mirror of
https://github.com/vel21ripn/nDPI.git
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91 lines
2.8 KiB
C
91 lines
2.8 KiB
C
/*
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* tds.c
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*
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* Copyright (C) 2009-2011 by ipoque GmbH
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* Copyright (C) 2011-15 - ntop.org
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*
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* This file is part of nDPI, an open source deep packet inspection
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* library based on the OpenDPI and PACE technology by ipoque GmbH
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*
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* nDPI is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser 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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*
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* nDPI 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 Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with nDPI. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "ndpi_protocols.h"
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#ifdef NDPI_PROTOCOL_TDS
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static void ndpi_int_tds_add_connection(struct ndpi_detection_module_struct
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*ndpi_struct, struct ndpi_flow_struct *flow)
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{
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ndpi_int_add_connection(ndpi_struct, flow, NDPI_PROTOCOL_TDS, NDPI_REAL_PROTOCOL);
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}
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void ndpi_search_tds_tcp(struct ndpi_detection_module_struct
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*ndpi_struct, struct ndpi_flow_struct *flow)
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{
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struct ndpi_packet_struct *packet = &flow->packet;
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// struct ndpi_id_struct *src=ndpi_struct->src;
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// struct ndpi_id_struct *dst=ndpi_struct->dst;
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if (packet->payload_packet_len > 8
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&& packet->payload_packet_len < 512
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&& packet->payload[1] < 0x02
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&& ntohs(get_u_int16_t(packet->payload, 2)) == packet->payload_packet_len && get_u_int16_t(packet->payload, 4) == 0x0000) {
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if (flow->l4.tcp.tds_stage == 0) {
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if (packet->payload[0] != 0x02 && packet->payload[0] != 0x07 && packet->payload[0] != 0x12) {
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goto exclude_tds;
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} else {
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flow->l4.tcp.tds_stage = 1 + packet->packet_direction;
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flow->l4.tcp.tds_login_version = packet->payload[0];
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return;
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}
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} else if (flow->l4.tcp.tds_stage == 2 - packet->packet_direction) {
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switch (flow->l4.tcp.tds_login_version) {
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case 0x12:
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if (packet->payload[0] == 0x04) {
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flow->l4.tcp.tds_stage = 3 + packet->packet_direction;
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return;
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} else {
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goto exclude_tds;
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}
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//TODO: add more cases for other versions
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default:
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goto exclude_tds;
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}
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} else if (flow->l4.tcp.tds_stage == 4 - packet->packet_direction) {
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switch (flow->l4.tcp.tds_login_version) {
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case 0x12:
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if (packet->payload[0] == 0x12) {
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NDPI_LOG(NDPI_PROTOCOL_TDS, ndpi_struct, NDPI_LOG_DEBUG, "TDS detected\n");
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ndpi_int_tds_add_connection(ndpi_struct, flow);
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return;
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} else {
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goto exclude_tds;
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}
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//TODO: add more cases for other versions
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default:
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goto exclude_tds;
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}
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}
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}
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exclude_tds:
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NDPI_ADD_PROTOCOL_TO_BITMASK(flow->excluded_protocol_bitmask, NDPI_PROTOCOL_TDS);
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}
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#endif
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