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
  13 RADVD_RDNSS_STRING_OPTIONS='AdvRDNSSLifetime'
  14
  15 RADVD_DNSSL_STRING_OPTIONS='AdvDNSSLLifetime'
  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' "$name"
 159                 fi
 160         done
 161
 162         config_get clients "$cfg" client
 163         if [ -n "$clients" ]; then
 164                 printf '\n\tclients\n\t{\n'
 165
 166                 for client in $clients; do
 167                         validate_ip6addr "$client" || continue
 168                         printf '\t\t%s;\n' "$client"
 169                 done
 170
 171                 printf '\t};\n'
 172         fi
 173
 174         return 0
 175 }
 176
 177 radvd_write_prefix() {
 178         local cfg=$1
 179         validate_varname "$cfg" || return 0
 180         local ignore
 181         local interfaces
 182         local interface
 183         local prefixes
 184         local prefix
 185         local name
 186         local value
 187         local cfgt
 188
 189         config_get_bool ignore "$cfg" ignore 0
 190         [ "$ignore" -ne 0 ] && return 0
 191
 192         config_get interfaces "$cfg" interface
 193         exist=0
 194         for interface in $interfaces; do
 195                 [ "$INTERFACE" = "$interface" ] && exist=1
 196         done
 197         [ "$exist" -eq 0 ] && return 0
 198
 199         config_get prefixes "$cfg" prefix
 200         if [ -z "$prefixes" ]; then
 201                 prefixes=$(get_ip6addr "$IFNAME") || return 0
 202         fi
 203
 204         for prefix in $prefixes; do
 205                 validate_ip6prefix "$prefix" || continue
 206                 printf '\n\tprefix %s\n\t{\n' "$prefix"
 207
 208                 for name in $RADVD_PREFIX_STRING_OPTIONS; do
 209                         config_get value "$cfg" "$name"
 210                         validate_radvd_string "$value" || continue
 211                         printf '\t\t%s %s;\n' "$name" "$value"
 212                 done
 213
 214                 for name in $RADVD_PREFIX_BOOLEAN_OPTIONS; do
 215                         config_get value "$cfg" "$name"
 216                         [ -z "$value" ] && continue
 217                         config_get_bool value "$cfg" "$name" 0
 218                         if [ "$value" -ne 0 ]; then
 219                                 printf '\t\t%s on;\n' "$name"
 220                         else
 221                                 printf '\t\t%s off;\n' "$name"
 222                         fi
 223                 done
 224
 225                 config_get value "$cfg" Base6to4Interface
 226                 if [ -n "$value" ]; then
 227                         if ifname=$(get_ifname "$value"); then
 228                                 printf '\t\t%s %s;\n' "Base6to4Interface" "$ifname"
 229                         fi
 230                 fi
 231
 232                 printf '\t};\n'
 233         done
 234
 235         return 0
 236 }
 237
 238 radvd_write_route() {
 239         local cfg=$1
 240         validate_varname "$cfg" || return 0
 241         local ignore
 242         local interfaces
 243         local interface
 244         local prefixes
 245         local prefix
 246         local name
 247         local value
 248
 249         config_get_bool ignore "$cfg" ignore 0
 250         [ "$ignore" -ne 0 ] && return 0
 251
 252         config_get interfaces "$cfg" interface
 253         exist=0
 254         for interface in $interfaces; do
 255                 [ "$INTERFACE" = "$interface" ] && exist=1
 256         done
 257         [ "$exist" -eq 0 ] && return 0
 258
 259         config_get prefixes "$cfg" prefix
 260         for prefix in $prefixes; do
 261                 validate_ip6prefix "$prefix" || continue
 262                 printf '\n\troute %s\n\t{\n' "$prefix"
 263
 264                 for name in $RADVD_ROUTE_STRING_OPTIONS; do
 265                         config_get value "$cfg" "$name"
 266                         validate_radvd_string "$value" || continue
 267                         printf '\t\t%s %s;\n' "$name" "$value"
 268                 done
 269
 270                 printf '\t};\n'
 271         done
 272
 273         return 0
 274 }
 275
 276 radvd_write_rdnss() {
 277         local cfg=$1
 278         validate_varname "$cfg" || return 0
 279         local ignore
 280         local interfaces
 281         local interface
 282         local addrs
 283         local addr
 284         local addr_list
 285         local name
 286         local value
 287         local i
 288
 289         config_get_bool ignore "$cfg" ignore 0
 290         [ "$ignore" -ne 0 ] && return 0
 291
 292         config_get interfaces "$cfg" interface
 293         exist=0
 294         for interface in $interfaces; do
 295                 [ "$INTERFACE" = "$interface" ] && exist=1
 296         done
 297         [ "$exist" -eq 0 ] && return 0
 298
 299         config_get addrs "$cfg" addr
 300         i=0
 301         for addr in $addrs; do
 302                 [ "$i" -ge 3 ] && break
 303                 validate_ip6addr "$addr" || continue
 304                 addr_list="$addr_list $addr"
 305                 i=$(($i+1))
 306         done
 307
 308         if [ -z "$addr_list" ]; then
 309                 addr=$(get_ip6addr "$IFNAME" link) || return 0
 310                 addr_list=" ${addr%%[/]*}"
 311         fi
 312
 313         printf '\n\tRDNSS%s\n\t{\n' "$addr_list"
 314
 315         for name in $RADVD_RDNSS_STRING_OPTIONS; do
 316                 config_get value "$cfg" "$name"
 317                 validate_radvd_string "$value" || continue
 318                 printf '\t\t%s %s;\n' "$name" "$value"
 319         done
 320
 321         printf '\t};\n'
 322
 323         return 0
 324 }
 325
 326 radvd_write_dnssl() {
 327         local cfg=$1
 328         validate_varname "$cfg" || return 0
 329         local ignore
 330         local interfaces
 331         local interface
 332         local suffixes
 333         local suffix
 334         local suffix_list
 335         local name
 336         local value
 337
 338         config_get_bool ignore "$cfg" ignore 0
 339         [ "$ignore" -ne 0 ] && return 0
 340
 341         config_get interfaces "$cfg" interface
 342         exist=0
 343         for interface in $interfaces; do
 344                 [ "$INTERFACE" = "$interface" ] && exist=1
 345         done
 346         [ "$exist" -eq 0 ] && return 0
 347
 348         config_get suffixes "$cfg" suffix
 349         for suffix in $suffixes; do
 350                 validate_radvd_string "$suffix" || continue
 351                 suffix_list="$suffix_list $suffix"
 352         done
 353
 354         printf '\n\tDNSSL%s\n\t{\n' "$suffix_list"
 355
 356         for name in $RADVD_DNSSL_STRING_OPTIONS; do
 357                 config_get value "$cfg" "$name"
 358                 validate_radvd_string "$value" || continue
 359                 printf '\t\t%s %s;\n' "$name" "$value"
 360         done
 361
 362         printf '\t};\n'
 363
 364         return 0
 365 }
 366
 367 radvd_write_config() {
 368         include /lib/network
 369
 370         RADVD_INTERFACES=
 371         config_foreach radvd_add_interface interface
 372         config_foreach radvd_add_interface prefix
 373         config_foreach radvd_add_interface route
 374         config_foreach radvd_add_interface RDNSS
 375         config_foreach radvd_add_interface DNSSL
 376
 377         for INTERFACE in $RADVD_INTERFACES; do
 378                 IFNAME=$(get_ifname "$INTERFACE") || continue
 379                 printf 'interface %s\n{\n' "$IFNAME"
 380                 config_foreach radvd_write_interface interface
 381                 config_foreach radvd_write_prefix prefix
 382                 config_foreach radvd_write_route route
 383                 config_foreach radvd_write_rdnss rdnss
 384                 config_foreach radvd_write_dnssl dnssl
 385                 printf '};\n\n'
 386         done
 387
 388         return 0
 389 }
 390
 391 start() {
 392         config_load radvd
 393
 394         RADVD_CONFIG_FILE=
 395         config_foreach radvd_find_config_file radvd
 396
 397         if [ -z "$RADVD_CONFIG_FILE" ]; then
 398                 mkdir -p -- /var/etc/
 399                 radvd_write_config > /var/etc/radvd.conf
 400                 if [ -s "/var/etc/radvd.conf" ]; then
 401                         RADVD_CONFIG_FILE=/var/etc/radvd.conf
 402                 fi
 403         fi
 404
 405         [ -z "$RADVD_CONFIG_FILE" ] && return 1
 406
 407         sysctl -w net.ipv6.conf.all.forwarding=1 > /dev/null 2> /dev/null
 408
 409         radvd -C "$RADVD_CONFIG_FILE" -m stderr_syslog -p /var/run/radvd.pid
 410 }
 411
 412 stop() {
 413         killall radvd
 414 }