mirror of
https://github.com/fosrl/olm.git
synced 2026-03-02 08:46:44 +00:00
Windows "working"
This commit is contained in:
Owen
368
common.go
Normal file
368
common.go
Normal file
@@ -0,0 +1,368 @@
|
||||
package main
|
||||
|
||||
import (
|
||||
"encoding/base64"
|
||||
"encoding/hex"
|
||||
"encoding/json"
|
||||
"fmt"
|
||||
"net"
|
||||
"strconv"
|
||||
"strings"
|
||||
"time"
|
||||
|
||||
"github.com/fosrl/newt/logger"
|
||||
"github.com/fosrl/olm/websocket"
|
||||
"golang.org/x/exp/rand"
|
||||
"golang.zx2c4.com/wireguard/conn"
|
||||
"golang.zx2c4.com/wireguard/device"
|
||||
)
|
||||
|
||||
type WgData struct {
|
||||
Endpoint string `json:"endpoint"`
|
||||
PublicKey string `json:"publicKey"`
|
||||
ServerIP string `json:"serverIP"`
|
||||
TunnelIP string `json:"tunnelIP"`
|
||||
Targets TargetsByType `json:"targets"`
|
||||
}
|
||||
|
||||
type TargetsByType struct {
|
||||
UDP []string `json:"udp"`
|
||||
TCP []string `json:"tcp"`
|
||||
}
|
||||
|
||||
type TargetData struct {
|
||||
Targets []string `json:"targets"`
|
||||
}
|
||||
|
||||
var (
|
||||
stopHolepunch chan struct{}
|
||||
stopRegister chan struct{}
|
||||
)
|
||||
|
||||
const (
|
||||
ENV_WG_TUN_FD = "WG_TUN_FD"
|
||||
ENV_WG_UAPI_FD = "WG_UAPI_FD"
|
||||
ENV_WG_PROCESS_FOREGROUND = "WG_PROCESS_FOREGROUND"
|
||||
)
|
||||
|
||||
type fixedPortBind struct {
|
||||
port uint16
|
||||
conn.Bind
|
||||
}
|
||||
|
||||
func (b *fixedPortBind) Open(port uint16) ([]conn.ReceiveFunc, uint16, error) {
|
||||
// Ignore the requested port and use our fixed port
|
||||
return b.Bind.Open(b.port)
|
||||
}
|
||||
|
||||
func NewFixedPortBind(port uint16) conn.Bind {
|
||||
return &fixedPortBind{
|
||||
port: port,
|
||||
Bind: conn.NewDefaultBind(),
|
||||
}
|
||||
}
|
||||
|
||||
func fixKey(key string) string {
|
||||
// Remove any whitespace
|
||||
key = strings.TrimSpace(key)
|
||||
|
||||
// Decode from base64
|
||||
decoded, err := base64.StdEncoding.DecodeString(key)
|
||||
if err != nil {
|
||||
logger.Fatal("Error decoding base64")
|
||||
}
|
||||
|
||||
// Convert to hex
|
||||
return hex.EncodeToString(decoded)
|
||||
}
|
||||
|
||||
func parseLogLevel(level string) logger.LogLevel {
|
||||
switch strings.ToUpper(level) {
|
||||
case "DEBUG":
|
||||
return logger.DEBUG
|
||||
case "INFO":
|
||||
return logger.INFO
|
||||
case "WARN":
|
||||
return logger.WARN
|
||||
case "ERROR":
|
||||
return logger.ERROR
|
||||
case "FATAL":
|
||||
return logger.FATAL
|
||||
default:
|
||||
return logger.INFO // default to INFO if invalid level provided
|
||||
}
|
||||
}
|
||||
|
||||
func mapToWireGuardLogLevel(level logger.LogLevel) int {
|
||||
switch level {
|
||||
case logger.DEBUG:
|
||||
return device.LogLevelVerbose
|
||||
// case logger.INFO:
|
||||
// return device.LogLevel
|
||||
case logger.WARN:
|
||||
return device.LogLevelError
|
||||
case logger.ERROR, logger.FATAL:
|
||||
return device.LogLevelSilent
|
||||
default:
|
||||
return device.LogLevelSilent
|
||||
}
|
||||
}
|
||||
|
||||
func resolveDomain(domain string) (string, error) {
|
||||
// First handle any protocol prefix
|
||||
domain = strings.TrimPrefix(strings.TrimPrefix(domain, "https://"), "http://")
|
||||
|
||||
// if there are any trailing slashes, remove them
|
||||
domain = strings.TrimSuffix(domain, "/")
|
||||
|
||||
// Now split host and port
|
||||
host, port, err := net.SplitHostPort(domain)
|
||||
if err != nil {
|
||||
// No port found, use the domain as is
|
||||
host = domain
|
||||
port = ""
|
||||
}
|
||||
|
||||
// Lookup IP addresses
|
||||
ips, err := net.LookupIP(host)
|
||||
if err != nil {
|
||||
return "", fmt.Errorf("DNS lookup failed: %v", err)
|
||||
}
|
||||
|
||||
if len(ips) == 0 {
|
||||
return "", fmt.Errorf("no IP addresses found for domain %s", host)
|
||||
}
|
||||
|
||||
// Get the first IPv4 address if available
|
||||
var ipAddr string
|
||||
for _, ip := range ips {
|
||||
if ipv4 := ip.To4(); ipv4 != nil {
|
||||
ipAddr = ipv4.String()
|
||||
break
|
||||
}
|
||||
}
|
||||
|
||||
// If no IPv4 found, use the first IP (might be IPv6)
|
||||
if ipAddr == "" {
|
||||
ipAddr = ips[0].String()
|
||||
}
|
||||
|
||||
// Add port back if it existed
|
||||
if port != "" {
|
||||
ipAddr = net.JoinHostPort(ipAddr, port)
|
||||
}
|
||||
|
||||
return ipAddr, nil
|
||||
}
|
||||
|
||||
// TODO: we need to send the token with this probably to verify auth
|
||||
func sendUDPHolePunch(serverAddr string, olmID string, sourcePort uint16) error {
|
||||
// Bind to specific local port
|
||||
localAddr := &net.UDPAddr{
|
||||
Port: int(sourcePort),
|
||||
IP: net.IPv4zero,
|
||||
}
|
||||
|
||||
remoteAddr, err := net.ResolveUDPAddr("udp", serverAddr)
|
||||
if err != nil {
|
||||
return fmt.Errorf("failed to resolve UDP address: %v", err)
|
||||
}
|
||||
|
||||
conn, err := net.ListenUDP("udp", localAddr)
|
||||
if err != nil {
|
||||
return fmt.Errorf("failed to bind UDP socket: %v", err)
|
||||
}
|
||||
defer conn.Close()
|
||||
|
||||
payload := struct {
|
||||
OlmID string `json:"olmId"`
|
||||
}{
|
||||
OlmID: olmID,
|
||||
}
|
||||
|
||||
data, err := json.Marshal(payload)
|
||||
if err != nil {
|
||||
return fmt.Errorf("failed to marshal payload: %v", err)
|
||||
}
|
||||
|
||||
_, err = conn.WriteToUDP(data, remoteAddr)
|
||||
if err != nil {
|
||||
return fmt.Errorf("failed to send UDP packet: %v", err)
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func keepSendingUDPHolePunch(endpoint string, olmID string, sourcePort uint16) {
|
||||
host, err := resolveDomain(endpoint)
|
||||
if err != nil {
|
||||
logger.Error("Failed to resolve endpoint: %v", err)
|
||||
return
|
||||
}
|
||||
|
||||
// Execute once immediately before starting the loop
|
||||
if err := sendUDPHolePunch(host+":21820", olmID, sourcePort); err != nil {
|
||||
logger.Error("Failed to send UDP hole punch: %v", err)
|
||||
}
|
||||
|
||||
ticker := time.NewTicker(250 * time.Millisecond)
|
||||
defer ticker.Stop()
|
||||
|
||||
for {
|
||||
select {
|
||||
case <-stopHolepunch:
|
||||
logger.Info("Stopping UDP holepunch")
|
||||
return
|
||||
case <-ticker.C:
|
||||
if err := sendUDPHolePunch(host+":21820", olmID, sourcePort); err != nil {
|
||||
logger.Error("Failed to send UDP hole punch: %v", err)
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func sendRegistration(olm *websocket.Client, publicKey string) error {
|
||||
err := olm.SendMessage("olm/wg/register", map[string]interface{}{
|
||||
"publicKey": publicKey,
|
||||
})
|
||||
if err != nil {
|
||||
logger.Error("Failed to send registration message: %v", err)
|
||||
return err
|
||||
}
|
||||
logger.Info("Sent registration message")
|
||||
return nil
|
||||
}
|
||||
|
||||
func keepSendingRegistration(olm *websocket.Client, publicKey string) {
|
||||
ticker := time.NewTicker(1 * time.Second)
|
||||
defer ticker.Stop()
|
||||
|
||||
for {
|
||||
select {
|
||||
case <-stopRegister:
|
||||
logger.Info("Stopping registration messages")
|
||||
return
|
||||
case <-ticker.C:
|
||||
if err := sendRegistration(olm, publicKey); err != nil {
|
||||
logger.Error("Failed to send periodic registration: %v", err)
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func monitorConnection(dev *device.Device, onTimeout func()) {
|
||||
const (
|
||||
checkInterval = 100 * time.Millisecond // Check every 0.1 seconds
|
||||
timeout = 500 * time.Millisecond // Total timeout of 1.5 seconds
|
||||
)
|
||||
|
||||
go func() {
|
||||
ticker := time.NewTicker(checkInterval)
|
||||
defer ticker.Stop()
|
||||
|
||||
timeoutTimer := time.NewTimer(timeout)
|
||||
defer timeoutTimer.Stop()
|
||||
|
||||
// var lastSent uint64
|
||||
|
||||
for {
|
||||
select {
|
||||
case <-ticker.C:
|
||||
// Get the current device statistics
|
||||
deviceInfo, err := dev.IpcGet()
|
||||
if err != nil {
|
||||
logger.Error("Failed to get device statistics: %v", err)
|
||||
continue
|
||||
}
|
||||
|
||||
// Parse the statistics from the IPC output
|
||||
stats := parseStatistics(deviceInfo)
|
||||
|
||||
logger.Info("Received: %d, Sent: %d", stats.received, stats.sent)
|
||||
|
||||
// Check if we've received any new bytes
|
||||
if stats.received > 0 {
|
||||
// Connection is successful, we received data
|
||||
logger.Info("Connection established - received bytes detected")
|
||||
return
|
||||
}
|
||||
|
||||
// Update the last known values
|
||||
// lastSent = stats.sent
|
||||
|
||||
case <-timeoutTimer.C:
|
||||
// We've hit our timeout without seeing any received bytes
|
||||
logger.Warn("Connection timeout - no data received within %v", timeout)
|
||||
onTimeout()
|
||||
return
|
||||
}
|
||||
}
|
||||
}()
|
||||
}
|
||||
|
||||
// statistics holds the parsed byte counts from the device
|
||||
type statistics struct {
|
||||
received uint64
|
||||
sent uint64
|
||||
}
|
||||
|
||||
// parseStatistics extracts the received and sent byte counts from the device info string
|
||||
func parseStatistics(info string) statistics {
|
||||
var stats statistics
|
||||
|
||||
// Split the device info into lines
|
||||
lines := strings.Split(info, "\n")
|
||||
|
||||
// Look for the transfer_receive and transfer_send lines
|
||||
for _, line := range lines {
|
||||
if strings.HasPrefix(line, "rx_bytes=") {
|
||||
valueStr := strings.TrimPrefix(line, "rx_bytes=")
|
||||
if value, err := strconv.ParseUint(valueStr, 10, 64); err == nil {
|
||||
stats.received = value
|
||||
}
|
||||
} else if strings.HasPrefix(line, "tx_bytes=") {
|
||||
valueStr := strings.TrimPrefix(line, "tx_bytes=")
|
||||
if value, err := strconv.ParseUint(valueStr, 10, 64); err == nil {
|
||||
stats.sent = value
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return stats
|
||||
}
|
||||
|
||||
func FindAvailableUDPPort(minPort, maxPort uint16) (uint16, error) {
|
||||
if maxPort < minPort {
|
||||
return 0, fmt.Errorf("invalid port range: min=%d, max=%d", minPort, maxPort)
|
||||
}
|
||||
|
||||
// Create a slice of all ports in the range
|
||||
portRange := make([]uint16, maxPort-minPort+1)
|
||||
for i := range portRange {
|
||||
portRange[i] = minPort + uint16(i)
|
||||
}
|
||||
|
||||
// Fisher-Yates shuffle to randomize the port order
|
||||
rand.Seed(uint64(time.Now().UnixNano()))
|
||||
for i := len(portRange) - 1; i > 0; i-- {
|
||||
j := rand.Intn(i + 1)
|
||||
portRange[i], portRange[j] = portRange[j], portRange[i]
|
||||
}
|
||||
|
||||
// Try each port in the randomized order
|
||||
for _, port := range portRange {
|
||||
addr := &net.UDPAddr{
|
||||
IP: net.ParseIP("127.0.0.1"),
|
||||
Port: int(port),
|
||||
}
|
||||
conn, err := net.ListenUDP("udp", addr)
|
||||
if err != nil {
|
||||
continue // Port is in use or there was an error, try next port
|
||||
}
|
||||
_ = conn.SetDeadline(time.Now())
|
||||
conn.Close()
|
||||
return port, nil
|
||||
}
|
||||
|
||||
return 0, fmt.Errorf("no available UDP ports found in range %d-%d", minPort, maxPort)
|
||||
}
|
||||
Reference in New Issue
Block a user