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/*
CTDB protocol marshalling
Copyright (C) Amitay Isaacs 2015
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "replace.h"
#include "system/network.h"
#include <talloc.h>
#include <tdb.h>
#include "protocol.h"
#include "protocol_api.h"
#include "protocol_private.h"
int ctdb_req_header_verify(struct ctdb_req_header *h, uint32_t operation)
{
if (h->length < sizeof(struct ctdb_req_header)) {
return EMSGSIZE;
}
if (h->ctdb_magic != CTDB_MAGIC) {
return EPROTO;
}
if (h->ctdb_version != CTDB_PROTOCOL) {
return EPROTO;
}
if (operation != 0 && h->operation != operation) {
return EPROTO;
}
return 0;
}
void ctdb_req_header_fill(struct ctdb_req_header *h, uint32_t generation,
uint32_t operation, uint32_t destnode,
uint32_t srcnode, uint32_t reqid)
{
h->length = sizeof(struct ctdb_req_header);
h->ctdb_magic = CTDB_MAGIC;
h->ctdb_version = CTDB_PROTOCOL;
h->generation = generation;
h->operation = operation;
h->destnode = destnode;
h->srcnode = srcnode;
h->reqid = reqid;
}
size_t ctdb_req_header_len(struct ctdb_req_header *in)
{
return ctdb_uint32_len(&in->length) +
ctdb_uint32_len(&in->ctdb_magic) +
ctdb_uint32_len(&in->ctdb_version) +
ctdb_uint32_len(&in->generation) +
ctdb_uint32_len(&in->operation) +
ctdb_uint32_len(&in->destnode) +
ctdb_uint32_len(&in->srcnode) +
ctdb_uint32_len(&in->reqid);
}
void ctdb_req_header_push(struct ctdb_req_header *in, uint8_t *buf,
size_t *npush)
{
size_t offset = 0, np;
ctdb_uint32_push(&in->length, buf+offset, &np);
offset += np;
ctdb_uint32_push(&in->ctdb_magic, buf+offset, &np);
offset += np;
ctdb_uint32_push(&in->ctdb_version, buf+offset, &np);
offset += np;
ctdb_uint32_push(&in->generation, buf+offset, &np);
offset += np;
ctdb_uint32_push(&in->operation, buf+offset, &np);
offset += np;
ctdb_uint32_push(&in->destnode, buf+offset, &np);
offset += np;
ctdb_uint32_push(&in->srcnode, buf+offset, &np);
offset += np;
ctdb_uint32_push(&in->reqid, buf+offset, &np);
offset += np;
*npush = offset;
}
int ctdb_req_header_pull(uint8_t *buf, size_t buflen,
struct ctdb_req_header *out, size_t *npull)
{
size_t offset = 0, np;
int ret;
ret = ctdb_uint32_pull(buf+offset, buflen-offset, &out->length, &np);
if (ret != 0) {
return ret;
}
offset += np;
ret = ctdb_uint32_pull(buf+offset, buflen-offset, &out->ctdb_magic,
&np);
if (ret != 0) {
return ret;
}
offset += np;
ret = ctdb_uint32_pull(buf+offset, buflen-offset, &out->ctdb_version,
&np);
if (ret != 0) {
return ret;
}
offset += np;
ret = ctdb_uint32_pull(buf+offset, buflen-offset, &out->generation,
&np);
if (ret != 0) {
return ret;
}
offset += np;
ret = ctdb_uint32_pull(buf+offset, buflen-offset, &out->operation,
&np);
if (ret != 0) {
return ret;
}
offset += np;
ret = ctdb_uint32_pull(buf+offset, buflen-offset, &out->destnode, &np);
if (ret != 0) {
return ret;
}
offset += np;
ret = ctdb_uint32_pull(buf+offset, buflen-offset, &out->srcnode, &np);
if (ret != 0) {
return ret;
}
offset += np;
ret = ctdb_uint32_pull(buf+offset, buflen-offset, &out->reqid, &np);
if (ret != 0) {
return ret;
}
offset += np;
*npull = offset;
return 0;
}
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