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10dbeddab5
If the buffer size provided is not sufficient, then return the required buffer length. Signed-off-by: Amitay Isaacs <amitay@gmail.com> Reviewed-by: Martin Schwenke <martin@meltin.net>
411 lines
9.0 KiB
C
411 lines
9.0 KiB
C
/*
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CTDB protocol marshalling
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Copyright (C) Amitay Isaacs 2015
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "replace.h"
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#include "system/network.h"
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#include <talloc.h>
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#include <tdb.h>
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#include "protocol.h"
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#include "protocol_api.h"
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#include "protocol_private.h"
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struct ctdb_req_message_wire {
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struct ctdb_req_header hdr;
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uint64_t srvid;
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uint32_t datalen;
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uint8_t data[1];
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};
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static size_t ctdb_message_data_len(union ctdb_message_data *mdata,
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uint64_t srvid)
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{
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size_t len = 0;
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switch (srvid) {
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case CTDB_SRVID_BANNING:
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len = ctdb_uint32_len(mdata->pnn);
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break;
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case CTDB_SRVID_ELECTION:
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len = ctdb_election_message_len(mdata->election);
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break;
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case CTDB_SRVID_RECONFIGURE:
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break;
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case CTDB_SRVID_RELEASE_IP:
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len = ctdb_string_len(mdata->ipaddr);
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break;
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case CTDB_SRVID_TAKE_IP:
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len = ctdb_string_len(mdata->ipaddr);
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break;
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case CTDB_SRVID_SET_NODE_FLAGS:
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len = ctdb_node_flag_change_len(mdata->flag_change);
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break;
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case CTDB_SRVID_RECD_UPDATE_IP:
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len = ctdb_public_ip_len(mdata->pubip);
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break;
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case CTDB_SRVID_VACUUM_FETCH:
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len = ctdb_rec_buffer_len(mdata->recbuf);
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break;
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case CTDB_SRVID_DETACH_DATABASE:
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len = ctdb_uint32_len(mdata->db_id);
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break;
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case CTDB_SRVID_MEM_DUMP:
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len = ctdb_srvid_message_len(mdata->msg);
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break;
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case CTDB_SRVID_PUSH_NODE_FLAGS:
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len = ctdb_node_flag_change_len(mdata->flag_change);
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break;
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case CTDB_SRVID_RELOAD_NODES:
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break;
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case CTDB_SRVID_TAKEOVER_RUN:
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len = ctdb_srvid_message_len(mdata->msg);
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break;
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case CTDB_SRVID_REBALANCE_NODE:
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len = ctdb_uint32_len(mdata->pnn);
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break;
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case CTDB_SRVID_DISABLE_TAKEOVER_RUNS:
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len = ctdb_disable_message_len(mdata->disable);
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break;
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case CTDB_SRVID_DISABLE_RECOVERIES:
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len = ctdb_disable_message_len(mdata->disable);
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break;
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case CTDB_SRVID_DISABLE_IP_CHECK:
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len = ctdb_uint32_len(mdata->timeout);
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break;
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default:
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len = ctdb_tdb_data_len(mdata->data);
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break;
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}
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return len;
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}
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static void ctdb_message_data_push(union ctdb_message_data *mdata,
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uint64_t srvid, uint8_t *buf)
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{
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switch (srvid) {
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case CTDB_SRVID_BANNING:
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ctdb_uint32_push(mdata->pnn, buf);
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break;
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case CTDB_SRVID_ELECTION:
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ctdb_election_message_push(mdata->election, buf);
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break;
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case CTDB_SRVID_RECONFIGURE:
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break;
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case CTDB_SRVID_RELEASE_IP:
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ctdb_string_push(mdata->ipaddr, buf);
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break;
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case CTDB_SRVID_TAKE_IP:
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ctdb_string_push(mdata->ipaddr, buf);
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break;
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case CTDB_SRVID_SET_NODE_FLAGS:
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ctdb_node_flag_change_push(mdata->flag_change, buf);
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break;
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case CTDB_SRVID_RECD_UPDATE_IP:
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ctdb_public_ip_push(mdata->pubip, buf);
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break;
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case CTDB_SRVID_VACUUM_FETCH:
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ctdb_rec_buffer_push(mdata->recbuf, buf);
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break;
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case CTDB_SRVID_DETACH_DATABASE:
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ctdb_uint32_push(mdata->db_id, buf);
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break;
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case CTDB_SRVID_MEM_DUMP:
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ctdb_srvid_message_push(mdata->msg, buf);
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break;
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case CTDB_SRVID_PUSH_NODE_FLAGS:
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ctdb_node_flag_change_push(mdata->flag_change, buf);
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break;
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case CTDB_SRVID_RELOAD_NODES:
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break;
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case CTDB_SRVID_TAKEOVER_RUN:
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ctdb_srvid_message_push(mdata->msg, buf);
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break;
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case CTDB_SRVID_REBALANCE_NODE:
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ctdb_uint32_push(mdata->pnn, buf);
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break;
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case CTDB_SRVID_DISABLE_TAKEOVER_RUNS:
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ctdb_disable_message_push(mdata->disable, buf);
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break;
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case CTDB_SRVID_DISABLE_RECOVERIES:
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ctdb_disable_message_push(mdata->disable, buf);
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break;
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case CTDB_SRVID_DISABLE_IP_CHECK:
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ctdb_uint32_push(mdata->timeout, buf);
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break;
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default:
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ctdb_tdb_data_push(mdata->data, buf);
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break;
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}
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}
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static int ctdb_message_data_pull(uint8_t *buf, size_t buflen,
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uint64_t srvid, TALLOC_CTX *mem_ctx,
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union ctdb_message_data *mdata)
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{
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int ret = 0;
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switch (srvid) {
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case CTDB_SRVID_BANNING:
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ret = ctdb_uint32_pull(buf, buflen, mem_ctx, &mdata->pnn);
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break;
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case CTDB_SRVID_ELECTION:
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ret = ctdb_election_message_pull(buf, buflen, mem_ctx,
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&mdata->election);
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break;
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case CTDB_SRVID_RECONFIGURE:
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break;
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case CTDB_SRVID_RELEASE_IP:
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ret = ctdb_string_pull(buf, buflen, mem_ctx, &mdata->ipaddr);
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break;
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case CTDB_SRVID_TAKE_IP:
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ret = ctdb_string_pull(buf, buflen, mem_ctx, &mdata->ipaddr);
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break;
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case CTDB_SRVID_SET_NODE_FLAGS:
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ret = ctdb_node_flag_change_pull(buf, buflen, mem_ctx,
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&mdata->flag_change);
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break;
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case CTDB_SRVID_RECD_UPDATE_IP:
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ret = ctdb_public_ip_pull(buf, buflen, mem_ctx,
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&mdata->pubip);
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break;
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case CTDB_SRVID_VACUUM_FETCH:
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ret = ctdb_rec_buffer_pull(buf, buflen, mem_ctx,
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&mdata->recbuf);
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break;
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case CTDB_SRVID_DETACH_DATABASE:
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ret = ctdb_uint32_pull(buf, buflen, mem_ctx, &mdata->db_id);
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break;
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case CTDB_SRVID_MEM_DUMP:
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ret = ctdb_srvid_message_pull(buf, buflen, mem_ctx,
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&mdata->msg);
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break;
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case CTDB_SRVID_PUSH_NODE_FLAGS:
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ret = ctdb_node_flag_change_pull(buf, buflen, mem_ctx,
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&mdata->flag_change);
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break;
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case CTDB_SRVID_RELOAD_NODES:
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break;
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case CTDB_SRVID_TAKEOVER_RUN:
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ret = ctdb_srvid_message_pull(buf, buflen, mem_ctx,
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&mdata->msg);
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break;
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case CTDB_SRVID_REBALANCE_NODE:
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ret = ctdb_uint32_pull(buf, buflen, mem_ctx, &mdata->pnn);
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break;
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case CTDB_SRVID_DISABLE_TAKEOVER_RUNS:
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ret = ctdb_disable_message_pull(buf, buflen, mem_ctx,
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&mdata->disable);
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break;
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case CTDB_SRVID_DISABLE_RECOVERIES:
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ret = ctdb_disable_message_pull(buf, buflen, mem_ctx,
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&mdata->disable);
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break;
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case CTDB_SRVID_DISABLE_IP_CHECK:
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ret = ctdb_uint32_pull(buf, buflen, mem_ctx, &mdata->timeout);
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break;
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default:
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ret = ctdb_tdb_data_pull(buf, buflen, mem_ctx, &mdata->data);
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break;
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}
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return ret;
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}
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size_t ctdb_req_message_len(struct ctdb_req_header *h,
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struct ctdb_req_message *c)
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{
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return offsetof(struct ctdb_req_message_wire, data) +
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ctdb_message_data_len(&c->data, c->srvid);
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}
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int ctdb_req_message_push(struct ctdb_req_header *h,
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struct ctdb_req_message *message,
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uint8_t *buf, size_t *buflen)
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{
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struct ctdb_req_message_wire *wire =
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(struct ctdb_req_message_wire *)buf;
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size_t length;
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length = ctdb_req_message_len(h, message);
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if (*buflen < length) {
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*buflen = length;
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return EMSGSIZE;
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}
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h->length = *buflen;
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ctdb_req_header_push(h, (uint8_t *)&wire->hdr);
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wire->srvid = message->srvid;
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wire->datalen = ctdb_message_data_len(&message->data, message->srvid);
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ctdb_message_data_push(&message->data, message->srvid, wire->data);
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return 0;
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}
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int ctdb_req_message_pull(uint8_t *buf, size_t buflen,
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struct ctdb_req_header *h,
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TALLOC_CTX *mem_ctx,
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struct ctdb_req_message *c)
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{
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struct ctdb_req_message_wire *wire =
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(struct ctdb_req_message_wire *)buf;
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size_t length;
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int ret;
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length = offsetof(struct ctdb_req_message_wire, data);
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if (buflen < length) {
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return EMSGSIZE;
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}
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if (buflen < length + wire->datalen) {
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return EMSGSIZE;
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}
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if (h != NULL) {
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ret = ctdb_req_header_pull((uint8_t *)&wire->hdr, buflen, h);
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if (ret != 0) {
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return ret;
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}
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}
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c->srvid = wire->srvid;
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ret = ctdb_message_data_pull(wire->data, wire->datalen, wire->srvid,
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mem_ctx, &c->data);
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return ret;
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}
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size_t ctdb_req_message_data_len(struct ctdb_req_header *h,
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struct ctdb_req_message_data *c)
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{
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return offsetof(struct ctdb_req_message_wire, data) +
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ctdb_tdb_data_len(c->data);
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}
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int ctdb_req_message_data_push(struct ctdb_req_header *h,
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struct ctdb_req_message_data *message,
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uint8_t *buf, size_t *buflen)
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{
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struct ctdb_req_message_wire *wire =
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(struct ctdb_req_message_wire *)buf;
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size_t length;
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length = ctdb_req_message_data_len(h, message);
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if (*buflen < length) {
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*buflen = length;
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return EMSGSIZE;
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}
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h->length = *buflen;
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ctdb_req_header_push(h, (uint8_t *)&wire->hdr);
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wire->srvid = message->srvid;
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wire->datalen = ctdb_tdb_data_len(message->data);
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ctdb_tdb_data_push(message->data, wire->data);
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return 0;
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}
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int ctdb_req_message_data_pull(uint8_t *buf, size_t buflen,
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struct ctdb_req_header *h,
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TALLOC_CTX *mem_ctx,
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struct ctdb_req_message_data *c)
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{
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struct ctdb_req_message_wire *wire =
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(struct ctdb_req_message_wire *)buf;
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size_t length;
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int ret;
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length = offsetof(struct ctdb_req_message_wire, data);
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if (buflen < length) {
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return EMSGSIZE;
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}
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if (buflen < length + wire->datalen) {
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return EMSGSIZE;
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}
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if (h != NULL) {
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ret = ctdb_req_header_pull((uint8_t *)&wire->hdr, buflen, h);
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if (ret != 0) {
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return ret;
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}
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}
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c->srvid = wire->srvid;
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ret = ctdb_tdb_data_pull(wire->data, wire->datalen,
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mem_ctx, &c->data);
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if (ret != 0) {
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return ret;
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}
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return 0;
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}
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