From 6cb16311324c3af7acb8edc0d4d0243642c95d25 Mon Sep 17 00:00:00 2001 From: Vladimir Gavrilov <105977161+0xA50C1A1@users.noreply.github.com> Date: Mon, 7 Oct 2024 16:45:51 +0300 Subject: Add DingTalk protocol support (#2581) --- src/lib/protocols/dingtalk.c | 63 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 63 insertions(+) create mode 100644 src/lib/protocols/dingtalk.c (limited to 'src/lib/protocols') diff --git a/src/lib/protocols/dingtalk.c b/src/lib/protocols/dingtalk.c new file mode 100644 index 000000000..25aea3f99 --- /dev/null +++ b/src/lib/protocols/dingtalk.c @@ -0,0 +1,63 @@ +/* + * dingtalk.c + * + * Copyright (C) 2024 - ntop.org + * Copyright (C) 2024 - V.G + * + * 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 . + * + */ + +#include "ndpi_protocol_ids.h" + +#define NDPI_CURRENT_PROTO NDPI_PROTOCOL_DINGTALK + +#include "ndpi_api.h" +#include "ndpi_private.h" + +static void ndpi_search_dingtalk(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 DingTalk\n"); + + if (packet->payload_packet_len > 90 && packet->payload[0] == 0x10) + { + if (ntohl(get_u_int32_t(packet->payload, 2)) == 0x87800100 && + ntohl(get_u_int32_t(packet->payload, 6)) == 0x1000200 && + ntohl(get_u_int32_t(packet->payload, 10)) == 0x2646B03 && ntohs(get_u_int16_t(packet->payload, 14)) == 0x20) + { + NDPI_LOG_INFO(ndpi_struct, "found DingTalk\n"); + ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_DINGTALK, + NDPI_PROTOCOL_UNKNOWN, NDPI_CONFIDENCE_DPI); + return; + } + } + + NDPI_EXCLUDE_PROTO(ndpi_struct, flow); +} + +void init_dingtalk_dissector(struct ndpi_detection_module_struct *ndpi_struct, u_int32_t *id) +{ + ndpi_set_bitmask_protocol_detection("DingTalk", ndpi_struct, *id, + NDPI_PROTOCOL_DINGTALK, + ndpi_search_dingtalk, + NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_TCP_WITH_PAYLOAD_WITHOUT_RETRANSMISSION, + SAVE_DETECTION_BITMASK_AS_UNKNOWN, + ADD_TO_DETECTION_BITMASK); + *id += 1; +} -- cgit v1.2.3