iter 3

main.go

@@ -2,15 +2,19 @@ package main
 
 import (
 	"fmt"
+	"io/ioutil"
 	"net"
+	//"os"
+	"path/filepath"
+	//"strings"
 
 	"github.com/charmbracelet/lipgloss"
 	"github.com/vishvananda/netlink"
+	"github.com/vishvananda/netns"
 	"golang.org/x/sys/unix"
 )
 
 func main() {
-	// Styles
 	headerStyle := lipgloss.NewStyle().Bold(true).Foreground(lipgloss.Color("63"))
 	ipStyle := lipgloss.NewStyle().Foreground(lipgloss.Color("203"))
 	upStyle := lipgloss.NewStyle().Foreground(lipgloss.Color("42"))
@@ -18,7 +22,14 @@ func main() {
 	addrStyle := lipgloss.NewStyle().Faint(true)
 	infoStyle := lipgloss.NewStyle().Foreground(lipgloss.Color("33"))
 
-	// Get all links
+	// Save the current netns
+	origNS, err := netns.Get()
+	if err != nil {
+		fmt.Println("Error getting current netns:", err)
+		return
+	}
+	defer origNS.Close()
+
 	links, err := netlink.LinkList()
 	if err != nil {
 		fmt.Println("Error listing links:", err)
@@ -31,55 +42,89 @@ func main() {
 			continue
 		}
 
-		// Link state
 		state := downStyle.Render("DOWN")
 		if attrs.Flags&net.FlagUp != 0 {
 			state = upStyle.Render("UP")
 		}
 
-		// Interface header
 		fmt.Print(headerStyle.Render(attrs.Name), " ")
 		fmt.Printf(addrStyle.Render(" %s"), attrs.HardwareAddr)
 		fmt.Printf(addrStyle.Render(" %d"), attrs.MTU)
 		fmt.Printf(" %s\n", state)
 
-		// IPv4 addresses
+		// IP addresses (IPv4 only)
 		addrs, err := netlink.AddrList(link, unix.AF_INET)
-		if err != nil {
-			fmt.Println("  Error getting addresses:", err)
+		if err == nil {
+			for _, addr := range addrs {
+				fmt.Println("  ", ipStyle.Render(addr.IPNet.String()))
+			}
+		}
+
+		if link.Type() != "veth" {
+			fmt.Println()
 			continue
 		}
-		for _, addr := range addrs {
-			fmt.Println("  ", ipStyle.Render(addr.IPNet.String()))
-		}
 
+		fmt.Println("  ", infoStyle.Render("Veth interface"))
 
-		// Veth handling
-		if link.Type() == "veth" {
-			fmt.Println("  ", infoStyle.Render("Veth interface"))
-
-			// Try to find peer by looking for other veths with same parent or hint from name
-			// No peer name is available here, so we must guess
-			// We'll mention that if no matching veth exists, it's likely in another netns
-			peerFound := false
-			for _, other := range links {
-				if other.Attrs().Index == attrs.Index {
-					continue
-				}
-				if other.Type() == "veth" && other.Attrs().ParentIndex == attrs.Index {
-					fmt.Println("  ", infoStyle.Render("Likely peer:"), other.Attrs().Name)
-					peerFound = true
-					break
-				}
+		// Try to find peer locally
+		peerFound := false
+		for _, other := range links {
+			if other.Attrs().Index == attrs.Index {
+				continue
 			}
-
-			if !peerFound {
-				fmt.Println("  ", infoStyle.Render("Peer likely in another namespace"))
+			if other.Type() == "veth" && other.Attrs().ParentIndex == attrs.Index {
+				fmt.Println("  ", infoStyle.Render("Likely peer:"), other.Attrs().Name)
+				peerFound = true
+				break
 			}
 		}
+
+		// If not found, scan /var/run/netns/
+		if !peerFound {
+			netnsDir := "/var/run/netns/"
+			entries, err := ioutil.ReadDir(netnsDir)
+			if err != nil {
+				fmt.Println("  ", infoStyle.Render("Could not scan netns dir"))
+			} else {
+				for _, entry := range entries {
+					nsPath := filepath.Join(netnsDir, entry.Name())
+
+					nsHandle, err := netns.GetFromPath(nsPath)
+					if err != nil {
+						continue
+					}
+
+					if err := netns.Set(nsHandle); err != nil {
+						nsHandle.Close()
+						continue
+					}
+
+					remoteLinks, err := netlink.LinkList()
+					if err == nil {
+						for _, rl := range remoteLinks {
+							if rl.Type() == "veth" && rl.Attrs().ParentIndex == attrs.Index {
+								fmt.Println("  ", infoStyle.Render("Peer in namespace:"), entry.Name(), "as", rl.Attrs().Name)
+								peerFound = true
+								break
+							}
+						}
+					}
+					nsHandle.Close()
+					netns.Set(origNS)
+
+					if peerFound {
+						break
+					}
+				}
+			}
+		}
+
+		if !peerFound {
+			fmt.Println("  ", infoStyle.Render("Peer not found — may be deleted or hidden"))
+		}
+
 		fmt.Println()
-
 	}
 }
 
-