text: /* 
     Unix SMB/CIFS implementation.
  
     Command backend for wbinfo --getdcname
  
     Copyright (C) Volker Lendecke 2005
     
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 3 of the License, or
     (at your option) any later version.
     
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
     
     You should have received a copy of the GNU General Public License
     along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
  
  #include "includes.h"
  #include "libcli/composite/composite.h"
  #include "winbind/wb_server.h"
  #include "smbd/service_task.h"
  
  #include "librpc/gen_ndr/ndr_netlogon_c.h"
  
  struct cmd_getdcname_state {
  	struct composite_context *ctx;
  	const char *domain_name;
  
  	struct netr_GetAnyDCName g;
  };
  
  static void getdcname_recv_domain(struct composite_context *ctx);
  static void getdcname_recv_dcname(struct rpc_request *req);
  
  struct composite_context *wb_cmd_getdcname_send(TALLOC_CTX *mem_ctx,
  						struct wbsrv_service *service,
  						const char *domain_name)
  {
  	struct composite_context *result, *ctx;
  	struct cmd_getdcname_state *state;
  
  	result = composite_create(mem_ctx, service->task->event_ctx);
  	if (result == NULL) goto failed;
  
  	state = talloc(result, struct cmd_getdcname_state);
  	if (state == NULL) goto failed;
  	state->ctx = result;
  	result->private_data = state;
  
  	state->domain_name = talloc_strdup(state, domain_name);
  	if (state->domain_name == NULL) goto failed;
  
  	ctx = wb_sid2domain_send(state, service, service->primary_sid);
  	if (ctx == NULL) goto failed;
  
  	ctx->async.fn = getdcname_recv_domain;
  	ctx->async.private_data = state;
  	return result;
  
   failed:
  	talloc_free(result);
  	return NULL;
  }
  
  static void getdcname_recv_domain(struct composite_context *ctx)
  {
  	struct cmd_getdcname_state *state =
  		talloc_get_type(ctx->async.private_data,
  				struct cmd_getdcname_state);
  	struct wbsrv_domain *domain;
  	struct rpc_request *req;
  
  	state->ctx->status = wb_sid2domain_recv(ctx, &domain);
  	if (!composite_is_ok(state->ctx)) return;
  
  	state->g.in.logon_server = talloc_asprintf(
  		state, "\\\\%s",
  		dcerpc_server_name(domain->netlogon_pipe));
  	state->g.in.domainname = state->domain_name;
  	state->g.out.dcname = talloc(state, const char *);
  
  	req = dcerpc_netr_GetAnyDCName_send(domain->netlogon_pipe, state,
  					    &state->g);
  	if (composite_nomem(req, state->ctx)) return;
  
  	composite_continue_rpc(state->ctx, req, getdcname_recv_dcname, state);
  }
  
  static void getdcname_recv_dcname(struct rpc_request *req)
  {
  	struct cmd_getdcname_state *state =
  		talloc_get_type(req->async.private_data,
  				struct cmd_getdcname_state);
  
  	state->ctx->status = dcerpc_ndr_request_recv(req);
  	if (!composite_is_ok(state->ctx)) return;
  	state->ctx->status = werror_to_ntstatus(state->g.out.result);
  	if (!composite_is_ok(state->ctx)) return;
  
  	composite_done(state->ctx);
  }
  
  NTSTATUS wb_cmd_getdcname_recv(struct composite_context *c,
  			       TALLOC_CTX *mem_ctx,
  			       const char **dcname)
  {
  	struct cmd_getdcname_state *state =
  		talloc_get_type(c->private_data, struct cmd_getdcname_state);
  	NTSTATUS status = composite_wait(c);
  	if (NT_STATUS_IS_OK(status)) {
  		const char *p = *(state->g.out.dcname);
  		if (*p == '\\') p += 1;
  		if (*p == '\\') p += 1;
  		*dcname = talloc_strdup(mem_ctx, p);
  		if (*dcname == NULL) {
  			status = NT_STATUS_NO_MEMORY;
  		}
  	}
  	talloc_free(state);
  	return status;
  }
  