/****************************************************************************
* up_uipdriver.c
*
* Copyright (C) 2007 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* Based on code from uIP which also has a BSD-like license:
*
* Copyright (c) 2001, 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. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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
* COPYRIGHT OWNER OR CONTRIBUTORS 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>
#include <sys/types.h>
#include <net/uip/uip.h>
#include <net/uip/uip-arch.h>
#include <net/uip/uip-arp.h>
#include "up_internal.h"
/****************************************************************************
* Private Definitions
****************************************************************************/
#define BUF ((struct uip_eth_hdr *)&uip_buf[0])
/****************************************************************************
* Private Types
****************************************************************************/
struct timer
{
uint32 interval;
uint32 start;
};
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
static struct timer periodic_timer;
static struct timer arp_timer;
/****************************************************************************
* Private Functions
****************************************************************************/
static void timer_set( struct timer *t, unsigned int interval )
{
t->interval = interval;
t->start = up_getwalltime();
}
static boolean timer_expired( struct timer *t )
{
return (up_getwalltime() - t->start) >= t->interval;
}
void timer_reset(struct timer *t)
{
t->start += t->interval;
}
/****************************************************************************
* Public Functions
****************************************************************************/
void uipdriver_loop(void)
{
int i;
uip_len = tapdev_read((char*)uip_buf, UIP_BUFSIZE);
if (uip_len > 0)
{
if (BUF->type == htons(UIP_ETHTYPE_IP))
{
uip_arp_ipin();
uip_input();
/* If the above function invocation resulted in data that
* should be sent out on the network, the global variable
* uip_len is set to a value > 0.
*/
if (uip_len > 0)
{
uip_arp_out();
tapdev_send((char*)uip_buf, uip_len);
}
}
else if (BUF->type == htons(UIP_ETHTYPE_ARP))
{
uip_arp_arpin();
/* If the above function invocation resulted in data that
* should be sent out on the network, the global variable
* uip_len is set to a value > 0.
*/
if (uip_len > 0)
{
tapdev_send((char*)uip_buf, uip_len);
}
}
}
else if (timer_expired(&periodic_timer))
{
timer_reset(&periodic_timer);
for(i = 0; i < UIP_CONNS; i++)
{
uip_periodic(i);
/* If the above function invocation resulted in data that
* should be sent out on the network, the global variable
* uip_len is set to a value > 0.
*/
if (uip_len > 0)
{
uip_arp_out();
tapdev_send((char*)uip_buf, uip_len);
}
}
#ifdef CONFIG_NET_UDP
for(i = 0; i < UIP_UDP_CONNS; i++)
{
uip_udp_periodic(i);
/* If the above function invocation resulted in data that
* should be sent out on the network, the global variable
* uip_len is set to a value > 0.
*/
if (uip_len > 0)
{
uip_arp_out();
tapdev_send((char*)uip_buf, uip_len);
}
}
#endif /* CONFIG_NET_UDP */
/* Call the ARP timer function every 10 seconds. */
if (timer_expired(&arp_timer))
{
timer_reset(&arp_timer);
uip_arp_timer();
}
}
}
int uipdriver_init(void)
{
timer_set(&periodic_timer, 500);
timer_set(&arp_timer, 10000 );
tapdev_init();
uip_init();
return OK;
}