forked from KolibriOS/kolibrios
726 lines
20 KiB
PHP
726 lines
20 KiB
PHP
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; ;;
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;; Copyright (C) KolibriOS team 2004-2008. All rights reserved. ;;
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;; Distributed under terms of the GNU General Public License ;;
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;; ;;
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;; ARP.INC ;;
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;; ;;
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;; Address Resolution Protocol ;;
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;; ;;
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;; This file contains the following: ;;
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;; arp_table_manager - Manages an ARPTable ;;
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;; arp_request - Sends an ARP request on the ethernet ;;
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;; arp_handler - Called when an ARP packet is received ;;
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;; ;;
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;; Changes history: ;;
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;; 22.09.2003 - [Mike Hibbett] : mikeh@oceanfree.net ;;
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;; 11.11.2006 - [Johnny_B] and [smb] ;;
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;; ;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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$Revision: 983 $
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ARP_NO_ENTRY equ 0
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ARP_VALID_MAPPING equ 1
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ARP_AWAITING_RESPONSE equ 2
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ARP_RESPONSE_TIMEOUT equ 3
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ETHER_ARP equ 0x0608
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ARP_REQ_OPCODE equ 0x0100 ; request
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ARP_REP_OPCODE equ 0x0200 ; reply
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ARP_TABLE_SIZE equ 20 ; Size of table
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struct ARP_ENTRY
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.IP dd ?
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.MAC dp ?
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.Status dw ?
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.TTL dw ? ; in seconds
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.size:
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ends
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struct ARP_Packet
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.HardwareType dw ?
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.ProtocolType dw ?
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.HardwareSize db ?
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.ProtocolSize db ?
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.Opcode dw ?
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.SenderMAC dp ?
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.SenderIP dd ?
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.TargetMAC dp ?
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.TargetIP dd ?
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ends
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; The TTL field is decremented every second, and is deleted when it
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; reaches 0. It is refreshed every time a packet is received
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; If the TTL field is 0xFFFF it is a static entry and is never deleted
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; The status field can be the following values:
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; 0x0000 entry not used
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; 0x0001 entry holds a valid mapping
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; 0x0002 entry contains an IP address, awaiting ARP response
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; 0x0003 No response received to ARP request.
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; The last status value is provided to allow the network layer to delete
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; a packet that is queued awaiting an ARP response
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align 4
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uglobal
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NumARP dd ?
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ARPTable rb ARP_ENTRY.size * ARP_TABLE_SIZE
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ARP_PACKETS_TX rd MAX_NET_DEVICES
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ARP_PACKETS_RX rd MAX_NET_DEVICES
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endg
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ARP_init:
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xor eax, eax
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mov [NumARP], eax
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mov edi, ARP_PACKETS_TX
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mov ecx, 2*MAX_NET_DEVICES
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rep stosd
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ret
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;***************************************************************************
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; Function
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; arp_table_manager [by Johnny_B]
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;
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; Description
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; Does a most required operations with ARP-table
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; IN:
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; Operation: see Opcode's constants below
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; Index: Index of entry in the ARP-table
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; Extra: Extra parameter for some Opcodes
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; OUT:
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; EAX = Returned value depends on opcodes, more detailed see below
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;
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;***************************************************************************
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;Opcode's constants
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ARP_TABLE_ADD equ 1
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ARP_TABLE_DEL equ 2
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ARP_TABLE_GET equ 3
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ARP_TABLE_GET_ENTRIES_NUMBER equ 4
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ARP_TABLE_IP_TO_MAC equ 5
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ARP_TABLE_TIMER equ 6
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;Index's constants
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EXTRA_IS_ARP_PACKET_PTR equ 0 ;if Extra contain pointer to ARP_Packet
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EXTRA_IS_ARP_ENTRY_PTR equ -1 ;if Extra contain pointer to ARP_ENTRY
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align 4
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proc arp_table_manager stdcall uses ebx esi edi ecx edx, Opcode:DWORD,Index:DWORD,Extra:DWORD
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mov ebx, ARPTable ;ARPTable base
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mov ecx, dword[NumARP] ;ARP-entries counter
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mov eax, dword[Opcode]
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cmp eax, ARP_TABLE_TIMER
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je .timer
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DEBUGF 1,"ARP table manager opcode:%u numARP:%u\n",eax,ecx
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cmp eax, ARP_TABLE_ADD
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je .add
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cmp eax, ARP_TABLE_DEL
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je .del
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cmp eax, ARP_TABLE_GET
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je .get
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cmp eax, ARP_TABLE_IP_TO_MAC
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je .ip_to_mac
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cmp eax, ARP_TABLE_GET_ENTRIES_NUMBER
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je .get_entries_number
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jmp .exit ;if unknown opcode
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;;BEGIN TIMER
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;;Description: it must be callback every second. It is responsible for removing expired routes.
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;;IN: Operation: ARP_TABLE_TIMER
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;; Index: must be zero
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;; Extra: must be zero
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;;OUT:
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;; EAX=not defined
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;;
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.timer:
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test ecx, ecx
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jz .exit ;if NumARP=0 nothing to do
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; sub ecx, ARP_TABLE_ENTRIES ;ecx=dynamic entries number
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; jz .exit ;if NumARP=number of static entries then exit
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; add ebx, ARP_TABLE_ENTRIES*ARP_ENTRY_SIZE ;ebx=dynamic entries base
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.timer_loop:
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movsx esi, word [ebx + ARP_ENTRY.TTL]
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cmp esi, 0xFFFFFFFF
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je .timer_loop_end ;if TTL==0xFFFF then it's static entry
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test esi, esi
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jnz .timer_loop_end_with_dec ;if TTL!=0
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; Ok, TTL is 0
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;if Status==AWAITING_RESPONSE and TTL==0
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;then we have to change it to ARP_RESPONSE_TIMEOUT
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cmp word [ebx + ARP_ENTRY.Status], ARP_AWAITING_RESPONSE
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jne @f
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mov word [ebx + ARP_ENTRY.Status], ARP_RESPONSE_TIMEOUT
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mov word [ebx + ARP_ENTRY.TTL], word 0x000A ;10 sec
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jmp .timer_loop_end
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@@:
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;if TTL==0 and Status==VALID_MAPPING, we have to delete it
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;if TTL==0 and Status==RESPONSE_TIMEOUT, delete too
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mov esi, dword[NumARP]
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sub esi, ecx ;esi=index of entry, will be deleted
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stdcall arp_table_manager,ARP_TABLE_DEL,esi,0 ;opcode,index,extra
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jmp .timer_loop_end
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.timer_loop_end_with_dec:
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dec word [ebx + ARP_ENTRY.TTL] ;decrease TTL
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.timer_loop_end:
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add ebx, ARP_ENTRY.size
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loop .timer_loop
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jmp .exit
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;;END TIMER
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;;BEGIN ADD
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;;Description: it adds an entry in the table. If ARP-table already
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;; contains same IP, it will be updated.
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;;IN: Operation: ARP_TABLE_ADD
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;; Index: specifies what contains Extra-parameter
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;; Extra: if Index==EXTRA_IS_ARP_Packet_PTR,
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;; then Extra contains pointer to ARP_Packet,
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;; otherwise Extra contains pointer to ARP_ENTRY
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;;OUT:
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;; EAX=index of entry, that has been added
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;;
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.add:
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DEBUGF 1,"1"
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sub esp, ARP_ENTRY.size ;Allocate ARP_ENTRY_SIZE byte in stack
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mov esi, [Extra] ;pointer
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mov edi, [Index] ;opcode
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cmp edi, EXTRA_IS_ARP_PACKET_PTR
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je .ARP_Packet_to_entry ;if Extra contain ptr to ARP_Packet and we have to form arp-entry
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;else it contain ptr to arp-entry
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DEBUGF 1,"2"
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cld
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; esi already has been loaded
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mov edi, esp ;ebx + eax=ARPTable_base + ARP-entry_base(where we will add)
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mov ecx,ARP_ENTRY.size/2 ;ARP_ENTRY_SIZE must be even number!!!
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rep movsw ;copy
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jmp .search
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.ARP_Packet_to_entry:
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DEBUGF 1,"3"
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mov edx, dword[esi + ARP_Packet.SenderIP] ;esi=base of ARP_Packet
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mov [esp + ARP_ENTRY.IP], edx
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cld
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lea esi, [esi + ARP_Packet.SenderMAC]
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lea edi, [esp + ARP_ENTRY.MAC]
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movsd
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movsw
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mov word[esp + ARP_ENTRY.Status], ARP_VALID_MAPPING ; specify the type - a valid entry
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mov word[esp + ARP_ENTRY.TTL], 0x0E10 ; = 1 hour
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.search:
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DEBUGF 1,"4"
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mov edx, dword[esp + ARP_ENTRY.IP] ;edx=IP-address, which we'll search
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mov ecx, dword[NumARP] ;ecx=ARP-entries counter
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jecxz .add_to_end ;if ARP-entries number == 0
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imul eax, ecx, ARP_ENTRY.size ;eax=current table size(in bytes)
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@@:
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sub eax, ARP_ENTRY.size
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cmp dword[ebx + eax + ARP_ENTRY.IP], edx
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loopnz @b
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; jz .replace ; found, replace existing entry, ptr to it is in eax
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; .add_to_end:
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;
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; DEBUGF 1,"5\n"
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; ;else add to end
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; or eax,-1 ;set eax=0xFFFFFFFF if adding is impossible
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; mov ecx, dword[NumARP]
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; cmp ecx, ARP_TABLE_SIZE
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; je .add_exit ;if arp-entries number is equal to arp-table maxsize
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; imul eax, dword[NumARP], ARP_ENTRY.size ;eax=ptr to end of ARPTable
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; inc dword [NumARP] ;increase ARP-entries counter
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; .replace:
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DEBUGF 1,"Updating ARP entry: %x-%x-%x-%x-%x-%x = %u.%u.%u.%u to slot:%u\n",\
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[esp + ARP_ENTRY.MAC]:2,[esp + ARP_ENTRY.MAC+1]:2,[esp + ARP_ENTRY.MAC+2]:2,[esp + ARP_ENTRY.MAC+3]:2,[esp + ARP_ENTRY.MAC+4]:2,[esp + ARP_ENTRY.MAC+5]:2,\
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[esp + ARP_ENTRY.IP]:1,[esp + ARP_ENTRY.IP+1]:1,[esp + ARP_ENTRY.IP+2]:1,[esp + ARP_ENTRY.IP+3]:1,eax
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cld
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mov esi, esp ;esp=base of ARP-entry, that will be added
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lea edi, [ebx + eax] ;ebx + eax=ARPTable_base + ARP-entry_base(where we will add)
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mov ecx,ARP_ENTRY.size/2 ;ARP_ENTRY_SIZE must be even number!!!
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rep movsw
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mov ecx, ARP_ENTRY.size
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xor edx, edx ;"div" takes operand from EDX:EAX
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div ecx ;eax=index of entry, which has been added
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.add_exit:
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add esp, ARP_ENTRY.size ;free stack
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jmp .exit
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;;END ADD
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;;BEGIN DEL
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;;Description: it deletes an entry in the table.
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;;IN: Operation: ARP_TABLE_DEL
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;; Index: index of entry, that should be deleted
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;; Extra: must be zero
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;;OUT:
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;; EAX=not defined
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;;
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.del:
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mov esi, [Index]
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imul esi, ARP_ENTRY.size
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mov ecx, (ARP_TABLE_SIZE - 1) * ARP_ENTRY.size
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sub ecx, esi
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lea edi, [ebx + esi] ;edi=ptr to entry that should be deleted
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lea esi, [edi + ARP_ENTRY.size] ;esi=ptr to next entry
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shr ecx,1 ;ecx/2 => ARP_ENTRY_SIZE MUST BE EVEN NUMBER!
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cld
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rep movsw
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dec dword[NumARP] ;decrease arp-entries counter
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jmp .exit
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;;END DEL
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;;BEGIN GET
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;;Description: it reads an entry of table into buffer.
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;;IN: Operation: ARP_TABLE_GET
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;; Index: index of entry, that should be read
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;; Extra: pointer to buffer for reading(size must be equal to ARP_ENTRY_SIZE)
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;;OUT:
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;; EAX=not defined
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;;
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.get:
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mov esi, [Index]
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imul esi, ARP_ENTRY.size ;esi=ptr to required ARP_ENTRY
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mov edi, [Extra] ;edi=buffer for reading
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mov ecx, ARP_ENTRY.size/2 ; must be even number!!!
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cld
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rep movsw
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jmp .exit
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;;END GET
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;;BEGIN IP_TO_MAC
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;;Description: it gets an IP from Index, scans each entry in the table and writes
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;; MAC, that relates to specified IP, into buffer specified in Extra.
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;; And if it cannot find an IP-address in the table, it does an ARP-request of that.
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;;IN: Operation: ARP_TABLE_IP_TO_MAC
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;; Index: IP that should be transformed into MAC
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;; Extra: pointer to buffer where will be written the MAC-address.
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;;OUT:
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;; EAX=ARP table entry status code.
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;; If EAX==ARP_NO_ENTRY, IP isn't found in the table and we have sent the request.
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;; If EAX==ARP_AWAITING_RESPONSE, we wait the response from remote system.
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;; If EAX==ARP_RESPONSE_TIMEOUT, remote system not responds too long.
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;; If EAX==ARP_VALID_MAPPING, all is ok, we've got a true MAC.
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;;
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;; If MAC will equal to a zero, in the buffer. It means, that IP-address was not yet
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;; resolved, or that doesn't exist. I recommend you, to do at most 3-5 calls of this
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;; function with 1sec delay. sure, only if it not return a valid MAC after a first call.
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;;
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.ip_to_mac:
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DEBUGF 1,"Trying to find MAC for %u.%u.%u.%u\n",[Index]:1,[Index+1]:1,[Index+2]:1,[Index+3]:1
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xor eax, eax
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mov edi, dword[Extra]
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cld
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stosd
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stosw
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; first, check destination IP to see if it is on 'this' network.
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; The test is:
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; if ( destIP & subnet_mask == stack_ip & subnet_mask )
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; destination is local
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; else
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; destination is remote, so pass to gateway
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;;; TODO: get device number ! (in edx)
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xor edx, edx
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mov eax, [Index] ;eax=required IP
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mov esi, eax
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and esi, [SUBNET_LIST+edx]
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mov ecx, [IP_LIST+edx]
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and ecx, [SUBNET_LIST+edx]
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cmp esi, ecx
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je @f ;if we and target IP are located in the same network
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mov eax, [GATEWAY_LIST+edx]
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mov [Index], eax
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DEBUGF 1,"IP is not on subnet, using %u.%u.%u.%u instead\n",[Index]:1,[Index+1]:1,[Index+2]:1,[Index+3]:1
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@@:
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cmp dword[NumARP], 0
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je .ip_to_mac_send_request ;if ARP-table not contain an entries, we have to request IP.
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;EAX will be containing a zero, it's equal to ARP_NO_ENTRY
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mov ecx, dword[NumARP]
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imul esi, ecx, ARP_ENTRY.size ;esi=current ARP-table size
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@@:
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sub esi, ARP_ENTRY.size
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cmp [ebx + esi + ARP_ENTRY.IP], eax ; ebx=ARPTable base
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loopnz @b ; Return back if non match
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jnz .ip_to_mac_send_request ; and request IP->MAC if none found in the table
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; Return the entry status in eax
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movzx eax, word[ebx + esi + ARP_ENTRY.Status]
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DEBUGF 1,"MAC found: %x-%x-%x-%x-%x-%x status:%x in slot:%u\n",\
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[ebx + esi + ARP_ENTRY.MAC]:2,[ebx + esi + ARP_ENTRY.MAC+1]:2,[ebx + esi + ARP_ENTRY.MAC+2]:2,[ebx + esi + ARP_ENTRY.MAC+3]:2,[ebx + esi + ARP_ENTRY.MAC+4]:2,[ebx + esi + ARP_ENTRY.MAC+5]:2, ax, esi
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; esi holds index
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cld
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lea esi, [ebx + esi + ARP_ENTRY.MAC]
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mov edi, [Extra] ;edi=ptr to buffer for write MAC
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movsd
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movsw
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jmp .exit
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.ip_to_mac_send_request:
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;;; TODO: get device number ! (in edx)
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xor edx, edx
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mov edx, [ETH_DRV_LIST + 4*edx]
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lea ecx, [edx + ETH_DEVICE.mac]
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stdcall arp_request,[Index],[IP_LIST+edx],ecx ;TargetIP,SenderIP_ptr,SenderMAC_ptr
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mov eax, ARP_NO_ENTRY
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jmp .exit
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;;END IP_TO_MAC
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;;BEGIN GET_ENTRIES_NUMBER
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;;Description: returns an ARP-entries number in the ARPTable
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;;IN: Operation: ARP_TABLE_GET_ENTRIES_NUMBER
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;; Index: must be zero
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;; Extra: must be zero
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;;OUT:
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;; EAX=ARP-entries number in the ARPTable
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.get_entries_number:
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mov eax, dword[NumARP]
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jmp .exit
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;;END GET_ENTRIES_NUMBER
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.exit:
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ret
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endp
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;***************************************************************************
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; Function
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; arp_request [by Johnny_B]
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;
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; Description
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; Sends an ARP request on the ethernet
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; IN:
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; TargetIP : requested IP address
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; SenderIP_ptr : POINTER to sender's IP address(our system's address)
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; SenderMAC_ptr : POINTER to sender's MAC address(our system's address)
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; OUT:
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; EAX=0 (if all is ok), otherwise EAX is not defined
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;
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; EBX,ESI,EDI will be saved
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;
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;***************************************************************************
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proc arp_request stdcall uses ebx esi edi,\
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TargetIP:DWORD, SenderIP_ptr:DWORD, SenderMAC_ptr:DWORD
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DEBUGF 1,"Create ARP request\n"
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stdcall kernel_alloc, 60 ; minimum eth packet size
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test eax, eax
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jz .exit
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mov ebx, eax
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mov word [ebx + ETH_FRAME.Data + ARP_Packet.HardwareType], 0x0100 ;Ethernet
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mov word [ebx + ETH_FRAME.Data + ARP_Packet.ProtocolType], 0x0008 ;IP
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mov byte [ebx + ETH_FRAME.Data + ARP_Packet.HardwareSize], 0x06 ;MAC-addr length
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mov byte [ebx + ETH_FRAME.Data + ARP_Packet.ProtocolSize], 0x04 ;IP-addr length
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mov word [ebx + ETH_FRAME.Data + ARP_Packet.Opcode], 0x0100 ;Request
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DEBUGF 1,"1"
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cld
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mov esi, [SenderMAC_ptr]
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lea edi, [ebx + ETH_FRAME.Data + ARP_Packet.SenderMAC] ;Our MAC-addr
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movsd
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movsw
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DEBUGF 1,"2"
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mov esi, [SenderIP_ptr]
|
|
mov [ebx + ETH_FRAME.Data + ARP_Packet.SenderIP], esi ;Our IP-addr
|
|
; movsd
|
|
|
|
DEBUGF 1,"3"
|
|
|
|
lea edi, [ebx + ETH_FRAME.Data + ARP_Packet.TargetMAC] ; Required MAC-addr
|
|
xor eax, eax
|
|
stosd
|
|
stosw
|
|
|
|
DEBUGF 1,"4"
|
|
|
|
lea edi, [ebx + ETH_FRAME.DstMAC]
|
|
stosd
|
|
stosw
|
|
|
|
DEBUGF 1,"5"
|
|
|
|
mov esi, [TargetIP]
|
|
mov dword [ebx + ETH_FRAME.Data + ARP_Packet.TargetIP], esi ;Required IP-addr(we get it as function parameter)
|
|
|
|
|
|
DEBUGF 1,"6"
|
|
|
|
mov esi, [SenderMAC_ptr]
|
|
lea edi, [ebx + ETH_FRAME.SrcMAC]
|
|
movsd
|
|
movsw
|
|
|
|
DEBUGF 1,"7"
|
|
|
|
mov ax , ETHER_ARP
|
|
stosw
|
|
|
|
DEBUGF 1,"8"
|
|
|
|
;;; TODO: get device number in edx !!
|
|
xor edx, edx
|
|
shl edx, 2
|
|
|
|
push dword .returnaddr
|
|
push dword 60
|
|
push ebx
|
|
mov ebx, [ETH_DRV_LIST + edx]
|
|
jmp [ebx + ETH_DEVICE.transmit]
|
|
.returnaddr:
|
|
|
|
; Add an entry in the ARP table, awaiting response
|
|
sub esp, ARP_ENTRY.size ;allocate memory for ARP-entry
|
|
|
|
mov esi, dword[TargetIP]
|
|
mov dword[esp + ARP_ENTRY.IP],esi
|
|
|
|
lea edi, [esp + ARP_ENTRY.MAC]
|
|
xor eax, eax
|
|
stosd
|
|
stosw
|
|
|
|
mov word[esp + ARP_ENTRY.Status], ARP_AWAITING_RESPONSE
|
|
mov word[esp + ARP_ENTRY.TTL], 10 ; 10 seconds
|
|
|
|
stdcall arp_table_manager,ARP_TABLE_ADD,EXTRA_IS_ARP_ENTRY_PTR,esp
|
|
add esp, ARP_ENTRY.size ; free memory
|
|
|
|
.exit:
|
|
|
|
DEBUGF 1,"ARP request - end\n"
|
|
ret
|
|
endp
|
|
|
|
|
|
|
|
|
|
|
|
;-----------------------------------------------------
|
|
;
|
|
; ARP_Handler:
|
|
;
|
|
; This function handles ARP protocol over ethernet
|
|
; (other protocols may follow in the future)
|
|
;
|
|
; IN: Pointer to buffer in [esp]
|
|
; size of buffer in [esp+4]
|
|
; packet size (without ethernet header) in ecx
|
|
; OUT: /
|
|
;
|
|
;-----------------------------------------------------
|
|
align 4
|
|
ARP_Handler:
|
|
|
|
DEBUGF 1,"ARP_Handler - start\n"
|
|
cmp ecx, 28
|
|
jl .exit
|
|
|
|
; Is this a REQUEST?
|
|
; Is this a request for My Host IP
|
|
; Yes - So construct a response message.
|
|
; Send this message to the ethernet card for transmission
|
|
|
|
; push ebx edx
|
|
stdcall arp_table_manager, ARP_TABLE_ADD, EXTRA_IS_ARP_PACKET_PTR, edx
|
|
; pop edx ebx
|
|
|
|
cmp word [edx + ARP_Packet.Opcode], ARP_REQ_OPCODE ; Is this a request packet?
|
|
jne .exit
|
|
|
|
call ETH_struc2dev
|
|
DEBUGF 1,"Packet came from device: %u\n", edi
|
|
cmp edi, -1
|
|
jz .exit
|
|
|
|
mov eax, edi
|
|
shl eax, 2
|
|
add eax, IP_LIST
|
|
mov eax, [eax]
|
|
cmp eax, [edx + ARP_Packet.TargetIP] ; Is it looking for my IP address?
|
|
jnz .exit
|
|
push eax
|
|
push edi
|
|
|
|
; DEBUGF 1,"ETH_ARP_Handler - request for %u.%u.%u.%u\n",[edi+0]:1,[edi+1]:1,[edi+2]:1,[edi+3]:1
|
|
|
|
; OK, it is a request for one of our MAC addresses. Build the frame and send it
|
|
; We can reuse the buffer.
|
|
|
|
cld
|
|
lea esi, [edx + ARP_Packet.SenderMAC]
|
|
lea edi, [edx + ARP_Packet.TargetMAC]
|
|
movsd ; Move Sender Mac to Dest MAC
|
|
movsw ;
|
|
movsd ; Move sender IP to Dest IP
|
|
|
|
pop esi
|
|
mov esi, [ETH_DRV_LIST + 4*esi]
|
|
lea esi, [esi + ETH_DEVICE.mac]
|
|
lea edi, [edx + ARP_Packet.SenderMAC]
|
|
movsd ; Copy MAC address from in MAC_LIST
|
|
movsw ;
|
|
pop eax
|
|
stosd ; Write our IP
|
|
|
|
mov word [edx + ARP_Packet.Opcode], ARP_REP_OPCODE
|
|
|
|
; Now, Fill in ETHERNET header
|
|
|
|
mov edi, [esp]
|
|
lea esi, [edx + ARP_Packet.TargetMAC]
|
|
movsd
|
|
movsw
|
|
lea esi, [edx + ARP_Packet.SenderMAC]
|
|
movsd
|
|
movsw
|
|
mov ax , ETHER_ARP
|
|
stosw
|
|
|
|
jmp ETH_Sender ; And send it!
|
|
|
|
.exit:
|
|
call kernel_free
|
|
add esp, 4 ; pop (balance stack)
|
|
|
|
DEBUGF 1,"ARP_Handler - fail\n"
|
|
ret
|
|
|
|
|
|
|
|
|
|
;---------------------------------------------------------------------------
|
|
;
|
|
; ARP_API
|
|
;
|
|
; This function is called by system function 75
|
|
;
|
|
; IN: subfunction number in bl
|
|
; device number in bh
|
|
; ecx, edx, .. depends on subfunction
|
|
;
|
|
; OUT:
|
|
;
|
|
;---------------------------------------------------------------------------
|
|
|
|
align 4
|
|
ARP_API:
|
|
|
|
movzx eax, bh
|
|
shl eax, 2
|
|
|
|
test bl, bl
|
|
jz .packets_tx ; 0
|
|
dec bl
|
|
jz .packets_rx ; 1
|
|
dec bl
|
|
jz .entries ; 2
|
|
dec bl
|
|
jz .read ; 3
|
|
dec bl
|
|
jz .write ; 4
|
|
dec bl
|
|
jz .remove ; 5
|
|
dec bl
|
|
|
|
|
|
.error:
|
|
mov eax, -1
|
|
ret
|
|
|
|
.packets_tx:
|
|
add eax, ARP_PACKETS_TX
|
|
mov eax, [eax]
|
|
ret
|
|
|
|
.packets_rx:
|
|
add eax, ARP_PACKETS_RX
|
|
mov eax, [eax]
|
|
ret
|
|
|
|
.entries:
|
|
mov eax, [NumARP]
|
|
ret
|
|
|
|
.read:
|
|
; TODO: write code
|
|
ret
|
|
|
|
.write:
|
|
; TODO: write code
|
|
ret
|
|
|
|
.remove:
|
|
; TODO: write code
|
|
ret
|
|
|