def build_rip(anm):
"""Build rip overlay"""
g_in = anm['input']
g_l3 = anm['layer3']
g_rip = anm.add_overlay("rip")
g_phy = anm['phy']
if not anm['phy'].data.enable_routing:
g_rip.log.info("Routing disabled, not configuring rip")
return
if not any(n.igp == "rip" for n in g_phy):
log.debug("No rip nodes")
return
rip_nodes = [n for n in g_l3 if n['phy'].igp == "rip"]
g_rip.add_nodes_from(rip_nodes)
g_rip.add_edges_from(g_l3.edges(), warn=False)
ank_utils.copy_int_attr_from(g_l3, g_rip, "multipoint")
ank_utils.copy_attr_from(
g_in, g_rip, "custom_config_rip", dst_attr="custom_config")
g_rip.remove_edges_from(
[link for link in g_rip.edges() if link.src.asn != link.dst.asn])
for node in g_rip:
node.process_id = node.asn
for link in g_rip.edges():
link.metric = 1 # default
for edge in g_rip.edges():
for interface in edge.interfaces():
interface.metric = edge.metric
interface.multipoint = edge.multipoint
def build_ebgp(anm):
g_l3 = anm['layer3']
g_ebgp = anm.add_overlay("ebgp", directed=True)
g_ebgp.add_nodes_from(g_l3.routers())
ank_utils.copy_int_attr_from(g_l3, g_ebgp, "multipoint")
ebgp_edges = [e for e in g_l3.edges() if e.src.asn != e.dst.asn]
g_ebgp.add_edges_from(ebgp_edges, bidirectional=True, type='ebgp')
def build_ebgp(anm):
g_l3 = anm['layer3']
g_ebgp = anm.add_overlay("ebgp", directed=True)
g_ebgp.add_nodes_from(g_l3.routers())
ank_utils.copy_int_attr_from(g_l3, g_ebgp, "multipoint")
ebgp_edges = [e for e in g_l3.edges() if e.src.asn != e.dst.asn]
g_ebgp.add_edges_from(ebgp_edges, bidirectional=True, type='ebgp')
def build_bgp(anm):
"""Build iBGP end eBGP overlays"""
# eBGP
g_in = anm['input']
g_l3 = anm['layer3']
if not anm['phy'].data.enable_routing:
log.info("Routing disabled, not configuring BGP")
return
build_ebgp(anm)
build_ebgp_v4(anm)
build_ebgp_v6(anm)
"""TODO: remove from here once compiler updated"""
g_bgp = anm.add_overlay("bgp", directed=True)
g_bgp.add_nodes_from(g_l3.routers())
edges_to_add = [e for e in g_l3.edges()
if e.src in g_bgp and e.dst in g_bgp]
g_bgp.add_edges_from(edges_to_add, bidirectional=True)
ank_utils.copy_int_attr_from(g_l3, g_bgp, "multipoint")
# remove ibgp links
"""TODO: remove up to here once compiler updated"""
ank_utils.copy_attr_from(
g_in, g_bgp, "custom_config_bgp", dst_attr="custom_config")
log.info("Building eBGP")
ebgp_nodes = [d for d in g_bgp if any(
edge.type == 'ebgp' for edge in d.edges())]
g_bgp.update(ebgp_nodes, ebgp=True)
for ebgp_edge in g_bgp.edges(type="ebgp"):
for interface in ebgp_edge.interfaces():
interface.ebgp = True
for edge in g_bgp.edges(type='ibgp'):
# TODO: need interface querying/selection. rather than hard-coded ids
# TODO: create a new port (once API allows) rarher than binding to
# loopback zero
edge.bind_interface(edge.src, 0)
# TODO: need to initialise interface zero to be a loopback rather than physical type
# TODO: wat is this for?
for node in g_bgp:
for interface in node.interfaces():
interface.multipoint = any(e.multipoint for e in interface.edges())
log.info("Building iBGP")
build_ibgp(anm)
build_ibgp_v4(anm)
build_ibgp_v6(anm)
def build_bgp(anm):
"""Build iBGP end eBGP overlays"""
# eBGP
g_in = anm['input']
g_l3 = anm['layer3']
if not anm['phy'].data.enable_routing:
log.info("Routing disabled, not configuring BGP")
return
build_ebgp(anm)
build_ebgp_v4(anm)
build_ebgp_v6(anm)
"""TODO: remove from here once compiler updated"""
g_bgp = anm.add_overlay("bgp", directed=True)
g_bgp.add_nodes_from(g_l3.routers())
edges_to_add = [e for e in g_l3.edges()
if e.src in g_bgp and e.dst in g_bgp]
g_bgp.add_edges_from(edges_to_add, bidirectional=True)
ank_utils.copy_int_attr_from(g_l3, g_bgp, "multipoint")
# remove ibgp links
"""TODO: remove up to here once compiler updated"""
ank_utils.copy_attr_from(
g_in, g_bgp, "custom_config_bgp", dst_attr="custom_config")
# log.info("Building eBGP")
ebgp_nodes = [d for d in g_bgp if any(
edge.type == 'ebgp' for edge in d.edges())]
g_bgp.update(ebgp_nodes, ebgp=True)
for ebgp_edge in g_bgp.edges(type="ebgp"):
for interface in ebgp_edge.interfaces():
interface.ebgp = True
for edge in g_bgp.edges(type='ibgp'):
# TODO: need interface querying/selection. rather than hard-coded ids
# TODO: create a new port (once API allows) rarher than binding to
# loopback zero
edge.bind_interface(edge.src, 0)
# TODO: need to initialise interface zero to be a loopback rather than physical type
# TODO: wat is this for?
for node in g_bgp:
for interface in node.interfaces():
interface.multipoint = any(e.multipoint for e in interface.edges())
# log.info("Building iBGP")
build_ibgp(anm)
build_ibgp_v4(anm)
build_ibgp_v6(anm)
def build_eigrp(anm):
"""Build eigrp overlay"""
g_in = anm['input']
# add regardless, so allows quick check of node in anm['isis'] in compilers
g_l3 = anm['layer3']
g_eigrp = anm.add_overlay("eigrp")
g_phy = anm['phy']
if not anm['phy'].data.enable_routing:
g_eigrp.log.info("Routing disabled, not configuring EIGRP")
return
if not any(n.igp == "eigrp" for n in g_phy):
log.debug("No EIGRP nodes")
return
eigrp_nodes = [n for n in g_l3 if n['phy'].igp == "eigrp"]
g_eigrp.add_nodes_from(eigrp_nodes)
g_eigrp.add_edges_from(g_l3.edges(), warn=False)
ank_utils.copy_int_attr_from(g_l3, g_eigrp, "multipoint")
ank_utils.copy_attr_from(g_in,
g_eigrp,
"custom_config_eigrp",
dst_attr="custom_config")
# Merge and explode switches
ank_utils.aggregate_nodes(g_eigrp, g_eigrp.switches())
exploded_edges = ank_utils.explode_nodes(g_eigrp, g_eigrp.switches())
for edge in exploded_edges:
edge.multipoint = True
g_eigrp.remove_edges_from(
[link for link in g_eigrp.edges() if link.src.asn != link.dst.asn])
for node in g_eigrp:
node.process_id = node.asn
for link in g_eigrp.edges():
link.metric = 1 # default
for edge in g_eigrp.edges():
for interface in edge.interfaces():
interface.metric = edge.metric
interface.multipoint = edge.multipoint
def build_eigrp(anm):
"""Build eigrp overlay"""
g_in = anm['input']
# add regardless, so allows quick check of node in anm['isis'] in compilers
g_l3 = anm['layer3']
g_eigrp = anm.add_overlay("eigrp")
g_phy = anm['phy']
if not anm['phy'].data.enable_routing:
g_eigrp.log.info("Routing disabled, not configuring EIGRP")
return
if not any(n.igp == "eigrp" for n in g_phy):
log.debug("No EIGRP nodes")
return
eigrp_nodes = [n for n in g_l3 if n['phy'].igp == "eigrp"]
g_eigrp.add_nodes_from(eigrp_nodes)
g_eigrp.add_edges_from(g_l3.edges(), warn=False)
ank_utils.copy_int_attr_from(g_l3, g_eigrp, "multipoint")
ank_utils.copy_attr_from(
g_in, g_eigrp, "custom_config_eigrp", dst_attr="custom_config")
# Merge and explode switches
ank_utils.aggregate_nodes(g_eigrp, g_eigrp.switches())
exploded_edges = ank_utils.explode_nodes(g_eigrp,
g_eigrp.switches())
for edge in exploded_edges:
edge.multipoint = True
g_eigrp.remove_edges_from(
[link for link in g_eigrp.edges() if link.src.asn != link.dst.asn])
for node in g_eigrp:
node.process_id = node.asn
for link in g_eigrp.edges():
link.metric = 1 # default
for edge in g_eigrp.edges():
for interface in edge.interfaces():
interface.metric = edge.metric
interface.multipoint = edge.multipoint
def build_isis(anm):
"""Build isis overlay"""
g_in = anm['input']
# add regardless, so allows quick check of node in anm['isis'] in compilers
g_l3 = anm['layer3']
g_phy = anm['phy']
g_isis = anm.add_overlay("isis")
if not anm['phy'].data.enable_routing:
g_isis.log.info("Routing disabled, not configuring ISIS")
return
if not any(n.igp == "isis" for n in g_phy):
g_isis.log.debug("No ISIS nodes")
return
isis_nodes = [n for n in g_l3 if n['phy'].igp == "isis"]
g_isis.add_nodes_from(isis_nodes)
g_isis.add_edges_from(g_l3.edges(), warn=False)
ank_utils.copy_int_attr_from(g_l3, g_isis, "multipoint")
ank_utils.copy_attr_from(g_in,
g_isis,
"custom_config_isis",
dst_attr="custom_config")
g_isis.remove_edges_from(
[link for link in g_isis.edges() if link.src.asn != link.dst.asn])
build_network_entity_title(anm)
for node in g_isis.routers():
node.process_id = node.asn
for link in g_isis.edges():
link.metric = 1 # default
for edge in g_isis.edges():
for interface in edge.interfaces():
interface.metric = edge.metric
interface.multipoint = edge.multipoint
def build_isis(anm):
"""Build isis overlay"""
g_in = anm['input']
# add regardless, so allows quick check of node in anm['isis'] in compilers
g_l3 = anm['layer3']
g_phy = anm['phy']
g_isis = anm.add_overlay("isis")
if not anm['phy'].data.enable_routing:
g_isis.log.info("Routing disabled, not configuring ISIS")
return
if not any(n.igp == "isis" for n in g_phy):
g_isis.log.debug("No ISIS nodes")
return
isis_nodes = [n for n in g_l3 if n['phy'].igp == "isis"]
g_isis.add_nodes_from(isis_nodes)
g_isis.add_edges_from(g_l3.edges(), warn=False)
ank_utils.copy_int_attr_from(g_l3, g_isis, "multipoint")
ank_utils.copy_attr_from(
g_in, g_isis, "custom_config_isis", dst_attr="custom_config")
g_isis.remove_edges_from(
[link for link in g_isis.edges() if link.src.asn != link.dst.asn])
build_network_entity_title(anm)
for node in g_isis.routers():
node.process_id = node.asn
for link in g_isis.edges():
link.metric = 1 # default
for edge in g_isis.edges():
for interface in edge.interfaces():
interface.metric = edge.metric
interface.multipoint = edge.multipoint
def build_isis(anm):
"""Build isis overlay"""
g_in = anm['input']
# add regardless, so allows quick check of node in anm['isis'] in compilers
g_l3 = anm['layer3']
g_isis = anm.add_overlay("isis")
if not anm['phy'].data.enable_routing:
g_isis.log.info("Routing disabled, not configuring ISIS")
return
if not any(n.igp == "isis" for n in g_in):
g_isis.log.debug("No ISIS nodes")
return
g_isis.add_nodes_from(g_l3)
g_isis.add_edges_from(g_l3.edges())
ank_utils.copy_int_attr_from(g_l3, g_isis, "multipoint")
g_ipv4 = anm['ipv4']
ank_utils.copy_attr_from(g_in, g_isis, "custom_config_isis", dst_attr="custom_config")
g_isis.remove_edges_from(
[link for link in g_isis.edges() if link.src.asn != link.dst.asn])
for node in g_isis.routers():
ip_node = g_ipv4.node(node)
node.net = ip_to_net_ent_title_ios(ip_node.loopback)
node.process_id = node.asn
for link in g_isis.edges():
link.metric = 1 # default
for edge in g_isis.edges():
for interface in edge.interfaces():
interface.metric = edge.metric
interface.multipoint = edge.multipoint
def build_ospf(anm):
"""
Build OSPF graph.
Allowable area combinations:
0 -> 0
0 -> x (x!= 0)
x -> 0 (x!= 0)
x -> x (x != 0)
Not-allowed:
x -> x (x != y != 0)
"""
import netaddr
g_in = anm['input']
g_l3 = anm['layer3']
g_phy = anm['phy']
# add regardless, so allows quick check of node in anm['ospf'] in compilers
g_ospf = anm.add_overlay("ospf")
if not anm['phy'].data.enable_routing:
g_ospf.log.info("Routing disabled, not configuring OSPF")
return
if not any(n.igp == "ospf" for n in g_phy):
g_ospf.log.debug("No OSPF nodes")
return
ospf_nodes = [n for n in g_l3 if n['phy'].igp == "ospf"]
g_ospf.add_nodes_from(ospf_nodes)
g_ospf.add_edges_from(g_l3.edges(), warn=False)
ank_utils.copy_int_attr_from(g_l3, g_ospf, "multipoint")
# TODO: work out why this doesnt work
#ank_utils.copy_int_attr_from(g_in, g_ospf, "ospf_cost", dst_attr="cost", type=int, default = 1)
for node in g_ospf:
for interface in node.physical_interfaces():
interface.cost = 1
ank_utils.copy_attr_from(g_in, g_ospf, "ospf_area", dst_attr="area")
#ank_utils.copy_edge_attr_from(g_in, g_ospf, "ospf_cost", dst_attr="cost", type=int, default = 1)
ank_utils.copy_attr_from(
g_in, g_ospf, "custom_config_ospf", dst_attr="custom_config")
g_ospf.remove_edges_from([link for link in g_ospf.edges(
) if link.src.asn != link.dst.asn]) # remove inter-AS links
area_zero_ip = netaddr.IPAddress("0.0.0.0")
area_zero_int = 0
area_zero_ids = {area_zero_ip, area_zero_int}
default_area = area_zero_int
if any(router.area == "0.0.0.0" for router in g_ospf):
# string comparison as hasn't yet been cast to IPAddress
default_area = area_zero_ip
for router in g_ospf:
if not router.area or router.area == "None":
router.area = default_area
# check if 0.0.0.0 used anywhere, if so then use 0.0.0.0 as format
else:
try:
router.area = int(router.area)
except ValueError:
try:
router.area = netaddr.IPAddress(router.area)
except netaddr.core.AddrFormatError:
router.log.warning("Invalid OSPF area %s. Using default"
" of %s" % (router.area, default_area))
router.area = default_area
# TODO: use interfaces throughout, rather than edges
for router in g_ospf:
# and set area on interface
for edge in router.edges():
if edge.area:
continue # allocated (from other "direction", as undirected)
if router.area == edge.dst.area:
edge.area = router.area # intra-area
continue
if router.area in area_zero_ids or edge.dst.area in area_zero_ids:
# backbone to other area
if router.area in area_zero_ids:
# router in backbone, use other area
edge.area = edge.dst.area
else:
# router not in backbone, use its area
edge.area = router.area
for router in g_ospf:
areas = {edge.area for edge in router.edges()}
router.areas = list(areas) # edges router participates in
if len(areas) in area_zero_ids:
router.type = "backbone" # no ospf edges (eg single node in AS)
elif len(areas) == 1:
# single area: either backbone (all 0) or internal (all nonzero)
if len(areas & area_zero_ids):
# intersection has at least one element -> router has area zero
router.type = "backbone"
else:
router.type = "internal"
else:
# multiple areas
if len(areas & area_zero_ids):
# intersection has at least one element -> router has area zero
router.type = "backbone ABR"
elif router.area in area_zero_ids:
router.log.debug(
"Router belongs to area %s but has no area zero interfaces",
router.area)
router.type = "backbone ABR"
else:
router.log.warning(
"spans multiple areas but is not a member of area 0")
router.type = "INVALID"
if (any(area_zero_int in router.areas for router in g_ospf) and
any(area_zero_ip in router.areas for router in g_ospf)):
router.log.warning("Using both area 0 and area 0.0.0.0")
for link in g_ospf.edges():
if not link.cost:
link.cost = 1
# map areas and costs onto interfaces
# TODO: later map them directly rather than with edges - part of
# the transition
for edge in g_ospf.edges():
for interface in edge.interfaces():
interface.cost = edge.cost
interface.area = edge.area
interface.multipoint = edge.multipoint
for router in g_ospf:
router.loopback_zero.area = router.area
router.loopback_zero.cost = 0
router.process_id = router.asn
