ctapdev: create tap devices with carrier off

Since linux 6.0 it is possible to create tap devices with the carrier off instead of needing to set it off after creation [1]. This prevents a race between bring up and setting the carrier off. [1] torvalds/linux@195624d Signed-off-by: Jonas Gorski <[email protected]>
bisdn · Feb 14, 2024 · 8d50e8c · 8d50e8c
1 parent ad9ca1a
commit 8d50e8c
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/netlink/ctapdev.cc b/src/netlink/ctapdev.cc
@@ -43,7 +43,7 @@ void ctapdev::tap_open() {
   }
 
   memset(&ifr, 0, sizeof(ifr));
-  ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
+  ifr.ifr_flags = IFF_TAP | IFF_NO_PI | IFF_NO_CARRIER;
   strncpy(ifr.ifr_name, devname.c_str(), IFNAMSIZ - 1);
   hwaddr.pack(reinterpret_cast<uint8_t *>(ifr.ifr_hwaddr.sa_data), ETH_ALEN);