feat: Waku v2 bridge

Issue #12610

vendor/github.com/google/gopacket/routing/common.go

@@ -0,0 +1,36 @@
+// Copyright 2012 Google, Inc. All rights reserved.
+//
+// Use of this source code is governed by a BSD-style license
+// that can be found in the LICENSE file in the root of the source
+// tree.
+
+package routing
+
+import (
+	"net"
+)
+
+// Router implements simple IPv4/IPv6 routing based on the kernel's routing
+// table.  This routing library has very few features and may actually route
+// incorrectly in some cases, but it should work the majority of the time.
+type Router interface {
+	// Route returns where to route a packet based on the packet's source
+	// and destination IP address.
+	//
+	// Callers may pass in nil for src, in which case the src is treated as
+	// either 0.0.0.0 or ::, depending on whether dst is a v4 or v6 address.
+	//
+	// It returns the interface on which to send the packet, the gateway IP
+	// to send the packet to (if necessary), the preferred src IP to use (if
+	// available).  If the preferred src address is not given in the routing
+	// table, the first IP address of the interface is provided.
+	//
+	// If an error is encountered, iface, geteway, and
+	// preferredSrc will be nil, and err will be set.
+	Route(dst net.IP) (iface *net.Interface, gateway, preferredSrc net.IP, err error)
+
+	// RouteWithSrc routes based on source information as well as destination
+	// information.  Either or both of input/src can be nil.  If both are, this
+	// should behave exactly like Route(dst)
+	RouteWithSrc(input net.HardwareAddr, src, dst net.IP) (iface *net.Interface, gateway, preferredSrc net.IP, err error)
+}