This adds support for slightly less output than is normally provided by
'ip link show' and 'ip addr show'.  This is a bit better when you have a
host with lots of interfaces.  Sample output:

$ ip -br link show
lo               UNKNOWN        00:00:00:00:00:00 <LOOPBACK,UP,LOWER_UP>
p2p1             UP             08:00:27:ee:0b:3b <BROADCAST,MULTICAST,UP,LOWER_UP>
p7p1             UP             08:00:27:9d:62:9f <BROADCAST,MULTICAST,UP,LOWER_UP>
p8p1             DOWN           08:00:27:dc:d8:ca <NO-CARRIER,BROADCAST,MULTICAST,UP>
p9p1             UP             08:00:27:76:d9:75 <BROADCAST,MULTICAST,UP,LOWER_UP>
p7p1.100@p7p1    UP             08:00:27:9d:62:9f <BROADCAST,MULTICAST,UP,LOWER_UP>

$ ip -br -4 addr show
lo               UNKNOWN        127.0.0.1/8
p2p1             UP             192.168.56.2/24
p7p1             UP             70.0.0.1/24
p8p1             DOWN           80.0.0.1/24
p9p1             UP             10.0.5.15/24
p7p1.100@p7p1    UP             200.0.0.1/24

$ ip -br -6 addr show
lo               UNKNOWN        ::1/128
p2p1             UP             fe80::a00:27ff:feee:b3b/64
p7p1             UP             7000::1/8 fe80::a00:27ff:fe9d:629f/64
p8p1             DOWN           8000::1/8
p9p1             UP             fe80::a00:27ff:fe76:d975/64
p7p1.100@p7p1    UP             fe80::a00:27ff:fe9d:629f/64

$ ip -br addr show p7p1
p7p1             UP             70.0.0.1/24 7000::1/8 fe80::a00:27ff:fe9d:629f/64

v2: Now with color support!
v3: Better field width estimation (except netdev names to keep output at a
decent width) and whitespace fixup.
Signed-off-by: Andy Gospodarek <gospo@cumulusnetworks.com>

Mostly just use of {} and whitespace.

Add little more info about how to manually set priority by iptables,
and some little clarifications about ingress/egress QoS mapping.
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>

Formatting JSON is moderately painful.
Provide a simple API to do the syntax formatting.

Add more explanation about VLAN reordering and what it affects.
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>

The previous man page fixup introduced a syntax error due to missing
opening bracket, which might crash some humanoid BNF parsers.

Fixes: 4e972d5e ("ip-address: fix and extend documentation")
Signed-off-by: Phil Sutter <phil@nwl.cc>

My previous patch 5950ba91 ("lib/namespace: don't leak fd in error case")
was a step in the wrong direction. Instead of closing the opened file
descriptor in error case only, follow a better approach here and close
the fd as soon as it is not used anymore. This way the inelegant goto
statements can be dropped, and the fd leak in non-error case is fixed as
well.

Fixes: 5950ba91 ("lib/namespace: don't leak fd in error case")
Signed-off-by: Phil Sutter <phil@nwl.cc>

Cut one level indentation to make things easier to read.
Signed-off-by: Zhang Shengju <zhangshengju@cmss.chinamobile.com>

Add missing return value to fix warnings
Signed-off-by: Zhang Shengju <zhangshengju@cmss.chinamobile.com>

Remove unnecessary retrun, because invarg() exit.
Signed-off-by: Zhang Shengju <zhangshengju@cmss.chinamobile.com>

 * Improve manual page synopsis and built-it help
 * Use full subcommand names (e.g. 'address' and 'maddress')
 * Specify when IPv4, IPv6 or both are affected
 * Add lifetimes, home and nodad
 * Remove any remaining excess spaces

Commit 43d29f78 substantially improves generated ip-address.8 instead of
ip-address.8.in and commit e419f2d6 removes the generated one losing the
improvements entirely. This commit recovers the lost changes, adapts
them to the current manual page and adds more man page and help
improvements.

Original commit by: Kenyon Ralph <kenyon@kenyonralph.com>

 * Add `can` to list of supported link types
 * Document `addrgenmode`
 * Document `link-netnsid`
 * Document VLAN link type
 * Improve VXLAN link type documentation
    - Fix VXLAN srcport/dstport docs
    - Document `udpcsum`, `udp6zerocsumtx` and `udp6zerocsumrx`

 * Use unabbreviated `address` and `maddress`
 * Keep only `-n` and `-netns` for network namespace

Enhance promtp message for 'spoofchk' and 'query_rss' flag, and fix a
typo.
Signed-off-by: Zhang Shengju <zhangshengju@cmss.chinamobile.com>

No need for extern on function prototypes.

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

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

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

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

This was working before, but only if realloc a) succeeded and b) did not
move the buffer to a different location. ''**buf = **new_buf' then
writes the value of *new_buf's first field into that of *buf.
Signed-off-by: Phil Sutter <phil@nwl.cc>

When showing bridge attributes, show also ageing_time, stp_state and
priority if available.
Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>

fix a typo: "noarp" -> "arp"
Signed-off-by: Zhang Shengju <zhangshengju@cmss.chinamobile.com>

Allow to print link type usage by: ip link help bridge_slave
Signed-off-by: Zhang Shengju <zhangshengju@cmss.chinamobile.com>

Allow to print link type usage by: ip link help bridge
Signed-off-by: Zhang Shengju <zhangshengju@cmss.chinamobile.com>

Add missing link type "bridge_slave".
Signed-off-by: Zhang Shengju <zhangshengju@cmss.chinamobile.com>

Change '-human-readble' to '-human-readable'.
Signed-off-by: Phil Sutter <phil@nwl.cc>

Save some space by using variable size for nsid cache elements.
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>

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

One option is required for bearer set and bearer get.

Reset the 'preferred_family' global variable
to its initially set value before each batch
file command is processed.
Signed-off-by: Antti Paila <antti.paila@gmail.com>

This is similar to command options corresponding to other NTF_* flags
already exposed to the user space (examples self/master).

Also updates bridge man page (The man page patch also includes
a fix to the 'self' entry and documents 'master' for fdb entries)
Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Reviewed-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>

Left over copy/paste from ip monitor man page.

Prefer using the POSIX constant PATH_MAX instead of the legacy BSD
derived MAXPATHLEN. The necessary includes for MAXPATHLEN and PATH_MAX
are <sys/param.h> and <limits.h>, respectively.
Signed-off-by: Felix Janda <felix.janda@posteo.de>
Tested-by: Yegor Yefremov <yegorslists@googlemail.com>

This patch adds support for ADDMDB/DELMDB notifications about router ports
which have been added or deleted/expired respectively.

Example output:
$ bridge -s monitor mdb
Deleted router port dev eth3 master br0
router port dev eth3 master br0
Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>

Make sure that return value of each socket() call is properly checked
and do not continue processing if the call failed.
Signed-off-by: Zhang Shengju <zhangshengju@cmss.chinamobile.com>

Remove dupldated include for <linux/xfrm.h>, since it's already
included by 'xfrm.h'.
Signed-off-by: Zhang Shengju <zhangshengju@cmss.chinamobile.com>

Error was:
f_bpf.o: In function `bpf_parse_opt':
f_bpf.c:(.text+0x88f): undefined reference to `secure_getenv'
m_bpf.o: In function `parse_bpf':
m_bpf.c:(.text+0x587): undefined reference to `secure_getenv'
collect2: error: ld returned 1 exit status

There is no special reason to use the secure version of getenv, thus let's
simply use getenv().

CC: Daniel Borkmann <daniel@iogearbox.net>
Fixes: 88eea539 ("tc: {f,m}_bpf: allow to retrieve uds path from env")
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@plumgrid.com>
Tested-by: Yegor Yefremov <yegorslists@googlemail.com>

Really by default ss dumps not only TCP sockets but any kind of socket
which is in ESTABLISHED state (TCP/UDP/UNIX).
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>
Reported-by: Miha Marolt <miham@beyondsemi.com>