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#!/bin/sh /etc/rc.common
START=99
STOP=01
PIDFILE="/tmp/run/sshtunnel"
append_params() {
local p; local v; local args;
for p in $*; do
eval "v=\$$p"
[ -n "$v" ] && args="$args -o $p=$v"
done
ARGS_options="${args# *}"
}
append_string() {
local varname="$1"; local add="$2"; local separator="${3:- }"; local actual
eval "actual=\$$varname"
new="${actual:+$actual$separator}$add"
eval "$varname=\$new"
}
load_tunnelR() {
config_get section_server $1 server
[ "$server" = "$section_server" ] || return 0 # continue to read next section if this is not for the current server
let count++ # count nr of valid sections to make sure there are at least one
config_get remoteaddress $1 remoteaddress "*"
config_get remoteport $1 remoteport
config_get localaddress $1 localaddress
config_get localport $1 localport
[ "$remoteport" -gt 0 ] || append_string "error" "[tunnelR: $1]remoteport must be a positive integer" "; "
[ "$localport" -gt 0 ] || append_string "error" "[tunnelR: $1]localport must be a positive integer" "; "
[ -n "$error" ] && return 1
append_string "ARGS_tunnels" "-R $remoteaddress:$remoteport:$localaddress:$localport"
}
load_tunnelL() {
config_get section_server $1 server
[ "$server" = "$section_server" ] || return 0 # continue to read next section if this is not for the current server
let count++ # count nr of valid sections to make sure there are at least one
config_get localaddress $1 localaddress "*"
config_get localport $1 localport
config_get remoteaddress $1 remoteaddress
config_get remoteport $1 remoteport
[ "$remoteport" -gt 0 ] || append_string "error" "[tunnelL: $1]remoteport must be a positive integer" "; "
[ "$localport" -gt 0 ] || append_string "error" "[tunnelL: $1]localport must be a positive integer" "; "
[ -n "$error" ] && return 1
append_string "ARGS_tunnels" "-L $localaddress:$localport:$remoteaddress:$remoteport"
}
load_tunnelD() {
config_get section_server $1 server
[ "$server" = "$section_server" ] || return 0 # continue to read next section if this is not for the current server
let count++ # count nr of valid sections to make sure there are at least one
config_get localaddress $1 localaddress "*"
config_get localport $1 localport
[ "$remoteport" -gt 0 ] || append_string "error" "[tunnelD: $1]remoteport must be a positive integer" "; "
[ "$localport" -gt 0 ] || append_string "error" "[tunnelD: $1]localport must be a positive integer" "; "
[ -n "$error" ] && return 1
append_string "ARGS_tunnels" "-D $localaddress:$localport"
}
load_tunnelW() {
config_get section_server $1 server
[ "$server" = "$section_server" ] || return 0 # continue to read next section if this is not for the current server
let count++ # count nr of valid sections to make sure there are at least one
config_get localdev $1 localdev "*"
config_get remotedev $1 remotedev "*"
config_get vpntype $1 vpntype "*"
[ "$vpntype" == "ethernet" ] || [ "$vpntype" == "point-to-point" ] || append_string "error" "[tunnelW: $1] vpntype must be \"ethernet\" (tap) or \"pointopoint\" (tun)" "; "
[ "$localdev" == "any" ] || [ "$localdev" -ge 0 ] || append_string "error" "[tunnelW: $1] localdev must be an integer or \"any\"" "; "
[ "$remotedev" == "any" ] || [ "$remotedev" -ge 0 ] || append_string "error" "[tunnelW: $1] remotedev must be an integer or \"any\"" "; "
[ "$user" == "root" ] || logger -p user.warn -t "sshtunnel" "warning: root is required unless the tunnel device has been created manually"
[ -n "$error" ] && return 1
append_string "ARGS_tunnels" "-w $localdev:$remotedev -o Tunnel=$vpntype"
}
load_server() {
server="$1"
config_get user $1 user
config_get hostname $1 hostname
config_get port $1 port "22"
config_get retrydelay $1 retrydelay "60"
config_get PKCS11Provider $1 PKCS11Provider
config_get CheckHostIP $1 CheckHostIP
config_get Compression $1 Compression
config_get CompressionLevel $1 CompressionLevel
config_get IdentityFile $1 IdentityFile
config_get LogLevel $1 LogLevel
config_get ServerAliveCountMax $1 ServerAliveCountMax
config_get ServerAliveInterval $1 ServerAliveInterval
config_get StrictHostKeyChecking $1 StrictHostKeyChecking
config_get TCPKeepAlive $1 TCPKeepAlive
config_get VerifyHostKeyDNS $1 VerifyHostKeyDNS
error=""
[ -n "$user" ] \
|| append_string "error" "user is not set" "; "
[ -n "$hostname" ] \
|| append_string "error" "hostname is not set" "; "
[ "$retrydelay" -ge 1 ] \
|| append_string "error" "retrydelay must be a positive integer" "; "
[ -z "$PKCS11Provider" -o -f "$PKCS11Provider" ] \
|| append_string "error" "PKCS11Provider must be a pkcs11 shared library accessible" "; "
[ -z "$CheckHostIP" -o "$CheckHostIP"="yes" -o "$CheckHostIP"="no" ] \
|| append_string "error" "CheckHostIP must be 'yes' or 'no'" "; "
[ -z "$Compression" -o "$Compression"="yes" -o "$Compression"="no" ] \
|| append_string "error" "Compression must be 'yes' or 'no'" "; "
[ -z "$CompressionLevel" ] || [ "$CompressionLevel" -ge 1 -a "$CompressionLevel" -le 9 ] \
|| append_string "error" "CompressionLevel must be between 1 and 9" "; "
[ -z "$IdentityFile" -o -f "$IdentityFile" ] \
|| append_string "error" "IdentityFile $IdentityFile not accessible" "; "
[ -z "$LogLevel" -o "$LogLevel" = "QUIET" -o "$LogLevel" = "FATAL" -o "$LogLevel" = "ERROR" -o \
"$LogLevel" = "INFO" -o "$LogLevel" = "VERBOSE" -o "$LogLevel" = "DEBUG" -o \
"$LogLevel" = "DEBUG1" -o "$LogLevel" = "DEBUG2" -o "$LogLevel" = "DEBUG3" ] \
|| append_string "error" "LogLevel is invalid" "; "
[ -z "$ServerAliveCountMax" ] || [ "$ServerAliveCountMax" -ge 1 ] \
|| append_string "error" "ServerAliveCountMax must be greater or equal than 1" "; "
[ -z "$ServerAliveInterval" ] || [ "$ServerAliveInterval" -ge 0 ] \
|| append_string "error" "ServerAliveInterval must be greater or equal than 0" "; "
[ -z "$StrictHostKeyChecking" -o "$StrictHostKeyChecking" = "yes" -o "$StrictHostKeyChecking" = "ask" -o "$StrictHostKeyChecking" = "no" ] \
|| append_string "error" "StrictHostKeyChecking must be 'yes', 'ask' or 'no'" "; "
[ -z "$TCPKeepAlive" -o "$TCPKeepAlive" = "yes" -o "$TCPKeepAlive" = "no" ] \
|| append_string "error" "TCPKeepAlive must be 'yes' or 'no'" "; "
[ -z "$VerifyHostKeyDNS" -o "$VerifyHostKeyDNS" = "yes" -o "$VerifyHostKeyDNS" = "no" ] \
|| append_string "error" "VerifyHostKeyDNS must be 'yes' or 'no'" "; "
[ -n "$error" ] && { logger -p user.err -t "sshtunnel" "tunnels to $server not started - $error"; return; }
ARGS=""
ARGS_options=""
ARGS_tunnels=""
count=0
config_foreach load_tunnelR tunnelR && config_foreach load_tunnelL tunnelL && config_foreach load_tunnelD tunnelD
[ -n "$error" ] && { logger -p user.err -t "sshtunnel" "tunnels to $server not started - $error"; return; }
[ "$count" -eq 0 ] && { logger -p user.err -t "sshtunnel" "tunnels to $server not started - no tunnels defined"; return; }
append_params CheckHostIP Compression CompressionLevel IdentityFile LogLevel PKCS11Provider ServerAliveCountMax ServerAliveInterval StrictHostKeyChecking TCPKeepAlive VerifyHostKeyDNS
ARGS="$ARGS_options -o ExitOnForwardFailure=yes -o BatchMode=yes -nN $ARGS_tunnels -p $port $user@$hostname"
/usr/bin/sshtunnel.sh "$ARGS" "$retrydelay" "$server" &
echo $! >> "${PIDFILE}.pids"
logger -p user.info -t "sshtunnel" "started tunnels to $server (pid=$!;retrydelay=$retrydelay)"
}
stop() {
if [ -f "$PIDFILE".pids ]
then
logger -p user.info -t "sshtunnel" "stopping all tunnels"
while read pid
do
kill "$pid" # kill mother process first
[ -f "${PIDFILE}_${pid}.pid" ] && { # if ssh was running, kill it also (mother process could be in retry wait)
start-stop-daemon -K -p "${PIDFILE}_${pid}.pid"
rm "${PIDFILE}_${pid}.pid"
}
logger -p daemon.info -t "sshtunnel[$pid]" "tunnel stopped"
done < "${PIDFILE}.pids"
rm "${PIDFILE}.pids"
logger -p user.info -t "sshtunnel" "all tunnels stopped"
else
logger -p user.info -t "sshtunnel" "no tunnels running"
fi
}
start() {
[ -f "${PIDFILE}.pids" ] && stop
config_load sshtunnel
if [ -n "$(uci show sshtunnel.@server[0])" ] # at least one server section exists
then
logger -p user.info -t "sshtunnel" "starting all tunnels"
config_foreach load_server server
logger -p user.info -t "sshtunnel" "all tunnels started"
else
logger -p user.info -t "sshtunnel" "no servers defined"
fi
}