On unstable networks, routes can be lost and relearned very often. If
we deallocate the input label every time a route is lost and allocate
a new one when the route is relearned, a lot of changes are made in vain.
This patch introduces a logic in which labels are preserved for at least
five minutes before being deallocated by the LIB garbage collector. This
is consistent with what other implementations do.
ldpd: accept notifications during the session establishment process
If we don't do this, we'll never trigger the backoff exponential timer
since it's impossible to distinguish between Initialization NAK's and
general errors.
Also:
* Implement some missing bits from RFC 5036;
* remove superfluous log message in session_shutdown()
(send_notification() logs that we're sending a fatal notification).
ldpd: use synchronous channels for sending log messages
This is necessary to guarantee that all log messages sent from the child
processes are received in the parent process right away.
Without this patch, when a child process calls fatal() or fatalx(),
the log messages don't make it to the parent because the child doesn't
have a chance to flush its buffers before exiting.
When ldpd fails to start for some reason, like failing to create a pid
file, the child processes call their shutdown functions without being
completely initialized. This patch adds some protections to prevent a
segmentation fault on such circumstances.
ldpd: simplify initialization of the child processes
In order to have separate ASLR/cookies per process, ldpd calls exec()
in the child processes after fork() (this is also known as the fork+exec
model).
This is an important security feature but it makes the initialization
of the child processes a bit more complicated as they're not a copy of
the parent anymore, so all parameters given via command line are lost.
To solve this problem, we were creating an argv array by hand with all
necessary parameters and providing it to the exec() syscall. This works
but it's a very ugly solution. This patch introduces a different approach
to solve the problem: send an IMSG_INIT message to the child processes
with all parameters they need in order to initialize properly. This
makes adding additional initialization parameters much more convenient
and less error prone.
bgpd: fixes for the "show bgp large-community" command
* Fix a segfault when the "show bgp large-community" command is given
without any optional large communities;
* Fix parsing of optional large communities. Without this fix a
"Large-community malformed" error is shown even for valid large
communities.
Donald Sharp [Sat, 8 Apr 2017 12:47:59 +0000 (08:47 -0400)]
ospfd: Fix the 'show ip ospf int ...' command
Fixed output:
robot.cumulusnetworks.com# show ip ospf int
enp0s3 is up
ifindex 2, MTU 1500 bytes, BW 0 Mbit <UP,BROADCAST,RUNNING,MULTICAST>
Internet Address 10.0.2.15/24, Broadcast 10.0.2.255, Area 0.0.0.0
MTU mismatch detection:enabled
Router ID 192.168.0.1, Network Type BROADCAST, Cost: 10
Transmit Delay is 1 sec, State Waiting, Priority 1
No backup designated router on this network
Multicast group memberships: OSPFAllRouters
Timer intervals configured, Hello 10s, Dead 40s, Wait 40s, Retransmit 5
Hello due in 9.611s
Neighbor Count is 0, Adjacent neighbor count is 0
enp0s10 is up
ifindex 7, MTU 1500 bytes, BW 0 Mbit <UP,BROADCAST,RUNNING,MULTICAST>
Internet Address 192.168.201.146/24, Broadcast 192.168.201.255, Area 0.0.0.0
MTU mismatch detection:enabled
Router ID 192.168.0.1, Network Type BROADCAST, Cost: 10
Transmit Delay is 1 sec, State Waiting, Priority 1
No backup designated router on this network
Multicast group memberships: OSPFAllRouters
Timer intervals configured, Hello 10s, Dead 40s, Wait 40s, Retransmit 5
Hello due in 7.241s
Neighbor Count is 0, Adjacent neighbor count is 0
robot.cumulusnetworks.com# show ip ospf int enp0s3
enp0s3 is up
ifindex 2, MTU 1500 bytes, BW 0 Mbit <UP,BROADCAST,RUNNING,MULTICAST>
Internet Address 10.0.2.15/24, Broadcast 10.0.2.255, Area 0.0.0.0
MTU mismatch detection:enabled
Router ID 192.168.0.1, Network Type BROADCAST, Cost: 10
Transmit Delay is 1 sec, State Waiting, Priority 1
No backup designated router on this network
Multicast group memberships: OSPFAllRouters
Timer intervals configured, Hello 10s, Dead 40s, Wait 40s, Retransmit 5
Hello due in 2.915s
Neighbor Count is 0, Adjacent neighbor count is 0
Chirag Shah [Wed, 5 Apr 2017 20:14:12 +0000 (13:14 -0700)]
pimd: Pim Nexthop Tracking support with ECMP
In this patch, PIM nexthop tracking uses locally populated nexthop cached list
to determine ECMP based nexthop (w/ ECMP knob enabled), otherwise picks
the first nexthop as RPF.
Introduced '[no] ip pim ecmp' command to enable/disable PIM ECMP knob.
By default, PIM ECMP is disabled.
Intorudced '[no] ip pim ecmp rebalance' command to provide existing mcache
entry to switch new path based on hash chosen path.
Introduced, show command to display pim registered addresses and respective nexthops.
Introuduce, show command to find nexthop and out interface for (S,G) or (RP,G).
Re-Register an address with nexthop when Interface UP event received,
to ensure the PIM nexthop cache is updated (being PIM enabled).
During PIM neighbor UP, traverse all RPs and Upstreams nexthop and determine, if
any of nexthop's IPv4 address changes/resolves due to neigbor UP event.
Testing Done: Run various LHR, RP and FHR related cases to resolve RPF using
nexthop cache with ECMP knob disabled, performed interface/PIM neighbor flap events.
Executed pim-smoke with knob disabled.
Signed-off-by: Chirag Shah <chirag@cumulusnetworks.com>
Donald Sharp [Thu, 23 Mar 2017 01:07:57 +0000 (21:07 -0400)]
pimd: Allow SPT switchover
This allows SPT switchover for S,G upon receipt of packets
on the LHR.
1) When we create a *,G from a IGMP Group Report, install
the *,G route with the pimreg device on the OIL.
2) When a packet hits the LHR that matches the *,G, we will
get a WHOLEPKT callback from the kernel and if we cannot
find the S,G, that means we have matched it on the LHR via
the *,G mroute. Create the S,G start the KAT and run
inherited_olist.
3) When the S,G times out, safely remove the S,G via
the KAT expiry
4) When the *,G is removed, remove any S,G associated
with it via the LHR flag.
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
Donald Sharp [Wed, 5 Apr 2017 00:36:16 +0000 (20:36 -0400)]
doc: Cleanup 'Build the Software'
The frrouting.org web page:
https://frrouting.org/manual/Build-the-Software.html#Build-the-Software
is built from doc/install.texi. The output on this page is a bit
missleading, let's clean it up some.
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
Donald Sharp [Tue, 4 Apr 2017 19:20:52 +0000 (15:20 -0400)]
vtysh: Fix build for non-snmp case
The snmp code is being included in the build of the vtysh_cmd.c
irrelevant of whether or not it is needed. Be a bit smarter
about what files to include.
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com> Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
David Lamparter [Tue, 4 Apr 2017 19:25:19 +0000 (21:25 +0200)]
build: fix CFLAGS for snmp modules
The SNMP modules include <net-snmp/net-snmp-config.h>, which won't be
found in off-searchpath directories without SNMP_CFLAGS. Unfortunately
in my tests the files were on the search path even without the flags.
(SNMP_LIBS is not needed because only libfrrsnmp calls into net-snmp
functions.)
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
Quentin Young [Mon, 3 Apr 2017 20:17:12 +0000 (20:17 +0000)]
ospfd, ospf6d: fix distance commands
OSPF distance commands were broken in a variety of ways. Fix 'em.
* `distance ospf` and `distance ospf6` were accepted commands
* Inconsistent doc strings
* Make use of {keyword|tokens}
* Add ability to reset specific distance without specifying a value
Ex: ~# no distance ospf6 intra
Signed-off-by: Quentin Young <qlyoung@cumulusnetworks.com>
projects / matthieu / frr.git / log