94 lines
3.4 KiB
C
94 lines
3.4 KiB
C
/****************************************************************************
|
|
* net/devif/devif_forward.c
|
|
*
|
|
* Copyright (C) 2017 Gregory Nutt. All rights reserved.
|
|
* Author: Gregory Nutt <gnutt@nuttx.org>
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. The name of the author may not be used to endorse or promote
|
|
* products derived from this software without specific prior
|
|
* written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
|
|
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
|
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
|
|
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
|
|
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
|
|
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
|
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
|
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#include <string.h>
|
|
#include <assert.h>
|
|
#include <debug.h>
|
|
|
|
#include <nuttx/net/netdev.h>
|
|
|
|
#include "ipforward/ip_forward.h"
|
|
#include "devif/devif.h"
|
|
|
|
#if defined(CONFIG_NET_IPFORWARD) && defined(CONFIG_NETDEV_MULTINIC)
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: devif_forward
|
|
*
|
|
* Description:
|
|
* Called from protocol-specific IP forwarding logic to re-send a packet.
|
|
*
|
|
* Input Parameters:
|
|
* fwd - An initialized instance of the common forwarding structure that
|
|
* includes everything needed to perform the forwarding operation.
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
* Assumptions:
|
|
* The network is locked.
|
|
*
|
|
****************************************************************************/
|
|
|
|
void devif_forward(FAR struct forward_s *fwd)
|
|
{
|
|
unsigned int offset;
|
|
int ret;
|
|
|
|
DEBUGASSERT(fwd != NULL && fwd->f_iob != NULL && fwd->f_dev != NULL);
|
|
offset = NET_LL_HDRLEN(fwd->f_dev);
|
|
|
|
/* Copy the IOB chain that contains the L3L3 headers and any data payload */
|
|
|
|
DEBUGASSERT(offset + fwd->f_iob->io_pktlen <= NET_DEV_MTU(fwd->f_dev));
|
|
ret = iob_copyout(&fwd->f_dev->d_buf[offset], fwd->f_iob,
|
|
fwd->f_iob->io_pktlen, 0);
|
|
|
|
DEBUGASSERT(ret == fwd->f_iob->io_pktlen);
|
|
offset += fwd->f_iob->io_pktlen;
|
|
|
|
fwd->f_dev->d_sndlen = offset;
|
|
}
|
|
|
|
#endif /* CONFIG_NET_IPFORWARD && CONFIG_NETDEV_MULTINIC */
|