blob: 2ddf7675aa1cf8b79884f34de524f43a63132b2e (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
|
#ifndef _INET_ECN_H_
#define _INET_ECN_H_
#include <linux/config.h>
#ifdef CONFIG_INET_ECN
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)
#else
#define INET_ECN_is_ce(x...) (0)
#define INET_ECN_is_not_ce(x...) (0)
#define INET_ECN_is_capable(x...) (0)
#define INET_ECN_encapsulate(x, y) (x)
#define IP6_ECN_flow_init(x...) do { } while (0)
#define IP6_ECN_flow_xmit(x...) do { } while (0)
#define INET_ECN_xmit(x...) do { } while (0)
#define INET_ECN_dontxmit(x...) do { } while (0)
#endif
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
|
