source3/rpc_server/srv_pipe.c

   1 /*
   2  *  Unix SMB/CIFS implementation.
   3  *  RPC Pipe client / server routines
   4  *  Almost completely rewritten by (C) Jeremy Allison 2005 - 2010
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 3 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 /*  this module apparently provides an implementation of DCE/RPC over a
  21  *  named pipe (IPC$ connection using SMBtrans).  details of DCE/RPC
  22  *  documentation are available (in on-line form) from the X-Open group.
  23  *
  24  *  this module should provide a level of abstraction between SMB
  25  *  and DCE/RPC, while minimising the amount of mallocs, unnecessary
  26  *  data copies, and network traffic.
  27  *
  28  */
  29
  30 #include "includes.h"
  31 #include "rpc_server.h"
  32 #include "rpc_server/srv_pipe.h"
  33
  34 #undef DBGC_CLASS
  35 #define DBGC_CLASS DBGC_RPC_SRV
  36
  37 /**
  38  * Is a named pipe known?
  39  * @param[in] dce_ctx           The rpc server context
  40  * @param[in] pipename          Just the filename
  41  * @param[out] endpoint         The DCERPC endpoint serving the pipe name
  42  * @result                      NT error code
  43  */
  44 NTSTATUS is_known_pipename(struct dcesrv_context *dce_ctx,
  45                            const char *pipename,
  46                            struct dcesrv_endpoint **ep)
  47 {
  48         NTSTATUS status;
  49
  50         if (strchr(pipename, '/')) {
  51                 DBG_WARNING("Refusing open on pipe %s\n", pipename);
  52                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
  53         }
  54
  55         if (lp_disable_spoolss() && strequal(pipename, "spoolss")) {
  56                 DBG_DEBUG("refusing spoolss access\n");
  57                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
  58         }
  59
  60         status = dcesrv_endpoint_by_ncacn_np_name(dce_ctx, pipename, ep);
  61         if (NT_STATUS_IS_OK(status)) {
  62                 return NT_STATUS_OK;
  63         }
  64
  65         status = smb_probe_module("rpc", pipename);
  66         if (!NT_STATUS_IS_OK(status)) {
  67                 DBG_DEBUG("Unknown pipe '%s'\n", pipename);
  68                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
  69         }
  70         DBG_DEBUG("'%s' loaded dynamically\n", pipename);
  71
  72         /*
  73          * Scan the list again for the interface id
  74          */
  75         status = dcesrv_endpoint_by_ncacn_np_name(dce_ctx, pipename, ep);
  76         if (NT_STATUS_IS_OK(status)) {
  77                 return NT_STATUS_OK;
  78         }
  79
  80         DBG_DEBUG("pipe %s did not register itself!\n", pipename);
  81
  82         return NT_STATUS_OBJECT_NAME_NOT_FOUND;
  83 }