133 lines
4.5 KiB
C
133 lines
4.5 KiB
C
/****************************************************************************
|
|
* net/pkt/pkt_input.c
|
|
* Handling incoming packet input
|
|
*
|
|
* Copyright (C) 2014 Gregory Nutt. All rights reserved.
|
|
* Author: Gregory Nutt <gnutt@nuttx.org>
|
|
*
|
|
* Adapted for NuttX from logic in uIP which also has a BSD-like license:
|
|
*
|
|
* Original author Adam Dunkels <adam@dunkels.com>
|
|
* Copyright () 2001-2003, Adam Dunkels.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. The name of the author may not be used to endorse or promote
|
|
* products derived from this software without specific prior
|
|
* written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
|
|
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
|
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
|
|
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
|
|
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
|
|
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
|
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
|
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
#if defined(CONFIG_NET) && defined(CONFIG_NET_PKT)
|
|
|
|
#include <debug.h>
|
|
|
|
#include <nuttx/net/netdev.h>
|
|
#include <nuttx/net/arp.h>
|
|
#include <nuttx/net/pkt.h>
|
|
|
|
#include "devif/devif.h"
|
|
#include "pkt/pkt.h"
|
|
|
|
/****************************************************************************
|
|
* Pre-processor Definitions
|
|
****************************************************************************/
|
|
|
|
#define PKTBUF ((struct eth_hdr_s *)&dev->d_buf)
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: pkt_input
|
|
*
|
|
* Description:
|
|
* Handle incoming packet input
|
|
*
|
|
* Parameters:
|
|
* dev - The device driver structure containing the received packet
|
|
*
|
|
* Return:
|
|
* OK The packet has been processed and can be deleted
|
|
* ERROR There is a matching connection, but could not dispatch the packet
|
|
* yet. Currently useful for UDP when a packet arrives before a recv
|
|
* call is in place.
|
|
*
|
|
* Assumptions:
|
|
* Called from the interrupt level or with interrupts disabled.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int pkt_input(struct net_driver_s *dev)
|
|
{
|
|
FAR struct pkt_conn_s *conn;
|
|
FAR struct eth_hdr_s *pbuf = (struct eth_hdr_s *)dev->d_buf;
|
|
int ret = OK;
|
|
|
|
conn = pkt_active(pbuf);
|
|
if (conn)
|
|
{
|
|
uint16_t flags;
|
|
|
|
/* Setup for the application callback */
|
|
|
|
dev->d_appdata = dev->d_buf;
|
|
dev->d_sndlen = 0;
|
|
|
|
/* Perform the application callback */
|
|
|
|
flags = pkt_callback(dev, conn, PKT_NEWDATA);
|
|
|
|
/* If the operation was successful, the PKT_NEWDATA flag is removed
|
|
* and thus the packet can be deleted (OK will be returned).
|
|
*/
|
|
|
|
if ((flags & PKT_NEWDATA) != 0)
|
|
{
|
|
/* No.. the packet was not processed now. Return ERROR so
|
|
* that the driver may retry again later. We still need to
|
|
* set d_len to zero so that the driver is aware that there
|
|
* is nothing to be sent.
|
|
*/
|
|
|
|
nwarn("WARNING: Packet not processed\n");
|
|
//dev->d_len = 0; REVISIT
|
|
ret = ERROR;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
nerr("ERROR: No listener\n");
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
#endif /* CONFIG_NET && CONFIG_NET_PKT */
|