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271 lines
9.3 KiB
271 lines
9.3 KiB
#!/bin/sh |
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PATH=/usr/sbin:/usr/bin:/sbin:/bin |
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type getarg > /dev/null 2>&1 || . /lib/dracut-lib.sh |
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type ip_to_var > /dev/null 2>&1 || . /lib/net-lib.sh |
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# We already need a set netif here |
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netif=$interface |
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setup_interface() { |
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ip=$new_ip_address |
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mtu=$new_interface_mtu |
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mask=$new_subnet_mask |
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bcast=$new_broadcast_address |
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gw=${new_routers%%,*} |
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domain=$new_domain_name |
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search=$(printf -- "$new_domain_search") |
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namesrv=$new_domain_name_servers |
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hostname=$new_host_name |
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[ -n "$new_dhcp_lease_time" ] && lease_time=$new_dhcp_lease_time |
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[ -n "$new_max_life" ] && lease_time=$new_max_life |
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preferred_lft=$lease_time |
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[ -n "$new_preferred_life" ] && preferred_lft=$new_preferred_life |
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[ -f /tmp/net.$netif.override ] && . /tmp/net.$netif.override |
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# Taken from debian dhclient-script: |
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# The 576 MTU is only used for X.25 and dialup connections |
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# where the admin wants low latency. Such a low MTU can cause |
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# problems with UDP traffic, among other things. As such, |
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# disallow MTUs from 576 and below by default, so that broken |
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# MTUs are ignored, but higher stuff is allowed (1492, 1500, etc). |
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if [ -n "$mtu" ] && [ $mtu -gt 576 ]; then |
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if ! ip link set $netif mtu $mtu; then |
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ip link set $netif down |
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ip link set $netif mtu $mtu |
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linkup $netif |
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fi |
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fi |
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ip addr add $ip${mask:+/$mask} ${bcast:+broadcast $bcast} dev $netif \ |
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${lease_time:+valid_lft $lease_time} \ |
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${preferred_lft:+preferred_lft ${preferred_lft}} |
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if [ -n "$gw" ]; then |
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if [ "$mask" = "255.255.255.255" ]; then |
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# point-to-point connection => set explicit route to gateway |
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echo ip route add $gw dev $netif > /tmp/net.$netif.gw |
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fi |
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echo "$gw" | { |
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IFS=' ' read -r main_gw other_gw |
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echo ip route replace default via $main_gw dev $netif >> /tmp/net.$netif.gw |
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if [ -n "$other_gw" ]; then |
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for g in $other_gw; do |
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echo ip route add default via $g dev $netif >> /tmp/net.$netif.gw |
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done |
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fi |
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} |
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fi |
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if getargbool 1 rd.peerdns; then |
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[ -n "${search}${domain}" ] && echo "search $search $domain" > /tmp/net.$netif.resolv.conf |
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if [ -n "$namesrv" ]; then |
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for s in $namesrv; do |
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echo nameserver $s |
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done |
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fi >> /tmp/net.$netif.resolv.conf |
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fi |
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# Note: hostname can be fqdn OR short hostname, so chop off any |
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# trailing domain name and explicity add any domain if set. |
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[ -n "$hostname" ] && echo "echo ${hostname%.$domain}${domain:+.$domain} > /proc/sys/kernel/hostname" > /tmp/net.$netif.hostname |
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} |
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setup_interface6() { |
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domain=$new_domain_name |
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search=$(printf -- "$new_dhcp6_domain_search") |
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namesrv=$new_dhcp6_name_servers |
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hostname=$new_host_name |
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[ -n "$new_dhcp_lease_time" ] && lease_time=$new_dhcp_lease_time |
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[ -n "$new_max_life" ] && lease_time=$new_max_life |
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preferred_lft=$lease_time |
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[ -n "$new_preferred_life" ] && preferred_lft=$new_preferred_life |
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[ -f /tmp/net.$netif.override ] && . /tmp/net.$netif.override |
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ip -6 addr add ${new_ip6_address}/${new_ip6_prefixlen} \ |
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dev ${netif} scope global \ |
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${lease_time:+valid_lft $lease_time} \ |
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${preferred_lft:+preferred_lft ${preferred_lft}} |
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if getargbool 1 rd.peerdns; then |
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[ -n "${search}${domain}" ] && echo "search $search $domain" > /tmp/net.$netif.resolv.conf |
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if [ -n "$namesrv" ]; then |
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for s in $namesrv; do |
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echo nameserver $s |
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done |
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fi >> /tmp/net.$netif.resolv.conf |
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fi |
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# Note: hostname can be fqdn OR short hostname, so chop off any |
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# trailing domain name and explicity add any domain if set. |
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[ -n "$hostname" ] && echo "echo ${hostname%.$domain}${domain:+.$domain} > /proc/sys/kernel/hostname" > /tmp/net.$netif.hostname |
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} |
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parse_option_121() { |
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while [ $# -ne 0 ]; do |
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mask="$1" |
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shift |
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# Is the destination a multicast group? |
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if [ $1 -ge 224 -a $1 -lt 240 ]; then |
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multicast=1 |
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else |
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multicast=0 |
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fi |
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# Parse the arguments into a CIDR net/mask string |
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if [ $mask -gt 24 ]; then |
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destination="$1.$2.$3.$4/$mask" |
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shift |
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shift |
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shift |
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shift |
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elif [ $mask -gt 16 ]; then |
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destination="$1.$2.$3.0/$mask" |
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shift |
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shift |
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shift |
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elif [ $mask -gt 8 ]; then |
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destination="$1.$2.0.0/$mask" |
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shift |
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shift |
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elif [ $mask -gt 0 ]; then |
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destination="$1.0.0.0/$mask" |
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shift |
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else |
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destination="0.0.0.0/$mask" |
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fi |
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# Read the gateway |
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gateway="$1.$2.$3.$4" |
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shift |
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shift |
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shift |
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shift |
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# Multicast routing on Linux |
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# - If you set a next-hop address for a multicast group, this breaks with Cisco switches |
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# - If you simply leave it link-local and attach it to an interface, it works fine. |
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if [ $multicast -eq 1 -o "$gateway" = "0.0.0.0" ]; then |
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temp_result="$destination dev $interface" |
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else |
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temp_result="$destination via $gateway dev $interface" |
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fi |
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echo "/sbin/ip route replace $temp_result" |
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done |
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} |
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case $reason in |
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PREINIT) |
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echo "dhcp: PREINIT $netif up" |
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linkup $netif |
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;; |
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PREINIT6) |
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echo "dhcp: PREINIT6 $netif up" |
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linkup $netif |
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wait_for_ipv6_dad_link $netif |
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;; |
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BOUND) |
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echo "dhcp: BOUND setting up $netif" |
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unset layer2 |
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if [ -f /sys/class/net/$netif/device/layer2 ]; then |
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read layer2 < /sys/class/net/$netif/device/layer2 |
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fi |
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if [ "$layer2" != "0" ]; then |
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if command -v arping2 > /dev/null; then |
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if arping2 -q -C 1 -c 2 -I $netif -0 $new_ip_address; then |
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warn "Duplicate address detected for $new_ip_address while doing dhcp. retrying" |
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exit 1 |
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fi |
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else |
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if ! arping -f -q -D -c 2 -I $netif $new_ip_address; then |
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warn "Duplicate address detected for $new_ip_address while doing dhcp. retrying" |
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exit 1 |
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fi |
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fi |
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fi |
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unset layer2 |
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setup_interface |
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set | while read line || [ -n "$line" ]; do |
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[ "${line#new_}" = "$line" ] && continue |
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echo "$line" |
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done > /tmp/dhclient.$netif.dhcpopts |
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{ |
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echo '. /lib/net-lib.sh' |
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echo "setup_net $netif" |
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if [ -n "$new_classless_static_routes" ]; then |
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OLDIFS="$IFS" |
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IFS=".$IFS" |
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parse_option_121 $new_classless_static_routes |
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IFS="$OLDIFS" |
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fi |
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echo "source_hook initqueue/online $netif" |
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[ -e /tmp/net.$netif.manualup ] || echo "/sbin/netroot $netif" |
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echo "rm -f -- $hookdir/initqueue/setup_net_$netif.sh" |
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} > $hookdir/initqueue/setup_net_$netif.sh |
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echo "[ -f /tmp/net.$netif.did-setup ]" > $hookdir/initqueue/finished/dhclient-$netif.sh |
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> /tmp/net.$netif.up |
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if [ -e /sys/class/net/${netif}/address ]; then |
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> /tmp/net.$(cat /sys/class/net/${netif}/address).up |
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fi |
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;; |
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RENEW | REBIND) |
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unset lease_time |
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[ -n "$new_dhcp_lease_time" ] && lease_time=$new_dhcp_lease_time |
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[ -n "$new_max_life" ] && lease_time=$new_max_life |
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preferred_lft=$lease_time |
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[ -n "$new_preferred_life" ] && preferred_lft=$new_preferred_life |
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ip -4 addr change ${new_ip_address}/${new_subnet_mask} broadcast ${new_broadcast_address} dev ${interface} \ |
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${lease_time:+valid_lft $lease_time} ${preferred_lft:+preferred_lft ${preferred_lft}} \ |
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> /dev/null 2>&1 |
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;; |
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BOUND6) |
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echo "dhcp: BOUND6 setting up $netif" |
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setup_interface6 |
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set | while read line || [ -n "$line" ]; do |
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[ "${line#new_}" = "$line" ] && continue |
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echo "$line" |
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done > /tmp/dhclient.$netif.dhcpopts |
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{ |
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echo '. /lib/net-lib.sh' |
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echo "setup_net $netif" |
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echo "source_hook initqueue/online $netif" |
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[ -e /tmp/net.$netif.manualup ] || echo "/sbin/netroot $netif" |
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echo "rm -f -- $hookdir/initqueue/setup_net_$netif.sh" |
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} > $hookdir/initqueue/setup_net_$netif.sh |
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echo "[ -f /tmp/net.$netif.did-setup ]" > $hookdir/initqueue/finished/dhclient-$netif.sh |
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> /tmp/net.$netif.up |
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if [ -e /sys/class/net/${netif}/address ]; then |
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> /tmp/net.$(cat /sys/class/net/${netif}/address).up |
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fi |
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;; |
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RENEW6 | REBIND6) |
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unset lease_time |
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[ -n "$new_dhcp_lease_time" ] && lease_time=$new_dhcp_lease_time |
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[ -n "$new_max_life" ] && lease_time=$new_max_life |
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preferred_lft=$lease_time |
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[ -n "$new_preferred_life" ] && preferred_lft=$new_preferred_life |
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ip -6 addr change ${new_ip6_address}/${new_ip6_prefixlen} dev ${interface} scope global \ |
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${lease_time:+valid_lft $lease_time} ${preferred_lft:+preferred_lft ${preferred_lft}} \ |
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> /dev/null 2>&1 |
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;; |
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*) echo "dhcp: $reason" ;; |
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esac |
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exit 0
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