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 <ipc/ipc.h>
#include <ipc/services.h>
 
#include "../../err.h"
#include "../../messages.h"
#include "../../modules.h"
 
#include "../../include/protocol_map.h"
#include "../../netif/device.h"
 
#include "../../structures/measured_strings.h"
#include "../../structures/packet/packet.h"
#include "../../structures/packet/packet_client.h"
 
#include "arp.h"
#include "arp_header.h"
#include "arp_oc.h"
//#include "arp_messages.h"
#include "arp_module.h"
 
/** Returns the device identifier message parameter.
 */
#define IPC_GET_DEVICE( call )      ( device_id_t ) IPC_GET_ARG1( * call )
 
/** Returns the packet identifier message parameter.
 */
#define IPC_GET_PACKET( call )      ( packet_id_t ) IPC_GET_ARG2( * call )
 
/** Returns the protocol service message parameter.
 */
#define IPC_GET_PROTO( call )       ( services_t ) IPC_GET_ARG2( * call )
 
/** Returns the device driver service message parameter.
 */
#define IPC_GET_SERVICE( call )     ( services_t ) IPC_GET_ARG3( * call )
 
/** 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.
 *  @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 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_message( device_id_t device_id );
 
/** Clears the device specific data.
 *  @param device The device specific data.
 */
void    clear_device( arp_device_ref device );
 
/** Clears the whole cache.
 *  @returns EOK on success.
 */
int arp_clean_cache_message( void );
 
/** 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_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;
    aid_t           message;
    ipc_call_t      answer;
    ipcarg_t        result;
    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( "\nDevice %d already exists", 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 result;
            }
        }
        printf( "\nCache of the existing device %d cleaned", device->device_id );
    }else{
        index = protocol_map( service, protocol );
        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( async_req_1_4( device->phone, NET_NIL_PACKET_SPACE, 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
        message = async_send_1( device->phone, NET_NIL_ADDR, device->device_id, & answer );
        if( ERROR_OCCURRED( measured_strings_return( device->phone, & device->addr, & device->addr_data, 1 ))){
            rwlock_write_unlock( & arp_globals.lock );
            arp_protos_destroy( & device->protos );
            free( device );
            async_wait_for( message, NULL );
            return ERROR_CODE;
        }
        async_wait_for( message, & result );
        if( ERROR_OCCURRED( result )){
            rwlock_write_unlock( & arp_globals.lock );
            free( device->addr );
            free( device->addr_data );
            arp_protos_destroy( & device->protos );
            free( device );
            return ERROR_CODE;
        }
        // get broadcast address
        message = async_send_1( device->phone, NET_NIL_BROADCAST_ADDR, device->device_id, & answer );
        if( ERROR_OCCURRED( measured_strings_return( device->phone, & device->broadcast_addr, & device->broadcast_data, 1 ))){
            rwlock_write_unlock( & arp_globals.lock );
            free( device->addr );
            free( device->addr_data );
            arp_protos_destroy( & device->protos );
            free( device );
            async_wait_for( message, NULL );
            return ERROR_CODE;
        }
        async_wait_for( message, & result );
        // add to the cache
        if( ERROR_OCCURRED( result )
        || 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( "\nNew device registered:\n\tid\t= %d\n\ttype\t= 0x%x\n\tservice\t= %d", device->device_id, device->hardware, device->service );
    }
    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;
    rwlock_read_lock( & arp_globals.lock );
    device = arp_cache_find( & arp_globals.cache, device_id );
    if( ! device ){
        rwlock_read_unlock( & arp_globals.lock );
        return NULL;
    }
    proto = arp_protos_find( & device->protos, protocol );
    if(( ! proto ) || ( proto->addr->length != target->length )){
        rwlock_read_unlock( & arp_globals.lock );
        return NULL;
    }
    addr = arp_addr_find( & proto->addresses, target->value, target->length );
    if( addr ){
        rwlock_read_unlock( & arp_globals.lock );
        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 ){
        rwlock_read_unlock( & arp_globals.lock );
        return NULL;
    }
    packet = packet_get_4( arp_globals.networking_phone, device->addr_len, device->prefix, length, device->suffix );
    if( ! packet ){
        rwlock_read_unlock( & arp_globals.lock );
        return NULL;
    }
    header = ( arp_header_ref ) packet_suffix( packet, length );
    header->hardware = device->hardware;
    header->hardware_length = device->addr->length;
    header->protocol = protocol_map( device->service, protocol );
    header->protocol_length = proto->addr->length;
    header->operation = 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 ));
    async_msg_3( device->phone, NET_NETIF_SEND, device_id, SERVICE_ARP, packet_get_id( packet ));
    rwlock_read_unlock( & arp_globals.lock );
    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;
    rwlock_read_lock( & arp_globals.lock );
    device = arp_cache_find( & arp_globals.cache, device_id );
    if( ! device ){
        rwlock_read_unlock( & arp_globals.lock );
        return ENOENT;
    }
    header = ( arp_header_ref ) packet_get_data( packet );
    if(( header->hardware != device->hardware )
    || ( length < sizeof( arp_header_t ) + ( header->hardware_length + header->protocol_length ) * 2 )){
        rwlock_read_unlock( & arp_globals.lock );
        return EINVAL;
    }
    proto = arp_protos_find( & device->protos, protocol_unmap( device->service, header->protocol ));
    if( ! proto ){
        rwlock_read_unlock( & arp_globals.lock );
        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 )){
            rwlock_read_unlock( & arp_globals.lock );
            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->hardware_length )){
        rwlock_read_unlock( & arp_globals.lock );
        return EINVAL;
    }
    if( ! strncmp( 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 ){
                rwlock_read_unlock( & arp_globals.lock );
                return ENOMEM;
            }
            if( ERROR_OCCURRED( arp_addr_add( & proto->addresses, ( char * ) src_proto, CONVERT_SIZE( uint8_t, char, header->protocol_length ), hw_source ))){
                rwlock_read_unlock( & arp_globals.lock );
                return ERROR_CODE;
            }
        }
        if( header->operation == ARPOP_REQUEST ){
            header->operation = ARPOP_REPLY;
            memcpy( des_proto, src_proto, header->protocol_length );
            memcpy( src_proto, proto->addr->value, header->protocol_length );
            memcpy( src_hw, des_hw, header->hardware_length );
            memcpy( des_hw, hw_source->value, header->hardware_length );
            packet_set_addr( packet, src_hw, des_hw, header->hardware_length );
            async_msg_3( device->phone, NET_NETIF_SEND, device_id, SERVICE_ARP, packet_get_id( packet ));
            rwlock_read_unlock( & arp_globals.lock );
        }else{
            rwlock_read_unlock( & arp_globals.lock );
            pq_release( arp_globals.networking_phone, packet_get_id( packet ));
        }
    }
    return EOK;
}
 
int arp_clear_device_message( 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( "\nDevice %d cleared", device_id );
    rwlock_write_unlock( & arp_globals.lock );
    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_clean_cache_message( void ){
    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( "\nCache cleaned" );
    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;
 
    * 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 ), IPC_GET_PROTO( call ), address ))){
                free( address );
                free( data );
            }
            return ERROR_CODE;
        case NET_ARP_TRANSLATE:
            ERROR_PROPAGATE( measured_strings_receive( & address, & data, 1 ));
            translation = arp_translate_message( IPC_GET_DEVICE( call ), IPC_GET_PROTO( call ), address );
            free( address );
            free( data );
            if( ! translation ) return ENOENT;
            return measured_strings_reply( translation, 1 );
        case NET_ARP_CLEAR_DEVICE:
            return arp_clear_device_message( IPC_GET_DEVICE( call ));
        case NET_ARP_CLEAN_CACHE:
            return arp_clean_cache_message();
    }
    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.networking_phone, & packet, IPC_GET_PACKET( icall )))){
                    ERROR_CODE = arp_receive_message( IPC_GET_DEVICE( icall ), packet );
                }
                ipc_answer_0( iid, ERROR_CODE );
                break;
            default:
                ipc_answer_0( iid, ENOTSUP );
        }
        iid = async_get_call( icall );
    }
}
 
/** @}
 */
 

Rev 4163	Rev 4192
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 <rwlock.h>	41	#include <rwlock.h>
41	#include <stdio.h>	42	#include <stdio.h>
42	#include <string.h>	-
43		43
44	#include <ipc/ipc.h>	44	#include <ipc/ipc.h>
45	#include <ipc/services.h>	45	#include <ipc/services.h>
46		46
47	#include "../../err.h"	47	#include "../../err.h"
48	#include "../../messages.h"	48	#include "../../messages.h"
49	#include "../../modules.h"	49	#include "../../modules.h"
50		50
51	#include "../../include/protocol_map.h"	51	#include "../../include/protocol_map.h"
52	#include "../../netif/device.h"	52	#include "../../netif/device.h"
53		53
54	#include "../../structures/measured_strings.h"	54	#include "../../structures/measured_strings.h"
55	#include "../../structures/packet/packet.h"	55	#include "../../structures/packet/packet.h"
56	#include "../../structures/packet/packet_client.h"	56	#include "../../structures/packet/packet_client.h"
57		57
58	#include "arp.h"	58	#include "arp.h"
59	#include "arp_header.h"	59	#include "arp_header.h"
60	#include "arp_oc.h"	60	#include "arp_oc.h"
61	//#include "arp_messages.h"	61	//#include "arp_messages.h"
62	#include "arp_module.h"	62	#include "arp_module.h"
63		63
64	/** Returns the device identifier message parameter.	64	/** Returns the device identifier message parameter.
65	*/	65	*/
66	#define IPC_GET_DEVICE( call ) ( device_id_t ) IPC_GET_ARG1( * call )	66	#define IPC_GET_DEVICE( call ) ( device_id_t ) IPC_GET_ARG1( * call )
67		67
68	/** Returns the packet identifier message parameter.	68	/** Returns the packet identifier message parameter.
69	*/	69	*/
70	#define IPC_GET_PACKET( call ) ( packet_id_t ) IPC_GET_ARG2( * call )	70	#define IPC_GET_PACKET( call ) ( packet_id_t ) IPC_GET_ARG2( * call )
71		71
72	/** Returns the protocol service message parameter.	72	/** Returns the protocol service message parameter.
73	*/	73	*/
74	#define IPC_GET_PROTO( call ) ( services_t ) IPC_GET_ARG2( * call )	74	#define IPC_GET_PROTO( call ) ( services_t ) IPC_GET_ARG2( * call )
75		75
76	/** Returns the device driver service message parameter.	76	/** Returns the device driver service message parameter.
77	*/	77	*/
78	#define IPC_GET_SERVICE( call ) ( services_t ) IPC_GET_ARG3( * call )	78	#define IPC_GET_SERVICE( call ) ( services_t ) IPC_GET_ARG3( * call )
79		79
80	/** ARP global data.	80	/** ARP global data.
81	*/	81	*/
82	arp_globals_t arp_globals;	82	arp_globals_t arp_globals;
83		83
84	/** Creates new protocol specific data.	84	/** Creates new protocol specific data.
85	* @param proto Protocol specific data. Output parameter.	85	* @param proto Protocol specific data. Output parameter.
86	* @param service Protocol module service. Input parameter.	86	* @param service Protocol module service. Input parameter.
87	* @param address Actual protocol device address. Input parameter.	87	* @param address Actual protocol device address. Input parameter.
88	* @returns EOK on success.	88	* @returns EOK on success.
89	* @returns ENOMEM if there is not enough memory left.	89	* @returns ENOMEM if there is not enough memory left.
90	*/	90	*/
91	int arp_proto_create( arp_proto_ref * proto, services_t service, measured_string_ref address );	91	int arp_proto_create( arp_proto_ref * proto, services_t service, measured_string_ref address );
92		92
93	/** Registers the device.	93	/** Registers the device.
94	* Creates new device entry in the cache or updates the protocol address if the device with the device identifier and the driver service exists.	94	* Creates new device entry in the cache or updates the protocol address if the device with the device identifier and the driver service exists.
95	* @param device_id The device identifier. Input parameter.	95	* @param device_id The device identifier. Input parameter.
96	* @param service The device driver service. Input parameter.	96	* @param service The device driver service. Input parameter.
97	* @param protocol The protocol service. Input parameter.	97	* @param protocol The protocol service. Input parameter.
98	* @param address The actual device protocol address.	98	* @param address The actual device protocol address.
99	* @returns EOK on success.	99	* @returns EOK on success.
100	* @returns EEXIST if another device with the same device identifier and different driver service exists.	100	* @returns EEXIST if another device with the same device identifier and different driver service exists.
101	* @returns ENOMEM if there is not enough memory left.	101	* @returns ENOMEM if there is not enough memory left.
102	* @returns Other error codes as defined for the measured_strings_return() function.	102	* @returns Other error codes as defined for the measured_strings_return() function.
103	*/	103	*/
104	int arp_device_message( device_id_t device_id, services_t service, services_t protocol, measured_string_ref address );	104	int arp_device_message( device_id_t device_id, services_t service, services_t protocol, measured_string_ref address );
105		105
106	/** Returns the hardware address for the given protocol address.	106	/** Returns the hardware address for the given protocol address.
107	* Sends the ARP request packet if the hardware address is not found in the cache.	107	* Sends the ARP request packet if the hardware address is not found in the cache.
108	* @param device_id The device identifier. Input parameter.	108	* @param device_id The device identifier. Input parameter.
109	* @param protocol The protocol service. Input parameter.	109	* @param protocol The protocol service. Input parameter.
110	* @param target The target protocol address. Input parameter.	110	* @param target The target protocol address. Input parameter.
111	* @returns The hardware address of the target.	111	* @returns The hardware address of the target.
112	* @returns NULL if the target parameter is NULL.	112	* @returns NULL if the target parameter is NULL.
113	* @returns NULL if the device is not found.	113	* @returns NULL if the device is not found.
114	* @returns NULL if the device packet is too small to send a request.	114	* @returns NULL if the device packet is too small to send a request.
115	* @returns NULL if the hardware address is not found in the cache.	115	* @returns NULL if the hardware address is not found in the cache.
116	*/	116	*/
117	measured_string_ref arp_translate_message( device_id_t device_id, services_t protocol, measured_string_ref target );	117	measured_string_ref arp_translate_message( device_id_t device_id, services_t protocol, measured_string_ref target );
118		118
119	/** Processes the received ARP packet.	119	/** Processes the received ARP packet.
120	* Updates the source hardware address if the source entry exists or the packet is targeted to my protocol address.	120	* Updates the source hardware address if the source entry exists or the packet is targeted to my protocol address.
121	* Responses to the ARP request if the packet is the ARP request and is targeted to my address.	121	* Responses to the ARP request if the packet is the ARP request and is targeted to my address.
122	* @param device_id The source device identifier. Input parameter.	122	* @param device_id The source device identifier. Input parameter.
123	* @param packet The received packet. Input/output parameter.	123	* @param packet The received packet. Input/output parameter.
124	* @returns EOK on success.	124	* @returns EOK on success.
125	* @returns EINVAL if the packet is too small to carry the ARP packet.	125	* @returns EINVAL if the packet is too small to carry the ARP packet.
126	* @returns EINVAL if the received address lengths differs from the registered values.	126	* @returns EINVAL if the received address lengths differs from the registered values.
127	* @returns ENOENT if the device is not found in the cache.	127	* @returns ENOENT if the device is not found in the cache.
128	* @returns ENOENT if the protocol for the device is not found in the cache.	128	* @returns ENOENT if the protocol for the device is not found in the cache.
129	* @returns ENOMEM if there is not enough memory left.	129	* @returns ENOMEM if there is not enough memory left.
130	*/	130	*/
131	int arp_receive_message( device_id_t device_id, packet_t packet );	131	int arp_receive_message( device_id_t device_id, packet_t packet );
132		132
133	/** Clears the device specific data from the cache.	133	/** Clears the device specific data from the cache.
134	* @param device_id The device identifier. Input parameter.	134	* @param device_id The device identifier. Input parameter.
135	* @returns EOK on success.	135	* @returns EOK on success.
136	* @returns ENOENT if the device is not found in the cache.	136	* @returns ENOENT if the device is not found in the cache.
137	*/	137	*/
138	int arp_clear_device_message( device_id_t device_id );	138	int arp_clear_device_message( device_id_t device_id );
139		139
140	/** Clears the device specific data.	140	/** Clears the device specific data.
141	* @param device The device specific data.	141	* @param device The device specific data.
142	*/	142	*/
143	void clear_device( arp_device_ref device );	143	void clear_device( arp_device_ref device );
144		144
145	/** Clears the whole cache.	145	/** Clears the whole cache.
146	* @returns EOK on success.	146	* @returns EOK on success.
147	*/	147	*/
148	int arp_clean_cache_message( void );	148	int arp_clean_cache_message( void );
149		149
150	/** Processes IPC messages from the registered device driver modules in an infinite loop.	150	/** Processes IPC messages from the registered device driver modules in an infinite loop.
151	* @param iid The message identifier. Input parameter.	151	* @param iid The message identifier. Input parameter.
152	* @param icall The message parameters. Input/output parameter.	152	* @param icall The message parameters. Input/output parameter.
153	*/	153	*/
154	void arp_receiver( ipc_callid_t iid, ipc_call_t * icall );	154	void arp_receiver( ipc_callid_t iid, ipc_call_t * icall );
155		155
156	DEVICE_MAP_IMPLEMENT( arp_cache, arp_device_t )	156	DEVICE_MAP_IMPLEMENT( arp_cache, arp_device_t )
157		157
158	INT_MAP_IMPLEMENT( arp_protos, arp_proto_t )	158	INT_MAP_IMPLEMENT( arp_protos, arp_proto_t )
159		159
160	GENERIC_CHAR_MAP_IMPLEMENT( arp_addr, measured_string_t )	160	GENERIC_CHAR_MAP_IMPLEMENT( arp_addr, measured_string_t )
161		161
162	int arp_initialize( void ){	162	int arp_initialize( void ){
163	ERROR_DECLARE;	163	ERROR_DECLARE;
164		164
165	rwlock_initialize( & arp_globals.lock );	165	rwlock_initialize( & arp_globals.lock );
166	rwlock_write_lock( & arp_globals.lock );	166	rwlock_write_lock( & arp_globals.lock );
167	ERROR_PROPAGATE( arp_cache_initialize( & arp_globals.cache ));	167	ERROR_PROPAGATE( arp_cache_initialize( & arp_globals.cache ));
168	rwlock_write_unlock( & arp_globals.lock );	168	rwlock_write_unlock( & arp_globals.lock );
169	return EOK;	169	return EOK;
170	}	170	}
171		171
172	int arp_proto_create( arp_proto_ref * proto, services_t service, measured_string_ref address ){	172	int arp_proto_create( arp_proto_ref * proto, services_t service, measured_string_ref address ){
173	ERROR_DECLARE;	173	ERROR_DECLARE;
174		174
175	* proto = ( arp_proto_ref ) malloc( sizeof( arp_proto_t ));	175	* proto = ( arp_proto_ref ) malloc( sizeof( arp_proto_t ));
176	if( !( * proto )) return ENOMEM;	176	if( !( * proto )) return ENOMEM;
177	( ** proto ).service = service;	177	( ** proto ).service = service;
178	( ** proto ).addr = address;	178	( ** proto ).addr = address;
179	( ** proto ).addr_data = address->value;	179	( ** proto ).addr_data = address->value;
180	if( ERROR_OCCURRED( arp_addr_initialize( &( ** proto).addresses ))){	180	if( ERROR_OCCURRED( arp_addr_initialize( &( ** proto).addresses ))){
181	free( * proto );	181	free( * proto );
182	return ERROR_CODE;	182	return ERROR_CODE;
183	}	183	}
184	return EOK;	184	return EOK;
185	}	185	}
186		186
187	int arp_device_message( device_id_t device_id, services_t service, services_t protocol, measured_string_ref address ){	187	int arp_device_message( device_id_t device_id, services_t service, services_t protocol, measured_string_ref address ){
188	ERROR_DECLARE;	188	ERROR_DECLARE;
189		189
190	arp_device_ref device;	190	arp_device_ref device;
191	aid_t message;	191	aid_t message;
192	ipc_call_t answer;	192	ipc_call_t answer;
193	ipcarg_t result;	193	ipcarg_t result;
194	arp_proto_ref proto;	194	arp_proto_ref proto;
-		195	int index;
195		196
196	rwlock_write_lock( & arp_globals.lock );	197	rwlock_write_lock( & arp_globals.lock );
197	// an existing device?	198	// an existing device?
198	device = arp_cache_find( & arp_globals.cache, device_id );	199	device = arp_cache_find( & arp_globals.cache, device_id );
199	if( device ){	200	if( device ){
200	if( device->service != service ){	201	if( device->service != service ){
201	printf( "\nDevice %d already exists", device->device_id );	202	printf( "\nDevice %d already exists", device->device_id );
202	rwlock_write_unlock( & arp_globals.lock );	203	rwlock_write_unlock( & arp_globals.lock );
203	return EEXIST;	204	return EEXIST;
204	}	205	}
205	proto = arp_protos_find( & device->protos, protocol );	206	proto = arp_protos_find( & device->protos, protocol );
206	if( proto ){	207	if( proto ){
207	free( proto->addr );	208	free( proto->addr );
208	free( proto->addr_data );	209	free( proto->addr_data );
209	proto->addr = address;	210	proto->addr = address;
210	proto->addr_data = address->value;	211	proto->addr_data = address->value;
211	}else{	212	}else{
212	if( ERROR_OCCURRED( arp_proto_create( & proto, protocol, address ))){	213	if( ERROR_OCCURRED( arp_proto_create( & proto, protocol, address ))){
213	rwlock_write_unlock( & arp_globals.lock );	214	rwlock_write_unlock( & arp_globals.lock );
214	return ERROR_CODE;	215	return ERROR_CODE;
215	}	216	}
216	if( ERROR_OCCURRED( arp_protos_add( & device->protos, proto->service, proto ))){	217	index = arp_protos_add( & device->protos, proto->service, proto );
-		218	if( index < 0 ){
217	rwlock_write_unlock( & arp_globals.lock );	219	rwlock_write_unlock( & arp_globals.lock );
218	free( proto );	220	free( proto );
219	return ERROR_CODE;	221	return result;
220	}	222	}
221	}	223	}
222	printf( "\nCache of the existing device %d cleaned", device->device_id );	224	printf( "\nCache of the existing device %d cleaned", device->device_id );
223	}else{	225	}else{
-		226	index = protocol_map( service, protocol );
-		227	if( ! index ) return ENOENT;
224	// create a new device	228	// create a new device
225	device = ( arp_device_ref ) malloc( sizeof( arp_device_t ));	229	device = ( arp_device_ref ) malloc( sizeof( arp_device_t ));
226	if( ! device ){	230	if( ! device ){
227	rwlock_write_unlock( & arp_globals.lock );	231	rwlock_write_unlock( & arp_globals.lock );
228	return ENOMEM;	232	return ENOMEM;
229	}	233	}
-		234	device->hardware = index;
230	device->device_id = device_id;	235	device->device_id = device_id;
231	if( ERROR_OCCURRED( arp_protos_initialize( & device->protos ))	236	if( ERROR_OCCURRED( arp_protos_initialize( & device->protos ))
232	\|\| ERROR_OCCURRED( arp_proto_create( & proto, protocol, address ))){	237	\|\| ERROR_OCCURRED( arp_proto_create( & proto, protocol, address ))){
233	rwlock_write_unlock( & arp_globals.lock );	238	rwlock_write_unlock( & arp_globals.lock );
234	free( device );	239	free( device );
235	return ERROR_CODE;	240	return ERROR_CODE;
236	}	241	}
237	if( ERROR_OCCURRED( arp_protos_add( & device->protos, proto->service, proto ))){	242	index = arp_protos_add( & device->protos, proto->service, proto );
-		243	if( index < 0 ){
238	rwlock_write_unlock( & arp_globals.lock );	244	rwlock_write_unlock( & arp_globals.lock );
239	arp_protos_destroy( & device->protos );	245	arp_protos_destroy( & device->protos );
240	free( device );	246	free( device );
241	return ERROR_CODE;	247	return index;
242	}	248	}
243	device->service = service;	249	device->service = service;
244	// bind the new one	250	// bind the new one
245	device->phone = bind_service( device->service, device->device_id, SERVICE_ARP, 0, arp_receiver );	251	device->phone = bind_service( device->service, device->device_id, SERVICE_ARP, 0, arp_receiver );
-		252	if( device->phone < 0 ){
-		253	rwlock_write_unlock( & arp_globals.lock );
-		254	arp_protos_destroy( & device->protos );
-		255	free( device );
-		256	return EREFUSED;
-		257	}
246	// get packet dimensions	258	// get packet dimensions
247	if( ERROR_OCCURRED( async_req_1_4( device->phone, NET_NIL_PACKET_SPACE, device_id, & device->addr_len, & device->prefix, & device->content, & device->suffix ))){	259	if( ERROR_OCCURRED( async_req_1_4( device->phone, NET_NIL_PACKET_SPACE, device_id, & device->addr_len, & device->prefix, & device->content, & device->suffix ))){
248	rwlock_write_unlock( & arp_globals.lock );	260	rwlock_write_unlock( & arp_globals.lock );
249	arp_protos_destroy( & device->protos );	261	arp_protos_destroy( & device->protos );
250	free( device );	262	free( device );
251	return ERROR_CODE;	263	return ERROR_CODE;
252	}	264	}
253	// get hardware address	265	// get hardware address
254	message = async_send_1( device->phone, NET_NIL_ADDR, device->device_id, & answer );	266	message = async_send_1( device->phone, NET_NIL_ADDR, device->device_id, & answer );
255	if( ERROR_OCCURRED( measured_strings_return( device->phone, & device->addr, & device->addr_data, 1 ))){	267	if( ERROR_OCCURRED( measured_strings_return( device->phone, & device->addr, & device->addr_data, 1 ))){
256	rwlock_write_unlock( & arp_globals.lock );	268	rwlock_write_unlock( & arp_globals.lock );
257	arp_protos_destroy( & device->protos );	269	arp_protos_destroy( & device->protos );
258	free( device );	270	free( device );
259	async_wait_for( message, NULL );	271	async_wait_for( message, NULL );
260	return ERROR_CODE;	272	return ERROR_CODE;
261	}	273	}
262	async_wait_for( message, & result );	274	async_wait_for( message, & result );
263	if( ERROR_OCCURRED( result )){	275	if( ERROR_OCCURRED( result )){
264	rwlock_write_unlock( & arp_globals.lock );	276	rwlock_write_unlock( & arp_globals.lock );
265	free( device->addr );	277	free( device->addr );
266	free( device->addr_data );	278	free( device->addr_data );
267	arp_protos_destroy( & device->protos );	279	arp_protos_destroy( & device->protos );
268	free( device );	280	free( device );
269	return ERROR_CODE;	281	return ERROR_CODE;
270	}	282	}
271	// get broadcast address	283	// get broadcast address
272	message = async_send_1( device->phone, NET_NIL_BROADCAST_ADDR, device->device_id, & answer );	284	message = async_send_1( device->phone, NET_NIL_BROADCAST_ADDR, device->device_id, & answer );
273	if( ERROR_OCCURRED( measured_strings_return( device->phone, & device->broadcast_addr, & device->broadcast_data, 1 ))){	285	if( ERROR_OCCURRED( measured_strings_return( device->phone, & device->broadcast_addr, & device->broadcast_data, 1 ))){
274	rwlock_write_unlock( & arp_globals.lock );	286	rwlock_write_unlock( & arp_globals.lock );
275	free( device->addr );	287	free( device->addr );
276	free( device->addr_data );	288	free( device->addr_data );
277	arp_protos_destroy( & device->protos );	289	arp_protos_destroy( & device->protos );
278	free( device );	290	free( device );
279	async_wait_for( message, NULL );	291	async_wait_for( message, NULL );
280	return ERROR_CODE;	292	return ERROR_CODE;
281	}	293	}
282	async_wait_for( message, & result );	294	async_wait_for( message, & result );
283	// add to the cache	295	// add to the cache
284	if( ERROR_OCCURRED( result )	296	if( ERROR_OCCURRED( result )
285	\|\| ERROR_OCCURRED( arp_cache_add( & arp_globals.cache, device->device_id, device ))){	297	\|\| ERROR_OCCURRED( arp_cache_add( & arp_globals.cache, device->device_id, device ))){
286	rwlock_write_unlock( & arp_globals.lock );	298	rwlock_write_unlock( & arp_globals.lock );
287	free( device->addr );	299	free( device->addr );
288	free( device->addr_data );	300	free( device->addr_data );
289	free( device->broadcast_addr );	301	free( device->broadcast_addr );
290	free( device->broadcast_data );	302	free( device->broadcast_data );
291	arp_protos_destroy( & device->protos );	303	arp_protos_destroy( & device->protos );
292	free( device );	304	free( device );
293	return ERROR_CODE;	305	return ERROR_CODE;
294	}	306	}
295	printf( "\nNew device registered:\n\tid\t= %d\n\ttype\t= %x\n\tservice\t= %d", device->device_id, device->hardware, device->service );	307	printf( "\nNew device registered:\n\tid\t= %d\n\ttype\t= 0x%x\n\tservice\t= %d", device->device_id, device->hardware, device->service );
296	}	308	}
297	rwlock_write_unlock( & arp_globals.lock );	309	rwlock_write_unlock( & arp_globals.lock );
298	return EOK;	310	return EOK;
299	}	311	}
300		312
301	measured_string_ref arp_translate_message( device_id_t device_id, services_t protocol, measured_string_ref target ){	313	measured_string_ref arp_translate_message( device_id_t device_id, services_t protocol, measured_string_ref target ){
302	arp_device_ref device;	314	arp_device_ref device;
303	arp_proto_ref proto;	315	arp_proto_ref proto;
304	measured_string_ref addr;	316	measured_string_ref addr;
305	size_t length;	317	size_t length;
306	packet_t packet;	318	packet_t packet;
307	arp_header_ref header;	319	arp_header_ref header;
308		320
309	if( ! target ) return NULL;	321	if( ! target ) return NULL;
310	rwlock_read_lock( & arp_globals.lock );	322	rwlock_read_lock( & arp_globals.lock );
311	device = arp_cache_find( & arp_globals.cache, device_id );	323	device = arp_cache_find( & arp_globals.cache, device_id );
312	if( ! device ){	324	if( ! device ){
313	rwlock_read_unlock( & arp_globals.lock );	325	rwlock_read_unlock( & arp_globals.lock );
314	return NULL;	326	return NULL;
315	}	327	}
316	proto = arp_protos_find( & device->protos, protocol );	328	proto = arp_protos_find( & device->protos, protocol );
317	if(( ! proto ) \|\| ( proto->addr->length != target->length )){	329	if(( ! proto ) \|\| ( proto->addr->length != target->length )){
318	rwlock_read_unlock( & arp_globals.lock );	330	rwlock_read_unlock( & arp_globals.lock );
319	return NULL;	331	return NULL;
320	}	332	}
321	addr = arp_addr_find( & proto->addresses, target->value, target->length );	333	addr = arp_addr_find( & proto->addresses, target->value, target->length );
322	if( addr ){	334	if( addr ){
323	rwlock_read_unlock( & arp_globals.lock );	335	rwlock_read_unlock( & arp_globals.lock );
324	return addr;	336	return addr;
325	}	337	}
326	// ARP packet content size = header + ( address + translation ) * 2	338	// ARP packet content size = header + ( address + translation ) * 2
327	length = 8 + ( CONVERT_SIZE( char, uint8_t, proto->addr->length ) + CONVERT_SIZE( char, uint8_t, device->addr->length )) * 2;	339	length = 8 + ( CONVERT_SIZE( char, uint8_t, proto->addr->length ) + CONVERT_SIZE( char, uint8_t, device->addr->length )) * 2;
328	if( length > device->content ){	340	if( length > device->content ){
329	rwlock_read_unlock( & arp_globals.lock );	341	rwlock_read_unlock( & arp_globals.lock );
330	return NULL;	342	return NULL;
331	}	343	}
332	packet = packet_get_4( arp_globals.networking_phone, device->addr_len, device->prefix, length, device->suffix );	344	packet = packet_get_4( arp_globals.networking_phone, device->addr_len, device->prefix, length, device->suffix );
333	if( ! packet ){	345	if( ! packet ){
334	rwlock_read_unlock( & arp_globals.lock );	346	rwlock_read_unlock( & arp_globals.lock );
335	return NULL;	347	return NULL;
336	}	348	}
337	header = ( arp_header_ref ) packet_suffix( packet, length );	349	header = ( arp_header_ref ) packet_suffix( packet, length );
338	header->hardware = device->hardware;	350	header->hardware = device->hardware;
339	header->hardware_length = device->addr->length;	351	header->hardware_length = device->addr->length;
340	header->protocol = protocol_map( device->service, protocol );	352	header->protocol = protocol_map( device->service, protocol );
341	header->protocol_length = proto->addr->length;	353	header->protocol_length = proto->addr->length;
342	header->operation = ARPOP_REQUEST;	354	header->operation = ARPOP_REQUEST;
343	length = sizeof( arp_header_t );	355	length = sizeof( arp_header_t );
344	memcpy((( uint8_t * ) header ) + length, device->addr->value, device->addr->length );	356	memcpy((( uint8_t * ) header ) + length, device->addr->value, device->addr->length );
345	length += device->addr->length;	357	length += device->addr->length;
346	memcpy((( uint8_t * ) header ) + length, proto->addr->value, proto->addr->length );	358	memcpy((( uint8_t * ) header ) + length, proto->addr->value, proto->addr->length );
347	length += proto->addr->length;	359	length += proto->addr->length;
348	memset((( uint8_t * ) header ) + length, 0, device->addr->length );	360	bzero((( uint8_t * ) header ) + length, device->addr->length );
349	length += device->addr->length;	361	length += device->addr->length;
350	memcpy((( uint8_t * ) header ) + length, target->value, target->length );	362	memcpy((( uint8_t * ) header ) + length, target->value, target->length );
351	packet_set_addr( packet, ( uint8_t * ) device->addr->value, ( uint8_t * ) device->broadcast_addr->value, CONVERT_SIZE( char, uint8_t, device->addr->length ));	363	packet_set_addr( packet, ( uint8_t * ) device->addr->value, ( uint8_t * ) device->broadcast_addr->value, CONVERT_SIZE( char, uint8_t, device->addr->length ));
352	async_msg_3( device->phone, NET_NETIF_SEND, device_id, SERVICE_ARP, packet_get_id( packet ));	364	async_msg_3( device->phone, NET_NETIF_SEND, device_id, SERVICE_ARP, packet_get_id( packet ));
353	rwlock_read_unlock( & arp_globals.lock );	365	rwlock_read_unlock( & arp_globals.lock );
354	return NULL;	366	return NULL;
355	}	367	}
356		368
357	int arp_receive_message( device_id_t device_id, packet_t packet ){	369	int arp_receive_message( device_id_t device_id, packet_t packet ){
358	ERROR_DECLARE;	370	ERROR_DECLARE;
359		371
360	size_t length;	372	size_t length;
361	arp_header_ref header;	373	arp_header_ref header;
362	arp_device_ref device;	374	arp_device_ref device;
363	arp_proto_ref proto;	375	arp_proto_ref proto;
364	measured_string_ref hw_source;	376	measured_string_ref hw_source;
365	uint8_t * src_hw;	377	uint8_t * src_hw;
366	uint8_t * src_proto;	378	uint8_t * src_proto;
367	uint8_t * des_hw;	379	uint8_t * des_hw;
368	uint8_t * des_proto;	380	uint8_t * des_proto;
369		381
370	length = packet_get_data_length( packet );	382	length = packet_get_data_length( packet );
371	if( length <= sizeof( arp_header_t )) return EINVAL;	383	if( length <= sizeof( arp_header_t )) return EINVAL;
372	rwlock_read_lock( & arp_globals.lock );	384	rwlock_read_lock( & arp_globals.lock );
373	device = arp_cache_find( & arp_globals.cache, device_id );	385	device = arp_cache_find( & arp_globals.cache, device_id );
374	if( ! device ){	386	if( ! device ){
375	rwlock_read_unlock( & arp_globals.lock );	387	rwlock_read_unlock( & arp_globals.lock );
376	return ENOENT;	388	return ENOENT;
377	}	389	}
378	header = ( arp_header_ref ) packet_get_data( packet );	390	header = ( arp_header_ref ) packet_get_data( packet );
379	if(( header->hardware != device->hardware )	391	if(( header->hardware != device->hardware )
380	\|\| ( length < sizeof( arp_header_t ) + ( header->hardware_length + header->protocol_length ) * 2 )){	392	\|\| ( length < sizeof( arp_header_t ) + ( header->hardware_length + header->protocol_length ) * 2 )){
381	rwlock_read_unlock( & arp_globals.lock );	393	rwlock_read_unlock( & arp_globals.lock );
382	return EINVAL;	394	return EINVAL;
383	}	395	}
384	proto = arp_protos_find( & device->protos, protocol_unmap( device->service, header->protocol ));	396	proto = arp_protos_find( & device->protos, protocol_unmap( device->service, header->protocol ));
385	if( ! proto ){	397	if( ! proto ){
386	rwlock_read_unlock( & arp_globals.lock );	398	rwlock_read_unlock( & arp_globals.lock );
387	return ENOENT;	399	return ENOENT;
388	}	400	}
389	src_hw = (( uint8_t * ) header ) + sizeof( arp_header_t );	401	src_hw = (( uint8_t * ) header ) + sizeof( arp_header_t );
390	src_proto = src_hw + header->hardware_length;	402	src_proto = src_hw + header->hardware_length;
391	des_hw = src_proto + header->protocol_length;	403	des_hw = src_proto + header->protocol_length;
392	des_proto = des_hw + header->hardware_length;	404	des_proto = des_hw + header->hardware_length;
393	hw_source = arp_addr_find( & proto->addresses, ( char * ) src_proto, CONVERT_SIZE( uint8_t, char, header->protocol_length ));	405	hw_source = arp_addr_find( & proto->addresses, ( char * ) src_proto, CONVERT_SIZE( uint8_t, char, header->protocol_length ));
394	// exists?	406	// exists?
395	if( hw_source ){	407	if( hw_source ){
396	if( hw_source->length != CONVERT_SIZE( uint8_t, char, header->hardware_length )){	408	if( hw_source->length != CONVERT_SIZE( uint8_t, char, header->hardware_length )){
397	rwlock_read_unlock( & arp_globals.lock );	409	rwlock_read_unlock( & arp_globals.lock );
398	return EINVAL;	410	return EINVAL;
399	}	411	}
400	memcpy( hw_source->value, src_hw, hw_source->length );	412	memcpy( hw_source->value, src_hw, hw_source->length );
401	}	413	}
402	// is my protocol address?	414	// is my protocol address?
403	if( proto->addr->length != CONVERT_SIZE( uint8_t, char, header->hardware_length )){	415	if( proto->addr->length != CONVERT_SIZE( uint8_t, char, header->hardware_length )){
404	rwlock_read_unlock( & arp_globals.lock );	416	rwlock_read_unlock( & arp_globals.lock );
405	return EINVAL;	417	return EINVAL;
406	}	418	}
407	if( ! strncmp( proto->addr->value, ( char * ) des_proto, proto->addr->length )){	419	if( ! strncmp( proto->addr->value, ( char * ) des_proto, proto->addr->length )){
408	// not already upadted?	420	// not already upadted?
409	if( ! hw_source ){	421	if( ! hw_source ){
410	hw_source = measured_string_create_bulk(( char * ) src_hw, CONVERT_SIZE( uint8_t, char, header->hardware_length ));	422	hw_source = measured_string_create_bulk(( char * ) src_hw, CONVERT_SIZE( uint8_t, char, header->hardware_length ));
411	if( ! hw_source ){	423	if( ! hw_source ){
412	rwlock_read_unlock( & arp_globals.lock );	424	rwlock_read_unlock( & arp_globals.lock );
413	return ENOMEM;	425	return ENOMEM;
414	}	426	}
415	if( ERROR_OCCURRED( arp_addr_add( & proto->addresses, ( char * ) src_proto, CONVERT_SIZE( uint8_t, char, header->protocol_length ), hw_source ))){	427	if( ERROR_OCCURRED( arp_addr_add( & proto->addresses, ( char * ) src_proto, CONVERT_SIZE( uint8_t, char, header->protocol_length ), hw_source ))){
416	rwlock_read_unlock( & arp_globals.lock );	428	rwlock_read_unlock( & arp_globals.lock );
417	return ERROR_CODE;	429	return ERROR_CODE;
418	}	430	}
419	}	431	}
420	if( header->operation == ARPOP_REQUEST ){	432	if( header->operation == ARPOP_REQUEST ){
421	header->operation = ARPOP_REPLY;	433	header->operation = ARPOP_REPLY;
422	memcpy( des_proto, src_proto, header->protocol_length );	434	memcpy( des_proto, src_proto, header->protocol_length );
423	memcpy( src_proto, proto->addr->value, header->protocol_length );	435	memcpy( src_proto, proto->addr->value, header->protocol_length );
424	memcpy( src_hw, des_hw, header->hardware_length );	436	memcpy( src_hw, des_hw, header->hardware_length );
425	memcpy( des_hw, hw_source->value, header->hardware_length );	437	memcpy( des_hw, hw_source->value, header->hardware_length );
426	packet_set_addr( packet, src_hw, des_hw, header->hardware_length );	438	packet_set_addr( packet, src_hw, des_hw, header->hardware_length );
427	async_msg_3( device->phone, NET_NETIF_SEND, device_id, SERVICE_ARP, packet_get_id( packet ));	439	async_msg_3( device->phone, NET_NETIF_SEND, device_id, SERVICE_ARP, packet_get_id( packet ));
428	rwlock_read_unlock( & arp_globals.lock );	440	rwlock_read_unlock( & arp_globals.lock );
429	}else{	441	}else{
430	rwlock_read_unlock( & arp_globals.lock );	442	rwlock_read_unlock( & arp_globals.lock );
431	packet_release( arp_globals.networking_phone, packet_get_id( packet ));	443	pq_release( arp_globals.networking_phone, packet_get_id( packet ));
432	}	444	}
433	}	445	}
434	return EOK;	446	return EOK;
435	}	447	}
436		448
437	int arp_clear_device_message( device_id_t device_id ){	449	int arp_clear_device_message( device_id_t device_id ){
438	arp_device_ref device;	450	arp_device_ref device;
439		451
440	rwlock_write_lock( & arp_globals.lock );	452	rwlock_write_lock( & arp_globals.lock );
441	device = arp_cache_find( & arp_globals.cache, device_id );	453	device = arp_cache_find( & arp_globals.cache, device_id );
442	if( ! device ){	454	if( ! device ){
443	rwlock_write_unlock( & arp_globals.lock );	455	rwlock_write_unlock( & arp_globals.lock );
444	return ENOENT;	456	return ENOENT;
445	}	457	}
446	clear_device( device );	458	clear_device( device );
447	printf( "\nDevice %d cleared", device_id );	459	printf( "\nDevice %d cleared", device_id );
448	rwlock_write_unlock( & arp_globals.lock );	460	rwlock_write_unlock( & arp_globals.lock );
449	return EOK;	461	return EOK;
450	}	462	}
451		463
452	void clear_device( arp_device_ref device ){	464	void clear_device( arp_device_ref device ){
453	int count;	465	int count;
454	arp_proto_ref proto;	466	arp_proto_ref proto;
455		467
456	count = arp_protos_count( & device->protos );	468	for( count = arp_protos_count( & device->protos ) - 1; count >= 0; -- count ){
457	while( count > 0 ){	-
458	proto = arp_protos_get_index( & device->protos, count );	469	proto = arp_protos_get_index( & device->protos, count );
-		470	if( proto ){
459	if( proto->addr ) free( proto->addr );	471	if( proto->addr ) free( proto->addr );
460	if( proto->addr_data ) free( proto->addr_data );	472	if( proto->addr_data ) free( proto->addr_data );
461	arp_addr_destroy( & proto->addresses );	473	arp_addr_destroy( & proto->addresses );
462	-- count;	474	}
463	}	475	}
464	arp_protos_clear( & device->protos );	476	arp_protos_clear( & device->protos );
465	}	477	}
466		478
467	int arp_clean_cache_message( void ){	479	int arp_clean_cache_message( void ){
468	int count;	480	int count;
469	arp_device_ref device;	481	arp_device_ref device;
470		482
471	rwlock_write_lock( & arp_globals.lock );	483	rwlock_write_lock( & arp_globals.lock );
472	count = arp_cache_count( & arp_globals.cache );	484	for( count = arp_cache_count( & arp_globals.cache ) - 1; count >= 0; -- count ){
473	while( count > 0 ){	-
474	device = arp_cache_get_index( & arp_globals.cache, count );	485	device = arp_cache_get_index( & arp_globals.cache, count );
475	if( device ){	486	if( device ){
476	clear_device( device );	487	clear_device( device );
477	if( device->addr_data ) free( device->addr_data );	488	if( device->addr_data ) free( device->addr_data );
478	if( device->broadcast_data ) free( device->broadcast_data );	489	if( device->broadcast_data ) free( device->broadcast_data );
479	}	490	}
480	}	491	}
481	arp_cache_clear( & arp_globals.cache );	492	arp_cache_clear( & arp_globals.cache );
482	rwlock_write_unlock( & arp_globals.lock );	493	rwlock_write_unlock( & arp_globals.lock );
483	printf( "\nCache cleaned" );	494	printf( "\nCache cleaned" );
484	return EOK;	495	return EOK;
485	}	496	}
486		497

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(root)/branches/network/uspace/srv/net/il/arp/arp.c – Rev 4163 → 4192