112 lines
2.7 KiB
C++
112 lines
2.7 KiB
C++
/*
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* Copyright (c) 2016 MariaDB Corporation Ab
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*
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* Use of this software is governed by the Business Source License included
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* in the LICENSE.TXT file and at www.mariadb.com/bsl11.
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*
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* Change Date: 2022-01-01
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*
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* On the date above, in accordance with the Business Source License, use
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* of this software will be governed by version 2 or later of the General
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* Public License.
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*/
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/**
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* @file maxinfo_error.c - Handle error reporting for the maxinfo router
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*
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* @verbatim
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* Revision History
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*
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* Date Who Description
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* 17/02/15 Mark Riddoch Initial implementation
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*
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* @endverbatim
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*/
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#include "maxinfo.hh"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <maxscale/alloc.h>
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#include <maxscale/service.hh>
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#include <maxscale/session.hh>
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#include <maxscale/router.hh>
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#include <maxscale/modinfo.h>
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#include <maxscale/modutil.hh>
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#include <maxbase/atomic.h>
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#include <maxscale/dcb.hh>
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#include <maxscale/poll.hh>
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/**
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* Process a parse error and send error report to client
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*
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* @param dcb The DCB to send to error
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* @param sql The SQL that had the parse error
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* @param err The parse error code
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*/
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void maxinfo_send_parse_error(DCB* dcb, char* sql, PARSE_ERROR err)
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{
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const char* desc = "";
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char* msg;
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int len;
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switch (err)
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{
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case PARSE_NOERROR:
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desc = "No error";
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break;
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case PARSE_MALFORMED_SHOW:
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desc = "Expected show <command> [like <pattern>]";
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break;
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case PARSE_EXPECTED_LIKE:
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desc = "Expected LIKE <pattern>";
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break;
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case PARSE_SYNTAX_ERROR:
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desc = "Syntax error";
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break;
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}
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len = strlen(sql) + strlen(desc) + 20;
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msg = (char*)MXS_MALLOC(len);
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MXS_ABORT_IF_NULL(msg);
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sprintf(msg, "%s in query '%s'", desc, sql);
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maxinfo_send_error(dcb, 1149, msg);
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MXS_FREE(msg);
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}
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/**
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* Construct an error response
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*
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* @param dcb The DCB to send the error packet to
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* @param msg The slave server instance
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*/
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void maxinfo_send_error(DCB* dcb, int errcode, const char* msg)
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{
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GWBUF* pkt;
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unsigned char* data;
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int len;
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len = strlen(msg) + 9;
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if ((pkt = gwbuf_alloc(len + 4)) == NULL)
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{
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return;
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}
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data = GWBUF_DATA(pkt);
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data[0] = len & 0xff; // Payload length
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data[1] = (len >> 8) & 0xff;
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data[2] = (len >> 16) & 0xff;
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data[3] = 1; // Sequence id
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// Payload
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data[4] = 0xff; // Error indicator
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data[5] = errcode & 0xff; // Error Code
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data[6] = (errcode >> 8) & 0xff;// Error Code
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memcpy(&data[7], "#42000", 6);
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memcpy(&data[13], msg, strlen(msg)); // Error Message
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dcb->func.write(dcb, pkt);
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}
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