69 lines
1.5 KiB
C
69 lines
1.5 KiB
C
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#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 <gpxe/refcnt.h>
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#include <gpxe/xfer.h>
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#include <gpxe/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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};
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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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ref_put ( &hw->refcnt );
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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 int hw_xfer_request ( struct xfer_interface *xfer, off_t start __unused,
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int whence __unused, size_t len __unused ) {
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struct hw *hw = container_of ( xfer, struct hw, xfer );
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xfer_deliver_raw ( xfer, hw_msg, sizeof ( hw_msg ) );
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hw_finished ( hw, 0 );
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return 0;
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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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.request = hw_xfer_request,
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.seek = ignore_xfer_seek,
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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 int hw_open ( struct xfer_interface *xfer, struct uri *uri __unused ) {
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struct hw *hw;
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hw = malloc ( sizeof ( *hw ) );
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if ( ! hw )
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return -ENOMEM;
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memset ( hw, 0, sizeof ( *hw ) );
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xfer_init ( &hw->xfer, &hw_xfer_operations, &hw->refcnt );
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xfer_plug_plug ( &hw->xfer, xfer );
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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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