# Timestamping
- https://www.kernel.org/doc/html/latest/networking/timestamping.html
- https://github.com/nix-rust/nix/pull/1547
- https://linux.die.net/man/2/recvmsg
- https://github.com/ptpd/ptpd/blob/1ec9e650b03e6bd75dd3179fb5f09862ebdc54bf/src/dep/net.c
- Wireshark filter: `ip.addr >= 224.0.0.0 and (igmp or ptp)`