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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>
438 lines
9.5 KiB
C
438 lines
9.5 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_call_wire {
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struct ctdb_req_header hdr;
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uint32_t flags;
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uint32_t db_id;
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uint32_t callid;
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uint32_t hopcount;
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uint32_t keylen;
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uint32_t calldatalen;
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uint8_t data[1]; /* key[] followed by calldata[] */
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};
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struct ctdb_reply_call_wire {
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struct ctdb_req_header hdr;
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uint32_t status;
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uint32_t datalen;
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uint8_t data[1];
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};
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struct ctdb_reply_error_wire {
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struct ctdb_req_header hdr;
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uint32_t status;
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uint32_t msglen;
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uint8_t msg[1];
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};
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struct ctdb_req_dmaster_wire {
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struct ctdb_req_header hdr;
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uint32_t db_id;
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uint64_t rsn;
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uint32_t dmaster;
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uint32_t keylen;
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uint32_t datalen;
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uint8_t data[1];
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};
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struct ctdb_reply_dmaster_wire {
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struct ctdb_req_header hdr;
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uint32_t db_id;
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uint64_t rsn;
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uint32_t keylen;
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uint32_t datalen;
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uint8_t data[1];
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};
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size_t ctdb_req_call_len(struct ctdb_req_header *h, struct ctdb_req_call *c)
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{
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return offsetof(struct ctdb_req_call_wire, data) +
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ctdb_tdb_data_len(c->key) + ctdb_tdb_data_len(c->calldata);
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}
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int ctdb_req_call_push(struct ctdb_req_header *h, struct ctdb_req_call *c,
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uint8_t *buf, size_t *buflen)
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{
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struct ctdb_req_call_wire *wire =
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(struct ctdb_req_call_wire *)buf;
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size_t length;
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if (c->key.dsize == 0) {
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return EINVAL;
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}
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length = ctdb_req_call_len(h, c);
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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->flags = c->flags;
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wire->db_id = c->db_id;
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wire->callid = c->callid;
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wire->hopcount = c->hopcount;
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wire->keylen = ctdb_tdb_data_len(c->key);
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wire->calldatalen = ctdb_tdb_data_len(c->calldata);
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ctdb_tdb_data_push(c->key, wire->data);
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ctdb_tdb_data_push(c->calldata, wire->data + wire->keylen);
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return 0;
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}
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int ctdb_req_call_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_call *c)
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{
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struct ctdb_req_call_wire *wire =
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(struct ctdb_req_call_wire *)buf;
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size_t length;
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int ret;
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length = offsetof(struct ctdb_req_call_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->keylen + wire->calldatalen) {
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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->flags = wire->flags;
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c->db_id = wire->db_id;
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c->callid = wire->callid;
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c->hopcount = wire->hopcount;
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ret = ctdb_tdb_data_pull(wire->data, wire->keylen, mem_ctx, &c->key);
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if (ret != 0) {
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return ret;
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}
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ret = ctdb_tdb_data_pull(wire->data + wire->keylen, wire->calldatalen,
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mem_ctx, &c->calldata);
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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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size_t ctdb_reply_call_len(struct ctdb_req_header *h,
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struct ctdb_reply_call *c)
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{
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return offsetof(struct ctdb_reply_call_wire, data) +
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ctdb_tdb_data_len(c->data);
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}
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int ctdb_reply_call_push(struct ctdb_req_header *h, struct ctdb_reply_call *c,
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uint8_t *buf, size_t *buflen)
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{
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struct ctdb_reply_call_wire *wire =
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(struct ctdb_reply_call_wire *)buf;
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size_t length;
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length = ctdb_reply_call_len(h, c);
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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->status = c->status;
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wire->datalen = ctdb_tdb_data_len(c->data);
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ctdb_tdb_data_push(c->data, wire->data);
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return 0;
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}
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int ctdb_reply_call_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_reply_call *c)
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{
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struct ctdb_reply_call_wire *wire =
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(struct ctdb_reply_call_wire *)buf;
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size_t length;
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int ret;
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length = offsetof(struct ctdb_reply_call_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->status = wire->status;
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ret = ctdb_tdb_data_pull(wire->data, wire->datalen, 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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size_t ctdb_reply_error_len(struct ctdb_req_header *h,
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struct ctdb_reply_error *c)
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{
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return offsetof(struct ctdb_reply_error_wire, msg) +
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ctdb_tdb_data_len(c->msg);
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}
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int ctdb_reply_error_push(struct ctdb_req_header *h, struct ctdb_reply_error *c,
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uint8_t *buf, size_t *buflen)
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{
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struct ctdb_reply_error_wire *wire =
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(struct ctdb_reply_error_wire *)buf;
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size_t length;
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length = ctdb_reply_error_len(h, c);
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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->status = c->status;
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wire->msglen = ctdb_tdb_data_len(c->msg);
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ctdb_tdb_data_push(c->msg, wire->msg);
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return 0;
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}
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int ctdb_reply_error_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_reply_error *c)
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{
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struct ctdb_reply_error_wire *wire =
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(struct ctdb_reply_error_wire *)buf;
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size_t length;
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int ret;
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length = offsetof(struct ctdb_reply_error_wire, msg);
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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->msglen) {
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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->status = wire->status;
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ret = ctdb_tdb_data_pull(wire->msg, wire->msglen, mem_ctx, &c->msg);
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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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size_t ctdb_req_dmaster_len(struct ctdb_req_header *h,
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struct ctdb_req_dmaster *c)
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{
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return offsetof(struct ctdb_req_dmaster_wire, data) +
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ctdb_tdb_data_len(c->key) + ctdb_tdb_data_len(c->data);
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}
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int ctdb_req_dmaster_push(struct ctdb_req_header *h, struct ctdb_req_dmaster *c,
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uint8_t *buf, size_t *buflen)
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{
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struct ctdb_req_dmaster_wire *wire =
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(struct ctdb_req_dmaster_wire *)buf;
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size_t length;
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length = ctdb_req_dmaster_len(h, c);
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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->db_id = c->db_id;
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wire->rsn = c->rsn;
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wire->dmaster = c->dmaster;
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wire->keylen = ctdb_tdb_data_len(c->key);
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wire->datalen = ctdb_tdb_data_len(c->data);
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ctdb_tdb_data_push(c->key, wire->data);
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ctdb_tdb_data_push(c->data, wire->data + wire->keylen);
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return 0;
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}
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int ctdb_req_dmaster_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_dmaster *c)
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{
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struct ctdb_req_dmaster_wire *wire =
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(struct ctdb_req_dmaster_wire *)buf;
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size_t length;
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int ret;
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length = offsetof(struct ctdb_req_dmaster_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->keylen + 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->db_id = wire->db_id;
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c->rsn = wire->rsn;
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c->dmaster = wire->dmaster;
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ret = ctdb_tdb_data_pull(wire->data, wire->keylen, mem_ctx, &c->key);
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if (ret != 0) {
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return ret;
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}
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ret = ctdb_tdb_data_pull(wire->data + wire->keylen, 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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size_t ctdb_reply_dmaster_len(struct ctdb_req_header *h,
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struct ctdb_reply_dmaster *c)
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{
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return offsetof(struct ctdb_reply_dmaster_wire, data) +
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ctdb_tdb_data_len(c->key) + ctdb_tdb_data_len(c->data);
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}
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int ctdb_reply_dmaster_push(struct ctdb_req_header *h,
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struct ctdb_reply_dmaster *c,
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uint8_t *buf, size_t *buflen)
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{
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struct ctdb_reply_dmaster_wire *wire =
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(struct ctdb_reply_dmaster_wire *)buf;
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size_t length;
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length = ctdb_reply_dmaster_len(h, c);
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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->db_id = c->db_id;
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wire->rsn = c->rsn;
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wire->keylen = ctdb_tdb_data_len(c->key);
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wire->datalen = ctdb_tdb_data_len(c->data);
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ctdb_tdb_data_push(c->key, wire->data);
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ctdb_tdb_data_push(c->data, wire->data + wire->keylen);
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return 0;
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}
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int ctdb_reply_dmaster_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_reply_dmaster *c)
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{
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struct ctdb_reply_dmaster_wire *wire =
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(struct ctdb_reply_dmaster_wire *)buf;
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size_t length;
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int ret;
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length = offsetof(struct ctdb_reply_dmaster_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->keylen + 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->db_id = wire->db_id;
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c->rsn = wire->rsn;
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ret = ctdb_tdb_data_pull(wire->data, wire->keylen, mem_ctx, &c->key);
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if (ret != 0) {
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return ret;
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}
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ret = ctdb_tdb_data_pull(wire->data + wire->keylen, 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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