97f31560ca
* Copying P4D2 Fall 2017 into P4D2 2018 East. * Updated P4D2_2018_East VM. Added vagrant URL workaround, cdrom to VM. Updated to latest commits of BMV2, p4c, PI. Known issue with p4runtime exercise. * Applied patch from @antoninbas in and updated solution
71 lines
3.0 KiB
Python
71 lines
3.0 KiB
Python
from mininet.topo import Topo
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class AppTopo(Topo):
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def __init__(self, links, latencies={}, manifest=None, target=None,
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log_dir="/tmp", bws={}, **opts):
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Topo.__init__(self, **opts)
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nodes = sum(map(list, zip(*links)), [])
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host_names = sorted(list(set(filter(lambda n: n[0] == 'h', nodes))))
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sw_names = sorted(list(set(filter(lambda n: n[0] == 's', nodes))))
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sw_ports = dict([(sw, []) for sw in sw_names])
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self._host_links = {}
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self._sw_links = dict([(sw, {}) for sw in sw_names])
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for sw_name in sw_names:
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self.addSwitch(sw_name, log_file="%s/%s.log" %(log_dir, sw_name))
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for host_name in host_names:
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host_num = int(host_name[1:])
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self.addHost(host_name)
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self._host_links[host_name] = {}
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host_links = filter(lambda l: l[0]==host_name or l[1]==host_name, links)
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sw_idx = 0
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for link in host_links:
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sw = link[0] if link[0] != host_name else link[1]
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sw_num = int(sw[1:])
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assert sw[0]=='s', "Hosts should be connected to switches, not " + str(sw)
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host_ip = "10.0.%d.%d" % (sw_num, host_num)
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host_mac = '00:00:00:00:%02x:%02x' % (sw_num, host_num)
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delay_key = ''.join([host_name, sw])
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delay = latencies[delay_key] if delay_key in latencies else '0ms'
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bw = bws[delay_key] if delay_key in bws else None
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sw_ports[sw].append(host_name)
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self._host_links[host_name][sw] = dict(
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idx=sw_idx,
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host_mac = host_mac,
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host_ip = host_ip,
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sw = sw,
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sw_mac = "00:00:00:00:%02x:%02x" % (sw_num, host_num),
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sw_ip = "10.0.%d.%d" % (sw_num, 254),
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sw_port = sw_ports[sw].index(host_name)+1
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)
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self.addLink(host_name, sw, delay=delay, bw=bw,
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addr1=host_mac, addr2=self._host_links[host_name][sw]['sw_mac'])
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sw_idx += 1
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for link in links: # only check switch-switch links
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sw1, sw2 = link
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if sw1[0] != 's' or sw2[0] != 's': continue
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delay_key = ''.join(sorted([sw1, sw2]))
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delay = latencies[delay_key] if delay_key in latencies else '0ms'
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bw = bws[delay_key] if delay_key in bws else None
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self.addLink(sw1, sw2, delay=delay, bw=bw)#, max_queue_size=10)
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sw_ports[sw1].append(sw2)
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sw_ports[sw2].append(sw1)
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sw1_num, sw2_num = int(sw1[1:]), int(sw2[1:])
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sw1_port = dict(mac="00:00:00:%02x:%02x:00" % (sw1_num, sw2_num), port=sw_ports[sw1].index(sw2)+1)
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sw2_port = dict(mac="00:00:00:%02x:%02x:00" % (sw2_num, sw1_num), port=sw_ports[sw2].index(sw1)+1)
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self._sw_links[sw1][sw2] = [sw1_port, sw2_port]
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self._sw_links[sw2][sw1] = [sw2_port, sw1_port]
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