1 #ifndef _INET_ECN_H_ 2 #define _INET_ECN_H_ 3 4 enum { 5 INET_ECN_NOT_ECT = 0, 6 INET_ECN_ECT_1 = 1, 7 INET_ECN_ECT_0 = 2, 8 INET_ECN_CE = 3, 9 INET_ECN_MASK = 3, 10 }; 11 INET_ECN_is_ce(__u8 dsfield)12static inline int INET_ECN_is_ce(__u8 dsfield) 13 { 14 return (dsfield&3) == 3; 15 } 16 INET_ECN_is_not_ce(__u8 dsfield)17static inline int INET_ECN_is_not_ce(__u8 dsfield) 18 { 19 return (dsfield&3) == 2; 20 } 21 INET_ECN_is_capable(__u8 dsfield)22static inline int INET_ECN_is_capable(__u8 dsfield) 23 { 24 return (dsfield&2); 25 } 26 INET_ECN_encapsulate(__u8 outer,__u8 inner)27static inline __u8 INET_ECN_encapsulate(__u8 outer, __u8 inner) 28 { 29 outer &= ~3; 30 if (INET_ECN_is_capable(inner)) 31 outer |= (inner & 3); 32 return outer; 33 } 34 35 #define INET_ECN_xmit(sk) do { (sk)->protinfo.af_inet.tos |= 2; } while (0) 36 #define INET_ECN_dontxmit(sk) do { (sk)->protinfo.af_inet.tos &= ~3; } while (0) 37 38 #define IP6_ECN_flow_init(label) do { \ 39 (label) &= ~htonl(3<<20); \ 40 } while (0) 41 42 #define IP6_ECN_flow_xmit(sk, label) do { \ 43 if (INET_ECN_is_capable((sk)->protinfo.af_inet.tos)) \ 44 (label) |= __constant_htons(2 << 4); \ 45 } while (0) 46 IP_ECN_set_ce(struct iphdr * iph)47static inline void IP_ECN_set_ce(struct iphdr *iph) 48 { 49 u32 check = iph->check; 50 check += __constant_htons(0xFFFE); 51 iph->check = check + (check>=0xFFFF); 52 iph->tos |= 1; 53 } 54 55 struct ipv6hdr; 56 IP6_ECN_set_ce(struct ipv6hdr * iph)57static inline void IP6_ECN_set_ce(struct ipv6hdr *iph) 58 { 59 *(u32*)iph |= htonl(1<<20); 60 } 61 62 #define ip6_get_dsfield(iph) ((ntohs(*(u16*)(iph)) >> 4) & 0xFF) 63 64 #endif 65