ip_ecn.c revision 1.2.2.3
1 1.2.2.3 thorpej /* $NetBSD: ip_ecn.c,v 1.2.2.3 1999/08/02 22:34:58 thorpej Exp $ */ 2 1.2.2.3 thorpej 3 1.2.2.2 thorpej /* 4 1.2.2.2 thorpej * Copyright (C) 1999 WIDE Project. 5 1.2.2.2 thorpej * All rights reserved. 6 1.2.2.2 thorpej * 7 1.2.2.2 thorpej * Redistribution and use in source and binary forms, with or without 8 1.2.2.2 thorpej * modification, are permitted provided that the following conditions 9 1.2.2.2 thorpej * are met: 10 1.2.2.2 thorpej * 1. Redistributions of source code must retain the above copyright 11 1.2.2.2 thorpej * notice, this list of conditions and the following disclaimer. 12 1.2.2.2 thorpej * 2. Redistributions in binary form must reproduce the above copyright 13 1.2.2.2 thorpej * notice, this list of conditions and the following disclaimer in the 14 1.2.2.2 thorpej * documentation and/or other materials provided with the distribution. 15 1.2.2.2 thorpej * 3. Neither the name of the project nor the names of its contributors 16 1.2.2.2 thorpej * may be used to endorse or promote products derived from this software 17 1.2.2.2 thorpej * without specific prior written permission. 18 1.2.2.2 thorpej * 19 1.2.2.2 thorpej * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 20 1.2.2.2 thorpej * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 1.2.2.2 thorpej * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 1.2.2.2 thorpej * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 23 1.2.2.2 thorpej * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 1.2.2.2 thorpej * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 1.2.2.2 thorpej * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 1.2.2.2 thorpej * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 1.2.2.2 thorpej * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 1.2.2.2 thorpej * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 1.2.2.2 thorpej * SUCH DAMAGE. 30 1.2.2.2 thorpej * 31 1.2.2.3 thorpej * KAME Id: ip_ecn.c,v 1.1.4.2 1999/07/30 10:20:02 itojun Exp 32 1.2.2.2 thorpej */ 33 1.2.2.2 thorpej /* 34 1.2.2.2 thorpej * ECN consideration on tunnel ingress/egress operation. 35 1.2.2.2 thorpej * http://www.aciri.org/floyd/papers/draft-ipsec-ecn-00.txt 36 1.2.2.2 thorpej */ 37 1.2.2.2 thorpej 38 1.2.2.2 thorpej #if (defined(__FreeBSD__) && __FreeBSD__ >= 3) || defined(__NetBSD__) 39 1.2.2.2 thorpej #include "opt_inet.h" 40 1.2.2.2 thorpej #endif 41 1.2.2.2 thorpej 42 1.2.2.2 thorpej #include <sys/param.h> 43 1.2.2.2 thorpej #include <sys/systm.h> 44 1.2.2.2 thorpej #include <sys/malloc.h> 45 1.2.2.2 thorpej #include <sys/mbuf.h> 46 1.2.2.2 thorpej #include <sys/errno.h> 47 1.2.2.2 thorpej 48 1.2.2.2 thorpej #ifdef INET 49 1.2.2.2 thorpej #include <netinet/in.h> 50 1.2.2.2 thorpej #include <netinet/in_systm.h> 51 1.2.2.2 thorpej #include <netinet/ip.h> 52 1.2.2.2 thorpej #endif 53 1.2.2.2 thorpej 54 1.2.2.2 thorpej #ifdef INET6 55 1.2.2.2 thorpej #ifndef INET 56 1.2.2.2 thorpej #include <netinet/in.h> 57 1.2.2.2 thorpej #endif 58 1.2.2.2 thorpej #include <netinet/ip6.h> 59 1.2.2.2 thorpej #endif 60 1.2.2.2 thorpej 61 1.2.2.2 thorpej #include <netinet/ip_ecn.h> 62 1.2.2.2 thorpej 63 1.2.2.2 thorpej /* 64 1.2.2.2 thorpej * modify outer ECN (TOS) field on ingress operation (tunnel encapsulation). 65 1.2.2.2 thorpej * call it after you've done the default initialization/copy for the outer. 66 1.2.2.2 thorpej */ 67 1.2.2.2 thorpej void 68 1.2.2.2 thorpej ip_ecn_ingress(mode, outer, inner) 69 1.2.2.2 thorpej int mode; 70 1.2.2.2 thorpej u_int8_t *outer; 71 1.2.2.2 thorpej u_int8_t *inner; 72 1.2.2.2 thorpej { 73 1.2.2.2 thorpej if (!outer || !inner) 74 1.2.2.2 thorpej panic("NULL pointer passed to ip_ecn_ingress"); 75 1.2.2.2 thorpej 76 1.2.2.2 thorpej switch (mode) { 77 1.2.2.2 thorpej case ECN_ALLOWED: /* ECN allowed */ 78 1.2.2.2 thorpej *outer &= ~IPTOS_CE; 79 1.2.2.2 thorpej break; 80 1.2.2.2 thorpej case ECN_FORBIDDEN: /* ECN forbidden */ 81 1.2.2.2 thorpej *outer &= ~(IPTOS_ECT | IPTOS_CE); 82 1.2.2.2 thorpej break; 83 1.2.2.2 thorpej case ECN_NOCARE: /* no consideration to ECN */ 84 1.2.2.2 thorpej break; 85 1.2.2.2 thorpej } 86 1.2.2.2 thorpej } 87 1.2.2.2 thorpej 88 1.2.2.2 thorpej /* 89 1.2.2.2 thorpej * modify inner ECN (TOS) field on egress operation (tunnel decapsulation). 90 1.2.2.2 thorpej * call it after you've done the default initialization/copy for the inner. 91 1.2.2.2 thorpej */ 92 1.2.2.2 thorpej void 93 1.2.2.2 thorpej ip_ecn_egress(mode, outer, inner) 94 1.2.2.2 thorpej int mode; 95 1.2.2.2 thorpej u_int8_t *outer; 96 1.2.2.2 thorpej u_int8_t *inner; 97 1.2.2.2 thorpej { 98 1.2.2.2 thorpej if (!outer || !inner) 99 1.2.2.2 thorpej panic("NULL pointer passed to ip_ecn_egress"); 100 1.2.2.2 thorpej 101 1.2.2.2 thorpej switch (mode) { 102 1.2.2.2 thorpej case ECN_ALLOWED: 103 1.2.2.2 thorpej if (*outer & IPTOS_CE) 104 1.2.2.2 thorpej *inner |= IPTOS_CE; 105 1.2.2.2 thorpej break; 106 1.2.2.2 thorpej case ECN_FORBIDDEN: /* ECN forbidden */ 107 1.2.2.2 thorpej case ECN_NOCARE: /* no consideration to ECN */ 108 1.2.2.2 thorpej break; 109 1.2.2.2 thorpej } 110 1.2.2.2 thorpej } 111 1.2.2.2 thorpej 112 1.2.2.2 thorpej #ifdef INET6 113 1.2.2.2 thorpej void 114 1.2.2.2 thorpej ip6_ecn_ingress(mode, outer, inner) 115 1.2.2.2 thorpej int mode; 116 1.2.2.2 thorpej u_int32_t *outer; 117 1.2.2.2 thorpej u_int32_t *inner; 118 1.2.2.2 thorpej { 119 1.2.2.2 thorpej u_int8_t outer8, inner8; 120 1.2.2.2 thorpej 121 1.2.2.2 thorpej if (!outer || !inner) 122 1.2.2.2 thorpej panic("NULL pointer passed to ip6_ecn_ingress"); 123 1.2.2.2 thorpej 124 1.2.2.2 thorpej outer8 = (ntohl(*outer) >> 20) & 0xff; 125 1.2.2.2 thorpej inner8 = (ntohl(*inner) >> 20) & 0xff; 126 1.2.2.2 thorpej ip_ecn_ingress(mode, &outer8, &inner8); 127 1.2.2.2 thorpej *outer &= ~htonl(0xff << 20); 128 1.2.2.2 thorpej *outer |= htonl((u_int32_t)outer8 << 20); 129 1.2.2.2 thorpej } 130 1.2.2.2 thorpej 131 1.2.2.2 thorpej void 132 1.2.2.2 thorpej ip6_ecn_egress(mode, outer, inner) 133 1.2.2.2 thorpej int mode; 134 1.2.2.2 thorpej u_int32_t *outer; 135 1.2.2.2 thorpej u_int32_t *inner; 136 1.2.2.2 thorpej { 137 1.2.2.2 thorpej u_int8_t outer8, inner8; 138 1.2.2.2 thorpej 139 1.2.2.2 thorpej if (!outer || !inner) 140 1.2.2.2 thorpej panic("NULL pointer passed to ip6_ecn_egress"); 141 1.2.2.2 thorpej 142 1.2.2.2 thorpej outer8 = (ntohl(*outer) >> 20) & 0xff; 143 1.2.2.2 thorpej inner8 = (ntohl(*inner) >> 20) & 0xff; 144 1.2.2.2 thorpej ip_ecn_egress(mode, &outer8, &inner8); 145 1.2.2.2 thorpej *inner &= ~htonl(0xff << 20); 146 1.2.2.2 thorpej *inner |= htonl((u_int32_t)inner8 << 20); 147 1.2.2.2 thorpej } 148 1.2.2.2 thorpej #endif 149
Indexes created Thu Oct 23 22:10:10 GMT 2025