readit
int (*readit)(caddr_t, caddr_t, int);
int (*readit)(caddr_t, caddr_t, int), /* like read, but pass it a
rstrm->readit = readit;
n = rstrm->readit(rstrm->tcp_handle, rstrm->in_hdrp,
n = rstrm->readit(rstrm->tcp_handle,
if ((len = (*(rstrm->readit))(rstrm->tcp_handle, where, len)) == -1)
size = readit(file, &dp, convert, segment_size);
int readit(FILE *, struct tftphdr **, int, int);