1 files changed, 69 insertions, 0 deletions
diff --git a/doc/demo.sh b/doc/demo.sh
new file mode 100755
index 0000000..3d20491
--- /dev/null
+++ b/doc/demo.sh
@@ -0,0 +1,69 @@
+#!/bin/sh -e
+#
+# SPDX-License-Identifier: AGPL-3.0-or-later
+#
+# PASST - Plug A Simple Socket Transport
+#
+# demo.sh - Set up namespaces, addresses and routes to show PASST functionality
+#
+# Copyright (c) 2020-2021 Red Hat GmbH
+# Author: Stefano Brivio <sbrivio@redhat.com>
+
+get_token() {
+	IFS=' 	'
+	__next=0
+	for __token in ${@}; do
+		[ ${__next} -eq 2 ] && echo "${__token}" && return
+		[ "${__token}" = "${1}" ] && __next=$((__next + 1))
+	done
+	unset IFS
+}
+
+ipv6_dev() { get_token "dev" $(ip -o -6 ro show default); }
+ipv6_devaddr() { get_token "inet6" $(ip -o -6 ad sh dev "${1}" scope global); }
+ipv6_ll_addr() { get_token "inet6" $(ip -o -6 ad sh dev "${1}" scope link); }
+ipv6_mask() { echo ${1#*/}; }
+ipv6_mangle() {
+	IFS=':'
+	__c=0
+	for __16b in ${1%%/*}; do
+		if [ ${__c} -lt 7 ]; then
+			printf "${__16b}:"
+		else
+			printf "abcd\n" && break
+		fi
+		__c=$((__c + 1))
+	done
+	unset IFS
+}
+
+ndp_setup() {
+	sysctl -w net.ipv6.conf.all.proxy_ndp=1
+	ip -6 neigh add proxy "${1}" dev "$(ipv6_dev)"
+}
+
+ip netns del passt 2>/dev/null || :
+ip link del veth_passt 2>/dev/null || :
+ip netns add passt
+ip link add veth_passt up netns passt type veth peer name veth_passt
+ip link set dev veth_passt up
+
+ip -n passt addr add 192.0.2.2/24 dev veth_passt
+ip addr add 192.0.2.1/24 dev veth_passt
+ip -n passt route add default via 192.0.2.1
+
+ipv6_addr="$(ipv6_devaddr "$(ipv6_dev)")"
+ipv6_passt="$(ipv6_mangle "${ipv6_addr}")"
+ndp_setup "${ipv6_passt}"
+ip -n passt addr add "${ipv6_passt}/$(ipv6_mask "${ipv6_addr}")" dev veth_passt
+ip addr add "${ipv6_addr}" dev veth_passt
+passt_ll="$(ipv6_ll_addr "veth_passt")"
+main_ll="$(get_token "link/ether" $(ip -o li sh veth_passt))"
+ip -n passt neigh add "${passt_ll%%/*}" dev veth_passt lladdr "${main_ll}"
+ip -n passt route add default via "${passt_ll%%/*}" dev veth_passt
+
+ethtool -K veth_passt tx off
+ip netns exec passt ethtool -K veth_passt tx off
+ulimit -n 300000
+
+ip netns exec passt ./passt