SYSTEMS PROGRAMMING

You will create a text file and then validate the content of the files by using grep, wc commands.

1. Create a text file and name it as test.txt using fopen library function. Marks 20

2. Write the following ethreal trace to the text file using fprintf library function. Marks 60

For example, the test.txt file will store the above information as follows:

1 0.00000 192.168.1.213 173.199.38.122 UDP Source port: 59218 Destination port: 1853

....

15 0.122071 192.168.1.213 68.64.25.147 TCP 59418 > https [ACK] Seq=657 Ack = 138

3. Finally, open the terminal and run either grep or wc command using the test.txt and answer the following question: Marks 20

1. Which ip address occurs most frequently in that test.txt file? How did you find it?
2. Which protocol occurs most frequently in that test.txt file? How did you find it?

Please attach the screenshots of your code and explanations of the above 1,2,3 questions.

Eile Edit View Go Capture Analyze Statistics Help CE O Filter: Expression... Clear Apply No. Protocol Time Source 1 0.000000 192.168.1. 213 2 0.017427 173.199. 38.122 3 0.017515 192.168.1. 213 4 0.033649 173.199.38.122 5 0.041488 192.168.1. 213 6 0.052573 173.199. 38.122 7 0.057528 68.64.25.147 8 0.057529 68.64.25.147 9 0.072850 173.199. 38.122 10 0.077788 192.168.1.213 11 0.081116 68.64.25.147 12 0.093665 173.199.38.122 13 0.102314 192.168.1. 213 14 0.119985 192.168.1. 213 15 0.122071 192.168.1.213 Destination 173.199.38.122 192.168.1. 213 173.199.38.122 192.168.1. 213 173.199. 38.122 192.168.1. 213 192.168.1. 213 192.168.1. 213 192.168.1. 213 173.199. 38.122 192.168.1.213 192.168.1. 213 173.199. 38.122 173.199. 38.122 68.64.25.147 UDP UDP UDP UDP UDP UDP TCP TCP UDP UDP SSL UDP UDP UDP TCP Info Source port: 59218 Destination port: 1853 Source port: 1853 Destination port: 59218 Source port: 59218 Destination port: 1853 Source port: 1853 Destination port: 59218 Source port: 59218 Destination port: 1853 Source port: 1853 Destination port: 59218 https > 59418 [ACK] Seq=0 Ack=0 win=5488 Len=0 https > 59418 [ACK] Seq=0 Ack=657 win=5488 Len=0 Source port: 1853 Destination port: 59218 Source port: 59218 Destination port: 1853 Continuation Data Source port: 1853 Destination port: 59218 Source port: 59218 Destination port: 1853 Source port: 59218 Destination port: 1853 59418 > https Tackl Sed=657 Ack=138 win=513 Len=0