diff options
Diffstat (limited to 'src/lib/protocols/ldp.c')
| -rw-r--r-- | src/lib/protocols/ldp.c | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/src/lib/protocols/ldp.c b/src/lib/protocols/ldp.c new file mode 100644 index 000000000..5070a91bc --- /dev/null +++ b/src/lib/protocols/ldp.c @@ -0,0 +1,127 @@ +/* + * ldp.c + * + * Label Distribution Protocol + * + * Copyright (C) 2024 - ntop.org + * Copyright (C) 2024 - V.G <jacendi@protonmail.com> + * + * 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_LDP + +#include "ndpi_api.h" +#include "ndpi_private.h" + +enum ldp_message_types +{ + LDP_INITIALIZATION = 0x0200, + LDP_KEEPALIVE = 0x0201, + LDP_CAPABILITY = 0x0202, + LDP_ADDRESS = 0x0300, + LDP_ADDRESS_WITHDRAWAL = 0x0301, + LDP_LABEL_MAPPING = 0x0400, + LDP_LABEL_REQUEST = 0x0401, + LDP_LABEL_WITHDRAWAL = 0x0402, + LDP_LABEL_RELEASE = 0x0403, + LDP_LABEL_ABORT_REQUEST = 0x0404, + LDP_CALL_SETUP = 0x0500, + LDP_CALL_RELEASE = 0x0501, + LDP_RG_CONNECT_MESSAGE = 0x0700, + LDP_RG_DISCONNECT_MESSAGE = 0x0701, + LDP_RG_NOTIFICATION_MESSAGE = 0x0702, + LDP_RG_APPLICATION_DATA_MESSAGE = 0x0703 +}; + +static void ndpi_int_ldp_add_connection(struct ndpi_detection_module_struct *ndpi_struct, + struct ndpi_flow_struct *flow) +{ + NDPI_LOG_INFO(ndpi_struct, "found LDP\n"); + ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_LDP, + NDPI_PROTOCOL_UNKNOWN, NDPI_CONFIDENCE_DPI); +} + +static void ndpi_search_ldp(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 LDP\n"); + + if (packet->payload_packet_len > 19 && + ntohs(get_u_int16_t(packet->payload, 0)) == 1 && + ntohs(get_u_int16_t(packet->payload, 2)) == (u_int16_t)(packet->payload_packet_len-4)) + { + /* LDP Hello Message */ + if (packet->udp != NULL && + ntohs(get_u_int16_t(packet->payload, 10)) == 0x0100) + { + ndpi_int_ldp_add_connection(ndpi_struct, flow); + return; + } + else if (packet->tcp != NULL) { + u_int16_t ldp_msg_type = ntohs(get_u_int16_t(packet->payload, 10)); + + /* Vendor defined message types */ + if (ldp_msg_type >= 0x3E00 && ldp_msg_type <= 0x3EFF) { + ndpi_int_ldp_add_connection(ndpi_struct, flow); + return; + } + + switch (ldp_msg_type) { + case LDP_INITIALIZATION: + case LDP_KEEPALIVE: + case LDP_CAPABILITY: + case LDP_ADDRESS: + case LDP_ADDRESS_WITHDRAWAL: + case LDP_LABEL_MAPPING: + case LDP_LABEL_REQUEST: + case LDP_LABEL_WITHDRAWAL: + case LDP_LABEL_RELEASE: + case LDP_LABEL_ABORT_REQUEST: + case LDP_CALL_SETUP: + case LDP_CALL_RELEASE: + case LDP_RG_CONNECT_MESSAGE: + case LDP_RG_DISCONNECT_MESSAGE: + case LDP_RG_NOTIFICATION_MESSAGE: + case LDP_RG_APPLICATION_DATA_MESSAGE: + ndpi_int_ldp_add_connection(ndpi_struct, flow); + return; + default: + break; + } + } + } + + NDPI_EXCLUDE_PROTO(ndpi_struct, flow); +} + +void init_ldp_dissector(struct ndpi_detection_module_struct *ndpi_struct, u_int32_t *id) +{ + ndpi_set_bitmask_protocol_detection("LDP", ndpi_struct, *id, + NDPI_PROTOCOL_LDP, + ndpi_search_ldp, + NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_TCP_OR_UDP_WITH_PAYLOAD_WITHOUT_RETRANSMISSION, + SAVE_DETECTION_BITMASK_AS_UNKNOWN, + ADD_TO_DETECTION_BITMASK); + + *id += 1; +} |