forked from Archive/PX4-Autopilot
172 lines
5.7 KiB
C
172 lines
5.7 KiB
C
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/****************************************************************************
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* net/netdev_register.c
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*
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* Copyright (C) 2007-2011 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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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) && CONFIG_NSOCKET_DESCRIPTORS > 0
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#include <sys/socket.h>
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#include <stdio.h>
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#include <semaphore.h>
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#include <assert.h>
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#include <string.h>
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#include <errno.h>
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#include <debug.h>
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#include <net/if.h>
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#include <net/ethernet.h>
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#include <net/uip/uip-arch.h>
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#include "net_internal.h"
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/****************************************************************************
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* Definitions
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****************************************************************************/
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#ifdef CONFIG_NET_SLIP
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# define NETDEV_FORMAT "sl%d"
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#else
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# define NETDEV_FORMAT "eth%d"
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#endif
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/****************************************************************************
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* Priviate Types
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****************************************************************************/
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/****************************************************************************
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* Private Data
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****************************************************************************/
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static int g_next_devnum = 0;
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/****************************************************************************
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* Public Data
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****************************************************************************/
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/* List of registered ethernet device drivers */
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struct uip_driver_s *g_netdevices = NULL;
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sem_t g_netdev_sem;
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Global Functions
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****************************************************************************/
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/****************************************************************************
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* Function: netdev_semtake
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*
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* Description:
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* Managed access to the network device list
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*
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****************************************************************************/
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void netdev_semtake(void)
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{
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/* Take the semaphore (perhaps waiting) */
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while (uip_lockedwait(&g_netdev_sem) != 0)
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{
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/* The only case that an error should occur here is if
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* the wait was awakened by a signal.
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*/
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ASSERT(*get_errno_ptr() == EINTR);
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}
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}
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/****************************************************************************
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* Function: netdev_register
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*
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* Description:
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* Register a network device driver and assign a name to it so tht it can
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* be found in subsequent network ioctl operations on the device.
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*
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* Parameters:
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* dev - The device driver structure to register
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*
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* Returned Value:
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* 0:Success; negated errno on failure
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*
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* Assumptions:
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* Called during system initialization from normal user mode
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*
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****************************************************************************/
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int netdev_register(FAR struct uip_driver_s *dev)
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{
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if (dev)
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{
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int devnum;
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netdev_semtake();
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/* Assign a device name to the interface */
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devnum = g_next_devnum++;
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snprintf(dev->d_ifname, IFNAMSIZ, NETDEV_FORMAT, devnum );
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/* Add the device to the list of known network devices */
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dev->flink = g_netdevices;
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g_netdevices = dev;
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/* Configure the device for IGMP support */
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#ifdef CONFIG_NET_IGMP
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uip_igmpdevinit(dev);
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#endif
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netdev_semgive();
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#ifdef CONFIG_NET_ETHERNET
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nlldbg("Registered MAC: %02x:%02x:%02x:%02x:%02x:%02x as dev: %s\n",
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dev->d_mac.ether_addr_octet[0], dev->d_mac.ether_addr_octet[1],
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dev->d_mac.ether_addr_octet[2], dev->d_mac.ether_addr_octet[3],
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dev->d_mac.ether_addr_octet[4], dev->d_mac.ether_addr_octet[5],
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dev->d_ifname);
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#else
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nlldbg("Registered dev: %s\n", dev->d_ifname);
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#endif
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return OK;
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}
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return -EINVAL;
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}
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#endif /* CONFIG_NET && CONFIG_NSOCKET_DESCRIPTORS */
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