| 1 |
|
%% Copyright (c) 2015 Peter Morgan <peter.james.morgan@gmail.com> |
| 2 |
|
%% |
| 3 |
|
%% Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 |
|
%% you may not use this file except in compliance with the License. |
| 5 |
|
%% You may obtain a copy of the License at |
| 6 |
|
%% |
| 7 |
|
%% http://www.apache.org/licenses/LICENSE-2.0 |
| 8 |
|
%% |
| 9 |
|
%% Unless required by applicable law or agreed to in writing, software |
| 10 |
|
%% distributed under the License is distributed on an "AS IS" BASIS, |
| 11 |
|
%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 |
|
%% See the License for the specific language governing permissions and |
| 13 |
|
%% limitations under the License. |
| 14 |
|
|
| 15 |
|
-module(pcapng_ip_tcp). |
| 16 |
|
-export([decode/1]). |
| 17 |
|
|
| 18 |
|
|
| 19 |
|
decode(<< |
| 20 |
|
Source:16, |
| 21 |
|
Destination:16, |
| 22 |
|
Sequence:32, |
| 23 |
|
Acknowledgement:32, |
| 24 |
|
DataOffset:4, |
| 25 |
|
0:3, |
| 26 |
|
NS:1, |
| 27 |
|
CWR:1, |
| 28 |
|
ECE:1, |
| 29 |
|
URG:1, |
| 30 |
|
ACK:1, |
| 31 |
|
PSH:1, |
| 32 |
|
RST:1, |
| 33 |
|
SYN:1, |
| 34 |
|
FIN:1, |
| 35 |
|
WindowSize:16, |
| 36 |
|
Checksum:16, |
| 37 |
|
_/binary |
| 38 |
|
>> = Packet) -> |
| 39 |
821 |
<<_:DataOffset/unit:32, Data/bytes>> = Packet, |
| 40 |
|
|
| 41 |
821 |
#{source => Source, |
| 42 |
|
destination => Destination, |
| 43 |
|
sequence => Sequence, |
| 44 |
|
acknowledgement => Acknowledgement, |
| 45 |
|
data_offset => DataOffset, |
| 46 |
|
flags => #{ns => b(NS), |
| 47 |
|
cwr => b(CWR), |
| 48 |
|
ece => b(ECE), |
| 49 |
|
urg => b(URG), |
| 50 |
|
ack => b(ACK), |
| 51 |
|
psh => b(PSH), |
| 52 |
|
rst => b(RST), |
| 53 |
|
syn => b(SYN), |
| 54 |
|
fin => b(FIN)}, |
| 55 |
|
window_size => WindowSize, |
| 56 |
|
checksum => Checksum, |
| 57 |
|
data => Data}. |
| 58 |
|
|
| 59 |
6411 |
b(0) -> false; |
| 60 |
978 |
b(1) -> true. |
| 61 |
|
|