84 lines
2.7 KiB
C
84 lines
2.7 KiB
C
/****************************************************************************
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* net/devif/devif_forward.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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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 <= NETDEV_PKTSIZE(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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