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Setting sin6_scope_id to a non-zero value will cause the check against the "empty socket address" in udp_demux() to fail, and incoming DHCPv6 responses on interfaces other than net0 will be rejected with a spurious "No UDP connection listening on port 546" error. The transmitting network device is specified via the destination address, not the source address. Fix by simply not setting sin6_scope_id on the client socket address. Reported-by: Anton D. Kachalov <mouse@yandex-team.ru> Tested-by: Anton D. Kachalov <mouse@yandex-team.ru> Signed-off-by: Michael Brown <mcb30@ipxe.org>
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