#include "lwip/opt.h"
#include "lwip/opt.h"
#include "lwip/pbuf.h"
#include "lwip/pbuf.h"
#include "lwip/ip6_addr.h"
#include "lwip/ip6_addr.h"
#include "lwip/netif.h"
#include "lwip/netif.h"
#define LWIP_HDR_ND6_PRIV_H
#define ND6_HOPLIM 255 /* maximum hop limit, required in all ND packets */
#define ND6_2HRS 7200 /* two hours, expressed in number of seconds */