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/*
* whoisdas.c
*
* Copyright (C) 2016-22 - 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_WHOIS_DAS
#include "ndpi_api.h"
#include "ndpi_private.h"
static void ndpi_search_whois_das(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow)
{
struct ndpi_packet_struct *packet = &ndpi_struct->packet;
NDPI_LOG_DBG(ndpi_struct, "search WHOIS/DAS\n");
if(packet->tcp != NULL) {
u_int16_t sport = ntohs(packet->tcp->source), dport = ntohs(packet->tcp->dest);
if((((sport == 43) || (dport == 43)) || ((sport == 4343) || (dport == 4343))) &&
packet->payload_packet_len > 2 &&
packet->payload[packet->payload_packet_len - 2] == '\r' &&
packet->payload[packet->payload_packet_len - 1] == '\n') {
ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_WHOIS_DAS, NDPI_PROTOCOL_UNKNOWN, NDPI_CONFIDENCE_DPI);
if((dport == 43) || (dport == 4343)) { /* Request */
ndpi_hostname_sni_set(flow, &packet->payload[0], packet->payload_packet_len - 2, NDPI_HOSTNAME_NORM_ALL); /* Skip \r\n */
NDPI_LOG_INFO(ndpi_struct, "[WHOIS/DAS] %s\n", flow->host_server_name);
}
return;
}
}
NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
}
void init_whois_das_dissector(struct ndpi_detection_module_struct *ndpi_struct, u_int32_t *id)
{
ndpi_set_bitmask_protocol_detection("Whois-DAS", ndpi_struct, *id,
NDPI_PROTOCOL_WHOIS_DAS,
ndpi_search_whois_das,
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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