feat: Do not quit when keyfile can not be opened, create key

- Refactor AddTestPeer

Signed-off-by: HeshamTB <hishaminv@gmail.com>

cmd/hvpn-node/hvpn-node.go

@@ -4,10 +4,8 @@ import (
 	"bufio"
 	"fmt"
 	"log/slog"
-	"net"
 	"net/http"
 	"net/netip"
-	"net/url"
 	"os"
 	"os/signal"
 	"strings"
@@ -210,7 +208,7 @@ func setup(ctx *cli.Context) error {
         if err != nil {
             return cli.Exit(err, 1)
         }
-        slog.Debug(fmt.Sprintf("Private key: %s", privateKey.String()))
+        slog.Debug(fmt.Sprintf("new public key: %s", privateKey.PublicKey().String()))
         return nil
     }
 
@@ -223,8 +221,13 @@ func setup(ctx *cli.Context) error {
         privKeyFile, err := os.Open(PrivateKeyPath)
         defer privKeyFile.Close()
         if err != nil {
-            return cli.Exit(err, 1)
+            slog.Error(err.Error())
+            slog.Info("Could not open private key file")
+            err := createPrivKey()
+            if err != nil {
+                return err
             }
+        } else {
             privateKeyStr := make([]byte, 45)
             n, err := privKeyFile.Read(privateKeyStr)
             if err != nil {
@@ -242,6 +245,7 @@ func setup(ctx *cli.Context) error {
             }
             slog.Debug("Private key parsed and is correct")
         }
+    }
 
     wg, err := hvpnnode3.InitWGLink(
         InterfaceName, 
@@ -275,7 +279,7 @@ func setup(ctx *cli.Context) error {
 
     ipPool, err := hvpnnode3.NewPool(VPNIPCIDR)
     if err != nil {
-        slog.Error(fmt.Sprintf("main.IPPool: %s", err))
+        slog.Error(fmt.Sprintf("IPPool: %s", err))
         os.Exit(1)
     }
     slog.Debug(fmt.Sprintf("Init ip pool %s", VPNIPCIDR))
@@ -286,13 +290,13 @@ func setup(ctx *cli.Context) error {
         os.Exit(1)
     }
 
-    slog.Debug(fmt.Sprintf("main.testVip: IP Pool Test IP: %s", testVip.String()))
+    slog.Debug(fmt.Sprintf("IP Pool Test IP: %s", testVip.String()))
     err = ipPool.Free(testVip)
     if err != nil {
-        slog.Error("main.testVip: Could not free test Vip from IPPool!", err)
-        os.Exit(1)
+        slog.Error("Could not free test Vip from IPPool!", err)
+        return cli.Exit(err.Error(), 1)
     }
-    slog.Debug("main.testVip: Test IP Freed")
+    slog.Debug("Test IP Freed")
 
     IPPool = ipPool
     wgLink.IPPool = ipPool
@@ -328,47 +332,22 @@ func testWgPeerAdd(wgLink *hvpnnode3.WGLink) error {
         return err
     }
     publicKey := privateKey.PublicKey()
+    _, err = wgLink.AddPeer(publicKey.String())
+    if err != nil {
+        slog.Error(err.Error())
+        return err
+    }
+    slog.Debug(fmt.Sprintf("Added test peer %v", publicKey.String()))
     
-    urlsafe := url.QueryEscape(publicKey.String())
-    slog.Debug(urlsafe)
-
-    ip, err := wgLink.Allocate()
+    err = wgLink.DeletePeer(publicKey.String())
     if err != nil {
         return err
     }
-
-    peerConfig := wgtypes.PeerConfig{
-        PublicKey: publicKey,
-        AllowedIPs: []net.IPNet{
-            {
-                IP: ip,
-                Mask: net.IPv4Mask(255, 255, 255, 255),
-            },
-        },
-    }
-
-    wgConfig := wgtypes.Config{
-        Peers: []wgtypes.PeerConfig{peerConfig},
-    }
-
-    err = wgLink.ConfigureDevice(wgLink.Name, wgConfig)
-
-    if err != nil {
-        return err
-    }
-    slog.Debug(fmt.Sprintf("Added test peer %v", peerConfig.PublicKey))
-
-    wgConfig.ReplacePeers = true
-    wgConfig.Peers = []wgtypes.PeerConfig{}
-
-    err = wgLink.ConfigureDevice(wgLink.Name, wgConfig)
-    if err != nil {
-        return err
+    peers, err := wgLink.GetAllPeers()
+    if len(peers) != 0 {
+        slog.Warn(fmt.Sprintf("Expected 0 peers, got %d", len(peers)))
     }
     slog.Debug("Removed test peer")
-    wgLink.Free(ip)
-    slog.Debug("Freed test peer ip")
-
 
     return nil
 }

link.go

@@ -185,12 +185,13 @@ func (wg *WGLink) GetPeer(publickey string) (*wgtypes.Peer, error) {
 }
 
 func (wg *WGLink) getPeer(pubkey wgtypes.Key) (*wgtypes.Peer, error) {
-    dev, err := wg.Device(wg.Name)
+    
+    peers, err := wg.GetAllPeers()
     if err != nil {
         return nil, err
     }
 
-    for _, peer := range dev.Peers {
+    for _, peer := range peers {
         if peer.PublicKey == pubkey {
             return &peer, nil
         }
@@ -198,6 +199,14 @@ func (wg *WGLink) getPeer(pubkey wgtypes.Key) (*wgtypes.Peer, error) {
     return nil, proto.PeerDoesNotExist
 }
 
+func (wg *WGLink) GetAllPeers() ([]wgtypes.Peer, error) {
+    dev, err := wg.Device(wg.Name)
+    if err != nil {
+        return nil, err
+    }
+    return dev.Peers, nil
+}
+
 func createARemovePeerCfg(publickey wgtypes.Key) wgtypes.Config {
     rmPeerCfg := wgtypes.PeerConfig{
         Remove: true,