update nginx proxy validator for ipFamily

internal/mode/static/state/graph/nginxproxy.go

@@ -108,5 +108,21 @@ func validateNginxProxy(
 		}
 	}
 
+	if npCfg.Spec.IPFamily != nil {
+		ipFamily := npCfg.Spec.IPFamily
+		ipFamilyPath := spec.Child("ipFamily")
+		switch *ipFamily {
+		case ngfAPI.Dual,
+			ngfAPI.IPv4,
+			ngfAPI.IPv6:
+		default:
+			allErrs = append(allErrs, field.NotSupported(
+				ipFamilyPath,
+				ipFamily,
+				[]string{string(ngfAPI.Dual), string(ngfAPI.IPv4), string(ngfAPI.IPv6)}),
+			)
+		}
+	}
+
 	return allErrs
 }

internal/mode/static/state/graph/nginxproxy_test.go

@@ -262,6 +262,7 @@ func TestValidateNginxProxy(t *testing.T) {
 							{Key: "key", Value: "value"},
 						},
 					},
+					IPFamily: helpers.GetPointer[ngfAPI.IPFamilyType](ngfAPI.Dual),
 				},
 			},
 			expectErrCount: 0,
@@ -326,6 +327,18 @@ func TestValidateNginxProxy(t *testing.T) {
 			expErrSubstring: "telemetry.spanAttributes",
 			expectErrCount:  2,
 		},
+		{
+			name:      "invalid ipFamily type",
+			validator: createInvalidValidator(),
+			np: &ngfAPI.NginxProxy{
+				Spec: ngfAPI.NginxProxySpec{
+					Telemetry: &ngfAPI.Telemetry{},
+					IPFamily:  helpers.GetPointer[ngfAPI.IPFamilyType]("invalid"),
+				},
+			},
+			expErrSubstring: "spec.ipFamily",
+			expectErrCount:  1,
+		},
 	}
 
 	for _, test := range tests {