source3/winbindd/winbindd_getgrgid.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    async implementation of WINBINDD_GETGRGID
   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 "libcli/security/dom_sid.h"
  23
  24 struct winbindd_getgrgid_state {
  25         struct tevent_context *ev;
  26         struct unixid xid;
  27         struct dom_sid *sid;
  28         const char *domname;
  29         const char *name;
  30         gid_t gid;
  31         struct db_context *members;
  32 };
  33
  34 static void winbindd_getgrgid_gid2sid_done(struct tevent_req *subreq);
  35 static void winbindd_getgrgid_done(struct tevent_req *subreq);
  36
  37 struct tevent_req *winbindd_getgrgid_send(TALLOC_CTX *mem_ctx,
  38                                           struct tevent_context *ev,
  39                                           struct winbindd_cli_state *cli,
  40                                           struct winbindd_request *request)
  41 {
  42         struct tevent_req *req, *subreq;
  43         struct winbindd_getgrgid_state *state;
  44
  45         req = tevent_req_create(mem_ctx, &state,
  46                                 struct winbindd_getgrgid_state);
  47         if (req == NULL) {
  48                 return NULL;
  49         }
  50         state->ev = ev;
  51
  52         DBG_NOTICE("[%s (%u)] getgrgid %d\n",
  53                    cli->client_name,
  54                    (unsigned int)cli->pid,
  55                    (int)request->data.gid);
  56
  57         state->xid = (struct unixid) {
  58                 .id = request->data.uid, .type = ID_TYPE_GID };
  59
  60         subreq = wb_xids2sids_send(state, ev, &state->xid, 1);
  61         if (tevent_req_nomem(subreq, req)) {
  62                 return tevent_req_post(req, ev);
  63         }
  64         tevent_req_set_callback(subreq, winbindd_getgrgid_gid2sid_done,
  65                                 req);
  66         return req;
  67 }
  68
  69 static void winbindd_getgrgid_gid2sid_done(struct tevent_req *subreq)
  70 {
  71         struct tevent_req *req = tevent_req_callback_data(
  72                 subreq, struct tevent_req);
  73         struct winbindd_getgrgid_state *state = tevent_req_data(
  74                 req, struct winbindd_getgrgid_state);
  75         NTSTATUS status;
  76
  77         status = wb_xids2sids_recv(subreq, state, &state->sid);
  78         TALLOC_FREE(subreq);
  79         if (tevent_req_nterror(req, status)) {
  80                 return;
  81         }
  82         if (is_null_sid(state->sid)) {
  83                 tevent_req_nterror(req, NT_STATUS_NO_SUCH_GROUP);
  84                 return;
  85         }
  86
  87         subreq = wb_getgrsid_send(state, state->ev, state->sid,
  88                                   lp_winbind_expand_groups());
  89         if (tevent_req_nomem(subreq, req)) {
  90                 return;
  91         }
  92         tevent_req_set_callback(subreq, winbindd_getgrgid_done, req);
  93 }
  94
  95 static void winbindd_getgrgid_done(struct tevent_req *subreq)
  96 {
  97         struct tevent_req *req = tevent_req_callback_data(
  98                 subreq, struct tevent_req);
  99         struct winbindd_getgrgid_state *state = tevent_req_data(
 100                 req, struct winbindd_getgrgid_state);
 101         NTSTATUS status;
 102
 103         status = wb_getgrsid_recv(subreq, state, &state->domname, &state->name,
 104                                   &state->gid, &state->members);
 105         TALLOC_FREE(subreq);
 106         if (tevent_req_nterror(req, status)) {
 107                 return;
 108         }
 109         tevent_req_done(req);
 110 }
 111
 112 NTSTATUS winbindd_getgrgid_recv(struct tevent_req *req,
 113                                 struct winbindd_response *response)
 114 {
 115         struct winbindd_getgrgid_state *state = tevent_req_data(
 116                 req, struct winbindd_getgrgid_state);
 117         NTSTATUS status;
 118         int num_members;
 119         char *buf;
 120
 121         if (tevent_req_is_nterror(req, &status)) {
 122                 struct dom_sid_buf sidbuf;
 123                 DEBUG(5, ("Could not convert sid %s: %s\n",
 124                           dom_sid_str_buf(state->sid, &sidbuf),
 125                           nt_errstr(status)));
 126                 return status;
 127         }
 128
 129         if (!fill_grent(talloc_tos(), &response->data.gr, state->domname,
 130                         state->name, state->gid)) {
 131                 DEBUG(5, ("fill_grent failed\n"));
 132                 return NT_STATUS_NO_MEMORY;
 133         }
 134
 135         status = winbindd_print_groupmembers(state->members, response,
 136                                              &num_members, &buf);
 137         if (!NT_STATUS_IS_OK(status)) {
 138                 return status;
 139         }
 140
 141         response->data.gr.num_gr_mem = (uint32_t)num_members;
 142
 143         /* Group membership lives at start of extra data */
 144
 145         response->data.gr.gr_mem_ofs = 0;
 146         response->extra_data.data = buf;
 147         response->length += talloc_get_size(response->extra_data.data);
 148
 149         return NT_STATUS_OK;
 150 }