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authorJosh Bailey <joshb@google.com>2011-07-20 20:45:12 -0700
committerJosh Bailey <joshb@google.com>2011-07-20 20:45:12 -0700
commit96450faf3385a6ed9f4dd5c2c58776c4a664a8da (patch)
tree26c56a71548686a7d6797b79377ccc5e25730186 /ports/files/md5
parent42ea68512fc4d04b500def45e8f899321f4081e7 (diff)
bgpd: Adds equal-paths check to path comparison. Paths that are
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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