72f0a6dfb0
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.
131 lines
5.2 KiB
C
131 lines
5.2 KiB
C
/* $NetBSD: iso_pcb.h,v 1.17 2007/05/02 20:40:29 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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* @(#)iso_pcb.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_ISO_PCB_H_
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#define _NETISO_ISO_PCB_H_
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#include <net/route.h>
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#define MAXX25CRUDLEN 16 /* 16 bytes of call request user data */
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/*
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* Common structure pcb for argo protocol implementation.
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*/
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struct isopcb {
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struct isopcb *isop_next, *isop_prev; /* pointers to other pcb's */
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struct isopcb *isop_head; /* pointer back to chain of pcbs for
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* this protocol */
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struct socket *isop_socket; /* back pointer to socket */
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struct sockaddr_iso *isop_laddr;
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struct sockaddr_iso *isop_faddr;
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struct route isop_route; /* CLNP routing entry */
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struct mbuf *isop_options; /* CLNP options */
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struct mbuf *isop_optindex; /* CLNP options index */
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struct mbuf *isop_clnpcache; /* CLNP cached hdr */
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void * isop_chan; /* actually struct pklcb * */
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u_short isop_refcnt; /* mult TP4 tpcb's -> here */
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u_short isop_lport; /* MISLEADLING work var */
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u_short isop_tuba_cached; /* for tuba address ref cnts */
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int isop_x25crud_len; /* x25 call request ud */
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char isop_x25crud[MAXX25CRUDLEN];
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struct ifaddr *isop_ifa; /* ESIS interface assoc w/sock */
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struct mbuf *isop_mladdr; /* dynamically allocated laddr */
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struct mbuf *isop_mfaddr; /* dynamically allocated faddr */
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struct sockaddr_iso isop_sladdr, /* preallocated laddr */
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isop_sfaddr; /* preallocated faddr */
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};
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#ifdef sotorawcb
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/*
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* Common structure pcb for raw clnp protocol access.
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* Here are clnp specific extensions to the raw control block,
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* and space is allocated to the necessary sockaddrs.
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*/
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struct rawisopcb {
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struct rawcb risop_rcb; /* common control block prefix */
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int risop_flags; /* flags, e.g. raw sockopts */
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struct isopcb risop_isop; /* space for bound addresses, routes
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* etc. */
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};
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#endif
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#define sotoisopcb(so) ((struct isopcb *)(so)->so_pcb)
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#define sotorawisopcb(so) ((struct rawisopcb *)(so)->so_pcb)
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#ifdef _KERNEL
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struct socket;
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struct isopcb;
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struct inpcb;
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struct mbuf;
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struct sockaddr_iso;
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int iso_pcballoc (struct socket *, void *);
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int iso_pcbbind (void *, struct mbuf *, struct lwp *);
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int iso_pcbconnect (void *, struct mbuf *, struct lwp *);
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void iso_pcbdisconnect (void *);
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void iso_pcbdetach (void *);
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void iso_pcbnotify(struct isopcb *, const struct sockaddr_iso *, int,
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void (*)(struct isopcb *));
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struct isopcb *iso_pcblookup (struct isopcb *, int, void *,
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const struct sockaddr_iso *);
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#endif
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#endif /* !_NETISO_ISO_PCB_H_ */
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