Comments (8)
jack2007
commented on July 17, 2024
1
@frjalex 手机端的流量肯定是两倍；
手机端的TCP协议栈收到重复报文后会丢弃掉，但是从运营商的计费系统来看，IP报文已经到了你的手机，流量肯定是要算你的；
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snooda
commented on July 17, 2024
返4次并不是真的有4个应答包。
发一次ping，net-speeder会double成两个。
不丢包的情况下对端返回两个。
net-speeder内部再double一下，所以看起来是4个包，实际在网络上的只有两个。
至于为啥返回包也要内部double，是为了更快触发快速重传。
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Halry
commented on July 17, 2024
有人说在windows 下ttl值更大，会有更多包，是这样吗？（在学校没电脑测试😂）
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snooda
commented on July 17, 2024
理论上不会，这个跟ttl的大小无关的
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Halry
commented on July 17, 2024
哦。
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Bestoa
commented on July 17, 2024
@Halry TTL是我说的，但并不是说windows会多发包，而是88这个值不妥。
Windows 默认TTL是128，一般收到的时候是108左右，一般确实不会掉到88，但是。。。建议改成68
另外可以根据网卡类型去决定lenth，去掉COOKED宏。
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snooda
commented on July 17, 2024
@Bestoa 收到，我后续会考虑修改这个值。
其实88只是个magic number而已。改大改小总会有人恰好到这个值。
net-speeder主要依赖的是向外发出包的ttl。收到包的ttl不太重要
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Halry
commented on July 17, 2024
@snooda我真的不明白bpf和cooked的意思。。。
还有，我用这个的话手机上流量会翻倍吗？
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