You cannot select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
tailscale/types/nettype/nettype.go

57 lines
1.5 KiB
Go

// Copyright (c) Tailscale Inc & AUTHORS
// SPDX-License-Identifier: BSD-3-Clause
// Package nettype defines an interface that doesn't exist in the Go net package.
package nettype
import (
"context"
"net"
"net/netip"
)
// PacketListener defines the ListenPacket method as implemented
// by net.ListenConfig, net.ListenPacket, and tstest/natlab.
type PacketListener interface {
ListenPacket(ctx context.Context, network, address string) (net.PacketConn, error)
}
type PacketListenerWithNetIP interface {
ListenPacket(ctx context.Context, network, address string) (PacketConn, error)
}
// Std implements PacketListener using the Go net package's ListenPacket func.
type Std struct{}
func (Std) ListenPacket(ctx context.Context, network, address string) (net.PacketConn, error) {
var conf net.ListenConfig
return conf.ListenPacket(ctx, network, address)
}
type PacketConn interface {
net.PacketConn
WriteToUDPAddrPort([]byte, netip.AddrPort) (int, error)
}
func MakePacketListenerWithNetIP(ln PacketListener) PacketListenerWithNetIP {
return packetListenerAdapter{ln}
}
type packetListenerAdapter struct {
PacketListener
}
func (a packetListenerAdapter) ListenPacket(ctx context.Context, network, address string) (PacketConn, error) {
pc, err := a.PacketListener.ListenPacket(ctx, network, address)
if err != nil {
return nil, err
}
return pc.(PacketConn), nil
}
// ConnPacketConn is the interface that's a superset of net.Conn and net.PacketConn.
type ConnPacketConn interface {
net.Conn
net.PacketConn
}