ctdb/protocol/protocol_sock.c

   1 /*
   2    CTDB generic sock packet marshalling
   3
   4    Copyright (C) Amitay Isaacs  2017
   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
  25 #include "protocol.h"
  26 #include "protocol_private.h"
  27 #include "protocol_api.h"
  28
  29 size_t sock_packet_header_len(struct sock_packet_header *in)
  30 {
  31         return ctdb_uint32_len(&in->length) +
  32                 ctdb_uint32_len(&in->reqid);
  33 }
  34
  35 void sock_packet_header_push(struct sock_packet_header *in, uint8_t *buf,
  36                              size_t *npush)
  37 {
  38         size_t offset = 0, np;
  39
  40         ctdb_uint32_push(&in->length, buf+offset, &np);
  41         offset += np;
  42
  43         ctdb_uint32_push(&in->reqid, buf+offset, &np);
  44         offset += np;
  45
  46         *npush = offset;
  47 }
  48
  49 int sock_packet_header_pull(uint8_t *buf, size_t buflen,
  50                             struct sock_packet_header *out, size_t *npull)
  51 {
  52         size_t offset = 0, np;
  53         int ret;
  54
  55         ret = ctdb_uint32_pull(buf+offset, buflen-offset, &out->length, &np);
  56         if (ret != 0) {
  57                 return ret;
  58         }
  59         offset += np;
  60
  61         ret = ctdb_uint32_pull(buf+offset, buflen-offset, &out->reqid, &np);
  62         if (ret != 0) {
  63                 return ret;
  64         }
  65         offset += np;
  66
  67         *npull = offset;
  68         return 0;
  69 }
  70
  71 void sock_packet_header_set_reqid(struct sock_packet_header *h,
  72                                   uint32_t reqid)
  73 {
  74         h->reqid = reqid;
  75 }
  76
  77 void sock_packet_header_set_length(struct sock_packet_header *h,
  78                                    uint32_t length)
  79 {
  80         h->length = length;
  81 }