NewNetworkDeviceIOChannels constructs two channels with size == [DefaultBufferChannel].

CONTINUE lets the [*Packet] continue through the chain.

DefaultBufferChannel is the required buffering for [NetworkDevice] channels.

DROP silently discards the [*Packet].

IPProtocolTCP is the TCP protocol number.

IPProtocolUDP is the UDP protocol number.

TCPFlagACK is the ACK flag.

TCPFlagFIN is the FIN flag.

TCPFlagPSH is the PSH flag.

TCPFlagRST is the RST flag.

TCPFlagSYN is the SYN flag.

Packet is a network packet.

Filter processes [*Packet] and determines its fate.

NetworkDevice is a network device to read/write [*Packet].

FilterFunc allows using a function as a [Filter].

IPProtocol is the protocol number of an IP packet.

Target represents what to do with a [*Packet] similarly to `iptables` target.

TCPFlags is a set of TCP flags.