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 <fibril_sync.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;
 
/** 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 and the packet is no longer needed.
 *  @returns 1 on success and the packet has been reused.
 *  @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 );
 
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 )
 
task_id_t 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;
 
    fibril_rwlock_write_lock( & arp_globals.lock );
    device = arp_cache_find( & arp_globals.cache, device_id );
    if( ! device ){
        fibril_rwlock_write_unlock( & arp_globals.lock );
        return ENOENT;
    }
    clear_device( device );
    printf( "Device %d cleared\n", device_id );
    fibril_rwlock_write_unlock( & arp_globals.lock );
    return EOK;
}
 
int arp_clean_cache_req( int arp_phone ){
    int             count;
    arp_device_ref  device;
 
    fibril_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 );
    fibril_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;
 
    fibril_rwlock_read_lock( & arp_globals.lock );
    tmp = arp_translate_message( device_id, protocol, address );
    if( tmp ){
        * translation = measured_string_copy( tmp );
        fibril_rwlock_read_unlock( & arp_globals.lock );
        if( * translation ){
            * data = ( ** translation ).value;
            return EOK;
        }else{
            return ENOMEM;
        }
    }else{
        fibril_rwlock_read_unlock( & arp_globals.lock );
        return ENOENT;
    }
}
 
int arp_initialize( async_client_conn_t client_connection ){
    ERROR_DECLARE;
 
    fibril_rwlock_initialize( & arp_globals.lock );
    fibril_rwlock_write_lock( & arp_globals.lock );
    arp_globals.client_connection = client_connection;
    ERROR_PROPAGATE( arp_cache_initialize( & arp_globals.cache ));
    fibril_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;
    hw_type_t       hardware;
 
    fibril_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 );
            fibril_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 ))){
                fibril_rwlock_write_unlock( & arp_globals.lock );
                return ERROR_CODE;
            }
            index = arp_protos_add( & device->protos, proto->service, proto );
            if( index < 0 ){
                fibril_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{
        hardware = hardware_map( service );
        if( ! hardware ) return ENOENT;
        // create a new device
        device = ( arp_device_ref ) malloc( sizeof( arp_device_t ));
        if( ! device ){
            fibril_rwlock_write_unlock( & arp_globals.lock );
            return ENOMEM;
        }
        device->hardware = hardware;
        device->device_id = device_id;
        if( ERROR_OCCURRED( arp_protos_initialize( & device->protos ))
        || ERROR_OCCURRED( arp_proto_create( & proto, protocol, address ))){
            fibril_rwlock_write_unlock( & arp_globals.lock );
            free( device );
            return ERROR_CODE;
        }
        index = arp_protos_add( & device->protos, proto->service, proto );
        if( index < 0 ){
            fibril_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, ( ipcarg_t ) device->device_id, SERVICE_ARP, 0, arp_globals.client_connection );
        if( device->phone < 0 ){
            fibril_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 ))){
            fibril_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 ))){
            fibril_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 ))){
            fibril_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 ))){
            fibril_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 );
    }
    fibril_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 );
    if( ! header ){
        pq_release( arp_globals.net_phone, packet_get_id( packet ));
        return NULL;
    }
    header->hardware = htons( device->hardware );
    header->hardware_length = ( uint8_t ) device->addr->length;
    header->protocol = htons( protocol_map( device->service, protocol ));
    header->protocol_length = ( uint8_t ) 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 );
    if( packet_set_addr( packet, ( uint8_t * ) device->addr->value, ( uint8_t * ) device->broadcast_addr->value, CONVERT_SIZE( char, uint8_t, device->addr->length )) != EOK ){
        pq_release( arp_globals.net_phone, packet_get_id( packet ));
        return NULL;
    }
    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 )
    // TODO how remove conversion from int '2' to uint?
    || ( length < sizeof( arp_header_t ) + ( header->hardware_length + header->protocol_length ) * 2u )){
        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 );
            ERROR_PROPAGATE( packet_set_addr( packet, src_hw, des_hw, header->hardware_length ));
            nil_send_msg( device->phone, device_id, packet, SERVICE_ARP );
            return 1;
        }
    }
    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;
    packet_t            packet;
    packet_t            next;
 
//  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 ));
            fibril_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 ){
                fibril_rwlock_read_unlock( & arp_globals.lock );
                return ENOENT;
            }
            ERROR_CODE = measured_strings_reply( translation, 1 );
            fibril_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 );
        case NET_IL_DEVICE_STATE:
            // do nothing - keep the cache
            return EOK;
        case NET_IL_RECEIVED:
            if( ! ERROR_OCCURRED( packet_translate( arp_globals.net_phone, & packet, IPC_GET_PACKET( call )))){
                fibril_rwlock_read_lock( & arp_globals.lock );
                do{
                    next = pq_detach( packet );
                    ERROR_CODE = arp_receive_message( IPC_GET_DEVICE( call ), packet );
                    if( ERROR_CODE != 1 ) pq_release( arp_globals.net_phone, packet_get_id( packet ));
                    packet = next;
                }while( packet );
                fibril_rwlock_read_unlock( & arp_globals.lock );
            }
            return ERROR_CODE;
    }
    return ENOTSUP;
}
 
/** @}
 */
 

Rev 4558	Rev 4582
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 <fibril_sync.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	/** Creates new protocol specific data.	75	/** Creates new protocol specific data.
76	* @param proto Protocol specific data. Output parameter.	76	* @param proto Protocol specific data. Output parameter.
77	* @param service Protocol module service. Input parameter.	77	* @param service Protocol module service. Input parameter.
78	* @param address Actual protocol device address. Input parameter.	78	* @param address Actual protocol device address. Input parameter.
79	* @returns EOK on success.	79	* @returns EOK on success.
80	* @returns ENOMEM if there is not enough memory left.	80	* @returns ENOMEM if there is not enough memory left.
81	*/	81	*/
82	int arp_proto_create( arp_proto_ref * proto, services_t service, measured_string_ref address );	82	int arp_proto_create( arp_proto_ref * proto, services_t service, measured_string_ref address );
83		83
84	/** Registers the device.	84	/** Registers the device.
85	* Creates new device entry in the cache or updates the protocol address if the device with the device identifier and the driver service exists.	85	* Creates new device entry in the cache or updates the protocol address if the device with the device identifier and the driver service exists.
86	* @param device_id The device identifier. Input parameter.	86	* @param device_id The device identifier. Input parameter.
87	* @param service The device driver service. Input parameter.	87	* @param service The device driver service. Input parameter.
88	* @param protocol The protocol service. Input parameter.	88	* @param protocol The protocol service. Input parameter.
89	* @param address The actual device protocol address.	89	* @param address The actual device protocol address.
90	* @returns EOK on success.	90	* @returns EOK on success.
91	* @returns EEXIST if another device with the same device identifier and different driver service exists.	91	* @returns EEXIST if another device with the same device identifier and different driver service exists.
92	* @returns ENOMEM if there is not enough memory left.	92	* @returns ENOMEM if there is not enough memory left.
93	* @returns Other error codes as defined for the measured_strings_return() function.	93	* @returns Other error codes as defined for the measured_strings_return() function.
94	*/	94	*/
95	int arp_device_message( device_id_t device_id, services_t service, services_t protocol, measured_string_ref address );	95	int arp_device_message( device_id_t device_id, services_t service, services_t protocol, measured_string_ref address );
96		96
97	/** Returns the hardware address for the given protocol address.	97	/** Returns the hardware address for the given protocol address.
98	* Sends the ARP request packet if the hardware address is not found in the cache.	98	* Sends the ARP request packet if the hardware address is not found in the cache.
99	* @param device_id The device identifier. Input parameter.	99	* @param device_id The device identifier. Input parameter.
100	* @param protocol The protocol service. Input parameter.	100	* @param protocol The protocol service. Input parameter.
101	* @param target The target protocol address. Input parameter.	101	* @param target The target protocol address. Input parameter.
102	* @returns The hardware address of the target.	102	* @returns The hardware address of the target.
103	* @returns NULL if the target parameter is NULL.	103	* @returns NULL if the target parameter is NULL.
104	* @returns NULL if the device is not found.	104	* @returns NULL if the device is not found.
105	* @returns NULL if the device packet is too small to send a request.	105	* @returns NULL if the device packet is too small to send a request.
106	* @returns NULL if the hardware address is not found in the cache.	106	* @returns NULL if the hardware address is not found in the cache.
107	*/	107	*/
108	measured_string_ref arp_translate_message( device_id_t device_id, services_t protocol, measured_string_ref target );	108	measured_string_ref arp_translate_message( device_id_t device_id, services_t protocol, measured_string_ref target );
109		109
110	/** Processes the received ARP packet.	110	/** Processes the received ARP packet.
111	* Updates the source hardware address if the source entry exists or the packet is targeted to my protocol address.	111	* Updates the source hardware address if the source entry exists or the packet is targeted to my protocol address.
112	* Responses to the ARP request if the packet is the ARP request and is targeted to my address.	112	* Responses to the ARP request if the packet is the ARP request and is targeted to my address.
113	* @param device_id The source device identifier. Input parameter.	113	* @param device_id The source device identifier. Input parameter.
114	* @param packet The received packet. Input/output parameter.	114	* @param packet The received packet. Input/output parameter.
115	* @returns EOK on success and the packet is no longer needed.	115	* @returns EOK on success and the packet is no longer needed.
116	* @returns 1 on success and the packet has been reused.	116	* @returns 1 on success and the packet has been reused.
117	* @returns EINVAL if the packet is too small to carry the ARP packet.	117	* @returns EINVAL if the packet is too small to carry the ARP packet.
118	* @returns EINVAL if the received address lengths differs from the registered values.	118	* @returns EINVAL if the received address lengths differs from the registered values.
119	* @returns ENOENT if the device is not found in the cache.	119	* @returns ENOENT if the device is not found in the cache.
120	* @returns ENOENT if the protocol for the device is not found in the cache.	120	* @returns ENOENT if the protocol for the device is not found in the cache.
121	* @returns ENOMEM if there is not enough memory left.	121	* @returns ENOMEM if there is not enough memory left.
122	*/	122	*/
123	int arp_receive_message( device_id_t device_id, packet_t packet );	123	int arp_receive_message( device_id_t device_id, packet_t packet );
124		124
125	/** Clears the device specific data.	125	/** Clears the device specific data.
126	* @param device The device specific data.	126	* @param device The device specific data.
127	*/	127	*/
128	void clear_device( arp_device_ref device );	128	void clear_device( arp_device_ref device );
129		129
130	DEVICE_MAP_IMPLEMENT( arp_cache, arp_device_t )	130	DEVICE_MAP_IMPLEMENT( arp_cache, arp_device_t )
131		131
132	INT_MAP_IMPLEMENT( arp_protos, arp_proto_t )	132	INT_MAP_IMPLEMENT( arp_protos, arp_proto_t )
133		133
134	GENERIC_CHAR_MAP_IMPLEMENT( arp_addr, measured_string_t )	134	GENERIC_CHAR_MAP_IMPLEMENT( arp_addr, measured_string_t )
135		135
136	task_id_t arp_task_get_id( void ){	136	task_id_t arp_task_get_id( void ){
137	return task_get_id();	137	return task_get_id();
138	}	138	}
139		139
140	int arp_clear_device_req( int arp_phone, device_id_t device_id ){	140	int arp_clear_device_req( int arp_phone, device_id_t device_id ){
141	arp_device_ref device;	141	arp_device_ref device;
142		142
143	rwlock_write_lock( & arp_globals.lock );	143	fibril_rwlock_write_lock( & arp_globals.lock );
144	device = arp_cache_find( & arp_globals.cache, device_id );	144	device = arp_cache_find( & arp_globals.cache, device_id );
145	if( ! device ){	145	if( ! device ){
146	rwlock_write_unlock( & arp_globals.lock );	146	fibril_rwlock_write_unlock( & arp_globals.lock );
147	return ENOENT;	147	return ENOENT;
148	}	148	}
149	clear_device( device );	149	clear_device( device );
150	printf( "Device %d cleared\n", device_id );	150	printf( "Device %d cleared\n", device_id );
151	rwlock_write_unlock( & arp_globals.lock );	151	fibril_rwlock_write_unlock( & arp_globals.lock );
152	return EOK;	152	return EOK;
153	}	153	}
154		154
155	int arp_clean_cache_req( int arp_phone ){	155	int arp_clean_cache_req( int arp_phone ){
156	int count;	156	int count;
157	arp_device_ref device;	157	arp_device_ref device;
158		158
159	rwlock_write_lock( & arp_globals.lock );	159	fibril_rwlock_write_lock( & arp_globals.lock );
160	for( count = arp_cache_count( & arp_globals.cache ) - 1; count >= 0; -- count ){	160	for( count = arp_cache_count( & arp_globals.cache ) - 1; count >= 0; -- count ){
161	device = arp_cache_get_index( & arp_globals.cache, count );	161	device = arp_cache_get_index( & arp_globals.cache, count );
162	if( device ){	162	if( device ){
163	clear_device( device );	163	clear_device( device );
164	if( device->addr_data ) free( device->addr_data );	164	if( device->addr_data ) free( device->addr_data );
165	if( device->broadcast_data ) free( device->broadcast_data );	165	if( device->broadcast_data ) free( device->broadcast_data );
166	}	166	}
167	}	167	}
168	arp_cache_clear( & arp_globals.cache );	168	arp_cache_clear( & arp_globals.cache );
169	rwlock_write_unlock( & arp_globals.lock );	169	fibril_rwlock_write_unlock( & arp_globals.lock );
170	printf( "Cache cleaned\n" );	170	printf( "Cache cleaned\n" );
171	return EOK;	171	return EOK;
172	}	172	}
173		173
174	int arp_device_req( int arp_phone, device_id_t device_id, services_t protocol, services_t netif, measured_string_ref address ){	174	int arp_device_req( int arp_phone, device_id_t device_id, services_t protocol, services_t netif, measured_string_ref address ){
175	ERROR_DECLARE;	175	ERROR_DECLARE;
176		176
177	measured_string_ref tmp;	177	measured_string_ref tmp;
178		178
179	tmp = measured_string_copy( address );	179	tmp = measured_string_copy( address );
180	if( ERROR_OCCURRED( arp_device_message( device_id, netif, protocol, tmp ))){	180	if( ERROR_OCCURRED( arp_device_message( device_id, netif, protocol, tmp ))){
181	free( tmp->value );	181	free( tmp->value );
182	free( tmp );	182	free( tmp );
183	}	183	}
184	return ERROR_CODE;	184	return ERROR_CODE;
185	}	185	}
186		186
187	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 ){	187	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 ){
188	measured_string_ref tmp;	188	measured_string_ref tmp;
189		189
190	rwlock_read_lock( & arp_globals.lock );	190	fibril_rwlock_read_lock( & arp_globals.lock );
191	tmp = arp_translate_message( device_id, protocol, address );	191	tmp = arp_translate_message( device_id, protocol, address );
192	if( tmp ){	192	if( tmp ){
193	* translation = measured_string_copy( tmp );	193	* translation = measured_string_copy( tmp );
194	rwlock_read_unlock( & arp_globals.lock );	194	fibril_rwlock_read_unlock( & arp_globals.lock );
195	if( * translation ){	195	if( * translation ){
196	* data = ( ** translation ).value;	196	* data = ( ** translation ).value;
197	return EOK;	197	return EOK;
198	}else{	198	}else{
199	return ENOMEM;	199	return ENOMEM;
200	}	200	}
201	}else{	201	}else{
202	rwlock_read_unlock( & arp_globals.lock );	202	fibril_rwlock_read_unlock( & arp_globals.lock );
203	return ENOENT;	203	return ENOENT;
204	}	204	}
205	}	205	}
206		206
207	int arp_initialize( async_client_conn_t client_connection ){	207	int arp_initialize( async_client_conn_t client_connection ){
208	ERROR_DECLARE;	208	ERROR_DECLARE;
209		209
210	rwlock_initialize( & arp_globals.lock );	210	fibril_rwlock_initialize( & arp_globals.lock );
211	rwlock_write_lock( & arp_globals.lock );	211	fibril_rwlock_write_lock( & arp_globals.lock );
212	arp_globals.client_connection = client_connection;	212	arp_globals.client_connection = client_connection;
213	ERROR_PROPAGATE( arp_cache_initialize( & arp_globals.cache ));	213	ERROR_PROPAGATE( arp_cache_initialize( & arp_globals.cache ));
214	rwlock_write_unlock( & arp_globals.lock );	214	fibril_rwlock_write_unlock( & arp_globals.lock );
215	return EOK;	215	return EOK;
216	}	216	}
217		217
218	int arp_proto_create( arp_proto_ref * proto, services_t service, measured_string_ref address ){	218	int arp_proto_create( arp_proto_ref * proto, services_t service, measured_string_ref address ){
219	ERROR_DECLARE;	219	ERROR_DECLARE;
220		220
221	* proto = ( arp_proto_ref ) malloc( sizeof( arp_proto_t ));	221	* proto = ( arp_proto_ref ) malloc( sizeof( arp_proto_t ));
222	if( !( * proto )) return ENOMEM;	222	if( !( * proto )) return ENOMEM;
223	( ** proto ).service = service;	223	( ** proto ).service = service;
224	( ** proto ).addr = address;	224	( ** proto ).addr = address;
225	( ** proto ).addr_data = address->value;	225	( ** proto ).addr_data = address->value;
226	if( ERROR_OCCURRED( arp_addr_initialize( &( ** proto).addresses ))){	226	if( ERROR_OCCURRED( arp_addr_initialize( &( ** proto).addresses ))){
227	free( * proto );	227	free( * proto );
228	return ERROR_CODE;	228	return ERROR_CODE;
229	}	229	}
230	return EOK;	230	return EOK;
231	}	231	}
232		232
233	int arp_device_message( device_id_t device_id, services_t service, services_t protocol, measured_string_ref address ){	233	int arp_device_message( device_id_t device_id, services_t service, services_t protocol, measured_string_ref address ){
234	ERROR_DECLARE;	234	ERROR_DECLARE;
235		235
236	arp_device_ref device;	236	arp_device_ref device;
237	arp_proto_ref proto;	237	arp_proto_ref proto;
238	int index;	238	int index;
239	hw_type_t hardware;	239	hw_type_t hardware;
240		240
241	rwlock_write_lock( & arp_globals.lock );	241	fibril_rwlock_write_lock( & arp_globals.lock );
242	// an existing device?	242	// an existing device?
243	device = arp_cache_find( & arp_globals.cache, device_id );	243	device = arp_cache_find( & arp_globals.cache, device_id );
244	if( device ){	244	if( device ){
245	if( device->service != service ){	245	if( device->service != service ){
246	printf( "Device %d already exists\n", device->device_id );	246	printf( "Device %d already exists\n", device->device_id );
247	rwlock_write_unlock( & arp_globals.lock );	247	fibril_rwlock_write_unlock( & arp_globals.lock );
248	return EEXIST;	248	return EEXIST;
249	}	249	}
250	proto = arp_protos_find( & device->protos, protocol );	250	proto = arp_protos_find( & device->protos, protocol );
251	if( proto ){	251	if( proto ){
252	free( proto->addr );	252	free( proto->addr );
253	free( proto->addr_data );	253	free( proto->addr_data );
254	proto->addr = address;	254	proto->addr = address;
255	proto->addr_data = address->value;	255	proto->addr_data = address->value;
256	}else{	256	}else{
257	if( ERROR_OCCURRED( arp_proto_create( & proto, protocol, address ))){	257	if( ERROR_OCCURRED( arp_proto_create( & proto, protocol, address ))){
258	rwlock_write_unlock( & arp_globals.lock );	258	fibril_rwlock_write_unlock( & arp_globals.lock );
259	return ERROR_CODE;	259	return ERROR_CODE;
260	}	260	}
261	index = arp_protos_add( & device->protos, proto->service, proto );	261	index = arp_protos_add( & device->protos, proto->service, proto );
262	if( index < 0 ){	262	if( index < 0 ){
263	rwlock_write_unlock( & arp_globals.lock );	263	fibril_rwlock_write_unlock( & arp_globals.lock );
264	free( proto );	264	free( proto );
265	return index;	265	return index;
266	}	266	}
267	printf( "New protocol added:\n\tdevice id\t= %d\n\tproto\t= %d", device_id, protocol );	267	printf( "New protocol added:\n\tdevice id\t= %d\n\tproto\t= %d", device_id, protocol );
268	}	268	}
269	}else{	269	}else{
270	hardware = hardware_map( service );	270	hardware = hardware_map( service );
271	if( ! hardware ) return ENOENT;	271	if( ! hardware ) return ENOENT;
272	// create a new device	272	// create a new device
273	device = ( arp_device_ref ) malloc( sizeof( arp_device_t ));	273	device = ( arp_device_ref ) malloc( sizeof( arp_device_t ));
274	if( ! device ){	274	if( ! device ){
275	rwlock_write_unlock( & arp_globals.lock );	275	fibril_rwlock_write_unlock( & arp_globals.lock );
276	return ENOMEM;	276	return ENOMEM;
277	}	277	}
278	device->hardware = hardware;	278	device->hardware = hardware;
279	device->device_id = device_id;	279	device->device_id = device_id;
280	if( ERROR_OCCURRED( arp_protos_initialize( & device->protos ))	280	if( ERROR_OCCURRED( arp_protos_initialize( & device->protos ))
281	\|\| ERROR_OCCURRED( arp_proto_create( & proto, protocol, address ))){	281	\|\| ERROR_OCCURRED( arp_proto_create( & proto, protocol, address ))){
282	rwlock_write_unlock( & arp_globals.lock );	282	fibril_rwlock_write_unlock( & arp_globals.lock );
283	free( device );	283	free( device );
284	return ERROR_CODE;	284	return ERROR_CODE;
285	}	285	}
286	index = arp_protos_add( & device->protos, proto->service, proto );	286	index = arp_protos_add( & device->protos, proto->service, proto );
287	if( index < 0 ){	287	if( index < 0 ){
288	rwlock_write_unlock( & arp_globals.lock );	288	fibril_rwlock_write_unlock( & arp_globals.lock );
289	arp_protos_destroy( & device->protos );	289	arp_protos_destroy( & device->protos );
290	free( device );	290	free( device );
291	return index;	291	return index;
292	}	292	}
293	device->service = service;	293	device->service = service;
294	// bind the new one	294	// bind the new one
295	device->phone = bind_service( device->service, ( ipcarg_t ) device->device_id, SERVICE_ARP, 0, arp_globals.client_connection );	295	device->phone = bind_service( device->service, ( ipcarg_t ) device->device_id, SERVICE_ARP, 0, arp_globals.client_connection );
296	if( device->phone < 0 ){	296	if( device->phone < 0 ){
297	rwlock_write_unlock( & arp_globals.lock );	297	fibril_rwlock_write_unlock( & arp_globals.lock );
298	arp_protos_destroy( & device->protos );	298	arp_protos_destroy( & device->protos );
299	free( device );	299	free( device );
300	return EREFUSED;	300	return EREFUSED;
301	}	301	}
302	// get packet dimensions	302	// get packet dimensions
303	if( ERROR_OCCURRED( nil_packet_size_req( device->phone, device_id, & device->addr_len, & device->prefix, & device->content, & device->suffix ))){	303	if( ERROR_OCCURRED( nil_packet_size_req( device->phone, device_id, & device->addr_len, & device->prefix, & device->content, & device->suffix ))){
304	rwlock_write_unlock( & arp_globals.lock );	304	fibril_rwlock_write_unlock( & arp_globals.lock );
305	arp_protos_destroy( & device->protos );	305	arp_protos_destroy( & device->protos );
306	free( device );	306	free( device );
307	return ERROR_CODE;	307	return ERROR_CODE;
308	}	308	}
309	// get hardware address	309	// get hardware address
310	if( ERROR_OCCURRED( nil_get_addr( device->phone, device_id, & device->addr, & device->addr_data ))){	310	if( ERROR_OCCURRED( nil_get_addr( device->phone, device_id, & device->addr, & device->addr_data ))){
311	rwlock_write_unlock( & arp_globals.lock );	311	fibril_rwlock_write_unlock( & arp_globals.lock );
312	arp_protos_destroy( & device->protos );	312	arp_protos_destroy( & device->protos );
313	free( device );	313	free( device );
314	return ERROR_CODE;	314	return ERROR_CODE;
315	}	315	}
316	// get broadcast address	316	// get broadcast address
317	if( ERROR_OCCURRED( nil_get_broadcast_addr( device->phone, device_id, & device->broadcast_addr, & device->broadcast_data ))){	317	if( ERROR_OCCURRED( nil_get_broadcast_addr( device->phone, device_id, & device->broadcast_addr, & device->broadcast_data ))){
318	rwlock_write_unlock( & arp_globals.lock );	318	fibril_rwlock_write_unlock( & arp_globals.lock );
319	free( device->addr );	319	free( device->addr );
320	free( device->addr_data );	320	free( device->addr_data );
321	arp_protos_destroy( & device->protos );	321	arp_protos_destroy( & device->protos );
322	free( device );	322	free( device );
323	return ERROR_CODE;	323	return ERROR_CODE;
324	}	324	}
325	if( ERROR_OCCURRED( arp_cache_add( & arp_globals.cache, device->device_id, device ))){	325	if( ERROR_OCCURRED( arp_cache_add( & arp_globals.cache, device->device_id, device ))){
326	rwlock_write_unlock( & arp_globals.lock );	326	fibril_rwlock_write_unlock( & arp_globals.lock );
327	free( device->addr );	327	free( device->addr );
328	free( device->addr_data );	328	free( device->addr_data );
329	free( device->broadcast_addr );	329	free( device->broadcast_addr );
330	free( device->broadcast_data );	330	free( device->broadcast_data );
331	arp_protos_destroy( & device->protos );	331	arp_protos_destroy( & device->protos );
332	free( device );	332	free( device );
333	return ERROR_CODE;	333	return ERROR_CODE;
334	}	334	}
335	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 );	335	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 );
336	}	336	}
337	rwlock_write_unlock( & arp_globals.lock );	337	fibril_rwlock_write_unlock( & arp_globals.lock );
338	return EOK;	338	return EOK;
339	}	339	}
340		340
341	measured_string_ref arp_translate_message( device_id_t device_id, services_t protocol, measured_string_ref target ){	341	measured_string_ref arp_translate_message( device_id_t device_id, services_t protocol, measured_string_ref target ){
342	arp_device_ref device;	342	arp_device_ref device;
343	arp_proto_ref proto;	343	arp_proto_ref proto;
344	measured_string_ref addr;	344	measured_string_ref addr;
345	size_t length;	345	size_t length;
346	packet_t packet;	346	packet_t packet;
347	arp_header_ref header;	347	arp_header_ref header;
348		348
349	if( ! target ) return NULL;	349	if( ! target ) return NULL;
350	device = arp_cache_find( & arp_globals.cache, device_id );	350	device = arp_cache_find( & arp_globals.cache, device_id );
351	if( ! device ) return NULL;	351	if( ! device ) return NULL;
352	proto = arp_protos_find( & device->protos, protocol );	352	proto = arp_protos_find( & device->protos, protocol );
353	if(( ! proto ) \|\| ( proto->addr->length != target->length )) return NULL;	353	if(( ! proto ) \|\| ( proto->addr->length != target->length )) return NULL;
354	addr = arp_addr_find( & proto->addresses, target->value, target->length );	354	addr = arp_addr_find( & proto->addresses, target->value, target->length );
355	if( addr ) return addr;	355	if( addr ) return addr;
356	// ARP packet content size = header + ( address + translation ) * 2	356	// ARP packet content size = header + ( address + translation ) * 2
357	length = 8 + ( CONVERT_SIZE( char, uint8_t, proto->addr->length ) + CONVERT_SIZE( char, uint8_t, device->addr->length )) * 2;	357	length = 8 + ( CONVERT_SIZE( char, uint8_t, proto->addr->length ) + CONVERT_SIZE( char, uint8_t, device->addr->length )) * 2;
358	if( length > device->content ) return NULL;	358	if( length > device->content ) return NULL;
359	packet = packet_get_4( arp_globals.net_phone, device->addr_len, device->prefix, length, device->suffix );	359	packet = packet_get_4( arp_globals.net_phone, device->addr_len, device->prefix, length, device->suffix );
360	if( ! packet ) return NULL;	360	if( ! packet ) return NULL;
361	header = ( arp_header_ref ) packet_suffix( packet, length );	361	header = ( arp_header_ref ) packet_suffix( packet, length );
362	if( ! header ){	362	if( ! header ){
363	pq_release( arp_globals.net_phone, packet_get_id( packet ));	363	pq_release( arp_globals.net_phone, packet_get_id( packet ));
364	return NULL;	364	return NULL;
365	}	365	}
366	header->hardware = htons( device->hardware );	366	header->hardware = htons( device->hardware );
367	header->hardware_length = ( uint8_t ) device->addr->length;	367	header->hardware_length = ( uint8_t ) device->addr->length;
368	header->protocol = htons( protocol_map( device->service, protocol ));	368	header->protocol = htons( protocol_map( device->service, protocol ));
369	header->protocol_length = ( uint8_t ) proto->addr->length;	369	header->protocol_length = ( uint8_t ) proto->addr->length;
370	header->operation = htons( ARPOP_REQUEST );	370	header->operation = htons( ARPOP_REQUEST );
371	length = sizeof( arp_header_t );	371	length = sizeof( arp_header_t );
372	memcpy((( uint8_t * ) header ) + length, device->addr->value, device->addr->length );	372	memcpy((( uint8_t * ) header ) + length, device->addr->value, device->addr->length );
373	length += device->addr->length;	373	length += device->addr->length;
374	memcpy((( uint8_t * ) header ) + length, proto->addr->value, proto->addr->length );	374	memcpy((( uint8_t * ) header ) + length, proto->addr->value, proto->addr->length );
375	length += proto->addr->length;	375	length += proto->addr->length;
376	bzero((( uint8_t * ) header ) + length, device->addr->length );	376	bzero((( uint8_t * ) header ) + length, device->addr->length );
377	length += device->addr->length;	377	length += device->addr->length;
378	memcpy((( uint8_t * ) header ) + length, target->value, target->length );	378	memcpy((( uint8_t * ) header ) + length, target->value, target->length );
379	if( packet_set_addr( packet, ( uint8_t * ) device->addr->value, ( uint8_t * ) device->broadcast_addr->value, CONVERT_SIZE( char, uint8_t, device->addr->length )) != EOK ){	379	if( packet_set_addr( packet, ( uint8_t * ) device->addr->value, ( uint8_t * ) device->broadcast_addr->value, CONVERT_SIZE( char, uint8_t, device->addr->length )) != EOK ){
380	pq_release( arp_globals.net_phone, packet_get_id( packet ));	380	pq_release( arp_globals.net_phone, packet_get_id( packet ));
381	return NULL;	381	return NULL;
382	}	382	}
383	nil_send_msg( device->phone, device_id, packet, SERVICE_ARP );	383	nil_send_msg( device->phone, device_id, packet, SERVICE_ARP );
384	return NULL;	384	return NULL;
385	}	385	}
386		386
387	int arp_receive_message( device_id_t device_id, packet_t packet ){	387	int arp_receive_message( device_id_t device_id, packet_t packet ){
388	ERROR_DECLARE;	388	ERROR_DECLARE;
389		389
390	size_t length;	390	size_t length;
391	arp_header_ref header;	391	arp_header_ref header;
392	arp_device_ref device;	392	arp_device_ref device;
393	arp_proto_ref proto;	393	arp_proto_ref proto;
394	measured_string_ref hw_source;	394	measured_string_ref hw_source;
395	uint8_t * src_hw;	395	uint8_t * src_hw;
396	uint8_t * src_proto;	396	uint8_t * src_proto;
397	uint8_t * des_hw;	397	uint8_t * des_hw;
398	uint8_t * des_proto;	398	uint8_t * des_proto;
399		399
400	length = packet_get_data_length( packet );	400	length = packet_get_data_length( packet );
401	if( length <= sizeof( arp_header_t )) return EINVAL;	401	if( length <= sizeof( arp_header_t )) return EINVAL;
402	device = arp_cache_find( & arp_globals.cache, device_id );	402	device = arp_cache_find( & arp_globals.cache, device_id );
403	if( ! device ) return ENOENT;	403	if( ! device ) return ENOENT;
404	header = ( arp_header_ref ) packet_get_data( packet );	404	header = ( arp_header_ref ) packet_get_data( packet );
405	if(( ntohs( header->hardware ) != device->hardware )	405	if(( ntohs( header->hardware ) != device->hardware )
406	// TODO how remove conversion from int '2' to uint?	406	// TODO how remove conversion from int '2' to uint?
407	\|\| ( length < sizeof( arp_header_t ) + ( header->hardware_length + header->protocol_length ) * 2u )){	407	\|\| ( length < sizeof( arp_header_t ) + ( header->hardware_length + header->protocol_length ) * 2u )){
408	return EINVAL;	408	return EINVAL;
409	}	409	}
410	proto = arp_protos_find( & device->protos, protocol_unmap( device->service, ntohs( header->protocol )));	410	proto = arp_protos_find( & device->protos, protocol_unmap( device->service, ntohs( header->protocol )));
411	if( ! proto ) return ENOENT;	411	if( ! proto ) return ENOENT;
412	src_hw = (( uint8_t * ) header ) + sizeof( arp_header_t );	412	src_hw = (( uint8_t * ) header ) + sizeof( arp_header_t );
413	src_proto = src_hw + header->hardware_length;	413	src_proto = src_hw + header->hardware_length;
414	des_hw = src_proto + header->protocol_length;	414	des_hw = src_proto + header->protocol_length;
415	des_proto = des_hw + header->hardware_length;	415	des_proto = des_hw + header->hardware_length;
416	hw_source = arp_addr_find( & proto->addresses, ( char * ) src_proto, CONVERT_SIZE( uint8_t, char, header->protocol_length ));	416	hw_source = arp_addr_find( & proto->addresses, ( char * ) src_proto, CONVERT_SIZE( uint8_t, char, header->protocol_length ));
417	// exists?	417	// exists?
418	if( hw_source ){	418	if( hw_source ){
419	if( hw_source->length != CONVERT_SIZE( uint8_t, char, header->hardware_length )){	419	if( hw_source->length != CONVERT_SIZE( uint8_t, char, header->hardware_length )){
420	return EINVAL;	420	return EINVAL;
421	}	421	}
422	memcpy( hw_source->value, src_hw, hw_source->length );	422	memcpy( hw_source->value, src_hw, hw_source->length );
423	}	423	}
424	// is my protocol address?	424	// is my protocol address?
425	if( proto->addr->length != CONVERT_SIZE( uint8_t, char, header->protocol_length )){	425	if( proto->addr->length != CONVERT_SIZE( uint8_t, char, header->protocol_length )){
426	return EINVAL;	426	return EINVAL;
427	}	427	}
428	if( ! str_lcmp( proto->addr->value, ( char * ) des_proto, proto->addr->length )){	428	if( ! str_lcmp( proto->addr->value, ( char * ) des_proto, proto->addr->length )){
429	// not already upadted?	429	// not already upadted?
430	if( ! hw_source ){	430	if( ! hw_source ){
431	hw_source = measured_string_create_bulk(( char * ) src_hw, CONVERT_SIZE( uint8_t, char, header->hardware_length ));	431	hw_source = measured_string_create_bulk(( char * ) src_hw, CONVERT_SIZE( uint8_t, char, header->hardware_length ));
432	if( ! hw_source ) return ENOMEM;	432	if( ! hw_source ) return ENOMEM;
433	ERROR_PROPAGATE( arp_addr_add( & proto->addresses, ( char * ) src_proto, CONVERT_SIZE( uint8_t, char, header->protocol_length ), hw_source ));	433	ERROR_PROPAGATE( arp_addr_add( & proto->addresses, ( char * ) src_proto, CONVERT_SIZE( uint8_t, char, header->protocol_length ), hw_source ));
434	}	434	}
435	if( ntohs( header->operation ) == ARPOP_REQUEST ){	435	if( ntohs( header->operation ) == ARPOP_REQUEST ){
436	header->operation = htons( ARPOP_REPLY );	436	header->operation = htons( ARPOP_REPLY );
437	memcpy( des_proto, src_proto, header->protocol_length );	437	memcpy( des_proto, src_proto, header->protocol_length );
438	memcpy( src_proto, proto->addr->value, header->protocol_length );	438	memcpy( src_proto, proto->addr->value, header->protocol_length );
439	memcpy( src_hw, device->addr->value, device->addr_len );	439	memcpy( src_hw, device->addr->value, device->addr_len );
440	memcpy( des_hw, hw_source->value, header->hardware_length );	440	memcpy( des_hw, hw_source->value, header->hardware_length );
441	ERROR_PROPAGATE( packet_set_addr( packet, src_hw, des_hw, header->hardware_length ));	441	ERROR_PROPAGATE( packet_set_addr( packet, src_hw, des_hw, header->hardware_length ));
442	nil_send_msg( device->phone, device_id, packet, SERVICE_ARP );	442	nil_send_msg( device->phone, device_id, packet, SERVICE_ARP );
443	return 1;	443	return 1;
444	}	444	}
445	}	445	}
446	return EOK;	446	return EOK;
447	}	447	}
448		448
449	void clear_device( arp_device_ref device ){	449	void clear_device( arp_device_ref device ){
450	int count;	450	int count;
451	arp_proto_ref proto;	451	arp_proto_ref proto;
452		452
453	for( count = arp_protos_count( & device->protos ) - 1; count >= 0; -- count ){	453	for( count = arp_protos_count( & device->protos ) - 1; count >= 0; -- count ){
454	proto = arp_protos_get_index( & device->protos, count );	454	proto = arp_protos_get_index( & device->protos, count );
455	if( proto ){	455	if( proto ){
456	if( proto->addr ) free( proto->addr );	456	if( proto->addr ) free( proto->addr );
457	if( proto->addr_data ) free( proto->addr_data );	457	if( proto->addr_data ) free( proto->addr_data );
458	arp_addr_destroy( & proto->addresses );	458	arp_addr_destroy( & proto->addresses );
459	}	459	}
460	}	460	}
461	arp_protos_clear( & device->protos );	461	arp_protos_clear( & device->protos );
462	}	462	}
463		463
464	int arp_connect_module( services_t service ){	464	int arp_connect_module( services_t service ){
465	return EOK;	465	return EOK;
466	}	466	}
467		467
468	int arp_message( ipc_callid_t callid, ipc_call_t * call, ipc_call_t * answer, int * answer_count ){	468	int arp_message( ipc_callid_t callid, ipc_call_t * call, ipc_call_t * answer, int * answer_count ){
469	ERROR_DECLARE;	469	ERROR_DECLARE;
470		470
471	measured_string_ref address;	471	measured_string_ref address;
472	measured_string_ref translation;	472	measured_string_ref translation;
473	char * data;	473	char * data;
474	packet_t packet;	474	packet_t packet;
475	packet_t next;	475	packet_t next;
476		476
477	// printf( "message %d - %d\n", IPC_GET_METHOD( * call ), NET_ARP_FIRST );	477	// printf( "message %d - %d\n", IPC_GET_METHOD( * call ), NET_ARP_FIRST );
478	* answer_count = 0;	478	* answer_count = 0;
479	switch( IPC_GET_METHOD( * call )){	479	switch( IPC_GET_METHOD( * call )){
480	case IPC_M_PHONE_HUNGUP:	480	case IPC_M_PHONE_HUNGUP:
481	return EOK;	481	return EOK;
482	case NET_ARP_DEVICE:	482	case NET_ARP_DEVICE:
483	ERROR_PROPAGATE( measured_strings_receive( & address, & data, 1 ));	483	ERROR_PROPAGATE( measured_strings_receive( & address, & data, 1 ));
484	if( ERROR_OCCURRED( arp_device_message( IPC_GET_DEVICE( call ), IPC_GET_SERVICE( call ), ARP_GET_NETIF( call ), address ))){	484	if( ERROR_OCCURRED( arp_device_message( IPC_GET_DEVICE( call ), IPC_GET_SERVICE( call ), ARP_GET_NETIF( call ), address ))){
485	free( address );	485	free( address );
486	free( data );	486	free( data );
487	}	487	}
488	return ERROR_CODE;	488	return ERROR_CODE;
489	case NET_ARP_TRANSLATE:	489	case NET_ARP_TRANSLATE:
490	ERROR_PROPAGATE( measured_strings_receive( & address, & data, 1 ));	490	ERROR_PROPAGATE( measured_strings_receive( & address, & data, 1 ));
491	rwlock_read_lock( & arp_globals.lock );	491	fibril_rwlock_read_lock( & arp_globals.lock );
492	translation = arp_translate_message( IPC_GET_DEVICE( call ), IPC_GET_SERVICE( call ), address );	492	translation = arp_translate_message( IPC_GET_DEVICE( call ), IPC_GET_SERVICE( call ), address );
493	free( address );	493	free( address );
494	free( data );	494	free( data );
495	if( ! translation ){	495	if( ! translation ){
496	rwlock_read_unlock( & arp_globals.lock );	496	fibril_rwlock_read_unlock( & arp_globals.lock );
497	return ENOENT;	497	return ENOENT;
498	}	498	}
499	ERROR_CODE = measured_strings_reply( translation, 1 );	499	ERROR_CODE = measured_strings_reply( translation, 1 );
500	rwlock_read_unlock( & arp_globals.lock );	500	fibril_rwlock_read_unlock( & arp_globals.lock );

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(root)/branches/network/uspace/srv/net/il/arp/arp.c – Rev 4558 → 4582