source3/winbindd/winbindd_getgrnam.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    async implementation of WINBINDD_GETGRNAM
   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
  23 struct winbindd_getgrnam_state {
  24         struct tevent_context *ev;
  25         fstring name_domain, name_group;
  26         struct dom_sid sid;
  27         const char *domname;
  28         const char *name;
  29         gid_t gid;
  30         struct db_context *members;
  31 };
  32
  33 static void winbindd_getgrnam_lookupname_done(struct tevent_req *subreq);
  34 static void winbindd_getgrnam_done(struct tevent_req *subreq);
  35
  36 struct tevent_req *winbindd_getgrnam_send(TALLOC_CTX *mem_ctx,
  37                                           struct tevent_context *ev,
  38                                           struct winbindd_cli_state *cli,
  39                                           struct winbindd_request *request)
  40 {
  41         struct tevent_req *req, *subreq;
  42         struct winbindd_getgrnam_state *state;
  43         char *tmp;
  44         NTSTATUS nt_status;
  45
  46         req = tevent_req_create(mem_ctx, &state,
  47                                 struct winbindd_getgrnam_state);
  48         if (req == NULL) {
  49                 return NULL;
  50         }
  51         state->ev = ev;
  52
  53         /* Ensure null termination */
  54         request->data.groupname[sizeof(request->data.groupname)-1]='\0';
  55
  56         DEBUG(3, ("getgrnam %s\n", request->data.groupname));
  57
  58         nt_status = normalize_name_unmap(state, request->data.groupname, &tmp);
  59         /* If we didn't map anything in the above call, just reset the
  60            tmp pointer to the original string */
  61         if (!NT_STATUS_IS_OK(nt_status) &&
  62             !NT_STATUS_EQUAL(nt_status, NT_STATUS_FILE_RENAMED))
  63         {
  64                 tmp = request->data.groupname;
  65         }
  66
  67         /* Parse domain and groupname */
  68
  69         parse_domain_user(tmp, state->name_domain, state->name_group);
  70
  71         /* if no domain or our local domain and no local tdb group, default to
  72          * our local domain for aliases */
  73
  74         if ( !*(state->name_domain) || strequal(state->name_domain,
  75                                                 get_global_sam_name()) ) {
  76                 fstrcpy(state->name_domain, get_global_sam_name());
  77         }
  78
  79         subreq = wb_lookupname_send(state, ev,
  80                                     state->name_domain,
  81                                     state->name_domain,
  82                                     state->name_group,
  83                                     0);
  84         if (tevent_req_nomem(subreq, req)) {
  85                 return tevent_req_post(req, ev);
  86         }
  87         tevent_req_set_callback(subreq, winbindd_getgrnam_lookupname_done,
  88                                 req);
  89         return req;
  90 }
  91
  92 static void winbindd_getgrnam_lookupname_done(struct tevent_req *subreq)
  93 {
  94         struct tevent_req *req = tevent_req_callback_data(
  95                 subreq, struct tevent_req);
  96         struct winbindd_getgrnam_state *state = tevent_req_data(
  97                 req, struct winbindd_getgrnam_state);
  98         enum lsa_SidType type;
  99         NTSTATUS status;
 100
 101         status = wb_lookupname_recv(subreq, &state->sid, &type);
 102         TALLOC_FREE(subreq);
 103         if (tevent_req_nterror(req, status)) {
 104                 return;
 105         }
 106
 107         switch (type) {
 108         case SID_NAME_DOM_GRP:
 109         case SID_NAME_ALIAS:
 110         case SID_NAME_WKN_GRP:
 111         /*
 112          * Also give user types a chance:
 113          * These might be user sids mapped to the ID_TYPE_BOTH,
 114          * and in that case we should construct a group struct.
 115          */
 116         case SID_NAME_USER:
 117         case SID_NAME_COMPUTER:
 118                 break;
 119         default:
 120                 tevent_req_nterror(req, NT_STATUS_NO_SUCH_GROUP);
 121                 return;
 122         }
 123
 124         subreq = wb_getgrsid_send(state, state->ev, &state->sid,
 125                                   lp_winbind_expand_groups());
 126         if (tevent_req_nomem(subreq, req)) {
 127                 return;
 128         }
 129         tevent_req_set_callback(subreq, winbindd_getgrnam_done, req);
 130 }
 131
 132 static void winbindd_getgrnam_done(struct tevent_req *subreq)
 133 {
 134         struct tevent_req *req = tevent_req_callback_data(
 135                 subreq, struct tevent_req);
 136         struct winbindd_getgrnam_state *state = tevent_req_data(
 137                 req, struct winbindd_getgrnam_state);
 138         NTSTATUS status;
 139
 140         status = wb_getgrsid_recv(subreq, state, &state->domname, &state->name,
 141                                   &state->gid, &state->members);
 142         TALLOC_FREE(subreq);
 143         if (tevent_req_nterror(req, status)) {
 144                 return;
 145         }
 146         tevent_req_done(req);
 147 }
 148
 149 NTSTATUS winbindd_getgrnam_recv(struct tevent_req *req,
 150                                 struct winbindd_response *response)
 151 {
 152         struct winbindd_getgrnam_state *state = tevent_req_data(
 153                 req, struct winbindd_getgrnam_state);
 154         NTSTATUS status;
 155         int num_members;
 156         char *buf;
 157
 158         if (tevent_req_is_nterror(req, &status)) {
 159                 DEBUG(5, ("Could not convert sid %s: %s\n",
 160                           sid_string_dbg(&state->sid), nt_errstr(status)));
 161                 return status;
 162         }
 163
 164         if (!fill_grent(talloc_tos(), &response->data.gr, state->domname,
 165                         state->name, state->gid)) {
 166                 DEBUG(5, ("fill_grent failed\n"));
 167                 return NT_STATUS_NO_MEMORY;
 168         }
 169
 170         status = winbindd_print_groupmembers(state->members, response,
 171                                              &num_members, &buf);
 172         if (!NT_STATUS_IS_OK(status)) {
 173                 return status;
 174         }
 175
 176         response->data.gr.num_gr_mem = (uint32_t)num_members;
 177
 178         /* Group membership lives at start of extra data */
 179
 180         response->data.gr.gr_mem_ofs = 0;
 181         response->extra_data.data = buf;
 182         response->length += talloc_get_size(response->extra_data.data);
 183
 184         return NT_STATUS_OK;
 185 }