# --- T2-COPYRIGHT-NOTE-BEGIN ---
# T2 SDE: package/*/gxemul/linux-tap.patch
# Copyright (C) 2022 The T2 SDE Project
# 
# This Copyright note is generated by scripts/Create-CopyPatch,
# more information can be found in the files COPYING and README.
# 
# This patch file is dual-licensed. It is available under the license the
# patched project is licensed under, as long as it is an OpenSource license
# as defined at http://www.opensource.org/ (e.g. BSD, X11) or under the terms
# of the GNU General Public License version 2 as used by the T2 SDE.
# --- T2-COPYRIGHT-NOTE-END ---

--- gxemul-0.7.0/src/net/net_tap.c.vanilla	2022-07-19 12:56:49.595843435 +0200
+++ gxemul-0.7.0/src/net/net_tap.c	2022-07-19 13:06:28.069820370 +0200
@@ -45,6 +45,9 @@
 #include <string.h>
 #include <unistd.h> 
 
+#include <net/if.h>
+#include <linux/if_tun.h>
+
 #include "misc.h"
 #include "net.h"
 
@@ -163,13 +163,36 @@
  */
 bool net_tap_init(struct net *net, const char *tapdev)
 {
-	int fd;
+	int fd, ret, features;
 	int one = 1;
 
-	fd = open(tapdev, O_RDWR);
+	fd = open("/dev/net/tun", O_RDWR);
 	if (fd < 0) {
 		debugmsg(SUBSYS_NET, "tap", VERBOSITY_ERROR,
-		    "unable to open tap device '%s': %s",
+			"unable to open tap device '%s': %s",
+			tapdev, strerror(errno));
+		return false;
+	}
+
+	if (ioctl(fd, TUNGETFEATURES, &features) == -1) {
+		debugmsg(SUBSYS_NET, "tap", VERBOSITY_ERROR, "%s", strerror(errno));
+		features = 0;
+	}
+
+       struct ifreq ifr;
+       memset(&ifr, 0, sizeof(ifr));
+       ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
+
+	if (features & IFF_ONE_QUEUE) {
+		ifr.ifr_flags |= IFF_ONE_QUEUE;
+	}
+
+	strcpy(ifr.ifr_name, tapdev);
+
+	ret = ioctl(fd, TUNSETIFF, (void *)&ifr);
+	if (ret != 0) {
+		debugmsg(SUBSYS_NET, "tap", VERBOSITY_ERROR,
+		    "unable to configure tap device '%s': %s",
 		    tapdev, strerror(errno));
 		return false;
 	}