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README.md

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Assignment 3 - P1

Submitted to: Dr. Hari Babu
Course: Network Programming IS F462
Submitted by: Kunal Mohta (2017A7PS0148P) & Laksh Singla (2017A7PS0082P)

Design

  • User is given the facility to join and leave a group.
  • User can send notification to a joined group only.
  • I/O Multiplexing using the select() call is used to handle the availability of data from standard input and from all the joined group file descriptors.
  • For sending notification, blocking call for sendto() is required, which is done by creating a child process using fork().
  • For the join and leave group operations, no blocking call is required. Hence, they are carried out as is.

Usage

Compiling and running -

make
./a.out

Supported commands -

// join a group
join <group-name>

// send notification to a group
notify <group-name>

// leave a group
leave <group-name>

// get list of joined groups
joined-groups

Assumptions

  • List of courses is already known and each group has already been assigned a multicast group ip.
  • There can be no additions/deletions to the list of courses while the code is running.
  • Change COURSE_COUNT and course_list when adding/deleting courses.
  • The program is supposed to be run on different machines. If it is run in 2 different terminals on the same machine, then joining a group in 1 terminal would result in it being joined in the other terminal as well.