HarmonyOS TLSSocket发送消息报错

TLS socket单向认证。建立连接后发送数据控制台 [tls_socket.cpp 1195] write failed, return, err: 5错误。

建立连接代码如下：

public async connect() {
  if (this.isConnected) {
    return
  }

  let ipAddress : socket.NetAddress = {} as socket.NetAddress
  ipAddress.address = this.server
  ipAddress.port = this.port
  let options: socket.TLSConnectOptions = {
    address: {
      address: this.server,
      port: this.port,
      family: 1
    },
    secureOptions: {

    },
    ALPNProtocols: ["spdy/1", "http/1.1"]
  }

  let localAddress: socket.NetAddress = { address: "0.0.0.0", family: 1 }
  await this.socket.bind(localAddress)
  this.socket.on('message', async (value) => {
  })

  this.socket.connect(options, (err: BusinessError) => {
    if (err) {
      Logger.debug("socket connect failed: " + JSON.stringify(err), "socket")
      return
    }
    Logger.debug("socket did connect", "socket")
  })
}

问题：

1. bind方法是必须调用的吗，localAddress是本地真实IP，还是0.0.0.0就可以？
2. 客户端单向认证服务端，只验证服务端证书是否系统根证书授信，TLSConnectOptions要如何传递呢，这种情况secureOptions传空可以吗？

有完整的tlssocket调用示例吗