This patch adds save and restore commands to "ip route". Save dumps
the RTNL stream to stdout which can then be passed to restore later.
This may be helpful in some normal situations, and will allow C/R to
migrate the routing information in userspace.  Tweaking of the stream
can be done by userspace helpers to convert between versions and adjust
things like device indexes when restoring routes in a different
environment.

By factoring out some of the common bits of print_route() into
filter_nlmsg(), the "save" command can use the same selection logic
as "list," allowing the caller to save only specific routes as
necessary.

The only change since the RFC is the addition of manpage and doc
material.
Signed-off-by: Dan Smith <danms@us.ibm.com>

Add the iproute2 support for the ACT_CSUM action. Can be used as
following, certainly in conjunction with the ACT_PEDIT action (pedit):

 # In order to DNAT (stateless) IPv4 packet from 192.168.1.100 to
 #  0x12345678 (18.52.86.120), and update the IPv4 header checksum and
 #  the UDP checksum (the last one, only if the packet is UDP).
tc filter add eth0 prio 1 protocol ip parent ffff: \
  u32 match ip src 192.168.1.100/32 flowid :1 \
    action pedit munge offset 16 u32 set 0x12345678 \
      pipe csum ip and udp

 # In order to alter destination address of IPv6 TCP packets from fc00::1
 #  and correct the TCP checksum (nothing happened? except maybe for
 #  checksums in the TCP payload ...).
tc filter add eth0 prio 1 protocol ipv6 parent ffff: \
  u32 match ip6 src fc00::1/128 match ip6 protocol 0x06 0xff flowid :1 \
    action pedit munge offset 24 u32 set 0x12345678 \
      pipe csum tcp

The default remains at 10 for backwards compatibility.

For instance:
 # ip addr flush dev eth2
 *** Flush remains incomplete after 10 rounds. ***
 # ip -l 20 addr flush dev eth2
 *** Flush remains incomplete after 20 rounds. ***
 # ip -loops 0 addr flush dev eth2
 #

This is useful for getting rid of large numbers of IP
addresses in scripts.
Signed-off-by: Ben Greear <greearb@candelatech.com>

Add support for 'mode' parameter when creating a macvtap device.
This allows a macvtap device to be created in bridge, private or
the default vepa modes.
Signed-off-by: Sridhar Samudrala <sri@us.ibm.com>

-------------------------------------------------------------------
Acked-by: Arnd Bergmann <arnd@arndb.de>

Print directly to the file instead of going through a buffer.
Signed-off-by: Andreas Schwab <schwab@linux-m68k.org>

We can use rxhash to classify the traffic into flows. As rxhash maybe
supplied by NIC or RPS, it is cheaper.
Signed-off-by: Changli Gao <xiaosuo@gmail.com>
Acked-by: Jamal Hadi Salim <hadi@cyberus.ca>

Similar to tunnel side: accept dotted-quad and number formats.
Use regular number for printing the key.
Signed-off-by: Timo Teräs <timo.teras@iki.fi>

Print GRE key as a regular number. It is not really an IPv4 address
and this is also how Cisco and Juniper treats GRE keys. Do keep the
parsing of dotted-quad format for backwards compatibility.
Signed-off-by: Timo Teräs <timo.teras@iki.fi>

iptables dropped the xtables_set_revision() function around version 1.4.9,
so set the rev directly ourselves.  This should be compatible back to the
original version m_xt itself is designed for.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>

Use the available libraries for mapping from interface index to name
or type. This should speed up display with lots of interfaces

The subdirectory makefiles need Config file to exist.
Therefore create it, then run make clean, then remove it.

Use santized headers from 2.6.36 release

display socket policy direction
Signed-off-by: Ulrich Weber <uweber@astaro.com>

Bug reported where priorities of GRED DP's are ignored.
The option parsing sets opt then memset was clearing these
values.

Le lundi 23 août 2010 à 10:33 -0700, Stephen Hemminger a écrit :

> I think this breaks the wraparound detection code in this command.
>
>

OK lets fix the bug only, before adding 64bit counters capabilities.

Thanks

[PATCH] iproute2: add 64bit arches support to ifstat

ifstat assumes IFLA_STATS fields are "unsigned long", but they are
__u32. This fix is needed to let ifstat run on 64bit arches.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>

In recent kernels, net_device_stats is not exposed and the code
shoulf have used rt_link_statistics.  Also, fix use of sprintf
with user supplied value.

Adds support for RTA_MARK rt attribute added in linux-2.6.36

$ ip route get ADDR mark 4
192.168.20.110 dev eth1  src 192.168.20.108  mark 4
    cache  mtu 1500 advmss 1460 hoplimit 64

$ ip route get 192.168.20.108 from ADDR iif STRING mark 256
local 192.168.20.108 from 192.168.20.110 dev lo  src 192.168.20.108  mark 0x100
    cache <local,src-direct>  iif eth1

$ ip route list cache [ADDR] mark NUMBER

Hexadecimal output if mark >= 16
null marks are not displayed.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>

iproute_get will return cloned routes for IPv4
and cloned as well non-cloned routes for IPv6.

Therefore RTM_F_CLONED flag should not be checked
for iproute_get routes. Check in print_route will
always fail because valid values are 0 and 1.
Signed-off-by: Ulrich Weber <uweber@astaro.com>

The old 'ip addr flush' logic had several flaws:

* It reversed logic for primary v/s secondary flags
  (though, it sort of worked right anyway)

* The code tried to remove secondaries and then primaries,
  but in practice, it always removed one primary per loop,
  which not at all efficient.

* The filter logic in the core would run only the first
  filter in most cases.

* If you used '-s -s', the ifa_flags member would be
  modified, which could make future filters fail
  to function fine.

This patch attempts to fix all of these issues.
Tested-by: Brian Haley <brian.haley@hp.com>
Signed-off-by: Ben Greear <greearb@candelatech.com>

The u32 key match was incorrect byte order when using ether source
or destination address matching.

Fixes problems with xtables based MARK target ("ipt" module).
When tc loads the "ipt" (xt) module it kept the symbols local,
this made loading of libxtables not find the required struct.

currently ipt/xt is the only tc action module.
iproute2 never seem to do dlclose.
hopefully the modules doesn't export more symbols then needed.

In this situation hopefully the RTLD_GLOBAL flag won't hurt us.

I've been using this patch in the Debian package of iproute for
the last 3 weeks and noone has complained.
( This fixes http://bugs.debian.org/584898 )
Signed-off-by: Andreas Henriksson <andreas@fatal.se>

> On closer inspection, it appears that ss -p does a quadratic scan. It
> rescans every entry in /proc/*/fd/* repeatedly (once per listening
> port? per process? I don't remember what I figured out.)
>
> I humbly suggest that this is not a good idea.

Yep, this is junk.  Please give this patch a try:

ss: Avoid quadradic complexity with '-p'

Scan the process list of open sockets once, and store in a hash
table to be used by subsequent find_user() calls.
Reported-by: Steve Fink <sphink@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The tc program searches LIBDIR by default for the .dist files, and that
defaults to /usr/lib.  But the netem subdir has /lib/ hardcoded which
means the default build+install results in the files not being found.

Further, these are plain text files which are read at runtime, so it
doesn't make sense to give them executable bits.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>

If basic match has no tree of matches underneath
then print_ematch would core dump.

Add all current values. Since if_arp.h is included, get rid
of ifdefs'. Make table constant.

Recent gcc doesn't like it when you cast char pointers to uint16_t
pointers and then dereference it.  So use memcpy() instead and let
gcc take care of optimizing things away (when appropriate).  This
should also fix alignment issues on arches where gcc packs the char
pointer tighter than 16bits.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>

This patch adds ipv6 filter priority/traffic class function
static int parse_ip6_class(int *argc_p, char ***argv_p, struct tc_u32_sel *sel)
shifting filter value to 5th bit and ignoring "at" as header position
is exactly given.
Signed-off-by: Petr Lautrbach <plautrba@redhat.com>

The recent commit "iproute2: add option to build m_xt as a tc module"
(ab814d63) looks like it wrongly included debug changes in the
install target.  So drop the `echo` so the tc binary actually gets
installed again.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>

Get ip rule parsing of "dsfield" in sync with ip route parsing and manual page.
Signed-off-by: Arnd Hannemann <hannemann@nets.rwth-aachen.de>

The do_multirule logic was broken in batch mode because
it expected the preferred_family to be AF_INET or AF_INET6,
but it then assigned it to RTNL_FAMILY_IPMR or RTNL_FAMILY_IP6MR.
So, the next iteration of the batch processing, it failed
the check for AF_INET or AF_INET6.
Signed-off-by: Ben Greear <greearb@candelatech.com>

otherwise "if ((int)val == -1)" will never match on 64 bit systems
Signed-off-by: Ulrich Weber <uweber@astaro.com>

as already done in IPv4 and metrics code part
Signed-off-by: Ulrich Weber <uweber@astaro.com>

Before IPv6 routing cache entries were always displayed
if additional tables beside MAIN and LOCAL are installed.
Signed-off-by: Ulrich Weber <uweber@astaro.com>

commit 44a5293c1c47b8c32d9bb0756660ea5d4802acf2
Author: Patrick McHardy <kaber@trash.net>
Date:   Tue Apr 13 17:03:47 2010 +0200

    ip: add support for multicast rules
Signed-off-by: Patrick McHardy <kaber@trash.net>

`ip -s link` shows interface counters truncated to 32 bit. This is
because interface statistics are transported only in 32-bit quantity
to userspace. This commit adds recognition for the new IFLA_STATS64
attribute that exports them in full 64 bit.
Signed-off-by: Jan Engelhardt <jengelh@medozas.de>

Version for 2.6.35 version on -next