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Add The Elder Scrolls Online support (#2376)
* Add The Elder Scrolls Online support * Use ndpi_memmem instead of memmem from libc * Add protocol description * Change selection bitmask to V4_V6 * Update protocols.rst
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Original file line number | Diff line number | Diff line change |
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/* | ||
* teso.c | ||
* | ||
* The Elder Scrolls Online | ||
* | ||
* Copyright (C) 2024 - ntop.org | ||
* Copyright (C) 2024 - V.G <[email protected]> | ||
* | ||
* 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/>. | ||
* | ||
*/ | ||
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#include "ndpi_protocol_ids.h" | ||
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#define NDPI_CURRENT_PROTO NDPI_PROTOCOL_TESO | ||
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#include "ndpi_api.h" | ||
#include "ndpi_private.h" | ||
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static void ndpi_int_teso_add_connection(struct ndpi_detection_module_struct * const ndpi_struct, | ||
struct ndpi_flow_struct * const flow) | ||
{ | ||
NDPI_LOG_INFO(ndpi_struct, "found TES Online\n"); | ||
ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_TESO, | ||
NDPI_PROTOCOL_UNKNOWN, NDPI_CONFIDENCE_DPI); | ||
} | ||
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static void ndpi_search_teso(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_DBG(ndpi_struct, "search TES Online\n"); | ||
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if (packet->payload_packet_len < 600 || | ||
ntohl(get_u_int32_t(packet->payload, 0)) != (u_int32_t)(packet->payload_packet_len-4)) | ||
{ | ||
NDPI_EXCLUDE_PROTO(ndpi_struct, flow); | ||
return; | ||
} | ||
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/* | ||
* I'd like to use just memcmp and a couple ifs here, but the offset to | ||
* the string "eso.live" or the 0x8B789C01 byte sequence can be different - | ||
* it varies by the amount of characters in the account name, weather on Mars, | ||
* etc. | ||
*/ | ||
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const u_int8_t magic[] = { 0x8B, 0x78, 0x9C, 0x01 }; | ||
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if (ndpi_memmem(packet->payload, packet->payload_packet_len, "eso.live", | ||
NDPI_STATICSTRING_LEN("eso.live"))) | ||
{ | ||
ndpi_int_teso_add_connection(ndpi_struct, flow); | ||
return; | ||
} | ||
else if (ndpi_memmem(packet->payload, packet->payload_packet_len, magic, | ||
sizeof(magic))) | ||
{ | ||
ndpi_int_teso_add_connection(ndpi_struct, flow); | ||
return; | ||
} | ||
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NDPI_EXCLUDE_PROTO(ndpi_struct, flow); | ||
} | ||
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void init_teso_dissector(struct ndpi_detection_module_struct *ndpi_struct, u_int32_t *id) | ||
{ | ||
ndpi_set_bitmask_protocol_detection("TES_Online", ndpi_struct, *id, | ||
NDPI_PROTOCOL_TESO, | ||
ndpi_search_teso, | ||
NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_TCP_WITH_PAYLOAD_WITHOUT_RETRANSMISSION, | ||
SAVE_DETECTION_BITMASK_AS_UNKNOWN, | ||
ADD_TO_DETECTION_BITMASK); | ||
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*id += 1; | ||
} |
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