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#!/bin/sh /etc/rc.common
# Copyright (C) 2006-2010 OpenWrt.org
# Copyright (C) 2006 Carlos Sobrinho
START=50
STOP=50
USE_PROCD=1
NAME=dropbear
PROG=/usr/sbin/dropbear
PIDCOUNT=0
EXTRA_COMMANDS="killclients"
EXTRA_HELP=" killclients Kill ${NAME} processes except servers and yourself"
dropbear_instance()
{
append_ports()
{
local ifname="$1"
local port="$2"
grep -qs "^ *$ifname:" /proc/net/dev || {
procd_append_param command -p "$port"
return
}
for addr in $(
ifconfig "$ifname" | sed -ne '
/addr: *fe[89ab][0-9a-f]:/d
s/.* addr: *\([0-9a-f:\.]*\).*/\1/p
'
); do
procd_append_param command -p "$addr:$port"
done
}
local section="$1"
# check if section is enabled (default)
local enabled
config_get_bool enabled "${section}" enable 1
[ "${enabled}" -eq 0 ] && return 1
# increase pid file count to handle multiple instances correctly
PIDCOUNT="$(( ${PIDCOUNT} + 1))"
local pid_file="/var/run/${NAME}.${PIDCOUNT}.pid"
procd_open_instance
procd_set_param command "$PROG" -F -P "$pid_file"
# prepare parameters (initialise with pid file)
local val
# A) password authentication
config_get_bool val "${section}" PasswordAuth 1
[ "${val}" -eq 0 ] && procd_append_param command -s
# B) listen interface and port
local port
local interface
config_get interface "${section}" Interface
[ -n "$interface" ] && network_get_device interface "$interface"
config_get port "${section}" Port 22
append_ports "$interface" "$port"
# C) banner file
config_get val "${section}" BannerFile
[ -f "${val}" ] && procd_append_param command -b "${val}"
# D) gatewayports
config_get_bool val "${section}" GatewayPorts 0
[ "${val}" -eq 1 ] && procd_append_param command -a
# E) root password authentication
config_get_bool val "${section}" RootPasswordAuth 1
[ "${val}" -eq 0 ] && procd_append_param command -g
# F) root login
config_get_bool val "${section}" RootLogin 1
[ "${val}" -eq 0 ] && procd_append_param command -w
# G) host keys
config_get val "${section}" rsakeyfile
[ -f "${val}" ] && procd_append_param command -r "${val}"
config_get val "${section}" dsskeyfile
[ -f "${val}" ] && procd_append_param command -d "${val}"
procd_close_instance
}
keygen()
{
for keytype in rsa dss; do
# check for keys
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 $keytype -f /tmp/$key 2>&- >&- && exec /etc/rc.common "$initscript" start
} &
exit 0
}
done
lock /tmp/.switch2jffs
mkdir -p /etc/dropbear
mv /tmp/dropbear/dropbear_* /etc/dropbear/
lock -u /tmp/.switch2jffs
chown root /etc/dropbear
chmod 0700 /etc/dropbear
}
start_service()
{
[ -s /etc/dropbear/dropbear_rsa_host_key -a \
-s /etc/dropbear/dropbear_dss_host_key ] || keygen
. /lib/functions.sh
. /lib/functions/network.sh
config_load "${NAME}"
config_foreach dropbear_instance dropbear
}
service_triggers()
{
procd_add_config_trigger "dropbear" "/etc/init.d/dropbear" "restart"
}
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
}
|
