08e6f22226
from the forwarding table's users:
Introduce rt_walktree() for walking the routing table and
applying a function to each rtentry. Replace most
rn_walktree() calls with it.
Use rt_getkey()/rt_setkey() to get/set a route's destination.
Keep a pointer to the sockaddr key in the rtentry, so that
rtentry users do not have to grovel in the radix_node for
the key.
Add a RTM_GET method to rtrequest. Use that instead of
radix_node lookups in, e.g., carp(4).
Add sys/net/link_proto.c, which supplies sockaddr routines for
link-layer socket addresses (sockaddr_dl).
Cosmetic:
Constify. KNF. Stop open-coding LIST_FOREACH, TAILQ_FOREACH,
et cetera. Use NULL instead of 0 for null pointers. Use
__arraycount(). Reduce gratuitous parenthesization.
Stop using variadic arguments for rip6_output(), it is
unnecessary.
Remove the unnecessary rtentry member rt_genmask and the
code to maintain it, since nothing actually used it.
Make rt_maskedcopy() easier to read by using meaningful variable
names.
Extract a subroutine intern_netmask() for looking up a netmask in
the masks table.
Start converting backslash-ridden IPv6 macros in
sys/netinet6/in6_var.h into inline subroutines that one
can read without special eyeglasses.
One functional change: when the kernel serves an RTM_GET, RTM_LOCK,
or RTM_CHANGE request, it applies the netmask (if supplied) to a
destination before searching for it in the forwarding table.
I have changed sys/netinet/ip_carp.c, carp_setroute(), to remove
the unlawful radix_node knowledge.
Apart from the changes to carp(4), netiso, ATM, and strip(4), I
have run the changes on three nodes in my wireless routing testbed,
which involves IPv4 + IPv6 dynamic routing acrobatics, and it's
working beautifully so far.
151 lines
5.8 KiB
C
151 lines
5.8 KiB
C
/* $NetBSD: esis.h,v 1.22 2007/07/19 20:48:59 dyoung Exp $ */
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/*-
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* Copyright (c) 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)esis.h 8.1 (Berkeley) 6/10/93
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*/
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/***********************************************************
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Copyright IBM Corporation 1987
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose and without fee is hereby granted,
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provided that the above copyright notice appear in all copies and that
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both that copyright notice and this permission notice appear in
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supporting documentation, and that the name of IBM not be
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used in advertising or publicity pertaining to distribution of the
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software without specific, written prior permission.
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IBM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
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ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
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IBM BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
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ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
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WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
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ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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SOFTWARE.
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******************************************************************/
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/*
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* ARGO Project, Computer Sciences Dept., University of Wisconsin - Madison
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*/
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#ifndef _NETISO_ESIS_H_
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#define _NETISO_ESIS_H_
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#include <machine/endian.h>
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#define SNPAC_AGE 60 /* seconds */
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#define ESIS_CONFIG 60 /* seconds */
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#define ESIS_HT (ESIS_CONFIG * 2)
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/*
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* Fixed part of an ESIS header
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*/
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struct esis_fixed {
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u_char esis_proto_id; /* network layer protocol identifier */
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u_char esis_hdr_len; /* length indicator (octets) */
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u_char esis_vers; /* version/protocol identifier
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* extension */
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u_char esis_res1; /* reserved */
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u_char esis_type; /* type code */
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/* technically, type should be &='d 0x1f */
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#define ESIS_ESH 0x02 /* End System Hello */
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#define ESIS_ISH 0x04 /* Intermediate System Hello */
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#define ESIS_RD 0x06 /* Redirect */
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u_char esis_ht_msb; /* holding time (seconds) high byte */
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u_char esis_ht_lsb; /* holding time (seconds) low byte */
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u_char esis_cksum_msb; /* checksum high byte */
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u_char esis_cksum_lsb; /* checksum low byte */
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} __attribute__((packed));
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/*
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* Values for ESIS datagram options
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*/
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#define ESISOVAL_NETMASK 0xe1 /* address mask option, RD PDU only */
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#define ESISOVAL_SNPAMASK 0xe2 /* snpa mask option, RD PDU only */
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#define ESISOVAL_ESCT 0xc6 /* end system conf. timer, ISH PDU
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* only */
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#define ESIS_CKSUM_OFF 0x07
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#define ESIS_CKSUM_REQUIRED(pdu)\
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((pdu->esis_cksum_msb != 0) || (pdu->esis_cksum_lsb != 0))
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#define ESIS_VERSION 1
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struct esis_stat {
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u_short es_nomem; /* insufficient memory to send hello */
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u_short es_badcsum; /* incorrect checksum */
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u_short es_badvers; /* incorrect version number */
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u_short es_badtype; /* unknown pdu type field */
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u_short es_toosmall; /* packet too small */
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u_short es_eshsent; /* ESH sent */
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u_short es_eshrcvd; /* ESH rcvd */
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u_short es_ishsent; /* ISH sent */
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u_short es_ishrcvd; /* ISH rcvd */
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u_short es_rdsent; /* RD sent */
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u_short es_rdrcvd; /* RD rcvd */
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};
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#ifdef _KERNEL
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extern struct esis_stat esis_stat;
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extern short esis_holding_time;
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extern short esis_config_time;
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extern short esis_esconfig_time;
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struct socket;
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struct mbuf;
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struct snpa_hdr;
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struct clnp_optidx;
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struct iso_addr;
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struct rtentry;
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struct sockaddr_dl;
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void esis_init (void);
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int esis_usrreq (struct socket *, int, struct mbuf *, struct mbuf *,
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struct mbuf *, struct lwp *);
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void esis_input (struct mbuf *, ...);
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void esis_rdoutput (struct snpa_hdr *, struct mbuf *, struct clnp_optidx *,
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struct iso_addr *, struct rtentry *);
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int esis_insert_addr (void **, int *, const struct iso_addr *, struct mbuf *,
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int);
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void esis_eshinput (struct mbuf *, struct snpa_hdr *);
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void esis_ishinput (struct mbuf *, struct snpa_hdr *);
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void esis_rdinput (struct mbuf *, struct snpa_hdr *);
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void esis_config (void *);
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void esis_shoutput (struct ifnet *, int, int, const void *, int,
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struct iso_addr *);
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void isis_input (struct mbuf *, ...);
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int isis_output (struct mbuf *, ...);
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void *esis_ctlinput(int, const struct sockaddr *, void *);
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#endif /* _KERNEL */
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#endif /* !_NETISO_ESIS_H_ */
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