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 talloc_dict *members;
  31 };
  32
  33 static void winbindd_getgrnam_lookupsid_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, state->name_domain, state->name_group,
  80                                     0);
  81         if (tevent_req_nomem(subreq, req)) {
  82                 return tevent_req_post(req, ev);
  83         }
  84         tevent_req_set_callback(subreq, winbindd_getgrnam_lookupsid_done,
  85                                 req);
  86         return req;
  87 }
  88
  89 static void winbindd_getgrnam_lookupsid_done(struct tevent_req *subreq)
  90 {
  91         struct tevent_req *req = tevent_req_callback_data(
  92                 subreq, struct tevent_req);
  93         struct winbindd_getgrnam_state *state = tevent_req_data(
  94                 req, struct winbindd_getgrnam_state);
  95         enum lsa_SidType type;
  96         NTSTATUS status;
  97
  98         status = wb_lookupname_recv(subreq, &state->sid, &type);
  99         TALLOC_FREE(subreq);
 100         if (tevent_req_nterror(req, status)) {
 101                 return;
 102         }
 103
 104         if ( (type != SID_NAME_DOM_GRP) && (type != SID_NAME_ALIAS) ) {
 105                 DEBUG(5,("getgrnam_recv: not a group!\n"));
 106                 tevent_req_nterror(req, NT_STATUS_NO_SUCH_GROUP);
 107                 return;
 108         }
 109
 110         subreq = wb_getgrsid_send(state, state->ev, &state->sid,
 111                                   lp_winbind_expand_groups());
 112         if (tevent_req_nomem(subreq, req)) {
 113                 return;
 114         }
 115         tevent_req_set_callback(subreq, winbindd_getgrnam_done, req);
 116 }
 117
 118 static void winbindd_getgrnam_done(struct tevent_req *subreq)
 119 {
 120         struct tevent_req *req = tevent_req_callback_data(
 121                 subreq, struct tevent_req);
 122         struct winbindd_getgrnam_state *state = tevent_req_data(
 123                 req, struct winbindd_getgrnam_state);
 124         NTSTATUS status;
 125
 126         status = wb_getgrsid_recv(subreq, state, &state->domname, &state->name,
 127                                   &state->gid, &state->members);
 128         TALLOC_FREE(subreq);
 129         if (tevent_req_nterror(req, status)) {
 130                 return;
 131         }
 132         tevent_req_done(req);
 133 }
 134
 135 NTSTATUS winbindd_getgrnam_recv(struct tevent_req *req,
 136                                 struct winbindd_response *response)
 137 {
 138         struct winbindd_getgrnam_state *state = tevent_req_data(
 139                 req, struct winbindd_getgrnam_state);
 140         NTSTATUS status;
 141         int num_members;
 142         char *buf;
 143
 144         if (tevent_req_is_nterror(req, &status)) {
 145                 DEBUG(5, ("Could not convert sid %s: %s\n",
 146                           sid_string_dbg(&state->sid), nt_errstr(status)));
 147                 return status;
 148         }
 149
 150         if (!fill_grent(talloc_tos(), &response->data.gr, state->domname,
 151                         state->name, state->gid)) {
 152                 DEBUG(5, ("fill_grent failed\n"));
 153                 return NT_STATUS_NO_MEMORY;
 154         }
 155
 156         status = winbindd_print_groupmembers(state->members, response,
 157                                              &num_members, &buf);
 158         if (!NT_STATUS_IS_OK(status)) {
 159                 return status;
 160         }
 161
 162         response->data.gr.num_gr_mem = (uint32)num_members;
 163
 164         /* Group membership lives at start of extra data */
 165
 166         response->data.gr.gr_mem_ofs = 0;
 167         response->extra_data.data = buf;
 168         response->length += talloc_get_size(response->extra_data.data);
 169
 170         return NT_STATUS_OK;
 171 }