! Overview: In this assignment, we will use Python to perform various networking-related tasks, including ultimately obtaining the system's Routing Table and comparing it to a user-entered IPv4 address. Submissions: In the Google from, submit Tasks: Follow the guidelines and best practices from previous assignments with a Python programming component. Feel free to reuse code from previous assignments, in particular the one on socket programming. Assignment07.py (Python code) Assignment07.txt (console output). [1] Write a function execute_command(cmd) to execute a windows shell command ("cmd"). See https://stackoverflow.com/questions/14894993/running-window s-shell-commands-with-python [2] Define a function get_routing_table by using the function from the previous step to run "route print" and then parsing the output into a table (2-D list). [3] Prompt the user to enter an IPv4 address in dotted-decimal notation. If the IP address is 0 or empty, this is our cue to quit. Otherwise proceed to ment stop Program Source Code (.cpp, java, .py) * 1 Add file Program Output (.txt) * 1 Add file A copy of your responses will be emailed to the address you provided. 1 Submit Never submit passwords through Google Forms. [4] Define a function validate_address() to validate the address in two ways: reCAPTCHA Call your own function to check that the entered IP address is valid, that is, it consists of four decimal numbers, each between 0 and 255, and separated by dots (periods). Call code from socket package to validate it. See https://stackoverflow.com/questions/319279/how-to-vali date-ip-address-in-python [5] Define a function get_binary_address() to find the binary equivalent of an IP address in dotted decimal notation and use it on the inputted IP address. Clear form [6] Define a function bitwise_and() to do the "bitwise-AND" of two bit-strings. You may either do it by iterating over the characters of the bit-strings, or use binary arithmetic. (See https://wiki.python.org/moin/BitwiseOperators) [7] Define a function get_classful_address_type() to dmetermine its class A thru E. If it is class D or E, tell the user that D is for multicast or E is reserved, and return to step [2]. You can determine the class either directly from the dotted decimal notation or from the leading bits of the binary equivalent. (See https://en.wikipedia.org/wiki/Classful network#Classful addres sing_definition) [8] Define a function get_next_hop() to loop through the rows of the routing table from step [2] and determine the "Next Hop" for the user-inputted address. To determine which row is determinant, use the following algorithm: octets [9] Compare the Next Hop to that provided by Python: from pyroute2 import IPRoute Do a bitwise-AND of the network mask with the destination IP address and see if you have a match with "Network Destination", the first column. Mathematically, this can be expressed at N = D & M where D is the Destination IP address, M is the (network) Mask, and N is the (destination) Network. Use the Metric column to decide between multiple matches (lowest value of Metric gets priority) If you have multiple matches and the Metric column is the same for all, then use the "Longest Prefix Match" to decide between ties, that is the one with more non-zero bits in the Mask. [9] Compare the Next Hop to that provided by Python: from pyroute2 import IPRoute with IPRoute () as ipr: print (ipr.route('get', dst-ipAddress) [10] Output the following information: The original inputted IP (destination) address in dotted-decimal notation The equivalent 32-bit address in binary notation The Class A, B, C, D, or E (the next two bullets apply only to classes A, B, C) The chosen Next Hop for that destination address How that address was chosen - match alone, metric, or longest-prefix match [11] Repeat steps [3] thru [10] until the user enters nothing or just 0 Try your program on the following inputs. If you get tired of typing them in, you can instead read them in from an input file. abc.def.ghi.jkl # not decimal 111-111-111-111 # not dotted 613.613.613.613 # format correct but numbers out of range 123.123.123 # valid numbers but only three - 225.225.225.225 # valid address but class D 241.242.243.244 # valid address but class E 127.0.0.1 # valid loopback address 52.3.73.91 # valid 216.239.63.255 # valid an address for amazon - an address for google