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Jiri Benc df217d5d5c ip link gre: create interfaces in external mode correctly
For GRE interfaces in 'external' mode, the kernel ignores all manual
settings like remote IP address or TTL. However, for some of those
attributes, kernel checks their value and does not allow them to be zero
(even though they're ignored later).

Currently, 'ip link' always includes all attributes in the netlink message.
This leads to problem with creating interfaces in 'external' mode. For
example, this command does not work:

ip link add gre1 type gretap external

and needs a bogus remote IP address to be specified, as the kernel enforces
remote IP address to be either not present, or not null.

Ignore the parameters that do not make sense in 'external' mode.
Unfortunately, we cannot error out, as there may be existing deployments
that workarounded the bug by specifying bogus values.

Fixes: 926b39e1fe ("gre: add support for collect metadata flag")
Signed-off-by: Jiri Benc <jbenc@redhat.com>
2016-05-06 11:49:08 -07:00
bash-completion tc: add bash-completion function 2016-05-03 09:53:26 -07:00
bridge bridge: vlan: add support to filter by vlan id 2016-04-11 21:52:47 +00:00
devlink devlink: implement shared buffer occupancy control 2016-04-19 08:01:05 -07:00
doc doc/tc-filters.tex: Drop overly subjective paragraphs 2016-03-27 10:34:40 -07:00
etc/iproute2 {f, m}_bpf: allow for user-defined object pinnings 2015-11-29 11:55:16 -08:00
examples tc, bpf: add support for map pre/allocation 2016-04-11 21:54:47 +00:00
genl scrub out whitespace issues 2016-03-27 10:50:14 -07:00
include devlink: implement shared buffer occupancy control 2016-04-19 08:01:05 -07:00
ip ip link gre: create interfaces in external mode correctly 2016-05-06 11:49:08 -07:00
lib include: add linked list implementation from kernel 2016-03-27 10:56:11 -07:00
man devlink: add manpage for shared buffer 2016-04-19 08:01:05 -07:00
misc ss: take care of unknown min_rtt 2016-04-19 07:56:54 -07:00
netem scrub out whitespace issues 2016-03-27 10:50:14 -07:00
tc iproute2: tc_bpf.c: fix building with musl libc 2016-04-11 22:09:57 +00:00
testsuite testsuite: add a test for tc pedit action 2016-03-27 10:34:38 -07:00
tipc Revert "tipc: add peer remove functionality" 2016-02-09 10:51:32 -08:00
.gitignore doc: Add my article about tc, filters and actions 2016-03-04 15:29:00 -08:00
configure configure: Check for Berkeley DB for arpd compilation 2015-09-21 14:38:38 -07:00
COPYING Update address of FSF in license 2008-03-08 13:31:03 -08:00
Makefile tc: add bash-completion function 2016-05-03 09:53:26 -07:00
README README: update mail address and download location 2013-01-18 09:54:58 -08:00
README.decnet Decnet documentation update 2005-06-13 18:47:56 +00:00
README.devel iproute2: fix minor typo in comments 2011-07-11 10:11:09 -07:00
README.distribution README cleanup's 2012-01-03 15:04:55 -08:00
README.iproute2+tc tc, bpf: finalize eBPF support for cls and act front-end 2015-04-10 13:31:19 -07:00
README.lnstat Rename: misc/README.lnstat -> README.lnstat 2004-10-19 20:24:47 +00:00

This is a set of utilities for Linux networking.

Information:
    http://www.linuxfoundation.org/collaborate/workgroups/networking/iproute2

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

Repository:
    git://git.kernel.org/pub/scm/linux/kernel/git/shemminger/iproute2.git

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

arpd needs to have the db4 development libraries. For Debian
users this is the package with a name like libdb4.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 file which
contains whether or not ATM is available, etc.

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