udhcpc.script 3.0 KB

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  1. #!/bin/sh
  2. # udhcpc script edited by Tim Riker <Tim@Rikers.org>
  3. [ -z "$1" ] && echo "Error: should be called from udhcpc" && exit 1
  4. RESOLV_CONF="/etc/resolv.conf"
  5. [ -e $RESOLV_CONF ] || touch $RESOLV_CONF
  6. [ -n "$broadcast" ] && BROADCAST="broadcast $broadcast"
  7. [ -n "$subnet" ] && NETMASK="netmask $subnet"
  8. # Handle stateful DHCPv6 like DHCPv4
  9. [ -n "$ipv6" ] && ip="$ipv6/128"
  10. if [ -z "${IF_WAIT_DELAY}" ]; then
  11. IF_WAIT_DELAY=10
  12. fi
  13. wait_for_ipv6_default_route() {
  14. printf "Waiting for IPv6 default route to appear"
  15. while [ $IF_WAIT_DELAY -gt 0 ]; do
  16. if [ -z "$(ip -6 route list | grep default)" ]; then
  17. printf "\n"
  18. return
  19. fi
  20. sleep 1
  21. printf "."
  22. : $((IF_WAIT_DELAY -= 1))
  23. done
  24. printf " timeout!\n"
  25. }
  26. case "$1" in
  27. deconfig)
  28. /sbin/ifconfig $interface up
  29. /sbin/ifconfig $interface 0.0.0.0
  30. # drop info from this interface
  31. # resolv.conf may be a symlink to /tmp/, so take care
  32. TMPFILE=$(mktemp)
  33. grep -vE "# $interface\$" $RESOLV_CONF > $TMPFILE
  34. cat $TMPFILE > $RESOLV_CONF
  35. rm -f $TMPFILE
  36. if [ -x /usr/sbin/avahi-autoipd ]; then
  37. /usr/sbin/avahi-autoipd -c $interface && /usr/sbin/avahi-autoipd -k $interface
  38. fi
  39. ;;
  40. leasefail|nak)
  41. if [ -x /usr/sbin/avahi-autoipd ]; then
  42. /usr/sbin/avahi-autoipd -c $interface || /usr/sbin/avahi-autoipd -wD $interface --no-chroot
  43. fi
  44. ;;
  45. renew|bound)
  46. if [ -x /usr/sbin/avahi-autoipd ]; then
  47. /usr/sbin/avahi-autoipd -c $interface && /usr/sbin/avahi-autoipd -k $interface
  48. fi
  49. /sbin/ifconfig $interface $ip $BROADCAST $NETMASK
  50. if [ -n "$ipv6" ] ; then
  51. wait_for_ipv6_default_route
  52. fi
  53. # RFC3442: If the DHCP server returns both a Classless
  54. # Static Routes option and a Router option, the DHCP
  55. # client MUST ignore the Router option.
  56. if [ -n "$staticroutes" ]; then
  57. echo "deleting routers"
  58. route -n | while read dest gw mask flags metric ref use iface; do
  59. [ "$iface" != "$interface" -o "$gw" = "0.0.0.0" ] || \
  60. route del -net "$dest" netmask "$mask" gw "$gw" dev "$interface"
  61. done
  62. # format: dest1/mask gw1 ... destn/mask gwn
  63. set -- $staticroutes
  64. while [ -n "$1" -a -n "$2" ]; do
  65. route add -net "$1" gw "$2" dev "$interface"
  66. shift 2
  67. done
  68. elif [ -n "$router" ] ; then
  69. echo "deleting routers"
  70. while route del default gw 0.0.0.0 dev $interface 2> /dev/null; do
  71. :
  72. done
  73. for i in $router ; do
  74. route add default gw $i dev $interface
  75. done
  76. fi
  77. # drop info from this interface
  78. # resolv.conf may be a symlink to /tmp/, so take care
  79. TMPFILE=$(mktemp)
  80. grep -vE "# $interface\$" $RESOLV_CONF > $TMPFILE
  81. cat $TMPFILE > $RESOLV_CONF
  82. rm -f $TMPFILE
  83. # prefer rfc3397 domain search list (option 119) if available
  84. if [ -n "$search" ]; then
  85. search_list=$search
  86. elif [ -n "$domain" ]; then
  87. search_list=$domain
  88. fi
  89. [ -n "$search_list" ] &&
  90. echo "search $search_list # $interface" >> $RESOLV_CONF
  91. for i in $dns ; do
  92. echo adding dns $i
  93. echo "nameserver $i # $interface" >> $RESOLV_CONF
  94. done
  95. ;;
  96. esac
  97. HOOK_DIR="$0.d"
  98. for hook in "${HOOK_DIR}/"*; do
  99. [ -f "${hook}" -a -x "${hook}" ] || continue
  100. "${hook}" "${@}"
  101. done
  102. exit 0