Cloudflare tuam txhab
Cov khoom siv xdpcap yog sib xws nrog tcpdump / libpcap filtering kab lus thiab tso cai rau koj ua cov khoom loj loj ntawm cov khoom siv tib yam. Xdpcap kuj tseem tuaj yeem siv rau kev debugging nyob rau hauv ib puag ncig uas tsis tu ncua tcpdump tsis siv, xws li lim, DoS tiv thaiv, thiab thauj khoom sib npaug uas siv Linux ntsiav XDP subsystem, uas ua cov pob ntawv ua ntej lawv ua tiav los ntawm Linux ntsiav networking pawg (tcpdump tsis pom pob ntawv poob los ntawm XDP handler).
Kev ua tau zoo yog ua tiav los ntawm kev siv eBPF thiab XDP subsystems. eBPF yog tus neeg txhais lus bytecode ua rau hauv Linux ntsiav uas tso cai rau koj los tsim cov neeg ua haujlwm tau zoo ntawm cov khoom xa tuaj / tawm nrog kev txiav txim siab txog kev xa lossis muab pov tseg. Siv JIT compiler, eBPF bytecode tau txhais ntawm ya mus rau hauv cov lus qhia tshuab thiab ua tiav nrog kev ua haujlwm ntawm cov cai ib txwm muaj. XDP (eXpress Data Path) subsystem ntxiv rau eBPF nrog lub peev xwm los khiav BPF cov kev pab cuam ntawm qib tsav tsheb hauv lub network, nrog kev txhawb nqa ncaj qha mus rau DMA pob ntawv tsis thiab ua haujlwm ntawm theem ua ntej skbuff tsis yog faib los ntawm pawg network.
Zoo li tcpdump, cov khoom siv xdpcap ua ntej txhais cov txheej txheem kev lim dej siab rau hauv classic BPF sawv cev (cBPF) siv lub tsev qiv ntawv libpcap txheem, thiab tom qab ntawd hloov lawv mus rau hauv daim ntawv ntawm eBPF niaj hnub siv lub compiler.
Tau qhov twg los: opennet.ru