Ruakij
/
wg-ipv6-converter
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go-format

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dev
Ruakij 2 years ago
parent 0d6564448a
commit 9b0ed5a51b
1 changed files with 132 additions and 133 deletions
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263
cmd/app/main.go
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@ -7,7 +7,7 @@ import (
"time"
envChecks "git.ruekov.eu/ruakij/routingtabletowg/lib/environmentchecks"
"git.ruekov.eu/ruakij/routingtabletowg/lib/wgchecks/netchecks"
"git.ruekov.eu/ruakij/routingtabletowg/lib/wgchecks/netchecks"
"github.com/vishvananda/netlink"
"golang.zx2c4.com/wireguard/wgctrl"
@ -18,153 +18,152 @@ var envRequired = []string{
"INTERFACE",
}
var envDefaults = map[string]string{
"IPV6_FORMAT": "fc12::%02x%02x:%02x%02x/%d",
"FILTER_PREFIX": "100.100",
"RECHECK_INTERVAL": "5m",
"IPV6_FORMAT": "fc12::%02x%02x:%02x%02x/%d",
"FILTER_PREFIX": "100.100",
"RECHECK_INTERVAL": "5m",
}
func main() {
// Environment-vars
err := envChecks.HandleRequired(envRequired)
if(err != nil){
if err != nil {
logger.Error.Fatal(err)
}
envChecks.HandleDefaults(envDefaults)
// Get the network interface object
// Get the network interface object
iface := os.Getenv("INTERFACE")
netInterface, err := netlink.LinkByName(iface)
if err != nil {
logger.Error.Fatal(err)
}
ipv6Format := os.Getenv("IPV6_FORMAT")
ipv6TestStr := *convertIPv4ToIPv6(&ipv6Format, &net.IPNet{IP: net.IPv4(1,1,1,1), Mask: net.CIDRMask(24, net.IPv4len)})
_, err = netlink.ParseIPNet(ipv6TestStr)
if err != nil {
logger.Error.Fatalf("IPV6_FORMAT is invalid: %s", err)
}
filterPrefix := os.Getenv("FILTER_PREFIX")
checkIntervalStr := os.Getenv("RECHECK_INTERVAL")
checkInterval, err := time.ParseDuration(checkIntervalStr)
netInterface, err := netlink.LinkByName(iface)
if err != nil {
logger.Error.Fatal(err)
}
ipv6Format := os.Getenv("IPV6_FORMAT")
ipv6TestStr := *convertIPv4ToIPv6(&ipv6Format, &net.IPNet{IP: net.IPv4(1, 1, 1, 1), Mask: net.CIDRMask(24, net.IPv4len)})
_, err = netlink.ParseIPNet(ipv6TestStr)
if err != nil {
logger.Error.Fatalf("IPV6_FORMAT is invalid: %s", err)
}
filterPrefix := os.Getenv("FILTER_PREFIX")
checkIntervalStr := os.Getenv("RECHECK_INTERVAL")
checkInterval, err := time.ParseDuration(checkIntervalStr)
if err != nil {
logger.Error.Fatalf("Couldn't parse RECHECK_INTERVAL '%s': %s", checkIntervalStr, err)
}
// Create a WireGuard client
client, err := wgctrl.New()
if err != nil {
logger.Error.Fatal(err)
}
defer client.Close()
// Loop indefinitely
for {
// Get the IPv4 addresses of the interface
addrs, err := netlink.AddrList(netInterface, netlink.FAMILY_V4)
if err != nil {
logger.Error.Fatal(err)
}
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, 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.Error.Fatalf("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)
}
// Get the WireGuard peers on the interface
wgDevice, err := client.Device(iface)
if err != nil {
logger.Error.Fatalf("getting WireGuard device from interface '%s' failed: %s", iface, err)
}
// Create a WireGuard client
client, err := wgctrl.New()
if err != nil {
logger.Error.Fatal(err)
}
defer client.Close()
// Loop indefinitely
for {
// Get the IPv4 addresses of the interface
addrs, err := netlink.AddrList(netInterface, netlink.FAMILY_V4)
if err != nil {
logger.Error.Fatal(err)
}
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, 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.Error.Fatalf("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)
}
// Get the WireGuard peers on the interface
wgDevice, err := client.Device(iface)
if err != nil {
logger.Error.Fatalf("getting WireGuard device from interface '%s' failed: %s", iface, err)
}
var wgConfig wgtypes.Config
wgConfig.Peers = make([]wgtypes.PeerConfig, 0, len(wgDevice.Peers))
for _, peer := range wgDevice.Peers {
// Create slice for 1 expected addition
var addAllowedIPs = make([]net.IPNet, 0, 1)
// Loop through the allowed-ips and add the ones starting with 100.100
for _, allowedIP := range peer.AllowedIPs {
if allowedIP.String()[:len(filterPrefix)] == filterPrefix {
// Convert the IPv4 allowed-ip to an IPv6 address
ipv6Str := *convertIPv4ToIPv6(&ipv6Format, &allowedIP)
logger.Info.Printf("AllowedIP %s -> %s to peer %s", allowedIP.String(), ipv6Str, peer.PublicKey)
ipv6, err := netlink.ParseIPNet(ipv6Str)
if err != nil {
logger.Warn.Printf("Couldnt parse IPv6 address %s of peer %s: %s", ipv6Str, peer.PublicKey, err)
continue
}
// Check if already set
if i, _ := netchecks.IPNetIndexByIPNet(&peer.AllowedIPs, ipv6); i != -1 {
continue
}
// Add the IPv6 allowed-ip to the peer
addAllowedIPs = append(addAllowedIPs, *ipv6)
}
}
if(len(addAllowedIPs) > 0){
// Create peer-config
peerConfig := wgtypes.PeerConfig{
PublicKey: peer.PublicKey,
AllowedIPs: append(peer.AllowedIPs, addAllowedIPs...),
}
// Add entry
wgConfig.Peers = append(wgConfig.Peers, peerConfig)
}
}
if(len(wgConfig.Peers) == 0){
logger.Info.Println("No changes, skipping")
} else {
err = client.ConfigureDevice(iface, wgConfig)
if(err != nil){
logger.Error.Fatalf("Error configuring wg-device '%s': %s", iface, err)
}
}
// Sleep for x seconds before running the loop again
time.Sleep(checkInterval)
}
wgConfig.Peers = make([]wgtypes.PeerConfig, 0, len(wgDevice.Peers))
for _, peer := range wgDevice.Peers {
// Create slice for 1 expected addition
var addAllowedIPs = make([]net.IPNet, 0, 1)
// Loop through the allowed-ips and add the ones starting with 100.100
for _, allowedIP := range peer.AllowedIPs {
if allowedIP.String()[:len(filterPrefix)] == filterPrefix {
// Convert the IPv4 allowed-ip to an IPv6 address
ipv6Str := *convertIPv4ToIPv6(&ipv6Format, &allowedIP)
logger.Info.Printf("AllowedIP %s -> %s to peer %s", allowedIP.String(), ipv6Str, peer.PublicKey)
ipv6, err := netlink.ParseIPNet(ipv6Str)
if err != nil {
logger.Warn.Printf("Couldnt parse IPv6 address %s of peer %s: %s", ipv6Str, peer.PublicKey, err)
continue
}
// Check if already set
if i, _ := netchecks.IPNetIndexByIPNet(&peer.AllowedIPs, ipv6); i != -1 {
continue
}
// Add the IPv6 allowed-ip to the peer
addAllowedIPs = append(addAllowedIPs, *ipv6)
}
}
if len(addAllowedIPs) > 0 {
// Create peer-config
peerConfig := wgtypes.PeerConfig{
PublicKey: peer.PublicKey,
AllowedIPs: append(peer.AllowedIPs, addAllowedIPs...),
}
// Add entry
wgConfig.Peers = append(wgConfig.Peers, peerConfig)
}
}
if len(wgConfig.Peers) == 0 {
logger.Info.Println("No changes, skipping")
} else {
err = client.ConfigureDevice(iface, wgConfig)
if err != nil {
logger.Error.Fatalf("Error configuring wg-device '%s': %s", iface, err)
}
}
// Sleep for x seconds before running the loop again
time.Sleep(checkInterval)
}
}
func convertIPv4ToIPv6(ipv6Format *string, ipv4 *net.IPNet) (*string) {
CIDR, _ := ipv4.Mask.Size()
// Run format
ipv6Str := fmt.Sprintf(*ipv6Format, (*ipv4).IP[0], (*ipv4).IP[1], (*ipv4).IP[2], (*ipv4).IP[3], net.IPv6len*8-(net.IPv4len*8-CIDR))
return &ipv6Str
func convertIPv4ToIPv6(ipv6Format *string, ipv4 *net.IPNet) *string {
CIDR, _ := ipv4.Mask.Size()
// Run format
ipv6Str := fmt.Sprintf(*ipv6Format, (*ipv4).IP[0], (*ipv4).IP[1], (*ipv4).IP[2], (*ipv4).IP[3], net.IPv6len*8-(net.IPv4len*8-CIDR))
return &ipv6Str
}

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