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When neighbor disable-connected-check was used, bgpd would accept routes
with unconnected nexthop as indended, however those routes would be
invalidated on the next bgp_scan run as that function did not know about
disable-connected-check.
Signed-off-by: Christian Franke <chris@opensourcerouting.org>
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
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switching the socket to blocking may well block the entire bgpd process
for some time if our peer is overloaded (which may well be the original
reason for the NOTIFY)
The error handling is slightly different from the previous ML discussion
on this; buffer exhaustion isn't technically a fatal TCP error, and we
should probably proceed with FSM actions according to a sent NOTIFY
(adjusting timers) even if we didn't manage to get the NOTIFY onto the
wire.
Acked-by: Leonid Rosenboim <lrosenbo@wrs.com>
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
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bgp_interface_down() and bgp_exit() both proceed to delete the address
from bgpd's interface representation, so the second call gets a NULL
result from the hash lookup and subsequently crashes.
Signed-off-by: Rakesh Garimella <rakesh.garimella@sophos.com>
[reformatted]
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
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Keepalives and updates are not expected in OpenSent, prior to receiving
the peer's open message. Terminate the session with the proper
notification.
From: Leonid Rosenboim <lrosenbo@wrs.com>
[split off FSM changes, some reordering & cleanup. read handling needs
to be separately addressed]
Signed-off-by: David Lamparter <equinox@diac24.net>
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By forcing the hash table size to be a power of 2, a potentially
expensive divide can be replaced by a mask operation. Almost all
usage of the hash table was using default size of 1024. Only places
with different size was thread library (1011) and bgp aspath.
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
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This patch resolves the significance of order of group and password
statements.
It prevents passwords from being lost in cases where all
three conditions apply:
1. the peer is member of a group with or without group password
2. the peer has an individual password set
3. the peer is added to a group within an address-family ipv6
section
In addition this patch prevents the same issue in cases, where an IPv4
peer's password is set first and the peer is added to a group
afterwards.
Adding a peer to a group cancels his individual password. Without ipv6
this is not a problem, because choosing the right order of config
statements will do (set password only after adding peer to group).
When adding the peer to a group within the address-family
section, his password is definitely lost. The same workaround (ie.
setting the password after the address-family section) can not be used,
because "show run" will print the configuration statements in the wrong
order.
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
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Commit 8692c50652 introduced a bug where bgpd would crash on
soft-reconfiguration.
This happens e.g. when there are filtered unicast routes because
rn->info is NULL in that case, which the code did not account for.
Reported-by: Paweł Staszewski <pstaszewski@itcare.pl>
Signed-off-by: Christian Franke <chris@opensourcerouting.org>
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
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commit fe9bb64... "bgpd: CVE-2012-1820, DoS in bgp_capability_orf()"
made the length test in bgp_capability_orf_entry() stricter and is now
causing us to refuse (with CEASE) ORF capabilites carrying any excess
data. This does not conform to the robustness principle as laid out by
RFC1122 ("be liberal in what you accept").
Even worse, RFC5291 is quite unclear on how to use the ORF capability
with multiple AFI/SAFIs. It can be interpreted as either "use one
instance, stuff everything in" but also as "use multiple instances".
So, if not for applying robustness, we end up clearing sessions from
implementations going by the former interpretation. (or if anyone dares
add a byte of padding...)
Cc: Denis Ovsienko <infrastation@yandex.ru>
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
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bgp_attr_munge_as4_attrs would previously try to reintegrate an AS4_PATH
with a NULL AS_PATH, leading to a rather nasty SEGV. Let's go by
RFC6793 and treat missing AS_PATH as 0-length AS_PATH, which in turn
means discarding the AS4_PATH.
[NB: we don't actually stick to the actual rule, which is discarding
AS4_PATH if it's longer than AS_PATH; indeed we should probably fix that
too]
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
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Incorporate a patch by Svetozar Mihailov which implements
default-originate route-maps to behave as expected, i.e. allowing
the default route to be advertised conditionally, depending on a
criterion given by the route-map.
I am aware that the performance attributes of the following implementation
are far from optimal. However, this affects only code paths belonging to
a feature that is broken without this patch, therefore, it seems reasonable
to me to have this in the mainline for now.
Cc: Svetozar Mihailov <quagga@j.zarhi.com>
Reported-by: Sébastien Cramatte <scramatte@gmail.com>
Signed-off-by: Christian Franke <chris@opensourcerouting.org>
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
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This pushes out the NOTIFY message before closing a connection.
Previously, the TCP_CORK bandwidth optimization code caused NOTIFY
messages to disappear prior to when the connection is closed.
* bgpd/bgp_packet.c: unset CORK, set NODELAY, and replace
writen() by more correct write()
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
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This reverts commit b07458a055493dd37cb955ae90f11ae8bc334d3a.
On second thought, the right way to do this is with rename(), not by
introducing a lock that can potentially even stall bgpd.
Reported-by: Christian Franke <chris@opensourcerouting.org>
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
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Keep data flowing, uncork after each BGP_WRITE_PACKET_MAX.
This makes TCP send data sooner, since thread may not be scheduled
again for a a longish time because of new UPDATE's coming in.
Signed-off-by: Stephen Hemminger <shemminger@vyatta.org>
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
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The readtime value is for diagnostic, and doesn't have to be highly
accurate. This also fixes a problem where the readtime was being measured
with system clock, but the peer_uptime() was comparing with bgp_clock.
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
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The flag bit BGP_NODE_PROCESS_SCHEDULED is checked but never set.
This causes route node to be scheduled multiple times under load.
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
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Invalid BGP Notification messages should be logged locally, cf.
RFC4271, Sect. 6.4, p 34,
NOTIFICATION Message Error Handling
Current notification for invalid Notification code:
2012/10/10 02:17:54 BGP: message index 10 not found in bgp_notify_msg (max is 8)
2012/10/10 02:17:54 BGP: 192.168.1.1 received NOTIFICATION 10/0 ((no item found)) 0 bytes
the logging should be a bit more clear. The above logging really doesn't
explain much and looks more like a programming error.
[rewrote most of it to get in something I can call a shape -David]
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
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BGP4-ANVL 20.1 ANVL tries to open BGP with version 5 and expects correct
notification in response. Quagga sends notification, but with incorrect
information in it.
The data needs to be a 2-byte value, and for now we respond with 0004 for any
peer version other than 4.
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
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Commit 558d1fec11749d3257e improved bgp_attr_dup so it would be possible
for the caller to provide attr_extra, allowing to use the stack instead
of the heap for operations requiring only a short lived attr.
However, this commit introduced a bug where bgp_attr_dup wouldn't copy
attr_extra at all (but provide a reference to the original) if the
caller provided attr_extra.
Cc: Jorge Boncompte [DTI2] <jorge@dti2.net>
Signed-off-by: Christian Franke <chris@opensourcerouting.org>
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
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Signed-off-by: Christian Franke <chris@opensourcerouting.org>
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
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If a neighbor was in a peer group for any AFI/SAFI, bgpd would never write a
"no neighbor activate" line for IPv4 unicast, so a valid setup like following
could be configured, but not saved:
router bgp 64600
bgp router-id 198.51.100.1
network 198.51.100.0/24
neighbor peers peer-group
neighbor 2001:db8::2 remote-as 64601
no neighbor 2001:db8::2 activate
!
address-family ipv6
network 2001:db8:1::/48
neighbor peers activate
neighbor peers soft-reconfiguration inbound
neighbor 2001:db8::2 peer-group peers
exit-address-family
!
Signed-off-by: Christian Franke <chris@opensourcerouting.org>
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
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In bgp_clear_route_table, moved cleanup code before the allocation
of the work queue items. This returns the memory to the system
allocator before allocating new and might therefore help avoiding
heap fragmentation.
* bgp_route.c: (bgp_clear_route_table) moved code blocks.
Signed-off-by: Jorge Boncompte [DTI2] <jorge@dti2.net>
Reviewed-by: Leonid Rosenboim <Leonid.Rosenboim@windriver.com>
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
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If a peer with soft-reconfiguration configured is cleared, the
function bgp_clear_route_table() doesn't free the bgp_adj_in and bgp_adj_out
structures of route nodes that for some reason, ej. denied by a filter,
don't have routes attached "rn->info == NULL".
Signed-off-by: Jorge Boncompte [DTI2] <jorge@dti2.net>
Reviewed-by: Leonid Rosenboim <Leonid.Rosenboim@windriver.com>
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
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When going through the code to write the documentation for local-as,
I discovered that one of the comments was out-of-date.
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
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Added replace-as modifier for BGP neighbors when using
local-as. If the replace-as modifier is specified, only the
replacement AS as specified by the local-as modifier is
prepended to the AS_PATH, not the process's AS.
In bgp_attr.c, I decided that
if (peer->change_local_as) {
/* If replace-as is specified, we only use the change_local_as when
advertising routes. */
if( ! CHECK_FLAG (peer->flags, PEER_FLAG_LOCAL_AS_REPLACE_AS) ) {
aspath = aspath_add_seq (aspath, peer->local_as);
}
aspath = aspath_add_seq (aspath, peer->change_local_as);
} else {
aspath = aspath_add_seq (aspath, peer->local_as);
}
was clearer than the alternative that didn't duplicate the prepending of the
process's AS:
/* First, append the process local AS unless we have an alternate local_as
* and we're replacing it (as opposed to just prepending it). */
if (! (peer->change_local_as
&& CHECK_FLAG (peer->flags, PEER_FLAG_LOCAL_AS_REPLACE_AS) ) ) {
aspath = aspath_add_seq (aspath, peer->local_as);
}
if (peer->change_local_as)
aspath = aspath_add_seq (aspath, peer->change_local_as);
}
But I could be convinced otherwise.
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
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An ORF (code 3) capability TLV is defined to contain exactly one
AFI/SAFI block. Function bgp_capability_orf(), which parses ORF
capability TLV, uses do-while cycle to call its helper function
bgp_capability_orf_entry(), which actually processes the AFI/SAFI data
block. The call is made at least once and repeated as long as the input
buffer has enough data for the next call.
The helper function, bgp_capability_orf_entry(), uses "Number of ORFs"
field of the provided AFI/SAFI block to verify, if it fits the input
buffer. However, the check is made based on the total length of the ORF
TLV regardless of the data already consumed by the previous helper
function call(s). This way, the check condition is only valid for the
first AFI/SAFI block inside an ORF capability TLV.
For the subsequent calls of the helper function, if any are made, the
check condition may erroneously tell, that the current "Number of ORFs"
field fits the buffer boundary, where in fact it does not. This makes it
possible to trigger an assertion by feeding an OPEN message with a
specially-crafted malformed ORF capability TLV.
This commit fixes the vulnerability by making the implementation follow
the spec.
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flock()ing the BGP dump files helps consumers determine when they're
safe to read.
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
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Use the array_size() helper macro. Replaces several instances of local
macros with the same definition.
Reviewed-by: Scott Feldman <sfeldma@cumulusnetworks.com>
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
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* lib/table.[ch]
- Add a function (route_table_get_next()) to get the route_node in
a tree that succeeds a given prefix in iteration order.
This allows one to reliably walk nodes in a tree while allowing
modifications, and is useful for achieving scale and
performance. Other approaches are also possible -- the main plus
point of this one is that it does not require any state about
the walk to be maintained in the table data structures.
- Add an iterator for walking the nodes in a tree. This introduces
a new structure (route_table_iter_t) and the following main
functions.
route_table_iter_init()
route_table_iter_pause()
route_table_iter_next()
route_table_iter_cleanup()
The iterator normally uses node pointers and the existing
route_next() function to walk nodes efficiently. When an
iteration is 'paused' with route_table_iter_pause(), it stores
the last prefix processed. The next call to
route_table_iter_next() transparently invokes
route_table_get_next() with the prefix to resume iteration.
* bgpd/bgp_table.[ch]
Add wrappers for the new table features described above.
* tests/table_test.c
Add tests for the new table code.
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
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Make the BGP table code a thin wrapper around the table implementation
in libzebra.
* bgpd/bgp_table.[ch]
- Use the ROUTE_NODE_FIELDS macro to embed the fields of a
route_node in the bgp_node structure.
- Add a route_table field to the bgp_table structure.
Initialize the route_table with a delegate, such that the nodes
in the table are bgp_node structures.
- Add inline wrappers that call route_table functions underneath,
and accept/return the correct BGP types.
* bgpd/bgp_route.c
Change some code to use inline wrappers instead of accessing
fields of nodes/tables directly. The latter does not always work
because the types of some fields need to be translated now.
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
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Most table handlers do not expect to be given an OID whose prefix is
outside what they can handle. This is not a problem with the SMUX
implementation since it always correct the OID such that the prefix
matches. However, this is not the case for the AgentX
implementation. A new function, smux_header_table() is used to do this
normalization.
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smux_trap() signature has been changed to provide appropriate level
information to send SNMPv2 notifications. This includes the addition
of the enterprise OID to use (from which is derived the SNMP trap OID)
and the MIB registry to locate the appropriate function for variable
bindings provided by the trap.
The SMUX implementation has been updated but ignore the provided
enterprise OID. Instead, it still uses the SMUX peer OID to keep
compatibility with previous versions of Quagga. The SMUX
implementation also ignores the provided MIB registry since it uses
smux_get() function to grab the appropriate values. This is not
possible with the AgentX implementation since there is no such
function provided by NetSNMP.
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This element was not unused.
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smux_trap() contains an argument whose use appears to be to set
sysUpTime.0/timestamp field in SNMP trap. However, this value is not
used in smux_trap(). Moreover, it is expected that this field is the
value of sysUpTime.0 when the trap was sent and not any other time
related to the trap. To avoid any confusion, we remove this field from
the signature of the function.
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The correct method to link to NetSNMP is to use net-snmp-config (which
is like pkg-config). Explicit link to libcrypto is also dropped
(NetSNMP libs are linked to libcrypto, no need to link Quagga to
it). Moreover, @SNMP_INCLUDES@ is dropped because useless. Due to a
bug in configure.ac, it was properly populated.
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NetSNMP is the only SNMP implementation for Quagga. We don't need two
different symbols.
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Some .h files in lib/ are autogenerated. The search path should
include the build directory and the source directory. They usually
match but sometimes, they may be different. For example:
$ mkdir build
$ cd build
$ ../configure
$ make
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The change from bgp_node_get() to bgp_node_lookup() broke aggregation.
Signed-off-by: Jorge Boncompte [DTI2] <jorge@dti2.net>
Tested-by: Martin Winter <mwinter@opensourcerouting.org>
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
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The timers are rearmed after events processing. After 6a4677b7 we
do not generate events that can rearm the holdtime timer.
Fix it's to call bgp_timer_set() directly as it's done from bgp_event().
Signed-off-by: Jorge Boncompte [DTI2] <jorge@dti2.net>
Tested-by: Martin Winter <mwinter@opensourcerouting.org>
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
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* bgpd.h: add a BGP_OPT_NO_LISTEN option for the master BGP configuration,
to prevent any listen socket being created automatically. Allows code
to be used outside of BGP daemon settings.
* bgpd.c: (bgp_get) honour above the flag, suppress auto-creation of listen
socket on first BGP instance if set.
(bgp_option_set) whitelist BGP_OPT_NO_LISTEN
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This reverts commit 7621f336e2f346edee43227f0b1ef93fe769720b. See bug #727
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Reduce indirection for values that doesn't change in the loop.
Signed-off-by: Jorge Boncompte [DTI2] <jorge@dti2.net>
[adjusted after dropping previous patch]
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
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If there were no aggregates configured this functions were allocating
and freeing a struct bgp_node for every call, and it's called for every
prefix received.
* bgp_route.c: Bail out early if the there are no aggregates configured.
Change from bgp_node_get() to bgp_node_lookup() that does not allocate
a new struct bgp_node if not found.
Signed-off-by: Jorge Boncompte [DTI2] <jorge@dti2.net>
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
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Avoids 3 checks per call.
Signed-off-by: Jorge Boncompte [DTI2] <jorge@dti2.net>
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
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* bgp_packet.c: (bgp_update_receive) for every update received we queue
an event just to cancel the holdtime timer, done in bgp_fsm_update().
Instead cancel the timer directly an avoid a scheduling pass.
This incidently fixes another problem found on a slow box, where thousands
of events threads were queued, and run, but never freed, because they are
moved to the unused list that grows without bounds.
Signed-off-by: Jorge Boncompte [DTI2] <jorge@dti2.net>
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
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It's initialized below
Signed-off-by: Jorge Boncompte [DTI2] <jorge@dti2.net>
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
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Try to use on stack structs for temporary uses.
Signed-off-by: Jorge Boncompte [DTI2] <jorge@dti2.net>
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
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Reduce memory heap fragmentation and pressure on the memory allocator.
Signed-off-by: Jorge Boncompte [DTI2] <jorge@dti2.net>
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
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The call to bgp_attr_default_set() above creates the attr_extra struct,
but the attr.extra = NULL initialization was leaking it.
Signed-off-by: Jorge Boncompte [DTI2] <jorge@dti2.net>
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
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Reduce memory heap fragmentation and pressure on the memory allocator.
Signed-off-by: Jorge Boncompte [DTI2] <jorge@dti2.net>
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
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Signed-off-by: Jorge Boncompte [DTI2] <jorge@dti2.net>
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
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