Unmaintained example code is probably worse than useless.

src/include/gpxe/hello.h

@@ -1,52 +0,0 @@
-#ifndef _GPXE_HELLO_H
-#define _GPXE_HELLO_H
-
-/** @file
- *
- * "Hello world" TCP protocol
- *
- */
-
-#include <stdint.h>
-#include <gpxe/tcp.h>
-#include <gpxe/async.h>
-
-enum hello_state {
-	HELLO_SENDING_MESSAGE = 1,
-	HELLO_SENDING_ENDL,
-};
-
-/**
- * A "hello world" request
- *
- */
-struct hello_request {
-	/** Server to connect to */
-	struct sockaddr_tcpip server;
-	/** Message to be transmitted */
-	const char *message;
-	/** Callback function
-	 *
-	 * @v data	Received data
-	 * @v len	Length of received data
-	 *
-	 * This function is called for all data received from the
-	 * remote server.
-	 */
-	void ( *callback ) ( char *data, size_t len );
-
-	/** Current state */
-	enum hello_state state;
-	/** Amount of message remaining to be transmitted */
-	size_t remaining;
-
-	/** TCP application for this request */
-	struct tcp_application tcp;
-
-	/** Asynchronous operation */
-	struct async async;
-};
-
-extern struct async_operation * say_hello ( struct hello_request *hello );
-
-#endif