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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>
76 lines
3.6 KiB
Plaintext
76 lines
3.6 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/passt/dhcp - Check DHCP and DHCPv6 functionality in passt 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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gtools ip jq dhclient sed tr
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htools ip jq sed tr head
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set MAP_NS4 192.0.2.2
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set MAP_NS6 2001:db8:9a55::2
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test Interface name
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gout IFNAME ip -j link show | jq -rM '.[] | select(.link_type == "ether").ifname'
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hout HOST_IFNAME ip -j -4 route show|jq -rM '[.[] | select(.dst == "default").dev] | .[0]'
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hout HOST_IFNAME6 ip -j -6 route show|jq -rM '[.[] | select(.dst == "default").dev] | .[0]'
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check [ -n "__IFNAME__" ]
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test DHCP: address
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guest /sbin/dhclient -4 __IFNAME__
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gout 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 == "__HOST_IFNAME__").addr_info[0].local'
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check [ "__ADDR__" = "__HOST_ADDR__" ]
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test DHCP: route
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gout 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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gout MTU ip -j link show | jq -rM '.[] | select(.ifname == "__IFNAME__").mtu'
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check [ __MTU__ = 65520 ]
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test DHCP: DNS
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gout DNS sed -n 's/^nameserver \([0-9]*\.\)\(.*\)/\1\2/p' /etc/resolv.conf | tr '\n' ',' | sed 's/,$//;s/$/\n/'
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hout HOST_DNS sed -n 's/^nameserver \([0-9]*\.\)\(.*\)/\1\2/p' /etc/resolv.conf | head -n3 | tr '\n' ',' | sed 's/,$//;s/$/\n/'
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check [ "__DNS__" = "__HOST_DNS__" ] || ( [ "__DNS__" = "__MAP_NS4__" ] && expr "__HOST_DNS__" : "127[.]" )
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# FQDNs should be terminated by dots, but the guest DHCP client might omit them:
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# strip them first
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test DHCP: search list
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gout SEARCH sed 's/\. / /g' /etc/resolv.conf | sed 's/\.$//g' | sed -n 's/^search \(.*\)/\1/p' | tr ' \n' ',' | sed 's/,$//;s/$/\n/'
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hout HOST_SEARCH sed 's/\. / /g' /etc/resolv.conf | sed 's/\.$//g' | sed -n 's/^search \(.*\)/\1/p' | tr ' \n' ',' | sed 's/,$//;s/$/\n/'
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check [ "__SEARCH__" = "__HOST_SEARCH__" ]
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test DHCPv6: address
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guest /sbin/dhclient -6 __IFNAME__
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# Wait for DAD to complete
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guest while ip -j -6 addr show tentative | jq -e '.[].addr_info'; do sleep 0.1; done
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gout 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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gout 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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# Strip interface specifier: interface names might differ between host and guest
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test DHCPv6: DNS
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gout DNS6 sed -n 's/^nameserver \([^:]*:\)\([^%]*\).*/\1\2/p' /etc/resolv.conf | tr '\n' ',' | sed 's/,$//;s/$/\n/'
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hout HOST_DNS6 sed -n 's/^nameserver \([^:]*:\)\([^%]*\).*/\1\2/p' /etc/resolv.conf | tr '\n' ',' | sed 's/,$//;s/$/\n/'
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check [ "__DNS6__" = "__HOST_DNS6__" ] || [ "__DNS6__" = "__MAP_NS6__" -a "__HOST_DNS6__" = "::1" ]
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test DHCPv6: search list
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gout SEARCH6 sed 's/\. / /g' /etc/resolv.conf | sed 's/\.$//g' | sed -n 's/^search \(.*\)/\1/p' | tr ' \n' ',' | sed 's/,$//;s/$/\n/'
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hout HOST_SEARCH6 sed 's/\. / /g' /etc/resolv.conf | sed 's/\.$//g' | sed -n 's/^search \(.*\)/\1/p' | tr ' \n' ',' | sed 's/,$//;s/$/\n/'
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check [ "__SEARCH6__" = "__HOST_SEARCH6__" ]
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