[PATCH v10] Configure the Node a routable IPv6 ULA

[Adrian Schmutzler]

Signed-off-by: Christian Dresel <fff at chrisi01.de>
Signed-off-by: Adrian Schmutzler <freifunk at adrianschmutzler.de>
Signed-off-by: Tim Niemeyer <tim at tn-x.org>

Changes in v10:
- Replace zeros by :: in addresses
- Use ip addresses as selector for deletion

Changes in v9:
- Add '0:' to suffix
- Do not delete ip addresses with same prefix

Changes in v8:
- Do not delete new ip addresses (in case they don't differ)
- Fixed typo in br-mesh
- Fixed escape char in prefix

Changes in v7:
- Add EUI64 address
- Change ifconfig to ip

Changes in v6:
- Typo in echo
- Optimized sed

Changes in v5:
- Only apply if ula_prefix is not empty
- Remove escape sign from ula_prefix

Changes in v4:
- Optimized grep and sed

Changes in v3:
- Added route block
- Inverted condition in address block
- Changed if style to "grep -q"
- Added some quotes

Changes in v2:
- Rebased onto keyXchange v2 patchset v15
- correctly handle keyxchangev2data without reloading
- added some quotes
---
 .../fff/fff-hoods/files/usr/sbin/configurehood     | 37 ++++++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/src/packages/fff/fff-hoods/files/usr/sbin/configurehood b/src/packages/fff/fff-hoods/files/usr/sbin/configurehood
index c18474f..b7ad650 100755
--- a/src/packages/fff/fff-hoods/files/usr/sbin/configurehood
+++ b/src/packages/fff/fff-hoods/files/usr/sbin/configurehood
@@ -161,6 +161,43 @@ if [ -s /tmp/keyxchangev2data ]; then
 			fi
 		done
 
+		# now we load the prefix from the hoodfile and set this to br-mesh
+		json_select network
+		json_get_var prefix ula_prefix
+		# Set $prefix::MAC as IP
+		if [ -n "$prefix" ] ; then
+			prefix="$(echo "$prefix" | sed -e 's,\\,,')"
+			suffix="$(awk -F: '{ print "0:"$1$2":"$3$4":"$5$6 }' /sys/class/net/br-mesh/address)"
+			suffix_eui="$(awk -F: '{ printf("%02x%s:%sff:fe%s:%s%s\n", xor(("0x"$1),2), $2, $3, $4, $5, $6) }' /sys/class/net/br-mesh/address)"
+			addr="$(echo "$prefix" | sed -e 's,/,'$suffix'/,')"
+			echo $addr | grep -q "::" || addr="$(echo "$addr" | sed -e 's,:[0:]*:,::,')"
+			addr_eui="$(echo "$prefix" | sed -e 's,/,'$suffix_eui'/,')"
+			echo $addr_eui | grep -q "::" || addr_eui="$(echo "$addr_eui" | sed -e 's,:[0:]*:,::,')"
+			for ip in $(ip -6 addr show dev br-mesh | grep inet6 | grep -v -e " $addr" -e " $addr_eui" -e " fe80::" -e " fdff::" | cut -f6 -d " "); do
+				ip -6 addr del "$ip" dev br-mesh
+			done
+			if ! ( ip -6 addr show dev br-mesh | grep -q "$addr" ) ; then
+				ip -6 addr add "$addr" dev br-mesh
+				echo "Set ULA address to br-mesh: $addr"
+			else
+				echo "Address already set."
+			fi
+			# Set $prefix::link-local as IP
+			if ! ( ip -6 addr show dev br-mesh | grep -q "$addr_eui" ) ; then
+				ip -6 addr add "$addr_eui" dev br-mesh
+				echo "Set ULA EUI-64 address to br-mesh: $addr_eui"
+			else
+				echo "Address already set."
+			fi
+			if ! ( ip -6 route show dev br-mesh | grep -q "fc00::" ) ; then
+				ip -6 route add fc00::/7 via fe80::1 dev br-mesh
+				echo "Set ULA route to br-mesh."
+			else
+				echo "Route already set."
+			fi
+		fi
+		json_select ".." # back to root
+
 		echo "Loading wifi"
 		wifi
 
-- 
2.7.4