[client] Close the remote conn in proxy (#2626)

Port the conn close call to eBPF proxy

client/internal/wgproxy/factory_linux.go

@@ -3,20 +3,26 @@
 package wgproxy
 
 import (
-	"context"
-
 	log "github.com/sirupsen/logrus"
+
+	"github.com/netbirdio/netbird/client/internal/wgproxy/ebpf"
+	"github.com/netbirdio/netbird/client/internal/wgproxy/usp"
 )
 
-func NewFactory(ctx context.Context, userspace bool, wgPort int) *Factory {
+type Factory struct {
+	wgPort    int
+	ebpfProxy *ebpf.WGEBPFProxy
+}
+
+func NewFactory(userspace bool, wgPort int) *Factory {
 	f := &Factory{wgPort: wgPort}
 
 	if userspace {
 		return f
 	}
 
-	ebpfProxy := NewWGEBPFProxy(ctx, wgPort)
-	err := ebpfProxy.listen()
+	ebpfProxy := ebpf.NewWGEBPFProxy(wgPort)
+	err := ebpfProxy.Listen()
 	if err != nil {
 		log.Warnf("failed to initialize ebpf proxy, fallback to user space proxy: %s", err)
 		return f
@@ -25,3 +31,20 @@ func NewFactory(ctx context.Context, userspace bool, wgPort int) *Factory {
 	f.ebpfProxy = ebpfProxy
 	return f
 }
+
+func (w *Factory) GetProxy() Proxy {
+	if w.ebpfProxy != nil {
+		p := &ebpf.ProxyWrapper{
+			WgeBPFProxy: w.ebpfProxy,
+		}
+		return p
+	}
+	return usp.NewWGUserSpaceProxy(w.wgPort)
+}
+
+func (w *Factory) Free() error {
+	if w.ebpfProxy == nil {
+		return nil
+	}
+	return w.ebpfProxy.Free()
+}