modules.d/40network/parse-ip-opts.sh

   1 #!/bin/sh
   2 #
   3 # Format:
   4 #       ip=[dhcp|on|any]
   5 #
   6 #       ip=<interface>:[dhcp|on|any]
   7 #
   8 #       ip=<client-IP-number>:<server-id>:<gateway-IP-number>:<netmask>:<client-hostname>:<interface>:[dhcp|on|any|none|off]
   9 #
  10 # When supplying more than only ip= line, <interface> is mandatory and
  11 # bootdev= must contain the name of the primary interface to use for
  12 # routing,dns,dhcp-options,etc.
  13 #
  14
  15 . /lib/dracut-lib.sh
  16
  17 # Check if ip= lines should be used
  18 if getarg ip= >/dev/null ; then
  19     if [ -z "$netroot" ] ; then
  20         echo "Warning: No netboot configured, ignoring ip= lines"
  21         return;
  22     fi
  23 fi
  24
  25 # Don't mix BOOTIF=macaddr from pxelinux and ip= lines
  26 getarg ip= >/dev/null && getarg BOOTIF= >/dev/null && \
  27     die "Mixing BOOTIF and ip= lines is dangerous"
  28
  29 # No more parsing stuff, BOOTIF says everything
  30 [ -n "$(getarg BOOTIF)" ] && return
  31
  32 if [ -n "$netroot" ] && [ -z "$(getarg ip=)" ] ; then
  33     # No ip= argument(s) for netroot provided, defaulting to DHCP
  34     return;
  35 fi
  36
  37 # Count ip= lines to decide whether we need bootdev= or not
  38 if [ -z "$NEEDBOOTDEV" ] ; then
  39     local count=0
  40     for p in $(getargs ip=); do
  41         count=$(( $count + 1 ))
  42     done
  43     [ $count -gt 1 ] && NEEDBOOTDEV=1
  44 fi
  45
  46 # If needed, check if bootdev= contains anything usable
  47 if [ -n "$NEEDBOOTDEV" ] ; then
  48     BOOTDEV=$(getarg bootdev=) || die "Please supply bootdev argument for multiple ip= lines"
  49     [ -z "$BOOTDEV" ] && die "Bootdev argument is empty"
  50 fi
  51
  52 # Check ip= lines
  53 # XXX Would be nice if we could errorcheck ip addresses here as well
  54 for p in $(getargs ip=); do
  55     ip_to_var $p
  56
  57     # We need to have an ip= line for the specified bootdev
  58     [ -n "$NEEDBOOTDEV" ] && [ "$dev" = "$BOOTDEV" ] && BOOTDEVOK=1
  59
  60     # Empty autoconf defaults to 'dhcp'
  61     if [ -z "$autoconf" ] ; then
  62         warn "Empty autoconf values default to dhcp"
  63         autoconf="dhcp"
  64     fi
  65
  66     # Error checking for autoconf in combination with other values
  67     case $autoconf in
  68         error) die "Error parsing option 'ip=$p'";;
  69         bootp|rarp|both) die "Sorry, ip=$autoconf is currenty unsupported";;
  70         none|off) \
  71             [ -z "$ip" ] && \
  72                 die "For argument 'ip=$p'\nValue '$autoconf' without static configuration does not make sense"
  73             [ -z "$mask" ] && \
  74                 die "Sorry, automatic calculation of netmask is not yet supported"
  75             ;;
  76         dhcp|on|any) \
  77             [ -n "$NEEDBOOTDEV" ] && [ -z "$dev" ] && \
  78                 die "Sorry, 'ip=$p' does not make sense for multiple interface configurations"
  79             [ -n "$ip" ] && \
  80                 die "For argument 'ip=$p'\nSorry, setting client-ip does not make sense for '$autoconf'"
  81             ;;
  82         *) die "For argument 'ip=$p'\nSorry, unknown value '$autoconf'";;
  83     esac
  84
  85     if [ -n "$dev" ] ; then
  86         # We don't like duplicate device configs
  87         if [ -n "$IFACES" ] ; then
  88             for i in $IFACES ; do
  89                 [ "$dev" = "$i" ] && die "For argument 'ip=$p'\nDuplication configurations for '$dev'"
  90             done
  91         fi
  92         # IFACES list for later use
  93         IFACES="$IFACES $dev"
  94     fi
  95
  96     # Small optimization for udev rules
  97     [ -z "$NEEDBOOTDEV" ] && [ -n "$dev" ] && BOOTDEV=$dev
  98
  99     # Do we need to check for specific options?
 100     if [ -n "$NEEDDHCP" ] || [ -n "$DHCPORSERVER" ] ; then
 101         # Correct device? (Empty is ok as well)
 102         [ "$dev" = "$BOOTDEV" ] || continue
 103         # Server-ip is there?
 104         [ -n "$DHCPORSERVER" ] && [ -n "$srv" ] && continue
 105         # dhcp? (It's simpler to check for a set ip. Checks above ensure that if
 106         # ip is there, we're static
 107         [ -z "$ip" ] && continue
 108         # Not good!
 109         die "Server-ip or dhcp for netboot needed, but current arguments say otherwise"
 110     fi
 111
 112 done
 113
 114 # This ensures that BOOTDEV is always first in IFACES
 115 if [ -n "$BOOTDEV" ] && [ -n "$IFACES" ] ; then
 116     IFACES="${IFACES%$BOOTDEV*} ${IFACES#*$BOOTDEV}"
 117     IFACES="$BOOTDEV $IFACES"
 118 fi
 119
 120 # Store BOOTDEV and IFACES for later use
 121 [ -n "$BOOTDEV" ] && echo $BOOTDEV > /tmp/net.bootdev
 122 [ -n "$IFACES" ]  && echo $IFACES > /tmp/net.ifaces
 123
 124 # We need a ip= line for the configured bootdev=
 125 [ -n "$NEEDBOOTDEV" ] && [ -z "$BOOTDEVOK" ] && die "Bootdev Argument '$BOOTDEV' not found"