8a63d29c6e
Allocate the device buffer only if the protocol really need to send data. not all protocols require the driver to prepare additional iob before sending, especially UDP, each iob reserves l2/l3 header in advance after prepare write buffer, net device could reuse this entry to send directly Signed-off-by: chao an <anchao@xiaomi.com>
78 lines
2.6 KiB
C
78 lines
2.6 KiB
C
/****************************************************************************
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* net/icmp/icmp_poll.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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#if defined(CONFIG_NET) && defined(CONFIG_NET_ICMP) && \
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defined(CONFIG_NET_ICMP_SOCKET)
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#include <debug.h>
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#include <nuttx/net/netconfig.h>
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#include <nuttx/net/netdev.h>
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#include <nuttx/net/icmp.h>
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#include "devif/devif.h"
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#include "icmp/icmp.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: icmp_poll
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*
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* Description:
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* Poll a device "connection" structure for availability of ICMP TX data
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*
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* Input Parameters:
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* dev - The device driver structure to use in the send operation
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* conn - A pointer to the ICMP connection structure
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*
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* Returned Value:
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* None
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*
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* Assumptions:
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* The network is locked.
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* dev is not NULL.
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* conn is not NULL.
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* The connection (conn) is bound to the polling device (dev).
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*
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****************************************************************************/
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void icmp_poll(FAR struct net_driver_s *dev, FAR struct icmp_conn_s *conn)
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{
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DEBUGASSERT(dev != NULL && conn != NULL && dev == conn->dev);
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/* Setup for the application callback */
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dev->d_len = 0;
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dev->d_sndlen = 0;
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/* Perform the application callback */
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devif_conn_event(dev, ICMP_POLL, conn->sconn.list);
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}
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#endif /* CONFIG_NET && CONFIG_NET_ICMP && CONFIG_NET_ICMP_SOCKET */
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