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Some changes to symtab.c had broken the symbol reference handling for
prefix-lists in plist.c
This commit further "improves" the symbol table functions, to support
current use rather better. One key change is that the symbol table
supports the notion of a symbol which is "set", so has some value other
than its name.
In the case of prefix-lists, a prefix-list is "set" when there is at
least one (valid) entry or a description has been set.
Changes include:
* small changes in bgpd/bgp_clist.c where symbol table function names
have changed and other small differences.
* similarly in bgpd/bgp_peer_index.c, but here also clarified ownership
of the peer index entries, and ensured that the symbol table stuff
does *not* free same.
* in bgpd/bgp_route.c fixed the handling of references to prefix-lists.
Newer symbol handling more clearly identifies when a symbol has some
value "set".
* in bgpd/bgp_vty.c similarly, when showing state of filtering the "*"
against a prefix-list means it is "set".
* in lib/plist.c -- adjust to newer symbol table stuff. Fix issues
will add_hook and delete_hook. Changed lookup so that if plist
is not set, then lookup will return not-found -- so works as
before (!).
* adjusted test for symbol stuff.
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NB: this is a partial interim version -- NOT for production.
Reinstate vtysh. In bgpd: cope better with generating oversize messages.
The "pipework" branch is no more. There is now "euro_ix" and "euro_ix_b",
where 'b' stands for 'bleedin'. The "pipework" is currently in 'bleedin'.
Version updated to: 0.99.18ex20b
Major changes in this commit:
* modified bgpd to avoid crashing if an oversize message is created.
At present, any oversize messages are simply discarded. This may be a
mistake... since it is possible that some routes that should have been
withdrawn are not. TBA.
The stream lib facilities have been overhauled to may this easier.
* restoring vtysh.
At present the vtysh is thought to work, except that it does not
currently create integrated configuration files.
For the time being, *only* the following compile:
lib, bgpd, zebra, vtysh, tests
All other daemons will fail to compile, and must be disabled.
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Modified the symbol table so that the name of the symbol is now
a property of its value -- which simplifies some of the semantics,
because the name no longer has a separate existence (a name which
refers to an empty or undefined value is now a matter for the
value, not for the symbol table). It also allows for the symbol
table to be used where the value and the name are almost
indistinguishable.
Introduced AVL tree to support large prefix lists, routemaps,
etc. etc.
Updated testsymtab and added testavl.
Updated exiting use of the symbol table.
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Enabled building of the test programs. Added tests for vectors and
sybtabs.
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