1/* $FreeBSD: head/sys/netinet/ip_ecn.c 62587 2000-07-04 16:35:15Z itojun $ */
2/* $KAME: ip_ecn.c,v 1.7 2000/05/05 11:00:56 sumikawa Exp $ */
3
4/*
5 * Copyright (C) 1999 WIDE Project.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:

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38#include "opt_inet.h"
39#include "opt_inet6.h"
40
41#include <sys/param.h>
42#include <sys/systm.h>
43#include <sys/mbuf.h>
44#include <sys/errno.h>
45
46#ifdef INET
47#include <netinet/in.h>
48#include <netinet/in_systm.h>
49#include <netinet/ip.h>
50#endif
51
52#ifdef INET6
53#ifndef INET
54#include <netinet/in.h>
55#endif
56#include <netinet/ip6.h>
57#endif
58
59#include <netinet/ip_ecn.h>
60#ifdef INET6
61#include <netinet6/ip6_ecn.h>
62#endif
63
64/*
65 * modify outer ECN (TOS) field on ingress operation (tunnel encapsulation).
66 * call it after you've done the default initialization/copy for the outer.
67 */
68void
69ip_ecn_ingress(mode, outer, inner)
70 int mode;
71 u_int8_t *outer;
72 u_int8_t *inner;
73{
74 if (!outer || !inner)
75 panic("NULL pointer passed to ip_ecn_ingress");
76
77 switch (mode) {
78 case ECN_ALLOWED: /* ECN allowed */
79 *outer &= ~IPTOS_CE;
80 break;
81 case ECN_FORBIDDEN: /* ECN forbidden */
82 *outer &= ~(IPTOS_ECT | IPTOS_CE);
83 break;
84 case ECN_NOCARE: /* no consideration to ECN */
85 break;
86 }
87}
88
89/*
90 * modify inner ECN (TOS) field on egress operation (tunnel decapsulation).
91 * call it after you've done the default initialization/copy for the inner.
92 */
93void
94ip_ecn_egress(mode, outer, inner)
95 int mode;
96 u_int8_t *outer;
97 u_int8_t *inner;
98{
99 if (!outer || !inner)
100 panic("NULL pointer passed to ip_ecn_egress");
101
102 switch (mode) {
103 case ECN_ALLOWED:
104 if (*outer & IPTOS_CE)

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110 }
111}
112
113#ifdef INET6
114void
115ip6_ecn_ingress(mode, outer, inner)
116 int mode;
117 u_int32_t *outer;
118 u_int32_t *inner;
119{
120 u_int8_t outer8, inner8;
121
122 if (!outer || !inner)
123 panic("NULL pointer passed to ip6_ecn_ingress");
124
125 outer8 = (ntohl(*outer) >> 20) & 0xff;
126 inner8 = (ntohl(*inner) >> 20) & 0xff;
127 ip_ecn_ingress(mode, &outer8, &inner8);
128 *outer &= ~htonl(0xff << 20);
129 *outer |= htonl((u_int32_t)outer8 << 20);
130}
131
132void
133ip6_ecn_egress(mode, outer, inner)
134 int mode;
135 u_int32_t *outer;
136 u_int32_t *inner;
137{
138 u_int8_t outer8, inner8;
139
140 if (!outer || !inner)
141 panic("NULL pointer passed to ip6_ecn_egress");
142
143 outer8 = (ntohl(*outer) >> 20) & 0xff;
144 inner8 = (ntohl(*inner) >> 20) & 0xff;
145 ip_ecn_egress(mode, &outer8, &inner8);
146 *inner &= ~htonl(0xff << 20);
147 *inner |= htonl((u_int32_t)inner8 << 20);
148}
149#endif