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