fix: http3 listener with multiple hostnames

internal/xds/translator/listener.go

@@ -350,7 +350,7 @@ func (t *Translator) addHCMToXDSListener(
 			Rds: &hcmv3.Rds{
 				ConfigSource: makeConfigSource(),
 				// Configure route name to be found via RDS.
-				RouteConfigName: routeConfigName(irListener, t.xdsNameSchemeV2()),
+				RouteConfigName: routeConfigName(irListener, http3Listener, t.xdsNameSchemeV2()),
 			},
 		},
 		HttpProtocolOptions: http1ProtocolOptions(irListener.HTTP1),
@@ -470,21 +470,26 @@ func (t *Translator) addHCMToXDSListener(
 			}
 		}
 		filterChain.TransportSocket = tSocket
-		filterChain.Name = httpsListenerFilterChainName(irListener)
+	}
 
-		if err := addServerNamesMatch(xdsListener, filterChain, irListener.Hostnames); err != nil {
-			return err
-		}
+	httpsListener := irListener.TLS != nil
+	httpListener := !httpsListener && !http3Listener
 
-		xdsListener.FilterChains = append(xdsListener.FilterChains, filterChain)
-	} else {
+	switch {
+	case httpListener || http3Listener:
 		// Add the HTTP filter chain as the default filter chain
 		// Make sure one does not exist
 		if xdsListener.DefaultFilterChain != nil {
 			return errors.New("default filter chain already exists")
 		}
-		filterChain.Name = httpListenerDefaultFilterChainName(irListener, t.xdsNameSchemeV2())
+		filterChain.Name = httpListenerDefaultFilterChainName(irListener, http3Listener, t.xdsNameSchemeV2())
 		xdsListener.DefaultFilterChain = filterChain
+	case httpsListener:
+		filterChain.Name = httpsListenerFilterChainName(irListener)
+		if err := addServerNamesMatch(xdsListener, filterChain, irListener.Hostnames); err != nil {
+			return err
+		}
+		xdsListener.FilterChains = append(xdsListener.FilterChains, filterChain)
 	}
 
 	return nil
@@ -503,17 +508,21 @@ func hcmStatPrefix(irListener *ir.HTTPListener, nameSchemeV2 bool) string {
 }
 
 // use the same name for the route config as the filter chain name, as they're 1:1 mapping.
-func routeConfigName(irListener *ir.HTTPListener, nameSchemeV2 bool) string {
+func routeConfigName(irListener *ir.HTTPListener, http3, nameSchemeV2 bool) string {
+	if http3 {
+		return httpListenerDefaultFilterChainName(irListener, true, nameSchemeV2)
+	}
 	if irListener.TLS != nil {
 		return httpsListenerFilterChainName(irListener)
 	}
-	return httpListenerDefaultFilterChainName(irListener, nameSchemeV2)
+	return httpListenerDefaultFilterChainName(irListener, false, nameSchemeV2)
 }
 
 // port value is used for the default filter chain name for HTTP listeners, as multiple HTTP listeners are merged into
 // one filter chain.
-func httpListenerDefaultFilterChainName(irListener *ir.HTTPListener, nameSchemeV2 bool) string {
-	if nameSchemeV2 {
+func httpListenerDefaultFilterChainName(irListener *ir.HTTPListener, http3, nameSchemeV2 bool) string {
+	// If HTTP3 is enabled, there must be only the default filter chain in the listener, as TLSInspector doesn't work for UDP.
+	if nameSchemeV2 || http3 {
 		return fmt.Sprint("http-", irListener.ExternalPort)
 	}
 	// For backward compatibility, we use the listener name as the filter chain name.

internal/xds/translator/testdata/in/xds-ir/http3.yaml

@@ -3,10 +3,11 @@ http:
   http3:
     quicPort: 443
   hostnames:
-  - '*'
+  - '*.example.com'
   isHTTP2: false
-  name: envoy-gateway/gateway-1/tls
+  name: envoy-gateway/gateway-1/https1
   port: 10443
+  externalPort: 443
   path:
     mergeSlashes: true
     escapedSlashesAction: UnescapeAndRedirect
@@ -22,12 +23,81 @@ http:
           port: 8080
         weight: 1
         name: httproute/default/httproute-1/rule/0/backend/0
-    hostname: '*'
+    hostname: 'foo.example.com'
     name: httproute/default/httproute-1/rule/0/match/0/*
     pathMatch:
       distinct: false
       name: ""
       prefix: /
+  - backendWeights:
+      invalid: 0
+      valid: 0
+    destination:
+      name: httproute/default/httproute-2/rule/0
+      settings:
+      - endpoints:
+        - host: 8.8.8.8
+          port: 8080
+        weight: 1
+        name: httproute/default/httproute-2/rule/0/backend/0
+    hostname: 'bar.example.com'
+    name: httproute/default/httproute-2/rule/0/match/0/*
+    pathMatch:
+      distinct: false
+      name: ""
+      prefix: /
+  tls:
+    certificates:
+    - name: envoy-gateway-tls-secret-1
+      privateKey: LS0tLS1CRUdJTiBQUklWQVRFIEtFWS0tLS0tCk1JSUV2UUlCQURBTkJna3Foa2lHOXcwQkFRRUZBQVNDQktjd2dnU2pBZ0VBQW9JQkFRQ2QwZlBDYWtweE1nUnUKT0VXQjFiQk5FM3ZseW55aTZWbkV2VWF1OUhvakR2UHVPTFJIaGI4MmoyY1ovMHhnL1lKR09LelBuV2JERkxGNApHdWh3dDRENmFUR0xYNklPODEwTDZ0SXZIWGZNUXRJS2VwdTZ3K3p1WVo4bG1yejB1RjZlWEtqamVIbHhyb2ZrCnVNekM3OUVaU0lYZlZlczJ1SmdVRSs4VGFzSDUzQ2Y4MFNSRGlIeEdxckttdVNjWCtwejBreGdCZ1VWYTVVS20KUWdTZDFmVUxLOUEwNXAxOXkrdURPM204bVhRNkxVQ0N1STFwZHNROGFlNS9zamlxa0VjWlJjMTdWYVgxWjVVaQpvcGZnNW9SY05VTG9VTHNiek9aNTR0YlVDUmdSV2VLbGZxaElINEZ6OUlkVlUyR3dFdEdhMmV6TjgyMVBaQ3QzCjZhbVRIelJsQWdNQkFBRUNnZ0VBWTFGTUlLNDVXTkVNUHJ6RTZUY3NNdVV2RkdhQVZ4bVk5NW5SMEtwajdvb3IKY21CVys2ZXN0TTQ4S1AwaitPbXd3VFpMY29Cd3VoWGN0V1Bob1lXcDhteWUxRUlEdjNyaHRHMDdocEQ1NGg2dgpCZzh3ejdFYStzMk9sT0N6UnlKNzBSY281YlhjWDNGaGJjdnFlRWJwaFFyQnpOSEtLMjZ4cmZqNWZIT3p6T1FGCmJHdUZ3SDVic3JGdFhlajJXM3c4eW90N0ZQSDV3S3RpdnhvSWU5RjMyOXNnOU9EQnZqWnpiaG1LVTArckFTK1kKRGVield2bFJyaEUrbXVmQTN6M0N0QXhDOFJpNzNscFNoTDRQQWlvcG1SUXlxZXRXMjYzOFFxcnM0R3hnNzhwbApJUXJXTmNBc2s3Slg5d3RZenV6UFBXSXRWTTFscFJiQVRhNTJqdFl2NVFLQmdRRE5tMTFtZTRYam1ZSFV2cStZCmFTUzdwK2UybXZEMHVaOU9JeFluQnBWMGkrckNlYnFFMkE1Rm5hcDQ5Yld4QTgwUElldlVkeUpCL2pUUkoxcVMKRUpXQkpMWm1LVkg2K1QwdWw1ZUtOcWxFTFZHU0dCSXNpeE9SUXpDZHBoMkx0UmtBMHVjSVUzY3hiUmVMZkZCRQpiSkdZWENCdlNGcWd0VDlvZTFldVpMVmFOd0tCZ1FERWdENzJENk81eGIweEQ1NDQ1M0RPMUJhZmd6aThCWDRTCk1SaVd2LzFUQ0w5N05sRWtoeXovNmtQd1owbXJRcE5CMzZFdkpKZFVteHdkU2MyWDhrOGcxMC85NVlLQkdWQWoKL3d0YVZYbE9WeEFvK0ZSelpZeFpyQ29uWWFSMHVwUzFybDRtenN4REhlZU9mUVZUTUgwUjdZN0pnbTA5dXQ4SwplanAvSXZBb1F3S0JnQjNaRWlRUWhvMVYrWjBTMlpiOG5KS0plMy9zMmxJTXFHM0ZkaS9RS3Q0eWViQWx6OGY5ClBZVXBzRmZEQTg5Z3grSU1nSm5sZVptdTk2ZnRXSjZmdmJSenllN216TG5zZU05TXZua1lHbGFGWmJRWnZubXMKN3ZoRmtzY3dHRlh4d21GMlBJZmU1Z3pNMDRBeVdjeTFIaVhLS2dNOXM3cGsxWUdyZGowZzdacmRBb0dCQUtLNApDR3MrbkRmMEZTMFJYOWFEWVJrRTdBNy9YUFhtSG5YMkRnU1h5N0Q4NTRPaWdTTWNoUmtPNTErbVNJejNQbllvCk41T1FXM2lHVVl1M1YvYmhnc0VSUzM1V2xmRk9BdDBzRUR5bjF5SVdXcDF5dG93d3BUNkVvUXVuZ2NYZjA5RjMKS1NROXowd3M4VmsvRWkvSFVXcU5LOWFXbU51cmFaT0ZqL2REK1ZkOUFvR0FMWFN3dEE3K043RDRkN0VEMURSRQpHTWdZNVd3OHFvdDZSdUNlNkpUY0FnU3B1MkhNU3JVY2dXclpiQnJZb09FUnVNQjFoMVJydk5ybU1qQlM0VW9FClgyZC8vbGhpOG1wL2VESWN3UDNRa2puanBJRFJWMFN1eWxrUkVaZURKZjVZb3R6eDdFdkJhbzFIbkQrWEg4eUIKVUtmWGJTaHZKVUdhRmgxT3Q1Y3JoM1k9Ci0tLS0tRU5EIFBSSVZBVEUgS0VZLS0tLS0K
+      certificate: 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
+- address: 0.0.0.0
+  http3:
+    quicPort: 443
+  hostnames:
+  - '*.api.com'
+  isHTTP2: false
+  name: envoy-gateway/gateway-1/https2
+  port: 10443
+  externalPort: 443
+  path:
+    mergeSlashes: true
+    escapedSlashesAction: UnescapeAndRedirect
+  routes:
+  - backendWeights:
+      invalid: 0
+      valid: 0
+    destination:
+      name: httproute/default/httproute-3/rule/0
+      settings:
+      - endpoints:
+        - host: 7.7.7.7
+          port: 8080
+        weight: 1
+        name: httproute/default/httproute-3/rule/0/backend/0
+    hostname: 'foo.api.com'
+    name: httproute/default/httproute-3/rule/0/match/0/*
+    pathMatch:
+      distinct: false
+      name: ""
+      prefix: /
+  - backendWeights:
+      invalid: 0
+      valid: 0
+    destination:
+      name: httproute/default/httproute-4/rule/0
+      settings:
+      - endpoints:
+        - host: 8.8.8.8
+          port: 8080
+        weight: 1
+        name: httproute/default/httproute-4/rule/0/backend/0
+    hostname: 'bar.api.com'
+    name: httproute/default/httproute-4/rule/0/match/0/*
+    pathMatch:
+      distinct: false
+      name: ""
+      prefix: /
   tls:
     certificates:
     - name: envoy-gateway-tls-secret-1

internal/xds/translator/testdata/in/xds-ir/multiple-listeners-same-port-with-different-filters.yaml

@@ -7,12 +7,11 @@ http:
     hostnames:
       - 'www.foo.com'
     isHTTP2: false
-    http3:
-      quicPort: 443
     path:
       escapedSlashesAction: UnescapeAndRedirect
       mergeSlashes: true
     port: 10080
+    externalPort: 80
     routes:
       - name: httproute/default/httproute-1/rule/0/match/0/www_foo_com
         hostname: www.foo.com

internal/xds/translator/testdata/out/xds-ir/http-route-with-clientcert.secrets.yaml

@@ -1,10 +1,10 @@
+- name: policy-btls/policies-ca
+  validationContext:
+    trustedCa:
+      inlineBytes: LS0tLS1CRUdJTiBDRVJUSUZJQ0FURS0tLS0tCk1JSURKekNDQWcrZ0F3SUJBZ0lVQWw2VUtJdUttenRlODFjbGx6NVBmZE4ySWxJd0RRWUpLb1pJaHZjTkFRRUwKQlFBd0l6RVFNQTRHQTFVRUF3d0hiWGxqYVdWdWRERVBNQTBHQTFVRUNnd0dhM1ZpWldSaU1CNFhEVEl6TVRBdwpNakExTkRFMU4xb1hEVEkwTVRBd01UQTFOREUxTjFvd0l6RVFNQTRHQTFVRUF3d0hiWGxqYVdWdWRERVBNQTBHCkExVUVDZ3dHYTNWaVpXUmlNSUlCSWpBTkJna3Foa2lHOXcwQkFRRUZBQU9DQVE4QU1JSUJDZ0tDQVFFQXdTVGMKMXlqOEhXNjJueW5rRmJYbzRWWEt2MmpDMFBNN2RQVmt5ODdGd2VaY1RLTG9XUVZQUUUycDJrTERLNk9Fc3ptTQp5eXIreHhXdHlpdmVyZW1yV3FuS2tOVFloTGZZUGhnUWtjemliN2VVYWxtRmpVYmhXZEx2SGFrYkVnQ29kbjNiCmt6NTdtSW5YMlZwaURPS2c0a3lIZml1WFdwaUJxckN4MEtOTHB4bzNERVFjRmNzUVRlVEh6aDQ3NTJHVjA0UlUKVGkvR0VXeXpJc2w0Umc3dEd0QXdtY0lQZ1VOVWZZMlEzOTBGR3FkSDRhaG4rbXcvNmFGYlczMVc2M2Q5WUpWcQppb3lPVmNhTUlwTTVCL2M3UWM4U3VoQ0kxWUdoVXlnNGNSSExFdzVWdGlraW95RTNYMDRrbmEzalFBajU0WWJSCmJwRWhjMzVhcEtMQjIxSE9VUUlEQVFBQm8xTXdVVEFkQmdOVkhRNEVGZ1FVeXZsMFZJNXZKVlN1WUZYdTdCNDgKNlBiTUVBb3dId1lEVlIwakJCZ3dGb0FVeXZsMFZJNXZKVlN1WUZYdTdCNDg2UGJNRUFvd0R3WURWUjBUQVFILwpCQVV3QXdFQi96QU5CZ2txaGtpRzl3MEJBUXNGQUFPQ0FRRUFNTHhyZ0ZWTXVOUnEyd0F3Y0J0N1NuTlI1Q2Z6CjJNdlhxNUVVbXVhd0lVaTlrYVlqd2RWaURSRUdTams3SlcxN3ZsNTc2SGpEa2RmUndpNEUyOFN5ZFJJblpmNkoKaThIWmNaN2NhSDZEeFIzMzVmZ0hWekxpNU5pVGNlL09qTkJRelEyTUpYVkRkOERCbUc1ZnlhdEppT0pRNGJXRQpBN0ZsUDBSZFAzQ08zR1dFME01aVhPQjJtMXFXa0UyZXlPNFVIdndUcU5RTGRyZEFYZ0RRbGJhbTllNEJHM0dnCmQvNnRoQWtXRGJ0L1FOVCtFSkhEQ3ZoRFJLaDFSdUdIeWcrWSsvbmViVFdXckZXc2t0UnJiT29IQ1ppQ3BYSTEKM2VYRTZudDBZa2d0RHhHMjJLcW5ocEFnOWdVU3MyaGxob3h5dmt6eUYwbXU2TmhQbHdBZ25xNysvUT09Ci0tLS0tRU5EIENFUlRJRklDQVRFLS0tLS0K
 - name: secret-1
   tlsCertificate:
     certificateChain:
       inlineBytes: Y2VydC1kYXRh
     privateKey:
       inlineBytes: a2V5LWRhdGE=
-- name: policy-btls/policies-ca
-  validationContext:
-    trustedCa:
-      inlineBytes: 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

internal/xds/translator/testdata/out/xds-ir/http3.clusters.yaml

@@ -22,3 +22,75 @@
   name: httproute/default/httproute-1/rule/0
   perConnectionBufferLimitBytes: 32768
   type: EDS
+- circuitBreakers:
+    thresholds:
+    - maxRetries: 1024
+  commonLbConfig: {}
+  connectTimeout: 10s
+  dnsLookupFamily: V4_PREFERRED
+  edsClusterConfig:
+    edsConfig:
+      ads: {}
+      resourceApiVersion: V3
+    serviceName: httproute/default/httproute-2/rule/0
+  ignoreHealthOnHostRemoval: true
+  lbPolicy: LEAST_REQUEST
+  loadBalancingPolicy:
+    policies:
+    - typedExtensionConfig:
+        name: envoy.load_balancing_policies.least_request
+        typedConfig:
+          '@type': type.googleapis.com/envoy.extensions.load_balancing_policies.least_request.v3.LeastRequest
+          localityLbConfig:
+            localityWeightedLbConfig: {}
+  name: httproute/default/httproute-2/rule/0
+  perConnectionBufferLimitBytes: 32768
+  type: EDS
+- circuitBreakers:
+    thresholds:
+    - maxRetries: 1024
+  commonLbConfig: {}
+  connectTimeout: 10s
+  dnsLookupFamily: V4_PREFERRED
+  edsClusterConfig:
+    edsConfig:
+      ads: {}
+      resourceApiVersion: V3
+    serviceName: httproute/default/httproute-3/rule/0
+  ignoreHealthOnHostRemoval: true
+  lbPolicy: LEAST_REQUEST
+  loadBalancingPolicy:
+    policies:
+    - typedExtensionConfig:
+        name: envoy.load_balancing_policies.least_request
+        typedConfig:
+          '@type': type.googleapis.com/envoy.extensions.load_balancing_policies.least_request.v3.LeastRequest
+          localityLbConfig:
+            localityWeightedLbConfig: {}
+  name: httproute/default/httproute-3/rule/0
+  perConnectionBufferLimitBytes: 32768
+  type: EDS
+- circuitBreakers:
+    thresholds:
+    - maxRetries: 1024
+  commonLbConfig: {}
+  connectTimeout: 10s
+  dnsLookupFamily: V4_PREFERRED
+  edsClusterConfig:
+    edsConfig:
+      ads: {}
+      resourceApiVersion: V3
+    serviceName: httproute/default/httproute-4/rule/0
+  ignoreHealthOnHostRemoval: true
+  lbPolicy: LEAST_REQUEST
+  loadBalancingPolicy:
+    policies:
+    - typedExtensionConfig:
+        name: envoy.load_balancing_policies.least_request
+        typedConfig:
+          '@type': type.googleapis.com/envoy.extensions.load_balancing_policies.least_request.v3.LeastRequest
+          localityLbConfig:
+            localityWeightedLbConfig: {}
+  name: httproute/default/httproute-4/rule/0
+  perConnectionBufferLimitBytes: 32768
+  type: EDS

internal/xds/translator/testdata/out/xds-ir/http3.endpoints.yaml

@@ -10,3 +10,39 @@
     loadBalancingWeight: 1
     locality:
       region: httproute/default/httproute-1/rule/0/backend/0
+- clusterName: httproute/default/httproute-2/rule/0
+  endpoints:
+  - lbEndpoints:
+    - endpoint:
+        address:
+          socketAddress:
+            address: 8.8.8.8
+            portValue: 8080
+      loadBalancingWeight: 1
+    loadBalancingWeight: 1
+    locality:
+      region: httproute/default/httproute-2/rule/0/backend/0
+- clusterName: httproute/default/httproute-3/rule/0
+  endpoints:
+  - lbEndpoints:
+    - endpoint:
+        address:
+          socketAddress:
+            address: 7.7.7.7
+            portValue: 8080
+      loadBalancingWeight: 1
+    loadBalancingWeight: 1
+    locality:
+      region: httproute/default/httproute-3/rule/0/backend/0
+- clusterName: httproute/default/httproute-4/rule/0
+  endpoints:
+  - lbEndpoints:
+    - endpoint:
+        address:
+          socketAddress:
+            address: 8.8.8.8
+            portValue: 8080
+      loadBalancingWeight: 1
+    loadBalancingWeight: 1
+    locality:
+      region: httproute/default/httproute-4/rule/0/backend/0