source3/winbindd/wb_next_pwent.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    async next_pwent
   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/cli_wbint.h"
  23
  24 struct wb_next_pwent_state {
  25         struct tevent_context *ev;
  26         struct getpwent_state *gstate;
  27         struct winbindd_pw *pw;
  28 };
  29
  30 static void wb_next_pwent_fetch_done(struct tevent_req *subreq);
  31 static void wb_next_pwent_fill_done(struct tevent_req *subreq);
  32
  33 static struct winbindd_domain *wb_next_find_domain(struct winbindd_domain *domain)
  34 {
  35         if (domain == NULL) {
  36                 domain = domain_list();
  37         } else {
  38                 domain = domain->next;
  39         }
  40
  41         if ((domain != NULL)
  42             && sid_check_is_domain(&domain->sid)) {
  43                 domain = domain->next;
  44         }
  45
  46         if (domain == NULL) {
  47                 return NULL;
  48         }
  49
  50         return domain;
  51 }
  52
  53 struct tevent_req *wb_next_pwent_send(TALLOC_CTX *mem_ctx,
  54                                       struct tevent_context *ev,
  55                                       struct getpwent_state *gstate,
  56                                       struct winbindd_pw *pw)
  57 {
  58         struct tevent_req *req, *subreq;
  59         struct wb_next_pwent_state *state;
  60
  61         req = tevent_req_create(mem_ctx, &state, struct wb_next_pwent_state);
  62         if (req == NULL) {
  63                 return NULL;
  64         }
  65         state->ev = ev;
  66         state->gstate = gstate;
  67         state->pw = pw;
  68
  69         if (state->gstate->next_user >= state->gstate->num_users) {
  70                 TALLOC_FREE(state->gstate->users);
  71
  72                 state->gstate->domain = wb_next_find_domain(state->gstate->domain);
  73                 if (state->gstate->domain == NULL) {
  74                         tevent_req_nterror(req, NT_STATUS_NO_MORE_ENTRIES);
  75                         return tevent_req_post(req, ev);
  76                 }
  77                 subreq = wb_query_user_list_send(state, state->ev,
  78                                                  state->gstate->domain);
  79                 if (tevent_req_nomem(subreq, req)) {
  80                         return tevent_req_post(req, ev);
  81                 }
  82                 tevent_req_set_callback(subreq, wb_next_pwent_fetch_done, req);
  83                 return req;
  84         }
  85
  86         subreq = wb_fill_pwent_send(
  87                 state, state->ev,
  88                 &state->gstate->users[state->gstate->next_user],
  89                 state->pw);
  90         if (tevent_req_nomem(subreq, req)) {
  91                 return tevent_req_post(req, ev);
  92         }
  93         tevent_req_set_callback(subreq, wb_next_pwent_fill_done, req);
  94         return req;
  95 }
  96
  97 static void wb_next_pwent_fetch_done(struct tevent_req *subreq)
  98 {
  99         struct tevent_req *req = tevent_req_callback_data(
 100                 subreq, struct tevent_req);
 101         struct wb_next_pwent_state *state = tevent_req_data(
 102                 req, struct wb_next_pwent_state);
 103         NTSTATUS status;
 104
 105         status = wb_query_user_list_recv(subreq, state->gstate,
 106                                          &state->gstate->num_users,
 107                                          &state->gstate->users);
 108         TALLOC_FREE(subreq);
 109         if (!NT_STATUS_IS_OK(status)) {
 110                 /* Ignore errors here, just log it */
 111                 DEBUG(10, ("query_user_list for domain %s returned %s\n",
 112                            state->gstate->domain->name,
 113                            nt_errstr(status)));
 114                 state->gstate->num_users = 0;
 115         }
 116
 117         if (state->gstate->num_users == 0) {
 118                 state->gstate->domain = state->gstate->domain->next;
 119
 120                 if ((state->gstate->domain != NULL)
 121                     && sid_check_is_domain(&state->gstate->domain->sid)) {
 122                         state->gstate->domain = state->gstate->domain->next;
 123                 }
 124
 125                 if (state->gstate->domain == NULL) {
 126                         tevent_req_nterror(req, NT_STATUS_NO_MORE_ENTRIES);
 127                         return;
 128                 }
 129                 subreq = wb_query_user_list_send(state, state->ev,
 130                                                  state->gstate->domain);
 131                 if (tevent_req_nomem(subreq, req)) {
 132                         return;
 133                 }
 134                 tevent_req_set_callback(subreq, wb_next_pwent_fetch_done, req);
 135                 return;
 136         }
 137
 138         state->gstate->next_user = 0;
 139
 140         subreq = wb_fill_pwent_send(
 141                 state, state->ev,
 142                 &state->gstate->users[state->gstate->next_user],
 143                 state->pw);
 144         if (tevent_req_nomem(subreq, req)) {
 145                 return;
 146         }
 147         tevent_req_set_callback(subreq, wb_next_pwent_fill_done, req);
 148 }
 149
 150 static void wb_next_pwent_fill_done(struct tevent_req *subreq)
 151 {
 152         struct tevent_req *req = tevent_req_callback_data(
 153                 subreq, struct tevent_req);
 154         struct wb_next_pwent_state *state = tevent_req_data(
 155                 req, struct wb_next_pwent_state);
 156         NTSTATUS status;
 157
 158         status = wb_fill_pwent_recv(subreq);
 159         TALLOC_FREE(subreq);
 160         /*
 161          * When you try to enumerate users with 'getent passwd' and the user
 162          * doesn't have a uid set we should just move on.
 163          */
 164         if (NT_STATUS_EQUAL(status, NT_STATUS_NONE_MAPPED)) {
 165                 state->gstate->next_user += 1;
 166
 167                 if (state->gstate->next_user >= state->gstate->num_users) {
 168                         TALLOC_FREE(state->gstate->users);
 169
 170                         state->gstate->domain = wb_next_find_domain(state->gstate->domain);
 171                         if (state->gstate->domain == NULL) {
 172                                 tevent_req_nterror(req, NT_STATUS_NO_MORE_ENTRIES);
 173                                 return;
 174                         }
 175
 176                         subreq = wb_query_user_list_send(state, state->ev,
 177                                         state->gstate->domain);
 178                         if (tevent_req_nomem(subreq, req)) {
 179                                 return;
 180                         }
 181                         tevent_req_set_callback(subreq, wb_next_pwent_fetch_done, req);
 182                         return;
 183                 }
 184
 185                 subreq = wb_fill_pwent_send(state,
 186                                             state->ev,
 187                                             &state->gstate->users[state->gstate->next_user],
 188                                             state->pw);
 189                 if (tevent_req_nomem(subreq, req)) {
 190                         return;
 191                 }
 192                 tevent_req_set_callback(subreq, wb_next_pwent_fill_done, req);
 193
 194                 return;
 195         } else if (!NT_STATUS_IS_OK(status)) {
 196                 tevent_req_nterror(req, status);
 197                 return;
 198         }
 199         state->gstate->next_user += 1;
 200         tevent_req_done(req);
 201 }
 202
 203 NTSTATUS wb_next_pwent_recv(struct tevent_req *req)
 204 {
 205         return tevent_req_simple_recv_ntstatus(req);
 206 }