chore(all): replace netlink library for more flexibility (#3107)

internal/wireguard/helpers_test.go

@@ -1,3 +1,53 @@
 package wireguard
 
+import (
+	"math/rand/v2"
+	"net/netip"
+
+	"github.com/qdm12/gluetun/internal/netlink"
+)
+
 func ptrTo[T any](x T) *T { return &x }
+
+var rng = rand.New(rand.NewChaCha8([32]byte{})) //nolint:gosec,gochecknoglobals
+
+func makeLinkName() string {
+	const alphabet = "abcdefghijklmnopqrstuvwxyz"
+	b := make([]byte, 8)
+	for i := range b {
+		b[i] = alphabet[rng.IntN(len(alphabet))]
+	}
+	return "test" + string(b)
+}
+
+func rulesAreEqual(a, b netlink.Rule) bool {
+	return ipPrefixesAreEqual(a.Src, b.Src) &&
+		ipPrefixesAreEqual(a.Dst, b.Dst) &&
+		ptrsEqual(a.Priority, b.Priority) &&
+		a.Table == b.Table &&
+		a.Family == b.Family &&
+		a.Flags == b.Flags &&
+		a.Action == b.Action &&
+		ptrsEqual(a.Mark, b.Mark)
+}
+
+func ipPrefixesAreEqual(a, b netip.Prefix) bool {
+	if !a.IsValid() && !b.IsValid() {
+		return true
+	}
+	if !a.IsValid() || !b.IsValid() {
+		return false
+	}
+	return a.Bits() == b.Bits() &&
+		a.Addr().Compare(b.Addr()) == 0
+}
+
+func ptrsEqual(a, b *uint32) bool {
+	if a == nil && b == nil {
+		return true
+	}
+	if a == nil || b == nil {
+		return false
+	}
+	return *a == *b
+}