diff options
| author | Toni <matzeton@googlemail.com> | 2024-01-25 20:26:18 +0100 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2024-01-25 20:26:18 +0100 |
| commit | bcca89b78cdbc09d73987e5bdf728299f776c7a3 (patch) | |
| tree | 84a822e7f31bd18933d2699b84ad40a7760de6f5 /src/lib/protocols | |
| parent | 9a0affc6aa40960791f83ea0453c8c86d1b34f6e (diff) | |
Add Raft protocol dissector. (#2286)
Signed-off-by: Toni Uhlig <matzeton@googlemail.com>
Diffstat (limited to 'src/lib/protocols')
| -rw-r--r-- | src/lib/protocols/raft.c | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/src/lib/protocols/raft.c b/src/lib/protocols/raft.c new file mode 100644 index 000000000..6f0428561 --- /dev/null +++ b/src/lib/protocols/raft.c @@ -0,0 +1,111 @@ +/* + * raft.c + * + * Copyright (C) 2024 - ntop.org + * + * 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_RAFT +#include "ndpi_api.h" +#include "ndpi_private.h" + +PACK_ON +struct raft_header { + uint64_t msg_type; + uint64_t msg_length; +} PACK_OFF; + +enum raft_header_type { + RAFT_IO_APPEND_ENTRIES = 1, + RAFT_IO_APPEND_ENTRIES_RESULT, + RAFT_IO_REQUEST_VOTE, + RAFT_IO_REQUEST_VOTE_RESULT, + RAFT_IO_INSTALL_SNAPSHOT, + RAFT_IO_TIMEOUT_NOW +}; + +static void ndpi_int_raft_add_connection(struct ndpi_detection_module_struct *ndpi_struct, + struct ndpi_flow_struct *flow) +{ + NDPI_LOG_INFO(ndpi_struct, "found raft\n"); + ndpi_set_detected_protocol(ndpi_struct, flow, + NDPI_PROTOCOL_RAFT, + NDPI_PROTOCOL_UNKNOWN, + NDPI_CONFIDENCE_DPI); +} + +static void ndpi_search_raft(struct ndpi_detection_module_struct *ndpi_struct, + struct ndpi_flow_struct *flow) +{ + struct ndpi_packet_struct const * const packet = &ndpi_struct->packet; + struct raft_header const * const raft_header = (struct raft_header *)packet->payload; + + NDPI_LOG_DBG(ndpi_struct, "search raft\n"); + + if (packet->payload_packet_len < sizeof(*raft_header)) + { + NDPI_EXCLUDE_PROTO(ndpi_struct, flow); + return; + } + + uint64_t msg_type = le64toh(raft_header->msg_type); + switch (msg_type) + { + case RAFT_IO_APPEND_ENTRIES: + case RAFT_IO_APPEND_ENTRIES_RESULT: + case RAFT_IO_REQUEST_VOTE: + case RAFT_IO_REQUEST_VOTE_RESULT: + case RAFT_IO_INSTALL_SNAPSHOT: + case RAFT_IO_TIMEOUT_NOW: + break; + + default: + NDPI_EXCLUDE_PROTO(ndpi_struct, flow); + return; + } + + uint64_t msg_length = le64toh(raft_header->msg_length); + if (msg_length == packet->payload_packet_len - sizeof(*raft_header)) + { + ndpi_int_raft_add_connection(ndpi_struct, flow); + return; + } + + if (flow->packet_counter < 3) + { + return; + } + + ndpi_int_raft_add_connection(ndpi_struct, flow); +} + +void init_raft_dissector(struct ndpi_detection_module_struct *ndpi_struct, + u_int32_t *id) +{ + ndpi_set_bitmask_protocol_detection("Raft", ndpi_struct, *id, + NDPI_PROTOCOL_RAFT, + ndpi_search_raft, + NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_TCP_WITH_PAYLOAD_WITHOUT_RETRANSMISSION, + SAVE_DETECTION_BITMASK_AS_UNKNOWN, + ADD_TO_DETECTION_BITMASK); + + *id += 1; +} + |