def install_branch_aware_flows(sh, dhs):
global switch_usage
count = 0
branch_node = {}
degree = {}
installed = {}
branch_node_sw = {}
src = hosts[sh]['switch']
for dh in dhs:
branch_node[dh] = None
for sw in switches.keys():
branch_node_sw[sw] = 0
for dh in dhs:
dst = hosts[dh]['switch']
cur = dst
pre = cur
first = 1
while cur is not None:
if (len(switch_usage[cur]) > 1):
if (first is not 1):
port = switches[cur][pre]["port"]
branch_node[dh] = cur, port
break
elif (first is 1):
break
elif (len(switch_usage[cur]) == 1):
pre = cur
cur = sp[src][cur]
first = 0
for dh in dhs:
if branch_node[dh] is not None:
branch_node_sw[branch_node[dh][0]] = 1
for h in ports:
for sw in ports[h]:
degree[sw] = len(ports[h][sw]) + 1
installed[sw] = 0
for h in ports: # for each high-capacity source host
for sw in ports[h]: # for each switch in the tree
if (len(switch_usage[sw]) > 1):
# group entry
newgid = get_next_gid(sw)
g = GroupEntry(dpids[sw]["id"], newgid, "ALL")
i = 0
for p in ports[h][sw]: # for each switch port in the tree
g.addBucket()
g.addAction(i, "OUTPUT", port=p)
i += 1
g.install()
count += 1
dpids[sw]["capacity"] = dpids[sw]["capacity"] - 1
# flow entry (also match on in_port for reverse path check)
f = FlowEntry(dpids[sw]["id"])
f.addMatch("in_port", reverse_path_port(hosts[h], sw))
f.addMatch("dl_type", 0x800)
f.addMatch("nw_src", hosts[h]['ip'])
f.addMatch("nw_dst", MCAST_ADDR)
f.addAction("GROUP", group_id=newgid)
f.install()
count += 1
dpids[sw]["capacity"] = dpids[sw]["capacity"] - 1
for h in ports:
for dh in dhs:
if branch_node[dh] is not None:
sw, p = branch_node[dh]
if sw is not None:
f = FlowEntry(dpids[sw]["id"])
f.addMatch("in_port", reverse_path_port(hosts[h], sw))
f.addMatch("dl_type", 0x800)
f.addMatch("nw_dst", MCAST_ADDR)
f.addAction("SET_FIELD",
field="ipv4_dst",
value=hosts[dh]['ip'])
f.addAction("OUTPUT", port=p)
f.install()
count += 1
dpids[sw]["capacity"] = dpids[sw]["capacity"] - 1
for h in ports:
i = 0
for sw in ports[h]:
if (len(switch_usage[sw]) == 1):
f = FlowEntry(dpids[sw]["id"])
f.addMatch("in_port", reverse_path_port(hosts[h], sw))
f.addMatch("dl_type", 0x800)
f.addMatch("nw_src", hosts[h]['ip'])
f.addMatch("nw_dst", hosts[switch_usage[sw][0]]['ip'])
for p in ports[h][sw]:
f.addAction("OUTPUT", port=p)
f.install()
i += 1
increment_mcast_addr()
return count
def install_lq_flows():
for t in ports_lq: # for each transcoder as source
for sw in ports_lq[t]: # for each switch in the tree
# group entry
newgid = get_next_gid(sw)
g = GroupEntry(dpids[sw]["id"], newgid, "ALL")
i = 0
for p in ports_lq[t][sw]: # for each switch port in the tree
g.addBucket()
g.addAction(i, "OUTPUT", port=p)
i += 1
g.install()
# flow entry (also match on in_port for reverse path check)
# do not install on transcoder switch, tos is not set by T
if not sw == tees[t]['switch']:
f = FlowEntry(dpids[sw]["id"])
f.addMatch("in_port", reverse_path_port(tees[t], sw))
f.addMatch("dl_type", 0x800)
f.addMatch("ip_dscp", DSCP_VALUE)
f.addMatch("nw_src", tees[t]['ip'])
f.addMatch("nw_dst", MCAST_ADDR)
f.addAction("GROUP", group_id=newgid)
f.install()
# set ip dscp when coming from T
# the last group added to T's switch refers to the low-capacity tree
tsw = tees[t]['switch']
lastgid = gid[tsw] - 1
# flow entry (match on in_port, not nw_src, because original IP address
# should be kept)
f = FlowEntry(dpids[tsw]["id"])
f.addMatch("in_port", tees[t]['port'])
f.addMatch("dl_type", 0x800)
f.addMatch("nw_dst", MCAST_ADDR)
f.addAction("SET_FIELD", field="ip_dscp", value=DSCP_VALUE)
f.addAction("GROUP", group_id=lastgid)
f.install()
def install_simple_flows():
count = 0
for h in ports: # for each high-capacity source host
for sw in ports[h]: # for each switch in the tree
# group entry
newgid = get_next_gid(sw)
g = GroupEntry(dpids[sw]["id"], newgid, "ALL")
i = 0
for p in ports[h][sw]: # for each switch port in the tree
g.addBucket()
g.addAction(i, "OUTPUT", port=p)
i += 1
g.install()
count += 1
# flow entry (also match on in_port for reverse path check)
f = FlowEntry(dpids[sw]["id"])
f.addMatch("in_port", reverse_path_port(hosts[h], sw))
f.addMatch("dl_type", 0x800)
f.addMatch("nw_src", hosts[h]['ip'])
f.addMatch("nw_dst", MCAST_ADDR)
f.addAction("GROUP", group_id=newgid)
f.install()
count += 1
increment_mcast_addr()
return count