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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 eth
  30.  *  @{
  31.  */
  32.  
  33. /** @file
  34.  *  Ethernet module implementation.
  35.  *  @see eth.h
  36.  */
  37.  
  38. #include <async.h>
  39. #include <malloc.h>
  40. #include <stdio.h>
  41. #include <string.h>
  42.  
  43. #include <ipc/ipc.h>
  44. #include <ipc/services.h>
  45.  
  46. #include "../../err.h"
  47. #include "../../messages.h"
  48. #include "../../modules.h"
  49.  
  50. #include "../../include/byteorder.h"
  51. #include "../../include/crc.h"
  52. #include "../../include/ethernet_lsap.h"
  53. #include "../../include/ethernet_protocols.h"
  54. #include "../../include/protocol_map.h"
  55. #include "../../netif/device.h"
  56.  
  57. #include "../../structures/measured_strings.h"
  58. #include "../../structures/packet/packet.h"
  59. #include "../../structures/packet/packet_client.h"
  60.  
  61. #include "eth.h"
  62. #include "eth_header.h"
  63. //#include "eth_messages.h"
  64. #include "eth_module.h"
  65.  
  66. #define ETH_PREFIX      ( sizeof( eth_header_t ) + sizeof( eth_header_lsap_t ) + sizeof( eth_header_snap_t ))
  67. #define ETH_SUFFIX      sizeof( eth_fcs_t )
  68. #define ETH_MAX_CONTENT 1500
  69. #define ETH_MIN_CONTENT 46
  70.  
  71. /** Returns the device identifier message parameter.
  72.  */
  73. #define IPC_GET_DEVICE( call )      ( device_id_t ) IPC_GET_ARG1( * call )
  74.  
  75. /** Returns the packet identifier message parameter.
  76.  */
  77. #define IPC_GET_PACKET( call )      ( packet_id_t ) IPC_GET_ARG2( * call )
  78.  
  79. /** Returns the protocol service message parameter.
  80.  */
  81. #define IPC_GET_PROTO( call )       ( services_t ) IPC_GET_ARG1( * call )
  82.  
  83. /** Returns the device driver service message parameter.
  84.  */
  85. #define IPC_GET_SERVICE( call )     ( services_t ) IPC_GET_ARG2( * call )
  86.  
  87. #define IPC_GET_MTU( call )         ( size_t ) IPC_GET_ARG3( * call )
  88.  
  89. #define IPC_GET_PHONE( call )       ( int ) IPC_GET_ARG5( * call )
  90.  
  91. #define IPC_SET_ADDR( answer )      (( size_t * ) & IPC_GET_ARG1( * answer ))
  92. #define IPC_SET_PREFIX( answer )    (( size_t * ) & IPC_GET_ARG2( * answer ))
  93. #define IPC_SET_CONTENT( answer )   (( size_t * ) & IPC_GET_ARG3( * answer ))
  94. #define IPC_SET_SUFFIX( answer )    (( size_t * ) & IPC_GET_ARG4( * answer ))
  95.  
  96. typedef enum eth_addr_type  eth_addr_type_t;
  97. typedef eth_addr_type_t *   eth_addr_type_ref;
  98.  
  99. enum eth_addr_type{
  100.     ETH_LOCAL_ADDR,
  101.     ETH_BROADCAST_ADDR
  102. };
  103.  
  104. /** Ethernet global data.
  105.  */
  106. eth_globals_t   eth_globals;
  107.  
  108. /** Processes IPC messages from the registered device driver modules in an infinite loop.
  109.  *  @param iid The message identifier. Input parameter.
  110.  *  @param icall The message parameters. Input/output parameter.
  111.  */
  112. void    eth_receiver( ipc_callid_t iid, ipc_call_t * icall );
  113.  
  114. DEVICE_MAP_IMPLEMENT( eth_devices, eth_device_t )
  115.  
  116. INT_MAP_IMPLEMENT( eth_protos, eth_proto_t )
  117.  
  118. int eth_device_message( device_id_t device_id, services_t service, size_t mtu );
  119. int eth_receive_message( device_id_t device_id, packet_t packet );
  120. int eth_packet_space_message( device_id_t device_id, size_t * addr_len, size_t * prefix, size_t * content, size_t * suffix );
  121. int eth_addr_message( device_id_t device_id, eth_addr_type_t type, measured_string_ref * address );
  122. int eth_register_message( services_t service, int phone );
  123. int eth_send_message( device_id_t device_id, packet_t packet, services_t sender );
  124. int eth_message( ipc_callid_t callid, ipc_call_t * call, ipc_call_t * answer, int * answer_count );
  125. void    eth_receiver( ipc_callid_t iid, ipc_call_t * icall );
  126. eth_proto_ref   eth_proccess_packet( int dummy, packet_t packet );
  127. int eth_prepare_packet( int dummy, packet_t packet, uint8_t * src_addr, int ethertype );
  128.  
  129. int eth_initialize( void ){
  130.     ERROR_DECLARE;
  131.  
  132.     rwlock_initialize( & eth_globals.devices_lock );
  133.     rwlock_initialize( & eth_globals.protos_lock );
  134.     rwlock_write_lock( & eth_globals.devices_lock );
  135.     rwlock_write_lock( & eth_globals.protos_lock );
  136.     eth_globals.broadcast_addr = measured_string_create_bulk( "\xFF\xFF\xFF\xFF\xFF\xFF", CONVERT_SIZE( uint8_t, char, ETH_ADDR ));
  137.     if( ! eth_globals.broadcast_addr ) return ENOMEM;
  138.     ERROR_PROPAGATE( eth_devices_initialize( & eth_globals.devices ));
  139.     if( ERROR_OCCURRED( eth_protos_initialize( & eth_globals.protos ))){
  140.         eth_devices_destroy( & eth_globals.devices );
  141.         return ERROR_CODE;
  142.     }
  143.     rwlock_write_unlock( & eth_globals.protos_lock );
  144.     rwlock_write_unlock( & eth_globals.devices_lock );
  145.     return EOK;
  146. }
  147.  
  148. int eth_device_message( device_id_t device_id, services_t service, size_t mtu ){
  149.     ERROR_DECLARE;
  150.  
  151.     aid_t           message;
  152.     ipc_call_t      answer;
  153.     eth_device_ref  device;
  154.     int             result;
  155.  
  156.     rwlock_write_lock( & eth_globals.devices_lock );
  157.     // an existing device?
  158.     device = eth_devices_find( & eth_globals.devices, device_id );
  159.     if( device ){
  160.         if( device->service == service ){
  161.             // update mtu
  162.             device->mtu = mtu;
  163.             rwlock_write_unlock( & eth_globals.devices_lock );
  164.             return EOK;
  165.         }else{
  166.             rwlock_write_unlock( & eth_globals.devices_lock );
  167.             return EEXIST;
  168.         }
  169.     }else{
  170.         // create a new device
  171.         device = ( eth_device_ref ) malloc( sizeof( eth_device_t ));
  172.         if( ! device ) return ENOMEM;
  173.         device->device_id = device_id;
  174.         device->service = service;
  175.         device->mtu = mtu;
  176.         // TODO get dummy setting
  177.         device->dummy = 0;
  178.         // bind the device driver
  179.         device->phone = bind_service( device->service, device->device_id, SERVICE_ETHERNET, 0, eth_receiver );
  180.         // get hardware address
  181.         message = async_send_1( device->phone, NET_NETIF_GET_ADDR, device->device_id, & answer );
  182.         if( ERROR_OCCURRED( measured_strings_return( device->phone, & device->addr, & device->addr_data, 1 ))){
  183.             rwlock_write_unlock( & eth_globals.devices_lock );
  184.             free( device );
  185.             async_wait_for( message, NULL );
  186.             return ERROR_CODE;
  187.         }
  188.         async_wait_for( message, ( ipcarg_t * ) & result );
  189.         if( ERROR_OCCURRED( result )){
  190.             rwlock_write_unlock( & eth_globals.devices_lock );
  191.             free( device->addr );
  192.             free( device->addr_data );
  193.             free( device );
  194.             return ERROR_CODE;
  195.         }
  196.         // add to the cache
  197.         if( ERROR_OCCURRED( eth_devices_add( & eth_globals.devices, device->device_id, device ))){
  198.             rwlock_write_unlock( & eth_globals.devices_lock );
  199.             free( device->addr );
  200.             free( device->addr_data );
  201.             free( device );
  202.             return ERROR_CODE;
  203.         }
  204.     }
  205.     rwlock_write_unlock( & eth_globals.devices_lock );
  206.     return EOK;
  207. }
  208.  
  209. eth_proto_ref eth_proccess_packet( int dummy, packet_t packet ){
  210.     ERROR_DECLARE;
  211.  
  212.     eth_header_ex_ref   header;
  213.     size_t              length;
  214.     int                 type;
  215.     size_t              prefix;
  216.     size_t              suffix;
  217.     eth_fcs_ref         fcs;
  218.  
  219.     length = packet_get_data_length( packet );
  220.     if( dummy ){
  221.         packet_trim( packet, sizeof( eth_preamble_t ), 0 );
  222.     }
  223.     if( length <= sizeof( eth_header_t ) + ETH_MIN_CONTENT + ETH_SUFFIX ) return NULL;
  224.     header = ( eth_header_ex_ref ) packet_get_data( packet );
  225.     type = ntohs( header->header.ethertype );
  226.     if( type >= ETH_MIN_PROTO ){
  227.         // DIX Ethernet
  228.         prefix = sizeof( eth_header_t );
  229.         suffix = sizeof( eth_fcs_t );
  230.         fcs = (( void * ) header ) + length - suffix;
  231.     }else if( type <= ETH_MAX_CONTENT ){
  232.         // translate "LSAP" values
  233.         if(( header->lsap.dsap == ETH_LSAP_GLSAP ) && ( header->lsap.ssap == ETH_LSAP_GLSAP )){
  234.             // raw packet
  235.             // discard
  236.             return NULL;
  237.         }else if(( header->lsap.dsap == ETH_LSAP_SNAP ) && ( header->lsap.ssap == ETH_LSAP_SNAP )){
  238.             // IEEE 802.3 + 802.2 + LSAP + SNAP
  239.             // organization code not supported
  240.             type = ntohs( header->snap.ethertype );
  241.             prefix = sizeof( eth_header_t ) + sizeof( eth_header_lsap_t) + sizeof( eth_header_snap_t);
  242.         }else{
  243.             // IEEE 802.3 + 802.2 LSAP
  244.             type = lsap_map( header->lsap.dsap );
  245.             prefix = sizeof( eth_header_t ) + sizeof( eth_header_lsap_t);
  246.         }
  247.         suffix = ( type < ETH_MIN_CONTENT ) ? ETH_MIN_CONTENT - type : 0;
  248.         fcs = (( void * ) header ) + prefix + type + suffix;
  249.         suffix += length - prefix - type;
  250.     }else{
  251.         // invalid length/type, should not occurr
  252.         return NULL;
  253.     }
  254.     if( dummy ){
  255.         if(( ~ compute_crc32( ~ 0, & header->header.dest, ((( void * ) fcs ) - (( void * ) & header->header.dest )) * 8 )) != ntohl( * fcs )){
  256.             return NULL;
  257.         }
  258.     }
  259.     if( ERROR_OCCURRED( packet_set_addr( packet, header->header.src, header->header.dest, ETH_ADDR ))
  260.     || ERROR_OCCURRED( packet_trim( packet, prefix, suffix ))){
  261.         return NULL;
  262.     }
  263.     return eth_protos_find( & eth_globals.protos, type );
  264. }
  265.  
  266. int eth_receive_message( device_id_t device_id, packet_t packet ){
  267.     eth_proto_ref   proto;
  268.     packet_t        next;
  269.     eth_device_ref  device;
  270.     int             dummy;
  271.  
  272.     rwlock_read_lock( & eth_globals.devices_lock );
  273.     device = eth_devices_find( & eth_globals.devices, device_id );
  274.     if( ! device ){
  275.         rwlock_read_unlock( & eth_globals.devices_lock );
  276.         return ENOENT;
  277.     }
  278.     dummy = device->dummy;
  279.     rwlock_read_unlock( & eth_globals.devices_lock );
  280.     rwlock_read_lock( & eth_globals.protos_lock );
  281.     do{
  282.         next = pq_detach( packet );
  283.         proto = eth_proccess_packet( dummy, packet );
  284.         if( proto ){
  285.             async_msg_2( proto->phone, NET_IL_RECEIVED, device_id, packet_get_id( packet ));
  286.         }else{
  287.             // drop invalid/unknown
  288.             packet_release( eth_globals.networking_phone, packet_get_id( packet ));
  289.         }
  290.         packet = next;
  291.     }while( packet );
  292.     rwlock_read_unlock( & eth_globals.protos_lock );
  293.     return EOK;
  294. }
  295.  
  296. int eth_packet_space_message( device_id_t device_id, size_t * addr_len, size_t * prefix, size_t * content, size_t * suffix ){
  297.     eth_device_ref  device;
  298.  
  299.     if( !( addr_len && prefix && content && suffix )) return EINVAL;
  300.     rwlock_write_lock( & eth_globals.devices_lock );
  301.     device = eth_devices_find( & eth_globals.devices, device_id );
  302.     if( ! device ){
  303.         rwlock_write_unlock( & eth_globals.devices_lock );
  304.         return ENOENT;
  305.     }
  306.     * content = (  ETH_MAX_CONTENT > device->mtu ) ? device->mtu : ETH_MAX_CONTENT;
  307.     rwlock_write_unlock( & eth_globals.devices_lock );
  308.     * addr_len = ETH_ADDR;
  309.     * prefix = ETH_PREFIX;
  310.     * suffix = ETH_MIN_CONTENT + ETH_SUFFIX;
  311.     return EOK;
  312. }
  313.  
  314. int eth_addr_message( device_id_t device_id, eth_addr_type_t type, measured_string_ref * address ){
  315.     eth_device_ref  device;
  316.  
  317.     if( ! address ) return EINVAL;
  318.     if( type == ETH_BROADCAST_ADDR ){
  319.         * address = eth_globals.broadcast_addr;
  320.     }else{
  321.         rwlock_write_lock( & eth_globals.devices_lock );
  322.         device = eth_devices_find( & eth_globals.devices, device_id );
  323.         if( ! device ){
  324.             rwlock_write_unlock( & eth_globals.devices_lock );
  325.             return ENOENT;
  326.         }
  327.         * address = device->addr;
  328.         rwlock_write_unlock( & eth_globals.devices_lock );
  329.     }
  330.     return ( * address ) ? EOK : ENOENT;
  331. }
  332.  
  333. int eth_register_message( services_t service, int phone ){
  334.     ERROR_DECLARE;
  335.  
  336.     eth_proto_ref   proto;
  337.     int             protocol;
  338.  
  339.     protocol = protocol_map( SERVICE_ETHERNET, service );
  340.     if( ! protocol ) return ENOENT;
  341.     rwlock_write_lock( & eth_globals.protos_lock );
  342.     proto = eth_protos_find( & eth_globals.protos, protocol );
  343.     if( proto ){
  344.         proto->phone = phone;
  345.         rwlock_write_unlock( & eth_globals.protos_lock );
  346.         return EOK;
  347.     }else{
  348.         proto = ( eth_proto_ref ) malloc( sizeof( eth_proto_t ));
  349.         if( ! proto ){
  350.             rwlock_write_unlock( & eth_globals.protos_lock );
  351.             return ENOMEM;
  352.         }
  353.         proto->service = service;
  354.         proto->protocol = protocol;
  355.         proto->phone = phone;
  356.         if( ERROR_OCCURRED( eth_protos_add( & eth_globals.protos, protocol, proto ))){
  357.             rwlock_write_unlock( & eth_globals.protos_lock );
  358.             free( proto );
  359.             return ERROR_CODE;
  360.         }
  361.     }
  362.     rwlock_write_unlock( & eth_globals.protos_lock );
  363.     return EOK;
  364. }
  365.  
  366. int eth_prepare_packet( int dummy, packet_t packet, uint8_t * src_addr, int ethertype ){
  367.     eth_header_ex_ref   header;
  368.     eth_fcs_ref         fcs;
  369.     uint8_t *           src;
  370.     uint8_t *           dest;
  371.     int                 length;
  372.     int                 i;
  373.     void *              padding;
  374.     eth_preamble_ref    preamble;
  375.  
  376.     if( dummy ){
  377.         preamble = PACKET_PREFIX( packet, eth_preamble_t );
  378.         if( ! preamble ) return ENOMEM;
  379.         for( i = 0; i < 7; ++ i ) preamble->preamble[ i ] = ETH_PREAMBLE;
  380.         preamble->sfd = ETH_SFD;
  381.     }
  382.     header = PACKET_PREFIX( packet, eth_header_ex_t );
  383.     if( ! header ) return ENOMEM;
  384.     length = packet_get_addr( packet, & src, & dest );
  385.     if( length < 0 ) return length;
  386.     if( length < ETH_ADDR ) return EINVAL;
  387.     memcpy( header->header.src, src_addr, ETH_ADDR );
  388.     memcpy( & header->header.dest, dest, ETH_ADDR );
  389.     length = packet_get_data_length( packet );
  390.     if( length > ETH_MAX_CONTENT ) return EINVAL;
  391.     if( length < ETH_MIN_CONTENT ){
  392.         padding = packet_suffix( packet, ETH_MIN_CONTENT - length );
  393.         if( ! padding ) return ENOMEM;
  394.         memset( padding, 0, ETH_MIN_CONTENT - length );
  395.     }
  396.     header->header.ethertype = htons( length );
  397.     header->lsap.dsap = 0xAA;
  398.     header->lsap.ssap = header->lsap.dsap;
  399.     header->lsap.ctrl = 0;
  400.     for( i = 0; i < 3; ++ i ) header->snap.proto[ i ] = 0;
  401.     header->snap.ethertype = ethertype;
  402.     if( dummy ){
  403.         fcs = PACKET_SUFFIX( packet, eth_fcs_t );
  404.         if( ! fcs ) return ENOMEM;
  405.         * fcs = htonl( ~ compute_crc32( ~ 0, & header->header.dest, ((( void * ) fcs ) - (( void * ) & header->header.dest )) * 8 ));
  406.     }
  407.     return EOK;
  408. }
  409.  
  410. int eth_send_message( device_id_t device_id, packet_t packet, services_t sender ){
  411.     ERROR_DECLARE;
  412.  
  413.     eth_device_ref      device;
  414.     packet_t            next;
  415.     packet_t            tmp;
  416.     int                 ethertype;
  417.  
  418.     ethertype = htons( protocol_map( SERVICE_ETHERNET, sender ));
  419.     if( ! ethertype ){
  420.         packet_release( eth_globals.networking_phone, packet_get_id( packet ));
  421.         return EINVAL;
  422.     }
  423.     rwlock_read_lock( & eth_globals.devices_lock );
  424.     device = eth_devices_find( & eth_globals.devices, device_id );
  425.     if( ! device ){
  426.         rwlock_read_unlock( & eth_globals.devices_lock );
  427.         return ENOENT;
  428.     }
  429.     // proccess packet queue
  430.     next = packet;
  431.     do{
  432.         if( ERROR_OCCURRED( eth_prepare_packet( device->dummy, next, ( uint8_t * ) device->addr->value, ethertype ))){
  433.             // release invalid packet
  434.             tmp = pq_detach( next );
  435.             packet_release( eth_globals.networking_phone, packet_get_id( next ));
  436.             next = tmp;
  437.         }else{
  438.             next = pq_next( next );
  439.         }
  440.     }while( next );
  441.     // send packet queue
  442.     async_msg_2( device->phone, NET_NETIF_SEND, device_id, packet_get_id( packet ));
  443.     rwlock_read_unlock( & eth_globals.devices_lock );
  444.     return EOK;
  445. }
  446.  
  447. int eth_message( ipc_callid_t callid, ipc_call_t * call, ipc_call_t * answer, int * answer_count ){
  448.     ERROR_DECLARE;
  449.  
  450.     measured_string_ref address;
  451.     packet_t            packet;
  452.  
  453.     * answer_count = 0;
  454.     switch( IPC_GET_METHOD( * call )){
  455.         case IPC_M_PHONE_HUNGUP:
  456.             return EOK;
  457.         case NET_NIL_DEVICE:
  458.             return eth_device_message( IPC_GET_DEVICE( call ), IPC_GET_SERVICE( call ), IPC_GET_MTU( call ));
  459.         case NET_NIL_SEND:
  460.             ERROR_PROPAGATE( packet_translate( eth_globals.networking_phone, & packet, IPC_GET_PACKET( call )));
  461.             return eth_send_message( IPC_GET_DEVICE( call ), packet, IPC_GET_SERVICE( call ));
  462.         case NET_NIL_PACKET_SPACE:
  463.             ERROR_PROPAGATE( eth_packet_space_message( IPC_GET_DEVICE( call ), IPC_SET_ADDR( answer ), IPC_SET_PREFIX( answer ), IPC_SET_CONTENT( answer ), IPC_SET_SUFFIX( answer )));
  464.             * answer_count = 3;
  465.             return EOK;
  466.         case NET_NIL_ADDR:
  467.             rwlock_read_lock( & eth_globals.devices_lock );
  468.             if( ! ERROR_OCCURRED( eth_addr_message( IPC_GET_DEVICE( call ), ETH_LOCAL_ADDR, & address ))){
  469.                  ERROR_CODE = measured_strings_reply( address, 1 );
  470.             }
  471.             rwlock_read_unlock( & eth_globals.devices_lock );
  472.             return ERROR_CODE;
  473.         case NET_NIL_BROADCAST_ADDR:
  474.             rwlock_read_lock( & eth_globals.devices_lock );
  475.             if( ! ERROR_OCCURRED( eth_addr_message( IPC_GET_DEVICE( call ), ETH_BROADCAST_ADDR, & address ))){
  476.                  ERROR_CODE = measured_strings_reply( address, 1 );
  477.             }
  478.             rwlock_read_unlock( & eth_globals.devices_lock );
  479.             return ERROR_CODE;
  480.         case IPC_M_CONNECT_TO_ME:
  481.             return eth_register_message( IPC_GET_PROTO( call ), IPC_GET_PHONE( call ));
  482.     }
  483.     return ENOTSUP;
  484. }
  485.  
  486. void eth_receiver( ipc_callid_t iid, ipc_call_t * icall ){
  487.     ERROR_DECLARE;
  488.  
  489.     packet_t        packet;
  490.  
  491.     while( true ){
  492.         switch( IPC_GET_METHOD( * icall )){
  493.             case NET_NIL_DEVICE_STATE:
  494.                 //TODO clear device if off?
  495.                 break;
  496.             case NET_NIL_RECEIVED:
  497.                 if( ! ERROR_OCCURRED( packet_translate( eth_globals.networking_phone, & packet, IPC_GET_PACKET( icall )))){
  498.                     ERROR_CODE = eth_receive_message( IPC_GET_DEVICE( icall ), packet );
  499.                 }
  500.                 ipc_answer_0( iid, ERROR_CODE );
  501.                 break;
  502.             default:
  503.                 ipc_answer_0( iid, ENOTSUP );
  504.         }
  505.         iid = async_get_call( icall );
  506.     }
  507. }
  508.  
  509. /** @}
  510.  */
  511.