3bb366d152
Otherwise, connections to the local host (which becomes the guest, actually) will fail. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
82 lines
2.3 KiB
Bash
Executable file
82 lines
2.3 KiB
Bash
Executable file
#!/bin/sh -e
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#
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# SPDX-License-Identifier: AGPL-3.0-or-later
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#
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# PASST - Plug A Simple Socket Transport
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#
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# demo.sh - Set up namespaces, addresses and routes to show PASST functionality
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#
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# Copyright (c) 2020-2021 Red Hat GmbH
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# Author: Stefano Brivio <sbrivio@redhat.com>
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get_token() {
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IFS=' '
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__next=0
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for __token in ${@}; do
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[ ${__next} -eq 2 ] && echo "${__token}" && return
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[ "${__token}" = "${1}" ] && __next=$((__next + 1))
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done
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unset IFS
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}
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ipv6_dev() { get_token "dev" $(ip -o -6 ro show default); }
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ipv6_devaddr() { get_token "inet6" $(ip -o -6 ad sh dev "${1}" scope global); }
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ipv6_ll_addr() { get_token "inet6" $(ip -o -6 ad sh dev "${1}" scope link); }
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ipv6_mask() { echo ${1#*/}; }
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ipv6_mangle() {
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IFS=':'
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__c=0
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for __16b in ${1%%/*}; do
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if [ ${__c} -lt 7 ]; then
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printf "${__16b}:"
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else
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printf "abcd\n" && break
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fi
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__c=$((__c + 1))
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done
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unset IFS
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}
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ndp_setup() {
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sysctl -w net.ipv6.conf.all.proxy_ndp=1
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ip -6 neigh add proxy "${1}" dev "$(ipv6_dev)"
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}
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ip netns del passt 2>/dev/null || :
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ip link del veth_passt 2>/dev/null || :
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ip netns add passt
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ip link add veth_passt up netns passt type veth peer name veth_passt
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ip link set dev veth_passt up
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ip -n passt link set dev lo up
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ip -n passt addr add 192.0.2.2/24 dev veth_passt
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ip addr add 192.0.2.1/24 dev veth_passt
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ip -n passt route add default via 192.0.2.1
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sysctl -w net.ipv4.ip_forward=1
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nft delete table passt_nat 2>/dev/null || :
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nft add table passt_nat
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nft 'add chain passt_nat postrouting { type nat hook postrouting priority -100 ; }'
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nft add rule passt_nat postrouting ip saddr 192.0.2.2 masquerade
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ipv6_addr="$(ipv6_devaddr "$(ipv6_dev)")"
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ipv6_passt="$(ipv6_mangle "${ipv6_addr}")"
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ndp_setup "${ipv6_passt}"
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ip -n passt addr add "${ipv6_passt}/$(ipv6_mask "${ipv6_addr}")" dev veth_passt
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ip addr add "${ipv6_addr}" dev veth_passt
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ip route add "${ipv6_passt}" dev veth_passt
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passt_ll="$(ipv6_ll_addr "veth_passt")"
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main_ll="$(get_token "link/ether" $(ip -o li sh veth_passt))"
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ip neigh add "${passt_ll%%/*}" dev veth_passt lladdr "${main_ll}"
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ip -n passt route add default via "${passt_ll%%/*}" dev veth_passt
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sysctl -w net.ipv6.conf.all.forwarding=1
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ethtool -K veth_passt tx off
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ip netns exec passt ethtool -K veth_passt tx off
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ip netns exec passt sysctl -w net.ipv4.ping_group_range="0 2147483647"
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ip netns exec passt ./passt
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