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/*
* dropbox.c
*
* Copyright (C) 2011-13 by 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_api.h"
#ifdef NDPI_PROTOCOL_DROPBOX
static void ndpi_int_dropbox_add_connection(struct ndpi_detection_module_struct *ndpi_struct,
struct ndpi_flow_struct *flow,
u_int8_t due_to_correlation)
{
ndpi_int_add_connection(ndpi_struct, flow,
NDPI_PROTOCOL_DROPBOX/* , */
/* due_to_correlation ? NDPI_CORRELATED_PROTOCOL : NDPI_REAL_PROTOCOL */);
}
static void ndpi_check_dropbox(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow)
{
struct ndpi_packet_struct *packet = &flow->packet;
// const u_int8_t *packet_payload = packet->payload;
u_int32_t payload_len = packet->payload_packet_len;
if(packet->udp != NULL) {
u_int16_t dropbox_port = htons(17500);
if((packet->udp->source == dropbox_port)
&& (packet->udp->dest == dropbox_port)) {
if(payload_len > 2) {
if(strncmp((const char *)packet->payload, "{\"", 2) == 0) {
NDPI_LOG(NDPI_PROTOCOL_DROPBOX, ndpi_struct, NDPI_LOG_DEBUG, "Found dropbox.\n");
ndpi_int_dropbox_add_connection(ndpi_struct, flow, 0);
return;
}
}
}
}
NDPI_LOG(NDPI_PROTOCOL_DROPBOX, ndpi_struct, NDPI_LOG_DEBUG, "exclude dropbox.\n");
NDPI_ADD_PROTOCOL_TO_BITMASK(flow->excluded_protocol_bitmask, NDPI_PROTOCOL_DROPBOX);
}
void ndpi_search_dropbox(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow)
{
struct ndpi_packet_struct *packet = &flow->packet;
NDPI_LOG(NDPI_PROTOCOL_DROPBOX, ndpi_struct, NDPI_LOG_DEBUG, "dropbox detection...\n");
/* skip marked packets */
if (packet->detected_protocol_stack[0] != NDPI_PROTOCOL_DROPBOX) {
if (packet->tcp_retransmission == 0) {
ndpi_check_dropbox(ndpi_struct, flow);
}
}
}
#endif
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