网络杂谈
CONFIG_NETDEVSIM
- https://docs.kernel.org/networking/devlink/netdevsim.html
我靠,我太搞清楚这个东西
CONFIG_DUMMY
sudo modprobe dummy
- https://unix.stackexchange.com/questions/335284/how-can-we-create-multiple-dummy-interfaces-on-linux
- https://askubuntu.com/questions/1050353/ubuntu-18-04-how-to-create-a-persistent-dummy-network-interface
使用 dummy 创建网桥 http://thomas.goirand.fr/blog/?p=303
说实话,还是没怎么玩清楚。
- https://www.josehu.com/technical/2023/10/28/emulating-network-env.html
- 这里同时分析过 dummy 和 netsim
/dev/null 的
- https://superuser.com/questions/698244/ip-address-that-is-the-equivalent-of-dev-null
- https://networkengineering.stackexchange.com/questions/7456/what-is-null-0-interface
netem
https://man7.org/linux/man-pages/man8/tc-netem.8.html
具体实现的位置: net/sched/sch_netem.c
tc qdisc add dev eth0 root netem delay 100ms
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