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doc/demo.sh: Support IPv4-only environments too

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If no IPv6 global addresses are available, proceed with just IPv4
addresses and routes.

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
This commit is contained in:
Stefano Brivio 2021-07-17 08:27:32 +02:00
parent 90078ebc59
commit 69c8e5b598
1 changed files with 14 additions and 11 deletions
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25
doc/demo.sh
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@ -84,18 +84,21 @@ nft add chain "${ns}_nat" postrouting '{ type nat hook postrouting priority -100
nft add rule "${ns}_nat" postrouting ip saddr "${ipv4_ns}" masquerade nft add rule "${ns}_nat" postrouting ip saddr "${ipv4_ns}" masquerade
ipv6_addr="$(ipv6_devaddr "$(ipv6_dev)")" ipv6_addr="$(ipv6_devaddr "$(ipv6_dev)")"
ipv6_passt="$(ipv6_mangle "${ipv6_addr}" ${ns_idx})" if [ -n "${ipv6_addr}" ]; then
ndp_setup "${ipv6_passt}" "veth_${ns}" ipv6_passt="$(ipv6_mangle "${ipv6_addr}" ${ns_idx})"
ip -n "${ns}" addr add "${ipv6_passt}/$(ipv6_mask "${ipv6_addr}")" dev "veth_${ns}" ndp_setup "${ipv6_passt}" "veth_${ns}"
ip addr add "${ipv6_addr}" dev "veth_${ns}" ip -n "${ns}" addr add "${ipv6_passt}/$(ipv6_mask "${ipv6_addr}")" dev "veth_${ns}"
ip route add "${ipv6_passt}" dev "veth_${ns}" ip addr add "${ipv6_addr}" dev "veth_${ns}"
passt_ll="$(ipv6_ll_addr "veth_${ns}")" ip route add "${ipv6_passt}" dev "veth_${ns}"
main_ll="$(get_token "link/ether" $(ip -o li sh "veth_${ns}"))" passt_ll="$(ipv6_ll_addr "veth_${ns}")"
ip neigh add "${passt_ll%%/*}" dev "veth_${ns}" lladdr "${main_ll}" main_ll="$(get_token "link/ether" $(ip -o li sh "veth_${ns}"))"
ip -n "${ns}" route add default via "${passt_ll%%/*}" dev "veth_${ns}" ip neigh add "${passt_ll%%/*}" dev "veth_${ns}" lladdr "${main_ll}"
ip -n "${ns}" route add default via "${passt_ll%%/*}" dev "veth_${ns}"
sysctl -w net.ipv6.conf.all.forwarding=1
sysctl -w net.ipv6.conf.all.forwarding=1
else
ipv6_passt=
fi
ethtool -K "veth_${ns}" tx off ethtool -K "veth_${ns}" tx off
ip netns exec "${ns}" ethtool -K "veth_${ns}" tx off ip netns exec "${ns}" ethtool -K "veth_${ns}" tx off