#!/bin/sh
# Copyright (c) 2003 - 2006 - RZ Uni Freiburg
# Copyright (c) 2006, 2007 - OpenSLX GmbH
#
# This program is free software distributed under the GPL version 2.
# See http://openslx.org/COPYING
#
# If you have any feedback please consult http://openslx.org/feedback and
# send your feedback to feedback@openslx.org
#
# General information about OpenSLX can be found under http://openslx.org
#
# Universal (distro independent) IP configuration writer for several dhcp 
# clients used within OpenSLX initramfs. The result is written in unified
# form to the /etc/machine-setup file

# client variable should be exported via calling function
cfgfile="/tmp/confviadhcp"
cfgmsg="\n## Configuration written by $0"
infomsg="# --> You are using $dhcl. With this client you are not \
able to\n# transfer any vendor specific, self defined dhcp options. If \
this is\n# intended, use dhclient instead or get them via tftp (to be \
enabled\n# via kernel command line)."
# heavy debugging output in level 3 and above ... and on 13
#FIXME: DEBUGLEVEL is not propagated to this file (at least for Ubuntu)
[ -z "$DEBUGLEVEL" ] && DEBUGLEVEL=0
[ $DEBUGLEVEL -gt 3 -a $DEBUGLEVEL -lt 8 -o $DEBUGLEVEL -eq 13 ] && \
  set -x
case $0 in
  *dhcpcd*)
    dhcl="dhcpcd"; echo -e "$cfgmsg\n$infomsg" >>/tmp/confviadhcp
    sed -e "s,',\",g;s,IPADDR,clientip,;s,NETMASK,subnet_mask," \
      -e "s,GATEWAY,gateway,;s,BROADCAST,broadcast_address," \
      -e "s,HOSTNAME,host_name,;s,DOMAIN,domain_name," \
      -e "/=[^']/s/=\(.*\)/='\1'/;/DNS/s/,/ /;/NTPSERVERS/s/,/ /" \
      -e "s,ROOTPATH,root_path,;s,DNS,domain_name_servers," \
      -e "s,NTPSERVERS,ntp_servers,;s,DHCPSID,serverip," \
      -e "s,WINSSERVERS,netbios_name_servers," \
      -e "s,NETWORK,network," \
      -e "s,DHCP..ADDR.*,,;s,.*TIME=.*,,;s,CL.*,,;/^$/d" \
      -e "s,INTER.*,,;s,DHCPSNAME.*,," /var/lib/dhcp/dhcpcd-eth0.info \
        >>$cfgfile
  ;;
  *dhclient*)
    if [ $reason = "BOUND" ] ; then
      echo -e "$cfgmsg\n# --> You are using dhclient. If you wish to \
transfer other vendor/user\n# specific variables, you have to add \
them in functions and in\n# dhcpmkconfig script or use  tftp (to be \
enabled via kernel command\n# line)." >>$cfgfile
      set | sed -n -e '/^new/p' | sed \
        -e "s,^new_,,;s,fixed_address,clientip," \
        -e "s,routers,gateway,;s,dhcp_server_identifier,serverip," \
        -e "s,.*_t[iy][mp]e.*,,;s,.*_message_.*,,;/^$/d" \
        -e "s,language=,country=,;s,ip_address,clientip," \
          >>$cfgfile
     fi
  ;;
  *udhcpc*)
    dhcl="udhcpc"; echo -e "$cfgmsg\n$infomsg" >>$cfgfile
    # if $cfgfile is changed change target for set output accordingly
    unset infomsg HOME IFS mask lease interface cfgmsg cfgfile
    unset DEBUGLEVEL
    set | sed \
      -e "s,^P.*,,;s,ntpsrv,ntp_servers,;s,ip,clientip," \
      -e "s,serverid,serverip,;s,subnet,subnet_mask," \
      -e "s,router,gateway,;s,hostname,host_name," \
      -e "s,domain,domain_name,;s,dns,domain_name_servers," \
      -e "s,broadcast,broadcast_address,;s,dhc.*,,;/^$/d" \
      -e "/OPTIND.*/d" \
        >>/tmp/confviadhcp
  ;;
esac