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