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/*
* spotify.c
*
* Copyright (C) 2011-18 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_protocol_ids.h"
#define NDPI_CURRENT_PROTO NDPI_PROTOCOL_SPOTIFY
#include "ndpi_api.h"
static void ndpi_int_spotify_add_connection(struct ndpi_detection_module_struct *ndpi_struct,
struct ndpi_flow_struct *flow,
u_int8_t due_to_correlation)
{
ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_SPOTIFY, NDPI_PROTOCOL_UNKNOWN, NDPI_CONFIDENCE_DPI);
}
static void ndpi_check_spotify(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow)
{
struct ndpi_packet_struct *packet = &ndpi_struct->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 spotify_port = htons(57621);
if((packet->udp->source == spotify_port)
&& (packet->udp->dest == spotify_port)) {
if(payload_len >= 7) {
if(memcmp(packet->payload, "SpotUdp", 7) == 0) {
NDPI_LOG_INFO(ndpi_struct, "found spotify udp dissector\n");
ndpi_int_spotify_add_connection(ndpi_struct, flow, 0);
return;
}
}
}
} else if(packet->tcp != NULL) {
if(payload_len >= 9 && packet->payload[0] == 0x00 && packet->payload[1] == 0x04 &&
packet->payload[2] == 0x00 && packet->payload[3] == 0x00&&
packet->payload[6] == 0x52 && (packet->payload[7] == 0x0e || packet->payload[7] == 0x0f) &&
packet->payload[8] == 0x50 ) {
NDPI_LOG_INFO(ndpi_struct, "found spotify tcp dissector\n");
ndpi_int_spotify_add_connection(ndpi_struct, flow, 0);
}
if(packet->iph /* IPv4 Only: we need to support packet->iphv6 at some point */) {
/* if(flow->detected_protocol_stack[0] == NDPI_PROTOCOL_UNKNOWN) */ {
/*
Spotify
78.31.8.0 - 78.31.15.255 (78.31.8.0/22)
AS29017
193.235.232.0 - 193.235.235.255 (193.235.232.0/22)
AS29017
194.132.196.0 - 194.132.199.255 (194.132.198.147/22)
AS43650
194.132.176.0 - 194.132.179.255 (194.132.176.0/22)
AS43650
194.132.162.0 - 194.132.163.255 (194.132.162.0/24)
AS43650
*/
//printf("%08X - %08X\n", ntohl(packet->iph->saddr), ntohl(packet->iph->daddr));
unsigned long src_addr = ntohl(packet->iph->saddr);
unsigned long dst_addr = ntohl(packet->iph->daddr);
unsigned long src_addr_masked_22 = src_addr & 0xFFFFFC00; // */22
unsigned long dst_addr_masked_22 = dst_addr & 0xFFFFFC00; // */22
unsigned long src_addr_masked_24 = src_addr & 0xFFFFFF00; // */24
unsigned long dst_addr_masked_24 = dst_addr & 0xFFFFFF00; // */24
if( src_addr_masked_22 == 0x4E1F0800 /* 78.31.8.0 */
|| dst_addr_masked_22 == 0x4E1F0800 /* 78.31.8.0 */
/* **** */
|| src_addr_masked_22 == 0xC1EBE800 /* 193.235.232.0 */
|| dst_addr_masked_22 == 0xC1EBE800 /* 193.235.232.0 */
/* **** */
|| src_addr_masked_22 == 0xC284C400 /* 194.132.196.0 */
|| dst_addr_masked_22 == 0xC284C400 /* 194.132.196.0 */
/* **** */
|| src_addr_masked_24 == 0xC284A200 /* 194.132.162.0 */
|| dst_addr_masked_24 == 0xC284A200 /* 194.132.162.0 */
) {
NDPI_LOG_INFO(ndpi_struct, "found spotify via ip range\n");
ndpi_int_spotify_add_connection(ndpi_struct, flow, 0);
return;
}
}
}
}
NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
}
void ndpi_search_spotify(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow)
{
NDPI_LOG_DBG(ndpi_struct, "search spotify\n");
/* skip marked packets */
if (flow->detected_protocol_stack[0] != NDPI_PROTOCOL_SPOTIFY) {
ndpi_check_spotify(ndpi_struct, flow);
}
}
void init_spotify_dissector(struct ndpi_detection_module_struct *ndpi_struct, u_int32_t *id, NDPI_PROTOCOL_BITMASK *detection_bitmask)
{
ndpi_set_bitmask_protocol_detection("SPOTIFY", ndpi_struct, detection_bitmask, *id,
NDPI_PROTOCOL_SPOTIFY,
ndpi_search_spotify,
NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_TCP_OR_UDP_WITH_PAYLOAD_WITHOUT_RETRANSMISSION,
SAVE_DETECTION_BITMASK_AS_UNKNOWN,
ADD_TO_DETECTION_BITMASK);
*id += 1;
}
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