WebSVN – HelenOS – Diff – /branches/network/uspace/srv/net/il/arp/arp.c


/*
 * 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 arp
 *  @{
 */
 
/** @file
 *  ARP module implementation.
 *  @see arp.h
 */
 
#include <async.h>
#include <malloc.h>
#include <mem.h>
#include <rwlock.h>
#include <stdio.h>
#include <string.h>
#include <task.h>
 
#include <ipc/ipc.h>
#include <ipc/services.h>
 
#include "../../err.h"
#include "../../messages.h"
#include "../../modules.h"
 
#include "../../include/byteorder.h"
#include "../../include/device.h"
#include "../../include/arp_interface.h"
#include "../../include/nil_interface.h"
#include "../../include/protocol_map.h"
 
#include "../../structures/measured_strings.h"
#include "../../structures/packet/packet.h"
#include "../../structures/packet/packet_client.h"
 
#include "../il_messages.h"
 
#include "arp.h"
#include "arp_header.h"
#include "arp_oc.h"
#include "arp_module.h"
#include "arp_messages.h"
 
/** ARP global data.
 */
arp_globals_t   arp_globals;
 
int arp_device_req( int arp_phone, device_id_t device_id, services_t protocol, services_t netif, measured_string_ref address );
int arp_translate_req( int arp_phone, device_id_t device_id, services_t protocol, measured_string_ref address, measured_string_ref * translation, char ** data );
 
/** Clears the whole cache.
 *  @returns EOK on success.
 */
int arp_clean_cache_req( int arp_phone );
 
/** Clears the device specific data from the cache.
 *  @param device_id The device identifier. Input parameter.
 *  @returns EOK on success.
 *  @returns ENOENT  if the device is not found in the cache.
 */
int arp_clear_device_req( int arp_phone, device_id_t device_id );
 
/** Creates new protocol specific data.
 *  @param proto Protocol specific data. Output parameter.
 *  @param service Protocol module service. Input parameter.
 *  @param address Actual protocol device address. Input parameter.
 *  @returns EOK on success.
 *  @returns ENOMEM if there is not enough memory left.
 */
int arp_proto_create( arp_proto_ref * proto, services_t service, measured_string_ref address );
 
/** Registers the device.
 *  Creates new device entry in the cache or updates the protocol address if the device with the device identifier and the driver service exists.
 *  @param device_id The device identifier. Input parameter.
 *  @param service The device driver service. Input parameter.
 *  @param protocol The protocol service. Input parameter.
 *  @param address The actual device protocol address.
 *  @returns EOK on success.
 *  @returns EEXIST if another device with the same device identifier and different driver service exists.
 *  @returns ENOMEM if there is not enough memory left.
 *  @returns Other error codes as defined for the measured_strings_return() function.
 */
int arp_device_message( device_id_t device_id, services_t service, services_t protocol, measured_string_ref address );
 
/** Returns the hardware address for the given protocol address.
 *  Sends the ARP request packet if the hardware address is not found in the cache.
 *  @param device_id The device identifier. Input parameter.
 *  @param protocol The protocol service. Input parameter.
 *  @param target The target protocol address. Input parameter.
 *  @returns The hardware address of the target.
 *  @returns NULL if the target parameter is NULL.
 *  @returns NULL if the device is not found.
 *  @returns NULL if the device packet is too small to send a&nbsp;request.
 *  @returns NULL if the hardware address is not found in the cache.
 */
measured_string_ref arp_translate_message( device_id_t device_id, services_t protocol, measured_string_ref target );
 
/** Processes the received ARP packet.
 *  Updates the source hardware address if the source entry exists or the packet is targeted to my protocol address.
 *  Responses to the ARP request if the packet is the ARP request and is targeted to my address.
 *  @param device_id The source device identifier. Input parameter.
 *  @param packet The received packet. Input/output parameter.
 *  @returns EOK on success.
 *  @returns EINVAL if the packet is too small to carry the ARP packet.
 *  @returns EINVAL if the received address lengths differs from the registered values.
 *  @returns ENOENT if the device is not found in the cache.
 *  @returns ENOENT if the protocol for the device is not found in the cache.
 *  @returns ENOMEM if there is not enough memory left.
 */
int arp_receive_message( device_id_t device_id, packet_t packet );
 
/** Clears the device specific data.
 *  @param device The device specific data.
 */
void    clear_device( arp_device_ref device );
 
/** Processes IPC messages from the registered device driver modules in an infinite loop.
 *  @param iid The message identifier. Input parameter.
 *  @param icall The message parameters. Input/output parameter.
 */
void    arp_receiver( ipc_callid_t iid, ipc_call_t * icall );
 
DEVICE_MAP_IMPLEMENT( arp_cache, arp_device_t )
 
INT_MAP_IMPLEMENT( arp_protos, arp_proto_t )
 
GENERIC_CHAR_MAP_IMPLEMENT( arp_addr, measured_string_t )
 
int arp_task_get_id( void ){
    return task_get_id();
}
 
int arp_clear_device_req( int arp_phone, device_id_t device_id ){
    arp_device_ref  device;
 
    rwlock_write_lock( & arp_globals.lock );
    device = arp_cache_find( & arp_globals.cache, device_id );
    if( ! device ){
        rwlock_write_unlock( & arp_globals.lock );
        return ENOENT;
    }
    clear_device( device );
    printf( "Device %d cleared\n", device_id );
    rwlock_write_unlock( & arp_globals.lock );
    return EOK;
}
 
int arp_clean_cache_req( int arp_phone ){
    int             count;
    arp_device_ref  device;
 
    rwlock_write_lock( & arp_globals.lock );
    for( count = arp_cache_count( & arp_globals.cache ) - 1; count >= 0; -- count ){
        device = arp_cache_get_index( & arp_globals.cache, count );
        if( device ){
            clear_device( device );
            if( device->addr_data ) free( device->addr_data );
            if( device->broadcast_data ) free( device->broadcast_data );
        }
    }
    arp_cache_clear( & arp_globals.cache );
    rwlock_write_unlock( & arp_globals.lock );
    printf( "Cache cleaned\n" );
    return EOK;
}
 
int arp_device_req( int arp_phone, device_id_t device_id, services_t protocol, services_t netif, measured_string_ref address ){
    ERROR_DECLARE;
 
    measured_string_ref tmp;
 
    tmp = measured_string_copy( address );
    if( ERROR_OCCURRED( arp_device_message( device_id, netif, protocol, tmp ))){
        free( tmp->value );
        free( tmp );
    }
    return ERROR_CODE;
}
 
int arp_translate_req( int arp_phone, device_id_t device_id, services_t protocol, measured_string_ref address, measured_string_ref * translation, char ** data ){
    measured_string_ref tmp;
 
    rwlock_read_lock( & arp_globals.lock );
    tmp = arp_translate_message( device_id, protocol, address );
    if( tmp ){
        * translation = measured_string_copy( tmp );
        rwlock_read_unlock( & arp_globals.lock );
        if( * translation ){
            * data = ( ** translation ).value;
            return EOK;
        }else{
            return ENOMEM;
        }
    }else{
        rwlock_read_unlock( & arp_globals.lock );
        return ENOENT;
    }
}
 
int arp_initialize( void ){
    ERROR_DECLARE;
 
    rwlock_initialize( & arp_globals.lock );
    rwlock_write_lock( & arp_globals.lock );
    ERROR_PROPAGATE( arp_cache_initialize( & arp_globals.cache ));
    rwlock_write_unlock( & arp_globals.lock );
    return EOK;
}
 
int arp_proto_create( arp_proto_ref * proto, services_t service, measured_string_ref address ){
    ERROR_DECLARE;
 
    * proto = ( arp_proto_ref ) malloc( sizeof( arp_proto_t ));
    if( !( * proto )) return ENOMEM;
    ( ** proto ).service = service;
    ( ** proto ).addr = address;
    ( ** proto ).addr_data = address->value;
    if( ERROR_OCCURRED( arp_addr_initialize( &( ** proto).addresses ))){
        free( * proto );
        return ERROR_CODE;
    }
    return EOK;
}
 
int arp_device_message( device_id_t device_id, services_t service, services_t protocol, measured_string_ref address ){
    ERROR_DECLARE;
 
    arp_device_ref  device;
    arp_proto_ref   proto;
    int             index;
 
    rwlock_write_lock( & arp_globals.lock );
    // an existing device?
    device = arp_cache_find( & arp_globals.cache, device_id );
    if( device ){
        if( device->service != service ){
            printf( "Device %d already exists\n", device->device_id );
            rwlock_write_unlock( & arp_globals.lock );
            return EEXIST;
        }
        proto = arp_protos_find( & device->protos, protocol );
        if( proto ){
            free( proto->addr );
            free( proto->addr_data );
            proto->addr = address;
            proto->addr_data = address->value;
        }else{
            if( ERROR_OCCURRED( arp_proto_create( & proto, protocol, address ))){
                rwlock_write_unlock( & arp_globals.lock );
                return ERROR_CODE;
            }
            index = arp_protos_add( & device->protos, proto->service, proto );
            if( index < 0 ){
                rwlock_write_unlock( & arp_globals.lock );
                free( proto );
                return index;
            }
            printf( "New protocol added:\n\tdevice id\t= %d\n\tproto\t= %d", device_id, protocol );
        }
 
    }else{
        index = hardware_map( service );
        if( ! index ) return ENOENT;
        // create a new device
        device = ( arp_device_ref ) malloc( sizeof( arp_device_t ));
        if( ! device ){
            rwlock_write_unlock( & arp_globals.lock );
            return ENOMEM;
        }
        device->hardware = index;
        device->device_id = device_id;
        if( ERROR_OCCURRED( arp_protos_initialize( & device->protos ))
        || ERROR_OCCURRED( arp_proto_create( & proto, protocol, address ))){
            rwlock_write_unlock( & arp_globals.lock );
            free( device );
            return ERROR_CODE;
        }
        index = arp_protos_add( & device->protos, proto->service, proto );
        if( index < 0 ){
            rwlock_write_unlock( & arp_globals.lock );
            arp_protos_destroy( & device->protos );
            free( device );
            return index;
        }
        device->service = service;
        // bind the new one
        device->phone = bind_service( device->service, device->device_id, SERVICE_ARP, 0, arp_receiver );
        if( device->phone < 0 ){
            rwlock_write_unlock( & arp_globals.lock );
            arp_protos_destroy( & device->protos );
            free( device );
            return EREFUSED;
        }
        // get packet dimensions
        if( ERROR_OCCURRED( nil_packet_size_req( device->phone, device_id, & device->addr_len, & device->prefix, & device->content, & device->suffix ))){
            rwlock_write_unlock( & arp_globals.lock );
            arp_protos_destroy( & device->protos );
            free( device );
            return ERROR_CODE;
        }
        // get hardware address
        if( ERROR_OCCURRED( nil_get_addr( device->phone, device_id, & device->addr, & device->addr_data ))){
            rwlock_write_unlock( & arp_globals.lock );
            arp_protos_destroy( & device->protos );
            free( device );
            return ERROR_CODE;
        }
        // get broadcast address
        if( ERROR_OCCURRED( nil_get_broadcast_addr( device->phone, device_id, & device->broadcast_addr, & device->broadcast_data ))){
            rwlock_write_unlock( & arp_globals.lock );
            free( device->addr );
            free( device->addr_data );
            arp_protos_destroy( & device->protos );
            free( device );
            return ERROR_CODE;
        }
        if( ERROR_OCCURRED( arp_cache_add( & arp_globals.cache, device->device_id, device ))){
            rwlock_write_unlock( & arp_globals.lock );
            free( device->addr );
            free( device->addr_data );
            free( device->broadcast_addr );
            free( device->broadcast_data );
            arp_protos_destroy( & device->protos );
            free( device );
            return ERROR_CODE;
        }
        printf( "New device registered:\n\tid\t= %d\n\ttype\t= 0x%x\n\tservice\t= %d\n\tproto\t= %d\n", device->device_id, device->hardware, device->service, protocol );
    }
    rwlock_write_unlock( & arp_globals.lock );
    return EOK;
}
 
measured_string_ref arp_translate_message( device_id_t device_id, services_t protocol, measured_string_ref target ){
    arp_device_ref      device;
    arp_proto_ref       proto;
    measured_string_ref addr;
    size_t              length;
    packet_t            packet;
    arp_header_ref      header;
 
    if( ! target ) return NULL;
    device = arp_cache_find( & arp_globals.cache, device_id );
    if( ! device ) return NULL;
    proto = arp_protos_find( & device->protos, protocol );
    if(( ! proto ) || ( proto->addr->length != target->length )) return NULL;
    addr = arp_addr_find( & proto->addresses, target->value, target->length );
    if( addr ) return addr;
    // ARP packet content size = header + ( address + translation ) * 2
    length = 8 + ( CONVERT_SIZE( char, uint8_t, proto->addr->length ) + CONVERT_SIZE( char, uint8_t, device->addr->length )) * 2;
    if( length > device->content ) return NULL;
    packet = packet_get_4( arp_globals.net_phone, device->addr_len, device->prefix, length, device->suffix );
    if( ! packet ) return NULL;
    header = ( arp_header_ref ) packet_suffix( packet, length );
    header->hardware = htons( device->hardware );
    header->hardware_length = device->addr->length;
    header->protocol = htons( protocol_map( device->service, protocol ));
    header->protocol_length = proto->addr->length;
    header->operation = htons( ARPOP_REQUEST );
    length = sizeof( arp_header_t );
    memcpy((( uint8_t * ) header ) + length, device->addr->value, device->addr->length );
    length += device->addr->length;
    memcpy((( uint8_t * ) header ) + length, proto->addr->value, proto->addr->length );
    length += proto->addr->length;
    bzero((( uint8_t * ) header ) + length, device->addr->length );
    length += device->addr->length;
    memcpy((( uint8_t * ) header ) + length, target->value, target->length );
    packet_set_addr( packet, ( uint8_t * ) device->addr->value, ( uint8_t * ) device->broadcast_addr->value, CONVERT_SIZE( char, uint8_t, device->addr->length ));
    nil_send_msg( device->phone, device_id, packet, SERVICE_ARP );
    return NULL;
}
 
int arp_receive_message( device_id_t device_id, packet_t packet ){
    ERROR_DECLARE;
 
    size_t              length;
    arp_header_ref      header;
    arp_device_ref      device;
    arp_proto_ref       proto;
    measured_string_ref hw_source;
    uint8_t *           src_hw;
    uint8_t *           src_proto;
    uint8_t *           des_hw;
    uint8_t *           des_proto;
 
    length = packet_get_data_length( packet );
    if( length <= sizeof( arp_header_t )) return EINVAL;
    device = arp_cache_find( & arp_globals.cache, device_id );
    if( ! device ) return ENOENT;
    header = ( arp_header_ref ) packet_get_data( packet );
    if(( ntohs( header->hardware ) != device->hardware )
    || ( length < sizeof( arp_header_t ) + ( header->hardware_length + header->protocol_length ) * 2 )){
        return EINVAL;
    }
    proto = arp_protos_find( & device->protos, protocol_unmap( device->service, ntohs( header->protocol )));
    if( ! proto ) return ENOENT;
    src_hw = (( uint8_t * ) header ) + sizeof( arp_header_t );
    src_proto = src_hw + header->hardware_length;
    des_hw = src_proto + header->protocol_length;
    des_proto = des_hw + header->hardware_length;
    hw_source = arp_addr_find( & proto->addresses, ( char * ) src_proto, CONVERT_SIZE( uint8_t, char, header->protocol_length ));
    // exists?
    if( hw_source ){
        if( hw_source->length != CONVERT_SIZE( uint8_t, char, header->hardware_length )){
            return EINVAL;
        }
        memcpy( hw_source->value, src_hw, hw_source->length );
    }
    // is my protocol address?
    if( proto->addr->length != CONVERT_SIZE( uint8_t, char, header->protocol_length )){
        return EINVAL;
    }
    if( ! str_lcmp( proto->addr->value, ( char * ) des_proto, proto->addr->length )){
        // not already upadted?
        if( ! hw_source ){
            hw_source = measured_string_create_bulk(( char * ) src_hw, CONVERT_SIZE( uint8_t, char, header->hardware_length ));
            if( ! hw_source ) return ENOMEM;
            ERROR_PROPAGATE( arp_addr_add( & proto->addresses, ( char * ) src_proto, CONVERT_SIZE( uint8_t, char, header->protocol_length ), hw_source ));
        }
        if( ntohs( header->operation ) == ARPOP_REQUEST ){
            header->operation = htons( ARPOP_REPLY );
            memcpy( des_proto, src_proto, header->protocol_length );
            memcpy( src_proto, proto->addr->value, header->protocol_length );
            memcpy( src_hw, device->addr->value, device->addr_len );
            memcpy( des_hw, hw_source->value, header->hardware_length );
            packet_set_addr( packet, src_hw, des_hw, header->hardware_length );
            nil_send_msg( device->phone, device_id, packet, SERVICE_ARP );
        }else{
            pq_release( arp_globals.net_phone, packet_get_id( packet ));
        }
    }
    return EOK;
}
 
void clear_device( arp_device_ref device ){
    int             count;
    arp_proto_ref   proto;
 
    for( count = arp_protos_count( & device->protos ) - 1; count >= 0; -- count ){
        proto = arp_protos_get_index( & device->protos, count );
        if( proto ){
            if( proto->addr ) free( proto->addr );
            if( proto->addr_data ) free( proto->addr_data );
            arp_addr_destroy( & proto->addresses );
        }
    }
    arp_protos_clear( & device->protos );
}
 
int arp_connect_module( services_t service ){
    return EOK;
}
 
int arp_message( ipc_callid_t callid, ipc_call_t * call, ipc_call_t * answer, int * answer_count ){
    ERROR_DECLARE;
 
    measured_string_ref address;
    measured_string_ref translation;
    char *              data;
 
//  printf( "message %d - %d\n", IPC_GET_METHOD( * call ), NET_ARP_FIRST );
    * answer_count = 0;
    switch( IPC_GET_METHOD( * call )){
        case IPC_M_PHONE_HUNGUP:
            return EOK;
        case NET_ARP_DEVICE:
            ERROR_PROPAGATE( measured_strings_receive( & address, & data, 1 ));
            if( ERROR_OCCURRED( arp_device_message( IPC_GET_DEVICE( call ), IPC_GET_SERVICE( call ), ARP_GET_NETIF( call ), address ))){
                free( address );
                free( data );
            }
            return ERROR_CODE;
        case NET_ARP_TRANSLATE:
            ERROR_PROPAGATE( measured_strings_receive( & address, & data, 1 ));
            rwlock_read_lock( & arp_globals.lock );
            translation = arp_translate_message( IPC_GET_DEVICE( call ), IPC_GET_SERVICE( call ), address );
            free( address );
            free( data );
            if( ! translation ){
                rwlock_read_unlock( & arp_globals.lock );
                return ENOENT;
            }
            ERROR_CODE = measured_strings_reply( translation, 1 );
            rwlock_read_unlock( & arp_globals.lock );
            return ERROR_CODE;
        case NET_ARP_CLEAR_DEVICE:
            return arp_clear_device_req( 0, IPC_GET_DEVICE( call ));
        case NET_ARP_CLEAN_CACHE:
            return arp_clean_cache_req( 0 );
    }
    return ENOTSUP;
}
 
void arp_receiver( ipc_callid_t iid, ipc_call_t * icall ){
    ERROR_DECLARE;
 
    packet_t        packet;
 
    while( true ){
        switch( IPC_GET_METHOD( * icall )){
            case NET_IL_DEVICE_STATE:
                // do nothing - keep the cache
                ipc_answer_0( iid, EOK );
                break;
            case NET_IL_RECEIVED:
                if( ! ERROR_OCCURRED( packet_translate( arp_globals.net_phone, & packet, IPC_GET_PACKET( icall )))){
                    rwlock_read_lock( & arp_globals.lock );
                    ERROR_CODE = arp_receive_message( IPC_GET_DEVICE( icall ), packet );
                    rwlock_read_unlock( & arp_globals.lock );
                }
                ipc_answer_0( iid, ERROR_CODE );
                break;
            default:
                ipc_answer_0( iid, ENOTSUP );
        }
        iid = async_get_call( icall );
    }
}
 
/** @}
 */
 

Rev 4327	Rev 4332
1	/*	1	/*
2	* Copyright (c) 2009 Lukas Mejdrech	2	* Copyright (c) 2009 Lukas Mejdrech
3	* All rights reserved.	3	* All rights reserved.
4	*	4	*
5	* Redistribution and use in source and binary forms, with or without	5	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions	6	* modification, are permitted provided that the following conditions
7	* are met:	7	* are met:
8	*	8	*
9	* - Redistributions of source code must retain the above copyright	9	* - Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.	10	* notice, this list of conditions and the following disclaimer.
11	* - Redistributions in binary form must reproduce the above copyright	11	* - Redistributions in binary form must reproduce the above copyright
12	* notice, this list of conditions and the following disclaimer in the	12	* notice, this list of conditions and the following disclaimer in the
13	* documentation and/or other materials provided with the distribution.	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	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.	15	* derived from this software without specific prior written permission.
16	*	16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	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	18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	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	23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	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	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.	26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27	*/	27	*/
28		28
29	/** @addtogroup arp	29	/** @addtogroup arp
30	* @{	30	* @{
31	*/	31	*/
32		32
33	/** @file	33	/** @file
34	* ARP module implementation.	34	* ARP module implementation.
35	* @see arp.h	35	* @see arp.h
36	*/	36	*/
37		37
38	#include <async.h>	38	#include <async.h>
39	#include <malloc.h>	39	#include <malloc.h>
40	#include <mem.h>	40	#include <mem.h>
41	#include <rwlock.h>	41	#include <rwlock.h>
42	#include <stdio.h>	42	#include <stdio.h>
43	#include <string.h>	43	#include <string.h>
44	#include <task.h>	44	#include <task.h>
45		45
46	#include <ipc/ipc.h>	46	#include <ipc/ipc.h>
47	#include <ipc/services.h>	47	#include <ipc/services.h>
48		48
49	#include "../../err.h"	49	#include "../../err.h"
50	#include "../../messages.h"	50	#include "../../messages.h"
51	#include "../../modules.h"	51	#include "../../modules.h"
52		52
53	#include "../../include/byteorder.h"	53	#include "../../include/byteorder.h"
54	#include "../../include/device.h"	54	#include "../../include/device.h"
55	#include "../../include/arp_interface.h"	55	#include "../../include/arp_interface.h"
56	#include "../../include/nil_interface.h"	56	#include "../../include/nil_interface.h"
57	#include "../../include/protocol_map.h"	57	#include "../../include/protocol_map.h"
58		58
59	#include "../../structures/measured_strings.h"	59	#include "../../structures/measured_strings.h"
60	#include "../../structures/packet/packet.h"	60	#include "../../structures/packet/packet.h"
61	#include "../../structures/packet/packet_client.h"	61	#include "../../structures/packet/packet_client.h"
62		62
63	#include "../il_messages.h"	63	#include "../il_messages.h"
64		64
65	#include "arp.h"	65	#include "arp.h"
66	#include "arp_header.h"	66	#include "arp_header.h"
67	#include "arp_oc.h"	67	#include "arp_oc.h"
68	#include "arp_module.h"	68	#include "arp_module.h"
69	#include "arp_messages.h"	69	#include "arp_messages.h"
70		70
71	/** ARP global data.	71	/** ARP global data.
72	*/	72	*/
73	arp_globals_t arp_globals;	73	arp_globals_t arp_globals;
74		74
75	int arp_device_req( int arp_phone, device_id_t device_id, services_t protocol, services_t netif, measured_string_ref address );	75	int arp_device_req( int arp_phone, device_id_t device_id, services_t protocol, services_t netif, measured_string_ref address );
76	int arp_translate_req( int arp_phone, device_id_t device_id, services_t protocol, measured_string_ref address, measured_string_ref * translation, char ** data );	76	int arp_translate_req( int arp_phone, device_id_t device_id, services_t protocol, measured_string_ref address, measured_string_ref * translation, char ** data );
77		77
78	/** Clears the whole cache.	78	/** Clears the whole cache.
79	* @returns EOK on success.	79	* @returns EOK on success.
80	*/	80	*/
81	int arp_clean_cache_req( int arp_phone );	81	int arp_clean_cache_req( int arp_phone );
82		82
83	/** Clears the device specific data from the cache.	83	/** Clears the device specific data from the cache.
84	* @param device_id The device identifier. Input parameter.	84	* @param device_id The device identifier. Input parameter.
85	* @returns EOK on success.	85	* @returns EOK on success.
86	* @returns ENOENT if the device is not found in the cache.	86	* @returns ENOENT if the device is not found in the cache.
87	*/	87	*/
88	int arp_clear_device_req( int arp_phone, device_id_t device_id );	88	int arp_clear_device_req( int arp_phone, device_id_t device_id );
89		89
90	/** Creates new protocol specific data.	90	/** Creates new protocol specific data.
91	* @param proto Protocol specific data. Output parameter.	91	* @param proto Protocol specific data. Output parameter.
92	* @param service Protocol module service. Input parameter.	92	* @param service Protocol module service. Input parameter.
93	* @param address Actual protocol device address. Input parameter.	93	* @param address Actual protocol device address. Input parameter.
94	* @returns EOK on success.	94	* @returns EOK on success.
95	* @returns ENOMEM if there is not enough memory left.	95	* @returns ENOMEM if there is not enough memory left.
96	*/	96	*/
97	int arp_proto_create( arp_proto_ref * proto, services_t service, measured_string_ref address );	97	int arp_proto_create( arp_proto_ref * proto, services_t service, measured_string_ref address );
98		98
99	/** Registers the device.	99	/** Registers the device.
100	* Creates new device entry in the cache or updates the protocol address if the device with the device identifier and the driver service exists.	100	* Creates new device entry in the cache or updates the protocol address if the device with the device identifier and the driver service exists.
101	* @param device_id The device identifier. Input parameter.	101	* @param device_id The device identifier. Input parameter.
102	* @param service The device driver service. Input parameter.	102	* @param service The device driver service. Input parameter.
103	* @param protocol The protocol service. Input parameter.	103	* @param protocol The protocol service. Input parameter.
104	* @param address The actual device protocol address.	104	* @param address The actual device protocol address.
105	* @returns EOK on success.	105	* @returns EOK on success.
106	* @returns EEXIST if another device with the same device identifier and different driver service exists.	106	* @returns EEXIST if another device with the same device identifier and different driver service exists.
107	* @returns ENOMEM if there is not enough memory left.	107	* @returns ENOMEM if there is not enough memory left.
108	* @returns Other error codes as defined for the measured_strings_return() function.	108	* @returns Other error codes as defined for the measured_strings_return() function.
109	*/	109	*/
110	int arp_device_message( device_id_t device_id, services_t service, services_t protocol, measured_string_ref address );	110	int arp_device_message( device_id_t device_id, services_t service, services_t protocol, measured_string_ref address );
111		111
112	/** Returns the hardware address for the given protocol address.	112	/** Returns the hardware address for the given protocol address.
113	* Sends the ARP request packet if the hardware address is not found in the cache.	113	* Sends the ARP request packet if the hardware address is not found in the cache.
114	* @param device_id The device identifier. Input parameter.	114	* @param device_id The device identifier. Input parameter.
115	* @param protocol The protocol service. Input parameter.	115	* @param protocol The protocol service. Input parameter.
116	* @param target The target protocol address. Input parameter.	116	* @param target The target protocol address. Input parameter.
117	* @returns The hardware address of the target.	117	* @returns The hardware address of the target.
118	* @returns NULL if the target parameter is NULL.	118	* @returns NULL if the target parameter is NULL.
119	* @returns NULL if the device is not found.	119	* @returns NULL if the device is not found.
120	* @returns NULL if the device packet is too small to send a request.	120	* @returns NULL if the device packet is too small to send a request.
121	* @returns NULL if the hardware address is not found in the cache.	121	* @returns NULL if the hardware address is not found in the cache.
122	*/	122	*/
123	measured_string_ref arp_translate_message( device_id_t device_id, services_t protocol, measured_string_ref target );	123	measured_string_ref arp_translate_message( device_id_t device_id, services_t protocol, measured_string_ref target );
124		124
125	/** Processes the received ARP packet.	125	/** Processes the received ARP packet.
126	* Updates the source hardware address if the source entry exists or the packet is targeted to my protocol address.	126	* Updates the source hardware address if the source entry exists or the packet is targeted to my protocol address.
127	* Responses to the ARP request if the packet is the ARP request and is targeted to my address.	127	* Responses to the ARP request if the packet is the ARP request and is targeted to my address.
128	* @param device_id The source device identifier. Input parameter.	128	* @param device_id The source device identifier. Input parameter.
129	* @param packet The received packet. Input/output parameter.	129	* @param packet The received packet. Input/output parameter.
130	* @returns EOK on success.	130	* @returns EOK on success.
131	* @returns EINVAL if the packet is too small to carry the ARP packet.	131	* @returns EINVAL if the packet is too small to carry the ARP packet.
132	* @returns EINVAL if the received address lengths differs from the registered values.	132	* @returns EINVAL if the received address lengths differs from the registered values.
133	* @returns ENOENT if the device is not found in the cache.	133	* @returns ENOENT if the device is not found in the cache.
134	* @returns ENOENT if the protocol for the device is not found in the cache.	134	* @returns ENOENT if the protocol for the device is not found in the cache.
135	* @returns ENOMEM if there is not enough memory left.	135	* @returns ENOMEM if there is not enough memory left.
136	*/	136	*/
137	int arp_receive_message( device_id_t device_id, packet_t packet );	137	int arp_receive_message( device_id_t device_id, packet_t packet );
138		138
139	/** Clears the device specific data.	139	/** Clears the device specific data.
140	* @param device The device specific data.	140	* @param device The device specific data.
141	*/	141	*/
142	void clear_device( arp_device_ref device );	142	void clear_device( arp_device_ref device );
143		143
144	/** Processes IPC messages from the registered device driver modules in an infinite loop.	144	/** Processes IPC messages from the registered device driver modules in an infinite loop.
145	* @param iid The message identifier. Input parameter.	145	* @param iid The message identifier. Input parameter.
146	* @param icall The message parameters. Input/output parameter.	146	* @param icall The message parameters. Input/output parameter.
147	*/	147	*/
148	void arp_receiver( ipc_callid_t iid, ipc_call_t * icall );	148	void arp_receiver( ipc_callid_t iid, ipc_call_t * icall );
149		149
150	DEVICE_MAP_IMPLEMENT( arp_cache, arp_device_t )	150	DEVICE_MAP_IMPLEMENT( arp_cache, arp_device_t )
151		151
152	INT_MAP_IMPLEMENT( arp_protos, arp_proto_t )	152	INT_MAP_IMPLEMENT( arp_protos, arp_proto_t )
153		153
154	GENERIC_CHAR_MAP_IMPLEMENT( arp_addr, measured_string_t )	154	GENERIC_CHAR_MAP_IMPLEMENT( arp_addr, measured_string_t )
155		155
156	int arp_task_get_id( void ){	156	int arp_task_get_id( void ){
157	return task_get_id();	157	return task_get_id();
158	}	158	}
159		159
160	int arp_clear_device_req( int arp_phone, device_id_t device_id ){	160	int arp_clear_device_req( int arp_phone, device_id_t device_id ){
161	arp_device_ref device;	161	arp_device_ref device;
162		162
163	rwlock_write_lock( & arp_globals.lock );	163	rwlock_write_lock( & arp_globals.lock );
164	device = arp_cache_find( & arp_globals.cache, device_id );	164	device = arp_cache_find( & arp_globals.cache, device_id );
165	if( ! device ){	165	if( ! device ){
166	rwlock_write_unlock( & arp_globals.lock );	166	rwlock_write_unlock( & arp_globals.lock );
167	return ENOENT;	167	return ENOENT;
168	}	168	}
169	clear_device( device );	169	clear_device( device );
170	printf( "Device %d cleared\n", device_id );	170	printf( "Device %d cleared\n", device_id );
171	rwlock_write_unlock( & arp_globals.lock );	171	rwlock_write_unlock( & arp_globals.lock );
172	return EOK;	172	return EOK;
173	}	173	}
174		174
175	int arp_clean_cache_req( int arp_phone ){	175	int arp_clean_cache_req( int arp_phone ){
176	int count;	176	int count;
177	arp_device_ref device;	177	arp_device_ref device;
178		178
179	rwlock_write_lock( & arp_globals.lock );	179	rwlock_write_lock( & arp_globals.lock );
180	for( count = arp_cache_count( & arp_globals.cache ) - 1; count >= 0; -- count ){	180	for( count = arp_cache_count( & arp_globals.cache ) - 1; count >= 0; -- count ){
181	device = arp_cache_get_index( & arp_globals.cache, count );	181	device = arp_cache_get_index( & arp_globals.cache, count );
182	if( device ){	182	if( device ){
183	clear_device( device );	183	clear_device( device );
184	if( device->addr_data ) free( device->addr_data );	184	if( device->addr_data ) free( device->addr_data );
185	if( device->broadcast_data ) free( device->broadcast_data );	185	if( device->broadcast_data ) free( device->broadcast_data );
186	}	186	}
187	}	187	}
188	arp_cache_clear( & arp_globals.cache );	188	arp_cache_clear( & arp_globals.cache );
189	rwlock_write_unlock( & arp_globals.lock );	189	rwlock_write_unlock( & arp_globals.lock );
190	printf( "Cache cleaned\n" );	190	printf( "Cache cleaned\n" );
191	return EOK;	191	return EOK;
192	}	192	}
193		193
194	int arp_device_req( int arp_phone, device_id_t device_id, services_t protocol, services_t netif, measured_string_ref address ){	194	int arp_device_req( int arp_phone, device_id_t device_id, services_t protocol, services_t netif, measured_string_ref address ){
195	ERROR_DECLARE;	195	ERROR_DECLARE;
196		196
197	measured_string_ref tmp;	197	measured_string_ref tmp;
198		198
199	tmp = measured_string_copy( address );	199	tmp = measured_string_copy( address );
200	if( ERROR_OCCURRED( arp_device_message( device_id, netif, protocol, tmp ))){	200	if( ERROR_OCCURRED( arp_device_message( device_id, netif, protocol, tmp ))){
201	free( tmp->value );	201	free( tmp->value );
202	free( tmp );	202	free( tmp );
203	}	203	}
204	return ERROR_CODE;	204	return ERROR_CODE;
205	}	205	}
206		206
207	int arp_translate_req( int arp_phone, device_id_t device_id, services_t protocol, measured_string_ref address, measured_string_ref * translation, char ** data ){	207	int arp_translate_req( int arp_phone, device_id_t device_id, services_t protocol, measured_string_ref address, measured_string_ref * translation, char ** data ){
208	measured_string_ref tmp;	208	measured_string_ref tmp;
209		209
210	rwlock_read_lock( & arp_globals.lock );	210	rwlock_read_lock( & arp_globals.lock );
211	tmp = arp_translate_message( device_id, protocol, address );	211	tmp = arp_translate_message( device_id, protocol, address );
212	if( tmp ){	212	if( tmp ){
213	* translation = measured_string_copy( tmp );	213	* translation = measured_string_copy( tmp );
214	rwlock_read_unlock( & arp_globals.lock );	214	rwlock_read_unlock( & arp_globals.lock );
215	if( * translation ){	215	if( * translation ){
216	* data = ( ** translation ).value;	216	* data = ( ** translation ).value;
217	return EOK;	217	return EOK;
218	}else{	218	}else{
219	return ENOMEM;	219	return ENOMEM;
220	}	220	}
221	}else{	221	}else{
222	rwlock_read_unlock( & arp_globals.lock );	222	rwlock_read_unlock( & arp_globals.lock );
223	return ENOENT;	223	return ENOENT;
224	}	224	}
225	}	225	}
226		226
227	int arp_initialize( void ){	227	int arp_initialize( void ){
228	ERROR_DECLARE;	228	ERROR_DECLARE;
229		229
230	rwlock_initialize( & arp_globals.lock );	230	rwlock_initialize( & arp_globals.lock );
231	rwlock_write_lock( & arp_globals.lock );	231	rwlock_write_lock( & arp_globals.lock );
232	ERROR_PROPAGATE( arp_cache_initialize( & arp_globals.cache ));	232	ERROR_PROPAGATE( arp_cache_initialize( & arp_globals.cache ));
233	rwlock_write_unlock( & arp_globals.lock );	233	rwlock_write_unlock( & arp_globals.lock );
234	return EOK;	234	return EOK;
235	}	235	}
236		236
237	int arp_proto_create( arp_proto_ref * proto, services_t service, measured_string_ref address ){	237	int arp_proto_create( arp_proto_ref * proto, services_t service, measured_string_ref address ){
238	ERROR_DECLARE;	238	ERROR_DECLARE;
239		239
240	* proto = ( arp_proto_ref ) malloc( sizeof( arp_proto_t ));	240	* proto = ( arp_proto_ref ) malloc( sizeof( arp_proto_t ));
241	if( !( * proto )) return ENOMEM;	241	if( !( * proto )) return ENOMEM;
242	( ** proto ).service = service;	242	( ** proto ).service = service;
243	( ** proto ).addr = address;	243	( ** proto ).addr = address;
244	( ** proto ).addr_data = address->value;	244	( ** proto ).addr_data = address->value;
245	if( ERROR_OCCURRED( arp_addr_initialize( &( ** proto).addresses ))){	245	if( ERROR_OCCURRED( arp_addr_initialize( &( ** proto).addresses ))){
246	free( * proto );	246	free( * proto );
247	return ERROR_CODE;	247	return ERROR_CODE;
248	}	248	}
249	return EOK;	249	return EOK;
250	}	250	}
251		251
252	int arp_device_message( device_id_t device_id, services_t service, services_t protocol, measured_string_ref address ){	252	int arp_device_message( device_id_t device_id, services_t service, services_t protocol, measured_string_ref address ){
253	ERROR_DECLARE;	253	ERROR_DECLARE;
254		254
255	arp_device_ref device;	255	arp_device_ref device;
256	arp_proto_ref proto;	256	arp_proto_ref proto;
257	int index;	257	int index;
258		258
259	rwlock_write_lock( & arp_globals.lock );	259	rwlock_write_lock( & arp_globals.lock );
260	// an existing device?	260	// an existing device?
261	device = arp_cache_find( & arp_globals.cache, device_id );	261	device = arp_cache_find( & arp_globals.cache, device_id );
262	if( device ){	262	if( device ){
263	if( device->service != service ){	263	if( device->service != service ){
264	printf( "Device %d already exists\n", device->device_id );	264	printf( "Device %d already exists\n", device->device_id );
265	rwlock_write_unlock( & arp_globals.lock );	265	rwlock_write_unlock( & arp_globals.lock );
266	return EEXIST;	266	return EEXIST;
267	}	267	}
268	proto = arp_protos_find( & device->protos, protocol );	268	proto = arp_protos_find( & device->protos, protocol );
269	if( proto ){	269	if( proto ){
270	free( proto->addr );	270	free( proto->addr );
271	free( proto->addr_data );	271	free( proto->addr_data );
272	proto->addr = address;	272	proto->addr = address;
273	proto->addr_data = address->value;	273	proto->addr_data = address->value;
274	}else{	274	}else{
275	if( ERROR_OCCURRED( arp_proto_create( & proto, protocol, address ))){	275	if( ERROR_OCCURRED( arp_proto_create( & proto, protocol, address ))){
276	rwlock_write_unlock( & arp_globals.lock );	276	rwlock_write_unlock( & arp_globals.lock );
277	return ERROR_CODE;	277	return ERROR_CODE;
278	}	278	}
279	index = arp_protos_add( & device->protos, proto->service, proto );	279	index = arp_protos_add( & device->protos, proto->service, proto );
280	if( index < 0 ){	280	if( index < 0 ){
281	rwlock_write_unlock( & arp_globals.lock );	281	rwlock_write_unlock( & arp_globals.lock );
282	free( proto );	282	free( proto );
283	return index;	283	return index;
284	}	284	}
-		285	printf( "New protocol added:\n\tdevice id\t= %d\n\tproto\t= %d", device_id, protocol );
285	}	286	}
286	printf( "Cache of the existing device %d cleaned\n", device->device_id );	-
287	}else{	287	}else{
288	index = hardware_map( service );	288	index = hardware_map( service );
289	if( ! index ) return ENOENT;	289	if( ! index ) return ENOENT;
290	// create a new device	290	// create a new device
291	device = ( arp_device_ref ) malloc( sizeof( arp_device_t ));	291	device = ( arp_device_ref ) malloc( sizeof( arp_device_t ));
292	if( ! device ){	292	if( ! device ){
293	rwlock_write_unlock( & arp_globals.lock );	293	rwlock_write_unlock( & arp_globals.lock );
294	return ENOMEM;	294	return ENOMEM;
295	}	295	}
296	device->hardware = index;	296	device->hardware = index;
297	device->device_id = device_id;	297	device->device_id = device_id;
298	if( ERROR_OCCURRED( arp_protos_initialize( & device->protos ))	298	if( ERROR_OCCURRED( arp_protos_initialize( & device->protos ))
299	\|\| ERROR_OCCURRED( arp_proto_create( & proto, protocol, address ))){	299	\|\| ERROR_OCCURRED( arp_proto_create( & proto, protocol, address ))){
300	rwlock_write_unlock( & arp_globals.lock );	300	rwlock_write_unlock( & arp_globals.lock );
301	free( device );	301	free( device );
302	return ERROR_CODE;	302	return ERROR_CODE;
303	}	303	}
304	index = arp_protos_add( & device->protos, proto->service, proto );	304	index = arp_protos_add( & device->protos, proto->service, proto );
305	if( index < 0 ){	305	if( index < 0 ){
306	rwlock_write_unlock( & arp_globals.lock );	306	rwlock_write_unlock( & arp_globals.lock );
307	arp_protos_destroy( & device->protos );	307	arp_protos_destroy( & device->protos );
308	free( device );	308	free( device );
309	return index;	309	return index;
310	}	310	}
311	device->service = service;	311	device->service = service;
312	// bind the new one	312	// bind the new one
313	device->phone = bind_service( device->service, device->device_id, SERVICE_ARP, 0, arp_receiver );	313	device->phone = bind_service( device->service, device->device_id, SERVICE_ARP, 0, arp_receiver );
314	if( device->phone < 0 ){	314	if( device->phone < 0 ){
315	rwlock_write_unlock( & arp_globals.lock );	315	rwlock_write_unlock( & arp_globals.lock );
316	arp_protos_destroy( & device->protos );	316	arp_protos_destroy( & device->protos );
317	free( device );	317	free( device );
318	return EREFUSED;	318	return EREFUSED;
319	}	319	}
320	// get packet dimensions	320	// get packet dimensions
321	if( ERROR_OCCURRED( nil_packet_size_req( device->phone, device_id, & device->addr_len, & device->prefix, & device->content, & device->suffix ))){	321	if( ERROR_OCCURRED( nil_packet_size_req( device->phone, device_id, & device->addr_len, & device->prefix, & device->content, & device->suffix ))){
322	rwlock_write_unlock( & arp_globals.lock );	322	rwlock_write_unlock( & arp_globals.lock );
323	arp_protos_destroy( & device->protos );	323	arp_protos_destroy( & device->protos );
324	free( device );	324	free( device );
325	return ERROR_CODE;	325	return ERROR_CODE;
326	}	326	}
327	// get hardware address	327	// get hardware address
328	if( ERROR_OCCURRED( nil_get_addr( device->phone, device_id, & device->addr, & device->addr_data ))){	328	if( ERROR_OCCURRED( nil_get_addr( device->phone, device_id, & device->addr, & device->addr_data ))){
329	rwlock_write_unlock( & arp_globals.lock );	329	rwlock_write_unlock( & arp_globals.lock );
330	arp_protos_destroy( & device->protos );	330	arp_protos_destroy( & device->protos );
331	free( device );	331	free( device );
332	return ERROR_CODE;	332	return ERROR_CODE;
333	}	333	}
334	// get broadcast address	334	// get broadcast address
335	if( ERROR_OCCURRED( nil_get_broadcast_addr( device->phone, device_id, & device->broadcast_addr, & device->broadcast_data ))){	335	if( ERROR_OCCURRED( nil_get_broadcast_addr( device->phone, device_id, & device->broadcast_addr, & device->broadcast_data ))){
336	rwlock_write_unlock( & arp_globals.lock );	336	rwlock_write_unlock( & arp_globals.lock );
337	free( device->addr );	337	free( device->addr );
338	free( device->addr_data );	338	free( device->addr_data );
339	arp_protos_destroy( & device->protos );	339	arp_protos_destroy( & device->protos );
340	free( device );	340	free( device );
341	return ERROR_CODE;	341	return ERROR_CODE;
342	}	342	}
343	if( ERROR_OCCURRED( arp_cache_add( & arp_globals.cache, device->device_id, device ))){	343	if( ERROR_OCCURRED( arp_cache_add( & arp_globals.cache, device->device_id, device ))){
344	rwlock_write_unlock( & arp_globals.lock );	344	rwlock_write_unlock( & arp_globals.lock );
345	free( device->addr );	345	free( device->addr );
346	free( device->addr_data );	346	free( device->addr_data );
347	free( device->broadcast_addr );	347	free( device->broadcast_addr );
348	free( device->broadcast_data );	348	free( device->broadcast_data );
349	arp_protos_destroy( & device->protos );	349	arp_protos_destroy( & device->protos );
350	free( device );	350	free( device );
351	return ERROR_CODE;	351	return ERROR_CODE;
352	}	352	}
353	printf( "New device registered:\n\tid\t= %d\n\ttype\t= 0x%x\n\tservice\t= %d\n", device->device_id, device->hardware, device->service );	353	printf( "New device registered:\n\tid\t= %d\n\ttype\t= 0x%x\n\tservice\t= %d\n\tproto\t= %d\n", device->device_id, device->hardware, device->service, protocol );
354	}	354	}
355	rwlock_write_unlock( & arp_globals.lock );	355	rwlock_write_unlock( & arp_globals.lock );
356	return EOK;	356	return EOK;
357	}	357	}
358		358
359	measured_string_ref arp_translate_message( device_id_t device_id, services_t protocol, measured_string_ref target ){	359	measured_string_ref arp_translate_message( device_id_t device_id, services_t protocol, measured_string_ref target ){
360	arp_device_ref device;	360	arp_device_ref device;
361	arp_proto_ref proto;	361	arp_proto_ref proto;
362	measured_string_ref addr;	362	measured_string_ref addr;
363	size_t length;	363	size_t length;
364	packet_t packet;	364	packet_t packet;
365	arp_header_ref header;	365	arp_header_ref header;
366		366
367	if( ! target ) return NULL;	367	if( ! target ) return NULL;
368	device = arp_cache_find( & arp_globals.cache, device_id );	368	device = arp_cache_find( & arp_globals.cache, device_id );
369	if( ! device ) return NULL;	369	if( ! device ) return NULL;
370	proto = arp_protos_find( & device->protos, protocol );	370	proto = arp_protos_find( & device->protos, protocol );
371	if(( ! proto ) \|\| ( proto->addr->length != target->length )) return NULL;	371	if(( ! proto ) \|\| ( proto->addr->length != target->length )) return NULL;
372	addr = arp_addr_find( & proto->addresses, target->value, target->length );	372	addr = arp_addr_find( & proto->addresses, target->value, target->length );
373	if( addr ) return addr;	373	if( addr ) return addr;
374	// ARP packet content size = header + ( address + translation ) * 2	374	// ARP packet content size = header + ( address + translation ) * 2
375	length = 8 + ( CONVERT_SIZE( char, uint8_t, proto->addr->length ) + CONVERT_SIZE( char, uint8_t, device->addr->length )) * 2;	375	length = 8 + ( CONVERT_SIZE( char, uint8_t, proto->addr->length ) + CONVERT_SIZE( char, uint8_t, device->addr->length )) * 2;
376	if( length > device->content ) return NULL;	376	if( length > device->content ) return NULL;
377	packet = packet_get_4( arp_globals.net_phone, device->addr_len, device->prefix, length, device->suffix );	377	packet = packet_get_4( arp_globals.net_phone, device->addr_len, device->prefix, length, device->suffix );
378	if( ! packet ) return NULL;	378	if( ! packet ) return NULL;
379	header = ( arp_header_ref ) packet_suffix( packet, length );	379	header = ( arp_header_ref ) packet_suffix( packet, length );
380	header->hardware = htons( device->hardware );	380	header->hardware = htons( device->hardware );
381	header->hardware_length = device->addr->length;	381	header->hardware_length = device->addr->length;
382	header->protocol = htons( protocol_map( device->service, protocol ));	382	header->protocol = htons( protocol_map( device->service, protocol ));
383	header->protocol_length = proto->addr->length;	383	header->protocol_length = proto->addr->length;
384	header->operation = htons( ARPOP_REQUEST );	384	header->operation = htons( ARPOP_REQUEST );
385	length = sizeof( arp_header_t );	385	length = sizeof( arp_header_t );
386	memcpy((( uint8_t * ) header ) + length, device->addr->value, device->addr->length );	386	memcpy((( uint8_t * ) header ) + length, device->addr->value, device->addr->length );
387	length += device->addr->length;	387	length += device->addr->length;
388	memcpy((( uint8_t * ) header ) + length, proto->addr->value, proto->addr->length );	388	memcpy((( uint8_t * ) header ) + length, proto->addr->value, proto->addr->length );
389	length += proto->addr->length;	389	length += proto->addr->length;
390	bzero((( uint8_t * ) header ) + length, device->addr->length );	390	bzero((( uint8_t * ) header ) + length, device->addr->length );
391	length += device->addr->length;	391	length += device->addr->length;
392	memcpy((( uint8_t * ) header ) + length, target->value, target->length );	392	memcpy((( uint8_t * ) header ) + length, target->value, target->length );
393	packet_set_addr( packet, ( uint8_t * ) device->addr->value, ( uint8_t * ) device->broadcast_addr->value, CONVERT_SIZE( char, uint8_t, device->addr->length ));	393	packet_set_addr( packet, ( uint8_t * ) device->addr->value, ( uint8_t * ) device->broadcast_addr->value, CONVERT_SIZE( char, uint8_t, device->addr->length ));
394	nil_send_msg( device->phone, device_id, packet, SERVICE_ARP );	394	nil_send_msg( device->phone, device_id, packet, SERVICE_ARP );
395	return NULL;	395	return NULL;
396	}	396	}
397		397
398	int arp_receive_message( device_id_t device_id, packet_t packet ){	398	int arp_receive_message( device_id_t device_id, packet_t packet ){
399	ERROR_DECLARE;	399	ERROR_DECLARE;
400		400
401	size_t length;	401	size_t length;
402	arp_header_ref header;	402	arp_header_ref header;
403	arp_device_ref device;	403	arp_device_ref device;
404	arp_proto_ref proto;	404	arp_proto_ref proto;
405	measured_string_ref hw_source;	405	measured_string_ref hw_source;
406	uint8_t * src_hw;	406	uint8_t * src_hw;
407	uint8_t * src_proto;	407	uint8_t * src_proto;
408	uint8_t * des_hw;	408	uint8_t * des_hw;
409	uint8_t * des_proto;	409	uint8_t * des_proto;
410		410
411	length = packet_get_data_length( packet );	411	length = packet_get_data_length( packet );
412	if( length <= sizeof( arp_header_t )) return EINVAL;	412	if( length <= sizeof( arp_header_t )) return EINVAL;
413	device = arp_cache_find( & arp_globals.cache, device_id );	413	device = arp_cache_find( & arp_globals.cache, device_id );
414	if( ! device ) return ENOENT;	414	if( ! device ) return ENOENT;
415	header = ( arp_header_ref ) packet_get_data( packet );	415	header = ( arp_header_ref ) packet_get_data( packet );
416	if(( ntohs( header->hardware ) != device->hardware )	416	if(( ntohs( header->hardware ) != device->hardware )
417	\|\| ( length < sizeof( arp_header_t ) + ( header->hardware_length + header->protocol_length ) * 2 )){	417	\|\| ( length < sizeof( arp_header_t ) + ( header->hardware_length + header->protocol_length ) * 2 )){
418	return EINVAL;	418	return EINVAL;
419	}	419	}
420	proto = arp_protos_find( & device->protos, protocol_unmap( device->service, ntohs( header->protocol )));	420	proto = arp_protos_find( & device->protos, protocol_unmap( device->service, ntohs( header->protocol )));
421	if( ! proto ) return ENOENT;	421	if( ! proto ) return ENOENT;
422	src_hw = (( uint8_t * ) header ) + sizeof( arp_header_t );	422	src_hw = (( uint8_t * ) header ) + sizeof( arp_header_t );
423	src_proto = src_hw + header->hardware_length;	423	src_proto = src_hw + header->hardware_length;
424	des_hw = src_proto + header->protocol_length;	424	des_hw = src_proto + header->protocol_length;
425	des_proto = des_hw + header->hardware_length;	425	des_proto = des_hw + header->hardware_length;
426	hw_source = arp_addr_find( & proto->addresses, ( char * ) src_proto, CONVERT_SIZE( uint8_t, char, header->protocol_length ));	426	hw_source = arp_addr_find( & proto->addresses, ( char * ) src_proto, CONVERT_SIZE( uint8_t, char, header->protocol_length ));
427	// exists?	427	// exists?
428	if( hw_source ){	428	if( hw_source ){
429	if( hw_source->length != CONVERT_SIZE( uint8_t, char, header->hardware_length )){	429	if( hw_source->length != CONVERT_SIZE( uint8_t, char, header->hardware_length )){
430	return EINVAL;	430	return EINVAL;
431	}	431	}
432	memcpy( hw_source->value, src_hw, hw_source->length );	432	memcpy( hw_source->value, src_hw, hw_source->length );
433	}	433	}
434	// is my protocol address?	434	// is my protocol address?
435	if( proto->addr->length != CONVERT_SIZE( uint8_t, char, header->hardware_length )){	435	if( proto->addr->length != CONVERT_SIZE( uint8_t, char, header->protocol_length )){
436	return EINVAL;	436	return EINVAL;
437	}	437	}
438	if( ! str_lcmp( proto->addr->value, ( char * ) des_proto, proto->addr->length )){	438	if( ! str_lcmp( proto->addr->value, ( char * ) des_proto, proto->addr->length )){
439	// not already upadted?	439	// not already upadted?
440	if( ! hw_source ){	440	if( ! hw_source ){
441	hw_source = measured_string_create_bulk(( char * ) src_hw, CONVERT_SIZE( uint8_t, char, header->hardware_length ));	441	hw_source = measured_string_create_bulk(( char * ) src_hw, CONVERT_SIZE( uint8_t, char, header->hardware_length ));
442	if( ! hw_source ) return ENOMEM;	442	if( ! hw_source ) return ENOMEM;
443	ERROR_PROPAGATE( arp_addr_add( & proto->addresses, ( char * ) src_proto, CONVERT_SIZE( uint8_t, char, header->protocol_length ), hw_source ));	443	ERROR_PROPAGATE( arp_addr_add( & proto->addresses, ( char * ) src_proto, CONVERT_SIZE( uint8_t, char, header->protocol_length ), hw_source ));
444	}	444	}
445	if( ntohs( header->operation ) == ARPOP_REQUEST ){	445	if( ntohs( header->operation ) == ARPOP_REQUEST ){
446	header->operation = htons( ARPOP_REPLY );	446	header->operation = htons( ARPOP_REPLY );
447	memcpy( des_proto, src_proto, header->protocol_length );	447	memcpy( des_proto, src_proto, header->protocol_length );
448	memcpy( src_proto, proto->addr->value, header->protocol_length );	448	memcpy( src_proto, proto->addr->value, header->protocol_length );
449	memcpy( src_hw, des_hw, header->hardware_length );	449	memcpy( src_hw, device->addr->value, device->addr_len );
450	memcpy( des_hw, hw_source->value, header->hardware_length );	450	memcpy( des_hw, hw_source->value, header->hardware_length );
451	packet_set_addr( packet, src_hw, des_hw, header->hardware_length );	451	packet_set_addr( packet, src_hw, des_hw, header->hardware_length );
452	nil_send_msg( device->phone, device_id, packet, SERVICE_ARP );	452	nil_send_msg( device->phone, device_id, packet, SERVICE_ARP );
453	}else{	453	}else{
454	pq_release( arp_globals.net_phone, packet_get_id( packet ));	454	pq_release( arp_globals.net_phone, packet_get_id( packet ));
455	}	455	}
456	}	456	}
457	return EOK;	457	return EOK;
458	}	458	}
459		459
460	void clear_device( arp_device_ref device ){	460	void clear_device( arp_device_ref device ){
461	int count;	461	int count;
462	arp_proto_ref proto;	462	arp_proto_ref proto;
463		463
464	for( count = arp_protos_count( & device->protos ) - 1; count >= 0; -- count ){	464	for( count = arp_protos_count( & device->protos ) - 1; count >= 0; -- count ){
465	proto = arp_protos_get_index( & device->protos, count );	465	proto = arp_protos_get_index( & device->protos, count );
466	if( proto ){	466	if( proto ){
467	if( proto->addr ) free( proto->addr );	467	if( proto->addr ) free( proto->addr );
468	if( proto->addr_data ) free( proto->addr_data );	468	if( proto->addr_data ) free( proto->addr_data );
469	arp_addr_destroy( & proto->addresses );	469	arp_addr_destroy( & proto->addresses );
470	}	470	}
471	}	471	}
472	arp_protos_clear( & device->protos );	472	arp_protos_clear( & device->protos );
473	}	473	}
474		474
475	int arp_connect_module( services_t service ){	475	int arp_connect_module( services_t service ){
476	return EOK;	476	return EOK;
477	}	477	}
478		478
479	int arp_message( ipc_callid_t callid, ipc_call_t * call, ipc_call_t * answer, int * answer_count ){	479	int arp_message( ipc_callid_t callid, ipc_call_t * call, ipc_call_t * answer, int * answer_count ){
480	ERROR_DECLARE;	480	ERROR_DECLARE;
481		481
482	measured_string_ref address;	482	measured_string_ref address;
483	measured_string_ref translation;	483	measured_string_ref translation;
484	char * data;	484	char * data;
485		485
486	// printf( "message %d - %d\n", IPC_GET_METHOD( * call ), NET_ARP_FIRST );	486	// printf( "message %d - %d\n", IPC_GET_METHOD( * call ), NET_ARP_FIRST );
487	* answer_count = 0;	487	* answer_count = 0;
488	switch( IPC_GET_METHOD( * call )){	488	switch( IPC_GET_METHOD( * call )){
489	case IPC_M_PHONE_HUNGUP:	489	case IPC_M_PHONE_HUNGUP:
490	return EOK;	490	return EOK;
491	case NET_ARP_DEVICE:	491	case NET_ARP_DEVICE:
492	ERROR_PROPAGATE( measured_strings_receive( & address, & data, 1 ));	492	ERROR_PROPAGATE( measured_strings_receive( & address, & data, 1 ));
493	if( ERROR_OCCURRED( arp_device_message( IPC_GET_DEVICE( call ), IPC_GET_SERVICE( call ), ARP_GET_NETIF( call ), address ))){	493	if( ERROR_OCCURRED( arp_device_message( IPC_GET_DEVICE( call ), IPC_GET_SERVICE( call ), ARP_GET_NETIF( call ), address ))){
494	free( address );	494	free( address );
495	free( data );	495	free( data );
496	}	496	}
497	return ERROR_CODE;	497	return ERROR_CODE;
498	case NET_ARP_TRANSLATE:	498	case NET_ARP_TRANSLATE:
499	ERROR_PROPAGATE( measured_strings_receive( & address, & data, 1 ));	499	ERROR_PROPAGATE( measured_strings_receive( & address, & data, 1 ));

Subversion Repositories HelenOS

(root)/branches/network/uspace/srv/net/il/arp/arp.c – Rev 4327 → 4332