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Add PROFINET/IO protocol dissector (#2213)
* Add PROFINET/IO protocol dissector * Add LE (Little Endian) to the file name * Rework dissector * Remove redundant check
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,89 @@ | ||
| /* | ||
| * profinet_io.c | ||
| * | ||
| * Copyright (C) 2023 - ntop.org | ||
| * Copyright (C) 2023 - V.G <[email protected]> | ||
| * | ||
| * 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/>. | ||
| * | ||
| */ | ||
|
|
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| #include "ndpi_protocol_ids.h" | ||
|
|
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| #define NDPI_CURRENT_PROTO NDPI_PROTOCOL_PROFINET_IO | ||
|
|
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| #include "ndpi_api.h" | ||
| #include "ndpi_private.h" | ||
|
|
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| static void ndpi_int_profinet_io_add_connection(struct ndpi_detection_module_struct *ndpi_struct, | ||
| struct ndpi_flow_struct *flow) | ||
| { | ||
| NDPI_LOG_INFO(ndpi_struct, "found PROFINET/IO\n"); | ||
| ndpi_set_detected_protocol(ndpi_struct, flow, | ||
| NDPI_PROTOCOL_PROFINET_IO, NDPI_PROTOCOL_DCERPC, | ||
| NDPI_CONFIDENCE_DPI); | ||
| } | ||
|
|
||
| static void ndpi_search_profinet_io(struct ndpi_detection_module_struct *ndpi_struct, | ||
| struct ndpi_flow_struct *flow) | ||
| { | ||
| struct ndpi_packet_struct const * const packet = &ndpi_struct->packet; | ||
|
|
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| NDPI_LOG_DBG(ndpi_struct, "searching PROFINET/IO\n"); | ||
|
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| /* PROFINET/IO is based on connectionless DCE/RPC */ | ||
| if ((flow->detected_protocol_stack[0] == NDPI_PROTOCOL_DCERPC) && | ||
| (packet->payload_packet_len > 43)) | ||
| { | ||
| u_int8_t byte_order = (packet->payload[4] >> 4) & 0xF; | ||
| u_int32_t time_low = 0; | ||
| u_int16_t time_mid = 0; | ||
| u_int16_t time_hi_and_version = 0; | ||
|
|
||
| if (byte_order == 0) { /* Big Endian */ | ||
| time_low = ntohl(get_u_int32_t(packet->payload, 8)); | ||
| time_mid = ntohs(get_u_int16_t(packet->payload, 12)); | ||
| time_hi_and_version = ntohs(get_u_int16_t(packet->payload, 14)); | ||
| } else { /* Little Endian */ | ||
| time_low = le32toh(get_u_int32_t(packet->payload, 8)); | ||
| time_mid = le16toh(get_u_int16_t(packet->payload, 12)); | ||
| time_hi_and_version = le16toh(get_u_int16_t(packet->payload, 14)); | ||
| } | ||
|
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||
| if ((time_low == 0xDEA00000) && (time_mid == 0x6C97) && | ||
| (time_hi_and_version == 0x11D1)) | ||
| { | ||
| ndpi_int_profinet_io_add_connection(ndpi_struct, flow); | ||
| return; | ||
| } | ||
| } | ||
|
|
||
| NDPI_EXCLUDE_PROTO(ndpi_struct, flow); | ||
| } | ||
|
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| void init_profinet_io_dissector(struct ndpi_detection_module_struct *ndpi_struct, u_int32_t *id) | ||
| { | ||
| ndpi_set_bitmask_protocol_detection("PROFINET_IO", ndpi_struct, *id, | ||
| NDPI_PROTOCOL_PROFINET_IO, | ||
| ndpi_search_profinet_io, | ||
| NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_UDP_WITH_PAYLOAD, | ||
| SAVE_DETECTION_BITMASK_AS_UNKNOWN, | ||
| ADD_TO_DETECTION_BITMASK | ||
| ); | ||
|
|
||
| *id += 1; | ||
| } |
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2 changes: 1 addition & 1 deletion
2
tests/cfgs/default/result/FAX-Call-t38-CA-TDM-SIP-FB-1.pcap.out
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