split tinc-up into library

lib/cidr.bash

@@ -0,0 +1,20 @@
+mask2cidr() {
+  local netmask=$1
+  local nbits=0
+  IFS=.
+  for dec in "$netmask"; do
+    case $dec in
+      255) let nbits+=8;;
+      254) let nbits+=7;;
+      252) let nbits+=6;;
+      248) let nbits+=5;;
+      240) let nbits+=4;;
+      224) let nbits+=3;;
+      192) let nbits+=2;;
+      128) let nbits+=1;;
+      0);;
+      *) die "Error: $dec is not recognised"
+    esac
+  done
+  echo "$nbits"
+}

lib/core.bash

@@ -0,0 +1,12 @@
+has() {
+  command -v "$1" >/dev/null 2>&1
+}
+
+die() {
+  echo $1 &>2
+  exit 1
+}
+
+warn() {
+  echo $1 &>2
+}

lib/dhcp.bash

@@ -0,0 +1,30 @@
+start_dhclient() {
+  local interface=$1
+  if [[ "$OSTYPE" == "linux-gnu"  ]]; then
+    dhclient -x
+    dhclient -nw "$interface"
+  elif [[ "$OSTYPE" == "freebsd"* ]]; then
+    # prefer isc-dhcp-client as it supports dhcpv6
+    if [[ -x /usr/local/sbin/dhclient ]]; then
+      /usr/local/sbin/dhclient -x
+      /usr/local/sbin/dhclient -nw "$interface"
+    else
+      dhclient -b "$interface"
+    fi
+  else
+    nohup setsid dhclient "$interface" >/dev/null 2>&1
+  fi
+}
+
+start_dhcp() {
+  local interface=$1
+  if has dhcpcd; then
+    dhcpcd -b -n "$interface"
+  elif has dhclient; then
+    start_dhclient "$interface"
+  elif [[ "$OSTYPE" == "darwin"* ]]; then # TODO untested
+    ipconfig set "$interface" DHCP
+  else
+    die "no suitable dhcp program found, need dhcpcd or dhclient"
+  fi
+}

lib/ip.bash

@@ -0,0 +1,39 @@
+format_ip6_from_mac(){
+  local template=$1
+  IFS=':'; set $2; unset IFS
+  printf "$template" 0x${3} 0x${4} 0x${5} 0x${6}
+}
+
+add_ip6(){
+  local interface=$1
+  local ip=$2
+  local prefixlen=$3
+  if has ifconfig; then
+    if [[ "$OSTYPE" == "linux-gnu" ]]; then
+      ifconfig "$interface" inet6 del "$ip/$prefixlen" || true
+      ifconfig "$interface" inet6 add "$ip/$prefixlen"
+    else
+      ifconfig "$interface" inet6 del "$ip" prefixlen "$prefixlen" || true
+      ifconfig "$interface" inet6 add "$ip" prefixlen "$prefixlen"
+    fi
+  elif has ip; then
+    ip addr del "$ip/$prefixlen" dev "$interface" || true
+    ip addr add "$ip/$prefixlen" dev "$interface"
+  else
+    die "no suitable program found to configure the network interface, need iproute2 or ifconfig"
+  fi
+}
+
+add_ip4() {
+  local interface=$1
+  local ip=$2
+  local netmask=$3
+  if has ifconfig; then
+    ifconfig "$interface" "$ip" netmask "$netmask"
+  elif has ip; then
+    local cidr="$(mask2cidr $netmask)"
+    ip addr add "$ip/$cidr" dev "$interface"
+  else
+    die "no suitable program found to set ip address, need iproute2 or ifconfig"
+  fi
+}

lib/mac.bash

@@ -0,0 +1,24 @@
+set_mac() {
+  local interface=$1
+  local mac_address=$2
+  if has ifconfig; then
+    current_mac=$(ifconfig "$interface" | awk '/ether/ {print $2}')
+    if [[ "${current_mac,,}" == "${mac_address,,}" ]]; then
+      return
+    fi
+
+    ifconfig "$interface" down
+    if [[ "$OSTYPE" == "linux-gnu" ]]; then
+      ifconfig "$interface" hw ether "$mac_address"
+    else
+      ifconfig "$interface" ether "$mac_address"
+    fi
+    ifconfig "$interface" up
+  elif has ip; then
+    ip link set dev "$interface" down
+    ip link set dev "$interface" address "$mac_address"
+    ip link set dev "$interface" up
+  else
+    die "no suitable program found to configure the network interface, need iproute2 or ifconfig"
+  fi
+}

lib/route.bash

@@ -0,0 +1,57 @@
+add_route4() {
+  local interface="$1"
+  local subnet="$2"
+  local gateway="$3"
+  local netmask="$4"
+  local cidr="$(mask2cidr $netmask)"
+
+  if has route; then
+    if [[ "$OSTYPE" == "linux-gnu" ]]; then
+      route del -net "$subnet" "$gateway" netmask "$netmask" "$interface" || true
+      route add -net "$subnet" "$gateway" netmask "$netmask" "$interface"
+    else
+      route -n del -net "$subnet/$prefixlen" "$gateway" || true
+      route -n add -net "$subnet/$prefixlen" "$gateway"
+    fi
+  elif has ip; then
+    ip route del "$subnet/$cidr" via "$gateway" dev "$interface" || true
+    ip route add "$subnet/$cidr" via "$gateway" dev "$interface"
+  else
+    die "no suitable program found to set routes, need iproute2 or ifconfig"
+  fi
+}
+
+add_route6() {
+  local interface="$1"
+  local subnet="$2"
+  local gateway="$3"
+  local prefixlen="$4"
+
+  if has route; then
+    if [[ "$OSTYPE" == "linux-gnu" ]]; then
+      route del -A inet6 "$subnet/$prefixlen" gw "$gateway" "$interface" || true
+      route add -A inet6 "$subnet/$prefixlen" gw "$gateway" "$interface"
+    else
+      if [[ "$gateway" == fe80* ]]; then
+        gateway="$gateway%$interface"
+      fi
+      route -n add -inet6 "$network" "$gateway" -prefixlen "$prefixlen" || true
+      route -n add -inet6 "$network" "$gateway" -prefixlen "$prefixlen"
+    fi
+  elif has ip; then
+    ip route del "$subnet/$prefixlen" via "$gateway" dev "$interface" || true
+    ip route add "$subnet/$prefixlen" via "$gateway" dev "$interface"
+  else
+    die "no suitable program found to set routes, need iproute2 or ifconfig"
+  fi
+}
+
+set_route_policy(){
+  # TODO: other operating systems
+  if [[ "$OSTYPE" != "linux-gnu" ]]; then
+    return
+  fi
+  if !has ip; then
+    warn "Could not set source "
+  fi
+}

tinc-up

@@ -1,127 +1,42 @@
 #!/usr/bin/env bash
 set -eu
 
-has() {
+if [[ -n "${TINC_DEBUG+1}" ]]; then
-  command -v "$1" >/dev/null 2>&1
+  set -x
-}
-
-die() {
-  echo $1 &>2
-  exit 1
-}
-
-set_mac() {
-  local interface=$1
-  local mac_address=$2
-  if has ifconfig; then
-    current_mac=$(ifconfig "$interface" | awk '/ether/ {print $2}')
-    if [[ "${current_mac,,}" == "${mac_address,,}" ]]; then
-      return
 fi
 
-    ifconfig "$interface" down
+SCRIPT_DIR=$(cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd)
-    if [[ "$OSTYPE" == "linux-gnu" ]]; then
-      ifconfig "$interface" hw ether "$mac_address"
-    else
-      ifconfig "$interface" ether "$mac_address"
-    fi
-    ifconfig "$interface" up
-  elif has ip; then
-    ip link set dev "$interface" down
-    ip link set dev "$interface" address "$mac_address"
-    ip link set dev "$interface" up
-  else
-    die "no suitable program found to configure the network interface, need iproute2 or ifconfig"
-  fi
-}
 
-mask2cidr() {
+source "$SCRIPT_DIR/lib/core.bash"
-  local netmask=$1
+source "$SCRIPT_DIR/lib/cidr.bash"
-  local nbits=0
+source "$SCRIPT_DIR/lib/dhcp.bash"
-  IFS=.
+source "$SCRIPT_DIR/lib/ip.bash"
-  for dec in "$netmask"; do
+source "$SCRIPT_DIR/lib/mac.bash"
-    case $dec in
+source "$SCRIPT_DIR/lib/route.bash"
-      255) let nbits+=8;;
-      254) let nbits+=7;;
-      252) let nbits+=6;;
-      248) let nbits+=5;;
-      240) let nbits+=4;;
-      224) let nbits+=3;;
-      192) let nbits+=2;;
-      128) let nbits+=1;;
-      0);;
-      *) die "Error: $dec is not recognised"
-    esac
-  done
-  echo "$nbits"
-}
 
-set_ip() {
+#disable_ipv6_privacy() {
-  local interface=$1
+#  local interface=$1
-  local ip=$2
+#  if [[ "$OSTYPE" == "linux-gnu" ]]; then
-  local netmask=$3
+#    sysctl -w "net.ipv6.conf.${interface}.use_tempaddr=0"
-  if has ifconfig; then
+#  elif [[ "$OSTYPE" == "openbsd"* ]]; then
-    ifconfig "$interface" "$ip" netmask "$netmask"
+#    ifconfig "${interface}" -autoconfprivacy
-  elif has ip; then
+#  elif has sysctl; then
-    ip addr add "$ip" dev "$interface"
+#    sysctl -w net.inet6.ip6.use_tempaddr=0
-  else
+#  fi
-    die "no suitable program found to set ip address, need iproute2 or ifconfig"
+#}
-  fi
-}
-
-start_dhclient() {
-  local interface=$1
-  if [[ "$OSTYPE" == "linux-gnu"  ]]; then
-    dhclient -x
-    dhclient -nw "$interface"
-  elif [[ "$OSTYPE" == "freebsd"* ]]; then
-    # prefer isc-dhcp-client as it supports dhcpv6
-    if [[ -x /usr/local/sbin/dhclient ]]; then
-      /usr/local/sbin/dhclient -x
-      /usr/local/sbin/dhclient -nw "$interface"
-    else
-      dhclient -b "$interface"
-    fi
-  else
-    nohup setsid dhclient "$interface" >/dev/null 2>&1
-  fi
-}
-
-start_dhcp() {
-  local interface=$1
-  if has dhcpcd; then
-    dhcpcd -b -n "$interface"
-  elif has dhclient; then
-    start_dhclient "$interface"
-  elif [[ "$OSTYPE" == "darwin"* ]]; then # TODO untested
-    ipconfig set "$interface" DHCP
-  else
-    die "no suitable dhcp program found, need dhcpcd or dhclient"
-  fi
-}
-
-disable_ipv6_privacy() {
-  local interface=$1
-  if [[ "$OSTYPE" == "linux-gnu" ]]; then
-    sysctl -w "net.ipv6.conf.${interface}.use_tempaddr=0"
-  elif [[ "$OSTYPE" == "openbsd"* ]]; then
-    ifconfig "${interface}" -autoconfprivacy
-  elif has sysctl; then
-    sysctl -w net.inet6.ip6.use_tempaddr=0
-  fi
-}
 
 [ -z "${INTERFACE:-}" ] && die "no INTERFACE environment variable set"
 
-DIR=$(cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd)
+MAC_ADDRESS_FILE="${SCRIPT_DIR}/tinc-macaddr"
-MAC_ADDRESS_FILE="${DIR}/tinc-macaddr"
+LOCAL_HOOK_FILE="${SCRIPT_DIR}/tinc-up.local"
-LOCAL_HOOK_FILE="${DIR}/tinc-up.local"
+TINCRC="${SCRIPT_DIR}/tincrc"
-TINCRC="${DIR}/tincrc"
 
 MAC_ADDRESS=""
 SUBNET=""
 DHCP="yes"
-IPV6_PRIVACY="yes"
+ULA_IP6_TEMPLATE="fdc0:4992:6a6d:a:%x%x:%x%x::1"
+PUBLIC_IP6_PREFIX="2a01:4f8:210:31fd"
+PUBLIC_IP6_TEMPLATE="$PUBLIC_IP6_PREFIX:1:%x%x:%x%x:1"
 
 source "${TINCRC}" || true
 
@@ -132,20 +47,23 @@ if [ -z "$MAC_ADDRESS" ]; then
 fi
 
 set_mac "$INTERFACE" "$MAC_ADDRESS"
+public_ip6="$(format_ip6_from_mac $PUBLIC_IP6_TEMPLATE $MAC_ADDRESS)"
+ula_ip6="$(format_ip6_from_mac $ULA_IP6_TEMPLATE $MAC_ADDRESS)"
+add_ip6 "$INTERFACE" "$public_ip6" "80"
+add_ip6 "$INTERFACE" "$ula_ip6" "64"
+
+add_route6 "$INTERFACE" "fc00::" "fe80::1" "7"
+add_route6 "$INTERFACE" "fc00::" "fe80::1" "7"
 
 if [ -n "$SUBNET" ]; then
   IFS=' ' read ip netmask <<< "$SUBNET"
   [ -z "$ip" ] && die "no ip set in SUBNET"
   [ -z "$netmask" ] && die "no netmask set in SUBNET"
-  set_ip "$INTERFACE" "$ip" "$netmask"
+  add_ip4 "$INTERFACE" "$ip" "$netmask"
 fi
 
 if [ "${DHCP,,}" = "yes" ]; then
   start_dhcp "$INTERFACE"
 fi
 
-if [[ "${IPV6_PRIVACY,,}" != "yes" ]]; then
+[ -x "${SCRIPT_DIR}/tinc-up.local" ] && "${SCRIPT_DIR}/tinc-up.local" || true
-  disable_ipv6_privacy "$INTERFACE"
-fi
-
-[ -x "${DIR}/tinc-up.local" ] && "${DIR}/tinc-up.local" || true