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  1. /*
  2.  * Copyright (c) 2008 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 net
  30.  * @{
  31.  */
  32.  
  33. /** @file
  34.  */
  35.  
  36. #include <async.h>
  37. #include <errno.h>
  38. #include <stdio.h>
  39.  
  40. #include <ipc/ipc.h>
  41. #include <ipc/services.h>
  42.  
  43. #include "../err.h"
  44. #include "../measured_strings.h"
  45. #include "../messages.h"
  46. #include "../modules.h"
  47. #include "../packet.h"
  48.  
  49. #include "netif.h"
  50.  
  51. #define DEFAULT_MTU 1500
  52.  
  53. #define NAME    "lo - loopback interface"
  54.  
  55. netif_globals_t netif_globals;
  56.  
  57. int change_state_message( device_id_t device_id, device_state_t state );
  58. int create( device_id_t device_id, device_ref * device );
  59. int initialize( void );
  60. void    netif_print_name( void );
  61. int probe_auto_message( void );
  62. int probe_message( device_id_t device_id, int irq, int io );
  63. int send_message( device_id_t device_id, packet_t packet );
  64. int start_message( device_id_t device_id );
  65. int stop_message( device_id_t device_id );
  66.  
  67. int change_state_message( device_id_t device_id, device_state_t state ){
  68.     ERROR_DECLARE;
  69.  
  70.     device_ref  device;
  71.  
  72.     ERROR_PROPAGATE( find_device( device_id, & device ));
  73.     if( device->state != state ){
  74.         device->state = state;
  75.         nil_message( device, NET_NIL_DEVICE_STATE, device->state, NULL, NULL, NULL, NULL );
  76.     }
  77.     return EOK;
  78. }
  79.  
  80. int create( device_id_t device_id, device_ref * device ){
  81.     ERROR_DECLARE;
  82.  
  83.     if( device_map_count( & netif_globals.device_map ) > 0 ){
  84.         return EXDEV;
  85.     }else{
  86.         * device = ( device_ref ) malloc( sizeof( device_t ));
  87.         if( !( * device )) return ENOMEM;
  88.         ( ** device ).device_id = device_id;
  89.         ( ** device ).nil_phone = -1;
  90.         ( ** device ).specific = NULL;
  91.         null_device_stats( &(( ** device ).stats ));
  92.         ( ** device ).state = NETIF_STOPPED;
  93.         ( ** device ).flags = NULL;
  94.         ( ** device ).mtu = DEFAULT_MTU;
  95.         if( ERROR_OCCURED( device_map_add( & netif_globals.device_map, ( ** device ).device_id, * device ))){
  96.             free( * device );
  97.             * device = NULL;
  98.             return ERROR_CODE;
  99.         }
  100.     }
  101.     return EOK;
  102. }
  103.  
  104. int initialize( void ){
  105.     ipcarg_t    phonehash;
  106.  
  107.     return REGISTER_ME( SERVICE_LO, & phonehash );
  108. }
  109.  
  110. void netif_print_name( void ){
  111.     printf( NAME );
  112. }
  113.  
  114. int probe_auto_message( void ){
  115. /*  ERROR_DECLARE;
  116.  
  117.     device_ref  device;
  118.  
  119.     ERROR_PROPAGATE( create( arg1, & device ));
  120.     ipc_call_sync_3_3( netif_globals.networking_phone, NET_NET_DEVICE, device->device_id, NULL, NULL, NULL, NULL, NULL );
  121. */  return ENOTSUP;
  122. }
  123.  
  124. int probe_message( device_id_t device_id, int irq, int io ){
  125.     ERROR_DECLARE;
  126.  
  127.     device_ref      device;
  128.     aid_t           message;
  129.     ipc_call_t      answer;
  130.     measured_string_t   configuration[ 1 ] = {{ "MTU", 3 }};
  131.     int         count = 1;
  132.     measured_string_ref settings;
  133.     char *          data;
  134.  
  135.     // create a new device
  136.     ERROR_PROPAGATE( create( device_id, & device ));
  137.     // get configuration
  138.     message = async_send_2( netif_globals.networking_phone, NET_NET_GET_DEVICE_CONF, device->device_id, count, & answer );
  139.     // send names and get settings
  140.     if( ERROR_OCCURED( measured_strings_send( netif_globals.networking_phone, configuration, count ))
  141.     || ERROR_OCCURED( measured_strings_return( netif_globals.networking_phone, & settings, & data, count ))){
  142.         async_wait_for( message, NULL );
  143.         return ERROR_CODE;
  144.     }
  145.     // MTU is the first one
  146.     if( settings && ( settings[ 0 ].value )){
  147.         device->mtu = strtoul( settings[ 0 ].value, NULL, 0 );
  148.     }else{
  149.         device->mtu = DEFAULT_MTU;
  150.     }
  151.     // print the settings
  152.     printf("\n -MTU =\t%d", device->mtu );
  153.     free( settings );
  154.     free( data );
  155.     // end request
  156.     async_wait_for( message, NULL );
  157.     return EOK;
  158. }
  159.  
  160. int send_message( device_id_t device_id, packet_t packet ){
  161.     ERROR_DECLARE;
  162.  
  163.     device_ref  device;
  164.     size_t      length;
  165.     aid_t       message;
  166.     ipc_call_t  answer;
  167.     ipcarg_t    result;
  168.     packet_t    received;
  169.  
  170.     ERROR_PROPAGATE( find_device( device_id, & device ));
  171.     if( device->state != NETIF_ACTIVE ) return EPERM;
  172.     ++ device->stats.tx_packets;
  173.     ++ device->stats.rx_packets;
  174.     length = packet_get_data_length( packet );
  175.     device->stats.tx_bytes += length;
  176.     device->stats.rx_bytes += length;
  177.     received = packet_copy( packet );
  178.     packet_destroy( packet );
  179.     if( ! received ){
  180.         ++ device->stats.rx_dropped;
  181.         return EOK;
  182.     }
  183.     message = async_send_1( device->nil_phone, NET_NIL_RECEIVED, ( device_id ), & answer );
  184.     if( ERROR_OCCURED( packet_send( received, device->nil_phone ))){
  185.         ++ device->stats.rx_dropped;
  186.     }
  187.     async_wait_for( message, & result );
  188.     if( result != EOK ) ++ device->stats.rx_dropped;
  189.     return EOK;
  190. }
  191.  
  192. int start_message( device_id_t device_id ){
  193.     return change_state_message( device_id, NETIF_ACTIVE );
  194. }
  195.  
  196. int stop_message( device_id_t device_id ){
  197.     return change_state_message( device_id, NETIF_STOPPED );
  198. }
  199.  
  200. /** @}
  201.  */
  202.