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.
379 lines
10 KiB
C
379 lines
10 KiB
C
/* $NetBSD: clnp_raw.c,v 1.28 2007/05/02 20:40:28 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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* @(#)clnp_raw.c 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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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: clnp_raw.c,v 1.28 2007/05/02 20:40:28 dyoung Exp $");
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#include <sys/param.h>
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#include <sys/mbuf.h>
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#include <sys/domain.h>
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#include <sys/protosw.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/errno.h>
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#include <sys/time.h>
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#include <sys/systm.h>
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#include <sys/proc.h>
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#include <net/if.h>
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#include <net/route.h>
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#include <net/raw_cb.h>
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#include <netiso/iso.h>
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#include <netiso/iso_pcb.h>
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#include <netiso/clnp.h>
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#include <netiso/clnp_stat.h>
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#include <netiso/argo_debug.h>
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#include <netiso/tp_user.h> /* XXX -- defines SOL_NETWORK */
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#include <machine/stdarg.h>
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struct sockproto rclnp_proto = {PF_ISO, 0};
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/*
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* FUNCTION: rclnp_input
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*
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* PURPOSE: Setup generic address and protocol structures for
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* raw input routine, then pass them along with the
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* mbuf chain.
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*
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* RETURNS: none
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*
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* SIDE EFFECTS:
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*
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* NOTES: The protocol field of rclnp_proto is set to zero
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* indicating no protocol.
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*/
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void
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rclnp_input(struct mbuf *m, ...)
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{
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struct sockaddr_iso *src; /* ptr to src address */
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struct sockaddr_iso *dst; /* ptr to dest address */
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int hdrlen; /* length (in bytes) of clnp header */
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va_list ap;
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va_start(ap, m);
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src = va_arg(ap, struct sockaddr_iso *);
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dst = va_arg(ap, struct sockaddr_iso *);
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hdrlen = va_arg(ap, int);
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va_end(ap);
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#ifdef TROLL
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if (trollctl.tr_ops & TR_CHUCK) {
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m_freem(m);
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return;
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}
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#endif /* TROLL */
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raw_input(m, &rclnp_proto, sisotosa(src), sisotosa(dst));
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}
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/*
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* FUNCTION: rclnp_output
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*
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* PURPOSE: Prepare to send a raw clnp packet. Setup src and dest
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* addresses, count the number of bytes to send, and
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* call clnp_output.
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*
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* RETURNS: success - 0
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* failure - an appropriate error code
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*
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* SIDE EFFECTS:
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*
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* NOTES:
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*/
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int
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rclnp_output(struct mbuf *m0, ...)
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{
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struct socket *so; /* socket to send from */
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struct rawisopcb *rp; /* ptr to raw cb */
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int error; /* return value of function */
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int flags; /* flags for clnp_output */
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va_list ap;
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va_start(ap, m0);
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so = va_arg(ap, struct socket *);
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va_end(ap);
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rp = sotorawisopcb(so);
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if ((m0->m_flags & M_PKTHDR) == 0)
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return (EINVAL);
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/*
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* Set up src address. If user has bound socket to an address, use it.
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* Otherwise, do not specify src (clnp_output will fill it in).
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*/
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if (rp->risop_rcb.rcb_laddr) {
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if (rp->risop_isop.isop_sladdr.siso_family != AF_ISO) {
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bad:
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m_freem(m0);
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return (EAFNOSUPPORT);
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}
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}
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/* set up dest address */
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if (rp->risop_rcb.rcb_faddr == 0)
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goto bad;
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rp->risop_isop.isop_sfaddr = *satosiso(rp->risop_rcb.rcb_faddr);
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rp->risop_isop.isop_faddr = &rp->risop_isop.isop_sfaddr;
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/* get flags and ship it off */
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flags = rp->risop_flags & CLNP_VFLAGS;
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error = clnp_output(m0, &rp->risop_isop, m0->m_pkthdr.len,
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flags | CLNP_NOCACHE);
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return (error);
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}
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/*
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* FUNCTION: rclnp_ctloutput
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*
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* PURPOSE: Raw clnp socket option processing
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* All options are stored inside an mbuf.
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*
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* RETURNS: success - 0
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* failure - unix error code
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*
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* SIDE EFFECTS: If the options mbuf does not exist, it the mbuf passed
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* is used.
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*
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* NOTES:
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*/
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int
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rclnp_ctloutput(
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int op, /* type of operation */
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struct socket *so, /* ptr to socket */
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int level, /* level of option */
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int optname,/* name of option */
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struct mbuf **m) /* ptr to ptr to option data */
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{
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int error = 0;
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struct rawisopcb *rp = sotorawisopcb(so); /* raw cb ptr */
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#ifdef ARGO_DEBUG
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if (argo_debug[D_CTLOUTPUT]) {
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printf("rclnp_ctloutput: op = x%x, level = x%x, name = x%x\n",
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op, level, optname);
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if (*m != NULL) {
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printf("rclnp_ctloutput: %d bytes of mbuf data\n", (*m)->m_len);
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dump_buf(mtod((*m), void *), (*m)->m_len);
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}
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}
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#endif
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#ifdef SOL_NETWORK
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if (level != SOL_NETWORK)
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error = EINVAL;
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else
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switch (op) {
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#else
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switch (op) {
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#endif /* SOL_NETWORK */
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case PRCO_SETOPT:
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switch (optname) {
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case CLNPOPT_FLAGS:{
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u_short usr_flags;
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/*
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* Insure that the data passed has exactly
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* one short in it
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*/
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if ((*m == NULL) || ((*m)->m_len != sizeof(short))) {
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error = EINVAL;
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break;
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}
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/*
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* Don't allow invalid flags to be set
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*/
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usr_flags = (*mtod((*m), short *));
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if ((usr_flags & (CLNP_VFLAGS)) != usr_flags) {
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error = EINVAL;
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} else
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rp->risop_flags |= usr_flags;
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} break;
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case CLNPOPT_OPTS:
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error = clnp_set_opts(&rp->risop_isop.isop_options, m);
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if (error)
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break;
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rp->risop_isop.isop_optindex = m_get(M_WAIT, MT_SOOPTS);
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(void) clnp_opt_sanity(rp->risop_isop.isop_options,
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mtod(rp->risop_isop.isop_options, void *),
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rp->risop_isop.isop_options->m_len,
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mtod(rp->risop_isop.isop_optindex,
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struct clnp_optidx *));
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break;
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}
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break;
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case PRCO_GETOPT:
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#ifdef notdef
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/* commented out to keep hi C quiet */
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switch (optname) {
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default:
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error = EINVAL;
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break;
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}
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#endif /* notdef */
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break;
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default:
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error = EINVAL;
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break;
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}
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if (op == PRCO_SETOPT) {
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/* note: m_freem does not barf is *m is NULL */
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m_freem(*m);
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*m = NULL;
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}
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return error;
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}
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/* ARGSUSED */
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int
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clnp_usrreq(struct socket *so, int req, struct mbuf *m, struct mbuf *nam,
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struct mbuf *control, struct lwp *l)
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{
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int error = 0;
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struct rawisopcb *rp = sotorawisopcb(so);
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struct proc *p;
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p = l ? l->l_proc : NULL;
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rp = sotorawisopcb(so);
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switch (req) {
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case PRU_ATTACH:
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if (rp != 0) {
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error = EISCONN;
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break;
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}
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MALLOC(rp, struct rawisopcb *, sizeof *rp, M_PCB,
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M_WAITOK|M_ZERO);
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if (rp == 0)
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return (ENOBUFS);
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so->so_pcb = rp;
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break;
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case PRU_DETACH:
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if (rp->risop_isop.isop_options)
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m_freem(rp->risop_isop.isop_options);
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rtcache_free(&rp->risop_isop.isop_route);
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if (rp->risop_rcb.rcb_laddr)
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rp->risop_rcb.rcb_laddr = 0;
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/* free clnp cached hdr if necessary */
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if (rp->risop_isop.isop_clnpcache != NULL) {
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struct clnp_cache *clcp =
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mtod(rp->risop_isop.isop_clnpcache, struct clnp_cache *);
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if (clcp->clc_hdr != NULL) {
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m_free(clcp->clc_hdr);
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}
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m_free(rp->risop_isop.isop_clnpcache);
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}
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if (rp->risop_isop.isop_optindex != NULL)
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m_free(rp->risop_isop.isop_optindex);
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break;
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case PRU_BIND:
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{
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struct sockaddr_iso *addr = mtod(nam, struct sockaddr_iso *);
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if (nam->m_len != sizeof(*addr))
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return (EINVAL);
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if ((ifnet.tqh_first == 0) ||
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(addr->siso_family != AF_ISO) ||
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(addr->siso_addr.isoa_len &&
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ifa_ifwithaddr(sisotosa(addr)) == 0))
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return (EADDRNOTAVAIL);
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rp->risop_isop.isop_sladdr = *addr;
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rp->risop_rcb.rcb_laddr = sisotosa(
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(rp->risop_isop.isop_laddr = &rp->risop_isop.isop_sladdr));
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return (0);
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}
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case PRU_CONNECT:
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{
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struct sockaddr_iso *addr = mtod(nam, struct sockaddr_iso *);
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if ((nam->m_len > sizeof(*addr)) || (addr->siso_len > sizeof(*addr)))
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return (EINVAL);
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if (ifnet.tqh_first == 0)
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return (EADDRNOTAVAIL);
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/* copy the address */
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if (addr->siso_family != AF_ISO)
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rp->risop_isop.isop_sfaddr = *addr;
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/* initialize address pointers */
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rp->risop_isop.isop_faddr = &rp->risop_isop.isop_sfaddr;
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rp->risop_rcb.rcb_faddr = sisotosa(
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rp->risop_isop.isop_faddr);
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/* address setup, mark socket connected */
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soisconnected(so);
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return (0);
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}
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}
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error = raw_usrreq(so, req, m, nam, control, l);
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if (error && req == PRU_ATTACH && so->so_pcb)
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free((void *) rp, M_PCB);
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return (error);
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}
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