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author | Christian Grothoff <christian@grothoff.org> | 2011-09-21 05:51:38 +0000 |
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committer | Christian Grothoff <christian@grothoff.org> | 2011-09-21 05:51:38 +0000 |
commit | a864897478e2ee94ab36648e7f1db6f0dd57ea43 (patch) | |
tree | 70d3026143ff9285691325ee4b243a6a2361cbd7 /src/dht/gnunet-service-dht_nse.c | |
parent | f591bfdc7b28e93b9412c2d9e031c8848ce90f55 (diff) | |
download | gnunet-a864897478e2ee94ab36648e7f1db6f0dd57ea43.tar.gz gnunet-a864897478e2ee94ab36648e7f1db6f0dd57ea43.zip |
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Diffstat (limited to 'src/dht/gnunet-service-dht_nse.c')
-rw-r--r-- | src/dht/gnunet-service-dht_nse.c | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/src/dht/gnunet-service-dht_nse.c b/src/dht/gnunet-service-dht_nse.c new file mode 100644 index 000000000..4711c9c31 --- /dev/null +++ b/src/dht/gnunet-service-dht_nse.c | |||
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1 | /* | ||
2 | This file is part of GNUnet. | ||
3 | (C) 2009, 2010, 2011 Christian Grothoff (and other contributing authors) | ||
4 | |||
5 | GNUnet is free software; you can redistribute it and/or modify | ||
6 | it under the terms of the GNU General Public License as published | ||
7 | by the Free Software Foundation; either version 3, or (at your | ||
8 | option) any later version. | ||
9 | |||
10 | GNUnet is distributed in the hope that it will be useful, but | ||
11 | WITHOUT ANY WARRANTY; without even the implied warranty of | ||
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
13 | General Public License for more details. | ||
14 | |||
15 | You should have received a copy of the GNU General Public License | ||
16 | along with GNUnet; see the file COPYING. If not, write to the | ||
17 | Free Software Foundation, Inc., 59 Temple Place - Suite 330, | ||
18 | Boston, MA 02111-1307, USA. | ||
19 | */ | ||
20 | |||
21 | /** | ||
22 | * @file dht/gnunet-service-dht_nse.c | ||
23 | * @brief GNUnet DHT integration with NSE | ||
24 | * @author Christian Grothoff | ||
25 | */ | ||
26 | #include "gnunet-service-dht.h" | ||
27 | #include "gnunet-service-dht_nse.h" | ||
28 | |||
29 | /** | ||
30 | * log of the current network size estimate, used as the point where | ||
31 | * we switch between random and deterministic routing. Default | ||
32 | * value of 4.0 is used if NSE module is not available (i.e. not | ||
33 | * configured). | ||
34 | */ | ||
35 | static double log_of_network_size_estimate = 4.0; | ||
36 | |||
37 | /** | ||
38 | * Network size estimation handle. | ||
39 | */ | ||
40 | static struct GNUNET_NSE_Handle *nse; | ||
41 | |||
42 | |||
43 | /** | ||
44 | * Callback that is called when network size estimate is updated. | ||
45 | * | ||
46 | * @param cls closure | ||
47 | * @param timestamp time when the estimate was received from the server (or created by the server) | ||
48 | * @param logestimate the log(Base 2) value of the current network size estimate | ||
49 | * @param std_dev standard deviation for the estimate | ||
50 | * | ||
51 | */ | ||
52 | static void | ||
53 | update_network_size_estimate (void *cls, struct GNUNET_TIME_Absolute timestamp, | ||
54 | double logestimate, double std_dev) | ||
55 | { | ||
56 | log_of_network_size_estimate = logestimate; | ||
57 | } | ||
58 | |||
59 | |||
60 | double | ||
61 | GDS_nse_get () | ||
62 | { | ||
63 | return log_of_network_size_estimate; | ||
64 | } | ||
65 | |||
66 | |||
67 | void | ||
68 | GDS_nse_init () | ||
69 | { | ||
70 | nse = GNUNET_NSE_connect (GDS_cfg, &update_network_size_estimate, NULL); | ||
71 | } | ||
72 | |||
73 | |||
74 | void | ||
75 | GDS_nse_done () | ||
76 | { | ||
77 | if (NULL != nse) | ||
78 | { | ||
79 | GNUNET_NSE_disconnect (nse); | ||
80 | nse = NULL; | ||
81 | } | ||
82 | } | ||
83 | |||
84 | /* end of gnunet-service-dht_nse.c */ | ||