Filter.compile

PcapStatus compile(PcapHandle *  handle,  string filterStr,  bool  optimize =  true,  uint  netmask =  PCAP_NETMASK_UNKNOWN)

Compiles a BPF filter string.

`handle`	The pcap handle to use for compilation (can be a dead handle).
`filterStr`	The BPF filter expression (e.g. "tcp port 80").
`optimize`	Whether to optimize the compiled code.
`netmask`	The netmask of the interface (use `PCAP_NETMASK_UNKNOWN` if unknown).

A PcapStatus indicating success or error.