+#!/bin/sh /etc/rc.common
+
+# Copyright (C) 2014 - Eloi Carbó Solé (GSoC2014)
+# BGP/Bird integration with OpenWRT and QMP
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+
+BIRD="bird6"
+BIRD_CONFIG="/etc/$BIRD.conf"
+
+START=99
+STOP=10
+
+SERVICE_DAEMONIZE=1
+SERVICE_USE_PID=1
+SERVICE_PID_FILE="/var/run/$BIRD.pid"
+
+BIRD_BIN="/usr/sbin/$BIRD"
+
+
+# Function: writeToConfig $1
+# $1 string.
+# Allows to write in the $BIRD_CONFIG file, the string $1. This function does not check the $1 string.
+# Example: writeToConfig "value: $N"
+writeToConfig() {
+ echo "$1" >> $BIRD_CONFIG
+}
+
+# Function: write $1 $2
+# $1 string. $2 string.
+# This function checks if $2 is empty. If not, it writes the string $1 in the $BIRD_CONFIG file.
+# Use write function to check if $1, value found inside $2, is not empty and can be written in the configuration file.
+# Example:
+N=""; write "value: $N" $N;
+write() {
+ [ -n "$2" ] && writeToConfig "$1"
+}
+
+#Function: write_bool $1 $2
+# $1 string; $2 boolean
+# This function checks if $2 is true or false and write the $1 string into $BIRD_CONFIG file.
+# The function writes a # before the $2 string if its false.
+# Example: local N=0; write_bool $N
+write_bool() {
+ [ "$2" == 0 ] && writeToConfig "# $1;" || writeToConfig " $1;"
+}
+
+# Function: get $1 $2
+# $1 string. $2 string
+# This function uses the external UCI function "config_get $result $section $option" to obtain a string value from UCI config file.
+# To use this function, use the same name of the UCI option for the variable.
+# Example: UCI (option id 'abcd'); local id; get id $section
+get() {
+ config_get $1 $2 $1
+}
+
+# Function: get_bool $1 $2
+# $1 boolean. $2 string
+# This function uses the external UCI function "config_get_bool $result $section $option" to obtain a boolean value from UCI config file.
+# To use this function, use the same name of the UCI option for the variable $1.
+# Example: UCI (option use_ipv6 '1'); local use_ipv6; get use_ipv6 $section
+get_bool() {
+ config_get_bool $1 $2 $1
+}
+
+# Function: multipath_list $1
+# $1 string
+# This function writes the $1 string in the multipath routes.
+multipath_list() {
+ write " via $1" $1
+}
+
+# Function: prepare_tables $1
+# $1 string
+# This function gets each "table" section in the UCI configuration and sets each option in the bird6.conf file.
+# $1 is set as the ID of the current UCI table section
+prepare_tables() {
+ local section="$1"; local name
+ get name $section
+ write "table $name;" $name
+}
+
+# Function: prepare_global $1
+# $1 string
+# This function gets each "global" section in the UCI configuration and sets each option in the bird6.conf file.
+# $1 is set as the ID of the current UCI global section. prepare_global is the first configuration set in the bird6.conf and removes the old file.
+prepare_global () {
+ local section="$1"
+ local log_file; local log; local debug; local router_id; local table; local listen_bgp_addr; local listen_bgp_port; local listen_bgp_dual
+
+ # Remove old configuration file
+ rm -f "$BIRD_CONFIG"
+
+ get log_file $section
+ get log $section
+ get debug $section
+ get router_id $section
+ get table $section
+ get listen_bgp_addr $section
+ get listen_bgp_port $section
+ get listen_bgp_dual $section
+
+ # First line of the NEW configuration file
+ echo "#Bird6 configuration using UCI:" > $BIRD_CONFIG
+ writeToConfig " "
+ [ -n "$log_file" -a -n "$log" ] && writeToConfig 'log "'$log_file'" '$log';'
+ write "debug protocols $debug;" $debug
+ writeToConfig " "
+ writeToConfig "#Router ID"
+ write "router id $router_id;" $router_id
+ writeToConfig " "
+ writeToConfig "#Secondary tables"
+ config_foreach prepare_tables 'table'
+ if [ -n "$listen_bgp_dual" -o "$listen_bgp_dual" = "0" ]; then
+ writeToConfig "listen bgp $listen_bgp_addr $listen_bgp_port v6only;"
+ else
+ writeToConfig "listen bgp $listen_bgp_addr $listen_bgp_port dual;"
+ fi
+ writeToConfig " "
+}
+
+# Function: prepare_routes $1
+# $1 string
+# This function gets each "route" section in the UCI configuration and sets each option in the bird6.conf file.
+# $1 is set as the ID of the current UCI route section. Each type of route has its own treatment.
+prepare_routes() {
+ local instance; local prefix; local via; local type
+ local section="$1"
+ local protoInstance="$2"
+ get instance $section
+
+ if [ "$instance" = "$protoInstance" ]; then
+ get type $section
+ case "$type" in
+ "router")
+ get prefix $section
+ get via $section
+ [ -n "$prefix" -a -n "$via" ] && writeToConfig " route $prefix via $via;"
+ ;;
+ "special")
+ get prefix $section
+ get attribute $section
+ [ -n "$prefix" -a -n "$attribute" ] && writeToConfig " route $prefix $attribute;"
+ ;;
+ "iface")
+ get prefix $section
+ get iface $section
+ [ -n "$prefix" -a -n "$iface" ] && writeToConfig ' route '$prefix' via "'$iface'";'
+ ;;
+ "multipath")
+ get prefix $section
+ write " route $prefix multipath" $prefix
+ config_list_foreach $section l_via multipath_list
+ writeToConfig " ;"
+ ;;
+ esac
+ fi
+}
+
+# Function: prepare_kernel $1
+# $1 string
+# This function gets each "kernel" protocol section in the UCI configuration and sets each option in the bird6.conf file.
+# $1 is set as the ID of the current UCI kernel section.
+prepare_kernel() {
+ local section="$1"
+ write "#$section configuration:" $section
+ local disabled; local table; local kernel_table; local import; local export; local scan_time; local persist; local learn
+ get_bool disabled $section
+ get table $section
+ get import $section
+ get export $section
+ get scan_time $section
+ get kernel_table $section
+ get learn $section
+ get persist $section
+ writeToConfig "protocol kernel {"
+ write_bool disabled $disabled
+ write " table $table;" $table
+ write " kernel table $kernel_table;" $kernel_table
+ write_bool learn $learn
+ write_bool persist $persist
+ write " scan time $scan_time;" $scan_time
+ write " import $import;" $import
+ write " export $export;" $export
+ writeToConfig "}"
+ writeToConfig " "
+}
+
+# Function: prepare_static $1
+# $1 string
+# This function gets each "static" protocol section in the UCI configuration and sets each option in the bird6.conf file.
+# $1 is set as the ID of the current UCI static section.
+prepare_static() {
+ local section="$1"
+ local disabled
+ get disabled $section
+ if [ "$disabled" -eq 0 ]; then
+ local table
+ get table $section
+ writeToConfig "#$section configration:" $section
+ writeToConfig "protocol static {"
+ write " table $table;" $table
+ config_foreach prepare_routes 'route' $section
+ writeToConfig "}"
+ writeToConfig " "
+ fi
+}
+
+# Function: prepare_device $1
+# $1 string
+# This function gets each "device" protocol section in the UCI configuration and sets each option in the bird6.conf file.
+# $1 is set as the ID of the current UCI device section.
+prepare_device() {
+ local section="$1"
+ local disabled; local scan_time
+ get disabled $section
+ get scan_time $section
+ write "#$section configuration:" $section
+ writeToConfig "protocol device {"
+ write_bool disabled $disabled
+ write " scan time $scan_time;" $scan_time
+ writeToConfig "}"
+ writeToConfig " "
+}
+
+# Function: prepare_bgp_template $1
+# $1 string
+# This function gets each "bgp_template" protocol section in the UCI configuration and sets each option in the bird6.conf file.
+# $1 is set as the ID of the current UCI bgp_template section.
+# Careful! Template options will be replaced by "instance" options if there is any match.
+prepare_bgp_template() {
+ local section="$1"
+ local disabled; local table; local import; local export; local local_address; local local_as; local neighbor_address; local neighbor_as; local source_address; local next_hop_self; local next_hop_keep; local rr_client; local rr_cluster_id; local import_limit; local import_limit_action; local export_limit; local export_limit_action; local receive_limit; local receive_limit_action
+ get_bool disabled $section
+ get_bool next_hop_self $section
+ get_bool next_hop_keep $section
+ get table $section
+ get import $section
+ get export $section
+ get local_address $section
+ get local_as $section
+ get rr_client $section
+ get rr_cluster_id $section
+ get import_limit $section
+ get import_limit_action $section
+ get export_limit $section
+ get export_limit_action $section
+ get receive_limit $section
+ get receive_limit_action $section
+ get neighbor_address $section
+ get neighbor_as $section
+
+ writeToConfig "#$section template:"
+ writeToConfig "template bgp $section {"
+ [ -n "$disabled" ] && write_bool disabled $disabled
+ write " table $table;" $table
+ write " local as $local_as;" $local_as
+ write " source address $local_address;" $local_address
+ write " import $import;" $import
+ write " export $export;" $export
+ if [ -n "$next_hop_self" ]; then
+ [ "$next_hop_self" = "1" ] && writeToConfig " next hop self;" || writeToConfig "# next hop self;"
+ fi
+ if [ -n "$next_hop_keep" ]; then
+ [ "$next_hop_keep" = "1" ] && writeToConfig " next hop keep;" || writeToConfig "# next hop keep;"
+ fi
+ [ "$rr_client" = "1" ] && writeToConfig " rr client;" || writeToConfig "# rr client;"
+ write " rr cluster id $rr_cluster_id;" $rr_cluster_id
+ if [ -n "$import_limit" -a "$import_limit" > "0" ]; then
+ [ -z "$import_limit_action" ] && $import_limit_action = "warn"
+ writeToConfig " import limit $import_limit action $import_limit_action;"
+ fi
+ if [ -n "$export_limit" -a "$export_limit" > "0" ]; then
+ [ -z "$export_limit_action" ] && $export_limit_action = "warn"
+ writeToConfig " export limit $export_limit action $export_limit_action;"
+ fi
+ if [ -n "$receive_limit" -a "$receive_limit" > "0" ]; then
+ [ -z "$receive_limit_action" ] && $receive_limit_action = "warn"
+ writeToConfig " receive limit $receive_limit action $receive_limit_action;"
+ fi
+ [ -n "$neighbor_address" -a -n "$neighbor_as" ] && writeToConfig " neighbor $neighbor_address as $neighbor_as;"
+ writeToConfig "}"
+ writeToConfig " "
+}
+
+# Function: prepare_bgp $1
+# $1 string
+# This function gets each "bgp" protocol section in the UCI configuration and sets each option in the bird6.conf file.
+# $1 is set as the ID of the current UCI bgp section.
+# Careful! The options set in bgp instances overlap bgp_template ones.
+prepare_bgp() {
+ local section="$1"
+ local disabled; local table; local template; local description; local import; local export; local local_address; local local_as; local neighbor_address; local neighbor_as; local rr_client; local rr_cluster_id; local import_limit; local import_limit_action; local export_limit; local export_limit_action; local receive_limit; local receive_limit_action
+ get disabled $section
+ get table $section
+ get template $section
+ get description $section
+ get import $section
+ get export $section
+ get local_address $section
+ get local_as $section
+ get rr_client $section
+ get rr_cluster_id $section
+ get import_limit $section
+ get import_limit_action $section
+ get export_limit $section
+ get export_limit_action $section
+ get receive_limit $section
+ get receive_limit_action $section
+ get neighbor_address $section
+ get neighbor_as $section
+
+ writeToConfig "#$section configuration:"
+ [ -n "$template" ] && writeToConfig "protocol bgp $section from $template {" || writeToConfig "protocol bgp $section {"
+ [ -n "$disabled" ] && write_bool disabled $disabled
+ write " table $table;" $table
+ # [ -n "$description" ] && writeToConfig ' description "'$description'";'
+ write " local as $local_as;" $local_as
+ write " source address $local_address;" $local_address
+ write " import $import;" $import
+ write " export $export;" $export
+ if [ -n "$next_hop_self" ]; then
+ [ "$next_hop_self" = "1" ] && writeToConfig " next hop self;" || writeToConfig "# next hop self;"
+ fi
+ if [ -n "$next_hop_keep" ]; then
+ [ "$next_hop_keep" = "1" ] && writeToConfig " next hop keep;" || writeToConfig "# next hop keep;"
+ fi
+ [ "$rr_client" = "1" ] && writeToConfig " rr client;" || writeToConfig "# rr client;"
+ write " rr cluster id $rr_cluster_id;" $rr_cluster_id
+ if [ -n "$import_limit" -a "$import_limit" > "0" ]; then
+ [ -z "$import_limit_action" ] && $import_limit_action = "warn"
+ writeToConfig " import limit $import_limit action $import_limit_action;"
+ fi
+ if [ -n "$export_limit" -a "$export_limit" > "0" ]; then
+ [ -z "$export_limit_action" ] && $export_limit_action = "warn"
+ writeToConfig " export limit $export_limit action $export_limit_action;"
+ fi
+ if [ -n "$receive_limit" -a "$receive_limit" > "0" ]; then
+ [ -z "$receive_limit_action" ] && $receive_limit_action = "warn"
+ writeToConfig " receive limit $receive_limit action $receive_limit_action;"
+ fi
+ [ -n "$neighbor_address" -a -n "$neighbor_as" ] && writeToConfig " neighbor $neighbor_address as $neighbor_as;"
+ writeToConfig "}"
+ writeToConfig " "
+}
+
+# Function: prepare_bgp_filters $1
+# $1 string
+# This function gets each "bgp_filter" protocol section in the UCI configuration and sets each option in the bird6.conf file.
+# $1 is set as the ID of the current UCI bgp_filter section.
+# This function checks if the filter file exists and, in that case, it writes its content to the configuration file.
+prepare_bgp_filters() {
+ local section="$1"
+ local type
+ local file_path
+ get type $section
+ get file_path $section
+ if [ -e "$file_path" ]; then
+ local filter_content=`cat $file_path`
+ if [ -n "$type" -a "$type" = "bgp" ]; then
+ writeToConfig "#Filter $section:"
+ writeToConfig "${filter_content}"
+ writeToConfig " "
+ fi
+ fi
+}
+
+
+start() {
+ config_load bird6
+ local use_UCI_config
+ get use_UCI_config 'bird'
+
+ if [ -z "$use_UCI_config" -o "$use_UCI_config" = "0" ]; then
+ service_start $BIRD_BIN -d -c $BIRD_CONFIG -P $SERVICE_PID_FILE
+ else
+ #Set Bird6 configuration location:
+ local UCI_config_File
+ get UCI_config_File 'bird'
+ BIRD_CONFIG=${UCI_config_File:-/tmp/bird6.conf}
+ #Setup the basic configuration
+ prepare_global 'global'
+ config_foreach prepare_kernel 'kernel'
+ config_foreach prepare_static 'static'
+ config_foreach prepare_device 'device'
+ #config_foreach prepare_direct 'direct'
+
+ #Setup the protocols configuration (currently BGP only)
+ config_foreach prepare_bgp_template 'bgp_template'
+ config_foreach prepare_bgp 'bgp'
+ config_foreach prepare_bgp_filters 'filter'
+ #Start the service
+ service_start $BIRD_BIN -d -c $BIRD_CONFIG -P $SERVICE_PID_FILE
+ fi
+}
+
+stop() {
+ service_stop $BIRD_BIN
+}
+
+restart() {
+ stop
+ start
+}
+
+
+reload() {
+ service_reload $BIRD_BIN
+}
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