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BSD systems cannot use SO_DONTROUTE, because it does not work properly with multicast packets (perhaps it tries to find iface based on multicast group address). But we can use MSG_DONTROUTE sendmsg() flag for unicast packets. Works on FreeBSD, is ignored on OpenBSD and is broken on NetBSD (i guess due to integrated routing table and ARP table).
18 lines
1000 B
Plaintext
18 lines
1000 B
Plaintext
Available configuration variables:
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CONFIG_AUTO_ROUTES Device routes are added automagically by the kernel
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CONFIG_SELF_CONSCIOUS We're able to recognize whether route was installed by us
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CONFIG_MULTIPLE_TABLES The kernel supports multiple routing tables
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CONFIG_ALL_TABLES_AT_ONCE Kernel scanner wants to process all tables at once
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CONFIG_SINGLE_ROUTE There is only one route per network
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CONFIG_MC_PROPER_SRC Multicast packets have source address according to socket saddr field
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CONFIG_SKIP_MC_BIND Don't call bind on multicast socket (def for *BSD)
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CONFIG_NO_IFACE_BIND Bind to iface is not available, use workarounds (def for *BSD)
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CONFIG_UNIX_DONTROUTE Use setsockopts DONTROUTE (undef for *BSD)
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CONFIG_DONTROUTE_UNICAST Use MSG_DONTROUTE flag for unicast packets (def for FreeBSD)
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CONFIG_USE_HDRINCL Use IP_HDRINCL instead of control messages for source address on raw IP sockets.
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CONFIG_RESTRICTED_PRIVILEGES Implements restricted privileges using drop_uid()
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