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bird/sysdep/cf/README
Ondrej Zajicek e0ed978e75 Netlink: Handle onlink flag on BSD-Netlink
On BSD, the onlink flag is not tracked or reported by kernel. We are
using an heuristic that assigns the onlink flag to routes scanned from
the kernel. We should use the same heuristic even in BSD-Netlink
case, as the onlink flag is not reported here too.

Thanks to Björn König for the original patch.
2024-12-12 04:04:07 +01:00

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Available configuration variables:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
CONFIG_AUTO_ROUTES Device routes are added automagically by the kernel
CONFIG_SELF_CONSCIOUS We're able to recognize whether route was installed by us
CONFIG_MULTIPLE_TABLES The kernel supports multiple routing tables
CONFIG_SINGLE_ROUTE There is only one route per network
CONFIG_ASSUME_ONLINK Assume ONLINK flag on scanned routes based on a heuristic
CONFIG_MC_PROPER_SRC Multicast packets have source address according to socket saddr field
CONFIG_SKIP_MC_BIND Don't call bind on multicast socket (def for *BSD)
CONFIG_NO_IFACE_BIND Bind to iface is not available, use workarounds (def for *BSD)
CONFIG_UNIX_DONTROUTE Use setsockopts DONTROUTE (undef for *BSD)
CONFIG_DONTROUTE_UNICAST Use MSG_DONTROUTE flag for unicast packets (def for FreeBSD)
CONFIG_USE_HDRINCL Use IP_HDRINCL instead of control messages for source address on raw IP sockets.
CONFIG_RESTRICTED_PRIVILEGES Implements restricted privileges using drop_uid()
CONFIG_MADV_DONTNEED_TO_FREE To free pages, use MADV_DONTNEED instead of MADV_FREE (linux)
CONFIG_DISABLE_THP Disable transparent huge pages (linux)