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/cli_wbint.h"
  23 #include "idmap_cache.h"
  24 #include "idmap.h"
  25
  26 struct wb_gid2sid_state {
  27         struct tevent_context *ev;
  28         char *dom_name;
  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_domain *domain;
  41         struct winbindd_child *child;
  42         bool expired;
  43
  44         req = tevent_req_create(mem_ctx, &state, struct wb_gid2sid_state);
  45         if (req == NULL) {
  46                 return NULL;
  47         }
  48
  49         if (winbindd_use_idmap_cache()
  50             && idmap_cache_find_gid2sid(gid, &state->sid, &expired)) {
  51
  52                 DEBUG(10, ("idmap_cache_find_gid2sid found %d%s\n",
  53                            (int)gid, expired ? " (expired)": ""));
  54
  55                 if (!expired || idmap_is_offline()) {
  56                         if (is_null_sid(&state->sid)) {
  57                                 tevent_req_nterror(req,
  58                                                    NT_STATUS_NONE_MAPPED);
  59                         } else {
  60                                 tevent_req_done(req);
  61                         }
  62                         return tevent_req_post(req, ev);
  63                 }
  64         }
  65
  66         state->dom_name = NULL;
  67
  68         for (domain = domain_list(); domain != NULL; domain = domain->next) {
  69                 if (domain->have_idmap_config
  70                     && (gid >= domain->id_range_low)
  71                     && (gid <= domain->id_range_high)) {
  72                         state->dom_name = domain->name;
  73                         break;
  74                 }
  75         }
  76
  77         child = idmap_child();
  78
  79         subreq = dcerpc_wbint_Gid2Sid_send(
  80                 state, ev, child->binding_handle, state->dom_name,
  81                 gid, &state->sid);
  82         if (tevent_req_nomem(subreq, req)) {
  83                 return tevent_req_post(req, ev);
  84         }
  85         tevent_req_set_callback(subreq, wb_gid2sid_done, req);
  86         return req;
  87 }
  88
  89 static void wb_gid2sid_done(struct tevent_req *subreq)
  90 {
  91         struct tevent_req *req = tevent_req_callback_data(
  92                 subreq, struct tevent_req);
  93         struct wb_gid2sid_state *state = tevent_req_data(
  94                 req, struct wb_gid2sid_state);
  95         NTSTATUS status, result;
  96
  97         status = dcerpc_wbint_Gid2Sid_recv(subreq, state, &result);
  98         TALLOC_FREE(subreq);
  99         if (!NT_STATUS_IS_OK(status)) {
 100                 tevent_req_nterror(req, status);
 101                 return;
 102         }
 103         if (!NT_STATUS_IS_OK(result)) {
 104                 tevent_req_nterror(req, result);
 105                 return;
 106         }
 107         tevent_req_done(req);
 108 }
 109
 110 NTSTATUS wb_gid2sid_recv(struct tevent_req *req, struct dom_sid *sid)
 111 {
 112         struct wb_gid2sid_state *state = tevent_req_data(
 113                 req, struct wb_gid2sid_state);
 114         NTSTATUS status;
 115
 116         if (tevent_req_is_nterror(req, &status)) {
 117                 return status;
 118         }
 119         sid_copy(sid, &state->sid);
 120         return NT_STATUS_OK;
 121 }