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Add concept of transfer metadata, to be used by UDP in order to

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implement sendto()/recvfrom() equivalents.
This commit is contained in:
Michael Brown
2007-06-11 15:04:39 +01:00
parent 77e575235d
commit 95adce0ce1
6 changed files with 54 additions and 13 deletions
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21
src/include/gpxe/xfer.h
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@@ -13,6 +13,7 @@
#include <gpxe/iobuf.h>
struct xfer_interface;
struct xfer_metadata;
/** Data transfer interface operations */
struct xfer_interface_operations {
@@ -63,10 +64,11 @@ struct xfer_interface_operations {
*/
struct io_buffer * ( * alloc_iob ) ( struct xfer_interface *xfer,
size_t len );
/** Deliver datagram as I/O buffer
/** Deliver datagram as I/O buffer with metadata
*
* @v xfer Data transfer interface
* @v iobuf Datagram I/O buffer
* @v meta Data transfer metadata, or NULL
* @ret rc Return status code
*
* A data transfer interface that wishes to support only raw
@@ -78,7 +80,8 @@ struct xfer_interface_operations {
* fatal error.
*/
int ( * deliver_iob ) ( struct xfer_interface *xfer,
struct io_buffer *iobuf );
struct io_buffer *iobuf,
struct xfer_metadata *meta );
/** Deliver datagram as raw data
*
* @v xfer Data transfer interface
@@ -106,6 +109,14 @@ struct xfer_interface {
struct xfer_interface_operations *op;
};
/** Data transfer metadata */
struct xfer_metadata {
/** Source socket address, or NULL */
struct sockaddr *src;
/** Destination socket address, or NULL */
struct sockaddr *dest;
};
/** Basis positions for seek() events */
enum seek_whence {
SEEK_SET = 0,
@@ -141,6 +152,9 @@ extern struct io_buffer * xfer_alloc_iob ( struct xfer_interface *xfer,
size_t len );
extern int xfer_deliver_iob ( struct xfer_interface *xfer,
struct io_buffer *iobuf );
extern int xfer_deliver_iob_meta ( struct xfer_interface *xfer,
struct io_buffer *iobuf,
struct xfer_metadata *meta );
extern int xfer_deliver_raw ( struct xfer_interface *xfer,
const void *data, size_t len );
extern int xfer_vprintf ( struct xfer_interface *xfer,
@@ -158,7 +172,8 @@ extern int ignore_xfer_seek ( struct xfer_interface *xfer, off_t offset,
extern struct io_buffer * default_xfer_alloc_iob ( struct xfer_interface *xfer,
size_t len );
extern int xfer_deliver_as_raw ( struct xfer_interface *xfer,
struct io_buffer *iobuf );
struct io_buffer *iobuf,
struct xfer_metadata *meta );
extern int xfer_deliver_as_iob ( struct xfer_interface *xfer,
const void *data, size_t len );
extern int ignore_xfer_deliver_raw ( struct xfer_interface *xfer,