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/*
* tivoconnect.c
*
* Copyright (C) 2022-23 - 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_TIVOCONNECT
#include "ndpi_api.h"
#include "ndpi_private.h"
static void ndpi_int_tivoconnect_add_connection(struct ndpi_detection_module_struct * const ndpi_struct,
struct ndpi_flow_struct * const flow)
{
NDPI_LOG_INFO(ndpi_struct, "found tivoconnect\n");
ndpi_set_detected_protocol(ndpi_struct, flow,
NDPI_PROTOCOL_TIVOCONNECT,
NDPI_PROTOCOL_UNKNOWN,
NDPI_CONFIDENCE_DPI);
}
static void dissect_tivoconnect_data(struct ndpi_detection_module_struct *ndpi_struct,
struct ndpi_flow_struct *flow)
{
struct ndpi_packet_struct const * const packet = &ndpi_struct->packet;
char const * const payload = (char const *)packet->payload;
size_t const payload_len = packet->payload_packet_len;
char const *key = payload;
char const *newline;
for (newline = ndpi_strnstr(payload, "\n", payload_len);
newline != NULL;
key = ++newline,
newline = ndpi_strnstr(newline, "\n", payload_len - (newline - payload)))
{
size_t const line_len = newline - key;
char const *value = ndpi_strnstr(key, "=", line_len);
if (value == NULL)
{
ndpi_set_risk(ndpi_struct, flow, NDPI_MALFORMED_PACKET, "Missing value type in TiViConnect beacon");
continue;
}
value++;
size_t const key_len = value - 1 - key;
size_t const value_len = newline - value;
if (key_len == NDPI_STATICSTRING_LEN("identity") &&
strncasecmp(key, "identity", key_len) == 0)
{
if (value_len >= NDPI_STATICSTRING_LEN("uuid:") &&
strncasecmp(value, "uuid:", NDPI_STATICSTRING_LEN("uuid:")) == 0)
{
size_t const len = ndpi_min(sizeof(flow->protos.tivoconnect.identity_uuid) - 1,
value_len - NDPI_STATICSTRING_LEN("uuid:"));
strncpy(flow->protos.tivoconnect.identity_uuid,
value + NDPI_STATICSTRING_LEN("uuid:"), len);
flow->protos.tivoconnect.identity_uuid[len] = '\0';
}
continue;
}
if (key_len == NDPI_STATICSTRING_LEN("machine") &&
strncasecmp(key, "machine", key_len) == 0)
{
size_t const len = ndpi_min(sizeof(flow->protos.tivoconnect.machine) - 1,
value_len);
strncpy(flow->protos.tivoconnect.machine, value, len);
flow->protos.tivoconnect.machine[len] = '\0';
continue;
}
if (key_len == NDPI_STATICSTRING_LEN("platform") &&
strncasecmp(key, "platform", key_len) == 0)
{
size_t const len = ndpi_min(sizeof(flow->protos.tivoconnect.platform) - 1,
value_len);
strncpy(flow->protos.tivoconnect.platform, value, len);
flow->protos.tivoconnect.platform[len] = '\0';
continue;
}
if (key_len == NDPI_STATICSTRING_LEN("services") &&
strncasecmp(key, "services", key_len) == 0)
{
size_t const len = ndpi_min(sizeof(flow->protos.tivoconnect.services) - 1,
value_len);
strncpy(flow->protos.tivoconnect.services, value, len);
flow->protos.tivoconnect.services[len] = '\0';
continue;
}
}
if ((size_t)(key - payload) != payload_len)
{
ndpi_set_risk(ndpi_struct, flow, NDPI_MALFORMED_PACKET,
"TiViConnect beacon malformed packet");
}
}
static void ndpi_search_tivoconnect(struct ndpi_detection_module_struct *ndpi_struct,
struct ndpi_flow_struct *flow)
{
struct ndpi_packet_struct const * const packet = &ndpi_struct->packet;
NDPI_LOG_INFO(ndpi_struct, "search tivoconnect\n");
if (packet->payload_packet_len >= NDPI_STATICSTRING_LEN("tivoconnect=") &&
strncasecmp((char const *)packet->payload,
"tivoconnect=", NDPI_STATICSTRING_LEN("tivoconnect=")) == 0)
{
ndpi_int_tivoconnect_add_connection(ndpi_struct, flow);
} else {
NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
return;
}
dissect_tivoconnect_data(ndpi_struct, flow);
}
void init_tivoconnect_dissector(struct ndpi_detection_module_struct *ndpi_struct,
u_int32_t *id)
{
ndpi_set_bitmask_protocol_detection("TiVoConnect", ndpi_struct, *id,
NDPI_PROTOCOL_TIVOCONNECT,
ndpi_search_tivoconnect,
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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