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114 lines (97 loc) · 3.35 KB
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/****************************************************************************
* net/netdev/netdev_input.c
*
* SPDX-License-Identifier: Apache-2.0
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <nuttx/net/netdev.h>
#include "utils/utils.h"
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: netdev_input
*
* Description:
* This function will copy the flat buffer that does not support
* Scatter/gather to the iob vector buffer.
*
* Compatible with all old flat buffer NICs:
*
* [tcp|udp|icmp|...]ipv[4|6]_data_handler()
* | (iob_concat/append to readahead)
* |
* pkt/ipv[4/6]_in()/...
* |
* |
* netdev_input() // new interface, Scatter/gather flat/iobs
* |
* |
* pkt/ipv[4|6]_input()/...
* |
* |
* NICs io vector receive(Original flat buffer)
*
* Input Parameters:
* NULL
*
* Returned Value:
* Pointer to default network driver on success; null on failure
*
****************************************************************************/
int netdev_input(FAR struct net_driver_s *dev,
devif_poll_callback_t callback, bool reply)
{
uint16_t llhdrlen = NET_LL_HDRLEN(dev);
FAR uint8_t *buf = dev->d_buf;
int ret;
/* Prepare iob buffer */
ret = netdev_iob_prepare(dev, false, 0);
if (ret != OK)
{
return ret;
}
#if defined(CONFIG_NET_TIMESTAMP)
if ((dev->d_features & NETDEV_RX_STAMP) != 0)
{
dev->d_iob->io_time = dev->d_rxtime;
}
#endif
/* Copy data to iob entry */
ret = iob_trycopyin(dev->d_iob, buf, dev->d_len, -llhdrlen, false);
if (ret == dev->d_len)
{
/* Update device buffer to l2 start */
dev->d_buf = NETLLBUF;
ret = callback(dev);
if (dev->d_iob != NULL && reply)
{
if (ret == OK && dev->d_len > 0)
{
iob_copyout(buf, dev->d_iob, dev->d_len, -llhdrlen);
}
}
}
netdev_iob_release(dev);
dev->d_buf = buf;
return ret;
}