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add a comment why IFF_PROMISC is handled separately for SIOCSIFFLAGS:

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Handle special case for IFF_PROMISC.  If only IFF_PROMISC
	flag is changed, do not call an_init() to avoid initiating
	reassociation to another access point.  It is really
	helpful for tcpdump(8).
This commit is contained in:
onoe 2001-05-28 00:46:35 +00:00
parent cc5935ebba
commit a62b5c1e2e
1 changed files with 7 additions and 1 deletions
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8
sys/dev/ic/an.c
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@ -1,4 +1,4 @@
/* $NetBSD: an.c,v 1.13 2001/05/24 08:12:28 itojun Exp $ */
/* $NetBSD: an.c,v 1.14 2001/05/28 00:46:35 onoe Exp $ */
/*
* Copyright (c) 1997, 1998, 1999
* Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved.
@ -1040,6 +1040,12 @@ static int an_ioctl(ifp, command, data)
switch (command) {
case SIOCSIFFLAGS:
/*
* Handle special case for IFF_PROMISC. If only IFF_PROMISC
* flag is changed, do not call an_init() to avoid initiating
* reassociation to another access point. It is really
* helpful for tcpdump(8).
*/
if ((ifp->if_flags & sc->an_if_flags &
(IFF_UP | IFF_RUNNING)) == (IFF_UP | IFF_RUNNING)) {
if (ifp->if_flags & IFF_PROMISC &&