Listing 3. ip_options_compile ()

int
ip_options_compile (struct ip_options *opt,
                    struct sk_buff *skb)
{
unsigned char *pp_ptr;
unsigned char *optptr;

  ...

  case IPOPT_CIPSO:

    if(security_ops->ip_ops->decode_options(skb,
                                    optptr, &pp_ptr)
      goto error;
      break;
  ...
}