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11 * provided, however, that:
12 * 1. Any and all reproductions of the source or object code must include the
13 * copyright notice above and the following disclaimer of warranties; and
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15 * Communications, Inc. trademarks, including the mark "WHISTLE
16 * COMMUNICATIONS" on advertising, endorsements, or otherwise except as
17 * such appears in the above copyright notice or in the software.
19 * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
20 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
21 * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
22 * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
23 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
24 * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
25 * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
26 * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
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28 * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
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34 * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
37 * Author: Julian Elisher <julian@freebsd.org>
39 * $FreeBSD: src/sys/netgraph/ng_echo.c,v 1.4.2.1 2000/10/24 18:36:44 julian Exp $
40 * $DragonFly: src/sys/netgraph/echo/ng_echo.c,v 1.3 2003/08/07 21:17:31 dillon Exp $
41 * $Whistle: ng_echo.c,v 1.13 1999/11/01 09:24:51 julian Exp $
45 * Netgraph "echo" node
47 * This node simply bounces data and messages back to whence they came.
50 #include <sys/param.h>
51 #include <sys/kernel.h>
52 #include <sys/malloc.h>
54 #include <netgraph/ng_message.h>
55 #include <netgraph/netgraph.h>
58 /* Netgraph methods */
59 static ng_rcvmsg_t nge_rcvmsg
;
60 static ng_rcvdata_t nge_rcvdata
;
61 static ng_disconnect_t nge_disconnect
;
64 static struct ng_type typestruct
= {
79 NETGRAPH_INIT(echo
, &typestruct
);
82 * Receive control message. We just bounce it back as a reply.
85 nge_rcvmsg(node_p node
, struct ng_mesg
*msg
, const char *retaddr
,
86 struct ng_mesg
**rptr
)
89 msg
->header
.flags
|= NGF_RESP
;
92 FREE(msg
, M_NETGRAPH
);
101 nge_rcvdata(hook_p hook
, struct mbuf
*m
, meta_p meta
)
105 NG_SEND_DATA(error
, hook
, m
, meta
);
110 * Removal of the last link destroys the nodeo
113 nge_disconnect(hook_p hook
)
115 if (hook
->node
->numhooks
== 0)
116 ng_rmnode(hook
->node
);