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