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 $ */
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1/* $FreeBSD: head/sys/netinet/ip_ecn.c 78064 2001-06-11 12:39:29Z ume $ */
2/* $KAME: ip_ecn.c,v 1.11 2001/05/03 16:09:29 itojun 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:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the project nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 */
33/*
34 * ECN consideration on tunnel ingress/egress operation.
35 * http://www.aciri.org/floyd/papers/draft-ipsec-ecn-00.txt
36 */
37
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
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46#ifdef INET
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46#include <netinet/in.h>
47#include <netinet/in_systm.h>
48#include <netinet/ip.h>
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50#endif
51
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49#ifdef INET6
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53#ifndef INET
54#include <netinet/in.h>
55#endif
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50#include <netinet/ip6.h>
51#endif
52
53#include <netinet/ip_ecn.h>
54#ifdef INET6
55#include <netinet6/ip6_ecn.h>
56#endif
57
58/*
59 * modify outer ECN (TOS) field on ingress operation (tunnel encapsulation).
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66 * call it after you've done the default initialization/copy for the outer.
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60 */
61void
62ip_ecn_ingress(mode, outer, inner)
63 int mode;
64 u_int8_t *outer;
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72 u_int8_t *inner;
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| 65 const u_int8_t *inner; |
66{
67 if (!outer || !inner)
68 panic("NULL pointer passed to ip_ecn_ingress");
69
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| 70 *outer = *inner; |
71 switch (mode) {
72 case ECN_ALLOWED: /* ECN allowed */
73 *outer &= ~IPTOS_CE;
74 break;
75 case ECN_FORBIDDEN: /* ECN forbidden */
76 *outer &= ~(IPTOS_ECT | IPTOS_CE);
77 break;
78 case ECN_NOCARE: /* no consideration to ECN */
79 break;
80 }
81}
82
83/*
84 * modify inner ECN (TOS) field on egress operation (tunnel decapsulation).
|
91 * call it after you've done the default initialization/copy for the inner.
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85 */
86void
87ip_ecn_egress(mode, outer, inner)
88 int mode;
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96 u_int8_t *outer;
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| 89 const u_int8_t *outer; |
90 u_int8_t *inner;
91{
92 if (!outer || !inner)
93 panic("NULL pointer passed to ip_ecn_egress");
94
95 switch (mode) {
96 case ECN_ALLOWED:
97 if (*outer & IPTOS_CE)
98 *inner |= IPTOS_CE;
99 break;
100 case ECN_FORBIDDEN: /* ECN forbidden */
101 case ECN_NOCARE: /* no consideration to ECN */
102 break;
103 }
104}
105
106#ifdef INET6
107void
108ip6_ecn_ingress(mode, outer, inner)
109 int mode;
110 u_int32_t *outer;
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118 u_int32_t *inner;
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| 111 const u_int32_t *inner; |
112{
113 u_int8_t outer8, inner8;
114
115 if (!outer || !inner)
116 panic("NULL pointer passed to ip6_ecn_ingress");
117
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125 outer8 = (ntohl(*outer) >> 20) & 0xff;
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118 inner8 = (ntohl(*inner) >> 20) & 0xff;
119 ip_ecn_ingress(mode, &outer8, &inner8);
120 *outer &= ~htonl(0xff << 20);
121 *outer |= htonl((u_int32_t)outer8 << 20);
122}
123
124void
125ip6_ecn_egress(mode, outer, inner)
126 int mode;
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135 u_int32_t *outer;
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| 127 const u_int32_t *outer; |
128 u_int32_t *inner;
129{
130 u_int8_t outer8, inner8;
131
132 if (!outer || !inner)
133 panic("NULL pointer passed to ip6_ecn_egress");
134
135 outer8 = (ntohl(*outer) >> 20) & 0xff;
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144 inner8 = (ntohl(*inner) >> 20) & 0xff;
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136 ip_ecn_egress(mode, &outer8, &inner8);
137 *inner &= ~htonl(0xff << 20);
138 *inner |= htonl((u_int32_t)inner8 << 20);
139}
140#endif
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