Clutch Problems.

All my fluid will leak out of my clutch master cylinder in one day. A buddy put my truck on a lift, i guess where the clutch meets the fork down by the tranny, there is a peice of foam? When he squeezed on the Foam,he said it leaked fluid everywhere. I asked another buddy what this could be, he said it is the clutch slave cylinder. Does this sound familiar to anyone, and how easy is it to fix? My truck is a 98 chevy S10, 2.2 liter.

I obviously dont know much about this, can anyone with a similair problem, help me out?

Thanks,todd