source/include/packet.h

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Packet handling
   4    Copyright (C) Volker Lendecke 2007
   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 /*
  21  * A packet context is a wrapper around a bidirectional file descriptor,
  22  * hiding the handling of individual requests.
  23  */
  24
  25 struct packet_context;
  26
  27 /*
  28  * Initialize a packet context. The fd is given to the packet context, meaning
  29  * that it is automatically closed when the packet context is freed.
  30  */
  31 struct packet_context *packet_init(TALLOC_CTX *mem_ctx, int fd);
  32
  33 /*
  34  * Pull data from the fd
  35  */
  36 NTSTATUS packet_fd_read(struct packet_context *ctx);
  37
  38 /*
  39  * Sync read, wait for the next chunk
  40  */
  41 NTSTATUS packet_fd_read_sync(struct packet_context *ctx);
  42
  43 /*
  44  * Handle an incoming packet:
  45  * Return False if none is available
  46  * Otherwise return True and store the callback result in *status
  47  */
  48 bool packet_handler(struct packet_context *ctx,
  49                     bool (*full_req)(const struct data_blob *data,
  50                                      size_t *length,
  51                                      void *private_data),
  52                     NTSTATUS (*callback)(const struct data_blob *data,
  53                                          void *private_data),
  54                     void *private_data,
  55                     NTSTATUS *status);
  56
  57 /*
  58  * How many bytes of outgoing data do we have pending?
  59  */
  60 size_t packet_outgoing_bytes(struct packet_context *ctx);
  61
  62 /*
  63  * Push data to the fd
  64  */
  65 NTSTATUS packet_fd_write(struct packet_context *ctx);
  66
  67 /*
  68  * Sync flush all outgoing bytes
  69  */
  70 NTSTATUS packet_flush(struct packet_context *ctx);
  71
  72 /*
  73  * Send a list of DATA_BLOBs
  74  *
  75  * Example:  packet_send(ctx, 2, data_blob_const(&size, sizeof(size)),
  76  *                       data_blob_const(buf, size));
  77  */
  78 NTSTATUS packet_send(struct packet_context *ctx, int num_blobs, ...);
  79
  80 /*
  81  * Get the packet context's file descriptor
  82  */
  83 int packet_get_fd(struct packet_context *ctx);