From bbdc84261cf63055bb6b575b0a0a2da11036ab67 Mon Sep 17 00:00:00 2001
From: Andrew Stowell <andrew@digitaladapt.com>
Date: Wed, 20 Sep 2023 20:58:19 -0400
Subject: [PATCH] Updated Dynv6 PowerShell script to more closely match bash
 shell script.

---
 UpdateDynv6.ps1 => Dynv6.ps1 | 53 +++++++++++++++++++++++++-----------
 dynv6.sh                     |  8 +++---
 2 files changed, 41 insertions(+), 20 deletions(-)
 rename UpdateDynv6.ps1 => Dynv6.ps1 (66%)

diff --git a/UpdateDynv6.ps1 b/Dynv6.ps1
similarity index 66%
rename from UpdateDynv6.ps1
rename to Dynv6.ps1
index 9fcb26d..2c48721 100644
--- a/UpdateDynv6.ps1
+++ b/Dynv6.ps1
@@ -55,39 +55,60 @@
 
 
 param(
-    [string]$zone = $(throw "-zone is required"),
-    [string]$token = $(throw "-token is required"),
-    [string]$logfile = "$env:USERPROFILE\\DDNS_UPDATE_LOG",
-    [switch]$isIPV6 = $false
-    )
+    [string] $zone = $(throw "-zone is required"),
+    [string] $token = $(throw "-token is required"),
+    [string] $netmask = "128",
+    [string] $logfile = "$env:USERPROFILE\\.dynv6.log"
+)
 
-$lookup4 =[System.Uri]'https://ipinfo.io/ip'
-$lookup6 =[System.Uri]'https://v6.ipinfo.io/ip'
-# google can return either IPv4 or IPv6 'https://domains.google.com/checkip'
+$file4 = "$env:USERPROFILE\\.dynv6.addr4"
+$file6 = "$env:USERPROFILE\\.dynv6.addr6"
 
-$update4 =[System.Uri]'https://dynv6.com/api/update'
-$update6 =[System.Uri]'https://dynv6.com/api/update'
+if (Test-Path -Path $file4) {
+    $old4 = Get-Content -Path $file4
+} else {
+    $old4 = $null
+}
+if (Test-Path -Path $file6) {
+    $old6 = Get-Content -Path $file6
+} else {
+    $old6 = $null
+}
+
+$lookup4 = [System.Uri]'https://ipinfo.io/ip'
+$lookup6 = [System.Uri]'https://v6.ipinfo.io/ip'
+
+$update4 = [System.Uri]'https://dynv6.com/api/update'
+$update6 = [System.Uri]'https://dynv6.com/api/update'
 
 Get-Date | Tee-Object -FilePath $logfile -Append | Out-Host
 
-if($isIPV6 -eq $false){
-    $current4 = Invoke-RestMethod -Method Get -Uri $lookup4
+$current4 = Invoke-RestMethod -Method Get -Uri $lookup4
+$current6 = Invoke-RestMethod -Method Get -Uri $lookup6
 
+if ($old4 -eq $current4) {
+    Tee-Object -FilePath $logfile -Append -InputObject "IPv4 address unchanged" | Out-Host
+} else {
+    Tee-Object -FilePath $logfile -Append -InputObject "Updating IPv4" | Out-Host
     $body = @{
        zone = $zone
        token = $token
        ipv4 = $current4
     }
-    Invoke-RestMethod -Method Get -Uri $update4 -Body $body | Tee-Object -FilePath $lotfile -Append | Out-Host
+    Invoke-RestMethod -Method Get -Uri $update4 -Body $body | Tee-Object -FilePath $logfile -Append | Out-Host
+    Out-File -FilePath $file4 -InputObject $current4
 }
-else{
-    $current6 = Invoke-RestMethod -Method Get -Uri $lookup6
 
+if ($old6 -eq $current6) {
+    Tee-Object -FilePath $logfile -Append -InputObject "IPv6 address unchanged" | Out-Host
+} else {
+    Tee-Object -FilePath $logfile -Append -InputObject "Updating IPv6" | Out-Host
     $body = @{
        zone = $zone
        token = $token
-       ipv6 = "$current6/128"
+       ipv6 = "$current6/$netmask"
     }
     Invoke-RestMethod -Method Get -Uri $update6 -Body $body | Tee-Object -FilePath $logfile -Append | Out-Host
+    Out-File -FilePath $file6 -InputObject $current6
 }
 
diff --git a/dynv6.sh b/dynv6.sh
index daf6898..2f5d3bd 100755
--- a/dynv6.sh
+++ b/dynv6.sh
@@ -1,6 +1,6 @@
 #!/bin/sh
 
-hostname=$1
+zone=$1
 device=$2
 scope=$3
 
@@ -11,7 +11,7 @@ file6="$HOME/.dynv6.addr6"
 [ -e $file6 ] && old6=`cat $file6`
 
 # ensure we have required information
-if [ -z "$hostname" -o -z "$token" ]; then
+if [ -z "$zone" -o -z "$token" ]; then
     echo "Usage: token=<your-authentication-token> [netmask=64] $0 your-name.dynv6.net [device] [scope]"
     exit 1
 fi
@@ -71,7 +71,7 @@ if [ "$old4" = "$ipv4" ]; then
     echo "IPv4 address unchanged"
 else
     echo -n "Updating IPv4: "
-    $bin "https://dynv6.com/api/update?hostname=$hostname&ipv4=$ipv4&token=$token"
+    $bin "https://dynv6.com/api/update?zone=$zone&ipv4=$ipv4&token=$token"
     echo ""
 
     # save current address
@@ -84,7 +84,7 @@ if [ "$old6" = "$ipv6" ]; then
 else
     # send addresses to dynv6
     echo -n "Updating IPv6: "
-    $bin "https://dynv6.com/api/update?hostname=$hostname&ipv6=$ipv6&token=$token"
+    $bin "https://dynv6.com/api/update?zone=$zone&ipv6=$ipv6&token=$token"
     echo ""
 
     # save current address