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/byteorder.h"
#include "../../include/device.h"
#include "../../include/protocol_map.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 = hardware_map( service );
        if( ! index ) return ENOENT;
        // create a new device
        device = ( arp_device_ref ) malloc( sizeof( arp_device_t ));
        if( ! device ){
            rwlock_write_unlock( & arp_globals.lock );
            return ENOMEM;
        }
        device->hardware = index;
        device->device_id = device_id;
        if( ERROR_OCCURRED( arp_protos_initialize( & device->protos ))
        || ERROR_OCCURRED( arp_proto_create( & proto, protocol, address ))){
            rwlock_write_unlock( & arp_globals.lock );
            free( device );
            return ERROR_CODE;
        }
        index = arp_protos_add( & device->protos, proto->service, proto );
        if( index < 0 ){
            rwlock_write_unlock( & arp_globals.lock );
            arp_protos_destroy( & device->protos );
            free( device );
            return index;
        }
        device->service = service;
        // bind the new one
        device->phone = bind_service( device->service, device->device_id, SERVICE_ARP, 0, arp_receiver );
        if( device->phone < 0 ){
            rwlock_write_unlock( & arp_globals.lock );
            arp_protos_destroy( & device->protos );
            free( device );
            return EREFUSED;
        }
        // get packet dimensions
        if( ERROR_OCCURRED( 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;
 
    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.networking_phone, device->addr_len, device->prefix, length, device->suffix );
    if( ! packet ) return NULL;
 
 
 
    header = ( arp_header_ref ) packet_suffix( packet, length );
    header->hardware = htons( device->hardware );
    header->hardware_length = device->addr->length;
    header->protocol = htons( protocol_map( device->service, protocol ));
    header->protocol_length = proto->addr->length;
    header->operation = htons( ARPOP_REQUEST );
    length = sizeof( arp_header_t );
    memcpy((( uint8_t * ) header ) + length, device->addr->value, device->addr->length );
    length += device->addr->length;
    memcpy((( uint8_t * ) header ) + length, proto->addr->value, proto->addr->length );
    length += proto->addr->length;
    bzero((( uint8_t * ) header ) + length, device->addr->length );
    length += device->addr->length;
    memcpy((( uint8_t * ) header ) + length, target->value, target->length );
    packet_set_addr( packet, ( uint8_t * ) device->addr->value, ( uint8_t * ) device->broadcast_addr->value, CONVERT_SIZE( char, uint8_t, device->addr->length ));
    async_msg_3( device->phone, NET_NIL_SEND, device_id, packet_get_id( packet ), SERVICE_ARP );
 
    return NULL;
}
 
int arp_receive_message( device_id_t device_id, packet_t packet ){
    ERROR_DECLARE;
 
    size_t              length;
    arp_header_ref      header;
    arp_device_ref      device;
    arp_proto_ref       proto;
    measured_string_ref hw_source;
    uint8_t *           src_hw;
    uint8_t *           src_proto;
    uint8_t *           des_hw;
    uint8_t *           des_proto;
 
    length = packet_get_data_length( packet );
    if( length <= sizeof( arp_header_t )) return EINVAL;
 
    device = arp_cache_find( & arp_globals.cache, device_id );
 
 
    if( ! device ) return ENOENT;
 
    header = ( arp_header_ref ) packet_get_data( packet );
    if(( ntohs( header->hardware ) != device->hardware )
    || ( length < sizeof( arp_header_t ) + ( header->hardware_length + header->protocol_length ) * 2 )){
 
        return EINVAL;
    }
    proto = arp_protos_find( & device->protos, protocol_unmap( device->service, ntohs( header->protocol )));
 
 
    if( ! proto ) return ENOENT;
 
    src_hw = (( uint8_t * ) header ) + sizeof( arp_header_t );
    src_proto = src_hw + header->hardware_length;
    des_hw = src_proto + header->protocol_length;
    des_proto = des_hw + header->hardware_length;
    hw_source = arp_addr_find( & proto->addresses, ( char * ) src_proto, CONVERT_SIZE( uint8_t, char, header->protocol_length ));
    // exists?
    if( hw_source ){
        if( hw_source->length != CONVERT_SIZE( uint8_t, char, header->hardware_length )){
 
            return EINVAL;
        }
        memcpy( hw_source->value, src_hw, hw_source->length );
    }
    // is my protocol address?
    if( proto->addr->length != CONVERT_SIZE( uint8_t, char, header->hardware_length )){
 
        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 ) 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, 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_NIL_SEND, device_id, packet_get_id( packet ), SERVICE_ARP );
 
        }else{
 
            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;
 
//  printf( "\nmessage %d - %d", 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 ), IPC_GET_PROTO( call ), address ))){
                free( address );
                free( data );
            }
            return ERROR_CODE;
        case NET_ARP_TRANSLATE:
            ERROR_PROPAGATE( measured_strings_receive( & address, & data, 1 ));
            rwlock_read_lock( & arp_globals.lock );
            translation = arp_translate_message( IPC_GET_DEVICE( call ), IPC_GET_PROTO( call ), address );
            free( address );
            free( data );
            if( ! translation ){
                rwlock_read_unlock( & arp_globals.lock );
                return ENOENT;
            }
            ERROR_CODE = measured_strings_reply( translation, 1 );
            rwlock_read_unlock( & arp_globals.lock );
            return ERROR_CODE;
        case NET_ARP_CLEAR_DEVICE:
            return arp_clear_device_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 )))){
                    rwlock_read_lock( & arp_globals.lock );
                    ERROR_CODE = arp_receive_message( IPC_GET_DEVICE( icall ), packet );
                    rwlock_read_unlock( & arp_globals.lock );
                }
                ipc_answer_0( iid, ERROR_CODE );
                break;
            default:
                ipc_answer_0( iid, ENOTSUP );
        }
        iid = async_get_call( icall );
    }
}
 
/** @}
 */
 

Rev 4192	Rev 4243
1	/*	1	/*
2	* Copyright (c) 2009 Lukas Mejdrech	2	* Copyright (c) 2009 Lukas Mejdrech
3	* All rights reserved.	3	* All rights reserved.
4	*	4	*
5	* Redistribution and use in source and binary forms, with or without	5	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions	6	* modification, are permitted provided that the following conditions
7	* are met:	7	* are met:
8	*	8	*
9	* - Redistributions of source code must retain the above copyright	9	* - Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.	10	* notice, this list of conditions and the following disclaimer.
11	* - Redistributions in binary form must reproduce the above copyright	11	* - Redistributions in binary form must reproduce the above copyright
12	* notice, this list of conditions and the following disclaimer in the	12	* notice, this list of conditions and the following disclaimer in the
13	* documentation and/or other materials provided with the distribution.	13	* documentation and/or other materials provided with the distribution.
14	* - The name of the author may not be used to endorse or promote products	14	* - The name of the author may not be used to endorse or promote products
15	* derived from this software without specific prior written permission.	15	* derived from this software without specific prior written permission.
16	*	16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES	18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF	25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27	*/	27	*/
28		28
29	/** @addtogroup arp	29	/** @addtogroup arp
30	* @{	30	* @{
31	*/	31	*/
32		32
33	/** @file	33	/** @file
34	* ARP module implementation.	34	* ARP module implementation.
35	* @see arp.h	35	* @see arp.h
36	*/	36	*/
37		37
38	#include <async.h>	38	#include <async.h>
39	#include <malloc.h>	39	#include <malloc.h>
40	#include <mem.h>	40	#include <mem.h>
41	#include <rwlock.h>	41	#include <rwlock.h>
42	#include <stdio.h>	42	#include <stdio.h>
43		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/byteorder.h"
-		52	#include "../../include/device.h"
51	#include "../../include/protocol_map.h"	53	#include "../../include/protocol_map.h"
52	#include "../../netif/device.h"	-
53		54
54	#include "../../structures/measured_strings.h"	55	#include "../../structures/measured_strings.h"
55	#include "../../structures/packet/packet.h"	56	#include "../../structures/packet/packet.h"
56	#include "../../structures/packet/packet_client.h"	57	#include "../../structures/packet/packet_client.h"
57		58
58	#include "arp.h"	59	#include "arp.h"
59	#include "arp_header.h"	60	#include "arp_header.h"
60	#include "arp_oc.h"	61	#include "arp_oc.h"
61	//#include "arp_messages.h"	62	//#include "arp_messages.h"
62	#include "arp_module.h"	63	#include "arp_module.h"
63		64
64	/** Returns the device identifier message parameter.	65	/** Returns the device identifier message parameter.
65	*/	66	*/
66	#define IPC_GET_DEVICE( call ) ( device_id_t ) IPC_GET_ARG1( * call )	67	#define IPC_GET_DEVICE( call ) ( device_id_t ) IPC_GET_ARG1( * call )
67		68
68	/** Returns the packet identifier message parameter.	69	/** Returns the packet identifier message parameter.
69	*/	70	*/
70	#define IPC_GET_PACKET( call ) ( packet_id_t ) IPC_GET_ARG2( * call )	71	#define IPC_GET_PACKET( call ) ( packet_id_t ) IPC_GET_ARG2( * call )
71		72
72	/** Returns the protocol service message parameter.	73	/** Returns the protocol service message parameter.
73	*/	74	*/
74	#define IPC_GET_PROTO( call ) ( services_t ) IPC_GET_ARG2( * call )	75	#define IPC_GET_PROTO( call ) ( services_t ) IPC_GET_ARG2( * call )
75		76
76	/** Returns the device driver service message parameter.	77	/** Returns the device driver service message parameter.
77	*/	78	*/
78	#define IPC_GET_SERVICE( call ) ( services_t ) IPC_GET_ARG3( * call )	79	#define IPC_GET_SERVICE( call ) ( services_t ) IPC_GET_ARG3( * call )
79		80
80	/** ARP global data.	81	/** ARP global data.
81	*/	82	*/
82	arp_globals_t arp_globals;	83	arp_globals_t arp_globals;
83		84
84	/** Creates new protocol specific data.	85	/** Creates new protocol specific data.
85	* @param proto Protocol specific data. Output parameter.	86	* @param proto Protocol specific data. Output parameter.
86	* @param service Protocol module service. Input parameter.	87	* @param service Protocol module service. Input parameter.
87	* @param address Actual protocol device address. Input parameter.	88	* @param address Actual protocol device address. Input parameter.
88	* @returns EOK on success.	89	* @returns EOK on success.
89	* @returns ENOMEM if there is not enough memory left.	90	* @returns ENOMEM if there is not enough memory left.
90	*/	91	*/
91	int arp_proto_create( arp_proto_ref * proto, services_t service, measured_string_ref address );	92	int arp_proto_create( arp_proto_ref * proto, services_t service, measured_string_ref address );
92		93
93	/** Registers the device.	94	/** 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.	95	* 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.	96	* @param device_id The device identifier. Input parameter.
96	* @param service The device driver service. Input parameter.	97	* @param service The device driver service. Input parameter.
97	* @param protocol The protocol service. Input parameter.	98	* @param protocol The protocol service. Input parameter.
98	* @param address The actual device protocol address.	99	* @param address The actual device protocol address.
99	* @returns EOK on success.	100	* @returns EOK on success.
100	* @returns EEXIST if another device with the same device identifier and different driver service exists.	101	* @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.	102	* @returns ENOMEM if there is not enough memory left.
102	* @returns Other error codes as defined for the measured_strings_return() function.	103	* @returns Other error codes as defined for the measured_strings_return() function.
103	*/	104	*/
104	int arp_device_message( device_id_t device_id, services_t service, services_t protocol, measured_string_ref address );	105	int arp_device_message( device_id_t device_id, services_t service, services_t protocol, measured_string_ref address );
105		106
106	/** Returns the hardware address for the given protocol address.	107	/** 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.	108	* Sends the ARP request packet if the hardware address is not found in the cache.
108	* @param device_id The device identifier. Input parameter.	109	* @param device_id The device identifier. Input parameter.
109	* @param protocol The protocol service. Input parameter.	110	* @param protocol The protocol service. Input parameter.
110	* @param target The target protocol address. Input parameter.	111	* @param target The target protocol address. Input parameter.
111	* @returns The hardware address of the target.	112	* @returns The hardware address of the target.
112	* @returns NULL if the target parameter is NULL.	113	* @returns NULL if the target parameter is NULL.
113	* @returns NULL if the device is not found.	114	* @returns NULL if the device is not found.
114	* @returns NULL if the device packet is too small to send a request.	115	* @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.	116	* @returns NULL if the hardware address is not found in the cache.
116	*/	117	*/
117	measured_string_ref arp_translate_message( device_id_t device_id, services_t protocol, measured_string_ref target );	118	measured_string_ref arp_translate_message( device_id_t device_id, services_t protocol, measured_string_ref target );
118		119
119	/** Processes the received ARP packet.	120	/** 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.	121	* 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.	122	* 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.	123	* @param device_id The source device identifier. Input parameter.
123	* @param packet The received packet. Input/output parameter.	124	* @param packet The received packet. Input/output parameter.
124	* @returns EOK on success.	125	* @returns EOK on success.
125	* @returns EINVAL if the packet is too small to carry the ARP packet.	126	* @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.	127	* @returns EINVAL if the received address lengths differs from the registered values.
127	* @returns ENOENT if the device is not found in the cache.	128	* @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.	129	* @returns ENOENT if the protocol for the device is not found in the cache.
129	* @returns ENOMEM if there is not enough memory left.	130	* @returns ENOMEM if there is not enough memory left.
130	*/	131	*/
131	int arp_receive_message( device_id_t device_id, packet_t packet );	132	int arp_receive_message( device_id_t device_id, packet_t packet );
132		133
133	/** Clears the device specific data from the cache.	134	/** Clears the device specific data from the cache.
134	* @param device_id The device identifier. Input parameter.	135	* @param device_id The device identifier. Input parameter.
135	* @returns EOK on success.	136	* @returns EOK on success.
136	* @returns ENOENT if the device is not found in the cache.	137	* @returns ENOENT if the device is not found in the cache.
137	*/	138	*/
138	int arp_clear_device_message( device_id_t device_id );	139	int arp_clear_device_message( device_id_t device_id );
139		140
140	/** Clears the device specific data.	141	/** Clears the device specific data.
141	* @param device The device specific data.	142	* @param device The device specific data.
142	*/	143	*/
143	void clear_device( arp_device_ref device );	144	void clear_device( arp_device_ref device );
144		145
145	/** Clears the whole cache.	146	/** Clears the whole cache.
146	* @returns EOK on success.	147	* @returns EOK on success.
147	*/	148	*/
148	int arp_clean_cache_message( void );	149	int arp_clean_cache_message( void );
149		150
150	/** Processes IPC messages from the registered device driver modules in an infinite loop.	151	/** Processes IPC messages from the registered device driver modules in an infinite loop.
151	* @param iid The message identifier. Input parameter.	152	* @param iid The message identifier. Input parameter.
152	* @param icall The message parameters. Input/output parameter.	153	* @param icall The message parameters. Input/output parameter.
153	*/	154	*/
154	void arp_receiver( ipc_callid_t iid, ipc_call_t * icall );	155	void arp_receiver( ipc_callid_t iid, ipc_call_t * icall );
155		156
156	DEVICE_MAP_IMPLEMENT( arp_cache, arp_device_t )	157	DEVICE_MAP_IMPLEMENT( arp_cache, arp_device_t )
157		158
158	INT_MAP_IMPLEMENT( arp_protos, arp_proto_t )	159	INT_MAP_IMPLEMENT( arp_protos, arp_proto_t )
159		160
160	GENERIC_CHAR_MAP_IMPLEMENT( arp_addr, measured_string_t )	161	GENERIC_CHAR_MAP_IMPLEMENT( arp_addr, measured_string_t )
161		162
162	int arp_initialize( void ){	163	int arp_initialize( void ){
163	ERROR_DECLARE;	164	ERROR_DECLARE;
164		165
165	rwlock_initialize( & arp_globals.lock );	166	rwlock_initialize( & arp_globals.lock );
166	rwlock_write_lock( & arp_globals.lock );	167	rwlock_write_lock( & arp_globals.lock );
167	ERROR_PROPAGATE( arp_cache_initialize( & arp_globals.cache ));	168	ERROR_PROPAGATE( arp_cache_initialize( & arp_globals.cache ));
168	rwlock_write_unlock( & arp_globals.lock );	169	rwlock_write_unlock( & arp_globals.lock );
169	return EOK;	170	return EOK;
170	}	171	}
171		172
172	int arp_proto_create( arp_proto_ref * proto, services_t service, measured_string_ref address ){	173	int arp_proto_create( arp_proto_ref * proto, services_t service, measured_string_ref address ){
173	ERROR_DECLARE;	174	ERROR_DECLARE;
174		175
175	* proto = ( arp_proto_ref ) malloc( sizeof( arp_proto_t ));	176	* proto = ( arp_proto_ref ) malloc( sizeof( arp_proto_t ));
176	if( !( * proto )) return ENOMEM;	177	if( !( * proto )) return ENOMEM;
177	( ** proto ).service = service;	178	( ** proto ).service = service;
178	( ** proto ).addr = address;	179	( ** proto ).addr = address;
179	( ** proto ).addr_data = address->value;	180	( ** proto ).addr_data = address->value;
180	if( ERROR_OCCURRED( arp_addr_initialize( &( ** proto).addresses ))){	181	if( ERROR_OCCURRED( arp_addr_initialize( &( ** proto).addresses ))){
181	free( * proto );	182	free( * proto );
182	return ERROR_CODE;	183	return ERROR_CODE;
183	}	184	}
184	return EOK;	185	return EOK;
185	}	186	}
186		187
187	int arp_device_message( device_id_t device_id, services_t service, services_t protocol, measured_string_ref address ){	188	int arp_device_message( device_id_t device_id, services_t service, services_t protocol, measured_string_ref address ){
188	ERROR_DECLARE;	189	ERROR_DECLARE;
189		190
190	arp_device_ref device;	191	arp_device_ref device;
191	aid_t message;	192	aid_t message;
192	ipc_call_t answer;	193	ipc_call_t answer;
193	ipcarg_t result;	194	ipcarg_t result;
194	arp_proto_ref proto;	195	arp_proto_ref proto;
195	int index;	196	int index;
196		197
197	rwlock_write_lock( & arp_globals.lock );	198	rwlock_write_lock( & arp_globals.lock );
198	// an existing device?	199	// an existing device?
199	device = arp_cache_find( & arp_globals.cache, device_id );	200	device = arp_cache_find( & arp_globals.cache, device_id );
200	if( device ){	201	if( device ){
201	if( device->service != service ){	202	if( device->service != service ){
202	printf( "\nDevice %d already exists", device->device_id );	203	printf( "\nDevice %d already exists", device->device_id );
203	rwlock_write_unlock( & arp_globals.lock );	204	rwlock_write_unlock( & arp_globals.lock );
204	return EEXIST;	205	return EEXIST;
205	}	206	}
206	proto = arp_protos_find( & device->protos, protocol );	207	proto = arp_protos_find( & device->protos, protocol );
207	if( proto ){	208	if( proto ){
208	free( proto->addr );	209	free( proto->addr );
209	free( proto->addr_data );	210	free( proto->addr_data );
210	proto->addr = address;	211	proto->addr = address;
211	proto->addr_data = address->value;	212	proto->addr_data = address->value;
212	}else{	213	}else{
213	if( ERROR_OCCURRED( arp_proto_create( & proto, protocol, address ))){	214	if( ERROR_OCCURRED( arp_proto_create( & proto, protocol, address ))){
214	rwlock_write_unlock( & arp_globals.lock );	215	rwlock_write_unlock( & arp_globals.lock );
215	return ERROR_CODE;	216	return ERROR_CODE;
216	}	217	}
217	index = arp_protos_add( & device->protos, proto->service, proto );	218	index = arp_protos_add( & device->protos, proto->service, proto );
218	if( index < 0 ){	219	if( index < 0 ){
219	rwlock_write_unlock( & arp_globals.lock );	220	rwlock_write_unlock( & arp_globals.lock );
220	free( proto );	221	free( proto );
221	return result;	222	return result;
222	}	223	}
223	}	224	}
224	printf( "\nCache of the existing device %d cleaned", device->device_id );	225	printf( "\nCache of the existing device %d cleaned", device->device_id );
225	}else{	226	}else{
226	index = protocol_map( service, protocol );	227	index = hardware_map( service );
227	if( ! index ) return ENOENT;	228	if( ! index ) return ENOENT;
228	// create a new device	229	// create a new device
229	device = ( arp_device_ref ) malloc( sizeof( arp_device_t ));	230	device = ( arp_device_ref ) malloc( sizeof( arp_device_t ));
230	if( ! device ){	231	if( ! device ){
231	rwlock_write_unlock( & arp_globals.lock );	232	rwlock_write_unlock( & arp_globals.lock );
232	return ENOMEM;	233	return ENOMEM;
233	}	234	}
234	device->hardware = index;	235	device->hardware = index;
235	device->device_id = device_id;	236	device->device_id = device_id;
236	if( ERROR_OCCURRED( arp_protos_initialize( & device->protos ))	237	if( ERROR_OCCURRED( arp_protos_initialize( & device->protos ))
237	\|\| ERROR_OCCURRED( arp_proto_create( & proto, protocol, address ))){	238	\|\| ERROR_OCCURRED( arp_proto_create( & proto, protocol, address ))){
238	rwlock_write_unlock( & arp_globals.lock );	239	rwlock_write_unlock( & arp_globals.lock );
239	free( device );	240	free( device );
240	return ERROR_CODE;	241	return ERROR_CODE;
241	}	242	}
242	index = arp_protos_add( & device->protos, proto->service, proto );	243	index = arp_protos_add( & device->protos, proto->service, proto );
243	if( index < 0 ){	244	if( index < 0 ){
244	rwlock_write_unlock( & arp_globals.lock );	245	rwlock_write_unlock( & arp_globals.lock );
245	arp_protos_destroy( & device->protos );	246	arp_protos_destroy( & device->protos );
246	free( device );	247	free( device );
247	return index;	248	return index;
248	}	249	}
249	device->service = service;	250	device->service = service;
250	// bind the new one	251	// bind the new one
251	device->phone = bind_service( device->service, device->device_id, SERVICE_ARP, 0, arp_receiver );	252	device->phone = bind_service( device->service, device->device_id, SERVICE_ARP, 0, arp_receiver );
252	if( device->phone < 0 ){	253	if( device->phone < 0 ){
253	rwlock_write_unlock( & arp_globals.lock );	254	rwlock_write_unlock( & arp_globals.lock );
254	arp_protos_destroy( & device->protos );	255	arp_protos_destroy( & device->protos );
255	free( device );	256	free( device );
256	return EREFUSED;	257	return EREFUSED;
257	}	258	}
258	// get packet dimensions	259	// get packet dimensions
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 ))){	260	if( ERROR_OCCURRED( async_req_1_4( device->phone, NET_NIL_PACKET_SPACE, device_id, & device->addr_len, & device->prefix, & device->content, & device->suffix ))){
260	rwlock_write_unlock( & arp_globals.lock );	261	rwlock_write_unlock( & arp_globals.lock );
261	arp_protos_destroy( & device->protos );	262	arp_protos_destroy( & device->protos );
262	free( device );	263	free( device );
263	return ERROR_CODE;	264	return ERROR_CODE;
264	}	265	}
265	// get hardware address	266	// get hardware address
266	message = async_send_1( device->phone, NET_NIL_ADDR, device->device_id, & answer );	267	message = async_send_1( device->phone, NET_NIL_ADDR, device->device_id, & answer );
267	if( ERROR_OCCURRED( measured_strings_return( device->phone, & device->addr, & device->addr_data, 1 ))){	268	if( ERROR_OCCURRED( measured_strings_return( device->phone, & device->addr, & device->addr_data, 1 ))){
268	rwlock_write_unlock( & arp_globals.lock );	269	rwlock_write_unlock( & arp_globals.lock );
269	arp_protos_destroy( & device->protos );	270	arp_protos_destroy( & device->protos );
270	free( device );	271	free( device );
271	async_wait_for( message, NULL );	272	async_wait_for( message, NULL );
272	return ERROR_CODE;	273	return ERROR_CODE;
273	}	274	}
274	async_wait_for( message, & result );	275	async_wait_for( message, & result );
275	if( ERROR_OCCURRED( result )){	276	if( ERROR_OCCURRED( result )){
276	rwlock_write_unlock( & arp_globals.lock );	277	rwlock_write_unlock( & arp_globals.lock );
277	free( device->addr );	278	free( device->addr );
278	free( device->addr_data );	279	free( device->addr_data );
279	arp_protos_destroy( & device->protos );	280	arp_protos_destroy( & device->protos );
280	free( device );	281	free( device );
281	return ERROR_CODE;	282	return ERROR_CODE;
282	}	283	}
283	// get broadcast address	284	// get broadcast address
284	message = async_send_1( device->phone, NET_NIL_BROADCAST_ADDR, device->device_id, & answer );	285	message = async_send_1( device->phone, NET_NIL_BROADCAST_ADDR, device->device_id, & answer );
285	if( ERROR_OCCURRED( measured_strings_return( device->phone, & device->broadcast_addr, & device->broadcast_data, 1 ))){	286	if( ERROR_OCCURRED( measured_strings_return( device->phone, & device->broadcast_addr, & device->broadcast_data, 1 ))){
286	rwlock_write_unlock( & arp_globals.lock );	287	rwlock_write_unlock( & arp_globals.lock );
287	free( device->addr );	288	free( device->addr );
288	free( device->addr_data );	289	free( device->addr_data );
289	arp_protos_destroy( & device->protos );	290	arp_protos_destroy( & device->protos );
290	free( device );	291	free( device );
291	async_wait_for( message, NULL );	292	async_wait_for( message, NULL );
292	return ERROR_CODE;	293	return ERROR_CODE;
293	}	294	}
294	async_wait_for( message, & result );	295	async_wait_for( message, & result );
295	// add to the cache	296	// add to the cache
296	if( ERROR_OCCURRED( result )	297	if( ERROR_OCCURRED( result )
297	\|\| ERROR_OCCURRED( arp_cache_add( & arp_globals.cache, device->device_id, device ))){	298	\|\| ERROR_OCCURRED( arp_cache_add( & arp_globals.cache, device->device_id, device ))){
298	rwlock_write_unlock( & arp_globals.lock );	299	rwlock_write_unlock( & arp_globals.lock );
299	free( device->addr );	300	free( device->addr );
300	free( device->addr_data );	301	free( device->addr_data );
301	free( device->broadcast_addr );	302	free( device->broadcast_addr );
302	free( device->broadcast_data );	303	free( device->broadcast_data );
303	arp_protos_destroy( & device->protos );	304	arp_protos_destroy( & device->protos );
304	free( device );	305	free( device );
305	return ERROR_CODE;	306	return ERROR_CODE;
306	}	307	}
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 );	308	printf( "\nNew device registered:\n\tid\t= %d\n\ttype\t= 0x%x\n\tservice\t= %d", device->device_id, device->hardware, device->service );
308	}	309	}
309	rwlock_write_unlock( & arp_globals.lock );	310	rwlock_write_unlock( & arp_globals.lock );
310	return EOK;	311	return EOK;
311	}	312	}
312		313
313	measured_string_ref arp_translate_message( device_id_t device_id, services_t protocol, measured_string_ref target ){	314	measured_string_ref arp_translate_message( device_id_t device_id, services_t protocol, measured_string_ref target ){
314	arp_device_ref device;	315	arp_device_ref device;
315	arp_proto_ref proto;	316	arp_proto_ref proto;
316	measured_string_ref addr;	317	measured_string_ref addr;
317	size_t length;	318	size_t length;
318	packet_t packet;	319	packet_t packet;
319	arp_header_ref header;	320	arp_header_ref header;
320		321
321	if( ! target ) return NULL;	322	if( ! target ) return NULL;
322	rwlock_read_lock( & arp_globals.lock );	-
323	device = arp_cache_find( & arp_globals.cache, device_id );	323	device = arp_cache_find( & arp_globals.cache, device_id );
324	if( ! device ){	324	if( ! device ) return NULL;
325	rwlock_read_unlock( & arp_globals.lock );	-
326	return NULL;	-
327	}	-
328	proto = arp_protos_find( & device->protos, protocol );	325	proto = arp_protos_find( & device->protos, protocol );
329	if(( ! proto ) \|\| ( proto->addr->length != target->length )){	326	if(( ! proto ) \|\| ( proto->addr->length != target->length )) return NULL;
330	rwlock_read_unlock( & arp_globals.lock );	-
331	return NULL;	-
332	}	-
333	addr = arp_addr_find( & proto->addresses, target->value, target->length );	327	addr = arp_addr_find( & proto->addresses, target->value, target->length );
334	if( addr ){	-
335	rwlock_read_unlock( & arp_globals.lock );	-
336	return addr;	328	if( addr ) return addr;
337	}	-
338	// ARP packet content size = header + ( address + translation ) * 2	329	// ARP packet content size = header + ( address + translation ) * 2
339	length = 8 + ( CONVERT_SIZE( char, uint8_t, proto->addr->length ) + CONVERT_SIZE( char, uint8_t, device->addr->length )) * 2;	330	length = 8 + ( CONVERT_SIZE( char, uint8_t, proto->addr->length ) + CONVERT_SIZE( char, uint8_t, device->addr->length )) * 2;
340	if( length > device->content ){	331	if( length > device->content ) return NULL;
341	rwlock_read_unlock( & arp_globals.lock );	-
342	return NULL;	-
343	}	-
344	packet = packet_get_4( arp_globals.networking_phone, device->addr_len, device->prefix, length, device->suffix );	332	packet = packet_get_4( arp_globals.networking_phone, device->addr_len, device->prefix, length, device->suffix );
345	if( ! packet ){	333	if( ! packet ) return NULL;
346	rwlock_read_unlock( & arp_globals.lock );	-
347	return NULL;	-
348	}	-
349	header = ( arp_header_ref ) packet_suffix( packet, length );	334	header = ( arp_header_ref ) packet_suffix( packet, length );
350	header->hardware = device->hardware;	335	header->hardware = htons( device->hardware );
351	header->hardware_length = device->addr->length;	336	header->hardware_length = device->addr->length;
352	header->protocol = protocol_map( device->service, protocol );	337	header->protocol = htons( protocol_map( device->service, protocol ));
353	header->protocol_length = proto->addr->length;	338	header->protocol_length = proto->addr->length;
354	header->operation = ARPOP_REQUEST;	339	header->operation = htons( ARPOP_REQUEST );
355	length = sizeof( arp_header_t );	340	length = sizeof( arp_header_t );
356	memcpy((( uint8_t * ) header ) + length, device->addr->value, device->addr->length );	341	memcpy((( uint8_t * ) header ) + length, device->addr->value, device->addr->length );
357	length += device->addr->length;	342	length += device->addr->length;
358	memcpy((( uint8_t * ) header ) + length, proto->addr->value, proto->addr->length );	343	memcpy((( uint8_t * ) header ) + length, proto->addr->value, proto->addr->length );
359	length += proto->addr->length;	344	length += proto->addr->length;
360	bzero((( uint8_t * ) header ) + length, device->addr->length );	345	bzero((( uint8_t * ) header ) + length, device->addr->length );
361	length += device->addr->length;	346	length += device->addr->length;
362	memcpy((( uint8_t * ) header ) + length, target->value, target->length );	347	memcpy((( uint8_t * ) header ) + length, target->value, target->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 ));	348	packet_set_addr( packet, ( uint8_t * ) device->addr->value, ( uint8_t * ) device->broadcast_addr->value, CONVERT_SIZE( char, uint8_t, device->addr->length ));
364	async_msg_3( device->phone, NET_NETIF_SEND, device_id, SERVICE_ARP, packet_get_id( packet ));	349	async_msg_3( device->phone, NET_NIL_SEND, device_id, packet_get_id( packet ), SERVICE_ARP );
365	rwlock_read_unlock( & arp_globals.lock );	-
366	return NULL;	350	return NULL;
367	}	351	}
368		352
369	int arp_receive_message( device_id_t device_id, packet_t packet ){	353	int arp_receive_message( device_id_t device_id, packet_t packet ){
370	ERROR_DECLARE;	354	ERROR_DECLARE;
371		355
372	size_t length;	356	size_t length;
373	arp_header_ref header;	357	arp_header_ref header;
374	arp_device_ref device;	358	arp_device_ref device;
375	arp_proto_ref proto;	359	arp_proto_ref proto;
376	measured_string_ref hw_source;	360	measured_string_ref hw_source;
377	uint8_t * src_hw;	361	uint8_t * src_hw;
378	uint8_t * src_proto;	362	uint8_t * src_proto;
379	uint8_t * des_hw;	363	uint8_t * des_hw;
380	uint8_t * des_proto;	364	uint8_t * des_proto;
381		365
382	length = packet_get_data_length( packet );	366	length = packet_get_data_length( packet );
383	if( length <= sizeof( arp_header_t )) return EINVAL;	367	if( length <= sizeof( arp_header_t )) return EINVAL;
384	rwlock_read_lock( & arp_globals.lock );	-
385	device = arp_cache_find( & arp_globals.cache, device_id );	368	device = arp_cache_find( & arp_globals.cache, device_id );
386	if( ! device ){	-
387	rwlock_read_unlock( & arp_globals.lock );	-
388	return ENOENT;	369	if( ! device ) return ENOENT;
389	}	-
390	header = ( arp_header_ref ) packet_get_data( packet );	370	header = ( arp_header_ref ) packet_get_data( packet );
391	if(( header->hardware != device->hardware )	371	if(( ntohs( header->hardware ) != device->hardware )
392	\|\| ( length < sizeof( arp_header_t ) + ( header->hardware_length + header->protocol_length ) * 2 )){	372	\|\| ( length < sizeof( arp_header_t ) + ( header->hardware_length + header->protocol_length ) * 2 )){
393	rwlock_read_unlock( & arp_globals.lock );	-
394	return EINVAL;	373	return EINVAL;
395	}	374	}
396	proto = arp_protos_find( & device->protos, protocol_unmap( device->service, header->protocol ));	375	proto = arp_protos_find( & device->protos, protocol_unmap( device->service, ntohs( header->protocol )));
397	if( ! proto ){	-
398	rwlock_read_unlock( & arp_globals.lock );	-
399	return ENOENT;	376	if( ! proto ) return ENOENT;
400	}	-
401	src_hw = (( uint8_t * ) header ) + sizeof( arp_header_t );	377	src_hw = (( uint8_t * ) header ) + sizeof( arp_header_t );
402	src_proto = src_hw + header->hardware_length;	378	src_proto = src_hw + header->hardware_length;
403	des_hw = src_proto + header->protocol_length;	379	des_hw = src_proto + header->protocol_length;
404	des_proto = des_hw + header->hardware_length;	380	des_proto = des_hw + header->hardware_length;
405	hw_source = arp_addr_find( & proto->addresses, ( char * ) src_proto, CONVERT_SIZE( uint8_t, char, header->protocol_length ));	381	hw_source = arp_addr_find( & proto->addresses, ( char * ) src_proto, CONVERT_SIZE( uint8_t, char, header->protocol_length ));
406	// exists?	382	// exists?
407	if( hw_source ){	383	if( hw_source ){
408	if( hw_source->length != CONVERT_SIZE( uint8_t, char, header->hardware_length )){	384	if( hw_source->length != CONVERT_SIZE( uint8_t, char, header->hardware_length )){
409	rwlock_read_unlock( & arp_globals.lock );	-
410	return EINVAL;	385	return EINVAL;
411	}	386	}
412	memcpy( hw_source->value, src_hw, hw_source->length );	387	memcpy( hw_source->value, src_hw, hw_source->length );
413	}	388	}
414	// is my protocol address?	389	// is my protocol address?
415	if( proto->addr->length != CONVERT_SIZE( uint8_t, char, header->hardware_length )){	390	if( proto->addr->length != CONVERT_SIZE( uint8_t, char, header->hardware_length )){
416	rwlock_read_unlock( & arp_globals.lock );	-
417	return EINVAL;	391	return EINVAL;
418	}	392	}
419	if( ! strncmp( proto->addr->value, ( char * ) des_proto, proto->addr->length )){	393	if( ! strncmp( proto->addr->value, ( char * ) des_proto, proto->addr->length )){
420	// not already upadted?	394	// not already upadted?
421	if( ! hw_source ){	395	if( ! hw_source ){
422	hw_source = measured_string_create_bulk(( char * ) src_hw, CONVERT_SIZE( uint8_t, char, header->hardware_length ));	396	hw_source = measured_string_create_bulk(( char * ) src_hw, CONVERT_SIZE( uint8_t, char, header->hardware_length ));
423	if( ! hw_source ){	397	if( ! hw_source ) return ENOMEM;
424	rwlock_read_unlock( & arp_globals.lock );	-
425	return ENOMEM;	-
426	}	-
427	if( ERROR_OCCURRED( arp_addr_add( & proto->addresses, ( char * ) src_proto, CONVERT_SIZE( uint8_t, char, header->protocol_length ), hw_source ))){	398	ERROR_PROPAGATE( arp_addr_add( & proto->addresses, ( char * ) src_proto, CONVERT_SIZE( uint8_t, char, header->protocol_length ), hw_source ));
428	rwlock_read_unlock( & arp_globals.lock );	-
429	return ERROR_CODE;	-
430	}	-
431	}	399	}
432	if( header->operation == ARPOP_REQUEST ){	400	if( ntohs( header->operation ) == ARPOP_REQUEST ){
433	header->operation = ARPOP_REPLY;	401	header->operation = htons( ARPOP_REPLY );
434	memcpy( des_proto, src_proto, header->protocol_length );	402	memcpy( des_proto, src_proto, header->protocol_length );
435	memcpy( src_proto, proto->addr->value, header->protocol_length );	403	memcpy( src_proto, proto->addr->value, header->protocol_length );
436	memcpy( src_hw, des_hw, header->hardware_length );	404	memcpy( src_hw, des_hw, header->hardware_length );
437	memcpy( des_hw, hw_source->value, header->hardware_length );	405	memcpy( des_hw, hw_source->value, header->hardware_length );
438	packet_set_addr( packet, src_hw, des_hw, header->hardware_length );	406	packet_set_addr( packet, src_hw, des_hw, header->hardware_length );
439	async_msg_3( device->phone, NET_NETIF_SEND, device_id, SERVICE_ARP, packet_get_id( packet ));	407	async_msg_3( device->phone, NET_NIL_SEND, device_id, packet_get_id( packet ), SERVICE_ARP );
440	rwlock_read_unlock( & arp_globals.lock );	-
441	}else{	408	}else{
442	rwlock_read_unlock( & arp_globals.lock );	-
443	pq_release( arp_globals.networking_phone, packet_get_id( packet ));	409	pq_release( arp_globals.networking_phone, packet_get_id( packet ));
444	}	410	}
445	}	411	}
446	return EOK;	412	return EOK;
447	}	413	}
448		414
449	int arp_clear_device_message( device_id_t device_id ){	415	int arp_clear_device_message( device_id_t device_id ){
450	arp_device_ref device;	416	arp_device_ref device;
451		417
452	rwlock_write_lock( & arp_globals.lock );	418	rwlock_write_lock( & arp_globals.lock );
453	device = arp_cache_find( & arp_globals.cache, device_id );	419	device = arp_cache_find( & arp_globals.cache, device_id );
454	if( ! device ){	420	if( ! device ){
455	rwlock_write_unlock( & arp_globals.lock );	421	rwlock_write_unlock( & arp_globals.lock );
456	return ENOENT;	422	return ENOENT;
457	}	423	}
458	clear_device( device );	424	clear_device( device );
459	printf( "\nDevice %d cleared", device_id );	425	printf( "\nDevice %d cleared", device_id );
460	rwlock_write_unlock( & arp_globals.lock );	426	rwlock_write_unlock( & arp_globals.lock );
461	return EOK;	427	return EOK;
462	}	428	}
463		429
464	void clear_device( arp_device_ref device ){	430	void clear_device( arp_device_ref device ){
465	int count;	431	int count;
466	arp_proto_ref proto;	432	arp_proto_ref proto;
467		433
468	for( count = arp_protos_count( & device->protos ) - 1; count >= 0; -- count ){	434	for( count = arp_protos_count( & device->protos ) - 1; count >= 0; -- count ){
469	proto = arp_protos_get_index( & device->protos, count );	435	proto = arp_protos_get_index( & device->protos, count );
470	if( proto ){	436	if( proto ){
471	if( proto->addr ) free( proto->addr );	437	if( proto->addr ) free( proto->addr );
472	if( proto->addr_data ) free( proto->addr_data );	438	if( proto->addr_data ) free( proto->addr_data );
473	arp_addr_destroy( & proto->addresses );	439	arp_addr_destroy( & proto->addresses );
474	}	440	}
475	}	441	}
476	arp_protos_clear( & device->protos );	442	arp_protos_clear( & device->protos );
477	}	443	}
478		444
479	int arp_clean_cache_message( void ){	445	int arp_clean_cache_message( void ){
480	int count;	446	int count;
481	arp_device_ref device;	447	arp_device_ref device;
482		448
483	rwlock_write_lock( & arp_globals.lock );	449	rwlock_write_lock( & arp_globals.lock );
484	for( count = arp_cache_count( & arp_globals.cache ) - 1; count >= 0; -- count ){	450	for( count = arp_cache_count( & arp_globals.cache ) - 1; count >= 0; -- count ){
485	device = arp_cache_get_index( & arp_globals.cache, count );	451	device = arp_cache_get_index( & arp_globals.cache, count );
486	if( device ){	452	if( device ){
487	clear_device( device );	453	clear_device( device );
488	if( device->addr_data ) free( device->addr_data );	454	if( device->addr_data ) free( device->addr_data );
489	if( device->broadcast_data ) free( device->broadcast_data );	455	if( device->broadcast_data ) free( device->broadcast_data );
490	}	456	}
491	}	457	}
492	arp_cache_clear( & arp_globals.cache );	458	arp_cache_clear( & arp_globals.cache );
493	rwlock_write_unlock( & arp_globals.lock );	459	rwlock_write_unlock( & arp_globals.lock );
494	printf( "\nCache cleaned" );	460	printf( "\nCache cleaned" );
495	return EOK;	461	return EOK;
496	}	462	}
497		463
498	int arp_message( ipc_callid_t callid, ipc_call_t * call, ipc_call_t * answer, int * answer_count ){	464	int arp_message( ipc_callid_t callid, ipc_call_t * call, ipc_call_t * answer, int * answer_count ){

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(root)/branches/network/uspace/srv/net/il/arp/arp.c – Rev 4192 → 4243