net/ddns-scripts/files/dynamic_dns_lucihelper.sh

   1 #!/bin/sh
   2 # /usr/lib/ddns/luci_dns_helper.sh
   3 #
   4 #.Distributed under the terms of the GNU General Public License (GPL) version 2.0
   5 #
   6 # Written in August 2014 by
   7 #.Christian Schoenebeck <christian dot schoenebeck at gmail dot com>
   8 # This script is used by luci-app-ddns
   9 # - getting registered IP
  10 # - check if possible to get local IP
  11 # - verifing given DNS- or Proxy-Server
  12 #
  13 # variables in small chars are read from /etc/config/ddns as parameter given here
  14 # variables in big chars are defined inside these scripts as gloval vars
  15 # variables in big chars beginning with "__" are local defined inside functions only
  16 # set -vx       #script debugger
  17
  18 [ $# -lt 2 ] && exit 1
  19
  20 . /usr/lib/ddns/dynamic_dns_functions.sh        # global vars are also defined here
  21
  22 # preset some variables, wrong or not set in dynamic_dns_functions.sh
  23 SECTION_ID="lucihelper"
  24 LOGFILE="$LOGDIR/$SECTION_ID.log"
  25 DATFILE="$RUNDIR/$SECTION_ID.$$.dat"    # save stdout data of WGet and other extern programs called
  26 ERRFILE="$RUNDIR/$SECTION_ID.$$.err"    # save stderr output of WGet and other extern programs called
  27 VERBOSE_MODE=0          # no console logging
  28 # global variables normally set by reading DDNS UCI configuration
  29 use_syslog=0            # no syslog
  30 use_logfile=0           # by default no logfile, can be changed here
  31
  32 __RET=0
  33 case "$1" in
  34         get_registered_ip)
  35                 local IP
  36                 lookup_host=$2                  # FQDN of host registered at DDNS
  37                 use_ipv6=${3:-"0"}              # Use IPv6 - default IPv4
  38                 force_ipversion=${4:-"0"}       # Force IP Version - default 0 - No
  39                 force_dnstcp=${5:-"0"}          # Force TCP on DNS - default 0 - No
  40                 dns_server=${6:-""}             # DNS server - default No DNS
  41                 write_log 7 "-----> get_registered_ip IP"
  42                 get_registered_ip IP
  43                 __RET=$?
  44                 [ $__RET -ne 0 ] && IP=""
  45                 echo -n "$IP"                   # suppress LF
  46                 ;;
  47         verify_dns)
  48                 # $2 : dns-server to verify     # no need for force_dnstcp because
  49                                                 # verify with nc (netcat) uses tcp anyway
  50                 use_ipv6=${3:-"0"}              # Use IPv6 - default IPv4
  51                 force_ipversion=${4:-"0"}       # Force IP Version - default 0 - No
  52                 write_log 7 "-----> verify_dns '$2'"
  53                 verify_dns "$2"
  54                 __RET=$?
  55                 ;;
  56         verify_proxy)
  57                 # $2 : proxy string to verify
  58                 use_ipv6=${3:-"0"}              # Use IPv6 - default IPv4
  59                 force_ipversion=${4:-"0"}       # Force IP Version - default 0 - No
  60                 write_log 7 "-----> verify_proxy '$2'"
  61                 verify_proxy "$2"
  62                 __RET=$?
  63                 ;;
  64         get_local_ip)
  65                 local IP
  66                 use_ipv6="$2"                   # Use IPv6
  67                 ip_source="$3"                  # IP source
  68                 ip_network="$4"                 # set if source = "network" otherwise "-"
  69                 ip_url="$5"                     # set if source = "web" otherwise "-"
  70                 ip_interface="$6"               # set if source = "interface" itherwiase "-"
  71                 ip_script="$7"                  # set if source = "script" otherwise "-"
  72                 proxy="$8"                      # proxy if set
  73                 force_ipversion="0"             # not needed but must be set
  74                 use_https="0"                   # not needed but must be set
  75                 [ -n "$proxy" -a "$ip_source" = "web" ] && {
  76                         # proxy defined, used for ip_source=web
  77                         export HTTP_PROXY="http://$proxy"
  78                         export HTTPS_PROXY="http://$proxy"
  79                         export http_proxy="http://$proxy"
  80                         export https_proxy="http://$proxy"
  81                 }
  82                 # don't need IP only the return code
  83                 [ "$ip_source" = "web" -o  "$ip_source" = "script" ] && {
  84                         # we wait only 3 seconds for an
  85                         # answer from "web" or "script"
  86                         write_log 7 "-----> timeout 3 -- get_local_ip IP"
  87                         timeout 3 -- get_local_ip IP
  88                 } || {
  89                         write_log 7 "-----> get_local_ip IP"
  90                         get_local_ip IP
  91                 }
  92                 __RET=$?
  93                 ;;
  94         *)
  95                 __RET=255
  96                 ;;
  97 esac
  98
  99 # remove out and err file
 100 [ -f $DATFILE ] && rm -f $DATFILE
 101 [ -f $ERRFILE ] && rm -f $ERRFILE
 102 return $__RET