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/*
* line.c
*
* Copyright (C) 2019 - ntop.org
*
* 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_protocol_ids.h"
#define NDPI_CURRENT_PROTO NDPI_PROTOCOL_LINE
#include "ndpi_api.h"
static void ndpi_line_report_protocol(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow) {
/* printf("-> payload_len=%u\n", flow->packet.payload_packet_len); */
NDPI_LOG_INFO(ndpi_struct, "found line\n");
ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_LINE, NDPI_PROTOCOL_LINE);
}
void ndpi_search_line(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow) {
struct ndpi_packet_struct *packet = &flow->packet;
NDPI_LOG_DBG(ndpi_struct, "search line\n");
if(packet->iph) {
/* 125.209.252.xxx */
if(((ntohl(packet->iph->saddr) & 0xFFFFFF00 /* 255.255.255.0 */) == 0x7DD1FC00)
|| ((ntohl(packet->iph->daddr) & 0xFFFFFF00 /* 255.255.255.0 */) == 0x7DD1FC00)) {
if(
((packet->payload_packet_len == 110)
&& (flow->packet.payload[0] == 0xB6) && (flow->packet.payload[1] == 0x18)
&& (flow->packet.payload[2] == 0x00) && (flow->packet.payload[3] == 0x6A))
||
((flow->packet.payload[0] == 0xB0) && (flow->packet.payload[1] == 0x78))
) {
ndpi_line_report_protocol(ndpi_struct, flow);
return;
}
}
}
NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
}
void init_line_dissector(struct ndpi_detection_module_struct *ndpi_struct, u_int32_t *id, NDPI_PROTOCOL_BITMASK *detection_bitmask)
{
ndpi_set_bitmask_protocol_detection("Line", ndpi_struct, detection_bitmask, *id,
NDPI_PROTOCOL_LINE,
ndpi_search_line,
NDPI_SELECTION_BITMASK_PROTOCOL_UDP_WITH_PAYLOAD,
SAVE_DETECTION_BITMASK_AS_UNKNOWN,
ADD_TO_DETECTION_BITMASK);
*id += 1;
}
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