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 "winbind/wb_server.h"
  27 #include "smbd/service_task.h"
  28 #include "librpc/gen_ndr/ndr_irpc.h"
  29 #include "librpc/gen_ndr/samr.h"
  30 #include "lib/messaging/irpc.h"
  31
  32 struct get_dom_info_state {
  33         struct composite_context *ctx;
  34         struct wbsrv_service *service;
  35         struct nbtd_getdcname r;
  36         struct wb_dom_info *info;
  37 };
  38
  39 static void get_dom_info_recv_addrs(struct composite_context *ctx);
  40 static void get_dom_info_recv_dcname(struct irpc_request *ireq);
  41
  42 struct composite_context *wb_get_dom_info_send(TALLOC_CTX *mem_ctx,
  43                                                struct wbsrv_service *service,
  44                                                const char *domain_name,
  45                                                const struct dom_sid *sid)
  46 {
  47         struct composite_context *result, *ctx;
  48         struct get_dom_info_state *state;
  49         struct nbt_name name;
  50
  51         result = talloc(mem_ctx, struct composite_context);
  52         if (result == NULL) goto failed;
  53         result->state = COMPOSITE_STATE_IN_PROGRESS;
  54         result->async.fn = NULL;
  55         result->event_ctx = service->task->event_ctx;
  56
  57         state = talloc(result, struct get_dom_info_state);
  58         if (state == NULL) goto failed;
  59         state->ctx = result;
  60         result->private_data = state;
  61
  62         state->service = service;
  63
  64         state->info = talloc_zero(state, struct wb_dom_info);
  65         if (state->info == NULL) goto failed;
  66
  67         state->info->name = talloc_strdup(state->info, domain_name);
  68         if (state->info->name == NULL) goto failed;
  69         state->info->sid = dom_sid_dup(state->info, sid);
  70         if (state->info->sid == NULL) goto failed;
  71
  72         make_nbt_name(&name, state->info->name, NBT_NAME_LOGON);
  73
  74         ctx = resolve_name_send(&name, result->event_ctx,
  75                                 lp_name_resolve_order());
  76         if (ctx == NULL) goto failed;
  77
  78         ctx->async.fn = get_dom_info_recv_addrs;
  79         ctx->async.private_data = state;
  80         return result;
  81
  82  failed:
  83         talloc_free(result);
  84         return NULL;
  85 }
  86
  87 static void get_dom_info_recv_addrs(struct composite_context *ctx)
  88 {
  89         struct get_dom_info_state *state =
  90                 talloc_get_type(ctx->async.private_data,
  91                                 struct get_dom_info_state);
  92         uint32_t *nbt_servers;
  93         struct irpc_request *ireq;
  94
  95         state->ctx->status = resolve_name_recv(ctx, state->info,
  96                                                &state->info->dc_address);
  97         if (!composite_is_ok(state->ctx)) return;
  98
  99         nbt_servers = irpc_servers_byname(state->service->task->msg_ctx,
 100                                           "nbt_server");
 101         if ((nbt_servers == NULL) || (nbt_servers[0] == 0)) {
 102                 composite_error(state->ctx, NT_STATUS_NO_LOGON_SERVERS);
 103                 return;
 104         }
 105
 106         state->r.in.domainname = state->info->name;
 107         state->r.in.ip_address = state->info->dc_address;
 108         state->r.in.my_computername = lp_netbios_name();
 109         state->r.in.my_accountname = talloc_asprintf(state, "%s$",
 110                                                      lp_netbios_name());
 111         if (composite_nomem(state->r.in.my_accountname, state->ctx)) return;
 112         state->r.in.account_control = ACB_WSTRUST;
 113         state->r.in.domain_sid = dom_sid_dup(state, state->info->sid);
 114         if (composite_nomem(state->r.in.domain_sid, state->ctx)) return;
 115
 116         ireq = irpc_call_send(state->service->task->msg_ctx, nbt_servers[0],
 117                               &dcerpc_table_irpc, DCERPC_NBTD_GETDCNAME,
 118                               &state->r, state);
 119         composite_continue_irpc(state->ctx, ireq, get_dom_info_recv_dcname,
 120                                 state);
 121 }
 122
 123 static void get_dom_info_recv_dcname(struct irpc_request *ireq)
 124 {
 125         struct get_dom_info_state *state =
 126                 talloc_get_type(ireq->async.private,
 127                                 struct get_dom_info_state);
 128
 129
 130         state->ctx->status = irpc_call_recv(ireq);
 131         if (!composite_is_ok(state->ctx)) return;
 132
 133         state->info->dc_name = talloc_steal(state->info, state->r.out.dcname);
 134         composite_done(state->ctx);
 135 }
 136
 137 NTSTATUS wb_get_dom_info_recv(struct composite_context *ctx,
 138                               TALLOC_CTX *mem_ctx,
 139                               struct wb_dom_info **result)
 140 {
 141         NTSTATUS status = composite_wait(ctx);
 142         if (NT_STATUS_IS_OK(status)) {
 143                 struct get_dom_info_state *state =
 144                         talloc_get_type(ctx->private_data,
 145                                         struct get_dom_info_state);
 146                 *result = talloc_steal(mem_ctx, state->info);
 147         }
 148         talloc_free(ctx);
 149         return status;
 150 }
 151
 152 NTSTATUS wb_get_dom_info(TALLOC_CTX *mem_ctx,
 153                          struct wbsrv_service *service,
 154                          const char *domain_name,
 155                          const struct dom_sid *sid,
 156                          struct wb_dom_info **result)
 157 {
 158         struct composite_context *ctx =
 159                 wb_get_dom_info_send(mem_ctx, service, domain_name, sid);
 160         return wb_get_dom_info_recv(ctx, mem_ctx, result);
 161 }