iter 2, workin

go.mod

@@ -2,7 +2,11 @@ module jmoore53.com/veth-go-testing
 
 go 1.24.0
 
-require github.com/charmbracelet/lipgloss v1.1.0
+require (
+	github.com/charmbracelet/lipgloss v1.1.0
+	github.com/vishvananda/netlink v1.3.1
+	golang.org/x/sys v0.30.0
+)
 
 require (
 	github.com/aymanbagabas/go-osc52/v2 v2.0.1 // indirect
@@ -15,6 +19,6 @@ require (
 	github.com/mattn/go-runewidth v0.0.16 // indirect
 	github.com/muesli/termenv v0.16.0 // indirect
 	github.com/rivo/uniseg v0.4.7 // indirect
+	github.com/vishvananda/netns v0.0.5 // indirect
 	github.com/xo/terminfo v0.0.0-20220910002029-abceb7e1c41e // indirect
-	golang.org/x/sys v0.30.0 // indirect
 )

go.sum

@@ -21,10 +21,16 @@ github.com/muesli/termenv v0.16.0/go.mod h1:ZRfOIKPFDYQoDFF4Olj7/QJbW60Ol/kL1pU3
 github.com/rivo/uniseg v0.2.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
 github.com/rivo/uniseg v0.4.7 h1:WUdvkW8uEhrYfLC4ZzdpI2ztxP1I582+49Oc5Mq64VQ=
 github.com/rivo/uniseg v0.4.7/go.mod h1:FN3SvrM+Zdj16jyLfmOkMNblXMcoc8DfTHruCPUcx88=
+github.com/vishvananda/netlink v1.3.1 h1:3AEMt62VKqz90r0tmNhog0r/PpWKmrEShJU0wJW6bV0=
+github.com/vishvananda/netlink v1.3.1/go.mod h1:ARtKouGSTGchR8aMwmkzC0qiNPrrWO5JS/XMVl45+b4=
+github.com/vishvananda/netns v0.0.5 h1:DfiHV+j8bA32MFM7bfEunvT8IAqQ/NzSJHtcmW5zdEY=
+github.com/vishvananda/netns v0.0.5/go.mod h1:SpkAiCQRtJ6TvvxPnOSyH3BMl6unz3xZlaprSwhNNJM=
 github.com/xo/terminfo v0.0.0-20220910002029-abceb7e1c41e h1:JVG44RsyaB9T2KIHavMF/ppJZNG9ZpyihvCd0w101no=
 github.com/xo/terminfo v0.0.0-20220910002029-abceb7e1c41e/go.mod h1:RbqR21r5mrJuqunuUZ/Dhy/avygyECGrLceyNeo4LiM=
 golang.org/x/exp v0.0.0-20220909182711-5c715a9e8561 h1:MDc5xs78ZrZr3HMQugiXOAkSZtfTpbJLDr/lwfgO53E=
 golang.org/x/exp v0.0.0-20220909182711-5c715a9e8561/go.mod h1:cyybsKvd6eL0RnXn6p/Grxp8F5bW7iYuBgsNCOHpMYE=
+golang.org/x/sys v0.2.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.10.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.30.0 h1:QjkSwP/36a20jFYWkSue1YwXzLmsV5Gfq7Eiy72C1uc=
 golang.org/x/sys v0.30.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=

main.go

@@ -3,47 +3,83 @@ package main
 import (
 	"fmt"
 	"net"
+
 	"github.com/charmbracelet/lipgloss"
+	"github.com/vishvananda/netlink"
+	"golang.org/x/sys/unix"
 )
 
 func main() {
-	// Define styles
+	// Styles
 	headerStyle := lipgloss.NewStyle().Bold(true).Foreground(lipgloss.Color("63"))
 	ipStyle := lipgloss.NewStyle().Foreground(lipgloss.Color("203"))
 	upStyle := lipgloss.NewStyle().Foreground(lipgloss.Color("42"))
 	downStyle := lipgloss.NewStyle().Foreground(lipgloss.Color("196"))
 	addrStyle := lipgloss.NewStyle().Faint(true)
+	infoStyle := lipgloss.NewStyle().Foreground(lipgloss.Color("33"))
 
-	interfaces, err := net.Interfaces()
+	// Get all links
+	links, err := netlink.LinkList()
 	if err != nil {
-		fmt.Println("Error:", err)
+		fmt.Println("Error listing links:", err)
 		return
 	}
 
-	for _, iface := range interfaces {
+	for _, link := range links {
+		attrs := link.Attrs()
+		if attrs == nil {
+			continue
+		}
+
+		// Link state
 		state := downStyle.Render("DOWN")
-		if iface.Flags&net.FlagUp != 0 {
+		if attrs.Flags&net.FlagUp != 0 {
 			state = upStyle.Render("UP")
 		}
 
-		fmt.Print(headerStyle.Render(iface.Name), " ")
-		fmt.Printf(addrStyle.Render(" %s"), iface.HardwareAddr)
-		fmt.Printf(addrStyle.Render(" %d"), iface.MTU)
+		// 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)
 
-		addrs, err := iface.Addrs()
+		// IPv4 addresses
+		addrs, err := netlink.AddrList(link, unix.AF_INET)
 		if err != nil {
 			fmt.Println("  Error getting addresses:", err)
 			continue
 		}
-
 		for _, addr := range addrs {
-			ipNet, ok := addr.(*net.IPNet)
-			if !ok || ipNet.IP.To4() == nil {
-				continue // Skip if not an IPv4 address
+			fmt.Println("  ", ipStyle.Render(addr.IPNet.String()))
+		}
+
+
+		// 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
+				}
+			}
+
+			if !peerFound {
+				fmt.Println("  ", infoStyle.Render("Peer likely in another namespace"))
 			}
-			fmt.Println("  ", ipStyle.Render(addr.String()))
 		}
 		fmt.Println()
+
 	}
 }
+
+