ctdb/protocol/protocol_packet.c

   1 /*
   2    CTDB protocol marshalling
   3
   4    Copyright (C) Amitay Isaacs  2015
   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 #include "replace.h"
  21 #include "system/network.h"
  22
  23 #include <talloc.h>
  24 #include <tdb.h>
  25
  26 #include "protocol_api.h"
  27
  28 #define CTDB_DS_ALIGNMENT 8
  29
  30 int ctdb_allocate_pkt(TALLOC_CTX *mem_ctx, size_t length,
  31                       uint8_t **buf, size_t *buflen)
  32 {
  33         size_t new_length;
  34
  35         if (buf == NULL || buflen == NULL) {
  36                 return EINVAL;
  37         }
  38
  39         new_length = (length + CTDB_DS_ALIGNMENT-1) & ~(CTDB_DS_ALIGNMENT-1);
  40
  41         *buflen = new_length;
  42         *buf = talloc_zero_size(mem_ctx, new_length);
  43         if (*buf == NULL) {
  44                 return ENOMEM;
  45         }
  46
  47         return 0;
  48 }