source/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 2 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, write to the Free Software
  21    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22 */
  23
  24 #include "includes.h"
  25 #include "libcli/composite/composite.h"
  26 #include "libcli/resolve/resolve.h"
  27 #include "libcli/security/security.h"
  28 #include "winbind/wb_server.h"
  29 #include "smbd/service_task.h"
  30 #include "librpc/gen_ndr/ndr_irpc.h"
  31 #include "librpc/gen_ndr/samr.h"
  32 #include "lib/messaging/irpc.h"
  33
  34 struct get_dom_info_state {
  35         struct composite_context *ctx;
  36         struct wbsrv_service *service;
  37         struct nbtd_getdcname r;
  38         struct wb_dom_info *info;
  39 };
  40
  41 static void get_dom_info_recv_addrs(struct composite_context *ctx);
  42 static void get_dom_info_recv_dcname(struct irpc_request *ireq);
  43
  44 struct composite_context *wb_get_dom_info_send(TALLOC_CTX *mem_ctx,
  45                                                struct wbsrv_service *service,
  46                                                const char *domain_name,
  47                                                const struct dom_sid *sid)
  48 {
  49         struct composite_context *result, *ctx;
  50         struct get_dom_info_state *state;
  51         struct nbt_name name;
  52
  53         result = composite_create(mem_ctx, service->task->event_ctx);
  54         if (result == NULL) goto failed;
  55
  56         state = talloc(result, struct get_dom_info_state);
  57         if (state == NULL) goto failed;
  58         state->ctx = result;
  59         result->private_data = state;
  60
  61         state->service = service;
  62
  63         state->info = talloc_zero(state, struct wb_dom_info);
  64         if (state->info == NULL) goto failed;
  65
  66         state->info->name = talloc_strdup(state->info, domain_name);
  67         if (state->info->name == NULL) goto failed;
  68         state->info->sid = dom_sid_dup(state->info, sid);
  69         if (state->info->sid == NULL) goto failed;
  70
  71         make_nbt_name(&name, state->info->name, NBT_NAME_LOGON);
  72
  73         ctx = resolve_name_send(&name, result->event_ctx,
  74                                 lp_name_resolve_order());
  75         if (ctx == NULL) goto failed;
  76
  77         ctx->async.fn = get_dom_info_recv_addrs;
  78         ctx->async.private_data = state;
  79         return result;
  80
  81  failed:
  82         talloc_free(result);
  83         return NULL;
  84 }
  85
  86 static void get_dom_info_recv_addrs(struct composite_context *ctx)
  87 {
  88         struct get_dom_info_state *state =
  89                 talloc_get_type(ctx->async.private_data,
  90                                 struct get_dom_info_state);
  91         struct server_id *nbt_servers;
  92         struct irpc_request *ireq;
  93
  94         state->ctx->status = resolve_name_recv(ctx, state->info,
  95                                                &state->info->dc_address);
  96         if (!composite_is_ok(state->ctx)) return;
  97
  98         nbt_servers = irpc_servers_byname(state->service->task->msg_ctx,
  99                                           state, "nbt_server");
 100         if ((nbt_servers == NULL) || (nbt_servers[0].id == 0)) {
 101                 composite_error(state->ctx, NT_STATUS_NO_LOGON_SERVERS);
 102                 return;
 103         }
 104
 105         state->r.in.domainname = state->info->name;
 106         state->r.in.ip_address = state->info->dc_address;
 107         state->r.in.my_computername = lp_netbios_name();
 108         state->r.in.my_accountname = talloc_asprintf(state, "%s$",
 109                                                      lp_netbios_name());
 110         if (composite_nomem(state->r.in.my_accountname, state->ctx)) return;
 111         state->r.in.account_control = ACB_WSTRUST;
 112         state->r.in.domain_sid = dom_sid_dup(state, state->info->sid);
 113         if (composite_nomem(state->r.in.domain_sid, state->ctx)) return;
 114
 115         ireq = irpc_call_send(state->service->task->msg_ctx, nbt_servers[0],
 116                               &dcerpc_table_irpc, DCERPC_NBTD_GETDCNAME,
 117                               &state->r, state);
 118         composite_continue_irpc(state->ctx, ireq, get_dom_info_recv_dcname,
 119                                 state);
 120 }
 121
 122 static void get_dom_info_recv_dcname(struct irpc_request *ireq)
 123 {
 124         struct get_dom_info_state *state =
 125                 talloc_get_type(ireq->async.private,
 126                                 struct get_dom_info_state);
 127
 128
 129         state->ctx->status = irpc_call_recv(ireq);
 130         if (!composite_is_ok(state->ctx)) return;
 131
 132         state->info->dc_name = talloc_steal(state->info, state->r.out.dcname);
 133         composite_done(state->ctx);
 134 }
 135
 136 NTSTATUS wb_get_dom_info_recv(struct composite_context *ctx,
 137                               TALLOC_CTX *mem_ctx,
 138                               struct wb_dom_info **result)
 139 {
 140         NTSTATUS status = composite_wait(ctx);
 141         if (NT_STATUS_IS_OK(status)) {
 142                 struct get_dom_info_state *state =
 143                         talloc_get_type(ctx->private_data,
 144                                         struct get_dom_info_state);
 145                 *result = talloc_steal(mem_ctx, state->info);
 146         }
 147         talloc_free(ctx);
 148         return status;
 149 }
 150
 151 NTSTATUS wb_get_dom_info(TALLOC_CTX *mem_ctx,
 152                          struct wbsrv_service *service,
 153                          const char *domain_name,
 154                          const struct dom_sid *sid,
 155                          struct wb_dom_info **result)
 156 {
 157         struct composite_context *ctx =
 158                 wb_get_dom_info_send(mem_ctx, service, domain_name, sid);
 159         return wb_get_dom_info_recv(ctx, mem_ctx, result);
 160 }