11de08de27
Signed-off-by: chao an <anchao@xiaomi.com>
92 lines
2.8 KiB
C
92 lines
2.8 KiB
C
/****************************************************************************
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* net/devif/devif_pktsend.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/net/netdev.h>
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#ifdef CONFIG_NET_PKT
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: devif_pkt_send
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*
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* Description:
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* Called from socket logic in order to send a raw packet in response to
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* an xmit or poll request from the network interface driver.
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*
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* This is almost identical to calling devif_send() except that the data to
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* be sent is copied into dev->d_buf (vs. dev->d_appdata), since there is
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* no header on the data.
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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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void devif_pkt_send(FAR struct net_driver_s *dev, FAR const void *buf,
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unsigned int len)
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{
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unsigned int limit = NETDEV_PKTSIZE(dev) - NET_LL_HDRLEN(dev);
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if (dev == NULL || len == 0 || len > limit)
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{
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nerr("ERROR: devif_pkt_send fail: %p, sndlen: %u, pktlen: %u\n",
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dev, len, limit);
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return;
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}
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iob_update_pktlen(dev->d_iob, 0);
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/* Copy the data into the device packet buffer and set the number of
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* bytes to send
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*/
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if (len <= iob_navail(false) * CONFIG_IOB_BUFSIZE)
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{
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dev->d_sndlen = iob_trycopyin(dev->d_iob, buf, len, 0, false);
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}
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else
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{
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dev->d_sndlen = 0;
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}
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if (dev->d_sndlen != len)
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{
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netdev_iob_release(dev);
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dev->d_sndlen = 0;
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}
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dev->d_len = dev->d_sndlen;
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}
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#endif /* CONFIG_NET_PKT */
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