# SPDX-License-Identifier: GPL-2.0-or-later
#
# PASST - Plug A Simple Socket Transport
#  for qemu/UNIX domain socket mode
#
# PASTA - Pack A Subtle Tap Abstraction
#  for network namespace/tap device mode
#
# test/demo/passt - Quick introduction to passt
#
# Copyright (c) 2021 Red Hat GmbH
# Author: Stefano Brivio <sbrivio@redhat.com>

say	This is a short introduction to 
em	passt
say	.
nl
nl
sleep	3

say	Let's fetch the source
sleep	1
host	cd __STATEDIR__
host	git clone git://passt.top/passt
sleep	1

say	 and build it.
sleep	1
host	cd passt
host	make
sleep	1

nl
nl
say	A quick look at the man page...
sleep	1
hostb	man ./passt.1
sleep	5
hostb	/ports
sleep	2
hostb	n
sleep	2
hostb	n
sleep	10

nl
say	  '-t' to forward TCP ports.
sleep	3
host	q

nl
nl
say	Let's create a small initramfs image for the guest.
guest	cd __STATEDIR__
guest	git clone git://mbuto.sh/mbuto
guest	./mbuto/mbuto -f passt.img -p passt/test/passt.mbuto -c lz4
sleep	2

nl
nl
say	We want to isolate passt and guest in a
nl
say	  network namespace. For convenience, we'll
nl
say	  create it with 'pasta', see also the
nl
say	  'pasta' demo above.
sleep	3

passt	cd __STATEDIR__/passt
passtb	./pasta -P pasta.pid
sleep	3
passt	/sbin/dhclient -4 --no-pid
sleep	2
passt	/sbin/dhclient -6 --no-pid
sleep	2

nl
nl
say	Now let's run 'passt' in the new namespace, and
nl
say	  enter this namespace from the guest terminal too.
sleep	3
guest	cd passt
gout	TARGET_PID pgrep -P $(cat pasta.pid)
sleep	1

passtb	./passt -f -t 10001,10003 -s __STATEDIR__/passt.socket
sleep	2

guest	nsenter -t __TARGET_PID__ -U -n --preserve-credentials
sleep	5

nl
nl
say	We're ready to start qemu
nl
sleep	2
hout	VMLINUZ echo "/boot/vmlinuz-$(uname -r)"
guest	qemu-system-x86_64 -enable-kvm -m 4096 -cpu host -smp 4 -kernel __VMLINUZ__ -initrd ../passt.img -nographic -serial stdio -nodefaults -append "console=ttyS0" -device virtio-net-pci,netdev=s0 -netdev stream,id=s0,server=off,addr.type=unix,addr.path=__STATEDIR__/passt.socket
sleep	10

nl
nl
guest	ip link show
sleep	3
say	Guest is up. Let's configure IPv4 first...
sleep	2
guest	ip link set dev eth0 up
sleep	2
guest	dhclient -4
sleep	2
guest	ip addr show
sleep	5

nl
say	  SLAAC is already done, but we can also
nl
say	  get another address via DHCPv6.
sleep	3
guest	dhclient -6
sleep	3

nl
nl
say	Let's try to communicate between host and guest.
sleep	2
guestb	socat TCP6-LISTEN:10001 STDIO
sleep	2
host	echo "Hello from the host" | socat -u STDIN TCP6:[::1]:10001
sleep	5

nl
nl
say	Now the other way around... using
nl
say	   the address of the default gateway.
sleep	2
gout	GW ip -j -4 route show|jq -rM '.[] | select(.dst == "default").gateway'
sleep	5
hostb	socat TCP4-LISTEN:31337 STDIO
sleep	2
guest	echo "Hello from the guest" | socat -u STDIN TCP4:__GW__:31337
sleep	3

nl
nl
say	Let's have a (quick!) look at performance
nl
say	  more in the "Performance" section below.
sleep	3

host	nsenter -t __TARGET_PID__ -U -n --preserve-credentials

guest	/sbin/sysctl -w net.core.rmem_max=536870912
guest	/sbin/sysctl -w net.core.wmem_max=536870912
guest	/sbin/sysctl -w net.core.rmem_default=33554432
guest	/sbin/sysctl -w net.core.wmem_default=33554432
guest	/sbin/sysctl -w net.ipv4.tcp_rmem="4096 131072 268435456"
guest	/sbin/sysctl -w net.ipv4.tcp_wmem="4096 131072 268435456"
guest	/sbin/sysctl -w net.ipv4.tcp_timestamps=0

host	sysctl -w net.ipv4.tcp_rmem="4096 524288 134217728"
host	sysctl -w net.ipv4.tcp_wmem="4096 524288 134217728"
host	sysctl -w net.ipv4.tcp_timestamps=0

gout	GW6 ip -j -6 route show|jq -rM '.[] | select(.dst == "default").gateway'
gout	IFNAME ip -j link show | jq -rM '.[] | select(.link_type == "ether").ifname'
nl
nl
info	Throughput in Gbps, latency in µs
th	flow host>guest guest>host

set	OPTS -P4 -w 64M -l 1M -i1 --pacing-timer 100000

tr	TCP/IPv6 throughput
hostb	sleep 10; iperf3 -c ::1 -p 10001 __OPTS__
gout	BW iperf3 -s1J -p 10001 | jq -rM ".end.sum_received.bits_per_second"
bw	__BW__ 2.0 3.0
sleep	5
guestb	sleep 10; iperf3 -c __GW6__%__IFNAME__ -p 10002 __OPTS__ -O3
hout	BW iperf3 -s1J -p 10002 | jq -rM ".end.sum_received.bits_per_second"
bw	__BW__ 2.0 3.0

tl	TCP/IPv6 RR latency
guestb	tcp_rr -C 10001 -P 10003 -6 --nolog
sleep	2
hout	LAT tcp_rr -C 10001 -P 10003 --nolog -c -H ::1 | sed -n 's/^throughput=\(.*\)/\1/p'
lat	__LAT__ 1000 800
sleep	2
hostb	tcp_rr -6 --nolog
sleep	2
gout	LAT tcp_rr --nolog -c -H __GW6__%__IFNAME__ | sed -n 's/^throughput=\(.*\)/\1/p'
lat	__LAT__ 1000 800
sleep	2

tl	TCP/IPv6 CRR latency
guestb	tcp_crr -C 10001 -P 10003 -6 --nolog
sleep	2
hout	LAT tcp_crr -C 10001 -P 10003 --nolog -c -H ::1 | sed -n 's/^throughput=\(.*\)/\1/p'
lat	__LAT__ 1000 800
sleep	2
hostb	tcp_crr -6 --nolog
sleep	2
gout	LAT tcp_crr --nolog -c -H __GW6__%__IFNAME__ | sed -n 's/^throughput=\(.*\)/\1/p'
lat	__LAT__ 1000 800
sleep	2

tr	TCP/IPv4 throughput
hostb	sleep 10; iperf3 -c 127.0.0.1 -p 10001 __OPTS__
gout	BW iperf3 -p 10001 -s1J | jq -rM ".end.sum_received.bits_per_second"
bw	__BW__ 2.0 3.0
sleep	5
guestb	sleep 10; iperf3 -c __GW__ -p 10002 __OPTS__ -O3
hout	BW iperf3 -s1J -p 10002 | jq -rM ".end.sum_received.bits_per_second"
bw	__BW__ 2.0 3.0

tl	TCP/IPv4 RR latency
guestb	tcp_rr -C 10001 -P 10003 -4 --nolog
sleep	2
hout	LAT tcp_rr -C 10001 -P 10003 --nolog -c -H 127.0.0.1 | sed -n 's/^throughput=\(.*\)/\1/p'
lat	__LAT__ 1000 800
sleep	2
hostb	tcp_rr -4 --nolog
sleep	2
gout	LAT tcp_rr --nolog -c -H __GW__ | sed -n 's/^throughput=\(.*\)/\1/p'
lat	__LAT__ 1000 800
sleep	2

tl	TCP/IPv4 CRR latency
guestb	tcp_crr -C 10001 -P 10003 -4 --nolog
sleep	2
hout	LAT tcp_crr -C 10001 -P 10003 --nolog -c -H 127.0.0.1 | sed -n 's/^throughput=\(.*\)/\1/p'
lat	__LAT__ 1000 800
sleep	2
hostb	tcp_crr -4 --nolog
sleep	2
gout	LAT tcp_crr --nolog -c -H __GW__ | sed -n 's/^throughput=\(.*\)/\1/p'
lat	__LAT__ 1000 800
sleep	2

nl
nl
say	Thanks for watching!
sleep	5