76 lines
2.0 KiB
Bash
Executable File
76 lines
2.0 KiB
Bash
Executable File
#!/bin/sh
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# udhcpc script edited by Tim Riker <Tim@Rikers.org>
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RESOLV_CONF="/etc/resolv.conf"
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[ -n "$1" ] || { echo "Error: should be called from udhcpc"; exit 1; }
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NETMASK=""
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if command -v ip >/dev/null; then
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[ -n "$subnet" ] && NETMASK="/$subnet"
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else
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[ -n "$subnet" ] && NETMASK="netmask $subnet"
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fi
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BROADCAST="broadcast +"
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[ -n "$broadcast" ] && BROADCAST="broadcast $broadcast"
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case "$1" in
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deconfig)
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echo "Clearing IP addresses on $interface, upping it"
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if command -v ip >/dev/null; then
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ip addr flush dev $interface
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ip link set dev $interface up
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else
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ifconfig $interface 0.0.0.0
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fi
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;;
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renew|bound)
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echo "Setting IP address $ip on $interface"
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if command -v ip >/dev/null; then
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ip addr add $ip$NETMASK $BROADCAST dev $interface
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else
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ifconfig $interface $ip $NETMASK $BROADCAST
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fi
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if [ -n "$router" ] ; then
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echo "Deleting routers"
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while route del default gw 0.0.0.0 dev $interface ; do
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:
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done
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metric=0
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for i in $router ; do
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echo "Adding router $i"
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if [ "$subnet" = "255.255.255.255" ]; then
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# special case for /32 subnets:
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# /32 instructs kernel to always use routing for all outgoing packets
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# (they can never be sent to local subnet - there is no local subnet for /32).
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# Used in datacenters, avoids the need for private ip-addresses between two hops.
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ip route add $i dev $interface
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fi
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route add default gw $i dev $interface metric $((metric++))
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done
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fi
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echo "Recreating $RESOLV_CONF"
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# If the file is a symlink somewhere (like /etc/resolv.conf
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# pointing to /run/resolv.conf), make sure things work.
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if test -L "$RESOLV_CONF"; then
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# If it's a dangling symlink, try to create the target.
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test -e "$RESOLV_CONF" || touch "$RESOLV_CONF"
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fi
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realconf=$(readlink -f "$RESOLV_CONF" 2>/dev/null || echo "$RESOLV_CONF")
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tmpfile="$realconf-$$"
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> "$tmpfile"
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[ -n "$domain" ] && echo "search $domain" >> "$tmpfile"
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for i in $dns ; do
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echo " Adding DNS server $i"
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echo "nameserver $i" >> "$tmpfile"
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done
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mv "$tmpfile" "$realconf"
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;;
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esac
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exit 0
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