net/ddns-scripts/files/usr/lib/ddns/dynamic_dns_lucihelper.sh

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