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/*
* json-rpc.c
*
* Copyright (C) 2023 - ntop.org
* Copyright (C) 2023 - V.G <v.gavrilov@securitycode.ru>
*
* 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_JSON_RPC
#include "ndpi_api.h"
#include "ndpi_private.h"
static void ndpi_search_json_rpc(struct ndpi_detection_module_struct *ndpi_struct,
struct ndpi_flow_struct *flow)
{
struct ndpi_packet_struct const * const packet = &ndpi_struct->packet;
NDPI_LOG_DBG(ndpi_struct, "search JSON-RPC\n");
if (flow->detected_protocol_stack[0] == NDPI_PROTOCOL_HTTP ||
flow->detected_protocol_stack[1] == NDPI_PROTOCOL_HTTP)
{
if ((packet->content_line.ptr != NULL) &&
(LINE_ENDS(packet->content_line, "application/json-rpc") != 0))
{
NDPI_LOG_INFO(ndpi_struct, "found JSON-RPC over HTTP\n");
ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_JSON_RPC,
NDPI_PROTOCOL_HTTP, NDPI_CONFIDENCE_DPI);
}
return;
}
if ((packet->payload_packet_len > 30) && (packet->payload[0] == '{') &&
(ndpi_strnstr((const char *)packet->payload, "\"jsonrpc\":", packet->payload_packet_len)))
{
NDPI_LOG_INFO(ndpi_struct, "found JSON-RPC over TCP\n");
ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_JSON_RPC,
NDPI_PROTOCOL_UNKNOWN, NDPI_CONFIDENCE_DPI);
return;
}
NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
}
void init_json_rpc_dissector(struct ndpi_detection_module_struct *ndpi_struct, u_int32_t *id)
{
ndpi_set_bitmask_protocol_detection("JSON-RPC", ndpi_struct, *id,
NDPI_PROTOCOL_JSON_RPC,
ndpi_search_json_rpc,
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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