Match on IPv4 header options like source routing, record route, timestamp and router-alert.

--ssrr
    To match packets with the flag strict source routing.

--lsrr
    To match packets with the flag loose source routing.

--no-srr
    To match packets with no flag for source routing.

[!] --rr
    To match packets with the RR flag.

[!] --ts
    To match packets with the TS flag.

[!] --ra
    To match packets with the router-alert option.

[!] --any-opt
    To match a packet with at least one IP option, or no IP option at all if ! is chosen.

Examples:

$ iptables -A input -m ipv4options --rr -j DROP
    will drop packets with the record-route flag.

$ iptables -A input -m ipv4options --ts -j DROP
    will drop packets with the timestamp flag.