How long until I can play rugby again, after a broken ankle and torn ligaments?

Hi guys, I suffered a broken ankle during a rugby game. It was one of those horror injuries where my ankle was bent in the opposite direction. I've been in a cast and on crutches for just over a month now, and will have my knee cast taken off and start physio next week. I thought I might add, I am a student and obviously that affects the time in which it heals.