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Andrea Claudi d035cc1b4e ip tunnel: warn when changing IPv6 tunnel without tunnel name
Tunnel change fails if a tunnel name is not specified while using
'ip -6 tunnel change'. However, no warning message is printed and
no error code is returned.

$ ip -6 tunnel add ip6tnl1 mode ip6gre local fd::1 remote fd::2 tos inherit ttl 127 encaplimit none dev dummy0
$ ip -6 tunnel change dev dummy0 local 2001🔢:1 remote 2001🔢:2
$ ip -6 tunnel show ip6tnl1
ip6tnl1: gre/ipv6 remote fd::2 local fd::1 dev dummy0 encaplimit none hoplimit 127 tclass inherit flowlabel 0x00000 (flowinfo 0x00000000)

This commit checks if tunnel interface name is equal to an empty
string: in this case, it prints a warning message to the user.
It intentionally avoids to return an error to not break existing
script setup.

This is the output after this commit:
$ ip -6 tunnel add ip6tnl1 mode ip6gre local fd::1 remote fd::2 tos inherit ttl 127 encaplimit none dev dummy0
$ ip -6 tunnel change dev dummy0 local 2001🔢:1 remote 2001🔢:2
Tunnel interface name not specified
$ ip -6 tunnel show ip6tnl1
ip6tnl1: gre/ipv6 remote fd::2 local fd::1 dev dummy0 encaplimit none hoplimit 127 tclass inherit flowlabel 0x00000 (flowinfo 0x00000000)

Reviewed-by: Matteo Croce <mcroce@redhat.com>
Signed-off-by: Andrea Claudi <aclaudi@redhat.com>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
2019-07-16 12:26:21 -07:00
bash-completion tc: gred: support controlling RED flags 2018-11-24 07:11:36 -08:00
bridge Merge branch 'master' into next 2019-06-10 10:32:07 -07:00
devlink devlink: Remove enclosing array brackets binary print with json format 2019-07-15 13:50:55 -07:00
doc/actions doc: remove trailing whitespace 2018-12-19 12:02:38 -08:00
etc/iproute2 iproute2: Add support for a few routing protocols 2018-06-11 11:18:30 -07:00
examples examples: Remove cbq.init-v0.7.3 2018-12-18 10:52:35 -08:00
genl genl: remove dead code 2018-11-19 11:42:44 -08:00
include uapi: update uapi/magic.h 2019-07-16 11:56:58 -07:00
ip ip tunnel: warn when changing IPv6 tunnel without tunnel name 2019-07-16 12:26:21 -07:00
lib utils: don't match empty strings as prefixes 2019-07-15 13:48:48 -07:00
man Merge branch 'master' into next 2019-07-10 14:41:13 -07:00
misc ss: Change resolve_services to numeric 2019-07-09 14:54:34 -07:00
netem doc: remove trailing whitespace 2018-12-19 12:02:38 -08:00
rdma uapi: rdma netlink.h update 2019-07-16 11:58:44 -07:00
schema bridge: add json schema for bridge fdb show 2016-07-20 12:02:02 -07:00
tc tc: util: constrain percentage in 0-100 interval 2019-07-15 13:45:59 -07:00
testsuite Merge branch 'master' into next 2019-06-21 15:59:24 -07:00
tipc tipc: support interface name when activating UDP bearer 2019-06-28 16:03:16 -07:00
.clang-format clang-format: add configuration file 2019-01-17 13:38:23 -08:00
.gitignore Remove leftovers from removed Latex documentation 2018-02-13 16:43:19 -08:00
.mailmap mailmap: map David's mail address 2019-05-15 09:50:42 -07:00
COPYING Update address of FSF in license 2008-03-08 13:31:03 -08:00
Makefile Makefile: use make -C 2019-06-18 09:52:58 -07:00
README README: update libdb build dependency information 2018-05-01 19:29:03 -07:00
README.devel README: update location of git repositories, remove broken info link 2018-02-13 16:42:51 -08:00
README.distribution README cleanup's 2012-01-03 15:04:55 -08:00
README.iproute2+tc doc: remove trailing whitespace 2018-12-19 12:02:38 -08:00
README.lnstat doc: remove trailing whitespace 2018-12-19 12:02:38 -08:00
configure configure: fix typo in check_xt_old_internal_h 2019-01-07 14:42:01 -08:00

README

This is a set of utilities for Linux networking.

Information:
    https://wiki.linuxfoundation.org/networking/iproute2

Download:
    http://www.kernel.org/pub/linux/utils/net/iproute2/

Stable version repository:
    git://git.kernel.org/pub/scm/network/iproute2/iproute2.git

Development repository:
    git://git.kernel.org/pub/scm/network/iproute2/iproute2-next.git

How to compile this.
--------------------
1. libdbm

arpd needs to have the berkeleydb development libraries. For Debian
users this is the package with a name like libdbX.X-dev.
DBM_INCLUDE points to the directory with db_185.h which
is the include file used by arpd to get to the old format Berkeley
database routines.  Often this is in the db-devel package.

2. make

The makefile will automatically build a config.mk file which
contains definitions of libraries that may or may not be available
on the system such as: ATM, ELF, MNL, and SELINUX.

3. To make documentation, cd to doc/ directory , then
   look at start of Makefile and set correct values for
   PAGESIZE=a4		, ie: a4 , letter ...	(string)
   PAGESPERPAGE=2	, ie: 1 , 2 ...		(numeric)
   and make there. It assumes, that latex, dvips and psnup
   are in your path.

4. This package includes matching sanitized kernel headers because
   the build environment may not have up to date versions. See Makefile
   if you have special requirements and need to point at different
   kernel include files.

Stephen Hemminger
stephen@networkplumber.org

Alexey Kuznetsov
kuznet@ms2.inr.ac.ru