问题描述：一直使用作者的kcptun用于加速流量，对此非常感谢作者对开源的贡献。但因为水平有限只能将问题反馈出来

1、升级最新版本后，服务端经常出现io close，旧版本不会，具体表现为两次iperf测速后（跑满宽带），立马会出现无法发起任何连接（断流）
2、配置使用作者提供的配置#923
3、怀疑为7月27日的一次提交导致的，并且问题一直存在，链接：4193bb6

1. 检查 -key xxx至少三遍,—— 检查一致
2. 保证-nocomp, -datashard, -parityshard, -key, -crypt, -smuxver, -QPP -QPPCount两边一致。—— 检查一致
3. 是否在服务器端，正确设定了转发的目标服务器地址 --target。—— 检查通过
4. 是否在客户端，正确的连接到了 client的监听端口。—— 检查通过
5. 如果第3条不确定，尝试在服务器上telnet target port试试。
6. 防火墙是否关闭了UDP通信，或者设置了UDP的最大发包速率？——直连
7. 两端的版本是否一致？—— 检查一致
8. **是不是最新版本？——是
9. 两端分别是什么操作系统？——Ubuntu——centos，Rocky——openwrt
10. 两端的输出日志是什么？
    Server 端
    2024/08/30 11:36:06 remote address: 192.168.198.235:52815 2024/08/30 11:36:06 smux version: 2 on connection: [::]:39832 -> 192.168.198.235:52815 2024/08/30 11:36:20 remote address: 192.168.198.235:54825 2024/08/30 11:36:20 smux version: 2 on connection: [::]:39842 -> 192.168.198.235:54825 2024/08/30 11:36:20 stream opened in: 192.168.198.235:54825(3) out: 127.0.0.1:3389 2024/08/30 11:36:20 stream opened in: 192.168.198.235:54825(5) out: 127.0.0.1:3389 2024/08/30 11:36:20 stream opened in: 192.168.198.235:54825(7) out: 127.0.0.1:3389 2024/08/30 11:36:23 stream opened in: 192.168.198.235:54825(9) out: 127.0.0.1:3389 2024/08/30 11:36:23 stream opened in: 192.168.198.235:54825(11) out: 127.0.0.1:3389 2024/08/30 11:36:23 stream opened in: 192.168.198.235:54825(13) out: 127.0.0.1:3389 2024/08/30 11:36:26 stream opened in: 192.168.198.235:54825(15) out: 127.0.0.1:3389 2024/08/30 11:36:26 stream opened in: 192.168.198.235:54825(17) out: 127.0.0.1:3389 2024/08/30 11:36:26 stream opened in: 192.168.198.235:54825(19) out: 127.0.0.1:3389 2024/08/30 11:36:29 stream opened in: 192.168.198.235:54825(21) out: 127.0.0.1:3389 2024/08/30 11:36:36 io: read/write on closed pipe 2024/08/30 11:36:53 stream opened in: 192.168.198.235:54825(23) out: 127.0.0.1:3389 2024/08/30 11:36:53 stream opened in: 192.168.198.235:54825(25) out: 127.0.0.1:3389

Client
2024/08/30 11:36:06 remote address: 192.168.198.235:52815 2024/08/30 11:36:06 smux version: 2 on connection: [::]:39832 -> 192.168.198.235:52815 2024/08/30 11:36:20 remote address: 192.168.198.235:54825 2024/08/30 11:36:20 smux version: 2 on connection: [::]:39842 -> 192.168.198.235:54825 2024/08/30 11:36:20 stream opened in: 192.168.198.235:54825(3) out: 127.0.0.1:3389 2024/08/30 11:36:20 stream opened in: 192.168.198.235:54825(5) out: 127.0.0.1:3389 2024/08/30 11:36:20 stream opened in: 192.168.198.235:54825(7) out: 127.0.0.1:3389 2024/08/30 11:36:23 stream opened in: 192.168.198.235:54825(9) out: 127.0.0.1:3389 2024/08/30 11:36:23 stream opened in: 192.168.198.235:54825(11) out: 127.0.0.1:3389 2024/08/30 11:36:23 stream opened in: 192.168.198.235:54825(13) out: 127.0.0.1:3389 2024/08/30 11:36:26 stream opened in: 192.168.198.235:54825(15) out: 127.0.0.1:3389 2024/08/30 11:36:26 stream opened in: 192.168.198.235:54825(17) out: 127.0.0.1:3389 2024/08/30 11:36:26 stream opened in: 192.168.198.235:54825(19) out: 127.0.0.1:3389 2024/08/30 11:36:29 stream opened in: 192.168.198.235:54825(21) out: 127.0.0.1:3389 2024/08/30 11:36:36 io: read/write on closed pipe 2024/08/30 11:36:53 stream opened in: 192.168.198.235:54825(23) out: 127.0.0.1:3389 2024/08/30 11:36:53 stream opened in: 192.168.198.235:54825(25) out: 127.0.0.1:3389

附上配置：
server：
{ "smuxver": 2, "listen": "[::]:39810-39900", "target": "127.0.0.1:3389", "key": "123456789", "crypt": "aes", "mode": "fast", "mtu": 1400, "sndwnd": 2048, "rcvwnd": 2048, "datashard": 10, "parityshard": 0, "dscp": 46, "nocomp": true, "acknodelay": false, "nodelay": 1, "interval": 20, "resend": 2, "nc": 1, "sockbuf": 16777217, "smuxbuf": 16777217, "streambuf":4194304, "keepalive": 10, "pprof":false, "quiet":false, "tcp":false, "log": "/tmp/kcptun.log" }

客户端：
{ "smuxver": 2, "localaddr": "127.0.0.1:60002", "remoteaddr": "192.168.199.7:39810-39900", "key": "123456789", "crypt": "aes", "mode": "fast", "mtu": 1400, "sndwnd": 256, "rcvwnd": 2048, "datashard": 10, "parityshard": 0, "dscp": 46, "nocomp": true, "acknodelay": false, "nodelay": 1, "interval": 20, "resend": 2, "nc": 1, "conn": 1, "sockbuf": 16777217, "smuxbuf": 16777217, "streambuf":4194304, "keepalive": 10, "autoexpire":600, "quiet":true, "tcp":false, "log": "/tmp/kcptun.log" }

具体表现截图：