Problem $3$ Network Masking

An Internet Protocol version $4($IPv$4)$ address is represented in dotted decimal notation. Here is an example of an IPv$4$ address for an end$-$point:

$192\mathrm{.}168\mathrm{.}1\mathrm{.}8$

The IPv$4$ addressing scheme also requires a mask associated with each subnet. The mask is used to find the network address. The network address is essentially the base address of the network and is used for routing and switching. For example, suppose the mask for the above address is $255\mathrm{.}255\mathrm{.}0\mathrm{.}0.$ The mask indicates that the two rightmost octets are masked, since those bits are all turned off. So our network address is $192\mathrm{.}168\mathrm{.}0\mathrm{.}0.$ An IPv$4$ address conveniently fits into a DWORD. Let$$s look at all this in hex:

IP Address: $192\mathrm{.}168\mathrm{.}1\mathrm{.}8=0$xC$0$A$80108$

Subnet Mask: $255\mathrm{.}255\mathrm{.}0\mathrm{.}0=0$xFFFF$0000$

Network Address: $192\mathrm{.}168\mathrm{.}0\mathrm{.}0=0$xC$0$A$80000$

As you can see, an IP address can be represented in hex by simply concatenating the hex byte representation for each octet.

Write a complete, yet simple, x$86$ assembly program that can mask an IP address to produce the network address. I recommend using a console$32$ template. Develop a procedure that can mask an IP address to produce the network address. Create the function with the following prototype:

DWORD getNetAddress$($DWORD ipAddress, DWORD subnetMask$)$;

The function consumes two DWORD parameters: the IP address and the subnet mask. The function returns the network address as a DWORD. Your program simply needs to define and call the procedure. Check your function$$s return value $($in EAX$),$ and provide screenshots of your registers to verify the accuracy of the function$$s return value.

the code i was provided earlier did not work. I$\text{'}$m coding in VS win$32,64.$ All of my code starts with

$\mathrm{.}386$

a samp$[$lpe partial code $-$

$\mathrm{.}586$

$.$MODEL FLAT

INCLUDE io$.$h ; header file for input$/$output

$.$STACK $4096$

$.$DATA

valueA DWORD $?$

valueB DWORD $?$

valueC DWORD $?$

prompt$1$ BYTE "Value of a$?",0$

prompt$2$ BYTE "Value of b$?($not zero$)",0$

prompt$3$ BYTE "Value of c$?",0$

string BYTE $40$ DUP $(?)$

result BYTE $11$ DUP $(?),0$

resultLbl BYTE "Expression value", $0$

$.$CODE

$\_$MainProc PROC