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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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27
src/core/xfer.c
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@@ -174,20 +174,23 @@ struct io_buffer * xfer_alloc_iob ( struct xfer_interface *xfer, size_t len ) {
}
/**
* Deliver datagram
* 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
*/
int xfer_deliver_iob ( struct xfer_interface *xfer, struct io_buffer *iobuf ) {
int xfer_deliver_iob_meta ( struct xfer_interface *xfer,
struct io_buffer *iobuf,
struct xfer_metadata *meta ) {
struct xfer_interface *dest = xfer_get_dest ( xfer );
int rc;
DBGC ( xfer, "XFER %p->%p deliver_iob %zd\n", xfer, dest,
iob_len ( iobuf ) );
rc = dest->op->deliver_iob ( dest, iobuf );
rc = dest->op->deliver_iob ( dest, iobuf, meta );
if ( rc != 0 ) {
DBGC ( xfer, "XFER %p<-%p deliver_iob: %s\n", xfer, dest,
@@ -197,6 +200,18 @@ int xfer_deliver_iob ( struct xfer_interface *xfer, struct io_buffer *iobuf ) {
return rc;
}
/**
* Deliver datagram as I/O buffer with metadata
*
* @v xfer Data transfer interface
* @v iobuf Datagram I/O buffer
* @ret rc Return status code
*/
int xfer_deliver_iob ( struct xfer_interface *xfer,
struct io_buffer *iobuf ) {
return xfer_deliver_iob_meta ( xfer, iobuf, NULL );
}
/**
* Deliver datagram as raw data
*
@@ -341,13 +356,15 @@ default_xfer_alloc_iob ( struct xfer_interface *xfer __unused, size_t len ) {
*
* @v xfer Data transfer interface
* @v iobuf Datagram I/O buffer
* @v meta Data transfer metadata
* @ret rc Return status code
*
* This function is intended to be used as the deliver() method for
* data transfer interfaces that prefer to handle raw data.
*/
int xfer_deliver_as_raw ( struct xfer_interface *xfer,
struct io_buffer *iobuf ) {
struct io_buffer *iobuf,
struct xfer_metadata *meta __unused ) {
int rc;
rc = xfer->op->deliver_raw ( xfer, iobuf->data, iob_len ( iobuf ) );
@@ -375,7 +392,7 @@ int xfer_deliver_as_iob ( struct xfer_interface *xfer,
return -ENOMEM;
memcpy ( iob_put ( iobuf, len ), data, len );
return xfer->op->deliver_iob ( xfer, iobuf );
return xfer->op->deliver_iob ( xfer, iobuf, NULL );
}
/**