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https://github.com/samba-team/samba.git
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18332a1743
Signed-off-by: Volker Lendecke <vl@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
462 lines
11 KiB
C
462 lines
11 KiB
C
/*
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Unix SMB/CIFS implementation.
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async sids2xids
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Copyright (C) Volker Lendecke 2011
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Copyright (C) Michael Adam 2012
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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 "../libcli/security/security.h"
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#include "idmap_cache.h"
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#include "librpc/gen_ndr/ndr_winbind_c.h"
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#include "librpc/gen_ndr/ndr_netlogon.h"
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#include "lsa.h"
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struct wb_sids2xids_state {
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struct tevent_context *ev;
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struct dom_sid *sids;
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uint32_t num_sids;
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struct id_map *cached;
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struct dom_sid *non_cached;
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uint32_t num_non_cached;
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/*
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* Domain array to use for the idmap call. The output from
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* lookupsids cannot be used directly since for migrated
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* objects the returned domain SID can be different than the
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* original one. The new domain SID cannot be combined with
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* the RID from the previous domain.
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*
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* The proper way would be asking for the correct RID in the
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* new domain, but this approach avoids id mappings for
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* invalid SIDs.
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*/
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struct lsa_RefDomainList idmap_doms;
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uint32_t dom_index;
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struct wbint_TransIDArray *dom_ids;
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struct lsa_RefDomainList idmap_dom;
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bool tried_dclookup;
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struct wbint_TransIDArray ids;
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};
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static bool wb_sids2xids_in_cache(struct dom_sid *sid, struct id_map *map);
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static void wb_sids2xids_lookupsids_done(struct tevent_req *subreq);
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static void wb_sids2xids_done(struct tevent_req *subreq);
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static void wb_sids2xids_gotdc(struct tevent_req *subreq);
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struct tevent_req *wb_sids2xids_send(TALLOC_CTX *mem_ctx,
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struct tevent_context *ev,
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const struct dom_sid *sids,
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const uint32_t num_sids)
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{
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struct tevent_req *req, *subreq;
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struct wb_sids2xids_state *state;
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uint32_t i;
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req = tevent_req_create(mem_ctx, &state,
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struct wb_sids2xids_state);
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if (req == NULL) {
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return NULL;
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}
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state->ev = ev;
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state->num_sids = num_sids;
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state->sids = talloc_zero_array(state, struct dom_sid, num_sids);
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if (tevent_req_nomem(state->sids, req)) {
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return tevent_req_post(req, ev);
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}
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for (i = 0; i < num_sids; i++) {
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sid_copy(&state->sids[i], &sids[i]);
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}
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state->cached = talloc_zero_array(state, struct id_map, num_sids);
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if (tevent_req_nomem(state->cached, req)) {
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return tevent_req_post(req, ev);
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}
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state->non_cached = talloc_array(state, struct dom_sid, num_sids);
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if (tevent_req_nomem(state->non_cached, req)) {
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return tevent_req_post(req, ev);
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}
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/*
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* Extract those sids that can not be resolved from cache
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* into a separate list to be handed to id mapping, keeping
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* the same index.
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*/
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for (i=0; i<state->num_sids; i++) {
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DEBUG(10, ("SID %d: %s\n", (int)i,
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sid_string_dbg(&state->sids[i])));
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if (wb_sids2xids_in_cache(&state->sids[i], &state->cached[i])) {
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continue;
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}
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sid_copy(&state->non_cached[state->num_non_cached],
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&state->sids[i]);
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state->num_non_cached += 1;
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}
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if (state->num_non_cached == 0) {
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tevent_req_done(req);
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return tevent_req_post(req, ev);
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}
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subreq = wb_lookupsids_send(state, ev, state->non_cached,
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state->num_non_cached);
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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_sids2xids_lookupsids_done, req);
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return req;
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}
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static bool wb_sids2xids_in_cache(struct dom_sid *sid, struct id_map *map)
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{
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struct unixid id;
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bool expired;
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if (!winbindd_use_idmap_cache()) {
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return false;
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}
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if (idmap_cache_find_sid2unixid(sid, &id, &expired)) {
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if (expired && is_domain_online(find_our_domain())) {
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return false;
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}
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map->sid = sid;
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map->xid = id;
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map->status = ID_MAPPED;
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return true;
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}
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return false;
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}
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static enum id_type lsa_SidType_to_id_type(const enum lsa_SidType sid_type);
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static struct wbint_TransIDArray *wb_sids2xids_extract_for_domain_index(
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TALLOC_CTX *mem_ctx, const struct wbint_TransIDArray *src,
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uint32_t domain_index);
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static void wb_sids2xids_lookupsids_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_sids2xids_state *state = tevent_req_data(
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req, struct wb_sids2xids_state);
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struct lsa_RefDomainList *domains = NULL;
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struct lsa_TransNameArray *names = NULL;
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struct winbindd_child *child;
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NTSTATUS status;
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int i;
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status = wb_lookupsids_recv(subreq, state, &domains, &names);
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TALLOC_FREE(subreq);
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if (tevent_req_nterror(req, status)) {
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return;
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}
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state->ids.num_ids = state->num_non_cached;
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state->ids.ids = talloc_array(state, struct wbint_TransID,
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state->num_non_cached);
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if (tevent_req_nomem(state->ids.ids, req)) {
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return;
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}
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for (i=0; i<state->num_non_cached; i++) {
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struct dom_sid dom_sid;
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struct lsa_DomainInfo *info;
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struct lsa_TranslatedName *n = &names->names[i];
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struct wbint_TransID *t = &state->ids.ids[i];
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int domain_index;
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sid_copy(&dom_sid, &state->non_cached[i]);
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sid_split_rid(&dom_sid, &t->rid);
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info = &domains->domains[n->sid_index];
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t->type = lsa_SidType_to_id_type(n->sid_type);
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domain_index = init_lsa_ref_domain_list(
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state, &state->idmap_doms, info->name.string, &dom_sid);
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if (domain_index == -1) {
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tevent_req_oom(req);
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return;
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}
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t->domain_index = domain_index;
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t->xid.id = UINT32_MAX;
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t->xid.type = t->type;
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}
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TALLOC_FREE(names);
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TALLOC_FREE(domains);
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child = idmap_child();
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state->dom_ids = wb_sids2xids_extract_for_domain_index(
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state, &state->ids, state->dom_index);
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if (tevent_req_nomem(state->dom_ids, req)) {
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return;
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}
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state->idmap_dom = (struct lsa_RefDomainList) {
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.count = 1,
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.domains = &state->idmap_doms.domains[state->dom_index],
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.max_size = 1
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};
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subreq = dcerpc_wbint_Sids2UnixIDs_send(
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state, state->ev, child->binding_handle, &state->idmap_dom,
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state->dom_ids);
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if (tevent_req_nomem(subreq, req)) {
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return;
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}
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tevent_req_set_callback(subreq, wb_sids2xids_done, req);
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}
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static enum id_type lsa_SidType_to_id_type(const enum lsa_SidType sid_type)
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{
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enum id_type type;
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switch(sid_type) {
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case SID_NAME_COMPUTER:
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case SID_NAME_USER:
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type = ID_TYPE_UID;
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break;
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case SID_NAME_DOM_GRP:
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case SID_NAME_ALIAS:
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case SID_NAME_WKN_GRP:
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type = ID_TYPE_GID;
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break;
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default:
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type = ID_TYPE_NOT_SPECIFIED;
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break;
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}
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return type;
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}
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static void wb_sids2xids_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_sids2xids_state *state = tevent_req_data(
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req, struct wb_sids2xids_state);
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NTSTATUS status, result;
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struct winbindd_child *child;
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struct wbint_TransIDArray *src, *dst;
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uint32_t i, src_idx;
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status = dcerpc_wbint_Sids2UnixIDs_recv(subreq, state, &result);
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TALLOC_FREE(subreq);
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if (tevent_req_nterror(req, status)) {
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return;
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}
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if (NT_STATUS_EQUAL(result, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND) &&
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!state->tried_dclookup) {
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struct lsa_DomainInfo *d;
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d = &state->idmap_doms.domains[state->dom_index];
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subreq = wb_dsgetdcname_send(
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state, state->ev, d->name.string, NULL, NULL,
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DS_RETURN_DNS_NAME);
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if (tevent_req_nomem(subreq, req)) {
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return;
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}
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tevent_req_set_callback(subreq, wb_sids2xids_gotdc, req);
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return;
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}
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src = state->dom_ids;
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src_idx = 0;
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dst = &state->ids;
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if (any_nt_status_not_ok(status, result, &status)) {
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DBG_DEBUG("status=%s, result=%s\n", nt_errstr(status),
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nt_errstr(result));
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/*
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* All we can do here is to report "not mapped"
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*/
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for (i=0; i<src->num_ids; i++) {
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src->ids[i].xid.type = ID_TYPE_NOT_SPECIFIED;
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}
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}
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for (i=0; i<dst->num_ids; i++) {
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if (dst->ids[i].domain_index == state->dom_index) {
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dst->ids[i].type = src->ids[src_idx].type;
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dst->ids[i].xid = src->ids[src_idx].xid;
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src_idx += 1;
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}
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}
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TALLOC_FREE(state->dom_ids);
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state->dom_index += 1;
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state->tried_dclookup = false;
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if (state->dom_index == state->idmap_doms.count) {
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tevent_req_done(req);
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return;
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}
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child = idmap_child();
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state->dom_ids = wb_sids2xids_extract_for_domain_index(
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state, &state->ids, state->dom_index);
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if (tevent_req_nomem(state->dom_ids, req)) {
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return;
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}
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state->idmap_dom = (struct lsa_RefDomainList) {
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.count = 1,
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.domains = &state->idmap_doms.domains[state->dom_index],
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.max_size = 1
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};
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subreq = dcerpc_wbint_Sids2UnixIDs_send(
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state, state->ev, child->binding_handle, &state->idmap_dom,
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state->dom_ids);
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if (tevent_req_nomem(subreq, req)) {
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return;
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}
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tevent_req_set_callback(subreq, wb_sids2xids_done, req);
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}
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static void wb_sids2xids_gotdc(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_sids2xids_state *state = tevent_req_data(
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req, struct wb_sids2xids_state);
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struct winbindd_child *child = idmap_child();
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struct netr_DsRGetDCNameInfo *dcinfo;
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NTSTATUS status;
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status = wb_dsgetdcname_recv(subreq, state, &dcinfo);
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TALLOC_FREE(subreq);
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if (tevent_req_nterror(req, status)) {
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return;
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}
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state->tried_dclookup = true;
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{
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struct lsa_DomainInfo *d =
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&state->idmap_doms.domains[state->dom_index];
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const char *dom_name = d->name.string;
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status = wb_dsgetdcname_gencache_set(dom_name, dcinfo);
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if (tevent_req_nterror(req, status)) {
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return;
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}
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}
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subreq = dcerpc_wbint_Sids2UnixIDs_send(
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state, state->ev, child->binding_handle, &state->idmap_dom,
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state->dom_ids);
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if (tevent_req_nomem(subreq, req)) {
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return;
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}
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tevent_req_set_callback(subreq, wb_sids2xids_done, req);
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}
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NTSTATUS wb_sids2xids_recv(struct tevent_req *req,
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struct unixid xids[], uint32_t num_xids)
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{
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struct wb_sids2xids_state *state = tevent_req_data(
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req, struct wb_sids2xids_state);
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NTSTATUS status;
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uint32_t i, num_non_cached;
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if (tevent_req_is_nterror(req, &status)) {
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DEBUG(5, ("wb_sids_to_xids failed: %s\n", nt_errstr(status)));
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return status;
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}
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if (num_xids != state->num_sids) {
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DEBUG(1, ("%s: Have %u xids, caller wants %u\n", __func__,
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(unsigned)state->num_sids, num_xids));
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return NT_STATUS_INTERNAL_ERROR;
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}
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num_non_cached = 0;
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for (i=0; i<state->num_sids; i++) {
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struct unixid xid;
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xid.id = UINT32_MAX;
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if (state->cached[i].sid != NULL) {
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xid = state->cached[i].xid;
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} else {
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xid = state->ids.ids[num_non_cached].xid;
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idmap_cache_set_sid2unixid(
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&state->non_cached[num_non_cached],
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&xid);
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num_non_cached += 1;
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}
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xids[i] = xid;
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}
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return NT_STATUS_OK;
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}
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static struct wbint_TransIDArray *wb_sids2xids_extract_for_domain_index(
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TALLOC_CTX *mem_ctx, const struct wbint_TransIDArray *src,
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uint32_t domain_index)
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{
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struct wbint_TransIDArray *ret;
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uint32_t i;
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ret = talloc_zero(mem_ctx, struct wbint_TransIDArray);
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if (ret == NULL) {
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return NULL;
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}
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ret->ids = talloc_array(ret, struct wbint_TransID, src->num_ids);
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if (ret->ids == NULL) {
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TALLOC_FREE(ret);
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return NULL;
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}
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for (i=0; i<src->num_ids; i++) {
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if (src->ids[i].domain_index == domain_index) {
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ret->ids[ret->num_ids] = src->ids[i];
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ret->ids[ret->num_ids].domain_index = 0;
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ret->num_ids += 1;
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}
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}
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return ret;
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}
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