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/*
* mysql.c
*
* Copyright (C) 2009-2011 by ipoque GmbH
* Copyright (C) 2011-15 - ntop.org
*
* This file is part of nDPI, an open source deep packet inspection
* library based on the OpenDPI and PACE technology by ipoque GmbH
*
* nDPI is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* nDPI 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with nDPI. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "ndpi_protocols.h"
#ifdef NDPI_PROTOCOL_MYSQL
static void ndpi_int_mysql_add_connection(struct ndpi_detection_module_struct
*ndpi_struct, struct ndpi_flow_struct *flow)
{
ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_MYSQL, NDPI_PROTOCOL_UNKNOWN);
}
void ndpi_search_mysql_tcp(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow)
{
struct ndpi_packet_struct *packet = &flow->packet;
// struct ndpi_id_struct *src=ndpi_struct->src;
// struct ndpi_id_struct *dst=ndpi_struct->dst;
if (packet->payload_packet_len > 38 //min length
&& get_u_int16_t(packet->payload, 0) == packet->payload_packet_len - 4 //first 3 bytes are length
&& get_u_int8_t(packet->payload, 2) == 0x00 //3rd byte of packet length
&& get_u_int8_t(packet->payload, 3) == 0x00 //packet sequence number is 0 for startup packet
&& get_u_int8_t(packet->payload, 5) > 0x30 //server version > 0
&& get_u_int8_t(packet->payload, 5) < 0x37 //server version < 7
&& get_u_int8_t(packet->payload, 6) == 0x2e //dot
) {
u_int32_t a;
for (a = 7; a + 31 < packet->payload_packet_len; a++) {
if (packet->payload[a] == 0x00) {
if (get_u_int8_t(packet->payload, a + 13) == 0x00 //filler byte
&& get_u_int64_t(packet->payload, a + 19) == 0x0ULL //13 more
&& get_u_int32_t(packet->payload, a + 27) == 0x0 //filler bytes
&& get_u_int8_t(packet->payload, a + 31) == 0x0) {
NDPI_LOG(NDPI_PROTOCOL_MYSQL, ndpi_struct, NDPI_LOG_DEBUG, "MySQL detected.\n");
ndpi_int_mysql_add_connection(ndpi_struct, flow);
return;
}
break;
}
}
}
NDPI_ADD_PROTOCOL_TO_BITMASK(flow->excluded_protocol_bitmask, NDPI_PROTOCOL_MYSQL);
}
void init_mysql_dissector(struct ndpi_detection_module_struct *ndpi_struct, u_int32_t *id, NDPI_PROTOCOL_BITMASK *detection_bitmask)
{
ndpi_set_bitmask_protocol_detection("MySQL", ndpi_struct, detection_bitmask, *id,
NDPI_PROTOCOL_MYSQL,
ndpi_search_mysql_tcp,
NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_TCP_WITH_PAYLOAD_WITHOUT_RETRANSMISSION,
SAVE_DETECTION_BITMASK_AS_UNKNOWN,
ADD_TO_DETECTION_BITMASK);
*id += 1;
}
#endif
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