Add bird babel implementation

Signed-off-by: Fabian Bläse <fabian@blaese.de>

buildscript

@@ -22,7 +22,7 @@ ROUTINGREV="02b4dbfcb7b8f8b566940847d22d5a6f229d2e66"
 GLUONREV="12e41d0ff07ec54bbd67a31ab50d12ca04f2238c"
 
 OPENWRT_PKGS="gpioctl-sysfs libugpio fastd haserl micrond mtr bmon"
-ROUTING_PKGS="kmod-batman-adv batctl alfred babeld"
+ROUTING_PKGS="kmod-batman-adv batctl alfred babeld bird2"
 GLUON_PKGS="simple-tc uradvd"
 
 FFF_VARIANTS="node layer3"

src/packages/fff/fff-babel-bird2/Makefile

@@ -0,0 +1,30 @@
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=fff-babel-bird2
+PKG_RELEASE:=1
+
+include $(INCLUDE_DIR)/package.mk
+
+define Package/fff-babel-bird2
+	SECTION:=base
+	CATEGORY:=Freifunk
+	TITLE:=Freifunk-Franken babel-bird2
+	URL:=https://www.freifunk-franken.de
+	DEPENDS:=+bird2 +bird2c
+	PROVIDES:=fff-babel-implementation
+	CONFLICTS:=fff-babeld
+endef
+
+define Package/fff-babel-bird2/description
+	This is the Freifunk Franken Firmware babel-bird2 package.
+endef
+
+define Build/Compile
+	# nothing
+endef
+
+define Package/fff-babel-bird2/install
+	$(CP) ./files/* $(1)/
+endef
+
+$(eval $(call BuildPackage,fff-babel-bird2))

src/packages/fff/fff-babel-bird2/files/etc/bird-babel-include.conf

@@ -0,0 +1 @@
+include "/etc/bird-babel/*.conf";

src/packages/fff/fff-babel-bird2/files/etc/bird-fff.conf

@@ -0,0 +1,115 @@
+# router id is not required for babeld, but necessary for bird startup
+router id 192.0.2.0;
+
+ipv4 table fff4;
+ipv6 sadr table fff6;
+
+ipv4 table local4;
+ipv6 sadr table local6;
+
+protocol device {
+	scan time 15;
+}
+
+# device routes for ipv4 peering address
+protocol direct {
+	ipv4 {
+		table fff4;
+		import filter {
+			if (net ~ 10.50.0.0/16 || net ~ 10.83.0.0/16) && net.len = 32 then {
+				accept;
+			}
+			reject;
+		};
+	};
+}
+
+# device routes on loopback interface
+protocol direct {
+	ipv4 {
+		table fff4;
+		import filter {
+			if net ~ 10.50.0.0/16 || net ~ 10.83.0.0/16 then {
+				accept;
+			}
+			reject;
+		};
+	};
+
+	ipv6 sadr {
+		table fff6;
+		import filter {
+			if net ~ 2000::/3 from ::/0 then {
+				accept;
+			}
+			reject;
+		};
+		import keep filtered;
+	};
+
+	interface "lo";
+}
+
+# ipv6 kernel route interface
+protocol kernel {
+	ipv6 sadr {
+		table fff6;
+		import filter {
+			# only import routes from kernel with proto static
+			if krt_source = 4 then {
+				accept;
+			}
+			reject;
+		};
+		export all;
+		preference 200;
+	};
+	kernel table 10;
+	scan time 15;
+	learn yes;
+}
+
+# ipv4 kernel route interface
+protocol kernel {
+	ipv4 {
+		table fff4;
+		import filter {
+			# only import routes from kernel with proto static
+			if krt_source = 4 then {
+				accept;
+			}
+			reject;
+		};
+		export all;
+		preference 200;
+	};
+	kernel table 10;
+	scan time 15;
+	learn yes;
+}
+
+protocol babel {
+	# required due to static configuration of global router id.
+	# also improves reconnect speed after restart.
+	randomize router id yes;
+
+	ipv4 {
+		table fff4;
+		import filter {
+			accept;
+		};
+		export all;
+	};
+
+	ipv6 sadr {
+		table fff6;
+		import filter {
+			accept;
+		};
+		export filter {
+			accept;
+		};
+	};
+
+	include "/etc/bird-babel-include.conf";
+};

src/packages/fff/fff-babel-bird2/files/etc/uci-defaults/60-fff-bird-config

@@ -0,0 +1,3 @@
+mv /etc/bird-fff.conf /etc/bird.conf
+
+exit 0

src/packages/fff/fff-babel-bird2/files/lib/functions/fff/babeldaemon

@@ -0,0 +1,53 @@
+babel_add_interface() {
+	[ "$#" -ne "4" ] && return 1
+
+	local name="$1"
+	local interface="$2"
+	local type="$3"
+	local rxcost="$4"
+
+	mkdir -p /tmp/bird-babel
+	echo "interface \"$interface\" { type $type; rxcost $rxcost; };" > /tmp/bird-babel/$name.conf
+
+	return 0
+}
+
+babel_delete_interface() {
+	return 0
+}
+
+babel_add_redistribute_filter() {
+	return 0
+}
+
+babel_remove_custom_redistribute_filters() {
+	return 0
+}
+
+babel_apply() {
+	# error output hidden because apply might be executed without a preceding configure step.
+	if [ -d /tmp/bird-babel ]; then
+		rm -rf /etc/bird-babel
+		mv /tmp/bird-babel /etc/bird-babel
+	fi
+
+	return 0
+}
+
+babel_reload() {
+	# Change include file path, so bird uses the correct configuration, depending on the configuration state:
+	#  - If test mode is active (and /tmp/bird-babel exists), switch to the temporary (/tmp) configuration to be tested.
+	#  - If new settings are applied or the old settings are restored after an unsuccessful test (and /tmp/bird-babel does not exist),
+	#    switch back to the permanent configuration (/etc).
+	if [ -d /tmp/bird-babel ]; then
+		echo 'include "/tmp/bird-babel/*.conf";' > /etc/bird-babel-include.conf
+	else
+		echo 'include "/etc/bird-babel/*.conf";' > /etc/bird-babel-include.conf
+	fi
+
+	/etc/init.d/bird reload
+}
+
+babel_revert() {
+	rm -r /tmp/bird-babel
+}

src/packages/fff/fff-babel-bird2/files/usr/lib/nodewatcher.d/80-bird2.sh

@@ -0,0 +1,13 @@
+#!/bin/sh
+
+set -e
+set -o pipefail
+
+neighbours="$(birdc -r show babel neighbors |
+		tail -n +5 |
+		awk '{ printf "<neighbour><ip>%s</ip><outgoing_interface>%s</outgoing_interface><link_cost>%s</link_cost></neighbour>", $1, $2, $3 }'
+	)"
+
+echo -n "<babel_neighbours>$neighbours</babel_neighbours>"
+
+exit 0

src/packages/fff/fff-layer3/Makefile

@@ -12,6 +12,7 @@ define Package/fff-layer3
 	URL:=https://www.freifunk-franken.de
 	DEPENDS:=+fff-alfred-monitoring-proxy \
 	         +fff-babel \
+	         +fff-babel-bird2 \
 	         +fff-boardname \
 	         +fff-dhcp \
 	         +fff-layer3-config \

src/packages/fff/fff-nodewatcher/files/usr/lib/nodewatcher.d/10-systemdata.sh

@@ -74,6 +74,8 @@ fi
 
 if [ -x /usr/sbin/babeld ]; then
 	SYSTEM_DATA="$SYSTEM_DATA<babel_version>$(/usr/sbin/babeld -V 2>&1)</babel_version>"
+elif [ -x /usr/sbin/bird ]; then
+	SYSTEM_DATA="$SYSTEM_DATA<babel_version>$(/usr/sbin/bird --version 2>&1 | sed "s/BIRD version /bird-/")</babel_version>"
 fi
 
 # example for /etc/openwrt_release: