116 lines
3.1 KiB
C
116 lines
3.1 KiB
C
/****************************************************************************
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* net/devif/devif_iobsend.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 <errno.h>
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#include <nuttx/mm/iob.h>
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#include <nuttx/net/netdev.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: devif_iob_send
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*
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* Description:
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* Called from socket logic in response to a xmit or poll request from the
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* the network interface driver.
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*
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* This is identical to calling devif_send() except that the data is
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* in an I/O buffer chain, rather than a flat buffer.
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*
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* Assumptions:
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* Called with the network locked.
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*
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****************************************************************************/
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int devif_iob_send(FAR struct net_driver_s *dev, FAR struct iob_s *iob,
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unsigned int len, unsigned int offset,
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unsigned int target_offset)
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{
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int ret;
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if (dev == NULL)
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{
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ret = -ENODEV;
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goto errout;
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}
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if (len == 0)
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{
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ret = -EINVAL;
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goto errout;
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}
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#ifndef CONFIG_NET_IPFRAG
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if (len > NETDEV_PKTSIZE(dev) - NET_LL_HDRLEN(dev) - target_offset)
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{
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ret = -EMSGSIZE;
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goto errout;
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}
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#endif
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/* Append the send buffer after device buffer */
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if (len > iob_navail(false) * CONFIG_IOB_BUFSIZE)
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{
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ret = -ENOMEM;
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goto errout;
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}
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/* Clone the iob to target device buffer */
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ret = iob_clone_partial(iob, len, offset, dev->d_iob,
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target_offset, false, false);
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if (ret != OK)
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{
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netdev_iob_release(dev);
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goto errout;
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}
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dev->d_sndlen = len;
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#ifdef CONFIG_NET_TCP_WRBUFFER_DUMP
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/* Dump the outgoing device buffer */
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lib_dumpbuffer("devif_iob_send", dev->d_appdata, len);
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#endif
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return dev->d_sndlen;
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errout:
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nerr("ERROR: devif_iob_send error: %d\n", ret);
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return ret;
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}
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#endif /* CONFIG_MM_IOB */
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