106 lines
3.2 KiB
C
106 lines
3.2 KiB
C
/****************************************************************************
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* net/netdev/netdev_input.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 <nuttx/net/netdev.h>
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#include "utils/utils.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: netdev_input
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*
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* Description:
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* This function will copy the flat buffer that does not support
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* Scatter/gather to the iob vector buffer.
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*
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* Compatible with all old flat buffer NICs:
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*
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* [tcp|udp|icmp|...]ipv[4|6]_data_handler()
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* | (iob_concat/append to readahead)
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* |
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* pkt/ipv[4/6]_in()/...
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* |
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* |
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* netdev_input() // new interface, Scatter/gather flat/iobs
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* |
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* |
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* pkt/ipv[4|6]_input()/...
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* |
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* |
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* NICs io vector receive(Orignal flat buffer)
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*
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* Input Parameters:
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* NULL
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*
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* Returned Value:
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* Pointer to default network driver on success; null on failure
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*
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****************************************************************************/
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int netdev_input(FAR struct net_driver_s *dev,
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devif_poll_callback_t callback, bool reply)
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{
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uint16_t llhdrlen = NET_LL_HDRLEN(dev);
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FAR uint8_t *buf = dev->d_buf;
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int ret;
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/* Prepare iob buffer */
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ret = netdev_iob_prepare(dev, false, 0);
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if (ret != OK)
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{
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return ret;
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}
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/* Copy data to iob entry */
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ret = iob_trycopyin(dev->d_iob, buf, dev->d_len, -llhdrlen, false);
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if (ret == dev->d_len)
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{
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/* Update device buffer to l2 start */
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dev->d_buf = NETLLBUF;
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ret = callback(dev);
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if (dev->d_iob != NULL && reply)
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{
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if (ret == OK && dev->d_len > 0)
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{
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iob_copyout(buf, dev->d_iob, dev->d_len, -llhdrlen);
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}
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}
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}
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netdev_iob_release(dev);
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dev->d_buf = buf;
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return ret;
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}
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