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/*
This file is part of GNUnet
Copyright (C) 2008--2013 GNUnet e.V.
GNUnet is free software: you can redistribute it and/or modify it
under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License,
or (at your option) any later version.
GNUnet is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Affero General Public License for more details.
*/
/**
* @file testbed/testbed_api_topology.h
* @brief header for intra library exported functions
* @author Sree Harsha Totakura <sreeharsha@totakura.in>
*/
#ifndef TESTBED_API_TOPOLOGY_H
#define TESTBED_API_TOPOLOGY_H
/**
* Returns the number of links that are required to generate a 2d torus for the
* given number of peers. Also returns the arrangment (number of rows and the
* length of each row)
*
* @param num_peers number of peers
* @param rows number of rows in the 2d torus. Can be NULL.
* @param rows_len the length of each row. This array will be allocated
* fresh. The caller should free it. Can be NULL.
*/
unsigned int
GNUNET_TESTBED_2dtorus_calc_links (unsigned int num_peers, unsigned int *rows,
unsigned int **rows_len);
/**
* Get a topology from a string input.
*
* @param topology where to write the retrieved topology
* @param topology_string The string to attempt to
* get a configuration value from
* @return GNUNET_YES if topology string matched a
* known topology, GNUNET_NO if not
*/
int
GNUNET_TESTBED_topology_get_ (enum GNUNET_TESTBED_TopologyOption *topology,
const char *topology_string);
/**
* Returns the string corresponding to the given topology
*
* @param topology the topology
* @return the string (freshly allocated) of given topology; NULL if topology cannot be
* expressed as a string
*/
char *
GNUNET_TESTBED_topology_to_str_ (enum GNUNET_TESTBED_TopologyOption topology);
/**
* Functions of this type are called to process underlay link
*
* @param cls closure
* @param A offset of first peer
* @param B offset of second peer
* @param bandwidth the bandwidth of the link in bytes per second
* @param latency the latency of link in milliseconds
* @param loss the percentage of messages dropped on the link
* @return GNUNET_OK to continue processing; GNUNET_SYSERR to abort
*/
typedef int (*underlay_link_processor) (void *cls,
unsigned int A,
unsigned int B,
unsigned int bandwidth,
unsigned int latency,
unsigned int loss);
/**
* Function to construct an underlay topology
*
* @param num_peers the number of peers for which the topology should be
* generated
* @param proc the underlay link processor callback. Will be called for each
* underlay link generated unless a previous call to this callback
* returned GNUNET_SYSERR. Cannot be NULL.
* @param cls closure for proc
* @param ... variable arguments denoting the topology and its parameters. They
* should start with the type of topology to generate followed by their
* options. These arguments should *always* end with
* GNUNET_TESTBED_TOPOLOGY_OPTION_END option
* @return GNUNET_OK if underlay link generation is successful; GNUNET_SYSERR
* upon error in generating the underlay or if any calls to the
* underlay link processor returned GNUNET_SYSERR
*/
int
GNUNET_TESTBED_underlay_construct_ (int num_peers,
underlay_link_processor proc,
void *cls,
...);
#endif
/* end of testbed_api_topology.h */
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