130 lines
4.7 KiB
C
130 lines
4.7 KiB
C
/****************************************************************************
|
|
* net/netdev_findbyaddr.c
|
|
*
|
|
* Copyright (C) 2007-2009 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 <string.h>
|
|
#include <errno.h>
|
|
#include <debug.h>
|
|
|
|
#include <net/uip/uip-arch.h>
|
|
|
|
#include "net_internal.h"
|
|
|
|
/****************************************************************************
|
|
* Definitions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Priviate Types
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Private Data
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Public Data
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Private Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Function: netdev_maskcmp
|
|
****************************************************************************/
|
|
|
|
static inline boolean netdev_maskcmp(const uip_ipaddr_t *ipaddr,
|
|
const uip_ipaddr_t *raddr,
|
|
const uip_ipaddr_t *netmask)
|
|
{
|
|
#ifndef CONFIG_NET_IPv6
|
|
return (*ipaddr & *netmask) == (*raddr & *netmask);
|
|
#else
|
|
# warning "Not implemented for IPv6"
|
|
#endif
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Global Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Function: netdev_findbyaddr
|
|
*
|
|
* Description:
|
|
* Find a previously registered network device by matching a remote address
|
|
* with the subnet served by the device
|
|
*
|
|
* Parameters:
|
|
* raddr - Pointer to the remote address of a connection
|
|
*
|
|
* Returned Value:
|
|
* Pointer to driver on success; null on failure
|
|
*
|
|
* Assumptions:
|
|
* Called from normal user mode
|
|
*
|
|
****************************************************************************/
|
|
|
|
FAR struct uip_driver_s *netdev_findbyaddr(const uip_ipaddr_t *raddr)
|
|
{
|
|
struct uip_driver_s *dev;
|
|
|
|
if (raddr)
|
|
{
|
|
netdev_semtake();
|
|
for (dev = g_netdevices; dev; dev = dev->flink)
|
|
{
|
|
if (netdev_maskcmp(&dev->d_ipaddr, raddr, &dev->d_netmask))
|
|
{
|
|
netdev_semgive();
|
|
return dev;
|
|
}
|
|
}
|
|
netdev_semgive();
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
#endif /* CONFIG_NET && CONFIG_NSOCKET_DESCRIPTORS */
|