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#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <ipxe/refcnt.h>
#include <ipxe/process.h>
#include <ipxe/xfer.h>
#include <ipxe/open.h>
/** @file
*
* "Hello World" data source
*
*/
struct hw {
struct refcnt refcnt;
struct interface xfer;
struct process process;
};
static const char hw_msg[] = "Hello world!\n";
static void hw_finished ( struct hw *hw, int rc ) {
intf_shutdown ( &hw->xfer, rc );
process_del ( &hw->process );
}
static void hw_step ( struct hw *hw ) {
int rc;
if ( xfer_window ( &hw->xfer ) ) {
rc = xfer_deliver_raw ( &hw->xfer, hw_msg, sizeof ( hw_msg ) );
hw_finished ( hw, rc );
}
}
static struct interface_operation hw_xfer_operations[] = {
INTF_OP ( xfer_window_changed, struct hw *, hw_step ),
INTF_OP ( intf_close, struct hw *, hw_finished ),
};
static struct interface_descriptor hw_xfer_desc =
INTF_DESC ( struct hw, xfer, hw_xfer_operations );
static struct process_descriptor hw_process_desc =
PROC_DESC_ONCE ( struct hw, process, hw_step );
static int hw_open ( struct interface *xfer, struct uri *uri __unused ) {
struct hw *hw;
/* Allocate and initialise structure */
hw = zalloc ( sizeof ( *hw ) );
if ( ! hw )
return -ENOMEM;
ref_init ( &hw->refcnt, NULL );
intf_init ( &hw->xfer, &hw_xfer_desc, &hw->refcnt );
process_init ( &hw->process, &hw_process_desc, &hw->refcnt );
/* Attach parent interface, mortalise self, and return */
intf_plug_plug ( &hw->xfer, xfer );
ref_put ( &hw->refcnt );
return 0;
}
struct uri_opener hw_uri_opener __uri_opener = {
.scheme = "hw",
.open = hw_open,
};
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