From a145ddda284570e57413e37f025c3657205e17d8 Mon Sep 17 00:00:00 2001 From: "David Kaspar [Dee'Kej]" Date: Fri, 25 May 2018 20:01:54 +0200 Subject: Repository scheme updated to new layout NOTE: This commit just moves files around, without actually fixing the Makefiles and specfile. See follow up commits which resolve this. --- network-scripts/network-functions-ipv6 | 1084 ++++++++++++++++++++++++++++++++ 1 file changed, 1084 insertions(+) create mode 100644 network-scripts/network-functions-ipv6 (limited to 'network-scripts/network-functions-ipv6') diff --git a/network-scripts/network-functions-ipv6 b/network-scripts/network-functions-ipv6 new file mode 100644 index 00000000..b5b3e939 --- /dev/null +++ b/network-scripts/network-functions-ipv6 @@ -0,0 +1,1084 @@ +# network-functions-ipv6 +# +# Taken from: network-functions-ipv6 +# (P) & (C) 1997-2005 by Peter Bieringer +# +# You will find more information on the initscripts-ipv6 homepage at +# http://www.deepspace6.net/projects/initscripts-ipv6.html +# +# Version: 2006-08-03 +# +# + + +##### Test for IPv6 capabilities +# $1: (optional) testflag: currently supported: "testonly" (do not load a module) +# return code: 0=ok 2=IPv6 test fails +ipv6_test() { + local fn="ipv6_test" + + local testflag=$1 + + if ! [ -f /proc/net/if_inet6 ]; then + if [ "$testflag" = "testonly" ]; then + return 2 + else + modprobe ipv6 + + if ! [ -f /proc/net/if_inet6 ]; then + return 2 + fi + fi + fi + + if ! [ -d /proc/sys/net/ipv6/conf/ ]; then + return 2 + fi + + return 0 +} + +##### Static IPv6 route configuration + +# Set static IPv6 route +# $1: : to route +# $2: : over which $1 should be routed (if "::", gw will be skipped) +# $3: [] : (optional) +# return code: 0=ok 1=argument error 2=IPv6 test fails 3=major problem adding route +ipv6_add_route() { + local fn="ipv6_add_route" + + local networkipv6=$1 + local gatewayipv6=$2 + local device=$3 # maybe empty + + if [ -z "$networkipv6" ]; then + net_log $"Missing parameter 'IPv6-network' (arg 1)" err $fn + return 1 + fi + + if [ -z "$gatewayipv6" ]; then + net_log $"Missing parameter 'IPv6-gateway' (arg 2)" err $fn + return 1 + fi + + ipv6_test || return 2 + + ipv6_test_ipv6_addr_valid $networkipv6 || return 2 + ipv6_test_ipv6_addr_valid $gatewayipv6 || return 2 + + if [ -z "$device" ]; then + local returntxt="$(/sbin/ip -6 route add $networkipv6 via $gatewayipv6 metric 1 2>&1)" + else + if [ "$gatewayipv6" = "::" ]; then + local returntxt="$(/sbin/ip -6 route add $networkipv6 dev $device metric 1 2>&1)" + else + local returntxt="$(/sbin/ip -6 route add $networkipv6 via $gatewayipv6 dev $device metric 1 2>&1)" + fi + fi + + if [ -n "$returntxt" ]; then + if echo $returntxt | LC_ALL=C grep -q "File exists"; then + # Netlink: "File exists" + true + elif echo $returntxt | LC_ALL=C grep -q "No route to host"; then + # Netlink: "No route to host" + net_log $"'No route to host' adding route '$networkipv6' via gateway '$gatewayipv6' through device '$device'" err $fn + return 3 + else + net_log $"Unknown error" err $fn + return 3 + fi + fi + + return 0 +} + +##### automatic tunneling configuration + +## Configure automatic tunneling up +# return code: 0=ok 2=IPv6 test fails 3=major problem +ipv6_enable_autotunnel() { + local fn="ipv6_enable_autotunnel" + + ipv6_test || return 2 + + # enable IPv6-over-IPv4 tunnels + if ipv6_test_device_status sit0; then + true + else + # bring up basic tunnel device + /sbin/ip link set sit0 up + + if ! ipv6_test_device_status sit0; then + net_log $"Tunnel device 'sit0' enabling didn't work" err $fn + return 3 + fi + + # Set sysctls proper (regardless "default") + /sbin/sysctl -e -w net.ipv6.conf.sit0.forwarding=1 >/dev/null 2>&1 + /sbin/sysctl -e -w net.ipv6.conf.sit0.accept_ra=0 >/dev/null 2>&1 + /sbin/sysctl -e -w net.ipv6.conf.sit0.accept_redirects=0 >/dev/null 2>&1 + fi + + return 0 +} + +##### Interface configuration + +## Add an IPv6 address for given interface +# $1: +# $2: +# return code: 0=ok 1=argument error 2=IPv6 test fails 3=major problem +ipv6_add_addr_on_device() { + local fn="ipv6_add_addr_on_device" + + local device=$1 + local address=$2 + + if [ -z "$device" ]; then + net_log $"Missing parameter 'device' (arg 1)" err $fn + return 1 + fi + + if [ -z "$address" ]; then + net_log $"Missing parameter 'IPv6-address' (arg 2)" err $fn + return 1 + fi + + ipv6_test || return 2 + + ipv6_test_ipv6_addr_valid $address || return 1 + + ipv6_test_device_status $device + local result=$? + + if [ "$result" = "0" ]; then + true + elif [ "$result" != "11" ]; then + net_log $"Device '$device' doesn't exist" err $fn + return 3 + else + /sbin/ip link set $device up + + if ! ipv6_test_device_status $device; then + net_log $"Device '$device' enabling didn't work" err $fn + return 3 + fi + fi + + # Extract address parts + local prefixlength_implicit="$(echo $address | awk -F/ '{ print $2 }')" + local address_implicit="${address%%/*}" + + # Check prefix length and using '64' as default + if [ -z "$prefixlength_implicit" ]; then + local prefixlength_implicit="64" + local address="$address_implicit/$prefixlength_implicit" + fi + + /sbin/ip -6 addr replace $address dev $device + local result=$? + + if [ $result -eq 2 ]; then + return 0 + elif [ $result -ne 0 ]; then + net_log $"Cannot add IPv6 address '$address' on dev '$device'" err $fn + return 3 + fi + + return 0 +} + + +## Remove all IPv6 routes and addresses on given interface (cleanup to prevent kernel crashes) +# $1: +# return code: 0=ok 1=argument error 2=IPv6 test fails 3=major problem +ipv6_cleanup_device() { + local fn="ipv6_cleanup_device" + + local device=$1 + + if [ -z "$device" ]; then + net_log $"Missing parameter 'device' (arg 1)" err $fn + return 1 + fi + + ipv6_test testonly || return 2 + + # Remove all IPv6 routes through this device (but not "lo") + if [ "$device" != "lo" ]; then + /sbin/ip -6 route flush dev $device scope global >/dev/null 2>&1 + /sbin/ip -6 route flush dev $device scope site >/dev/null 2>&1 + fi + + # Remove all IPv6 addresses on this interface + /sbin/ip -6 addr flush dev $device scope global >/dev/null 2>&1 + /sbin/ip -6 addr flush dev $device scope site >/dev/null 2>&1 + + return 0 +} + + +## Remove all IPv6 6to4 related routes and addresses on given interface +# $1: +# return code: 0=ok 1=argument error 2=IPv6 test fails 3=major problem +ipv6_cleanup_6to4_device() { + local fn="ipv6_cleanup_6to4_device" + + local device=$1 + + if [ -z "$device" ]; then + net_log $"Missing parameter 'device' (arg 1)" err $fn + return 1 + fi + + ipv6_test testonly || return 2 + + # Cleanup 6to4 addresses on this device + /sbin/ip -6 addr show dev $device scope global permanent | awk '/\/ && $2 ~ /^2002:/ { print $2 }' | while read addr; do + /sbin/ip -6 addr del ${addr} dev ${device} + done + + # Get all IPv6 routes through given interface related to 6to4 and remove them + /sbin/ip -6 route show dev $device | LC_ALL=C grep "^2002:" | while read ipv6net dummy; do + /sbin/ip -6 route del $ipv6net dev $device + done + + return 0 +} + + +##### Some address test functions + +## Test a given IPv6 address for validity +# $1: +# return code: 0=ok 1=not valid +ipv6_test_ipv6_addr_valid() { + ipcalc -cs6 $1 +} + + +## Test a given IPv4 address for validity +# $1: +# return code: 0=ok 1=not valid +ipv6_test_ipv4_addr_valid() { + ipcalc -cs4 $1 +} + + +## Test a given IPv4 address for not a private but unicast one +# $1: +# return code: 0=ok 1=argument error 10=private or not unicast +ipv6_test_ipv4_addr_global_usable() { + local fn="ipv6_test_ipv4_addr_global_usable" + + local testipv4addr_globalusable=$1 + + + if [ -z "$testipv4addr_globalusable" ]; then + return 1 + fi + + # Test for a globally usable IPv4 address now + # test 0.0.0.0/8 + /bin/ipcalc --network $testipv4addr_globalusable 255.0.0.0 | LC_ALL=C grep -q "NETWORK=0\.0\.0\.0" && return 10 + # test 10.0.0.0/8 (RFC 1918 / private) + /bin/ipcalc --network $testipv4addr_globalusable 255.0.0.0 | LC_ALL=C grep -q "NETWORK=10\.0\.0\.0" && return 10 + # test 127.0.0.0/8 (loopback) + /bin/ipcalc --network $testipv4addr_globalusable 255.0.0.0 | LC_ALL=C grep -q "NETWORK=127\.0\.0\.0" && return 10 + # test 169.254.0.0/16 (APIPA / DHCP link local) + /bin/ipcalc --network $testipv4addr_globalusable 255.255.0.0 | LC_ALL=C grep -q "NETWORK=169\.254\.0\.0" && return 10 + # test 172.16.0.0/12 (RFC 1918 / private) + /bin/ipcalc --network $testipv4addr_globalusable 255.240.0.0 | LC_ALL=C grep -q "NETWORK=172\.16\.0\.0" && return 10 + # test 192.168.0.0/16 (RFC 1918 / private) + /bin/ipcalc --network $testipv4addr_globalusable 255.255.0.0 | LC_ALL=C grep -q "NETWORK=192\.168\.0\.0" && return 10 + # test 224.0.0.0/3 (multicast and reserved, broadcast) + /bin/ipcalc --network $testipv4addr_globalusable 224.0.0.0 | LC_ALL=C grep -q "NETWORK=224\.0\.0\.0" && return 10 + + return 0 +} + + +## Test a given device for status +# $1: +# return code: 0=ok 1=argument error 10=not exists 11=down +ipv6_test_device_status() { + local fn="ipv6_test_device_status" + + local device=$1 + + if [ -z "$device" ]; then + net_log $"Missing parameter 'device' (arg 1)" err $fn + return 1 + fi + + # Test if device exists + if [ ! -d "/sys/class/net/${device}" ]; then + # not exists + return 10 + fi + + # Test if device is up + if /sbin/ip link show dev $device 2>/dev/null | LC_ALL=C grep -q "UP"; then + # up + return 0 + else + # down + return 11 + fi +} + + +## Create 6to4 prefix +# $1: +# stdout: <6to4address> +# return code: 0=ok 1=argument error +ipv6_create_6to4_prefix() { + local fn="ipv6_create_6to4_prefix" + + local ipv4addr=$1 + + if [ -z "$ipv4addr" ]; then + net_log $"Missing parameter 'IPv4 address' (arg 1)" err $fn + fi + + local major1="${ipv4addr%%.*}" + local minor1="$(echo $ipv4addr | awk -F. '{ print $2 }')" + local major2="$(echo $ipv4addr | awk -F. '{ print $3 }')" + local minor2="$(echo $ipv4addr | awk -F. '{ print $4 }')" + + if [ -z "$major1" -o -z "$minor1" -o -z "$major2" -o -z "$minor2" ]; then + return 1 + fi + + if [ $major1 -eq 0 ]; then + local block1="$(printf "%x" $minor1)" + else + local block1="$(printf "%x%02x" $major1 $minor1)" + fi + if [ $major2 -eq 0 ]; then + local block2="$(printf "%x" $minor2)" + else + local block2="$(printf "%x%02x" $major2 $minor2)" + fi + + local prefix6to4="2002:$block1:$block2" + + echo "$prefix6to4" + return 0 +} + + +## Check and create 6to4 tunnel relay address +# $1: +# stdout: +# return code: 0=ok 1=argument error +ipv6_create_6to4_relay_address() { + local fn="ipv6_create_6to4_relay_address" + + local addr=$1 + + if [ -z "$addr" ]; then + net_log $"Missing parameter 'address' (arg 1)" err $fn + return 1 + fi + + # Check + if ipv6_test_ipv4_addr_valid $addr ; then + # ok, an IPv4 one + if ipv6_test_ipv4_addr_global_usable $addr; then + # IPv4 globally usable + local ipv6to4_relay="::$addr" + else + net_log $"Given address '$addr' is not a global IPv4 one (arg 1)" err $fn + return 1 + fi + else + net_log $"Given address '$addr' is not a valid IPv4 one (arg 1)" err $fn + return 1 + fi + + echo "$ipv6to4_relay" + + return 0 +} + + +##### 6to4 tunneling setup + +## Configure 6to4 tunneling up +# $1: : only "tun6to4" is supported +# $2: : global IPv4 address of interface (will be used to generate 6to4 prefix) +# $3: [] : for 6to4 prefix (optional, default is "::1") +# $4: [] : MTU of tunnel device (optional, default is automatic) +# $5: [] : local IPv4 address of tunnel interface (required in case of 6to4 behind NAT) +# return code: 0=ok 1=argument error 2=IPv6 test fails 3=major problem +ipv6_add_6to4_tunnel() { + local fn="ipv6_add_6to4_tunnel" + + local device=$1 + local globalipv4=$2 + local globalipv6to4suffix=$3 + local mtu=$4 + local localipv4=$5 + + if [ -z "$device" ]; then + net_log $"Missing parameter 'device' (arg 1)" err $fn + return 1 + fi + + if [ -z "$globalipv4" ]; then + net_log $"Missing parameter 'global IPv4 address' (arg 2)" err $fn + return 1 + fi + + # Check device + if [ "$device" != "tun6to4" ]; then + net_log $"Given device '$device' is not supported (arg 1)" err $fn + return 1 + fi + + # Copy global IPv4 address to local if last one is not given + if [ -z "$localipv4" ]; then + localipv4="$globalipv4" + fi + + ipv6_test || return 2 + + # Generate 6to4 address + local prefix6to4="$(ipv6_create_6to4_prefix $globalipv4)" + if [ $? -ne 0 -o -z "$prefix6to4" ]; then + return 3 + fi + + if [ -z "$globalipv6to4suffix" ]; then + local address6to4="${prefix6to4}::1/16" + else + local address6to4="${prefix6to4}::${globalipv6to4suffix}/16" + fi + + ipv6_add_tunnel_device tun6to4 0.0.0.0 $address6to4 $localipv4 + if [ $? -ne 0 ]; then + local retval=3 + else + local retval=0 + fi + + # Add unspecific unreachable route for local 6to4 address space + /sbin/ip route add unreach ${prefix6to4}::/48 + + # Set MTU, if given + if [ -n "$mtu" ]; then + ipv6_set_mtu $device $mtu + fi + + return $retval +} + + +## Configure all 6to4 tunneling down +# $1: : only "tun6to4" is supported +# return code: 0=ok 1=argument error 2=IPv6 test fails 3=major problem +ipv6_cleanup_6to4_tunnels() { + local fn="ipv6_cleanup_6to4_tunnels" + + local device=$1 + + if [ -z "$device" ]; then + net_log $"Missing parameter 'device' (arg 1)" err $fn + return 1 + fi + + # Check device + if [ "$device" != "tun6to4" ]; then + net_log $"Given device '$device' is not supported (arg 1)" err $fn + return 1 + fi + + ipv6_test testonly || return 2 + + ipv6_del_tunnel_device tun6to4 + + # Remove all unspecific unreachable routes for local 6to4 address space + /sbin/ip -6 route | LC_ALL=C grep "^unreachable 2002:.*/48 dev lo" | while read token net rest; do + /sbin/ip route del unreach $net + done + + return 0 +} + + +## Configure 6to4 tunneling down +# $1: : only "tun6to4" is supported +# $2: : global address of local interface +# return code: 0=ok 1=argument error 2=IPv6 test fails 3=major problem +ipv6_del_6to4_tunnel() { + local fn="ipv6_del_6to4_tunnel" + + local device=$1 + local localipv4=$2 + + if [ -z "$device" ]; then + net_log $"Missing parameter 'device' (arg 1)" err $fn + return 1 + fi + + if [ -z "$localipv4" ]; then + net_log $"Missing parameter 'local IPv4 address' (arg 2)" err $fn + return 1 + fi + + # Check device + if [ "$device" != "tun6to4" ]; then + net_log $"Given device '$device' is not supported (arg 1)" err $fn + return 1 + fi + + ipv6_test || return 2 + + ipv6_del_tunnel_device tun6to4 + local retval=$? + + # Remove unspecific unreachable route for local 6to4 address space + /sbin/ip route del unreach ${prefix6to4}::/48 + + return $retval +} + + +## Configure a static tunnel device up +# $1: +# $2: : of foreign tunnel +# $3: [] : local one of a P-t-P tunnel (optional) +# $4: [] : local one of tunnel (optional) +# return code: 0=ok 1=argument error 2=IPv6 test fails 3=major problem +ipv6_add_tunnel_device() { + local fn="ipv6_add_tunnel_device" + + local device=$1 + local addressipv4tunnel=$2 + local addressipv6local=$3 + local addressipv4tunnellocal=$4 + + if [ -z "$device" ]; then + net_log $"Missing parameter 'device' (arg 1)" err $fn + return 1 + fi + + if [ -z "$addressipv4tunnel" ]; then + net_log $"Missing parameter 'IPv4-tunnel address' (arg 2)" err $fn + return 1 + fi + + if [ -z "$addressipv4tunnellocal" ]; then + local addressipv4tunnellocal="any" + fi + + ipv6_test || return 2 + + if ! ipv6_test_device_status $device; then + local ttldefault="$(/sbin/sysctl -e net.ipv4.ip_default_ttl | awk '{ print $3 }')" + if [ -z "$ttldefault" ]; then + local ttldefault=64 + fi + + # Test whether remote IPv4 address was already applied to another tunnel + if [ "$addressipv4tunnel" != "0.0.0.0" -a "$addressipv4tunnel" != "any" ]; then + /sbin/ip tunnel show remote $addressipv4tunnel 2>/dev/null | LC_ALL=C grep -w "ipv6/ip" | while IFS=":" read devnew rest; do + if [ "$devnew" != "$device" ]; then + net_log $"Given remote address '$addressipv4tunnel' on tunnel device '$device' is already configured on device '$devnew'" err $fn + return 3 + fi + done + fi + + /sbin/ip tunnel add $device mode sit ttl $ttldefault remote $addressipv4tunnel local $addressipv4tunnellocal + if [ $? -ne 0 ]; then + return 3 + fi + + # Test, whether "ip tunnel show" reports valid content + if ! /sbin/ip tunnel show $device 2>/dev/null | LC_ALL=C grep -q -w "remote"; then + net_log $"Tunnel device '$device' creation didn't work" err $fn + return 3 + fi + + /sbin/ip link set $device up + + if ! ipv6_test_device_status $device; then + net_log $"Tunnel device '$device' bringing up didn't work" err $fn + return 3 + fi + + # Set sysctls proper (regardless "default") + /sbin/sysctl -e -w net.ipv6.conf.$SYSCTLDEVICE.forwarding=1 >/dev/null 2>&1 + /sbin/sysctl -e -w net.ipv6.conf.$SYSCTLDEVICE.accept_ra=0 >/dev/null 2>&1 + /sbin/sysctl -e -w net.ipv6.conf.$SYSCTLDEVICE.accept_redirects=0 >/dev/null 2>&1 + + if [ -n "$addressipv6local" ]; then + # Setup P-t-P address + ipv6_add_addr_on_device $device $addressipv6local + if [ $? -ne 0 ]; then + return 3 + fi + fi + else + false + fi + + return 0 +} + + +## Configure a static tunnel device down +# $1: +# return code: 0=ok 1=argument error 2=IPv6 test fails 3=major problem +ipv6_del_tunnel_device() { + local fn="ipv6_del_tunnel_device" + + local device=$1 + + if [ -z "$device" ]; then + net_log $"Missing parameter 'device' (arg 1)" err $fn + return 1 + fi + + ipv6_test testonly || return 2 + + if ipv6_test_device_status $device; then + ipv6_cleanup_device $device + else + if [ "$device" != "sit0" ]; then + false + fi + fi + + if [ "$device" != "sit0" ]; then + if /sbin/ip tunnel show $device 2>/dev/null | LC_ALL=C grep -q -w "ipv6/ip"; then + /sbin/ip tunnel del $device + + if ipv6_test_device_status $device; then + return 3 + fi + else + false + fi + fi + + return 0 +} + + +## Cleanup all dedicated tunnel devices +ipv6_cleanup_tunnel_devices() { + local fn="ipv6_cleanup_tunnel_devices" + + ipv6_test testonly || return 2 + + # Find still existing tunnel devices and shutdown and delete them + + /sbin/ip tunnel show | awk -F: '/\/ { print $1 }' | while read device; do + ipv6_del_tunnel_device $device + done + + return 0 +} + + +## Get address of a dedicated tunnel +# $1: +# $2: local|remote : local or remote address +# stdout: if available +# return code: 0=ok 1=argument error 2=IPv6 test fails 3=major problem +ipv6_get_ipv4addr_of_tunnel() { + local fn="ipv6_get_local_ipv4_of_tunnel" + + local device=$1 + local selection=$2 + + if [ -z "$device" ]; then + net_log $"Missing parameter 'device' (arg 1)" err $fn + return 1 + fi + + if [ -z "$selection" ]; then + net_log $"Missing parameter 'selection' (arg 2)" err $fn + return 1 + fi + if [ "$selection" != "local" -a "$selection" != "remote" ]; then + net_log $"Unsupported selection '$selection' specified (arg 2)" err $fn + return 1 + fi + + ipv6_test testonly || return 2 + + ipv6_test_device_status $device + + if [ $? != 0 -a $? != 11 ]; then + # Device doesn't exist + return 3 + fi + + # Device exists, retrieve address + if [ "$selection" = "local" ]; then + local tunnel_local_ipv4addr="$(/sbin/ip tunnel show $device | awk '{ print $6 }')" + elif [ "$selection" = "remote" ]; then + local tunnel_local_ipv4addr="$(/sbin/ip tunnel show $device | awk '{ print $4 }')" + fi + + if [ $? != 0 ]; then + return 3 + fi + + if [ "$tunnel_local_ipv4addr" = "any" ]; then + local tunnel_local_ipv4addr="0.0.0.0" + fi + + echo "$tunnel_local_ipv4addr" + + return 0 +} + + +## Get IPv4 address of a device +# $1: +# stdout: if available +# return code: 0=ok 1=argument error 2=IPv6 test fails 3=major problem (more than one IPv4 address applied) +ipv6_get_ipv4addr_of_device() { + local fn="ipv6_get_ipv4addr_of_device" + + local device=$1 + + if [ -z "$device" ]; then + net_log $"Missing parameter 'device' (arg 1)" err $fn + return 1 + fi + + ipv6_test_device_status $device + + if [ $? != 0 -a $? != 11 ]; then + # Device doesn't exist + return 3 + fi + + # Device exists, retrieve the first address only + local ipv4addr="$(/sbin/ip -o -4 addr show dev $device | awk '{ print $4 }' | awk -F/ '{ print $1; exit }')" + + if [ $? != 0 ]; then + return 3 + fi + + if [ "$ipv4addr" = "any" ]; then + local ipv4addr="0.0.0.0" + fi + + echo "$ipv4addr" + + return 0 +} + + +## Set IPv6 MTU for a device +# $1: +# $2: +# return code: 0=ok 1=argument error 2=IPv6 test fails 3=major problem +ipv6_set_mtu() { + local fn="ipv6_set_mtu" + + local device=$1 + local ipv6_mtu=$2 + + if [ -z "$device" ]; then + net_log $"Missing parameter 'device' (arg 1)" err $fn + return 1 + fi + + if [ -z "$ipv6_mtu" ]; then + net_log $"Missing parameter 'IPv6 MTU' (arg 2)" err $fn + return 1 + fi + + # Check range + if [ $ipv6_mtu -lt 1280 -o $ipv6_mtu -gt 65535 ]; then + net_log $"Given IPv6 MTU '$ipv6_mtu' is out of range" err $fn + return 1 + fi + + ipv6_test testonly || return 2 + + # Set value + /sbin/ip link set dev $device mtu $ipv6_mtu + + return 0 +} + + +## Set a default route +# $1: : gateway, can also contain scope suffix (device name), cause a warning if not matching with $2 (but will have precedence) +# $2: : gateway device (optional in case of $1 is a global address or $1 contains scope suffix) +# $3: : (optional) device to check scope and gateway device against (setup is skipped, if not matching) +# return code: 0=ok 1=argument error 2=IPv6 test fails 3=major problem +ipv6_set_default_route() { + local fn="ipv6_set_default_route" + + local address=$1 + local device=$2 + local device_check=$3 + + ipv6_test testonly || return 2 + + # Map the unspecified address to nothing + if [ "$address" = "::" ]; then + local address="" + fi + + if [ -n "$address" ]; then + local addressgw=${address%%%*} + local device_scope=$(echo $address | awk -F% '{ print $2 }') + + if [ -z "$addressgw" ]; then + net_log $"Given IPv6 default gateway '$address' is not in proper format" err $fn + return 3 + fi + + # Scope device has precedence + if [ -n "$device_scope" -a -n "$device" -a "$device_scope" != "$device" ]; then + net_log $"Given IPv6 default gateway '$address' has scope '$device_scope' defined, given default gateway device '$device' will be not used" info $fn + local device="" + fi + + # Link local addresses require a device + if echo $addressgw | LC_ALL=C grep -qi "^fe80:"; then + if [ -z "$device_scope" ]; then + if [ -z "$device" ]; then + net_log $"Given IPv6 default gateway '$address' is link-local, but no scope or gateway device is specified" err $fn + return 3 + fi + fi + fi + + # Check whether the route belongs to the specific given interface + if [ -n "$device_check" ]; then + # Check whether scope device matches given check device + if [ -n "$device_scope" -a "$device_check" != "$device_scope" ]; then + # scope device != specific given -> skip + return 0 + elif [ -n "$device" -a "$device_check" != "$device" ]; then + # gateway device != specific given -> skip + return 0 + fi + fi + + # Set device now, if not given + if [ -z "$device" ]; then + local device="$device_scope" + fi + + if [ -z "$device" ]; then + # Note: this can cause a warning and a not installed route, if given address is not reachable on the link + ipv6_add_route ::/0 $addressgw + else + ipv6_add_route ::/0 $addressgw $device + fi + elif [ -n "$device" ]; then + # Check whether the route belongs to the specific given interface + if [ -n "$device_check" -a "$device_check" != "$device" ]; then + # gateway device != specific given -> skip + return 0 + fi + + ipv6_test_route_requires_next_hop $device + local result=$? + + if [ $result = 0 ]; then + net_log $"Given IPv6 default device '$device' requires an explicit nexthop" err $fn + return 3 + elif [ $result != 10 ]; then + net_log $"Given IPv6 default device '$device' doesn't exist or isn't up" err $fn + return 3 + fi + + ipv6_add_route ::/0 :: $device + else + net_log $"No parameters given to setup a default route" err $fn + return 3 + fi + + return 0 +} + + +## Resolve need of explicit next hop for an interface +# $1: +# return code: 0=ok 1=argument error 2=IPv6 test fails 3=major problem 10=needs no explicit hop +ipv6_test_route_requires_next_hop() { + local fn="ipv6_test_route_requires_next_hop" + + local device=$1 + + if [ -z "$device" ]; then + net_log $"Missing parameter 'device' (arg 1)" err $fn + return 1 + fi + + ipv6_test testonly || return 2 + + ipv6_test_device_status $device + + if [ $? != 0 ]; then + return 3 + fi + + if [ "$device" = "sit0" ]; then + return 10 + fi + + if /sbin/ip -o link show $device 2>/dev/null | LC_ALL=C grep -q "POINTOPOINT"; then + return 10 + fi + + return 0 +} + + +## Trigger radvd +# $1: up|down : device reason for triggering (coming up or going down) +# $2: [startstop|restart|reload|SIGHUP] : triger mechanism (default is "SIGHUP") +# "startstop" : reason=up -> start, reason=down -> stop +# $3: [] : alternative pid file [optional] +# return code: 0=ok 1=argument error 2=IPv6 test fails 3=major problem +ipv6_trigger_radvd() { + local fn="ipv6_trigger_radvd" + + local reason=$1 + local mechanism=$2 + local pidfile=$3 + + if [ -z "$reason" ]; then + net_log $"No reason given for sending trigger to radvd" err $fn + return 1 + fi + + if [ "$reason" != "up" -a "$reason" != "down" ]; then + net_log $"Unsupported reason '$reason' for sending trigger to radvd" err $fn + return 1 + fi + + if [ -z "$mechanism" ]; then + # Take default + local mechanism="SIGHUP" + fi + + if [ -z "$pidfile" ]; then + local pidfile="/run/radvd/radvd.pid" + fi + + # Print message and select action + case $mechanism in + 'startstop') + case $reason in + up) + local action="start" + ;; + down) + local action="stop" + ;; + esac + ;; + 'reload'|'restart'|'SIGHUP') + local action="$mechanism" + ;; + *) + net_log $"Unsupported mechanism '$mechanism' for sending trigger to radvd" err $fn + return 3 + ;; + esac + + # PID file needed? + if [ "$action" = "SIGHUP" ]; then + if ! [ -f "$pidfile" ]; then + if [ "$reason" = "down" ]; then + # be quiet because triggering may have been disabled + true + else + net_log $"Given pidfile '$pidfile' doesn't exist, cannot send trigger to radvd" err $fn + fi + return 3 + fi + + # Get PID + local pid="$(cat $pidfile)" + if [ -z "$pid" ]; then + # pidfile empty - strange + net_log $"Pidfile '$pidfile' is empty, cannot send trigger to radvd" err $fn + return 3 + fi + fi + + + # Do action + case $action in + 'SIGHUP') + kill -HUP $pid + ;; + 'reload'|'restart'|'stop'|'start') + if ! /sbin/chkconfig --list radvd >/dev/null 2>&1; then + if [ "$reason" = "down" ]; then + # be quiet because triggering may have been disabled + true + else + net_log $"radvd not (properly) installed, triggering failed" err $fn + fi + return 3 + else + /sbin/service radvd $action >/dev/null 2>&1 + fi + ;; + *) + # Normally not reached, "action" is set above to proper value + ;; + esac + + return 0 +} + +#https://www.vaspects.com/2013/12/11/services-dont-bind-to-ipv6-address/ +ipv6_wait_tentative() { + local fn="ipv6_wait_tentative" + local device=$1 + local countdown=30 + local ip_output="" + + if [ -z "$device" ]; then + net_log $"Missing parameter 'device' (arg 1)" err $fn + return 1 + fi + + [ "$device" = lo ] && return 0 + + while [ ${countdown} -gt 0 ]; do + ip_output="$(ip -6 addr show dev ${device} scope global tentative)" + + if [ -z "$ip_output" ]; then + return 0; + elif echo "$ip_output" | grep "dadfailed" > /dev/null; then + net_log $"Duplicate Address Detection: Duplicate addresses detected" err $fn + net_log $"Duplicate Address Detection: Please, fix your network configuration" err $fn + return 1 + fi + + net_log $"Waiting for interface ${device} IPv6 address(es) to leave the 'tentative' state" info $fn + sleep 1 + countdown=$(($countdown - 1)) + done + + ip_output="$(ip -6 addr show dev ${device} scope global tentative)" + + if [ -n "$ip_output" ]; then + net_log $"Some IPv6 address(es) of ${device} remain still in 'tentative' state" warning $fn + net_log $"Run 'ip -6 addr show dev ${device} scope global tentative' to see more" warning $fn + fi + + return 0 +} -- cgit v1.2.1