1 | #!/bin/sh |
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2 | # |
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3 | # ip-down.ipv6to4 |
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4 | # |
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5 | # |
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6 | # Taken from: |
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7 | # (P) & (C) 2000-2005 by Peter Bieringer <pb@bieringer.de> |
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8 | # |
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9 | # You will find more information on the initscripts-ipv6 homepage at |
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10 | # http://www.deepspace6.net/projects/initscripts-ipv6.html |
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11 | # |
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12 | # Version 2005-09-22 |
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13 | # |
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14 | # Calling parameters: |
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15 | # $1: interface name |
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16 | # |
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17 | # Called (mostly) by /etc/ppp/ip-down.local |
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18 | # like: /etc/ppp/ip-down.ipv6to4 $1 >>/var/log/ppp-ipv6to4.log 2>&1 |
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19 | # |
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20 | # Note: this script will *check* whether the existing 6to4 tunnel |
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21 | # was set before by using "ip-up.ipv6to4" comparing IPv4 address |
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22 | # of device with the generated 6to4 prefix |
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23 | # |
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24 | # Uses following information from /etc/sysconfig/network-scripts/ifcfg-$1: |
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25 | # IPV6TO4INIT=yes|no: controls configuration |
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26 | # IPV6TO4_ROUTING="<device>-<suffix>/<prefix length> ...": information to setup additional interfaces |
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27 | # |
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28 | # IPV6_CONTROL_RADVD=yes|no: controls radvd triggering |
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29 | # IPV6_RADVD_PIDFILE=<file>: PID file of radvd for sending signals, default is "/var/run/radvd/radvd.pid" |
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30 | # IPV6_RADVD_TRIGGER_ACTION=startstop|reload|restart|SIGHUP: how to trigger radvd (optional, default is SIGHUP) |
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31 | # |
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32 | |
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33 | |
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34 | if [ -z "$1" ]; then |
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35 | echo $"Argument 1 is empty but should contain interface name - skip IPv6to4 initialization" |
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36 | exit 1 |
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37 | fi |
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38 | |
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39 | # Get global network configuration |
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40 | . /etc/sysconfig/network |
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41 | |
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42 | # Source IPv4 helper functions |
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43 | cd /etc/sysconfig/network-scripts |
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44 | . ./network-functions |
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45 | |
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46 | CONFIG=$1 |
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47 | [ -f "$CONFIG" ] || CONFIG=ifcfg-$CONFIG |
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48 | source_config |
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49 | |
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50 | # IPv6 don't need aliases anymore, config is skipped |
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51 | REALDEVICE=`echo ${DEVICE} | sed 's/:.*//g'` |
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52 | [ "$DEVICE" != "$REALDEVICE" ] && exit 0 |
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53 | |
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54 | if [ ! -f /etc/sysconfig/network-scripts/network-functions-ipv6 ]; then |
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55 | exit 1 |
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56 | fi |
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57 | |
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58 | . /etc/sysconfig/network-scripts/network-functions-ipv6 |
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59 | |
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60 | |
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61 | # Run basic IPv6 test, if not ok, skip IPv6 initialization |
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62 | ipv6_test testonly || exit 0 |
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63 | |
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64 | # Test status of ppp device |
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65 | ipv6_test_device_status $DEVICE |
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66 | if [ $? != 0 -a $? != 11 ]; then |
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67 | # device doesn't exist or other problem occurs |
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68 | exit 1 |
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69 | fi |
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70 | |
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71 | # Test status of tun6to4 device |
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72 | ipv6_test_device_status tun6to4 |
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73 | if [ $? = 0 -o $? = 11 ]; then |
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74 | # Device exists |
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75 | valid6to4config="yes" |
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76 | |
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77 | # Get IPv4 address from interface |
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78 | ipv4addr="`ipv6_get_ipv4addr_of_device $DEVICE`" |
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79 | if [ -z "$ipv4addr" ]; then |
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80 | # Has no IPv4 address |
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81 | valid6to4config="no" |
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82 | fi |
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83 | |
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84 | # Get local IPv4 address of dedicated tunnel |
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85 | ipv4addr6to4local="`ipv6_get_ipv4addr_of_tunnel tun6to4 local`" |
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86 | |
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87 | # IPv6to4 not enabled on this interface? |
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88 | if [ $IPV6TO4INIT != "yes" ]; then |
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89 | # Check against configured 6to4 tunnel to see if this interface was regardless used before |
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90 | if [ "$ipv4addr" != "$ipv4addr6to4local" ]; then |
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91 | # IPv4 address of interface does't match local tunnel address, interface was not used for current 6to4 setup |
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92 | valid6to4config="no" |
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93 | fi |
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94 | fi |
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95 | |
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96 | fi |
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97 | |
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98 | if [ "$valid6to4config" = "yes" ]; then |
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99 | if [ "$IPV6_CONTROL_RADVD" = "yes" ]; then |
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100 | # Control running radvd |
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101 | ipv6_trigger_radvd down "$IPV6_RADVD_TRIGGER_ACTION" $IPV6_RADVD_PIDFILE |
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102 | fi |
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103 | |
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104 | if [ -n "$IPV6TO4_ROUTING" ]; then |
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105 | # Delete routes to local networks |
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106 | for devsuf in $IPV6TO4_ROUTING; do |
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107 | dev="`echo $devsuf | awk -F- '{ print $1 }'`" |
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108 | ipv6_cleanup_6to4_device $dev |
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109 | done |
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110 | fi |
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111 | |
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112 | # Delete all configured 6to4 address |
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113 | ipv6_cleanup_6to4_tunnels tun6to4 |
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114 | fi |
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