mirror of
https://github.com/freebsd/freebsd-src
synced 2024-09-22 17:54:52 +00:00
Add preliminary support for IEEE 802.1Q VLAN tagging. It doesn't actually
work reliably yet (I've had panics), but it does seem to occasionally be able to transmit and receive syntactically-correct packets. Also fixes one of if_ethersubr.c's legion style bugs, and removes the hostcache code from standard kernels---the code that depends on it is not going to happen any time soon, I'm afraid.
This commit is contained in:
Garrett Wollman
parent
4641c8ac1d
commit
2cc2df490e
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=34649
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@ -197,7 +197,7 @@ msdosfs/msdosfs_vnops.c optional msdosfs
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net/bpf.c optional bpfilter
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net/bpf_filter.c optional bpfilter
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net/bsd_comp.c optional ppp_bsdcomp
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net/hostcache.c standard
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#net/hostcache.c standard
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net/if.c standard
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net/if_atmsubr.c optional atm
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net/if_disc.c optional disc
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@ -210,6 +210,7 @@ net/if_ppp.c optional ppp
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net/if_sl.c optional sl
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net/if_spppsubr.c optional sppp
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net/if_tun.c optional tun
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net/if_vlan.c optional vlan
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net/ppp_deflate.c optional ppp_deflate
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net/ppp_tty.c optional ppp
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net/radix.c standard
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@ -254,7 +255,7 @@ netinet/if_atm.c optional atm
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netinet/if_ether.c optional ether
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netinet/igmp.c optional inet
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netinet/in.c optional inet
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netinet/in_hostcache.c optional inet
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#netinet/in_hostcache.c optional inet
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netinet/in_pcb.c optional inet
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netinet/in_proto.c optional inet
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netinet/in_rmx.c optional inet
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@ -1,7 +1,7 @@
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/*
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* Fundamental constants relating to ethernet.
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*
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* $Id$
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* $Id: ethernet.h,v 1.8 1997/02/22 09:40:58 peter Exp $
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*
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*/
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@ -64,6 +64,7 @@ struct ether_addr {
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#define ETHERTYPE_IP 0x0800 /* IP protocol */
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#define ETHERTYPE_ARP 0x0806 /* Addr. resolution protocol */
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#define ETHERTYPE_REVARP 0x8035 /* reverse Addr. resolution protocol */
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#define ETHERTYPE_VLAN 0x8100 /* IEEE 802.1Q VLAN tagging */
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#define ETHERTYPE_LOOPBACK 0x9000 /* used to test interfaces */
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/* XXX - add more useful types here */
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@ -31,7 +31,7 @@
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* SUCH DAMAGE.
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*
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* @(#)if_ethersubr.c 8.1 (Berkeley) 6/10/93
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* $Id: if_ethersubr.c,v 1.44 1998/01/31 07:23:14 eivind Exp $
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* $Id: if_ethersubr.c,v 1.45 1998/02/20 13:11:49 bde Exp $
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*/
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#include "opt_atalk.h"
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@ -97,9 +97,14 @@ extern struct ifqueue pkintrq;
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#define llc_snap_org_code llc_un.type_snap.org_code
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#define llc_snap_ether_type llc_un.type_snap.ether_type
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extern u_char at_org_code[ 3 ];
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extern u_char aarp_org_code[ 3 ];
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#endif NETATALK
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extern u_char at_org_code[3];
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extern u_char aarp_org_code[3];
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#endif /* NETATALK */
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#include "vlan.h"
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#if NVLAN > 0
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#include <net/if_vlan_var.h>
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#endif /* NVLAN > 0 */
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static int ether_resolvemulti __P((struct ifnet *, struct sockaddr **,
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struct sockaddr *));
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@ -473,16 +478,26 @@ ether_input(ifp, eh, m)
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return;
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}
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ifp->if_ibytes += m->m_pkthdr.len + sizeof (*eh);
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if (bcmp((caddr_t)etherbroadcastaddr, (caddr_t)eh->ether_dhost,
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sizeof(etherbroadcastaddr)) == 0)
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m->m_flags |= M_BCAST;
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else if (eh->ether_dhost[0] & 1)
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m->m_flags |= M_MCAST;
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if (eh->ether_dhost[0] & 1) {
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if (bcmp((caddr_t)etherbroadcastaddr, (caddr_t)eh->ether_dhost,
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sizeof(etherbroadcastaddr)) == 0)
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m->m_flags |= M_BCAST;
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else
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m->m_flags |= M_MCAST;
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}
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if (m->m_flags & (M_BCAST|M_MCAST))
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ifp->if_imcasts++;
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ether_type = ntohs(eh->ether_type);
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#if NVLAN > 0
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if (ether_type == vlan_proto) {
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if (vlan_input(eh, m) < 0)
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ifp->if_data.ifi_noproto++;
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return;
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}
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#endif /* NVLAN > 0 */
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switch (ether_type) {
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#ifdef INET
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case ETHERTYPE_IP:
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363
sys/net/if_vlan.c
Normal file
363
sys/net/if_vlan.c
Normal file
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@ -0,0 +1,363 @@
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/*
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* Copyright 1998 Massachusetts Institute of Technology
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*
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* Permission to use, copy, modify, and distribute this software and
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* its documentation for any purpose and without fee is hereby
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* granted, provided that both the above copyright notice and this
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* permission notice appear in all copies, that both the above
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* copyright notice and this permission notice appear in all
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* supporting documentation, and that the name of M.I.T. not be used
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* in advertising or publicity pertaining to distribution of the
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* software without specific, written prior permission. M.I.T. makes
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* no representations about the suitability of this software for any
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* purpose. It is provided "as is" without express or implied
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* warranty.
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*
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* THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
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* ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
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* SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* 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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* $Id$
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*/
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/*
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* if_vlan.c - pseudo-device driver for IEEE 802.1Q virtual LANs.
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* Might be extended some day to also handle IEEE 802.1p priority
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* tagging. This is sort of sneaky in the implementation, since
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* we need to pretend to be enough of an Ethernet implementation
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* to make arp work. The way we do this is by telling everyone
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* that we are an Ethernet, and then catch the packets that
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* ether_output() left on our output queue queue when it calls
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* if_start(), rewrite them for use by the real outgoing interface,
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* and ask it to send them.
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*/
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#include "vlan.h"
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#if NVLAN > 0
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#include "opt_inet.h"
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#include "bpfilter.h"
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/mbuf.h>
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#include <sys/socket.h>
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#include <sys/sockio.h>
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#include <sys/sysctl.h>
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#include <sys/systm.h>
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#if NBPFILTER > 0
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#include <net/bpf.h>
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#endif
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#include <net/ethernet.h>
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#include <net/if.h>
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#include <net/if_arp.h>
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#include <net/if_dl.h>
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#include <net/if_types.h>
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#include <net/if_vlan_var.h>
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#ifdef INET
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#include <netinet/in.h>
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#include <netinet/if_ether.h>
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#endif
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SYSCTL_NODE(_net_link, IFT_8021_VLAN, vlan, CTLFLAG_RW, 0, "IEEE 802.1Q VLAN");
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SYSCTL_NODE(_net_link_vlan, PF_LINK, link, CTLFLAG_RW, 0, "for consistency");
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u_int vlan_proto = ETHERTYPE_VLAN;
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SYSCTL_INT(_net_link_vlan_link, VLANCTL_PROTO, proto, CTLFLAG_RW, &vlan_proto,
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0, "Ethernet protocol used for VLAN encapsulation");
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static struct ifvlan ifv_softc[NVLAN];
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static void vlan_start(struct ifnet *ifp);
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static void vlan_ifinit(void *foo);
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static int vlan_ioctl(struct ifnet *ifp, int cmd, caddr_t addr);
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static void
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vlaninit(void *dummy)
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{
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int i;
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for (i = 0; i < NVLAN; i++) {
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struct ifnet *ifp = &ifv_softc[i].ifv_if;
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ifp->if_softc = &ifv_softc[i];
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ifp->if_name = "vlan";
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ifp->if_unit = i;
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/* NB: flags are not set here */
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ifp->if_linkmib = &ifv_softc[i].ifv_mib;
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ifp->if_linkmiblen = sizeof ifv_softc[i].ifv_mib;
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/* NB: mtu is not set here */
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ifp->if_init = vlan_ifinit;
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ifp->if_start = vlan_start;
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ifp->if_ioctl = vlan_ioctl;
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ifp->if_output = ether_output;
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if_attach(ifp);
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ether_ifattach(ifp);
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#if NBPFILTER > 0
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bpfattach(ifp, DLT_EN10MB, sizeof(struct ether_header));
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#endif
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/* Now undo some of the damage... */
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ifp->if_data.ifi_type = IFT_8021_VLAN;
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ifp->if_data.ifi_hdrlen = EVL_ENCAPLEN;
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ifp->if_resolvemulti = 0;
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}
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}
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PSEUDO_SET(vlaninit, if_vlan);
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static void
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vlan_ifinit(void *foo)
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{
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;
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}
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static void
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vlan_start(struct ifnet *ifp)
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{
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struct ifvlan *ifv;
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struct ifnet *p;
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struct ether_vlan_header *evl;
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struct mbuf *m;
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ifv = ifp->if_softc;
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p = ifv->ifv_p;
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ifp->if_flags |= IFF_OACTIVE;
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for (;;) {
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IF_DEQUEUE(&ifp->if_snd, m);
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if (m == 0)
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break;
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#if NBPFILTER > 0
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if (ifp->if_bpf)
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bpf_mtap(m, ifp);
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#endif /* NBPFILTER > 0 */
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M_PREPEND(m, EVL_ENCAPLEN, M_DONTWAIT);
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if (m == 0)
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continue;
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/* M_PREPEND takes care of m_len, m_pkthdr.len for us */
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/*
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* Transform the Ethernet header into an Ethernet header
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* with 802.1Q encapsulation.
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*/
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bcopy(mtod(m, char *) + EVL_ENCAPLEN, mtod(m, char *),
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sizeof(struct ether_header));
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evl = mtod(m, struct ether_vlan_header *);
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evl->evl_proto = evl->evl_encap_proto;
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evl->evl_encap_proto = htons(vlan_proto);
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evl->evl_tag = htons(ifv->ifv_tag);
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printf("vlan_start: %*D\n", sizeof *evl, (char *)evl, ":");
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/*
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* Send it, precisely as ether_output() would have.
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* We are already running at splimp.
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*/
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if (IF_QFULL(&p->if_snd)) {
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IF_DROP(&p->if_snd);
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/* XXX stats */
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}
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IF_ENQUEUE(&p->if_snd, m);
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if ((p->if_flags & IFF_OACTIVE) == 0)
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p->if_start(p);
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}
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ifp->if_flags &= ~IFF_OACTIVE;
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}
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int
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vlan_input(struct ether_header *eh, struct mbuf *m)
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{
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int i;
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struct ifvlan *ifv;
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for (i = 0; i < NVLAN; i++) {
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ifv = &ifv_softc[i];
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if (m->m_pkthdr.rcvif == ifv->ifv_p
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&& (EVL_VLANOFTAG(ntohs(*mtod(m, u_int16_t *)))
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== ifv->ifv_tag))
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break;
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}
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|
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if (i >= NVLAN || (ifv->ifv_if.if_flags & IFF_UP) == 0) {
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m_freem(m);
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return -1; /* so ether_input can take note */
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}
|
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|
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/*
|
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* Having found a valid vlan interface corresponding to
|
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* the given source interface and vlan tag, remove the
|
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* encapsulation, and run the real packet through
|
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* ether_input() a second time (it had better be
|
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* reentrant!).
|
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*/
|
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m->m_pkthdr.rcvif = &ifv->ifv_if;
|
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eh->ether_type = mtod(m, u_int16_t *)[1];
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m->m_data += EVL_ENCAPLEN;
|
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m->m_len -= EVL_ENCAPLEN;
|
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m->m_pkthdr.len -= EVL_ENCAPLEN;
|
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|
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#if NBPFILTER > 0
|
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if (ifv->ifv_if.if_bpf) {
|
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/*
|
||||
* Do the usual BPF fakery. Note that we don't support
|
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* promiscuous mode here, since it would require the
|
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* drivers to know about VLANs and we're not ready for
|
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* that yet.
|
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*/
|
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struct mbuf m0;
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m0.m_next = m;
|
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m0.m_len = sizeof(struct ether_header);
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m0.m_data = (char *)eh;
|
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bpf_mtap(&ifv->ifv_if, &m0);
|
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}
|
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#endif
|
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ether_input(&ifv->ifv_if, eh, m);
|
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return 0;
|
||||
}
|
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|
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static int
|
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vlan_config(struct ifvlan *ifv, struct ifnet *p)
|
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{
|
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struct ifaddr *ifa1, *ifa2;
|
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struct sockaddr_dl *sdl1, *sdl2;
|
||||
|
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if (p->if_data.ifi_type != IFT_ETHER)
|
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return EPROTONOSUPPORT;
|
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if (ifv->ifv_p)
|
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return EBUSY;
|
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ifv->ifv_p = p;
|
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if (p->if_data.ifi_hdrlen == sizeof(struct ether_vlan_header))
|
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ifv->ifv_if.if_mtu = p->if_mtu;
|
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else
|
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ifv->ifv_if.if_mtu = p->if_data.ifi_mtu - EVL_ENCAPLEN;
|
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|
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/*
|
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* NB: we don't support multicast at this point.
|
||||
*/
|
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ifv->ifv_if.if_flags = (p->if_flags & ~IFF_MULTICAST); /* XXX */
|
||||
|
||||
/*
|
||||
* Set up our ``Ethernet address'' to reflect the underlying
|
||||
* physical interface's.
|
||||
*/
|
||||
ifa1 = ifnet_addrs[ifv->ifv_if.if_index - 1];
|
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ifa2 = ifnet_addrs[p->if_index - 1];
|
||||
sdl1 = (struct sockaddr_dl *)ifa1->ifa_addr;
|
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sdl2 = (struct sockaddr_dl *)ifa2->ifa_addr;
|
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sdl1->sdl_type = IFT_ETHER;
|
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sdl1->sdl_alen = ETHER_ADDR_LEN;
|
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bcopy(LLADDR(sdl2), LLADDR(sdl1), ETHER_ADDR_LEN);
|
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bcopy(LLADDR(sdl2), ifv->ifv_ac.ac_enaddr, ETHER_ADDR_LEN);
|
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return 0;
|
||||
}
|
||||
|
||||
static int
|
||||
vlan_ioctl(struct ifnet *ifp, int cmd, caddr_t data)
|
||||
{
|
||||
struct ifaddr *ifa;
|
||||
struct ifnet *p;
|
||||
struct ifreq *ifr;
|
||||
struct ifvlan *ifv;
|
||||
struct vlanreq vlr;
|
||||
int error = 0;
|
||||
|
||||
ifr = (struct ifreq *)data;
|
||||
ifa = (struct ifaddr *)data;
|
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ifv = ifp->if_softc;
|
||||
|
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switch (cmd) {
|
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case SIOCSIFADDR:
|
||||
ifp->if_flags |= IFF_UP;
|
||||
|
||||
switch (ifa->ifa_addr->sa_family) {
|
||||
#ifdef INET
|
||||
case AF_INET:
|
||||
arp_ifinit(&ifv->ifv_ac, ifa);
|
||||
break;
|
||||
#endif
|
||||
default:
|
||||
break;
|
||||
}
|
||||
break;
|
||||
|
||||
case SIOCGIFADDR:
|
||||
{
|
||||
struct sockaddr *sa;
|
||||
|
||||
sa = (struct sockaddr *) &ifr->ifr_data;
|
||||
bcopy(((struct arpcom *)ifp->if_softc)->ac_enaddr,
|
||||
(caddr_t) sa->sa_data, ETHER_ADDR_LEN);
|
||||
}
|
||||
break;
|
||||
|
||||
case SIOCSIFMTU:
|
||||
/*
|
||||
* Set the interface MTU.
|
||||
*/
|
||||
if (ifr->ifr_mtu > ETHERMTU) {
|
||||
error = EINVAL;
|
||||
} else {
|
||||
ifp->if_mtu = ifr->ifr_mtu;
|
||||
}
|
||||
break;
|
||||
|
||||
case SIOCSETVLAN:
|
||||
error = copyin(ifr->ifr_data, &vlr, sizeof vlr);
|
||||
if (error)
|
||||
break;
|
||||
if (vlr.vlr_parent[0] == '\0') {
|
||||
ifv->ifv_p = 0;
|
||||
if_down(ifp);
|
||||
break;
|
||||
}
|
||||
p = ifunit(vlr.vlr_parent);
|
||||
if (p == 0) {
|
||||
error = ENOENT;
|
||||
break;
|
||||
}
|
||||
error = vlan_config(ifv, p);
|
||||
if (error)
|
||||
break;
|
||||
ifv->ifv_tag = vlr.vlr_tag;
|
||||
break;
|
||||
|
||||
case SIOCGETVLAN:
|
||||
bzero(&vlr, sizeof vlr);
|
||||
if (ifv->ifv_p) {
|
||||
sprintf(vlr.vlr_parent, "%s%d", ifv->ifv_p->if_name,
|
||||
ifv->ifv_p->if_unit);
|
||||
vlr.vlr_tag = ifv->ifv_tag;
|
||||
}
|
||||
error = copyout(&vlr, ifr->ifr_data, sizeof vlr);
|
||||
break;
|
||||
|
||||
case SIOCSIFFLAGS:
|
||||
/*
|
||||
* We don't support all-multicast or promiscuous modes
|
||||
* right now because it would require help from the
|
||||
* underlying drivers, which hasn't been implemented.
|
||||
*/
|
||||
if (ifr->ifr_flags & (IFF_PROMISC|IFF_ALLMULTI)) {
|
||||
ifp->if_flags &= ~(IFF_PROMISC|IFF_ALLMULTI);
|
||||
error = EINVAL;
|
||||
}
|
||||
break;
|
||||
|
||||
/* NB: this will reject multicast state changes */
|
||||
default:
|
||||
error = EINVAL;
|
||||
}
|
||||
return error;
|
||||
}
|
||||
|
||||
#endif /* NVLAN > 0 */
|
||||
84
sys/net/if_vlan_var.h
Normal file
84
sys/net/if_vlan_var.h
Normal file
|
|
@ -0,0 +1,84 @@
|
|||
/*
|
||||
* Copyright 1998 Massachusetts Institute of Technology
|
||||
*
|
||||
* Permission to use, copy, modify, and distribute this software and
|
||||
* its documentation for any purpose and without fee is hereby
|
||||
* granted, provided that both the above copyright notice and this
|
||||
* permission notice appear in all copies, that both the above
|
||||
* copyright notice and this permission notice appear in all
|
||||
* supporting documentation, and that the name of M.I.T. not be used
|
||||
* in advertising or publicity pertaining to distribution of the
|
||||
* software without specific, written prior permission. M.I.T. makes
|
||||
* no representations about the suitability of this software for any
|
||||
* purpose. It is provided "as is" without express or implied
|
||||
* warranty.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
|
||||
* ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
|
||||
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
||||
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
|
||||
* SHALL M.I.T. 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.
|
||||
*
|
||||
* $Id$
|
||||
*/
|
||||
|
||||
#ifndef _NET_IF_VLAN_VAR_H_
|
||||
#define _NET_IF_VLAN_VAR_H_ 1
|
||||
|
||||
#ifdef KERNEL
|
||||
struct ifvlan {
|
||||
struct arpcom ifv_ac; /* make this an interface */
|
||||
struct ifnet *ifv_p; /* parent inteface of this vlan */
|
||||
struct ifv_linkmib {
|
||||
int ifvm_parent;
|
||||
u_int16_t ifvm_proto; /* encapsulation ethertype */
|
||||
u_int16_t ifvm_tag; /* tag to apply on packets leaving if */
|
||||
} ifv_mib;
|
||||
};
|
||||
#define ifv_if ifv_ac.ac_if
|
||||
#define ifv_tag ifv_mib.ifvm_tag
|
||||
#endif /* KERNEL */
|
||||
|
||||
struct ether_vlan_header {
|
||||
u_char evl_dhost[ETHER_ADDR_LEN];
|
||||
u_char evl_shost[ETHER_ADDR_LEN];
|
||||
u_int16_t evl_encap_proto;
|
||||
u_int16_t evl_tag;
|
||||
u_int16_t evl_proto;
|
||||
};
|
||||
|
||||
#define EVL_VLANOFTAG(tag) ((tag) & 4095)
|
||||
#define EVL_PRIOFTAG(tag) (((tag) >> 13) & 7)
|
||||
#define EVL_ENCAPLEN 4 /* length in octets of encapsulation */
|
||||
|
||||
/* When these sorts of interfaces get their own identifier... */
|
||||
#define IFT_8021_VLAN IFT_PROPVIRTUAL
|
||||
|
||||
/* sysctl(3) tags, for compatibility purposes */
|
||||
#define VLANCTL_PROTO 1
|
||||
#define VLANCTL_MAX 2
|
||||
|
||||
/*
|
||||
* Configuration structure for SIOCSETVLAN and SIOCGETVLAN ioctls.
|
||||
*/
|
||||
struct vlanreq {
|
||||
char vlr_parent[IFNAMSIZ];
|
||||
u_short vlr_tag;
|
||||
};
|
||||
#define SIOCSETVLAN SIOCSIFGENERIC
|
||||
#define SIOCGETVLAN SIOCGIFGENERIC
|
||||
|
||||
#ifdef KERNEL
|
||||
/* shared with if_ethersubr.c: */
|
||||
extern u_int vlan_proto;
|
||||
extern int vlan_input(struct ether_header *eh, struct mbuf *m);
|
||||
#endif
|
||||
|
||||
#endif /* _NET_IF_VLAN_VAR_H_ */
|
||||
Loading…
Reference in a new issue