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/*
ctdb over TCP
Copyright (C) Andrew Tridgell 2006
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 "system/filesys.h"
#include "lib/util/dlinklist.h"
#include "lib/util/debug.h"
#include "ctdb_private.h"
#include "common/common.h"
#include "common/logging.h"
#include "ctdb_tcp.h"
/*
called when a complete packet has come in
*/
void ctdb_tcp_read_cb(uint8_t *data, size_t cnt, void *args)
{
struct ctdb_node *node = talloc_get_type_abort(args, struct ctdb_node);
struct ctdb_tcp_node *tnode = talloc_get_type_abort(
node->transport_data, struct ctdb_tcp_node);
struct ctdb_req_header *hdr = (struct ctdb_req_header *)data;
if (data == NULL) {
/* incoming socket has died */
goto failed;
}
if (cnt < sizeof(*hdr)) {
DEBUG(DEBUG_ALERT,(__location__ " Bad packet length %u\n", (unsigned)cnt));
goto failed;
}
if (cnt & (CTDB_TCP_ALIGNMENT-1)) {
DEBUG(DEBUG_ALERT,(__location__ " Length 0x%x not multiple of alignment\n",
(unsigned)cnt));
goto failed;
}
if (hdr->ctdb_magic != CTDB_MAGIC) {
DEBUG(DEBUG_ALERT,(__location__ " Non CTDB packet 0x%x rejected\n",
hdr->ctdb_magic));
goto failed;
}
if (hdr->ctdb_version != CTDB_PROTOCOL) {
DEBUG(DEBUG_ALERT, (__location__ " Bad CTDB version 0x%x rejected\n",
hdr->ctdb_version));
goto failed;
}
/* tell the ctdb layer above that we have a packet */
tnode->ctdb->upcalls->recv_pkt(tnode->ctdb, data, cnt);
return;
failed:
node->ctdb->upcalls->node_dead(node);
TALLOC_FREE(data);
}
/*
queue a packet for sending
*/
int ctdb_tcp_queue_pkt(struct ctdb_node *node, uint8_t *data, uint32_t length)
{
struct ctdb_tcp_node *tnode = talloc_get_type(node->transport_data,
struct ctdb_tcp_node);
if (tnode->out_queue == NULL) {
DBG_DEBUG("No outgoing connection, dropping packet\n");
return 0;
}
return ctdb_queue_send(tnode->out_queue, data, length);
}
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