-
Notifications
You must be signed in to change notification settings - Fork 896
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Merge pull request #6 from backer-and/dev
Added QUIC protocol
- Loading branch information
Showing
7 changed files
with
181 additions
and
4 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,156 @@ | ||
| /* | ||
| * quic.c | ||
| * | ||
| * Andrea Buscarinu - <andrea.buscarinu@gmail.com> | ||
| * Michele Campus - <michelecampus5@gmail.com> | ||
| * Copyright (C) 2012-15 - ntop.org | ||
| * | ||
| * This module 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. | ||
| * | ||
| * This module 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. | ||
| * If not, see <http://www.gnu.org/licenses/>. | ||
| * | ||
| */ | ||
|
|
||
|
|
||
| #include "ndpi_api.h" | ||
|
|
||
| #define QUIC_NO_V_RES_RSV 0xC3 // 1100 0011 | ||
|
|
||
| #define QUIC_CID_MASK 0x0C // 0000 1100 | ||
| #define QUIC_VER_MASK 0x01 // 0000 0001 | ||
| #define QUIC_SEQ_MASK 0x30 // 0011 0000 | ||
|
|
||
| #define CID_LEN_8 0x0C // 0000 1100 | ||
| #define CID_LEN_4 0x08 // 0000 1000 | ||
| #define CID_LEN_1 0x04 // 0000 0100 | ||
| #define CID_LEN_0 0x00 // 0000 0000 | ||
|
|
||
| #define SEQ_LEN_6 0x30 // 0011 0000 | ||
| #define SEQ_LEN_4 0x20 // 0010 0000 | ||
| #define SEQ_LEN_2 0x10 // 0001 0000 | ||
| #define SEQ_LEN_1 0x00 // 0000 0000 | ||
|
|
||
| #define SEQ_CONV(ARR) (ARR[0] | ARR[1] | ARR[2] | ARR[3] | ARR[4] | ARR[5] << 8) | ||
|
|
||
|
|
||
| #ifdef NDPI_PROTOCOL_QUIC | ||
| static void ndpi_int_quic_add_connection(struct ndpi_detection_module_struct | ||
| *ndpi_struct, struct ndpi_flow_struct *flow) | ||
| { | ||
| ndpi_int_add_connection(ndpi_struct, flow, NDPI_PROTOCOL_QUIC, NDPI_REAL_PROTOCOL); | ||
| } | ||
|
|
||
| int connect_id(const unsigned char pflags) | ||
| { | ||
| u_int cid_len; | ||
|
|
||
| // Check CID length. | ||
| switch (pflags & QUIC_CID_MASK) | ||
| { | ||
| case CID_LEN_8: cid_len = 8; break; | ||
| case CID_LEN_4: cid_len = 4; break; | ||
| case CID_LEN_1: cid_len = 1; break; | ||
| case CID_LEN_0: cid_len = 0; break; | ||
| default: | ||
| return -1; | ||
|
|
||
| } | ||
| // Return offset. | ||
| return cid_len + 1; | ||
| } | ||
|
|
||
| int sequence(const unsigned char *payload) | ||
| { | ||
| unsigned char conv[6] = {0}; | ||
| u_int seq_value = -1; | ||
| u_int seq_lens; | ||
| u_int cid_offs; | ||
| int i; | ||
|
|
||
| // Search SEQ bytes length. | ||
| switch (payload[0] & QUIC_SEQ_MASK) | ||
| { | ||
| case SEQ_LEN_6: seq_lens = 6; break; | ||
| case SEQ_LEN_4: seq_lens = 4; break; | ||
| case SEQ_LEN_2: seq_lens = 2; break; | ||
| case SEQ_LEN_1: seq_lens = 1; break; | ||
| default: | ||
| return -1; | ||
| } | ||
| // Retrieve SEQ offset. | ||
| cid_offs = connect_id(payload[0]); | ||
|
|
||
| if (cid_offs >= 0 && seq_lens > 0) | ||
| { | ||
| for (i = 0; i < seq_lens; i++) | ||
| conv[i] = payload[cid_offs + i]; | ||
|
|
||
| seq_value = SEQ_CONV(conv); | ||
| } | ||
| // Return SEQ dec value; | ||
| return seq_value; | ||
| } | ||
|
|
||
| void ndpi_search_quic(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow) | ||
| { | ||
| struct ndpi_packet_struct *packet = &flow->packet; | ||
| u_int ver_offs; | ||
|
|
||
| if(packet->udp != NULL) { | ||
| NDPI_LOG(NDPI_PROTOCOL_QUIC, ndpi_struct, NDPI_LOG_DEBUG, "calculating quic over udp.\n"); | ||
|
|
||
| // Settings without version. First check if PUBLIC FLAGS & SEQ bytes are 0x0. SEQ must be 1 at least. | ||
| if ((packet->payload[0] == 0x00 && packet->payload[1] != 0x00) || ((packet->payload[0] & QUIC_NO_V_RES_RSV) == 0)) | ||
| { | ||
| if (sequence(packet->payload) < 1) | ||
| { | ||
|
|
||
| NDPI_LOG(NDPI_PROTOCOL_QUIC, ndpi_struct, NDPI_LOG_DEBUG, "exclude quic.\n"); | ||
| NDPI_ADD_PROTOCOL_TO_BITMASK(flow->excluded_protocol_bitmask, NDPI_PROTOCOL_QUIC); | ||
| } | ||
|
|
||
| NDPI_LOG(NDPI_PROTOCOL_QUIC, ndpi_struct, NDPI_LOG_DEBUG, "found quic.\n"); | ||
| ndpi_int_quic_add_connection(ndpi_struct, flow); | ||
| } | ||
|
|
||
| // Check if version, than the CID length. | ||
| else if (packet->payload[0] & QUIC_VER_MASK) | ||
| { | ||
| // Skip CID length. | ||
| ver_offs = connect_id(packet->payload[0]); | ||
|
|
||
| if (ver_offs >= 0){ | ||
| unsigned char vers[] = {packet->payload[ver_offs], packet->payload[ver_offs + 1], | ||
| packet->payload[ver_offs + 2], packet->payload[ver_offs + 3]}; | ||
|
|
||
| // Version Match. | ||
| if (vers[0] == 'Q' && vers[1] == '0' && | ||
| (vers[2] == '2' && (vers[3] == '5' || vers[3] == '4' || vers[3] == '3' || vers[3] == '2' || | ||
| vers[3] == '1' || vers[3] == '0')) || | ||
| (vers[2] == '1' && (vers[3] == '9' || vers[3] == '8' || vers[3] == '7' || vers[3] == '6' || | ||
| vers[3] == '5' || vers[3] == '4' || vers[3] == '3' || vers[3] == '2' || | ||
| vers[3] == '1' || vers[3] == '0')) || | ||
| (vers[2] == '0' && vers[3] == '9')) | ||
|
|
||
| { | ||
| NDPI_LOG(NDPI_PROTOCOL_QUIC, ndpi_struct, NDPI_LOG_DEBUG, "found quic.\n"); | ||
| ndpi_int_quic_add_connection(ndpi_struct, flow); | ||
| } | ||
| } | ||
| } else | ||
| { | ||
| NDPI_LOG(NDPI_PROTOCOL_QUIC, ndpi_struct, NDPI_LOG_DEBUG, "exclude quic.\n"); | ||
| NDPI_ADD_PROTOCOL_TO_BITMASK(flow->excluded_protocol_bitmask, NDPI_PROTOCOL_QUIC); | ||
| } | ||
| } | ||
| } | ||
| #endif |