root/source4/libcli/composite/composite.h

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INCLUDED FROM


   1 /* 
   2    Unix SMB/CIFS implementation.
   3 
   4    composite request interfaces
   5 
   6    Copyright (C) Andrew Tridgell 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 #ifndef __COMPOSITE_H__
  23 #define __COMPOSITE_H__
  24 
  25 #include "libcli/raw/interfaces.h"
  26 
  27 struct tevent_context;
  28 
  29 /*
  30   this defines the structures associated with "composite"
  31   requests. Composite requests are libcli requests that are internally
  32   implemented as multiple async calls, but can be treated as a
  33   single call via these composite calls. The composite calls are
  34   particularly designed to be used in async applications.
  35   you can also stack multiple level of composite call
  36 */
  37 
  38 /*
  39   a composite call moves between the following 3 states.
  40 */
  41 enum composite_state { COMPOSITE_STATE_INIT,         /* we are creating the request */
  42                        COMPOSITE_STATE_IN_PROGRESS,  /* the request is in the outgoing socket Q */
  43                        COMPOSITE_STATE_DONE,         /* the request is received by the caller finished */
  44                        COMPOSITE_STATE_ERROR };      /* a packet or transport level error has occurred */
  45 
  46 /* the context of one "composite" call */
  47 struct composite_context {
  48         /* the external state - will be queried by the caller */
  49         enum composite_state state;
  50 
  51         /* a private pointer for use by the composite function
  52            implementation */
  53         void *private_data;
  54 
  55         /* status code when finished */
  56         NTSTATUS status;
  57 
  58         /* the event context we are using */
  59         struct tevent_context *event_ctx;
  60 
  61         /* information on what to do on completion */
  62         struct {
  63                 void (*fn)(struct composite_context *);
  64                 void *private_data;
  65         } async;
  66 
  67         bool used_wait;
  68 };
  69 
  70 struct irpc_request;
  71 struct smbcli_request;
  72 struct smb2_request;
  73 struct rpc_request;
  74 struct nbt_name_request;
  75 
  76 struct composite_context *composite_create(TALLOC_CTX *mem_ctx, struct tevent_context *ev);
  77 bool composite_nomem(const void *p, struct composite_context *ctx);
  78 void composite_continue(struct composite_context *ctx,
  79                                  struct composite_context *new_ctx,
  80                                  void (*continuation)(struct composite_context *),
  81                                  void *private_data);
  82 void composite_continue_rpc(struct composite_context *ctx,
  83                                      struct rpc_request *new_req,
  84                                      void (*continuation)(struct rpc_request *),
  85                                      void *private_data);
  86 void composite_continue_irpc(struct composite_context *ctx,
  87                                       struct irpc_request *new_req,
  88                                       void (*continuation)(struct irpc_request *),
  89                                       void *private_data);
  90 void composite_continue_smb(struct composite_context *ctx,
  91                                      struct smbcli_request *new_req,
  92                                      void (*continuation)(struct smbcli_request *),
  93                                      void *private_data);
  94 void composite_continue_smb2(struct composite_context *ctx,
  95                                       struct smb2_request *new_req,
  96                                       void (*continuation)(struct smb2_request *),
  97                                       void *private_data);
  98 void composite_continue_nbt(struct composite_context *ctx,
  99                                      struct nbt_name_request *new_req,
 100                                      void (*continuation)(struct nbt_name_request *),
 101                                      void *private_data);
 102 bool composite_is_ok(struct composite_context *ctx);
 103 void composite_done(struct composite_context *ctx);
 104 void composite_error(struct composite_context *ctx, NTSTATUS status);
 105 NTSTATUS composite_wait(struct composite_context *c);
 106 NTSTATUS composite_wait_free(struct composite_context *c);
 107 
 108 
 109 #endif /* __COMPOSITE_H__ */

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