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Rev 3200 Rev 3203
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;;          GNU GENERAL PUBLIC LICENSE                             ;;
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;;          GNU GENERAL PUBLIC LICENSE                             ;;
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;;             Version 2, June- 1991                               ;;
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;;             Version 2, June- 1991                               ;;
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;;                                                                 ;;
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;;                                                                 ;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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$Revision: 3200 $
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$Revision: 3203 $
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ARP_NO_ENTRY            = 0
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ARP_NO_ENTRY            = 0
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ARP_VALID_MAPPING       = 1
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ARP_VALID_MAPPING       = 1
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;
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;
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; ARP_add_entry (or update)
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; ARP_add_entry (or update)
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;
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;
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; IN:  esi = ptr to entry (can easily be made on the stack)
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; IN:  esi = ptr to entry (can easily be made on the stack)
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; OUT: eax = entry #, -1 on error
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; OUT: eax = entry #, -1 on error
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;      edi = ptr to newly created entry
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;
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;
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;-----------------------------------------------------------------      ; TODO: use a mutex
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;-----------------------------------------------------------------      ; TODO: use a mutex
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align 4
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align 4
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ARP_add_entry:
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ARP_add_entry:
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  .add:
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  .add:
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        mov     ecx, sizeof.ARP_entry/2
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        mov     ecx, sizeof.ARP_entry/2
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        rep     movsw
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        rep     movsw
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        inc     [NumARP]
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        inc     [NumARP]
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        sub     edi, sizeof.ARP_entry
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        DEBUGF  1,"entry=%u\n", eax
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        DEBUGF  1,"entry=%u\n", eax
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        pushd   0                       ; mac
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        pushd   0                       ; mac
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        pushw   0
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        pushw   0
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        pushd   eax                     ; ip
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        pushd   eax                     ; ip
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        mov     esi, esp
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        mov     esi, esp
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        call    ARP_add_entry
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        call    ARP_add_entry
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        add     esp, sizeof.ARP_entry
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        add     esp, sizeof.ARP_entry   ; clear the entry from stack
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        cmp     eax, -1
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        cmp     eax, -1                 ; did ARP_add_entry fail?
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        je      .full
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        je      .full
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; And send a request
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        pop     edi eax
 - 
 
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        mov     esi, edi
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        call    ARP_output_request      ; IP in eax
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        pop     edi eax                 ; IP in eax, device number in edi, for ARP_output_request
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;; TODO: check if driver could transmit packet
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        push    esi edi
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        call    ARP_output_request      ; And send a request
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        pop     edi esi
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        mov     eax, -2                 ; request send
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;-----------------------------------------------
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        ret
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; At this point, we got an ARP entry in the list
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  .found_it:
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        cmp     [esi + ARP_entry.Status], ARP_VALID_MAPPING             ; Does it have a MAC assigned?
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        je      .valid
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        cmp     [esi + ARP_entry.Status], ARP_AWAITING_RESPONSE         ; Are we waiting for reply from remote end?
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        jne     .give_up
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        push    esi
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        mov     esi, 10                 ; wait 10 ms
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        call    delay_ms
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  .found_it:
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        pop     esi
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        DEBUGF  1,"ARP_IP_to_MAC: found IP\n"
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        jmp     .found_it               ; now check again
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        cmp     [esi + ARP_entry.Status], ARP_VALID_MAPPING
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        jne     .invalid
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        movzx   eax, word [esi + ARP_entry.MAC]
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        mov     ebx, dword[esi + ARP_entry.MAC + 2]
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        ret
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  .valid:
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  .invalid:
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        DEBUGF  1,"ARP_IP_to_MAC: found MAC\n"
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        DEBUGF  1,"ARP_IP_to_MAC: entry has no valid mapping!\n"
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        movzx   eax, word[esi + ARP_entry.MAC]
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        mov     ebx, dword[esi + ARP_entry.MAC + 2]
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        ret
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        mov     eax, -1
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        ret
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  .full:
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        DEBUGF  1,"ARP_IP_to_MAC: table is full!\n"
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  .full:
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        add     esp, 8