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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 netif
  30.  *  @{
  31.  */
  32.  
  33. /** @file
  34.  */
  35.  
  36. #include <async.h>
  37. #include <mem.h>
  38. #include <rwlock.h>
  39. #include <stdio.h>
  40.  
  41. #include <ipc/ipc.h>
  42. #include <ipc/services.h>
  43.  
  44. #include "../err.h"
  45. #include "../messages.h"
  46. #include "../modules.h"
  47.  
  48. #include "../structures/packet/packet.h"
  49. #include "../structures/packet/packet_client.h"
  50. #include "../structures/measured_strings.h"
  51.  
  52. #include "../include/device.h"
  53. #include "../include/netif_interface.h"
  54. #include "../include/nil_interface.h"
  55.  
  56. #include "netif.h"
  57. #include "netif_messages.h"
  58. #include "netif_module.h"
  59.  
  60. extern netif_globals_t netif_globals;
  61.  
  62. DEVICE_MAP_IMPLEMENT( device_map, device_t )
  63.  
  64. int register_message( device_id_t device_id, int phone );
  65.  
  66. int netif_probe_req( int netif_phone, device_id_t device_id, int irq, int io ){
  67.     int result;
  68.  
  69.     rwlock_write_lock( & netif_globals.lock );
  70.     result = netif_probe_message( device_id, irq, io );
  71.     rwlock_write_unlock( & netif_globals.lock );
  72.     return result;
  73. }
  74.  
  75. int netif_send_msg( int netif_phone, device_id_t device_id, packet_t packet, services_t sender ){
  76.     int result;
  77.  
  78.     rwlock_write_lock( & netif_globals.lock );
  79.     result = netif_send_message( device_id, packet, sender );
  80.     rwlock_write_unlock( & netif_globals.lock );
  81.     return result;
  82. }
  83.  
  84. int netif_start_req( int netif_phone, device_id_t device_id ){
  85.     ERROR_DECLARE;
  86.  
  87.     device_ref  device;
  88.     int result;
  89.     int phone;
  90.  
  91.     rwlock_write_lock( & netif_globals.lock );
  92.     if( ERROR_OCCURRED( find_device( device_id, & device ))){
  93.         rwlock_write_unlock( & netif_globals.lock );
  94.         return ERROR_CODE;
  95.     }
  96.     result = netif_start_message( device );
  97.     if( result > NETIF_NULL ){
  98.         phone = device->nil_phone;
  99.         rwlock_write_unlock( & netif_globals.lock );
  100.         nil_device_state_msg( phone, device_id, result );
  101.         return EOK;
  102.     }else{
  103.         rwlock_write_unlock( & netif_globals.lock );
  104.     }
  105.     return result;
  106. }
  107.  
  108. int netif_stop_req( int netif_phone, device_id_t device_id ){
  109.     ERROR_DECLARE;
  110.  
  111.     device_ref  device;
  112.     int result;
  113.     int phone;
  114.  
  115.     rwlock_write_lock( & netif_globals.lock );
  116.     if( ERROR_OCCURRED( find_device( device_id, & device ))){
  117.         rwlock_write_unlock( & netif_globals.lock );
  118.         return ERROR_CODE;
  119.     }
  120.     result = netif_stop_message( device );
  121.     if( result > NETIF_NULL ){
  122.         phone = device->nil_phone;
  123.         rwlock_write_unlock( & netif_globals.lock );
  124.         nil_device_state_msg( phone, device_id, result );
  125.         return EOK;
  126.     }else{
  127.         rwlock_write_unlock( & netif_globals.lock );
  128.     }
  129.     return result;
  130. }
  131.  
  132. int netif_get_addr( int netif_phone, device_id_t device_id, measured_string_ref * address, char ** data ){
  133.     ERROR_DECLARE;
  134.  
  135.     measured_string_t   translation;
  136.  
  137.     if( !( address && data )) return EBADMEM;
  138.     rwlock_read_lock( & netif_globals.lock );
  139.     if( ! ERROR_OCCURRED( netif_get_addr_message( device_id, & translation ))){
  140.         * address = measured_string_copy( & translation );
  141.         ERROR_CODE = ( * address ) ? EOK : ENOMEM;
  142.     }
  143.     rwlock_read_unlock( & netif_globals.lock );
  144.     * data = ( ** address ).value;
  145.     return ERROR_CODE;
  146. }
  147.  
  148. int netif_bind_service( services_t service, device_id_t device_id, services_t me, async_client_conn_t receiver ){
  149.     return EOK;
  150. }
  151.  
  152. int find_device( device_id_t device_id, device_ref * device ){
  153.     if( ! device ) return EBADMEM;
  154.     * device = device_map_find( & netif_globals.device_map, device_id );
  155.     if( ! * device ) return ENOENT;
  156.     if(( ** device ).state == NETIF_NULL ) return EPERM;
  157.     return EOK;
  158. }
  159.  
  160. void null_device_stats( device_stats_ref stats ){
  161.     bzero( stats, sizeof( device_stats_t ));
  162. }
  163.  
  164. int register_message( device_id_t device_id, int phone ){
  165.     ERROR_DECLARE;
  166.  
  167.     device_ref  device;
  168.  
  169.     ERROR_PROPAGATE( find_device( device_id, & device ));
  170.     if( device->nil_phone > 0 ) return ELIMIT;
  171.     device->nil_phone = phone;
  172.     printf( "New receiver of the device %d registered:\n\tphone\t= %d\n", device->device_id, device->nil_phone );
  173.     return EOK;
  174. }
  175.  
  176. int netif_message( ipc_callid_t callid, ipc_call_t * call, ipc_call_t * answer, int * answer_count ){
  177.     ERROR_DECLARE;
  178.  
  179.     size_t              length;
  180.     device_stats_t      stats;
  181.     packet_t            packet;
  182.     measured_string_t   address;
  183.  
  184. //  printf( "message %d - %d\n", IPC_GET_METHOD( * call ), NET_NETIF_FIRST );
  185.     * answer_count = 0;
  186.     switch( IPC_GET_METHOD( * call )){
  187.         case IPC_M_PHONE_HUNGUP:
  188.             return EOK;
  189.         case NET_NETIF_PROBE_AUTO:
  190.             rwlock_write_lock( & netif_globals.lock );
  191.             ERROR_CODE = netif_probe_auto_message();
  192.             rwlock_write_unlock( & netif_globals.lock );
  193.             return ERROR_CODE;
  194.         case NET_NETIF_PROBE:
  195.             return netif_probe_req( 0, IPC_GET_DEVICE( call ), NETIF_GET_IRQ( call ), NETIF_GET_IO( call ));
  196.         case IPC_M_CONNECT_TO_ME:
  197.             rwlock_write_lock( & netif_globals.lock );
  198.             ERROR_CODE = register_message( IPC_GET_DEVICE( call ), IPC_GET_PHONE( call ));
  199.             rwlock_write_unlock( & netif_globals.lock );
  200.             return ERROR_CODE;
  201.         case NET_NETIF_SEND:
  202.         case NET_NIL_SEND:
  203.             ERROR_PROPAGATE( packet_translate( netif_globals.net_phone, & packet, IPC_GET_PACKET( call )));
  204.             return netif_send_msg( 0, IPC_GET_DEVICE( call ), packet, IPC_GET_SENDER( call ));
  205.         case NET_NETIF_START:
  206.             return netif_start_req( 0, IPC_GET_DEVICE( call ));
  207.         case NET_NETIF_STATS:
  208.             rwlock_read_lock( & netif_globals.lock );
  209.             if( ! ERROR_OCCURRED( ipc_data_read_receive( & callid, & length ))){
  210.                 if( length < sizeof( device_stats_t )){
  211.                     ERROR_CODE = EOVERFLOW;
  212.                 }else{
  213.                     if( ! ERROR_OCCURRED( netif_get_device_stats( IPC_GET_DEVICE( call ), & stats ))){
  214.                         ERROR_CODE = ipc_data_read_finalize( callid, & stats, sizeof( device_stats_t ));
  215.                     }
  216.                 }
  217.             }
  218.             rwlock_read_unlock( & netif_globals.lock );
  219.             return ERROR_CODE;
  220.         case NET_NETIF_STOP:
  221.             return netif_stop_req( 0, IPC_GET_DEVICE( call ));
  222.         case NET_NETIF_GET_ADDR:
  223.         case NET_NIL_ADDR:
  224.             rwlock_read_lock( & netif_globals.lock );
  225.             if( ! ERROR_OCCURRED( netif_get_addr_message( IPC_GET_DEVICE( call ), & address ))){
  226.                 ERROR_CODE = measured_strings_reply( & address, 1 );
  227.             }
  228.             rwlock_read_unlock( & netif_globals.lock );
  229.             return ERROR_CODE;
  230.     }
  231.     return netif_specific_message( callid, call, answer, answer_count );
  232. }
  233.  
  234. int netif_init_module( async_client_conn_t client_connection ){
  235.     ERROR_DECLARE;
  236.  
  237.     async_set_client_connection( client_connection );
  238.     netif_globals.net_phone = connect_to_service( SERVICE_NETWORKING );
  239.     device_map_initialize( & netif_globals.device_map );
  240.     ERROR_PROPAGATE( pm_init());
  241.     rwlock_initialize( & netif_globals.lock );
  242.     if( ERROR_OCCURRED( netif_initialize())){
  243.         pm_destroy();
  244.         return ERROR_CODE;
  245.     }
  246.     return EOK;
  247. }
  248.  
  249. int netif_run_module( void ){
  250.     async_manager();
  251.  
  252.     pm_destroy();
  253.     return EOK;
  254. }
  255.  
  256. void netif_pq_release( packet_id_t packet_id ){
  257.     pq_release( netif_globals.net_phone, packet_id );
  258. }
  259.  
  260. packet_t netif_packet_get_1( size_t content ){
  261.     return packet_get_1( netif_globals.net_phone, content );
  262. }
  263.  
  264. /** @}
  265.  */
  266.