Documentation
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Index ¶
- Variables
- func Listen(port int, filter BPFFilter) (net.PacketConn, error)
- type BPFFilter
- type STUNFilter
- type SharedSocket
- func (s *SharedSocket) Close() error
- func (s *SharedSocket) LocalAddr() net.Addr
- func (s *SharedSocket) ReadFrom(b []byte) (n int, addr net.Addr, err error)
- func (s *SharedSocket) SetDeadline(t time.Time) error
- func (s *SharedSocket) SetReadDeadline(t time.Time) error
- func (s *SharedSocket) SetWriteDeadline(t time.Time) error
- func (s *SharedSocket) WriteTo(buf []byte, rAddr net.Addr) (n int, err error)
Constants ¶
This section is empty.
Variables ¶
ErrSharedSockStopped indicates that shared socket has been stopped
Functions ¶
Types ¶
type BPFFilter ¶
type BPFFilter interface {
// GetInstructions returns raw BPF instructions for ipv4 and ipv6
GetInstructions(port uint32) (ipv4 []bpf.RawInstruction, ipv6 []bpf.RawInstruction, err error)
}
BPFFilter is a generic filter that provides ipv4 and ipv6 BPF instructions
func NewSTUNFilter ¶
func NewSTUNFilter() BPFFilter
NewSTUNFilter creates an instance of a STUNFilter
type STUNFilter ¶
type STUNFilter struct {
}
STUNFilter implements BPFFilter by filtering on STUN packets. Other packets (non STUN) will be forwarded to the process that own the port (e.g., WireGuard).
func (STUNFilter) GetInstructions ¶
func (sf STUNFilter) GetInstructions(port uint32) (raw4 []bpf.RawInstruction, raw6 []bpf.RawInstruction, err error)
GetInstructions returns raw BPF instructions for ipv4 and ipv6 that filter out anything but STUN packets
type SharedSocket ¶
type SharedSocket struct {
// contains filtered or unexported fields
}
SharedSocket is a net.PacketConn that initiates two raw sockets (ipv4 and ipv6) and listens to UDP packets filtered by BPF instructions (e.g., STUNFilter that checks and sends only STUN packets to the listeners (ReadFrom)).
func (*SharedSocket) Close ¶
func (s *SharedSocket) Close() error
Close closes the underlying ipv4 and ipv6 conn sockets
func (*SharedSocket) LocalAddr ¶
func (s *SharedSocket) LocalAddr() net.Addr
LocalAddr returns an IPv4 address using the supplied port
func (*SharedSocket) SetDeadline ¶
func (s *SharedSocket) SetDeadline(t time.Time) error
SetDeadline sets both the read and write deadlines associated with the ipv4 and ipv6 Conn sockets
func (*SharedSocket) SetReadDeadline ¶
func (s *SharedSocket) SetReadDeadline(t time.Time) error
SetReadDeadline sets the read deadline associated with the ipv4 and ipv6 Conn sockets
func (*SharedSocket) SetWriteDeadline ¶
func (s *SharedSocket) SetWriteDeadline(t time.Time) error
SetWriteDeadline sets the write deadline associated with the ipv4 and ipv6 Conn sockets
Source Files