From bf9f871fe13058a9b7ba878228a57d43225a45f4 Mon Sep 17 00:00:00 2001
From: GnomeZworc <nicolas.boufidjeline@g3e.fr>
Date: Sun, 26 Apr 2026 16:28:54 +0200
Subject: [PATCH] f-25: netif: Add tap handle

Signed-off-by: GnomeZworc <nicolas.boufidjeline@g3e.fr>
---
 internal/netif/tap_linux.go | 28 ++++++++++++++++++++++++++++
 internal/netif/tap_other.go |  9 +++++++++
 2 files changed, 37 insertions(+)
 create mode 100644 internal/netif/tap_linux.go
 create mode 100644 internal/netif/tap_other.go

diff --git a/internal/netif/tap_linux.go b/internal/netif/tap_linux.go
new file mode 100644
index 0000000..a5abc9c
--- /dev/null
+++ b/internal/netif/tap_linux.go
@@ -0,0 +1,28 @@
+//go:build linux
+
+package netif
+
+import (
+	"fmt"
+
+	"git.g3e.fr/syonad/two/internal/netns"
+	"github.com/vishvananda/netlink"
+)
+
+func CreateTap(tapID int, bridgeName, vpcName string) error {
+	name := fmt.Sprintf("tap%d", tapID)
+
+	return netns.Call(vpcName, func() error {
+		tap := &netlink.Tuntap{
+			LinkAttrs: netlink.LinkAttrs{Name: name},
+			Mode:      netlink.TUNTAP_MODE_TAP,
+		}
+		if err := netlink.LinkAdd(tap); err != nil {
+			return err
+		}
+		if err := BridgeSetMaster(name, bridgeName); err != nil {
+			return err
+		}
+		return LinkSetUp(name)
+	})
+}
diff --git a/internal/netif/tap_other.go b/internal/netif/tap_other.go
new file mode 100644
index 0000000..a81fefb
--- /dev/null
+++ b/internal/netif/tap_other.go
@@ -0,0 +1,9 @@
+//go:build !linux
+
+package netif
+
+import "errors"
+
+func CreateTap(_ int, _, _ string) error {
+	return errors.New("netif: tap not supported on this platform")
+}