Require exact DHCP request and response ports#174
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What changed
Why
The UDP helper classified packets as DHCP when either side of the port pair matched. That broadened the broadcast allow path for VM DHCP requests and widened the host-side snooping match before DHCP payload decoding.
Validation
cargo fmtcargo test --no-run udp_packet_helper.cargo/config.tomlforcesrunner = "sudo -E"on this target