254     struct sockaddr_in sockaddr = {};  in server_socket()  local
262     sockaddr.sin_family = AF_INET;  in server_socket()
263     sockaddr.sin_port = htons(0); /* choose random ephemeral port) */  in server_socket()
264     sockaddr.sin_addr.s_addr = 0;  in server_socket()
265     chk_error(bind(fd, (struct sockaddr *)&sockaddr, sizeof(sockaddr)));  in server_socket()
274     struct sockaddr_in sockaddr = {};  in client_socket()  local
278     sockaddr.sin_family = AF_INET;  in client_socket()
279     sockaddr.sin_port = htons(port);  in client_socket()
280     inet_aton("127.0.0.1", &sockaddr.sin_addr);  in client_socket()
281     chk_error(connect(fd, (struct sockaddr *)&sockaddr, sizeof(sockaddr)));  in client_socket()
290     struct sockaddr_in sockaddr;  in test_socket()  local
299     ret = getsockname(server_fd, (struct sockaddr *)&server_addr, &socklen);  in test_socket()
316     len = sizeof(sockaddr);  in test_socket()
317     fd = chk_error(accept(server_fd, (struct sockaddr *)&sockaddr, &len));  in test_socket()