RPC-Calculator

A calculator console app to utilize remote procedure calls implemented with Sun RPC (rpcgen)

Installation and Tests

This RPC program is compiled using Sun RPC (rpcbind)

Commands to install:

sudo apt-get install rpcbind
rpcinfo
	(rpcinfo command is for checking the installation)

Commands used for RPC generation from the main file calc.x:

rpcgen -a -C calc.x
make -f Makefile.calc
sudo ./calc_server

Open another Terminal and run sudo ./calc_client localhost [operations in postfix syntax]

Example test codes

Example 1 Call: (basic operation)

sudo ./calc_client localhost 10 20 x

Example 1 Server:

mul(10, 20) is called

Example 1 Client:

Inserting 10
Inserting 20
Removing 20
Removing 10
Result: 200
Inserting 200

Example 2 Call: (complex operation)

sudo ./calc_client localhost 10 20 x 35 - 44 +

Example 2 Server:

mul(10, 20) is called
sub(200, 35) is called
add(165, 44) is called

Example 2 Client:

Inserting 10
Inserting 20
Removing 20
Removing 10
Result: 200
Inserting 200
Inserting 35
Removing 35
Removing 200
Result: 165
Inserting 165
Inserting 44
Removing 44
Removing 165
Result: 209
Inserting 209

Example 3 Call: (invalid input type error test)

sudo ./calc_client localhost 10 20 asd

Example 3 Server:

(nothing)

Example 3 Client:

Inserting 10
Inserting 20
Please enter a valid input and try again.

Example 4 Call: (missing arguments input error test)

sudo ./calc_client localhost 10

Example 4 Server:

(nothing)

Example 4 Client:

usage: ./calc_client server_host [expression without whitespace] [operation] [expression without whitespace]

Example 5 Call: (division with 0 handling. Handled in server since if it someone meddles with the client code and sends such a request to the server, the server crashes. Has to be on the server side. Divides with 1 instead.)

sudo ./calc_client localhost 10 0 /

Example 5 Server:

You have tried a zero division. Do not trust the output (it's divided by 1) and please don't try to divide something with 0.

Example 5 Client:

Inserting 10
Inserting 0
Removing 0
Removing 10
Result: 10
Inserting 10

Example 6 Call: (unnecessary amount of operations being called error test)

sudo ./calc_client localhost 102 + +

Example 6 Server:

(nothing)

Example 6 Client:

Inserting 102
Removing 102
Underflow
Program Terminated