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/*
* icecast.c
*
* Copyright (C) 2009-11 - ipoque GmbH
* Copyright (C) 2011-22 - 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_protocol_ids.h"
#define NDPI_CURRENT_PROTO NDPI_PROTOCOL_ICECAST
#include "ndpi_api.h"
static void ndpi_int_icecast_add_connection(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow)
{
ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_ICECAST, NDPI_PROTOCOL_UNKNOWN, NDPI_CONFIDENCE_DPI);
}
void ndpi_search_icecast_tcp(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow)
{
struct ndpi_packet_struct *packet = &ndpi_struct->packet;
u_int16_t i;
NDPI_LOG_DBG(ndpi_struct, "search icecast\n");
if((packet->payload_packet_len < 500 &&
packet->payload_packet_len >= 7 && memcmp(packet->payload, "SOURCE ", 7) == 0)
|| flow->l4.tcp.icecast_stage) {
ndpi_parse_packet_line_info_any(ndpi_struct, flow);
NDPI_LOG_DBG2(ndpi_struct, "Icecast lines=%d\n", packet->parsed_lines);
for (i = 0; i < packet->parsed_lines; i++) {
if(packet->line[i].ptr != NULL && packet->line[i].len > 4
&& memcmp(packet->line[i].ptr, "ice-", 4) == 0) {
NDPI_LOG_INFO(ndpi_struct, "found Icecast\n");
ndpi_int_icecast_add_connection(ndpi_struct, flow);
return;
}
}
if(packet->parsed_lines < 1 && !flow->l4.tcp.icecast_stage) {
flow->l4.tcp.icecast_stage = 1;
return;
}
}
if(flow == NULL) return;
if((packet->packet_direction == flow->setup_packet_direction)
&& (flow->packet_counter < 10)) {
return;
}
if(packet->packet_direction != flow->setup_packet_direction) {
/* server answer, now test Server for Icecast */
ndpi_parse_packet_line_info(ndpi_struct, flow);
if((packet->server_line.ptr != NULL)
&& (packet->server_line.len > NDPI_STATICSTRING_LEN("Icecast"))
&& memcmp(packet->server_line.ptr, "Icecast",
NDPI_STATICSTRING_LEN("Icecast")) == 0) {
/* TODO maybe store the previous protocol type as subtype?
* e.g. ogg or mpeg
*/
NDPI_LOG_INFO(ndpi_struct, "found Icecast\n");
ndpi_int_icecast_add_connection(ndpi_struct, flow);
return;
}
}
NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
}
void init_icecast_dissector(struct ndpi_detection_module_struct *ndpi_struct, u_int32_t *id, NDPI_PROTOCOL_BITMASK *detection_bitmask)
{
ndpi_set_bitmask_protocol_detection("IceCast", ndpi_struct, detection_bitmask, *id,
NDPI_PROTOCOL_ICECAST,
ndpi_search_icecast_tcp,
NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_TCP_WITH_PAYLOAD,
SAVE_DETECTION_BITMASK_AS_UNKNOWN,
ADD_TO_DETECTION_BITMASK);
*id += 1;
}
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