|
ldb_dn_get_linearized(dn));
|
|
talloc_free(rec);
|
|
return ISC_R_FAILURE;
|
|
}
|
|
|
|
|
|
if (!b9_set_session_info(state, name)) {
|
|
talloc_free(rec);
|
|
return ISC_R_FAILURE;
|
|
}
|
|
|
|
/* modify the record */
|
|
el->flags = LDB_FLAG_MOD_REPLACE;
|
|
ret = ldb_modify(state->samdb, res->msgs[0]);
|
|
b9_reset_session_info(state);
|
|
if (ret != LDB_SUCCESS) {
|
|
state->log(ISC_LOG_ERROR, "samba_dlz: failed to modify %s - %s",
|
|
ldb_dn_get_linearized(dn), ldb_errstring(state->samdb));
|
|
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 ldb_result *res;
|
|
const char *attrs[] = { "dnsRecord", NULL };
|
|
int ret, i;
|
|
struct ldb_message_element *el;
|
|
enum ndr_err_code ndr_err;
|
|
|
|
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;
|
|
}
|
|
|
|
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 the existing records */
|
|
ret = ldb_search(state->samdb, rec, &res, dn, LDB_SCOPE_BASE, attrs, "objectClass=dnsNode");
|
|
if (ret == LDB_ERR_NO_SUCH_OBJECT) {
|
|
talloc_free(rec);
|
|
return ISC_R_NOTFOUND;
|
|
}
|
|
|
|
/* there are existing records. We need to see if any match
|
|
*/
|
|
el = ldb_msg_find_element(res->msgs[0], "dnsRecord");
|
|
if (el == NULL || el->num_values == 0) {
|
|
state->log(ISC_LOG_ERROR, "samba_dlz: no dnsRecord attribute for %s",
|
|
ldb_dn_get_linearized(dn));
|
|
talloc_free(rec);
|
|
return ISC_R_FAILURE;
|
|
}
|
|
|
|
for (i=0; i<el->num_values; i++) {
|
|
struct dnsp_DnssrvRpcRecord rec2;
|
|
|
|
ndr_err = ndr_pull_struct_blob(&el->values[i], rec, &rec2,
|
|
(ndr_pull_flags_fn_t)ndr_pull_dnsp_DnssrvRpcRecord);
|
|
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
|
|
state->log(ISC_LOG_ERROR, "samba_dlz: failed to parse dnsRecord for %s",
|
|
ldb_dn_get_linearized(dn));
|
|
talloc_free(rec);
|
|
return ISC_R_FAILURE;
|
|
}
|
|
|
|
if (b9_record_match(state, rec, &rec2)) {
|
|
break;
|
|
}
|
|
}
|
|
if (i == el->num_values) {
|
|
talloc_free(rec);
|
|
return ISC_R_NOTFOUND;
|
|
}
|
|
|
|
if (i < el->num_values-1) {
|
|
memmove(&el->values[i], &el->values[i+1], sizeof(el->values[0])*((el->num_values-1)-i));
|
|
}
|
|
el->num_values--;
|
|
|
|
if (!b9_set_session_info(state, name)) {
|
|
talloc_free(rec);
|
|
return ISC_R_FAILURE;
|
|
}
|
|
|
|
if (el->num_values == 0) {
|
|
/* delete the record */
|
|
ret = ldb_delete(state->samdb, dn);
|
|
b9_reset_session_info(state);
|
|
} else {
|
|
/* modify the record */
|
|
el->flags = LDB_FLAG_MOD_REPLACE;
|
|
ret = ldb_modify(state->samdb, res->msgs[0]);
|
|
}
|
|
b9_reset_session_info(state);
|
|
if (ret != LDB_SUCCESS) {
|
|
state->log(ISC_LOG_ERROR, "samba_dlz: failed to modify %s - %s",
|
|
ldb_dn_get_linearized(dn), ldb_errstring(state->samdb));
|
|
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;
|
|
struct ldb_result *res;
|
|
const char *attrs[] = { "dnsRecord", NULL };
|
|
int ret, i;
|
|
struct ldb_message_element *el;
|
|
enum ndr_err_code ndr_err;
|
|
enum dns_record_type dns_type;
|
|
bool found = false;
|
|
|
|
if (state->transaction_token != (void*)version) {
|
|
state->log(ISC_LOG_INFO, "samba_dlz: bad transaction version");
|
|
return ISC_R_FAILURE;
|
|
}
|
|
|
|
if (!b9_dns_type(type, &dns_type)) {
|
|
state->log(ISC_LOG_INFO, "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 */
|
|
ret = ldb_search(state->samdb, tmp_ctx, &res, dn, LDB_SCOPE_BASE, attrs, "objectClass=dnsNode");
|
|
if (ret == LDB_ERR_NO_SUCH_OBJECT) {
|
|
talloc_free(tmp_ctx);
|
|
return ISC_R_NOTFOUND;
|
|
}
|
|
|
|
/* there are existing records. We need to see if any match the type
|
|
*/
|
|
el = ldb_msg_find_element(res->msgs[0], "dnsRecord");
|
|
if (el == NULL || el->num_values == 0) {
|
|
talloc_free(tmp_ctx);
|
|
return ISC_R_NOTFOUND;
|
|
}
|
|
|
|
for (i=0; i<el->num_values; i++) {
|
|
struct dnsp_DnssrvRpcRecord rec2;
|
|
|
|
ndr_err = ndr_pull_struct_blob(&el->values[i], tmp_ctx, &rec2,
|
|
(ndr_pull_flags_fn_t)ndr_pull_dnsp_DnssrvRpcRecord);
|
|
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
|
|
state->log(ISC_LOG_ERROR, "samba_dlz: failed to parse dnsRecord for %s",
|
|
ldb_dn_get_linearized(dn));
|
|
talloc_free(tmp_ctx);
|
|
return ISC_R_FAILURE;
|
|
}
|
|
|
|
if (dns_type == rec2.wType) {
|
|
if (i < el->num_values-1) {
|
|
memmove(&el->values[i], &el->values[i+1],
|
|
sizeof(el->values[0])*((el->num_values-1)-i));
|
|
}
|
|
el->num_values--;
|
|
i--;
|
|
found = true;
|
|
}
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
if (el->num_values == 0) {
|
|
/* delete the record */
|
|
ret = ldb_delete(state->samdb, dn);
|
|
} else {
|
|
/* modify the record */
|
|
el->flags = LDB_FLAG_MOD_REPLACE;
|
|
ret = ldb_modify(state->samdb, res->msgs[0]);
|
|
}
|
|
b9_reset_session_info(state);
|
|
if (ret != LDB_SUCCESS) {
|
|
state->log(ISC_LOG_ERROR, "samba_dlz: failed to delete type %s in %s - %s",
|
|
type, ldb_dn_get_linearized(dn), ldb_errstring(state->samdb));
|
|
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;
|
|
}
|