diff options
Diffstat (limited to 'src/lib')
| -rw-r--r-- | src/lib/ndpi_main.c | 13 | ||||
| -rw-r--r-- | src/lib/protocols/natpmp.c | 126 |
2 files changed, 136 insertions, 3 deletions
diff --git a/src/lib/ndpi_main.c b/src/lib/ndpi_main.c index 7a01827ab..42b98fe45 100644 --- a/src/lib/ndpi_main.c +++ b/src/lib/ndpi_main.c @@ -1975,9 +1975,13 @@ static void ndpi_init_protocol_defaults(struct ndpi_detection_module_struct *ndp 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, 0 /* encrypted */, 0 /* nw proto */, NDPI_PROTOCOL_UNSAFE, NDPI_PROTOCOL_FTPS, - "FTPS", NDPI_PROTOCOL_CATEGORY_DOWNLOAD_FT, - ndpi_build_default_ports(ports_a, 0, 0, 0, 0, 0) /* TCP */, - ndpi_build_default_ports(ports_b, 0, 0, 0, 0, 0) /* UDP */); + "FTPS", NDPI_PROTOCOL_CATEGORY_DOWNLOAD_FT, + 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_NATPMP, + "NAT-PMP", NDPI_PROTOCOL_CATEGORY_NETWORK, + ndpi_build_default_ports(ports_a, 0, 0, 0, 0, 0) /* TCP */, + ndpi_build_default_ports(ports_b, 5351, 0, 0, 0, 0) /* UDP */); #ifdef CUSTOM_NDPI_PROTOCOLS #include "../../../nDPI-custom/custom_ndpi_main.c" @@ -4577,6 +4581,9 @@ static int ndpi_callback_init(struct ndpi_detection_module_struct *ndpi_str) { /* FastCGI */ init_fastcgi_dissector(ndpi_str, &a, detection_bitmask); + /* NATPMP */ + init_natpmp_dissector(ndpi_str, &a, detection_bitmask); + #ifdef CUSTOM_NDPI_PROTOCOLS #include "../../../nDPI-custom/custom_ndpi_main_init.c" #endif diff --git a/src/lib/protocols/natpmp.c b/src/lib/protocols/natpmp.c new file mode 100644 index 000000000..87b788bea --- /dev/null +++ b/src/lib/protocols/natpmp.c @@ -0,0 +1,126 @@ +/* + * natpmp.c + * + * Copyright (C) 2022 - ntop.org + * + * 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_NATPMP + +#include "ndpi_api.h" + +#define NATPMP_PORT 5351 + +enum natpmp_type { + NATPMP_REQUEST_ADDRESS = 0x00, + NATPMP_REQUEST_UDP_MAPPING = 0x01, + NATPMP_REQUEST_TCP_MAPPING = 0x02, + NATPMP_RESPONSE_ADRESS = 0x80, + NATPMP_RESPONSE_UDP_MAPPING = 0x81, + NATPMP_RESPONSE_TCP_MAPPING = 0x82 +}; + +static void ndpi_int_natpmp_add_connection(struct ndpi_detection_module_struct * const ndpi_struct, + struct ndpi_flow_struct * const flow) +{ + NDPI_LOG_INFO(ndpi_struct, "found nat-pmp\n"); + ndpi_set_detected_protocol(ndpi_struct, flow, + NDPI_PROTOCOL_NATPMP, + NDPI_PROTOCOL_UNKNOWN, + NDPI_CONFIDENCE_DPI); +} + +void ndpi_search_natpmp(struct ndpi_detection_module_struct *ndpi_struct, + struct ndpi_flow_struct *flow) +{ + struct ndpi_packet_struct const * const packet = &ndpi_struct->packet; + enum natpmp_type natpmp_type; + + NDPI_LOG_DBG(ndpi_struct, "search nat-pmp\n"); + + if (packet->payload_packet_len < 2 || packet->payload[0] != 0x00 /* Protocol version: 0x00 */) + { + NDPI_EXCLUDE_PROTO(ndpi_struct, flow); + return; + } + + natpmp_type = packet->payload[1]; + switch (natpmp_type) + { + case NATPMP_REQUEST_ADDRESS: + if (packet->payload_packet_len != 2) + { + NDPI_EXCLUDE_PROTO(ndpi_struct, flow); + } + return; + + case NATPMP_REQUEST_UDP_MAPPING: + case NATPMP_REQUEST_TCP_MAPPING: + if (packet->payload_packet_len != 12 || get_u_int16_t(packet->payload, 2) != 0x0000) + { + NDPI_EXCLUDE_PROTO(ndpi_struct, flow); + return; + } + break; + + case NATPMP_RESPONSE_ADRESS: + case NATPMP_RESPONSE_UDP_MAPPING: + case NATPMP_RESPONSE_TCP_MAPPING: + if ((natpmp_type == NATPMP_RESPONSE_ADRESS && packet->payload_packet_len != 12) || + (natpmp_type != NATPMP_RESPONSE_ADRESS && packet->payload_packet_len != 16)) + { + NDPI_EXCLUDE_PROTO(ndpi_struct, flow); + return; + } + + { + u_int16_t result_code = ntohs(get_u_int16_t(packet->payload, 2)); + if (result_code > 5) + { + NDPI_EXCLUDE_PROTO(ndpi_struct, flow); + return; + } + } + break; + + default: + NDPI_EXCLUDE_PROTO(ndpi_struct, flow); + return; + } + + if (flow->packet_counter > 2 || + ntohs(packet->udp->source) == NATPMP_PORT || ntohs(packet->udp->dest) == NATPMP_PORT) + { + ndpi_int_natpmp_add_connection(ndpi_struct, flow); + } +} + +void init_natpmp_dissector(struct ndpi_detection_module_struct *ndpi_struct, + u_int32_t *id, NDPI_PROTOCOL_BITMASK *detection_bitmask) +{ + ndpi_set_bitmask_protocol_detection("NAT-PMP", ndpi_struct, detection_bitmask, *id, + NDPI_PROTOCOL_NATPMP, + ndpi_search_natpmp, + NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_UDP_WITH_PAYLOAD, + SAVE_DETECTION_BITMASK_AS_UNKNOWN, + ADD_TO_DETECTION_BITMASK + ); + + *id += 1; +} |