写一个 c++ socket
时间: 2023-07-30 11:12:09 浏览: 45
以下是一个简单的 C 语言 socket 服务器示例,它接受来自客户端的连接,并向客户端发送“Hello World”消息:
```c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <unistd.h>
#define MAX_CLIENTS 10
#define PORT 8888
int main(int argc, char *argv[]) {
int server_fd, client_fd, max_clients = MAX_CLIENTS;
struct sockaddr_in server_addr, client_addr;
char message[] = "Hello World!";
// 创建套接字
if ((server_fd = socket(AF_INET, SOCK_STREAM, 0)) == 0) {
perror("socket failed");
exit(EXIT_FAILURE);
}
// 设置服务器地址
server_addr.sin_family = AF_INET;
server_addr.sin_addr.s_addr = INADDR_ANY;
server_addr.sin_port = htons(PORT);
// 绑定套接字到服务器地址
if (bind(server_fd, (struct sockaddr *)&server_addr, sizeof(server_addr)) < 0) {
perror("bind failed");
exit(EXIT_FAILURE);
}
// 监听客户端连接
if (listen(server_fd, max_clients) < 0) {
perror("listen failed");
exit(EXIT_FAILURE);
}
printf("Server listening on port %d\n", PORT);
// 循环接受客户端连接
while (1) {
int addr_len = sizeof(client_addr);
// 接受客户端连接
if ((client_fd = accept(server_fd, (struct sockaddr *)&client_addr, (socklen_t *)&addr_len)) < 0) {
perror("accept failed");
exit(EXIT_FAILURE);
}
printf("New client connected: %s:%d\n", inet_ntoa(client_addr.sin_addr), ntohs(client_addr.sin_port));
// 向客户端发送消息
if (write(client_fd, message, strlen(message)) != strlen(message)) {
perror("write failed");
exit(EXIT_FAILURE);
}
// 关闭客户端连接
close(client_fd);
}
return 0;
}
```
注意:此示例为了简化代码,省略了错误处理和安全检查。在实际应用中,需要进行更严格的错误处理和安全检查。