FreeBSD-5.3/sys/netipx/ipx_outputfl.c
/*
* 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
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/sys/netipx/ipx_outputfl.c,v 1.19 2003/06/11 05:25:14 obrien Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <net/if.h>
#include <net/route.h>
#include <netipx/ipx.h>
#include <netipx/ipx_if.h>
#include <netipx/ipx_var.h>
static int ipx_copy_output = 0;
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 = NULL;
int error = 0;
struct sockaddr_ipx *dst;
struct route ipxroute;
/*
* Route packet.
*/
if (ro == NULL) {
ro = &ipxroute;
bzero((caddr_t)ro, sizeof(*ro));
}
dst = (struct sockaddr_ipx *)&ro->ro_dst;
if (ro->ro_rt == NULL) {
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 == NULL) {
ipxstat.ipxs_noroute++;
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 == NULL || (ifp = ro->ro_rt->rt_ifp) == NULL) {
ipxstat.ipxs_noroute++;
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 | IFF_LOOPBACK)) == 0) {
error = EADDRNOTAVAIL;
goto bad;
}
if ((flags & IPX_ALLOWBROADCAST) == 0) {
error = EACCES;
goto bad;
}
m0->m_flags |= M_BCAST;
}
if (htons(ipx->ipx_len) <= ifp->if_mtu) {
ipxstat.ipxs_localout++;
if (ipx_copy_output) {
ipx_watch_output(m0, ifp);
}
error = (*ifp->if_output)(ifp, m0,
(struct sockaddr *)dst, ro->ro_rt);
goto done;
} else {
ipxstat.ipxs_mtutoosmall++;
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 != NULL) {
RTFREE(ro->ro_rt);
ro->ro_rt = NULL;
}
return (error);
}
/*
* This will broadcast the type 20 (Netbios) packet to all the interfaces
* that have ipx configured and isn't in the list yet.
*/
int
ipx_output_type20(m)
struct mbuf *m;
{
register struct ipx *ipx;
union ipx_net *nbnet;
struct ipx_ifaddr *ia, *tia = NULL;
int error = 0;
struct mbuf *m1;
int i;
struct ifnet *ifp;
struct sockaddr_ipx dst;
/*
* We have to get to the 32 bytes after the ipx header also, so
* that we can fill in the network address of the receiving
* interface.
*/
if ((m->m_flags & M_EXT || m->m_len < (sizeof(struct ipx) + 32)) &&
(m = m_pullup(m, sizeof(struct ipx) + 32)) == NULL) {
ipxstat.ipxs_toosmall++;
return (0);
}
ipx = mtod(m, struct ipx *);
nbnet = (union ipx_net *)(ipx + 1);
if (ipx->ipx_tc >= 8)
goto bad;
/*
* Now see if we have already seen this.
*/
for (ia = ipx_ifaddr; ia != NULL; ia = ia->ia_next)
if(ia->ia_ifa.ifa_ifp == m->m_pkthdr.rcvif) {
if(tia == NULL)
tia = ia;
for (i=0;i<ipx->ipx_tc;i++,nbnet++)
if(ipx_neteqnn(ia->ia_addr.sipx_addr.x_net,
*nbnet))
goto bad;
}
/*
* Don't route the packet if the interface where it come from
* does not have an IPX address.
*/
if(tia == NULL)
goto bad;
/*
* Add our receiving interface to the list.
*/
nbnet = (union ipx_net *)(ipx + 1);
nbnet += ipx->ipx_tc;
*nbnet = tia->ia_addr.sipx_addr.x_net;
/*
* Increment the hop count.
*/
ipx->ipx_tc++;
ipxstat.ipxs_forward++;
/*
* Send to all directly connected ifaces not in list and
* not to the one it came from.
*/
m->m_flags &= ~M_BCAST;
bzero(&dst, sizeof(dst));
dst.sipx_family = AF_IPX;
dst.sipx_len = 12;
dst.sipx_addr.x_host = ipx_broadhost;
for (ia = ipx_ifaddr; ia != NULL; ia = ia->ia_next)
if(ia->ia_ifa.ifa_ifp != m->m_pkthdr.rcvif) {
nbnet = (union ipx_net *)(ipx + 1);
for (i=0;i<ipx->ipx_tc;i++,nbnet++)
if(ipx_neteqnn(ia->ia_addr.sipx_addr.x_net,
*nbnet))
goto skip_this;
/*
* Insert the net address of the dest net and
* calculate the new checksum if needed.
*/
ifp = ia->ia_ifa.ifa_ifp;
dst.sipx_addr.x_net = ia->ia_addr.sipx_addr.x_net;
ipx->ipx_dna.x_net = dst.sipx_addr.x_net;
if(ipx->ipx_sum != 0xffff)
ipx->ipx_sum = ipx_cksum(m, ntohs(ipx->ipx_len));
m1 = m_copym(m, 0, M_COPYALL, M_DONTWAIT);
if(m1) {
error = (*ifp->if_output)(ifp, m1,
(struct sockaddr *)&dst, NULL);
/* XXX ipxstat.ipxs_localout++; */
}
skip_this: ;
}
bad:
m_freem(m);
return (error);
}