76 lines
1.7 KiB
C
76 lines
1.7 KiB
C
#include <stddef.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <ipxe/refcnt.h>
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#include <ipxe/process.h>
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#include <ipxe/xfer.h>
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#include <ipxe/open.h>
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/** @file
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*
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* "Hello World" data source
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*
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*/
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struct hw {
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struct refcnt refcnt;
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struct xfer_interface xfer;
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struct process process;
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};
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static const char hw_msg[] = "Hello world!\n";
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static void hw_finished ( struct hw *hw, int rc ) {
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xfer_nullify ( &hw->xfer );
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xfer_close ( &hw->xfer, rc );
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process_del ( &hw->process );
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}
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static void hw_xfer_close ( struct xfer_interface *xfer, int rc ) {
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struct hw *hw = container_of ( xfer, struct hw, xfer );
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hw_finished ( hw, rc );
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}
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static struct xfer_interface_operations hw_xfer_operations = {
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.close = hw_xfer_close,
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.vredirect = ignore_xfer_vredirect,
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.window = unlimited_xfer_window,
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.alloc_iob = default_xfer_alloc_iob,
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.deliver_iob = xfer_deliver_as_raw,
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.deliver_raw = ignore_xfer_deliver_raw,
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};
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static void hw_step ( struct process *process ) {
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struct hw *hw = container_of ( process, struct hw, process );
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int rc;
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if ( xfer_window ( &hw->xfer ) ) {
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rc = xfer_deliver_raw ( &hw->xfer, hw_msg, sizeof ( hw_msg ) );
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hw_finished ( hw, rc );
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}
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}
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static int hw_open ( struct xfer_interface *xfer, struct uri *uri __unused ) {
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struct hw *hw;
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/* Allocate and initialise structure */
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hw = zalloc ( sizeof ( *hw ) );
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if ( ! hw )
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return -ENOMEM;
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ref_init ( &hw->refcnt, NULL );
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xfer_init ( &hw->xfer, &hw_xfer_operations, &hw->refcnt );
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process_init ( &hw->process, hw_step, &hw->refcnt );
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/* Attach parent interface, mortalise self, and return */
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xfer_plug_plug ( &hw->xfer, xfer );
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ref_put ( &hw->refcnt );
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return 0;
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}
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struct uri_opener hw_uri_opener __uri_opener = {
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.scheme = "hw",
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.open = hw_open,
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};
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