Well, it all comes down to when this happens ! If this was to happen say next year, then you got it right. IN won't be able to do much and just attack your convoys to deplete you of your supplies. Since as of today, IN is no match for the French Navy, you know that and so does the whole world.
If this was to happen 10 years later, say in 2021, well then that's a different ball game all together ! With estimated 2-3 carriers, 2-3 N-subs armed with the K-15 and the K-4 missile with a range of 3500 kms, substantial naval air arm, MRCAs which may be your own Rafales, FGFAs, the Agni-5, RTA we are developing with the Russians, Brahmos-3 & Barak-8 equipped destroyers and frigates, P-8I, carrier based AWACS and numerous land based AWACS, including IL-76 Phalcons and Embraer AWACS, our own ABM shield, the Shaurya cruise missiles aboard IN ships and IAF aircrafts, our own defense satellite, Gagan GPS equipped aircrafts and ships, it will be a nightmare for your navy !