- #include
- #include
- #include
- #include
- #include
- #include
-
- #define PORT 8080
- #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
- 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);
- }
- address.sin_family = AF_INET;
- address.sin_addr.s_addr = INADDR_ANY;
- address.sin_port = htons(PORT);
-
- // 绑定地址和端口
- if (bind(server_fd, (struct sockaddr *)&address, sizeof(address))<0) {
- perror("bind failed");
- exit(EXIT_FAILURE);
- }
-
- // 监听连接
- if (listen(server_fd, 3) < 0) {
- perror("listen failed");
- exit(EXIT_FAILURE);
- }
-
- // 接受连接并处理请求
- if ((new_socket = accept(server_fd, (struct sockaddr *)&address, (socklen_t*)&addrlen))<0) {
- perror("accept failed");
- exit(EXIT_FAILURE);
- }
-
- // 读取客户端发来的消息
- valread = read(new_socket, buffer, BUFFER_SIZE);
- printf("%s\n",buffer);
-
- // 向客户端发送消息
- send(new_socket , hello , strlen(hello) , 0);
- printf("Hello message sent\n");
-
- return 0;
- }
创建了一个简单的服务器,监听8080端口,并接受客户端的连接。一旦建立连接,服务器将读取客户端发送的消息,并向客户端发送消息。
gcc ./server.c -o server
./server
- #include
- #include
- #include
- #include
- #include
- #include
-
- #define MAX_BUFFER_SIZE 1024
-
- int main() {
- int sock;
- struct sockaddr_in server_addr;
- char buffer[MAX_BUFFER_SIZE];
-
- // 创建套接字
- sock = socket(AF_INET, SOCK_STREAM, 0);
- if (sock == -1) {
- perror("socket");
- exit(EXIT_FAILURE);
- }
-
- // 设置服务器地址信息
- server_addr.sin_family = AF_INET;
- server_addr.sin_port = htons(8080); // 服务器端口
- server_addr.sin_addr.s_addr = inet_addr("127.0.0.1"); // 服务器IP地址
-
- // 连接服务器
- if (connect(sock, (struct sockaddr *)&server_addr, sizeof(server_addr)) == -1) {
- perror("connect");
- exit(EXIT_FAILURE);
- }
-
- // 发送数据到服务器
- char *message = "Hello, server!";
- if (send(sock, message, strlen(message), 0) == -1) {
- perror("send");
- exit(EXIT_FAILURE);
- }
-
- // 接收服务器的响应
- memset(buffer, 0, sizeof(buffer));
- if (recv(sock, buffer, sizeof(buffer) - 1, 0) == -1) {
- perror("recv");
- exit(EXIT_FAILURE);
- }
-
- printf("Server response: %s\n", buffer);
-
- // 关闭套接字
- close(sock);
-
- return 0;
- }
创建了一个套接字,然后设置服务器的地址信息,包括服务器的IP地址和端口号。接下来,我们使用connect
函数来连接服务器。如果连接成功,我们就可以使用send
函数向服务器发送数据,使用recv
函数接收服务器的响应。最后,我们关闭套接字。
gcc ./client.c -o client
./client