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1 office 1 /**
2 * @file SCKeepaliveSource.h
3 * @author Ambroz Bizjak <ambrop7@gmail.com>
4 *
5 * @section LICENSE
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. Neither the name of the author nor the
15 * names of its contributors may be used to endorse or promote products
16 * derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
20 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
21 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
22 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
23 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
24 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
25 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
27 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 *
29 * @section DESCRIPTION
30 *
31 * A {@link PacketRecvInterface} source which provides SCProto keepalive packets.
32 */
33  
34 #ifndef BADVPN_SCKEEPALIVESOURCE_H
35 #define BADVPN_SCKEEPALIVESOURCE_H
36  
37 #include <base/DebugObject.h>
38 #include <flow/PacketRecvInterface.h>
39  
40 /**
41 * A {@link PacketRecvInterface} source which provides SCProto keepalive packets.
42 */
43 typedef struct {
44 DebugObject d_obj;
45 PacketRecvInterface output;
46 } SCKeepaliveSource;
47  
48 /**
49 * Initializes the object.
50 *
51 * @param o the object
52 * @param pg pending group
53 */
54 void SCKeepaliveSource_Init (SCKeepaliveSource *o, BPendingGroup *pg);
55  
56 /**
57 * Frees the object.
58 *
59 * @param o the object
60 */
61 void SCKeepaliveSource_Free (SCKeepaliveSource *o);
62  
63 /**
64 * Returns the output interface.
65 * The MTU of the output interface will be sizeof(struct sc_header).
66 *
67 * @param o the object
68 * @return output interface
69 */
70 PacketRecvInterface * SCKeepaliveSource_GetOutput (SCKeepaliveSource *o);
71  
72 #endif