#!/bin/sh /etc/rc.common
+#
+# Copyright (C) 2010-2015 OpenWrt.org
+# Copyright (C) 2010 segal.di.ubi.pt
+#
START=99
STOP=01
+USE_PROCD=1
-PIDFILE="/tmp/run/sshtunnel"
+PROG=/usr/bin/ssh
+_log() {
+ logger -p daemon.info -t sshtunnel "$@"
+}
+
+_err() {
+ logger -p daemon.err -t sshtunnel "$@"
+}
append_params() {
- local p; local v; local args;
+ local p v args
for p in $*; do
eval "v=\$$p"
[ -n "$v" ] && args="$args -o $p=$v"
done
-
+
ARGS_options="${args# *}"
}
eval "$varname=\$new"
}
+validate_server_section() {
+ uci_validate_section sshtunnel server "$1" \
+ 'user:string(1)' \
+ 'hostname:host' \
+ 'port:port' \
+ 'retrydelay:min(1):60' \
+ 'PKCS11Provider:file' \
+ 'CheckHostIP:or("yes", "no")' \
+ 'Compression:or("yes", "no")' \
+ 'CompressionLevel:range(1,9)' \
+ 'IdentityFile:file' \
+ 'LogLevel:or("QUIET", "FATAL", "ERROR", "INFO", "VERBOSE", "DEBUG", "DEBUG1", "DEBUG2", "DEBUG3"):INFO' \
+ 'ServerAliveCountMax:min(1)' \
+ 'ServerAliveInterval:min(1)' \
+ 'StrictHostKeyChecking:or("yes", "no")' \
+ 'TCPKeepAlive:or("yes", "no")' \
+ 'VerifyHostKeyDNS:or("yes", "no")'
+}
+
+validate_tunnelR_section() {
+ uci_validate_section sshtunnel tunnelR "$1" \
+ 'remoteaddress:or(host, "*"):*' \
+ 'remoteport:port' \
+ 'localaddress:host' \
+ 'localport:port'
+}
+
+validate_tunnelL_section() {
+ uci_validate_section sshtunnel tunnelL "$1" \
+ 'remoteaddress:host' \
+ 'remoteport:port' \
+ 'localaddress:or(host, "*"):*' \
+ 'localport:port'
+}
+
+validate_tunnelD_section() {
+ uci_validate_section sshtunnel tunnelD "$1" \
+ 'localaddress:or(host, "*"):*' \
+ 'localport:port'
+}
+
+validate_tunnelW_section() {
+ uci_validate_section sshtunnel tunnelW "$1" \
+ 'vpntype:or("ethernet", "point-to-point"):point-to-point' \
+ 'localdev:or("any", min(1))' \
+ 'remotedev:or("any", min(1))'
+}
+
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
+ config_get section_server "$1" "server"
+
+ # continue to read next section if this is not for the current server
+ [ "$server" = "$section_server" ] || return 0
+
+ # validate and load this remote tunnel config
+ local remoteaddress remoteport localaddress localport
+ validate_tunnelR_section "$1" || { _err "tunnelR ${1}: validation failed"; return 1; }
+
+ [ -n "$remoteport" -a -n "$localport" -a -n "$remoteaddress" ] || { _err "tunnelR ${1}: missing required options"; return 1; }
+ # count nr of valid sections to make sure there are at least one
+ let count++
+
+ _log "tunnelR at ${server}: -R $remoteaddress:$remoteport:$localaddress:$localport"
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 section_server "$1" "server"
+
+ # continue to read next section if this is not for the current server
+ [ "$server" = "$section_server" ] || return 0
- config_get localaddress $1 localaddress "*"
- config_get localport $1 localport
- config_get remoteaddress $1 remoteaddress
- config_get remoteport $1 remoteport
+ # validate and load this remote tunnel config
+ local remoteaddress remoteport localaddress localport
+ validate_tunnelL_section "$1" || { _err "tunnelL ${1}: validation failed"; return 1; }
- [ "$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
+ [ -n "$remoteport" -a -n "$localport" -a -n "$remoteaddress" ] || { _err "tunnelL ${1}: missing required options"; return 1; }
+ # count nr of valid sections to make sure there are at least one
+ let count++
+
+ _log "tunnelL at ${server}: -L $localaddress:$localport:$remoteaddress:$remoteport"
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 section_server "$1" "server"
+
+ # continue to read next section if this is not for the current server
+ [ "$server" = "$section_server" ] || return 0
- config_get localaddress $1 localaddress "*"
- config_get localport $1 localport
+ # validate and load this remote tunnel config
+ local localaddress localport
+ validate_tunnelD_section "$1" || { _err "tunnelD ${1}: validation failed"; return 1; }
- [ "$localport" -gt 0 ] || append_string "error" "[tunnelD: $1]localport must be a positive integer" "; "
- [ -n "$error" ] && return 1
+ [ -n "$localport" ] || { _err "tunnelD ${1}: missing localport"; return 1; }
+ # count nr of valid sections to make sure there are at least one
+ let count++
+
+ _log "proxy via ${server}: -D $localaddress:$localport"
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 section_server "$1" "server"
+
+ # continue to read next section if this is not for the current server
+ [ "$server" = "$section_server" ] || return 0
+
+ # validate and load this remote tunnel config
+ local localdev remotedev vpntype
+ validate_tunnelW_section "$1" || { _err "tunnelW ${1}: validation failed"; return 1; }
+
+ [ -n "$vpntype" -a -n "$localdev" -a -n "$remotedev" ] || { _err "tunnelW $1: missing or bad options"; return 1; }
- config_get localdev $1 localdev "*"
- config_get remotedev $1 remotedev "*"
- config_get vpntype $1 vpntype "*"
+ [ "$user" == "root" ] || { _err "tunnelW ${1}: root is required for tun"; return 1; }
- [ "$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
+ # count nr of valid sections to make sure there are at least one
+ let count++
- append_string "ARGS_tunnels" "-w $localdev:$remotedev -o Tunnel=$vpntype"
+ _log "tunnelW to ${server}: -w $localdev:$remotedev -o Tunnel=$vpntype"
+ append_string "ARGS_tunnels" "-w $localdev:$remotedev -o Tunnel=$vpntype"
}
load_server() {
server="$1"
+ local user hostname port retrydelay PKCS11Provider CheckHostIP Compression \
+ CompressionLevel IdentityFile LogLevel ServerAliveCountMax \
+ ServerAliveInterval StrictHostKeyChecking TCPKeepAlive VerifyHostKeyDNS
- 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 - $error"; return; }
-
+ validate_server_section "$server" || { _err "server ${server}: validation failed"; return 1; }
ARGS=""
ARGS_options=""
- ARGS_tunnels=""
-
+ ARGS_tunnels=""
count=0
- config_foreach load_tunnelR tunnelR && config_foreach load_tunnelL tunnelL && config_foreach load_tunnelD tunnelD
- [ -n "$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 $server not started - no tunnels defined"; return; }
- append_params CheckHostIP Compression CompressionLevel IdentityFile LogLevel PKCS11Provider ServerAliveCountMax ServerAliveInterval StrictHostKeyChecking TCPKeepAlive VerifyHostKeyDNS
+ config_foreach load_tunnelR "tunnelR"
+ config_foreach load_tunnelL "tunnelL"
+ config_foreach load_tunnelD "tunnelD"
+ config_foreach load_tunnelW "tunnelW"
+ [ "$count" -eq 0 ] && { _err "tunnels to ${server} not started - no tunnels defined"; return 1; }
+
+ append_params CheckHostIP Compression CompressionLevel IdentityFile \
+ LogLevel PKCS11Provider ServerAliveCountMax ServerAliveInterval \
+ StrictHostKeyChecking TCPKeepAlive VerifyHostKeyDNS
+
ARGS="$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
+ procd_open_instance "$server"
+ procd_set_param command "$PROG" $ARGS
+ procd_set_param stdout 1
+ procd_set_param stderr 1
+ procd_set_param respawn 0 "$retrydelay" 1
+ procd_close_instance
+}
+
+start_service() {
+ config_load "sshtunnel"
+ config_foreach load_server "server"
+}
+
+service_triggers() {
+ procd_add_reload_trigger "sshtunnel"
+
+ procd_open_validate
+ validate_server_section
+ validate_tunnelR_section
+ validate_tunnelL_section
+ validate_tunnelD_section
+ validate_tunnelW_section
+ procd_close_validate
}
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