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NetBSD/sys/netiso/eonvar.h
dyoung 5493f188c7 KNF: de-__P, bzero -> memset, bcmp -> memcmp. Remove extraneous 
parentheses in return statements.

Cosmetic: don't open-code TAILQ_FOREACH().

Cosmetic: change types of variables to avoid oodles of casts: in
   in6_src.c, avoid casts by changing several route_in6 pointers
   to struct route pointers.  Remove unnecessary casts to caddr_t
   elsewhere.

Pave the way for eliminating address family-specific route caches:
   soon, struct route will not embed a sockaddr, but it will hold
   a reference to an external sockaddr, instead.  We will set the
   destination sockaddr using rtcache_setdst().  (I created a stub
   for it, but it isn't used anywhere, yet.)  rtcache_free() will
   free the sockaddr.  I have extracted from rtcache_free() a helper
   subroutine, rtcache_clear().  rtcache_clear() will "forget" a
   cached route, but it will not forget the destination by releasing
   the sockaddr.  I use rtcache_clear() instead of rtcache_free()
   in rtcache_update(), because rtcache_update() is not supposed
   to forget the destination.

Constify:

   1 Introduce const accessor for route->ro_dst, rtcache_getdst().

   2 Constify the 'dst' argument to ifnet->if_output().  This
     led me to constify a lot of code called by output routines.

   3 Constify the sockaddr argument to protosw->pr_ctlinput.  This
     led me to constify a lot of code called by ctlinput routines.

   4 Introduce const macros for converting from a generic sockaddr
     to family-specific sockaddrs, e.g., sockaddr_in: satocsin6,
     satocsin, et cetera.
2007-02-17 22:34:07 +00:00

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/* $NetBSD: eonvar.h,v 1.15 2007/02/17 22:34:16 dyoung Exp $ */
/*-
* Copyright (c) 1991, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)eonvar.h 8.1 (Berkeley) 6/10/93
*/
/***********************************************************
Copyright IBM Corporation 1987
All Rights Reserved
Permission to use, copy, modify, and distribute this software and its
documentation for any purpose and without fee is hereby granted,
provided that the above copyright notice appear in all copies and that
both that copyright notice and this permission notice appear in
supporting documentation, and that the name of IBM not be
used in advertising or publicity pertaining to distribution of the
software without specific, written prior permission.
IBM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
IBM BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
SOFTWARE.
******************************************************************/
/*
* ARGO Project, Computer Sciences Dept., University of Wisconsin - Madison
*/
#ifndef _NETISO_EONVAR_H_
#define _NETISO_EONVAR_H_
#include <sys/ansi.h>
#ifndef sa_family_t
typedef __sa_family_t sa_family_t;
#define sa_family_t __sa_family_t
#endif
#define EON_986_VERSION 0x3
#define EON_VERSION 0x1
#define EON_CACHESIZE 30
#define E_FREE 1
#define E_LINK 2
#define E_ES 3
#define E_IS 4
/*
* this overlays a sockaddr_iso
*/
struct sockaddr_eon {
u_char seon_len; /* Length */
sa_family_t seon_family; /* AF_ISO */
u_char seon_status; /* overlays session suffixlen */
#define EON_ESLINK_UP 0x1
#define EON_ESLINK_DOWN 0x2
#define EON_ISLINK_UP 0x10
#define EON_ISLINK_DOWN 0x20
/* no change is neither up or down */
u_char seon_pad1; /* 0, overlays tsfxlen */
u_char seon_adrlen;
u_char seon_afi; /* 47 */
u_char seon_idi[2]; /* 0006 */
u_char seon_vers; /* 03 */
u_char seon_glbnum[2]; /* see RFC 1069 */
u_char seon_RDN[2]; /* see RFC 1070 */
u_char seon_pad2[3]; /* see RFC 1070 */
u_char seon_LAREA[2]; /* see RFC 1070 */
u_char seon_pad3[2]; /* see RFC 1070 */
/*
* right now ip addr is aligned -- be careful -- future revisions
* may have it u_char[4]
*/
u_int seon_ipaddr; /* a.b.c.d */
u_char seon_protoid; /* NSEL */
};
#ifdef EON_TEMPLATE
struct sockaddr_eon eon_template = {
sizeof(eon_template), AF_ISO, 0, 0, 0x14,
0x47, 0x0, 0x6, 0x3, 0
};
#endif
#define DOWNBITS ( EON_ESLINK_DOWN | EON_ISLINK_DOWN )
#define UPBITS ( EON_ESLINK_UP | EON_ISLINK_UP )
struct eon_hdr {
u_char eonh_vers; /* value 1 */
u_char eonh_class; /* address multicast class, below */
#define EON_NORMAL_ADDR 0x0
#define EON_MULTICAST_ES 0x1
#define EON_MULTICAST_IS 0x2
#define EON_BROADCAST 0x3
u_short eonh_csum; /* osi checksum (choke) */
};
struct eon_iphdr {
struct ip ei_ip;
struct eon_hdr ei_eh;
};
#define EONIPLEN (sizeof(struct eon_hdr) + sizeof(struct ip))
/* stole these 2 fields of the flags for I-am-ES and I-am-IS */
#define IFF_ES 0x400
#define IFF_IS 0x800
struct eon_stat {
int es_in_multi_es;
int es_in_multi_is;
int es_in_broad;
int es_in_normal;
int es_out_multi_es;
int es_out_multi_is;
int es_out_broad;
int es_out_normal;
int es_ipout;
int es_icmp[PRC_NCMDS];
/* errors */
int es_badcsum;
int es_badhdr;
} eonstat;
#undef IncStat
#define IncStat(xxx) eonstat.xxx++
typedef struct qhdr {
struct qhdr *link, *rlink;
} *queue_t;
struct eon_llinfo {
struct qhdr el_qhdr;/* keep all in a list */
int el_flags; /* cache valid ? */
int el_snpaoffset; /* IP address contained in dst nsap */
struct rtentry *el_rt; /* back pointer to parent route */
struct eon_iphdr el_ei; /* precomputed portion of hdr */
struct route el_iproute; /* if direct route cache IP info */
/* if gateway, cache secondary route */
};
#define el_iphdr el_ei.ei_ip
#define el_eonhdr el_ei.ei_eh
#ifdef _KERNEL
void eonprotoinit (void);
void eonattach (void);
int eonioctl (struct ifnet *, u_long, caddr_t);
void eoniphdr (struct eon_iphdr *, const void *, struct route *, int, int);
void eonrtrequest (int, struct rtentry *, struct rt_addrinfo *);
int eonoutput(struct ifnet *, struct mbuf *, const struct sockaddr *,
struct rtentry *);
void eoninput (struct mbuf *, ...);
void *eonctlinput(int, const struct sockaddr *, void *);
#endif
#endif /* !_NETISO_EONVAR_H_ */
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