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  1. /*
  2.  * Copyright (c) 2009 Lukas Mejdrech
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. /** @addtogroup netif
  30.  *  @{
  31.  */
  32.  
  33. /** @file
  34.  *  Network interface module skeleton.
  35.  *  The skeleton has to be part of each network interface module.
  36.  *  The skeleton can be also part of the module bundled with the network interface layer.
  37.  */
  38.  
  39. #ifndef __NET_NETIF_H__
  40. #define __NET_NETIF_H__
  41.  
  42. #include <async.h>
  43. #include <fibril_sync.h>
  44.  
  45. #include <ipc/ipc.h>
  46.  
  47. #include "../err.h"
  48.  
  49. #include "../include/device.h"
  50.  
  51. #include "../structures/packet/packet.h"
  52.  
  53. /** Network interface module skeleton global data.
  54.  */
  55. typedef struct netif_globals    netif_globals_t;
  56.  
  57. /** Type definition of the device specific data.
  58.  *  @see netif_device
  59.  */
  60. typedef struct netif_device device_t;
  61.  
  62. /** Type definition of the device specific data pointer.
  63.  *  @see netif_device
  64.  */
  65. typedef device_t *          device_ref;
  66.  
  67. /** Device map.
  68.  *  Maps device identifiers to the network interface device specific data.
  69.  *  @see device.h
  70.  */
  71. DEVICE_MAP_DECLARE( device_map, device_t );
  72.  
  73. /** Network interface device specific data.
  74.  */
  75. struct  netif_device{
  76.     /** Device identifier.
  77.      */
  78.     device_id_t device_id;
  79.     /** Receiving network interface layer phone.
  80.      */
  81.     int     nil_phone;
  82.     /** Actual device state.
  83.      */
  84.     device_state_t  state;
  85.     /** Driver specific data.
  86.      */
  87.     void *      specific;
  88. };
  89.  
  90. /** Network interface module skeleton global data.
  91.  */
  92. struct  netif_globals{
  93.     /** Networking module phone.
  94.      */
  95.     int     net_phone;
  96.     /** Device map.
  97.      */
  98.     device_map_t    device_map;
  99.     /** Safety lock.
  100.      */
  101.     fibril_rwlock_t lock;
  102. };
  103.  
  104. /** Finds the device specific data.
  105.  *  @param device_id The device identifier. Input parameter.
  106.  *  @param device The device specific data. Output parameter.
  107.  *  @returns EOK on success.
  108.  *  @returns ENOENT if device is not found.
  109.  *  @returns EPERM if the device is not initialized.
  110.  */
  111. int find_device( device_id_t device_id, device_ref * device );
  112.  
  113. /** Clears the usage statistics.
  114.  *  @param stats The usage statistics. Input parameter.
  115.  */
  116. void    null_device_stats( device_stats_ref stats );
  117.  
  118. // prepared for future optimalizations
  119. /** Releases the given packet.
  120.  *  @param packet_id The packet identifier. Input parameter.
  121.  */
  122. void    netif_pq_release( packet_id_t packet_id );
  123.  
  124. /** Allocates new packet to handle the given content size.
  125.  *  @param content The minimum content size. Input parameter.
  126.  *  @returns The allocated packet.
  127.  *  @returns NULL if there is an error.
  128.  */
  129. packet_t netif_packet_get_1( size_t content );
  130.  
  131. /** Processes the netif module messages.
  132.  *  @param callid The message identifier. Input parameter.
  133.  *  @param call The message parameters. Input parameter.
  134.  *  @param answer The message answer parameters. Output parameter.
  135.  *  @param answer_count The last parameter for the actual answer in the answer parameter. Output parameter.
  136.  *  @returns EOK on success.
  137.  *  @returns ENOTSUP if the message is not known.
  138.  *  @returns Other error codes as defined for each specific module message function.
  139.  *  @see netif_interface.h
  140.  *  @see IS_NET_NETIF_MESSAGE()
  141.  */
  142. int netif_message( ipc_callid_t callid, ipc_call_t * call, ipc_call_t * answer, int * answer_count );
  143.  
  144. /** Initializes the netif module.
  145.  *  The function has to be defined in each module.
  146.  *  @param client_connection The client connection functio to be registered. Input parameter.
  147.  *  @returns EOK on success.
  148.  *  @returns Other error codes as defined for each specific module message function.
  149.  */
  150. int netif_init_module( async_client_conn_t client_connection );
  151.  
  152. /** Starts and maintains the netif module until terminated.
  153.  *  @returns EOK after the module is terminated.
  154.  */
  155. int netif_run_module( void );
  156.  
  157. #endif
  158.  
  159. /** @}
  160.  */
  161.  
  162.