The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

FreeBSD/Linux Kernel Cross Reference
sys/netinet/ip_ecn.c

Version: -  FREEBSD  -  FREEBSD-13-STABLE  -  FREEBSD-13-0  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  l41  -  OPENBSD  -  linux-2.6  -  MK84  -  PLAN9  -  xnu-8792 
SearchContext: -  none  -  3  -  10 

    1 /*      $NetBSD: ip_ecn.c,v 1.12 2002/04/10 09:18:57 itojun Exp $       */
    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 <sys/cdefs.h>
   39 __KERNEL_RCSID(0, "$NetBSD: ip_ecn.c,v 1.12 2002/04/10 09:18:57 itojun Exp $");
   40 
   41 #include "opt_inet.h"
   42 
   43 #include <sys/param.h>
   44 #include <sys/systm.h>
   45 #include <sys/malloc.h>
   46 #include <sys/mbuf.h>
   47 #include <sys/errno.h>
   48 
   49 #include <netinet/in.h>
   50 #include <netinet/in_systm.h>
   51 #include <netinet/ip.h>
   52 #ifdef INET6
   53 #include <netinet/ip6.h>
   54 #endif
   55 
   56 #include <netinet/ip_ecn.h>
   57 
   58 /*
   59  * modify outer ECN (TOS) field on ingress operation (tunnel encapsulation).
   60  */
   61 void
   62 ip_ecn_ingress(mode, outer, inner)
   63         int mode;
   64         u_int8_t *outer;
   65         const u_int8_t *inner;
   66 {
   67         if (!outer || !inner)
   68                 panic("NULL pointer passed to ip_ecn_ingress");
   69 
   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).
   85  */
   86 void
   87 ip_ecn_egress(mode, outer, inner)
   88         int mode;
   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
  107 void
  108 ip6_ecn_ingress(mode, outer, inner)
  109         int mode;
  110         u_int32_t *outer;
  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 
  118         outer8 = (ntohl(*outer) >> 20) & 0xff;
  119         inner8 = (ntohl(*inner) >> 20) & 0xff;
  120         ip_ecn_ingress(mode, &outer8, &inner8);
  121         *outer &= ~htonl(0xff << 20);
  122         *outer |= htonl((u_int32_t)outer8 << 20);
  123 }
  124 
  125 void
  126 ip6_ecn_egress(mode, outer, inner)
  127         int mode;
  128         const u_int32_t *outer;
  129         u_int32_t *inner;
  130 {
  131         u_int8_t outer8, inner8;
  132 
  133         if (!outer || !inner)
  134                 panic("NULL pointer passed to ip6_ecn_egress");
  135 
  136         outer8 = (ntohl(*outer) >> 20) & 0xff;
  137         inner8 = (ntohl(*inner) >> 20) & 0xff;
  138         ip_ecn_egress(mode, &outer8, &inner8);
  139         *inner &= ~htonl(0xff << 20);
  140         *inner |= htonl((u_int32_t)inner8 << 20);
  141 }
  142 #endif

Cache object: 5bb838ea00f6c442e37af64c2fc5b1c4


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.