Changeset 4687a26c in mainline for uspace/srv/net/il/arp/arp.c


Ignore:
Timestamp:
2010-11-02T18:29:01Z (13 years ago)
Author:
Jakub Jermar <jakub@…>
Branches:
lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export
Children:
4f35b9ff
Parents:
76e1121f (diff), 28f4adb (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the (diff) links above to see all the changes relative to each parent.
Message:

Merge mainline changes.

File:
1 edited

Legend:

Unmodified
Added
Removed
  • uspace/srv/net/il/arp/arp.c

    r76e1121f r4687a26c  
    2828
    2929/** @addtogroup arp
    30  *  @{
     30 * @{
    3131 */
    3232
    3333/** @file
    34  *  ARP module implementation.
    35  *  @see arp.h
    36  */
     34 * ARP module implementation.
     35 * @see arp.h
     36 */
     37
     38#include "arp.h"
     39#include "arp_header.h"
     40#include "arp_oc.h"
     41#include "arp_module.h"
    3742
    3843#include <async.h>
     
    4348#include <str.h>
    4449#include <task.h>
     50#include <adt/measured_strings.h>
    4551#include <ipc/ipc.h>
    4652#include <ipc/services.h>
    47 
    48 #include <net_err.h>
    49 #include <net_messages.h>
    50 #include <net_modules.h>
    51 #include <net_byteorder.h>
    52 #include <net_device.h>
    53 #include <arp_interface.h>
     53#include <ipc/net.h>
     54#include <ipc/arp.h>
     55#include <ipc/il.h>
     56#include <byteorder.h>
     57#include <err.h>
     58
     59#include <net/modules.h>
     60#include <net/device.h>
     61#include <net/packet.h>
     62
    5463#include <nil_interface.h>
    5564#include <protocol_map.h>
    56 #include <adt/measured_strings.h>
    57 #include <packet/packet.h>
    58 #include <packet/packet_client.h>
     65#include <packet_client.h>
    5966#include <packet_remote.h>
    60 #include <il_messages.h>
    6167#include <il_interface.h>
    6268#include <il_local.h>
    63 #include <arp_messages.h>
    64 
    65 #include "arp.h"
    66 #include "arp_header.h"
    67 #include "arp_oc.h"
    68 #include "arp_module.h"
    69 
    70 
    71 /** ARP module name.
    72  */
     69
     70
     71/** ARP module name. */
    7372#define NAME  "arp"
    7473
    75 /** ARP global data.
    76  */
    77 arp_globals_t   arp_globals;
     74/** ARP global data. */
     75arp_globals_t arp_globals;
     76
     77DEVICE_MAP_IMPLEMENT(arp_cache, arp_device_t);
     78INT_MAP_IMPLEMENT(arp_protos, arp_proto_t);
     79GENERIC_CHAR_MAP_IMPLEMENT(arp_addr, measured_string_t);
    7880
    7981/** Clears the device specific data.
    80  *  @param[in] device The device specific data.
    81  */
    82 void arp_clear_device(arp_device_ref device);
    83 
    84 /** Creates new protocol specific data.
    85  *  Allocates and returns the needed memory block as the proto parameter.
    86  *  @param[out] proto The allocated protocol specific data.
    87  *  @param[in] service The protocol module service.
    88  *  @param[in] address The actual protocol device address.
    89  *  @returns EOK on success.
    90  *  @returns ENOMEM if there is not enough memory left.
    91  */
    92 int arp_proto_create(arp_proto_ref * proto, services_t service, measured_string_ref address);
    93 
    94 /** @name Message processing functions
    95  */
    96 /*@{*/
    97 
    98 /** Registers the device.
    99  *  Creates new device entry in the cache or updates the protocol address if the device with the device identifier and the driver service exists.
    100  *  @param[in] device_id The device identifier.
    101  *  @param[in] service The device driver service.
    102  *  @param[in] protocol The protocol service.
    103  *  @param[in] address The actual device protocol address.
    104  *  @returns EOK on success.
    105  *  @returns EEXIST if another device with the same device identifier and different driver service exists.
    106  *  @returns ENOMEM if there is not enough memory left.
    107  *  @returns Other error codes as defined for the measured_strings_return() function.
    108  */
    109 int arp_device_message(device_id_t device_id, services_t service, services_t protocol, measured_string_ref address);
    110 
    111 /** Updates the device content length according to the new MTU value.
    112  *  @param[in] device_id The device identifier.
    113  *  @param[in] mtu The new mtu value.
    114  *  @returns ENOENT if device is not found.
    115  *  @returns EOK on success.
    116  */
    117 int arp_mtu_changed_message(device_id_t device_id, size_t mtu);
    118 
    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.
    121  *  Responses to the ARP request if the packet is the ARP request and is targeted to my address.
    122  *  @param[in] device_id The source device identifier.
    123  *  @param[in,out] packet The received packet.
    124  *  @returns EOK on success and the packet is no longer needed.
    125  *  @returns 1 on success and the packet has been reused.
    126  *  @returns EINVAL if the packet is too small to carry an ARP packet.
    127  *  @returns EINVAL if the received address lengths differs from the registered values.
    128  *  @returns ENOENT if the device is not found in the cache.
    129  *  @returns ENOENT if the protocol for the device is not found in the cache.
    130  *  @returns ENOMEM if there is not enough memory left.
    131  */
    132 int arp_receive_message(device_id_t device_id, packet_t packet);
    133 
    134 /** Returns the hardware address for the given protocol address.
    135  *  Sends the ARP request packet if the hardware address is not found in the cache.
    136  *  @param[in] device_id The device identifier.
    137  *  @param[in] protocol The protocol service.
    138  *  @param[in] target The target protocol address.
    139  *  @returns The hardware address of the target.
    140  *  @returns NULL if the target parameter is NULL.
    141  *  @returns NULL if the device is not found.
    142  *  @returns NULL if the device packet is too small to send a&nbsp;request.
    143  *  @returns NULL if the hardware address is not found in the cache.
    144  */
    145 measured_string_ref arp_translate_message(device_id_t device_id, services_t protocol, measured_string_ref target);
    146 
    147 /*@}*/
    148 
    149 DEVICE_MAP_IMPLEMENT(arp_cache, arp_device_t)
    150 
    151 INT_MAP_IMPLEMENT(arp_protos, arp_proto_t)
    152 
    153 GENERIC_CHAR_MAP_IMPLEMENT(arp_addr, measured_string_t)
    154 
    155 int arp_clean_cache_req(int arp_phone){
     82 *
     83 * @param[in] device    The device specific data.
     84 */
     85static void arp_clear_device(arp_device_ref device)
     86{
     87        int count;
     88        arp_proto_ref proto;
     89
     90        for (count = arp_protos_count(&device->protos) - 1; count >= 0;
     91            count--) {
     92                proto = arp_protos_get_index(&device->protos, count);
     93                if (proto) {
     94                        if (proto->addr)
     95                                free(proto->addr);
     96                        if (proto->addr_data)
     97                                free(proto->addr_data);
     98                        arp_addr_destroy(&proto->addresses);
     99                }
     100        }
     101        arp_protos_clear(&device->protos);
     102}
     103
     104static int arp_clean_cache_req(int arp_phone)
     105{
    156106        int count;
    157107        arp_device_ref device;
    158108
    159109        fibril_rwlock_write_lock(&arp_globals.lock);
    160         for(count = arp_cache_count(&arp_globals.cache) - 1; count >= 0; -- count){
     110        for (count = arp_cache_count(&arp_globals.cache) - 1; count >= 0;
     111            count--) {
    161112                device = arp_cache_get_index(&arp_globals.cache, count);
    162                 if(device){
     113                if (device) {
    163114                        arp_clear_device(device);
    164                         if(device->addr_data){
     115                        if (device->addr_data)
    165116                                free(device->addr_data);
    166                         }
    167                         if(device->broadcast_data){
     117                        if (device->broadcast_data)
    168118                                free(device->broadcast_data);
    169                         }
    170119                }
    171120        }
     
    176125}
    177126
    178 int arp_clear_address_req(int arp_phone, device_id_t device_id, services_t protocol, measured_string_ref address){
     127static int
     128arp_clear_address_req(int arp_phone, device_id_t device_id, services_t protocol,
     129    measured_string_ref address)
     130{
    179131        arp_device_ref device;
    180132        arp_proto_ref proto;
     
    182134        fibril_rwlock_write_lock(&arp_globals.lock);
    183135        device = arp_cache_find(&arp_globals.cache, device_id);
    184         if(! device){
     136        if (!device) {
    185137                fibril_rwlock_write_unlock(&arp_globals.lock);
    186138                return ENOENT;
    187139        }
    188140        proto = arp_protos_find(&device->protos, protocol);
    189         if(! proto){
     141        if (!proto) {
    190142                fibril_rwlock_write_unlock(&arp_globals.lock);
    191143                return ENOENT;
     
    196148}
    197149
    198 void arp_clear_device(arp_device_ref device){
    199         int count;
    200         arp_proto_ref proto;
    201 
    202         for(count = arp_protos_count(&device->protos) - 1; count >= 0; -- count){
    203                 proto = arp_protos_get_index(&device->protos, count);
    204                 if(proto){
    205                         if(proto->addr){
    206                                 free(proto->addr);
    207                         }
    208                         if(proto->addr_data){
    209                                 free(proto->addr_data);
    210                         }
    211                         arp_addr_destroy(&proto->addresses);
    212                 }
    213         }
    214         arp_protos_clear(&device->protos);
    215 }
    216 
    217 int arp_clear_device_req(int arp_phone, device_id_t device_id){
     150
     151static int arp_clear_device_req(int arp_phone, device_id_t device_id)
     152{
    218153        arp_device_ref device;
    219154
    220155        fibril_rwlock_write_lock(&arp_globals.lock);
    221156        device = arp_cache_find(&arp_globals.cache, device_id);
    222         if(! device){
     157        if (!device) {
    223158                fibril_rwlock_write_unlock(&arp_globals.lock);
    224159                return ENOENT;
     
    230165}
    231166
    232 int arp_connect_module(services_t service){
    233         if(service != SERVICE_ARP){
    234                 return EINVAL;
    235         }
    236         return EOK;
    237 }
    238 
    239 int arp_device_message(device_id_t device_id, services_t service, services_t protocol, measured_string_ref address){
     167/** Creates new protocol specific data.
     168 *
     169 * Allocates and returns the needed memory block as the proto parameter.
     170 *
     171 * @param[out] proto    The allocated protocol specific data.
     172 * @param[in] service   The protocol module service.
     173 * @param[in] address   The actual protocol device address.
     174 * @returns             EOK on success.
     175 * @returns             ENOMEM if there is not enough memory left.
     176 */
     177static int
     178arp_proto_create(arp_proto_ref *proto, services_t service,
     179    measured_string_ref address)
     180{
     181        ERROR_DECLARE;
     182
     183        *proto = (arp_proto_ref) malloc(sizeof(arp_proto_t));
     184        if (!*proto)
     185                return ENOMEM;
     186        (*proto)->service = service;
     187        (*proto)->addr = address;
     188        (*proto)->addr_data = address->value;
     189        if (ERROR_OCCURRED(arp_addr_initialize(&(*proto)->addresses))) {
     190                free(*proto);
     191                return ERROR_CODE;
     192        }
     193        return EOK;
     194}
     195
     196/** Registers the device.
     197 *
     198 * Creates new device entry in the cache or updates the protocol address if the
     199 * device with the device identifier and the driver service exists.
     200 *
     201 * @param[in] device_id The device identifier.
     202 * @param[in] service   The device driver service.
     203 * @param[in] protocol  The protocol service.
     204 * @param[in] address   The actual device protocol address.
     205 * @returns             EOK on success.
     206 * @returns             EEXIST if another device with the same device identifier
     207 *                      and different driver service exists.
     208 * @returns             ENOMEM if there is not enough memory left.
     209 * @returns             Other error codes as defined for the
     210 *                      measured_strings_return() function.
     211 */
     212static int
     213arp_device_message(device_id_t device_id, services_t service,
     214    services_t protocol, measured_string_ref address)
     215{
    240216        ERROR_DECLARE;
    241217
     
    248224        // an existing device?
    249225        device = arp_cache_find(&arp_globals.cache, device_id);
    250         if(device){
    251                 if(device->service != service){
     226        if (device) {
     227                if (device->service != service) {
    252228                        printf("Device %d already exists\n", device->device_id);
    253229                        fibril_rwlock_write_unlock(&arp_globals.lock);
     
    255231                }
    256232                proto = arp_protos_find(&device->protos, protocol);
    257                 if(proto){
     233                if (proto) {
    258234                        free(proto->addr);
    259235                        free(proto->addr_data);
    260236                        proto->addr = address;
    261237                        proto->addr_data = address->value;
    262                 }else{
    263                         if(ERROR_OCCURRED(arp_proto_create(&proto, protocol, address))){
     238                } else {
     239                        if (ERROR_OCCURRED(arp_proto_create(&proto, protocol,
     240                            address))) {
    264241                                fibril_rwlock_write_unlock(&arp_globals.lock);
    265242                                return ERROR_CODE;
    266243                        }
    267                         index = arp_protos_add(&device->protos, proto->service, proto);
    268                         if(index < 0){
     244                        index = arp_protos_add(&device->protos, proto->service,
     245                            proto);
     246                        if (index < 0) {
    269247                                fibril_rwlock_write_unlock(&arp_globals.lock);
    270248                                free(proto);
    271249                                return index;
    272250                        }
    273                         printf("New protocol added:\n\tdevice id\t= %d\n\tproto\t= %d", device_id, protocol);
    274                 }
    275         }else{
     251                        printf("New protocol added:\n\tdevice id\t= "
     252                            "%d\n\tproto\t= %d", device_id, protocol);
     253                }
     254        } else {
    276255                hardware = hardware_map(service);
    277                 if(! hardware){
     256                if (!hardware)
    278257                        return ENOENT;
    279                 }
     258               
    280259                // create a new device
    281260                device = (arp_device_ref) malloc(sizeof(arp_device_t));
    282                 if(! device){
     261                if (!device) {
    283262                        fibril_rwlock_write_unlock(&arp_globals.lock);
    284263                        return ENOMEM;
     
    286265                device->hardware = hardware;
    287266                device->device_id = device_id;
    288                 if(ERROR_OCCURRED(arp_protos_initialize(&device->protos))
    289                         || ERROR_OCCURRED(arp_proto_create(&proto, protocol, address))){
     267                if (ERROR_OCCURRED(arp_protos_initialize(&device->protos)) ||
     268                    ERROR_OCCURRED(arp_proto_create(&proto, protocol,
     269                    address))) {
    290270                        fibril_rwlock_write_unlock(&arp_globals.lock);
    291271                        free(device);
     
    293273                }
    294274                index = arp_protos_add(&device->protos, proto->service, proto);
    295                 if(index < 0){
     275                if (index < 0) {
    296276                        fibril_rwlock_write_unlock(&arp_globals.lock);
    297277                        arp_protos_destroy(&device->protos);
     
    300280                }
    301281                device->service = service;
     282               
    302283                // bind the new one
    303                 device->phone = nil_bind_service(device->service, (ipcarg_t) device->device_id, SERVICE_ARP, arp_globals.client_connection);
    304                 if(device->phone < 0){
     284                device->phone = nil_bind_service(device->service,
     285                    (ipcarg_t) device->device_id, SERVICE_ARP,
     286                    arp_globals.client_connection);
     287                if (device->phone < 0) {
    305288                        fibril_rwlock_write_unlock(&arp_globals.lock);
    306289                        arp_protos_destroy(&device->protos);
     
    308291                        return EREFUSED;
    309292                }
     293               
    310294                // get packet dimensions
    311                 if(ERROR_OCCURRED(nil_packet_size_req(device->phone, device_id, &device->packet_dimension))){
     295                if (ERROR_OCCURRED(nil_packet_size_req(device->phone, device_id,
     296                    &device->packet_dimension))) {
    312297                        fibril_rwlock_write_unlock(&arp_globals.lock);
    313298                        arp_protos_destroy(&device->protos);
     
    315300                        return ERROR_CODE;
    316301                }
     302               
    317303                // get hardware address
    318                 if(ERROR_OCCURRED(nil_get_addr_req(device->phone, device_id, &device->addr, &device->addr_data))){
     304                if (ERROR_OCCURRED(nil_get_addr_req(device->phone, device_id,
     305                    &device->addr, &device->addr_data))) {
    319306                        fibril_rwlock_write_unlock(&arp_globals.lock);
    320307                        arp_protos_destroy(&device->protos);
     
    322309                        return ERROR_CODE;
    323310                }
     311               
    324312                // get broadcast address
    325                 if(ERROR_OCCURRED(nil_get_broadcast_addr_req(device->phone, device_id, &device->broadcast_addr, &device->broadcast_data))){
     313                if (ERROR_OCCURRED(nil_get_broadcast_addr_req(device->phone,
     314                    device_id, &device->broadcast_addr,
     315                    &device->broadcast_data))) {
    326316                        fibril_rwlock_write_unlock(&arp_globals.lock);
    327317                        free(device->addr);
     
    331321                        return ERROR_CODE;
    332322                }
    333                 if(ERROR_OCCURRED(arp_cache_add(&arp_globals.cache, device->device_id, device))){
     323               
     324                if (ERROR_OCCURRED(arp_cache_add(&arp_globals.cache,
     325                    device->device_id, device))) {
    334326                        fibril_rwlock_write_unlock(&arp_globals.lock);
    335327                        free(device->addr);
     
    341333                        return ERROR_CODE;
    342334                }
    343                 printf("%s: Device registered (id: %d, type: 0x%x, service: %d, proto: %d)\n",
    344                     NAME, device->device_id, device->hardware, device->service, protocol);
     335                printf("%s: Device registered (id: %d, type: 0x%x, service: %d,"
     336                    " proto: %d)\n", NAME, device->device_id, device->hardware,
     337                    device->service, protocol);
    345338        }
    346339        fibril_rwlock_write_unlock(&arp_globals.lock);
    347         return EOK;
    348 }
    349 
    350 int arp_device_req(int arp_phone, device_id_t device_id, services_t protocol, services_t netif, measured_string_ref address){
    351         ERROR_DECLARE;
    352 
    353         measured_string_ref tmp;
    354 
    355         // copy the given address for exclusive use
    356         tmp = measured_string_copy(address);
    357         if(ERROR_OCCURRED(arp_device_message(device_id, netif, protocol, tmp))){
    358                 free(tmp->value);
    359                 free(tmp);
    360         }
    361         return ERROR_CODE;
    362 }
    363 
    364 int arp_initialize(async_client_conn_t client_connection){
     340       
     341        return EOK;
     342}
     343
     344/** Initializes the ARP module.
     345 *
     346 *  @param[in] client_connection The client connection processing function.
     347 *                      The module skeleton propagates its own one.
     348 *  @returns            EOK on success.
     349 *  @returns            ENOMEM if there is not enough memory left.
     350 */
     351int arp_initialize(async_client_conn_t client_connection)
     352{
    365353        ERROR_DECLARE;
    366354
     
    373361}
    374362
    375 int arp_message_standalone(ipc_callid_t callid, ipc_call_t *call,
    376     ipc_call_t *answer, int *answer_count)
    377 {
    378         ERROR_DECLARE;
    379        
    380         measured_string_ref address;
    381         measured_string_ref translation;
    382         char * data;
    383         packet_t packet;
    384         packet_t next;
    385        
    386         *answer_count = 0;
    387         switch (IPC_GET_METHOD(*call)) {
    388                 case IPC_M_PHONE_HUNGUP:
    389                         return EOK;
    390                 case NET_ARP_DEVICE:
    391                         ERROR_PROPAGATE(measured_strings_receive(&address, &data, 1));
    392                         if(ERROR_OCCURRED(arp_device_message(IPC_GET_DEVICE(call), IPC_GET_SERVICE(call), ARP_GET_NETIF(call), address))){
    393                                 free(address);
    394                                 free(data);
    395                         }
    396                         return ERROR_CODE;
    397                 case NET_ARP_TRANSLATE:
    398                         ERROR_PROPAGATE(measured_strings_receive(&address, &data, 1));
    399                         fibril_rwlock_read_lock(&arp_globals.lock);
    400                         translation = arp_translate_message(IPC_GET_DEVICE(call), IPC_GET_SERVICE(call), address);
    401                         free(address);
    402                         free(data);
    403                         if(! translation){
    404                                 fibril_rwlock_read_unlock(&arp_globals.lock);
    405                                 return ENOENT;
    406                         }
    407                         ERROR_CODE = measured_strings_reply(translation, 1);
    408                         fibril_rwlock_read_unlock(&arp_globals.lock);
    409                         return ERROR_CODE;
    410                 case NET_ARP_CLEAR_DEVICE:
    411                         return arp_clear_device_req(0, IPC_GET_DEVICE(call));
    412                 case NET_ARP_CLEAR_ADDRESS:
    413                         ERROR_PROPAGATE(measured_strings_receive(&address, &data, 1));
    414                         arp_clear_address_req(0, IPC_GET_DEVICE(call), IPC_GET_SERVICE(call), address);
    415                         free(address);
    416                         free(data);
    417                         return EOK;
    418                 case NET_ARP_CLEAN_CACHE:
    419                         return arp_clean_cache_req(0);
    420                 case NET_IL_DEVICE_STATE:
    421                         // do nothing - keep the cache
    422                         return EOK;
    423                 case NET_IL_RECEIVED:
    424                         if(! ERROR_OCCURRED(packet_translate_remote(arp_globals.net_phone, &packet, IPC_GET_PACKET(call)))){
    425                                 fibril_rwlock_read_lock(&arp_globals.lock);
    426                                 do{
    427                                         next = pq_detach(packet);
    428                                         ERROR_CODE = arp_receive_message(IPC_GET_DEVICE(call), packet);
    429                                         if(ERROR_CODE != 1){
    430                                                 pq_release_remote(arp_globals.net_phone, packet_get_id(packet));
    431                                         }
    432                                         packet = next;
    433                                 }while(packet);
    434                                 fibril_rwlock_read_unlock(&arp_globals.lock);
    435                         }
    436                         return ERROR_CODE;
    437                 case NET_IL_MTU_CHANGED:
    438                         return arp_mtu_changed_message(IPC_GET_DEVICE(call), IPC_GET_MTU(call));
    439         }
    440        
    441         return ENOTSUP;
    442 }
    443 
    444 int arp_mtu_changed_message(device_id_t device_id, size_t mtu){
     363/** Updates the device content length according to the new MTU value.
     364 *
     365 * @param[in] device_id The device identifier.
     366 * @param[in] mtu       The new mtu value.
     367 * @returns             ENOENT if device is not found.
     368 * @returns             EOK on success.
     369 */
     370static int arp_mtu_changed_message(device_id_t device_id, size_t mtu)
     371{
    445372        arp_device_ref device;
    446373
    447374        fibril_rwlock_write_lock(&arp_globals.lock);
    448375        device = arp_cache_find(&arp_globals.cache, device_id);
    449         if(! device){
     376        if (!device) {
    450377                fibril_rwlock_write_unlock(&arp_globals.lock);
    451378                return ENOENT;
    452379        }
    453380        device->packet_dimension.content = mtu;
     381        fibril_rwlock_write_unlock(&arp_globals.lock);
    454382        printf("arp - device %d changed mtu to %d\n\n", device_id, mtu);
    455         fibril_rwlock_write_unlock(&arp_globals.lock);
    456         return EOK;
    457 }
    458 
    459 int arp_proto_create(arp_proto_ref * proto, services_t service, measured_string_ref address){
    460         ERROR_DECLARE;
    461 
    462         *proto = (arp_proto_ref) malloc(sizeof(arp_proto_t));
    463         if(!(*proto)){
    464                 return ENOMEM;
    465         }
    466         (** proto).service = service;
    467         (** proto).addr = address;
    468         (** proto).addr_data = address->value;
    469         if(ERROR_OCCURRED(arp_addr_initialize(&(** proto).addresses))){
    470                 free(*proto);
    471                 return ERROR_CODE;
    472         }
    473         return EOK;
    474 }
    475 
    476 int arp_receive_message(device_id_t device_id, packet_t packet){
     383        return EOK;
     384}
     385
     386/** Processes the received ARP packet.
     387 *
     388 * Updates the source hardware address if the source entry exists or the packet
     389 * is targeted to my protocol address.
     390 * Responses to the ARP request if the packet is the ARP request and is
     391 * targeted to my address.
     392 *
     393 * @param[in] device_id The source device identifier.
     394 * @param[in,out] packet The received packet.
     395 * @returns             EOK on success and the packet is no longer needed.
     396 * @returns             One on success and the packet has been reused.
     397 * @returns             EINVAL if the packet is too small to carry an ARP
     398 *                      packet.
     399 * @returns             EINVAL if the received address lengths differs from
     400 *                      the registered values.
     401 * @returns             ENOENT if the device is not found in the cache.
     402 * @returns             ENOENT if the protocol for the device is not found in
     403 *                      the cache.
     404 * @returns             ENOMEM if there is not enough memory left.
     405 */
     406static int arp_receive_message(device_id_t device_id, packet_t packet)
     407{
    477408        ERROR_DECLARE;
    478409
     
    482413        arp_proto_ref proto;
    483414        measured_string_ref hw_source;
    484         uint8_t * src_hw;
    485         uint8_t * src_proto;
    486         uint8_t * des_hw;
    487         uint8_t * des_proto;
     415        uint8_t *src_hw;
     416        uint8_t *src_proto;
     417        uint8_t *des_hw;
     418        uint8_t *des_proto;
    488419
    489420        length = packet_get_data_length(packet);
    490         if(length <= sizeof(arp_header_t)){
     421        if (length <= sizeof(arp_header_t))
    491422                return EINVAL;
    492         }
     423
    493424        device = arp_cache_find(&arp_globals.cache, device_id);
    494         if(! device){
     425        if (!device)
    495426                return ENOENT;
    496         }
     427
    497428        header = (arp_header_ref) packet_get_data(packet);
    498         if((ntohs(header->hardware) != device->hardware)
    499                 || (length < sizeof(arp_header_t) + header->hardware_length * 2u + header->protocol_length * 2u)){
     429        if ((ntohs(header->hardware) != device->hardware) ||
     430            (length < sizeof(arp_header_t) + header->hardware_length * 2U +
     431            header->protocol_length * 2U)) {
    500432                return EINVAL;
    501433        }
    502         proto = arp_protos_find(&device->protos, protocol_unmap(device->service, ntohs(header->protocol)));
    503         if(! proto){
     434
     435        proto = arp_protos_find(&device->protos,
     436            protocol_unmap(device->service, ntohs(header->protocol)));
     437        if (!proto)
    504438                return ENOENT;
    505         }
     439
    506440        src_hw = ((uint8_t *) header) + sizeof(arp_header_t);
    507441        src_proto = src_hw + header->hardware_length;
    508442        des_hw = src_proto + header->protocol_length;
    509443        des_proto = des_hw + header->hardware_length;
    510         hw_source = arp_addr_find(&proto->addresses, (char *) src_proto, CONVERT_SIZE(uint8_t, char, header->protocol_length));
     444        hw_source = arp_addr_find(&proto->addresses, (char *) src_proto,
     445            CONVERT_SIZE(uint8_t, char, header->protocol_length));
    511446        // exists?
    512         if(hw_source){
    513                 if(hw_source->length != CONVERT_SIZE(uint8_t, char, header->hardware_length)){
     447        if (hw_source) {
     448                if (hw_source->length != CONVERT_SIZE(uint8_t, char,
     449                    header->hardware_length)) {
    514450                        return EINVAL;
    515451                }
     
    517453        }
    518454        // is my protocol address?
    519         if(proto->addr->length != CONVERT_SIZE(uint8_t, char, header->protocol_length)){
     455        if (proto->addr->length != CONVERT_SIZE(uint8_t, char,
     456            header->protocol_length)) {
    520457                return EINVAL;
    521458        }
    522         if(! str_lcmp(proto->addr->value, (char *) des_proto, proto->addr->length)){
     459        if (!str_lcmp(proto->addr->value, (char *) des_proto,
     460            proto->addr->length)) {
    523461                // not already upadted?
    524                 if(! hw_source){
    525                         hw_source = measured_string_create_bulk((char *) src_hw, CONVERT_SIZE(uint8_t, char, header->hardware_length));
    526                         if(! hw_source){
     462                if (!hw_source) {
     463                        hw_source = measured_string_create_bulk((char *) src_hw,
     464                            CONVERT_SIZE(uint8_t, char,
     465                            header->hardware_length));
     466                        if (!hw_source)
    527467                                return ENOMEM;
    528                         }
    529                         ERROR_PROPAGATE(arp_addr_add(&proto->addresses, (char *) src_proto, CONVERT_SIZE(uint8_t, char, header->protocol_length), hw_source));
    530                 }
    531                 if(ntohs(header->operation) == ARPOP_REQUEST){
     468
     469                        ERROR_PROPAGATE(arp_addr_add(&proto->addresses,
     470                            (char *) src_proto, CONVERT_SIZE(uint8_t, char,
     471                            header->protocol_length), hw_source));
     472                }
     473                if (ntohs(header->operation) == ARPOP_REQUEST) {
    532474                        header->operation = htons(ARPOP_REPLY);
    533475                        memcpy(des_proto, src_proto, header->protocol_length);
    534                         memcpy(src_proto, proto->addr->value, header->protocol_length);
    535                         memcpy(src_hw, device->addr->value, device->packet_dimension.addr_len);
    536                         memcpy(des_hw, hw_source->value, header->hardware_length);
    537                         ERROR_PROPAGATE(packet_set_addr(packet, src_hw, des_hw, header->hardware_length));
    538                         nil_send_msg(device->phone, device_id, packet, SERVICE_ARP);
     476                        memcpy(src_proto, proto->addr->value,
     477                            header->protocol_length);
     478                        memcpy(src_hw, device->addr->value,
     479                            device->packet_dimension.addr_len);
     480                        memcpy(des_hw, hw_source->value,
     481                            header->hardware_length);
     482                        ERROR_PROPAGATE(packet_set_addr(packet, src_hw, des_hw,
     483                            header->hardware_length));
     484                        nil_send_msg(device->phone, device_id, packet,
     485                            SERVICE_ARP);
    539486                        return 1;
    540487                }
    541488        }
    542         return EOK;
    543 }
    544 
    545 task_id_t arp_task_get_id(void){
    546         return task_get_id();
    547 }
    548 
    549 measured_string_ref arp_translate_message(device_id_t device_id, services_t protocol, measured_string_ref target){
     489
     490        return EOK;
     491}
     492
     493
     494/** Returns the hardware address for the given protocol address.
     495 *
     496 * Sends the ARP request packet if the hardware address is not found in the
     497 * cache.
     498 *
     499 * @param[in] device_id The device identifier.
     500 * @param[in] protocol  The protocol service.
     501 * @param[in] target    The target protocol address.
     502 * @returns             The hardware address of the target.
     503 * @returns             NULL if the target parameter is NULL.
     504 * @returns             NULL if the device is not found.
     505 * @returns             NULL if the device packet is too small to send a
     506 *                      request.
     507 * @returns             NULL if the hardware address is not found in the cache.
     508 */
     509static measured_string_ref
     510arp_translate_message(device_id_t device_id, services_t protocol,
     511    measured_string_ref target)
     512{
    550513        arp_device_ref device;
    551514        arp_proto_ref proto;
     
    555518        arp_header_ref header;
    556519
    557         if(! target){
     520        if (!target)
    558521                return NULL;
    559         }
     522
    560523        device = arp_cache_find(&arp_globals.cache, device_id);
    561         if(! device){
     524        if (!device)
    562525                return NULL;
    563         }
     526
    564527        proto = arp_protos_find(&device->protos, protocol);
    565         if((! proto) || (proto->addr->length != target->length)){
     528        if (!proto || (proto->addr->length != target->length))
    566529                return NULL;
    567         }
     530
    568531        addr = arp_addr_find(&proto->addresses, target->value, target->length);
    569         if(addr){
     532        if (addr)
    570533                return addr;
    571         }
     534
    572535        // ARP packet content size = header + (address + translation) * 2
    573         length = 8 + (CONVERT_SIZE(char, uint8_t, proto->addr->length) + CONVERT_SIZE(char, uint8_t, device->addr->length)) * 2;
    574         if(length > device->packet_dimension.content){
     536        length = 8 + 2 * (CONVERT_SIZE(char, uint8_t, proto->addr->length) +
     537            CONVERT_SIZE(char, uint8_t, device->addr->length));
     538        if (length > device->packet_dimension.content)
    575539                return NULL;
    576         }
    577         packet = packet_get_4_remote(arp_globals.net_phone, device->packet_dimension.addr_len, device->packet_dimension.prefix, length, device->packet_dimension.suffix);
    578         if(! packet){
     540
     541        packet = packet_get_4_remote(arp_globals.net_phone,
     542            device->packet_dimension.addr_len, device->packet_dimension.prefix,
     543            length, device->packet_dimension.suffix);
     544        if (!packet)
    579545                return NULL;
    580         }
     546
    581547        header = (arp_header_ref) packet_suffix(packet, length);
    582         if(! header){
     548        if (!header) {
    583549                pq_release_remote(arp_globals.net_phone, packet_get_id(packet));
    584550                return NULL;
    585551        }
     552
    586553        header->hardware = htons(device->hardware);
    587554        header->hardware_length = (uint8_t) device->addr->length;
     
    590557        header->operation = htons(ARPOP_REQUEST);
    591558        length = sizeof(arp_header_t);
    592         memcpy(((uint8_t *) header) + length, device->addr->value, device->addr->length);
     559        memcpy(((uint8_t *) header) + length, device->addr->value,
     560            device->addr->length);
    593561        length += device->addr->length;
    594         memcpy(((uint8_t *) header) + length, proto->addr->value, proto->addr->length);
     562        memcpy(((uint8_t *) header) + length, proto->addr->value,
     563            proto->addr->length);
    595564        length += proto->addr->length;
    596565        bzero(((uint8_t *) header) + length, device->addr->length);
    597566        length += device->addr->length;
    598567        memcpy(((uint8_t *) header) + length, target->value, target->length);
    599         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){
     568
     569        if (packet_set_addr(packet, (uint8_t *) device->addr->value,
     570            (uint8_t *) device->broadcast_addr->value,
     571            CONVERT_SIZE(char, uint8_t, device->addr->length)) != EOK) {
    600572                pq_release_remote(arp_globals.net_phone, packet_get_id(packet));
    601573                return NULL;
    602574        }
     575
    603576        nil_send_msg(device->phone, device_id, packet, SERVICE_ARP);
    604577        return NULL;
    605578}
    606579
    607 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){
    608         measured_string_ref tmp;
    609 
    610         fibril_rwlock_read_lock(&arp_globals.lock);
    611         tmp = arp_translate_message(device_id, protocol, address);
    612         if(tmp){
    613                 *translation = measured_string_copy(tmp);
     580
     581/** Processes the ARP message.
     582 *
     583 * @param[in] callid    The message identifier.
     584 * @param[in] call      The message parameters.
     585 * @param[out] answer   The message answer parameters.
     586 * @param[out] answer_count The last parameter for the actual answer in the
     587 *                      answer parameter.
     588 * @returns             EOK on success.
     589 * @returns             ENOTSUP if the message is not known.
     590 *
     591 * @see arp_interface.h
     592 * @see IS_NET_ARP_MESSAGE()
     593 */
     594int
     595arp_message_standalone(ipc_callid_t callid, ipc_call_t *call,
     596    ipc_call_t *answer, int *answer_count)
     597{
     598        ERROR_DECLARE;
     599       
     600        measured_string_ref address;
     601        measured_string_ref translation;
     602        char *data;
     603        packet_t packet;
     604        packet_t next;
     605       
     606        *answer_count = 0;
     607        switch (IPC_GET_METHOD(*call)) {
     608        case IPC_M_PHONE_HUNGUP:
     609                return EOK;
     610       
     611        case NET_ARP_DEVICE:
     612                ERROR_PROPAGATE(measured_strings_receive(&address, &data, 1));
     613                if (ERROR_OCCURRED(arp_device_message(IPC_GET_DEVICE(call),
     614                    IPC_GET_SERVICE(call), ARP_GET_NETIF(call), address))) {
     615                        free(address);
     616                        free(data);
     617                }
     618                return ERROR_CODE;
     619       
     620        case NET_ARP_TRANSLATE:
     621                ERROR_PROPAGATE(measured_strings_receive(&address, &data, 1));
     622                fibril_rwlock_read_lock(&arp_globals.lock);
     623                translation = arp_translate_message(IPC_GET_DEVICE(call),
     624                    IPC_GET_SERVICE(call), address);
     625                free(address);
     626                free(data);
     627                if (!translation) {
     628                        fibril_rwlock_read_unlock(&arp_globals.lock);
     629                        return ENOENT;
     630                }
     631                ERROR_CODE = measured_strings_reply(translation, 1);
    614632                fibril_rwlock_read_unlock(&arp_globals.lock);
    615                 if(*translation){
    616                         *data = (** translation).value;
    617                         return EOK;
    618                 }else{
    619                         return ENOMEM;
    620                 }
    621         }else{
    622                 fibril_rwlock_read_unlock(&arp_globals.lock);
    623                 return ENOENT;
    624         }
     633                return ERROR_CODE;
     634
     635        case NET_ARP_CLEAR_DEVICE:
     636                return arp_clear_device_req(0, IPC_GET_DEVICE(call));
     637
     638        case NET_ARP_CLEAR_ADDRESS:
     639                ERROR_PROPAGATE(measured_strings_receive(&address, &data, 1));
     640                arp_clear_address_req(0, IPC_GET_DEVICE(call),
     641                    IPC_GET_SERVICE(call), address);
     642                free(address);
     643                free(data);
     644                return EOK;
     645       
     646        case NET_ARP_CLEAN_CACHE:
     647                return arp_clean_cache_req(0);
     648       
     649        case NET_IL_DEVICE_STATE:
     650                // do nothing - keep the cache
     651                return EOK;
     652       
     653        case NET_IL_RECEIVED:
     654                if (ERROR_NONE(packet_translate_remote(arp_globals.net_phone,
     655                    &packet, IPC_GET_PACKET(call)))) {
     656                        fibril_rwlock_read_lock(&arp_globals.lock);
     657                        do {
     658                                next = pq_detach(packet);
     659                                ERROR_CODE =
     660                                    arp_receive_message(IPC_GET_DEVICE(call),
     661                                    packet);
     662                                if (ERROR_CODE != 1) {
     663                                        pq_release_remote(arp_globals.net_phone,
     664                                            packet_get_id(packet));
     665                                }
     666                                packet = next;
     667                        } while (packet);
     668                        fibril_rwlock_read_unlock(&arp_globals.lock);
     669                }
     670                return ERROR_CODE;
     671       
     672        case NET_IL_MTU_CHANGED:
     673                return arp_mtu_changed_message(IPC_GET_DEVICE(call),
     674                    IPC_GET_MTU(call));
     675        }
     676       
     677        return ENOTSUP;
    625678}
    626679
    627680/** Default thread for new connections.
    628681 *
    629  *  @param[in] iid The initial message identifier.
    630  *  @param[in] icall The initial message call structure.
    631  *
    632  */
    633 static void il_client_connection(ipc_callid_t iid, ipc_call_t * icall)
     682 * @param[in] iid       The initial message identifier.
     683 * @param[in] icall     The initial message call structure.
     684 */
     685static void il_client_connection(ipc_callid_t iid, ipc_call_t *icall)
    634686{
    635687        /*
     
    639691        ipc_answer_0(iid, EOK);
    640692       
    641         while(true) {
     693        while (true) {
    642694                ipc_call_t answer;
    643695                int answer_count;
     
    654706                    &answer_count);
    655707               
    656                 /* End if said to either by the message or the processing result */
    657                 if ((IPC_GET_METHOD(call) == IPC_M_PHONE_HUNGUP) || (res == EHANGUP))
     708                /*
     709                 * End if told to either by the message or the processing
     710                 * result.
     711                 */
     712                if ((IPC_GET_METHOD(call) == IPC_M_PHONE_HUNGUP) ||
     713                    (res == EHANGUP))
    658714                        return;
    659715               
     
    665721/** Starts the module.
    666722 *
    667  *  @param argc The count of the command line arguments. Ignored parameter.
    668  *  @param argv The command line parameters. Ignored parameter.
    669  *
    670  *  @returns EOK on success.
    671  *  @returns Other error codes as defined for each specific module start function.
    672  *
     723 * @returns             EOK on success.
     724 * @returns             Other error codes as defined for each specific module
     725 *                      start function.
    673726 */
    674727int main(int argc, char *argv[])
     
    677730       
    678731        /* Start the module */
    679         if (ERROR_OCCURRED(il_module_start_standalone(il_client_connection)))
    680                 return ERROR_CODE;
    681        
     732        ERROR_PROPAGATE(il_module_start_standalone(il_client_connection));
    682733        return EOK;
    683734}
     
    685736/** @}
    686737 */
     738
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