OpenWrt – Rev 4

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#!/bin/sh /etc/rc.common
# Copyright (C) 2008-2015 OpenWrt.org

START=90
STOP=01

USE_PROCD=1
LLDPCLI=/usr/sbin/lldpcli
LLDPSOCKET=/var/run/lldpd.socket
LLDPD_CONF=/tmp/lldpd.conf
LLDPD_CONFS_DIR=/tmp/lldpd.d

find_release_info()
{
        [ -s /etc/os-release ] && . /etc/os-release
        [ -z "$PRETTY_NAME" ] && [ -s /etc/openwrt_version ] && \
                PRETTY_NAME="$(cat /etc/openwrt_version)"

        echo "${PRETTY_NAME:-Unknown OpenWrt release} @ $(cat /proc/sys/kernel/hostname)"
}

write_lldpd_conf()
{
        . /lib/functions/network.sh

        local lldp_description

        config_load 'lldpd'
        config_get lldp_description 'config' 'lldp_description' "$(find_release_info)"

        local ifaces
        config_get ifaces 'config' 'interface'

        local iface ifnames=""
        for iface in $ifaces; do
                local ifname=""
                if network_get_device ifname "$iface" || [ -e "/sys/class/net/$iface" ]; then
                        append ifnames "${ifname:-$iface}" ","
                fi
        done

        # Clear out the config file first
        echo -n > "$LLDPD_CONF"
        [ -n "$ifnames" ] && echo "configure system interface pattern" "$ifnames" >> "$LLDPD_CONF"
        [ -n "$lldp_description" ] && echo "configure system description" "\"$lldp_description\"" >> "$LLDPD_CONF"

        # Since lldpd's sysconfdir is /tmp, we'll symlink /etc/lldpd.d to /tmp/$LLDPD_CONFS_DIR
        [ -e $LLDPD_CONFS_DIR ] || ln -s /etc/lldpd.d $LLDPD_CONFS_DIR
}

start_service() {

        local enable_cdp
        local enable_fdp
        local enable_sonmp
        local enable_edp
        local lldp_class
        local lldp_location
        local readonly_mode
        local agentxsocket

        config_load 'lldpd'
        config_get_bool enable_cdp 'config' 'enable_cdp' 0
        config_get_bool enable_fdp 'config' 'enable_fdp' 0
        config_get_bool enable_sonmp 'config' 'enable_sonmp' 0
        config_get_bool enable_edp 'config' 'enable_edp' 0
        config_get lldp_class 'config' 'lldp_class'
        config_get lldp_location 'config' 'lldp_location'
        config_get_bool readonly_mode 'config' 'readonly_mode' 0
        config_get agentxsocket 'config' 'agentxsocket'

        mkdir -p /var/run/lldp
        chown lldp:lldp /var/run/lldp

        # When lldpd starts, it also loads up what we write in this config file
        write_lldpd_conf

        procd_open_instance
        procd_set_param command /usr/sbin/lldpd
        procd_append_param command -d # don't daemonize, procd will handle that for us

        [ $enable_cdp -gt 0 ] && procd_append_param command '-c'
        [ $enable_fdp -gt 0 ] && procd_append_param command '-f'
        [ $enable_sonmp -gt 0 ] && procd_append_param command '-s'
        [ $enable_edp -gt 0 ] && procd_append_param command '-e'
        [ $readonly_mode -gt 0 ] && procd_append_param command '-r'
        [ -n "$lldp_class" ] && procd_append_param command -M "$lldp_class"
        [ -n "$agentxsocket" ] && procd_append_param command -x -X "$agentxsocket"

        # set auto respawn behavior
        procd_set_param respawn
        procd_close_instance
}

service_running() {
        pgrep -x /usr/sbin/lldpd &> /dev/null
}

reload_service() {
        running || return 1
        $LLDPCLI -u $LLDPSOCKET &> /dev/null <<-EOF
                pause
                unconfigure lldp custom-tlv
                unconfigure system interface pattern
                unconfigure system description
        EOF
        # Rewrite lldpd.conf
        # If something changed it should be included by the lldpcli call
        write_lldpd_conf
        $LLDPCLI -u $LLDPSOCKET -c $LLDPD_CONF -c $LLDPD_CONFS_DIR &> /dev/null
        # Broadcast update over the wire
        $LLDPCLI -u $LLDPSOCKET &> /dev/null <<-EOF
                resume
                update
        EOF
        return 0
}

stop_service() {
        rm -rf /var/run/lldp $LLDPSOCKET
}