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NET: Move net/netdev*.c to net/netdev/netdev*.c
This commit is contained in:
Gregory Nutt
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/****************************************************************************
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* net/netdev/netdev_findbyaddr.c
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*
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* Copyright (C) 2007-2009, 2014 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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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 <stdbool.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 <nuttx/net/netdev.h>
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#include "net.h"
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#include "netdev/netdev.h"
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#include "route/route.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Private Types
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****************************************************************************/
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/****************************************************************************
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* Public Data
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****************************************************************************/
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Function: netdev_maskcmp
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****************************************************************************/
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/****************************************************************************
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* Function: netdev_finddevice
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*
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* Description:
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* Find a previously registered network device by matching a local address
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* with the subnet served by the device. Only "up" devices are considered
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* (since a "down" device has no meaningful address).
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*
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* Parameters:
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* addr - Pointer to the remote address of a connection
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*
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* Returned Value:
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* Pointer to driver on success; null on failure
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*
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* Assumptions:
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* Called from normal user mode
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*
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****************************************************************************/
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static FAR struct uip_driver_s *netdev_finddevice(const uip_ipaddr_t addr)
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{
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struct uip_driver_s *dev;
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/* Examine each registered network device */
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netdev_semtake();
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for (dev = g_netdevices; dev; dev = dev->flink)
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{
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/* Is the interface in the "up" state? */
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if ((dev->d_flags & IFF_UP) != 0)
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{
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/* Yes.. check for an address match (under the netmask) */
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if (uip_ipaddr_maskcmp(dev->d_ipaddr, addr, dev->d_netmask))
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{
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/* Its a match */
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netdev_semgive();
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return dev;
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}
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}
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}
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/* No device with the matching address found */
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netdev_semgive();
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return NULL;
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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_findbyaddr
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*
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* Description:
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* Find a previously registered network device by matching an arbitrary
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* IP address.
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*
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* Parameters:
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* addr - Pointer to the remote address of a connection
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*
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* Returned Value:
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* Pointer to driver on success; null on failure
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*
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* Assumptions:
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* Called from normal user mode
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*
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****************************************************************************/
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FAR struct uip_driver_s *netdev_findbyaddr(const uip_ipaddr_t addr)
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{
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struct uip_driver_s *dev;
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#ifdef CONFIG_NET_ROUTE
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uip_ipaddr_t router;
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int ret;
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#endif
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/* First, see if the address maps to the a local network */
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dev = netdev_finddevice(addr);
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if (dev)
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{
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return dev;
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}
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/* No.. The address lies on an external network */
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#ifdef CONFIG_NET_ROUTE
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/* If we have a routing table, then perhaps we can find the the local
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* address of a router that can forward packets to the external network.
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*/
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#ifdef CONFIG_NET_IPv6
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ret = net_router(addr, router);
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#else
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ret = net_router(addr, &router);
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#endif
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if (ret >= 0)
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{
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/* Success... try to find the network device associated with the local
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* router address
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*/
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dev = netdev_finddevice(router);
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if (dev)
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{
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return dev;
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}
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}
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#endif /* CONFIG_NET_ROUTE */
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/* The above lookup will fail if the packet is being sent out of our
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* out subnet to a router and there is no routing information.
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*
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* However, if there is only a single, registered network interface, then
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* the decision is pretty easy. Use that device and its default router
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* address.
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*/
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netdev_semtake();
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if (g_netdevices && !g_netdevices->flink)
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{
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dev = g_netdevices;
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}
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netdev_semgive();
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/* If we will did not find the network device, then we might as well fail
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* because we are not configured properly to determine the route to the
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* target.
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*/
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return dev;
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}
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#endif /* CONFIG_NET && CONFIG_NSOCKET_DESCRIPTORS */
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