package/network/ipv6/ipv6-support/files/support.sh

   1 #!/bin/sh
   2 # Copyright (c) 2012 OpenWrt.org
   3 . /lib/functions.sh
   4 . /lib/functions/service.sh
   5 . /lib/functions/network.sh
   6
   7 config_load network6
   8
   9
  10 conf_get() {
  11         local __return="$1"
  12         local __device="$2"
  13         local __option="$3"
  14         local __value=$(cat "/proc/sys/net/ipv6/conf/$device/$option")
  15         eval "$__return=$__value"
  16 }
  17
  18
  19 conf_set() {
  20         local device="$1"
  21         local option="$2"
  22         local value="$3"
  23         echo "$value" > "/proc/sys/net/ipv6/conf/$device/$option"
  24 }
  25
  26
  27 stop_service() {
  28         local __exe="$1"
  29         SERVICE_PID_FILE="$2"
  30         local __return="$3"
  31
  32         service_check "$__exe" && {
  33                 service_stop "$__exe"
  34                 [ -n "$__return" ] && eval "$__return=1"
  35         }
  36         rm -f "$SERVICE_PID_FILE"
  37 }
  38
  39
  40 start_service() {
  41         local cmd="$1"
  42         local pidfile="$2"
  43
  44         SERVICE_DAEMONIZE=1
  45         SERVICE_WRITE_PID=1
  46         SERVICE_PID_FILE="$pidfile"
  47         service_start $cmd
  48 }
  49
  50
  51 resolve_network_add() {
  52         local __section="$1"
  53         local __device="$2"
  54         local __return="$3"
  55
  56         local __cdevice
  57         network_get_device __cdevice "$__section"
  58         [ "$__cdevice" != "$__device" ] && return
  59
  60         eval "$__return"'="'"$__section"'"'
  61 }
  62
  63
  64 resolve_network() {
  65         local __return="$1"
  66         local __device="$2"
  67         config_foreach resolve_network_add interface "$__device" "$__return"
  68 }
  69
  70
  71 announce_prefix() {
  72         local prefix="$1"
  73         local network="$2"
  74         local cmd="$3"
  75
  76         local addr=$(echo "$prefix" | cut -d/ -f1)
  77         local rem=$(echo "$prefix" | cut -d/ -f2)
  78         local length=$(echo "$rem" | cut -d, -f1)
  79         local prefer=""
  80         local valid=""
  81
  82         # If preferred / valid provided
  83         [ "$rem" != "$length" ] && {
  84                 prefer=$(echo "$rem" | cut -d, -f2)
  85                 valid=$(echo "$rem" | cut -d, -f3)
  86         }
  87
  88         local msg='{"network": "'"$network"'", "prefix": "'"$addr"'", "length": '"$length"
  89         [ -n "$valid" ] && msg="$msg"', "valid": '"$valid"', "preferred": '"$prefer"
  90         [ -z "$cmd" ] && cmd=newprefix
  91
  92         ubus call 6distributed "$cmd" "$msg}"
  93 }
  94
  95
  96 disable_router() {
  97         local network="$1"
  98
  99         # Notify the address distribution daemon
 100         ubus call 6distributed deliface '{"network": "'"$network"'"}'
 101
 102         # Disable advertisement daemon
 103         stop_service /usr/sbin/6relayd "/var/run/ipv6-router-$network.pid"
 104 }
 105
 106
 107 restart_relay_slave() {
 108         local __section="$1"
 109         local __master="$2"
 110
 111         network_is_up "$__section" || return
 112
 113         local __device=""
 114         network_get_device __device "$__section"
 115
 116         local __cmaster=""
 117         config_get __cmaster "$__section" relay_master
 118
 119         [ "$__master" == "$__cmaster" ] && {
 120                 disable_interface "$__section"
 121                 enable_interface "$__section" "$__device"
 122         }
 123 }
 124
 125
 126 add_relay_slave() {
 127         local __section="$1"
 128         local __return="$2"
 129         local __master="$3"
 130         local __mode="$4"
 131
 132         network_is_up "$__section" || return
 133
 134         # Get device
 135         local __device=""
 136         network_get_device __device "$__section"
 137
 138         # Match master network
 139         local __cmaster=""
 140         config_get __cmaster "$__section" relay_master
 141         [ "$__master" == "$__cmaster" ] || return
 142
 143         # Test slave  mode
 144         local __cmode=""
 145         config_get __cmode "$__section" mode
 146         [ "$__cmode" == "downstream" ] && __cmode="router"
 147
 148         # Don't start fallback interfaces if we are in forced-relay mode
 149         [ "$__cmode" == "relay" -o "$__mode" == "fallback" ] || return
 150
 151         # Don't make non-relay or non-router interfaces slaves
 152         [ "$__cmode" == "relay" -o "$__cmode" == "router" ] || return
 153
 154         # Disable any active distribution
 155         [ "$__cmode" == "router" ] && disable_router "$__section"
 156
 157         eval "$__return"'="$'"$__return"' '"$__device"'"'
 158 }
 159
 160
 161 stop_relay() {
 162         local network="$1"
 163         local pid_fallback="/var/run/ipv6-relay-fallback-$network.pid"
 164         local pid_forced="/var/run/ipv6-relay-forced-$network.pid"
 165         local was_fallback=""
 166
 167         stop_service /usr/sbin/6relayd "$pid_fallback" was_fallback
 168         stop_service /usr/sbin/6relayd "$pid_forced"
 169
 170         # Reenable normal distribution on slave interfaces
 171         [ -n "$was_fallback" ] && config_foreach restart_relay_slave interface "$network"
 172 }
 173
 174
 175 detect_forced_relay_mode() {
 176         local __section="$1"
 177         local __mode="$2"
 178
 179         local __cmode
 180         config_get __cmode "$__section" mode
 181         [ "$__cmode" == "relay" ] && eval "$__mode=forced"
 182 }
 183
 184
 185 restart_relay() {
 186         local network="$1"
 187         local mode="$2"
 188
 189         # Stop last active relay
 190         stop_relay "$network"
 191
 192         # Detect if we have a forced-relay
 193         [ -z "$mode" ] && config_foreach detect_forced_relay_mode interface mode
 194
 195         # Don't start without a mode
 196         [ -z "$mode" ] && return
 197
 198         # Detect master device
 199         local device=""
 200         network_get_device device "$network"
 201
 202         # Generate command string
 203         local cmd="/usr/sbin/6relayd -A $device"
 204         local ifaces=""
 205         config_foreach add_relay_slave interface ifaces "$network" "$mode"
 206
 207         # Start relay
 208         local pid="/var/run/ipv6-relay-$mode-$network.pid"
 209         [ -n "$ifaces" ] && start_service "$cmd $ifaces" "$pid"
 210
 211         # There are no slave interface, however indicate that we want to relay
 212         [ -z "$ifaces" ] && touch "$pid"
 213 }
 214
 215
 216 restart_master_relay() {
 217         local network="$1"
 218         local mode="$2"
 219         local pid_fallback="/var/run/ipv6-relay-fallback-$network.pid"
 220         local pid_forced="/var/run/ipv6-relay-forced-$network.pid"
 221
 222         # Disable active relaying to this interface
 223         config_get relay_master "$network" relay_master
 224         [ -z "$relay_master" ] && return
 225         network_is_up "$relay_master" || return
 226
 227         # Detect running mode
 228         [ -z "$mode" && -f "$pid_fallback" ] && mode="fallback"
 229         [ -z "$mode" && -f "$pid_forced" ] && mode="forced"
 230
 231         # Restart relay if running or start requested
 232         [ -n "$mode" ] && restart_relay "$relay_master" "$mode"
 233 }
 234
 235
 236 disable_interface() {
 237         local network="$1"
 238
 239         # Delete all prefixes routed to this interface
 240         ubus call 6distributed delprefix '{"network": "'"$network"'"}'
 241
 242         # Restart Relay
 243         restart_master_relay "$network"
 244
 245         # Disable distribution
 246         disable_router "$network"
 247
 248         # Disable relay
 249         stop_relay "$network"
 250
 251         # Disable DHCPv6 client if enabled, state script will take care
 252         stop_service /usr/sbin/odhcp6c "/var/run/ipv6-dhcpv6-$network.pid"
 253 }
 254
 255
 256 enable_static() {
 257         local network="$1"
 258         local device="$2"
 259
 260         # Enable global forwarding
 261         local global_forward
 262         conf_get global_forward all forwarding
 263         [ "$global_forward" != "1" ] && conf_set all forwarding 1
 264
 265         # Configure device
 266         conf_set "$device" accept_ra 1
 267         conf_set "$device" forwarding 1
 268
 269         # ULA-integration
 270         local ula_prefix=""
 271         config_get ula_prefix "$network" ula_prefix
 272
 273         # ULA auto configuration (first init)
 274         [ "$ula_prefix" == "auto" ] && {
 275                 local r1=""
 276                 local r2=""
 277                 local r3=""
 278
 279                 # Sometimes results are empty, therefore try until it works...
 280                 while [ -z "$r1" -o -z "$r2" -o -z "$r3" ]; do
 281                         r1=$(printf "%02x" $(($(</dev/urandom tr -dc 0-9 | dd bs=9 count=1) % 256)))
 282                         r2=$(printf "%01x" $(($(</dev/urandom tr -dc 0-9 | dd bs=9 count=1) % 65536)))
 283                         r3=$(printf "%01x" $(($(</dev/urandom tr -dc 0-9 | dd bs=9 count=1) % 65536)))
 284                 done
 285
 286                 ula_prefix="fd$r1:$r2:$r3::/48"
 287
 288                 # Save prefix so it will be preserved across reboots
 289                 uci set network6.$network.ula_prefix=$ula_prefix
 290                 uci commit network6
 291         }
 292
 293         # Announce ULA
 294         [ -n "$ula_prefix" ] && announce_prefix $ula_prefix $network
 295
 296         # Announce all static prefixes
 297         config_list_foreach "$network" static_prefix announce_prefix $network
 298
 299         # start relay if there are forced relay members
 300         restart_relay "$network"
 301 }
 302
 303
 304 enable_router() {
 305         local network="$1"
 306         local device="$2"
 307
 308         # Get IPv6 prefixes
 309         local length
 310         config_get length "$network" advertise_prefix
 311         [ -z "$length" ] && length=64
 312         [ "$length" -ne "0" ] && ubus call 6distributed newiface '{"network": "'"$network"'", "iface": "'"$device"'", "length": '"$length"'}'
 313
 314         # Start RD & DHCPv6 service
 315         local pid="/var/run/ipv6-router-$network.pid"
 316         start_service "/usr/sbin/6relayd -Rserver -Dserver . $device" "$pid"
 317
 318         # Try relaying if necessary
 319         restart_master_relay "$network"
 320 }
 321
 322
 323 enable_dhcpv6() {
 324         local network="$1"
 325         local device="$2"
 326
 327         # Configure device
 328         conf_set "$device" accept_ra 2
 329         conf_set "$device" forwarding 2
 330
 331         # Trigger RS
 332         conf_set "$device" disable_ipv6 1
 333         conf_set "$device" disable_ipv6 0
 334
 335         # Configure DHCPv6-client
 336         local dhcp6_opts="$device"
 337
 338         # Configure DHCPv6-client (e.g. requested prefix)
 339         local request_prefix
 340         config_get request_prefix "$network" request_prefix
 341         [ -z "$request_prefix" ] && request_prefix="auto"
 342         [ "$request_prefix" != "no" ] && {
 343                 [ "$request_prefix" == "auto" ] && request_prefix=0
 344                 dhcp6_opts="-P$request_prefix $dhcp6_opts"
 345         }
 346
 347         # Start DHCPv6 client
 348         local pid="/var/run/ipv6-dhcpv6-$network.pid"
 349         start_service "/usr/sbin/odhcp6c -s/lib/ipv6/dhcpv6.sh $dhcp6_opts" "$pid"
 350
 351         # Refresh RA on all interfaces
 352         for pid in /var/run/ipv6-router-*.pid; do
 353                 kill -SIGUSR1 $(cat "$pid")
 354         done
 355 }
 356
 357
 358 enable_interface()
 359 {
 360         local network="$1"
 361         local device="$2"
 362         local mode=""
 363         config_get mode "$network" mode
 364
 365         # Compatibility with old mode names
 366         [ "$mode" == "downstream" ] && mode=router
 367         [ "$mode" == "upstream" ] && mode=dhcpv6
 368
 369         # Run mode startup code
 370         [ "$mode" == "dhcpv6" -o "$mode" == "static" ] && enable_static "$network" "$device"
 371         [ "$mode" == "dhcpv6" ] && enable_dhcpv6 "$network" "$device"
 372         [ "$mode" == "router" ] && enable_router "$network" "$device"
 373         [ "$mode" == "relay" ] && restart_master_relay "$network" forced
 374 }