github.com/envoyproxy/go-control-plane/envoy v1.36.0: v3.SocketAddress_PortValue

Clean-room public code sample — generation instructions

Write a brand-new, minimal, self-contained code sample in this clean-room directory.
Do not copy, paraphrase, or reference any existing project source. Work only from this spec.

A csx.json manifest scaffold already exists. Do not recreate it from memory. Preserve its case.goal, packages and symbols; fill its empty case.contract with exact assertions and correct its environment, commands and verifierAdapter for the files you generate.

Goal: verify github.com/envoyproxy/go-control-plane/envoy/config/core/v3.SocketAddress_PortValue in pkg:golang/github.com/envoyproxy/go-control-plane/envoy@v1.36.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:golang/github.com/envoyproxy/go-control-plane/envoy@v1.36.0
Demonstrate these symbols/APIs:
  - github.com/envoyproxy/go-control-plane/envoy/config/core/v3.SocketAddress_PortValue

Rules:
  - One focused purpose; the smallest project that proves the goal.
  - Include a contract test (test/contract.*) that runs OFFLINE and exits 0 exactly when the goal behavior works.
  - Pin every dependency with a lockfile so resolution is reproducible.
  - No secrets, credentials, or tokens. No real URLs (only example.com or localhost). No absolute paths.
  - No personal names, emails, company names, or project identifiers of any kind.
  - No binaries and no generated output (node_modules, dist, target, venv, .git, .env).
  - Keep it under 200 files and 256KB packed.

{"case":{"caseId":"case:sha256:824a15e34f84d34ff1f825004b9e5876486622825f0cd77eb5cc1ad97fc0ed4c","contract":["SocketAddress_PortValue holds the specified uint32 port number","SocketAddress initializes with SocketAddress_PortValue as PortSpecifier","SocketAddress GetPortValue returns the configured port from SocketAddress_PortValue","SocketAddress GetPortSpecifier returns non-nil *SocketAddress_PortValue","SocketAddress GetPortValue returns 0 when PortSpecifier is nil or not SocketAddress_PortValue"],"goal":"verify github.com/envoyproxy/go-control-plane/envoy/config/core/v3.SocketAddress_PortValue in pkg:golang/github.com/envoyproxy/go-control-plane/envoy@v1.36.0","kind":"HOW","packages":["pkg:golang/github.com/envoyproxy/go-control-plane/envoy@v1.36.0"],"schemaVersion":1,"symbols":["github.com/envoyproxy/go-control-plane/envoy/config/core/v3.SocketAddress_PortValue"]},"contractCommand":["go","run","./test"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"golang","language":"go","libc":"glibc","libcVersion":"2.39","os":"linux","osVersionBucket":"24","packageManager":"go","packageManagerVersion":"1.26.6","runtime":"go","runtimeVersion":"1.26.6","schemaVersion":1},"license":"MIT-0","packages":["pkg:golang/github.com/envoyproxy/go-control-plane/envoy@v1.36.0"],"schemaVersion":1,"subject":"pkg:golang/github.com/envoyproxy/go-control-plane/envoy@v1.36.0","symbols":["github.com/envoyproxy/go-control-plane/envoy/config/core/v3.SocketAddress_PortValue"],"verifierAdapter":"golang@1"}

module sample

go 1.23.0

require github.com/envoyproxy/go-control-plane/envoy v1.36.0

require (
	github.com/cncf/xds/go v0.0.0-20250501225837-2ac532fd4443 // indirect
	github.com/envoyproxy/protoc-gen-validate v1.2.1 // indirect
	github.com/planetscale/vtprotobuf v0.6.1-0.20240319094008-0393e58bdf10 // indirect
	google.golang.org/protobuf v1.36.10 // indirect
)

github.com/cncf/xds/go v0.0.0-20250501225837-2ac532fd4443 h1:aQ3y1lwWyqYPiWZThqv1aFbZMiM9vblcSArJRf2Irls=
github.com/cncf/xds/go v0.0.0-20250501225837-2ac532fd4443/go.mod h1:W+zGtBO5Y1IgJhy4+A9GOqVhqLpfZi+vwmdNXUehLA8=
github.com/envoyproxy/go-control-plane/envoy v1.36.0 h1:yg/JjO5E7ubRyKX3m07GF3reDNEnfOboJ0QySbH736g=
github.com/envoyproxy/go-control-plane/envoy v1.36.0/go.mod h1:ty89S1YCCVruQAm9OtKeEkQLTb+Lkz0k8v9W0Oxsv98=
github.com/envoyproxy/protoc-gen-validate v1.2.1 h1:DEo3O99U8j4hBFwbJfrz9VtgcDfUKS7KJ7spH3d86P8=
github.com/envoyproxy/protoc-gen-validate v1.2.1/go.mod h1:d/C80l/jxXLdfEIhX1W2TmLfsJ31lvEjwamM4DxlWXU=
github.com/google/go-cmp v0.7.0 h1:wk8382ETsv4JYUZwIsn6YpYiWiBsYLSJiTsyBybVuN8=
github.com/google/go-cmp v0.7.0/go.mod h1:pXiqmnSA92OHEEa9HXL2W4E7lf9JzCmGVUdgjX3N/iU=
github.com/planetscale/vtprotobuf v0.6.1-0.20240319094008-0393e58bdf10 h1:GFCKgmp0tecUJ0sJuv4pzYCqS9+RGSn52M3FUwPs+uo=
github.com/planetscale/vtprotobuf v0.6.1-0.20240319094008-0393e58bdf10/go.mod h1:t/avpk3KcrXxUnYOhZhMXJlSEyie6gQbtLq5NM3loB8=
google.golang.org/protobuf v1.36.10 h1:AYd7cD/uASjIL6Q9LiTjz8JLcrh/88q5UObnmY3aOOE=
google.golang.org/protobuf v1.36.10/go.mod h1:HTf+CrKn2C3g5S8VImy6tdcUvCska2kB7j23XfzDpco=

package main

import (
	"fmt"

	corev3 "github.com/envoyproxy/go-control-plane/envoy/config/core/v3"
)

func main() {
	portVal := &corev3.SocketAddress_PortValue{
		PortValue: 8080,
	}

	addr := &corev3.SocketAddress{
		Protocol:      corev3.SocketAddress_TCP,
		Address:       "127.0.0.1",
		PortSpecifier: portVal,
	}

	fmt.Printf("Configured address %s:%d (protocol %s)\n", addr.GetAddress(), addr.GetPortValue(), addr.GetProtocol().String())
}

{
  "schemaVersion": 1,
  "goal": "verify github.com/envoyproxy/go-control-plane/envoy/config/core/v3.SocketAddress_PortValue in pkg:golang/github.com/envoyproxy/go-control-plane/envoy@v1.36.0",
  "kind": "HOW",
  "packages": [
    "pkg:golang/github.com/envoyproxy/go-control-plane/envoy@v1.36.0"
  ],
  "symbols": [
    "github.com/envoyproxy/go-control-plane/envoy/config/core/v3.SocketAddress_PortValue"
  ]
}

package main

import (
	"fmt"
	"os"

	corev3 "github.com/envoyproxy/go-control-plane/envoy/config/core/v3"
)

func main() {
	if err := runContract(); err != nil {
		fmt.Fprintf(os.Stderr, "FAIL: %v\n", err)
		os.Exit(1)
	}
	fmt.Println("PASS: all contract assertions satisfied")
}

func runContract() error {
	// 1. SocketAddress_PortValue holds the specified uint32 port number
	pv := &corev3.SocketAddress_PortValue{
		PortValue: 8080,
	}
	if pv.PortValue != 8080 {
		return fmt.Errorf("expected SocketAddress_PortValue.PortValue to be 8080, got %d", pv.PortValue)
	}

	// 2. SocketAddress initializes with SocketAddress_PortValue as PortSpecifier
	addr := &corev3.SocketAddress{
		Protocol:      corev3.SocketAddress_TCP,
		Address:       "127.0.0.1",
		PortSpecifier: pv,
	}
	if addr.GetAddress() != "127.0.0.1" {
		return fmt.Errorf("expected SocketAddress address '127.0.0.1', got %q", addr.GetAddress())
	}

	// 3. SocketAddress GetPortValue returns the configured port from SocketAddress_PortValue
	if addr.GetPortValue() != 8080 {
		return fmt.Errorf("expected GetPortValue() to return 8080, got %d", addr.GetPortValue())
	}

	// 4. SocketAddress GetPortSpecifier returns non-nil *SocketAddress_PortValue
	spec := addr.GetPortSpecifier()
	portSpec, ok := spec.(*corev3.SocketAddress_PortValue)
	if !ok || portSpec == nil {
		return fmt.Errorf("expected *corev3.SocketAddress_PortValue wrapper, got %T", spec)
	}
	if portSpec.PortValue != 8080 {
		return fmt.Errorf("expected portSpec.PortValue to be 8080, got %d", portSpec.PortValue)
	}

	// 5. SocketAddress GetPortValue returns 0 when PortSpecifier is nil or not SocketAddress_PortValue
	var nilAddr *corev3.SocketAddress
	if nilAddr.GetPortValue() != 0 {
		return fmt.Errorf("expected nil SocketAddress GetPortValue() to be 0, got %d", nilAddr.GetPortValue())
	}

	namedAddr := &corev3.SocketAddress{
		Address: "127.0.0.1",
		PortSpecifier: &corev3.SocketAddress_NamedPort{
			NamedPort: "http",
		},
	}
	if namedAddr.GetPortValue() != 0 {
		return fmt.Errorf("expected named port SocketAddress GetPortValue() to be 0, got %d", namedAddr.GetPortValue())
	}

	return nil
}