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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.  *  Network interface module skeleton implementation.
  35.  *  @see netif.h
  36.  */
  37.  
  38. #include <async.h>
  39. #include <mem.h>
  40. #include <fibril_sync.h>
  41. #include <stdio.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 "../structures/packet/packet.h"
  51. #include "../structures/packet/packet_client.h"
  52. #include "../structures/measured_strings.h"
  53.  
  54. #include "../include/device.h"
  55. #include "../include/netif_interface.h"
  56. #include "../include/nil_interface.h"
  57.  
  58. #include "netif.h"
  59. #include "netif_messages.h"
  60. #include "netif_module.h"
  61.  
  62. /** Network interface module global data.
  63.  */
  64. extern netif_globals_t netif_globals;
  65.  
  66. DEVICE_MAP_IMPLEMENT( device_map, device_t )
  67.  
  68. /** Registers the device notification receiver, the network interface layer module.
  69.  *  @param device_id The device identifier. Input parameter.
  70.  *  @param phone The network interface layer module phone. Input parameter.
  71.  *  @returns EOK on success.
  72.  *  @returns ENOENT if there is no such device.
  73.  *  @returns ELIMIT if there is another module registered.
  74.  */
  75. int register_message( device_id_t device_id, int phone );
  76.  
  77. int netif_probe_req( int netif_phone, device_id_t device_id, int irq, int io ){
  78.     int result;
  79.  
  80.     fibril_rwlock_write_lock( & netif_globals.lock );
  81.     result = netif_probe_message( device_id, irq, io );
  82.     fibril_rwlock_write_unlock( & netif_globals.lock );
  83.     return result;
  84. }
  85.  
  86. int netif_send_msg( int netif_phone, device_id_t device_id, packet_t packet, services_t sender ){
  87.     int result;
  88.  
  89.     fibril_rwlock_write_lock( & netif_globals.lock );
  90.     result = netif_send_message( device_id, packet, sender );
  91.     fibril_rwlock_write_unlock( & netif_globals.lock );
  92.     return result;
  93. }
  94.  
  95. int netif_start_req( int netif_phone, device_id_t device_id ){
  96.     ERROR_DECLARE;
  97.  
  98.     device_ref  device;
  99.     int result;
  100.     int phone;
  101.  
  102.     fibril_rwlock_write_lock( & netif_globals.lock );
  103.     if( ERROR_OCCURRED( find_device( device_id, & device ))){
  104.         fibril_rwlock_write_unlock( & netif_globals.lock );
  105.         return ERROR_CODE;
  106.     }
  107.     result = netif_start_message( device );
  108.     if( result > NETIF_NULL ){
  109.         phone = device->nil_phone;
  110.         fibril_rwlock_write_unlock( & netif_globals.lock );
  111.         nil_device_state_msg( phone, device_id, result );
  112.         return EOK;
  113.     }else{
  114.         fibril_rwlock_write_unlock( & netif_globals.lock );
  115.     }
  116.     return result;
  117. }
  118.  
  119. int netif_stop_req( int netif_phone, device_id_t device_id ){
  120.     ERROR_DECLARE;
  121.  
  122.     device_ref  device;
  123.     int result;
  124.     int phone;
  125.  
  126.     fibril_rwlock_write_lock( & netif_globals.lock );
  127.     if( ERROR_OCCURRED( find_device( device_id, & device ))){
  128.         fibril_rwlock_write_unlock( & netif_globals.lock );
  129.         return ERROR_CODE;
  130.     }
  131.     result = netif_stop_message( device );
  132.     if( result > NETIF_NULL ){
  133.         phone = device->nil_phone;
  134.         fibril_rwlock_write_unlock( & netif_globals.lock );
  135.         nil_device_state_msg( phone, device_id, result );
  136.         return EOK;
  137.     }else{
  138.         fibril_rwlock_write_unlock( & netif_globals.lock );
  139.     }
  140.     return result;
  141. }
  142.  
  143. int netif_get_addr( int netif_phone, device_id_t device_id, measured_string_ref * address, char ** data ){
  144.     ERROR_DECLARE;
  145.  
  146.     measured_string_t   translation;
  147.  
  148.     if( !( address && data )) return EBADMEM;
  149.     fibril_rwlock_read_lock( & netif_globals.lock );
  150.     if( ! ERROR_OCCURRED( netif_get_addr_message( device_id, & translation ))){
  151.         * address = measured_string_copy( & translation );
  152.         ERROR_CODE = ( * address ) ? EOK : ENOMEM;
  153.     }
  154.     fibril_rwlock_read_unlock( & netif_globals.lock );
  155.     * data = ( ** address ).value;
  156.     return ERROR_CODE;
  157. }
  158.  
  159. int netif_bind_service( services_t service, device_id_t device_id, services_t me, async_client_conn_t receiver ){
  160.     return EOK;
  161. }
  162.  
  163. int find_device( device_id_t device_id, device_ref * device ){
  164.     if( ! device ) return EBADMEM;
  165.     * device = device_map_find( & netif_globals.device_map, device_id );
  166.     if( ! * device ) return ENOENT;
  167.     if(( ** device ).state == NETIF_NULL ) return EPERM;
  168.     return EOK;
  169. }
  170.  
  171. void null_device_stats( device_stats_ref stats ){
  172.     bzero( stats, sizeof( device_stats_t ));
  173. }
  174.  
  175. int register_message( device_id_t device_id, int phone ){
  176.     ERROR_DECLARE;
  177.  
  178.     device_ref  device;
  179.  
  180.     ERROR_PROPAGATE( find_device( device_id, & device ));
  181.     if( device->nil_phone > 0 ) return ELIMIT;
  182.     device->nil_phone = phone;
  183.     printf( "New receiver of the device %d registered:\n\tphone\t= %d\n", device->device_id, device->nil_phone );
  184.     return EOK;
  185. }
  186.  
  187. int netif_message( ipc_callid_t callid, ipc_call_t * call, ipc_call_t * answer, int * answer_count ){
  188.     ERROR_DECLARE;
  189.  
  190.     size_t              length;
  191.     device_stats_t      stats;
  192.     packet_t            packet;
  193.     measured_string_t   address;
  194.  
  195. //  printf( "message %d - %d\n", IPC_GET_METHOD( * call ), NET_NETIF_FIRST );
  196.     * answer_count = 0;
  197.     switch( IPC_GET_METHOD( * call )){
  198.         case IPC_M_PHONE_HUNGUP:
  199.             return EOK;
  200.         case NET_NETIF_PROBE_AUTO:
  201.             fibril_rwlock_write_lock( & netif_globals.lock );
  202.             ERROR_CODE = netif_probe_auto_message();
  203.             fibril_rwlock_write_unlock( & netif_globals.lock );
  204.             return ERROR_CODE;
  205.         case NET_NETIF_PROBE:
  206.             return netif_probe_req( 0, IPC_GET_DEVICE( call ), NETIF_GET_IRQ( call ), NETIF_GET_IO( call ));
  207.         case IPC_M_CONNECT_TO_ME:
  208.             fibril_rwlock_write_lock( & netif_globals.lock );
  209.             ERROR_CODE = register_message( IPC_GET_DEVICE( call ), IPC_GET_PHONE( call ));
  210.             fibril_rwlock_write_unlock( & netif_globals.lock );
  211.             return ERROR_CODE;
  212.         case NET_NETIF_SEND:
  213.             ERROR_PROPAGATE( packet_translate( netif_globals.net_phone, & packet, IPC_GET_PACKET( call )));
  214.             return netif_send_msg( 0, IPC_GET_DEVICE( call ), packet, IPC_GET_SENDER( call ));
  215.         case NET_NETIF_START:
  216.             return netif_start_req( 0, IPC_GET_DEVICE( call ));
  217.         case NET_NETIF_STATS:
  218.             fibril_rwlock_read_lock( & netif_globals.lock );
  219.             if( ! ERROR_OCCURRED( ipc_data_read_receive( & callid, & length ))){
  220.                 if( length < sizeof( device_stats_t )){
  221.                     ERROR_CODE = EOVERFLOW;
  222.                 }else{
  223.                     if( ! ERROR_OCCURRED( netif_get_device_stats( IPC_GET_DEVICE( call ), & stats ))){
  224.                         ERROR_CODE = ipc_data_read_finalize( callid, & stats, sizeof( device_stats_t ));
  225.                     }
  226.                 }
  227.             }
  228.             fibril_rwlock_read_unlock( & netif_globals.lock );
  229.             return ERROR_CODE;
  230.         case NET_NETIF_STOP:
  231.             return netif_stop_req( 0, IPC_GET_DEVICE( call ));
  232.         case NET_NETIF_GET_ADDR:
  233.             fibril_rwlock_read_lock( & netif_globals.lock );
  234.             if( ! ERROR_OCCURRED( netif_get_addr_message( IPC_GET_DEVICE( call ), & address ))){
  235.                 ERROR_CODE = measured_strings_reply( & address, 1 );
  236.             }
  237.             fibril_rwlock_read_unlock( & netif_globals.lock );
  238.             return ERROR_CODE;
  239.     }
  240.     return netif_specific_message( callid, call, answer, answer_count );
  241. }
  242.  
  243. int netif_init_module( async_client_conn_t client_connection ){
  244.     ERROR_DECLARE;
  245.  
  246.     async_set_client_connection( client_connection );
  247.     netif_globals.net_phone = connect_to_service( SERVICE_NETWORKING );
  248.     device_map_initialize( & netif_globals.device_map );
  249.     ERROR_PROPAGATE( pm_init());
  250.     fibril_rwlock_initialize( & netif_globals.lock );
  251.     if( ERROR_OCCURRED( netif_initialize())){
  252.         pm_destroy();
  253.         return ERROR_CODE;
  254.     }
  255.     return EOK;
  256. }
  257.  
  258. int netif_run_module( void ){
  259.     async_manager();
  260.  
  261.     pm_destroy();
  262.     return EOK;
  263. }
  264.  
  265. void netif_pq_release( packet_id_t packet_id ){
  266.     pq_release( netif_globals.net_phone, packet_id );
  267. }
  268.  
  269. packet_t netif_packet_get_1( size_t content ){
  270.     return packet_get_1( netif_globals.net_phone, content );
  271. }
  272.  
  273. /** @}
  274.  */
  275.