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To: jgarzik@xxxxxxxxxxxxxxxx
Subject: Re: IFF_PROMISC bug?
From: "David S. Miller" <davem@xxxxxxxxxx>
Date: Wed, 13 Feb 2002 00:43:47 -0800 (PST)
Cc: ak@xxxxxxx, linux-net@xxxxxxxxxxxxxxx, netdev@xxxxxxxxxxx, kuznet@xxxxxxxxxxxxx
In-reply-to: <>
References: <> <> <>
Sender: owner-netdev@xxxxxxxxxxx
   From: Jeff Garzik <jgarzik@xxxxxxxxxxxxxxxx>
   Date: Wed, 13 Feb 2002 03:33:41 -0500
   When I boot into 2.2 MDK or custom kernel, SIOCGIFFLAGS indicates
   IFF_PROMISC when tcpdump is running.
   When I boot into 2.4 MDK or custom kernel, SIOCGIFFLAGS does not
   indicate IFF_PROMISC under the same conditions.

Jeff, please, go into v2.2/linux/net/packet/af_packet.c and
read the comment above CONFIG_PACKET_MULTICAST and the code that
macro's definition controls.

In particular, read the commentary about multicast routing

Something is different, perhaps your kernel is configured differently
or something else, but something is different as the code is

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