CCP_OPT_LENGTH
|| clen < CCP_HDRLEN + CCP_OPT_LENGTH(dp + CCP_HDRLEN))
cp->state = (*comp)->decomp_alloc(dp, CCP_OPT_LENGTH(dp));
clen >= CCP_HDRLEN + CCP_OPT_LENGTH(dp + CCP_HDRLEN)) {