| 567,6 → 567,99 |
|---|
| |
| |
| |
| ;--------------------------------------------------------------------------- |
| ; |
| ; ARP_decrease_entry_ttls |
| ; |
| ; IN: / |
| ; OUT: / |
| ; |
| ;--------------------------------------------------------------------------- |
| |
| align 4 |
| ARP_decrease_entry_ttls: |
| |
| mov ecx, [NumARP] |
| test ecx, ecx |
| jz .exit |
| |
| mov ebx, ARPTable |
| |
| .timer_loop: |
| |
| movsx esi, word [ebx + ARP_ENTRY.TTL] |
| cmp esi, 0xFFFFFFFF |
| je .timer_loop_end ;if TTL==0xFFFF then it's static entry |
| |
| test esi, esi |
| jnz .timer_loop_end_with_dec ;if TTL!=0 |
| |
| ; Ok, TTL is 0 |
| ;if Status==AWAITING_RESPONSE and TTL==0 |
| ;then we have to change it to ARP_RESPONSE_TIMEOUT |
| cmp word [ebx + ARP_ENTRY.Status], ARP_AWAITING_RESPONSE |
| jne @f |
| |
| mov word [ebx + ARP_ENTRY.Status], ARP_RESPONSE_TIMEOUT |
| mov word [ebx + ARP_ENTRY.TTL], word 0x000A ;10 sec |
| jmp .timer_loop_end |
| |
| @@: |
| ;if TTL==0 and Status==VALID_MAPPING, we have to delete it |
| ;if TTL==0 and Status==RESPONSE_TIMEOUT, delete too |
| mov esi, dword[NumARP] |
| sub esi, ecx ;esi=index of entry, will be deleted |
| |
| call ARP_del_entry |
| |
| jmp .timer_loop_end |
| |
| |
| .timer_loop_end_with_dec: |
| |
| dec word [ebx + ARP_ENTRY.TTL] ;decrease TTL |
| |
| .timer_loop_end: |
| |
| add ebx, ARP_ENTRY.size |
| loop .timer_loop |
| |
| .exit: |
| |
| ret |
| |
| |
| ;--------------------------------------------------------------------------- |
| ; |
| ; ARP_del_entry |
| ; |
| ; IN: entry # in esi |
| ; OUT: / |
| ; |
| ;--------------------------------------------------------------------------- |
| |
| align 4 |
| ARP_del_entry: |
| |
| imul esi, ARP_ENTRY.size |
| |
| mov ecx, (ARP_TABLE_SIZE - 1) * ARP_ENTRY.size |
| sub ecx, esi |
| |
| lea edi, [ebx + esi] ;edi=ptr to entry that should be deleted |
| lea esi, [edi + ARP_ENTRY.size] ;esi=ptr to next entry |
| |
| shr ecx,1 ;ecx/2 => ARP_ENTRY_SIZE MUST BE EVEN NUMBER! |
| cld |
| rep movsw |
| |
| dec dword[NumARP] ;decrease arp-entries counter |
| ret |
| |
| |
| |
| |
| |
| ;----------------------------------------------------- |
| ; |
| ; ARP_Handler: |