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 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 = talloc(mem_ctx, struct composite_context);
  54         if (result == NULL) goto failed;
  55         result->state = COMPOSITE_STATE_IN_PROGRESS;
  56         result->async.fn = NULL;
  57         result->event_ctx = service->task->event_ctx;
  58
  59         state = talloc(result, struct get_dom_info_state);
  60         if (state == NULL) goto failed;
  61         state->ctx = result;
  62         result->private_data = state;
  63
  64         state->service = service;
  65
  66         state->info = talloc_zero(state, struct wb_dom_info);
  67         if (state->info == NULL) goto failed;
  68
  69         state->info->name = talloc_strdup(state->info, domain_name);
  70         if (state->info->name == NULL) goto failed;
  71         state->info->sid = dom_sid_dup(state->info, sid);
  72         if (state->info->sid == NULL) goto failed;
  73
  74         make_nbt_name(&name, state->info->name, NBT_NAME_LOGON);
  75
  76         ctx = resolve_name_send(&name, result->event_ctx,
  77                                 lp_name_resolve_order());
  78         if (ctx == NULL) goto failed;
  79
  80         ctx->async.fn = get_dom_info_recv_addrs;
  81         ctx->async.private_data = state;
  82         return result;
  83
  84  failed:
  85         talloc_free(result);
  86         return NULL;
  87 }
  88
  89 static void get_dom_info_recv_addrs(struct composite_context *ctx)
  90 {
  91         struct get_dom_info_state *state =
  92                 talloc_get_type(ctx->async.private_data,
  93                                 struct get_dom_info_state);
  94         struct server_id *nbt_servers;
  95         struct irpc_request *ireq;
  96
  97         state->ctx->status = resolve_name_recv(ctx, state->info,
  98                                                &state->info->dc_address);
  99         if (!composite_is_ok(state->ctx)) return;
 100
 101         nbt_servers = irpc_servers_byname(state->service->task->msg_ctx,
 102                                           "nbt_server");
 103         if ((nbt_servers == NULL) || (nbt_servers[0].id == 0)) {
 104                 composite_error(state->ctx, NT_STATUS_NO_LOGON_SERVERS);
 105                 return;
 106         }
 107
 108         state->r.in.domainname = state->info->name;
 109         state->r.in.ip_address = state->info->dc_address;
 110         state->r.in.my_computername = lp_netbios_name();
 111         state->r.in.my_accountname = talloc_asprintf(state, "%s$",
 112                                                      lp_netbios_name());
 113         if (composite_nomem(state->r.in.my_accountname, state->ctx)) return;
 114         state->r.in.account_control = ACB_WSTRUST;
 115         state->r.in.domain_sid = dom_sid_dup(state, state->info->sid);
 116         if (composite_nomem(state->r.in.domain_sid, state->ctx)) return;
 117
 118         ireq = irpc_call_send(state->service->task->msg_ctx, nbt_servers[0],
 119                               &dcerpc_table_irpc, DCERPC_NBTD_GETDCNAME,
 120                               &state->r, state);
 121         composite_continue_irpc(state->ctx, ireq, get_dom_info_recv_dcname,
 122                                 state);
 123 }
 124
 125 static void get_dom_info_recv_dcname(struct irpc_request *ireq)
 126 {
 127         struct get_dom_info_state *state =
 128                 talloc_get_type(ireq->async.private,
 129                                 struct get_dom_info_state);
 130
 131
 132         state->ctx->status = irpc_call_recv(ireq);
 133         if (!composite_is_ok(state->ctx)) return;
 134
 135         state->info->dc_name = talloc_steal(state->info, state->r.out.dcname);
 136         composite_done(state->ctx);
 137 }
 138
 139 NTSTATUS wb_get_dom_info_recv(struct composite_context *ctx,
 140                               TALLOC_CTX *mem_ctx,
 141                               struct wb_dom_info **result)
 142 {
 143         NTSTATUS status = composite_wait(ctx);
 144         if (NT_STATUS_IS_OK(status)) {
 145                 struct get_dom_info_state *state =
 146                         talloc_get_type(ctx->private_data,
 147                                         struct get_dom_info_state);
 148                 *result = talloc_steal(mem_ctx, state->info);
 149         }
 150         talloc_free(ctx);
 151         return status;
 152 }
 153
 154 NTSTATUS wb_get_dom_info(TALLOC_CTX *mem_ctx,
 155                          struct wbsrv_service *service,
 156                          const char *domain_name,
 157                          const struct dom_sid *sid,
 158                          struct wb_dom_info **result)
 159 {
 160         struct composite_context *ctx =
 161                 wb_get_dom_info_send(mem_ctx, service, domain_name, sid);
 162         return wb_get_dom_info_recv(ctx, mem_ctx, result);
 163 }