[Bug 1214385] [NEW] Stateless DHCPv6 not working in precise

[Philipp Kern]

Public bug reported:

/sbin/dhclient-script in precise's isc-dhcp-client 4.1.ESV-R4-0ubuntu5.8
contains the following snippet:

    BOUND6|RENEW6|REBIND6)
        if [ -z "${new_ip6_address}" ] || [ -z "${new_ip6_prefixlen}" ]; then
            exit_with_hooks 2
        fi

        # set leased IP
        ip -6 addr add ${new_ip6_address}/${new_ip6_prefixlen} \
            dev ${interface} scope global

This assumes that the result of the DHCPv6 transaction is an address
with a prefix, which is the case for stateful DHCPv6. For stateless
DHCPv6, however, we only get additional information that's not directly
address-related. This is fixed in saucy and reads like this:

    BOUND6|RENEW6|REBIND6)
        if [ "${new_ip6_address}" ] && [ "${new_ip6_prefixlen}" ]; then
            # set leased IP
            ip -6 addr add ${new_ip6_address}/${new_ip6_prefixlen} \
                dev ${interface} scope global
        fi

It looks like the only change from the diff to the current saucy version
we need for it to work correctly.

** Affects: isc-dhcp (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1214385

Title:
  Stateless DHCPv6 not working in precise

Status in “isc-dhcp” package in Ubuntu:
  New

Bug description:
  /sbin/dhclient-script in precise's isc-dhcp-client
  4.1.ESV-R4-0ubuntu5.8 contains the following snippet:

      BOUND6|RENEW6|REBIND6)
          if [ -z "${new_ip6_address}" ] || [ -z "${new_ip6_prefixlen}" ]; then
              exit_with_hooks 2
          fi

          # set leased IP
          ip -6 addr add ${new_ip6_address}/${new_ip6_prefixlen} \
              dev ${interface} scope global

  This assumes that the result of the DHCPv6 transaction is an address
  with a prefix, which is the case for stateful DHCPv6. For stateless
  DHCPv6, however, we only get additional information that's not
  directly address-related. This is fixed in saucy and reads like this:

      BOUND6|RENEW6|REBIND6)
          if [ "${new_ip6_address}" ] && [ "${new_ip6_prefixlen}" ]; then
              # set leased IP
              ip -6 addr add ${new_ip6_address}/${new_ip6_prefixlen} \
                  dev ${interface} scope global
          fi

  It looks like the only change from the diff to the current saucy
  version we need for it to work correctly.

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