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| author | Joel Sherrill <joel.sherrill@OARcorp.com> | 1998-12-10 19:42:29 +0000 |
|---|---|---|
| committer | Joel Sherrill <joel.sherrill@OARcorp.com> | 1998-12-10 19:42:29 +0000 |
| commit | a3d0b8a79a432820dee80b1583f1acf86d256e97 (patch) | |
| tree | 7d399d0a3c740fc3fae41c7b06e5f05aaf44447e /c/src/lib/include | |
| parent | Patch from Ian Lance Taylor <ian@airs.com>: (diff) | |
| download | rtems-a3d0b8a79a432820dee80b1583f1acf86d256e97.tar.bz2 | |
Patch from Ian Lance Taylor <ian@airs.com>:
From: Eric Norum <eric@skatter.usask.ca>
Date: Sat, 5 Dec 98 13:20:51 -0600
What do you think of this patch? It implements your `tap'
suggestion in a way that adds support for all ethernet devices with
no driver modifications. I also added a return value from the tap
function. If the return value is zero, the packet will be passed up
the chain as usual. If the return value is non-zero the mbuf holding
the packet will be freed and the packet will be dropped.
If you like it, please submit it to Joel.
I guess there needs to be an addition to the network documentation
describing the additional ioctl's -- and a big warning that the tap
function is called from a context that holds the network semaphore.
Here is Eric's patch. I've tested it a bit, and made a couple of
trivial changes. This is certainly better than mine: it should work
for all Ethernet drivers.
==================================================
The only concern I have about this patch is that the tap function may
want to fiddle with the mbuf, calling functions like m_pullup and the
like. If those force the networking code to rearrange the mbuf
structure, then the caller's call to m_freem may crash. I don't know
if this is a realistic concern--I don't know enough about the mbuf
layer.
Diffstat (limited to 'c/src/lib/include')
| -rw-r--r-- | c/src/lib/include/sys/sockio.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/c/src/lib/include/sys/sockio.h b/c/src/lib/include/sys/sockio.h index 020061170f..03ec16e43a 100644 --- a/c/src/lib/include/sys/sockio.h +++ b/c/src/lib/include/sys/sockio.h @@ -83,4 +83,11 @@ #define SIOCSIFMEDIA _IOWR('i', 55, struct ifreq) /* set net media */ #define SIOCGIFMEDIA _IOWR('i', 56, struct ifmediareq) /* get net media */ + +/* + * RTEMS additions for setting/getting `tap' function on incoming packets. + */ +#define SIOCSIFTAP _IOW('i', 80, struct ifreq) /* set tap function */ +#define SIOCGIFTAP _IOWR('i', 81, struct ifreq) /* get tap function */ + #endif /* !_SYS_SOCKIO_H_ */ |