FreeBSD上的TCP/IP网络编程实例

本示例代码演示了在FreeBSD操作系统上进行TCP/IP网络编程的实现方式和解决方案。通过这些示例代码，开发人员可以了解如何在FreeBSD上使用套接字接口进行网络编程，实现TCP服务器和客户端的通信。

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>

#define BUFFER_SIZE 1024

int main() {
    int serverSocket, clientSocket;
    struct sockaddr_in serverAddr, clientAddr;
    char buffer[BUFFER_SIZE];

    // 创建服务器套接字
    serverSocket = socket(AF_INET, SOCK_STREAM, 0);
    if (serverSocket == -1) {
        perror("Server socket creation failed");
        exit(1);
    }

    // 设置服务器地址
    serverAddr.sin_family = AF_INET;
    serverAddr.sin_addr.s_addr = htonl(INADDR_ANY);
    serverAddr.sin_port = htons(8080);

    // 绑定服务器地址和端口
    if (bind(serverSocket, (struct sockaddr*)&serverAddr, sizeof(serverAddr)) == -1) {
        perror("Server socket bind failed");
        close(serverSocket);
        exit(1);
    }

    // 监听客户端连接
    if (listen(serverSocket, 5) == -1) {
        perror("Server socket listen failed");
        close(serverSocket);
        exit(1);
    }

    // 等待客户端连接
    socklen_t clientAddrSize = sizeof(clientAddr);
    clientSocket = accept(serverSocket, (struct sockaddr*)&clientAddr, &clientAddrSize);
    if (clientSocket == -1) {
        perror("Server socket accept failed");
        close(serverSocket);
        exit(1);
    }

    // 接收客户端消息并发送回复
    recv(clientSocket, buffer, BUFFER_SIZE, 0);
    printf("Received message from client: %s\n", buffer);
    send(clientSocket, "Server received your message", strlen("Server received your message"), 0);

    // 关闭套接字
    close(clientSocket);
    close(serverSocket);

    return 0;
}

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