freebsd-dev/sys/netipx/ipx_outputfl.c

163 lines
4.4 KiB
C
Raw Normal View History

/*
* Copyright (c) 1995, Mike Mitchell
* Copyright (c) 1984, 1985, 1986, 1987, 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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.
*
* @(#)ipx_outputfl.c
*
* $Id: ipx_outputfl.c,v 1.3 1995/11/04 09:03:07 julian Exp $
*/
#include <sys/param.h>
#include <sys/queue.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/errno.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <net/if.h>
#include <net/route.h>
#include <netipx/ipx.h>
#include <netipx/ipx_if.h>
#include <netipx/ipx_var.h>
#ifdef vax
#include <machine/mtpr.h>
#endif
int ipx_hold_output = 0;
int ipx_copy_output = 0;
int ipx_outputfl_cnt = 0;
struct mbuf *ipx_lastout;
int
ipx_outputfl(m0, ro, flags)
struct mbuf *m0;
struct route *ro;
int flags;
{
register struct ipx *ipx = mtod(m0, struct ipx *);
register struct ifnet *ifp = 0;
int error = 0;
struct sockaddr_ipx *dst;
struct route ipxroute;
if (ipx_hold_output) {
if (ipx_lastout) {
(void)m_free(ipx_lastout);
}
ipx_lastout = m_copy(m0, 0, (int)M_COPYALL);
}
/*
* Route packet.
*/
if (ro == 0) {
ro = &ipxroute;
bzero((caddr_t)ro, sizeof (*ro));
}
dst = (struct sockaddr_ipx *)&ro->ro_dst;
if (ro->ro_rt == 0) {
dst->sipx_family = AF_IPX;
dst->sipx_len = sizeof (*dst);
dst->sipx_addr = ipx->ipx_dna;
dst->sipx_addr.x_port = 0;
/*
* If routing to interface only,
* short circuit routing lookup.
*/
if (flags & IPX_ROUTETOIF) {
struct ipx_ifaddr *ia = ipx_iaonnetof(&ipx->ipx_dna);
if (ia == 0) {
error = ENETUNREACH;
goto bad;
}
ifp = ia->ia_ifp;
goto gotif;
}
rtalloc(ro);
} else if ((ro->ro_rt->rt_flags & RTF_UP) == 0) {
/*
* The old route has gone away; try for a new one.
*/
rtfree(ro->ro_rt);
ro->ro_rt = NULL;
rtalloc(ro);
}
if (ro->ro_rt == 0 || (ifp = ro->ro_rt->rt_ifp) == 0) {
error = ENETUNREACH;
goto bad;
}
ro->ro_rt->rt_use++;
if (ro->ro_rt->rt_flags & (RTF_GATEWAY|RTF_HOST))
dst = (struct sockaddr_ipx *)ro->ro_rt->rt_gateway;
gotif:
/*
* Look for multicast addresses and
* and verify user is allowed to send
* such a packet.
*/
if (dst->sipx_addr.x_host.c_host[0]&1) {
if ((ifp->if_flags & IFF_BROADCAST) == 0) {
error = EADDRNOTAVAIL;
goto bad;
}
if ((flags & IPX_ALLOWBROADCAST) == 0) {
error = EACCES;
goto bad;
}
}
if (htons(ipx->ipx_len) <= ifp->if_mtu) {
ipx_outputfl_cnt++;
if (ipx_copy_output) {
ipx_watch_output(m0, ifp);
}
error = (*ifp->if_output)(ifp, m0,
(struct sockaddr *)dst, ro->ro_rt);
goto done;
} else error = EMSGSIZE;
bad:
if (ipx_copy_output) {
ipx_watch_output(m0, ifp);
}
m_freem(m0);
done:
if (ro == &ipxroute && (flags & IPX_ROUTETOIF) == 0 && ro->ro_rt) {
RTFREE(ro->ro_rt);
ro->ro_rt = 0;
}
return (error);
}