[src/trunk]: src/sys/net tun: Report link state based on if the interface has...

[roy <roy%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/131437fc75b8
branches:  trunk
changeset: 944392:131437fc75b8
user:      roy <roy%NetBSD.org@localhost>
date:      Sun Sep 27 19:25:54 2020 +0000

description:
tun: Report link state based on if the interface has been opened or not

This mirrors tap(4).

diffstat:

 sys/net/if_tun.c |  10 +++++++---
 1 files changed, 7 insertions(+), 3 deletions(-)

diffs (50 lines):

diff -r 3db4998381db -r 131437fc75b8 sys/net/if_tun.c
--- a/sys/net/if_tun.c  Sun Sep 27 19:17:03 2020 +0000
+++ b/sys/net/if_tun.c  Sun Sep 27 19:25:54 2020 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: if_tun.c,v 1.160 2020/08/29 07:14:50 maxv Exp $        */
+/*     $NetBSD: if_tun.c,v 1.161 2020/09/27 19:25:54 roy Exp $ */
 
 /*
  * Copyright (c) 1988, Julian Onions <jpo%cs.nott.ac.uk@localhost>
@@ -19,7 +19,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: if_tun.c,v 1.160 2020/08/29 07:14:50 maxv Exp $");
+__KERNEL_RCSID(0, "$NetBSD: if_tun.c,v 1.161 2020/09/27 19:25:54 roy Exp $");
 
 #ifdef _KERNEL_OPT
 #include "opt_inet.h"
@@ -256,12 +256,12 @@
        ifp->if_start = tunstart;
 #endif
        ifp->if_flags = IFF_POINTOPOINT;
-       ifp->if_extflags = IFEF_NO_LINK_STATE_CHANGE;
        ifp->if_type = IFT_TUNNEL;
        ifp->if_snd.ifq_maxlen = ifqmaxlen;
        ifp->if_dlt = DLT_NULL;
        IFQ_SET_READY(&ifp->if_snd);
        if_attach(ifp);
+       ifp->if_link_state = LINK_STATE_DOWN;
        if_alloc_sadl(ifp);
        bpf_attach(ifp, DLT_NULL, sizeof(uint32_t));
 }
@@ -347,6 +347,7 @@
        ifp = &tp->tun_if;
        tp->tun_flags |= TUN_OPEN;
        TUNDEBUG("%s: open\n", ifp->if_xname);
+       if_link_state_change(ifp, LINK_STATE_UP);
 
        mutex_exit(&tp->tun_lock);
 
@@ -411,6 +412,9 @@
                        }
                }
        }
+
+       if_link_state_change(ifp, LINK_STATE_DOWN);
+
 out_nolock:
        return 0;
 }