WebSVN – HelenOS – Diff – //branches/network/uspace/srv/net/il/arp/arp.c

 /*
- * Copyright (c) 2008 Lukas Mejdrech
+ * 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:
 /** @addtogroup arp
  *  @{
  */
 /** @file
+ *  ARP module implementation.
+ *  @see arp.h
  */
 #include <as.h>
 #include <async.h>
 #include <malloc.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_proto_create( arp_proto_ref * proto, services_t service, measured_string_ref address );
-int arp_device_message( device_id_t device_id, services_t service, services_t protocol, measured_string_ref address );
-measured_string_ref arp_translate_message( device_id_t device, services_t protocol, measured_string_ref target );
-int arp_receive_message( device_id_t device_id, packet_t packet );
-int arp_clear_device_message( device_id_t device_id );
-void clear_device( arp_device_ref device );
-int arp_clean_cache_message( void );
-void arp_receiver( ipc_callid_t iid, ipc_call_t * icall );
-/** Initializes the ARP module.
- */
 int arp_initialize( void ){
-    arp_cache_initialize( & arp_globals.cache );
+    return arp_cache_initialize( & arp_globals.cache );
-    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_OCCURED( arp_addr_initialize( &( ** proto).addresses ))){
+    if( ERROR_OCCURRED( arp_addr_initialize( &( ** proto).addresses ))){
         free( * proto );
         return ERROR_CODE;
+    }
     return EOK;
+}
             free( proto->addr_data );
             proto->addr = address;
             proto->addr_data = address->value;
         }else{
             ERROR_PROPAGATE( arp_proto_create( & proto, protocol, address ));
-            if( ERROR_OCCURED( arp_protos_add( & device->protos, proto->service, proto ))){
+            if( ERROR_OCCURRED( arp_protos_add( & device->protos, proto->service, proto ))){
                 free( proto );
                 return ERROR_CODE;
+            }
+        }
         return EOK;
     }else{
         // create a new device
         device = ( arp_device_ref ) malloc( sizeof( arp_device_t ));
         if( ! device ) return ENOMEM;
         device->device_id = device_id;
-        if( ERROR_OCCURED( arp_protos_initialize( & device->protos ))
+        if( ERROR_OCCURRED( arp_protos_initialize( & device->protos ))
-        || ERROR_OCCURED( arp_proto_create( & proto, protocol, address ))){
+        || ERROR_OCCURRED( arp_proto_create( & proto, protocol, address ))){
             free( device );
             return ERROR_CODE;
+        }
-        if( ERROR_OCCURED( arp_protos_add( & device->protos, proto->service, proto ))){
+        if( ERROR_OCCURRED( arp_protos_add( & device->protos, proto->service, proto ))){
             arp_protos_destroy( & device->protos );
             free( device );
             return ERROR_CODE;
+        }
         device->service = service;
         // bind the new one
         device->phone = bind_service( device->service, device->device_id, SERVICE_ARP, 0, arp_receiver );
         // get packet dimensions
-        if( ERROR_OCCURED( async_req_1_4( device->phone, NET_NIL_PACKET_SPACE, device_id, & device->addr_len, & device->prefix, & device->content, & device->sufix ))){
+        if( ERROR_OCCURRED( async_req_1_4( device->phone, NET_NIL_PACKET_SPACE, device_id, & device->addr_len, & device->prefix, & device->content, & device->suffix ))){
             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_OCCURED( measured_strings_return( device->phone, & device->addr, & device->addr_data, 1 ))){
+        if( ERROR_OCCURRED( measured_strings_return( device->phone, & device->addr, & device->addr_data, 1 ))){
             arp_protos_destroy( & device->protos );
             free( device );
             async_wait_for( message, NULL );
             return ERROR_CODE;
+        }
         async_wait_for( message, & result );
-        if( ERROR_OCCURED( result )){
+        if( ERROR_OCCURRED( result )){
             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_OCCURED( measured_strings_return( device->phone, & device->broadcast_addr, & device->broadcast_data, 1 ))){
+        if( ERROR_OCCURRED( measured_strings_return( device->phone, & device->broadcast_addr, & device->broadcast_data, 1 ))){
             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_OCCURED( result )
+        if( ERROR_OCCURRED( result )
-        || ERROR_OCCURED( arp_cache_add( & arp_globals.cache, device->device_id, device ))){
+        || ERROR_OCCURRED( arp_cache_add( & arp_globals.cache, device->device_id, device ))){
             free( device->addr );
             free( device->addr_data );
             free( device->broadcast_addr );
             free( device->broadcast_data );
             arp_protos_destroy( & device->protos );
+    }
     return EOK;
+}
 measured_string_ref arp_translate_message( device_id_t device_id, services_t protocol, measured_string_ref target ){
-//  ERROR_DECLARE;
     arp_device_ref      device;
     arp_proto_ref       proto;
     measured_string_ref addr;
     size_t              length;
     packet_t            packet;
     // 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_5( arp_globals.networking_phone, SERVICE_ARP, device->addr_len, device->prefix, length, device->sufix );
+    packet = packet_get_5( arp_globals.networking_phone, SERVICE_ARP, device->addr_len, device->prefix, length, device->suffix );
     if( ! packet ) return NULL;
-    header = ( arp_header_ref ) packet_append( packet, length );
+    header = ( arp_header_ref ) packet_suffix( packet, length );
     header->hardware = device->hardware;
     header->hardware_length = device->addr->length;
     header->protocol = protocol_map( device->service, protocol );
     header->protocol_length = proto->addr->length;
     header->operation = ARPOP_REQUEST;
     memcpy((( uint8_t * ) header ) + length, proto->addr->value, proto->addr->length );
     length += proto->addr->length;
     memset((( uint8_t * ) header ) + length, 0, device->addr->length );
     length += device->addr->length;
     memcpy((( uint8_t * ) header ) + length, target->value, target->length );
-    // TODO send to the device->broadcast_addr as arp protocol
+    packet_set_addr( packet, ( uint8_t * ) device->addr->value, ( uint8_t * ) device->broadcast_addr->value, CONVERT_SIZE( char, uint8_t, device->addr->length ));
     async_msg_3( device->phone, NET_NETIF_SEND, device_id, SERVICE_ARP, packet_get_id( packet ));
     return NULL;
+}
 int arp_receive_message( device_id_t device_id, packet_t packet ){
 /*  measured_string_t   proto_target;
     aid_t               message;
     ipcarg_t            result;
     int                 index;
     ipc_call_t          answer;
-*/  int8_t *            src_hw;
+*/  uint8_t *           src_hw;
-    int8_t *            src_proto;
+    uint8_t *           src_proto;
-    int8_t *            des_hw;
+    uint8_t *           des_hw;
-    int8_t *            des_proto;
+    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( header->hardware != device->hardware ) return EINVAL;
     if( length < sizeof( arp_header_t ) + ( header->hardware_length + header->protocol_length ) * 2 ) return EINVAL;
     proto = arp_protos_find( & device->protos, protocol_unmap( device->service, header->protocol ));
     if( ! proto ) return ENOENT;
-    src_hw = (( int8_t * ) header ) + sizeof( arp_header_t );
+    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, src_proto, header->protocol_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 != header->hardware_length ) return EINVAL;
+        if( hw_source->length != CONVERT_SIZE( uint8_t, char, header->hardware_length )) return EINVAL;
-        memcpy( hw_source->value, src_hw, header->hardware_length );
+        memcpy( hw_source->value, src_hw, hw_source->length );
+    }
     // is my protocol address?
+    // TODO query protocol module?
 /*  proto_target.value = des_proto;
     proto_target.length = header->protocol_length;
     // TODO send necessary?
     message = async_send_0( proto->phone, NET_IL_MY_ADDR, & answer );
-    if( ERROR_OCCURED( measured_strings_send( device->phone, & proto_target, 1 ))){
+    if( ERROR_OCCURRED( measured_strings_send( device->phone, & proto_target, 1 ))){
         async_wait_for( message, NULL );
         return ERROR_CODE;
+    }
     async_wait_for( message, & result );
     if( result == EOK ){
-*/  if( proto->addr->length != header->hardware_length ) return EINVAL;
+*/  if( proto->addr->length != CONVERT_SIZE( uint8_t, char, header->hardware_length )) return EINVAL;
-    if( ! strncmp( proto->addr->value, des_proto, proto->addr->length )){
+    if( ! strncmp( proto->addr->value, ( char * ) des_proto, proto->addr->length )){
         // not already upadted?
         if( ! hw_source ){
-            hw_source = measured_string_create_bulk( src_hw, header->hardware_length );
+            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, src_proto, header->protocol_length, hw_source ));
+            ERROR_PROPAGATE( arp_addr_add( & proto->addresses, ( char * ) src_proto, CONVERT_SIZE( uint8_t, char, header->protocol_length ), hw_source ));
+        }
         if( header->operation == ARPOP_REQUEST ){
             header->operation = ARPOP_REPLY;
 /*          for( index = 0; index + header->hardware_length < header->protocol_length; index += header->hardware_length ){
                 memcpy( src_hw, src_proto + index, header->hardware_length );
             memcpy( src_hw, des_hw, header->hardware_length );
             memcpy( des_hw, hw_source->value, hw_source->length );
 */          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, hw_source->length );
+            memcpy( des_hw, hw_source->value, header->hardware_length );
-            // TODO send to the hw_source as arp protocol
+            packet_set_addr( packet, src_hw, des_hw, header->hardware_length );
             async_msg_3( device->phone, NET_NETIF_SEND, device_id, SERVICE_ARP, packet_get_id( packet ));
         }else{
             packet_release( arp_globals.networking_phone, packet_get_id( packet ));
+        }
+    }
     count = arp_cache_count( & arp_globals.cache );
     while( count > 0 ){
         device = arp_cache_get_index( & arp_globals.cache, count );
         if( device ){
             clear_device( device );
-            if( device->broadcast_addr ) free( device->broadcast_addr );
+            if( device->addr_data ) free( device->addr_data );
             if( device->broadcast_data ) free( device->broadcast_data );
+        }
+    }
     arp_cache_clear( & arp_globals.cache );
     return EOK;
+}
 int arp_message( ipc_callid_t callid, ipc_call_t * call, ipc_call_t * answer, int * answer_count ){
     ERROR_DECLARE;
-//  packet_t            packet;
     measured_string_ref address;
     measured_string_ref translation;
     char *              data;
     * answer_count = 0;
     switch( IPC_GET_METHOD( * call )){
         case IPC_M_PHONE_HUNGUP:
             return EOK;
         case NET_ARP_DEVICE:
             ERROR_PROPAGATE( measured_strings_receive( & address, & data, 1 ));
-            if( ERROR_OCCURED( arp_device_message( IPC_GET_DEVICE( call ), IPC_GET_SERVICE( call ), IPC_GET_PROTO( call ), address ))){
+            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:
+}
 void arp_receiver( ipc_callid_t iid, ipc_call_t * icall ){
     ERROR_DECLARE;
-    ipc_callid_t    callid;
-    ipc_call_t      call;
-//  int             result;
     packet_t        packet;
-    /*
-     * Accept the connection
-     *  - Answer the first IPC_M_CONNECT_ME_TO call.
-     */
-    //TODO auto accept?
-    //ipc_answer_0( iid, EOK );
     while( true ){
-        callid = async_get_call( & call );
-        switch( IPC_GET_METHOD( call )){
+        switch( IPC_GET_METHOD( * icall )){
             case NET_IL_DEVICE_STATE:
                 //TODO clear device if off?
                 break;
             case NET_IL_RECEIVED:
-                if( ! ERROR_OCCURED( packet_translate( arp_globals.networking_phone, & packet, IPC_GET_PACKET( & call )))){
+                if( ! ERROR_OCCURRED( packet_translate( arp_globals.networking_phone, & packet, IPC_GET_PACKET( icall )))){
-                    ERROR_CODE = arp_receive_message( IPC_GET_DEVICE( & call ), packet );
+                    ERROR_CODE = arp_receive_message( IPC_GET_DEVICE( icall ), packet );
+                }
-                ipc_answer_0( callid, ERROR_CODE );
+                ipc_answer_0( iid, ERROR_CODE );
                 break;
             default:
-                ipc_answer_0( callid, ENOTSUP );
+                ipc_answer_0( iid, ENOTSUP );
+        }
+        iid = async_get_call( icall );
+    }
+}
 /** @}
  */

Subversion Repositories HelenOS

(root)//branches/network/uspace/srv/net/il/arp/arp.c – Rev 3901 → 3912