417 lines
13 KiB
C
417 lines
13 KiB
C
/****************************************************************************
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* net/netdev/netdev.h
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*
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* Copyright (C) 2014-2015 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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#ifndef __NET_NETDEV_NETDEV_H
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#define __NET_NETDEV_NETDEV_H
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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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#include <sys/types.h>
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#include <stdbool.h>
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#include <nuttx/net/ip.h>
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/****************************************************************************
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* Public Data
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****************************************************************************/
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#undef EXTERN
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#if defined(__cplusplus)
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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#if CONFIG_NSOCKET_DESCRIPTORS > 0
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/* List of registered Ethernet device drivers. You must have the network
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* locked in order to access this list.
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*
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* NOTE that this duplicates a declaration in net/tcp/tcp.h
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*/
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EXTERN struct net_driver_s *g_netdevices;
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#endif
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/****************************************************************************
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* Public Types
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****************************************************************************/
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/* Callback from netdev_foreach() */
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struct net_driver_s; /* Forward reference */
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typedef int (*netdev_callback_t)(FAR struct net_driver_s *dev, FAR void *arg);
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Name: netdev_ifup / netdev_ifdown
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*
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* Description:
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* Bring the interface up/down
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*
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****************************************************************************/
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void netdev_ifup(FAR struct net_driver_s *dev);
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void netdev_ifdown(FAR struct net_driver_s *dev);
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/****************************************************************************
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* Name: netdev_verify
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*
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* Description:
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* Verify that the specified device still exists
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*
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* Assumptions:
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* The caller has locked the network.
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*
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****************************************************************************/
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bool netdev_verify(FAR struct net_driver_s *dev);
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/****************************************************************************
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* Name: netdev_findbyname
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*
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* Description:
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* Find a previously registered network device using its assigned
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* network interface name
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*
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* Parameters:
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* ifname The interface name of the device of interest
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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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#if CONFIG_NSOCKET_DESCRIPTORS > 0
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FAR struct net_driver_s *netdev_findbyname(FAR const char *ifname);
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#endif
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/****************************************************************************
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* Name: netdev_foreach
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*
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* Description:
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* Enumerate each registered network device.
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*
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* NOTE: netdev semaphore held throughout enumeration.
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*
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* Parameters:
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* callback - Will be called for each registered device
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* arg - User argument passed to callback()
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*
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* Returned Value:
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* 0:Enumeration completed 1:Enumeration terminated early by callback
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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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int netdev_foreach(netdev_callback_t callback, FAR void *arg);
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/****************************************************************************
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* Name: netdev_findby_ipv4addr
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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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* IPv4 address.
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*
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* Parameters:
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* lipaddr - Local, bound address of a connection.
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* ripaddr - Remote address of a connection to use in the lookup
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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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#if CONFIG_NSOCKET_DESCRIPTORS > 0
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#ifdef CONFIG_NET_IPv4
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FAR struct net_driver_s *netdev_findby_ipv4addr(in_addr_t lipaddr,
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in_addr_t ripaddr);
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#endif
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/****************************************************************************
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* Name: netdev_findby_ipv6addr
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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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* IPv6 address.
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*
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* Parameters:
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* lipaddr - Local, bound address of a connection.
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* ripaddr - Remote address of a connection to use in the lookup
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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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#ifdef CONFIG_NET_IPv6
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FAR struct net_driver_s *netdev_findby_ipv6addr(const net_ipv6addr_t lipaddr,
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const net_ipv6addr_t ripaddr);
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#endif
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#endif
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/****************************************************************************
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* Name: netdev_findbyindex
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*
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* Description:
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* Find a previously registered network device by its position in the
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* list of registered devices. NOTE that this function is not a safe way
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* to enumerate network devices: There could be changes to the list of
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* registered device causing a given index to be meaningless (unless, of
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* course, the caller keeps the network locked).
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*
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* Parameters:
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* index - the index of the interface to file
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*
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* Returned Value:
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* Pointer to driver on success; NULL on failure. This function can only
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* fail if there are fewer registered interfaces than could be indexed.
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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 net_driver_s *netdev_findbyindex(int index);
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/****************************************************************************
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* Name: netdev_default
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*
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* Description:
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* Return the default network device. REVISIT: At present this function
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* arbitrarily returns the first UP device at the head of the device
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* list. Perhaps the default device should be a device name
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* configuration option?
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*
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* So why is this here: It represents my current though for what to do
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* if a socket is connected with INADDY_ANY. In this case, I suppose we
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* should use the IP address associated with some default device???
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*
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* Parameters:
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* NULL
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*
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* Returned Value:
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* Pointer to default network 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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#if CONFIG_NSOCKET_DESCRIPTORS > 0
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FAR struct net_driver_s *netdev_default(void);
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#endif
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/****************************************************************************
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* Name: netdev_ipv4_txnotify
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*
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* Description:
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* Notify the device driver that forwards the IPv4 address that new TX
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* data is available.
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*
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* Parameters:
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* lipaddr - The local address bound to the socket
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* ripaddr - The remote address to send the data
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*
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* Returned Value:
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* None
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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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#if CONFIG_NSOCKET_DESCRIPTORS > 0
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#ifdef CONFIG_NET_IPv4
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void netdev_ipv4_txnotify(in_addr_t lipaddr, in_addr_t ripaddr);
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#endif /* CONFIG_NET_IPv4 */
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/****************************************************************************
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* Name: netdev_ipv6_txnotify
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*
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* Description:
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* Notify the device driver that forwards the IPv4 address that new TX
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* data is available.
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*
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* Parameters:
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* lipaddr - The local address bound to the socket
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* ripaddr - The remote address to send the data
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*
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* Returned Value:
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* None
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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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#ifdef CONFIG_NET_IPv6
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void netdev_ipv6_txnotify(FAR const net_ipv6addr_t lipaddr,
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FAR const net_ipv6addr_t ripaddr);
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#endif /* CONFIG_NET_IPv6 */
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#endif /* CONFIG_NSOCKET_DESCRIPTORS > 0 */
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/****************************************************************************
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* Name: netdev_txnotify_dev
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*
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* Description:
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* Notify the device driver that new TX data is available. This variant
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* would be called when the upper level logic already understands how the
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* packet will be routed.
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*
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* Parameters:
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* dev - The network device driver state structure.
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*
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* Returned Value:
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* None
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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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void netdev_txnotify_dev(FAR struct net_driver_s *dev);
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/****************************************************************************
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* Name: netdev_count
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*
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* Description:
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* Return the number of network devices
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*
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* Parameters:
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* None
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*
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* Returned Value:
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* The number of network devices
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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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#if CONFIG_NSOCKET_DESCRIPTORS > 0
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int netdev_count(void);
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#endif
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/****************************************************************************
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* Name: netdev_ipv4_ifconf
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*
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* Description:
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* Return the IPv4 configuration of each network adaptor
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*
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* Parameters:
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* ifc - A reference to the instance of struct ifconf in which to return
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* the information.
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*
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* Returned Value:
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* Zero is returned on success; a negated errno value is returned on any
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* failure.
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*
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* Assumptions:
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* The nework is locked
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*
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****************************************************************************/
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#ifdef CONFIG_NET_IPv4
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struct ifconf; /* Forward reference */
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int netdev_ipv4_ifconf(FAR struct ifconf *ifc);
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#endif
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/****************************************************************************
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* Name: netdev_ipv6_ifconf
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*
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* Description:
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* Return the IPv6 configuration of each network adaptor
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*
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* Parameters:
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* lifc - A reference to the instance of struct lifconf in which to return
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* the information.
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*
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* Returned Value:
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* Zero is returned on success; a negated errno value is returned on any
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* failure.
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*
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* Assumptions:
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* The nework is locked
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*
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****************************************************************************/
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#ifdef CONFIG_NET_IPv6
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struct lifconf; /* Forward reference */
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int netdev_ipv6_ifconf(FAR struct lifconf *lifc);
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#endif
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/****************************************************************************
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* Name: netdev_dev_lladdrsize
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*
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* Description:
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* Returns the size of the MAC address associated with a network device.
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*
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* Parameters:
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* dev - A reference to the device of interest
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*
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* Returned Value:
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* The size of the MAC address associated with this device
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*
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****************************************************************************/
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int netdev_dev_lladdrsize(FAR struct net_driver_s *dev);
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#undef EXTERN
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#ifdef __cplusplus
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}
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#endif
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#endif /* __NET_NETDEV_NETDEV_H */
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