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2011-10-26bgpd: fix 2 more cases of length error reportingDenis Ovsienko
* bgp_attr.c (bgp_attr_originator_id, bgp_attr_cluster_list): provide required arguments to bgp_attr_malformed()
2011-10-22bgpd: check AGGREGATOR attr flags (BZ#678)Denis Ovsienko
* bgp_attr.c * bgp_attr_aggregator(): check Optional/Transitive flag bits
2011-10-19bgpd: fix more regressions in attr flag checksDenis Ovsienko
Commit 05a4936b713b9882171d0f7fb20b8439df23939e fixed some of the attributes involved, but not all. This commit should do it. * bgp_attr.c * bgp_attr_originator_id() * bgp_attr_cluster_list() * bgp_mp_reach_parse() * bgp_mp_unreach_parse()
2011-10-18bgpd: use bgp_attr_malformed()Denis Ovsienko
Some of the recent attribute flags/length checks copied from QRE use bgp_notify_send_with_data() directly, but master branch assumes using bgp_attr_malformed(). * bgp_attr.c * bgp_attr_med() * bgp_attr_local_pref() * bgp_attr_atomic() * bgp_attr_originator_id() * bgp_attr_cluster_list() * bgp_mp_reach_parse() * bgp_mp_unreach_parse()
2011-10-17bgpd: add flag checks for MP_(UN)REACH_NLRIDenis Ovsienko
* bgp_attr.[ch] * bgp_mp_reach_parse(): add extra arguments and a uniform flag check block * bgp_mp_unreach_parse(): idem * bgp_attr_parse(): provide extra arguments * bgp_mp_attr_test.c * parse_test(): justify respective calls
2011-10-17bgpd: fix spelling of CLUSTER_LISTDenis Ovsienko
2011-10-17bgpd: check CLUSTER_LIST attribute flagsDenis Ovsienko
* bgp_attr.c * bgp_attr_cluster_list(): accept extra argument, add checks for "optional", "transitive" and "partial" bits, log each error condition independently * bgp_attr_parse(): provide extra arguments
2011-10-17bgpd: check ORIGINATOR_ID attribute flagsDenis Ovsienko
* bgp_attr.c * bgp_attr_originator_id(): accept extra argument, add checks for "optional", "transitive" and "partial" bits, log each error condition independently * bgp_attr_parse(): provide extra arguments
2011-10-17IPv6 transport class suppportStephen Hemminger
IPv6 supports the same concept of differentiated service for routing protocols as IPv4, but like too many things, the standards committee decided that having two names for the same thing wasn't good enough and introduced a third more generic term transport class. The socket option to set transport class works the same as IPv4, but the arguments are different. * lib/sockopt.[ch] * setsockopt_ipv6_tclass(): new function * bgpd/bgp_network.c * bgp_connect(): set socket option * bgp_listener(): set socket option * ospf6d/ospf6_network.c * ospf6_set_transport_class(): new function * ospf6_serv_sock(): set socket option * ripngd/ripngd.c * ripng_make_socket(): set socket option
2011-10-12bgpd: fix regression in improved attr flag checksDenis Ovsienko
Commit 2febf323411c1aed9d7694898f852ce2ef36a7e5 assumed every flag bit except optional/transitive/partial unset, which at times could not be true for "extended length" bit. * bgp_attr.c * bgp_attr_origin(): exclude BGP_ATTR_FLAG_EXTLEN from comparison * bgp_attr_nexthop(): idem * bgp_attr_med(): idem * bgp_attr_local_pref(): idem * bgp_attr_atomic(): idem
2011-10-08bgpd: fix parsing of graceful restart cap. (#663)Peter Pentchev
"While setting up a testbed, I ran across a little problem in the parsing of the "graceful restart" BGP capability that resulted in Quagga not actually activating it for the peer in question - when the peer sent a single AFI/SAFI block." * bgp_open.c * bgp_capability_restart(): actually process the last AFI/SAFI block
2011-10-08bgpd: improve attr length error handling (BZ#679)Denis Ovsienko
* bgp_attr.c * bgp_attr_parse(): provide extra argument to bgp_attr_aggregator() * bgp_attr_local_pref(): use bgp_notify_send_with_data() * bgp_attr_atomic(): idem * bgp_attr_aggregator(): idem Conflicts: bgpd/bgp_attr.c
2011-09-30bgpd: improve attr flags checksDenis Ovsienko
Do not check each of the Optional/Transitive/Partial attribute flag bits, when their only valid combination is known in advance, but still perform bit-deep error message logging. This change assumes unused (low-order) 4 bits of the flag octet cleared. * bgp_attr.c * bgp_attr_origin(): rewrite check * bgp_attr_nexthop(): idem * bgp_attr_med(): idem * bgp_attr_local_pref(): idem * bgp_attr_atomic(): idem Conflicts: bgpd/bgp_attr.c
2011-09-30bgpd: ignore 4 bits of attribute flags byteDenis Ovsienko
2011-09-30bgpd: add missing "partial" flag checks (BZ#676)Denis Ovsienko
ORIGIN handling function used to have "partial" bit check and recent commits added it for NEXT_HOP, MULTI_EXIT_DISC and ATOMIC_AGGREGATE cases. This commit adds "partial" check for AS_PATH and LOCAL_PREF cases, which should leave attributes 1 through 6 inclusive completely covered with attribute flags checks. * bgp_attr.c * bgp_attr_origin(): use bit-by-bit checks for better diagnostics * bgp_attr_aspath(): add flag check * bgp_attr_local_pref(): idem Conflicts: bgpd/bgp_attr.c
2011-09-30bgpd: improve NEXT_HOP attribute checks (BZ#680)Denis Ovsienko
* lib/prefix.h * IPV4_CLASS_DE(): new helper macro * bgp_attr.c * bgp_attr_nexthop(): add check for "partial" bit, refresh flag error reporting, explain meaning of RFC4271 section 6.3 and implement it Conflicts: bgpd/bgp_attr.c
2011-09-29bgpd: rename SAFI 3 according to RFC4760Denis Ovsienko
- 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
2011-09-29bgpd: more SAFI fixesDenis Ovsienko
(with resolved conflict in bgpd/bgp_packet.c) 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
2011-09-29bgpd: fix SAFI for for MPLS labeled VPN-IPv6Denis Ovsienko
* 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()
2011-09-27bgpd: don't be confused by "unspecific" subcode in the NOTIFY message.Dmitrij Tejblum
* bgp_debug.c (bgp_notify_open_msg, bgp_notify_update_msg, bgp_notify_cease_msg, bgp_notify_capability_msg): add messages for "unspecific" subcode.
2011-09-27bgpd: spellingDenis Ovsienko
2011-09-27bgpd: spellingDenis Ovsienko
2011-09-27bgpd: check ATOMIC_AGGREGATE attr flags (BZ#678)Denis Ovsienko
* bgp_attr.c * bgp_attr_atomic(): accept extra argument, add checks for "optional", "transitive" and "partial" bits, log each error condition independently * bgp_attr_parse(): provide extra argument
2011-09-27bgpd: check MULTI_EXIT_DISC attr flags (BZ#677)Denis Ovsienko
* bgp_attr.c * bgp_attr_med(): add checks for "optional", "transitive" and "partial" bits, log each error condition independently
2011-09-27bgpd: check LOCAL_PREF attribute flags (BZ#674)Denis Ovsienko
* bgp_attr.c * bgp_attr_local_pref(): accept extra argument, add checks for "optional" and "transitive" bits, log each error condition independently * bgp_attr_parse(): provide extra argument
2011-09-27bgpd: add useful notification logs (BZ#616)heasley
* bgp_packet.c * bgp_notify_send_with_data(): add calls to zlog_info()
2011-09-27bgpd: consistent log msg format (BZ#565)heasley
2011-09-26bgpd: CVE-2011-3327 (ext. comm. buffer overflow)CROSS
This vulnerability (CERT-FI #513254) was reported by CROSS project. They have also suggested a fix to the problem, which was found acceptable. The problem occurs when bgpd receives an UPDATE message containing 255 unknown AS_PATH attributes in Path Attribute Extended Communities. This causes a buffer overlow in bgpd. * bgp_ecommunity.c * ecommunity_ecom2str(): perform size check earlier
2011-07-29Merge branch 'attr-errors'Paul Jakma
Contains BGP fixes: - set extcommunity crash: tihs patch tries to make the refcounting more robust but does not fully solve the problem, sadly. - BGP attribute error handling: Little testing.
2011-04-13bgpd: trivial format / warning fixesPaul Jakma
* 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
2011-04-01bgpd: fix memory leak when deleting a communityMichael Lambert
* 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.
2011-04-01Revert "bgpd: "Intern" communities in route maps"Paul Jakma
This reverts commit 2c9fd7e07283b8904ef20030c9dadb032e999b12.
2011-03-29bgpd: Fix merge error in jhash commitPaul Jakma
* 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.
2011-03-28bgpd: refine the setting up of GTSMStephen Hemminger
* 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.
2011-03-24bgpd: Cleanups & fixes for minttl / GTSMStephen Hemminger
* 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.
2011-03-23bgpd: RFC 5082 Generalized TTL Security Mechanism supportNick Hilliard
* 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.
2011-03-23bgpd: Fix compile failure if IPv6 build was disabled.Paul Jakma
* 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
2011-03-22bgpd: attribute jhash call should use a standard interface to in6_addr dataStephen Hemminger
* 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.
2011-03-21bgpd: enable TCP corkingStephen Hemminger
* 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.
2011-03-21bgpd: leave peer socket in non-blocking mode (mostly)Stephen Hemminger
* bgpd: Rather than toggling socket in/out of non-block mode, just leave it in nonblocking mode. One exception is in bgp_notify which only happens just before close.
2011-03-21bgpd: "Intern" communities in route mapsMichael Lambert
* bgp_community.[ch]: (community_lookup) New helper function to look up a community list in the hash table. * bgp_routemap.c: A new community structure was being allocated for every BGP update which matched a route map which set a community. This behavior led to rapid growth in the memory consumed by bgpd. Adding the communities to the hash table addresses the memory growth, but may introduce a problem in modifying or deleting the 'set community' statement in the route map.
2011-03-21bgpd: New show commands for improved view and address family supportMichael Lambert
Many show commands do not have support for multiple views and do not treat different address families uniformly. The following changes add a number of commands with support for views and rationalized treatment of IPv4 v IPv6 and unicast v multicast (such as in JUNOS, IOS XR and more recent versions of IOS). * bgp_route.c: (bgp_show_community) Inserted a new second argument (the name of the view) and the code to look up that name in the BGP structure. The NULL argument in the call to bgp_show (indicating the default view) was replaced by the specified view. The existing calls to bgp_show_community had a NULL second argument inserted to make clear that they refer to the default view. (top level) Added new functions via the DEFUN and/or ALIAS macros (and the associated command table entries) to add the commands show bgp ipv4 (unicast|multicast) show bgp ipv4 (unicast|multicast) A.B.C.D show bgp ipv4 (unicast|multicast) A.B.C.D/M show bgp ipv6 (unicast|multicast) show bgp ipv6 (unicast|multicast) X:X::X:X show bgp ipv6 (unicast|multicast) X:X::X:X/M These show either the full BGP table or the specified route or prefix for the given address family. show bgp view WORD (ipv4|ipv6) (unicast|multicast) community show bgp view WORD (ipv4|ipv6) (unicast|multicast) community \ (AA:NN|local-AS|no-advertise|no-export){1,4} For the specified view and address family, these show entries matching any community or the specified communit(y)(ies). show bgp view WORD (ipv4|ipv6) (unicast|multicast) neighbors \ (A.B.C.D|X:X::X:X) (advertised-routes|received-routes) For the specified view and address family, show the routes advertised to or received from the given BGP neighbor. show bgp [view WORD] ipv4 (unicast|multicast) \ rsclient (A.B.C.D|X:X::X:X) show bgp [view WORD] ipv4 (unicast|multicast) \ rsclient (A.B.C.D|X:X::X:X) A.B.C.D show bgp [view WORD] ipv4 (unicast|multicast) \ rsclient (A.B.C.D|X:X::X:X) A.B.C.D/M show bgp [view WORD] ipv6 (unicast|multicast) \ rsclient (A.B.C.D|X:X::X:X) show bgp [view WORD] ipv6 (unicast|multicast) \ rsclient (A.B.C.D|X:X::X:X) X:X::X:X show bgp [view WORD] ipv6 (unicast|multicast) \ rsclient (A.B.C.D|X:X::X:X) X:X::X:X/M For the specifed (optional) view and address family, show either the full BGP table or the specified route or prefix for the given route server client peer. * bgp_vty.c: (top level) Added new functions via the DEFUN and/or ALIAS macros (and the associated command table entries) to add the commands show bgp [view WORD] (ipv4|ipv6) (unicast|multicast) summary show bgp [view WORD] (ipv4|ipv6) (unicast|multicast) rsclient summary For the specified (optional) view and address family, display either the normal summary table for BGP peers, or the route server client table showing the import and export policies.
2011-03-21bgpd: Implement revised error handling for partial optional/trans. attributesPaul Jakma
* BGP error handling generally boils down to "reset session". This was fine when all BGP speakers pretty much understood all BGP messages. However the increasing deployment of new attribute types has shown this approach to cause problems, in particular where a new attribute type is "tunneled" over some speakers which do not understand it, and then arrives at a speaker which does but considers it malformed (e.g. corruption along the way, or because of early implementation bugs/interop issues). To mitigate this drafts before the IDR (likely to be adopted) propose to treat errors in partial (i.e. not understood by neighbour), optional transitive attributes, when received from eBGP peers, as withdrawing only the NLRIs in the affected UPDATE, rather than causing the entire session to be reset. See: http://tools.ietf.org/html/draft-scudder-idr-optional-transitive * bgp_aspath.c: (assegments_parse) Replace the "NULL means valid, 0-length OR an error" return value with an error code - instead taking pointer to result structure as arg. (aspath_parse) adjust to suit previous change, but here NULL really does mean error in the external interface. * bgp_attr.h (bgp_attr_parse) use an explictly typed and enumerated value to indicate return result. (bgp_attr_unintern_sub) cleans up just the members of an attr, but not the attr itself, for benefit of those who use a stack-local attr. * bgp_attr.c: (bgp_attr_unintern_sub) split out from bgp_attr_unintern (bgp_attr_unintern) as previous. (bgp_attr_malformed) helper function to centralise decisions on how to handle errors in attributes. (bgp_attr_{aspathlimit,origin,etc..}) Use bgp_attr_malformed. (bgp_attr_aspathlimit) Subcode for error specifc to this attr should be BGP_NOTIFY_UPDATE_OPT_ATTR_ERR. (bgp_attr_as4_path) be more rigorous about checks, ala bgp_attr_as_path. (bgp_attr_parse) Adjust to deal with the additional error level that bgp_attr_ parsers can raise, and also similarly return appropriate error back up to (bgp_update_receive). Try to avoid leaking as4_path. * bgp_packet.c: (bgp_update_receive) Adjust to deal with BGP_ATTR_PARSE_WITHDRAW error level from bgp_attr_parse, which should lead to a withdraw, by making the attribute parameter in call to (bgp_nlri_parse) conditional on the error, so the update case morphs also into a withdraw. Use bgp_attr_unintern_sub from above, instead of doing this itself. Fix error case returns which were not calling bgp_attr_unintern_sub and probably leaking memory. * tests/aspath_test.c: Fix to work for null return with bad segments
2011-03-21bgpd: Remove AS Path limit/TTL functionalityPaul Jakma
* 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.
2011-03-21bgpd: Try fix extcommunity resource allocation probs, particularly with 'set ↵Paul Jakma
extcom..' * Extended communities has some kind of resource allocation problem which causes a double-free if the 'set extcommunity ...' command is used. Try fix by properly interning extcommunities. Also, more generally, make unintern functions take a double pointer so they can NULL out callers references - a usefully defensive programming pattern for functions which make refs invalid. Sadly, this patch doesn't fix the problem entirely - crashes still occur on session clear. * bgp_ecommunity.h: (ecommunity_{free,unintern}) take double pointer args. * bgp_community.h: (community_unintern) ditto * bgp_attr.h: (bgp_attr_intern) ditto * bgp_aspath.h: (bgp_aspath.h) ditto * (general) update all callers of above * bgp_routemap.c: (route_set_ecommunity_{rt,soo}) intern the new extcom added to the attr, and unintern any old one. (route_set_ecommunity_{rt,soo}_compile) intern the extcom to be used for the route-map set. (route_set_ecommunity_*_free) unintern to match, instead of free (route_set_ecommunity_soo) Do as _rt does and don't just leak any pre-existing community, add to it (is additive right though?)
2011-03-21bgpd: Rollback some of the changes made for invalid AS_PATH segment fixPaul Jakma
Some of the changes made in commit cddb8112b80fa9867156c637d63e6e79eeac67bb don't work particularly well for other changes that need to be made to address BGP attribute error handling problems. In particular, returning a pointer from complex attribute data parsing functions will not suffice to express the require range of return status conditions. * bgp_aspath.c: (assegments_parse) Rollback to a more minimal set of changes to fix the original problem. (aspath_parse) Slightly needless pushing around of code, and taking 2 parameters to say whether ot use 2 or 4 byte encoding seems unnecessary. * bgp_attr.c: (bgp_attr_as{,4}path) Rollback, in preparation for BGP attribute error handling update.
2011-03-21bgpd/security: CVE-2010-1674 Fix crash due to extended-community parser errorPaul Jakma
* 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.
2011-03-21bgpd: use Jenkins hash for BGP transit, cluster and attr hashesStephen Hemminger
* bgp_attr.c: I observed while doing some debugging that even for simple tests there was a lot of hash collisions for BGP attributes. Switch to using Jhash rather than additive hashing. Probably overkill, but the function is fast and available. ({attrhash,cluster,transit}_hask_key_make) convert to Jenkins hash, instead of additive hash.
2011-03-21bgpd: Remove extra lock on interior table nodeBarry Friedman
If the radix tree creates an extra interior node in bgp_node_get(), it locks the interior node even though this node is not returned to the caller, so it may never be unlocked. The lock prevents this node from being deleted. * bgpd/bgp_table.c: (bgp_node_get) Remove lock on interior node which prevents proper node deletion
2011-03-21bgpd: Fix display of unsigned attributesWataru Tanitsu
* bgp_route.c: (route_vty_out*) The local prefix, metric and weight values are all stored as uint32_t. Change the format to %u so that large values are not displayed as negative integers.