/**
* Deliver datagram
*
* @v intf Data transfer interface
* @v iobuf Datagram I/O buffer
* @v meta Data transfer metadata
* @ret rc Return status code
*/
int xfer_deliver ( struct interface *intf,
struct io_buffer *iobuf,
struct xfer_metadata *meta ) {
struct interface *dest;
xfer_deliver_TYPE ( void * ) *op =
intf_get_dest_op ( intf, xfer_deliver, &dest );
void *object = intf_object ( dest );
int rc;
DBGC ( INTF_COL ( intf ), "INTF " INTF_INTF_FMT " deliver %zd\n",
INTF_INTF_DBG ( intf, dest ), iob_len ( iobuf ) );
if ( op ) {
rc = op ( object, iobuf, meta );
} else {
/* Default is to discard the I/O buffer */
free_iob ( iobuf );
rc = -EPIPE;
}
if ( rc != 0 ) {
DBGC ( INTF_COL ( intf ), "INTF " INTF_INTF_FMT
" deliver failed: %s\n",
INTF_INTF_DBG ( intf, dest ), strerror ( rc ) );
}
intf_put ( dest );
return rc;
}
/**
* Allocate I/O buffer
*
* @v intf Data transfer interface
* @v len I/O buffer payload length
* @ret iobuf I/O buffer
*/
struct io_buffer * xfer_alloc_iob ( struct interface *intf, size_t len ) {
struct interface *dest;
xfer_alloc_iob_TYPE ( void * ) *op =
intf_get_dest_op ( intf, xfer_alloc_iob, &dest );
void *object = intf_object ( dest );
struct io_buffer *iobuf;
DBGC ( INTF_COL ( intf ), "INTF " INTF_INTF_FMT " alloc_iob %zd\n",
INTF_INTF_DBG ( intf, dest ), len );
if ( op ) {
iobuf = op ( object, len );
} else {
/* Default is to allocate an I/O buffer with no
* reserved space.
*/
iobuf = alloc_iob ( len );
}
if ( ! iobuf ) {
DBGC ( INTF_COL ( intf ), "INTF " INTF_INTF_FMT " alloc_iob "
"failed\n", INTF_INTF_DBG ( intf, dest ) );
}
intf_put ( dest );
return iobuf;
}
/**
* Plug an object interface into a new destination object interface
*
* @v intf Object interface
* @v dest New destination object interface
*
* The reference to the existing destination interface is dropped, a
* reference to the new destination interface is obtained, and the
* interface is updated to point to the new destination interface.
*
* Note that there is no "unplug" call; instead you must plug the
* interface into a null interface.
*/
void intf_plug ( struct interface *intf, struct interface *dest ) {
DBGC ( INTF_COL ( intf ),
"INTF " INTF_INTF_FMT " replug to " INTF_FMT "\n",
INTF_INTF_DBG ( intf, intf->dest ), INTF_DBG ( dest ) );
intf_get ( dest );
intf_put ( intf->dest );
intf->dest = dest;
}
/**
* Send redirection event
*
* @v intf Data transfer interface
* @v type New location type
* @v args Remaining arguments depend upon location type
* @ret rc Return status code
*/
int xfer_vredirect ( struct interface *intf, int type, va_list args ) {
struct interface tmp = INTF_INIT ( null_intf_desc );
struct interface *dest;
xfer_vredirect_TYPE ( void * ) *op =
intf_get_dest_op_no_passthru ( intf, xfer_vredirect, &dest );
void *object = intf_object ( dest );
int rc;
DBGC ( INTF_COL ( intf ), "INTF " INTF_INTF_FMT " redirect\n",
INTF_INTF_DBG ( intf, dest ) );
if ( op ) {
rc = op ( object, type, args );
} else {
/* Default is to reopen the interface as instructed,
* then send xfer_window_changed() messages to both
* new child and parent interfaces. Since our
* original child interface is likely to be closed and
* unplugged as a result of the call to
* xfer_vreopen(), we create a temporary interface in
* order to be able to send xfer_window_changed() to
* the parent.
*/
intf_plug ( &tmp, dest );
rc = xfer_vreopen ( dest, type, args );
if ( rc == 0 ) {
xfer_window_changed ( dest );
xfer_window_changed ( &tmp );
}
intf_unplug ( &tmp );
}
if ( rc != 0 ) {
DBGC ( INTF_COL ( intf ), "INTF " INTF_INTF_FMT " redirect "
"failed: %s\n", INTF_INTF_DBG ( intf, dest ),
strerror ( rc ) );
}
intf_put ( dest );
return rc;
}
/**
* Name resolved
*
* @v intf Object interface
* @v sa Completed socket address (if successful)
*/
void resolv_done ( struct interface *intf, struct sockaddr *sa ) {
struct interface *dest;
resolv_done_TYPE ( void * ) *op =
intf_get_dest_op ( intf, resolv_done, &dest );
void *object = intf_object ( dest );
DBGC ( INTF_COL ( intf ), "INTF " INTF_INTF_FMT " resolv_done\n",
INTF_INTF_DBG ( intf, dest ) );
if ( op ) {
op ( object, sa );
} else {
/* Default is to ignore resolutions */
}
intf_put ( dest );
}
/**
* Close an object interface
*
* @v intf Object interface
* @v rc Reason for close
*
* Note that this function merely informs the destination object that
* the interface is about to be closed; it doesn't actually disconnect
* the interface. In most cases, you probably want to use
* intf_shutdown() or intf_restart() instead.
*/
void intf_close ( struct interface *intf, int rc ) {
struct interface *dest;
intf_close_TYPE ( void * ) *op =
intf_get_dest_op ( intf, intf_close, &dest );
void *object = intf_object ( dest );
DBGC ( INTF_COL ( intf ), "INTF " INTF_INTF_FMT " close (%s)\n",
INTF_INTF_DBG ( intf, dest ), strerror ( rc ) );
if ( op ) {
op ( object, rc );
} else {
/* Default is to ignore intf_close() */
}
intf_put ( dest );
}
