def test_buffer_sizes_bw_delay_prod_unused_links(self): topo = fnss.Topology() topo.add_edge(1, 2, weight=100) topo.add_edge(2, 3, weight=1) topo.add_edge(3, 1, weight=1) fnss.set_capacities_constant(topo, 10) fnss.set_delays_constant(topo, 2) fnss.set_buffer_sizes_bw_delay_prod(topo) self.assertTrue(all((topo.adj[u][v]['buffer'] is not None for (u, v) in topo.edges())))
def parse(topo_path, xml_path, delay, buffer_type): topology = fnss.parse_topology_zoo(topo_path) topology = topology.to_undirected() fnss.set_capacities_edge_betweenness(topology, [200, 500, 1000], 'Mbps') # TODO: hardcode now fnss.set_weights_constant(topology, 1) fnss.set_delays_constant(topology, delay, 'ms') if buffer_type == 'bdp': fnss.set_buffer_sizes_bw_delay_prod(topology, 'packet', 1500) elif buffer_type == 'bw': fnss.set_buffer_sizes_link_bandwidth(topology, buffer_unit='packet') else: fnss.set_buffer_sizes_constant(topology, 1500, 'packet') fnss.write_topology(topology, xml_path)
def test_buffer_sizes_bw_delay_prod(self): fnss.set_buffer_sizes_bw_delay_prod(self.topo) self.assertTrue( all(self.topo.edge[u][v]['buffer'] is not None for (u, v) in self.topo.edges_iter()))
======================= This example shows how to generate a topology (a line in this case) and export it to the ns-2 simulator """ import fnss # create a line topology with 10 nodes topology = fnss.line_topology(10) # assign capacity of 10 Mbps to each link fnss.set_capacities_constant(topology, 10, 'Mbps') # assign delay of 2 ms to each link fnss.set_delays_constant(topology, 2, 'ms') # set buffers in each node (use packets, bytes not supported by ns-2) fnss.set_buffer_sizes_bw_delay_prod(topology, 'packets', 1500) # Add FTP application to first and last node of the line tcp_stack_props = {'class': 'Agent/TCP', 'class_': 2, 'fid_': 1} fnss.add_stack(topology, 0, 'tcp', tcp_stack_props) fnss.add_stack(topology, 9, 'tcp', tcp_stack_props) ftp_app_props = {'class': 'Application/FTP', 'type': 'FTP'} fnss.add_application(topology, 0, 'ftp', ftp_app_props) fnss.add_application(topology, 9, 'ftp', ftp_app_props) # export topology to a Tcl script for ns-2 fnss.to_ns2(topology, 'ns2-script.tcl', stacks=True)
def test_buffer_sizes_bw_delay_prod(self): fnss.set_buffer_sizes_bw_delay_prod(self.topo) self.assertTrue(all(self.topo.adj[u][v]['buffer'] is not None for (u, v) in self.topo.edges()))