[Feature] multi-cast filter

solaris111 commented 2 years ago

Description

非常感谢！这个工具确实很有用。我搭了个试验环境，测试在IPV6环境下UDP报文的转发。测试发现，在tun接口up时会有大量的udp 组播报文（估计是windows 发现之类用途的）。这些报文对danted造成了严重干扰，在danted无法转发的情况下，这个工具会直接发fin/ack。我估计您是出于性能考虑，所以没有过滤掉这些，如果可能还是过滤下比较好。PS，IPV6下UDP透传我只发现了这个工具和proxycap可以用，sstap、clash、go-tun2socks之流全挂了，代码里面bug太多。clash可能直接用的go-tun2socks甚至连udp associate协议都没搞明白。ps,yaml文件咋编写？

Is this feature related to a specific bug?

No response

Do you have a specific solution in mind?

No response

solaris111 commented 2 years ago

echo 的日志，当有组播报文时就不转发了： time="2022-05-14T09:18:24+08:00" level=info msg="[UDP] [fe80::d1dd:75eb:981b:aab1]:8000 --> [fc11::12]:7" time="2022-05-14T09:18:24+08:00" level=info msg="[UDP] [fe80::d1dd:75eb:981b:aab1]:8000 --> [fc11::12]:7" time="2022-05-14T09:18:24+08:00" level=info msg="[UDP] [fe80::d1dd:75eb:981b:aab1]:8000 <-- [fc11::12]:7" time="2022-05-14T09:18:24+08:00" level=info msg="[UDP] [fe80::d1dd:75eb:981b:aab1]:8000 <-- [fc11::12]:7" time="2022-05-14T09:18:24+08:00" level=info msg="[UDP] 169.254.32.230:5353 --> 224.0.0.251:5353" time="2022-05-14T09:18:24+08:00" level=info msg="[UDP] 169.254.32.230:5353 --> 224.0.0.251:5353" time="2022-05-14T09:18:24+08:00" level=info msg="[UDP] 169.254.32.230:5353 --> 224.0.0.251:5353" time="2022-05-14T09:18:24+08:00" level=info msg="[UDP] 169.254.32.230:5353 --> 224.0.0.251:5353" time="2022-05-14T09:18:24+08:00" level=info msg="[UDP] [fe80::e4d5:ee3a:e633:a2dd]:5353 --> [ff02::fb]:5353" time="2022-05-14T09:18:24+08:00" level=info msg="[UDP] 169.254.32.230:5353 --> 224.0.0.251:5353" time="2022-05-14T09:18:24+08:00" level=info msg="[UDP] [fe80::e4d5:ee3a:e633:a2dd]:5353 --> [ff02::fb]:5353" time="2022-05-14T09:18:24+08:00" level=info msg="[UDP] [fe80::e4d5:ee3a:e633:a2dd]:57064 --> [ff02::1:3]:5355" time="2022-05-14T09:18:24+08:00" level=info msg="[UDP] 169.254.32.230:5353 --> 224.0.0.251:5353" time="2022-05-14T09:18:24+08:00" level=info msg="[UDP] [fe80::e4d5:ee3a:e633:a2dd]:5353 --> [ff02::fb]:5353" time="2022-05-14T09:18:24+08:00" level=info msg="[UDP] 169.254.32.230:57064 --> 224.0.0.252:5355" time="2022-05-14T09:18:24+08:00" level=info msg="[UDP] 169.254.32.230:5353 --> 224.0.0.251:5353" time="2022-05-14T09:18:24+08:00" level=info msg="[UDP] [fe80::e4d5:ee3a:e633:a2dd]:5353 --> [ff02::fb]:5353" time="2022-05-14T09:18:24+08:00" level=info msg="[UDP] [fe80::e4d5:ee3a:e633:a2dd]:5353 --> [ff02::fb]:5353" time="2022-05-14T09:18:24+08:00" level=info msg="[UDP] [fe80::e4d5:ee3a:e633:a2dd]:5353 --> [ff02::fb]:5353" time="2022-05-14T09:18:24+08:00" level=info msg="[UDP] [fe80::e4d5:ee3a:e633:a2dd]:5353 --> [ff02::fb]:5353" time="2022-05-14T09:18:25+08:00" level=info msg="[UDP] [fe80::e4d5:ee3a:e633:a2dd]:8000 --> [fc11::12]:7" time="2022-05-14T09:18:25+08:00" level=info msg="[UDP] [fe80::e4d5:ee3a:e633:a2dd]:8000 <-- [fc11::12]:7"

solaris111 commented 2 years ago

用户程序提示连接断开