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/*
* skinny.c
*
* Copyright (C) 2013 Remy Mudingay <mudingay@ill.fr>
*
* This module 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.
*
* This module 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.
* If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "ndpi_protocol_ids.h"
#define NDPI_CURRENT_PROTO NDPI_PROTOCOL_SKINNY
#include "ndpi_api.h"
static void ndpi_int_skinny_add_connection(struct ndpi_detection_module_struct
*ndpi_struct, struct ndpi_flow_struct *flow)
{
ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_SKINNY, NDPI_PROTOCOL_UNKNOWN);
}
void ndpi_search_skinny(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow)
{
struct ndpi_packet_struct *packet = &flow->packet;
u_int16_t dport = 0, sport = 0;
const char pattern_9_bytes[9] = { 0x24, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
const char pattern_8_bytes[8] = { 0x38, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
const char keypadmsg_8_bytes[8] = { 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
const char selectmsg_8_bytes[8] = { 0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
NDPI_LOG_DBG(ndpi_struct, "search for SKINNY\n");
if(packet->tcp != NULL) {
sport = ntohs(packet->tcp->source), dport = ntohs(packet->tcp->dest);
NDPI_LOG_DBG2(ndpi_struct, "calculating SKINNY over tcp\n");
if (dport == 2000 && ((packet->payload_packet_len == 24 &&
memcmp(&packet->payload[0], keypadmsg_8_bytes, 8) == 0)
|| ((packet->payload_packet_len == 64) && memcmp(&packet->payload[0], pattern_8_bytes, 8) == 0))) {
NDPI_LOG_INFO(ndpi_struct, "found skinny\n");
ndpi_int_skinny_add_connection(ndpi_struct, flow);
} else if (sport == 2000 && ((packet->payload_packet_len == 28 &&
memcmp(&packet->payload[0], selectmsg_8_bytes, 8) == 0 ) ||
(packet->payload_packet_len == 44 &&
memcmp(&packet->payload[0], pattern_9_bytes, 9) == 0))) {
NDPI_LOG_INFO(ndpi_struct, "found skinny\n");
ndpi_int_skinny_add_connection(ndpi_struct, flow);
}
} else {
NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
}
}
void init_skinny_dissector(struct ndpi_detection_module_struct *ndpi_struct, u_int32_t *id, NDPI_PROTOCOL_BITMASK *detection_bitmask)
{
ndpi_set_bitmask_protocol_detection("CiscoSkinny", ndpi_struct, detection_bitmask, *id,
NDPI_PROTOCOL_SKINNY,
ndpi_search_skinny,
NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_TCP_WITH_PAYLOAD_WITHOUT_RETRANSMISSION,
SAVE_DETECTION_BITMASK_AS_UNKNOWN,
ADD_TO_DETECTION_BITMASK);
*id += 1;
}
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