source3/winbindd/winbindd_list_users.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    async implementation of WINBINDD_LIST_USERS
   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/ndr_winbind_c.h"
  23 #include "lib/util/strv.h"
  24
  25 struct winbindd_list_users_domstate {
  26         struct tevent_req *subreq;
  27         struct winbindd_domain *domain;
  28         char *users;
  29 };
  30
  31 struct winbindd_list_users_state {
  32         size_t num_received;
  33         /* All domains */
  34         size_t num_domains;
  35         struct winbindd_list_users_domstate *domains;
  36 };
  37
  38 static void winbindd_list_users_done(struct tevent_req *subreq);
  39
  40 struct tevent_req *winbindd_list_users_send(TALLOC_CTX *mem_ctx,
  41                                             struct tevent_context *ev,
  42                                             struct winbindd_cli_state *cli,
  43                                             struct winbindd_request *request)
  44 {
  45         struct tevent_req *req;
  46         struct winbindd_list_users_state *state;
  47         struct winbindd_domain *domain;
  48         size_t i;
  49
  50         req = tevent_req_create(mem_ctx, &state,
  51                                 struct winbindd_list_users_state);
  52         if (req == NULL) {
  53                 return NULL;
  54         }
  55         D_NOTICE("[%s (%u)] Winbind external command LIST_USERS start.\n"
  56                  "WBFLAG_FROM_NSS is %s, winbind enum users is %d.\n",
  57                  cli->client_name,
  58                  (unsigned int)cli->pid,
  59                  request->wb_flags & WBFLAG_FROM_NSS ? "Set" : "Unset",
  60                  lp_winbind_enum_users());
  61
  62         if (request->wb_flags & WBFLAG_FROM_NSS && !lp_winbind_enum_users()) {
  63                 tevent_req_done(req);
  64                 return tevent_req_post(req, ev);
  65         }
  66
  67         /* Ensure null termination */
  68         request->domain_name[sizeof(request->domain_name)-1]='\0';
  69
  70         D_NOTICE("Listing users for domain %s\n", request->domain_name);
  71         if (request->domain_name[0] != '\0') {
  72                 state->num_domains = 1;
  73         } else {
  74                 state->num_domains = 0;
  75                 for (domain = domain_list(); domain; domain = domain->next) {
  76                         state->num_domains += 1;
  77                 }
  78         }
  79
  80         state->domains = talloc_array(state,
  81                                       struct winbindd_list_users_domstate,
  82                                       state->num_domains);
  83         if (tevent_req_nomem(state->domains, req)) {
  84                 return tevent_req_post(req, ev);
  85         }
  86
  87         if (request->domain_name[0] != '\0') {
  88                 state->domains[0].domain = find_domain_from_name_noinit(
  89                         request->domain_name);
  90                 if (state->domains[0].domain == NULL) {
  91                         tevent_req_nterror(req, NT_STATUS_NO_SUCH_DOMAIN);
  92                         return tevent_req_post(req, ev);
  93                 }
  94         } else {
  95                 i = 0;
  96                 for (domain = domain_list(); domain; domain = domain->next) {
  97                         state->domains[i++].domain = domain;
  98                 }
  99         }
 100
 101         for (i=0; i<state->num_domains; i++) {
 102                 struct winbindd_list_users_domstate *d = &state->domains[i];
 103                 /*
 104                  * Use "state" as a talloc memory context since it has type
 105                  * "struct tevent_req". This is needed to make tevent call depth
 106                  * tracking working as expected.
 107                  * After calling wb_query_user_list_send(), re-parent back to
 108                  * "state->domains" to make TALLOC_FREE(state->domains) working.
 109                  */
 110                 d->subreq = wb_query_user_list_send(state, ev, d->domain);
 111                 d->subreq = talloc_reparent(state, state->domains, d->subreq);
 112                 if (tevent_req_nomem(d->subreq, req)) {
 113                         TALLOC_FREE(state->domains);
 114                         return tevent_req_post(req, ev);
 115                 }
 116                 tevent_req_set_callback(d->subreq, winbindd_list_users_done,
 117                                         req);
 118         }
 119         state->num_received = 0;
 120         return req;
 121 }
 122
 123 static void winbindd_list_users_done(struct tevent_req *subreq)
 124 {
 125         struct tevent_req *req = tevent_req_callback_data(
 126                 subreq, struct tevent_req);
 127         struct winbindd_list_users_state *state = tevent_req_data(
 128                 req, struct winbindd_list_users_state);
 129         struct winbindd_list_users_domstate *d;
 130         NTSTATUS status;
 131         size_t i;
 132
 133         for (i=0; i<state->num_domains; i++) {
 134                 if (subreq == state->domains[i].subreq) {
 135                         break;
 136                 }
 137         }
 138         if (i == state->num_domains) {
 139                 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
 140                 return;
 141         }
 142
 143         d = &state->domains[i];
 144
 145         status = wb_query_user_list_recv(subreq, state->domains,
 146                                          &d->users);
 147         TALLOC_FREE(subreq);
 148         if (!NT_STATUS_IS_OK(status)) {
 149                 /*
 150                  * Just skip this domain
 151                  */
 152                 d->users = NULL;
 153         }
 154
 155         state->num_received += 1;
 156
 157         if (state->num_received >= state->num_domains) {
 158                 tevent_req_done(req);
 159         }
 160 }
 161
 162 NTSTATUS winbindd_list_users_recv(struct tevent_req *req,
 163                                   struct winbindd_response *response)
 164 {
 165         struct winbindd_list_users_state *state = tevent_req_data(
 166                 req, struct winbindd_list_users_state);
 167         NTSTATUS status;
 168         char *result;
 169         size_t i, len;
 170
 171         D_NOTICE("Winbind external command LIST_USERS end.\n");
 172         if (tevent_req_is_nterror(req, &status)) {
 173                 D_WARNING("Failed with %s.\n", nt_errstr(status));
 174                 return status;
 175         }
 176
 177         result = NULL;
 178
 179         for (i=0; i<state->num_domains; i++) {
 180                 struct winbindd_list_users_domstate *d = &state->domains[i];
 181                 int ret;
 182
 183                 if (d->users == NULL) {
 184                         continue;
 185                 }
 186
 187                 ret = strv_append(state, &result, d->users);
 188                 if (ret != 0) {
 189                         return map_nt_error_from_unix(ret);
 190                 }
 191         }
 192
 193         len = talloc_get_size(result);
 194
 195         response->extra_data.data = talloc_steal(response, result);
 196         response->length += len;
 197         response->data.num_entries = 0;
 198
 199         if (result != NULL && len >= 1) {
 200                 len -= 1;
 201                 response->data.num_entries = 1;
 202
 203                 for (i=0; i<len; i++) {
 204                         if (result[i] == '\0') {
 205                                 result[i] = ',';
 206                                 response->data.num_entries += 1;
 207                         }
 208                 }
 209         }
 210
 211         D_NOTICE("Got %"PRIu32" user(s):\n%s\n",
 212                  response->data.num_entries,
 213                  result);
 214
 215         return NT_STATUS_OK;
 216 }