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1.38. dhcpv6

1.38.1. RHBA-2010:0196: bug fix update

Updated dhcpv6 packages that resolve several issues are now available.
The dhcpv6 packages implement the Dynamic Host Configuration Protocol (DHCP) for Internet Protocol version 6 (IPv6) networks, in accordance with RFC 3315: Dynamic Host Configuration Protocol for IPv6 (DHCPv6). DHCP is a protocol that allows individual devices on an IP network to get their own network configuration information. It consists of: dhcp6c(8), the DHCPv6 client daemon; dhcp6s(8), the DHCPv6 server daemon; and dhcp6r(8), the DHCPv6 relay agent.
These updated packages fix the following bugs:
* previously, the DHCPv6 client was not removing the address assigned to an individual interface after it disconnected. Consequently, the interface kept the same IPv6 address after reconnection. In these updated packages a new IPv6 address is assigned to an interface after disconnecting and reconnecting. (BZ#466251)
* DHCPv6 request packets created by the DHCPv6 client did not contain the "IA" sub-field, which should contain the address advertised by the server. Consequently the DHCPv6 client might have encountered issues trying to interact with other DHCPv6 servers. With this update, the DHCPv6 client now correctly inserts the "IA" field, resolving this issue. (BZ#476974)
* previously, when the DHCPv6 client received the response after sending a "Confirm" message, the client decided if it needed to apply Duplicate Address Dectection (DAD) based on the type of the identity-association (IA) construct in the response. However, the reply from the DHCPv6 server does not always contain an IA in the reply message. Consequently, when running the DHCPv6 client for a second time, the client may have triggered a segmentation fault. In these updated packages, the DHCPv6 client now checks if the reply has an IA before deciding if DAD needs to be applied, resolving this issue. (BZ#515644)
All users of dhcpv6 are advised to upgrade to these updated packages, which resolve this issue.

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