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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 "../../messages.h"
  45. #include "../../modules.h"
  46.  
  47. #include "../../structures/measured_strings.h"
  48. #include "../../structures/packet/packet.h"
  49.  
  50. #include "../netif.h"
  51.  
  52. #define DEFAULT_MTU 1500
  53.  
  54. #define NAME    "lo - loopback interface"
  55.  
  56. netif_globals_t netif_globals;
  57.  
  58. int change_state_message( device_id_t device_id, device_state_t state );
  59. int create( device_id_t device_id, device_ref * device );
  60. int initialize( void );
  61. void    netif_print_name( void );
  62. int probe_auto_message( void );
  63. int probe_message( device_id_t device_id, int irq, int io );
  64. int send_message( device_id_t device_id, packet_t packet );
  65. int start_message( device_id_t device_id );
  66. int stop_message( device_id_t device_id );
  67.  
  68. int change_state_message( device_id_t device_id, device_state_t state ){
  69.     ERROR_DECLARE;
  70.  
  71.     device_ref  device;
  72.  
  73.     ERROR_PROPAGATE( find_device( device_id, & device ));
  74.     if( device->state != state ){
  75.         device->state = state;
  76.         nil_message( device, NET_NIL_DEVICE_STATE, device->state, NULL, NULL, NULL, NULL );
  77.     }
  78.     return EOK;
  79. }
  80.  
  81. int create( device_id_t device_id, device_ref * device ){
  82.     ERROR_DECLARE;
  83.  
  84.     if( device_map_count( & netif_globals.device_map ) > 0 ){
  85.         return EXDEV;
  86.     }else{
  87.         * device = ( device_ref ) malloc( sizeof( device_t ));
  88.         if( !( * device )) return ENOMEM;
  89.         ( ** device ).device_id = device_id;
  90.         ( ** device ).nil_phone = -1;
  91.         ( ** device ).specific = NULL;
  92.         null_device_stats( &(( ** device ).stats ));
  93.         ( ** device ).state = NETIF_STOPPED;
  94.         ( ** device ).flags = NULL;
  95.         ( ** device ).mtu = DEFAULT_MTU;
  96.         if( ERROR_OCCURED( device_map_add( & netif_globals.device_map, ( ** device ).device_id, * device ))){
  97.             free( * device );
  98.             * device = NULL;
  99.             return ERROR_CODE;
  100.         }
  101.     }
  102.     return EOK;
  103. }
  104.  
  105. int initialize( void ){
  106.     ipcarg_t    phonehash;
  107.  
  108.     return REGISTER_ME( SERVICE_LO, & phonehash );
  109. }
  110.  
  111. void netif_print_name( void ){
  112.     printf( NAME );
  113. }
  114.  
  115. int probe_auto_message( void ){
  116. /*  ERROR_DECLARE;
  117.  
  118.     device_ref  device;
  119.  
  120.     ERROR_PROPAGATE( create( arg1, & device ));
  121.     ipc_call_sync_3_3( netif_globals.networking_phone, NET_NET_DEVICE, device->device_id, NULL, NULL, NULL, NULL, NULL );
  122. */  return ENOTSUP;
  123. }
  124.  
  125. int probe_message( device_id_t device_id, int irq, int io ){
  126.     ERROR_DECLARE;
  127.  
  128.     device_ref      device;
  129.     aid_t           message;
  130.     ipc_call_t      answer;
  131.     measured_string_t   configuration[ 1 ] = {{ "MTU", 3 }};
  132.     int         count = 1;
  133.     measured_string_ref settings;
  134.     char *          data;
  135.  
  136.     // create a new device
  137.     ERROR_PROPAGATE( create( device_id, & device ));
  138.     // get configuration
  139.     message = async_send_2( netif_globals.networking_phone, NET_NET_GET_DEVICE_CONF, device->device_id, count, & answer );
  140.     // send names and get settings
  141.     if( ERROR_OCCURED( measured_strings_send( netif_globals.networking_phone, configuration, count ))
  142.     || ERROR_OCCURED( measured_strings_return( netif_globals.networking_phone, & settings, & data, count ))){
  143.         async_wait_for( message, NULL );
  144.         return ERROR_CODE;
  145.     }
  146.     // MTU is the first one
  147.     if( settings && ( settings[ 0 ].value )){
  148.         device->mtu = strtoul( settings[ 0 ].value, NULL, 0 );
  149.     }else{
  150.         device->mtu = DEFAULT_MTU;
  151.     }
  152.     // print the settings
  153.     printf("\n -MTU =\t%d", device->mtu );
  154.     free( settings );
  155.     free( data );
  156.     // end request
  157.     async_wait_for( message, NULL );
  158.     return EOK;
  159. }
  160.  
  161. int send_message( device_id_t device_id, packet_t packet ){
  162.     ERROR_DECLARE;
  163.  
  164.     device_ref  device;
  165.     size_t      length;
  166.     aid_t       message;
  167.     ipc_call_t  answer;
  168.     ipcarg_t    result;
  169.     packet_t    received;
  170.  
  171.     ERROR_PROPAGATE( find_device( device_id, & device ));
  172.     if( device->state != NETIF_ACTIVE ) return EPERM;
  173.     ++ device->stats.tx_packets;
  174.     ++ device->stats.rx_packets;
  175.     length = packet_get_data_length( packet );
  176.     device->stats.tx_bytes += length;
  177.     device->stats.rx_bytes += length;
  178.     received = packet_copy( packet );
  179.     packet_destroy( packet );
  180.     if( ! received ){
  181.         ++ device->stats.rx_dropped;
  182.         return EOK;
  183.     }
  184.     message = async_send_1( device->nil_phone, NET_NIL_RECEIVED, ( device_id ), & answer );
  185.     if( ERROR_OCCURED( packet_send( received, device->nil_phone ))){
  186.         ++ device->stats.rx_dropped;
  187.     }
  188.     async_wait_for( message, & result );
  189.     if( result != EOK ) ++ device->stats.rx_dropped;
  190.     return EOK;
  191. }
  192.  
  193. int start_message( device_id_t device_id ){
  194.     return change_state_message( device_id, NETIF_ACTIVE );
  195. }
  196.  
  197. int stop_message( device_id_t device_id ){
  198.     return change_state_message( device_id, NETIF_STOPPED );
  199. }
  200.  
  201. /** @}
  202.  */
  203.