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         D_NOTICE("[%s (%u)] Winbind external command GETGRGID start.\n"
  53                  "gid=%u\n",
  54                  cli->client_name,
  55                  (unsigned int)cli->pid,
  56                  (int)request->data.gid);
  57
  58         state->xid = (struct unixid) {
  59                 .id = request->data.uid, .type = ID_TYPE_GID };
  60
  61         subreq = wb_xids2sids_send(state, ev, &state->xid, 1);
  62         if (tevent_req_nomem(subreq, req)) {
  63                 return tevent_req_post(req, ev);
  64         }
  65         tevent_req_set_callback(subreq, winbindd_getgrgid_gid2sid_done,
  66                                 req);
  67         return req;
  68 }
  69
  70 static void winbindd_getgrgid_gid2sid_done(struct tevent_req *subreq)
  71 {
  72         struct tevent_req *req = tevent_req_callback_data(
  73                 subreq, struct tevent_req);
  74         struct winbindd_getgrgid_state *state = tevent_req_data(
  75                 req, struct winbindd_getgrgid_state);
  76         NTSTATUS status;
  77
  78         status = wb_xids2sids_recv(subreq, state, &state->sid);
  79         TALLOC_FREE(subreq);
  80         if (tevent_req_nterror(req, status)) {
  81                 return;
  82         }
  83         if (is_null_sid(state->sid)) {
  84                 tevent_req_nterror(req, NT_STATUS_NO_SUCH_GROUP);
  85                 return;
  86         }
  87
  88         subreq = wb_getgrsid_send(state, state->ev, state->sid,
  89                                   lp_winbind_expand_groups());
  90         if (tevent_req_nomem(subreq, req)) {
  91                 return;
  92         }
  93         tevent_req_set_callback(subreq, winbindd_getgrgid_done, req);
  94 }
  95
  96 static void winbindd_getgrgid_done(struct tevent_req *subreq)
  97 {
  98         struct tevent_req *req = tevent_req_callback_data(
  99                 subreq, struct tevent_req);
 100         struct winbindd_getgrgid_state *state = tevent_req_data(
 101                 req, struct winbindd_getgrgid_state);
 102         NTSTATUS status;
 103
 104         status = wb_getgrsid_recv(subreq, state, &state->domname, &state->name,
 105                                   &state->gid, &state->members);
 106         TALLOC_FREE(subreq);
 107         if (tevent_req_nterror(req, status)) {
 108                 return;
 109         }
 110         tevent_req_done(req);
 111 }
 112
 113 NTSTATUS winbindd_getgrgid_recv(struct tevent_req *req,
 114                                 struct winbindd_response *response)
 115 {
 116         struct winbindd_getgrgid_state *state = tevent_req_data(
 117                 req, struct winbindd_getgrgid_state);
 118         NTSTATUS status;
 119         int num_members;
 120         char *buf;
 121
 122         if (tevent_req_is_nterror(req, &status)) {
 123                 struct dom_sid_buf sidbuf;
 124                 D_WARNING("Could not convert sid %s: %s\n",
 125                           dom_sid_str_buf(state->sid, &sidbuf),
 126                           nt_errstr(status));
 127                 return status;
 128         }
 129
 130         if (!fill_grent(talloc_tos(), &response->data.gr, state->domname,
 131                         state->name, state->gid)) {
 132                 D_WARNING("fill_grent failed\n");
 133                 return NT_STATUS_NO_MEMORY;
 134         }
 135
 136         status = winbindd_print_groupmembers(state->members, response,
 137                                              &num_members, &buf);
 138         if (!NT_STATUS_IS_OK(status)) {
 139                 D_WARNING("Failed with %s.\n", nt_errstr(status));
 140                 return status;
 141         }
 142
 143         response->data.gr.num_gr_mem = (uint32_t)num_members;
 144
 145         /* Group membership lives at start of extra data */
 146
 147         response->data.gr.gr_mem_ofs = 0;
 148         response->extra_data.data = buf;
 149         response->length += talloc_get_size(response->extra_data.data);
 150
 151         D_NOTICE("Winbind external command GETGRGID end.\n"
 152                  "Returning %"PRIu32" group member(s).\n",
 153                  response->data.gr.num_gr_mem);
 154
 155         return NT_STATUS_OK;
 156 }