components/9990-networking.sh

   1 #!/bin/sh
   2
   3 #set -e
   4
   5 Device_from_bootif ()
   6 {
   7         # support for Syslinux IPAPPEND parameter
   8         # it sets the BOOTIF variable on the kernel parameter
   9
  10         if [ -n "${BOOTIF}" ]
  11         then
  12         # pxelinux sets BOOTIF to a value based on the mac address of the
  13         # network card used to PXE boot, so use this value for DEVICE rather
  14         # than a hard-coded device name from initramfs.conf. this facilitates
  15         # network booting when machines may have multiple network cards.
  16         # pxelinux sets BOOTIF to 01-$mac_address
  17
  18         # strip off the leading "01-", which isn't part of the mac
  19         # address
  20         temp_mac=${BOOTIF#*-}
  21
  22         # convert to typical mac address format by replacing "-" with ":"
  23         bootif_mac=""
  24         IFS='-'
  25         for x in $temp_mac
  26         do
  27                 if [ -z "$bootif_mac" ]
  28                 then
  29                         bootif_mac="$x"
  30                 else
  31                         bootif_mac="$bootif_mac:$x"
  32                 fi
  33         done
  34         unset IFS
  35
  36         # look for devices with matching mac address, and set DEVICE to
  37         # appropriate value if match is found.
  38
  39         for device in /sys/class/net/*
  40         do
  41                 if [ -f "$device/address" ]
  42                 then
  43                 current_mac=$(cat "$device/address")
  44
  45                         if [ "$bootif_mac" = "$current_mac" ]
  46                         then
  47                                 DEVICE=${device##*/}
  48                                 break
  49                         fi
  50                 fi
  51         done
  52         fi
  53
  54 }
  55
  56 do_netsetup ()
  57 {
  58         modprobe -q af_packet # For DHCP
  59
  60         udevadm trigger
  61         udevadm settle
  62
  63         [ -n "$ETHDEV_TIMEOUT" ] || ETHDEV_TIMEOUT=15
  64         echo "Using timeout of $ETHDEV_TIMEOUT seconds for network configuration."
  65
  66         if [ -z "${NETBOOT}" ] && [ -z "${FETCH}" ] && [ -z "${HTTPFS}" ] && [ -z "${FTPFS}" ]
  67         then
  68                 # See if we can select the device from BOOTIF
  69                 Device_from_bootif
  70
  71                 # if ethdevice was not specified on the kernel command line
  72                 # make sure we try to get a working network configuration
  73                 # for *every* present network device (except for loopback of course)
  74                 if [ -z "$ETHDEVICE" ]
  75                 then
  76                         echo "If you want to boot from a specific device use bootoption ethdevice=..."
  77                         for device in /sys/class/net/*
  78                         do
  79                                 dev=${device##*/}
  80                                 if [ "$dev" != "lo" ]
  81                                 then
  82                                         ETHDEVICE="$ETHDEVICE $dev"
  83                                 fi
  84                         done
  85                 fi
  86
  87                 # split args of ethdevice=eth0,eth1 into "eth0 eth1"
  88                 for device in $(echo $ETHDEVICE | sed 's/,/ /g')
  89                 do
  90                         devlist="$devlist $device"
  91                 done
  92
  93                 # this is tricky (and ugly) because ipconfig sometimes just hangs/runs into
  94                 # an endless loop; if execution fails give it two further tries, that's
  95                 # why we use '$devlist $devlist $devlist' for the other for loop
  96                 for dev in $devlist $devlist $devlist
  97                 do
  98                         echo "Executing ipconfig -t $ETHDEV_TIMEOUT $dev"
  99                         ipconfig -t "$ETHDEV_TIMEOUT" $dev | tee -a /netboot.config &
 100                         jobid=$!
 101                         sleep "$ETHDEV_TIMEOUT" ; sleep 1
 102                         if [ -r /proc/"$jobid"/status ]
 103                         then
 104                                 echo "Killing job $jobid for device $dev as ipconfig ran into recursion..."
 105                                 kill -9 $jobid
 106                         fi
 107
 108                         # if configuration of device worked we should have an assigned
 109                         # IP address, if so let's use the device as $DEVICE for later usage.
 110                         # simple and primitive approach which seems to work fine
 111                         if ifconfig $dev | grep -q 'inet.*addr:'
 112                         then
 113                                 export DEVICE="$dev"
 114                                 break
 115                         fi
 116                 done
 117         else
 118                 for interface in ${DEVICE}; do
 119                         ipconfig -t "$ETHDEV_TIMEOUT" ${interface} | tee /netboot-${interface}.config
 120
 121                         [ -e /run/net-${interface}.conf ] && . /run/net-${interface}.conf
 122
 123                         if [ "$IPV4ADDR" != "0.0.0.0" ]
 124                         then
 125                                 break
 126                         fi
 127                 done
 128         fi
 129
 130         for interface in ${DEVICE}
 131         do
 132                 # source relevant ipconfig output
 133                 OLDHOSTNAME=${HOSTNAME}
 134
 135                 [ -e /run/net-${interface}.conf ] && . /run/net-${interface}.conf
 136
 137                 [ -z ${HOSTNAME} ] && HOSTNAME=${OLDHOSTNAME}
 138                 export HOSTNAME
 139
 140                 if [ -n "${interface}" ]
 141                 then
 142                         HWADDR="$(cat /sys/class/net/${interface}/address)"
 143                 fi
 144
 145                 if [ ! -e "/etc/resolv.conf" ]
 146                 then
 147                         echo "Creating /etc/resolv.conf"
 148
 149                         if [ -n "${DNSDOMAIN}" ]
 150                         then
 151                                 echo "domain ${DNSDOMAIN}" > /etc/resolv.conf
 152                                 echo "search ${DNSDOMAIN}" >> /etc/resolv.conf
 153                         fi
 154
 155                         for i in ${IPV4DNS0} ${IPV4DNS1} ${IPV4DNS1}
 156                         do
 157                                 if [ -n "$i" ] && [ "$i" != 0.0.0.0 ]
 158                                 then
 159                                         echo "nameserver $i" >> /etc/resolv.conf
 160                                 fi
 161                         done
 162                 fi
 163
 164                 # Check if we have a network device at all
 165                 if ! ls /sys/class/net/"$interface" > /dev/null 2>&1 && \
 166                    ! ls /sys/class/net/eth0 > /dev/null 2>&1 && \
 167                    ! ls /sys/class/net/wlan0 > /dev/null 2>&1 && \
 168                    ! ls /sys/class/net/ath0 > /dev/null 2>&1 && \
 169                    ! ls /sys/class/net/ra0 > /dev/null 2>&1
 170                 then
 171                         panic "No supported network device found, maybe a non-mainline driver is required."
 172                 fi
 173         done
 174 }