113 lines
3.5 KiB
C
113 lines
3.5 KiB
C
/****************************************************************************
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* net/pkt/pkt_input.c
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* Handling incoming packet input
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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_PKT)
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#include <errno.h>
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#include <debug.h>
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#include <nuttx/net/netdev.h>
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#include <nuttx/net/pkt.h>
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#include "devif/devif.h"
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#include "pkt/pkt.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#define PKTBUF ((FAR struct eth_hdr_s *)dev->d_buf)
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: pkt_input
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*
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* Description:
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* Handle incoming packet input
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*
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* Input Parameters:
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* dev - The device driver structure containing the received packet
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*
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* Returned Value:
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* OK The packet has been processed and can be deleted
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* -EAGAIN There is a matching connection, but could not dispatch the packet
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* yet. Useful when a packet arrives before a recv call is in
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* place.
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*
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* Assumptions:
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* The network is locked.
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*
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****************************************************************************/
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int pkt_input(struct net_driver_s *dev)
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{
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FAR struct pkt_conn_s *conn;
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FAR struct eth_hdr_s *pbuf = PKTBUF;
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int ret = OK;
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conn = pkt_active(pbuf);
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if (conn)
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{
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uint16_t flags;
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/* Setup for the application callback */
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dev->d_appdata = dev->d_buf;
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dev->d_sndlen = 0;
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/* Perform the application callback */
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flags = pkt_callback(dev, conn, PKT_NEWDATA);
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/* If the operation was successful, the PKT_NEWDATA flag is removed
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* and thus the packet can be deleted (OK will be returned).
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*/
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if ((flags & PKT_NEWDATA) != 0)
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{
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/* No.. the packet was not processed now. Return -EAGAIN so
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* that the driver may retry again later. We still need to
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* set d_len to zero so that the driver is aware that there
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* is nothing to be sent.
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*/
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nwarn("WARNING: Packet not processed\n");
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ret = -EAGAIN;
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}
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}
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else
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{
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ninfo("No PKT listener\n");
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}
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return ret;
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}
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#endif /* CONFIG_NET && CONFIG_NET_PKT */
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