imsnif/bandwhich

Unable to detect some traffic

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#360 创建于 2024年1月30日

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 (4 评论) (0 反应) (0 负责人)Rust (7,686 star) (237 fork)batch import
bughelp wanted

描述

TLDR

I set up an iperf3 on a remote machine with iperf3 -s, and connected to it on my local box with iperf3 -c <ADDR>. bandwhich is able to detect the upload traffic as expected.

However, if I connect to it with iperf3 -R -c <ADDR>, so that the server is sending data to the client instead, bandwhich shows very little traffic (which I suppose is the control channel).

Screenshots

up

down

Here you can see bandwhich side-by-side with btop, which is able to detect both upload and download traffic correctly. There's obviously something wrong.

贡献者指南

技术栈
rust
领域
cliobservability
议题类型
bug
难度面向新贡献者的预计实现难度，1 表示很小改动，5 表示专家级工作。
3
预计时间有经验贡献者完成调查、实现、测试并准备 pull request 的粗略时间范围。
1-3 hours
活动状态议题当前的可参与程度：新鲜、活跃、陈旧、阻塞或等待维护者输入。
active
清晰度议题是否清楚说明期望改动、验收标准和下一步。
clear
前置要求
Rustnetwork traffic fundamentals
新手友好度1-100 的估计分数，表示该议题对首次贡献者的友好程度。
65
研究方向
Look into the packet capture logic in the Rust codebase—likely files in `src/` related to traffic detection. Compare the code paths for upload (client >server) and download (server >client) traffic. The issue suggests a filtering or parsing bug for reverse direction. Investigate how the tool identifies TCP connections and whether it handles SYN ACKs or data flow correctly.