21 Oct, 2020
1 commit
-
mpls_iptunnel is used only for mpls encapsuation, and if encaplusated
packet is larger than MTU we need mpls_gso for segmentation.Signed-off-by: Alexander Ovechkin
Acked-by: Dmitry Yakunin
Reviewed-by: David Ahern
Link: https://lore.kernel.org/r/20201020114333.26866-1-ovov@yandex-team.ru
Signed-off-by: Jakub Kicinski
24 Aug, 2020
1 commit
-
Replace the existing /* fall through */ comments and its variants with
the new pseudo-keyword macro fallthrough[1]. Also, remove unnecessary
fall-through markings when it is the case.[1] https://www.kernel.org/doc/html/v5.7/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-through
Signed-off-by: Gustavo A. R. Silva
28 Jul, 2020
1 commit
-
MPLS has no dependency with the device type of underlying devices.
Hence the device type check to add mpls support for devices can be
avoided.Signed-off-by: Martin Varghese
Signed-off-by: David S. Miller
14 Jun, 2020
1 commit
-
Since commit 84af7a6194e4 ("checkpatch: kconfig: prefer 'help' over
'---help---'"), the number of '---help---' has been gradually
decreasing, but there are still more than 2400 instances.This commit finishes the conversion. While I touched the lines,
I also fixed the indentation.There are a variety of indentation styles found.
a) 4 spaces + '---help---'
b) 7 spaces + '---help---'
c) 8 spaces + '---help---'
d) 1 space + 1 tab + '---help---'
e) 1 tab + '---help---' (correct indentation)
f) 1 tab + 1 space + '---help---'
g) 1 tab + 2 spaces + '---help---'In order to convert all of them to 1 tab + 'help', I ran the
following commend:$ find . -name 'Kconfig*' | xargs sed -i 's/^[[:space:]]*---help---/\thelp/'
Signed-off-by: Masahiro Yamada
30 May, 2020
1 commit
-
Move mpls_entry_encode() from net/mpls/internal.h to include/net/mpls.h
and make it available for other users. Specifically, hardware driver that
offload MPLS can benefit from that.Suggested-by: Jakub Kicinski
Suggested-by: David Ahern
Signed-off-by: Eli Cohen
Signed-off-by: Saeed Mahameed
23 May, 2020
1 commit
-
Add support for IPv6 tunnel devices in AF_MPLS.
Signed-off-by: Vadim Fedorenko
Signed-off-by: David S. Miller
27 Apr, 2020
1 commit
-
Instead of having all the sysctl handlers deal with user pointers, which
is rather hairy in terms of the BPF interaction, copy the input to and
from userspace in common code. This also means that the strings are
always NUL-terminated by the common code, making the API a little bit
safer.As most handler just pass through the data to one of the common handlers
a lot of the changes are mechnical.Signed-off-by: Christoph Hellwig
Acked-by: Andrey Ignatov
Signed-off-by: Al Viro
30 Mar, 2020
1 commit
-
The build_state callback of lwtunnel doesn't contain the net namespace
structure yet. This patch will add it so we can check on specific
address configuration at creation time of rpl source routes.Signed-off-by: Alexander Aring
Signed-off-by: David S. Miller
29 Feb, 2020
1 commit
-
The current codebase makes use of the zero-length array language
extension to the C90 standard, but the preferred mechanism to declare
variable-length types such as these ones is a flexible array member[1][2],
introduced in C99:struct foo {
int stuff;
struct boo array[];
};By making use of the mechanism above, we will get a compiler warning
in case the flexible array does not occur last in the structure, which
will help us prevent some kind of undefined behavior bugs from being
inadvertently introduced[3] to the codebase from now on.Also, notice that, dynamic memory allocations won't be affected by
this change:"Flexible array members have incomplete type, and so the sizeof operator
may not be applied. As a quirk of the original implementation of
zero-length arrays, sizeof evaluates to zero."[1]This issue was found with the help of Coccinelle.
[1] https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html
[2] https://github.com/KSPP/linux/issues/21
[3] commit 76497732932f ("cxgb3/l2t: Fix undefined behaviour")Signed-off-by: Gustavo A. R. Silva
Signed-off-by: David S. Miller
05 Dec, 2019
1 commit
-
ipv6_stub uses the ip6_dst_lookup function to allow other modules to
perform IPv6 lookups. However, this function skips the XFRM layer
entirely.All users of ipv6_stub->ip6_dst_lookup use ip_route_output_flow (via the
ip_route_output_key and ip_route_output helpers) for their IPv4 lookups,
which calls xfrm_lookup_route(). This patch fixes this inconsistent
behavior by switching the stub to ip6_dst_lookup_flow, which also calls
xfrm_lookup_route().This requires some changes in all the callers, as these two functions
take different arguments and have different return types.Fixes: 5f81bd2e5d80 ("ipv6: export a stub for IPv6 symbols used by vxlan")
Reported-by: Xiumei Mu
Signed-off-by: Sabrina Dubroca
Signed-off-by: David S. Miller
26 Aug, 2019
1 commit
-
When using mpls over gre/gre6 setup, rt->rt_gw4 address is not set, the
same for rt->rt_gw_family. Therefore, when rt->rt_gw_family is checked
in mpls_xmit(), neigh_xmit() call is skipped. As a result, such setup
doesn't work anymore.This issue was found with LTP mpls03 tests.
Fixes: 1550c171935d ("ipv4: Prepare rtable for IPv6 gateway")
Signed-off-by: Alexey Kodanev
Reviewed-by: David Ahern
Signed-off-by: David S. Miller
19 Jul, 2019
1 commit
-
In the sysctl code the proc_dointvec_minmax() function is often used to
validate the user supplied value between an allowed range. This
function uses the extra1 and extra2 members from struct ctl_table as
minimum and maximum allowed value.On sysctl handler declaration, in every source file there are some
readonly variables containing just an integer which address is assigned
to the extra1 and extra2 members, so the sysctl range is enforced.The special values 0, 1 and INT_MAX are very often used as range
boundary, leading duplication of variables like zero=0, one=1,
int_max=INT_MAX in different source files:$ git grep -E '\.extra[12].*&(zero|one|int_max)' |wc -l
248Add a const int array containing the most commonly used values, some
macros to refer more easily to the correct array member, and use them
instead of creating a local one for every object file.This is the bloat-o-meter output comparing the old and new binary
compiled with the default Fedora config:# scripts/bloat-o-meter -d vmlinux.o.old vmlinux.o
add/remove: 2/2 grow/shrink: 0/2 up/down: 24/-188 (-164)
Data old new delta
sysctl_vals - 12 +12
__kstrtab_sysctl_vals - 12 +12
max 14 10 -4
int_max 16 - -16
one 68 - -68
zero 128 28 -100
Total: Before=20583249, After=20583085, chg -0.00%[mcroce@redhat.com: tipc: remove two unused variables]
Link: http://lkml.kernel.org/r/20190530091952.4108-1-mcroce@redhat.com
[akpm@linux-foundation.org: fix net/ipv6/sysctl_net_ipv6.c]
[arnd@arndb.de: proc/sysctl: make firmware loader table conditional]
Link: http://lkml.kernel.org/r/20190617130014.1713870-1-arnd@arndb.de
[akpm@linux-foundation.org: fix fs/eventpoll.c]
Link: http://lkml.kernel.org/r/20190430180111.10688-1-mcroce@redhat.com
Signed-off-by: Matteo Croce
Signed-off-by: Arnd Bergmann
Acked-by: Kees Cook
Reviewed-by: Aaron Tomlin
Cc: Matthew Wilcox
Cc: Stephen Rothwell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
13 Jun, 2019
1 commit
-
Randy reported that selecting MPLS_ROUTING without PROC_FS breaks
the build, because since commit c1a9d65954c6 ("mpls: fix af_mpls
dependencies"), MPLS_ROUTING selects PROC_SYSCTL, but Kconfig's select
doesn't recursively handle dependencies.
Change the select into a dependency.Fixes: c1a9d65954c6 ("mpls: fix af_mpls dependencies")
Reported-by: Randy Dunlap
Signed-off-by: Matteo Croce
Signed-off-by: David S. Miller
10 Jun, 2019
2 commits
-
MPLS routing code relies on sysctl to work, so let it select PROC_SYSCTL.
Reported-by: Randy Dunlap
Suggested-by: David Ahern
Signed-off-by: Matteo Croce
Signed-off-by: David S. Miller -
If you configure a route with multiple labels, e.g.
ip route add 10.10.3.0/24 encap mpls 16/100 via 10.10.2.2 dev ens4
A warning is logged:
kernel: [ 130.561819] netlink: 'ip': attribute type 1 has an invalid
length.This happens because mpls_iptunnel_policy has set the type of
MPLS_IPTUNNEL_DST to fixed size NLA_U32.
Change it to a minimum size.
nla_get_labels() does the remaining validation.Fixes: e3e4712ec096 ("mpls: ip tunnel support")
Signed-off-by: George Wilkie
Reviewed-by: David Ahern
Signed-off-by: David S. Miller
31 May, 2019
1 commit
-
Based on 1 normalized pattern(s):
this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license as published by
the free software foundation either version 2 of the license or at
your option any later versionextracted by the scancode license scanner the SPDX license identifier
GPL-2.0-or-later
has been chosen to replace the boilerplate/reference in 3029 file(s).
Signed-off-by: Thomas Gleixner
Reviewed-by: Allison Randal
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de
Signed-off-by: Greg Kroah-Hartman
21 May, 2019
2 commits
-
Add SPDX license identifiers to all Make/Kconfig files which:
- Have no license information of any form
These files fall under the project license, GPL v2 only. The resulting SPDX
license identifier is:GPL-2.0-only
Signed-off-by: Thomas Gleixner
Signed-off-by: Greg Kroah-Hartman -
Add SPDX license identifiers to all files which:
- Have no license information of any form
- Have MODULE_LICENCE("GPL*") inside which was used in the initial
scan/conversion to ignore the fileThese files fall under the project license, GPL v2 only. The resulting SPDX
license identifier is:GPL-2.0-only
Signed-off-by: Thomas Gleixner
Signed-off-by: Greg Kroah-Hartman
28 Apr, 2019
2 commits
-
We currently have two levels of strict validation:
1) liberal (default)
- undefined (type >= max) & NLA_UNSPEC attributes accepted
- attribute length >= expected accepted
- garbage at end of message accepted
2) strict (opt-in)
- NLA_UNSPEC attributes accepted
- attribute length >= expected acceptedSplit out parsing strictness into four different options:
* TRAILING - check that there's no trailing data after parsing
attributes (in message or nested)
* MAXTYPE - reject attrs > max known type
* UNSPEC - reject attributes with NLA_UNSPEC policy entries
* STRICT_ATTRS - strictly validate attribute sizeThe default for future things should be *everything*.
The current *_strict() is a combination of TRAILING and MAXTYPE,
and is renamed to _deprecated_strict().
The current regular parsing has none of this, and is renamed to
*_parse_deprecated().Additionally it allows us to selectively set one of the new flags
even on old policies. Notably, the UNSPEC flag could be useful in
this case, since it can be arranged (by filling in the policy) to
not be an incompatible userspace ABI change, but would then going
forward prevent forgetting attribute entries. Similar can apply
to the POLICY flag.We end up with the following renames:
* nla_parse -> nla_parse_deprecated
* nla_parse_strict -> nla_parse_deprecated_strict
* nlmsg_parse -> nlmsg_parse_deprecated
* nlmsg_parse_strict -> nlmsg_parse_deprecated_strict
* nla_parse_nested -> nla_parse_nested_deprecated
* nla_validate_nested -> nla_validate_nested_deprecatedUsing spatch, of course:
@@
expression TB, MAX, HEAD, LEN, POL, EXT;
@@
-nla_parse(TB, MAX, HEAD, LEN, POL, EXT)
+nla_parse_deprecated(TB, MAX, HEAD, LEN, POL, EXT)@@
expression NLH, HDRLEN, TB, MAX, POL, EXT;
@@
-nlmsg_parse(NLH, HDRLEN, TB, MAX, POL, EXT)
+nlmsg_parse_deprecated(NLH, HDRLEN, TB, MAX, POL, EXT)@@
expression NLH, HDRLEN, TB, MAX, POL, EXT;
@@
-nlmsg_parse_strict(NLH, HDRLEN, TB, MAX, POL, EXT)
+nlmsg_parse_deprecated_strict(NLH, HDRLEN, TB, MAX, POL, EXT)@@
expression TB, MAX, NLA, POL, EXT;
@@
-nla_parse_nested(TB, MAX, NLA, POL, EXT)
+nla_parse_nested_deprecated(TB, MAX, NLA, POL, EXT)@@
expression START, MAX, POL, EXT;
@@
-nla_validate_nested(START, MAX, POL, EXT)
+nla_validate_nested_deprecated(START, MAX, POL, EXT)@@
expression NLH, HDRLEN, MAX, POL, EXT;
@@
-nlmsg_validate(NLH, HDRLEN, MAX, POL, EXT)
+nlmsg_validate_deprecated(NLH, HDRLEN, MAX, POL, EXT)For this patch, don't actually add the strict, non-renamed versions
yet so that it breaks compile if I get it wrong.Also, while at it, make nla_validate and nla_parse go down to a
common __nla_validate_parse() function to avoid code duplication.Ultimately, this allows us to have very strict validation for every
new caller of nla_parse()/nlmsg_parse() etc as re-introduced in the
next patch, while existing things will continue to work as is.In effect then, this adds fully strict validation for any new command.
Signed-off-by: Johannes Berg
Signed-off-by: David S. Miller -
Even if the NLA_F_NESTED flag was introduced more than 11 years ago, most
netlink based interfaces (including recently added ones) are still not
setting it in kernel generated messages. Without the flag, message parsers
not aware of attribute semantics (e.g. wireshark dissector or libmnl's
mnl_nlmsg_fprintf()) cannot recognize nested attributes and won't display
the structure of their contents.Unfortunately we cannot just add the flag everywhere as there may be
userspace applications which check nlattr::nla_type directly rather than
through a helper masking out the flags. Therefore the patch renames
nla_nest_start() to nla_nest_start_noflag() and introduces nla_nest_start()
as a wrapper adding NLA_F_NESTED. The calls which add NLA_F_NESTED manually
are rewritten to use nla_nest_start().Except for changes in include/net/netlink.h, the patch was generated using
this semantic patch:@@ expression E1, E2; @@
-nla_nest_start(E1, E2)
+nla_nest_start_noflag(E1, E2)@@ expression E1, E2; @@
-nla_nest_start_noflag(E1, E2 | NLA_F_NESTED)
+nla_nest_start(E1, E2)Signed-off-by: Michal Kubecek
Acked-by: Jiri Pirko
Acked-by: David Ahern
Signed-off-by: David S. Miller
23 Apr, 2019
1 commit
-
The header contains rtnh_ macros so rename the file accordingly.
Allows a later patch to use the nexthop.h name for the new
nexthop code.Signed-off-by: David Ahern
Signed-off-by: David S. Miller
09 Apr, 2019
2 commits
-
Add support for an IPv6 gateway to rtable. Since a gateway is either
IPv4 or IPv6, make it a union with rt_gw4 where rt_gw_family decides
which address is in use.When dumping the route data, encode an ipv6 nexthop using RTA_VIA.
Signed-off-by: David Ahern
Reviewed-by: Ido Schimmel
Signed-off-by: David S. Miller -
To allow the gateway to be either an IPv4 or IPv6 address, remove
rt_uses_gateway from rtable and replace with rt_gw_family. If
rt_gw_family is set it implies rt_uses_gateway. Rename rt_gateway
to rt_gw4 to represent the IPv4 version.Signed-off-by: David Ahern
Reviewed-by: Ido Schimmel
Signed-off-by: David S. Miller
30 Mar, 2019
1 commit
-
The number of stubs is growing and has nothing to do with addrconf.
Move the definition of the stubs to a separate header file and update
users. In the move, drop the vxlan specific comment before ipv6_stub.Code move only; no functional change intended.
Signed-off-by: David Ahern
Signed-off-by: David S. Miller
20 Mar, 2019
1 commit
-
This patch adds support for 6PE (RFC 4798) which uses IPv4-mapped IPv6
nexthop to connect IPv6 islands over IPv4 only MPLS network core.Prior to this fix, to find the link-layer destination mac address, 6PE
enabled host/router was sending IPv6 ND requests for IPv4-mapped IPv6
nexthop address over the interface facing the IPv4 only core which
wouldn't success as the core is IPv6 free.This fix changes that behavior on 6PE host to treat the nexthop as IPv4
address and send ARP requests whenever the next-hop address is an
IPv4-mapped IPv6 address.Below topology illustrates the issue and how the patch addresses it.
abcd::1.1.1.1 (lo) abcd::2.2.2.2 (lo)
R0 (PE/host)------------------------R1--------------------------------R2 (PE/host)
eth1 eth2 eth3 eth4
172.18.0.10 172.18.0.11 172.19.0.11 172.19.0.12
ffff::172.18.0.10 ffff::172.19.0.12
R0 and R2 act as 6PE routers of IPv6 islands. R1 is IPv4 only with MPLS tunnels
between R0,R1 and R1,R2.docker exec r0 ip -f inet6 route add abcd::2.2.2.2/128 nexthop encap mpls 100 via ::ffff:172.18.0.11 dev eth1
docker exec r2 ip -f inet6 route add abcd::1.1.1.1/128 nexthop encap mpls 200 via ::ffff:172.19.0.11 dev eth4docker exec r1 ip -f mpls route add 100 via inet 172.19.0.12 dev eth3
docker exec r1 ip -f mpls route add 200 via inet 172.18.0.10 dev eth2With the change, when R0 sends an IPv6 packet over MPLS tunnel to abcd::2.2.2.2,
using ::ffff:172.18.0.11 as the nexthop, it does neighbor discovery for
172.18.18.0.11.Signed-off-by: Vinay K Nallamothu
Tested-by: Avinash Lingala
Tested-by: Aravind Srinivas Srinivasa Prabhakar
Signed-off-by: David S. Miller
03 Mar, 2019
1 commit
27 Feb, 2019
1 commit
-
MPLS does not support nexthops with an MPLS address family.
Specifically, it does not handle RTA_GATEWAY attribute. Make it
clear by returning an error.Fixes: 03c0566542f4c ("mpls: Netlink commands to add, remove, and dump routes")
Signed-off-by: David Ahern
Signed-off-by: David S. Miller
09 Feb, 2019
1 commit
-
One of the more common cases of allocation size calculations is finding
the size of a structure that has a zero-sized array at the end, along
with memory for some number of elements for that array. For example:struct foo {
int stuff;
struct boo entry[];
};instance = alloc(sizeof(struct foo) + count * sizeof(struct boo));
Instead of leaving these open-coded and prone to type mistakes, we can
now use the new struct_size() helper:instance = alloc(struct_size(instance, entry, count));
This code was detected with the help of Coccinelle.
Signed-off-by: Gustavo A. R. Silva
Signed-off-by: David S. Miller
20 Jan, 2019
2 commits
-
Make RTM_GETNETCONF's doit handler use strict checks when
NETLINK_F_STRICT_CHK is set.Signed-off-by: Jakub Kicinski
Signed-off-by: David S. Miller -
Make RTM_GETROUTE's doit handler use strict checks when
NETLINK_F_STRICT_CHK is set.Signed-off-by: Jakub Kicinski
Signed-off-by: David S. Miller
16 Oct, 2018
4 commits
-
Update the dump request parsing in MPLS for the non-INET case to
enable kernel side filtering. If INET is disabled the only filters
that make sense for MPLS are protocol and nexthop device.Signed-off-by: David Ahern
Signed-off-by: David S. Miller -
Update parsing of route dump request to enable kernel side filtering.
Allow filtering results by protocol (e.g., which routing daemon installed
the route), route type (e.g., unicast), table id and nexthop device. These
amount to the low hanging fruit, yet a huge improvement, for dumping
routes.ip_valid_fib_dump_req is called with RTNL held, so __dev_get_by_index can
be used to look up the device index without taking a reference. From
there filter->dev is only used during dump loops with the lock still held.Set NLM_F_DUMP_FILTERED in the answer_flags so the user knows the results
have been filtered should no entries be returned.Signed-off-by: David Ahern
Signed-off-by: David S. Miller -
Implement kernel side filtering of routes by egress device index and
protocol. MPLS uses only a single table and route type.Signed-off-by: David Ahern
Signed-off-by: David S. Miller -
Add struct fib_dump_filter for options on limiting which routes are
returned in a dump request. The current list is table id, protocol,
route type, rtm_flags and nexthop device index. struct net is needed
to lookup the net_device from the index.Declare the filter for each route dump handler and plumb the new
arguments from dump handlers to ip_valid_fib_dump_req.Signed-off-by: David Ahern
Signed-off-by: David S. Miller
11 Oct, 2018
1 commit
-
Without CONFIG_INET enabled compiles fail with:
net/mpls/af_mpls.o: In function `mpls_dump_routes':
af_mpls.c:(.text+0xed0): undefined reference to `ip_valid_fib_dump_req'The preference is for MPLS to use the same handler as ipv4 and ipv6
to allow consistency when doing a dump for AF_UNSPEC which walks
all address families invoking the route dump handler. If INET is
disabled then fallback to an MPLS version which can be tighter on
the data checks.Fixes: e8ba330ac0c5 ("rtnetlink: Update fib dumps for strict data checking")
Reported-by: Randy Dunlap
Reported-by: Arnd Bergmann
Signed-off-by: David Ahern
Signed-off-by: David S. Miller
09 Oct, 2018
3 commits
-
Update inet_netconf_dump_devconf, inet6_netconf_dump_devconf, and
mpls_netconf_dump_devconf for strict data checking. If the flag is set,
the dump request is expected to have an netconfmsg struct as the header.
The struct only has the family member and no attributes can be appended.Signed-off-by: David Ahern
Acked-by: Christian Brauner
Signed-off-by: David S. Miller -
Add helper to check netlink message for route dumps. If the strict flag
is set the dump request is expected to have an rtmsg struct as the header.
All elements of the struct are expected to be 0 with the exception of
rtm_flags (which is used by both ipv4 and ipv6 dumps) and no attributes
can be appended. rtm_flags can only have RTM_F_CLONED and RTM_F_PREFIX
set.Update inet_dump_fib, inet6_dump_fib, mpls_dump_routes, ipmr_rtm_dumproute,
and ip6mr_rtm_dumproute to call this helper if strict data checking is
enabled.Signed-off-by: David Ahern
Signed-off-by: David S. Miller -
Make sure extack is passed to nlmsg_parse where easy to do so.
Most of these are dump handlers and leveraging the extack in
the netlink_callback.Signed-off-by: David Ahern
Acked-by: Christian Brauner
Signed-off-by: David S. Miller
25 Sep, 2018
1 commit
-
Summary:
This appears to be necessary and sufficient change to enable `MPLS` on
`ip6gre` tunnels (RFC4023).This diff allows IP6GRE devices to be recognized by MPLS kernel module
and hence user can configure interface to accept packets with mpls
headers as well setup mpls routes on them.Test Plan:
Test plan consists of multiple containers connected via GRE-V6 tunnel.
Then carrying out testing steps as below.- Carry out necessary sysctl settings on all containers
```
sysctl -w net.mpls.platform_labels=65536
sysctl -w net.mpls.ip_ttl_propagate=1
sysctl -w net.mpls.conf.lo.input=1
```- Establish IP6GRE tunnels
```
ip -6 tunnel add name if_1_2_1 mode ip6gre \
local 2401:db00:21:6048:feed:0::1 \
remote 2401:db00:21:6048:feed:0::2 key 1
ip link set dev if_1_2_1 up
sysctl -w net.mpls.conf.if_1_2_1.input=1
ip -4 addr add 169.254.0.2/31 dev if_1_2_1 scope linkip -6 tunnel add name if_1_3_1 mode ip6gre \
local 2401:db00:21:6048:feed:0::1 \
remote 2401:db00:21:6048:feed:0::3 key 1
ip link set dev if_1_3_1 up
sysctl -w net.mpls.conf.if_1_3_1.input=1
ip -4 addr add 169.254.0.4/31 dev if_1_3_1 scope link
```- Install MPLS encap rules on node-1 towards node-2
```
ip route add 192.168.0.11/32 nexthop encap mpls 32/64 \
via inet 169.254.0.3 dev if_1_2_1
```- Install MPLS forwarding rules on node-2 and node-3
```
// node2
ip -f mpls route add 32 via inet 169.254.0.7 dev if_2_4_1// node3
ip -f mpls route add 64 via inet 169.254.0.12 dev if_4_3_1
```- Ping 192.168.0.11 (node4) from 192.168.0.1 (node1) (where routing
towards 192.168.0.1 is via IP route directly towards node1 from node4)
```
ping 192.168.0.11
```- tcpdump on interface to capture ping packets wrapped within MPLS
header which inturn wrapped within IP6GRE header```
16:43:41.121073 IP6
2401:db00:21:6048:feed::1 > 2401:db00:21:6048:feed::2:
DSTOPT GREv0, key=0x1, length 100:
MPLS (label 32, exp 0, ttl 255) (label 64, exp 0, [S], ttl 255)
IP 192.168.0.1 > 192.168.0.11:
ICMP echo request, id 1208, seq 45, length 640x0000: 6000 2cdb 006c 3c3f 2401 db00 0021 6048 `.,..l
Signed-off-by: David S. Miller
25 Jul, 2018
1 commit
-
Signed-off-by: Stephen Hemminger
Signed-off-by: David S. Miller
