From d61cac74b0dc667b645880b386219cacfb3c53f6 Mon Sep 17 00:00:00 2001 From: phk Date: Fri, 27 Sep 2002 18:57:47 +0000 Subject: Add the "Monitor" interface flag. Setting this flag on an ethernet interface blocks transmission of packets and discards incoming packets after BPF processing. This is useful if you want to monitor network trafic but not interact with the network in question. Sponsored by: http://www.babeltech.dk --- sbin/ifconfig/ifconfig.8 | 11 +++++++++++ sbin/ifconfig/ifconfig.c | 2 ++ 2 files changed, 13 insertions(+) (limited to 'sbin') diff --git a/sbin/ifconfig/ifconfig.8 b/sbin/ifconfig/ifconfig.8 index 39761fb..57468e9 100644 --- a/sbin/ifconfig/ifconfig.8 +++ b/sbin/ifconfig/ifconfig.8 @@ -504,6 +504,17 @@ for more information. .It Fl link Op Cm 0 No - Cm 2 .Sm on Disable special processing at the link level with the specified interface. +.It Cm monitor +.Sm on +Put the interface in monitor mode. +No packets are transmitted and received packets are discarded after +.Xr bpf 4 +processing. +.Sm off +.It Fl monitor +.Sm on +Take the interface out of monitor mode. +.Sm off .It Cm up Mark an interface .Dq up . diff --git a/sbin/ifconfig/ifconfig.c b/sbin/ifconfig/ifconfig.c index c9ab382..35ac555 100644 --- a/sbin/ifconfig/ifconfig.c +++ b/sbin/ifconfig/ifconfig.c @@ -241,6 +241,8 @@ struct cmd { { "-link1", -IFF_LINK1, setifflags }, { "link2", IFF_LINK2, setifflags }, { "-link2", -IFF_LINK2, setifflags }, + { "monitor", IFF_MONITOR, setifflags }, + { "-monitor", -IFF_MONITOR, setifflags }, #ifdef USE_IF_MEDIA { "media", NEXTARG, setmedia }, { "mediaopt", NEXTARG, setmediaopt }, -- cgit v1.1