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information based on the multipath list (mp_list) generated during
the best path calculation. Display "multipath" for paths that are
multipath and also on bestpath if the route is multipath. Flag a
best path with the BGP_INFO_MULTIPATH_CHG if the multipath
set has changed since the last update. This can be used to trigger
updates to zebra and peers.
The multipath markup is a lazily allocated bgp_info_mpath structure
that is added to the best path and any multipaths. The mpath structures
are linked together with the best path element at the head and the
other elements ordered by nexthop and then by peer address. This
markup scheme is updated by calling bgp_info_mpath_update() and passing
in a new mp_list the the current multipath set. There are additional
API's for walking the multipath set, querying the count of multipaths,
and for cleaning up the multipath markup information when freeing path
information.
* bgpd/bgp_mpath.c
* bgp_info_mpath_new(): Allocation of new mpath element
* bgp_info_mpath_free(): Release memory for mpath element
* bgp_info_mpath_get(): Access mpath element of path. Allocate memory
on-demand
* bgp_info_mpath_enqueue(): Enqueue a path onto the multipath list
* bgp_info_mpath_dequeue(): Remove a path from the multipath list
* bgp_info_mpath_first(): Return first path on the multipath list
* bgp_info_mpath_next(): Return next path on the multipath list
* bgp_info_mpath_count(): Return the number of paths on the multipath list
* bgp_info_mpath_count_set(): Set the number of paths on the multipath list
* bgp_info_mpath_update(): Update multipath markup on bgp route table entry
and flag any changes. Emit 'debug bgp event' output on any multipath
change.
* bgpd/bgp_mpath.h
* struct bgp_info_mpath: Information added to a bgp_info path to record
multipath information
* External declarations for new functions in bgp_mpath.c
* bgpd/bgp_route.c
* bgp_info_free(): Free mpath memory when freeing path information
* bgp_info_reap(): Dequeue path from multipath queue before deleting it
* bgp_best_selection(): Calls bgp_info_mpath_update() with latest
mp_list to mark-up rib table entry
* bgp_vty_out_detail(): Add display of multipath flag for a path. Also
display 'multipath' for bestpath if it is a multipath route
* bgpd/bgp_route.h
* struct bgp_info: Add pointer to bgp_info_mpath information
* Add flags to mark a path as multipath (BGP_INFO_MULTIPATH) and
to mark bestpath if multipath information has changed
(BGP_INFO_MULTIPATH_CHG)
* lib/memtypes.c
* Add MTYPE_BGP_MPATH_INFO for allocating memory for bgp_info_mpath
* tests/bgp_mpath_test.c
* Add test case for bgp_info_mpath_update() and supporting functions
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equal to the best path are accumulated onto an ordered list (mp_list)
if maximum-paths is configured. A future commit will add the
multipath markup to the BGP rib table based on the mp_list. Add
unit test for the added mp_list functions.
Deterministic MED is not supported in this commit, it will be
added later.
* bgpd/bgp_aspath.c
* Make aspath_cmp() an external symbol so it can be used in
equivalent paths check
* bgpd/bgp_aspath.h
* Add extern declaration of aspath_cmp()
* bgpd/bgp_mpath.c
* bgp_info_nexthop_cmp(): Compares nexthops of two paths
* bgp_info_mpath_cmp(): Compare function to order multipaths by
nexthop and then by peer address
* bgp_mp_list_init(): Initialize a list with the multipath order function
* bgp_mp_list_clear(): Clear out the mp_list
* bgp_mp_list_add(): Add a multipath to mp_list
* bgpd/bgp_mpath.h
* External declarations for above added functions in bgp_mpath.c
* bgpd/bgp_route.c
* bgp_info_cmp(): Add equivalent paths result (paths_eq). If eBGP
paths are equal down to IGP metric check, flag as equal if peer AS
matches. Similarly for iBGP paths but compare full AS_PATH.
* bgp_best_selection(): If multipath is enabled, accumulate equivalent paths
in mp_list. Add debug bgp event output to see result (will be filtered
later to display only when change occurs)
* bgp_process_rsclient(): Pass multipath config to bgp_best_selection()
* bgp_process_main(): Pass multipath config to bgp_best_selection()
* tests/bgp_mpath_test.c
* Add unit test case for bgp_mp_list functions
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* tests/bgp_mpath_test.c
* New file with test framework for testing BGP multipath
* Add test for CLI support functions
* tests/Makefile.am
* Add new testbgpmpath target
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There is support to configure this for each (AFI,SAFI), but
currently this configuration is only present for IPv4 unicast:
maximum-paths [ibgp] <1-255>
no maximum-paths [ibgp] [<1-255>]
* bgpd/Makefile.am
* Add bgp_mpath.h and bgp_mpath.c to build
* bgpd/bgp_mpath.h
* New file for bgp multipath declarations
* define BGP_DEFAULT_MAXPATHS
* bgpd/bgp_mpath.c
* bgp_maximum_paths_set(): Configure maximum paths for the given
afi, safi and bgp instance
* bgp_maximum_paths_unset(): Return maximum paths configuration to
the default setting for the given afi, safi and bgp instance
* bgpd/bgp_vty.c
* Define command strings for above CLI
* bgp_config_write_maxpaths(): Outputs configuration for the given
afi, safi and bgp instance
* Install command elements for IPv4 unicast
* bgpd/bgp_zebra.h
* bgp_config_write_maxpaths(): External declaration
* bgpd/bgpd.c
* bgp_create(): Initialize bgp instance to default maximum paths setting
* bgp_config_write_family(): Output maximum paths configuration
for the given address family
* bgp_config_write(): Output maximum paths configuration for
IPv4 unicast address family
* bgpd/bgpd.h
* struct bgp: Add storage for maximum paths configuration for
each afi, safi
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* bgp_route.c: ({no_,}ipv6_bgp_network_ttl_cmd) depends on ipv6_bgp_network
which is HAVE_IPV6, so these should be too.
(bgp_route_init) and the installs should be similarly ifdefed
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- SAFI value 3 is reserved. It was assigned by RFC 2858 for a use
that was never fully implemented, so it is deprecated by this
document.
* zebra.h: rename macro
* bgp_fsm.c: (bgp_graceful_restart_timer_expire,
bgp_graceful_stale_timer_expire, bgp_stop, bgp_establish): update
* bgpd.c: (peer_nsf_stop): update
* bgp_open.c: (bgp_capability_vty_out): SAFI 3 isn't a recognized case
any more
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This change is based on Xavier Beaudouin's patch (which fixes detection
of 3 config.h macros on FreeBSD without any impact to Linux build of
Quagga) and FreeBSD port patch (which fixes 5 config.h macros, but
breaks the Linux build), it fixes 5 macros and works for both FreeBSD 8
and Linux.
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Two macros resolving to the same integer constant broke a case block and
a more thorough merge of BGP_SAFI_VPNV4 and BGP_SAFI_VPNV6 was
performed.
* bgpd.h: MPLS-labeled VPN SAFI is AFI-independent, switch to single
* macro
* bgp_capability_test.c: update test data
* bgp_mp_attr_test.c: idem
* bgp_route.c: (bgp_maximum_prefix_overflow, bgp_table_stats_vty) update
macro and check conditions (where appropriate)
* bgp_packet.c: (bgp_route_refresh_send, bgp_capability_send,
bgp_update_receive, bgp_route_refresh_receive): idem
* bgp_open.c: (bgp_capability_vty_out, bgp_afi_safi_valid_indices,
bgp_open_capability_orf, bgp_open_capability): idem
* bgp_attr.c: (bgp_mp_reach_parse, bgp_packet_attribute,
bgp_packet_withdraw): idem
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* bgpd.h: change value of BGP_SAFI_VPNV6 to 128 (RFC4659, BZ#659)
* bgp_route.c: (bgp_table_stats_vty) fix length argument to strncmp()
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* ospf6_message.c: (ospf6_packet_max): new function, return maximum IPv6
payload on an interface; (ospf6_hello_send, ospf6_dbdesc_send,
ospf6_dbdesc_send_newone, ospf6_lsreq_send, ospf6_lsupdate_send_neighbor,
ospf6_lsupdate_send_interface, ospf6_lsack_send_neighbor,
ospf6_lsack_send_interface): compare message size with the maximum
payload instead of the MTU.
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"mtu-ignore" is an option ospfd used to mimic from the vendor's
implementation, now ospf6d will also implement it.
* ospf6_interface.h: extend ospf6_interface structure by one flag
* ospf6_interface.c: (ipv6_ospf6_mtu_ignore, no_ipv6_ospf6_mtu_ignore):
new declarations; (ospf6_interface_create): show initial value for
consistency; (ospf6_interface_show): print flag status
* ospf6_message.c: (ospf6_dbdesc_recv): consider interface-specific flag
when checking MTU
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* draft-ietf-idr-as-pathlimit doesn't seem to have gone anywhere, and its
author does not think it will make progress in IDR. Remove all support
introduced for it, but leave stubs for the commands to avoid breaking
any configurations.
Basically reverts cecab5e9725792e60a5e4b473e238a14cd85815d.
(cherry picked from commit c8f3fe3063cb9ff193b13011cfbda3e605395340)
Conflicts:
bgpd/bgp_attr.c (caused by c8e7b895, resolved)
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* bgp_attr.c: (bgp_attr_ext_communities) Certain extended-community attrs
can leave attr->flag indicating ext-community is present, even though no
extended-community object has been attached to the attr structure. Thus a
null-pointer dereference can occur later.
(bgp_attr_community) No bug fixed here, but tidy up flow so it has same
form as previous.
Problem and fix thanks to anonymous reporter.
(cherry picked from commit 0c46638122f10019a12ae9668aec91691cf2e017)
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(cherry picked from commit e6844aa5d23cf56dd1f31afc96e8145ab188953f)
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...A nasty bug, if you forgot to disable debugging, stored the config
and reboot your machine - if you really depend on ripd, then the machine
will not fully come back on the network, because ripd fails.
(cherry picked from commit 0fa0335316ce14a79ea4bbb0c40e1322c9941dd3)
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* bgpd/bgp_debug.c: fix VTY strings for BGP debug commands to match
correct syntax
(cherry picked from commit 6e22b9017e1ae2ce61c383b1b2b63973207704ac)
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* bgp_packet.c: (bgp_notify_receive) justify the difference between
BGP_NOTIFY_OPEN_UNSUP_PARAM and BGP_NOTIFY_OPEN_UNSUP_CAPBL cases, as
it is explained in RFC5492, page 3, paragraph 1.
"Unsupported Capability" error does not mean, that the peer doesn't
support capabilities advertisement -- quite the opposite (if the peer
would not support capabilities advertisement, the code would be
"Unsupported Optional Parameter"). Thus there is no reason to mark
the peer as one non-supporting capabilities advertisement.
Example: suppose the peer is in fact IPv6-only, but we didn't configure
anything address-family specific for it. Then, the peer would refuse
the session with "Unsupported Capability" code. If we internally set
the peer as non-supporting capabilities advertisement after that, we
will not be able to establish the session with it ever, even with a
fixed configuration -- IPv6-only BGP session cannot be established
without capabilities.
In practice an edge case would be seen as the same IPv6 peer working
with its "neighbor" block read from bgpd.conf, but not working, when
slowly input in "conf t" mode.
(cherry picked from commit c7aa8abd8788c3607ad0131f02e892cf92221e40)
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* ospf6_spf.c: Don't replace a node with another node with a lower
number of hops, instead get them from the queue in the correct
order. (Actually, the replacement crashed the ospf6d daemon
rather than worked.)
(cherry picked from commit 403138e189c24f6867824c4eeb668d11564e1ca0)
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* bgp_vty.c: (community_list_perror, show_ip_community_list_arg,
show_ip_extcommunity_list_arg) fix spelling
(cherry picked from commit b729294c8c5c6f2af8ddf6cfbea2374b6faabe9d)
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"mtu-ignore" is an option ospfd used to mimic from the vendor's
implementation, now ospf6d will also implement it.
* ospf6_interface.h: extend ospf6_interface structure by one flag
* ospf6_interface.c: (ipv6_ospf6_mtu_ignore, no_ipv6_ospf6_mtu_ignore):
new declarations; (ospf6_interface_create): show initial value for
consistency; (ospf6_interface_show): print flag status
* ospf6_message.c: (ospf6_dbdesc_recv): consider interface-specific flag
when checking MTU
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* zebra_routemap.c: (route_set_src) get rid of the dummy family variable.
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* bgp_aspath.c: (assegments_parse) just bail early if length doesn't match
and fix the formatting.
* bgp_network.c: add include needed for set_nonblocking
* bgp_packet.c: formatting
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* ospf_apiserver.{c,h}: (ospf_apiserver_lsa_refresher) refreshers must now
return the refreshed LSA.
* ospf_te.{c,h}: (ospf_mpls_te_lsa_refresh) ditto
* ospf_api.c: trivial compiler warning fix
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* ospf6_zebra.c: (ospf6_zebra_if_state_update) zebra_interface_state_read
may return NULL, if it can't find an interface, deal with it.
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* ospf6_zebra.c: (ospf6_zebra_if_state_update) zebra_interface_state_read
may return NULL, if it can't find an interface, deal with it.
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* bgp_routemap.c: (route_set_community_delete) When deleting a
community in a route-map the old community was being orphaned. Like
the description of the same code in route_set_community, this is a
hack, not a true fix.
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This reverts commit 2c9fd7e07283b8904ef20030c9dadb032e999b12.
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* doc/Makefile.am: pdf target needs to depend on all the input files.
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* bgp_attr.c: (attrhash_key_make) 98e30f should have changed jhash2 to jhash.
These kinds of merge errors would be reduced and life would be easier if
people would submit fully-formed fixes that could be chucked directly into
git-am.
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* bgpd.h: Add error code for setting GTSM on iBGP
* bgpd.c: (peer_ttl_security_hops_set) use previous error code and signal
incompatibility of GTSM+iBGP to vty.
Consider the session state when setting GTSM, and reset Open/Active peers
to let them pick up new TTL from start.
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In deciding whether to default ospfapi to on or off, use the same rule
for opaque-lsa as earlier: != no rather than = yes, so that not having
set it implies yes.
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* sockunion.c: (sockopt_minttl) Add IPv6 support for min hop count.
The kernel support is Linux kernel 2.6.35 or later.
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* bgp_vty.c: (peer_ebgp_multihop_{un,}set_vty) tail-call cleanup.
({no_,}neighbor_ttl_security) ditto.
* bgpd.c: (peer_ttl_security_hops_set) Peer group checks and TTL set only
need to be done on transition.
* sockunion.c: (sockopt_minttl) remove always-on debug and improve readability.
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* bgpd: Add support for RFC 5082 GTSM, which allows the TTL field to be used
to verify that incoming packets have been sent from neighbours no more
than X IP hops away. In other words, this allows packets that were sent from
further away (i.e. not by the neighbour with known distance, and so possibly
a miscreant) to be filtered out.
* lib/sockunion.{c,h}: (sockopt_minttl) new function, to set a minimum TTL
using the IP_MINTTL socket opt.
* bgpd.h: (BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK) define for command
error for minttl.
(struct peer) add a config variable, to store the configured minttl.
(peer_ttl_security_hops_{set,unset}) configuration handlers
* bgpd.c: (peer_group_get) init gtsm_hops
(peer_ebgp_multihop_{un,}set) check for conflicts with GTSM. Multihop and
GTSM can't both be active for a peer at the same time.
(peer_ttl_security_hops_set) set minttl, taking care to avoid conflicts with
ebgp_multihop.
(bgp_config_write_peer) write out minttl as "neighbor .. ttl-security hops X".
* bgp_vty.c: (bgp_vty_return) message for
BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK
(peer_ebgp_multihop_{un,}set_vty)
* bgp_network.c: (bgp_accept) set minttl on accepted sockets if appropriate.
(bgp_connect) ditto for outbound.
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* bgp_route.c: ({no_,}ipv6_bgp_network_ttl_cmd) depends on ipv6_bgp_network
which is HAVE_IPV6, so these should be too.
(bgp_route_init) and the installs should be similarly ifdefed
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The following patch was also neccessary to compile.
* command.c: (config_logmsg_cmd) use "%s" format spec
* if.c: (connected_log) ditto
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* bgp_attr.c; (attrhash_key_make) s6_addr is only member of in6_addr
guaranteed to be available - s6_addr32 isn't. Fix to be more portable, and
thus allow compilation on BSD again.
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* ospfd: Refresher logic cleanup broke OSPF opaque, which does its own thing
with regard to refresher logic and which also, in the protocol, requires
implementations to keep state of which OI an LSA is received on (rather
than providing information in the LSA to allow it to be looked up - as
other LSAs requiring such assocation were careful to do).
* ospf_lsa.h: (struct ospf_interface) Add back the pointer to oi, but only
for type-9 now.
* ospf_nsm.c: (ospf_db_summary_add) check the oi actually exists first -
doesn't obviate the need for opaque to ensure oi pointers get cleaned up
when ospf_interfaces disappear.
* ospf_opaque.{c,h}: (ospf_opaque_functab,ospf_opaque_lsa_refresh) Refresher
LSA functions now need to return the LSA to the general refresh logic,
to indicate whether the LSA was refreshed.
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* configure.ac: (AC_ARG_ENABLE({ospf-te,opaque-lsa})) reverse the sense to
--disable
(enable_{opaque_lsa,ospf_te}) treat as enabled unless explicitly disabled.
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* bgp_packet.c: (bgp_write) On BGP write, use TCP_CORK to provide hints to
kernel about TCP buffering. This will cause BGP packets to occur in
bigger chunks (full size MTU), improving performance and getting rid of
one of the problems reported in the UNH BGP conformance test.
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* sockunion.{c,h}: (sockopt_cork) wrapper for TCP_CORK socket option for
those platforms that provide it. For other platforms, it is just a nop.
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