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/****************************************************************************
* net/netdev_register.c
*
* Copyright (C) 2007, 2008 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* 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>
#if defined(CONFIG_NET) && CONFIG_NSOCKET_DESCRIPTORS > 0
#include <sys/types.h>
#include <sys/socket.h>
#include <stdio.h>
#include <semaphore.h>
#include <assert.h>
#include <string.h>
#include <errno.h>
#include <debug.h>
#include <net/if.h>
#include <net/ethernet.h>
#include <net/uip/uip-arch.h>
#include "net_internal.h"
/****************************************************************************
* Definitions
****************************************************************************/
/****************************************************************************
* Priviate Types
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
static int g_next_devnum = 0;
/****************************************************************************
* Public Data
****************************************************************************/
/* List of registered ethernet device drivers */
struct uip_driver_s *g_netdevices = NULL;
sem_t g_netdev_sem;
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Global Functions
****************************************************************************/
/****************************************************************************
* Function: netdev_semtake
*
* Description:
* Managed access to the network device list
*
****************************************************************************/
void netdev_semtake(void)
{
/* Take the semaphore (perhaps waiting) */
while (sem_wait(&g_netdev_sem) != 0)
{
/* The only case that an error should occr here is if
* the wait was awakened by a signal.
*/
ASSERT(*get_errno_ptr() == EINTR);
}
}
/****************************************************************************
* Function: netdev_register
*
* Description:
* Register a netword device driver and assign a name to it so tht it can
* be found in subsequent network ioctl operations on the device.
*
* Parameters:
* dev - The device driver structure to register
*
* Returned Value:
* 0:Success; -1 on failure
*
* Assumptions:
* Called during system initialization from normal user mode
*
****************************************************************************/
int netdev_register(FAR struct uip_driver_s *dev)
{
if (dev)
{
int devnum;
netdev_semtake();
/* Assign a device name to the interface */
devnum = g_next_devnum++;
snprintf( dev->d_ifname, IFNAMSIZ, "eth%d", devnum );
/* Add the device to the list of known network devices */
dev->flink = g_netdevices;
g_netdevices = dev;
netdev_semgive();
nlldbg("Registered MAC: %02x:%02x:%02x:%02x:%02x:%02x as dev: %s\n",
dev->d_mac.ether_addr_octet[0], dev->d_mac.ether_addr_octet[1],
dev->d_mac.ether_addr_octet[2], dev->d_mac.ether_addr_octet[3],
dev->d_mac.ether_addr_octet[4], dev->d_mac.ether_addr_octet[5],
dev->d_ifname);
return OK;
}
return -EINVAL;
}
#endif /* CONFIG_NET && CONFIG_NSOCKET_DESCRIPTORS */
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