Explain how Ishmael is injured, and where. Also, what does his recovery consist of? (Chapter 17)

From the text:

I was hit three times on my left foot. The first two bullets went in and out, and the last one stayed inside my foot. I couldn't walk, so I lay on the ground and shot into the bush where the bullets that hit me had come from. I released the entire round of the magazine into that one area.