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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 net
  30.  *  @{
  31.  */
  32.  
  33. /** @file
  34.  *  Networking subsystem central module implementation.
  35.  */
  36.  
  37. #include <async.h>
  38. #include <ctype.h>
  39. #include <ddi.h>
  40. #include <errno.h>
  41. #include <malloc.h>
  42. #include <stdio.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. //#include "../self_test.h"
  51.  
  52. #include "../structures/char_map.h"
  53. #include "../structures/generic_char_map.h"
  54. #include "../structures/measured_strings.h"
  55. #include "../structures/module_map.h"
  56. #include "../structures/packet/packet.h"
  57.  
  58. #include "../il/il_messages.h"
  59. #include "../include/device.h"
  60. #include "../include/netif_interface.h"
  61. #include "../include/nil_interface.h"
  62. #include "../include/net_interface.h"
  63. #include "../include/ip_interface.h"
  64.  
  65. #include "net.h"
  66.  
  67. /** Networking module name.
  68.  */
  69. #define NAME    "Networking"
  70.  
  71. /** Prints the module name.
  72.  *  @see NAME
  73.  */
  74. void    module_print_name( void );
  75.  
  76. /** Starts the networking module.
  77.  *  Initializes the client connection serving function, initializes the module, registers the module service and starts the async manager, processing IPC messages in an infinite loop.
  78.  *  @param client_connection The client connection processing function. The module skeleton propagates its own one. Input parameter.
  79.  *  @returns EOK on successful module termination.
  80.  *  @returns Other error codes as defined for the net_initialize() function.
  81.  *  @returns Other error codes as defined for the REGISTER_ME() macro function.
  82.  */
  83. int module_start( async_client_conn_t client_connection );
  84.  
  85. //int       parse_line( measured_strings_ref configuration, char * line );
  86.  
  87. /** Reads the networking subsystem global configuration.
  88.  *  @returns EOK on success.
  89.  *  @returns Other error codes as defined for the add_configuration() function.
  90.  */
  91. int     read_configuration( void );
  92.  
  93. /** Starts the network interface according to its configuration.
  94.  *  Registers the network interface with the subsystem modules.
  95.  *  Starts the needed subsystem modules.
  96.  *  @param netif The network interface specific data.
  97.  *  @returns EOK on success.
  98.  *  @returns EINVAL if there are some settings missing.
  99.  *  @returns ENOENT if the internet protocol module is not known.
  100.  *  @returns Other error codes as defined for the netif_probe_req() function.
  101.  *  @returns Other error codes as defined for the nil_device_req() function.
  102.  *  @returns Other error codes as defined for the needed internet layer registering function.
  103.  */
  104. int     start_device( netif_ref netif );
  105.  
  106. /** Reads the configuration and starts all network interfaces.
  107.  *  @returns EOK on success.
  108.  *  @returns EXDEV if there is no available system-unique device identifier.
  109.  *  @returns EINVAL if any of the network interface names are not configured.
  110.  *  @returns ENOMEM if there is not enough memory left.
  111.  *  @returns Other error codes as defined for the read_configuration() function.
  112.  *  @returns Other error codes as defined for the read_netif_configuration() function.
  113.  *  @returns Other error codes as defined for the start_device() function.
  114.  */
  115. int     startup( void );
  116.  
  117. /** Generates new system-unique device identifier.
  118.  *  @returns The system-unique devic identifier.
  119.  */
  120. device_id_t generate_new_device_id( void );
  121.  
  122. /** Returns the configured values.
  123.  *  The network interface configuration is searched first.
  124.  *  @param netif_conf The network interface configuration setting. Input parameter.
  125.  *  @param configuration The found configured values. Output parameter.
  126.  *  @param count The desired settings count. Input parameter.
  127.  *  @param data The found configuration settings data. Output parameter.
  128.  *  @returns EOK.
  129.  */
  130. int net_get_conf( measured_strings_ref netif_conf, measured_string_ref configuration, size_t count, char ** data );
  131.  
  132. /** Networking module global data.
  133.  */
  134. net_globals_t   net_globals;
  135.  
  136. DEVICE_MAP_IMPLEMENT( netifs, netif_t )
  137.  
  138. GENERIC_CHAR_MAP_IMPLEMENT( measured_strings, measured_string_t )
  139.  
  140. void module_print_name( void ){
  141.     printf( "%s", NAME );
  142. }
  143.  
  144. int module_start( async_client_conn_t client_connection ){
  145.     ERROR_DECLARE;
  146.  
  147.     ipcarg_t    phonehash;
  148.  
  149.     async_set_client_connection( client_connection );
  150.     ERROR_PROPAGATE( pm_init());
  151.     if( ERROR_OCCURRED( net_initialize( client_connection ))
  152.     || ERROR_OCCURRED( REGISTER_ME( SERVICE_NETWORKING, & phonehash ))){
  153.         pm_destroy();
  154.         return ERROR_CODE;
  155.     }
  156.  
  157.     async_manager();
  158.  
  159.     pm_destroy();
  160.     return EOK;
  161. }
  162.  
  163. int net_get_device_conf_req( int net_phone, device_id_t device_id, measured_string_ref * configuration, size_t count, char ** data ){
  164.     netif_ref   netif;
  165.  
  166.     if( !( configuration && ( count > 0 ))) return EINVAL;
  167.     netif = netifs_find( & net_globals.netifs, device_id );
  168.     if( netif ){
  169.         return net_get_conf( & netif->configuration, * configuration, count, data );
  170.     }else{
  171.         return net_get_conf( NULL, * configuration, count, data );
  172.     }
  173. }
  174.  
  175. int net_get_conf_req( int net_phone, measured_string_ref * configuration, size_t count, char ** data ){
  176.     if( !( configuration && ( count > 0 ))) return EINVAL;
  177.     return net_get_conf( NULL, * configuration, count, data );
  178. }
  179.  
  180. int net_get_conf( measured_strings_ref netif_conf, measured_string_ref configuration, size_t count, char ** data ){
  181.     measured_string_ref setting;
  182.     size_t              index;
  183.  
  184.     if( data ) * data = NULL;
  185.     for( index = 0; index < count; ++ index ){
  186.         setting = measured_strings_find( netif_conf, configuration[ index ].value, 0 );
  187.         if( ! setting ){
  188.             setting = measured_strings_find( & net_globals.configuration, configuration[ index ].value, 0 );
  189.         }
  190.         if( setting ){
  191.             configuration[ index ].length = setting->length;
  192.             configuration[ index ].value = setting->value;
  193.         }else{
  194.             configuration[ index ].length = 0;
  195.             configuration[ index ].value = NULL;
  196.         }
  197.     }
  198.     return EOK;
  199. }
  200.  
  201. void net_free_settings( measured_string_ref settings, char * data ){
  202. }
  203.  
  204. int net_connect_module( services_t service ){
  205.     return EOK;
  206. }
  207.  
  208. int net_message( ipc_callid_t callid, ipc_call_t * call, ipc_call_t * answer, int * answer_count ){
  209.     ERROR_DECLARE;
  210.  
  211.     measured_string_ref strings;
  212.     char *              data;
  213.  
  214.     * answer_count = 0;
  215.     switch( IPC_GET_METHOD( * call )){
  216.         case IPC_M_PHONE_HUNGUP:
  217.             return EOK;
  218.         case NET_NET_DEVICE:
  219.             // TODO configure, register
  220.             printf( "Networking: new netif %d\n", IPC_GET_DEVICE( call ));
  221.             return EOK;
  222.         case NET_NET_GET_DEVICE_CONF:
  223.             ERROR_PROPAGATE( measured_strings_receive( & strings, & data, IPC_GET_COUNT( call )));
  224.             net_get_device_conf_req( 0, IPC_GET_DEVICE( call ), & strings, IPC_GET_COUNT( call ), NULL );
  225.             // strings should not contain received data anymore
  226.             free( data );
  227.             ERROR_CODE = measured_strings_reply( strings, IPC_GET_COUNT( call ));
  228.             free( strings );
  229.             return ERROR_CODE;
  230.         case NET_NET_GET_CONF:
  231.             ERROR_PROPAGATE( measured_strings_receive( & strings, & data, IPC_GET_COUNT( call )));
  232.             net_get_conf_req( 0, & strings, IPC_GET_COUNT( call ), NULL );
  233.             // strings should not contain received data anymore
  234.             free( data );
  235.             ERROR_CODE = measured_strings_reply( strings, IPC_GET_COUNT( call ));
  236.             free( strings );
  237.             return ERROR_CODE;
  238.         case NET_NET_STARTUP:
  239.             return startup();
  240.     }
  241.     return ENOTSUP;
  242. }
  243.  
  244. /*
  245. int parse_line( measured_strings_ref configuration, char * line ){
  246.     ERROR_DECLARE;
  247.  
  248.     measured_string_ref setting;
  249.     char *          name;
  250.     char *          value;
  251.  
  252.     // from the beginning
  253.     name = line;
  254.     // skip spaces
  255.     while( isspace( * name )) ++ name;
  256.     // remember the name start
  257.     value = name;
  258.     // skip the name
  259.     while( isalnum( * value ) || ( * value == '_' )){
  260.         // make uppercase
  261. //      * value = toupper( * value );
  262.         ++ value;
  263.     }
  264.     if( * value == '=' ){
  265.         // terminate the name
  266.         * value = '\0';
  267.     }else{
  268.         // terminate the name
  269.         * value = '\0';
  270.         // skip until '='
  271.         ++ value;
  272.         while(( * value ) && ( * value != '=' )) ++ value;
  273.         // not found?
  274.         if( * value != '=' ) return EINVAL;
  275.     }
  276.     ++ value;
  277.     // skip spaces
  278.     while( isspace( * value )) ++ value;
  279.     // create a bulk measured string till the end
  280.     setting = measured_string_create_bulk( value, -1 );
  281.     if( ! setting ) return ENOMEM;
  282.     // add the configuration setting
  283.     if( ERROR_OCCURRED( measured_strings_add( configuration, name, 0, setting ))){
  284.         free( setting );
  285.         return ERROR_CODE;
  286.     }
  287.     return EOK;
  288. }
  289. */
  290.  
  291. int add_configuration( measured_strings_ref configuration, const char * name, const char * value ){
  292.     ERROR_DECLARE;
  293.  
  294.     measured_string_ref setting;
  295.  
  296.     setting = measured_string_create_bulk( value, 0 );
  297.     if( ! setting ) return ENOMEM;
  298.     // add the configuration setting
  299.     if( ERROR_OCCURRED( measured_strings_add( configuration, name, 0, setting ))){
  300.         free( setting );
  301.         return ERROR_CODE;
  302.     }
  303.     return EOK;
  304. }
  305.  
  306. device_id_t generate_new_device_id( void ){
  307.     return device_assign_devno();
  308. }
  309.  
  310. int read_configuration( void ){
  311.     ERROR_DECLARE;
  312.  
  313.     // read general configuration
  314.     ERROR_PROPAGATE( add_configuration( & net_globals.configuration, "IPV", "4" ));
  315.     ERROR_PROPAGATE( add_configuration( & net_globals.configuration, "MTU", "1500" ));
  316.     return EOK;
  317. }
  318.  
  319. int start_device( netif_ref netif ){
  320.     ERROR_DECLARE;
  321.  
  322.     measured_string_ref setting;
  323.     services_t          internet_service;
  324.     int                 irq;
  325.     int                 io;
  326.     int                 mtu;
  327.  
  328.     // mandatory netif
  329.     setting = measured_strings_find( & netif->configuration, CONF_NETIF, 0 );
  330.     netif->driver = get_running_module( & net_globals.modules, setting->value );
  331.     if( ! netif->driver ){
  332.         printf( "Failed to start the network interface driver %s\n", setting->value );
  333.         return EINVAL;
  334.     }
  335.     // optional network interface layer
  336.     setting = measured_strings_find( & netif->configuration, CONF_NIL, 0 );
  337.     if( setting ){
  338.         netif->nil = get_running_module( & net_globals.modules, setting->value );
  339.         if( ! netif->nil ){
  340.             printf( "Failed to start the network interface layer %s\n", setting->value );
  341.             return EINVAL;
  342.         }
  343.     }else{
  344.         netif->nil = NULL;
  345.     }
  346.     // mandatory internet layer
  347.     setting = measured_strings_find( & netif->configuration, CONF_IL, 0 );
  348.     netif->il = get_running_module( & net_globals.modules, setting->value );
  349.     if( ! netif->il ){
  350.         printf( "Failed to start the internet layer %s\n", setting->value );
  351.         return EINVAL;
  352.     }
  353.     // end of the static loopback initialization
  354.     // startup the loopback interface
  355.     setting = measured_strings_find( & netif->configuration, CONF_IRQ, 0 );
  356.     irq = setting ? strtol( setting->value, NULL, 10 ) : 0;
  357.     setting = measured_strings_find( & netif->configuration, CONF_IO, 0 );
  358.     io = setting ? strtol( setting->value, NULL, 16 ) : 0;
  359.     ERROR_PROPAGATE( netif_probe_req( netif->driver->phone, netif->id, irq, io ));
  360.     if( netif->nil ){
  361.         setting = measured_strings_find( & netif->configuration, CONF_MTU, 0 );
  362.         if( ! setting ){
  363.             setting = measured_strings_find( & net_globals.configuration, CONF_MTU, 0 );
  364.         }
  365.         mtu = setting ? strtol( setting->value, NULL, 10 ) : 0;
  366.         ERROR_PROPAGATE( nil_device_req( netif->nil->phone, netif->id, mtu, netif->driver->service ));
  367.         internet_service = netif->nil->service;
  368.     }else{
  369.         internet_service = netif->driver->service;
  370.     }
  371.     switch( netif->il->service ){
  372.         case SERVICE_IP:
  373.             ERROR_PROPAGATE( ip_device_req( netif->il->phone, netif->id, internet_service ));
  374.             break;
  375.         default:
  376.             return ENOENT;
  377.     }
  378.     ERROR_PROPAGATE( netif_start_req( netif->driver->phone, netif->id ));
  379.     return EOK;
  380. }
  381.  
  382. int startup( void ){
  383.     ERROR_DECLARE;
  384.  
  385.     char *      conf_files[] = { "lo", "ne2k" };
  386.     int         count = sizeof( conf_files ) / sizeof( char * );
  387.     int         index;
  388.     netif_ref   netif;
  389.     int         i;
  390.     measured_string_ref setting;
  391.  
  392.     // TODO dynamic configuration
  393.     ERROR_PROPAGATE( read_configuration());
  394.  
  395.     for( i = 0; i < count; ++ i ){
  396.         netif = ( netif_ref ) malloc( sizeof( netif_t ));
  397.         if( ! netif ) return ENOMEM;
  398.  
  399.         netif->id = generate_new_device_id();
  400.         if( ! netif->id ) return EXDEV;
  401.         ERROR_PROPAGATE( measured_strings_initialize( & netif->configuration ));
  402.         // read configuration files
  403.         if( ERROR_OCCURRED( read_netif_configuration( conf_files[ i ], netif ))){
  404.             measured_strings_destroy( & netif->configuration );
  405.             free( netif );
  406.             return ERROR_CODE;
  407.         }
  408.         // mandatory name
  409.         setting = measured_strings_find( & netif->configuration, CONF_NAME, 0 );
  410.         if( ! setting ){
  411.             printf( "The name is missing\n" );
  412.             measured_strings_destroy( & netif->configuration );
  413.             free( netif );
  414.             return EINVAL;
  415.         }
  416.         netif->name = setting->value;
  417.         // add to the netifs map
  418.         index = netifs_add( & net_globals.netifs, netif->id, netif );
  419.         if( index < 0 ){
  420.             measured_strings_destroy( & netif->configuration );
  421.             free( netif );
  422.             return index;
  423.         }
  424.         // add to the netif names map
  425.         if( ERROR_OCCURRED( char_map_add( & net_globals.netif_names, netif->name, 0, index ))
  426.         // start network interfaces and needed modules
  427.         || ERROR_OCCURRED( start_device( netif ))){
  428.             measured_strings_destroy( & netif->configuration );
  429.             netifs_exclude_index( & net_globals.netifs, index );
  430.             return ERROR_CODE;
  431.         }
  432.         // increment modules' usage
  433.         ++ netif->driver->usage;
  434.         if( netif->nil ) ++ netif->nil->usage;
  435.         ++ netif->il->usage;
  436.         printf( "New network interface started:\n\tname\t= %s\n\tid\t= %d\n\tdriver\t= %s\n\tnil\t= %s\n\til\t= %s\n", netif->name, netif->id, netif->driver->name, netif->nil ? netif->nil->name : NULL, netif->il->name );
  437.     }
  438.     return EOK;
  439. }
  440.  
  441. /** @}
  442.  */
  443.