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/*
* Copyright (c) 2009 Lukas Mejdrech
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/** @addtogroup net
* @{
*/
/** @file
* Networking subsystem central module implementation.
*/
#include <async.h>
#include <ctype.h>
#include <ddi.h>
#include <errno.h>
#include <malloc.h>
#include <stdio.h>
#include <string.h>
#include <ipc/ipc.h>
#include <ipc/services.h>
#include "../err.h"
#include "../messages.h"
#include "../modules.h"
#include "../structures/char_map.h"
#include "../structures/generic_char_map.h"
#include "../structures/measured_strings.h"
#include "../structures/module_map.h"
#include "../structures/packet/packet.h"
#include "../il/il_messages.h"
#include "../include/device.h"
#include "../include/netif_interface.h"
#include "../include/nil_interface.h"
#include "../include/net_interface.h"
#include "../include/ip_interface.h"
#include "net.h"
#include "net_messages.h"
/** Networking module name.
*/
#define NAME "Networking"
/** Prints the module name.
* @see NAME
*/
void module_print_name( void );
/** Starts the networking module.
* 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.
* @param[in] client_connection The client connection processing function. The module skeleton propagates its own one.
* @returns EOK on successful module termination.
* @returns Other error codes as defined for the net_initialize() function.
* @returns Other error codes as defined for the REGISTER_ME() macro function.
*/
int module_start( async_client_conn_t client_connection );
//int parse_line( measured_strings_ref configuration, char * line );
/** Reads the networking subsystem global configuration.
* @returns EOK on success.
* @returns Other error codes as defined for the add_configuration() function.
*/
int read_configuration( void );
/** Starts the network interface according to its configuration.
* Registers the network interface with the subsystem modules.
* Starts the needed subsystem modules.
* @param[in] netif The network interface specific data.
* @returns EOK on success.
* @returns EINVAL if there are some settings missing.
* @returns ENOENT if the internet protocol module is not known.
* @returns Other error codes as defined for the netif_probe_req() function.
* @returns Other error codes as defined for the nil_device_req() function.
* @returns Other error codes as defined for the needed internet layer registering function.
*/
int start_device( netif_ref netif );
/** Reads the configuration and starts all network interfaces.
* @returns EOK on success.
* @returns EXDEV if there is no available system-unique device identifier.
* @returns EINVAL if any of the network interface names are not configured.
* @returns ENOMEM if there is not enough memory left.
* @returns Other error codes as defined for the read_configuration() function.
* @returns Other error codes as defined for the read_netif_configuration() function.
* @returns Other error codes as defined for the start_device() function.
*/
int startup( void );
/** Generates new system-unique device identifier.
* @returns The system-unique devic identifier.
*/
device_id_t generate_new_device_id( void );
/** Returns the configured values.
* The network interface configuration is searched first.
* @param[in] netif_conf The network interface configuration setting.
* @param[out] configuration The found configured values.
* @param[in] count The desired settings count.
* @param[out] data The found configuration settings data.
* @returns EOK.
*/
int net_get_conf( measured_strings_ref netif_conf, measured_string_ref configuration, size_t count, char ** data );
/** Initializes the networking module.
* @param[in] client_connection The client connection processing function. The module skeleton propagates its own one.
* @returns EOK on success.
* @returns ENOMEM if there is not enough memory left.
*/
int net_initialize( async_client_conn_t client_connection );
/** Reads the network interface specific configuration.
* @param[in] name The network interface name.
* @param[in,out] netif The network interface structure.
* @returns EOK on success.
* @returns Other error codes as defined for the add_configuration() function.
*/
int read_netif_configuration( char * name, netif_ref netif );
/** Networking module global data.
*/
net_globals_t net_globals;
DEVICE_MAP_IMPLEMENT( netifs, netif_t )
GENERIC_CHAR_MAP_IMPLEMENT( measured_strings, measured_string_t )
void module_print_name( void ){
printf( "%s", NAME );
}
int module_start( async_client_conn_t client_connection ){
ERROR_DECLARE;
ipcarg_t phonehash;
async_set_client_connection( client_connection );
ERROR_PROPAGATE( pm_init());
if( ERROR_OCCURRED( net_initialize( client_connection ))
|| ERROR_OCCURRED( REGISTER_ME( SERVICE_NETWORKING, & phonehash ))){
pm_destroy();
return ERROR_CODE;
}
async_manager();
pm_destroy();
return EOK;
}
int net_initialize( async_client_conn_t client_connection ){
ERROR_DECLARE;
netifs_initialize( & net_globals.netifs );
char_map_initialize( & net_globals.netif_names );
modules_initialize( & net_globals.modules );
measured_strings_initialize( & net_globals.configuration );
// TODO dynamic configuration
ERROR_PROPAGATE( read_configuration());
ERROR_PROPAGATE( add_module( NULL, & net_globals.modules, LO_NAME, LO_FILENAME, SERVICE_LO, 0, connect_to_service ));
ERROR_PROPAGATE( add_module( NULL, & net_globals.modules, DP8390_NAME, DP8390_FILENAME, SERVICE_DP8390, 0, connect_to_service ));
ERROR_PROPAGATE( add_module( NULL, & net_globals.modules, ETHERNET_NAME, ETHERNET_FILENAME, SERVICE_ETHERNET, 0, connect_to_service ));
ERROR_PROPAGATE( add_module( NULL, & net_globals.modules, NILDUMMY_NAME, NILDUMMY_FILENAME, SERVICE_NILDUMMY, 0, connect_to_service ));
// build specific initialization
return net_initialize_build( client_connection );
}
int net_get_device_conf_req( int net_phone, device_id_t device_id, measured_string_ref * configuration, size_t count, char ** data ){
netif_ref netif;
if( !( configuration && ( count > 0 ))) return EINVAL;
netif = netifs_find( & net_globals.netifs, device_id );
if( netif ){
return net_get_conf( & netif->configuration, * configuration, count, data );
}else{
return net_get_conf( NULL, * configuration, count, data );
}
}
int net_get_conf_req( int net_phone, measured_string_ref * configuration, size_t count, char ** data ){
if( !( configuration && ( count > 0 ))) return EINVAL;
return net_get_conf( NULL, * configuration, count, data );
}
int net_get_conf( measured_strings_ref netif_conf, measured_string_ref configuration, size_t count, char ** data ){
measured_string_ref setting;
size_t index;
if( data ) * data = NULL;
for( index = 0; index < count; ++ index ){
setting = measured_strings_find( netif_conf, configuration[ index ].value, 0 );
if( ! setting ){
setting = measured_strings_find( & net_globals.configuration, configuration[ index ].value, 0 );
}
if( setting ){
configuration[ index ].length = setting->length;
configuration[ index ].value = setting->value;
}else{
configuration[ index ].length = 0;
configuration[ index ].value = NULL;
}
}
return EOK;
}
void net_free_settings( measured_string_ref settings, char * data ){
}
int net_connect_module( services_t service ){
return EOK;
}
int net_message( ipc_callid_t callid, ipc_call_t * call, ipc_call_t * answer, int * answer_count ){
ERROR_DECLARE;
measured_string_ref strings;
char * data;
* answer_count = 0;
switch( IPC_GET_METHOD( * call )){
case IPC_M_PHONE_HUNGUP:
return EOK;
case NET_NET_GET_DEVICE_CONF:
ERROR_PROPAGATE( measured_strings_receive( & strings, & data, IPC_GET_COUNT( call )));
net_get_device_conf_req( 0, IPC_GET_DEVICE( call ), & strings, IPC_GET_COUNT( call ), NULL );
// strings should not contain received data anymore
free( data );
ERROR_CODE = measured_strings_reply( strings, IPC_GET_COUNT( call ));
free( strings );
return ERROR_CODE;
case NET_NET_GET_CONF:
ERROR_PROPAGATE( measured_strings_receive( & strings, & data, IPC_GET_COUNT( call )));
net_get_conf_req( 0, & strings, IPC_GET_COUNT( call ), NULL );
// strings should not contain received data anymore
free( data );
ERROR_CODE = measured_strings_reply( strings, IPC_GET_COUNT( call ));
free( strings );
return ERROR_CODE;
case NET_NET_STARTUP:
return startup();
}
return ENOTSUP;
}
/*
int parse_line( measured_strings_ref configuration, char * line ){
ERROR_DECLARE;
measured_string_ref setting;
char * name;
char * value;
// from the beginning
name = line;
// skip spaces
while( isspace( * name )) ++ name;
// remember the name start
value = name;
// skip the name
while( isalnum( * value ) || ( * value == '_' )){
// make uppercase
// * value = toupper( * value );
++ value;
}
if( * value == '=' ){
// terminate the name
* value = '\0';
}else{
// terminate the name
* value = '\0';
// skip until '='
++ value;
while(( * value ) && ( * value != '=' )) ++ value;
// not found?
if( * value != '=' ) return EINVAL;
}
++ value;
// skip spaces
while( isspace( * value )) ++ value;
// create a bulk measured string till the end
setting = measured_string_create_bulk( value, -1 );
if( ! setting ) return ENOMEM;
// add the configuration setting
if( ERROR_OCCURRED( measured_strings_add( configuration, name, 0, setting ))){
free( setting );
return ERROR_CODE;
}
return EOK;
}
*/
int add_configuration( measured_strings_ref configuration, const char * name, const char * value ){
ERROR_DECLARE;
measured_string_ref setting;
setting = measured_string_create_bulk( value, 0 );
if( ! setting ) return ENOMEM;
// add the configuration setting
if( ERROR_OCCURRED( measured_strings_add( configuration, name, 0, setting ))){
free( setting );
return ERROR_CODE;
}
return EOK;
}
device_id_t generate_new_device_id( void ){
return device_assign_devno();
}
int read_configuration( void ){
ERROR_DECLARE;
// read general configuration
ERROR_PROPAGATE( add_configuration( & net_globals.configuration, "IPV", "4" ));
ERROR_PROPAGATE( add_configuration( & net_globals.configuration, "IP_ROUTING", "no" ));
ERROR_PROPAGATE( add_configuration( & net_globals.configuration, "MTU", "1500" ));
ERROR_PROPAGATE( add_configuration( & net_globals.configuration, "ICMP_ERROR_REPORTING", "yes" )); //anything else not starting with 'y'
ERROR_PROPAGATE( add_configuration( & net_globals.configuration, "ICMP_ECHO_REPLYING", "yes" )); //anything else not starting with 'y'
ERROR_PROPAGATE( add_configuration( & net_globals.configuration, "UDP_CHECKSUM_COMPUTING", "yes" )); //anything else not starting with 'y'
ERROR_PROPAGATE( add_configuration( & net_globals.configuration, "UDP_AUTOBINDING", "yes" )); //anything else not starting with 'y'
return EOK;
}
int read_netif_configuration( char * name, netif_ref netif ){
ERROR_DECLARE;
if( str_lcmp( name, "lo", 2 ) == 0 ){
ERROR_PROPAGATE( add_configuration( & netif->configuration, "NAME", LO_NAME ));
ERROR_PROPAGATE( add_configuration( & netif->configuration, "NETIF", LO_NAME ));
ERROR_PROPAGATE( add_configuration( & netif->configuration, "IL", IP_NAME ));
ERROR_PROPAGATE( add_configuration( & netif->configuration, "IP_CONFIG", "static" ));
ERROR_PROPAGATE( add_configuration( & netif->configuration, "IP_ADDR", "127.0.0.1" ));
ERROR_PROPAGATE( add_configuration( & netif->configuration, "IP_NETMASK", "255.0.0.0" ));
ERROR_PROPAGATE( add_configuration( & netif->configuration, "MTU", "15535" ));
}else if( str_lcmp( name, "ne2k", 4 ) == 0 ){
ERROR_PROPAGATE( add_configuration( & netif->configuration, "NAME", "eth0" ));
ERROR_PROPAGATE( add_configuration( & netif->configuration, "NETIF", DP8390_NAME ));
ERROR_PROPAGATE( add_configuration( & netif->configuration, "ETH_MODE", "DIX" )); //8023_2_LSAP( not supported ), 8023_2_SNAP
// ERROR_PROPAGATE( add_configuration( & netif->configuration, "ETH_DUMMY", "yes" )); //anything else not starting with 'y'
ERROR_PROPAGATE( add_configuration( & netif->configuration, "IL", IP_NAME ));
ERROR_PROPAGATE( add_configuration( & netif->configuration, "IRQ", "9" ));
ERROR_PROPAGATE( add_configuration( & netif->configuration, "IO", "300" ));
ERROR_PROPAGATE( add_configuration( & netif->configuration, "MTU", "1492" ));
ERROR_PROPAGATE( add_configuration( & netif->configuration, "IP_CONFIG", "static" ));
ERROR_PROPAGATE( add_configuration( & netif->configuration, "IP_ADDR", "10.0.2.15" ));
ERROR_PROPAGATE( add_configuration( & netif->configuration, "IP_ROUTING", "yes" ));
ERROR_PROPAGATE( add_configuration( & netif->configuration, "IP_NETMASK", "255.255.255.240" ));
ERROR_PROPAGATE( add_configuration( & netif->configuration, "IP_BROADCAST", "10.0.2.255" ));
ERROR_PROPAGATE( add_configuration( & netif->configuration, "IP_GATEWAY", "10.0.2.2" ));
ERROR_PROPAGATE( add_configuration( & netif->configuration, "ARP", "arp" ));
}
return read_netif_configuration_build( name, netif );
}
int start_device( netif_ref netif ){
ERROR_DECLARE;
measured_string_ref setting;
services_t internet_service;
int irq;
int io;
int mtu;
// mandatory netif
setting = measured_strings_find( & netif->configuration, CONF_NETIF, 0 );
netif->driver = get_running_module( & net_globals.modules, setting->value );
if( ! netif->driver ){
printf( "Failed to start the network interface driver %s\n", setting->value );
return EINVAL;
}
// optional network interface layer
setting = measured_strings_find( & netif->configuration, CONF_NIL, 0 );
if( setting ){
netif->nil = get_running_module( & net_globals.modules, setting->value );
if( ! netif->nil ){
printf( "Failed to start the network interface layer %s\n", setting->value );
return EINVAL;
}
}else{
netif->nil = NULL;
}
// mandatory internet layer
setting = measured_strings_find( & netif->configuration, CONF_IL, 0 );
netif->il = get_running_module( & net_globals.modules, setting->value );
if( ! netif->il ){
printf( "Failed to start the internet layer %s\n", setting->value );
return EINVAL;
}
// end of the static loopback initialization
// startup the loopback interface
setting = measured_strings_find( & netif->configuration, CONF_IRQ, 0 );
irq = setting ? strtol( setting->value, NULL, 10 ) : 0;
setting = measured_strings_find( & netif->configuration, CONF_IO, 0 );
io = setting ? strtol( setting->value, NULL, 16 ) : 0;
ERROR_PROPAGATE( netif_probe_req( netif->driver->phone, netif->id, irq, io ));
if( netif->nil ){
setting = measured_strings_find( & netif->configuration, CONF_MTU, 0 );
if( ! setting ){
setting = measured_strings_find( & net_globals.configuration, CONF_MTU, 0 );
}
mtu = setting ? strtol( setting->value, NULL, 10 ) : 0;
ERROR_PROPAGATE( nil_device_req( netif->nil->phone, netif->id, mtu, netif->driver->service ));
internet_service = netif->nil->service;
}else{
internet_service = netif->driver->service;
}
switch( netif->il->service ){
case SERVICE_IP:
ERROR_PROPAGATE( ip_device_req( netif->il->phone, netif->id, internet_service ));
break;
default:
return ENOENT;
}
ERROR_PROPAGATE( netif_start_req( netif->driver->phone, netif->id ));
return EOK;
}
int startup( void ){
ERROR_DECLARE;
char * conf_files[] = { "lo", "ne2k" };
int count = sizeof( conf_files ) / sizeof( char * );
int index;
netif_ref netif;
int i;
measured_string_ref setting;
for( i = 0; i < count; ++ i ){
netif = ( netif_ref ) malloc( sizeof( netif_t ));
if( ! netif ) return ENOMEM;
netif->id = generate_new_device_id();
if( ! netif->id ) return EXDEV;
ERROR_PROPAGATE( measured_strings_initialize( & netif->configuration ));
// read configuration files
if( ERROR_OCCURRED( read_netif_configuration( conf_files[ i ], netif ))){
measured_strings_destroy( & netif->configuration );
free( netif );
return ERROR_CODE;
}
// mandatory name
setting = measured_strings_find( & netif->configuration, CONF_NAME, 0 );
if( ! setting ){
printf( "The name is missing\n" );
measured_strings_destroy( & netif->configuration );
free( netif );
return EINVAL;
}
netif->name = setting->value;
// add to the netifs map
index = netifs_add( & net_globals.netifs, netif->id, netif );
if( index < 0 ){
measured_strings_destroy( & netif->configuration );
free( netif );
return index;
}
// add to the netif names map
if( ERROR_OCCURRED( char_map_add( & net_globals.netif_names, netif->name, 0, index ))
// start network interfaces and needed modules
|| ERROR_OCCURRED( start_device( netif ))){
measured_strings_destroy( & netif->configuration );
netifs_exclude_index( & net_globals.netifs, index );
return ERROR_CODE;
}
// increment modules' usage
++ netif->driver->usage;
if( netif->nil ) ++ netif->nil->usage;
++ netif->il->usage;
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 );
}
return EOK;
}
/** @}
*/