44aae623ab
This adds a new ng_device command, NGM_DEVICE_ETHERALIGN, which has no associated args. After the command arrives, the device begins adjusting all packets sent out its hook to have ETHER_ALIGN bytes of padding at the beginning of the packet. The ETHER_ALIGN padding is added only when running on an architecture that requires strict alignment of IP headers (based on the __NO_STRICT_ALIGNMENT macro, which is only #define'd on x86 as of this writing). This also adds ascii <-> binary command translation to ng_device, both for the existing NGM_DEVICE_GET_DEVNAME and the new ETHERALIGN command. This also gives a name to every ng_device node when it is constructed, using the cdev device name (ngd0, ngd1, etc). This makes it easier to address command msgs to the device using ngctl(8). Reviewed by: donner, ray, adrian Differential Revision: https://reviews.freebsd.org/D32905 MFC after: 1 week
53 lines
1.8 KiB
C
53 lines
1.8 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2002 Mark Santcroos <marks@ripe.net>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*
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* $FreeBSD$
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*
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*/
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#ifndef _NETGRAPH_NG_DEVICE_H_
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#define _NETGRAPH_NG_DEVICE_H_
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/* Node type name and magic cookie */
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#define NG_DEVICE_NODE_TYPE "device"
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#define NGM_DEVICE_COOKIE 1091129178
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#define NG_DEVICE_DEVNAME "ngd"
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/* Netgraph control messages */
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enum {
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NGM_DEVICE_GET_DEVNAME,
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NGM_DEVICE_ETHERALIGN,
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};
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#if 0
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/* passing ioctl params */
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struct ngd_param_s {
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void * p;
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};
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#endif
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#endif /* _NETGRAPH_NG_DEVICE_H_ */
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