INCLUDE Irvine$32.$inc

CD$\_$LEN $=30$ ; Length of the of ip address

$.$data

CCA BYTE $44*$CD$\_$LEN$+1$ DUP$(0)$ ; array for storing course codes

buffer BYTE $44$ DUP$(?)$ ; input buffer to store and process course code

byteCount DWORD $?$ ; holds course code length as read from keyboard

; holds course score as read from keyboard

ipCountr DWORD $0$ ; counter for courses

; Messages to be displayed

prompt$3$ BYTE "Enter a ipV$4$ address", $0$

HeadingA BYTE "The ip address List $",0$

$.$code

main PROC

; read And copy $3$ strings

CALL Read$\_$Input

CALL Print$\_$ips

exit

main ENDP

Read$\_$Input PROC

mov ipCountr, $0$

GET$\_$CC:

READ$\_$ip:

MOV EDX,OFFSET prompt$3$

CALL WriteString

mov edx,OFFSET buffer ; point to the buffer

mov ecx,SIZEOF buffer ; specify max characters

CALL ReadString ; input the string

mov byteCount,eax ; number of characters

mov esi,offset buffer

call chk$\_$ipv$4\_$format

cmp eax, $0$

CALL Crlf

JE READ$\_$ip

jmp COPY$\_$ip

mov esi,$0$

COPY$\_$ip:

mov ebx,ipCountr

imul ebx,ebx,CD$\_$LEN

add ebx,esi

mov al$,$ buffer$[$esi$]$

mov CCA$[$ebx$],$ al

INC esi

cmp al$,0$ ; Jump if equal $($bl $=0)$

JNE COPY$\_$CC

jmp finish

finish:

mov esi,ipCountr

INC ipCountr

MOV EAX, ipCountr

cmp EAX, $3$

JL GET$\_$CC

Read$\_$Input ENDP

;$----------------------------------------------------------------------------------------$

chk$\_$ipv$4\_$format PROC

xor ecx, ecx

validate$\_$ip:

call ReadOctet

cmp eax, $-1$

je invalid$\_$format

mov $[$ipOctets $+$ ecx$],$ al ; Store only the lower byte

inc ecx

inc dword ptr $[$octetsProcessed$]$

mov bl$,[$esi$]$

inc esi

cmp bl$,\text{'}.\text{'}$

je increment$\_$dot

cmp bl$,0$

je finish$\_$validation

jmp invalid$\_$format

increment$\_$dot:

inc dword ptr $[$dotCount$]$

jmp validate$\_$ip

finish$\_$validation:

cmp dword ptr $[$octetsProcessed$],4$

jne invalid$\_$format

cmp dword ptr $[$dotCount$],3$

jne invalid$\_$format

mov eax, $1$

ret

invalid$\_$format:

mov eax, $0$

ret

chk$\_$ipv$4\_$format ENDP

;$----------------------------------------------------------------------------------------$

ReadOctet PROC

xor eax, eax

xor ebx, ebx

read$\_$digit:

mov bl$,[$esi$]$

cmp bl$,\text{'}0\text{'}$

jl invalid$\_$input

cmp bl$,\text{'}9\text{'}$

jg invalid$\_$input

sub bl$,\text{'}0\text{'}$

imul eax, $10$

add eax, ebx

inc esi

mov bl$,[$esi$]$

cmp bl$,\text{'}.\text{'}$

je octet$\_$done

cmp bl$,0$

je octet$\_$done

jmp read$\_$digit

octet$\_$done:

cmp eax, $255$

ja invalid$\_$input

ret

invalid$\_$input:

mov eax, $-1$

ret

ReadOctet ENDP

;$----------------------------------------------------------------------------------------$

Print$\_$ips PROC

mov ipCountr, $0$

PRNT$\_$Crs:

mov esi, $0$

CCA$2$BUFFER:

mov ebx,ipCountr

imul ebx,ebx,CD$\_$LEN

add ebx,esi

mov al$,$ CCA$[$ebx$]$

mov buffer$[$esi$],$al

INC esi

cmp esi, CD$\_$LEN ; Jump if not equal $($esi $!=$ CD$\_$LEN$)$

JNE CCA$2$BUFFER

mov buffer$[$esi$],0$

mov EDX, offset buffer

CALL WriteString

call crlf

INC ipCountr

MOV EAX, ipCountr

cmp EAX, $3$ ; Jump if less $($EAX $<3)$

JL PRNT$\_$Crs

Print$\_$ips ENDP correct that code to be output like this

END mainoEnter the IPv$4$ Address $($xxx$.$xxx$.$xxx$.$xxx$)$: $127\mathrm{.}255\mathrm{.}255\mathrm{.}255.$

Error, IPv$4$ address is not formatted correctly. Try again!

Enter the IPv$4$ Address $($xxx$.$xxx$.$xxx$.$xxx$)$: $127\mathrm{.}255\mathrm{.}255\mathrm{.}256$

Error, IPv$4$ address is not formatted correctly. Try again!

Enter the IPv$4$ Address $($xxx$.$xxx$.$xxx$.$xxx$)$: $127\mathrm{.}255\mathrm{.}255\mathrm{.}255$

Enter the IPv$4$ Address $($xxx$.$xxx$.$xxx$.$xxx$)$: $191\mathrm{.}255\mathrm{.}255\mathrm{.}255$

Enter the IPv$4$ Address $($xxx$.$xxx$.$xxx$.$xxx$)$: $223\mathrm{.}255\mathrm{.}255\mathrm{.}255$

Enter the IPv$4$ Address $($xxx$.$xxx$.$xxx$.$xxx$)$: $239\mathrm{.}255\mathrm{.}255\mathrm{.}255$

Enter the IPv$4$ Address $($xxx$.$xxx$.$xxx$.$xxx$)$: $240\mathrm{.}255\mathrm{.}255\mathrm{.}255$

Enter the IPv$4$ Address $($xxx$.$xxx$.$xxx$.$xxx$)$: $00189\mathrm{.}234\mathrm{.}23\mathrm{.}32$

IPv$4$ Address

$--------------------------------$

$127\mathrm{.}255\mathrm{.}255\mathrm{.}255$

$191\mathrm{.}255\mathrm{.}255\mathrm{.}255$

$223\mathrm{.}255\mathrm{.}255\mathrm{.}255$

$239\mathrm{.}255\mathrm{.}255\mathrm{.}255$

$240\mathrm{.}255\mathrm{.}255\mathrm{.}255$

$189\mathrm{.}234\mathrm{.}23\mathrm{.}32$