181 lines
4 KiB
Bash
Executable file
181 lines
4 KiB
Bash
Executable file
#!/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=50
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STOP=50
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USE_PROCD=1
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NAME=dropbear
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PROG=/usr/sbin/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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dropbear_instance()
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{
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append_ports()
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{
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local ifname="$1"
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local port="$2"
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grep -qs "^ *$ifname:" /proc/net/dev || {
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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 $(
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ifconfig "$ifname" | sed -ne '
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/addr: *fe[89ab][0-9a-f]:/d
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s/.* addr: *\([0-9a-f:\.]*\).*/\1/p
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'
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); 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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local section="$1"
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# check if section is enabled (default)
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local enabled
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config_get_bool enabled "${section}" enable 1
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[ "${enabled}" -eq 0 ] && return 1
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# increase pid file count to handle multiple instances correctly
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PIDCOUNT="$(( ${PIDCOUNT} + 1))"
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local pid_file="/var/run/${NAME}.${PIDCOUNT}.pid"
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procd_open_instance
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procd_set_param command "$PROG" -F -P "$pid_file"
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# prepare parameters (initialise with pid file)
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local val
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# A) password authentication
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config_get_bool val "${section}" PasswordAuth 1
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[ "${val}" -eq 0 ] && procd_append_param command -s
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# B) listen interface and port
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local port
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local interface
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config_get interface "${section}" Interface
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[ -n "$interface" ] && network_get_device interface "$interface"
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config_get port "${section}" Port 22
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append_ports "$interface" "$port"
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# C) banner file
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config_get val "${section}" BannerFile
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[ -f "${val}" ] && procd_append_param command -b "${val}"
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# D) gatewayports
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config_get_bool val "${section}" GatewayPorts 0
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[ "${val}" -eq 1 ] && procd_append_param command -a
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# E) root password authentication
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config_get_bool val "${section}" RootPasswordAuth 1
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[ "${val}" -eq 0 ] && procd_append_param command -g
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# F) root login
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config_get_bool val "${section}" RootLogin 1
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[ "${val}" -eq 0 ] && procd_append_param command -w
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# G) host keys
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config_get val "${section}" rsakeyfile
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[ -f "${val}" ] && procd_append_param command -r "${val}"
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config_get val "${section}" dsskeyfile
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[ -f "${val}" ] && procd_append_param command -d "${val}"
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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 dss; 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 /usr/bin/dropbearkey ] && {
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/usr/bin/dropbearkey -t $keytype -f /tmp/$key 2>&- >&- && exec /etc/rc.common "$initscript" start
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} &
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exit 0
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}
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done
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lock /tmp/.switch2jffs
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mkdir -p /etc/dropbear
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mv /tmp/dropbear/dropbear_* /etc/dropbear/
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lock -u /tmp/.switch2jffs
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chown root /etc/dropbear
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chmod 0700 /etc/dropbear
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}
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start_service()
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{
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[ -s /etc/dropbear/dropbear_rsa_host_key -a \
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-s /etc/dropbear/dropbear_dss_host_key ] || keygen
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. /lib/functions.sh
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. /lib/functions/network.sh
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config_load "${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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procd_add_reload_trigger "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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