ipv6/radvd/files/radvd.init

   1 #!/bin/sh /etc/rc.common
   2 # Copyright (C) 2008  Alina Friedrichsen <x-alina@gmx.net>
   3 START=50
   4
   5 RADVD_INTERFACE_STRING_OPTIONS='MaxRtrAdvInterval MinRtrAdvInterval MinDelayBetweenRAs AdvLinkMTU AdvReachableTime AdvRetransTimer AdvCurHopLimit AdvDefaultLifetime AdvDefaultPreference HomeAgentLifetime HomeAgentPreference'
   6 RADVD_INTERFACE_BOOLEAN_OPTIONS='IgnoreIfMissing AdvSendAdvert UnicastOnly AdvManagedFlag AdvOtherConfigFlag AdvSourceLLAddress AdvHomeAgentFlag AdvHomeAgentInfo AdvMobRtrSupportFlag AdvIntervalOpt'
   7
   8 RADVD_PREFIX_STRING_OPTIONS='AdvValidLifetime AdvPreferredLifetime'
   9 RADVD_PREFIX_BOOLEAN_OPTIONS='AdvOnLink AdvAutonomous AdvRouterAddr'
  10
  11 RADVD_ROUTE_STRING_OPTIONS='AdvRouteLifetime AdvRoutePreference'
  12 RADVD_ROUTE_BOOLEAN_OPTIONS=''
  13
  14 RADVD_RDNSS_STRING_OPTIONS='AdvRDNSSPreference AdvRDNSSLifetime'
  15 RADVD_RDNSS_BOOLEAN_OPTIONS='AdvRDNSSOpen'
  16
  17 validate_varname() {
  18         local varname=$1
  19         [ -z "$varname" -o "$varname" != "${varname%%[!A-Za-z0-9_]*}" ] && return 1
  20         return 0
  21 }
  22
  23 validate_ifname() {
  24         local ifname=$1
  25         [ -z "$ifname" -o "$ifname" != "${ifname%%[!A-Za-z0-9.:_-]*}" ] && return 1
  26         return 0
  27 }
  28
  29 validate_ip6addr() {
  30         local ip6addr=$1
  31         [ -z "$ip6addr" -o "$ip6addr" != "${ip6addr%%[!A-Fa-f0-9.:]*}" ] && return 1
  32         return 0
  33 }
  34
  35 validate_ip6prefix() {
  36         local ip6prefix=$1
  37         [ -z "$ip6prefix" -o "$ip6prefix" != "${ip6prefix%%[!A-Fa-f0-9./:]*}" ] && return 1
  38         return 0
  39 }
  40
  41 validate_radvd_string() {
  42         local radvd_string=$1
  43         [ -z "$radvd_string" -o "$radvd_string" != "${radvd_string%%[!a-z0-9.:_-]*}" ] && return 1
  44         return 0
  45 }
  46
  47 get_ifname() {
  48         local interface=$1
  49         validate_varname "$interface" || return 1
  50         local cfgt
  51         local ifname
  52
  53         scan_interfaces
  54         config_get cfgt "$interface" TYPE
  55         [ "$cfgt" != "interface" ] && return 1
  56         config_get ifname "$interface" ifname
  57         validate_ifname "$ifname" || return 1
  58         printf '%s\n' "$ifname"
  59
  60         return 0
  61 }
  62
  63 get_ip6addr() {
  64         local ifname=$1
  65         local scope=$2
  66         local iproute2_scope
  67         local ifconfig_scope
  68         local ip6addr
  69
  70         case "$scope" in
  71                 host) iproute2_scope=host ifconfig_scope=Host;;
  72                 link) iproute2_scope=link ifconfig_scope=Link;;
  73                 site) iproute2_scope=site ifconfig_scope=Site;;
  74                 global) iproute2_scope=global ifconfig_scope=Global;;
  75                 "") get_ip6addr "$ifname" global || get_ip6addr "$ifname" site; return;;
  76                 *) return 1;;
  77         esac
  78
  79         ip6addr=$(LANG=C ip -f inet6 -- addr show dev "$ifname" 2> /dev/null | sed -n -e 's/^  *inet6 \([A-Fa-f0-9.:]*[/][0-9]*\) scope '"$iproute2_scope"' $/\1/p' | head -n 1)
  80         if [ -z "$ip6addr" ]; then
  81                 ip6addr=$(LANG=C ifconfig "$ifname" 2> /dev/null | sed -n -e 's/^  *inet6 addr: \([A-Fa-f0-9.:]*[/][0-9]*\) Scope:'"$ifconfig_scope"'$/\1/p' | tail -n 1)
  82                 [ -z "$ip6addr" ] && return 1
  83         fi
  84
  85         printf '%s\n' "$ip6addr"
  86
  87         return 0
  88 }
  89
  90 radvd_find_config_file() {
  91         local cfg=$1
  92         validate_varname "$cfg" || return 0
  93
  94         config_get_bool ignore "$cfg" ignore 0
  95         [ "$ignore" -ne 0 ] && return 0
  96         config_get RADVD_CONFIG_FILE "$cfg" config_file
  97
  98         return 0
  99 }
 100
 101 radvd_add_interface() {
 102         local cfg=$1
 103         validate_varname "$cfg" || return 0
 104         local ignore
 105         local interfaces
 106         local interface
 107         local list_interface
 108         local exist
 109
 110         config_get_bool ignore "$cfg" ignore 0
 111         [ "$ignore" -ne 0 ] && return 0
 112
 113         config_get interfaces "$cfg" interface
 114         for interface in $interfaces; do
 115                 validate_varname "$interface" || continue
 116                 exist=0
 117                 for list_interface in $RADVD_INTERFACES; do
 118                         [ "$interface" = "$list_interface" ] && exist=1
 119                 done
 120                 [ "$exist" -eq 0 ] && RADVD_INTERFACES="$RADVD_INTERFACES $interface"
 121         done
 122
 123         return 0
 124 }
 125
 126 radvd_write_interface() {
 127         local cfg=$1
 128         validate_varname "$cfg" || return 0
 129         local ignore
 130         local interfaces
 131         local interface
 132         local name
 133         local value
 134
 135         config_get_bool ignore "$cfg" ignore 0
 136         [ "$ignore" -ne 0 ] && return 0
 137
 138         config_get interfaces "$cfg" interface
 139         exist=0
 140         for interface in $interfaces; do
 141                 [ "$INTERFACE" = "$interface" ] && exist=1
 142         done
 143         [ "$exist" -eq 0 ] && return 0
 144
 145         for name in $RADVD_INTERFACE_STRING_OPTIONS; do
 146                 config_get value "$cfg" "$name"
 147                 validate_radvd_string "$value" || continue
 148                 printf '\t%s %s;\n' "$name" "$value"
 149         done
 150
 151         for name in $RADVD_INTERFACE_BOOLEAN_OPTIONS; do
 152                 config_get value "$cfg" "$name"
 153                 [ -z "$value" ] && continue
 154                 config_get_bool value "$cfg" "$name" 0
 155                 if [ "$value" -ne 0 ]; then
 156                         printf '\t%s on;\n' "$name"
 157                 else
 158                         printf '\t%s off;\n' "$name"
 159                 fi
 160         done
 161
 162         return 0
 163 }
 164
 165 radvd_write_prefix() {
 166         local cfg=$1
 167         validate_varname "$cfg" || return 0
 168         local ignore
 169         local interfaces
 170         local interface
 171         local prefixes
 172         local prefix
 173         local name
 174         local value
 175         local cfgt
 176
 177         config_get_bool ignore "$cfg" ignore 0
 178         [ "$ignore" -ne 0 ] && return 0
 179
 180         config_get interfaces "$cfg" interface
 181         exist=0
 182         for interface in $interfaces; do
 183                 [ "$INTERFACE" = "$interface" ] && exist=1
 184         done
 185         [ "$exist" -eq 0 ] && return 0
 186
 187         config_get prefixes "$cfg" prefix
 188         if [ -z "$prefixes" ]; then
 189                 prefixes=$(get_ip6addr "$IFNAME") || return 0
 190         fi
 191
 192         for prefix in $prefixes; do
 193                 validate_ip6prefix "$prefix" || continue
 194                 printf '\n\tprefix %s\n\t{\n' "$prefix"
 195
 196                 for name in $RADVD_PREFIX_STRING_OPTIONS; do
 197                         config_get value "$cfg" "$name"
 198                         validate_radvd_string "$value" || continue
 199                         printf '\t\t%s %s;\n' "$name" "$value"
 200                 done
 201
 202                 for name in $RADVD_PREFIX_BOOLEAN_OPTIONS; do
 203                         config_get value "$cfg" "$name"
 204                         [ -z "$value" ] && continue
 205                         config_get_bool value "$cfg" "$name" 0
 206                         if [ "$value" -ne 0 ]; then
 207                                 printf '\t\t%s on;\n' "$name"
 208                         else
 209                                 printf '\t\t%s off;\n' "$name"
 210                         fi
 211                 done
 212
 213                 config_get value "$cfg" Base6to4Interface
 214                 if [ -n "$value" ]; then
 215                         if ifname=$(get_ifname "$value"); then
 216                                 printf '\t\t%s %s;\n' "Base6to4Interface" "$ifname"
 217                         fi
 218                 fi
 219
 220                 printf '\t};\n'
 221         done
 222
 223         return 0
 224 }
 225
 226 radvd_write_route() {
 227         local cfg=$1
 228         validate_varname "$cfg" || return 0
 229         local ignore
 230         local interfaces
 231         local interface
 232         local prefixes
 233         local prefix
 234         local name
 235         local value
 236
 237         config_get_bool ignore "$cfg" ignore 0
 238         [ "$ignore" -ne 0 ] && return 0
 239
 240         config_get interfaces "$cfg" interface
 241         exist=0
 242         for interface in $interfaces; do
 243                 [ "$INTERFACE" = "$interface" ] && exist=1
 244         done
 245         [ "$exist" -eq 0 ] && return 0
 246
 247         config_get prefixes "$cfg" prefix
 248         for prefix in $prefixes; do
 249                 validate_ip6prefix "$prefix" || continue
 250                 printf '\n\troute %s\n\t{\n' "$prefix"
 251
 252                 for name in $RADVD_ROUTE_STRING_OPTIONS; do
 253                         config_get value "$cfg" "$name"
 254                         validate_radvd_string "$value" || continue
 255                         printf '\t\t%s %s;\n' "$name" "$value"
 256                 done
 257
 258                 for name in $RADVD_ROUTE_BOOLEAN_OPTIONS; do
 259                         config_get value "$cfg" "$name"
 260                         [ -z "$value" ] && continue
 261                         config_get_bool value "$cfg" "$name" 0
 262                         if [ "$value" -ne 0 ]; then
 263                                 printf '\t\t%s on;\n' "$name"
 264                         else
 265                                 printf '\t\t%s off;\n' "$name"
 266                         fi
 267                 done
 268
 269                 printf '\t};\n'
 270         done
 271
 272         return 0
 273 }
 274
 275 radvd_write_rdnss() {
 276         local cfg=$1
 277         validate_varname "$cfg" || return 0
 278         local ignore
 279         local interfaces
 280         local interface
 281         local addrs
 282         local addr
 283         local addr_list
 284         local name
 285         local value
 286         local i
 287
 288         config_get_bool ignore "$cfg" ignore 0
 289         [ "$ignore" -ne 0 ] && return 0
 290
 291         config_get interfaces "$cfg" interface
 292         exist=0
 293         for interface in $interfaces; do
 294                 [ "$INTERFACE" = "$interface" ] && exist=1
 295         done
 296         [ "$exist" -eq 0 ] && return 0
 297
 298         config_get addrs "$cfg" addr
 299         i=0
 300         for addr in $addrs; do
 301                 [ "$i" -ge 3 ] && break
 302                 validate_ip6addr "$addr" || continue
 303                 addr_list="$addr_list $addr"
 304                 i=$(($i+1))
 305         done
 306
 307         if [ -z "$addr_list" ]; then
 308                 addr=$(get_ip6addr "$IFNAME" link) || return 0
 309                 addr_list=" ${addr%%[/]*}"
 310         fi
 311
 312         printf '\n\tRDNSS%s\n\t{\n' "$addr_list"
 313
 314         for name in $RADVD_RDNSS_STRING_OPTIONS; do
 315                 config_get value "$cfg" "$name"
 316                 validate_radvd_string "$value" || continue
 317                 printf '\t\t%s %s;\n' "$name" "$value"
 318         done
 319
 320         for name in $RADVD_RDNSS_BOOLEAN_OPTIONS; do
 321                 config_get value "$cfg" "$name"
 322                 [ -z "$value" ] && continue
 323                 config_get_bool value "$cfg" "$name" 0
 324                 if [ "$value" -ne 0 ]; then
 325                         printf '\t\t%s on;\n' "$name"
 326                 else
 327                         printf '\t\t%s off;\n' "$name"
 328                 fi
 329         done
 330
 331         printf '\t};\n'
 332
 333         return 0
 334 }
 335
 336 radvd_write_config() {
 337         include /lib/network
 338
 339         RADVD_INTERFACES=
 340         config_foreach radvd_add_interface interface
 341         config_foreach radvd_add_interface prefix
 342         config_foreach radvd_add_interface route
 343         config_foreach radvd_add_interface RDNSS
 344
 345         for INTERFACE in $RADVD_INTERFACES; do
 346                 IFNAME=$(get_ifname "$INTERFACE") || continue
 347                 printf 'interface %s\n{\n' "$IFNAME"
 348                 config_foreach radvd_write_interface interface
 349                 config_foreach radvd_write_prefix prefix
 350                 config_foreach radvd_write_route route
 351                 config_foreach radvd_write_rdnss rdnss
 352                 printf '};\n\n'
 353         done
 354
 355         return 0
 356 }
 357
 358 start() {
 359         config_load radvd
 360
 361         RADVD_CONFIG_FILE=
 362         config_foreach radvd_find_config_file radvd
 363
 364         if [ -z "$RADVD_CONFIG_FILE" ]; then
 365                 mkdir -p -- /var/etc/
 366                 radvd_write_config > /var/etc/radvd.conf
 367                 if [ -s "/var/etc/radvd.conf" ]; then
 368                         RADVD_CONFIG_FILE=/var/etc/radvd.conf
 369                 fi
 370         fi
 371
 372         [ -z "$RADVD_CONFIG_FILE" ] && return 1
 373
 374         sysctl -w net.ipv6.conf.all.forwarding=1 > /dev/null 2> /dev/null
 375
 376         radvd -C "$RADVD_CONFIG_FILE" -m stderr_syslog -p /var/run/radvd.pid
 377 }
 378
 379 stop() {
 380         killall radvd
 381 }