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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 arp
  30.  *  @{
  31.  */
  32.  
  33. /** @file
  34.  *  ARP module implementation.
  35.  *  @see arp.h
  36.  */
  37.  
  38. #include <async.h>
  39. #include <malloc.h>
  40. #include <rwlock.h>
  41. #include <stdio.h>
  42. #include <string.h>
  43.  
  44. #include <ipc/ipc.h>
  45. #include <ipc/services.h>
  46.  
  47. #include "../../err.h"
  48. #include "../../messages.h"
  49. #include "../../modules.h"
  50.  
  51. #include "../../include/protocol_map.h"
  52. #include "../../netif/device.h"
  53.  
  54. #include "../../structures/measured_strings.h"
  55. #include "../../structures/packet/packet.h"
  56. #include "../../structures/packet/packet_client.h"
  57.  
  58. #include "arp.h"
  59. #include "arp_header.h"
  60. #include "arp_oc.h"
  61. //#include "arp_messages.h"
  62. #include "arp_module.h"
  63.  
  64. /** Returns the device identifier message parameter.
  65.  */
  66. #define IPC_GET_DEVICE( call )      ( device_id_t ) IPC_GET_ARG1( * call )
  67.  
  68. /** Returns the packet identifier message parameter.
  69.  */
  70. #define IPC_GET_PACKET( call )      ( packet_id_t ) IPC_GET_ARG2( * call )
  71.  
  72. /** Returns the protocol service message parameter.
  73.  */
  74. #define IPC_GET_PROTO( call )       ( services_t ) IPC_GET_ARG2( * call )
  75.  
  76. /** Returns the device driver service message parameter.
  77.  */
  78. #define IPC_GET_SERVICE( call )     ( services_t ) IPC_GET_ARG3( * call )
  79.  
  80. /** ARP global data.
  81.  */
  82. arp_globals_t   arp_globals;
  83.  
  84. /** Creates new protocol specific data.
  85.  *  @param proto Protocol specific data. Output parameter.
  86.  *  @param service Protocol module service. Input parameter.
  87.  *  @param address Actual protocol device address. Input parameter.
  88.  *  @returns EOK on success.
  89.  *  @returns ENOMEM if there is not enough memory left.
  90.  */
  91. int arp_proto_create( arp_proto_ref * proto, services_t service, measured_string_ref address );
  92.  
  93. /** Registers the device.
  94.  *  Creates new device entry in the cache or updates the protocol address if the device with the device identifier and the driver service exists.
  95.  *  @param device_id The device identifier. Input parameter.
  96.  *  @param service The device driver service. Input parameter.
  97.  *  @param protocol The protocol service. Input parameter.
  98.  *  @param address The actual device protocol address.
  99.  *  @returns EOK on success.
  100.  *  @returns EEXIST if another device with the same device identifier and different driver service exists.
  101.  *  @returns ENOMEM if there is not enough memory left.
  102.  *  @returns Other error codes as defined for the measured_strings_return() function.
  103.  */
  104. int arp_device_message( device_id_t device_id, services_t service, services_t protocol, measured_string_ref address );
  105.  
  106. /** Returns the hardware address for the given protocol address.
  107.  *  Sends the ARP request packet if the hardware address is not found in the cache.
  108.  *  @param device_id The device identifier. Input parameter.
  109.  *  @param protocol The protocol service. Input parameter.
  110.  *  @param target The target protocol address. Input parameter.
  111.  *  @returns The hardware address of the target.
  112.  *  @returns NULL if the target parameter is NULL.
  113.  *  @returns NULL if the device is not found.
  114.  *  @returns NULL if the device packet is too small to send a&nbsp;request.
  115.  *  @returns NULL if the hardware address is not found in the cache.
  116.  */
  117. measured_string_ref arp_translate_message( device_id_t device_id, services_t protocol, measured_string_ref target );
  118.  
  119. /** Processes the received ARP packet.
  120.  *  Updates the source hardware address if the source entry exists or the packet is targeted to my protocol address.
  121.  *  Responses to the ARP request if the packet is the ARP request and is targeted to my address.
  122.  *  @param device_id The source device identifier. Input parameter.
  123.  *  @param packet The received packet. Input/output parameter.
  124.  *  @returns EOK on success.
  125.  *  @returns EINVAL if the packet is too small to carry the ARP packet.
  126.  *  @returns EINVAL if the received address lengths differs from the registered values.
  127.  *  @returns ENOENT if the device is not found in the cache.
  128.  *  @returns ENOENT if the protocol for the device is not found in the cache.
  129.  *  @returns ENOMEM if there is not enough memory left.
  130.  */
  131. int arp_receive_message( device_id_t device_id, packet_t packet );
  132.  
  133. /** Clears the device specific data from the cache.
  134.  *  @param device_id The device identifier. Input parameter.
  135.  *  @returns EOK on success.
  136.  *  @returns ENOENT  if the device is not found in the cache.
  137.  */
  138. int arp_clear_device_message( device_id_t device_id );
  139.  
  140. /** Clears the device specific data.
  141.  *  @param device The device specific data.
  142.  */
  143. void    clear_device( arp_device_ref device );
  144.  
  145. /** Clears the whole cache.
  146.  *  @returns EOK on success.
  147.  */
  148. int arp_clean_cache_message( void );
  149.  
  150. /** Processes IPC messages from the registered device driver modules in an infinite loop.
  151.  *  @param iid The message identifier. Input parameter.
  152.  *  @param icall The message parameters. Input/output parameter.
  153.  */
  154. void    arp_receiver( ipc_callid_t iid, ipc_call_t * icall );
  155.  
  156. DEVICE_MAP_IMPLEMENT( arp_cache, arp_device_t )
  157.  
  158. INT_MAP_IMPLEMENT( arp_protos, arp_proto_t )
  159.  
  160. GENERIC_CHAR_MAP_IMPLEMENT( arp_addr, measured_string_t )
  161.  
  162. int arp_initialize( void ){
  163.     ERROR_DECLARE;
  164.  
  165.     rwlock_initialize( & arp_globals.lock );
  166.     rwlock_write_lock( & arp_globals.lock );
  167.     ERROR_PROPAGATE( arp_cache_initialize( & arp_globals.cache ));
  168.     rwlock_write_unlock( & arp_globals.lock );
  169.     return EOK;
  170. }
  171.  
  172. int arp_proto_create( arp_proto_ref * proto, services_t service, measured_string_ref address ){
  173.     ERROR_DECLARE;
  174.  
  175.     * proto = ( arp_proto_ref ) malloc( sizeof( arp_proto_t ));
  176.     if( !( * proto )) return ENOMEM;
  177.     ( ** proto ).service = service;
  178.     ( ** proto ).addr = address;
  179.     ( ** proto ).addr_data = address->value;
  180.     if( ERROR_OCCURRED( arp_addr_initialize( &( ** proto).addresses ))){
  181.         free( * proto );
  182.         return ERROR_CODE;
  183.     }
  184.     return EOK;
  185. }
  186.  
  187. int arp_device_message( device_id_t device_id, services_t service, services_t protocol, measured_string_ref address ){
  188.     ERROR_DECLARE;
  189.  
  190.     arp_device_ref  device;
  191.     aid_t           message;
  192.     ipc_call_t      answer;
  193.     ipcarg_t        result;
  194.     arp_proto_ref   proto;
  195.  
  196.     rwlock_write_lock( & arp_globals.lock );
  197.     // an existing device?
  198.     device = arp_cache_find( & arp_globals.cache, device_id );
  199.     if( device ){
  200.         if( device->service != service ){
  201.             rwlock_write_unlock( & arp_globals.lock );
  202.             return EEXIST;
  203.         }
  204.         proto = arp_protos_find( & device->protos, protocol );
  205.         if( proto ){
  206.             free( proto->addr );
  207.             free( proto->addr_data );
  208.             proto->addr = address;
  209.             proto->addr_data = address->value;
  210.         }else{
  211.             if( ERROR_OCCURRED( arp_proto_create( & proto, protocol, address ))){
  212.                 rwlock_write_unlock( & arp_globals.lock );
  213.                 return ERROR_CODE;
  214.             }
  215.             if( ERROR_OCCURRED( arp_protos_add( & device->protos, proto->service, proto ))){
  216.                 rwlock_write_unlock( & arp_globals.lock );
  217.                 free( proto );
  218.                 return ERROR_CODE;
  219.             }
  220.         }
  221.         return EOK;
  222.     }else{
  223.         // create a new device
  224.         device = ( arp_device_ref ) malloc( sizeof( arp_device_t ));
  225.         if( ! device ){
  226.             rwlock_write_unlock( & arp_globals.lock );
  227.             return ENOMEM;
  228.         }
  229.         device->device_id = device_id;
  230.         if( ERROR_OCCURRED( arp_protos_initialize( & device->protos ))
  231.         || ERROR_OCCURRED( arp_proto_create( & proto, protocol, address ))){
  232.             rwlock_write_unlock( & arp_globals.lock );
  233.             free( device );
  234.             return ERROR_CODE;
  235.         }
  236.         if( ERROR_OCCURRED( arp_protos_add( & device->protos, proto->service, proto ))){
  237.             rwlock_write_unlock( & arp_globals.lock );
  238.             arp_protos_destroy( & device->protos );
  239.             free( device );
  240.             return ERROR_CODE;
  241.         }
  242.         device->service = service;
  243.         // bind the new one
  244.         device->phone = bind_service( device->service, device->device_id, SERVICE_ARP, 0, arp_receiver );
  245.         // get packet dimensions
  246.         if( ERROR_OCCURRED( async_req_1_4( device->phone, NET_NIL_PACKET_SPACE, device_id, & device->addr_len, & device->prefix, & device->content, & device->suffix ))){
  247.             rwlock_write_unlock( & arp_globals.lock );
  248.             arp_protos_destroy( & device->protos );
  249.             free( device );
  250.             return ERROR_CODE;
  251.         }
  252.         // get hardware address
  253.         message = async_send_1( device->phone, NET_NIL_ADDR, device->device_id, & answer );
  254.         if( ERROR_OCCURRED( measured_strings_return( device->phone, & device->addr, & device->addr_data, 1 ))){
  255.             rwlock_write_unlock( & arp_globals.lock );
  256.             arp_protos_destroy( & device->protos );
  257.             free( device );
  258.             async_wait_for( message, NULL );
  259.             return ERROR_CODE;
  260.         }
  261.         async_wait_for( message, & result );
  262.         if( ERROR_OCCURRED( result )){
  263.             rwlock_write_unlock( & arp_globals.lock );
  264.             free( device->addr );
  265.             free( device->addr_data );
  266.             arp_protos_destroy( & device->protos );
  267.             free( device );
  268.             return ERROR_CODE;
  269.         }
  270.         // get broadcast address
  271.         message = async_send_1( device->phone, NET_NIL_BROADCAST_ADDR, device->device_id, & answer );
  272.         if( ERROR_OCCURRED( measured_strings_return( device->phone, & device->broadcast_addr, & device->broadcast_data, 1 ))){
  273.             rwlock_write_unlock( & arp_globals.lock );
  274.             free( device->addr );
  275.             free( device->addr_data );
  276.             arp_protos_destroy( & device->protos );
  277.             free( device );
  278.             async_wait_for( message, NULL );
  279.             return ERROR_CODE;
  280.         }
  281.         async_wait_for( message, & result );
  282.         // add to the cache
  283.         if( ERROR_OCCURRED( result )
  284.         || ERROR_OCCURRED( arp_cache_add( & arp_globals.cache, device->device_id, device ))){
  285.             rwlock_write_unlock( & arp_globals.lock );
  286.             free( device->addr );
  287.             free( device->addr_data );
  288.             free( device->broadcast_addr );
  289.             free( device->broadcast_data );
  290.             arp_protos_destroy( & device->protos );
  291.             free( device );
  292.             return ERROR_CODE;
  293.         }
  294.     }
  295.     rwlock_write_unlock( & arp_globals.lock );
  296.     return EOK;
  297. }
  298.  
  299. measured_string_ref arp_translate_message( device_id_t device_id, services_t protocol, measured_string_ref target ){
  300.     arp_device_ref      device;
  301.     arp_proto_ref       proto;
  302.     measured_string_ref addr;
  303.     size_t              length;
  304.     packet_t            packet;
  305.     arp_header_ref      header;
  306.  
  307.     if( ! target ) return NULL;
  308.     rwlock_read_lock( & arp_globals.lock );
  309.     device = arp_cache_find( & arp_globals.cache, device_id );
  310.     if( ! device ){
  311.         rwlock_read_unlock( & arp_globals.lock );
  312.         return NULL;
  313.     }
  314.     proto = arp_protos_find( & device->protos, protocol );
  315.     if(( ! proto ) || ( proto->addr->length != target->length )){
  316.         rwlock_read_unlock( & arp_globals.lock );
  317.         return NULL;
  318.     }
  319.     addr = arp_addr_find( & proto->addresses, target->value, target->length );
  320.     if( addr ){
  321.         rwlock_read_unlock( & arp_globals.lock );
  322.         return addr;
  323.     }
  324.     // ARP packet content size = header + ( address + translation ) * 2
  325.     length = 8 + ( CONVERT_SIZE( char, uint8_t, proto->addr->length ) + CONVERT_SIZE( char, uint8_t, device->addr->length )) * 2;
  326.     if( length > device->content ){
  327.         rwlock_read_unlock( & arp_globals.lock );
  328.         return NULL;
  329.     }
  330.     packet = packet_get_4( arp_globals.networking_phone, device->addr_len, device->prefix, length, device->suffix );
  331.     if( ! packet ){
  332.         rwlock_read_unlock( & arp_globals.lock );
  333.         return NULL;
  334.     }
  335.     header = ( arp_header_ref ) packet_suffix( packet, length );
  336.     header->hardware = device->hardware;
  337.     header->hardware_length = device->addr->length;
  338.     header->protocol = protocol_map( device->service, protocol );
  339.     header->protocol_length = proto->addr->length;
  340.     header->operation = ARPOP_REQUEST;
  341.     length = sizeof( arp_header_t );
  342.     memcpy((( uint8_t * ) header ) + length, device->addr->value, device->addr->length );
  343.     length += device->addr->length;
  344.     memcpy((( uint8_t * ) header ) + length, proto->addr->value, proto->addr->length );
  345.     length += proto->addr->length;
  346.     memset((( uint8_t * ) header ) + length, 0, device->addr->length );
  347.     length += device->addr->length;
  348.     memcpy((( uint8_t * ) header ) + length, target->value, target->length );
  349.     packet_set_addr( packet, ( uint8_t * ) device->addr->value, ( uint8_t * ) device->broadcast_addr->value, CONVERT_SIZE( char, uint8_t, device->addr->length ));
  350.     async_msg_3( device->phone, NET_NETIF_SEND, device_id, SERVICE_ARP, packet_get_id( packet ));
  351.     rwlock_read_unlock( & arp_globals.lock );
  352.     return NULL;
  353. }
  354.  
  355. int arp_receive_message( device_id_t device_id, packet_t packet ){
  356.     ERROR_DECLARE;
  357.  
  358.     size_t              length;
  359.     arp_header_ref      header;
  360.     arp_device_ref      device;
  361.     arp_proto_ref       proto;
  362.     measured_string_ref hw_source;
  363.     uint8_t *           src_hw;
  364.     uint8_t *           src_proto;
  365.     uint8_t *           des_hw;
  366.     uint8_t *           des_proto;
  367.  
  368.     length = packet_get_data_length( packet );
  369.     if( length <= sizeof( arp_header_t )) return EINVAL;
  370.     rwlock_read_lock( & arp_globals.lock );
  371.     device = arp_cache_find( & arp_globals.cache, device_id );
  372.     if( ! device ){
  373.         rwlock_read_unlock( & arp_globals.lock );
  374.         return ENOENT;
  375.     }
  376.     header = ( arp_header_ref ) packet_get_data( packet );
  377.     if(( header->hardware != device->hardware )
  378.     || ( length < sizeof( arp_header_t ) + ( header->hardware_length + header->protocol_length ) * 2 )){
  379.         rwlock_read_unlock( & arp_globals.lock );
  380.         return EINVAL;
  381.     }
  382.     proto = arp_protos_find( & device->protos, protocol_unmap( device->service, header->protocol ));
  383.     if( ! proto ){
  384.         rwlock_read_unlock( & arp_globals.lock );
  385.         return ENOENT;
  386.     }
  387.     src_hw = (( uint8_t * ) header ) + sizeof( arp_header_t );
  388.     src_proto = src_hw + header->hardware_length;
  389.     des_hw = src_proto + header->protocol_length;
  390.     des_proto = des_hw + header->hardware_length;
  391.     hw_source = arp_addr_find( & proto->addresses, ( char * ) src_proto, CONVERT_SIZE( uint8_t, char, header->protocol_length ));
  392.     // exists?
  393.     if( hw_source ){
  394.         if( hw_source->length != CONVERT_SIZE( uint8_t, char, header->hardware_length )){
  395.             rwlock_read_unlock( & arp_globals.lock );
  396.             return EINVAL;
  397.         }
  398.         memcpy( hw_source->value, src_hw, hw_source->length );
  399.     }
  400.     // is my protocol address?
  401.     if( proto->addr->length != CONVERT_SIZE( uint8_t, char, header->hardware_length )){
  402.         rwlock_read_unlock( & arp_globals.lock );
  403.         return EINVAL;
  404.     }
  405.     if( ! strncmp( proto->addr->value, ( char * ) des_proto, proto->addr->length )){
  406.         // not already upadted?
  407.         if( ! hw_source ){
  408.             hw_source = measured_string_create_bulk(( char * ) src_hw, CONVERT_SIZE( uint8_t, char, header->hardware_length ));
  409.             if( ! hw_source ){
  410.                 rwlock_read_unlock( & arp_globals.lock );
  411.                 return ENOMEM;
  412.             }
  413.             if( ERROR_OCCURRED( arp_addr_add( & proto->addresses, ( char * ) src_proto, CONVERT_SIZE( uint8_t, char, header->protocol_length ), hw_source ))){
  414.                 rwlock_read_unlock( & arp_globals.lock );
  415.                 return ERROR_CODE;
  416.             }
  417.         }
  418.         if( header->operation == ARPOP_REQUEST ){
  419.             header->operation = ARPOP_REPLY;
  420.             memcpy( des_proto, src_proto, header->protocol_length );
  421.             memcpy( src_proto, proto->addr->value, header->protocol_length );
  422.             memcpy( src_hw, des_hw, header->hardware_length );
  423.             memcpy( des_hw, hw_source->value, header->hardware_length );
  424.             packet_set_addr( packet, src_hw, des_hw, header->hardware_length );
  425.             async_msg_3( device->phone, NET_NETIF_SEND, device_id, SERVICE_ARP, packet_get_id( packet ));
  426.             rwlock_read_unlock( & arp_globals.lock );
  427.         }else{
  428.             rwlock_read_unlock( & arp_globals.lock );
  429.             packet_release( arp_globals.networking_phone, packet_get_id( packet ));
  430.         }
  431.     }
  432.     return EOK;
  433. }
  434.  
  435. int arp_clear_device_message( device_id_t device_id ){
  436.     arp_device_ref  device;
  437.  
  438.     rwlock_write_lock( & arp_globals.lock );
  439.     device = arp_cache_find( & arp_globals.cache, device_id );
  440.     if( ! device ){
  441.         rwlock_write_unlock( & arp_globals.lock );
  442.         return ENOENT;
  443.     }
  444.     clear_device( device );
  445.     rwlock_write_unlock( & arp_globals.lock );
  446.     return EOK;
  447. }
  448.  
  449. void clear_device( arp_device_ref device ){
  450.     int             count;
  451.     arp_proto_ref   proto;
  452.  
  453.     count = arp_protos_count( & device->protos );
  454.     while( count > 0 ){
  455.         proto = arp_protos_get_index( & device->protos, count );
  456.         if( proto->addr ) free( proto->addr );
  457.         if( proto->addr_data ) free( proto->addr_data );
  458.         arp_addr_destroy( & proto->addresses );
  459.         -- count;
  460.     }
  461.     arp_protos_clear( & device->protos );
  462. }
  463.  
  464. int arp_clean_cache_message( void ){
  465.     int             count;
  466.     arp_device_ref  device;
  467.  
  468.     rwlock_write_lock( & arp_globals.lock );
  469.     count = arp_cache_count( & arp_globals.cache );
  470.     while( count > 0 ){
  471.         device = arp_cache_get_index( & arp_globals.cache, count );
  472.         if( device ){
  473.             clear_device( device );
  474.             if( device->addr_data ) free( device->addr_data );
  475.             if( device->broadcast_data ) free( device->broadcast_data );
  476.         }
  477.     }
  478.     arp_cache_clear( & arp_globals.cache );
  479.     rwlock_write_lock( & arp_globals.lock );
  480.     return EOK;
  481. }
  482.  
  483. int arp_message( ipc_callid_t callid, ipc_call_t * call, ipc_call_t * answer, int * answer_count ){
  484.     ERROR_DECLARE;
  485.  
  486.     measured_string_ref address;
  487.     measured_string_ref translation;
  488.     char *              data;
  489.  
  490.     * answer_count = 0;
  491.     switch( IPC_GET_METHOD( * call )){
  492.         case IPC_M_PHONE_HUNGUP:
  493.             return EOK;
  494.         case NET_ARP_DEVICE:
  495.             ERROR_PROPAGATE( measured_strings_receive( & address, & data, 1 ));
  496.             if( ERROR_OCCURRED( arp_device_message( IPC_GET_DEVICE( call ), IPC_GET_SERVICE( call ), IPC_GET_PROTO( call ), address ))){
  497.                 free( address );
  498.                 free( data );
  499.             }
  500.             return ERROR_CODE;
  501.         case NET_ARP_TRANSLATE:
  502.             ERROR_PROPAGATE( measured_strings_receive( & address, & data, 1 ));
  503.             translation = arp_translate_message( IPC_GET_DEVICE( call ), IPC_GET_PROTO( call ), address );
  504.             free( address );
  505.             free( data );
  506.             if( ! translation ) return ENOENT;
  507.             return measured_strings_reply( translation, 1 );
  508.         case NET_ARP_CLEAR_DEVICE:
  509.             return arp_clear_device_message( IPC_GET_DEVICE( call ));
  510.         case NET_ARP_CLEAN_CACHE:
  511.             return arp_clean_cache_message();
  512.     }
  513.     return ENOTSUP;
  514. }
  515.  
  516. void arp_receiver( ipc_callid_t iid, ipc_call_t * icall ){
  517.     ERROR_DECLARE;
  518.  
  519.     packet_t        packet;
  520.  
  521.     while( true ){
  522.         switch( IPC_GET_METHOD( * icall )){
  523.             case NET_IL_DEVICE_STATE:
  524.                 // do nothing - keep the cache
  525.                 ipc_answer_0( iid, EOK );
  526.                 break;
  527.             case NET_IL_RECEIVED:
  528.                 if( ! ERROR_OCCURRED( packet_translate( arp_globals.networking_phone, & packet, IPC_GET_PACKET( icall )))){
  529.                     ERROR_CODE = arp_receive_message( IPC_GET_DEVICE( icall ), packet );
  530.                 }
  531.                 ipc_answer_0( iid, ERROR_CODE );
  532.                 break;
  533.             default:
  534.                 ipc_answer_0( iid, ENOTSUP );
  535.         }
  536.         iid = async_get_call( icall );
  537.     }
  538. }
  539.  
  540. /** @}
  541.  */
  542.