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=${device##*/}
  48                                         break
  49                                 fi
  50                         fi
  51                 done
  52         fi
  53 }
  54
  55 do_netsetup ()
  56 {
  57         modprobe -q af_packet # For DHCP
  58
  59         udevadm trigger
  60         udevadm settle
  61
  62         [ -n "$ETHDEV_TIMEOUT" ] || ETHDEV_TIMEOUT=15
  63         echo "Using timeout of $ETHDEV_TIMEOUT seconds for network configuration."
  64
  65         if [ -z "${NETBOOT}" ] && [ -z "${FETCH}" ] && [ -z "${HTTPFS}" ] && [ -z "${FTPFS}" ]
  66         then
  67                 # See if we can select the device from BOOTIF
  68                 Device_from_bootif
  69
  70                 # if ethdevice was not specified on the kernel command line
  71                 # make sure we try to get a working network configuration
  72                 # for *every* present network device (except for loopback of course)
  73                 if [ -z "$ETHDEVICE" ]
  74                 then
  75                         echo "If you want to boot from a specific device use bootoption ethdevice=..."
  76                         for device in /sys/class/net/*
  77                         do
  78                                 dev=${device##*/}
  79                                 if [ "$dev" != "lo" ]
  80                                 then
  81                                         ETHDEVICE="$ETHDEVICE $dev"
  82                                 fi
  83                         done
  84                 fi
  85
  86                 # split args of ethdevice=eth0,eth1 into "eth0 eth1"
  87                 for device in $(echo $ETHDEVICE | sed 's/,/ /g')
  88                 do
  89                         devlist="$devlist $device"
  90                 done
  91
  92                 # this is tricky (and ugly) because ipconfig sometimes just hangs/runs into
  93                 # an endless loop; if execution fails give it two further tries, that's
  94                 # why we use '$devlist $devlist $devlist' for the other for loop
  95                 for dev in $devlist $devlist $devlist
  96                 do
  97                         echo "Executing ipconfig -t $ETHDEV_TIMEOUT $dev"
  98                         ipconfig -t "$ETHDEV_TIMEOUT" $dev | tee -a /netboot.config &
  99                         jobid=$!
 100                         sleep "$ETHDEV_TIMEOUT" ; sleep 1
 101                         if [ -r /proc/"$jobid"/status ]
 102                         then
 103                                 echo "Killing job $jobid for device $dev as ipconfig ran into recursion..."
 104                                 kill -9 $jobid
 105                         fi
 106
 107                         # if configuration of device worked we should have an assigned
 108                         # IP address, if so let's use the device as $DEVICE for later usage.
 109                         # simple and primitive approach which seems to work fine
 110                         if ifconfig $dev | grep -q 'inet.*addr:'
 111                         then
 112                                 export DEVICE="$dev"
 113                                 break
 114                         fi
 115                 done
 116         else
 117                 for interface in ${DEVICE}; do
 118                         ipconfig -t "$ETHDEV_TIMEOUT" ${interface} | tee /netboot-${interface}.config
 119
 120                         [ -e /run/net-${interface}.conf ] && . /run/net-${interface}.conf
 121
 122                         if [ "$IPV4ADDR" != "0.0.0.0" ]
 123                         then
 124                                 break
 125                         fi
 126                 done
 127         fi
 128
 129         for interface in ${DEVICE}
 130         do
 131                 # source relevant ipconfig output
 132                 OLDHOSTNAME=${HOSTNAME}
 133
 134                 [ -e /run/net-${interface}.conf ] && . /run/net-${interface}.conf
 135
 136                 [ -z ${HOSTNAME} ] && HOSTNAME=${OLDHOSTNAME}
 137                 export HOSTNAME
 138
 139                 if [ -n "${interface}" ]
 140                 then
 141                         HWADDR="$(cat /sys/class/net/${interface}/address)"
 142                 fi
 143
 144                 if [ ! -e "/etc/resolv.conf" ]
 145                 then
 146                         echo "Creating /etc/resolv.conf"
 147
 148                         if [ -n "${DNSDOMAIN}" ]
 149                         then
 150                                 echo "domain ${DNSDOMAIN}" > /etc/resolv.conf
 151                                 echo "search ${DNSDOMAIN}" >> /etc/resolv.conf
 152                         fi
 153
 154                         for i in ${IPV4DNS0} ${IPV4DNS1} ${IPV4DNS1}
 155                         do
 156                                 if [ -n "$i" ] && [ "$i" != 0.0.0.0 ]
 157                                 then
 158                                         echo "nameserver $i" >> /etc/resolv.conf
 159                                 fi
 160                         done
 161                 fi
 162
 163                 # Check if we have a network device at all
 164                 if ! ls /sys/class/net/"$interface" > /dev/null 2>&1 && \
 165                    ! ls /sys/class/net/eth0 > /dev/null 2>&1 && \
 166                    ! ls /sys/class/net/wlan0 > /dev/null 2>&1 && \
 167                    ! ls /sys/class/net/ath0 > /dev/null 2>&1 && \
 168                    ! ls /sys/class/net/ra0 > /dev/null 2>&1
 169                 then
 170                         panic "No supported network device found, maybe a non-mainline driver is required."
 171                 fi
 172         done
 173 }