Changeset a64c64d in mainline for uspace/srv/net/il/arp/arp.c


Ignore:
Timestamp:
2010-03-09T22:24:31Z (15 years ago)
Author:
Lukas Mejdrech <lukasmejdrech@…>
Branches:
lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export
Children:
74520daf
Parents:
9f2ea28
Message:
  • code reorganization (no functional change)
File:
1 edited

Legend:

Unmodified
Added
Removed

  • uspace/srv/net/il/arp/arp.c

    r9f2ea28 ra64c64d  
    7373arp_globals_t   arp_globals;
    7474
     75/** Clears the device specific data.
     76 *  @param[in] device The device specific data.
     77 */
     78void arp_clear_device(arp_device_ref device);
     79
    7580/** Creates new protocol specific data.
    7681 *  Allocates and returns the needed memory block as the proto parameter.
    … …  
    8287 */
    8388int arp_proto_create(arp_proto_ref * proto, services_t service, measured_string_ref address);
    84 
    85 /** Clears the device specific data.
    86  *  @param[in] device The device specific data.
    87  */
    88 void arp_clear_device(arp_device_ref device);
    8989
    9090/** @name Message processing functions
    … …  
    105105int arp_device_message(device_id_t device_id, services_t service, services_t protocol, measured_string_ref address);
    106106
    107 /** Returns the hardware address for the given protocol address.
    108  *  Sends the ARP request packet if the hardware address is not found in the cache.
     107/** Updates the device content length according to the new MTU value.
    109108 *  @param[in] device_id The device identifier.
    110  *  @param[in] protocol The protocol service.
    111  *  @param[in] target The target protocol address.
    112  *  @returns The hardware address of the target.
    113  *  @returns NULL if the target parameter is NULL.
    114  *  @returns NULL if the device is not found.
    115  *  @returns NULL if the device packet is too small to send a&nbsp;request.
    116  *  @returns NULL if the hardware address is not found in the cache.
    117  */
    118 measured_string_ref arp_translate_message(device_id_t device_id, services_t protocol, measured_string_ref target);
     109 *  @param[in] mtu The new mtu value.
     110 *  @returns ENOENT if device is not found.
     111 *  @returns EOK on success.
     112 */
     113int arp_mtu_changed_message(device_id_t device_id, size_t mtu);
    119114
    120115/** Processes the received ARP packet.
    … …  
    133128int arp_receive_message(device_id_t device_id, packet_t packet);
    134129
    135 /** Updates the device content length according to the new MTU value.
     130/** Returns the hardware address for the given protocol address.
     131 *  Sends the ARP request packet if the hardware address is not found in the cache.
    136132 *  @param[in] device_id The device identifier.
    137  *  @param[in] mtu The new mtu value.
    138  *  @returns ENOENT if device is not found.
    139  *  @returns EOK on success.
    140  */
    141 int arp_mtu_changed_message(device_id_t device_id, size_t mtu);
     133 *  @param[in] protocol The protocol service.
     134 *  @param[in] target The target protocol address.
     135 *  @returns The hardware address of the target.
     136 *  @returns NULL if the target parameter is NULL.
     137 *  @returns NULL if the device is not found.
     138 *  @returns NULL if the device packet is too small to send a&nbsp;request.
     139 *  @returns NULL if the hardware address is not found in the cache.
     140 */
     141measured_string_ref arp_translate_message(device_id_t device_id, services_t protocol, measured_string_ref target);
    142142
    143143/*@}*/
    … …  
    148148
    149149GENERIC_CHAR_MAP_IMPLEMENT(arp_addr, measured_string_t)
    150 
    151 task_id_t arp_task_get_id(void){
    152         return task_get_id();
    153 }
    154 
    155 int arp_clear_device_req(int arp_phone, device_id_t device_id){
    156         arp_device_ref device;
    157 
    158         fibril_rwlock_write_lock(&arp_globals.lock);
    159         device = arp_cache_find(&arp_globals.cache, device_id);
    160         if(! device){
    161                 fibril_rwlock_write_unlock(&arp_globals.lock);
    162                 return ENOENT;
    163         }
    164         arp_clear_device(device);
    165         printf("Device %d cleared\n", device_id);
    166         fibril_rwlock_write_unlock(&arp_globals.lock);
    167         return EOK;
    168 }
    169 
    170 int arp_clear_address_req(int arp_phone, device_id_t device_id, services_t protocol, measured_string_ref address){
    171         arp_device_ref device;
    172         arp_proto_ref proto;
    173 
    174         fibril_rwlock_write_lock(&arp_globals.lock);
    175         device = arp_cache_find(&arp_globals.cache, device_id);
    176         if(! device){
    177                 fibril_rwlock_write_unlock(&arp_globals.lock);
    178                 return ENOENT;
    179         }
    180         proto = arp_protos_find(&device->protos, protocol);
    181         if(! proto){
    182                 fibril_rwlock_write_unlock(&arp_globals.lock);
    183                 return ENOENT;
    184         }
    185         arp_addr_exclude(&proto->addresses, address->value, address->length);
    186         fibril_rwlock_write_unlock(&arp_globals.lock);
    187         return EOK;
    188 }
    189150
    190151int arp_clean_cache_req(int arp_phone){
    … …  
    211172}
    212173
    213 int arp_device_req(int arp_phone, device_id_t device_id, services_t protocol, services_t netif, measured_string_ref address){
    214         ERROR_DECLARE;
    215 
    216         measured_string_ref tmp;
    217 
    218         // copy the given address for exclusive use
    219         tmp = measured_string_copy(address);
    220         if(ERROR_OCCURRED(arp_device_message(device_id, netif, protocol, tmp))){
    221                 free(tmp->value);
    222                 free(tmp);
    223         }
    224         return ERROR_CODE;
    225 }
    226 
    227 int arp_translate_req(int arp_phone, device_id_t device_id, services_t protocol, measured_string_ref address, measured_string_ref * translation, char ** data){
    228         measured_string_ref tmp;
    229 
    230         fibril_rwlock_read_lock(&arp_globals.lock);
    231         tmp = arp_translate_message(device_id, protocol, address);
    232         if(tmp){
    233                 *translation = measured_string_copy(tmp);
    234                 fibril_rwlock_read_unlock(&arp_globals.lock);
    235                 if(*translation){
    236                         *data = (** translation).value;
    237                         return EOK;
    238                 }else{
    239                         return ENOMEM;
    240                 }
    241         }else{
    242                 fibril_rwlock_read_unlock(&arp_globals.lock);
     174int arp_clear_address_req(int arp_phone, device_id_t device_id, services_t protocol, measured_string_ref address){
     175        arp_device_ref device;
     176        arp_proto_ref proto;
     177
     178        fibril_rwlock_write_lock(&arp_globals.lock);
     179        device = arp_cache_find(&arp_globals.cache, device_id);
     180        if(! device){
     181                fibril_rwlock_write_unlock(&arp_globals.lock);
    243182                return ENOENT;
    244183        }
    245 }
    246 
    247 int arp_initialize(async_client_conn_t client_connection){
    248         ERROR_DECLARE;
    249 
    250         fibril_rwlock_initialize(&arp_globals.lock);
     184        proto = arp_protos_find(&device->protos, protocol);
     185        if(! proto){
     186                fibril_rwlock_write_unlock(&arp_globals.lock);
     187                return ENOENT;
     188        }
     189        arp_addr_exclude(&proto->addresses, address->value, address->length);
     190        fibril_rwlock_write_unlock(&arp_globals.lock);
     191        return EOK;
     192}
     193
     194void arp_clear_device(arp_device_ref device){
     195        int count;
     196        arp_proto_ref proto;
     197
     198        for(count = arp_protos_count(&device->protos) - 1; count >= 0; -- count){
     199                proto = arp_protos_get_index(&device->protos, count);
     200                if(proto){
     201                        if(proto->addr){
     202                                free(proto->addr);
     203                        }
     204                        if(proto->addr_data){
     205                                free(proto->addr_data);
     206                        }
     207                        arp_addr_destroy(&proto->addresses);
     208                }
     209        }
     210        arp_protos_clear(&device->protos);
     211}
     212
     213int arp_clear_device_req(int arp_phone, device_id_t device_id){
     214        arp_device_ref device;
     215
    251216        fibril_rwlock_write_lock(&arp_globals.lock);
    252         arp_globals.client_connection = client_connection;
    253         ERROR_PROPAGATE(arp_cache_initialize(&arp_globals.cache));
     217        device = arp_cache_find(&arp_globals.cache, device_id);
     218        if(! device){
     219                fibril_rwlock_write_unlock(&arp_globals.lock);
     220                return ENOENT;
     221        }
     222        arp_clear_device(device);
     223        printf("Device %d cleared\n", device_id);
    254224        fibril_rwlock_write_unlock(&arp_globals.lock);
    255225        return EOK;
    256226}
    257227
    258 int arp_proto_create(arp_proto_ref * proto, services_t service, measured_string_ref address){
    259         ERROR_DECLARE;
    260 
    261         *proto = (arp_proto_ref) malloc(sizeof(arp_proto_t));
    262         if(!(*proto)){
    263                 return ENOMEM;
    264         }
    265         (** proto).service = service;
    266         (** proto).addr = address;
    267         (** proto).addr_data = address->value;
    268         if(ERROR_OCCURRED(arp_addr_initialize(&(** proto).addresses))){
    269                 free(*proto);
    270                 return ERROR_CODE;
     228int arp_connect_module(services_t service){
     229        if(service != SERVICE_ARP){
     230                return EINVAL;
    271231        }
    272232        return EOK;
    … …  
    383343}
    384344
    385 measured_string_ref arp_translate_message(device_id_t device_id, services_t protocol, measured_string_ref target){
    386         arp_device_ref device;
    387         arp_proto_ref proto;
    388         measured_string_ref addr;
    389         size_t length;
    390         packet_t packet;
    391         arp_header_ref header;
    392 
    393         if(! target){
    394                 return NULL;
    395         }
    396         device = arp_cache_find(&arp_globals.cache, device_id);
    397         if(! device){
    398                 return NULL;
    399         }
    400         proto = arp_protos_find(&device->protos, protocol);
    401         if((! proto) || (proto->addr->length != target->length)){
    402                 return NULL;
    403         }
    404         addr = arp_addr_find(&proto->addresses, target->value, target->length);
    405         if(addr){
    406                 return addr;
    407         }
    408         // ARP packet content size = header + (address + translation) * 2
    409         length = 8 + (CONVERT_SIZE(char, uint8_t, proto->addr->length) + CONVERT_SIZE(char, uint8_t, device->addr->length)) * 2;
    410         if(length > device->packet_dimension.content){
    411                 return NULL;
    412         }
    413         packet = packet_get_4(arp_globals.net_phone, device->packet_dimension.addr_len, device->packet_dimension.prefix, length, device->packet_dimension.suffix);
    414         if(! packet){
    415                 return NULL;
    416         }
    417         header = (arp_header_ref) packet_suffix(packet, length);
    418         if(! header){
    419                 pq_release(arp_globals.net_phone, packet_get_id(packet));
    420                 return NULL;
    421         }
    422         header->hardware = htons(device->hardware);
    423         header->hardware_length = (uint8_t) device->addr->length;
    424         header->protocol = htons(protocol_map(device->service, protocol));
    425         header->protocol_length = (uint8_t) proto->addr->length;
    426         header->operation = htons(ARPOP_REQUEST);
    427         length = sizeof(arp_header_t);
    428         memcpy(((uint8_t *) header) + length, device->addr->value, device->addr->length);
    429         length += device->addr->length;
    430         memcpy(((uint8_t *) header) + length, proto->addr->value, proto->addr->length);
    431         length += proto->addr->length;
    432         bzero(((uint8_t *) header) + length, device->addr->length);
    433         length += device->addr->length;
    434         memcpy(((uint8_t *) header) + length, target->value, target->length);
    435         if(packet_set_addr(packet, (uint8_t *) device->addr->value, (uint8_t *) device->broadcast_addr->value, CONVERT_SIZE(char, uint8_t, device->addr->length)) != EOK){
    436                 pq_release(arp_globals.net_phone, packet_get_id(packet));
    437                 return NULL;
    438         }
    439         nil_send_msg(device->phone, device_id, packet, SERVICE_ARP);
    440         return NULL;
    441 }
    442 
    443 int arp_receive_message(device_id_t device_id, packet_t packet){
     345int arp_device_req(int arp_phone, device_id_t device_id, services_t protocol, services_t netif, measured_string_ref address){
    444346        ERROR_DECLARE;
    445347
    446         size_t length;
    447         arp_header_ref header;
    448         arp_device_ref device;
    449         arp_proto_ref proto;
    450         measured_string_ref hw_source;
    451         uint8_t * src_hw;
    452         uint8_t * src_proto;
    453         uint8_t * des_hw;
    454         uint8_t * des_proto;
    455 
    456         length = packet_get_data_length(packet);
    457         if(length <= sizeof(arp_header_t)){
    458                 return EINVAL;
    459         }
    460         device = arp_cache_find(&arp_globals.cache, device_id);
    461         if(! device){
    462                 return ENOENT;
    463         }
    464         header = (arp_header_ref) packet_get_data(packet);
    465         if((ntohs(header->hardware) != device->hardware)
    466                 || (length < sizeof(arp_header_t) + header->hardware_length * 2u + header->protocol_length * 2u)){
    467                 return EINVAL;
    468         }
    469         proto = arp_protos_find(&device->protos, protocol_unmap(device->service, ntohs(header->protocol)));
    470         if(! proto){
    471                 return ENOENT;
    472         }
    473         src_hw = ((uint8_t *) header) + sizeof(arp_header_t);
    474         src_proto = src_hw + header->hardware_length;
    475         des_hw = src_proto + header->protocol_length;
    476         des_proto = des_hw + header->hardware_length;
    477         hw_source = arp_addr_find(&proto->addresses, (char *) src_proto, CONVERT_SIZE(uint8_t, char, header->protocol_length));
    478         // exists?
    479         if(hw_source){
    480                 if(hw_source->length != CONVERT_SIZE(uint8_t, char, header->hardware_length)){
    481                         return EINVAL;
    482                 }
    483                 memcpy(hw_source->value, src_hw, hw_source->length);
    484         }
    485         // is my protocol address?
    486         if(proto->addr->length != CONVERT_SIZE(uint8_t, char, header->protocol_length)){
    487                 return EINVAL;
    488         }
    489         if(! str_lcmp(proto->addr->value, (char *) des_proto, proto->addr->length)){
    490                 // not already upadted?
    491                 if(! hw_source){
    492                         hw_source = measured_string_create_bulk((char *) src_hw, CONVERT_SIZE(uint8_t, char, header->hardware_length));
    493                         if(! hw_source){
    494                                 return ENOMEM;
    495                         }
    496                         ERROR_PROPAGATE(arp_addr_add(&proto->addresses, (char *) src_proto, CONVERT_SIZE(uint8_t, char, header->protocol_length), hw_source));
    497                 }
    498                 if(ntohs(header->operation) == ARPOP_REQUEST){
    499                         header->operation = htons(ARPOP_REPLY);
    500                         memcpy(des_proto, src_proto, header->protocol_length);
    501                         memcpy(src_proto, proto->addr->value, header->protocol_length);
    502                         memcpy(src_hw, device->addr->value, device->packet_dimension.addr_len);
    503                         memcpy(des_hw, hw_source->value, header->hardware_length);
    504                         ERROR_PROPAGATE(packet_set_addr(packet, src_hw, des_hw, header->hardware_length));
    505                         nil_send_msg(device->phone, device_id, packet, SERVICE_ARP);
    506                         return 1;
    507                 }
    508         }
    509         return EOK;
    510 }
    511 
    512 void arp_clear_device(arp_device_ref device){
    513         int count;
    514         arp_proto_ref proto;
    515 
    516         for(count = arp_protos_count(&device->protos) - 1; count >= 0; -- count){
    517                 proto = arp_protos_get_index(&device->protos, count);
    518                 if(proto){
    519                         if(proto->addr){
    520                                 free(proto->addr);
    521                         }
    522                         if(proto->addr_data){
    523                                 free(proto->addr_data);
    524                         }
    525                         arp_addr_destroy(&proto->addresses);
    526                 }
    527         }
    528         arp_protos_clear(&device->protos);
    529 }
    530 
    531 int arp_connect_module(services_t service){
    532         if(service != SERVICE_ARP){
    533                 return EINVAL;
    534         }
    535         return EOK;
    536 }
    537 
    538 int arp_mtu_changed_message(device_id_t device_id, size_t mtu){
    539         arp_device_ref device;
    540 
     348        measured_string_ref tmp;
     349
     350        // copy the given address for exclusive use
     351        tmp = measured_string_copy(address);
     352        if(ERROR_OCCURRED(arp_device_message(device_id, netif, protocol, tmp))){
     353                free(tmp->value);
     354                free(tmp);
     355        }
     356        return ERROR_CODE;
     357}
     358
     359int arp_initialize(async_client_conn_t client_connection){
     360        ERROR_DECLARE;
     361
     362        fibril_rwlock_initialize(&arp_globals.lock);
    541363        fibril_rwlock_write_lock(&arp_globals.lock);
    542         device = arp_cache_find(&arp_globals.cache, device_id);
    543         if(! device){
    544                 fibril_rwlock_write_unlock(&arp_globals.lock);
    545                 return ENOENT;
    546         }
    547         device->packet_dimension.content = mtu;
    548         printf("arp - device %d changed mtu to %d\n\n", device_id, mtu);
     364        arp_globals.client_connection = client_connection;
     365        ERROR_PROPAGATE(arp_cache_initialize(&arp_globals.cache));
    549366        fibril_rwlock_write_unlock(&arp_globals.lock);
    550367        return EOK;
    … …  
    618435}
    619436
     437int arp_mtu_changed_message(device_id_t device_id, size_t mtu){
     438        arp_device_ref device;
     439
     440        fibril_rwlock_write_lock(&arp_globals.lock);
     441        device = arp_cache_find(&arp_globals.cache, device_id);
     442        if(! device){
     443                fibril_rwlock_write_unlock(&arp_globals.lock);
     444                return ENOENT;
     445        }
     446        device->packet_dimension.content = mtu;
     447        printf("arp - device %d changed mtu to %d\n\n", device_id, mtu);
     448        fibril_rwlock_write_unlock(&arp_globals.lock);
     449        return EOK;
     450}
     451
     452int arp_proto_create(arp_proto_ref * proto, services_t service, measured_string_ref address){
     453        ERROR_DECLARE;
     454
     455        *proto = (arp_proto_ref) malloc(sizeof(arp_proto_t));
     456        if(!(*proto)){
     457                return ENOMEM;
     458        }
     459        (** proto).service = service;
     460        (** proto).addr = address;
     461        (** proto).addr_data = address->value;
     462        if(ERROR_OCCURRED(arp_addr_initialize(&(** proto).addresses))){
     463                free(*proto);
     464                return ERROR_CODE;
     465        }
     466        return EOK;
     467}
     468
     469int arp_receive_message(device_id_t device_id, packet_t packet){
     470        ERROR_DECLARE;
     471
     472        size_t length;
     473        arp_header_ref header;
     474        arp_device_ref device;
     475        arp_proto_ref proto;
     476        measured_string_ref hw_source;
     477        uint8_t * src_hw;
     478        uint8_t * src_proto;
     479        uint8_t * des_hw;
     480        uint8_t * des_proto;
     481
     482        length = packet_get_data_length(packet);
     483        if(length <= sizeof(arp_header_t)){
     484                return EINVAL;
     485        }
     486        device = arp_cache_find(&arp_globals.cache, device_id);
     487        if(! device){
     488                return ENOENT;
     489        }
     490        header = (arp_header_ref) packet_get_data(packet);
     491        if((ntohs(header->hardware) != device->hardware)
     492                || (length < sizeof(arp_header_t) + header->hardware_length * 2u + header->protocol_length * 2u)){
     493                return EINVAL;
     494        }
     495        proto = arp_protos_find(&device->protos, protocol_unmap(device->service, ntohs(header->protocol)));
     496        if(! proto){
     497                return ENOENT;
     498        }
     499        src_hw = ((uint8_t *) header) + sizeof(arp_header_t);
     500        src_proto = src_hw + header->hardware_length;
     501        des_hw = src_proto + header->protocol_length;
     502        des_proto = des_hw + header->hardware_length;
     503        hw_source = arp_addr_find(&proto->addresses, (char *) src_proto, CONVERT_SIZE(uint8_t, char, header->protocol_length));
     504        // exists?
     505        if(hw_source){
     506                if(hw_source->length != CONVERT_SIZE(uint8_t, char, header->hardware_length)){
     507                        return EINVAL;
     508                }
     509                memcpy(hw_source->value, src_hw, hw_source->length);
     510        }
     511        // is my protocol address?
     512        if(proto->addr->length != CONVERT_SIZE(uint8_t, char, header->protocol_length)){
     513                return EINVAL;
     514        }
     515        if(! str_lcmp(proto->addr->value, (char *) des_proto, proto->addr->length)){
     516                // not already upadted?
     517                if(! hw_source){
     518                        hw_source = measured_string_create_bulk((char *) src_hw, CONVERT_SIZE(uint8_t, char, header->hardware_length));
     519                        if(! hw_source){
     520                                return ENOMEM;
     521                        }
     522                        ERROR_PROPAGATE(arp_addr_add(&proto->addresses, (char *) src_proto, CONVERT_SIZE(uint8_t, char, header->protocol_length), hw_source));
     523                }
     524                if(ntohs(header->operation) == ARPOP_REQUEST){
     525                        header->operation = htons(ARPOP_REPLY);
     526                        memcpy(des_proto, src_proto, header->protocol_length);
     527                        memcpy(src_proto, proto->addr->value, header->protocol_length);
     528                        memcpy(src_hw, device->addr->value, device->packet_dimension.addr_len);
     529                        memcpy(des_hw, hw_source->value, header->hardware_length);
     530                        ERROR_PROPAGATE(packet_set_addr(packet, src_hw, des_hw, header->hardware_length));
     531                        nil_send_msg(device->phone, device_id, packet, SERVICE_ARP);
     532                        return 1;
     533                }
     534        }
     535        return EOK;
     536}
     537
     538task_id_t arp_task_get_id(void){
     539        return task_get_id();
     540}
     541
     542measured_string_ref arp_translate_message(device_id_t device_id, services_t protocol, measured_string_ref target){
     543        arp_device_ref device;
     544        arp_proto_ref proto;
     545        measured_string_ref addr;
     546        size_t length;
     547        packet_t packet;
     548        arp_header_ref header;
     549
     550        if(! target){
     551                return NULL;
     552        }
     553        device = arp_cache_find(&arp_globals.cache, device_id);
     554        if(! device){
     555                return NULL;
     556        }
     557        proto = arp_protos_find(&device->protos, protocol);
     558        if((! proto) || (proto->addr->length != target->length)){
     559                return NULL;
     560        }
     561        addr = arp_addr_find(&proto->addresses, target->value, target->length);
     562        if(addr){
     563                return addr;
     564        }
     565        // ARP packet content size = header + (address + translation) * 2
     566        length = 8 + (CONVERT_SIZE(char, uint8_t, proto->addr->length) + CONVERT_SIZE(char, uint8_t, device->addr->length)) * 2;
     567        if(length > device->packet_dimension.content){
     568                return NULL;
     569        }
     570        packet = packet_get_4(arp_globals.net_phone, device->packet_dimension.addr_len, device->packet_dimension.prefix, length, device->packet_dimension.suffix);
     571        if(! packet){
     572                return NULL;
     573        }
     574        header = (arp_header_ref) packet_suffix(packet, length);
     575        if(! header){
     576                pq_release(arp_globals.net_phone, packet_get_id(packet));
     577                return NULL;
     578        }
     579        header->hardware = htons(device->hardware);
     580        header->hardware_length = (uint8_t) device->addr->length;
     581        header->protocol = htons(protocol_map(device->service, protocol));
     582        header->protocol_length = (uint8_t) proto->addr->length;
     583        header->operation = htons(ARPOP_REQUEST);
     584        length = sizeof(arp_header_t);
     585        memcpy(((uint8_t *) header) + length, device->addr->value, device->addr->length);
     586        length += device->addr->length;
     587        memcpy(((uint8_t *) header) + length, proto->addr->value, proto->addr->length);
     588        length += proto->addr->length;
     589        bzero(((uint8_t *) header) + length, device->addr->length);
     590        length += device->addr->length;
     591        memcpy(((uint8_t *) header) + length, target->value, target->length);
     592        if(packet_set_addr(packet, (uint8_t *) device->addr->value, (uint8_t *) device->broadcast_addr->value, CONVERT_SIZE(char, uint8_t, device->addr->length)) != EOK){
     593                pq_release(arp_globals.net_phone, packet_get_id(packet));
     594                return NULL;
     595        }
     596        nil_send_msg(device->phone, device_id, packet, SERVICE_ARP);
     597        return NULL;
     598}
     599
     600int arp_translate_req(int arp_phone, device_id_t device_id, services_t protocol, measured_string_ref address, measured_string_ref * translation, char ** data){
     601        measured_string_ref tmp;
     602
     603        fibril_rwlock_read_lock(&arp_globals.lock);
     604        tmp = arp_translate_message(device_id, protocol, address);
     605        if(tmp){
     606                *translation = measured_string_copy(tmp);
     607                fibril_rwlock_read_unlock(&arp_globals.lock);
     608                if(*translation){
     609                        *data = (** translation).value;
     610                        return EOK;
     611                }else{
     612                        return ENOMEM;
     613                }
     614        }else{
     615                fibril_rwlock_read_unlock(&arp_globals.lock);
     616                return ENOENT;
     617        }
     618}
     619
    620620/** @}
    621621 */
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