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 3 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, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23 #include "libcli/composite/composite.h"
  24 #include "winbind/wb_server.h"
  25 #include "smbd/service_task.h"
  26
  27 #include "librpc/gen_ndr/ndr_netlogon_c.h"
  28
  29 struct cmd_getdcname_state {
  30         struct composite_context *ctx;
  31         const char *domain_name;
  32
  33         struct netr_GetAnyDCName g;
  34 };
  35
  36 static void getdcname_recv_domain(struct composite_context *ctx);
  37 static void getdcname_recv_dcname(struct tevent_req *subreq);
  38
  39 struct composite_context *wb_cmd_getdcname_send(TALLOC_CTX *mem_ctx,
  40                                                 struct wbsrv_service *service,
  41                                                 const char *domain_name)
  42 {
  43         struct composite_context *result, *ctx;
  44         struct cmd_getdcname_state *state;
  45
  46         result = composite_create(mem_ctx, service->task->event_ctx);
  47         if (result == NULL) goto failed;
  48
  49         state = talloc(result, struct cmd_getdcname_state);
  50         if (state == NULL) goto failed;
  51         state->ctx = result;
  52         result->private_data = state;
  53
  54         state->domain_name = talloc_strdup(state, domain_name);
  55         if (state->domain_name == NULL) goto failed;
  56
  57         ctx = wb_sid2domain_send(state, service, service->primary_sid);
  58         if (ctx == NULL) goto failed;
  59
  60         ctx->async.fn = getdcname_recv_domain;
  61         ctx->async.private_data = state;
  62         return result;
  63
  64  failed:
  65         talloc_free(result);
  66         return NULL;
  67 }
  68
  69 static void getdcname_recv_domain(struct composite_context *ctx)
  70 {
  71         struct cmd_getdcname_state *state =
  72                 talloc_get_type(ctx->async.private_data,
  73                                 struct cmd_getdcname_state);
  74         struct wbsrv_domain *domain;
  75         struct tevent_req *subreq;
  76
  77         state->ctx->status = wb_sid2domain_recv(ctx, &domain);
  78         if (!composite_is_ok(state->ctx)) return;
  79
  80         state->g.in.logon_server = talloc_asprintf(
  81                 state, "\\\\%s",
  82                 dcerpc_server_name(domain->netlogon_pipe));
  83         state->g.in.domainname = state->domain_name;
  84         state->g.out.dcname = talloc(state, const char *);
  85
  86         subreq = dcerpc_netr_GetAnyDCName_r_send(state,
  87                                                  state->ctx->event_ctx,
  88                                                  domain->netlogon_pipe->binding_handle,
  89                                                  &state->g);
  90         if (composite_nomem(subreq, state->ctx)) return;
  91
  92         tevent_req_set_callback(subreq, getdcname_recv_dcname, state);
  93 }
  94
  95 static void getdcname_recv_dcname(struct tevent_req *subreq)
  96 {
  97         struct cmd_getdcname_state *state =
  98                 tevent_req_callback_data(subreq,
  99                 struct cmd_getdcname_state);
 100
 101         state->ctx->status = dcerpc_netr_GetAnyDCName_r_recv(subreq, state);
 102         TALLOC_FREE(subreq);
 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_EQUAL(status, NT_STATUS_NO_SUCH_DOMAIN)) {
 118                 /* special case: queried DC is PDC */
 119                 state->g.out.dcname = &state->g.in.logon_server;
 120                 status = NT_STATUS_OK;
 121         }
 122         if (NT_STATUS_IS_OK(status)) {
 123                 const char *p = *(state->g.out.dcname);
 124                 if (*p == '\\') p += 1;
 125                 if (*p == '\\') p += 1;
 126                 *dcname = talloc_strdup(mem_ctx, p);
 127                 if (*dcname == NULL) {
 128                         status = NT_STATUS_NO_MEMORY;
 129                 }
 130         }
 131         talloc_free(state);
 132         return status;
 133 }