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After running dhclient -6 we expect the DHCPv6 assigned address to be immediately usable. That's true with the Fedora dhclient-script (and the upstream ISC DHCP one), however it's not true with the Debian dhclient-script. The Debian script can complete with the address still in "tentative" state, and the address won't be usable until Duplicate Address Detection (DAD) completes. That's arguably a bug in Debian (see link below), but for the time being we need to work around it anyway. We usually get away with this, because by the time we do anything where the address matters, DAD has completed. However, it's not robust, so we should explicitly wait for DAD to complete when we get an DHCPv6 address. Link: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1085231 Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
49 lines
1.9 KiB
Plaintext
49 lines
1.9 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0-or-later
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#
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# PASST - Plug A Simple Socket Transport
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# for qemu/UNIX domain socket mode
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#
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# PASTA - Pack A Subtle Tap Abstraction
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# for network namespace/tap device mode
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#
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# test/pasta/dhcp - Check DHCP and DHCPv6 functionality in pasta mode
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#
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# Copyright (c) 2021 Red Hat GmbH
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# Author: Stefano Brivio <sbrivio@redhat.com>
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nstools ip jq /sbin/dhclient
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htools ip jq
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test Interface name
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nsout IFNAME ip -j link show | jq -rM '.[] | select(.link_type == "ether").ifname'
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check [ -n "__IFNAME__" ]
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test DHCP: address
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ns /sbin/dhclient -4 --no-pid __IFNAME__
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nsout ADDR ip -j -4 addr show|jq -rM '.[] | select(.ifname == "__IFNAME__").addr_info[0].local'
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hout HOST_ADDR ip -j -4 addr show|jq -rM '.[] | select(.ifname == "__IFNAME__").addr_info[0].local'
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check [ __ADDR__ = __HOST_ADDR__ ]
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test DHCP: route
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nsout GW ip -j -4 route show|jq -rM '.[] | select(.dst == "default").gateway'
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hout HOST_GW ip -j -4 route show|jq -rM '[.[] | select(.dst == "default").gateway] | .[0]'
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check [ __GW__ = __HOST_GW__ ]
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test DHCP: MTU
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nsout MTU ip -j link show | jq -rM '.[] | select(.ifname == "__IFNAME__").mtu'
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check [ __MTU__ = 65520 ]
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test DHCPv6: address
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ns /sbin/dhclient -6 --no-pid __IFNAME__
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# Wait for DAD to complete
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ns while ip -j -6 addr show tentative | jq -e '.[].addr_info'; do sleep 0.1; done
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hout HOST_IFNAME6 ip -j -6 route show|jq -rM '[.[] | select(.dst == "default").dev] | .[0]'
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nsout ADDR6 ip -j -6 addr show|jq -rM '[.[] | select(.ifname == "__IFNAME__").addr_info[] | select(.prefixlen == 128).local] | .[0]'
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hout HOST_ADDR6 ip -j -6 addr show|jq -rM '[.[] | select(.ifname == "__HOST_IFNAME6__").addr_info[] | select(.scope == "global" and .deprecated != true).local] | .[0]'
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check [ __ADDR6__ = __HOST_ADDR6__ ]
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test DHCPv6: route
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nsout GW6 ip -j -6 route show|jq -rM '.[] | select(.dst == "default").gateway'
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hout HOST_GW6 ip -j -6 route show|jq -rM '[.[] | select(.dst == "default").gateway] | .[0]'
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check [ __GW6__ = __HOST_GW6__ ]
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