source3/winbindd/wb_gid2sid.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    async gid2sid
   4    Copyright (C) Volker Lendecke 2009
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "includes.h"
  21 #include "winbindd.h"
  22 #include "librpc/gen_ndr/ndr_winbind_c.h"
  23 #include "idmap_cache.h"
  24 #include "idmap.h"
  25 #include "../libcli/security/security.h"
  26
  27 struct wb_gid2sid_state {
  28         struct tevent_context *ev;
  29         struct dom_sid sid;
  30 };
  31
  32 static void wb_gid2sid_done(struct tevent_req *subreq);
  33
  34 struct tevent_req *wb_gid2sid_send(TALLOC_CTX *mem_ctx,
  35                                    struct tevent_context *ev,
  36                                    gid_t gid)
  37 {
  38         struct tevent_req *req, *subreq;
  39         struct wb_gid2sid_state *state;
  40         struct winbindd_child *child;
  41         bool expired;
  42
  43         req = tevent_req_create(mem_ctx, &state, struct wb_gid2sid_state);
  44         if (req == NULL) {
  45                 return NULL;
  46         }
  47
  48         if (winbindd_use_idmap_cache()
  49             && idmap_cache_find_gid2sid(gid, &state->sid, &expired)) {
  50
  51                 DEBUG(10, ("idmap_cache_find_gid2sid found %d%s\n",
  52                            (int)gid, expired ? " (expired)": ""));
  53
  54                 if (!expired || idmap_is_offline()) {
  55                         if (is_null_sid(&state->sid)) {
  56                                 tevent_req_nterror(req,
  57                                                    NT_STATUS_NONE_MAPPED);
  58                         } else {
  59                                 tevent_req_done(req);
  60                         }
  61                         return tevent_req_post(req, ev);
  62                 }
  63         }
  64
  65         child = idmap_child();
  66
  67         subreq = dcerpc_wbint_Gid2Sid_send(
  68                 state, ev, child->binding_handle,
  69                 gid, &state->sid);
  70         if (tevent_req_nomem(subreq, req)) {
  71                 return tevent_req_post(req, ev);
  72         }
  73         tevent_req_set_callback(subreq, wb_gid2sid_done, req);
  74         return req;
  75 }
  76
  77 static void wb_gid2sid_done(struct tevent_req *subreq)
  78 {
  79         struct tevent_req *req = tevent_req_callback_data(
  80                 subreq, struct tevent_req);
  81         struct wb_gid2sid_state *state = tevent_req_data(
  82                 req, struct wb_gid2sid_state);
  83         NTSTATUS status, result;
  84
  85         status = dcerpc_wbint_Gid2Sid_recv(subreq, state, &result);
  86         TALLOC_FREE(subreq);
  87         if (any_nt_status_not_ok(status, result, &status)) {
  88                 tevent_req_nterror(req, status);
  89                 return;
  90         }
  91         tevent_req_done(req);
  92 }
  93
  94 NTSTATUS wb_gid2sid_recv(struct tevent_req *req, struct dom_sid *sid)
  95 {
  96         struct wb_gid2sid_state *state = tevent_req_data(
  97                 req, struct wb_gid2sid_state);
  98         NTSTATUS status;
  99
 100         if (tevent_req_is_nterror(req, &status)) {
 101                 return status;
 102         }
 103         sid_copy(sid, &state->sid);
 104         return NT_STATUS_OK;
 105 }