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 "libcli/security/dom_sid.h"
  24 #include "passdb/machine_sid.h"
  25
  26 struct wb_next_pwent_state {
  27         struct tevent_context *ev;
  28         struct getpwent_state *gstate;
  29         struct dom_sid next_sid;
  30         struct winbindd_pw *pw;
  31 };
  32
  33 static void wb_next_pwent_fetch_done(struct tevent_req *subreq);
  34 static void wb_next_pwent_fill_done(struct tevent_req *subreq);
  35
  36 static void wb_next_pwent_send_do(struct tevent_req *req,
  37                                   struct wb_next_pwent_state *state)
  38 {
  39         struct tevent_req *subreq;
  40         struct dom_sid_buf buf, buf1;
  41
  42         if (state->gstate->next_user >= state->gstate->rids.num_rids) {
  43                 TALLOC_FREE(state->gstate->rids.rids);
  44                 state->gstate->rids.num_rids = 0;
  45
  46                 state->gstate->domain = wb_next_domain(state->gstate->domain);
  47                 if (state->gstate->domain == NULL) {
  48                         tevent_req_nterror(req, NT_STATUS_NO_MORE_ENTRIES);
  49                         return;
  50                 }
  51
  52                 D_DEBUG("Query user RID list for domain %s.\n",
  53                         state->gstate->domain->name);
  54                 subreq = dcerpc_wbint_QueryUserRidList_send(
  55                         state, state->ev,
  56                         dom_child_handle(state->gstate->domain),
  57                         &state->gstate->rids);
  58                 if (tevent_req_nomem(subreq, req)) {
  59                         return;
  60                 }
  61
  62                 tevent_req_set_callback(subreq, wb_next_pwent_fetch_done, req);
  63                 return;
  64         }
  65
  66         sid_compose(&state->next_sid, &state->gstate->domain->sid,
  67                     state->gstate->rids.rids[state->gstate->next_user]);
  68
  69         D_DEBUG("Get pw for SID %s composed from domain SID %s and RID %"PRIu32".\n",
  70                 dom_sid_str_buf(&state->next_sid, &buf),
  71                 dom_sid_str_buf(&state->gstate->domain->sid, &buf1),
  72                 state->gstate->rids.rids[state->gstate->next_user]);
  73         subreq = wb_getpwsid_send(state, state->ev, &state->next_sid,
  74                                   state->pw);
  75         if (tevent_req_nomem(subreq, req)) {
  76                 return;
  77         }
  78
  79         tevent_req_set_callback(subreq, wb_next_pwent_fill_done, req);
  80 }
  81
  82 struct tevent_req *wb_next_pwent_send(TALLOC_CTX *mem_ctx,
  83                                       struct tevent_context *ev,
  84                                       struct getpwent_state *gstate,
  85                                       struct winbindd_pw *pw)
  86 {
  87         struct tevent_req *req;
  88         struct wb_next_pwent_state *state;
  89
  90         req = tevent_req_create(mem_ctx, &state, struct wb_next_pwent_state);
  91         if (req == NULL) {
  92                 return NULL;
  93         }
  94         D_INFO("WB command next_pwent start.\n");
  95         state->ev = ev;
  96         state->gstate = gstate;
  97         state->pw = pw;
  98
  99         wb_next_pwent_send_do(req, state);
 100         if (!tevent_req_is_in_progress(req)) {
 101                 return tevent_req_post(req, ev);
 102         }
 103
 104         return req;
 105 }
 106
 107 static void wb_next_pwent_fetch_done(struct tevent_req *subreq)
 108 {
 109         struct tevent_req *req = tevent_req_callback_data(
 110                 subreq, struct tevent_req);
 111         struct wb_next_pwent_state *state = tevent_req_data(
 112                 req, struct wb_next_pwent_state);
 113         NTSTATUS status, result;
 114
 115         status = dcerpc_wbint_QueryUserRidList_recv(subreq, state->gstate,
 116                                                     &result);
 117         TALLOC_FREE(subreq);
 118         if (any_nt_status_not_ok(status, result, &status)) {
 119                 /* Ignore errors here, just log it */
 120                 D_DEBUG("query_user_list for domain %s returned %s\n",
 121                            state->gstate->domain->name,
 122                            nt_errstr(status));
 123                 state->gstate->rids.num_rids = 0;
 124         }
 125
 126         state->gstate->next_user = 0;
 127
 128         wb_next_pwent_send_do(req, state);
 129 }
 130
 131 static void wb_next_pwent_fill_done(struct tevent_req *subreq)
 132 {
 133         struct tevent_req *req = tevent_req_callback_data(
 134                 subreq, struct tevent_req);
 135         struct wb_next_pwent_state *state = tevent_req_data(
 136                 req, struct wb_next_pwent_state);
 137         NTSTATUS status;
 138
 139         status = wb_getpwsid_recv(subreq);
 140         TALLOC_FREE(subreq);
 141         /*
 142          * When you try to enumerate users with 'getent passwd' and the user
 143          * doesn't have a uid set we should just move on.
 144          */
 145         if (NT_STATUS_EQUAL(status, NT_STATUS_NO_SUCH_USER)) {
 146                 state->gstate->next_user += 1;
 147
 148                 wb_next_pwent_send_do(req, state);
 149
 150                 return;
 151         } else if (tevent_req_nterror(req, status)) {
 152                 return;
 153         }
 154         state->gstate->next_user += 1;
 155         tevent_req_done(req);
 156 }
 157
 158 NTSTATUS wb_next_pwent_recv(struct tevent_req *req)
 159 {
 160         D_INFO("WB command next_pwent end.\n");
 161         return tevent_req_simple_recv_ntstatus(req);
 162 }