Merge pull request #55601 from m1093782566/getlocalips

Automatic merge from submit-queue (batch tested with PRs 55009, 55532, 55601, 52569, 55533). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

Fix ipvs/proxy getLocalIPs inconsistency with iptables/proxy

**What this PR does / why we need it**:

* Fix ipvs/proxy `getLocalIPs()` inconsistency with iptables/proxy

* validate the ip address before pkg/proxy/util IPPart() return ip string.

**Which issue(s) this PR fixes** :
Fixes #55612

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```

pkg/proxy/iptables/proxier.go

@@ -798,7 +798,7 @@ func getLocalIPs(endpointsMap proxyEndpointsMap) map[types.NamespacedName]sets.S
 	for svcPortName := range endpointsMap {
 		for _, ep := range endpointsMap[svcPortName] {
 			if ep.isLocal {
-				// If the endpoint has a bad format, ipPart() will log an
+				// If the endpoint has a bad format, utilproxy.IPPart() will log an
 				// error and ep.IPPart() will return a null string.
 				if ip := ep.IPPart(); ip != "" {
 					nsn := svcPortName.NamespacedName

pkg/proxy/iptables/proxier_test.go

@@ -1281,6 +1281,14 @@ func Test_getLocalIPs(t *testing.T) {
 			{Namespace: "ns2", Name: "ep2"}: sets.NewString("2.2.2.2", "2.2.2.22", "2.2.2.3"),
 			{Namespace: "ns4", Name: "ep4"}: sets.NewString("4.4.4.4", "4.4.4.6"),
 		},
+	}, {
+		// Case[5]: named port local and bad endpoints IP
+		endpointsMap: map[proxy.ServicePortName][]*endpointsInfo{
+			makeServicePortName("ns1", "ep1", "p11"): {
+				{endpoint: "bad ip:11", isLocal: true},
+			},
+		},
+		expected: map[types.NamespacedName]sets.String{},
 	}}
 
 	for tci, tc := range testCases {