Commit Graph

90 Commits

Author SHA1 Message Date
Shteryana Shopova
daacddcac8 Add two new flags to if_bridge(4) indicating whether the edge flag
of the bridge port and path cost have been administratively set or
calculated automatically by RSTP.

Make sure to transition from non-edge to edge when the port goes down
and the edge flag was manually set before.
This is needed to comply with the condition
	((!portEnabled && AdminEdge) || ....)
in the Bridge Detection State Machine (IEE802.1D-2004, p. 171).

Reviewed by:	thompsa
Approved by:	bz (mentor)
2006-12-04 14:45:02 +00:00
Shteryana Shopova
b8f45801b0 Fix SIOCGDRVSPEC/BRDGGIFSSTP ioctl: make it copyin() the user
provided buffer length before trying to use it.

Reviewed by:	thompsa
Approved by:	bz (mentor)
MFC after:	3 days
2006-12-03 21:50:57 +00:00
Andrew Thompson
6c32e05ca3 Sync with the OpenBSD port of RSTP
- use flags rather than sperate ioctls for edge, p2p
 - implement p2p and autop2p flags
 - define large pathcost constant as ULL
 - show bridgeid and rootid in ifconfig

Obtained from:	Reyk Floeter <reyk@openbsd.org>
2006-11-27 00:35:40 +00:00
Andrew Thompson
071fff62be use two stage creation of stp ports, this means that the stp variables can be
set before the port is marked STP and they will no longer be overwrittten
2006-11-26 18:43:48 +00:00
Andrew Thompson
3df7fad0cf Add a new address cache type called sticky. On an interface marked sticky any
address learned by the bridge is made permanent, the address will not age out
and most importantly will not migrate to another interface.

This can be used to stop mac address poisoning or clients roaming in much the
same way as static entries without the hassle of preloading the table.
2006-11-09 06:32:38 +00:00
Robert Watson
acd3428b7d Sweep kernel replacing suser(9) calls with priv(9) calls, assigning
specific privilege names to a broad range of privileges.  These may
require some future tweaking.

Sponsored by:           nCircle Network Security, Inc.
Obtained from:          TrustedBSD Project
Discussed on:           arch@
Reviewed (at least in part) by: mlaier, jmg, pjd, bde, ceri,
                        Alex Lyashkov <umka at sevcity dot net>,
                        Skip Ford <skip dot ford at verizon dot net>,
                        Antoine Brodin <antoine dot brodin at laposte dot net>
2006-11-06 13:42:10 +00:00
Christian S.J. Peron
67be76c039 Fix possible leak when bridge is in monitor mode. Use m_freem() which will
free the entire chain, instead of using m_free() which will free just the
mbuf that was passed.

Discussed with:	thompsa
MFC after:	3 days
2006-11-05 17:56:25 +00:00
Andrew Thompson
59ee2183e2 When the packet is for the bridge then note which interface to send the reply
to, previously it was always broadcast to all interfaces (a bug). This is
useful when the bridge is the default gateway and vlans are used to isolate
each client, the reply is now kept private to the vlan which the client
resides.

Reported by:	Jon Otterholm
Tested by:	Jon Otterholm
MFC after:	3 days
2006-11-04 10:40:59 +00:00
Andrew Thompson
3fab76690c Bring in support for the Rapid Spanning Tree Protocol (802.1w).
RSTP provides faster spanning tree convergence, the protocol will exchange
information with neighboring switches to quickly transition to forwarding
without creating loops. The code will default to RSTP mode but will downgrade
any port connected to a legacy STP network so is fully backward compatible.

Reviewed by:	syrinx
Tested by:	syrinx
2006-11-01 09:07:47 +00:00
Andrew Thompson
8408ecd6d8 Use LIST_FOREACH_SAFE instead of a hand rolled version. 2006-10-09 00:49:57 +00:00
Andrew Thompson
0a6f8a5050 Revert r1.80 as the ethernet header was inadvertently stripped from ARP
packets. Reimplement this correctly and use a sysctl that defaults to off so
the user doesnt get any suprises if ipfw blocks the ARP packet.

MFC after:	3 days
2006-09-22 21:57:52 +00:00
Andrew Thompson
781dd9ae05 Rearrange things so that ARP packets can be filtered or rate limited with IPFW.
Requested by:	Jon Otterholm
Tested by:	Jon Otterholm
2006-09-17 08:20:56 +00:00
Andrew Thompson
4ec528c7a4 The bridge cant hear its own transmissions so set IFF_SIMPLEX.
PR:		kern/102361
Tested by:	Radim Kolar <hsn@netmag.cz>
MFC after:	3 days
2006-08-25 20:11:56 +00:00
Andrew Thompson
705e3bd63b Remove unneeded asserts from bridge_ioctl_* since these are just
extensions of bridge_ioctl() which has the correct locking.
2006-08-17 11:16:02 +00:00
Andrew Thompson
ff2cdcff19 Remove two lock asserts that are unneeded due to subsequent unlocks. 2006-08-17 10:52:36 +00:00
Andrew Thompson
b34b8d6783 Call bridge_span before dropping the lock.
MFC after:	5 days
2006-08-17 10:18:31 +00:00
Andrew Thompson
73d480ae4c - Use the new bridgestp callback to once again flush our bridge routes when an
interface is disabled.
- Log port changes to syslog, defaulting to off
2006-08-02 03:54:28 +00:00
Andrew Thompson
fc5b6202ab Tell bridgestp that we are about to free the memory so it can cleanup. 2006-08-02 02:59:24 +00:00
Andrew Thompson
51383c37cd Add some statistics that are needed to support RFC4188 as part of the SoC2006
work on a bridge monitoring module for BSNMP.

Submitted by:	shteryana (SoC 2006)
2006-07-31 20:24:46 +00:00
Andrew Thompson
9674cf0e27 Remove the dependency of bridgestp.h on if_bridgevar.h by moving a couple of
private structures to if_bridge.c.
2006-07-27 21:01:48 +00:00
Andrew Thompson
a4eb85b6ac bridgestp is now a seperate module. 2006-07-26 22:15:15 +00:00
Andrew Thompson
7d4a207cba Remove stp variables that are already initialised in bstp_attach(). 2006-07-26 20:56:02 +00:00
Andrew Thompson
96e47153ea /tmp/cvsuusTrc 2006-07-26 10:43:02 +00:00
Andrew Thompson
e61a82f3e3 Remove variables that are overridden by ether_ifattach(). This clears up any
confusion especially as *if_output was pointed to a different function.
2006-07-26 09:41:04 +00:00
Sam Leffler
6b7330e2d4 Revise network interface cloning to take an optional opaque
parameter that can specify configuration parameters:
o rev cloner api's to add optional parameter block
o add SIOCCREATE2 that accepts parameter data
o rev vlan support to use new api (maintain old code)

Reviewed by:	arch@
2006-07-09 06:04:01 +00:00
Andrew Thompson
690d79381a Allow gif interfaces to be added as span ports, the user may want to send a
copy of all packets to the other side of the world.
2006-06-20 21:28:18 +00:00
Andrew Thompson
615fccc52b Fix spelling mistake in comment. 2006-06-19 02:25:11 +00:00
Andrew Thompson
80829fccd7 Use bit operations to get a locally administered address rather than using a
hardcoded OUI code.
2006-06-12 22:43:37 +00:00
Andrew Thompson
b3a1f9373a Allow bridge and carp to play nicely together by returning the packet if its
destined for a carp interface.

Obtained from:	OpenBSD
MFC after:	2 weeks
2006-06-08 23:40:16 +00:00
Andrew Thompson
dc1b1b7b6a Fix style(9) nits, whitespace and parentheses. 2006-05-16 22:50:41 +00:00
Daniel Hartmeier
2557a639a5 Recalculate IP checksum after running pfil hooks.
Reviewed by:	thompsa
Tested by:	Adam McDougall <mcdouga9@egr.msu.edu>
2006-05-15 11:49:01 +00:00
Andrew Thompson
7f87a57ca3 Add support for fragmenting ipv4 packets.
The packet filter may reassemble the ip fragments and return a packet that is
larger than the MTU of the sending interface. There is no check for DF or icmp
replies as we can only get a large packet to fragment by reassembling a
previous fragment, and this only happens after a call to pfil(9).

Obtained from:	OpenBSD (mostly)
Glanced at by:	mlaier
MFC after:	1 month
2006-04-29 05:37:25 +00:00
Andrew Thompson
64cb85059e Assert that the mbuf is not shared to ensure problems like the last commit are
not reintroduced.
2006-03-26 20:52:47 +00:00
Roman Kurakin
5cb7f13aee m_dup () packet not m_copypacket () since we will modify it. For more
details see PR kern/94448.

PR:     kern/94448

Original patch: Eygene A. Ryabinkin <rea-fbsd at rea dot mbslab dot kiae dot ru>Final patch:    thompsa@
Tested by:      thompsa@, Eygene A. Ryabinkin

MFC after:      7 days
2006-03-23 22:57:10 +00:00
Andrew Thompson
158a726c96 Since we are using random ethernet addresses for the bridge, it is possible
that we might have address collisions, so make sure that this hardware address
isn't already in use on another bridge.

Submitted by:	csjp
MFC after:	1 month
2006-03-03 09:12:21 +00:00
Christian S.J. Peron
6f75ef188b Slightly re-worked bpf(4) code associated with bridging: if we have a
destination interface as a member of our bridge or this is a unicast packet,
push it through the bpf(4) machinery.

For broadcast or multicast packets, don't bother with the bpf(4) because it will
be re-injected into ether_input. We do this before we pass the packets through
the pfil(9) framework, as it is possible that pfil(9) will drop the packet or
possibly modify it, making it very difficult to debug firewall issues on the
bridge.

Further, implemented IFF_MONITOR for bridge interfaces. This does much the same
thing that it does for regular network interfaces: it pushes the packet to any
bpf(4) peers and then returns. This bypasses all of the bridge machinery,
saving mutex acquisitions, list traversals, and other operations performed by
the bridging code.

This change to the bridging code is useful in situations where individuals use a
bridge to multiplex RX/TX signals from two interfaces, as is required by some
network taps for de-multiplexing links and transmitting the RX/TX signals
out through two separate interfaces. This behaviour is quite common for network
taps monitoring links, especially for certain manufacturers.

Reviewed by:	thompsa
MFC after:	1 month
Sponsored by:	Seccuris Labs
2006-03-03 05:58:18 +00:00
Oleg Bulyzhin
3ecf1851df Properly initialize args structure before passing it to ipfw_chk(): having
uninitialized args.inp is unhealthy for uid/gid/jail ipfw rules.

PR:		kern/92589
Approved by:	glebius (mentor)
MFC after:	1 week
2006-02-03 23:03:07 +00:00
Christian S.J. Peron
f5cdbcf14c Use PFIL_HOOKED macros in if_bridge and pass the right argument to
rw_assert. This un-breaks the build.

Submitted by:	Kostik Belousov
Pointy hat to:	csjp
2006-02-02 16:41:20 +00:00
Andrew Thompson
6637e0f390 Fix two bugs with the bridge
- code expects memcmp() to return a signed value, our memcmp() returns 0 if
   args are equal and > 0 if not.

 - It's possible to hijack interface for static entry. If bridge recieves
   packet from interface marked as learning it will replace the bridge_rtnode
   entry for the source address even if such entry marked as static.

Submitted by:	Gleb Kurtsov <k-gleb yandex.ru>
MFC after:	3 days
2006-01-31 21:21:28 +00:00
Colin Percival
02d4ab93fb Make sure buffers in if_bridge are fully initialized before copying
them to userland.

Security:	FreeBSD-SA-06:06.kmem
2006-01-25 10:00:40 +00:00
Andrew Thompson
7c2fb83a0b Add code that clears certain capabilities from the member interface, these are
restored when its removed from the bridge.

At the moment we only clear IFCAP_TXCSUM. Since a locally generated packet on
the bridge may be sent out any one or more interfaces it cant be assumed that
every card does hardware csums. Most bridges don't generate a lot of traffic
themselves so turning off offloading won't hurt, bridged packets are
unaffected.

Tested by:	Bruce Walker (bmw borderware.com)
MFC after:	5 days
2006-01-14 03:51:31 +00:00
Andrew Thompson
f0feaf4f19 Fix a brain-o in the last commit, the conditional was always false. 2006-01-02 23:02:43 +00:00
Andrew Thompson
94e45ae5e8 Reorganise bridge_rtupdate slightly to reduce duplication. 2006-01-02 22:44:54 +00:00
Andrew Thompson
ef9ac7c49a Reset the route expiry time on each update rather than always letting them get
GC'd and recreated.
2006-01-02 22:29:41 +00:00
Andrew Thompson
bc9f74c7cb It is better to use time_uptime here since it is monotonic.
Pointed out by:	glebius
2006-01-02 22:23:03 +00:00
Andrew Thompson
ec311647fb Minor whitespace cleanup. 2006-01-02 09:50:34 +00:00
Andrew Thompson
f595d62759 Read time_second directly rather than calling getmicrotime().
Obtained from:	DragonflyBSD
2006-01-02 09:36:53 +00:00
Andrew Thompson
a47f91cdc4 When pfil(9) is enabled the bridge only considers ETHERTYPE_ARP, ETHERTYPE_IP and
ETHERTYPE_IPV6 frames. Change this to be a sysctl knob so that is able to still
bridge non-IP packets if desired.

Also return early if all pfil_* sysctls are turned off, the user obviously does
not want to filter on the bridge.
2005-12-29 09:39:15 +00:00
Andrew Thompson
73ff045c57 Add RFC 3378 EtherIP support. This change makes it possible to add gif
interfaces to bridges, which will then send and receive IP protocol 97 packets.
Packets are Ethernet frames with an EtherIP header prepended.

Obtained from:	NetBSD
MFC after:	2 weeks
2005-12-21 21:29:45 +00:00
Andrew Thompson
1e4200620a As of r1.21 all broadcast packets are reprocessed by ether_input as arriving on
the bridge, this caused these packets to show up twice via bpf. Do not process
them twice with BPF_TAP.

MFC after:	3 days
2005-12-21 09:39:59 +00:00