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_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()
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