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main.c (20494, 2017-04-25)

# Packet Capture And Analysis using C Code written in partial fulfilment of **Course Computer Networks (CS F303). BITS Pilani, Pilani Campus. (Jan-May 2017)** It currently works only in **Linux** based systems. It is tested in **Ubuntu 17.04** but should work fine with older versions of Ubuntu also. ### To Compile and run the program #### To Compile ``` gcc main.c -o capture ``` #### To Run ``` sudo ./capture ``` *Note: The program needs sudo permission for opening the sock to capture packets* ### Running the Program * In the beginning the program will ask you to enter a file name where it should print the details of the packets captured. Enter any file name here (eg. log.txt) * Then it will ask for number of packets to be captured for analysis * Then it will start capturing and once the desired number of packets are captured, Analysis prompt will be given to user. ### The Program gives following Options for analysis 1. Print all captured packets > It prints the details of all the packets that are captured 2. Filter packets 1. Filter by MAC address > Gives a list of all MAC addresses whose packets were captured. You can select > any one MAC address to filter. 2. Filter by IP > Gives a list of all IP addresses whose packets were captured. You can select > any one IP address to filter. 3. Filter by Protocol > You can select to filter only HTTP or FTP packets that were captured 4. Back to main menu 3. Display Network Traffic Graph > Creates "Number of packets captured vs Time" graph using gnuplot > *Note: **gnuplot** must be installed in your system for this option to work* . > To install **gnuplot** in ubuntu run ```sudo apt-get install gnuplot``` 4. Exit

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