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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
2011-10-12bgpd: 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: 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: 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
2011-09-27bgpd: 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: consistent log msg format (BZ#565)heasley
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.
2011-03-29bgpd: 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.
2011-03-22bgpd: 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: 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.
2010-10-06bgpd, lib: adopt afi_t and safi_t in several placesMichael Lambert
* bgpd/bgp_attr.c, bgpd/bgp_open.h, bgpd/bgp_route.c, lib/prefix.c, lib/prefix.h: Various integer types were being used where, if we had strict type checking, afi_t and safi_t would be required. Signed-off-by: G.Balaji <balajig81@gmail.com> (cherry picked from commit c8af35ffa2dc79ff7d7ff00b1b61f1f50a100ab6)
2010-08-09bgpd: fix handling of AS path dataChris Hall
* bgpd/bgp_aspath.c * assegments_parse(): add handling of AS4_PATH input, update bounds checks, add check for AS segment type * aspath_parse(): add handling of AS4_PATH input, expect assegments_parse() to do length checking * aspath_empty(): update for the new function prototype * bgpd/bgp_aspath.h: ditto * tests/aspath_test.c: ditto * bgpd/bgp_attr.c * bgp_attr_aspath(): add handling of AS4_PATH input, update flags checks, change returned type * bgp_attr_as4_path(): discard, superseded by bgp_attr_aspath() * bgp_attr_parse(): update respectively
2009-07-30bgpd: Workaround for invalid MBGP next hopMichael Lambert
* bgp_attr.c: (bgp_mp_reach_parse) There are some interoperability issues for MBGP (particularly IPv4 multicast NLRI) between different implementations. In order to get some next hops to install correctly in the BGP tables, it appears to be necessary to copy the multiprotocol next hop into the base next hop field. This is related to differences in RFC 2283 and RFC 2858.
2009-07-28bgpd: Implement BGP confederation error handling (RFC5065, Par. 5)Vasilis Tsiligiannis
This patch implements BGP confederation error handling in Quagga as described in RFC5065, paragraph 5. * bgp_aspath.c: (aspath_confed_check, aspath_left_confed_check) new functions * bgp_attr.c: (bgp_attr_aspath_check) apply previous and NOTIFY if there's a problem.
2009-07-19[bgpd] Stability fixes including bugs 397, 492Chris Caputo
I've spent the last several weeks working on stability fixes to bgpd. These patches fix all of the numerous crashes, assertion failures, memory leaks and memory stomping I could find. Valgrind was used extensively. Added new function bgp_exit() to help catch problems. If "debug bgp" is configured and bgpd exits with status of 0, statistics on remaining lib/memory.c allocations are printed to stderr. It is my hope that other developers will use this to stay on top of memory issues. Example questionable exit: bgpd: memstats: Current memory utilization in module LIB: bgpd: memstats: Link List : 6 bgpd: memstats: Link Node : 5 bgpd: memstats: Hash : 8 bgpd: memstats: Hash Bucket : 2 bgpd: memstats: Hash Index : 8 bgpd: memstats: Work queue : 3 bgpd: memstats: Work queue item : 2 bgpd: memstats: Work queue name string : 3 bgpd: memstats: Current memory utilization in module BGP: bgpd: memstats: BGP instance : 1 bgpd: memstats: BGP peer : 1 bgpd: memstats: BGP peer hostname : 1 bgpd: memstats: BGP attribute : 1 bgpd: memstats: BGP extra attributes : 1 bgpd: memstats: BGP aspath : 1 bgpd: memstats: BGP aspath str : 1 bgpd: memstats: BGP table : 24 bgpd: memstats: BGP node : 1 bgpd: memstats: BGP route : 1 bgpd: memstats: BGP synchronise : 8 bgpd: memstats: BGP Process queue : 1 bgpd: memstats: BGP node clear queue : 1 bgpd: memstats: NOTE: If configuration exists, utilization may be expected. Example clean exit: bgpd: memstats: No remaining tracked memory utilization. This patch fixes bug #397: "Invalid free in bgp_announce_check()". This patch fixes bug #492: "SIGBUS in bgpd/bgp_route.c: bgp_clear_route_node()". My apologies for not separating out these changes into individual patches. The complexity of doing so boggled what is left of my brain. I hope this is all still useful to the community. This code has been production tested, in non-route-server-client mode, on a linux 32-bit box and a 64-bit box. Release/reset functions, used by bgp_exit(), added to: bgpd/bgp_attr.c,h bgpd/bgp_community.c,h bgpd/bgp_dump.c,h bgpd/bgp_ecommunity.c,h bgpd/bgp_filter.c,h bgpd/bgp_nexthop.c,h bgpd/bgp_route.c,h lib/routemap.c,h File by file analysis: * bgpd/bgp_aspath.c: Prevent re-use of ashash after it is released. * bgpd/bgp_attr.c: #if removed uncalled cluster_dup(). * bgpd/bgp_clist.c,h: Allow community_list_terminate() to be called from bgp_exit(). * bgpd/bgp_filter.c: Fix aslist->name use without allocation check, and also fix memory leak. * bgpd/bgp_main.c: Created bgp_exit() exit routine. This function frees allocations made as part of bgpd initialization and, to some extent, configuration. If "debug bgp" is configured, memory stats are printed as described above. * bgpd/bgp_nexthop.c: zclient_new() already allocates stream for ibuf/obuf, so bgp_scan_init() shouldn't do it too. Also, made it so zlookup is global so bgp_exit() can use it. * bgpd/bgp_packet.c: bgp_capability_msg_parse() call to bgp_clear_route() adjusted to use new BGP_CLEAR_ROUTE_NORMAL flag. * bgpd/bgp_route.h: Correct reference counter "lock" to be signed. bgp_clear_route() now accepts a bgp_clear_route_type of either BGP_CLEAR_ROUTE_NORMAL or BGP_CLEAR_ROUTE_MY_RSCLIENT. * bgpd/bgp_route.c: - bgp_process_rsclient(): attr was being zero'ed and then bgp_attr_extra_free() was being called with it, even though it was never filled with valid data. - bgp_process_rsclient(): Make sure rsclient->group is not NULL before use. - bgp_processq_del(): Add call to bgp_table_unlock(). - bgp_process(): Add call to bgp_table_lock(). - bgp_update_rsclient(): memset clearing of new_attr not needed since declarationw with "= { 0 }" does it. memset was already commented out. - bgp_update_rsclient(): Fix screwed up misleading indentation. - bgp_withdraw_rsclient(): Fix screwed up misleading indentation. - bgp_clear_route_node(): Support BGP_CLEAR_ROUTE_MY_RSCLIENT. - bgp_clear_node_queue_del(): Add call to bgp_table_unlock() and also free struct bgp_clear_node_queue used for work item. - bgp_clear_node_complete(): Do peer_unlock() after BGP_EVENT_ADD() in case peer is released by peer_unlock() call. - bgp_clear_route_table(): Support BGP_CLEAR_ROUTE_MY_RSCLIENT. Use struct bgp_clear_node_queue to supply data to worker. Add call to bgp_table_lock(). - bgp_clear_route(): Add support for BGP_CLEAR_ROUTE_NORMAL or BGP_CLEAR_ROUTE_MY_RSCLIENT. - bgp_clear_route_all(): Use BGP_CLEAR_ROUTE_NORMAL. Bug 397 fixes: - bgp_default_originate() - bgp_announce_table() * bgpd/bgp_table.h: - struct bgp_table: Added reference count. Changed type of owner to be "struct peer *" rather than "void *". - struct bgp_node: Correct reference counter "lock" to be signed. * bgpd/bgp_table.c: - Added bgp_table reference counting. - bgp_table_free(): Fixed cleanup code. Call peer_unlock() on owner if set. - bgp_unlock_node(): Added assertion. - bgp_node_get(): Added call to bgp_lock_node() to code path that it was missing from. * bgpd/bgp_vty.c: - peer_rsclient_set_vty(): Call peer_lock() as part of peer assignment to owner. Handle failure gracefully. - peer_rsclient_unset_vty(): Add call to bgp_clear_route() with BGP_CLEAR_ROUTE_MY_RSCLIENT purpose. * bgpd/bgp_zebra.c: Made it so zclient is global so bgp_exit() can use it. * bgpd/bgpd.c: - peer_lock(): Allow to be called when status is "Deleted". - peer_deactivate(): Supply BGP_CLEAR_ROUTE_NORMAL purpose to bgp_clear_route() call. - peer_delete(): Common variable listnode pn. Fix bug in which rsclient was only dealt with if not part of a peer group. Call bgp_clear_route() for rsclient, if appropriate, and do so with BGP_CLEAR_ROUTE_MY_RSCLIENT purpose. - peer_group_get(): Use XSTRDUP() instead of strdup() for conf->host. - peer_group_bind(): Call bgp_clear_route() for rsclient, and do so with BGP_CLEAR_ROUTE_MY_RSCLIENT purpose. - bgp_create(): Use XSTRDUP() instead of strdup() for peer_self->host. - bgp_delete(): Delete peers before groups, rather than after. And then rather than deleting rsclients, verify that there are none at this point. - bgp_unlock(): Add assertion. - bgp_free(): Call bgp_table_finish() rather than doing XFREE() itself. * lib/command.c,h: Compiler warning fixes. Add cmd_terminate(). Fixed massive leak in install_element() in which cmd_make_descvec() was being called more than once for the same cmd->strvec/string/doc. * lib/log.c: Make closezlog() check fp before calling fclose(). * lib/memory.c: Catch when alloc count goes negative by using signed counts. Correct #endif comment. Add log_memstats_stderr(). * lib/memory.h: Add log_memstats_stderr(). * lib/thread.c: thread->funcname was being accessed in thread_call() after it had been freed. Rearranged things so that thread_call() frees funcname. Also made it so thread_master_free() cleans up cpu_record. * lib/vty.c,h: Use global command_cr. Add vty_terminate(). * lib/zclient.c,h: Re-enable zclient_free().
2009-06-18[bgpd/cleanup] BGP make attribute variables localStephen Hemminger
Message lists can be read-only, and hash tables are local to this code.
2009-06-12[cleanup] functions taking no args should be declared with void argsStephen Hemminger
Use Ansi-C prototypes rather than old K&R method of declaring function without arguments
2009-06-12[cleanup] Convert XMALLOC/memset to XCALLOCStephen Hemminger
Simple conversion of XMALLOC/memset to XCALLOC
2009-04-30[bgpd] AS4 bugfix by Chris Caputo <ccaputo@alt.net>Denis Ovsienko
* bgpd/bgp_aspath.c: (aspath_make_str_count) "assert (len < str_size)" was getting hit under certain 4-byte ASN conditions. New realloc strategy. * bgpd/bgp_aspath.c: (aspath_key_make) const warning fix. "%d" -> "%u" 4-byte ASN corrections. Prevent negative number when ASN is above 2^31.
2008-08-22[warnings] Fix various SOS warningsPaul Jakma
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.
2008-08-22[lib] hash compare function arguments ought to be const qualifiedStephen Hemminger
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. Signed-off-by: Paul Jakma <paul@quagga.net>
2008-07-22[bgpd] fix a couple of trivial compiler warningsPaul Jakma
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
2008-06-07[bgpd] minor changes to bgp_mp_reach_parsePaul Jakma
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..
2008-06-01[bgpd] bug #419: partial aspath-limit incorrectly causes session resetPaul Jakma
2008-06-01 jfletche@gmail.com * 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.
2008-03-13[bgpd] remove unnecessary 0 entries from struct message'sPaul Jakma
2008-03-13 Paul Jakma <paul.jakma@sun.com> * (various) Remove 0 entries from struct message's, unneeded due to recent improvements in mes_lookup/LOOKUP.
2007-12-22[bgpd] Fix number of DoS security issues, restricted to configured peers.Paul Jakma
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.
2007-10-14[bgpd] Merge AS4 supportPaul Jakma
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
2007-09-07[bgpd] low-impact DoS: crash on malformed community with debug setPaul Jakma
2007-09-07 Paul Jakma <paul.jakma@sun.com> * (general) bgpd can be made crash by remote peers if debug bgp updates is set, due to NULL pointer dereference. Reported by "Mu Security Research Team", <security@musecurity.com>. * bgp_attr.c: (bgp_attr_community) If community length is 0, don't set the community-present attribute bit, just return early. * bgp_debug.c: (community_str,community_com2str) Check com pointer before dereferencing.
2007-08-30[bgpd] bug #398 Bogus free on out route-map, and assert() with rsclientsPaul Jakma
2007-08-27 Paul Jakma <paul.jakma@sun.com> * bgp_route.c: (bgp_announce_check) Fix bug #398, slight modification of Vladimir Ivanov's suggested fix - to keep memory alloc conditional. (bgp_process_announce_selected) Don't take struct attr as argument, none of the callers need it and it needlessly distances allocation from use. Free the extended attr, the attr itself is on the stack. Fix bad indentation. * bgp_attr.c: (bgp_packet_attribute) Remove incorrect assert, and adjust conditional to test attr->extra, diagnosis by Vladimir Ivanov in bug #398. 2007-08-27 Vladimir Ivanov <wawa@yandex-team.ru> * bgp_route.c: (bgp_announce_check_rsclient) copy of ri->attr is no longer deep enough, due to addition of attr->extra. It should use bgp_attr_dup, as bgp_announce_check() does.
2007-08-06[bgpd] Add support for AS_PATHLIMIT / draft-ietf-idr-as-pathlimitPaul Jakma
2007-07-31 Paul Jakma <paul.jakma@sun.com> * (general) Support for draft-ietf-idr-as-pathlimit-03. * bgp_attr.h: (struct attr) Add pathlimit struct bgp_attr.c: (attr_str) Add BGP_ATTR_AS_PATHLIMIT string. (attrhash_key_make) tally pathlimit too (attrhash_cmp) cmp pathlimit attr (bgp_attr_aspathlimit) New, parse AS_PATHLIMIT attr. (bgp_attr_parse) ditto (bgp_packet_attribute) Write out AS_PATHLIMIT when set (bgp_dump_routes_attr) ditto * bgp_route.h: (struct bgp_static) Add TTL field * bgp_route.c: (bgp_announce_check) Drop paths that are over their hop-count TTL before sending via EBGP. Mangle ASN in pathlimit for confeds/private as best we can. (bgp_static_update_{rsclient,main}) Add any configure pathlimit information. (bgp_pathlimit_update_parents) New, update atomic-aggr setting for parents of an aspathlimit'ed static. (bgp_static_set) Add TTL argument, for all the 'bgp network' commands. Call previous for TTL changed statics. (bgp_static_unset) Call pathlimit_update_parents. (various bgp network commands) Add 'pathlimit <0-255>' qualifier to all the various forms, bar route-map - which can set ttl itself. * bgp_routemap.c: (general) Add support for 'set pathlimit ttl' and 'match pathlimit as'. * doc/bgpd.texi: Document 'network ... pathlimit <ttl>'
2007-05-04[bgpd] Trim memory usage of BGP routesPaul Jakma
2007-05-03 Paul Jakma <paul.jakma@sun.com> * bgp_route.h: (struct info) Move less frequently used fields to a lazily allocated struct info_extra. Export bgp_info_extra_get * bgp_route.c: (bgp_info_extra_new) allocate extra (bgp_info_extra_free) Free damp info and the info_extra. (bgp_info_extra_get) Retrieve the info_extra of a struct info, allocating as required. (generally) adjust to use info->extra * bgp_damp.c: (generally) use bgp_info_extra_get to access dampinfo * bgp_attr.h: Move rarely allocated attributes from struct attr to a struct attr_extra, for a substantial saving in size of struct attr. * bgp_attr.c: (bgp_attr_extra_{new,free}), new, self-explanatory. (bgp_attr_extra_get) Get the attr_extra for a given struct attr, allocating it if needs be. (bgp_attr_dup) Shallow copy the struct attr and its attr_extra. (generally) adjust to know about attr->extra. * bgp_debug.c: (bgp_dump_attr) ditto * bgp_vty.c: (show_bgp_memory) print attr and info extra sizes. * bgp_nexthop.c: (generally) adjust to know about attr->extra and info->extra. * bgp_{packet,routemap,snmp,zebra}.c: ditto * lib/memtypes.c: Add MTYPE_ATTR_EXTRA and MTYPE_BGP_ROUTE_EXTRA
2007-04-29[bgpd] Use defines for default weightPaul Jakma
2007-04-22 Sebastien Tandel <sebastien@tandel.be> * bgp_attr.h : Definition of BGP_ATTR_DEFAULT_WEIGHT. * bgp_attr.c : (bgp_attr_default_intern) now uses bgp_attr_default_set instead of duplicating the same code. (general) Use of BGP_ATTR_DEFAULT_WEIGHT. Replace two 16 by IPV6_MAX_BYTELEN.