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#!/bin/sh
#
# Format:
# ip=[dhcp|on|any|single-dhcp]
#
# ip=<interface>:[dhcp|on|any][:[<mtu>][:<macaddr>]]
#
# ip=<client-IP-number>:<server-IP-number>:<gateway-IP-number>:<netmask>:<client-hostname>:<interface>:{dhcp|on|any|none|off}[:[<mtu>][:<macaddr>]]
#
# When supplying more than only ip= line, <interface> is mandatory and
# bootdev= must contain the name of the primary interface to use for
# routing,dns,dhcp-options,etc.
#
# we really need to use `expr substr` with dash
# shellcheck disable=SC2003 disable=SC2308
command -v getarg > /dev/null || . /lib/dracut-lib.sh
if [ -n "$netroot" ] && [ -z "$(getarg ip=)" ] && [ -z "$(getarg BOOTIF=)" ]; then
# No ip= argument(s) for netroot provided, defaulting to DHCP
return
fi
# Count ip= lines to decide whether we need bootdev= or not
if [ -z "$NEEDBOOTDEV" ]; then
count=0
for p in $(getargs ip=); do
case "$p" in
ibft)
continue
;;
esac
count=$((count + 1))
done
[ $count -gt 1 ] && NEEDBOOTDEV=1
fi
unset count
# If needed, check if bootdev= contains anything usable
BOOTDEV=$(getarg bootdev=)
if [ -n "$NEEDBOOTDEV" ] && getargbool 1 rd.neednet; then
#[ -z "$BOOTDEV" ] && warn "Please supply bootdev argument for multiple ip= lines"
echo "rd.neednet=1" > /etc/cmdline.d/dracut-neednet.conf
info "Multiple ip= arguments: assuming rd.neednet=1"
else
unset NEEDBOOTDEV
fi
# Check ip= lines
# XXX Would be nice if we could errorcheck ip addresses here as well
for p in $(getargs ip=); do
ip_to_var "$p"
# make first device specified the BOOTDEV
if [ -n "$NEEDBOOTDEV" ] && [ -z "$BOOTDEV" ] && [ -n "$dev" ]; then
BOOTDEV="$dev"
info "Setting bootdev to '$BOOTDEV'"
fi
# skip ibft since we did it above
[ "$autoconf" = "ibft" ] && continue
# Empty autoconf defaults to 'dhcp'
if [ -z "$autoconf" ]; then
warn "Empty autoconf values default to dhcp"
autoconf="dhcp"
fi
# Error checking for autoconf in combination with other values
for autoopt in $(str_replace "$autoconf" "," " "); do
case $autoopt in
error) die "Error parsing option 'ip=$p'" ;;
bootp | rarp | both) die "Sorry, ip=$autoopt is currently unsupported" ;;
none | off)
[ -z "$ip" ] \
&& die "For argument 'ip=$p'\nValue '$autoopt' without static configuration does not make sense"
[ -z "$mask" ] \
&& die "Sorry, automatic calculation of netmask is not yet supported"
;;
auto6 | link6) ;;
either6) ;;
dhcp | dhcp6 | on | any | single-dhcp)
[ -n "$NEEDBOOTDEV" ] && [ -z "$dev" ] \
&& die "Sorry, 'ip=$p' does not make sense for multiple interface configurations"
[ -n "$ip" ] \
&& die "For argument 'ip=$p'\nSorry, setting client-ip does not make sense for '$autoopt'"
;;
*) die "For argument 'ip=$p'\nSorry, unknown value '$autoopt'" ;;
esac
done
if [ -n "$dev" ]; then
# We don't like duplicate device configs
if [ -n "$IFACES" ]; then
for i in $IFACES; do
[ "$dev" = "$i" ] && die "For argument 'ip=$p'\nDuplication configurations for '$dev'"
done
fi
# IFACES list for later use
IFACES="$IFACES $dev"
# Interface should exist
if [ ! -e "/sys/class/net/$dev" ]; then
warn "Network interface '$dev' does not exist"
fi
fi
# Do we need to check for specific options?
if [ -n "$NEEDDHCP" ] || [ -n "$DHCPORSERVER" ]; then
# Correct device? (Empty is ok as well)
[ "$dev" = "$BOOTDEV" ] || continue
# Server-ip is there?
[ -n "$DHCPORSERVER" ] && [ -n "$srv" ] && continue
# dhcp? (It's simpler to check for a set ip. Checks above ensure that if
# ip is there, we're static
[ -z "$ip" ] && continue
# Not good!
die "Server-ip or dhcp for netboot needed, but current arguments say otherwise"
fi
if str_starts "$dev" "enx" && [ ${#dev} -eq 15 ]; then
# shellcheck disable=SC2003
printf -- "ifname=%s:%s:%s:%s:%s:%s:%s\n" \
"$dev" \
"$(expr substr "$dev" 3 2)" \
"$(expr substr "$dev" 5 2)" \
"$(expr substr "$dev" 7 2)" \
"$(expr substr "$dev" 9 2)" \
"$(expr substr "$dev" 11 2)" \
"$(expr substr "$dev" 13 2)" \
>> /etc/cmdline.d/80-enx.conf
fi
done
# put BOOTIF in IFACES to make sure it comes up
if getargbool 1 "rd.bootif" && BOOTIF="$(getarg BOOTIF=)"; then
BOOTDEV=$(fix_bootif "$BOOTIF")
IFACES="$BOOTDEV $IFACES"
fi
# This ensures that BOOTDEV is always first in IFACES
if [ -n "$BOOTDEV" ] && [ -n "$IFACES" ]; then
IFACES="${IFACES%"$BOOTDEV"*} ${IFACES#*"$BOOTDEV"}"
IFACES="$BOOTDEV $IFACES"
fi
# Store BOOTDEV and IFACES for later use
[ -n "$BOOTDEV" ] && echo "$BOOTDEV" > /tmp/net.bootdev
[ -n "$IFACES" ] && echo "$IFACES" > /tmp/net.ifaces
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