Merge branch 'dev'

Author: Ruakij

README.md

@@ -51,7 +51,8 @@ Variable|Description|Default
 -|-|-
 `INTERFACE`*        | Wireguard-Interface Name                  |
 `IPV6_FORMAT`       | Format to use for converting v4 to v6 <br> The CIDR-Mask gets translated using 128 - 24 - Mask <br> e.g. `10.0.100.5/16` -> `fc12::0a00:6405/96`   | `fc12::%02x%02x:%02x%02x/%d`
-`RECHECK_INTERVAL`  | Interval in seconds to recheck AllowedIPs entries in case something changed  | 300
+`FILTER_PREFIX`     | Prefix to filter for IP-Networks          | `100.100`
+`RECHECK_INTERVAL`  | Interval in go-time-format to recheck AllowedIPs entries in case something changed  | 5m
 
 *\* Required*
 

build/Dockerfile

@@ -0,0 +1,13 @@
+# ---- Build ----
+FROM golang:1.19-alpine AS build
+WORKDIR /build
+# Copy sources
+ADD . .
+# Get dependencies
+RUN go get ./cmd/app
+# Compile
+RUN CGO_ENABLED=0 go build -a -o app ./cmd/app
+
+# ---- Output ----
+FROM scratch AS export-stage
+COPY --from=build /build/app .

build/build-multiarch.sh

@@ -0,0 +1,9 @@
+PLATFORM="linux/amd64,linux/arm64/v8,linux/arm/v7"
+EXTRA_ARGS="$@"
+
+docker buildx build \
+    --platform $PLATFORM \
+    -f $(dirname $0)/Dockerfile \
+    --output out \
+    $EXTRA_ARGS \
+    .

build/build-ownarch.sh

@@ -0,0 +1,7 @@
+EXTRA_ARGS="$@"
+
+docker build \
+    -f $(dirname $0)/Dockerfile \
+    --output out \
+    $EXTRA_ARGS \
+    .

cmd/app/main.go

@@ -4,7 +4,6 @@ import (
 	"fmt"
 	"net"
 	"os"
-	"strconv"
 	"time"
 
 	envChecks "git.ruekov.eu/ruakij/routingtabletowg/lib/environmentchecks"
@@ -21,7 +20,7 @@ var envRequired = []string{
 var envDefaults = map[string]string{
     "IPV6_FORMAT": "fc12::%02x%02x:%02x%02x/%d",
     "FILTER_PREFIX": "100.100",
-    "RECHECK_INTERVAL": "300",
+    "RECHECK_INTERVAL": "5m",
 }
 
 func main() {
@@ -49,36 +48,47 @@ func main() {
     filterPrefix := os.Getenv("FILTER_PREFIX")
 
     checkIntervalStr := os.Getenv("RECHECK_INTERVAL")
-    checkIntervalSec, err := strconv.Atoi(checkIntervalStr)
+    checkInterval, err := time.ParseDuration(checkIntervalStr)
 	if err != nil {
-		logger.Error.Fatalf("Couldn't read RECHECK_INTERVAL '%s': %s", checkIntervalStr, err)
+		logger.Error.Fatalf("Couldn't parse RECHECK_INTERVAL '%s': %s", checkIntervalStr, err)
 	}
-    checkInterval := time.Second * time.Duration(checkIntervalSec)
 
     // Get the IPv4 address of the interface
     addrs, err := netlink.AddrList(netInterface, netlink.FAMILY_V4)
     if err != nil {
         logger.Error.Fatal(err)
     }
-    if(len(addrs) == 0){
-        logger.Error.Fatal("Interface doesnt have IPv4-Adresses")
-    }
+    processedCount := 0
+    filteredCount := 0
+    for _, addr := range addrs {
+        // Check filter
+        if addr.String()[:len(filterPrefix)] != filterPrefix {
+            filteredCount++
+            continue
+        }
 
-    // Add the IPv6 address to the interface
-    ipv6Str := *convertIPv4ToIPv6(&ipv6Format, addrs[0].IPNet)
-    ipv6, err := netlink.ParseAddr(ipv6Str)
-    if err != nil {
-        logger.Error.Fatal(err)
-    }
-    logger.Info.Printf("Adding converted %s -> %s to interface", addrs[0].IPNet.String(), ipv6Str)
-    err = netlink.AddrAdd(netInterface, ipv6)
-    if err != nil {
-        switch {
-        case os.IsExist(err):
-            logger.Warn.Println("Address is already set on interface")
-        default:
-            logger.Error.Fatalf("Failed to set address on interface: %v", err)
+        // Add the IPv6 address to the interface
+        ipv6Str := *convertIPv4ToIPv6(&ipv6Format, addr.IPNet)
+        ipv6, err := netlink.ParseAddr(ipv6Str)
+        if err != nil {
+            logger.Warn.Printf("failed parsing converted %s -> %s : %s", addr.IPNet.String(), ipv6Str, err)
+            continue
+        }
+
+        logger.Info.Printf("Adding converted %s -> %s to interface", addr.IPNet.String(), ipv6Str)
+        err = netlink.AddrAdd(netInterface, ipv6)
+        if err != nil {
+            switch {
+            case os.IsExist(err):
+                logger.Warn.Println("Address is already set on interface")
+            default:
+                logger.Warn.Printf("Failed to set address on interface: %v", err)
+            }
         }
+        processedCount++
+    }
+    if(processedCount != len(addrs)) {
+        logger.Warn.Printf("Not all Interface-Addresses were processed. Summary: %d processed, %d filtered, %d failed", processedCount, filteredCount, len(addrs)-processedCount-filteredCount)
     }
 
     // Create a WireGuard client