[thirdparty/dracut.git] / modules.d / 35network-legacy / dhclient-script.sh

#!/bin/sh

PATH=/usr/sbin:/usr/bin:/sbin:/bin

type getarg >/dev/null 2>&1 || . /lib/dracut-lib.sh
type ip_to_var >/dev/null 2>&1 || . /lib/net-lib.sh

# We already need a set netif here
netif=$interface

setup_interface() {
    ip=$new_ip_address
    mtu=$new_interface_mtu
    mask=$new_subnet_mask
    bcast=$new_broadcast_address
    gw=${new_routers%%,*}
    domain=$new_domain_name
    search=$(printf -- "$new_domain_search")
    namesrv=$new_domain_name_servers
    hostname=$new_host_name
    [ -n "$new_dhcp_lease_time" ] && lease_time=$new_dhcp_lease_time
    [ -n "$new_max_life" ] && lease_time=$new_max_life
    preferred_lft=$lease_time
    [ -n "$new_preferred_life" ] && preferred_lft=$new_preferred_life

    [ -f /tmp/net.$netif.override ] && . /tmp/net.$netif.override

    # Taken from debian dhclient-script:
    # The 576 MTU is only used for X.25 and dialup connections
    # where the admin wants low latency.  Such a low MTU can cause
    # problems with UDP traffic, among other things.  As such,
    # disallow MTUs from 576 and below by default, so that broken
    # MTUs are ignored, but higher stuff is allowed (1492, 1500, etc).
    if [ -n "$mtu" ] && [ $mtu -gt 576 ] ; then
        if ! ip link set $netif mtu $mtu ; then
            ip link set $netif down
            ip link set $netif mtu $mtu
            linkup $netif
        fi
    fi

    ip addr add $ip${mask:+/$mask} ${bcast:+broadcast $bcast} dev $netif \
        ${lease_time:+valid_lft $lease_time} \
        ${preferred_lft:+preferred_lft ${preferred_lft}}

    if [ -n "$gw" ] ; then
        if [ "$mask" = "255.255.255.255" ] ; then
            # point-to-point connection => set explicit route to gateway
            echo ip route add $gw dev $netif > /tmp/net.$netif.gw
        fi

        echo "$gw" | {
            IFS=' ' read -r main_gw other_gw
            echo ip route replace default via $main_gw dev $netif >> /tmp/net.$netif.gw
            if [ -n "$other_gw" ] ; then
                for g in $other_gw; do
                    echo ip route add default via $g dev $netif >> /tmp/net.$netif.gw
                done
            fi
        }
    fi

    if getargbool 1 rd.peerdns; then
        [ -n "${search}${domain}" ] && echo "search $search $domain" > /tmp/net.$netif.resolv.conf
        if  [ -n "$namesrv" ] ; then
            for s in $namesrv; do
                echo nameserver $s
            done
        fi >> /tmp/net.$netif.resolv.conf
    fi
    # Note: hostname can be fqdn OR short hostname, so chop off any
    # trailing domain name and explicity add any domain if set.
    [ -n "$hostname" ] && echo "echo ${hostname%.$domain}${domain:+.$domain} > /proc/sys/kernel/hostname" > /tmp/net.$netif.hostname
}

setup_interface6() {
    domain=$new_domain_name
    search=$(printf -- "$new_domain_search")
    namesrv=$new_domain_name_servers
    hostname=$new_host_name
    [ -n "$new_dhcp_lease_time" ] && lease_time=$new_dhcp_lease_time
    [ -n "$new_max_life" ] && lease_time=$new_max_life
    preferred_lft=$lease_time
    [ -n "$new_preferred_life" ] && preferred_lft=$new_preferred_life

    [ -f /tmp/net.$netif.override ] && . /tmp/net.$netif.override

    ip -6 addr add ${new_ip6_address}/${new_ip6_prefixlen} \
        dev ${netif} scope global \
        ${lease_time:+valid_lft $lease_time} \
        ${preferred_lft:+preferred_lft ${preferred_lft}}

    if getargbool 1 rd.peerdns; then
        [ -n "${search}${domain}" ] && echo "search $search $domain" > /tmp/net.$netif.resolv.conf
        if  [ -n "$namesrv" ] ; then
            for s in $namesrv; do
                echo nameserver $s
            done
        fi >> /tmp/net.$netif.resolv.conf
    fi

    # Note: hostname can be fqdn OR short hostname, so chop off any
    # trailing domain name and explicity add any domain if set.
    [ -n "$hostname" ] && echo "echo ${hostname%.$domain}${domain:+.$domain} > /proc/sys/kernel/hostname" > /tmp/net.$netif.hostname
}

parse_option_121() {
    while [ $# -ne 0 ]; do
        mask="$1"
        shift

        # Is the destination a multicast group?
        if [ $1 -ge 224 -a $1 -lt 240 ]; then
            multicast=1
        else
            multicast=0
        fi

        # Parse the arguments into a CIDR net/mask string
        if [ $mask -gt 24 ]; then
            destination="$1.$2.$3.$4/$mask"
            shift; shift; shift; shift
        elif [ $mask -gt 16 ]; then
            destination="$1.$2.$3.0/$mask"
            shift; shift; shift
        elif [ $mask -gt 8 ]; then
            destination="$1.$2.0.0/$mask"
            shift; shift
        else
            destination="$1.0.0.0/$mask"
            shift
        fi

        # Read the gateway
        gateway="$1.$2.$3.$4"
        shift; shift; shift; shift

        # Multicast routing on Linux
        #  - If you set a next-hop address for a multicast group, this breaks with Cisco switches
        #  - If you simply leave it link-local and attach it to an interface, it works fine.
        if [ $multicast -eq 1 ]; then
            temp_result="$destination dev $interface"
        else
            temp_result="$destination via $gateway dev $interface"
        fi

        echo "/sbin/ip route add $temp_result"
    done
}


case $reason in
    PREINIT)
        echo "dhcp: PREINIT $netif up"
        linkup $netif
        ;;

    PREINIT6)
        echo "dhcp: PREINIT6 $netif up"
        linkup $netif
        wait_for_ipv6_dad_link $netif
        ;;

    BOUND)
        echo "dhcp: BOND setting $netif"
        unset layer2
        if [ -f /sys/class/net/$netif/device/layer2 ]; then
            read layer2 < /sys/class/net/$netif/device/layer2
        fi
        if [ "$layer2" != "0" ]; then
            if command -v arping2 >/dev/null; then
                if arping2 -q -C 1 -c 2 -I $netif -0 $new_ip_address ; then
                    warn "Duplicate address detected for $new_ip_address while doing dhcp. retrying"
                    exit 1
                fi
            else
                if ! arping -f -q -D -c 2 -I $netif $new_ip_address ; then
                    warn "Duplicate address detected for $new_ip_address while doing dhcp. retrying"
                    exit 1
                fi
            fi
        fi
        unset layer2
        setup_interface
        set | while read line || [ -n "$line" ]; do
            [ "${line#new_}" = "$line" ] && continue
            echo "$line"
        done >/tmp/dhclient.$netif.dhcpopts

        {
            echo '. /lib/net-lib.sh'
            echo "setup_net $netif"
            if [ -n "$new_classless_static_routes" ]; then
                OLDIFS="$IFS"
                IFS=".$IFS"
                parse_option_121 $new_classless_static_routes
                IFS="$OLDIFS"
            fi
            echo "source_hook initqueue/online $netif"
            [ -e /tmp/net.$netif.manualup ] || echo "/sbin/netroot $netif"
            echo "rm -f -- $hookdir/initqueue/setup_net_$netif.sh"
        } > $hookdir/initqueue/setup_net_$netif.sh

        echo "[ -f /tmp/net.$netif.did-setup ]" > $hookdir/initqueue/finished/dhclient-$netif.sh
        >/tmp/net.$netif.up
        if [ -e /sys/class/net/${netif}/address ]; then
            > /tmp/net.$(cat /sys/class/net/${netif}/address).up
        fi

        ;;

    RENEW|REBIND)
        unset lease_time
        [ -n "$new_dhcp_lease_time" ] && lease_time=$new_dhcp_lease_time
        [ -n "$new_max_life" ] && lease_time=$new_max_life
        preferred_lft=$lease_time
        [ -n "$new_preferred_life" ] && preferred_lft=$new_preferred_life
        ip -4 addr change ${new_ip_address}/${new_subnet_mask} broadcast ${new_broadcast_address} dev ${interface} \
           ${lease_time:+valid_lft $lease_time} ${preferred_lft:+preferred_lft ${preferred_lft}} \
           >/dev/null 2>&1
        ;;

    BOUND6)
        echo "dhcp: BOND6 setting $netif"
        setup_interface6

        set | while read line || [ -n "$line" ]; do
            [ "${line#new_}" = "$line" ] && continue
            echo "$line"
        done >/tmp/dhclient.$netif.dhcpopts

        {
            echo '. /lib/net-lib.sh'
            echo "setup_net $netif"
            echo "source_hook initqueue/online $netif"
            [ -e /tmp/net.$netif.manualup ] || echo "/sbin/netroot $netif"
            echo "rm -f -- $hookdir/initqueue/setup_net_$netif.sh"
        } > $hookdir/initqueue/setup_net_$netif.sh

        echo "[ -f /tmp/net.$netif.did-setup ]" > $hookdir/initqueue/finished/dhclient-$netif.sh
        >/tmp/net.$netif.up
        if [ -e /sys/class/net/${netif}/address ]; then
            > /tmp/net.$(cat /sys/class/net/${netif}/address).up
        fi
        ;;

    RENEW6|REBIND6)
        unset lease_time
        [ -n "$new_dhcp_lease_time" ] && lease_time=$new_dhcp_lease_time
        [ -n "$new_max_life" ] && lease_time=$new_max_life
        preferred_lft=$lease_time
        [ -n "$new_preferred_life" ] && preferred_lft=$new_preferred_life
        ip -6 addr change ${new_ip6_address}/${new_ip6_prefixlen} dev ${interface} scope global \
           ${lease_time:+valid_lft $lease_time} ${preferred_lft:+preferred_lft ${preferred_lft}} \
           >/dev/null 2>&1
        ;;

    *) echo "dhcp: $reason";;
esac

exit 0
Commit	Line	Data
3b403b32	1	#!/bin/sh
7e9919b9	2
a9d30a40 HH	3	PATH=/usr/sbin:/usr/bin:/sbin:/bin
	4
	5	type getarg >/dev/null 2>&1 \|\| . /lib/dracut-lib.sh
	6	type ip_to_var >/dev/null 2>&1 \|\| . /lib/net-lib.sh
	7
	8	# We already need a set netif here
	9	netif=$interface
	10
7e9919b9	11	setup_interface() {
580bb541 PS	12	ip=$new_ip_address
	13	mtu=$new_interface_mtu
	14	mask=$new_subnet_mask
	15	bcast=$new_broadcast_address
	16	gw=${new_routers%%,*}
	17	domain=$new_domain_name
b093aa2d	18	search=$(printf -- "$new_domain_search")
580bb541 PS	19	namesrv=$new_domain_name_servers
580bb541 PS	20	hostname=$new_host_name
8d09f493 HH	21	[ -n "$new_dhcp_lease_time" ] && lease_time=$new_dhcp_lease_time
	22	[ -n "$new_max_life" ] && lease_time=$new_max_life
	23	preferred_lft=$lease_time
	24	[ -n "$new_preferred_life" ] && preferred_lft=$new_preferred_life
580bb541 PS	25
	26	[ -f /tmp/net.$netif.override ] && . /tmp/net.$netif.override
	27
d1dd6bb7 PS	28	# Taken from debian dhclient-script:
	29	# The 576 MTU is only used for X.25 and dialup connections
	30	# where the admin wants low latency. Such a low MTU can cause
	31	# problems with UDP traffic, among other things. As such,
	32	# disallow MTUs from 576 and below by default, so that broken
	33	# MTUs are ignored, but higher stuff is allowed (1492, 1500, etc).
	34	if [ -n "$mtu" ] && [ $mtu -gt 576 ] ; then
c6c704fd HH	35	if ! ip link set $netif mtu $mtu ; then
	36	ip link set $netif down
	37	ip link set $netif mtu $mtu
6cb77ea9	38	linkup $netif
c6c704fd HH	39	fi
c6c704fd HH	40	fi
7e9919b9	41
0f89ec31 HH	42	ip addr add $ip${mask:+/$mask} ${bcast:+broadcast $bcast} dev $netif \
	43	${lease_time:+valid_lft $lease_time} \
	44	${preferred_lft:+preferred_lft ${preferred_lft}}
db815843	45
99ccbc30	46	if [ -n "$gw" ] ; then
78362bc5	47	if [ "$mask" = "255.255.255.255" ] ; then
99ccbc30 GE	48	# point-to-point connection => set explicit route to gateway
	49	echo ip route add $gw dev $netif > /tmp/net.$netif.gw
	50	fi
727e2a1d DS	51
	52	echo "$gw" \| {
	53	IFS=' ' read -r main_gw other_gw
	54	echo ip route replace default via $main_gw dev $netif >> /tmp/net.$netif.gw
	55	if [ -n "$other_gw" ] ; then
	56	for g in $other_gw; do
	57	echo ip route add default via $g dev $netif >> /tmp/net.$netif.gw
	58	done
	59	fi
	60	}
99ccbc30	61	fi
db815843	62
df0bdd5a HH	63	if getargbool 1 rd.peerdns; then
	64	[ -n "${search}${domain}" ] && echo "search $search $domain" > /tmp/net.$netif.resolv.conf
	65	if [ -n "$namesrv" ] ; then
	66	for s in $namesrv; do
	67	echo nameserver $s
	68	done
	69	fi >> /tmp/net.$netif.resolv.conf
	70	fi
da55af47 ID	71	# Note: hostname can be fqdn OR short hostname, so chop off any
da55af47 ID	72	# trailing domain name and explicity add any domain if set.
ffc68f35	73	[ -n "$hostname" ] && echo "echo ${hostname%.$domain}${domain:+.$domain} > /proc/sys/kernel/hostname" > /tmp/net.$netif.hostname
7e9919b9 DD	74	}
7e9919b9 DD	75
2ac599dc HH	76	setup_interface6() {
	77	domain=$new_domain_name
	78	search=$(printf -- "$new_domain_search")
	79	namesrv=$new_domain_name_servers
	80	hostname=$new_host_name
ebe74116 HH	81	[ -n "$new_dhcp_lease_time" ] && lease_time=$new_dhcp_lease_time
	82	[ -n "$new_max_life" ] && lease_time=$new_max_life
	83	preferred_lft=$lease_time
	84	[ -n "$new_preferred_life" ] && preferred_lft=$new_preferred_life
2ac599dc HH	85
	86	[ -f /tmp/net.$netif.override ] && . /tmp/net.$netif.override
	87
	88	ip -6 addr add ${new_ip6_address}/${new_ip6_prefixlen} \
ebe74116 HH	89	dev ${netif} scope global \
	90	${lease_time:+valid_lft $lease_time} \
	91	${preferred_lft:+preferred_lft ${preferred_lft}}
2ac599dc	92
df0bdd5a HH	93	if getargbool 1 rd.peerdns; then
	94	[ -n "${search}${domain}" ] && echo "search $search $domain" > /tmp/net.$netif.resolv.conf
	95	if [ -n "$namesrv" ] ; then
	96	for s in $namesrv; do
	97	echo nameserver $s
	98	done
	99	fi >> /tmp/net.$netif.resolv.conf
	100	fi
2ac599dc HH	101
	102	# Note: hostname can be fqdn OR short hostname, so chop off any
	103	# trailing domain name and explicity add any domain if set.
	104	[ -n "$hostname" ] && echo "echo ${hostname%.$domain}${domain:+.$domain} > /proc/sys/kernel/hostname" > /tmp/net.$netif.hostname
	105	}
	106
bcabe0fe	107	parse_option_121() {
caf12d67 HH	108	while [ $# -ne 0 ]; do
	109	mask="$1"
	110	shift
	111
	112	# Is the destination a multicast group?
	113	if [ $1 -ge 224 -a $1 -lt 240 ]; then
	114	multicast=1
	115	else
	116	multicast=0
	117	fi
	118
	119	# Parse the arguments into a CIDR net/mask string
	120	if [ $mask -gt 24 ]; then
	121	destination="$1.$2.$3.$4/$mask"
	122	shift; shift; shift; shift
	123	elif [ $mask -gt 16 ]; then
	124	destination="$1.$2.$3.0/$mask"
	125	shift; shift; shift
	126	elif [ $mask -gt 8 ]; then
	127	destination="$1.$2.0.0/$mask"
	128	shift; shift
	129	else
	130	destination="$1.0.0.0/$mask"
	131	shift
	132	fi
	133
	134	# Read the gateway
	135	gateway="$1.$2.$3.$4"
	136	shift; shift; shift; shift
	137
	138	# Multicast routing on Linux
	139	# - If you set a next-hop address for a multicast group, this breaks with Cisco switches
	140	# - If you simply leave it link-local and attach it to an interface, it works fine.
	141	if [ $multicast -eq 1 ]; then
	142	temp_result="$destination dev $interface"
	143	else
	144	temp_result="$destination via $gateway dev $interface"
	145	fi
	146
	147	echo "/sbin/ip route add $temp_result"
	148	done
	149	}
	150
	151
7e9919b9 DD	152	case $reason in
7e9919b9 DD	153	PREINIT)
cc02093d	154	echo "dhcp: PREINIT $netif up"
6cb77ea9	155	linkup $netif
cc02093d	156	;;
2ac599dc	157
a9d30a40	158	PREINIT6)
7c5ec0f5	159	echo "dhcp: PREINIT6 $netif up"
a9d30a40	160	linkup $netif
811a070d	161	wait_for_ipv6_dad_link $netif
a9d30a40 HH	162	;;
a9d30a40 HH	163
7e9919b9	164	BOUND)
cc02093d	165	echo "dhcp: BOND setting $netif"
8b88dc7f HH	166	unset layer2
	167	if [ -f /sys/class/net/$netif/device/layer2 ]; then
	168	read layer2 < /sys/class/net/$netif/device/layer2
cc02093d	169	fi
8b88dc7f	170	if [ "$layer2" != "0" ]; then
9853791d	171	if command -v arping2 >/dev/null; then
00ca15ab	172	if arping2 -q -C 1 -c 2 -I $netif -0 $new_ip_address ; then
9853791d HH	173	warn "Duplicate address detected for $new_ip_address while doing dhcp. retrying"
	174	exit 1
	175	fi
	176	else
	177	if ! arping -f -q -D -c 2 -I $netif $new_ip_address ; then
	178	warn "Duplicate address detected for $new_ip_address while doing dhcp. retrying"
	179	exit 1
	180	fi
8b88dc7f HH	181	fi
	182	fi
	183	unset layer2
3b403b32	184	setup_interface
6d58fa27	185	set \| while read line \|\| [ -n "$line" ]; do
cc02093d	186	[ "${line#new_}" = "$line" ] && continue
3b403b32	187	echo "$line"
cc02093d	188	done >/tmp/dhclient.$netif.dhcpopts
957bc5c9	189
c6c704fd HH	190	{
	191	echo '. /lib/net-lib.sh'
	192	echo "setup_net $netif"
caf12d67	193	if [ -n "$new_classless_static_routes" ]; then
337a55eb LN	194	OLDIFS="$IFS"
337a55eb LN	195	IFS=".$IFS"
cf9a4e0c	196	parse_option_121 $new_classless_static_routes
337a55eb	197	IFS="$OLDIFS"
caf12d67	198	fi
c6c704fd HH	199	echo "source_hook initqueue/online $netif"
c6c704fd HH	200	[ -e /tmp/net.$netif.manualup ] \|\| echo "/sbin/netroot $netif"
32bd2fbb	201	echo "rm -f -- $hookdir/initqueue/setup_net_$netif.sh"
c6c704fd HH	202	} > $hookdir/initqueue/setup_net_$netif.sh
c6c704fd HH	203
43a85a73	204	echo "[ -f /tmp/net.$netif.did-setup ]" > $hookdir/initqueue/finished/dhclient-$netif.sh
2ac599dc	205	>/tmp/net.$netif.up
26fbe97b HH	206	if [ -e /sys/class/net/${netif}/address ]; then
	207	> /tmp/net.$(cat /sys/class/net/${netif}/address).up
	208	fi
	209
2ac599dc HH	210	;;
2ac599dc HH	211
cf627b20 HH	212	RENEW\|REBIND)
	213	unset lease_time
	214	[ -n "$new_dhcp_lease_time" ] && lease_time=$new_dhcp_lease_time
	215	[ -n "$new_max_life" ] && lease_time=$new_max_life
	216	preferred_lft=$lease_time
	217	[ -n "$new_preferred_life" ] && preferred_lft=$new_preferred_life
e847a78b	218	ip -4 addr change ${new_ip_address}/${new_subnet_mask} broadcast ${new_broadcast_address} dev ${interface} \
cf627b20 HH	219	${lease_time:+valid_lft $lease_time} ${preferred_lft:+preferred_lft ${preferred_lft}} \
	220	>/dev/null 2>&1
	221	;;
	222
2ac599dc HH	223	BOUND6)
	224	echo "dhcp: BOND6 setting $netif"
	225	setup_interface6
	226
6d58fa27	227	set \| while read line \|\| [ -n "$line" ]; do
2ac599dc HH	228	[ "${line#new_}" = "$line" ] && continue
	229	echo "$line"
	230	done >/tmp/dhclient.$netif.dhcpopts
	231
	232	{
	233	echo '. /lib/net-lib.sh'
	234	echo "setup_net $netif"
	235	echo "source_hook initqueue/online $netif"
	236	[ -e /tmp/net.$netif.manualup ] \|\| echo "/sbin/netroot $netif"
2ac599dc HH	237	echo "rm -f -- $hookdir/initqueue/setup_net_$netif.sh"
	238	} > $hookdir/initqueue/setup_net_$netif.sh
	239
43a85a73	240	echo "[ -f /tmp/net.$netif.did-setup ]" > $hookdir/initqueue/finished/dhclient-$netif.sh
c6c704fd	241	>/tmp/net.$netif.up
26fbe97b HH	242	if [ -e /sys/class/net/${netif}/address ]; then
	243	> /tmp/net.$(cat /sys/class/net/${netif}/address).up
	244	fi
cc02093d	245	;;
cf627b20 HH	246
	247	RENEW6\|REBIND6)
	248	unset lease_time
	249	[ -n "$new_dhcp_lease_time" ] && lease_time=$new_dhcp_lease_time
	250	[ -n "$new_max_life" ] && lease_time=$new_max_life
	251	preferred_lft=$lease_time
	252	[ -n "$new_preferred_life" ] && preferred_lft=$new_preferred_life
	253	ip -6 addr change ${new_ip6_address}/${new_ip6_prefixlen} dev ${interface} scope global \
	254	${lease_time:+valid_lft $lease_time} ${preferred_lft:+preferred_lft ${preferred_lft}} \
	255	>/dev/null 2>&1
	256	;;
	257
9ab14265	258	*) echo "dhcp: $reason";;
0ac9584d	259	esac
7e9919b9	260
7e9919b9	261	exit 0