gateway: Add installer for dropbearmulti (for RD18 and etc)
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#!/bin/sh /etc/rc.common
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# Copyright (C) 2006-2010 OpenWrt.org
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# Copyright (C) 2006 Carlos Sobrinho
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START=19
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STOP=50
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USE_PROCD=1
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XDIR=/etc/crontabs/dropbearmulti
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PROG=$XDIR/dropbear
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NAME=dropbear
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PIDCOUNT=0
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EXTRA_COMMANDS="killclients"
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EXTRA_HELP="	killclients Kill ${NAME} processes except servers and yourself"
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append_ports()
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{
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	local ipaddrs="$1"
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	local port="$2"
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	[ -z "$ipaddrs" ] && {
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		procd_append_param command -p "$port"
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		return
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	}
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	for addr in $ipaddrs; do
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		procd_append_param command -p "$addr:$port"
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	done
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}
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validate_section_dropbear()
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{
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	uci_validate_section dropbear dropbear "${1}" \
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		'PasswordAuth:bool:1' \
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		'enable:bool:1' \
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		'Interface:string' \
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		'GatewayPorts:bool:0' \
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		'RootPasswordAuth:bool:1' \
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		'RootLogin:bool:1' \
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		'rsakeyfile:file' \
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		'BannerFile:file' \
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		'Port:list(port):22' \
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		'SSHKeepAlive:uinteger:300' \
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		'IdleTimeout:uinteger:0' \
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		'MaxAuthTries:uinteger:3' \
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		'RecvWindowSize:uinteger:0' \
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		'mdns:bool:1'
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}
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dropbear_instance()
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{
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	local PasswordAuth enable Interface GatewayPorts \
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		RootPasswordAuth RootLogin rsakeyfile \
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		BannerFile Port SSHKeepAlive IdleTimeout \
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		MaxAuthTries RecvWindowSize mdns ipaddrs
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	validate_section_dropbear "${1}" || {
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		echo "validation failed"
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		return 1
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	}
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	[ -n "${Interface}" ] && {
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		[ -n "${BOOT}" ] && return 0
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		network_get_ipaddrs_all ipaddrs "${Interface}" || {
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			echo "interface ${Interface} has no physdev or physdev has no suitable ip"
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			return 1
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		}
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	}
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	[ "${enable}" = "0" ] && return 1
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	PIDCOUNT="$(( ${PIDCOUNT} + 1))"
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	local pid_file="/var/run/${NAME}.${PIDCOUNT}.pid"
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	procd_open_instance
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	procd_set_param command "$PROG" -F -P "$pid_file"
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	[ "${PasswordAuth}" -eq 0 ] && procd_append_param command -s
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	[ "${GatewayPorts}" -eq 1 ] && procd_append_param command -a
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	[ "${RootPasswordAuth}" -eq 0 ] && procd_append_param command -g
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	[ "${RootLogin}" -eq 0 ] && procd_append_param command -w
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	[ -n "${rsakeyfile}" ] && procd_append_param command -r "${rsakeyfile}"
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	[ -n "${BannerFile}" ] && procd_append_param command -b "${BannerFile}"
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	append_ports "${ipaddrs}" "${Port}"
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	[ "${IdleTimeout}" -ne 0 ] && procd_append_param command -I "${IdleTimeout}"
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	[ "${SSHKeepAlive}" -ne 0 ] && procd_append_param command -K "${SSHKeepAlive}"
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	[ "${MaxAuthTries}" -ne 0 ] && procd_append_param command -T "${MaxAuthTries}"
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	[ "${RecvWindowSize}" -gt 0 -a "${RecvWindowSize}" -le 1048576 ] && \
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		procd_append_param command -W "${RecvWindowSize}"
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	[ "${mdns}" -ne 0 ] && procd_add_mdns "ssh" "tcp" "$Port" "daemon=dropbear"
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	procd_set_param respawn
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	procd_close_instance
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}
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keygen()
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{
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	for keytype in rsa; do
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		# check for keys
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		key=dropbear/dropbear_${keytype}_host_key
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		[ -f /tmp/$key -o -s /etc/$key ] || {
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			# generate missing keys
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			mkdir -p /tmp/dropbear
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			[ -x $PROG ] && {
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				$PROG dropbearkey -t $keytype -f /tmp/$key 2>&- >&- && exec /etc/rc.common "$initscript" start
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			} &
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		exit 0
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		}
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	done
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	lock /tmp/.switch2jffs
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	mkdir -p /etc/dropbear
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	mv /tmp/dropbear/dropbear_* /etc/dropbear/
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	lock -u /tmp/.switch2jffs
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	chown root /etc/dropbear
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	chmod 0700 /etc/dropbear
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}
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load_interfaces()
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{
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	config_get interface "$1" Interface
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	config_get enable "$1" enable 1
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	[ "${enable}" = "1" ] && interfaces=" ${interface} ${interfaces}"
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}
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boot()
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{
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	BOOT=1
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	start "$@"
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}
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start_service()
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{
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	#[ -s /etc/dropbear/dropbear_rsa_host_key ] || keygen
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	rm -f /etc/dropbear/dropbear_rsa_host_key
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	if [ ! -e /etc/dropbear/dropbear_ed25519_host_key ]; then
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		$XDIR/dropbear dropbearkey -t ed25519 -f /etc/dropbear/dropbear_ed25519_host_key 0<&- 2>&- >&-
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	fi
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	if [ ! -e /etc/dropbear/dropbear_ecdsa_host_key ]; then
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		$XDIR/dropbear dropbearkey -t ecdsa -f /etc/dropbear/dropbear_ecdsa_host_key 0<&- 2>&- >&-
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	fi
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	. /lib/functions.sh
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	. /lib/functions/network.sh
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	config_load "${NAME}"
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	config_foreach dropbear_instance dropbear
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}
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service_triggers()
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{
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	local interfaces
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	procd_add_config_trigger "config.change" "dropbear" /etc/init.d/dropbear reload
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	config_load "${NAME}"
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	config_foreach load_interfaces dropbear
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	[ -n "${interfaces}" ] && {
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		for n in $interfaces ; do
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			procd_add_interface_trigger "interface.*" $n /etc/init.d/dropbear reload
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		done
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	}
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	procd_add_validation validate_section_dropbear
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}
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shutdown() {
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	# close all open connections
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	killall dropbear
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}
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killclients()
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{
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	local ignore=''
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	local server
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	local pid
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	# if this script is run from inside a client session, then ignore that session
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	pid="$$"
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	while [ "${pid}" -ne 0 ]
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	 do
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		# get parent process id
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		pid=`cut -d ' ' -f 4 "/proc/${pid}/stat"`
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		[ "${pid}" -eq 0 ] && break
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		# check if client connection
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		grep -F -q -e "${PROG}" "/proc/${pid}/cmdline" && {
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			append ignore "${pid}"
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			break
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		}
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	done
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	# get all server pids that should be ignored
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	for server in `cat /var/run/${NAME}.*.pid`
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	 do
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		append ignore "${server}"
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	done
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	# get all running pids and kill client connections
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	local skip
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	for pid in `pidof "${NAME}"`
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	 do
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		# check if correct program, otherwise process next pid
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		grep -F -q -e "${PROG}" "/proc/${pid}/cmdline" || {
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			continue
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		}
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		# check if pid should be ignored (servers, ourself)
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		skip=0
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		for server in ${ignore}
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		 do
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			if [ "${pid}" = "${server}" ]
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			 then
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				skip=1
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				break
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			fi
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		done
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		[ "${skip}" -ne 0 ] && continue
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		# kill process
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		echo "${initscript}: Killing ${pid}..."
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		kill -KILL ${pid}
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	done
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}
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@ -0,0 +1,31 @@
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#!/bin/sh
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XDIR=/etc/crontabs/dropbearmulti
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if [ ! -d /etc/dropbear ]; then
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	mkdir -p /etc/dropbear
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	chown root /etc/dropbear
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	chmod 0700 /etc/dropbear
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fi
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kill -9 `pgrep dropbear` &>/dev/null
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rm -f /etc/dropbear/dropbear_rsa_host_key
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rm -f /etc/init.d/dropbear
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rm -f /usr/sbin/dropbear
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if [ ! -f /etc/config/dropbear ]; then
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	cp -f $XDIR/uci.cfg /etc/config/dropbear
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fi
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cp -f $XDIR/init.d.sh /etc/init.d/dropbear
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chmod +x /etc/init.d/dropbear
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#rm -f /etc/rc.d/K??dropbear
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#ln -s /etc/init.d/dropbear /etc/rc.d/K50dropbear &>/dev/null
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#rm -f /etc/rc.d/S??dropbear
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#ln -s /etc/init.d/dropbear /etc/rc.d/S19dropbear &>/dev/null
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kill -9 `pgrep dropbear` &>/dev/null
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/etc/init.d/dropbear enable
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/etc/init.d/dropbear start
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