ip_ecn.c revision 1.2.2.2
1 1.2.2.2 thorpej /* 2 1.2.2.2 thorpej * Copyright (C) 1999 WIDE Project. 3 1.2.2.2 thorpej * All rights reserved. 4 1.2.2.2 thorpej * 5 1.2.2.2 thorpej * Redistribution and use in source and binary forms, with or without 6 1.2.2.2 thorpej * modification, are permitted provided that the following conditions 7 1.2.2.2 thorpej * are met: 8 1.2.2.2 thorpej * 1. Redistributions of source code must retain the above copyright 9 1.2.2.2 thorpej * notice, this list of conditions and the following disclaimer. 10 1.2.2.2 thorpej * 2. Redistributions in binary form must reproduce the above copyright 11 1.2.2.2 thorpej * notice, this list of conditions and the following disclaimer in the 12 1.2.2.2 thorpej * documentation and/or other materials provided with the distribution. 13 1.2.2.2 thorpej * 3. Neither the name of the project nor the names of its contributors 14 1.2.2.2 thorpej * may be used to endorse or promote products derived from this software 15 1.2.2.2 thorpej * without specific prior written permission. 16 1.2.2.2 thorpej * 17 1.2.2.2 thorpej * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 18 1.2.2.2 thorpej * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 1.2.2.2 thorpej * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 1.2.2.2 thorpej * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 21 1.2.2.2 thorpej * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 1.2.2.2 thorpej * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 1.2.2.2 thorpej * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 1.2.2.2 thorpej * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 1.2.2.2 thorpej * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 1.2.2.2 thorpej * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 1.2.2.2 thorpej * SUCH DAMAGE. 28 1.2.2.2 thorpej * 29 1.2.2.2 thorpej * $Id: ip_ecn.c,v 1.2.2.2 1999/07/01 23:47:01 thorpej Exp $ 30 1.2.2.2 thorpej */ 31 1.2.2.2 thorpej /* 32 1.2.2.2 thorpej * ECN consideration on tunnel ingress/egress operation. 33 1.2.2.2 thorpej * http://www.aciri.org/floyd/papers/draft-ipsec-ecn-00.txt 34 1.2.2.2 thorpej */ 35 1.2.2.2 thorpej 36 1.2.2.2 thorpej #if (defined(__FreeBSD__) && __FreeBSD__ >= 3) || defined(__NetBSD__) 37 1.2.2.2 thorpej #include "opt_inet.h" 38 1.2.2.2 thorpej #endif 39 1.2.2.2 thorpej 40 1.2.2.2 thorpej #include <sys/param.h> 41 1.2.2.2 thorpej #include <sys/systm.h> 42 1.2.2.2 thorpej #include <sys/malloc.h> 43 1.2.2.2 thorpej #include <sys/mbuf.h> 44 1.2.2.2 thorpej #include <sys/errno.h> 45 1.2.2.2 thorpej 46 1.2.2.2 thorpej #ifdef INET 47 1.2.2.2 thorpej #include <netinet/in.h> 48 1.2.2.2 thorpej #include <netinet/in_systm.h> 49 1.2.2.2 thorpej #include <netinet/ip.h> 50 1.2.2.2 thorpej #endif 51 1.2.2.2 thorpej 52 1.2.2.2 thorpej #ifdef INET6 53 1.2.2.2 thorpej #ifndef INET 54 1.2.2.2 thorpej #include <netinet/in.h> 55 1.2.2.2 thorpej #endif 56 1.2.2.2 thorpej #include <netinet6/in6_systm.h> 57 1.2.2.2 thorpej #include <netinet/ip6.h> 58 1.2.2.2 thorpej #endif 59 1.2.2.2 thorpej 60 1.2.2.2 thorpej #include <netinet/ip_ecn.h> 61 1.2.2.2 thorpej 62 1.2.2.2 thorpej /* 63 1.2.2.2 thorpej * modify outer ECN (TOS) field on ingress operation (tunnel encapsulation). 64 1.2.2.2 thorpej * call it after you've done the default initialization/copy for the outer. 65 1.2.2.2 thorpej */ 66 1.2.2.2 thorpej void 67 1.2.2.2 thorpej ip_ecn_ingress(mode, outer, inner) 68 1.2.2.2 thorpej int mode; 69 1.2.2.2 thorpej u_int8_t *outer; 70 1.2.2.2 thorpej u_int8_t *inner; 71 1.2.2.2 thorpej { 72 1.2.2.2 thorpej if (!outer || !inner) 73 1.2.2.2 thorpej panic("NULL pointer passed to ip_ecn_ingress"); 74 1.2.2.2 thorpej 75 1.2.2.2 thorpej switch (mode) { 76 1.2.2.2 thorpej case ECN_ALLOWED: /* ECN allowed */ 77 1.2.2.2 thorpej *outer &= ~IPTOS_CE; 78 1.2.2.2 thorpej break; 79 1.2.2.2 thorpej case ECN_FORBIDDEN: /* ECN forbidden */ 80 1.2.2.2 thorpej *outer &= ~(IPTOS_ECT | IPTOS_CE); 81 1.2.2.2 thorpej break; 82 1.2.2.2 thorpej case ECN_NOCARE: /* no consideration to ECN */ 83 1.2.2.2 thorpej break; 84 1.2.2.2 thorpej } 85 1.2.2.2 thorpej } 86 1.2.2.2 thorpej 87 1.2.2.2 thorpej /* 88 1.2.2.2 thorpej * modify inner ECN (TOS) field on egress operation (tunnel decapsulation). 89 1.2.2.2 thorpej * call it after you've done the default initialization/copy for the inner. 90 1.2.2.2 thorpej */ 91 1.2.2.2 thorpej void 92 1.2.2.2 thorpej ip_ecn_egress(mode, outer, inner) 93 1.2.2.2 thorpej int mode; 94 1.2.2.2 thorpej u_int8_t *outer; 95 1.2.2.2 thorpej u_int8_t *inner; 96 1.2.2.2 thorpej { 97 1.2.2.2 thorpej if (!outer || !inner) 98 1.2.2.2 thorpej panic("NULL pointer passed to ip_ecn_egress"); 99 1.2.2.2 thorpej 100 1.2.2.2 thorpej switch (mode) { 101 1.2.2.2 thorpej case ECN_ALLOWED: 102 1.2.2.2 thorpej if (*outer & IPTOS_CE) 103 1.2.2.2 thorpej *inner |= IPTOS_CE; 104 1.2.2.2 thorpej break; 105 1.2.2.2 thorpej case ECN_FORBIDDEN: /* ECN forbidden */ 106 1.2.2.2 thorpej case ECN_NOCARE: /* no consideration to ECN */ 107 1.2.2.2 thorpej break; 108 1.2.2.2 thorpej } 109 1.2.2.2 thorpej } 110 1.2.2.2 thorpej 111 1.2.2.2 thorpej #ifdef INET6 112 1.2.2.2 thorpej void 113 1.2.2.2 thorpej ip6_ecn_ingress(mode, outer, inner) 114 1.2.2.2 thorpej int mode; 115 1.2.2.2 thorpej u_int32_t *outer; 116 1.2.2.2 thorpej u_int32_t *inner; 117 1.2.2.2 thorpej { 118 1.2.2.2 thorpej u_int8_t outer8, inner8; 119 1.2.2.2 thorpej 120 1.2.2.2 thorpej if (!outer || !inner) 121 1.2.2.2 thorpej panic("NULL pointer passed to ip6_ecn_ingress"); 122 1.2.2.2 thorpej 123 1.2.2.2 thorpej outer8 = (ntohl(*outer) >> 20) & 0xff; 124 1.2.2.2 thorpej inner8 = (ntohl(*inner) >> 20) & 0xff; 125 1.2.2.2 thorpej ip_ecn_ingress(mode, &outer8, &inner8); 126 1.2.2.2 thorpej *outer &= ~htonl(0xff << 20); 127 1.2.2.2 thorpej *outer |= htonl((u_int32_t)outer8 << 20); 128 1.2.2.2 thorpej } 129 1.2.2.2 thorpej 130 1.2.2.2 thorpej void 131 1.2.2.2 thorpej ip6_ecn_egress(mode, outer, inner) 132 1.2.2.2 thorpej int mode; 133 1.2.2.2 thorpej u_int32_t *outer; 134 1.2.2.2 thorpej u_int32_t *inner; 135 1.2.2.2 thorpej { 136 1.2.2.2 thorpej u_int8_t outer8, inner8; 137 1.2.2.2 thorpej 138 1.2.2.2 thorpej if (!outer || !inner) 139 1.2.2.2 thorpej panic("NULL pointer passed to ip6_ecn_egress"); 140 1.2.2.2 thorpej 141 1.2.2.2 thorpej outer8 = (ntohl(*outer) >> 20) & 0xff; 142 1.2.2.2 thorpej inner8 = (ntohl(*inner) >> 20) & 0xff; 143 1.2.2.2 thorpej ip_ecn_egress(mode, &outer8, &inner8); 144 1.2.2.2 thorpej *inner &= ~htonl(0xff << 20); 145 1.2.2.2 thorpej *inner |= htonl((u_int32_t)inner8 << 20); 146 1.2.2.2 thorpej } 147 1.2.2.2 thorpej #endif 148
Indexes created Mon Oct 27 20:09:55 GMT 2025