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9c2fcb689b
This makes us scale better with many simultaneous winbind requests, some of which might be slow. This implementation breaks offline logons, as the cached credentials are maintained in a child (this needs fixing). So, if the offline logons are active, only allow one DC connection. Probably the offline logon and the scalable file server cases are separate enough so that this patch is useful even with the restriction.
116 lines
3.3 KiB
C
116 lines
3.3 KiB
C
/*
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Unix SMB/CIFS implementation.
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async dsgetdcname
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Copyright (C) Volker Lendecke 2009
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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 "winbindd.h"
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#include "librpc/gen_ndr/ndr_wbint_c.h"
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struct wb_dsgetdcname_state {
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struct netr_DsRGetDCNameInfo *dcinfo;
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};
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static void wb_dsgetdcname_done(struct tevent_req *subreq);
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struct tevent_req *wb_dsgetdcname_send(TALLOC_CTX *mem_ctx,
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struct tevent_context *ev,
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const char *domain_name,
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const struct GUID *domain_guid,
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const char *site_name,
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uint32_t flags)
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{
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struct tevent_req *req, *subreq;
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struct wb_dsgetdcname_state *state;
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struct winbindd_child *child;
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struct GUID guid;
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struct GUID *guid_ptr = NULL;
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req = tevent_req_create(mem_ctx, &state, struct wb_dsgetdcname_state);
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if (req == NULL) {
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return NULL;
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}
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if (strequal(domain_name, "BUILTIN")
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|| strequal(domain_name, get_global_sam_name())) {
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/*
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* Two options here: Give back our own address, or say there's
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* nobody around. Right now opting for the latter, one measure
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* to prevent the loopback connects. This might change if
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* needed.
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*/
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tevent_req_nterror(req, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND);
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return tevent_req_post(req, ev);
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}
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if (IS_DC) {
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/*
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* We have to figure out the DC ourselves
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*/
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child = locator_child();
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} else {
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struct winbindd_domain *domain = find_our_domain();
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child = choose_domain_child(domain);
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}
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if (domain_guid != NULL) {
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/* work around a const issue in rpccli_ autogenerated code */
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guid = *domain_guid;
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guid_ptr = &guid;
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}
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subreq = dcerpc_wbint_DsGetDcName_send(
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state, ev, child->binding_handle, domain_name, guid_ptr, site_name,
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flags, &state->dcinfo);
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if (tevent_req_nomem(subreq, req)) {
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return tevent_req_post(req, ev);
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}
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tevent_req_set_callback(subreq, wb_dsgetdcname_done, req);
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return req;
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}
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static void wb_dsgetdcname_done(struct tevent_req *subreq)
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{
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struct tevent_req *req = tevent_req_callback_data(
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subreq, struct tevent_req);
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struct wb_dsgetdcname_state *state = tevent_req_data(
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req, struct wb_dsgetdcname_state);
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NTSTATUS status, result;
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status = dcerpc_wbint_DsGetDcName_recv(subreq, state, &result);
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TALLOC_FREE(subreq);
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if (any_nt_status_not_ok(status, result, &status)) {
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tevent_req_nterror(req, status);
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return;
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}
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tevent_req_done(req);
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}
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NTSTATUS wb_dsgetdcname_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
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struct netr_DsRGetDCNameInfo **pdcinfo)
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{
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struct wb_dsgetdcname_state *state = tevent_req_data(
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req, struct wb_dsgetdcname_state);
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NTSTATUS status;
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if (tevent_req_is_nterror(req, &status)) {
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return status;
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}
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*pdcinfo = talloc_move(mem_ctx, &state->dcinfo);
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return NT_STATUS_OK;
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}
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