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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.             printf( "\nDevice %d already exists", device->device_id );
  162.             rwlock_write_unlock( & eth_globals.devices_lock );
  163.             return EEXIST;
  164.         }else{
  165.             // update mtu
  166.             device->mtu = mtu;
  167.             printf( "\nDevice %d already exists:\tMTU\t= %d", device->device_id, device->mtu );
  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 > 0 ) ? mtu : ETH_MAX_CONTENT;
  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.         if( device->phone < 0 ){
  181.             rwlock_write_unlock( & eth_globals.devices_lock );
  182.             free( device );
  183.             return device->phone;
  184.         }
  185.         // get hardware address
  186.         message = async_send_1( device->phone, NET_NETIF_GET_ADDR, device->device_id, & answer );
  187.         if( ERROR_OCCURRED( measured_strings_return( device->phone, & device->addr, & device->addr_data, 1 ))){
  188.             rwlock_write_unlock( & eth_globals.devices_lock );
  189.             free( device );
  190.             async_wait_for( message, NULL );
  191.             return ERROR_CODE;
  192.         }
  193.         async_wait_for( message, ( ipcarg_t * ) & result );
  194.         if( ERROR_OCCURRED( result )){
  195.             rwlock_write_unlock( & eth_globals.devices_lock );
  196.             free( device->addr );
  197.             free( device->addr_data );
  198.             free( device );
  199.             return ERROR_CODE;
  200.         }
  201.         // add to the cache
  202.         if( ERROR_OCCURRED( eth_devices_add( & eth_globals.devices, device->device_id, device ))){
  203.             rwlock_write_unlock( & eth_globals.devices_lock );
  204.             free( device->addr );
  205.             free( device->addr_data );
  206.             free( device );
  207.             return ERROR_CODE;
  208.         }
  209.         printf( "\nNew device registered:\n\tid\t= %d\n\tservice\t= %d\n\tMTU\t= %d\n\taddress\t= %X:%X:%X:%X:%X:%X", device->device_id, device->service, device->mtu, device->addr_data[ 0 ], device->addr_data[ 1 ], device->addr_data[ 2 ], device->addr_data[ 3 ], device->addr_data[ 4 ], device->addr_data[ 5 ] );
  210.     }
  211.     rwlock_write_unlock( & eth_globals.devices_lock );
  212.     return EOK;
  213. }
  214.  
  215. eth_proto_ref eth_proccess_packet( int dummy, packet_t packet ){
  216.     ERROR_DECLARE;
  217.  
  218.     eth_header_ex_ref   header;
  219.     size_t              length;
  220.     int                 type;
  221.     size_t              prefix;
  222.     size_t              suffix;
  223.     eth_fcs_ref         fcs;
  224.  
  225.     length = packet_get_data_length( packet );
  226.     if( dummy ){
  227.         packet_trim( packet, sizeof( eth_preamble_t ), 0 );
  228.     }
  229.     if( length <= sizeof( eth_header_t ) + ETH_MIN_CONTENT + ETH_SUFFIX ) return NULL;
  230.     header = ( eth_header_ex_ref ) packet_get_data( packet );
  231.     type = ntohs( header->header.ethertype );
  232.     if( type >= ETH_MIN_PROTO ){
  233.         // DIX Ethernet
  234.         prefix = sizeof( eth_header_t );
  235.         suffix = sizeof( eth_fcs_t );
  236.         fcs = (( void * ) header ) + length - suffix;
  237.     }else if( type <= ETH_MAX_CONTENT ){
  238.         // translate "LSAP" values
  239.         if(( header->lsap.dsap == ETH_LSAP_GLSAP ) && ( header->lsap.ssap == ETH_LSAP_GLSAP )){
  240.             // raw packet
  241.             // discard
  242.             return NULL;
  243.         }else if(( header->lsap.dsap == ETH_LSAP_SNAP ) && ( header->lsap.ssap == ETH_LSAP_SNAP )){
  244.             // IEEE 802.3 + 802.2 + LSAP + SNAP
  245.             // organization code not supported
  246.             type = ntohs( header->snap.ethertype );
  247.             prefix = sizeof( eth_header_t ) + sizeof( eth_header_lsap_t) + sizeof( eth_header_snap_t);
  248.         }else{
  249.             // IEEE 802.3 + 802.2 LSAP
  250.             type = lsap_map( header->lsap.dsap );
  251.             prefix = sizeof( eth_header_t ) + sizeof( eth_header_lsap_t);
  252.         }
  253.         suffix = ( type < ETH_MIN_CONTENT ) ? ETH_MIN_CONTENT - type : 0;
  254.         fcs = (( void * ) header ) + prefix + type + suffix;
  255.         suffix += length - prefix - type;
  256.     }else{
  257.         // invalid length/type, should not occurr
  258.         return NULL;
  259.     }
  260.     if( dummy ){
  261.         if(( ~ compute_crc32( ~ 0, & header->header.dest, ((( void * ) fcs ) - (( void * ) & header->header.dest )) * 8 )) != ntohl( * fcs )){
  262.             return NULL;
  263.         }
  264.     }
  265.     if( ERROR_OCCURRED( packet_set_addr( packet, header->header.src, header->header.dest, ETH_ADDR ))
  266.     || ERROR_OCCURRED( packet_trim( packet, prefix, suffix ))){
  267.         return NULL;
  268.     }
  269.     return eth_protos_find( & eth_globals.protos, type );
  270. }
  271.  
  272. int eth_receive_message( device_id_t device_id, packet_t packet ){
  273.     eth_proto_ref   proto;
  274.     packet_t        next;
  275.     eth_device_ref  device;
  276.     int             dummy;
  277.  
  278.     rwlock_read_lock( & eth_globals.devices_lock );
  279.     device = eth_devices_find( & eth_globals.devices, device_id );
  280.     if( ! device ){
  281.         rwlock_read_unlock( & eth_globals.devices_lock );
  282.         return ENOENT;
  283.     }
  284.     dummy = device->dummy;
  285.     rwlock_read_unlock( & eth_globals.devices_lock );
  286.     rwlock_read_lock( & eth_globals.protos_lock );
  287.     do{
  288.         next = pq_detach( packet );
  289.         proto = eth_proccess_packet( dummy, packet );
  290.         if( proto ){
  291.             async_msg_2( proto->phone, NET_IL_RECEIVED, device_id, packet_get_id( packet ));
  292.         }else{
  293.             // drop invalid/unknown
  294.             packet_release( eth_globals.networking_phone, packet_get_id( packet ));
  295.         }
  296.         packet = next;
  297.     }while( packet );
  298.     rwlock_read_unlock( & eth_globals.protos_lock );
  299.     return EOK;
  300. }
  301.  
  302. int eth_packet_space_message( device_id_t device_id, size_t * addr_len, size_t * prefix, size_t * content, size_t * suffix ){
  303.     eth_device_ref  device;
  304.  
  305.     if( !( addr_len && prefix && content && suffix )) return EINVAL;
  306.     rwlock_write_lock( & eth_globals.devices_lock );
  307.     device = eth_devices_find( & eth_globals.devices, device_id );
  308.     if( ! device ){
  309.         rwlock_write_unlock( & eth_globals.devices_lock );
  310.         return ENOENT;
  311.     }
  312.     * content = ( ETH_MAX_CONTENT > device->mtu ) ? device->mtu : ETH_MAX_CONTENT;
  313.     rwlock_write_unlock( & eth_globals.devices_lock );
  314.     * addr_len = ETH_ADDR;
  315.     * prefix = ETH_PREFIX;
  316.     * suffix = ETH_MIN_CONTENT + ETH_SUFFIX;
  317.     return EOK;
  318. }
  319.  
  320. int eth_addr_message( device_id_t device_id, eth_addr_type_t type, measured_string_ref * address ){
  321.     eth_device_ref  device;
  322.  
  323.     if( ! address ) return EINVAL;
  324.     if( type == ETH_BROADCAST_ADDR ){
  325.         * address = eth_globals.broadcast_addr;
  326.     }else{
  327.         rwlock_write_lock( & eth_globals.devices_lock );
  328.         device = eth_devices_find( & eth_globals.devices, device_id );
  329.         if( ! device ){
  330.             rwlock_write_unlock( & eth_globals.devices_lock );
  331.             return ENOENT;
  332.         }
  333.         * address = device->addr;
  334.         rwlock_write_unlock( & eth_globals.devices_lock );
  335.     }
  336.     return ( * address ) ? EOK : ENOENT;
  337. }
  338.  
  339. int eth_register_message( services_t service, int phone ){
  340.     ERROR_DECLARE;
  341.  
  342.     eth_proto_ref   proto;
  343.     int             protocol;
  344.  
  345.     protocol = protocol_map( SERVICE_ETHERNET, service );
  346.     if( ! protocol ) return ENOENT;
  347.     rwlock_write_lock( & eth_globals.protos_lock );
  348.     proto = eth_protos_find( & eth_globals.protos, protocol );
  349.     if( proto ){
  350.         proto->phone = phone;
  351.         rwlock_write_unlock( & eth_globals.protos_lock );
  352.         return EOK;
  353.     }else{
  354.         proto = ( eth_proto_ref ) malloc( sizeof( eth_proto_t ));
  355.         if( ! proto ){
  356.             rwlock_write_unlock( & eth_globals.protos_lock );
  357.             return ENOMEM;
  358.         }
  359.         proto->service = service;
  360.         proto->protocol = protocol;
  361.         proto->phone = phone;
  362.         if( ERROR_OCCURRED( eth_protos_add( & eth_globals.protos, protocol, proto ))){
  363.             rwlock_write_unlock( & eth_globals.protos_lock );
  364.             free( proto );
  365.             return ERROR_CODE;
  366.         }
  367.     }
  368.     printf( "\nNew protocol registered:\n\tprotocol\t= %d\n\tservice\t= %d\n\tphone\t= %d", proto->protocol, proto->service, proto->phone );
  369.     rwlock_write_unlock( & eth_globals.protos_lock );
  370.     return EOK;
  371. }
  372.  
  373. int eth_prepare_packet( int dummy, packet_t packet, uint8_t * src_addr, int ethertype ){
  374.     eth_header_ex_ref   header;
  375.     eth_fcs_ref         fcs;
  376.     uint8_t *           src;
  377.     uint8_t *           dest;
  378.     int                 length;
  379.     int                 i;
  380.     void *              padding;
  381.     eth_preamble_ref    preamble;
  382.  
  383.     if( dummy ){
  384.         preamble = PACKET_PREFIX( packet, eth_preamble_t );
  385.         if( ! preamble ) return ENOMEM;
  386.         for( i = 0; i < 7; ++ i ) preamble->preamble[ i ] = ETH_PREAMBLE;
  387.         preamble->sfd = ETH_SFD;
  388.     }
  389.     header = PACKET_PREFIX( packet, eth_header_ex_t );
  390.     if( ! header ) return ENOMEM;
  391.     length = packet_get_addr( packet, & src, & dest );
  392.     if( length < 0 ) return length;
  393.     if( length < ETH_ADDR ) return EINVAL;
  394.     memcpy( header->header.src, src_addr, ETH_ADDR );
  395.     memcpy( & header->header.dest, dest, ETH_ADDR );
  396.     length = packet_get_data_length( packet );
  397.     if( length > ETH_MAX_CONTENT ) return EINVAL;
  398.     if( length < ETH_MIN_CONTENT ){
  399.         padding = packet_suffix( packet, ETH_MIN_CONTENT - length );
  400.         if( ! padding ) return ENOMEM;
  401.         memset( padding, 0, ETH_MIN_CONTENT - length );
  402.     }
  403.     header->header.ethertype = htons( length );
  404.     header->lsap.dsap = 0xAA;
  405.     header->lsap.ssap = header->lsap.dsap;
  406.     header->lsap.ctrl = 0;
  407.     for( i = 0; i < 3; ++ i ) header->snap.proto[ i ] = 0;
  408.     header->snap.ethertype = ethertype;
  409.     if( dummy ){
  410.         fcs = PACKET_SUFFIX( packet, eth_fcs_t );
  411.         if( ! fcs ) return ENOMEM;
  412.         * fcs = htonl( ~ compute_crc32( ~ 0, & header->header.dest, ((( void * ) fcs ) - (( void * ) & header->header.dest )) * 8 ));
  413.     }
  414.     return EOK;
  415. }
  416.  
  417. int eth_send_message( device_id_t device_id, packet_t packet, services_t sender ){
  418.     ERROR_DECLARE;
  419.  
  420.     eth_device_ref      device;
  421.     packet_t            next;
  422.     packet_t            tmp;
  423.     int                 ethertype;
  424.  
  425.     ethertype = htons( protocol_map( SERVICE_ETHERNET, sender ));
  426.     if( ! ethertype ){
  427.         packet_release( eth_globals.networking_phone, packet_get_id( packet ));
  428.         return EINVAL;
  429.     }
  430.     rwlock_read_lock( & eth_globals.devices_lock );
  431.     device = eth_devices_find( & eth_globals.devices, device_id );
  432.     if( ! device ){
  433.         rwlock_read_unlock( & eth_globals.devices_lock );
  434.         return ENOENT;
  435.     }
  436.     // proccess packet queue
  437.     next = packet;
  438.     do{
  439.         if( ERROR_OCCURRED( eth_prepare_packet( device->dummy, next, ( uint8_t * ) device->addr->value, ethertype ))){
  440.             // release invalid packet
  441.             tmp = pq_detach( next );
  442.             packet_release( eth_globals.networking_phone, packet_get_id( next ));
  443.             next = tmp;
  444.         }else{
  445.             next = pq_next( next );
  446.         }
  447.     }while( next );
  448.     // send packet queue
  449.     async_msg_2( device->phone, NET_NETIF_SEND, device_id, packet_get_id( packet ));
  450.     rwlock_read_unlock( & eth_globals.devices_lock );
  451.     return EOK;
  452. }
  453.  
  454. int eth_message( ipc_callid_t callid, ipc_call_t * call, ipc_call_t * answer, int * answer_count ){
  455.     ERROR_DECLARE;
  456.  
  457.     measured_string_ref address;
  458.     packet_t            packet;
  459.  
  460.     * answer_count = 0;
  461.     switch( IPC_GET_METHOD( * call )){
  462.         case IPC_M_PHONE_HUNGUP:
  463.             return EOK;
  464.         case NET_NIL_DEVICE:
  465.             return eth_device_message( IPC_GET_DEVICE( call ), IPC_GET_SERVICE( call ), IPC_GET_MTU( call ));
  466.         case NET_NIL_SEND:
  467.             ERROR_PROPAGATE( packet_translate( eth_globals.networking_phone, & packet, IPC_GET_PACKET( call )));
  468.             return eth_send_message( IPC_GET_DEVICE( call ), packet, IPC_GET_SERVICE( call ));
  469.         case NET_NIL_PACKET_SPACE:
  470.             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 )));
  471.             * answer_count = 3;
  472.             return EOK;
  473.         case NET_NIL_ADDR:
  474.             rwlock_read_lock( & eth_globals.devices_lock );
  475.             if( ! ERROR_OCCURRED( eth_addr_message( IPC_GET_DEVICE( call ), ETH_LOCAL_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 NET_NIL_BROADCAST_ADDR:
  481.             rwlock_read_lock( & eth_globals.devices_lock );
  482.             if( ! ERROR_OCCURRED( eth_addr_message( IPC_GET_DEVICE( call ), ETH_BROADCAST_ADDR, & address ))){
  483.                  ERROR_CODE = measured_strings_reply( address, 1 );
  484.             }
  485.             rwlock_read_unlock( & eth_globals.devices_lock );
  486.             return ERROR_CODE;
  487.         case IPC_M_CONNECT_TO_ME:
  488.             return eth_register_message( IPC_GET_PROTO( call ), IPC_GET_PHONE( call ));
  489.     }
  490.     return ENOTSUP;
  491. }
  492.  
  493. void eth_receiver( ipc_callid_t iid, ipc_call_t * icall ){
  494.     ERROR_DECLARE;
  495.  
  496.     packet_t        packet;
  497.  
  498.     while( true ){
  499.         switch( IPC_GET_METHOD( * icall )){
  500.             case NET_NIL_DEVICE_STATE:
  501.                 //TODO clear device if off?
  502.                 break;
  503.             case NET_NIL_RECEIVED:
  504.                 if( ! ERROR_OCCURRED( packet_translate( eth_globals.networking_phone, & packet, IPC_GET_PACKET( icall )))){
  505.                     ERROR_CODE = eth_receive_message( IPC_GET_DEVICE( icall ), packet );
  506.                 }
  507.                 ipc_answer_0( iid, ERROR_CODE );
  508.                 break;
  509.             default:
  510.                 ipc_answer_0( iid, ENOTSUP );
  511.         }
  512.         iid = async_get_call( icall );
  513.     }
  514. }
  515.  
  516. /** @}
  517.  */
  518.