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/*
* xdmcp.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_XDMCP
static void ndpi_int_xdmcp_add_connection(struct ndpi_detection_module_struct
*ndpi_struct, struct ndpi_flow_struct *flow)
{
ndpi_int_add_connection(ndpi_struct, flow, NDPI_PROTOCOL_XDMCP, NDPI_REAL_PROTOCOL);
}
void ndpi_search_xdmcp(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;
NDPI_LOG(NDPI_PROTOCOL_XDMCP, ndpi_struct, NDPI_LOG_DEBUG, "search xdmcp.\n");
if (packet->tcp != NULL && (ntohs(packet->tcp->dest) >= 6000 && ntohs(packet->tcp->dest) <= 6005)
&& packet->payload_packet_len == 48
&& packet->payload[0] == 0x6c && packet->payload[1] == 0x00
&& ntohs(get_u_int16_t(packet->payload, 6)) == 0x1200 && ntohs(get_u_int16_t(packet->payload, 8)) == 0x1000) {
NDPI_LOG(NDPI_PROTOCOL_XDMCP, ndpi_struct, NDPI_LOG_DEBUG, "found xdmcp over tcp.\n");
ndpi_int_xdmcp_add_connection(ndpi_struct, flow);
return;
}
if (packet->udp != NULL && ntohs(packet->udp->dest) == 177
&& packet->payload_packet_len >= 6 && packet->payload_packet_len == 6 + ntohs(get_u_int16_t(packet->payload, 4))
&& ntohs(get_u_int16_t(packet->payload, 0)) == 0x0001 && ntohs(get_u_int16_t(packet->payload, 2)) == 0x0002) {
NDPI_LOG(NDPI_PROTOCOL_XDMCP, ndpi_struct, NDPI_LOG_DEBUG, "found xdmcp over udp.\n");
ndpi_int_xdmcp_add_connection(ndpi_struct, flow);
return;
}
NDPI_LOG(NDPI_PROTOCOL_XDMCP, ndpi_struct, NDPI_LOG_DEBUG, "exclude xdmcp.\n");
NDPI_ADD_PROTOCOL_TO_BITMASK(flow->excluded_protocol_bitmask, NDPI_PROTOCOL_XDMCP);
}
#endif
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