Linux 7.3 · TCP/IPv4 and UDP/IPv4
Linux 7.3
Linux 5.10
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UA
A Packet’s Path Through the Linux Kernel
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Receive
Forward
TCP
UDP
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socket write queue
socket receive queue
IPv4 + netfilter
qdisc
NIC
TX ring
RX ring
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data
sk_buff
Ethernet
IPv4
TCP