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[dhcpv6] Do not set sin6_scope_id on the unspecified client socket address
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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@ -924,7 +924,6 @@ int start_dhcpv6 ( struct interface *job, struct net_device *netdev,
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/* Construct client and server addresses */
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memset ( &addresses, 0, sizeof ( addresses ) );
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addresses.client.sin6.sin6_family = AF_INET6;
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addresses.client.sin6.sin6_scope_id = netdev->index;
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addresses.client.sin6.sin6_port = htons ( DHCPV6_CLIENT_PORT );
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addresses.server.sin6.sin6_family = AF_INET6;
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ipv6_all_dhcp_relay_and_servers ( &addresses.server.sin6.sin6_addr );
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