331 lines
9.2 KiB
C
331 lines
9.2 KiB
C
/****************************************************************************
|
|
* arch/sim/src/up_netdriver.c
|
|
*
|
|
* Copyright (C) 2007, 2009-2012, 2015 Gregory Nutt. All rights reserved.
|
|
* Author: Gregory Nutt <gnutt@nuttx.org>
|
|
*
|
|
* 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>
|
|
|
|
#ifdef CONFIG_NET_ETHERNET
|
|
|
|
#include <stdint.h>
|
|
#include <stdbool.h>
|
|
#include <string.h>
|
|
#include <sched.h>
|
|
#include <nuttx/net/net.h>
|
|
|
|
#include <net/ethernet.h>
|
|
#include <nuttx/net/netdev.h>
|
|
#include <nuttx/net/arp.h>
|
|
|
|
#ifdef CONFIG_NET_PKT
|
|
# include <nuttx/net/pkt.h>
|
|
#endif
|
|
|
|
#include "up_internal.h"
|
|
|
|
/****************************************************************************
|
|
* Pre-processor Definitions
|
|
****************************************************************************/
|
|
|
|
#define BUF ((struct eth_hdr_s *)g_sim_dev.d_buf)
|
|
|
|
/****************************************************************************
|
|
* Private Types
|
|
****************************************************************************/
|
|
|
|
struct timer
|
|
{
|
|
uint32_t interval;
|
|
uint32_t start;
|
|
};
|
|
|
|
/****************************************************************************
|
|
* Private Function Prototypes
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Private Data
|
|
****************************************************************************/
|
|
|
|
static struct timer g_periodic_timer;
|
|
static struct net_driver_s g_sim_dev;
|
|
|
|
/****************************************************************************
|
|
* Private Functions
|
|
****************************************************************************/
|
|
|
|
static void timer_set(struct timer *t, unsigned int interval)
|
|
{
|
|
t->interval = interval;
|
|
t->start = up_getwalltime();
|
|
}
|
|
|
|
static bool timer_expired(struct timer *t)
|
|
{
|
|
return (up_getwalltime() - t->start) >= t->interval;
|
|
}
|
|
|
|
void timer_reset(struct timer *t)
|
|
{
|
|
t->start += t->interval;
|
|
}
|
|
|
|
#ifdef CONFIG_NET_PROMISCUOUS
|
|
# define up_comparemac(a,b) (0)
|
|
#else
|
|
static inline int up_comparemac(uint8_t *paddr1, struct ether_addr *paddr2)
|
|
{
|
|
return memcmp(paddr1, paddr2->ether_addr_octet, ETHER_ADDR_LEN);
|
|
}
|
|
#endif
|
|
|
|
static int sim_txpoll(struct net_driver_s *dev)
|
|
{
|
|
/* If the polling resulted in data that should be sent out on the network,
|
|
* the field d_len is set to a value > 0.
|
|
*/
|
|
|
|
if (g_sim_dev.d_len > 0)
|
|
{
|
|
/* Look up the destination MAC address and add it to the Ethernet
|
|
* header.
|
|
*/
|
|
|
|
#ifdef CONFIG_NET_IPv4
|
|
#ifdef CONFIG_NET_IPv6
|
|
if (IFF_IS_IPv4(&g_sim_dev))
|
|
#endif
|
|
{
|
|
arp_out(&g_sim_dev);
|
|
}
|
|
#endif /* CONFIG_NET_IPv4 */
|
|
|
|
#ifdef CONFIG_NET_IPv6
|
|
#ifdef CONFIG_NET_IPv4
|
|
else
|
|
#endif
|
|
{
|
|
neighbor_out(&g_sim_dev);
|
|
}
|
|
#endif /* CONFIG_NET_IPv6 */
|
|
|
|
/* Send the packet */
|
|
|
|
netdev_send(g_sim_dev.d_buf, g_sim_dev.d_len);
|
|
}
|
|
|
|
/* If zero is returned, the polling will continue until all connections have
|
|
* been examined.
|
|
*/
|
|
|
|
return 0;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
void netdriver_loop(void)
|
|
{
|
|
FAR struct eth_hdr_s *eth;
|
|
|
|
/* netdev_read will return 0 on a timeout event and >0 on a data received event */
|
|
|
|
g_sim_dev.d_len = netdev_read((FAR unsigned char *)g_sim_dev.d_buf,
|
|
CONFIG_NET_ETH_MTU);
|
|
|
|
/* Disable preemption through to the following so that it behaves a little more
|
|
* like an interrupt (otherwise, the following logic gets pre-empted an behaves
|
|
* oddly.
|
|
*/
|
|
|
|
sched_lock();
|
|
if (g_sim_dev.d_len > 0)
|
|
{
|
|
/* Data received event. Check for valid Ethernet header with destination == our
|
|
* MAC address
|
|
*/
|
|
|
|
eth = BUF;
|
|
if (g_sim_dev.d_len > ETH_HDRLEN &&
|
|
up_comparemac(eth->dest, &g_sim_dev.d_mac) == 0)
|
|
{
|
|
#ifdef CONFIG_NET_PKT
|
|
/* When packet sockets are enabled, feed the frame into the packet
|
|
* tap.
|
|
*/
|
|
|
|
pkt_input(&g_sim_dev);
|
|
#endif
|
|
|
|
/* We only accept IP packets of the configured type and ARP packets */
|
|
|
|
#ifdef CONFIG_NET_IPv4
|
|
if (eth->type == HTONS(ETHTYPE_IP))
|
|
{
|
|
nllvdbg("IPv4 frame\n");
|
|
|
|
/* Handle ARP on input then give the IPv4 packet to the network
|
|
* layer
|
|
*/
|
|
|
|
arp_ipin(&g_sim_dev);
|
|
ipv4_input(&g_sim_dev);
|
|
|
|
/* If the above function invocation resulted in data that
|
|
* should be sent out on the network, the global variable
|
|
* d_len is set to a value > 0.
|
|
*/
|
|
|
|
if (g_sim_dev.d_len > 0)
|
|
{
|
|
/* Update the Ethernet header with the correct MAC address */
|
|
|
|
#ifdef CONFIG_NET_IPv6
|
|
if (IFF_IS_IPv4(g_sim_dev.d_flags))
|
|
#endif
|
|
{
|
|
arp_out(&g_sim_dev);
|
|
}
|
|
#ifdef CONFIG_NET_IPv6
|
|
else
|
|
{
|
|
neighbor_out(&g_sim_dev);
|
|
}
|
|
#endif
|
|
|
|
/* And send the packet */
|
|
|
|
netdev_send(g_sim_dev.d_buf, g_sim_dev.d_len);
|
|
}
|
|
}
|
|
else
|
|
#endif
|
|
#ifdef CONFIG_NET_IPv6
|
|
if (eth->type == HTONS(ETHTYPE_IP6))
|
|
{
|
|
nllvdbg("Iv6 frame\n");
|
|
|
|
/* Give the IPv6 packet to the network layer */
|
|
|
|
ipv6_input(&g_sim_dev);
|
|
|
|
/* If the above function invocation resulted in data that
|
|
* should be sent out on the network, the global variable
|
|
* d_len is set to a value > 0.
|
|
*/
|
|
|
|
if (g_sim_dev.d_len > 0)
|
|
{
|
|
/* Update the Ethernet header with the correct MAC address */
|
|
|
|
#ifdef CONFIG_NET_IPv4
|
|
if (IFF_IS_IPv4(g_sim_dev.d_flags))
|
|
{
|
|
arp_out(&g_sim_dev);
|
|
}
|
|
else
|
|
#endif
|
|
#ifdef CONFIG_NET_IPv6
|
|
{
|
|
neighbor_out(&g_sim_dev);
|
|
}
|
|
#endif
|
|
|
|
/* And send the packet */
|
|
|
|
netdev_send(g_sim_dev.d_buf, g_sim_dev.d_len);
|
|
}
|
|
}
|
|
else
|
|
#endif
|
|
#ifdef CONFIG_NET_ARP
|
|
if (eth->type == htons(ETHTYPE_ARP))
|
|
{
|
|
arp_arpin(&g_sim_dev);
|
|
|
|
/* If the above function invocation resulted in data that
|
|
* should be sent out on the network, the global variable
|
|
* d_len is set to a value > 0.
|
|
*/
|
|
|
|
if (g_sim_dev.d_len > 0)
|
|
{
|
|
netdev_send(g_sim_dev.d_buf, g_sim_dev.d_len);
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
}
|
|
|
|
/* Otherwise, it must be a timeout event */
|
|
|
|
else if (timer_expired(&g_periodic_timer))
|
|
{
|
|
timer_reset(&g_periodic_timer);
|
|
devif_timer(&g_sim_dev, sim_txpoll, 1);
|
|
}
|
|
sched_unlock();
|
|
}
|
|
|
|
int netdriver_init(void)
|
|
{
|
|
/* Internal initalization */
|
|
|
|
timer_set(&g_periodic_timer, 500);
|
|
netdev_init();
|
|
|
|
/* Register the device with the OS so that socket IOCTLs can be performed */
|
|
|
|
(void)netdev_register(&g_sim_dev, NET_LL_ETHERNET);
|
|
return OK;
|
|
}
|
|
|
|
int netdriver_setmacaddr(unsigned char *macaddr)
|
|
{
|
|
(void)memcpy(g_sim_dev.d_mac.ether_addr_octet, macaddr, IFHWADDRLEN);
|
|
return 0;
|
|
}
|
|
|
|
#endif /* CONFIG_NET_ETHERNET */
|
|
|