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