inet_ecn.h
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:1k
- #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