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bridge: epair pairs and jail loopback on FreeBSD - #11
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Give the bridge driver a FreeBSD create_veth_pair: create an epair, rename the a end to the host name when one is given, set MTU and MAC on the b end, move it into the jail, rename it there and add the a end to the bridge, then continue with the shared address, route and up steps. On teardown the bridge is removed when its member list from BRDGGIFS is empty, where Linux filters a link dump by controller. Interface indexes are global across vnets on FreeBSD, so the jail's lo0 is not index 1 and setup addresses it by name there. With this, setup against a VNET jail gives it eth0 with address, route and loopback, and the jail pings its gateway; teardown removes the epair and the empty bridge. Signed-off-by: Michael Johnson <buhnux@gmail.com>
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Give the bridge driver a FreeBSD create_veth_pair: create an epair,
rename the a end to the host name when one is given, set MTU and MAC on
the b end, move it into the jail, rename it there and add the a end to
the bridge, then continue with the shared address, route and up steps.
On teardown the bridge is removed when its member list from BRDGGIFS is
empty, where Linux filters a link dump by controller. Interface indexes
are global across vnets on FreeBSD, so the jail's lo0 is not index 1
and setup addresses it by name there.
With this, setup against a VNET jail gives it eth0 with address, route
and loopback, and the jail pings its gateway; teardown removes the epair
and the empty bridge.