ApplyBPF constructs a BPF program and applies it to the RawConn.

GetClientIP gets source ip address that will be used when sending data to dstIP.

Handshake performs a Noise-IK handshake with the Server.

HostToAddr resolves a hostname, whether DNS or IP to a valid net.IPAddr.

MakePacket constructs a request packet to send to the server.

ParseResponse takes a response packet and parses it into an IP and port.

RecvDataPacket recieves a UDP packet from server.

RecvPacket recieves a UDP packet from server.

SendDataPacket encrypts and sends packet to the Server.

SendPacket sends packet to the Server.

SetupRawConn creates an ipv4 and udp only RawConn and applies packet filtering.

EmptyUDPSize is the size of an empty UDP packet.

PacketData identifies regular data packets.

PacketHandshakeInit identifies handhshake initiation packets.

PacketHandshakeResp identifies handhshake response packets.

ErrNonce is returned when the nonce on a packet isn't valid.

ErrPacketType is returned when an unexepcted packet type is enountered.

RekeyDuration is the time after which keys are invalid and a new handshake is required.

Peer stores data about a peer's key and endpoint, whether it's another peer or the client While Resolved == false, we consider IP and Port to be uninitialized I could have done a nested struct with Endpoint containing IP and Port but that's unnecessary right now.

Server stores data relating to the server.

Key stores a 32 byte representation of a Wireguard key.