2008-08-17 Stephen Hemminger <stephen.hemminger@vyatta.com>
* zebra_rib.c: When doing a RIB update, routes in process of removal
should be ignored. This fixes bugs where a route is removed but a
recursive route is not changed.
[zebra:linux] netlink: no need to change privs for receive
2008-06-17 Stephen Hemminger <stephen.hemminger@vyatta.com>
* rt_netlink.c: (netlink_parse_info) Linux doesn't check privledges
on receive, so avoid the overhead of lowering and raising the
priviledges on each received message
2008-06-17 Stephen Hemminger <stephen.hemminger@vyatta.com>
* rt_netlink.c: (netlink_parse_info) There can be harmless races
such as adding an existing route, or deleting an already deleted
route. Don't bother logging these unless debugging is turned on.
[zebra:linux] netlink buffer size tweaking only needed on receive socket
2008-08-16 Stephen Hemminger <stephen.hemminger@vyatta.com>
* rt_netlink.c: (netlink_recvbuf) consolidate recvbuf setting
(netlink_socket) no need to set receive buffer on netlink sockets
generally
(kernel_init) set recvbuffer on the listen socket
2008-08-16 Stephen Hemminger <stephen.hemminger@vyatta.com>
* configure.ac: If netlink is available, then that is how the
initial routes and interfaces should be read, rather than through
/proc, so don't set IF_PROC.
[zebra:linux] clean up blocking setting of netlink sockets
2008-08-16 Stephen Hemminger <stephen.hemminger@vyatta.com>
* zebra/rt_netlink.c: This change removes the overhead of twiddling
the socket twice on every route change. The netlink support has
two sockets, one is used for request/response and should always
block. The other is used for asynchronous notification and should
always be non-blocking.
Paul Jakma [Fri, 15 Aug 2008 13:05:22 +0000 (14:05 +0100)]
[warnings] Fix various SOS warnings
2008-08-15 Paul Jakma <paul.jakma@sun.com>
* */*: Fix various problems flagged by Sun Studio compiler.
- '<qualifier> <storage>' obsolescent in declarations
- empty statements (';' after ALIAS definitions)
- implicit declarations (e.g printstack in lib/log.c)
- "\%" in printf string instead of "%%"
- loops that return on the first iteration (legitimately, but
compiler can't really know), e.g. bgp_routemap.c
- internal declarations which mask prototypes.
Paul Jakma [Fri, 15 Aug 2008 12:45:30 +0000 (13:45 +0100)]
[trivia] finish off static'ification of ospf6d and ripngd
2008-08-15 Paul Jakma <paul.jakma@sun.com>
* {ospf6d,ripngd}/*: Finish job of marking functions as static, or
exporting declarations for them, to quell warning noise with
Quagga's GCC default high-level of warning flags. Thus allowing
remaining, more useful warnings to be more easily seen.
[lib] hash compare function arguments ought to be const qualified
2008-08-14 Stephen Hemminger <stephen.hemminger@vyatta.com>
* lib/hash.h: (struct hash) Hash comparator callback really
ought to treat storage behind arguments as constant - a compare
function with side-effects would be evil.
* */*.c: Adjust comparator functions similarly, thus fixing at least
a few compiler warnings about const qualifier being dropped.
Timo Teräs [Wed, 13 Aug 2008 16:37:14 +0000 (17:37 +0100)]
[zebra:netlink] Set proto/scope on all route update messages
2008-08-13 Timo Teräs <timo.teras@iki.fi>
* zebra/rt_netlink.c: (netlink_route{,_multipath) Set protocol and
scope appropriately for both NEW and DELROUTE messages, to avoid
wiping out non-zebra routes on delete.
[build] Test for GNU-style PIE support in toolchain and enable
2008-08-13 Paul P Komkoff Jr <i@stingr.net>
* configure.ac: add a configure flag and autoconf macro, which will
determine if your toolchain supports PIE.
* */Makefile.am: add corresponding CFLAGS and LDFLAGS into
appropriate places.
Paul Jakma [Fri, 31 Aug 2007 13:27:37 +0000 (14:27 +0100)]
[bgpd] Add 'bgp open-accept' option, to send OPEN immediately on accepted conns
2007-08-31 Paul Jakma <paul.jakma@sun.com>
* (general) Add 'bgp open-accept' option, to allow bgpd to send OPEN
on accepted connections, i.e. to not wait till after
collision-detect to send OPEN, which appears to be allowed in
RFC4271. This may help speed up establishing sessions, or help
avoid FSM problems with sessions to certain peers. Not enabled by
default though.
Paul Jakma [Tue, 22 Jul 2008 21:11:48 +0000 (21:11 +0000)]
[bgpd] Fix triggerable crash when compiled with --disable-bgp-announce
2008-07-22 Paul Jakma <paul.jakma@sun.com>
* HACKING: Document preference for compiler conditional code, over
cpp conditional.
* configure.ac: DISABLE_BGP_ANNOUNCE always should be defined.
* bgp_{packet,route,advertise}.c: change to compiler testing of
DISABLE_BGP_ANNOUNCE, rather than cpp.
Paul Jakma [Tue, 22 Jul 2008 19:56:56 +0000 (19:56 +0000)]
[bgpd] fix a couple of trivial compiler warnings
2008-07-22 Paul Jakma <paul.jakma@sun.com>
* bgp_community.c: (community_str2com) assigns defaults to local
vars
* bgp_attr.c: (bgp_attr_parse) match format specifier to arg
* bgp_table.{c,h}: (bgp_table_top) can take a * to a const, quelling
warning in bgp_route.c
Paul Jakma [Mon, 21 Jul 2008 21:02:49 +0000 (21:02 +0000)]
[bgpd] TCP-MD5: password vty configuration and initial Linux support
2008-07-21 Paul Jakma <paul.jakma@sun.com>
* bgp_packet.c: (bgp_open_receive) fix warning in a zlog call
* bgp_vty.c: (bgp_vty_return) add return code
* bgpd.c: (bgp_master_init) setup the socket list.
* bgp_network.c: Remove the dual IPv4/6 socket thing for now, which
was implemented by Michael, until such time as its clear its
required for Linux (see sockopt comments). IPv6 support, including
IPv4 sessions on AF_INET6 sockets, therefore is broken, and the
'-l 0.0.0.0' arguments would need to be given to bgpd to make
things work here.
2008-07-21 Michael H. Warfield <mhw@wittsend.com>
YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Tomohiko Kusuda <kusuda@inetcore.com>
Leigh Brown <leigh@solinno.co.uk>
* bgp_network.c: (bgp_md5_set_one) shim between libzebra tcp-md5
sockopt and bgpd.
(bgp_md5_set_socket) Helper for bgp_connect
(bgp_md5_set) setup TCP-MD5SIG for the given peer.
(bgp_connect) call out to bgp_md5_set_socket for the outgoing
connect socket.
(bgp_socket) save references to the listen sockets, needed if
TCP-MD5SIG is applied later or changed.
* bgp_vty.c: (*neighbor_password_cmd) New 'neighbor ... password'
commands.
* bgpd.c: (peer_{new,delete) manage TCP-MD5 password
(peer_group2peer_config_copy) inherit TCP-MD5 password
(peer_password_{un,}set) orchestrate the whole add/remove of TCP-MD5
passwords: applying checks, stopping peers, and trying to return
errors to UI, etc.
(bgp_config_write_peer) save password.
Fix missing newline in writeout of neighbor ... port.
2008-07-21 Paul Jakma <paul.jakma@sun.com>
* sockunion.c: ifdef out various places that converted
v4mapped sockets to pure v4. Doesn't seem necessary at all,
presumably a workaround for now historical inet_ntop bugs (?)
2008-07-21 Michael H. Warfield <mhw@wittsend.com>
YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Paul Jakma [Thu, 3 Jul 2008 20:41:08 +0000 (20:41 +0000)]
[solaris] Sync SMF bits with OpenSolaris SFW
2008-07-03 Paul Jakma <paul.jakma@sun.com>
* quagga.{xml,init}.in: Sync with OpenSolaris SFW. This changes the
SMF schema used, from the SMF schema supplied initially with
Quagga, to the version which was approved by the Sun PSARC for
inclusion into Solaris. This change is incompatible. Settings,
such as vty_port, etc. will not transfer over. The Sun schema is
however supported by Sun, and supports running Quagga in a zone
with IP instances, and configuration via the routeadm utility.
Paul Jakma [Wed, 2 Jul 2008 02:12:07 +0000 (02:12 +0000)]
[bgpd] Fix double-free crash in bgp_table_finish, seen with rs-client
2008-07-02 Stephen Hemminger <stephen.hemminger@vyatta.com>
* bgp_table.{c,h}: (bgp_table_finish) Take a double pointer and
scrub pointer in caller, so fixing double-free crashes seen
with route-server-client configuration.
* *.c: Adjust all callers of bgp_table_finish
2008-07-02 Paul Jakma <paul.jakma@sun.com>
* bgp_table.{c,h}: (bgp_node_delete, bgp_table_free) shouldn't be
exported.
Paul Jakma [Tue, 1 Jul 2008 18:24:58 +0000 (18:24 +0000)]
[zebra] Make BSD link-state deal more gracefully with GIFMEDIA ioctl error
2008-07-01 Paul Jakma <paul.jakma@sun.com>
* ioctl.c: (if_get_flags) Deal more gracefully with failure
of the BSD link-state SIOCGIFMEDIA ioctl, as some interfaces
apparently don't implement it (e.g. tun).
Also, make BSD link-state checking be conditional on the
'link-detect' interface configuration flag, as it should be.
Fixes bug #465.
Paul Jakma [Sat, 7 Jun 2008 20:37:10 +0000 (20:37 +0000)]
[bgpd] minor changes to bgp_mp_reach_parse
2008-06-07 Paul Jakma <paul@jakma.org>
* bgp_attr.{c,h}: (bgp_mp_{un,}reach_parse) export, for unit tests.
* bgp_attr.c: (bgp_mp_reach_parse) Add logging. Tighten length test
to bounds check against the attribute length rather than the
stream length..
* bgp_attr.c: (bgp_attr_aspathlimit) fix silly bug in flags check
that was causing BGP to drop sessions if it received a
aspath-limit with partial set. Fixes bug #419.
Paul Jakma [Thu, 29 May 2008 18:23:08 +0000 (18:23 +0000)]
[zebra/linux] Use BPF to filter out responses, to try avoid netlink overruns
2008-05-29 Stephen Hemminger <stephen.hemminger@vyatta.com>
* rt_netlink.c: (netlink_install_filter) BPF filter to catch and
drop responses to zebra's own route messages.
(kernel_init) add BPF filter on the netlink socket.
Paul Jakma [Thu, 28 Feb 2008 23:26:02 +0000 (23:26 +0000)]
[lib] Fix the struct message LOOKUP function to be more robust
2008-02-28 Paul Jakma <paul.jakma@sun.com>
* log.c: (mes_lookup) Sowmini Varadhan diagnosed a problem where
this function can cause a NULL dereference, on lookups for unknown
indices, or messages with NULL strings. Can occur, e.g., debug
logging code when processing received messages. Fixed to accept a
pointer to a default string to be used if there is no match.
* log.h: LOOKUP adjusted to match
Paul Jakma [Thu, 28 Feb 2008 00:09:04 +0000 (00:09 +0000)]
[lib/linklist] Enforce "nodes must have data" invariant more rigorously
2008-02-28 Paul Jakma <paul.jakma@sun.com>
* linklist.c: This implementation expects that the data pointer not
be null, e.g. listgetdata() asserts this. The list add methods
don't apply the same sanity check.
Paul Jakma [Tue, 26 Feb 2008 09:16:09 +0000 (09:16 +0000)]
[c++] remove/rename some names in headers that clash with C++ reserved words
2008-01-30 Peter Szilagyi <sp615@hszk.bme.hu>
* lib/stream.h: Remove named 'new' parameter in prototype
for c++ header compatibility.
* ospfd/ospf_opaque.h: ditto
* ospfd/ospfd.h: Renamed struct export to _export for c++
header compatibility.
* ospf6d/ospf6_area.h: ditto
Paul Jakma [Tue, 29 Jan 2008 19:29:44 +0000 (19:29 +0000)]
[isisd] Bug #437: fix ssert caused by bad list management
2008-01-29 James Carlson <james.d.carlson@sun.com>
* Fix bug #437, assert due to bogus index management
* isis_flags.c: (flags_initialize) new
* (flags_get_index) fix off by one, leading to list assert
on null node data.
(flags_free_index) ditto.
* isisd.c: (isis_area_create) use flags_initialize
(isis_area_destroy) deconfigure circuits when
taking down area.
Andrew J. Schorr [Fri, 11 Jan 2008 15:57:13 +0000 (15:57 +0000)]
[link-detect] Improve BSD support.
2008-01-11 Andrew J. Schorr <ajschorr@alumni.princeton.edu>
* lib/zebra.h: Revert previous change, no need to include
<net/if_media.h> here.
* zebra/ioctl.c: If HAVE_BSD_LINK_DETECT is defined, include
<net/if_media.h>
(if_get_flags) Remove debug messages about BSD link state.
* zebra/kernel_socket.c: (bsd_linkdetect_translate) If link state
is unknown, we should set the IFF_RUNNING flag.
Andrew J. Schorr [Thu, 10 Jan 2008 15:24:32 +0000 (15:24 +0000)]
[link-detect] Try to get BSD link-detect to work properly.
2008-01-10 Ingo Flaschberger <if@xip.at>
* configure.ac: Define HAVE_BSD_LINK_DETECT if <net/if_media.h> is
present.
* lib/zebra.h: If HAVE_BSD_LINK_DETECT is defined,
include <net/if_media.h>.
* zebra/ioctl.c: (if_get_flags) If HAVE_BSD_LINK_DETECT, use the
SIOCGIFMEDIA ioctl to ascertain link state.
* zebra/kernel_socket.c: (bsd_linkdetect_translate) New function to
map the ifm_data.ifi_link_state value into the IFF_RUNNING flag.
(ifm_read) Call bsd_linkdetect_translate to fix the IFF_RUNNING
flag before calling if_flags_update.
[link-detect] Static interface routes should behave properly with link-detect.
2008-01-08 Michael Larson <mike@vyatta.com>
* zebra_rib.c: (nexthop_active_check) Replace if_is_up with
if_is_operative to solve problems with static interface
routes not behaving properly with link-detect.
Paul Jakma [Sat, 22 Dec 2007 16:49:52 +0000 (16:49 +0000)]
[bgpd] Fix number of DoS security issues, restricted to configured peers.
2007-12-22 Paul Jakma <paul.jakma@sun.com>
* Fix series of vulnerabilities reported by "Mu Security
Research Team", where bgpd can be made to crash by sending
malformed packets - requires that bgpd be configured with a
session to the peer.
* bgp_attr.c: (bgp_attr_as4_path) aspath_parse may fail, only
set the attribute flag indicating AS4_PATH if we actually managed
to parse one.
(bgp_attr_munge_as4_attrs) Assert was too general, it is possible
to receive AS4_AGGREGATOR before AGGREGATOR.
(bgp_attr_parse) Check that we have actually received the extra
byte of header for Extended-Length attributes.
* bgp_attr.h: Fix BGP_ATTR_MIN_LEN to account for the length byte.
* bgp_open.c: (cap_minsizes) Fix size of CAPABILITY_CODE_RESTART,
incorrect -2 left in place from a development version of as4-path
patch.
* bgp_packet.c: (bgp_route_refresh_receive) ORF length parameter
needs to be properly sanity checked.
* tests/bgp_capability_test.c: Test for empty capabilities.
Paul Jakma [Mon, 22 Oct 2007 18:34:41 +0000 (18:34 +0000)]
[ospf6d] Fix removal of defunct ASBR routes
2007-10-22 Phil Spagnolo <phillip.a.spagnolo@boeing.com>
* ospf6_asbr.c: (ospf6_asbr_lsentry_remove) Remove shortcut
of LSDB search - it's based on assumption non-BEST routes
can't have ASBR routes, which appears to be wrong. Safest to
search.
Paul Jakma [Sun, 14 Oct 2007 22:32:21 +0000 (22:32 +0000)]
[bgpd] Merge AS4 support
2007-10-14 Paul Jakma <paul.jakma@sun.com>
* NEWS: Note that MRT dumps are now version 2
* (general) Merge in Juergen Kammer's AS4 patch.
2007-09-27 Paul Jakma <paul.jakma@sun.com>
* bgp_aspath.c: (assegment_normalise) remove duplicates from
from sets.
(aspath_reconcile_as4) disregard a broken part of the RFC around
error handling in path reconciliation.
* aspath_test.c: Test dupe-weeding from sets.
Test that reconciliation merges AS_PATH and AS4_PATH where
former is shorter than latter.
2007-09-26 Paul Jakma <paul.jakma@sun.com>
* aspath_test.c: Test AS4_PATH reconcilation where length
of AS_PATH and AS4_PATH is same.
2007-09-25 Paul Jakma <paul.jakma@sun.com>
* bgp_open.c: (peek_for_as4_capability) Fix to work.
* bgp_packet.c: (bgp_open_receive) Fix sanity check of as4.
* tests/bgp_capability_test.c: (general) Extend tests to validate
peek_for_as4_capability.
Add test of full OPEN Option block, with multiple capabilities,
both as a series of Option, and a single option.
Add some crap to beginning of stream, to prevent code depending
on getp == 0.
2007-09-18 Paul Jakma <paul.jakma@sun.com>
* bgp_open.c: (bgp_capability_as4) debug printf inline with others.
(peek_for_as4_capability) There's no need to signal failure, as
failure is better dealt with through full capability parser -
just return the AS4, simpler.
* bgp_packet.c: (bgp_open_receive) Update to match
peek_for_as4_capability change.
Allow use of BGP_AS_TRANS by 2b speakers.
Use NOTIFY_OPEN_ERR rather than CEASE for OPEN parsing errors.
(bgp_capability_msg_parse) missing argument to debug print
(bgp_capability_receive) missing return values.
* tests/bgp_capability_test.c: (parse_test) update for changes to
peek_for_as4_capability
2007-07-25 Paul Jakma <paul.jakma@sun.com>
* Remove 2-byte size macros, just make existing macros take
argument to indicate which size to use.
Adjust all users - typically they want '1'.
* bgp_aspath.c: (aspath_has_as4) New, return 1 if there are any
as4's in a path.
(aspath_put) Return the number of bytes actually written, to
fix the bug Juergen noted: Splitting of segments will change
the number of bytes written from that already written to the
AS_PATH header.
(aspath_snmp_pathseg) Pass 2-byte flag to aspath_put. SNMP
is still defined as 2b.
(aspath_aggregate) fix latent bug.
(aspath_reconcile_as4) AS_PATH+NEW_AS_PATH reconciliation
function.
(aspath_key_make) Hash the AS_PATH string, rather than
just taking the addition of assegment ASes as the hash value,
hopefully sligthly more collision resistant.
(bgp_attr_munge_as4_attrs) Collide the NEW_ attributes
together with the OLD 2-byte forms, code Juergen
had in bgp_attr_parse but re-organised a bit.
(bgp_attr_parse) Bunch of code from Juergen moves
to previous function.
(bgp_packet_attribute) Compact significantly by
just /always/ using extended-length attr header.
Fix bug Juergen noted, by using aspath_put's
(new) returned size value for the attr header rather
than the (guesstimate) of aspath_size() - the two could
differ when aspath_put had to split large segments, unlikely
this bug was ever hit in the 'wild'.
(bgp_dump_routes_attr) Always use extended-len and
use aspath_put return for header length. Output 4b ASN
for AS_PATH and AGGREGATOR.
* bgp_ecommunity.c: (ecommunity_{hash_make,cmp}) fix
hash callback declarations to match prototypes.
(ecommunity_gettoken) Updated for ECOMMUNITY_ENCODE_AS4,
complete rewrite of Juergen's changes (no asdot support)
* bgp_open.c: (bgp_capability_as4) New, does what it says
on the tin.
(peek_for_as4_capability) Rewritten to use streams and
bgp_capability_as4.
* bgp_packet.c: (bgp_open_send) minor edit
checked (in the abstract at least) with Juergen.
Changes are to be more accepting, e.g, allow AS_TRANS on
a 2-byte session.
* (general) Update all commands to use CMD_AS_RANGE.
* bgp_vty.c: (bgp_clear) Fix return vals to use CMD_..
Remove stuff replicated by VTY_GET_LONG
(bgp_clear_vty) Return bgp_clear directly to vty.
* tests/aspath_test.c: Exercise 32bit parsing. Test reconcile
function.
* tests/ecommunity_test.c: New, test AS4 ecommunity changes,
positive test only at this time, error cases not tested yet.
2007-07-25 Juergen Kammer <j.kammer@eurodata.de>
* (general) AS4 support.
* bgpd.h: as_t changes to 4-bytes.
* bgp_aspath.h: Add BGP_AS4_MAX and BGP_AS_TRANS defines.
* bgp_aspath.c: AS_VALUE_SIZE becomes 4-byte, AS16_VALUE_SIZE
added for 2-byte.
Add AS16 versions of length calc macros.
(aspath_count_numas) New, count number of ASes.
(aspath_has_as4) New, return 1 if there are any as4's in a
path.
(assegments_parse) Interpret assegment as 4 or 2 byte,
according to how the caller instructs us, with a new
argument.
(aspath_parse) Add use32bit argument to pass to
assegments_parse. Adjust all its callers to pass 1, unless
otherwise noted.
(assegment_data_put) Adjust to be able to write 2 or 4 byte
AS, according to new use32bit argument.
(aspath_put) Adjust to write 2 or 4.
(aspath_gettoken) Use a long for passed in asno.
* bgp_attr.c: (attr_str) Add BGP_ATTR_AS4_PATH and
BGP_ATTR_AS4_AGGREGATOR.
(bgp_attr_aspath) Call aspath_parse with right 2/4 arg, as
determined by received-capability flag.
(bgp_attr_aspath_check) New, code previously in attr_aspath
but moved to new func so it can be run after NEW_AS_PATH
reconciliation.
(bgp_attr_as4_path) New, handle NEW_AS_PATH.
(bgp_attr_aggregator) Adjust to cope with 2/4 byte ASes.
(bgp_attr_as4_aggregator) New, read NEW_AGGREGATOR.
(bgp_attr_parse) Add handoffs to previous parsers for the two
new AS4 NEW_ attributes.
Various checks added for NEW/OLD reconciliation.
(bgp_packet_attribute) Support 2/4 for AS_PATH and
AGGREGATOR, detect when NEW_ attrs need to be sent.
* bgp_debug.{c,h}: Add 'debug bgp as4'.
* bgp_dump.c: MRTv2 support, unconditionally enabled, which
supports AS4. Based on patches from Erik (RIPE?).
* bgp_ecommunity.c: (ecommunity_ecom2str) ECOMMUNITY_ENCODE_AS4
support.
* bgp_open.c: (peek_for_as4_capability) New, peek for AS4
capability prior to full capability parsing, so we know which
ASN to use for struct peer lookup.
(bgp_open_capability) Always send AS4 capability.
* bgp_packet.c: (bgp_open_send) AS4 handling for AS field
(bgp_open_receive) Peek for AS4 capability first, and figure
out which AS to believe.
* bgp_vty.c: (bgp_show_peer) Print AS4 cap
* tests/aspath_test.c: Support asn32 changes, call aspath_parse
with 16 bit.
* vtysh/extract.pl: AS4 compatibility for router bgp ASNUMBER
* vtysh/extract.pl.in: AS4 compatibility for router bgp ASNUMBER
* vtysh/vtysh.c: AS4 compatibility for router bgp ASNUMBER
Paul Jakma [Tue, 18 Sep 2007 18:07:18 +0000 (18:07 +0000)]
[privs/Solaris] Quagga should work in zones with IP instances
2007-09-18 Paul Jakma <paul.jakma@sun.com>
* privs.c: definition of ZCAP_NET_ADMIN on Solaris should
be PRIV_SYS_IP_CONFIG, when that's available. Thus allowing
Quagga to work with in Solaris zones with exclusive IP
instances.
Paul Jakma [Tue, 18 Sep 2007 12:11:26 +0000 (12:11 +0000)]
[bgpd] Fix typo, which prevented advertisement of MP (non-IPv4) prefixes
2007-09-17 Paul Jakma <paul.jakma@sun.com>
* bgp_open.c: (bgp_capability_mp) We were setting
afc_nego[safi][safi] rather than afc_nego[afi][safi], thus
failling to announce any non-IPv4 prefixes. Remove the extra,
typo-ed character.
* bgp_capability_test.c: Test that peer's adv_recv and adv_nego get
set correctly for MP capability and given AFI/SAFI.
Colour OK/failed result so it's easier to find them.
+ fixed bug #402: now the second zebra process doesn't destroy routes
of the first one before dying
+ we are not going to receive routing messages originated by old_pid,
because rib_sweep_route() is called after damon() now. This will allow
to drop old_pid completely soon.
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