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# 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/passt/dhcp - Check DHCP and DHCPv6 functionality in passt mode
#
# Copyright (c) 2021 Red Hat GmbH
# Author: Stefano Brivio <sbrivio@redhat.com>

gtools	ip jq dhclient sed tr
htools	ip jq sed tr head

test	Interface name
gout	IFNAME ip -j link show | jq -rM '.[] | select(.link_type == "ether").ifname'
hout	HOST_IFNAME ip -j -4 route show|jq -rM '[.[] | select(.dst == "default").dev] | .[0]'
hout	HOST_IFNAME6 ip -j -6 route show|jq -rM '[.[] | select(.dst == "default").dev] | .[0]'
check	[ -n "__IFNAME__" ]

test	DHCP: address
guest	/sbin/dhclient -4 __IFNAME__
gout	ADDR ip -j -4 addr show|jq -rM '[.[] | select(.ifname == "__IFNAME__").addr_info[0].local] | .[0]'
hout	HOST_ADDR ip -j -4 addr show|jq -rM '[.[] | select(.ifname == "__HOST_IFNAME__").addr_info[0].local] | .[0]'
check	[ "__ADDR__" = "__HOST_ADDR__" ]

test	DHCP: route
gout	GW ip -j -4 route show|jq -rM '.[] | select(.dst == "default").gateway'
hout	HOST_GW ip -j -4 route show|jq -rM '[.[] | select(.dst == "default").gateway] | .[0]'
check	[ "__GW__" = "__HOST_GW__" ]

test	DHCP: MTU
gout	MTU ip -j link show | jq -rM '.[] | select(.ifname == "__IFNAME__").mtu'
check	[ __MTU__ = 65520 ]

test	DHCP: DNS
gout	DNS sed -n 's/^nameserver \([0-9]*\.\)\(.*\)/\1\2/p' /etc/resolv.conf | tr '\n' ',' | sed 's/,$//;s/$/\n/'
hout	HOST_DNS sed -n 's/^nameserver \([0-9]*\.\)\(.*\)/\1\2/p' /etc/resolv.conf | head -n3 | tr '\n' ',' | sed 's/,$//;s/$/\n/'
check	[ "__DNS__" = "__HOST_DNS__" ] || [ "__DNS__" = "__HOST_GW__" -a "__HOST_DNS__" = "127.0.0.1" ]

# FQDNs should be terminated by dots, but the guest DHCP client might omit them:
# strip them first
test	DHCP: search list
gout	SEARCH sed 's/\. / /g' /etc/resolv.conf | sed 's/\.$//g' | sed -n 's/^search \(.*\)/\1/p' | tr ' \n' ',' | sed 's/,$//;s/$/\n/'
hout	HOST_SEARCH sed 's/\. / /g' /etc/resolv.conf | sed 's/\.$//g' | sed -n 's/^search \(.*\)/\1/p' | tr ' \n' ',' | sed 's/,$//;s/$/\n/'
check	[ "__SEARCH__" = "__HOST_SEARCH__" ]

test	DHCPv6: address
guest	/sbin/dhclient -6 __IFNAME__
gout	ADDR6 ip -j -6 addr show|jq -rM '[.[] | select(.ifname == "__IFNAME__").addr_info[] | select(.prefixlen == 128).local] | .[0]'
hout	HOST_ADDR6 ip -j -6 addr show|jq -rM '[.[] | select(.ifname == "__HOST_IFNAME6__").addr_info[] | select(.scope == "global").local] | .[0]'
check	[ "__ADDR6__" = "__HOST_ADDR6__" ]

test	DHCPv6: route
gout	GW6 ip -j -6 route show|jq -rM '.[] | select(.dst == "default").gateway'
hout	HOST_GW6 ip -j -6 route show|jq -rM '[.[] | select(.dst == "default").gateway] | .[0]'
check	[ "__GW6__" = "__HOST_GW6__" ]

# Strip interface specifier: interface names might differ between host and guest
test	DHCPv6: DNS
gout	DNS6 sed -n 's/^nameserver \([^:]*:\)\([^%]*\).*/\1\2/p' /etc/resolv.conf | tr '\n' ',' | sed 's/,$//;s/$/\n/'
hout	HOST_DNS6 sed -n 's/^nameserver \([^:]*:\)\([^%]*\).*/\1\2/p' /etc/resolv.conf | tr '\n' ',' | sed 's/,$//;s/$/\n/'
check	[ "__DNS6__" = "__HOST_DNS6__" ] || [ "__DNS6__" = "__HOST_GW6__" -a "__HOST_DNS6__" = "::1" ]

test	DHCPv6: search list
gout	SEARCH6 sed 's/\. / /g' /etc/resolv.conf | sed 's/\.$//g' | sed -n 's/^search \(.*\)/\1/p' | tr ' \n' ',' | sed 's/,$//;s/$/\n/'
hout	HOST_SEARCH6 sed 's/\. / /g' /etc/resolv.conf | sed 's/\.$//g' | sed -n 's/^search \(.*\)/\1/p' | tr ' \n' ',' | sed 's/,$//;s/$/\n/'
check	[ "__SEARCH6__" = "__HOST_SEARCH6__" ]

debug log:

solving b428064 ...
found b428064 in https://archives.passt.top/passt-dev/20231208174932.3390897-1-sbrivio@redhat.com/
found 7272755 in https://passt.top/passt
preparing index
index prepared:
100644 72727558a511e224dc6e81b861b6f06251d1874d	test/passt/dhcp

applying [1/1] https://archives.passt.top/passt-dev/20231208174932.3390897-1-sbrivio@redhat.com/
diff --git a/test/passt/dhcp b/test/passt/dhcp
index 7272755..b428064 100644

Checking patch test/passt/dhcp...
Applied patch test/passt/dhcp cleanly.

index at:
100644 b428064773b5bc67613cea6dfd5ca5f862f3efde	test/passt/dhcp

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