feat: Read stdin for commands to exit

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

cmd/hvpn-node/hvpn-node.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"bufio"
 	"fmt"
 	"log/slog"
 	"net"
@@ -9,6 +10,7 @@ import (
 	"net/url"
 	"os"
 	"os/signal"
+	"strings"
 	"time"
 
 	"github.com/urfave/cli/v2"
@@ -20,7 +22,7 @@ import (
 /*
    Can change all therse vars to local func vars
    IPPool can be internal to wglink or other abstraction. As well as
-   POrt, ifname and CIDR and so on. Use Clie.ctx to get the values
+   Port, ifname and CIDR and so on. Use Clie.ctx to get the values
 */
 
 var IPPool hvpnnode3.IPPool
@@ -271,12 +273,18 @@ func setup() error {
     wgLink.IPPool = ipPool
 
     //defer wgLink.Close()
+    cInput := make(chan struct{})
+    go handleStdin(cInput)
     c := make(chan os.Signal, 1)
     signal.Notify(c, os.Interrupt, os.Kill)
     go func() {
-        slog.Debug("Listening for SIGINT, SIGKILL")
+        slog.Info("Listening for SIGINT, SIGKILL and user input")
-        <- c
+        select {
-        slog.Warn("Recived SIGINT! Closing Wireguard Device")
+        case <- c:
+            slog.Warn("Recived SIGINT! Closing Wireguard Device")
+        case <- cInput:
+            slog.Warn("Recieved quit! Closing Wireguard Device")
+        }
         wgLink.Close()
         os.Exit(0)
     }()
@@ -340,3 +348,14 @@ func testWgPeerAdd(wgLink *hvpnnode3.WGLink) error {
     return nil
 }
 
+func handleStdin(c chan struct{}) {
+    for {
+        reader := bufio.NewReader(os.Stdin)
+        slog.Info("Enter 'q' or 'exit' to quit")
+        in, _ := reader.ReadString('\n')
+        in = strings.ReplaceAll(in, "\n", "")
+        if in == "q" || in == "exit" {
+            c <- struct{}{}
+        }
+    }
+}