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|
{ lib, makeRootfs, runCommand, writeScript, writeText
, busybox, connman, dbus, execline, iptables, iproute, jq, linux_vm, mdevd
}:
runCommand "vm-net" rec {
linux = linux_vm.override {
structuredExtraConfig = with lib.kernel; {
E1000E = yes;
IGB = yes;
PACKET = yes;
IP_NF_NAT = yes;
IP_NF_IPTABLES = yes;
IP_NF_TARGET_MASQUERADE = yes;
NF_CONNTRACK = yes;
};
};
login = writeScript "login" ''
#! ${execline}/bin/execlineb -s0
unexport !
${busybox}/bin/login -p -f root $@
'';
rootfs = makeRootfs {
rcServices.ok-all = {
type = writeText "ok-all-type" ''
bundle
'';
contents = writeText "ok-all-contents" ''
mdevd-coldplug
'';
};
rcServices.mdevd = {
type = writeText "mdevd-type" ''
longrun
'';
run = writeScript "mdevd-run" ''
#! ${execline}/bin/execlineb -P
${mdevd}/bin/mdevd -D3 -f ${writeText "mdevd.conf" ''
$INTERFACE=.* 0:0 660 ! @${writeScript "interface" ''
#! ${execline}/bin/execlineb -S0
multisubstitute {
importas -i DEVPATH DEVPATH
importas -i INTERFACE INTERFACE
}
ifte
{
# This interface is connected to another VM.
# Our IP is encoded in the NIC-specific portion of the
# interface's MAC address.
backtick -i CLIENT_IP {
pipeline { ip -j link show $INTERFACE }
pipeline { jq -r ".[0].address | split(\":\") | .[4:6] | \"0x\" + .[]" }
xargs printf "100.64.%d.%d"
}
importas -iu CLIENT_IP CLIENT_IP
if { ip address add 169.254.0.1/32 dev $INTERFACE }
if { ip link set $INTERFACE up }
ip route add $CLIENT_IP dev $INTERFACE
}
{
if { test $INTERFACE != lo }
# This is a physical connection to a network device.
if { iptables -t nat -A POSTROUTING -o $INTERFACE -j MASQUERADE }
s6-rc -u change connman
}
grep -iq ^0A:B3:EC: /sys/class/net/''${INTERFACE}/address
''}
''}
'';
notification-fd = writeText "mdevd-notification-fd" ''
3
'';
dependencies = writeText "mdevd-dependencies" ''
sysctl
'';
};
rcServices.mdevd-coldplug = {
type = writeText "mdevd-coldplug-type" ''
oneshot
'';
up = writeText "mdevd-run" ''
${mdevd}/bin/mdevd-coldplug
'';
dependencies = writeText "mdevd-coldplug-dependencies" ''
mdevd
'';
};
rcServices.dbus = {
type = writeText "dbus-daemon" ''
longrun
'';
run = writeScript "dbus-daemon-run" ''
#! ${execline}/bin/execlineb -S0
foreground { mkdir /run/dbus }
# Busybox cp doesn't have -n to avoid copying to paths that
# already exist, but we can abuse -u for the same effect,
# since every file in the store is from Jan 1 1970.
foreground { cp -u ${dbus}/libexec/dbus-daemon-launch-helper /run }
foreground { chgrp messagebus /run/dbus-daemon-launch-helper }
foreground { chmod 4550 /run/dbus-daemon-launch-helper }
${dbus}/bin/dbus-daemon
--nofork --nosyslog --nopidfile --config-file=/etc/dbus-1/system.conf
'';
};
rcServices.connman = {
type = writeText "connman-type" ''
longrun
'';
run = writeScript "connman-run" ''
#! ${execline}/bin/execlineb -S0
backtick -in HARDWARE_INTERFACES {
pipeline {
find -L /sys/class/net -mindepth 2 -maxdepth 2 -name address -print0
}
# Filter out other VMs and the loopback device.
pipeline { xargs -0 grep -iL ^\\(0A:B3:EC:\\|00:00:00:00:00:00$\\) }
# Extract the interface names from the address file paths.
awk -F/ "{if (NR > 1) printf \",\"; printf \"%s\", $5}"
}
importas -iu HARDWARE_INTERFACES HARDWARE_INTERFACES
${connman}/bin/connmand -ni $HARDWARE_INTERFACES
'';
dependencies = writeText "connman-dependencies" ''
dbus
'';
};
rcServices.sysctl = {
type = writeText "sysctl-type" ''
oneshot
'';
up = writeText "sysctl-up" ''
redirfd -w 1 /proc/sys/net/ipv4/ip_forward
echo 1
'';
};
services.getty.run = writeScript "getty-run" ''
#! ${execline}/bin/execlineb -P
${busybox}/bin/getty -i -n -l ${login} 38400 ttyS0
'';
path = [ iproute iptables jq ];
};
inherit (rootfs) squashfs;
} ''
mkdir $out
ln -s $linux/bzImage $out/kernel
ln -s $squashfs $out/squashfs
''
|