ctdb/protocol/protocol_keepalive.c

   1 /*
   2    CTDB protocol 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 #include <tdb.h>
  25
  26 #include "protocol.h"
  27 #include "protocol_api.h"
  28 #include "protocol_private.h"
  29
  30 size_t ctdb_req_keepalive_len(struct ctdb_req_header *h,
  31                               struct ctdb_req_keepalive *c)
  32 {
  33         return ctdb_req_header_len(h) +
  34                 ctdb_uint32_len(&c->version) +
  35                 ctdb_uint32_len(&c->uptime);
  36 }
  37
  38 int ctdb_req_keepalive_push(struct ctdb_req_header *h,
  39                             struct ctdb_req_keepalive *c,
  40                             uint8_t *buf, size_t *buflen)
  41 {
  42         size_t length, offset = 0, np;
  43
  44         length = ctdb_req_keepalive_len(h, c);
  45         if (*buflen < length) {
  46                 *buflen = length;
  47                 return EMSGSIZE;
  48         }
  49
  50         h->length = *buflen;
  51         ctdb_req_header_push(h, buf+offset, &np);
  52         offset += np;
  53
  54         ctdb_uint32_push(&c->version, buf+offset, &np);
  55         offset += np;
  56
  57         ctdb_uint32_push(&c->uptime, buf+offset, &np);
  58         offset += np;
  59
  60         return 0;
  61 }
  62
  63 int ctdb_req_keepalive_pull(uint8_t *buf, size_t buflen,
  64                             struct ctdb_req_header *h,
  65                             TALLOC_CTX *mem_ctx,
  66                             struct ctdb_req_keepalive *c)
  67 {
  68         struct ctdb_req_header header;
  69         size_t offset = 0, np;
  70         int ret;
  71
  72         ret = ctdb_req_header_pull(buf, buflen, &header, &np);
  73         if (ret != 0) {
  74                 return ret;
  75         }
  76         offset += np;
  77
  78         if (h != NULL) {
  79                 *h = header;
  80         }
  81
  82         ret = ctdb_uint32_pull(buf+offset, buflen-offset, &c->version, &np);
  83         if (ret != 0) {
  84                 return ret;
  85         }
  86         offset += np;
  87
  88         ret = ctdb_uint32_pull(buf+offset, buflen-offset, &c->uptime, &np);
  89         if (ret != 0) {
  90                 return ret;
  91         }
  92         offset += np;
  93
  94         return 0;
  95 }