[package] dropbear: performance improvements in init script, quiet mode for start...

[openwrt/svn-archive/archive.git] / package / dropbear / files / dropbear.init

diff --git a/package/dropbear/files/dropbear.init b/package/dropbear/files/dropbear.init
index 6f35672d546e67827ba43cd3afa57c81f711b5eb..85a90d02fded9b8f768f7a153994ee662096d820 100755 (executable)
--- a/package/dropbear/files/dropbear.init
+++ b/package/dropbear/files/dropbear.init
@@ -1,35 +1,68 @@
 #!/bin/sh /etc/rc.common
-# Copyright (C) 2006 OpenWrt.org
+# Copyright (C) 2006-2010 OpenWrt.org
 # Copyright (C) 2006 Carlos Sobrinho
 
-config_cb() {
-       local cfg="$CONFIG_SECTION"
+NAME=dropbear
+PROG=/usr/sbin/dropbear
+START=50
+STOP=50
+PIDCOUNT=0
+EXTRA_COMMANDS="killclients"
+EXTRA_HELP="   killclients Kill ${NAME} processes except servers and yourself"
+
+dropbear_start()
+{
+       local section="$1"
+
+       # check if section is enabled (default)
+       local enabled
+       config_get_bool enabled "${section}" enable 1
+       [ "${enabled}" -eq 0 ] && return 1
+
+       # verbose parameter
+       local verbosed
+       config_get_bool verbosed "${section}" verbose 0
+
+       # increase pid file count to handle multiple instances correctly
+       PIDCOUNT="$(( ${PIDCOUNT} + 1))"
+
+       # prepare parameters
+       # A) password authentication
        local nopasswd
-       local type
-       config_get cfgtype "$cfg" TYPE
-
-       case "$cfgtype" in
-               dropbear)
-                       config_get passauth $cfg PasswordAuth
-                       config_get port $cfg Port
-
-                       case "$passauth" in
-                               no|off|disabled|0) nopasswd=1;;
-                       esac
-                       DROPBEAR_ARGS="${port:+-p $port} ${nopasswd:+-s}"
-               ;;
-       esac
+       local passauth
+       config_get_bool passauth "${section}" PasswordAuth 1
+       [ "${passauth}" -eq 0 ] && nopasswd=1
+       # B) listen port
+       local port
+       config_get port "${section}" Port
+       # C) banner file
+       local bannerfile
+       config_get bannerfile ${section} BannerFile
+       [ -f $bannerfile ] || bannerfile=''
+       # D) gatewayports
+       local gatewayports
+       config_get_bool gatewayports "${section}" GatewayPorts 0
+       [ "${gatewayports}" -eq 1 ] || gatewayports=''
+       # concatenate parameters
+       local args
+       args="${nopasswd:+-s }${port:+-p ${port} }${bannerfile:+-b $bannerfile }${gatewayports:+-a }-P /var/run/${NAME}.${PIDCOUNT}.pid"
+
+       # execute program and return its exit code
+       [ "${verbosed}" -ne 0 ] && echo "${initscript}: section ${section} starting ${PROG} ${args}"
+       ${PROG} ${args}
+       return $?
 }
 
-start() {
+keygen()
+{
        for keytype in rsa dss; do
                # check for keys
-               key=/tmp/dropbear/dropbear_${keytype}_host_key
-               [ ! -f $key ] && {
+               key=dropbear/dropbear_${keytype}_host_key
+               [ -f /tmp/$key -o -s /etc/$key ] || {
                        # generate missing keys
                        mkdir -p /tmp/dropbear
                        [ -x /usr/bin/dropbearkey ] && {
-                               /usr/bin/dropbearkey -t $keytype -f $key 2>&- >&- && exec /etc/rc.common "$initscript" start
+                               /usr/bin/dropbearkey -t $keytype -f /tmp/$key 2>&- >&- && exec /etc/rc.common "$initscript" start
                        } &
                exit 0
                }
@@ -39,13 +72,81 @@ start() {
        mkdir -p /etc/dropbear
        mv /tmp/dropbear/dropbear_* /etc/dropbear/
        lock -u /tmp/.switch2jffs
-       
        chown root /etc/dropbear
        chmod 0700 /etc/dropbear
-       config_load dropbear
-       /usr/sbin/dropbear $DROPBEAR_ARGS
 }
 
-stop() {
-       killall dropbear
+start()
+{
+       [ -s /etc/dropbear/dropbear_rsa_host_key -a \
+         -s /etc/dropbear/dropbear_dss_host_key ] || keygen
+
+       config_load "${NAME}"
+       config_foreach dropbear_start dropbear
+}
+
+stop()
+{
+       # killing all server processes
+       local pidfile
+       for pidfile in `ls /var/run/${NAME}.*.pid`
+        do
+               start-stop-daemon -q -K -s KILL -p "${pidfile}" -n "${NAME}"
+               rm -f "${pidfile}"
+       done
+       [ -z "${pidfile}" ] && echo "${initscript}: no pid files, if you get problems with start then try killclients"
+}
+
+killclients()
+{
+       local ignore=''
+       local server
+       local pid
+
+       # if this script is run from inside a client session, then ignore that session
+       pid="$$"
+       while [ "${pid}" -ne 0 ]
+        do
+               # get parent process id
+               pid=`cut -d ' ' -f 4 "/proc/${pid}/stat"`
+               [ "${pid}" -eq 0 ] && break
+
+               # check if client connection
+               grep -F -q -e "${PROG}" "/proc/${pid}/cmdline" && {
+                       append ignore "${pid}"
+                       break
+               }
+       done
+
+       # get all server pids that should be ignored
+       for server in `cat /var/run/${NAME}.*.pid`
+        do
+               append ignore "${server}"
+       done
+
+       # get all running pids and kill client connections
+       local skip
+       for pid in `pidof "${NAME}"`
+        do
+               # check if correct program, otherwise process next pid
+               grep -F -q -e "${PROG}" "/proc/${pid}/cmdline" || {
+                       continue
+               }
+
+               # check if pid should be ignored (servers, ourself)
+               skip=0
+               for server in ${ignore}
+                do
+                       if [ "${pid}" == "${server}" ]
+                        then
+                               skip=1
+                               break
+                       fi
+               done
+               [ "${skip}" -ne 0 ] && continue
+
+               # kill process
+               echo "${initscript}: Killing ${pid}..."
+               kill -KILL ${pid}
+       done
 }