Software Package Data Exchange identifiers help to detect source file
licenses and hence simplify the FOSS compliance process.

Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com>

https://github.com/thom311/libnl/pull/219

---

FILES=(
  lib/addr.c
  lib/attr.c
  lib/cache.c
  lib/cache_mngr.c
  lib/cache_mngt.c
  lib/data.c
  lib/error.c
  lib/fib_lookup/lookup.c
  lib/fib_lookup/request.c
  lib/genl/ctrl.c
  lib/genl/family.c
  lib/genl/genl.c
  lib/genl/mngt.c
  lib/handlers.c
  lib/hash.c
  lib/hashtable.c
  lib/idiag/idiag.c
  lib/idiag/idiag_meminfo_obj.c
  lib/idiag/idiag_msg_obj.c
  lib/idiag/idiag_req_obj.c
  lib/idiag/idiag_vegasinfo_obj.c
  lib/mpls.c
  lib/msg.c
  lib/netfilter/ct.c
  lib/netfilter/ct_obj.c
  lib/netfilter/exp.c
  lib/netfilter/exp_obj.c
  lib/netfilter/log.c
  lib/netfilter/log_msg.c
  lib/netfilter/log_msg_obj.c
  lib/netfilter/log_obj.c
  lib/netfilter/netfilter.c
  lib/netfilter/nfnl.c
  lib/netfilter/queue.c
  lib/netfilter/queue_msg.c
  lib/netfilter/queue_msg_obj.c
  lib/netfilter/queue_obj.c
  lib/nl.c
  lib/object.c
  lib/route/act.c
  lib/route/addr.c
  lib/route/class.c
  lib/route/classid.c
  lib/route/cls.c
  lib/route/link.c
  lib/route/neigh.c
  lib/route/neightbl.c
  lib/route/netconf.c
  lib/route/nexthop.c
  lib/route/nexthop_encap.c
  lib/route/nh_encap_mpls.c
  lib/route/pktloc.c
  lib/route/qdisc.c
  lib/route/route.c
  lib/route/route_obj.c
  lib/route/route_utils.c
  lib/route/rtnl.c
  lib/route/rule.c
  lib/route/tc.c
  lib/socket.c
  lib/utils.c
  lib/version.c
  lib/xfrm/ae.c
  lib/xfrm/lifetime.c
  lib/xfrm/sa.c
  lib/xfrm/selector.c
  lib/xfrm/sp.c
  lib/xfrm/template.c
  src/genl-ctrl-list.c
  src/idiag-socket-details.c
  src/lib/addr.c
  src/lib/class.c
  src/lib/cls.c
  src/lib/ct.c
  src/lib/exp.c
  src/lib/link.c
  src/lib/neigh.c
  src/lib/qdisc.c
  src/lib/route.c
  src/lib/rule.c
  src/lib/tc.c
  src/lib/utils.c
  src/nf-ct-add.c
  src/nf-ct-events.c
  src/nf-ct-list.c
  src/nf-exp-add.c
  src/nf-exp-delete.c
  src/nf-exp-list.c
  src/nf-log.c
  src/nf-monitor.c
  src/nf-queue.c
  src/nl-addr-add.c
  src/nl-addr-delete.c
  src/nl-addr-list.c
  src/nl-class-add.c
  src/nl-class-delete.c
  src/nl-class-list.c
  src/nl-classid-lookup.c
  src/nl-cls-add.c
  src/nl-cls-delete.c
  src/nl-cls-list.c
  src/nl-fib-lookup.c
  src/nl-link-enslave.c
  src/nl-link-ifindex2name.c
  src/nl-link-list.c
  src/nl-link-name2ifindex.c
  src/nl-link-release.c
  src/nl-link-set.c
  src/nl-link-stats.c
  src/nl-list-caches.c
  src/nl-list-sockets.c
  src/nl-monitor.c
  src/nl-neigh-add.c
  src/nl-neigh-delete.c
  src/nl-neigh-list.c
  src/nl-neightbl-list.c
  src/nl-pktloc-lookup.c
  src/nl-qdisc-add.c
  src/nl-qdisc-delete.c
  src/nl-qdisc-list.c
  src/nl-route-add.c
  src/nl-route-delete.c
  src/nl-route-get.c
  src/nl-route-list.c
  src/nl-rule-list.c
  src/nl-tctree-list.c
  src/nl-util-addr.c
)

sed '1s#^#/* SPDX-License-Identifier: LGPL-2.1-only */\n#' "${FILES[@]}" -i

It would be desirable not to include kernel headers in our public
libnl3 headers. As a test, remove all those includes, and fix
compilation by explicitly including the kernel headers where needed.
In some cases, that requires forward declaration for kernel
structures, as we use them as part of our own headers.

Realistically, we cannot drop those includes as it probalby breaks
compilation for users that expect to get a certain kernel header
when including a libnl3 header. So, this will not be done and the
includes will be restored in the next commit.

Do this step to show how it would be and to verify that we could
build with such a change. The reason not to do this is backward
compatibility (at compile-time).

This makes runtime removal of cache operations possible if non-safe
API is not in use by application. The non-safe API will be removed
in the next major version.

Signed-off-by: Thomas Graf <tgraf@suug.ch>

Moved common code in src/ used by CLI tools to src/lib/ for possible use
by other CLI tools. Just link to libnl-cli.{so|la}

- Moved env var dumping to nl-addr-list.c
- support for ipv6 lifetimes
- correct and complete help texts