ists the TCP ports that are open on a given target machine. (An open port is a port number that a machine is actively listening on.) The program requirements are as follows:  The program accepts on the command line the following arguments: o The IP address of the target machine. o Two integers (separated by space) representing the lower and the upper port numbers between which port numbers need to be scanned. For example, a command line similar to the following ./program_name 1.2.3.4 1 20000 means that your program should find and list all open TCP ports on the machine with IP address 1.2.3.4 in the range from 1 to 20000, inclusive. o If the target is up and running, the program’s output should look similar to the following Open TCP ports on ‘1.2.3.4’ are: 1 7 9 13 19 22 37 80 111 8090 o The program needs also to report whether the target machine is down or unreachable.  Write your OWN code. You are not allowed to use libraries or tools developed by any third party. Hints: To determine whether a given machine has a specific TCP open port number, your client will try to establish a connection to that machine on the specific port number, and determine whether it is open or not based on whether the connection is successful; and if not, on the error occurring

Computer Networking: A Top-Down Approach (7th Edition)

7th Edition

ISBN:9780133594140

Author:James Kurose, Keith Ross

Publisher:James Kurose, Keith Ross

Chapter1: Computer Networks And The Internet

Section: Chapter Questions

Problem R1RQ: What is the difference between a host and an end system? List several different types of end...

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You need to write a C program that lists the TCP ports that are open on a given target machine. (An open port is a port number that a machine is actively listening on.) The program requirements are as follows:  The program accepts on the command line the following arguments: o The IP address of the target machine. o Two integers (separated by space) representing the lower and the upper port numbers between which port numbers need to be scanned. For example, a command line similar to the following ./program_name 1.2.3.4 1 20000 means that your program should find and list all open TCP ports on the machine with IP address 1.2.3.4 in the range from 1 to 20000, inclusive. o If the target is up and running, the program’s output should look similar to the following Open TCP ports on ‘1.2.3.4’ are: 1 7 9 13 19 22 37 80 111 8090 o The program needs also to report whether the target machine is down or unreachable.  Write your OWN code. You are not allowed to use libraries or tools developed by any third party. Hints: To determine whether a given machine has a specific TCP open port number, your client will try to establish a connection to that machine on the specific port number, and determine whether it is open or not based on whether the connection is successful; and if not, on the error occurring

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