func CheckPortAvailability(host, port string, opts TCPOptions) (err error) {
	lc := &net.ListenConfig{}

	ctx, cancel := context.WithTimeout(context.Background(), time.Second)
	defer cancel()

	l, err := lc.Listen(ctx, "tcp", net.JoinHostPort(host, port))
	if err != nil {
		return err
	}

	// As we are able to listen on this network, the port is not in use.
	// Close the listener and continue check other networks.
	return l.Close()

import java.io.IOException;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.Socket;
import javax.net.SocketFactory;
import jnr.unixsocket.UnixSocketChannel;

/** Impersonate TCP-style SocketFactory over UNIX domain sockets. */
public final class UnixDomainSocketFactory extends SocketFactory {
  private final File path;

  public UnixDomainSocketFactory(File path) {
    this.path = path;
  }

```sh
mc admin config set myminio notify_mqtt:1 broker="tcp://localhost:1883" password="" queue_dir="" queue_limit="0" reconnect_interval="0s"  keep_alive_interval="0s" qos="1" topic="minio" username=""
```

- [ ] Implement RDMA transport layer
- [ ] Add RDMA buffer registration
- [ ] Create RDMA read/write operations
- [ ] Implement RDMA credits management
- [ ] Add fallback to TCP when RDMA unavailable

#### 5.3 Integration Points
- Create new transport type alongside TCP
- Modify negotiation to include RDMA contexts
- Update read/write operations for RDMA

---

### Phase 6: Witness Protocol

}

func TestConnPoolWrapper(t *testing.T) {
	dialect := os.Getenv("GORM_DIALECT")
	if dialect != "mysql" {
		t.SkipNow()
	}

	dbDSN := os.Getenv("GORM_DSN")
	if dbDSN == "" {
		dbDSN = "gorm:gorm@tcp(localhost:9910)/gorm?charset=utf8&parseTime=True&loc=Local"
	}
	nativeDB, err := sql.Open("mysql", dbDSN)
	if err != nil {
		t.Fatalf("Should open db success, but got %v", err)
	}

	conn := &wrapperConnPool{

 *     lookups) and attempt new connections to them. When failures occur, retries iterate the
 *     list of available routes.
 *
 * If the pool gains an eligible connection while DNS, TCP, or TLS work is in flight, this finder
 * will prefer pooled connections. Only pooled HTTP/2 connections are used for such de-duplication.
 *
 * It is possible to cancel the finding process by canceling its call.
 *

			Optional:    true,
			Type:        "duration",
		},
	}

	HelpMQTT = config.HelpKVS{
		config.HelpKV{
			Key:         target.MqttBroker,
			Description: "MQTT server endpoint e.g. `tcp://localhost:1883`",
			Type:        "uri",
			Sensitive:   true,
		},
		config.HelpKV{
			Key:         target.MqttTopic,
			Description: "name of the MQTT topic to publish",
			Type:        "string",
		},

// Store returns any underlying store if set.
func (target *WebhookTarget) Store() event.TargetStore {
	return target.store
}

func (target *WebhookTarget) isActive() (bool, error) {
	conn, err := net.DialTimeout("tcp", target.addr, 5*time.Second)
	if err != nil {
		if xnet.IsNetworkOrHostDown(err, false) {
			return false, store.ErrNotConnected
		}
		return false, err
	}
	defer conn.Close()
	return true, nil
}

     * otherwise values must be between 1 and [Integer.MAX_VALUE] when converted to milliseconds.
     *
     * The connect timeout is applied when connecting a TCP socket to the target host. The default
     * value is 10 seconds.
     */
    fun connectTimeout(
      timeout: Long,
      unit: TimeUnit,
    ) = apply {

Similarly, the reader thread must never block on writing because this can deadlock the connection. Consider a client and server that both violate this rule. If you get unlucky, they could fill up their TCP buffers (so that writes block) and then use their reader threads to write a frame. Nobody is reading on either end, and the buffers are never drained.

#### Do-stuff-later pool