HarmonyOS socket 绑定IP问题？

Question

在tcp socket 连接中，需要 bind() 来绑定自己的IP，如何可以获取到自己的IP , 如果不绑定是不是没法收到message 消息

Answer 1

获取ip可以参考 https://developer.huawei.com/consumer/cn/doc/harmonyos-references-V5/js-apis-net-connection-V5

使用connection.getAddressesByName

tcp可以参考

import { socket } from '@kit.NetworkKit';
import { BusinessError } from '@kit.BasicServicesKit';

// 创建一个TCPSocketServer连接，返回一个TCPSocketServer对象。
let tcpServer: socket.TCPSocketServer = socket.constructTCPSocketServerInstance();
// 绑定本地IP地址和端口，进行监听

let ipAddress : socket.NetAddress = {} as socket.NetAddress;
ipAddress.address = "192.168.xxx.xxx";
ipAddress.port = 4651;
tcpServer.listen(ipAddress).then(() => {
  console.log('listen success');
}).catch((err: BusinessError) => {
  console.log('listen fail');
});

class SocketInfo {
  message: ArrayBuffer = new ArrayBuffer(1);
  remoteInfo: socket.SocketRemoteInfo = {} as socket.SocketRemoteInfo;
}
// 订阅TCPSocketServer的connect事件
tcpServer.on("connect", (client: socket.TCPSocketConnection) => {
  // 订阅TCPSocketConnection相关的事件
  client.on("close", () => {
    console.log("on close success");
  });
  client.on("message", (value: SocketInfo) => {
    let buffer = value.message;
    let dataView = new DataView(buffer);
    let str = "";
    for (let i = 0; i < dataView.byteLength; ++i) {
      str += String.fromCharCode(dataView.getUint8(i));
    }
    console.log("received message--:" + str);
    console.log("received address--:" + value.remoteInfo.address);
    console.log("received family--:" + value.remoteInfo.family);
    console.log("received port--:" + value.remoteInfo.port);
    console.log("received size--:" + value.remoteInfo.size);
  });

  // 向客户端发送数据
  let tcpSendOptions : socket.TCPSendOptions = {} as socket.TCPSendOptions;
  tcpSendOptions.data = 'Hello, client!';
  client.send(tcpSendOptions).then(() => {
    console.log('send success');
  }).catch((err: Object) => {
    console.error('send fail: ' + JSON.stringify(err));
  });

  // 关闭与客户端的连接
  client.close().then(() => {
    console.log('close success');
  }).catch((err: BusinessError) => {
    console.log('close fail');
  });

  // 取消TCPSocketConnection相关的事件订阅
  setTimeout(() => {
    client.off("message");
    client.off("close");
  }, 10 * 1000);
});

// 取消TCPSocketServer相关的事件订阅
setTimeout(() => {
  tcpServer.off("connect");
}, 30 * 1000);