diff options
Diffstat (limited to 'core/rootfs/rootfs-stage31/data/inc/udhcpc-trigger')
| -rwxr-xr-x | core/rootfs/rootfs-stage31/data/inc/udhcpc-trigger | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/core/rootfs/rootfs-stage31/data/inc/udhcpc-trigger b/core/rootfs/rootfs-stage31/data/inc/udhcpc-trigger new file mode 100755 index 00000000..02987f21 --- /dev/null +++ b/core/rootfs/rootfs-stage31/data/inc/udhcpc-trigger @@ -0,0 +1,93 @@ +#!/bin/ash + +exec >> /run/stdout +exec 2>> /run/stderr +set -x + +if [ "x$1" != "xbound" -a "x$1" != "xrenew" ] || [ "x$interface" != "xbr0" ] || [ -z "$ip" ]; then + exit 0 +fi + +# If we already got an IP from KCL, see if it differs, and remove first if so +# We just try to prevent everything from breaking if the DHCP server doesn't +# objey the renew request by the client and hands out a new address +if [ -s "/run/firstip" ]; then + #...some address is already configured... + OLD=$(cat "/run/firstip") + if [ "x${OLD}" != "x${ip}" ]; then + #...it's a different one, reconfigure... + echo "..reconfiguring ${OLD} to ${ip}.." + # remove default route and let it be added again below, as it might get lost when changing the primary address on the interface + ip route del default 2>/dev/null + rm -f -- "/run/firstgw" + ip addr del "${OLD}" dev "${interface}" 2>/dev/null + ip addr add "${ip}/$(ipcalc -s -p "${ip}" "${subnet}" | sed s/.*=//)" dev "${interface}" + fi +else + #...no address configured yet, just add... + echo "..adding ${ip}.." + ip addr add "${ip}/$(ipcalc -s -p "${ip}" "${subnet}" | sed s/.*=//)" dev "${interface}" +fi +echo -n "$ip" > "/run/firstip" + +# Same procedure for default gateway +if [ -n "${router}" ]; then + if [ -s "/run/firstgw" ]; then + OLD=$(cat "/run/firstgw") + if [ "x${OLD}" != "x${router}" ]; then + echo "..reconfiguring default gw from ${OLD} to ${router}.." + ip route del default 2>/dev/null + ip route add default via "$router" + fi + else + ip route add default via "$router" + fi + echo -n "$router" > "/run/firstgw" +fi + +rm -f -- "/etc/resolv.conf" + +# DNS/domain? +if [ -n "$dns" ]; then + echo "..got DNS.." + echo "# From DHCP in stage 3.1" >> "/run/config" + echo "SLX_DNS='$dns'" >> "/run/config" +fi +for serv in $dns; do + echo "nameserver $serv" >> "/etc/resolv.conf" +done +if [ -z "$domain" ]; then + # try to get domain via reverse lookup if empty + echo "..trying to get domain via DNS, as DHCP didn't supply one.." + fqdn=$(timeout -t 3 nslookup "$ip" | grep -E "^Address +[0-9]+: +$ip " | head -n 1 | awk '{print $4}') + domain="${fqdn#*.}" +fi +if [ -n "$domain" ]; then + echo "domain $domain" >> "/etc/resolv.conf" +fi +if [ -n "$search" ]; then + echo "search $search" >> "/etc/resolv.conf" +elif [ -n "$domain" ]; then + echo "search $domain" >> "/etc/resolv.conf" +fi + + +# Hostname +if [ -z "$hostname" ]; then + # as with domain, if there's no hostname, try to get via DNS + echo "..trying to get hostname via DNS, as DHCP didn't supply one.." + [ -z "$fqdn" ] && fqdn=$(timeout -t 3 nslookup "$ip" | grep -E "^Address +[0-9]+: +$ip " | head -n 1 | awk '{print $4}') + hostname="${fqdn%%.*}" +elif [ -n "$domain" ]; then + fqdn="${hostname}.${domain%% *}" # in case domain is a list +fi +if [ -n "$hostname" ]; then + [ -z "$fqdn" ] && fqdn="$hostname" + echo "..setting hostname $hostname (fqdn: $fqdn).." + echo "$hostname" > "/proc/sys/kernel/hostname" + echo "$hostname" > "/etc/hostname" + echo "127.0.0.1 localhost" > "/etc/hosts" + echo "127.0.1.1 $fqdn $hostname" >> "/etc/hosts" + echo "SLX_HOSTNAME='$hostname'" >> "/run/config" +fi + |