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1 office 1 /**
2 * @file BArpProbe.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  
30 #ifndef BADVPN_BARPPROBE_H
31 #define BADVPN_BARPPROBE_H
32  
33 #include <stdint.h>
34  
35 #include <misc/debug.h>
36 #include <misc/debugerror.h>
37 #include <misc/arp_proto.h>
38 #include <misc/ethernet_proto.h>
39 #include <base/DebugObject.h>
40 #include <system/BDatagram.h>
41 #include <system/BReactor.h>
42  
43 #define BARPPROBE_INITIAL_WAITRECV 1000
44 #define BARPPROBE_INITIAL_NUM_ATTEMPTS 6
45 #define BARPPROBE_NOEXIST_WAITRECV 15000
46 #define BARPPROBE_EXIST_WAITSEND 15000
47 #define BARPPROBE_EXIST_WAITRECV 10000
48 #define BARPPROBE_EXIST_NUM_NOREPLY 2
49 #define BARPPROBE_EXIST_PANIC_WAITRECV 1000
50 #define BARPPROBE_EXIST_PANIC_NUM_NOREPLY 6
51  
52 #define BARPPROBE_EVENT_EXIST 1
53 #define BARPPROBE_EVENT_NOEXIST 2
54 #define BARPPROBE_EVENT_ERROR 3
55  
56 typedef void (*BArpProbe_handler) (void *user, int event);
57  
58 typedef struct {
59 uint32_t addr;
60 BReactor *reactor;
61 void *user;
62 BArpProbe_handler handler;
63 BDatagram dgram;
64 uint8_t if_mac[6];
65 PacketPassInterface *send_if;
66 int send_sending;
67 struct arp_packet send_packet;
68 PacketRecvInterface *recv_if;
69 struct arp_packet recv_packet;
70 BTimer timer;
71 int state;
72 int num_missed;
73 DebugError d_err;
74 DebugObject d_obj;
75 } BArpProbe;
76  
77 int BArpProbe_Init (BArpProbe *o, const char *ifname, uint32_t addr, BReactor *reactor, void *user, BArpProbe_handler handler) WARN_UNUSED;
78 void BArpProbe_Free (BArpProbe *o);
79  
80 #endif