[Icecast] streaming legal issues

[ferran fabregas]

Hi! anybody knows where can i find some info about the legality of do
a streaming of copyrighted music? can i make a audio stream with my
legaly-brought music from my home to listen into my workplace? can i
open it to the world?

what are the legal terms that applies the thousands of internet radio
broadcasts that exists on the net?

if anybody knows the answers, or where i can find it, i will be regarded.

thanks

ferran