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| 1 | +/* |
| 2 | + * openflow.c |
| 3 | + * |
| 4 | + * Copyright (C) 2023 - ntop.org |
| 5 | + * Copyright (C) 2023 - V.G <jacendi@protonmail.com> |
| 6 | + * |
| 7 | + * This file is part of nDPI, an open source deep packet inspection |
| 8 | + * library based on the OpenDPI and PACE technology by ipoque GmbH |
| 9 | + * |
| 10 | + * nDPI is free software: you can redistribute it and/or modify |
| 11 | + * it under the terms of the GNU Lesser General Public License as published by |
| 12 | + * the Free Software Foundation, either version 3 of the License, or |
| 13 | + * (at your option) any later version. |
| 14 | + * |
| 15 | + * nDPI is distributed in the hope that it will be useful, |
| 16 | + * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | + * GNU Lesser General Public License for more details. |
| 19 | + * |
| 20 | + * You should have received a copy of the GNU Lesser General Public License |
| 21 | + * along with nDPI. If not, see <http://www.gnu.org/licenses/>. |
| 22 | + * |
| 23 | + */ |
| 24 | + |
| 25 | +#include "ndpi_protocol_ids.h" |
| 26 | + |
| 27 | +#define NDPI_CURRENT_PROTO NDPI_PROTOCOL_OPENFLOW |
| 28 | + |
| 29 | +#include "ndpi_api.h" |
| 30 | +#include "ndpi_private.h" |
| 31 | + |
| 32 | +static void ndpi_int_openflow_add_connection(struct ndpi_detection_module_struct *ndpi_struct, |
| 33 | + struct ndpi_flow_struct *flow) |
| 34 | +{ |
| 35 | + NDPI_LOG_INFO(ndpi_struct, "found OpenFlow\n"); |
| 36 | + ndpi_set_detected_protocol(ndpi_struct, flow, |
| 37 | + NDPI_PROTOCOL_OPENFLOW, NDPI_PROTOCOL_UNKNOWN, |
| 38 | + NDPI_CONFIDENCE_DPI); |
| 39 | +} |
| 40 | + |
| 41 | +static void ndpi_search_openflow(struct ndpi_detection_module_struct *ndpi_struct, |
| 42 | + struct ndpi_flow_struct *flow) |
| 43 | +{ |
| 44 | + struct ndpi_packet_struct const * const packet = &ndpi_struct->packet; |
| 45 | + |
| 46 | + NDPI_LOG_DBG(ndpi_struct, "search OpenFlow\n"); |
| 47 | + |
| 48 | + if (packet->payload_packet_len >= 8 && |
| 49 | + packet->payload[0] == 0x06 && packet->payload[1] < 36 && |
| 50 | + packet->payload_packet_len == ntohs(get_u_int16_t(packet->payload, 2))) |
| 51 | + { |
| 52 | + ndpi_int_openflow_add_connection(ndpi_struct, flow); |
| 53 | + return; |
| 54 | + } |
| 55 | + |
| 56 | + NDPI_EXCLUDE_PROTO(ndpi_struct, flow); |
| 57 | +} |
| 58 | + |
| 59 | +void init_openflow_dissector(struct ndpi_detection_module_struct *ndpi_struct, u_int32_t *id) |
| 60 | +{ |
| 61 | + ndpi_set_bitmask_protocol_detection("OpenFlow", ndpi_struct, *id, |
| 62 | + NDPI_PROTOCOL_OPENFLOW, |
| 63 | + ndpi_search_openflow, |
| 64 | + NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_TCP_WITH_PAYLOAD_WITHOUT_RETRANSMISSION, |
| 65 | + SAVE_DETECTION_BITMASK_AS_UNKNOWN, |
| 66 | + ADD_TO_DETECTION_BITMASK); |
| 67 | + |
| 68 | + *id += 1; |
| 69 | +} |
| 70 | + |
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