Re: bind reacts badly to dhcpcd losing/regaining connectivity

[Robert Elz <kre%munnari.OZ.AU@localhost>]

    Date:        Sun, 16 Apr 2017 06:48:28 +0700
    From:        Robert Elz <kre%munnari.OZ.AU@localhost>
    Message-ID:  <17026.1492300108%andromeda.noi.kre.to@localhost>

  | I suspect the IP_RECVDSTADDR setsockopt()

Actually, more probably IP_PKTINFO as that's the one named uses for IPv6.
Either would do for the purpose of determining the incoming address of a
UDP datagram, so the reply can be sent from the correct src addr, but
the interface identifier returned by IP_PKTINFO might be needed to make views
work (that is, even if sent to an external address, a packet received on
an internal interface is probably shown the internal view, not the external
one.)

kre