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confuzed bit flags

To: linux-net@xxxxxxxxxxxxxxx
Subject: confuzed bit flags
From: "Randy.Dunlap" <rddunlap@xxxxxxxx>
Date: Thu, 8 May 2003 15:30:32 -0700
Cc: netdev@xxxxxxxxxxx
Organization: OSDL
Sender: netdev-bounce@xxxxxxxxxxx
I'm confused or the source code is or both.

net/ipv6/ndisc.c sets

        rt->rt6i_flags    = RTF_LOCAL;

This is OK AFAIK since RTF_LOCAL is #defined in
./linux/ipv6_route.h:36:#define RTF_LOCAL       0x80000000

But then RTF_LOCAL is never used anywhere else.  OK or not?

Further checking finds that net/ipv6/xfrm6_policy.c does this:

                x->u.rt6.rt6i_flags    = 
rt0->rt6i_flags&(RTCF_BROADCAST|RTCF_MULTICAST|RTCF_LOCAL);

but these RTCF_ bits are defined in include/linux/in_route.h,
which says:

/* IPv4 routing cache flags */

So it's nice or good that RTF_LOCAL and RTCF_LOCAL are both
#defined as 0x80000000.  Right?

Oh, I see now that there's even a comment that might be applicable
to this <stuff>:
                /* Sheit... I remember I did this right. Apparently,
                 * it was magically lost, so this code needs audit */

I guess that my (idealistic) position is that those RTCF_ bit flags
shouldn't be used here (in net/ipv6) at all.  Am I off track on this?

--
~Randy

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