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Use net_addr for interface address prefixes, support net_addr in
configuration parser.
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When a table is removed during reconfiguration, a reference was not
cleared in the old configuration, which breaks undo.
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Symbol lookup by cf_find_symbol() not only did the lookup but also added
new void symbols allocated from cfg_mem linpool, which gets broken when
lookups are done outside of config parsing, which may lead to crashes
during reconfiguration.
The patch separates lookup-only cf_find_symbol() and config-modifying
cf_get_symbol(), while the later is called only during parsing. Also
new_config and cfg_mem global variables are NULLed outside of parsing.
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New data types net_addr and variants (in lib/net.h) describing
network addresses (prefix/pxlen). Modifications of FIB structures
to handle these data types and changing everything to use these
data types instead of prefix/pxlen pairs where possible.
The commit is WiP, some protocols are not yet updated (BGP, Kernel),
and the code contains some temporary scaffolding.
Comments are welcome.
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The new RIP implementation fixes plenty of old bugs and also adds support
for many new features: ECMP support, link state support, BFD support,
configurable split horizon and more. Most options are now per-interface.
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Thanks to Peter Hudec for noticing the problem.
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Thanks to Andrew (seti.kr.ua) for the bug report.
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Kernel option 'merge paths' allows to merge routes exported to kernel
protocol (currently BGP and static routes) to multipath routes.
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In some cases, export filter accessed attributes of a different route.
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Related to changes from previous patch.
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In some circumstances during reconfiguration, routes propagated by pipes
to other tables may hang there even after the primary routes are removed.
There is already a workaround for this issue in the code which removes
these stale routes by flush process when source protocols are shut down.
This patch is a cleaner fix and allows to simplify the flush process
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Linux kernel route metrics (RTA_METRICS netlink route attribute) are
represented and accessible as new route attributes:
krt_mtu, krt_window, krt_rtt, krt_rttvar, krt_sstresh, krt_cwnd, krt_advmss,
krt_reordering, krt_hoplimit, krt_initcwnd, krt_rto_min, krt_initrwnd,
krt_quickack, krt_lock_mtu, krt_lock_window, krt_lock_rtt, krt_lock_rttvar,
krt_lock_sstresh, krt_lock_cwnd, krt_lock_advmss, krt_lock_reordering,
krt_lock_hoplimit, krt_lock_rto_min, krt_feature_ecn, krt_feature_allfrag
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Also hook feed_done is renamed to feed_end.
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Make proto_config_new() use this info instead of supplied size.
Thanks to Alexander V. Chernikov for the patch.
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Thanks to Alexander Chernikov for the patch.
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When multiple protocols have a lock for the same IP address, it crashes
under some circumstances.
Thanks to Matthias Schiffer for the bugreport.
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Message 'Network not in table' was not reported if a network node without
any routes was found in a routing table.
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Now the order is:
Up -> iface, addr, neigh
Down -> neigh, addr, iface
It fixes the case when an iface appears, related static routes are
activated and exported to OSPF before the iface notification and
therefore forwarding addresses are not encoded in generated external
LSAs.
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Shows routes that would be exported to the protocol but are rejected by
the export filter.
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Thanks to Frederik Kriewitz for the patch.
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Thanks to Sergey Popovich for the original patch.
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Thanks to Aleksey Berezin for the bugreport.
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Also significant core protocol state changes needed for that,
global graceful restart recovery state and kernel proto support
for recovery.
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