#!/bin/sh

# PROVIDE: frr dynamicrouting
# REQUIRE: netif routing
# KEYWORD: nojailvnet shutdown

# Add the following line to /etc/rc.conf to enable frr:
#  frr_enable="YES"

# FRR's daemon management concept:
# - watchfrr is used to manage (start/monitor/restart) all frr deamons;
# - vtysh used to daemons boot startup configuration;
# - mgmtd is the management plane.
# There are a minimum of 3 daemons running: watchfrr, zebra, mgmtd

# Startup details with watchfrr enabled (default):
# 1. "service frr start" calls "service frr start watchfrr"
# 2. watchfrr once started calls "service frr restart all"
# 3. "restart all" need to loop the list of $frr_daemons to start each
#    of then
# 4. vtysh -b is executed to load boot startup configuration

# Startup detail with watchfrr disabled (deprecated mode):
# 1. "service frr start" call "service frr start all" and need to loop $frr_daemons

# To select a limited set of daemons to run, use the frr_daemons.
# Order matters: keep mgmtd first, followed by zebra.
# Example to start only staticd and bgpd:
#  frr_daemons="mgmtd zebra staticd bgpd"

# You may also wish to use the following variables to fine-tune startup:
# To disable integrated configuration mode, to use one configuration file per
# daemons.
# This mode is deprecated and not compatible with watchfrr and mgmtd
#  frr_vtysh_boot="NO"
#  watchfrr_enable="NO"

# Global tuning
#  frr_flags="--limit-fds 100000" (restricting fds for each daemons)
#  frr_default_profile="datacenter" (default: traditional)
# Per daemon tuning may be done with daemon-name_flags
#  zebra_flags="-P 0"
#  bgpd_flags="-nrP 0" and so on
# If you want to give the routing daemons a chance to catchup before
# continuing, set frr_wait_for to a "default" or certain prefix.
#  frr_wait_for="default"
# Set the time limit for the wait.
#  frr_wait_seconds="90"
#
# If the frr daemons require additional shared libraries to start,
# use the following variable to run ldconfig(8) in advance:
#  frr_extralibs_path="/usr/local/lib ..."
#
# This RC script was adapted from:
# - FRR's tools/frrinit.sh.in (starting watchfrr)
# - FRR's tools/frrcommon.sh.in (starting frr daemons)
# - FRR's tools/etc/frr/daemons (default daemon flags)

. /etc/rc.subr

name=frr
rcvar=${name}_enable

start_postcmd=start_postcmd
command_args="-d"

load_rc_config $name
: ${frr_enable:="NO"}
: ${frr_flags:="--limit-fds 100000"}
: ${watchfrr_enable:="YES"}
: ${frr_daemons:="mgmtd zebra babeld bfdd bgpd eigrpd fabricd isisd ospfd ospf6d ripd ripngd staticd"}
: ${watchfrr_flags:="-r /usr/sbin/servicebBfrrbBrestartbB%s -s /usr/sbin/servicebBfrrbBstartbB%s -k /usr/sbin/servicebBfrrbBstopbB%s -b bB -t 30"}
: ${frr_default_profile:="traditional"}
: ${frr_vtysh_boot:="YES"}
: ${frr_wait_for:=""}
: ${frr_wait_seconds:="90"}
# Default daemons'flag restrict binding vty's to localhost
: ${zebra_flags:="-A 127.0.0.1"}
: ${mgmtd_flags:="-A 127.0.0.1"}
: ${babeld_flags:="-A 127.0.0.1"}
: ${bgpd_flags:="-A 127.0.0.1"}
: ${eigrpd_flags:="-A 127.0.0.1"}
: ${fabricd_flags:="-A 127.0.0.1"}
: ${isisd_flags:="-A 127.0.0.1"}
: ${ospfd_flags:="-A 127.0.0.1"}
: ${ospf6d_flags:="-A ::1"}
: ${ripd_flags:="-A 127.0.0.1"}
: ${ripngd_flags:="-A ::1"}
: ${staticd_flags:="-A 127.0.0.1"}
frr_flags="${frr_flags} -F ${frr_default_profile}"

start_postcmd() {
	local waited_for
	waited_for=0
	# Wait only when last daemon has started.
	if [ "${frr_daemons}" = "${frr_daemons% ${name}}" ]; then
		return;
	fi
        if [ -n "${frr_wait_for}" ]; then
		echo Waiting for ${frr_wait_for} route...
		while [ ${waited_for} -lt ${frr_wait_seconds} ]; do
			/sbin/route -n get ${frr_wait_for} >/dev/null 2>&1 && break;
			waited_for=$((waited_for+1))
			sleep 1;
		done
		[ ${waited_for} -lt ${frr_wait_seconds} ] || echo Giving up...
	fi
}

do_cmd() {
	# Entering here, global var dmn contains the daemon name
	# $1 the daemon name (must be uniq and cannot be all)
	local ret
	local cmd
	local dmn
	ret=0
	dmn=$1
	if [ -n "${dmn}" ] && [ "${dmn}" != "all" ]; then
		command=%%PREFIX%%/sbin/${dmn}
		pidfile=/var/run/frr/${dmn}.pid
		eval flags=\$\{${dmn}_flags:-\"\"\}
		flags="${flags} ${frr_flags}"
		if [ "${dmn}" = "watchfrr" ]; then
			# watchfrr is expecting all daemon names as flags
			flags="${flags} ${watchfrr_daemons}"
		fi
		name=${dmn}
		_rc_restart_done=false
		stop_postcmd="rm -f $pidfile"
		run_rc_command "${frr_cmd}" || ret=1
	else
		echo "Bug in do_cmd(): called without argument or with all"
		ret=1
	fi
	return ${ret}
}

vtysh_b () {
	local ret
	ret=0
	if checkyesno frr_vtysh_boot; then
		%%PREFIX%%/bin/vtysh -b || ret=1
	fi
	return ${ret}
}

loop_do_cmd() {
	local ret
	local daemon
	ret=0
	for daemon in ${frr_daemons}; do
		do_cmd ${daemon} || ret=1
	done
	if ( [ ${frr_cmd} = "restart" ] || [ ${frr_cmd} = "start" ] ); then
	    vtysh_b || ret=1
	fi
	return ${ret}
}

frr_cmd=$1

# remove unsuported extra command
# Example: "service frr fast start" is replaced by "service frr start"

case "$1" in
    force*)
		frr_cmd=${frr_cmd#force}
		;;
    fast*)
		frr_cmd=${frr_cmd#fast}
		;;
esac
shift

# If daemon specified, replace the full list by its name
# or with watchfrr if not disabled
# Example: extract "bgpd" from a "service frr start bgpd"
if [ $# -ge 1 ]; then
	if [ "$1" != "all" ]; then
		frr_daemons=$1
	fi
else
	if checkyesno watchfrr_enable; then
		watchfrr_daemons=${frr_daemons}
		frr_daemons=watchfrr
	fi
fi

case "${frr_cmd}" in
    start|quietstart)
		if checkyesno frr_enable; then
			if [ -n "${frr_extralibs_path}" ]; then
				/sbin/ldconfig -m ${frr_extralibs_path}
			fi
			if [ -x %%PREFIX%%/etc/rc.d/watchfrr ]; then
				echo "WARNING: Old rc.d/watchfrr detected, this file must be deleted"
			fi
			if checkyesno frr_vtysh_boot; then
				echo "Checking intergrated config..."
				if ! [ -f %%ETCDIR%%/vtysh.conf ]; then
					mkdir -p %%ETCDIR%%
					echo "service integrated-vtysh-config" > %%ETCDIR%%/vtysh.conf
				fi
				if ! [ -f %%ETCDIR%%/frr.conf ]; then
					echo "log syslog informational" > %%ETCDIR%%/frr.conf
				fi
				chown -R frr:frr %%ETCDIR%%
			fi
			loop_do_cmd
		fi
		;;
    stop)
		if checkyesno frr_enable; then
			# watchfrr do not stop all daemons, so need to stop it first
			# then continuing with all others daemons
			if [ "${frr_daemons}" = "watchfrr" ]; then
				loop_do_cmd
				frr_daemons=${watchfrr_daemons}
			fi
			frr_daemons=$(reverse_list ${frr_daemons})
			loop_do_cmd
		fi
		;;
    restart)
		if checkyesno frr_enable; then
			# watchfrr calls "service frr restart all" at startup
			# to start all services
			frr_daemons=$(reverse_list ${frr_daemons})
			frr_cmd=stop
			loop_do_cmd
			frr_daemons=$(reverse_list ${frr_daemons})
			frr_cmd=start
			loop_do_cmd
		fi
		;;
    reload)
		if ! [ -x %%PREFIX%%/sbin/frr-reload.py ]; then
			echo "Please install frr-pythontools package. Required for reload"
			exit 0
		fi
		%%PREFIX%%/sbin/frr-reload.py --reload --confdir %%ETCDIR%% --rundir /var/run/frr %%ETCDIR%%/frr.conf
		;;
    *)
		loop_do_cmd
		;;
esac
