编程接收广播怎么弄

时间:2025-01-23 18:59:36 游戏攻略

在编程中接收广播消息的方法取决于你使用的编程语言和网络协议。以下是几种常见编程语言中接收广播消息的示例:

C语言

在C语言中,可以使用UDP套接字来实现广播消息的接收。以下是一个简单的示例代码:

```c

include

include

include

include

include

include

define BUF_SIZE 512

int main(int argc, char *argv[]) {

int sockfd;

struct sockaddr_in servaddr, cliaddr;

char buf[BUF_SIZE];

int strLen;

if (argc != 2) {

printf("Usage: %s \n", argv);

exit(1);

}

sockfd = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP);

if (sockfd < 0) {

perror("socket");

exit(1);

}

memset(&servaddr, 0, sizeof(servaddr));

servaddr.sin_family = AF_INET;

servaddr.sin_addr.s_addr = htonl(INADDR_ANY);

servaddr.sin_port = htons(atoi(argv));

if (setsockopt(sockfd, SOL_SOCKET, SO_BROADCAST, (char *)&broadcast_enable, sizeof(broadcast_enable)) < 0) {

perror("setsockopt");

exit(1);

}

while (1) {

strLen = recvfrom(sockfd, buf, BUF_SIZE, 0, (struct sockaddr *)&cliaddr, (socklen_t *)&cliaddr_size);

if (strLen < 0) {

perror("recvfrom");

exit(1);

}

printf("Received: %s\n", buf);

}

close(sockfd);

return 0;

}

```

Python

在Python中,可以使用`socket`模块来实现广播消息的接收。以下是一个简单的示例代码:

```python

import socket

HOST = '255.255.255.255' 广播地址

PORT = 12345 广播端口

sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)

sock.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)

while True:

data, addr = sock.recvfrom(1024) 接收数据

print(f"Received: {data} from {addr}")

```

Java

在Java中,可以使用`DatagramSocket`类来实现广播消息的接收。以下是一个简单的示例代码:

```java

import java.io.IOException;

import java.net.DatagramPacket;

import java.net.DatagramSocket;

import java.net.InetAddress;

public class BroadcastReceiver {

public static void main(String[] args) {

try (DatagramSocket socket = new DatagramSocket(12345)) {

socket.setBroadcast(true);

byte[] buffer = new byte;

DatagramPacket packet = new DatagramPacket(buffer, buffer.length);

while (true) {

socket.receive(packet);

String received = new String(packet.getData(), 0, packet.getLength());

System.out.println("Received: " + received);

}

} catch (IOException e) {

e.printStackTrace();

}

}

}

```

JavaScript (Node.js)

在Node.js中,可以使用`dgram`模块来实现广播消息的接收。以下是一个简单的示例代码:

```javascript

const dgram = require('dgram');

const server = dgram.createSocket('udp4');

server.on('message', (msg, rinfo) => {

console.log(`Received: ${msg} from ${rinfo.address}:${rinfo.port}`);

});

server.setBroadcast(true);

server.send('Hello, world!', '255.255.255.255', 12345);

```

Android

在Android中