From 96e4fc040f9ae92f1a5b637384bbe2f60be648f5 Mon Sep 17 00:00:00 2001
From: Koichiro IWAO <meta@vmeta.jp>
Date: Thu, 1 Jun 2023 15:10:42 +0900
Subject: [PATCH] Cedar/VLanUnix: add description to FreeBSD tap device

$ ifconfig vpn_client
vpn_client: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        description: SoftEther Virtual Network Adapter
        options=80000<LINKSTATE>
        ether 5e:51:5e:48:ea:ef
        hwaddr 58:9c:fc:10:34:2a
        groups: tap
        media: Ethernet autoselect
        status: active
        nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
        Opened by PID 35981
---
 src/Cedar/VLanUnix.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/Cedar/VLanUnix.c b/src/Cedar/VLanUnix.c
index 01d09d64..633c4fd9 100644
--- a/src/Cedar/VLanUnix.c
+++ b/src/Cedar/VLanUnix.c
@@ -470,6 +470,17 @@ int UnixCreateTapDeviceEx(char *name, char *prefix, UCHAR *mac_address, bool cre
 			ioctl(s, SIOCSIFLLADDR, &ifr);
 		}
 
+		// Set interface description
+#ifdef	SIOCSIFDESCR
+		{
+			char desc[] = CEDAR_PRODUCT_STR " Virtual Network Adapter";
+
+			ifr.ifr_buffer.buffer = desc;
+			ifr.ifr_buffer.length = StrLen(desc) + 1;
+			ioctl(s, SIOCSIFDESCR, &ifr);
+		}
+#endif
+
 		if (create_up)
 		{
 			Zero(&ifr, sizeof(ifr));