Listing 2. dsi_socket_sendmsg()

int dsi_socket_sendmsg(struct socket *sock,
                       struct msghdr *msg, int size)
{
...

inode_security_t *isec;
struck sock sk;
struct ip_options *opt =  NULL;
int optlen = NSID_BASE_LEN + NSID_SSID_LEN +
             NSID_NODEID_LEN; //8 +_6 + 6
unsigned char optptr[optlen];

  ...

  sk = sock->sk;
  opt = sk->protinfo.af_inet.opt;
  dsi_options_fill (isec, optptr, optlen);
  dsi_ip_options_get(&opt, optptr, optlen);
  opt = xchg(&sk->protinfo.af_inet.opt, opt);

...
}