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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"
struct ctdb_req_message_wire {
struct ctdb_req_header hdr;
uint64_t srvid;
uint32_t datalen;
uint8_t data[1];
};
static size_t ctdb_message_data_len(union ctdb_message_data *mdata,
uint64_t srvid)
{
size_t len = 0;
switch (srvid) {
case CTDB_SRVID_ELECTION:
len = ctdb_election_message_len(mdata->election);
break;
case CTDB_SRVID_RECONFIGURE:
break;
case CTDB_SRVID_RELEASE_IP:
len = ctdb_string_len(mdata->ipaddr);
break;
case CTDB_SRVID_TAKE_IP:
len = ctdb_string_len(mdata->ipaddr);
break;
case CTDB_SRVID_SET_NODE_FLAGS:
len = ctdb_node_flag_change_len(mdata->flag_change);
break;
case CTDB_SRVID_RECD_UPDATE_IP:
len = ctdb_public_ip_len(mdata->pubip);
break;
case CTDB_SRVID_VACUUM_FETCH:
len = ctdb_rec_buffer_len(mdata->recbuf);
break;
case CTDB_SRVID_DETACH_DATABASE:
len = ctdb_uint32_len(mdata->db_id);
break;
case CTDB_SRVID_MEM_DUMP:
len = ctdb_srvid_message_len(mdata->msg);
break;
case CTDB_SRVID_PUSH_NODE_FLAGS:
len = ctdb_node_flag_change_len(mdata->flag_change);
break;
case CTDB_SRVID_RELOAD_NODES:
break;
case CTDB_SRVID_TAKEOVER_RUN:
len = ctdb_srvid_message_len(mdata->msg);
break;
case CTDB_SRVID_REBALANCE_NODE:
len = ctdb_uint32_len(mdata->pnn);
break;
case CTDB_SRVID_DISABLE_TAKEOVER_RUNS:
len = ctdb_disable_message_len(mdata->disable);
break;
case CTDB_SRVID_DISABLE_RECOVERIES:
len = ctdb_disable_message_len(mdata->disable);
break;
case CTDB_SRVID_DISABLE_IP_CHECK:
len = ctdb_uint32_len(mdata->timeout);
break;
}
return len;
}
static void ctdb_message_data_push(union ctdb_message_data *mdata,
uint64_t srvid, uint8_t *buf)
{
switch (srvid) {
case CTDB_SRVID_ELECTION:
ctdb_election_message_push(mdata->election, buf);
break;
case CTDB_SRVID_RECONFIGURE:
break;
case CTDB_SRVID_RELEASE_IP:
ctdb_string_push(mdata->ipaddr, buf);
break;
case CTDB_SRVID_TAKE_IP:
ctdb_string_push(mdata->ipaddr, buf);
break;
case CTDB_SRVID_SET_NODE_FLAGS:
ctdb_node_flag_change_push(mdata->flag_change, buf);
break;
case CTDB_SRVID_RECD_UPDATE_IP:
ctdb_public_ip_push(mdata->pubip, buf);
break;
case CTDB_SRVID_VACUUM_FETCH:
ctdb_rec_buffer_push(mdata->recbuf, buf);
break;
case CTDB_SRVID_DETACH_DATABASE:
ctdb_uint32_push(mdata->db_id, buf);
break;
case CTDB_SRVID_MEM_DUMP:
ctdb_srvid_message_push(mdata->msg, buf);
break;
case CTDB_SRVID_PUSH_NODE_FLAGS:
ctdb_node_flag_change_push(mdata->flag_change, buf);
break;
case CTDB_SRVID_RELOAD_NODES:
break;
case CTDB_SRVID_TAKEOVER_RUN:
ctdb_srvid_message_push(mdata->msg, buf);
break;
case CTDB_SRVID_REBALANCE_NODE:
ctdb_uint32_push(mdata->pnn, buf);
break;
case CTDB_SRVID_DISABLE_TAKEOVER_RUNS:
ctdb_disable_message_push(mdata->disable, buf);
break;
case CTDB_SRVID_DISABLE_RECOVERIES:
ctdb_disable_message_push(mdata->disable, buf);
break;
case CTDB_SRVID_DISABLE_IP_CHECK:
ctdb_uint32_push(mdata->timeout, buf);
break;
}
}
static int ctdb_message_data_pull(uint8_t *buf, size_t buflen,
uint64_t srvid, TALLOC_CTX *mem_ctx,
union ctdb_message_data *mdata)
{
int ret = 0;
switch (srvid) {
case CTDB_SRVID_ELECTION:
ret = ctdb_election_message_pull(buf, buflen, mem_ctx,
&mdata->election);
break;
case CTDB_SRVID_RECONFIGURE:
break;
case CTDB_SRVID_RELEASE_IP:
ret = ctdb_string_pull(buf, buflen, mem_ctx, &mdata->ipaddr);
break;
case CTDB_SRVID_TAKE_IP:
ret = ctdb_string_pull(buf, buflen, mem_ctx, &mdata->ipaddr);
break;
case CTDB_SRVID_SET_NODE_FLAGS:
ret = ctdb_node_flag_change_pull(buf, buflen, mem_ctx,
&mdata->flag_change);
break;
case CTDB_SRVID_RECD_UPDATE_IP:
ret = ctdb_public_ip_pull(buf, buflen, mem_ctx,
&mdata->pubip);
break;
case CTDB_SRVID_VACUUM_FETCH:
ret = ctdb_rec_buffer_pull(buf, buflen, mem_ctx,
&mdata->recbuf);
break;
case CTDB_SRVID_DETACH_DATABASE:
ret = ctdb_uint32_pull(buf, buflen, mem_ctx, &mdata->db_id);
break;
case CTDB_SRVID_MEM_DUMP:
ret = ctdb_srvid_message_pull(buf, buflen, mem_ctx,
&mdata->msg);
break;
case CTDB_SRVID_PUSH_NODE_FLAGS:
ret = ctdb_node_flag_change_pull(buf, buflen, mem_ctx,
&mdata->flag_change);
break;
case CTDB_SRVID_RELOAD_NODES:
break;
case CTDB_SRVID_TAKEOVER_RUN:
ret = ctdb_srvid_message_pull(buf, buflen, mem_ctx,
&mdata->msg);
break;
case CTDB_SRVID_REBALANCE_NODE:
ret = ctdb_uint32_pull(buf, buflen, mem_ctx, &mdata->pnn);
break;
case CTDB_SRVID_DISABLE_TAKEOVER_RUNS:
ret = ctdb_disable_message_pull(buf, buflen, mem_ctx,
&mdata->disable);
break;
case CTDB_SRVID_DISABLE_RECOVERIES:
ret = ctdb_disable_message_pull(buf, buflen, mem_ctx,
&mdata->disable);
break;
case CTDB_SRVID_DISABLE_IP_CHECK:
ret = ctdb_uint32_pull(buf, buflen, mem_ctx, &mdata->timeout);
break;
}
return ret;
}
int ctdb_req_message_push(struct ctdb_req_header *h,
struct ctdb_req_message *message,
TALLOC_CTX *mem_ctx,
uint8_t **pkt, size_t *pkt_len)
{
struct ctdb_req_message_wire *wire;
uint8_t *buf;
size_t length, buflen, datalen;
int ret;
datalen = ctdb_message_data_len(&message->data, message->srvid);
length = offsetof(struct ctdb_req_message_wire, data) + datalen;
ret = allocate_pkt(mem_ctx, length, &buf, &buflen);
if (ret != 0) {
return ret;
}
wire = (struct ctdb_req_message_wire *)buf;
h->length = buflen;
memcpy(&wire->hdr, h, sizeof(struct ctdb_req_header));
wire->srvid = message->srvid;
wire->datalen = datalen;
ctdb_message_data_push(&message->data, message->srvid, wire->data);
*pkt = buf;
*pkt_len = buflen;
return 0;
}
int ctdb_req_message_pull(uint8_t *pkt, size_t pkt_len,
struct ctdb_req_header *h,
TALLOC_CTX *mem_ctx,
struct ctdb_req_message *message)
{
struct ctdb_req_message_wire *wire =
(struct ctdb_req_message_wire *)pkt;
size_t length;
int ret;
length = offsetof(struct ctdb_req_message_wire, data);
if (pkt_len < length) {
return EMSGSIZE;
}
if (pkt_len < length + wire->datalen) {
return EMSGSIZE;
}
memcpy(h, &wire->hdr, sizeof(struct ctdb_req_header));
message->srvid = wire->srvid;
ret = ctdb_message_data_pull(wire->data, wire->datalen, wire->srvid,
mem_ctx, &message->data);
return ret;
}
int ctdb_req_message_data_push(struct ctdb_req_header *h,
struct ctdb_req_message_data *message,
TALLOC_CTX *mem_ctx,
uint8_t **pkt, size_t *pkt_len)
{
struct ctdb_req_message_wire *wire;
uint8_t *buf;
size_t length, buflen;
int ret;
length = offsetof(struct ctdb_req_message_wire, data) +
message->data.dsize;
ret = allocate_pkt(mem_ctx, length, &buf, &buflen);
if (ret != 0) {
return ret;
}
wire = (struct ctdb_req_message_wire *)buf;
h->length = buflen;
memcpy(&wire->hdr, h, sizeof(struct ctdb_req_header));
wire->srvid = message->srvid;
wire->datalen = message->data.dsize;
if (message->data.dsize > 0) {
memcpy(wire->data, message->data.dptr, message->data.dsize);
}
*pkt = buf;
*pkt_len = buflen;
return 0;
}
int ctdb_req_message_data_pull(uint8_t *pkt, size_t pkt_len,
struct ctdb_req_header *h,
TALLOC_CTX *mem_ctx,
struct ctdb_req_message_data *message)
{
struct ctdb_req_message_wire *wire =
(struct ctdb_req_message_wire *)pkt;
size_t length;
length = offsetof(struct ctdb_req_message_wire, data);
if (pkt_len < length) {
return EMSGSIZE;
}
if (pkt_len < length + wire->datalen) {
return EMSGSIZE;
}
memcpy(h, &wire->hdr, sizeof(struct ctdb_req_header));
message->srvid = wire->srvid;
message->data.dsize = wire->datalen;
if (wire->datalen > 0) {
message->data.dptr = talloc_memdup(mem_ctx, wire->data,
wire->datalen);
if (message->data.dptr == NULL) {
return ENOMEM;
}
}
return 0;
}
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