75 lines
2.3 KiB
C
75 lines
2.3 KiB
C
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/****************************************************************************
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* net/utils/net_iob_concat.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 <sys/types.h>
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#include <nuttx/mm/iob.h>
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#ifdef CONFIG_MM_IOB
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: net_iob_concat
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*
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* Description:
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* Concatenate iob_s chain iob2 to iob1, if CONFIG_NET_RECV_PACK is
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* endabled, pack all data in the I/O buffer chain.
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*
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* Returned Value:
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* The number of bytes actually buffered is returned. This will be either
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* zero or equal to iob->io_pktlen.
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*
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****************************************************************************/
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uint16_t net_iob_concat(FAR struct iob_s **iob1, FAR struct iob_s **iob2)
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{
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if (*iob1 == NULL)
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{
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*iob1 = *iob2;
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}
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else
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{
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iob_concat(*iob1, *iob2);
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}
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*iob2 = NULL;
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#ifdef CONFIG_NET_RECV_PACK
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/* Merge an iob chain into a continuous space, thereby reducing iob
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* consumption.
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*/
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*iob1 = iob_pack(*iob1);
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#endif
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return (*iob1)->io_pktlen;
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}
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#endif /* CONFIG_MM_IOB */
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