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/*
Unix SMB/CIFS implementation.
implement the DRSUpdateRefs call
Copyright (C) Andrew Tridgell 2009
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 "librpc/gen_ndr/ndr_drsuapi.h"
#include "rpc_server/dcerpc_server.h"
#include "rpc_server/common/common.h"
#include "rpc_server/drsuapi/dcesrv_drsuapi.h"
#include "dsdb/samdb/samdb.h"
#include "lib/ldb/include/ldb_errors.h"
#include "param/param.h"
#include "librpc/gen_ndr/ndr_drsblobs.h"
#include "auth/auth.h"
/*
load the repsTo structure for a given partition GUID
*/
static WERROR uref_loadreps(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx, struct GUID *guid,
struct repsTo *reps)
{
struct ldb_dn *dn;
const char *attrs[] = { "repsTo", NULL };
struct ldb_result *res;
const struct ldb_val *v;
TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
if (dsdb_find_dn_by_guid(sam_ctx, tmp_ctx, GUID_string(tmp_ctx, guid), &dn) != LDB_SUCCESS) {
DEBUG(0,("drsuapi_addref: failed to find partition with GUID %s\n",
GUID_string(tmp_ctx, guid)));
talloc_free(tmp_ctx);
return WERR_DS_DRA_BAD_NC;
}
/* TODO: possibly check in the rootDSE to see that this DN is
* one of our partition roots */
if (ldb_search(sam_ctx, tmp_ctx, &res, dn, LDB_SCOPE_BASE, attrs, NULL) != LDB_SUCCESS) {
DEBUG(0,("drsuapi_addref: failed to read partition object\n"));
talloc_free(tmp_ctx);
return WERR_DS_DRA_INTERNAL_ERROR;
}
v = ldb_msg_find_ldb_val(res->msgs[0], "repsTo");
if (v == NULL) {
/* treat as empty empty */
ZERO_STRUCTP(reps);
reps->version = REPSTO_VERSION1;
} else {
enum ndr_err_code ndr_err;
ndr_err = ndr_pull_struct_blob(v, mem_ctx, lp_iconv_convenience(ldb_get_opaque(sam_ctx, "loadparm")),
reps,
(ndr_pull_flags_fn_t)ndr_pull_repsTo);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
talloc_free(tmp_ctx);
return WERR_DS_DRA_INTERNAL_ERROR;
}
}
talloc_free(tmp_ctx);
return WERR_OK;
}
/*
save the repsTo structure for a given partition GUID
*/
static WERROR uref_savereps(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx, struct GUID *guid,
struct repsTo *reps)
{
struct ldb_dn *dn;
struct ldb_val v;
TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
enum ndr_err_code ndr_err;
struct ldb_message *msg;
struct ldb_message_element *el;
if (dsdb_find_dn_by_guid(sam_ctx, tmp_ctx, GUID_string(tmp_ctx, guid), &dn) != LDB_SUCCESS) {
DEBUG(0,("drsuapi_addref: failed to find partition with GUID %s\n",
GUID_string(tmp_ctx, guid)));
talloc_free(tmp_ctx);
return WERR_DS_DRA_BAD_NC;
}
ndr_err = ndr_push_struct_blob(&v, tmp_ctx, lp_iconv_convenience(ldb_get_opaque(sam_ctx, "loadparm")),
reps,
(ndr_push_flags_fn_t)ndr_push_repsTo);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
goto failed;
}
msg = ldb_msg_new(tmp_ctx);
msg->dn = dn;
if (ldb_msg_add_empty(msg, "repsTo", LDB_FLAG_MOD_REPLACE, &el) != LDB_SUCCESS) {
goto failed;
}
el->num_values = 1;
el->values = &v;
if (ldb_modify(sam_ctx, msg) != LDB_SUCCESS) {
DEBUG(0,("Failed to store repsTo - %s\n", ldb_errstring(sam_ctx)));
goto failed;
}
talloc_free(tmp_ctx);
return WERR_OK;
failed:
talloc_free(tmp_ctx);
return WERR_DS_DRA_INTERNAL_ERROR;
}
/*
add a replication destination for a given partition GUID
*/
static WERROR uref_add_dest(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
struct GUID *guid, struct repsToDest *dest)
{
struct repsTo reps;
WERROR werr;
struct repsTov1 *rv1;
werr = uref_loadreps(sam_ctx, mem_ctx, guid, &reps);
if (!W_ERROR_IS_OK(werr)) {
return werr;
}
if (reps.version != REPSTO_VERSION1) {
DEBUG(0,("Wrong version number %u on disk\n",
reps.version));
return WERR_DS_DRA_INTERNAL_ERROR;
}
rv1 = &reps.ctr.r;
rv1->reps = talloc_realloc(mem_ctx, rv1->reps, struct repsToDest, rv1->count+1);
if (rv1->reps == NULL) {
return WERR_DS_DRA_INTERNAL_ERROR;
}
rv1->reps[rv1->count] = *dest;
rv1->count++;
werr = uref_savereps(sam_ctx, mem_ctx, guid, &reps);
if (!W_ERROR_IS_OK(werr)) {
return werr;
}
return WERR_OK;
}
/*
delete a replication destination for a given partition GUID
*/
static WERROR uref_del_dest(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
struct GUID *guid, struct GUID *dest_guid)
{
struct repsTo reps;
WERROR werr;
struct repsTov1 *rv1;
int i;
werr = uref_loadreps(sam_ctx, mem_ctx, guid, &reps);
if (!W_ERROR_IS_OK(werr)) {
return werr;
}
if (reps.version != REPSTO_VERSION1) {
DEBUG(0,("Wrong version number %u on disk\n", reps.version));
return WERR_DS_DRA_INTERNAL_ERROR;
}
rv1 = &reps.ctr.r;
for (i=0; i<rv1->count; i++) {
if (GUID_compare(dest_guid, &rv1->reps[i].dest_guid) == 0) {
if (i+1 < rv1->count) {
memmove(&rv1->reps[i], &rv1->reps[i+1], sizeof(rv1->reps[i])*(rv1->count-(i+1)));
}
rv1->count--;
}
}
werr = uref_savereps(sam_ctx, mem_ctx, guid, &reps);
if (!W_ERROR_IS_OK(werr)) {
return werr;
}
return WERR_OK;
}
/*
drsuapi_DsReplicaUpdateRefs
*/
WERROR dcesrv_drsuapi_DsReplicaUpdateRefs(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx,
struct drsuapi_DsReplicaUpdateRefs *r)
{
struct drsuapi_DsReplicaUpdateRefsRequest1 *req;
struct ldb_context *sam_ctx;
WERROR werr;
if (r->in.level != 1) {
DEBUG(0,("DrReplicUpdateRefs - unsupported level %u\n", r->in.level));
return WERR_DS_DRA_INVALID_PARAMETER;
}
req = &r->in.req.req1;
DEBUG(4,("DrReplicUpdateRefs for host '%s' with GUID %s options 0x%08x nc=%s\n",
req->dest_dsa_dns_name, GUID_string(mem_ctx, &req->dest_dsa_guid),
req->options,
drs_ObjectIdentifier_to_string(mem_ctx, req->naming_context)));
/* TODO: We need to authenticate this operation pretty carefully */
sam_ctx = samdb_connect(mem_ctx, dce_call->event_ctx, dce_call->conn->dce_ctx->lp_ctx,
system_session(mem_ctx, dce_call->conn->dce_ctx->lp_ctx));
if (!sam_ctx) {
return WERR_DS_DRA_INTERNAL_ERROR;
}
if (ldb_transaction_start(sam_ctx) != LDB_SUCCESS) {
DEBUG(0,(__location__ ": Failed to start transaction on samdb\n"));
return WERR_DS_DRA_INTERNAL_ERROR;
}
if (req->options & DRSUAPI_DS_REPLICA_UPDATE_DELETE_REFERENCE) {
werr = uref_del_dest(sam_ctx, mem_ctx, &req->naming_context->guid, &req->dest_dsa_guid);
if (!W_ERROR_IS_OK(werr)) {
DEBUG(0,("Failed to delete repsTo for %s\n",
GUID_string(dce_call, &req->dest_dsa_guid)));
goto failed;
}
}
if (req->options & DRSUAPI_DS_REPLICA_UPDATE_ADD_REFERENCE) {
struct repsToDest dest;
dest.dest_dsa_dns_name = req->dest_dsa_dns_name;
dest.dest_guid = req->dest_dsa_guid;
dest.options = req->options;
werr = uref_add_dest(sam_ctx, mem_ctx, &req->naming_context->guid, &dest);
if (!W_ERROR_IS_OK(werr)) {
DEBUG(0,("Failed to delete repsTo for %s\n",
GUID_string(dce_call, &dest.dest_guid)));
goto failed;
}
}
if (ldb_transaction_commit(sam_ctx) != LDB_SUCCESS) {
DEBUG(0,(__location__ ": Failed to commit transaction on samdb\n"));
return WERR_DS_DRA_INTERNAL_ERROR;
}
talloc_free(sam_ctx);
return WERR_OK;
failed:
ldb_transaction_cancel(sam_ctx);
talloc_free(sam_ctx);
return werr;
}
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