readit
int (*readit)(char *, char *, int);
int (*readit)(char *, char *, int),
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, tftp_blksize, pf->f_convert);
size = readit(file, &dp, blksize, convert);
int readit(FILE *, struct tftphdr **, size_t, int);