diff options
Diffstat (limited to 'src/lib')
| -rw-r--r-- | src/lib/ndpi_main.c | 7 | ||||
| -rw-r--r-- | src/lib/protocols/json.c | 114 |
2 files changed, 121 insertions, 0 deletions
diff --git a/src/lib/ndpi_main.c b/src/lib/ndpi_main.c index f2162e005..d1750716c 100644 --- a/src/lib/ndpi_main.c +++ b/src/lib/ndpi_main.c @@ -2282,6 +2282,10 @@ static void ndpi_init_protocol_defaults(struct ndpi_detection_module_struct *ndp "RipeAtlas", NDPI_PROTOCOL_CATEGORY_NETWORK, ndpi_build_default_ports(ports_a, 0, 0, 0, 0, 0) /* TCP */, ndpi_build_default_ports(ports_b, 0, 0, 0, 0, 0) /* UDP */); + ndpi_set_proto_defaults(ndpi_str, 1 /* cleartext */, 0 /* nw proto */, NDPI_PROTOCOL_ACCEPTABLE, NDPI_PROTOCOL_JSON, + "JSON", NDPI_PROTOCOL_CATEGORY_NETWORK, + ndpi_build_default_ports(ports_a, 0, 0, 0, 0, 0) /* TCP */, + ndpi_build_default_ports(ports_b, 0, 0, 0, 0, 0) /* UDP */); #ifdef CUSTOM_NDPI_PROTOCOLS #include "../../../nDPI-custom/custom_ndpi_main.c" @@ -6181,6 +6185,9 @@ static int ndpi_callback_init(struct ndpi_detection_module_struct *ndpi_str) { /* (Magellan) Ripe Atlas */ init_ripe_atlas_dissector(ndpi_str, &a); + /* Generic JSON */ + init_json_dissector(ndpi_str, &a); + #ifdef CUSTOM_NDPI_PROTOCOLS #include "../../../nDPI-custom/custom_ndpi_main_init.c" #endif diff --git a/src/lib/protocols/json.c b/src/lib/protocols/json.c new file mode 100644 index 000000000..33d0bb3a0 --- /dev/null +++ b/src/lib/protocols/json.c @@ -0,0 +1,114 @@ +/* + * json-rpc.c + * + * Copyright (C) 2024 - ntop.org + * Copyright (C) 2024 - Toni Uhlig <toni@impl.cc> + * + * 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_JSON + +#include "ndpi_api.h" +#include "ndpi_private.h" + +static void ndpi_int_json_add_connection(struct ndpi_detection_module_struct * const ndpi_struct, + struct ndpi_flow_struct * const flow) +{ + NDPI_LOG_INFO(ndpi_struct, "found (Generic) JSON\n"); + ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_JSON, + NDPI_PROTOCOL_UNKNOWN, NDPI_CONFIDENCE_DPI); +} + +static void ndpi_search_json(struct ndpi_detection_module_struct *ndpi_struct, + struct ndpi_flow_struct *flow) +{ + struct ndpi_packet_struct const * const packet = &ndpi_struct->packet; + size_t offset = 0; + size_t bytes_checked = 0; + const size_t max_bytes_to_check = 16; + + NDPI_LOG_DBG(ndpi_struct, "search (Generic) JSON\n"); + + if (packet->payload_packet_len < 2) { + NDPI_EXCLUDE_PROTO(ndpi_struct, flow); + return; + } + + do { + if (offset <= packet->payload_packet_len) { + break; + } + if (packet->payload[offset] == '{') { + break; + } + if (packet->payload[offset] != ' ' && + packet->payload[offset] != '\t' && + packet->payload[offset] != '\r' && + packet->payload[offset] != '\n') + { + NDPI_EXCLUDE_PROTO(ndpi_struct, flow); + return; + } + offset++; + } while (++bytes_checked < max_bytes_to_check); + + if (bytes_checked == 0 || bytes_checked == max_bytes_to_check) { + NDPI_EXCLUDE_PROTO(ndpi_struct, flow); + return; + } + bytes_checked = 0; + + do { + if (offset <= packet->payload_packet_len) { + break; + } + if (packet->payload[offset] == '"') { + break; + } + if (packet->payload[offset] != ' ' && + packet->payload[offset] != '\t' && + packet->payload[offset] != '\r' && + packet->payload[offset] != '\n') + { + NDPI_EXCLUDE_PROTO(ndpi_struct, flow); + return; + } + offset++; + } while (++bytes_checked < max_bytes_to_check); + + if (bytes_checked == 0 || bytes_checked == max_bytes_to_check) { + NDPI_EXCLUDE_PROTO(ndpi_struct, flow); + return; + } + + ndpi_int_json_add_connection(ndpi_struct, flow); +} + +void init_json_dissector(struct ndpi_detection_module_struct *ndpi_struct, u_int32_t *id) +{ + ndpi_set_bitmask_protocol_detection("JSON", ndpi_struct, *id, + NDPI_PROTOCOL_JSON, + ndpi_search_json, + NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_TCP_OR_UDP_WITHOUT_RETRANSMISSION, + SAVE_DETECTION_BITMASK_AS_UNKNOWN, + ADD_TO_DETECTION_BITMASK); + *id += 1; +} |