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#!/bin/sh
# /usr/lib/ddns/luci_dns_helper.sh
#
#.Distributed under the terms of the GNU General Public License (GPL) version 2.0
#
# Written in August 2014 by
#.Christian Schoenebeck <christian dot schoenebeck at gmail dot com>
# This script is used by luci-app-ddns
# - getting registered IP
# - check if possible to get local IP
# - verifing given DNS- or Proxy-Server
#
# variables in small chars are read from /etc/config/ddns as parameter given here
# variables in big chars are defined inside these scripts as gloval vars
# variables in big chars beginning with "__" are local defined inside functions only
# set -vx #script debugger
[ $# -lt 2 ] && exit 1
. /usr/lib/ddns/dynamic_dns_functions.sh # global vars are also defined here
# preset some variables, wrong or not set in dynamic_dns_functions.sh
SECTION_ID="lucihelper"
LOGFILE="$LOGDIR/$SECTION_ID.log"
DATFILE="$RUNDIR/$SECTION_ID.$$.dat" # save stdout data of WGet and other extern programs called
ERRFILE="$RUNDIR/$SECTION_ID.$$.err" # save stderr output of WGet and other extern programs called
VERBOSE_MODE=0 # no console logging
# global variables normally set by reading DDNS UCI configuration
use_syslog=0 # no syslog
use_logfile=0 # by default no logfile, can be changed here
__RET=0
case "$1" in
get_registered_ip)
local IP
lookup_host=$2 # FQDN of host registered at DDNS
use_ipv6=${3:-"0"} # Use IPv6 - default IPv4
force_ipversion=${4:-"0"} # Force IP Version - default 0 - No
force_dnstcp=${5:-"0"} # Force TCP on DNS - default 0 - No
dns_server=${6:-""} # DNS server - default No DNS
write_log 7 "-----> get_registered_ip IP"
get_registered_ip IP
__RET=$?
[ $__RET -ne 0 ] && IP=""
echo -n "$IP" # suppress LF
;;
verify_dns)
# $2 : dns-server to verify # no need for force_dnstcp because
# verify with nc (netcat) uses tcp anyway
use_ipv6=${3:-"0"} # Use IPv6 - default IPv4
force_ipversion=${4:-"0"} # Force IP Version - default 0 - No
write_log 7 "-----> verify_dns '$2'"
verify_dns "$2"
__RET=$?
;;
verify_proxy)
# $2 : proxy string to verify
use_ipv6=${3:-"0"} # Use IPv6 - default IPv4
force_ipversion=${4:-"0"} # Force IP Version - default 0 - No
write_log 7 "-----> verify_proxy '$2'"
verify_proxy "$2"
__RET=$?
;;
get_local_ip)
local IP
use_ipv6="$2" # Use IPv6
ip_source="$3" # IP source
ip_network="$4" # set if source = "network" otherwise "-"
ip_url="$5" # set if source = "web" otherwise "-"
ip_interface="$6" # set if source = "interface" itherwiase "-"
ip_script="$7" # set if source = "script" otherwise "-"
proxy="$8" # proxy if set
force_ipversion="0" # not needed but must be set
use_https="0" # not needed but must be set
[ -n "$proxy" -a "$ip_source" = "web" ] && {
# proxy defined, used for ip_source=web
export HTTP_PROXY="http://$proxy"
export HTTPS_PROXY="http://$proxy"
export http_proxy="http://$proxy"
export https_proxy="http://$proxy"
}
# don't need IP only the return code
[ "$ip_source" = "web" -o "$ip_source" = "script" ] && {
# we wait only 3 seconds for an
# answer from "web" or "script"
write_log 7 "-----> timeout 3 -- get_local_ip IP"
timeout 3 -- get_local_ip IP
} || {
write_log 7 "-----> get_local_ip IP"
get_local_ip IP
}
__RET=$?
;;
*)
__RET=255
;;
esac
# remove out and err file
[ -f $DATFILE ] && rm -f $DATFILE
[ -f $ERRFILE ] && rm -f $ERRFILE
return $__RET