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                 d->subreq = wb_query_user_list_send(
 105                         state->domains, ev, d->domain);
 106                 if (tevent_req_nomem(d->subreq, req)) {
 107                         TALLOC_FREE(state->domains);
 108                         return tevent_req_post(req, ev);
 109                 }
 110                 tevent_req_set_callback(d->subreq, winbindd_list_users_done,
 111                                         req);
 112         }
 113         state->num_received = 0;
 114         return req;
 115 }
 116
 117 static void winbindd_list_users_done(struct tevent_req *subreq)
 118 {
 119         struct tevent_req *req = tevent_req_callback_data(
 120                 subreq, struct tevent_req);
 121         struct winbindd_list_users_state *state = tevent_req_data(
 122                 req, struct winbindd_list_users_state);
 123         struct winbindd_list_users_domstate *d;
 124         NTSTATUS status;
 125         size_t i;
 126
 127         for (i=0; i<state->num_domains; i++) {
 128                 if (subreq == state->domains[i].subreq) {
 129                         break;
 130                 }
 131         }
 132         if (i == state->num_domains) {
 133                 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
 134                 return;
 135         }
 136
 137         d = &state->domains[i];
 138
 139         status = wb_query_user_list_recv(subreq, state->domains,
 140                                          &d->users);
 141         TALLOC_FREE(subreq);
 142         if (!NT_STATUS_IS_OK(status)) {
 143                 /*
 144                  * Just skip this domain
 145                  */
 146                 d->users = NULL;
 147         }
 148
 149         state->num_received += 1;
 150
 151         if (state->num_received >= state->num_domains) {
 152                 tevent_req_done(req);
 153         }
 154 }
 155
 156 NTSTATUS winbindd_list_users_recv(struct tevent_req *req,
 157                                   struct winbindd_response *response)
 158 {
 159         struct winbindd_list_users_state *state = tevent_req_data(
 160                 req, struct winbindd_list_users_state);
 161         NTSTATUS status;
 162         char *result;
 163         size_t i, len;
 164
 165         D_NOTICE("Winbind external command LIST_USERS end.\n");
 166         if (tevent_req_is_nterror(req, &status)) {
 167                 D_WARNING("Failed with %s.\n", nt_errstr(status));
 168                 return status;
 169         }
 170
 171         result = NULL;
 172
 173         for (i=0; i<state->num_domains; i++) {
 174                 struct winbindd_list_users_domstate *d = &state->domains[i];
 175                 int ret;
 176
 177                 if (d->users == NULL) {
 178                         continue;
 179                 }
 180
 181                 ret = strv_append(state, &result, d->users);
 182                 if (ret != 0) {
 183                         return map_nt_error_from_unix(ret);
 184                 }
 185         }
 186
 187         len = talloc_get_size(result);
 188
 189         response->extra_data.data = talloc_steal(response, result);
 190         response->length += len;
 191         response->data.num_entries = 0;
 192
 193         if (result != NULL && len >= 1) {
 194                 len -= 1;
 195                 response->data.num_entries = 1;
 196
 197                 for (i=0; i<len; i++) {
 198                         if (result[i] == '\0') {
 199                                 result[i] = ',';
 200                                 response->data.num_entries += 1;
 201                         }
 202                 }
 203         }
 204
 205         D_NOTICE("Got %"PRIu32" user(s):\n%s\n",
 206                  response->data.num_entries,
 207                  result);
 208
 209         return NT_STATUS_OK;
 210 }