From: Felix Fietkau Date: Wed, 2 Apr 2008 09:24:49 +0000 (+0000) Subject: add ddns-scripts (package by Eric Bishop) X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=7523ff480e43cc4b2d006d318255684a31288748;p=openwrt%2Fsvn-archive%2Fpackages.git add ddns-scripts (package by Eric Bishop) SVN-Revision: 10705 --- diff --git a/net/ddns-scripts/Makefile b/net/ddns-scripts/Makefile new file mode 100644 index 000000000..ecfebbb65 --- /dev/null +++ b/net/ddns-scripts/Makefile @@ -0,0 +1,36 @@ +include $(TOPDIR)/rules.mk + +PKG_NAME:=ddns-scripts +PKG_VERSION:=1.0.0 +PKG_RELEASE:=1 + +PKG_BUILD_DIR := $(BUILD_DIR)/$(PKG_NAME) + +include $(INCLUDE_DIR)/package.mk + +define Package/ddns-scripts + SECTION:=net + CATEGORY:=Network + TITLE:=Dynamic DNS Scripts +endef + +define Package/ddns-scripts/description + A highly configurable set of scripts for doing + dynamic dns updates +endef + +define Build/Prepare +endef + +define Build/Configure +endef + +define Build/Compile +endef + +define Package/ddns-scripts/install + $(INSTALL_DIR) $(1) + $(CP) ./files/* $(1)/ +endef + +$(eval $(call BuildPackage,ddns-scripts)) diff --git a/net/ddns-scripts/files/etc/config/ddns b/net/ddns-scripts/files/etc/config/ddns new file mode 100644 index 000000000..7c3f3c1a7 --- /dev/null +++ b/net/ddns-scripts/files/etc/config/ddns @@ -0,0 +1,85 @@ +################################################################# +# In order to enable dynamic dns you need at least one section, +# and in that seciton the "enabled" option must be set to one +# +# Each section represents an update to a different service +# +# You specify your domain name, your username and your password +# with the optins "domain", "username" and "password" respectively +# +# Next you need to specify the name of the service you are +# connecting to "eg. dyndns.org". The format of the update +# urls for several different dynamic dns services is specified +# in the /usr/lib/ddns/services file. This list is hardly complete +# as there are many, many different dynamic dns services. If your +# service is on the list you can merely specify it with the +# "service_name" option. Otherwise you will need to determine +# the format of the url to update with. You can either add an +# entry to the /usr/lib/ddns/services file or specify this with +# the "update_url" option. +# +# We also need to specify the source of the ip address to associate with +# your domain. The "ip_source" option can be "network", "interface" +# or "web", with "network" as the default. +# +# If "ip_source" is "network" you specify a network section in your +# /etc/network config file (e.g. "wan", which is the default) with +# the "ip_network" option. If you specify "wan", you will update +# with whatever the ip for your wan is. +# +# If "ip_source" is "interface" you specify a hardware interface +# (e.g. "eth1") and whatever the current ip of this interface is +# will be associated with the domain when an update is performed. +# +# The last possibility is that "ip_source" is "web", which means +# that in order to obtain our ip address we will connect to a +# website, and the first valid ip address listed on that page +# will be assumed to be ours. If you are behind another firewall +# this is the best option since none of the local networks or +# interfaces will have the external ip. The website to connect +# to is specified by the "ip_url" option. You may specify multiple +# urls in the option, separated by whitespace. +# +# Finally we need to specify how often to check whether we need +# to check whether the ip address has changed (and if so update +# it) and how often we need to force an update ( many services +# will expire your domain if you don't connect and do an update +# every so often). Use the "check_interval" to specify how +# often to check whether an update is necessary, and the +# "force_interval" option to specify how often to force an +# update. Specify the units for these values with the "check_unit" +# and the "force_unit" options. Units can be "days", "hours", +# "minutes" or "seconds". The default force_unit is hours and the +# default check_unit is seconds. The default check_interval is +# 600 seconds, or ten minutes. The default force_interval is +# 72 hours or 3 days. +# +# +######################################################### + +config service "myddns" + option enabled "0" + + option service_name "dyndns.org" + option domain "mypersonaldomain.dyndns.org" + option username "myusername" + option password "mypassword" + + option ip_source "network" + option ip_network "wan" + + + option force_interval "72" + option force_unit "hours" + option check_interval "10" + option check_unit "minutes" + + #option ip_source "interface" + #option ip_interface "eth0.1" + + #option ip_source "web" + #option ip_url "http://www.whatismyip.com/automation/n09230945.asp" + + #option update_url "http://[USERNAME]:[PASSWORD]@members.dyndns.org/nic/update?hostname=[DOMAIN]&myip=[IP]" + + diff --git a/net/ddns-scripts/files/etc/hotplug.d/iface/25-ddns b/net/ddns-scripts/files/etc/hotplug.d/iface/25-ddns new file mode 100644 index 000000000..a548f0d94 --- /dev/null +++ b/net/ddns-scripts/files/etc/hotplug.d/iface/25-ddns @@ -0,0 +1,17 @@ +#!/bin/sh + +. /usr/lib/ddns/dynamic_dns_functions.sh + +config_load "network" +config_get wan_proto "wan" "proto" + +#only start if we're bringing up wan and ppp isn't being used +#if ppp, it's better to use the /etc/ppp/ip-up.d because ip +#changes will trigger this directory to be run while only +#an interface going up or down will trigger this +if [ "$INTERFACE" = "wan" ] && [ "$ACTION" = "ifup" ] && [ "$wan_proto" != 'pppoe' ] +then + start_daemon_for_all_ddns_sections +fi + + diff --git a/net/ddns-scripts/files/etc/ppp/ip-up.d/25-ddns b/net/ddns-scripts/files/etc/ppp/ip-up.d/25-ddns new file mode 100644 index 000000000..46ab72a29 --- /dev/null +++ b/net/ddns-scripts/files/etc/ppp/ip-up.d/25-ddns @@ -0,0 +1,6 @@ +#!/bin/sh + +. /usr/lib/ddns/dynamic_dns_functions.sh + +start_daemon_for_all_ddns_sections + diff --git a/net/ddns-scripts/files/usr/lib/ddns/dynamic_dns_functions.sh b/net/ddns-scripts/files/usr/lib/ddns/dynamic_dns_functions.sh new file mode 100644 index 000000000..07ea4b8ff --- /dev/null +++ b/net/ddns-scripts/files/usr/lib/ddns/dynamic_dns_functions.sh @@ -0,0 +1,121 @@ +# /usr/lib/dynamic_dns/dynamic_dns_functions.sh +# +# Written by Eric Paul Bishop, Janary 2008 +# Distributed under the terms of the GNU General Public License (GPL) version 2.0 +# +# This script is (loosely) based on the one posted by exobyte in the forums here: +# http://forum.openwrt.org/viewtopic.php?id=14040 + + + +. /etc/functions.sh +include /lib/network + + +#loads all options for a given package and section +#also, sets all_option_variables to a list of the variable names +load_all_config_options() +{ + pkg_name="$1" + section_id="$2" + + ALL_OPTION_VARIABLES="" + # this callback loads all the variables + # in the section_id section when we do + # config_load. We need to redefine + # the option_cb for different sections + # so that the active one isn't still active + # after we're done with it. For reference + # the $1 variable is the name of the option + # and $2 is the name of the section + config_cb() + { + if [ ."$2" = ."$section_id" ]; then + option_cb() + { + ALL_OPTION_VARIABLES="$ALL_OPTION_VARIABLES $1" + } + else + option_cb() { return 0; } + fi + } + + + config_load "$pkg_name" + for var in $ALL_OPTION_VARIABLES + do + config_get "$var" "$section_id" "$var" + done +} + + +get_current_ip() +{ + + #if ip source is not defined, assume we want to get ip from wan + if [ "$ip_source" != "interface" ] && [ "$ip_source" != "web" ] + then + ip_source="network" + ip_network="wan" + fi + + if [ "$ip_source" = "network" ] + then + if [ -z "$ip_network" ] + then + ip_network="wan" + fi + scan_interfaces + config_load /var/state/network + config_get ip_interface $ip_network ifname + fi + + current_ip=''; + if [ "$ip_source" = "network" ] || [ "$ip_source" = "interface" ] + then + current_ip=$(ifconfig $ip_interface | grep -o 'inet addr:[0-9.]*' | grep -o "$ip_regex") + else + # get ip from web + # we check each url in order in ip_url variable, and if no ips are found we use dyndns ip checker + # ip is set to FIRST expression in page that matches the ip_regex regular expression + for addr in $ip_url + do + if [ -z "$current_ip" ] + then + current_ip=$(echo $( wget -O - $addr 2>/dev/null) | grep -o "$ip_regex") + fi + done + + #here we hard-code the dyndns checkip url in case no url was specified + if [ -z "$current_ip" ] + then + current_ip=$(echo $( wget -O - http://checkip.dyndns.org 2>/dev/null) | grep -o "$ip_regex") + fi + fi + + echo "$current_ip" +} + + +verbose_echo() +{ + if [ "$verbose_mode" = 1 ] + then + echo $1 + fi +} + +start_daemon_for_all_ddns_sections() +{ + SECTIONS="" + config_cb() + { + SECTIONS="$SECTIONS $2" + } + config_load "ddns" + + for section in $SECTIONS + do + /usr/lib/ddns/dynamic_dns_updater.sh $section 0& + done +} diff --git a/net/ddns-scripts/files/usr/lib/ddns/dynamic_dns_updater.sh b/net/ddns-scripts/files/usr/lib/ddns/dynamic_dns_updater.sh new file mode 100644 index 000000000..fde13b7db --- /dev/null +++ b/net/ddns-scripts/files/usr/lib/ddns/dynamic_dns_updater.sh @@ -0,0 +1,309 @@ +#!/bin/sh +# /usr/lib/dynamic_dns/dynamic_dns_updater.sh +# +# Written by Eric Paul Bishop, Janary 2008 +# Distributed under the terms of the GNU General Public License (GPL) version 2.0 +# +# This script is (loosely) based on the one posted by exobyte in the forums here: +# http://forum.openwrt.org/viewtopic.php?id=14040 +# + +. /usr/lib/ddns/dynamic_dns_functions.sh +. /usr/lib/ddns/shell_get.sh + + + + + + +service_id=$1 +if [ -z "$service_id" ] +then + echo "ERRROR: You must specify a service id (the section name in the /etc/config/ddns file) to initialize dynamic DNS." + return 1 +fi + +#default mode is verbose_mode, but easily turned off with second parameter +verbose_mode="1" +if [ -n "$2" ] +then + verbose_mode="$2" +fi + +############################################################### +# Leave this comment here, to clearly document variable names +# that are expected/possible +# +# Now use load_all_config_options to load config +# options, which is a much more flexible solution. +# +# +#config_load "ddns" +# +#config_get enabled $service_id enabled +#config_get service_name $service_id service_name +#config_get update_url $service_id update_url +# +# +#config_get username $service_id username +#config_get password $service_id password +#config_get domain $service_id domain +# +# +#config_get ip_source $service_id ip_source +#config_get ip_interface $service_id ip_interface +#config_get ip_network $service_id ip_network +#config_get ip_url $service_id ip_url +# +#config_get force_interval $service_id force_interval +#config_get force_unit $service_id force_unit +# +#config_get check_interval $service_id check_interval +#config_get check_unit $service_id check_unit +######################################################### +load_all_config_options "ddns" "$service_id" + + +#some defaults +if [ -z "$check_interval" ] +then + check_interval=600 +fi + +if [ -z "$check_unit" ] +then + check_unit="seconds" +fi + + +if [ -z "$force_interval" ] +then + force_interval=72 +fi + +if [ -z "$force_unit" ] +then + force_unit="hours" +fi + + + +#some constants + +retrieve_prog="/usr/bin/wget --no-check-certificate -O - "; +if [ -h "/usr/bin/wget" ] +then + busybox_wget=$(ls -l /usr/bin/wget | awk ' { if ($0~/busybox/) { print "BUSYBOX"}} ') + if [ -n "$busybox_wget" ]; then + retrieve_prog="shell_get" + fi +fi + +verbose_echo "retrieve_prog=\"$retrieve_prog\"" + +service_file="/usr/lib/ddns/services" + +ip_regex="[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}" + +NEWLINE_IFS=' +' + + +#determine what update url we're using if the service_name is supplied +if [ -n "$service_name" ] +then + #remove any lines not containing data, and then make sure fields are enclosed in double quotes + quoted_services=$(cat $service_file | grep "^[\t ]*[^#]" | awk ' gsub("\x27", "\"") { if ($1~/^[^\"]*$/) $1="\""$1"\"" }; { if ( $NF~/^[^\"]*$/) $NF="\""$NF"\"" }; { print $0 }' ) + + + #echo "quoted_services = $quoted_services" + OLD_IFS=$IFS + IFS=$NEWLINE_IFS + for service_line in $quoted_services + do + #grep out proper parts of data and use echo to remove quotes + next_name=$(echo $service_line | grep -o "^[\t ]*\"[^\"]*\"" | xargs -r -n1 echo) + next_url=$(echo $service_line | grep -o "\"[^\"]*\"[\t ]*$" | xargs -r -n1 echo) + + if [ "$next_name" = "$service_name" ] + then + update_url=$next_url + fi + done + IFS=$OLD_IFS +fi + + + +verbose_echo "update_url=$update_url" + + + +#if this service isn't enabled then quit +if [ "$enabled" != "1" ] +then + return 0 +fi + + + + + +#compute update interval in seconds +case "$force_unit" in + "days" ) + force_interval_seconds=$(($force_interval*60*60*24)) + ;; + "hours" ) + force_interval_seconds=$(($force_interval*60*60)) + ;; + "minutes" ) + force_interval_seconds=$(($force_interval*60)) + ;; + "seconds" ) + force_interval_seconds=$force_interval + ;; + * ) + #default is hours + force_interval_seconds=$(($force_interval*60*60)) + ;; +esac + + + +#compute check interval in seconds +case "$check_unit" in + "days" ) + check_interval_seconds=$(($check_interval*60*60*24)) + ;; + "hours" ) + check_interval_seconds=$(($check_interval*60*60)) + ;; + "minutes" ) + check_interval_seconds=$(($check_interval*60)) + ;; + "seconds" ) + check_interval_seconds=$check_interval + ;; + * ) + #default is seconds + check_interval_seconds=$check_interval + ;; +esac + + + +verbose_echo "force seconds = $force_interval_seconds" +verbose_echo "check seconds = $check_interval_seconds" + +#kill old process if it exists & set new pid file +if [ -d /var/run/dynamic_dns ] +then + #if process is already running, stop it + if [ -e "/var/run/dynamic_dns/$service_id.pid" ] + then + old_pid=$(cat /var/run/dynamic_dns/$service_id.pid) + test_match=$(ps | grep "^[\t ]*$old_pid") + verbose_echo "old process id (if it exists) = \"$test_match\"" + if [ -n "$test_match" ] + then + kill $old_pid + fi + fi + +else + #make dir since it doesn't exist + mkdir /var/run/dynamic_dns +fi +echo $$ > /var/run/dynamic_dns/$service_id.pid + + + + +#determine when the last update was +current_time=$(date +%s) +last_update=$(( $current_time - (2*$force_interval_seconds) )) +if [ -e "/var/run/dynamic_dns/$service_id.update" ] +then + last_update=$(cat /var/run/dynamic_dns/$service_id.update) +fi +time_since_update=$(($current_time - $last_update)) + + +human_time_since_update=$(( $time_since_update / ( 60 * 60 ) )) +verbose_echo "time_since_update = $human_time_since_update hours" + + + + +registered_ip=$(echo $(nslookup "$domain" 2>/dev/null) | grep -o "Name:.*" | grep -o "$ip_regex") + + +#do update and then loop endlessly, checking ip every check_interval and forcing an updating once every force_interval + +while [ true ] +do + current_ip=$(get_current_ip) + + + current_time=$(date +%s) + time_since_update=$(($current_time - $last_update)) + + + verbose_echo "Running IP check..." + verbose_echo "current system ip = $current_ip" + verbose_echo "registered domain ip = $registered_ip" + + + if [ "$current_ip" != "$registered_ip" ] || [ $force_interval_seconds -lt $time_since_update ] + then + verbose_echo "update necessary, performing update ..." + + #do replacement + final_url=$update_url + for option_var in $ALL_OPTION_VARIABLES + do + replace_name=$(echo "\[$option_var\]" | tr 'a-z' 'A-Z') + replace_value=$(eval echo "\$$option_var") + final_url=$(echo $final_url | sed s/"$replace_name"/"$replace_value"/g ) + done + final_url=$(echo $final_url | sed s/"\[IP\]"/"$current_ip"/g ) + + + verbose_echo "updating with url=\"$final_url\"" + + #here we actually connect, and perform the update + update_output=$( $retrieve_prog "$final_url" ) + + verbose_echo "Update Output:" + verbose_echo "$update_output" + verbose_echo "" + + #save the time of the update + current_time=$(date +%s) + last_update=$current_time + time_since_update='0' + registered_ip=$current_ip + + human_time=$(date) + verbose_echo "update complete, time is: $human_time" + + echo "$last_update" > "/var/run/dynamic_dns/$service_id.update" + else + human_time=$(date) + human_time_since_update=$(( $time_since_update / ( 60 * 60 ) )) + verbose_echo "update unnecessary" + verbose_echo "time since last update = $human_time_since_update hours" + verbose_echo "the time is now $human_time" + fi + + #sleep for 10 minutes, then re-check ip && time since last update + sleep $check_interval_seconds +done + +#should never get here since we're a daemon, but I'll throw it in anyway +return 0 + + + + diff --git a/net/ddns-scripts/files/usr/lib/ddns/services b/net/ddns-scripts/files/usr/lib/ddns/services new file mode 100644 index 000000000..3c14c3cad --- /dev/null +++ b/net/ddns-scripts/files/usr/lib/ddns/services @@ -0,0 +1,29 @@ +# This file contains the update urls for various dynamic dns services. +# Column one contains the service name, column two contains the update url. +# within the update url there are 4 variables you can use: [USERNAME], +# [PASSWORD], [DOMAIN] and [IP]. These are substituted for the username, +# password, and domain name specified in the /etc/config/ddns file when an +# update is performed. The IP is substituted for the current ip address of the +# router. These variables are case sensitive, while urls generally are not, so +# if you need to enter the same text in the url (which seems very unlikely) put +# that text in lowercase, while the variables should remain in uppercase + +"dyndns.org" "http://[USERNAME]:[PASSWORD]@members.dyndns.org/nic/update?hostname=[DOMAIN]&myip=[IP]" +"changeip.com" "http://[USERNAME]:[PASSWORD]@nic.changeip.com/nic/update?u=[USERNAME]&p=[PASSWORD]&cmd=update&hostname=[DOMAIN]&ip=[IP]" +"zoneedit.com" "http://[USERNAME]:[PASSWORD]@http://dynamic.zoneedit.com/auth/dynamic.html?host=[DOMAIN]&dnsto=[IP]" + +#noip is an alias of no-ip, so allow both names for the same service +"no-ip.com" "http://dynupdate.no-ip.com/ducupdate.php?username=[USERNAME]&pass=[PASSWORD]&h[]=[DOMAIN]&ip=[IP]" +"noip.com" "http://dynupdate.no-ip.com/ducupdate.php?username=[USERNAME]&pass=[PASSWORD]&h[]=[DOMAIN]&ip=[IP]" + +#freedns.afraid.org is weird, you just need an update code, for which we use the password variable +"freedns.afraid.org" "http://freedns.afraid.org/dynamic/update.php?[PASSWORD]" + + +#### ADD YOURS HERE! ###################################################################################### +# # +# There are TONS of dynamic dns services out there. There's a huge list of them at: # +# http://www.dmoz.org/Computers/Software/Internet/Servers/Address_Management/Dynamic_DNS_Services/ # +# If anyone has time they could update this file to be compatible with a bunch of them # +# # +########################################################################################################### diff --git a/net/ddns-scripts/files/usr/lib/ddns/shell_get.sh b/net/ddns-scripts/files/usr/lib/ddns/shell_get.sh new file mode 100644 index 000000000..876261762 --- /dev/null +++ b/net/ddns-scripts/files/usr/lib/ddns/shell_get.sh @@ -0,0 +1,126 @@ +####################################################################### +#/usr/lib/ddns/shell_get.sh +# +# Written by Eric Bishop, January 2008 +# Distributed under the terms of the GNU General Public License (GPL) version 2.0 +# +# This implements a wget-like program ("shell_get 1.0") that can handle +# basic http username/password authentication. +# It is implemented using the netcat (nc) utility. +# This is necessary because the default busybox wget +# does not include username/password functionality (it really sucks) +########################################################################## + +to_ascii() +{ + dec=$1 + hex="" + if [ $dec -lt 26 ]; then + hex=$(($dec + 0x41)) + elif [ $dec -ge 26 ] && [ $dec -lt 52 ]; then + hex=$(( ($dec-26) + 0x61)) + elif [ $dec -ge 52 ] && [ $dec -lt 62 ]; then + hex=$(( ($dec-52) + 0x30)) + elif [ $dec -eq 62 ]; then + hex=43 + else + hex=47 + fi + printf "%x" $hex +} + +encode_base64() +{ + original_str=$1 + + hex_str=$( echo -n "$original_str" | hexdump -v | awk '{ for ( i = 2; i <= NF; i++ ) { h1=substr($i, 3, 2); h2=substr($i,0,2); printf("%s%s", h1, h2); }}' | awk ' { $0~gsub(/00$/, "") };{ i=1; while(i <= length($0) ){ block= substr($0, i, 3); printf("%s ", block); i=i+3; }}' | awk ' {$0~gsub(/ $/, "")}; { print $0 }' ) + + length=$(echo $hex_str | awk '{$0~gsub(/ /, "")}; { print length($0) }') + remainder=$(($length % 3 )) + if [ $remainder -eq 1 ]; then + hex_str=$hex_str'00' + elif [ $remainder -eq 2 ]; then + hex_str=$hex_str'0' + fi + + + + + base_64_str="" + for hex_block in $hex_str + do + char1=$(to_ascii $((0x$hex_block / 64))) + char2=$(to_ascii $((0x$hex_block % 64))) + base_64_str=$(printf "$base_64_str\x$char1\x$char2") + done + + + if [ $remainder -eq 1 ]; then + base_64_str=$(echo "$base_64_str" | awk '{ $0~gsub(/A$/, "=");} { print $0 }' ) + elif [ $remainder -eq 2 ]; then + base_64_str=$(echo "$base_64_str==") + fi + + + echo $base_64_str +} + +shell_get() +{ + full_url=$1 + + protocol_str=$(echo $full_url | awk ' BEGIN {FS="://"} { if($0~/:\/\//)print $1 }') + if [ "$protocol_str" != "http" ] && [ -n "$protocol_str" ] ; then + echo "protocol = $protocol_str" + echo "Error, unsupported Protocol" + echo "Only http connections are supported at this time" + return 1; + fi + + + if [ -n "$protocol_str" ] ; then + full_url=$(echo $full_url | awk ' {$0~gsub(/http:\/\//, "")}; {print $0}') + fi + + + + user_pass=$(echo $full_url | awk ' BEGIN {FS="@"}; { if( $0~/@/ && $1~/^[^\?\/]+:[^\?\/]+$/ ) print $1 }') + host_and_args="" + if [ -n "$user_pass" ]; then + host_and_args=$(echo $full_url | awk ' $0~gsub(/^[^@]+@/, "") {print $0}') + else + host_and_args="$full_url" + fi + + host_name=$(echo $host_and_args | awk ' BEGIN {FS="[:?/]"}; {print $1};') + port_num=$(echo $host_and_args | awk ' BEGIN {FS="[?/]"}; { if($1~/:/){$1~gsub(/.*:/, ""); print $1;}else {print "80"}};') + + path=$(echo $host_and_args | awk ' { $0~gsub(/^[^\?\/]+/, "")}; {print $0};') + path_start_test=$(echo "$path" | grep "^/") + if [ -z "$path_start_test" ]; then + path="/$path" + fi + + + #echo "full_url=\"$full_url\"" + #echo "user_pass=\"$user_pass\"" + #echo "host_name=\"$host_name\"" + #echo "port_num=\"$port_num\"" + #echo "path=\"$path\"" + + + retrieved_data="" + if [ -n "$user_pass" ]; then + auth_str=$(encode_base64 "$user_pass" ) + #echo -e "GET $path HTTP/1.0\nHost: $host_name\nAuthorization: Basic $auth_str\nUser-Agent: shell_get 1.0\n\n" + retrieved_data=$(echo -e "GET $path HTTP/1.0\nHost: $host_name\nAuthorization: Basic $auth_str\nUser-Agent: shell_get 1.0\n\n" | nc "$host_name" $port_num | cat) + + else + #echo -e "GET $path HTTP/1.0\nHost: $host_name\nUser-Agent: shell_get 1.0\n\n" + retrieved_data=$(echo -e "GET $path HTTP/1.0\nHost: $host_name\nUser-Agent: shell_get 1.0\n\n" | nc "$host_name" $port_num | cat) + fi + + echo -e "$retrieved_data" + +} +