1 #include <stdio.h> 2 #include <strings.h> //bzero 3 #include <unistd.h> //close 4 #include <sys/socket.h> //socket 5 #include <netinet/in.h> //struct sockaddr_in 6 #include <arpa/inet.h> //inet_addr 7 int main(int argc, char const *argv[]) 8 { 9 // 1.创建套接字 10 int sockfd = socket(AF_INET, SOCK_STREAM, 0); 11 if (sockfd < 0) 12 { 13 perror("socket"); 14 return -1; 15 } 16 // 2.绑定bind 17 struct sockaddr_in my_addr; 18 my_addr.sin_family = AF_INET; 19 my_addr.sin_port = htons(8000); 20 my_addr.sin_addr.s_addr = htonl(INADDR_ANY); // 机器的所有可用IP地址 21 int ret = bind(sockfd, (struct sockaddr *)&my_addr, sizeof(my_addr)); 22 if (ret != 0) 23 { 24 perror("bind"); 25 return -1; 26 } 27 // 3.监听 28 int backlog = 10; 29 ret = listen(sockfd, backlog); 30 if (ret < 0) 31 { 32 perror("listen"); 33 return -1; 34 } 35 // 4.提取，等待一个客户端连接 36 struct sockaddr_in cli_addr; 37 socklen_t len = sizeof(cli_addr); 38 int sockfd_new = accept(sockfd, (struct sockaddr *)&cli_addr, &len); 39 if (sockfd_new < 0) 40 { 41 perror("accept"); 42 return -1; 43 } 44 // 5.接收数据 45 char buf[1024] = ""; 46 char ip[16] = ""; 47 while (1) 48 { 49 bzero(buf, sizeof(buf)); 50 recv(sockfd_new, buf, sizeof(buf), 0); 51 inet_ntop(AF_INET, (void *)&cli_addr.sin_addr, ip, 16); 52 printf("%s:%hu--->%s\n", ip, ntohs(cli_addr.sin_port), buf); // ip port buf 53 send(sockfd_new, "ok", sizeof("ok"), 0); // 发送消息 54 } 55 // 6.关闭套接字 56 close(sockfd_new); 57 close(sockfd); 58 return 0; 59 }
