1 | #!/bin/sh |
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2 | # |
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3 | # ip-up.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-up.local |
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18 | # like: /etc/ppp/ip-up.ipv6to4 $1 >>/var/log/ppp-ipv6to4.log 2>&1 |
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19 | # |
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20 | # Note: this script will *kill* older still existing 6to4 tunnels regardless |
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21 | # whether they were set before by another device |
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22 | # |
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23 | # Uses following information from /etc/sysconfig/network-scripts/ifcfg-$1: |
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24 | # IPV6TO4INIT=yes|no: controls configuration |
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25 | # IPV6TO4_IPV4ADDR=<IPv4 address>: special local address for 6to4 tunneling (only needed behind a NAT gateway) |
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26 | # IPV6TO4_RELAY=<IPv4 address>: remote 6to4 relay router address (default: 192.88.99.1) |
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27 | # IPV6TO4_MTU=<MTU for IPv6>: controls IPv6 MTU for the 6to4 link (optional, default is MTU of interface - 20) |
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28 | # IPV6TO4_ROUTING="<device>-<suffix>/<prefix length> ...": information to setup additional interfaces |
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29 | # Example: IPV6TO4_ROUTING="eth0-:f101::1/64 eth1-:f102::1/64" |
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30 | # |
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31 | # IPV6_CONTROL_RADVD=yes|no: controls radvd triggering |
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32 | # IPV6_RADVD_PIDFILE=<file>: PID file of radvd for sending signals, default is "/var/run/radvd/radvd.pid" |
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33 | # IPV6_RADVD_TRIGGER_ACTION=startstop|reload|restart|SIGHUP: how to trigger radvd (optional, default is SIGHUP) |
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34 | # |
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35 | # Requirements |
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36 | # radvd-0.6.2p3 or newer supporting option "Base6to4Interface" |
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37 | # |
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38 | |
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39 | |
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40 | if [ -z "$1" ]; then |
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41 | echo $"Argument 1 is empty but should contain interface name - skip IPv6to4 initialization" |
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42 | exit 1 |
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43 | fi |
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44 | |
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45 | # Get global network configuration |
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46 | . /etc/sysconfig/network |
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47 | |
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48 | # Source IPv4 helper functions |
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49 | cd /etc/sysconfig/network-scripts |
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50 | . ./network-functions |
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51 | |
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52 | CONFIG=$1 |
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53 | [ -f "$CONFIG" ] || CONFIG=ifcfg-$CONFIG |
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54 | source_config |
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55 | |
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56 | # IPv6 don't need aliases anymore, config is skipped |
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57 | REALDEVICE=`echo ${DEVICE} | sed 's/:.*//g'` |
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58 | [ "$DEVICE" != "$REALDEVICE" ] && exit 0 |
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59 | |
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60 | if [ ! -f /etc/sysconfig/network-scripts/network-functions-ipv6 ]; then |
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61 | exit 1 |
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62 | fi |
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63 | |
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64 | . /etc/sysconfig/network-scripts/network-functions-ipv6 |
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65 | |
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66 | |
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67 | # Run basic IPv6 test (and make sure the ipv6 module will be loaded), if not ok, skip IPv6 initialization |
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68 | ipv6_test || exit 1 |
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69 | |
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70 | # Setup of 6to4, if configured |
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71 | valid6to4config="yes" |
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72 | if [ "$IPV6TO4INIT" = "yes" ]; then |
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73 | if [ -n "$IPV6TO4_IPV4ADDR" ]; then |
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74 | # Take 6to4-dedicated configured IPv4 address from config file (precedence 1) |
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75 | ipv4addr="$IPV6TO4_IPV4ADDR" |
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76 | else |
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77 | # Get IPv4 address from interface (precedence 2) |
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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 | # Take configured IPv4 address of interface from config file (precedence 3) |
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81 | ipv4addr="$IPADDR" |
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82 | fi |
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83 | fi |
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84 | if [ -n "$ipv4addr" ]; then |
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85 | # Test for non-global IPv4 address |
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86 | if ! ipv6_test_ipv4_addr_global_usable $ipv4addr; then |
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87 | echo $"Given IPv4 address '$ipv4addr' is not globally usable" |
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88 | valid6to4config="no" |
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89 | fi |
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90 | else |
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91 | echo $"IPv6to4 configuration needs an IPv4 address on related interface or otherwise specified" |
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92 | valid6to4config="no" |
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93 | fi |
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94 | if [ -z "$IPV6TO4_RELAY" ]; then |
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95 | IPV6TO4_RELAY="192.88.99.1" |
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96 | fi |
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97 | |
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98 | # Check/generate relay address |
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99 | ipv6to4_relay="`ipv6_create_6to4_relay_address $IPV6TO4_RELAY`" |
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100 | if [ $? -ne 0 ]; then |
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101 | valid6to4config="no" |
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102 | fi |
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103 | |
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104 | if [ "$valid6to4config" = "yes" ]; 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 | |
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111 | # Cleanup all old data (needed, if "ip-down.ipv6to4" wasn't executed), delete all configured 6to4 address |
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112 | ipv6_cleanup_6to4_tunnels tun6to4 |
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113 | |
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114 | # Get MTU of master device |
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115 | ipv4mtu="`ipv6_exec_ip link show dev $DEVICE | grep -w "mtu" | awk '{ print $5 }'`" |
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116 | if [ -n "$ipv4mtu" ]; then |
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117 | # IPv6 tunnel MTU is IPv4 MTU minus 20 for IPv4 header |
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118 | tunnelmtu=$[ $ipv4mtu - 20 ] |
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119 | fi |
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120 | |
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121 | if [ -n "$IPV6TO4_MTU" ]; then |
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122 | if [ $IPV6TO4_MTU -gt $tunnelmtu ]; then |
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123 | echo $"Warning: configured MTU '$IPV6TO4_MTU' for 6to4 exceeds maximum limit of '$tunnelmtu', ignored" |
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124 | else |
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125 | tunnelmtu=$IPV6TO4_MTU |
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126 | fi |
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127 | fi |
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128 | |
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129 | # Setup new data |
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130 | ipv6_add_6to4_tunnel tun6to4 $ipv4addr "" $tunnelmtu || exit 1 |
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131 | |
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132 | # Add route to for compatible addresses (removed later again) |
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133 | ipv6_add_route "::/96" "::" tun6to4 |
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134 | |
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135 | # Add default route, if device matches |
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136 | if [ "$IPV6_DEFAULTDEV" = "tun6to4" ]; then |
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137 | if [ -n "$IPV6_DEFAULTGW" ]; then |
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138 | echo $"Warning: interface 'tun6to4' does not support 'IPV6_DEFAULTGW', ignored" |
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139 | fi |
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140 | ipv6_set_default_route $ipv6to4_relay tun6to4 |
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141 | fi |
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142 | |
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143 | # Add static routes |
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144 | if [ -f /etc/sysconfig/static-routes-ipv6 ]; then |
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145 | LC_ALL=C grep -w "^tun6to4" /etc/sysconfig/static-routes-ipv6 | while read device network gateway; do |
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146 | if [ -z "$network" ]; then |
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147 | continue |
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148 | fi |
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149 | if [ -z "$gateway" ]; then |
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150 | gateway="$ipv6to4_relay" |
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151 | fi |
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152 | ipv6_add_route $network $gateway tun6to4 |
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153 | done |
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154 | fi |
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155 | |
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156 | # Setup additional static IPv6 routes (newer config style) |
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157 | if [ -f "/etc/sysconfig/network-scripts/route6-tun6to4" ]; then |
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158 | cat "/etc/sysconfig/network-scripts/route6-tun6to4" | sed 's/#.*//g' | grep -v '^[[:space:]]*$' | while read line; do |
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159 | if echo "$line" | grep -vq 'via'; then |
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160 | # Add gateway if missing |
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161 | line="$line via $ipv6to4_relay" |
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162 | fi |
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163 | ipv6_exec_ip -6 route add $line |
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164 | done |
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165 | fi |
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166 | |
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167 | # Cleanup autmatically generated autotunnel (not needed for 6to4) |
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168 | ipv6_del_route "::/96" "::" tun6to4 |
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169 | ipv6_del_addr_on_device tun6to4 "::$ipv4addr/128" |
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170 | |
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171 | if [ "$IPV6_CONTROL_RADVD" = "yes" ]; then |
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172 | # Control running radvd |
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173 | ipv6_trigger_radvd up "$IPV6_RADVD_TRIGGER_ACTION" $IPV6_RADVD_PIDFILE |
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174 | |
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175 | if [ -n "$IPV6TO4_ROUTING" ]; then |
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176 | # Generate 6to4 address |
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177 | ipv6to4prefix="`ipv6_create_6to4_prefix $ipv4addr`" |
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178 | if [ -n "$ipv6to4prefix" ]; then |
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179 | # Add IPv6 address to interface (required interface route will be set automatically) |
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180 | for devsuf in $IPV6TO4_ROUTING; do |
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181 | dev="`echo $devsuf | awk -F- '{ print $1 }'`" |
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182 | suf="`echo $devsuf | awk -F- '{ print $2 }'`" |
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183 | ipv6_add_addr_on_device ${dev} ${ipv6to4prefix}${suf} |
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184 | done |
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185 | else |
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186 | echo $"Error occured while calculating the IPv6to4 prefix" |
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187 | fi |
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188 | else |
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189 | echo $"radvd control enabled, but config is not complete" |
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190 | fi |
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191 | fi |
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192 | fi |
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193 | fi |
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