a0afe699ba
a new rwlock, ipx_ifaddr_rw, wrapped with macros. This locking is necessary but not sufficient, in isolation, to satisfy the stability requirements of a fully parallel IPX input path during interface reconfiguration. MFC after: 3 weeks
285 lines
8.2 KiB
C
285 lines
8.2 KiB
C
/*-
|
|
* 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.
|
|
* 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.
|
|
*
|
|
* Copyright (c) 1995, Mike Mitchell
|
|
*
|
|
* 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("$FreeBSD$");
|
|
|
|
#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>
|
|
|
|
int
|
|
ipx_outputfl(struct mbuf *m0, struct route *ro, int flags)
|
|
{
|
|
struct ipx *ipx = mtod(m0, struct ipx *);
|
|
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_IFADDR_RLOCK();
|
|
ia = ipx_iaonnetof(&ipx->ipx_dna);
|
|
if (ia == NULL) {
|
|
IPX_IFADDR_RUNLOCK();
|
|
ipxstat.ipxs_noroute++;
|
|
error = ENETUNREACH;
|
|
goto bad;
|
|
}
|
|
ifp = ia->ia_ifp;
|
|
IPX_IFADDR_RUNLOCK();
|
|
goto gotif;
|
|
}
|
|
rtalloc_ign(ro, 0);
|
|
} 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_ign(ro, 0);
|
|
}
|
|
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++;
|
|
error = (*ifp->if_output)(ifp, m0,
|
|
(struct sockaddr *)dst, ro);
|
|
goto done;
|
|
} else {
|
|
ipxstat.ipxs_mtutoosmall++;
|
|
error = EMSGSIZE;
|
|
}
|
|
bad:
|
|
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(struct mbuf *m)
|
|
{
|
|
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.
|
|
*/
|
|
IPX_IFADDR_RLOCK();
|
|
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)) {
|
|
IPX_IFADDR_RUNLOCK();
|
|
goto bad;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Don't route the packet if the interface where it come from
|
|
* does not have an IPX address.
|
|
*/
|
|
if (tia == NULL) {
|
|
IPX_IFADDR_RUNLOCK();
|
|
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: ;
|
|
}
|
|
IPX_IFADDR_RUNLOCK();
|
|
|
|
bad:
|
|
m_freem(m);
|
|
return (error);
|
|
}
|