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NetBSD/sys/netiso/iso.h
dyoung 72f0a6dfb0 Eliminate address family-specific route caches (struct route, struct 
route_in6, struct route_iso), replacing all caches with a struct
route.

The principle benefit of this change is that all of the protocol
families can benefit from route cache-invalidation, which is
necessary for correct routing.  Route-cache invalidation fixes an
ancient PR, kern/3508, at long last; it fixes various other PRs,
also.

Discussions with and ideas from Joerg Sonnenberger influenced this
work tremendously.  Of course, all design oversights and bugs are
mine.

DETAILS

1 I added to each address family a pool of sockaddrs.  I have
  introduced routines for allocating, copying, and duplicating,
  and freeing sockaddrs:

        struct sockaddr *sockaddr_alloc(sa_family_t af, int flags);
        struct sockaddr *sockaddr_copy(struct sockaddr *dst,
                                       const struct sockaddr *src);
        struct sockaddr *sockaddr_dup(const struct sockaddr *src, int flags);
        void sockaddr_free(struct sockaddr *sa);

  sockaddr_alloc() returns either a sockaddr from the pool belonging
  to the specified family, or NULL if the pool is exhausted.  The
  returned sockaddr has the right size for that family; sa_family
  and sa_len fields are initialized to the family and sockaddr
  length---e.g., sa_family = AF_INET and sa_len = sizeof(struct
  sockaddr_in).  sockaddr_free() puts the given sockaddr back into
  its family's pool.

  sockaddr_dup() and sockaddr_copy() work analogously to strdup()
  and strcpy(), respectively.  sockaddr_copy() KASSERTs that the
  family of the destination and source sockaddrs are alike.

  The 'flags' argumet for sockaddr_alloc() and sockaddr_dup() is
  passed directly to pool_get(9).

2 I added routines for initializing sockaddrs in each address
  family, sockaddr_in_init(), sockaddr_in6_init(), sockaddr_iso_init(),
  etc.  They are fairly self-explanatory.

3 structs route_in6 and route_iso are no more.  All protocol families
  use struct route.  I have changed the route cache, 'struct route',
  so that it does not contain storage space for a sockaddr.  Instead,
  struct route points to a sockaddr coming from the pool the sockaddr
  belongs to.  I added a new method to struct route, rtcache_setdst(),
  for setting the cache destination:

        int rtcache_setdst(struct route *, const struct sockaddr *);

  rtcache_setdst() returns 0 on success, or ENOMEM if no memory is
  available to create the sockaddr storage.

  It is now possible for rtcache_getdst() to return NULL if, say,
  rtcache_setdst() failed.  I check the return value for NULL
  everywhere in the kernel.

4 Each routing domain (struct domain) has a list of live route
  caches, dom_rtcache.  rtflushall(sa_family_t af) looks up the
  domain indicated by 'af', walks the domain's list of route caches
  and invalidates each one.
2007-05-02 20:40:22 +00:00

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/* $NetBSD: iso.h,v 1.20 2007/05/02 20:40:28 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.
*
* @(#)iso.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_ISO_H_
#define _NETISO_ISO_H_
#include <sys/ansi.h>
#ifndef sa_family_t
typedef __sa_family_t sa_family_t;
#define sa_family_t __sa_family_t
#endif
/*
* Return true if this is a multicast address
* This assumes that the bit transmission is lsb first. This
* assumption is valid for 802.3 but not 802.5. There is a
* kludge to get around this for 802.5 -- see if_lan.c
* where subnetwork header is setup.
*/
#define IS_MULTICAST(snpa)\
((snpa)[0] & 0x01)
/*
* Protocols
*/
#define ISOPROTO_TCP 6 /* IETF experiment */
#define ISOPROTO_UDP 17 /* IETF experiment */
#define ISOPROTO_TP0 25 /* connection oriented transport protocol */
#define ISOPROTO_TP1 26 /* not implemented */
#define ISOPROTO_TP2 27 /* not implemented */
#define ISOPROTO_TP3 28 /* not implemented */
#define ISOPROTO_TP4 29 /* connection oriented transport protocol */
#define ISOPROTO_TP ISOPROTO_TP4 /* tp-4 with negotiation */
#define ISOPROTO_CLTP 30 /* connectionless transport (not yet impl.) */
#define ISOPROTO_CLNP 31 /* connectionless internetworking protocol */
#define ISOPROTO_X25 32 /* cons */
#define ISOPROTO_INACT_NL 33 /* inactive network layer! */
#define ISOPROTO_ESIS 34 /* ES-IS protocol */
#define ISOPROTO_INTRAISIS 35 /* IS-IS protocol */
#define ISOPROTO_IDRP 36 /* Interdomain Routing Protocol */
#define ISOPROTO_RAW 255 /* raw clnp */
#define ISOPROTO_MAX 256
#define ISO_PORT_RESERVED 1024
#define ISO_PORT_USERRESERVED 5000
/*
* Port/socket numbers: standard network functions
* NOT PRESENTLY USED
*/
#define ISO_PORT_MAINT 501
#define ISO_PORT_ECHO 507
#define ISO_PORT_DISCARD 509
#define ISO_PORT_SYSTAT 511
#define ISO_PORT_NETSTAT 515
/*
* Port/socket numbers: non-standard application functions
*/
#define ISO_PORT_LOGIN 513
/*
* Port/socket numbers: public use
*/
#define ISO_PORT_PUBLIC 1024 /* high bit set --> public */
/*
* Network layer protocol identifiers
*/
#define ISO8473_CLNP 0x81
#define ISO9542_ESIS 0x82
#define ISO9542X25_ESIS 0x8a
#define ISO10589_ISIS 0x83
#define ISO8878A_CONS 0x84
#define ISO10747_IDRP 0x85
#ifndef IN_CLASSA_NET
#include <netinet/in.h>
#endif /* IN_CLASSA_NET */
/*
* The following looks like a sockaddr to facilitate using tree lookup
* routines
*/
struct iso_addr {
uint8_t isoa_len; /* length (in bytes) */
char isoa_genaddr[20]; /* general opaque address */
};
struct sockaddr_iso {
uint8_t siso_len; /* length */
sa_family_t siso_family; /* family */
uint8_t siso_plen; /* presentation selector length */
uint8_t siso_slen; /* session selector length */
uint8_t siso_tlen; /* transport selector length */
struct iso_addr siso_addr; /* network address */
uint8_t siso_pad[6]; /* space for gosip v2 sels */
/* makes struct 32 bytes long */
};
#define siso_nlen siso_addr.isoa_len
#define siso_data siso_addr.isoa_genaddr
static inline void *
WRITABLE_TSEL(struct sockaddr_iso *siso)
{
return &siso->siso_data[siso->siso_nlen];
}
static inline const char *
TSEL(const struct sockaddr_iso *siso)
{
return &siso->siso_data[siso->siso_nlen];
}
#define SAME_ISOADDR(a, b) \
(bcmp((a)->siso_data, (b)->siso_data, (unsigned)(a)->siso_nlen)==0)
#define SAME_ISOIFADDR(a, b) (bcmp((a)->siso_data, (b)->siso_data, \
(unsigned)((b)->siso_nlen - (b)->siso_tlen)) == 0)
/*
* The following are specific values for siso->siso_data[0],
* otherwise known as the AFI:
*/
#define AFI_37 0x37 /* bcd of "37" */
#define AFI_OSINET 0x47 /* bcd of "47" */
#define AFI_RFC986 0x47 /* bcd of "47" */
#define AFI_SNA 0x00 /* SubNetwork Address; invalid really... */
#ifdef _KERNEL
#include <sys/protosw.h>
extern struct domain isodomain;
extern const struct protosw isosw[];
#define satosiso(sa) ((struct sockaddr_iso *)(sa))
#define satocsiso(sa) ((const struct sockaddr_iso *)(sa))
#define sisotosa(siso) ((struct sockaddr *)(siso))
int sockaddr_iso_cmp(const struct sockaddr *, const struct sockaddr *);
static inline int
sockaddr_iso_init1(struct sockaddr_iso *siso, const struct iso_addr *addr)
{
memset(&siso->siso_plen, 0,
sizeof(*siso) - offsetof(struct sockaddr_iso, siso_plen));
if (offsetof(struct iso_addr, isoa_genaddr[addr->isoa_len]) >
sizeof(struct iso_addr))
return EINVAL;
memcpy(&siso->siso_addr, addr,
offsetof(struct iso_addr, isoa_genaddr[addr->isoa_len]));
return 0;
}
static inline int
sockaddr_iso_init(struct sockaddr_iso *siso, const struct iso_addr *addr)
{
siso->siso_family = AF_ISO;
siso->siso_len = sizeof(*siso);
return sockaddr_iso_init1(siso, addr);
}
static inline struct sockaddr *
sockaddr_iso_alloc(const struct iso_addr *addr, int flags)
{
struct sockaddr *sa;
if ((sa = sockaddr_alloc(AF_ISO, flags)) == NULL)
return NULL;
if (sockaddr_iso_init1(satosiso(sa), addr) != 0) {
sockaddr_free(sa);
return NULL;
}
return sa;
}
#else
/* user utilities definitions from the iso library */
#include <sys/cdefs.h>
__BEGIN_DECLS
struct iso_addr *iso_addr __P((const char *));
char *iso_ntoa __P((const struct iso_addr *));
/* THESE DON'T EXIST YET */
struct hostent *iso_gethostbyname __P((const char *));
struct hostent *iso_gethostbyaddr __P((const char *, int, int));
__END_DECLS
#endif /* _KERNEL */
#endif /* !_NETISO_ISO_H_ */
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