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* (general) SPF memory management cleanup and fix for rare
double-free bug.
* ospf_spf.h: (struct vertex_parent) New struct to hold parent
specific data, eg the backlink and the parent vertex pointer,
and point to the appropriate general struct vertex_nexthop.
(struct vertex_nexthop) remove parent vertex pointer, so
this struct can be shared across vertices.
(struct vertex) rename list child to list children. Remove
list of nexthops, replace with list of vertex_parents.
* ospf_spf.c: (update_stat) trivial, remove cast from void *.
(vertex_nexthop_new) remove init of parent - field is gone
from struct vertex_nexthop.
(ospf_canonical_nexthops_free) Remove the canonical
vertex_nexthop memory objects. These are the vertex_nexthops
attached to the first level of router vertices from the root.
(vertex_parent_new) new function, create a vertex_parent.
(vertex_parent_free) ditto, but free it.
(ospf_vertex_new) Update to match changes to struct vertex.
(ospf_vertex_free) Recursively free a struct vertex and its
children. The parent list is used as a reference count.
vertex_nexthops must be free seperately, if required.
(ospf_vertex_dump) update to match struct vertex changes.
Print out backlink of parents too.
(ospf_vertex_add_parent) ditto.
(ospf_lsa_has_link) update comment.
(ospf_nexthop_add_unique) removed, not needed anymore.
(ospf_nexthop_merge) ditto.
(ospf_spf_consider_nexthop) renamed to ospf_spf_add_parent.
Simplified to just create vertex_parent and add it.
(ospf_spf_flush_parents) new function, flush out the parent
list.
(ospf_nexthop_calculation) Take the relevant route_lsa_link
as an argument, which simplifies things and removes the need
for the hack in ospf_nexthop_add_unique - ospf_spf_next
already knew exactly which link the cost calculated was for.
Update to match struct vertex changes too.
(ospf_spf_next) Don't create a vertex for W unnecessarily, if
it's there's a vertex already created for W, use it, and
hence there's no need to free it either.
Update some manipulation/comparisons of distance to match.
Flush the parent list if a lower cost path is found.
(ospf_spf_route_free) unused, removed.
(ospf_spf_dump) match the struct vertex changes, and dump the
ifname if possible.
(ospf_spf_calculate) At end of SPF, free the canonical nexthops
and call ospf_vertex_free on the root vertex to free the
entire tree.
* ospf_interface.c: (ospf_vl_set_params) match struct vertex
changes.
* ospf_route.c: (ospf_intra_route_add) ditto
(ospf_route_copy_nexthops_from_vertex) ditto
* memtypes.c: (memory_list_ospf) Add MTYPE_OSPF_VERTEX_PARENT.
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* (general) extern and static qualifiers added.
unspecified arguments in definitions fixed, typically they should
be 'void'.
function casts added for callbacks.
Guards added to headers which lacked them.
Proper headers included rather than relying on incomplete
definitions.
gcc noreturn function attribute where appropriate.
* ospf_opaque.c: remove the private definition of ospf_lsa's
ospf_lsa_refresh_delay.
* ospf_lsa.h: export ospf_lsa_refresh_delay
* ospf_packet.c: (ospf_make_md5_digest) make *auth_key const,
correct thing to do - removes need for the casts later.
* ospf_vty.c: Use vty.h's VTY_GET_INTEGER rather than ospf_vty's
home-brewed versions, shuts up several warnings.
* ospf_vty.h: remove VTY_GET_UINT32. VTY_GET_IPV4_ADDRESS and
VTY_GET_IPV4_PREFIX moved to lib/vty.h.
* ospf_zebra.c: (ospf_distribute_list_update_timer) hacky
overloading of the THREAD_ARG pointer should at least use
uintptr_t.
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* ospf_lsdb.h: Export ospf_lsdb_clean_stat() function.
* ospf_spf.h: Add link to the LSA stat structure into vertex.
* ospf_spf.c: New functions cmp() and update_stat() to manage
candidates. Remove ospf_spf_has_vertex(), ospf_vertex_lookup(),
ospf_install_candidate() and ospf_spf_register() functions not needed
any more. Update ospf_vertex_new(), ospf_spf_next() and
ospf_spf_calculate() functions to use pqueue instead of linked list.
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support of more significant changes not in this commit. The last item
in the ChangeLog below may be needed for p2mp to work correctly.
2004-08-31 David Wiggins <dwiggins@bbn.com>
* hash.c (hash_iterate): Save next pointer before calling
procedure, so that iteration works even if the called procedure
deletes the hash backet.
* linklist.h (listtail): new macro, not yet used.
2004-08-31 David Wiggins <dwiggins@bbn.com>
* ospf_spf.c (ospf_spf_calculate): Many more comments and debug
print statements. New function ospf_vertex_dump used in debugging.
2004-08-31 David Wiggins <dwiggins@bbn.com>
* ospf_spf.h (struct vertex): Comments for flags and structure members.
2004-08-31 David Wiggins <dwiggins@bbn.com>
* ospf_route.c: When finding an alternate route, log cost as well.
2004-08-31 David Wiggins <dwiggins@bbn.com>
* ospf_interface.c (ospf_lookup_if_params): Initialize af in
struct prefix allocated on stack.
2004-08-31 David Wiggins <dwiggins@bbn.com>
* ospf_packet.c (ospf_ls_ack_send_delayed): In p2mp mode, send
acks to AllSPFRouters, rather than All-DR.
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* ospf_spf.h: Add backlink field to struct vertex
* ospf_spf.h: (ospf_vertex_new) initialise backlink
(ospf_lsa_has_link) return index of link back to
vertex V from candidate vertex W, or -1 if no link exists.
(ospf_spf_next) save backlink index for candidate vertex
* ospf_interface.c: (ospf_vl_set_params) Use the backlink index
to determine correct address for virtual-link peers. Fall back
to older "pick first link" method if no backlink index exists.
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