scripts/boot/9990-networking.sh

   1 #!/bin/sh
   2
   3 #set -e
   4
   5 do_netsetup ()
   6 {
   7         modprobe -q af_packet # For DHCP
   8
   9         udevadm trigger
  10         udevadm settle
  11
  12         [ -n "$ETHDEV_TIMEOUT" ] || ETHDEV_TIMEOUT=15
  13         echo "Using timeout of $ETHDEV_TIMEOUT seconds for network configuration."
  14
  15         if [ -z "${NETBOOT}" ] && [ -z "${FETCH}" ] && [ -z "${HTTPFS}" ] && [ -z "${FTPFS}" ]
  16         then
  17                 # support for Syslinux IPAPPEND parameter
  18                 # it sets the BOOTIF variable on the kernel parameter
  19
  20                 if [ -n "${BOOTIF}" ]
  21                 then
  22                         # pxelinux sets BOOTIF to a value based on the mac address of the
  23                         # network card used to PXE boot, so use this value for DEVICE rather
  24                         # than a hard-coded device name from initramfs.conf. this facilitates
  25                         # network booting when machines may have multiple network cards.
  26                         # pxelinux sets BOOTIF to 01-$mac_address
  27
  28                         # strip off the leading "01-", which isn't part of the mac
  29                         # address
  30                         temp_mac=${BOOTIF#*-}
  31
  32                         # convert to typical mac address format by replacing "-" with ":"
  33                         bootif_mac=""
  34                         IFS='-'
  35                         for x in $temp_mac
  36                         do
  37                                 if [ -z "$bootif_mac" ]
  38                                 then
  39                                         bootif_mac="$x"
  40                                 else
  41                                         bootif_mac="$bootif_mac:$x"
  42                                 fi
  43                         done
  44                         unset IFS
  45
  46                         # look for devices with matching mac address, and set DEVICE to
  47                         # appropriate value if match is found.
  48
  49                         for device in /sys/class/net/*
  50                         do
  51                                 if [ -f "$device/address" ]
  52                                 then
  53                                         current_mac=$(cat "$device/address")
  54
  55                                         if [ "$bootif_mac" = "$current_mac" ]
  56                                         then
  57                                                 DEVICE=${device##*/}
  58                                                 break
  59                                         fi
  60                                 fi
  61                         done
  62                 fi
  63
  64                 # if ethdevice was not specified on the kernel command line
  65                 # make sure we try to get a working network configuration
  66                 # for *every* present network device (except for loopback of course)
  67                 if [ -z "$ETHDEVICE" ]
  68                 then
  69                         echo "If you want to boot from a specific device use bootoption ethdevice=..."
  70                         for device in /sys/class/net/*
  71                         do
  72                                 dev=${device##*/}
  73                                 if [ "$dev" != "lo" ]
  74                                 then
  75                                         ETHDEVICE="$ETHDEVICE $dev"
  76                                 fi
  77                         done
  78                 fi
  79
  80                 # split args of ethdevice=eth0,eth1 into "eth0 eth1"
  81                 for device in $(echo $ETHDEVICE | sed 's/,/ /g')
  82                 do
  83                         devlist="$devlist $device"
  84                 done
  85
  86                 # this is tricky (and ugly) because ipconfig sometimes just hangs/runs into
  87                 # an endless loop; if execution fails give it two further tries, that's
  88                 # why we use '$devlist $devlist $devlist' for the other for loop
  89                 for dev in $devlist $devlist $devlist
  90                 do
  91                         echo "Executing ipconfig -t $ETHDEV_TIMEOUT $dev"
  92                         ipconfig -t "$ETHDEV_TIMEOUT" $dev | tee -a /netboot.config &
  93                         jobid=$!
  94                         sleep "$ETHDEV_TIMEOUT" ; sleep 1
  95                         if [ -r /proc/"$jobid"/status ]
  96                         then
  97                                 echo "Killing job $jobid for device $dev as ipconfig ran into recursion..."
  98                                 kill -9 $jobid
  99                         fi
 100
 101                         # if configuration of device worked we should have an assigned
 102                         # IP address, if so let's use the device as $DEVICE for later usage.
 103                         # simple and primitive approach which seems to work fine
 104                         if ifconfig $dev | grep -q 'inet.*addr:'
 105                         then
 106                                 export DEVICE="$dev"
 107                                 break
 108                         fi
 109                 done
 110         else
 111                 for interface in ${DEVICE}; do
 112                         ipconfig -t "$ETHDEV_TIMEOUT" ${interface} | tee /netboot-${interface}.config
 113
 114                         # squeeze
 115                         [ -e /tmp/net-${interface}.conf ] && . /tmp/net-${interface}.conf
 116
 117                         # wheezy
 118                         [ -e /run/net-${interface}.conf ] && . /run/net-${interface}.conf
 119
 120                         if [ "$IPV4ADDR" != "0.0.0.0" ]
 121                         then
 122                                 break
 123                         fi
 124                 done
 125         fi
 126
 127         for interface in ${DEVICE}
 128         do
 129                 # source relevant ipconfig output
 130                 OLDHOSTNAME=${HOSTNAME}
 131
 132                 # squeeze
 133                 [ -e /tmp/net-${interface}.conf ] && . /tmp/net-${interface}.conf
 134
 135                 # wheezy
 136                 [ -e /run/net-${interface}.conf ] && . /run/net-${interface}.conf
 137
 138                 [ -z ${HOSTNAME} ] && HOSTNAME=${OLDHOSTNAME}
 139                 export HOSTNAME
 140
 141                 if [ -n "${interface}" ]
 142                 then
 143                         HWADDR="$(cat /sys/class/net/${interface}/address)"
 144                 fi
 145
 146                 if [ ! -e "/etc/resolv.conf" ]
 147                 then
 148                         echo "Creating /etc/resolv.conf"
 149
 150                         if [ -n "${DNSDOMAIN}" ]
 151                         then
 152                                 echo "domain ${DNSDOMAIN}" > /etc/resolv.conf
 153                                 echo "search ${DNSDOMAIN}" >> /etc/resolv.conf
 154                         fi
 155
 156                         for i in ${IPV4DNS0} ${IPV4DNS1} ${IPV4DNS1}
 157                         do
 158                                 if [ -n "$i" ] && [ "$i" != 0.0.0.0 ]
 159                                 then
 160                                         echo "nameserver $i" >> /etc/resolv.conf
 161                                 fi
 162                         done
 163                 fi
 164
 165                 # Check if we have a network device at all
 166                 if ! ls /sys/class/net/"$interface" > /dev/null 2>&1 && \
 167                    ! ls /sys/class/net/eth0 > /dev/null 2>&1 && \
 168                    ! ls /sys/class/net/wlan0 > /dev/null 2>&1 && \
 169                    ! ls /sys/class/net/ath0 > /dev/null 2>&1 && \
 170                    ! ls /sys/class/net/ra0 > /dev/null 2>&1
 171                 then
 172                         panic "No supported network device found, maybe a non-mainline driver is required."
 173                 fi
 174         done
 175 }