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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,139 @@ | ||
| /* | ||
| * roughtime.c | ||
| * | ||
| * Copyright (C) 2024 - 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_ROUGHTIME | ||
|
|
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| #include "ndpi_api.h" | ||
| #include "ndpi_private.h" | ||
|
|
||
| static u_int32_t const valid_tags[] = { | ||
| 0x00444150 /* PAD */, | ||
| 0x00474953 /* SIG */, | ||
| 0x00524556 /* VER */, | ||
| 0x31545544 /* DUT1 */, | ||
| 0x434e4f4e /* NONC */, | ||
| 0x454c4544 /* DELE */, | ||
| 0x48544150 /* PATH */, | ||
| 0x49415444 /* DTAI */, | ||
| 0x49444152 /* RADI */, | ||
| 0x4b425550 /* PUBK */, | ||
| 0x5041454c /* LEAP */, | ||
| 0x5044494d /* MIDP */, | ||
| 0x50455253 /* SREP */, | ||
| 0x544e494d /* MINT */, | ||
| 0x544f4f52 /* ROOT */, | ||
| 0x54524543 /* CERT */, | ||
| 0x5458414d /* MAXT */, | ||
| 0x58444e49 /* INDX */, | ||
| /* | ||
| * It seems that some implementations are not following the specs | ||
| * by using 0xFF instead of 0x00 as ASCII NUL. | ||
| */ | ||
| 0xFF444150 /* PAD */, | ||
| 0xFF474953 /* SIG */, | ||
| 0xFF524556 /* VER */, | ||
| /* | ||
| * Newer drafts may have the following additional tag. | ||
| */ | ||
| 0x7a7a7a7a /* ZZZZ */, | ||
| }; | ||
|
|
||
| static void ndpi_int_roughtime_add_connection(struct ndpi_detection_module_struct * const ndpi_struct, | ||
| struct ndpi_flow_struct * const flow) | ||
| { | ||
| NDPI_LOG_INFO(ndpi_struct, "found roughtime\n"); | ||
| ndpi_set_detected_protocol(ndpi_struct, flow, | ||
| NDPI_PROTOCOL_ROUGHTIME, | ||
| NDPI_PROTOCOL_UNKNOWN, | ||
| NDPI_CONFIDENCE_DPI); | ||
| } | ||
|
|
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| static void ndpi_search_roughtime(struct ndpi_detection_module_struct *ndpi_struct, | ||
| struct ndpi_flow_struct *flow) | ||
| { | ||
| struct ndpi_packet_struct const * const packet = &ndpi_struct->packet; | ||
|
|
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| NDPI_LOG_INFO(ndpi_struct, "search roughtime\n"); | ||
|
|
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| if (packet->payload_packet_len < 4) | ||
| { | ||
| NDPI_EXCLUDE_PROTO(ndpi_struct, flow); | ||
| return; | ||
| } | ||
|
|
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| u_int32_t number_of_tags = le32toh(get_u_int32_t(packet->payload, 0)); | ||
| size_t const minimum_length = 4 /* number of tags (N) */ + | ||
| (number_of_tags - 1) * 4 /* number of tag offsets (N-1) */ + | ||
| (number_of_tags * 4) /* tags itself (N) */; | ||
| if (number_of_tags < 1 || packet->payload_packet_len < minimum_length || | ||
| number_of_tags > NDPI_ARRAY_LENGTH(valid_tags)) | ||
| { | ||
| NDPI_EXCLUDE_PROTO(ndpi_struct, flow); | ||
| return; | ||
| } | ||
|
|
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| if (number_of_tags > 1) { | ||
| u_int32_t tag_offset = le32toh(get_u_int32_t(packet->payload, 4 + (number_of_tags - 2) * 4)); | ||
| if (packet->payload_packet_len < 4 + (number_of_tags - 1) * 4 + tag_offset) | ||
| { | ||
| NDPI_EXCLUDE_PROTO(ndpi_struct, flow); | ||
| return; | ||
| } | ||
| } | ||
|
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| size_t i; | ||
| for (i = 0; i < number_of_tags; ++i) | ||
| { | ||
| u_int32_t tag = le32toh(get_u_int32_t(packet->payload, 4 + (number_of_tags - 1) * 4 + i * 4)); | ||
|
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| size_t j; | ||
| for (j = 0; j < NDPI_ARRAY_LENGTH(valid_tags); ++j) | ||
| { | ||
| if (tag == valid_tags[j]) | ||
| { | ||
| break; | ||
| } | ||
| } | ||
| if (j == NDPI_ARRAY_LENGTH(valid_tags)) | ||
| { | ||
| NDPI_EXCLUDE_PROTO(ndpi_struct, flow); | ||
| return; | ||
| } | ||
| } | ||
|
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| ndpi_int_roughtime_add_connection(ndpi_struct, flow); | ||
| } | ||
|
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| void init_roughtime_dissector(struct ndpi_detection_module_struct *ndpi_struct, | ||
| u_int32_t *id) | ||
| { | ||
| ndpi_set_bitmask_protocol_detection("Roughtime", ndpi_struct, *id, | ||
| NDPI_PROTOCOL_ROUGHTIME, | ||
| ndpi_search_roughtime, | ||
| NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_TCP_OR_UDP_WITH_PAYLOAD_WITHOUT_RETRANSMISSION, | ||
| SAVE_DETECTION_BITMASK_AS_UNKNOWN, | ||
| ADD_TO_DETECTION_BITMASK | ||
| ); | ||
|
|
||
| *id += 1; | ||
| } |
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2 changes: 1 addition & 1 deletion
2
tests/cfgs/default/result/FAX-Call-t38-CA-TDM-SIP-FB-1.pcap.out
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