- Add a new node `SRV6_ENCAP_NODE` to the CLI graph. This node allows
users to configure encapsulation parameters for SRv6, including the
source address of the outer encapsulating IPv6 header.
- Install a new CLI command `source-address` under the
`SRV6_ENCAP_NODE` node. This command is used to configure the source
address of the outer encapsulating IPv6 header.
- Install a new CLI command `no source-address` under the
`SRV6_ENCAP_NODE` node. This command is used to unset the
source address of the outer encapsulating IPv6 header and restore the
default source address.
zebra: Add code to set SRv6 encap source addr in dplane
Add a bunch of set functions and associated data structure in
zebra_dplane to allow the configuration of the source address for SRv6
encap in the data plane.
zebra: Add function to resolve Generic Netlink family
Generic Netlink is an extension of Netlink meant for kernel-user space
communications. It supports the dynamic allocation of communication
channels. Kernel and user space applications register their services
with a Generic Netlink controller. The Generic Netlink controller is
responsible for assigning a unique channel number with each service.
Clients who want to use a service query the controller to see if
the service exists and to determine the correct channel number. The
channel number is used to access the requested service.
This commit adds the base functionality to get the channel number
assigned to a specific service. More precisely, this commit adds a
function `genl_resolve_family()` that takes the service name (called
family in the Generic Netlink terminology) as an input parameter and
queries the Generic Netlink controller to get the channel number
assigned with the requested service.
zebra already supports several Netlink sockets which allow it to
communicate with the kernel. Each Netlink socket has a specific purpose:
we have a socket for incoming events from the kernel, a socket for
programming the dataplane, a socket for the kernel messages, a socket
used as the command channel. All the currently supported sockets are
based on the `NETLINK_ROUTE` protocol.
This commit adds a new Netlink socket that allows zebra to send
commands to the kernel using the `Generic Netlink` protocol.
The `netlink_socket()` function is used in many places to create and
initialize Netlink sockets. Currently, it can only create
`NETLINK_ROUTE` Netlink sockets.
This commit generalizes the behavior of the `netlink_socket()` function,
enabling it to generate Netlink sockets of any type. Specifically, it
extends the `netlink_socket()` function with a new argument `nl_family`,
which allows developers to specify the Netlink family of the socket to
be created.
Louis Scalbert [Wed, 14 Jun 2023 13:19:15 +0000 (15:19 +0200)]
topotests: log exabgp by default
Log exabgp by default in /tmp/topotests/<testname>/<peername>/exabgp.log
Level is INFO.
Note that in case the configuration syntax is invalid, exabgp does not
log into the file and exits at startup. You can check a configuration
syntax by running:
> exabgp <exabgp.cfg>
Signed-off-by: Louis Scalbert <louis.scalbert@6wind.com>
Donald Sharp [Tue, 12 Dec 2023 22:48:16 +0000 (17:48 -0500)]
bgpd: Have `show bgp vrf all ipv4 uni summ` display vrf NAME
The vrf name was not being displayed in this output.
New output:
eva# show bgp vrf all ipv4 uni summ
BGP router identifier 0.0.0.0, local AS number 99 VRF RED vrf-id 14
BGP table version 0
RIB entries 0, using 0 bytes of memory
Peers 1, using 20 KiB of memory
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd PfxSnt Desc
192.168.119.1 4 0 0 0 0 0 0 never Active 0 N/A
Total number of neighbors 1
BGP router identifier 0.0.0.0, local AS number 99 VRF GREEN vrf-id 15
BGP table version 0
RIB entries 0, using 0 bytes of memory
Peers 1, using 20 KiB of memory
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd PfxSnt Desc
192.168.119.1 4 0 0 0 0 0 0 never Active 0 N/A
Total number of neighbors 1
BGP router identifier 192.168.122.1, local AS number 99 VRF default vrf-id 0
BGP table version 0
RIB entries 0, using 0 bytes of memory
Peers 1, using 20 KiB of memory
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd PfxSnt Desc
192.168.119.1 4 0 0 0 0 0 0 never Active 0 N/A
Total number of neighbors 1
BGP router identifier 0.0.0.0, local AS number 99 VRF GrEEn vrf-id -1
BGP table version 0
RIB entries 0, using 0 bytes of memory
Peers 1, using 20 KiB of memory
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd PfxSnt Desc
192.168.119.1 4 0 0 0 0 0 0 never Idle 0 N/A
Donald Sharp [Mon, 11 Dec 2023 15:46:53 +0000 (10:46 -0500)]
bgpd: Make `suppress-fib-pending` clear peering
When a peer has come up and already started installing
routes into the rib and `suppress-fib-pending` is either
turned on or off. BGP is left with some routes that
may need to be withdrawn from peers and routes that
it does not know the status of. Clear the BGP peers
for the interesting parties and let's let us come
up to speed as needed.
Donald Sharp [Tue, 12 Dec 2023 18:29:47 +0000 (13:29 -0500)]
zebra: Don't leak memory in rtadv.c code on shutdown
The adata variable was being leaked on shutdown since
it was calloc'ed. There is no need to make this dynamic
memory. Just choose a size and use that. Add a bit
of code to ensure that if it's not large enough,
it will just stop and the developer will fix it.
Donald Sharp [Mon, 11 Dec 2023 20:22:07 +0000 (15:22 -0500)]
zebra: Properly unregister hook on shutdown
the zebra pseudo wire code was registering a callback
per vrf. These callbacks are not per vrf based. They
are vrf agnostic so this was a mistake. Modify the code
to on startup register once and on shutdown unregister once.
Finally rename the zebra_pw_init and zebra_pw_exit functions
to more properly reflect when they are called.
Philippe Guibert [Mon, 11 Dec 2023 16:23:50 +0000 (17:23 +0100)]
bgpd: move l3nhg functions in separate bgp_nhg.[ch] file
This rework separates l3nhg functionality from the nexthop
tracking code, by introducing two bgp_nhg.[ch] files. The
calling functions are renamed from bgp_l3nhg* to bgp_nhg*.
Signed-off-by: Philippe Guibert <philippe.guibert@6wind.com>
Olivier Dugeon [Thu, 7 Dec 2023 13:53:16 +0000 (14:53 +0100)]
ospfd: Correct SID check size
Segment Router Identifier (SID) could be an index (4 bytes) within a range
(SRGB or SRLB) or an MPLS label (3 bytes). Thus, before calling check_size
macro to verify SID TLVs size, it is mandatory to determine the SID type to
avoid wrong assert.
The NHG_DEL operation is done directly from ZAPI call, whereas
the NHG_ADD operation is done in the rib_nhg meta queue.
This may be problematic when ADD is followed by DEL. Imagine a
scenarion with two protocol NHIDs. <NH1> depends of <NH2> and
<NH3>. The deletion of <NH3> at the protocol level will trigger
2 messages to ZEBRA: NHG_ADD(<NH1>) and NHG_DEL(<NH3>).
Those operations are properly enqueued in ZAPI, but in the end,
the NHG_DEL is executed first. This causes NHG_ADD to unlink an
already freed NHG.
Fix this by consistently enqueuing NHG_DEL and NHG_ADD operations.
Signed-off-by: Philippe Guibert <philippe.guibert@6wind.com>
Donald Sharp [Mon, 6 Nov 2023 18:02:01 +0000 (13:02 -0500)]
bgpd: Ensure BGP does not stop monitoring nexthops
In some cases BGP can be monitoring the same prefix
in both the nexthop and import check tables. If this
is the case, when unregistering one bnc from one table
make sure we are not still registered in the other
Example of the problem:
r1(config-router)# address-family ipv4 uni
r1(config-router-af)# no network 192.168.100.41/32
r1(config-router-af)# exit
r1# show bgp import-check-table
Current BGP import check cache:
r1# show bgp nexthop
Current BGP nexthop cache:
192.168.100.41 valid [IGP metric 0], #paths 1, peer 192.168.100.41
if r1-eth0
Last update: Wed Dec 6 11:01:40 2023
BGP now believes it is only watching 192.168.100.41 in the nexthop
cache, but zebra doesn't have anything:
r1# show ip import-check
VRF default:
Resolve via default: on
r1# show ip nht
VRF default:
Resolve via default: on
So if anything happens to the route that is being matched for
192.168.100.41 bgp is no longer going to be notified about this.
The source of this problem is that zebra has dropped the two different
tables into 1 table, while bgp has 2 tables to track this. The solution
to this problem (other than the rewrite that is being done ) is to have
BGP have a bit of smarts about looking in both tables for the bnc and
if found in both don't send the delete of the prefix tracking to zebra.
Donald Sharp [Wed, 6 Dec 2023 13:33:31 +0000 (08:33 -0500)]
zebra: Add connected with noprefixroute
Add ability for the connected routes to know
if they are a prefix route or not.
sharpd@eva:/work/home/sharpd/frr1$ ip addr show dev dummy1
13: dummy1: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default qlen 1000
link/ether aa:93:ce:ce:3f:62 brd ff:ff:ff:ff:ff:ff
inet 192.168.55.1/24 scope global noprefixroute dummy1
valid_lft forever preferred_lft forever
inet 192.168.56.1/24 scope global dummy1
valid_lft forever preferred_lft forever
inet6 fe80::a893:ceff:fece:3f62/64 scope link
valid_lft forever preferred_lft forever
sharpd@eva:/work/home/sharpd/frr1$ sudo vtysh -c "show int dummy1"
Interface dummy1 is up, line protocol is up
Link ups: 0 last: (never)
Link downs: 0 last: (never)
vrf: default
index 13 metric 0 mtu 1500 speed 0 txqlen 1000
flags: <UP,BROADCAST,RUNNING,NOARP>
Type: Ethernet
HWaddr: aa:93:ce:ce:3f:62
inet 192.168.55.1/24 noprefixroute
inet 192.168.56.1/24
inet6 fe80::a893:ceff:fece:3f62/64
Interface Type Other
Interface Slave Type None
protodown: off
sharpd@eva:/work/home/sharpd/frr1$ sudo vtysh -c "show ip route"
Codes: K - kernel route, C - connected, L - local, S - static,
R - RIP, O - OSPF, I - IS-IS, B - BGP, E - EIGRP, N - NHRP,
T - Table, v - VNC, V - VNC-Direct, A - Babel, D - SHARP,
F - PBR, f - OpenFabric, t - Table-Direct,
> - selected route, * - FIB route, q - queued, r - rejected, b - backup
t - trapped, o - offload failure
K>* 0.0.0.0/0 [0/100] via 192.168.119.1, enp13s0, 00:00:08
K>* 169.254.0.0/16 [0/1000] is directly connected, virbr2 linkdown, 00:00:08
L>* 192.168.44.1/32 is directly connected, dummy2, 00:00:08
L>* 192.168.55.1/32 is directly connected, dummy1, 00:00:08
C>* 192.168.56.0/24 is directly connected, dummy1, 00:00:08
L>* 192.168.56.1/32 is directly connected, dummy1, 00:00:08
L>* 192.168.119.205/32 is directly connected, enp13s0, 00:00:08
sharpd@eva:/work/home/sharpd/frr1$ ip route show
default via 192.168.119.1 dev enp13s0 proto dhcp metric 100
169.254.0.0/16 dev virbr2 scope link metric 1000 linkdown
172.17.0.0/16 dev docker0 proto kernel scope link src 172.17.0.1 linkdown
192.168.45.0/24 dev virbr2 proto kernel scope link src 192.168.45.1 linkdown
192.168.56.0/24 dev dummy1 proto kernel scope link src 192.168.56.1
192.168.119.0/24 dev enp13s0 proto kernel scope link src 192.168.119.205 metric 100
192.168.122.0/24 dev virbr0 proto kernel scope link src 192.168.122.1 linkdown
sharpd@eva:/work/home/sharpd/frr1$ ip route show table 255
local 127.0.0.0/8 dev lo proto kernel scope host src 127.0.0.1
local 127.0.0.1 dev lo proto kernel scope host src 127.0.0.1
broadcast 127.255.255.255 dev lo proto kernel scope link src 127.0.0.1
local 172.17.0.1 dev docker0 proto kernel scope host src 172.17.0.1
broadcast 172.17.255.255 dev docker0 proto kernel scope link src 172.17.0.1 linkdown
local 192.168.44.1 dev dummy2 proto kernel scope host src 192.168.44.1
broadcast 192.168.44.255 dev dummy2 proto kernel scope link src 192.168.44.1
local 192.168.45.1 dev virbr2 proto kernel scope host src 192.168.45.1
broadcast 192.168.45.255 dev virbr2 proto kernel scope link src 192.168.45.1 linkdown
local 192.168.55.1 dev dummy1 proto kernel scope host src 192.168.55.1
broadcast 192.168.55.255 dev dummy1 proto kernel scope link src 192.168.55.1
local 192.168.56.1 dev dummy1 proto kernel scope host src 192.168.56.1
broadcast 192.168.56.255 dev dummy1 proto kernel scope link src 192.168.56.1
local 192.168.119.205 dev enp13s0 proto kernel scope host src 192.168.119.205
broadcast 192.168.119.255 dev enp13s0 proto kernel scope link src 192.168.119.205
local 192.168.122.1 dev virbr0 proto kernel scope host src 192.168.122.1
broadcast 192.168.122.255 dev virbr0 proto kernel scope link src 192.168.122.1 linkdown
Fixes: #14952 Signed-off-by: Donald Sharp <sharpd@nvidia.com>
Donald Sharp [Wed, 6 Dec 2023 13:24:01 +0000 (08:24 -0500)]
zebra: Add ability to note that a address is NOPREFIXROUTE
The linux kernel can send up a flag that tells us that the
connected address is not a PREFIXROUTE. Add the ability
to note this and pass it up from the data plane.
sharpd: fix deleting nhid when suppressing nexthop from nh group
When no nexthops are in a nexthop group, two successive events are
sent: NHG_DEL and NHG_ADD, but only the NHG_DEL one is necessary.
Fixes this by returning in the nhg_add() function.
Fixes: 82beaf6ae520 ("sharpd: fix deleting nhid when suppressing nexthop from nh group") Signed-off-by: Philippe Guibert <philippe.guibert@6wind.com>
Chirag Shah [Tue, 5 Dec 2023 03:23:32 +0000 (19:23 -0800)]
bgpd: check bgp evpn instance presence in soo
(pi=pi@entry=0x55e86ec1a5a0, evp=evp@entry=0x7fff4edc2160)
at bgpd/bgp_evpn.c:3623
3623 bgpd/bgp_evpn.c: No such file or directory.
(gdb) info locals
bgp_evpn = 0x0
macvrf_soo = <optimized out>
ret = false
__func__ = <optimized out>
(pi=pi@entry=0x55e86ec1a5a0, evp=evp@entry=0x7fff4edc2160)
at bgpd/bgp_evpn.c:3623
(bgp=bgp@entry=0x55e86e9cd010, afi=afi@entry=AFI_L2VPN,
safi=safi@entry=SAFI_EVPN, p=p@entry=0x0,
pi=pi@entry=0x55e86ec1a5a0, import=import@entry=1,
in_vrf_rt=true,
in_vni_rt=true) at bgpd/bgp_evpn.c:4200
(import=1, pi=pi@entry=0x55e86ec1a5a0, p=p@entry=0x0,
safi=safi@entry=SAFI_EVPN, afi=afi@entry=AFI_L2VPN,
bgp=bgp@entry=0x55e86e9cd010) at bgpd/bgp_evpn.c:6266
afi=afi@entry=AFI_L2VPN, safi=safi@entry=SAFI_EVPN,
p=p@entry=0x7fff4edc2160, pi=pi@entry=0x55e86ec1a5a0)
at bgpd/bgp_evpn.c:6266
(peer=peer@entry=0x55e86ea35400, p=p@entry=0x7fff4edc2160,
addpath_id=addpath_id@entry=0, attr=attr@entry=0x7fff4edc4400,
afi=afi@entry=AFI_L2VPN, safi=<optimized out>,
safi@entry=SAFI_EVPN, type=9, sub_type=0, prd=0x7fff4edc2120,
label=0x7fff4edc211c, num_labels=1,
soft_reconfig=0, evpn=0x7fff4edc2130) at bgpd/bgp_route.c:4805
(peer=peer@entry=0x55e86ea35400, afi=afi@entry=AFI_L2VPN,
safi=safi@entry=SAFI_EVPN, attr=attr@entry=0x7fff4edc4400,
pfx=<optimized out>, psize=psize@entry=34,
addpath_id=0) at bgpd/bgp_evpn.c:4922
(peer=0x55e86ea35400, attr=0x7fff4edc4400, packet=<optimized out>,
withdraw=0) at bgpd/bgp_evpn.c:5997
(peer=peer@entry=0x55e86ea35400, attr=attr@entry=0x7fff4edc4400,
packet=packet@entry=0x7fff4edc43d0,
mp_withdraw=mp_withdraw@entry=0) at bgpd/bgp_packet.c:363
(peer=peer@entry=0x55e86ea35400, size=size@entry=161)
at bgpd/bgp_packet.c:2076
(thread=<optimized out>) at bgpd/bgp_packet.c:2931
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