source: rtems/c/src/lib/include/sys/sockio.h @ a3d0b8a

4.104.114.84.9
Last change on this file since a3d0b8a was a3d0b8a, checked in by Joel Sherrill <joel.sherrill@…>, on Dec 10, 1998 at 7:42:29 PM

Patch from Ian Lance Taylor <ian@…>:

From: Eric Norum <eric@…>
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.

  • Property mode set to 100644
File size: 4.9 KB
Line 
1/*-
2 * Copyright (c) 1982, 1986, 1990, 1993, 1994
3 *      The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *      This product includes software developed by the University of
16 *      California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 *      @(#)sockio.h    8.1 (Berkeley) 3/28/94
34 * $Id$
35 */
36
37#ifndef _SYS_SOCKIO_H_
38#define _SYS_SOCKIO_H_
39
40#include <sys/ioccom.h>
41
42/* Socket ioctl's. */
43#define SIOCSHIWAT       _IOW('s',  0, int)             /* set high watermark */
44#define SIOCGHIWAT       _IOR('s',  1, int)             /* get high watermark */
45#define SIOCSLOWAT       _IOW('s',  2, int)             /* set low watermark */
46#define SIOCGLOWAT       _IOR('s',  3, int)             /* get low watermark */
47#define SIOCATMARK       _IOR('s',  7, int)             /* at oob mark? */
48#define SIOCSPGRP        _IOW('s',  8, int)             /* set process group */
49#define SIOCGPGRP        _IOR('s',  9, int)             /* get process group */
50
51#define SIOCADDRT        _IOW('r', 10, struct ortentry) /* add route */
52#define SIOCDELRT        _IOW('r', 11, struct ortentry) /* delete route */
53#define SIOCGETVIFCNT   _IOWR('r', 15, struct sioc_vif_req)/* get vif pkt cnt */
54#define SIOCGETSGCNT    _IOWR('r', 16, struct sioc_sg_req) /* get s,g pkt cnt */
55
56#define SIOCSIFADDR      _IOW('i', 12, struct ifreq)    /* set ifnet address */
57#define OSIOCGIFADDR    _IOWR('i', 13, struct ifreq)    /* get ifnet address */
58#define SIOCGIFADDR     _IOWR('i', 33, struct ifreq)    /* get ifnet address */
59#define SIOCSIFDSTADDR   _IOW('i', 14, struct ifreq)    /* set p-p address */
60#define OSIOCGIFDSTADDR _IOWR('i', 15, struct ifreq)    /* get p-p address */
61#define SIOCGIFDSTADDR  _IOWR('i', 34, struct ifreq)    /* get p-p address */
62#define SIOCSIFFLAGS     _IOW('i', 16, struct ifreq)    /* set ifnet flags */
63#define SIOCGIFFLAGS    _IOWR('i', 17, struct ifreq)    /* get ifnet flags */
64#define OSIOCGIFBRDADDR _IOWR('i', 18, struct ifreq)    /* get broadcast addr */
65#define SIOCGIFBRDADDR  _IOWR('i', 35, struct ifreq)    /* get broadcast addr */
66#define SIOCSIFBRDADDR   _IOW('i', 19, struct ifreq)    /* set broadcast addr */
67#define OSIOCGIFCONF    _IOWR('i', 20, struct ifconf)   /* get ifnet list */
68#define SIOCGIFCONF     _IOWR('i', 36, struct ifconf)   /* get ifnet list */
69#define OSIOCGIFNETMASK _IOWR('i', 21, struct ifreq)    /* get net addr mask */
70#define SIOCGIFNETMASK  _IOWR('i', 37, struct ifreq)    /* get net addr mask */
71#define SIOCSIFNETMASK   _IOW('i', 22, struct ifreq)    /* set net addr mask */
72#define SIOCGIFMETRIC   _IOWR('i', 23, struct ifreq)    /* get IF metric */
73#define SIOCSIFMETRIC    _IOW('i', 24, struct ifreq)    /* set IF metric */
74#define SIOCDIFADDR      _IOW('i', 25, struct ifreq)    /* delete IF addr */
75#define SIOCAIFADDR      _IOW('i', 26, struct ifaliasreq)/* add/chg IF alias */
76
77#define SIOCADDMULTI     _IOW('i', 49, struct ifreq)    /* add m'cast addr */
78#define SIOCDELMULTI     _IOW('i', 50, struct ifreq)    /* del m'cast addr */
79#define SIOCGIFMTU      _IOWR('i', 51, struct ifreq)    /* get IF mtu */
80#define SIOCSIFMTU       _IOW('i', 52, struct ifreq)    /* set IF mtu */
81#define SIOCGIFPHYS     _IOWR('i', 53, struct ifreq)    /* get IF wire */
82#define SIOCSIFPHYS      _IOW('i', 54, struct ifreq)    /* set IF wire */
83#define SIOCSIFMEDIA    _IOWR('i', 55, struct ifreq)    /* set net media */
84#define SIOCGIFMEDIA    _IOWR('i', 56, struct ifmediareq) /* get net media */
85
86
87/*
88 * RTEMS additions for setting/getting `tap' function on incoming packets.
89 */
90#define SIOCSIFTAP       _IOW('i', 80, struct ifreq)    /* set tap function */
91#define SIOCGIFTAP      _IOWR('i', 81, struct ifreq)    /* get tap function */
92
93#endif /* !_SYS_SOCKIO_H_ */
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