On Mon, 2010-06-28 at 22:15 -0700, Jeff Newmiller wrote: > Looks like a nonstandard typedef for an unsigned 32-bit integer. The actual typedef would generally be compiler-specific, but > > typedef unsigned int u_int32; > > would probably work on any linux computer. Actually, you'd probably want to use the standard unsigned 32-bit integer type: uint32_t.