source4/winbind/wb_cmd_getdcname.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Command backend for wbinfo --getdcname
   5
   6    Copyright (C) Volker Lendecke 2005
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21 */
  22
  23 #include "includes.h"
  24 #include "libcli/composite/composite.h"
  25 #include "winbind/wb_server.h"
  26 #include "smbd/service_task.h"
  27
  28 #include "librpc/gen_ndr/ndr_netlogon_c.h"
  29
  30 struct cmd_getdcname_state {
  31         struct composite_context *ctx;
  32         const char *domain_name;
  33
  34         struct netr_GetAnyDCName g;
  35 };
  36
  37 static void getdcname_recv_domain(struct composite_context *ctx);
  38 static void getdcname_recv_dcname(struct rpc_request *req);
  39
  40 struct composite_context *wb_cmd_getdcname_send(TALLOC_CTX *mem_ctx,
  41                                                 struct wbsrv_service *service,
  42                                                 const char *domain_name)
  43 {
  44         struct composite_context *result, *ctx;
  45         struct cmd_getdcname_state *state;
  46
  47         result = talloc(mem_ctx, struct composite_context);
  48         if (result == NULL) goto failed;
  49         result->state = COMPOSITE_STATE_IN_PROGRESS;
  50         result->async.fn = NULL;
  51         result->event_ctx = service->task->event_ctx;
  52
  53         state = talloc(result, struct cmd_getdcname_state);
  54         if (state == NULL) goto failed;
  55         state->ctx = result;
  56         result->private_data = state;
  57
  58         state->domain_name = talloc_strdup(state, domain_name);
  59         if (state->domain_name == NULL) goto failed;
  60
  61         ctx = wb_sid2domain_send(state, service, service->primary_sid);
  62         if (ctx == NULL) goto failed;
  63
  64         ctx->async.fn = getdcname_recv_domain;
  65         ctx->async.private_data = state;
  66         return result;
  67
  68  failed:
  69         talloc_free(result);
  70         return NULL;
  71 }
  72
  73 static void getdcname_recv_domain(struct composite_context *ctx)
  74 {
  75         struct cmd_getdcname_state *state =
  76                 talloc_get_type(ctx->async.private_data,
  77                                 struct cmd_getdcname_state);
  78         struct wbsrv_domain *domain;
  79         struct rpc_request *req;
  80
  81         state->ctx->status = wb_sid2domain_recv(ctx, &domain);
  82         if (!composite_is_ok(state->ctx)) return;
  83
  84         state->g.in.logon_server = talloc_asprintf(
  85                 state, "\\\\%s",
  86                 dcerpc_server_name(domain->netlogon_pipe));
  87         state->g.in.domainname = state->domain_name;
  88
  89         req = dcerpc_netr_GetAnyDCName_send(domain->netlogon_pipe, state,
  90                                             &state->g);
  91         if (composite_nomem(req, state->ctx)) return;
  92
  93         composite_continue_rpc(state->ctx, req, getdcname_recv_dcname, state);
  94 }
  95
  96 static void getdcname_recv_dcname(struct rpc_request *req)
  97 {
  98         struct cmd_getdcname_state *state =
  99                 talloc_get_type(req->async.private,
 100                                 struct cmd_getdcname_state);
 101
 102         state->ctx->status = dcerpc_ndr_request_recv(req);
 103         if (!composite_is_ok(state->ctx)) return;
 104         state->ctx->status = werror_to_ntstatus(state->g.out.result);
 105         if (!composite_is_ok(state->ctx)) return;
 106
 107         composite_done(state->ctx);
 108 }
 109
 110 NTSTATUS wb_cmd_getdcname_recv(struct composite_context *c,
 111                                TALLOC_CTX *mem_ctx,
 112                                const char **dcname)
 113 {
 114         struct cmd_getdcname_state *state =
 115                 talloc_get_type(c->private_data, struct cmd_getdcname_state);
 116         NTSTATUS status = composite_wait(c);
 117         if (NT_STATUS_IS_OK(status)) {
 118                 const char *p = state->g.out.dcname;
 119                 if (*p == '\\') p += 1;
 120                 if (*p == '\\') p += 1;
 121                 *dcname = talloc_strdup(mem_ctx, p);
 122                 if (*dcname == NULL) {
 123                         status = NT_STATUS_NO_MEMORY;
 124                 }
 125         }
 126         talloc_free(state);
 127         return status;
 128 }