INT watchlist causes table hit for ARP and LLDP pkt

[ccascone]

The watchlist is designed to match only on IPv4 flows. This is probably happening because of PHV conflicts (arp/lldp fields ending up in ipv4/udp/tcp fields).

We should update the watchlist table to either:

• match on ipv4 validity bit
• wrap table apply with gateway condition (if (hdr.ipv4.isValid()) watchlist.apply())

We should check all the other tables in the pipeline. Do we check header validity when matching certain fields?

I wish the compiler would be capable of emitting warnings for such conditions.