请大家用c语言完成一个基于socket网络编程的信息收发程序。要求如下: 1单机同时模拟完成服务器端和客户端的功能即可; 2功能要求客户端发一条消息,服务器端收到对应得消息
时间: 2024-02-06 15:10:24 浏览: 26
以下是一个简单的基于socket网络编程的信息收发程序的示例,使用C语言编写。
服务器端代码:
```
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <unistd.h>
#define PORT 8888
#define BUFFER_SIZE 1024
int main() {
int server_fd, new_socket, valread;
struct sockaddr_in address;
int opt = 1;
int addrlen = sizeof(address);
char buffer[BUFFER_SIZE] = {0};
char *hello = "Hello from server";
// 创建socket文件描述符
if ((server_fd = socket(AF_INET, SOCK_STREAM, 0)) == 0) {
perror("socket failed");
exit(EXIT_FAILURE);
}
// 设置socket选项
if (setsockopt(server_fd, SOL_SOCKET, SO_REUSEADDR | SO_REUSEPORT, &opt, sizeof(opt))) {
perror("setsockopt failed");
exit(EXIT_FAILURE);
}
// 绑定socket到指定端口
address.sin_family = AF_INET;
address.sin_addr.s_addr = INADDR_ANY;
address.sin_port = htons(PORT);
if (bind(server_fd, (struct sockaddr *)&address, sizeof(address)) < 0) {
perror("bind failed");
exit(EXIT_FAILURE);
}
// 监听连接请求
if (listen(server_fd, 3) < 0) {
perror("listen failed");
exit(EXIT_FAILURE);
}
// 接受连接请求并处理
if ((new_socket = accept(server_fd, (struct sockaddr *)&address, (socklen_t*)&addrlen)) < 0) {
perror("accept failed");
exit(EXIT_FAILURE);
}
// 从客户端接收消息
valread = read(new_socket, buffer, BUFFER_SIZE);
printf("Received message: %s\n", buffer);
// 向客户端发送消息
send(new_socket, hello, strlen(hello), 0);
printf("Hello message sent\n");
// 关闭socket连接
close(new_socket);
close(server_fd);
return 0;
}
```
客户端代码:
```
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <unistd.h>
#define PORT 8888
#define BUFFER_SIZE 1024
int main(int argc, char const *argv[]) {
int sock = 0, valread;
struct sockaddr_in serv_addr;
char buffer[BUFFER_SIZE] = {0};
char *hello = "Hello from client";
// 创建socket文件描述符
if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
printf("\n Socket creation error \n");
return -1;
}
// 设置服务器地址和端口
serv_addr.sin_family = AF_INET;
serv_addr.sin_port = htons(PORT);
// 将IPv4地址从点分十进制转换为二进制格式
if (inet_pton(AF_INET, "127.0.0.1", &serv_addr.sin_addr) <= 0) {
printf("\nInvalid address/ Address not supported \n");
return -1;
}
// 连接服务器
if (connect(sock, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) < 0) {
printf("\nConnection Failed \n");
return -1;
}
// 向服务器发送消息
send(sock, hello, strlen(hello), 0);
printf("Hello message sent\n");
// 从服务器接收消息
valread = read(sock, buffer, BUFFER_SIZE);
printf("Received message: %s\n", buffer);
// 关闭socket连接
close(sock);
return 0;
}
```
运行该程序,服务器端将等待客户端连接并接收客户端发送的消息,然后向客户端发送一条回复消息。客户端将连接到服务器并发送一条消息,然后等待从服务器接收回复消息。
注意:在运行该程序之前,需要先启动服务器端,然后再启动客户端。