If get_rt_realms() fails, try to get a possible raw u32 realms
value for the u32 RTA_FLOW/FRA_FLOW attribute, as it might be
useful to directly configure the hex value itself. And only if
that fails, then bail out.

The source realm is provided in the upper u16 (mask: 0xffff0000)
and the destination realm through the lower u16 part (mask:
0x0000ffff). This can be useful for tc's bpf realm matcher, but
also a full hex/mask param can be provided already for matching
through iptables' --realm cmdline option, for example.
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

Track upstream

This patch adds save and restore commands to "ip rule"
similar the same is made in commit f4ff11e3 for "ip route".

The feature is useful in checkpoint/restore for container
migration, also it may be helpful in some normal situations.
Signed-off-by: Kirill Tkhai <ktkhai@odin.com>

replace exit with return -2 on rtnl_talk failure
Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>

This patch adds fflush in fdb and mdb print functions
Signed-off-by: Wilson Kok <wkok@cumulusnetworks.com>
Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>

This has been inconsistent since the beginning of Git and seems to be
merely a documentation leftover, therefore just remove it from help
output and man page.
Signed-off-by: Phil Sutter <phil@nwl.cc>

When getopt_long encounters an option which has not been registered, it
returns '?'. React upon that and call usage() instead of help() so ss
returns with a non-zero exit status.
Signed-off-by: Phil Sutter <phil@nwl.cc>

This patch updates ip-route man page with lwtunnel encap
usage and description, covering MPLS and IP encapsulation.
Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: Thomas Graf <tgraf@suug.ch>
Acked-by: Jiri Benc <jbenc@redhat.com>

This patch adds support to parse and print lwtunnel
encapsulation attributes attached to routes for MPLS
and IP tunnels.

example:
Add ipv4 route with mpls encap attributes:

Examples:

  MPLS:
  $ ip route add 40.1.2.0/30 encap mpls 200 via inet 40.1.1.1 dev eth3
  $ ip route show
  40.1.2.0/30  encap mpls 200 via 40.1.1.1 dev eth3

  Add ipv4 multipath route with mpls encap attributes:
  $ ip route add 10.1.1.0/30 nexthop encap mpls 200 via 10.1.1.1 dev eth0 \
		    nexthop encap mpls 700 via  40.1.1.2 dev eth3
  $ ip route show
  10.1.1.0/30
    nexthop encap mpls 200  via 10.1.1.1  dev eth0 weight 1
    nexthop encap mpls 700  via 40.1.1.2  dev eth3 weight 1

  IP:
  $ ip route add 10.1.1.1/24 encap ip id 200 dst 20.1.1.1 dev vxlan0
Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: Thomas Graf <tgraf@suug.ch>
Acked-by: Jiri Benc <jbenc@redhat.com>

Files needed for new lwtunnel code.

Signed-off-by: Phil Sutter <phil@nwl.cc>

It helps to grep for one string "Deleted" when monitoring all events.

Fixes: 6ea3ebaf ("iproute2: inform user when a neighbor is removed")
Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Acked-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>

This patch introduces two new api's rta_nest and rta_nest_end to
nest attributes inside a rta attribute represented by 'struct rtattr'
as required to construct a nexthop. Also adds rta_addattr* variants
for u8, u16 and u64 as needed to support encapsulation.
Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: Thomas Graf <tgraf@suug.ch>
Acked-by: Jiri Benc <jbenc@redhat.com>

I've updated Jose's patch to make it slightly simpler (eg: calloc instead
of malloc+memset), and ported it to 4.2.0 which requires it as well, and
attached it to this e-mail.

I can confirm that with this patch 4.1.1 doesn't segfault on me anymore.
The commit message should be reworked I guess though everything's in it
and I didn't want to modify his description.

Can it be merged as-is or should I reword the commit message and reference
Jose as the fix reporter ? We should not let this bug live forever.

From: "j.ps@openmailbox.org" <j.ps@openmailbox.org>

Essentially all that is needed to get rid of this issue is the
addition of:

    memset(u, 0, sizeof(*u));

after:

    if (!(u = malloc(sizeof(*u))))
            break;

Also patched some other situations (strcpy and sprintf uses) that
potentially produce the same results.
Signed-off-by: Jose P Santos <j.ps@openmailbox.org>

[ wt: made Jose's patch slightly simpler, all credits to him for the diag ]
Signed-off-by: Willy Tarreau <w@1wt.eu>

Signed-off-by: Phil Sutter <phil@nwl.cc>

This flag is allowed for devices in passthru mode to prevent forcing the
underlying interface into promiscuous mode.
Signed-off-by: Phil Sutter <phil@nwl.cc>

After eliminating the minor differences in both files which existed
solely because features/fixes were applied to only one of them and not
the other, the remaining differences were in function naming and error
messages. The latter is addressed by using the 'id' field of struct
link_util.

Fold both files into one in order to share common code and eliminate the
chance of having fixes/enhancements applied to only one of them.
Signed-off-by: Phil Sutter <phil@nwl.cc>

After the patch, the most minimal command to load an eBPF action
for late binding with auto index selection through tc is:

  tc actions add action bpf obj prog.o

We already set TC_ACT_PIPE in tc as default opcode, so if nothing
further has been specified, just use it. Also, allow "ok" next to
"pass" for matching cmdline on TC_ACT_OK.
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

Add ifindex to dump request when filtering by device. If the kernel
supports it adding the index to the request limits the amount of data
the kernel pushes to userpsace.

The feature exists in userspace already, so no need to warn the user
if kernel side support does not exist. Using the kernel side filter
makes the request more efficient.
Signed-off-by: David Ahern <dsa@cumulusnetworks.com>

When having optional classid, most minimal command can be sth
like:

  tc filter add dev foo parent X: bpf obj prog.o

Therefore, adapt the code so that a next argument will not be
enforced as the case currently.

Also, minor cleanup on the classid, where we should rather
have used addattr32(), and add flags for exec configuration,
for example (using short notation):

  tc filter add dev foo parent X: bpf da obj prog.o
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@plumgrid.com>

Add support for filtering neighbor dumps by master device. Kernel side
support provided by commit 21fdd092acc7. Since the feature is not
available in older kernels the user is given a warning message if the
kernel does not support the request.
Signed-off-by: David Ahern <dsa@cumulusnetworks.com>

This patch documents bridge and ip -timestamp option
Signed-off-by: Satish Ashok <sashok@cumulusnetworks.com>

This patch adds support to batch bridge commands.
Follows ip batch code.
Signed-off-by: Wilson Kok <wkok@cumulusnetworks.com>
Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Acked-by: Christophe Gouault <christophe.gouault@6wind.com>

Support quoting strings with " or ' in an iproute2 batch file.

Enables to configure empty crypto keys (for ESP-null) or keys with
spaces:

    xfrm state add src 1.1.1.1 dst 2.2.2.2 proto ah spi 0x1 \
        mode tunnel auth hmac(sha1) "r4ezR/@kd6'749f2 6zf$"

    xfrm state add src 5.5.5.5 dst 2.2.2.2 proto esp spi 0x2 \
        mode tunnel enc cipher_null ""
Signed-off-by: Christophe Gouault <christophe.gouault@6wind.com>

Device names that match "help" or a prefix thereof should be allowed anywhere
a device name can be used. Note that a suitable keyword ("dev" or "name", the
latter for "ip tunnel") has to be used in these cases to resolve ambiguities.
Signed-off-by: Christoph Schulz <develop@kristov.de>
Reported-by: Leonhard Preis <leonhard@pre.is>
Reported-by: Wilhelm Wijkander <lists@0x5e.se>

This patch adds man pages for the TIPC tool. There is one main page
and one page for each top level sub-command. These pages mainly aims
to help a user of the tipc tool. In addition to this they describe
a bit about what TIPC is and some of its features as a protocol.
Signed-off-by: Richard Alpe <richard.alpe@ericsson.com>
Reviewed-by: Erik Hugne <erik.hugne@ericsson.com>
Reviewed-by: Jon Maloy <jon.maloy@ericsson.com>

linux-3.19 fq packet scheduler got a new attribute, controlling
number of 'flows' holding packets not attached to a socket
(forwarding usage)

kernel commit is 06eb395fa9856b5a87cf7d80baee2a0ed3cdb9d7
("pkt_sched: fq: better control of DDOS traffic")

This patch adds corresponding code to tc command.

tc qd replace dev eth0 root fq orphan_mask 511
Signed-off-by: Eric Dumazet <edumazet@google.com>

Commit 1527a17e introduced a change where the second of two ssfilter_parse()
calls in ss.c was moved outside of a conditional block (ss.c: ~3575). This
commit enabled the parsing of services, such as 'sport = :ssh', but
inadvertently broke the '-F' file-based filtering:

Partially based on kernel Kconfig help text, code comments and
git commit messages from Eric Dumazet.

Joint work with Phil Sutter.
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Florian Westphal <fw@strlen.de>

Support -timestamp and -tshort options for tc monitor like ip monitor.

# tc -tshort monitor
[2015-09-23T16:39:11.260555] qdisc fq 8003: dev eth0 root refcnt 2 limit
10000p flow_limit 100p buckets 1024 quantum 3028 initial_quantum 15140
refill_delay 40.0ms
Signed-off-by: Eric Dumazet <edumazet@google.com>