test: Embed script for dhclient(8) in mbuto(1) profile

David reports that dhclient-script(8) on Fedora needs a number of
binaries that are not included in PROGS of the current mbuto profile,
and we would also need to include hostnamectl(1) there, which will
fail without a systemd init.

Embed a minimal script for dhclient(8) in the profile itself, written
to /sbin/dhclient-script at boot, to just check what we need to check
out of DHCP and DHCPv6 functionality.

While at it, drop busybox and logger from PROGS, as we don't need them,
and add hostname(1). While DHCP option 12 isn't supported yet by the
DHCP implementation in passt, we should probably add it soon.

Note: owing to the simplicity of this script, we now need to bring up
the interface before starting dhclient: add this in test scripts where
it's not the case yet.

Reported-by: David Gibson <david@gibson.dropbear.id.au>
Suggested-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>

note that we need to bring up the interface before starting dhclient

1 files changed, 20 insertions, 6 deletions

diff --git a/test/passt.mbuto b/test/passt.mbuto
index 150c062..968c1cd 100755
--- a/test/passt.mbuto
+++ b/test/passt.mbuto
@@ -11,7 +11,7 @@
 # Author: Stefano Brivio <sbrivio@redhat.com>
 
 PROGS="${PROGS:-ash,dash,bash ip mount ls insmod mkdir ln cat chmod lsmod
-       modprobe find grep mknod mv rm umount jq iperf3 dhclient busybox logger
+       modprobe find grep mknod mv rm umount jq iperf3 dhclient hostname
        sed tr chown sipcalc cut md5sum nc dd strace ping tail killall sleep
        sysctl nproc tcp_rr tcp_crr udp_rr which tee seq bc}"
 
@@ -22,15 +22,29 @@ LINKS="${LINKS:-
 	 ash,dash,bash		/bin/sh
 	 ash,dash,bash		/usr/bin/bash}"
 
-COPIES="${COPIES}
-	/sbin/dhclient-script"
+DIRS="${DIRS} /tmp /sbin"
 
-DIRS="${DIRS} /tmp"
+FIXUP="${FIXUP}"'
+	cat > /sbin/dhclient-script << EOF
+#!/bin/sh
+[ -n "\${new_interface_mtu}" ]       && ip link set dev \${interface} mtu \${new_interface_mtu}
+
+[ -n "\${new_ip_address}" ]          && ip addr add \${new_ip_address}/\${new_subnet_mask} dev \${interface}
+[ -n "\${new_routers}" ]             && for r in \${new_routers}; do ip route add default via \${r} dev \${interface}; done
+[ -n "\${new_domain_name_servers}" ] && for d in \${new_domain_name_servers}; do echo "nameserver \${d}" >> /etc/resolv.conf; done
+[ -n "\${new_domain_name}" ]         && (printf "search"; for d in \${new_domain_name}; do printf " %s" "\${d}"; done; printf "\n") >> /etc/resolv.conf
 
-FIXUP="${FIXUP}
+[ -n "\${new_ip6_address}" ]         && ip addr add \${new_ip6_address}/\${new_ip6_prefixlen} dev \${interface}
+[ -n "\${new_dhcp6_name_servers}" ]  && for d in \${new_dhcp6_name_servers}; do echo "nameserver \${d}%\${interface}" >> /etc/resolv.conf; done
+[ -n "\${new_dhcp6_domain_search}" ] && (printf "search"; for d in \${new_dhcp6_domain_search}; do printf " %s" "\${d}"; done; printf "\n") >> /etc/resolv.conf
+
+[ -n "\${new_host_name}" ]           && hostname "\${new_host_name}"
+exit 0
+EOF
+	chmod 755 /sbin/dhclient-script
 	:> /etc/fstab
 	sh +m
-"
+'
 
 OUTPUT="KERNEL=__KERNEL__
 INITRD=__INITRD__