Glue up all together

client/internal/proxy/direct.go

@@ -0,0 +1,55 @@
+package proxy
+
+import (
+	log "github.com/sirupsen/logrus"
+	"net"
+)
+
+// DirectNoProxy is used when there is no need for a proxy between ICE and WireGuard.
+// This is possible in either of these cases:
+// - peers are in the same local network
+// - one of the peers has a public static IP (host)
+// DirectNoProxy will just update remote peer with a remote host and fixed WireGuard port (r.g. 51820).
+// In order DirectNoProxy to work, WireGuard port has to be fixed for the time being.
+type DirectNoProxy struct {
+	config Config
+	// RemoteWgListenPort is a WireGuard port of a remote peer.
+	// It is used instead of the hardcoded 51820 port.
+	RemoteWgListenPort int
+}
+
+// NewDirectNoProxy creates a new DirectNoProxy with a provided config and remote peer's WireGuard listen port
+func NewDirectNoProxy(config Config, remoteWgPort int) *DirectNoProxy {
+	return &DirectNoProxy{config: config, RemoteWgListenPort: remoteWgPort}
+}
+
+func (p *DirectNoProxy) Close() error {
+	err := p.config.WgInterface.RemovePeer(p.config.RemoteKey)
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+// Start just updates WireGuard peer with the remote IP and default WireGuard port
+func (p *DirectNoProxy) Start(remoteConn net.Conn) error {
+
+	log.Debugf("using DirectNoProxy while connecting to peer %s", p.config.RemoteKey)
+	addr, err := net.ResolveUDPAddr("udp", remoteConn.RemoteAddr().String())
+	if err != nil {
+		return err
+	}
+	addr.Port = p.RemoteWgListenPort
+	err = p.config.WgInterface.UpdatePeer(p.config.RemoteKey, p.config.AllowedIps, DefaultWgKeepAlive,
+		addr, p.config.PreSharedKey)
+
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (p *DirectNoProxy) Type() Type {
+	return TypeDirectNoProxy
+}