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#ifndef _INET_ECN_H_

#define _INET_ECN_H_

static inline int INET_ECN_is_ce(__u8 dsfield)

{

        return (dsfield&3) == 3;

}

static inline int INET_ECN_is_not_ce(__u8 dsfield)

{

        return (dsfield&3) == 2;

}

static inline int INET_ECN_is_capable(__u8 dsfield)

{

        return (dsfield&2);

}

static inline __u8 INET_ECN_encapsulate(__u8 outer, __u8 inner)

{

        outer &= ~3;

        if (INET_ECN_is_capable(inner))

                outer |= (inner & 3);

        return outer;

}

#define INET_ECN_xmit(sk) do { (sk)->protinfo.af_inet.tos |= 2; } while (0)

#define INET_ECN_dontxmit(sk) do { (sk)->protinfo.af_inet.tos &= ~3; } while (0)

#define IP6_ECN_flow_init(label) do {   \

      (label) &= ~htonl(3<<20);         \

    } while (0)

#define IP6_ECN_flow_xmit(sk, label) do {                       \

        if (INET_ECN_is_capable((sk)->protinfo.af_inet.tos))    \

                (label) |= __constant_htons(2 << 4);            \

    } while (0)

static inline void IP_ECN_set_ce(struct iphdr *iph)

{

        u32 check = iph->check;

        check += __constant_htons(0xFFFE);

        iph->check = check + (check>=0xFFFF);

        iph->tos |= 1;

}

struct ipv6hdr;

static inline void IP6_ECN_set_ce(struct ipv6hdr *iph)

{

        *(u32*)iph |= htonl(1<<20);

}

#define ip6_get_dsfield(iph) ((ntohs(*(u16*)(iph)) >> 4) & 0xFF)

#endif