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1/*
2 This file is part of GNUnet
3 Copyright (C) 2008--2013 GNUnet e.V.
4
5 GNUnet is free software: you can redistribute it and/or modify it
6 under the terms of the GNU Affero General Public License as published
7 by the Free Software Foundation, either version 3 of the License,
8 or (at your 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 Affero General Public License for more details.
14
15 You should have received a copy of the GNU Affero General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>.
17
18 SPDX-License-Identifier: AGPL3.0-or-later
19 */
20
21/**
22 * @file testbed/testbed_api_topology.h
23 * @brief header for intra library exported functions
24 * @author Sree Harsha Totakura <sreeharsha@totakura.in>
25 */
26
27#ifndef TESTBED_API_TOPOLOGY_H
28#define TESTBED_API_TOPOLOGY_H
29
30/**
31 * Returns the number of links that are required to generate a 2d torus for the
32 * given number of peers. Also returns the arrangement (number of rows and the
33 * length of each row)
34 *
35 * @param num_peers number of peers
36 * @param rows number of rows in the 2d torus. Can be NULL.
37 * @param rows_len the length of each row. This array will be allocated
38 * fresh. The caller should free it. Can be NULL.
39 */
40unsigned int
41GNUNET_TESTBED_2dtorus_calc_links (unsigned int num_peers, unsigned int *rows,
42 unsigned int **rows_len);
43
44
45/**
46 * Get a topology from a string input.
47 *
48 * @param topology where to write the retrieved topology
49 * @param topology_string The string to attempt to
50 * get a configuration value from
51 * @return GNUNET_YES if topology string matched a
52 * known topology, GNUNET_NO if not
53 */
54int
55GNUNET_TESTBED_topology_get_ (enum GNUNET_TESTBED_TopologyOption *topology,
56 const char *topology_string);
57
58
59/**
60 * Returns the string corresponding to the given topology
61 *
62 * @param topology the topology
63 * @return the string (freshly allocated) of given topology; NULL if topology cannot be
64 * expressed as a string
65 */
66char *
67GNUNET_TESTBED_topology_to_str_ (enum GNUNET_TESTBED_TopologyOption topology);
68
69
70/**
71 * Functions of this type are called to process underlay link
72 *
73 * @param cls closure
74 * @param A offset of first peer
75 * @param B offset of second peer
76 * @param bandwidth the bandwidth of the link in bytes per second
77 * @param latency the latency of link in milliseconds
78 * @param loss the percentage of messages dropped on the link
79 * @return GNUNET_OK to continue processing; GNUNET_SYSERR to abort
80 */
81typedef int (*underlay_link_processor) (void *cls,
82 unsigned int A,
83 unsigned int B,
84 unsigned int bandwidth,
85 unsigned int latency,
86 unsigned int loss);
87
88
89/**
90 * Function to construct an underlay topology
91 *
92 * @param num_peers the number of peers for which the topology should be
93 * generated
94 * @param proc the underlay link processor callback. Will be called for each
95 * underlay link generated unless a previous call to this callback
96 * returned GNUNET_SYSERR. Cannot be NULL.
97 * @param cls closure for proc
98 * @param ... variable arguments denoting the topology and its parameters. They
99 * should start with the type of topology to generate followed by their
100 * options. These arguments should *always* end with
101 * GNUNET_TESTBED_TOPOLOGY_OPTION_END option
102 * @return GNUNET_OK if underlay link generation is successful; GNUNET_SYSERR
103 * upon error in generating the underlay or if any calls to the
104 * underlay link processor returned GNUNET_SYSERR
105 */
106int
107GNUNET_TESTBED_underlay_construct_ (int num_peers,
108 underlay_link_processor proc,
109 void *cls,
110 ...);
111
112#endif
113/* end of testbed_api_topology.h */