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

[people/holger/gpxe.git] / src / core / xfer.c

diff --git a/src/core/xfer.c b/src/core/xfer.c
index ea5fda3..97fd2a6 100644 (file)
--- a/src/core/xfer.c
+++ b/src/core/xfer.c
@@ -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 );
 }
 
 /**