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