Use tcpip.Subnet in tcpip.Route

This is the first step in replacing some of the redundant types with the
standard library equivalents.

PiperOrigin-RevId: 264706552

2 files changed, 18 insertions, 0 deletions

diff --git a/pkg/tcpip/header/ipv4.go b/pkg/tcpip/header/ipv4.go
index 94a3af289..17fc9c68e 100644
--- a/pkg/tcpip/header/ipv4.go
+++ b/pkg/tcpip/header/ipv4.go
@@ -111,6 +111,15 @@ const (
 	IPv4FlagDontFragment
 )
 
+// IPv4EmptySubnet is the empty IPv4 subnet.
+var IPv4EmptySubnet = func() tcpip.Subnet {
+	subnet, err := tcpip.NewSubnet(IPv4Any, tcpip.AddressMask(IPv4Any))
+	if err != nil {
+		panic(err)
+	}
+	return subnet
+}()
+
 // IPVersion returns the version of IP used in the given packet. It returns -1
 // if the packet is not large enough to contain the version field.
 func IPVersion(b []byte) int {
diff --git a/pkg/tcpip/header/ipv6.go b/pkg/tcpip/header/ipv6.go
index 95fe8bfc3..31be42ce0 100644
--- a/pkg/tcpip/header/ipv6.go
+++ b/pkg/tcpip/header/ipv6.go
@@ -82,6 +82,15 @@ const (
 	IPv6Any tcpip.Address = "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
 )
 
+// IPv6EmptySubnet is the empty IPv6 subnet.
+var IPv6EmptySubnet = func() tcpip.Subnet {
+	subnet, err := tcpip.NewSubnet(IPv6Any, tcpip.AddressMask(IPv6Any))
+	if err != nil {
+		panic(err)
+	}
+	return subnet
+}()
+
 // PayloadLength returns the value of the "payload length" field of the ipv6
 // header.
 func (b IPv6) PayloadLength() uint16 {