source4/winbind/wb_dom_info.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Get a struct wb_dom_info for a domain using DNS, netbios, possibly cldap
   5    etc.
   6
   7    Copyright (C) Volker Lendecke 2005
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21 */
  22
  23 #include "includes.h"
  24 #include "libcli/composite/composite.h"
  25 #include "libcli/resolve/resolve.h"
  26 #include "libcli/security/security.h"
  27 #include "winbind/wb_server.h"
  28 #include "smbd/service_task.h"
  29 #include "libcli/finddc.h"
  30
  31 struct get_dom_info_state {
  32         struct composite_context *ctx;
  33         struct wb_dom_info *info;
  34 };
  35
  36 static void get_dom_info_recv_addrs(struct tevent_req *req);
  37
  38 struct composite_context *wb_get_dom_info_send(TALLOC_CTX *mem_ctx,
  39                                                struct wbsrv_service *service,
  40                                                const char *domain_name,
  41                                                const char *dns_domain_name,
  42                                                const struct dom_sid *sid)
  43 {
  44         struct composite_context *result;
  45         struct tevent_req *req;
  46         struct get_dom_info_state *state;
  47         struct dom_sid *dom_sid;
  48         struct finddcs finddcs_io;
  49
  50         result = composite_create(mem_ctx, service->task->event_ctx);
  51         if (result == NULL) goto failed;
  52
  53         state = talloc(result, struct get_dom_info_state);
  54         if (state == NULL) goto failed;
  55         state->ctx = result;
  56         result->private_data = state;
  57
  58         state->info = talloc_zero(state, struct wb_dom_info);
  59         if (state->info == NULL) goto failed;
  60
  61         state->info->name = talloc_strdup(state->info, domain_name);
  62         if (state->info->name == NULL) goto failed;
  63
  64         state->info->sid = dom_sid_dup(state->info, sid);
  65         if (state->info->sid == NULL) goto failed;
  66
  67         dom_sid = dom_sid_dup(mem_ctx, sid);
  68         if (dom_sid == NULL) goto failed;
  69
  70         ZERO_STRUCT(finddcs_io);
  71         finddcs_io.in.domain_name      = dns_domain_name;
  72         finddcs_io.in.domain_sid       = dom_sid;
  73         finddcs_io.in.minimum_dc_flags = NBT_SERVER_LDAP | NBT_SERVER_DS;
  74         if (service->sec_channel_type == SEC_CHAN_RODC) {
  75                 finddcs_io.in.minimum_dc_flags |= NBT_SERVER_WRITABLE;
  76         }
  77
  78         req = finddcs_cldap_send(mem_ctx, &finddcs_io,
  79                                  lpcfg_resolve_context(service->task->lp_ctx),
  80                                  service->task->event_ctx);
  81         if (req == NULL) goto failed;
  82
  83         tevent_req_set_callback(req, get_dom_info_recv_addrs, state);
  84
  85         return result;
  86
  87  failed:
  88         talloc_free(result);
  89         return NULL;
  90 }
  91
  92 static void get_dom_info_recv_addrs(struct tevent_req *req)
  93 {
  94         struct get_dom_info_state *state = tevent_req_callback_data(req, struct get_dom_info_state);
  95         struct finddcs finddcs_io;
  96
  97         state->info->dc = talloc(state->info, struct nbt_dc_name);
  98
  99         state->ctx->status = finddcs_cldap_recv(req, state->info, &finddcs_io);
 100         if (!composite_is_ok(state->ctx)) return;
 101
 102         if (finddcs_io.out.netlogon.ntver != NETLOGON_NT_VERSION_5EX) {
 103                 /* the finddcs code should have mapped the response to
 104                    the type we want */
 105                 DEBUG(0,(__location__ ": unexpected ntver 0x%08x in finddcs response\n",
 106                          finddcs_io.out.netlogon.ntver));
 107                 state->ctx->status = NT_STATUS_UNEXPECTED_NETWORK_ERROR;
 108                 if (!composite_is_ok(state->ctx)) return;
 109         }
 110
 111         state->info->dc->address = finddcs_io.out.address;
 112         state->info->dc->name    = finddcs_io.out.netlogon.data.nt5_ex.pdc_dns_name;
 113
 114         composite_done(state->ctx);
 115 }
 116
 117 NTSTATUS wb_get_dom_info_recv(struct composite_context *ctx,
 118                               TALLOC_CTX *mem_ctx,
 119                               struct wb_dom_info **result)
 120 {
 121         NTSTATUS status = composite_wait(ctx);
 122         if (NT_STATUS_IS_OK(status)) {
 123                 struct get_dom_info_state *state =
 124                         talloc_get_type(ctx->private_data,
 125                                         struct get_dom_info_state);
 126                 *result = talloc_steal(mem_ctx, state->info);
 127         }
 128         talloc_free(ctx);
 129         return status;
 130 }
 131
 132 NTSTATUS wb_get_dom_info(TALLOC_CTX *mem_ctx,
 133                          struct wbsrv_service *service,
 134                          const char *domain_name,
 135                          const char *dns_domain_name,
 136                          const struct dom_sid *sid,
 137                          struct wb_dom_info **result)
 138 {
 139         struct composite_context *ctx =
 140                 wb_get_dom_info_send(mem_ctx, service, domain_name, dns_domain_name, sid);
 141         return wb_get_dom_info_recv(ctx, mem_ctx, result);
 142 }