xt_compat_add_offset
int xt_compat_add_offset(u_int8_t af, unsigned int offset, int delta);
ret = xt_compat_add_offset(NFPROTO_BRIDGE, entry_offset, off);
ret = xt_compat_add_offset(NFPROTO_BRIDGE, offset, new_offset);
ret = xt_compat_add_offset(NFPROTO_ARP, entry_offset, off);
ret = xt_compat_add_offset(NFPROTO_ARP, entry_offset, off);
ret = xt_compat_add_offset(AF_INET, entry_offset, off);
ret = xt_compat_add_offset(AF_INET, entry_offset, off);
ret = xt_compat_add_offset(AF_INET6, entry_offset, off);
ret = xt_compat_add_offset(AF_INET6, entry_offset, off);
EXPORT_SYMBOL_GPL(xt_compat_add_offset);