import logging
from typing import TYPE_CHECKING, Any, Dict, List, Optional, Set, Tuple
import netaddr
from netaddr import EUI, IPNetwork
from core.api.grpc.wrappers import Interface, Link, LinkType, Node
from core.gui import nodeutils as nutils
from core.gui.graph.edges import CanvasEdge
from core.gui.graph.node import CanvasNode
logger = logging.getLogger(__name__)
if TYPE_CHECKING:
from core.gui.app import Application
IP4_MASK: int = 24
IP6_MASK: int = 64
WIRELESS_IP4_MASK: int = 32
WIRELESS_IP6_MASK: int = 128
def get_index(iface: Interface) -> Optional[int]:
if not iface.ip4:
return None
net = netaddr.IPNetwork(f"{iface.ip4}/{iface.ip4_mask}")
ip_value = net.value
cidr_value = net.cidr.value
return ip_value - cidr_value
class Subnets:
def __init__(self, ip4: IPNetwork, ip6: IPNetwork) -> None:
self.ip4 = ip4
self.ip6 = ip6
self.used_indexes = set()
def __eq__(self, other: Any) -> bool:
if not isinstance(other, Subnets):
return False
return self.key() == other.key()
def __hash__(self) -> int:
return hash(self.key())
def key(self) -> Tuple[IPNetwork, IPNetwork]:
return self.ip4, self.ip6
def next(self) -> "Subnets":
return Subnets(self.ip4.next(), self.ip6.next())
class InterfaceManager:
def __init__(self, app: "Application") -> None:
self.app: "Application" = app
ip4 = self.app.guiconfig.ips.ip4
ip6 = self.app.guiconfig.ips.ip6
self.ip4_subnets: IPNetwork = IPNetwork(f"{ip4}/{IP4_MASK}")
self.ip6_subnets: IPNetwork = IPNetwork(f"{ip6}/{IP6_MASK}")
mac = self.app.guiconfig.mac
self.mac: EUI = EUI(mac, dialect=netaddr.mac_unix_expanded)
self.current_mac: Optional[EUI] = None
self.current_subnets: Optional[Subnets] = None
self.used_subnets: Dict[Tuple[IPNetwork, IPNetwork], Subnets] = {}
self.used_macs: Set[str] = set()
def update_ips(self, ip4: str, ip6: str) -> None:
self.reset()
self.ip4_subnets = IPNetwork(f"{ip4}/{IP4_MASK}")
self.ip6_subnets = IPNetwork(f"{ip6}/{IP6_MASK}")
def next_mac(self) -> str:
while str(self.current_mac) in self.used_macs:
value = self.current_mac.value + 1
self.current_mac = EUI(value, dialect=netaddr.mac_unix_expanded)
mac = str(self.current_mac)
value = self.current_mac.value + 1
self.current_mac = EUI(value, dialect=netaddr.mac_unix_expanded)
return mac
def next_subnets(self) -> Subnets:
subnets = self.current_subnets
if subnets is None:
subnets = Subnets(self.ip4_subnets, self.ip6_subnets)
while subnets.key() in self.used_subnets:
subnets = subnets.next()
self.used_subnets[subnets.key()] = subnets
return subnets
def reset(self) -> None:
self.current_subnets = None
self.used_subnets.clear()
def removed(self, links: List[Link]) -> None:
# get remaining subnets
remaining_subnets = set()
for edge in self.app.core.links.values():
link = edge.link
if link.iface1:
subnets = self.get_subnets(link.iface1)
remaining_subnets.add(subnets)
if link.iface2:
subnets = self.get_subnets(link.iface2)
remaining_subnets.add(subnets)
# remove all subnets from used subnets when no longer present
# or remove used indexes from subnet
ifaces = []
for link in links:
if link.iface1:
ifaces.append(link.iface1)
if link.iface2:
ifaces.append(link.iface2)
for iface in ifaces:
subnets = self.get_subnets(iface)
if subnets not in remaining_subnets:
self.used_subnets.pop(subnets.key(), None)
else:
index = get_index(iface)
if index is not None:
subnets.used_indexes.discard(index)
self.current_subnets = None
def set_macs(self, links: List[Link]) -> None:
self.current_mac = self.mac
self.used_macs.clear()
for link in links:
if link.iface1:
self.used_macs.add(link.iface1.mac)
if link.iface2:
self.used_macs.add(link.iface2.mac)
def joined(self, links: List[Link]) -> None:
ifaces = []
for link in links:
if link.iface1:
ifaces.append(link.iface1)
if link.iface2:
ifaces.append(link.iface2)
# add to used subnets and mark used indexes
for iface in ifaces:
subnets = self.get_subnets(iface)
index = get_index(iface)
if index is None:
continue
subnets.used_indexes.add(index)
if subnets.key() not in self.used_subnets:
self.used_subnets[subnets.key()] = subnets
def next_index(self, node: Node) -> int:
if nutils.is_router(node):
index = 1
else:
index = 20
while True:
if index not in self.current_subnets.used_indexes:
self.current_subnets.used_indexes.add(index)
break
index += 1
return index
def get_ips(self, node: Node) -> [str, str]:
index = self.next_index(node)
ip4 = self.current_subnets.ip4[index]
ip6 = self.current_subnets.ip6[index]
return str(ip4), str(ip6)
def get_subnets(self, iface: Interface) -> Subnets:
ip4_subnet = self.ip4_subnets
if iface.ip4:
ip4_subnet = IPNetwork(f"{iface.ip4}/{IP4_MASK}").cidr
ip6_subnet = self.ip6_subnets
if iface.ip6:
ip6_subnet = IPNetwork(f"{iface.ip6}/{IP6_MASK}").cidr
subnets = Subnets(ip4_subnet, ip6_subnet)
return self.used_subnets.get(subnets.key(), subnets)
def determine_subnets(
self, canvas_src_node: CanvasNode, canvas_dst_node: CanvasNode
) -> None:
src_node = canvas_src_node.core_node
dst_node = canvas_dst_node.core_node
is_src_container = nutils.is_container(src_node)
is_dst_container = nutils.is_container(dst_node)
if is_src_container and is_dst_container:
self.current_subnets = self.next_subnets()
elif is_src_container and not is_dst_container:
subnets = self.find_subnets(canvas_dst_node, visited={src_node.id})
if subnets:
self.current_subnets = subnets
else:
self.current_subnets = self.next_subnets()
elif not is_src_container and is_dst_container:
subnets = self.find_subnets(canvas_src_node, visited={dst_node.id})
if subnets:
self.current_subnets = subnets
else:
self.current_subnets = self.next_subnets()
else:
logger.info("ignoring subnet change for link between network nodes")
def find_subnets(
self, canvas_node: CanvasNode, visited: Set[int] = None
) -> Optional[IPNetwork]:
logger.info("finding subnet for node: %s", canvas_node.core_node.name)
subnets = None
if not visited:
visited = set()
visited.add(canvas_node.core_node.id)
for edge in canvas_node.edges:
iface = edge.link.iface1
check_node = edge.src
if edge.src == canvas_node:
iface = edge.link.iface2
check_node = edge.dst
if check_node.core_node.id in visited:
continue
visited.add(check_node.core_node.id)
if iface:
subnets = self.get_subnets(iface)
else:
subnets = self.find_subnets(check_node, visited)
if subnets:
logger.info("found subnets: %s", subnets)
break
return subnets
def create_link(self, edge: CanvasEdge) -> Link:
"""
Create core link for a given edge based on src/dst nodes.
"""
src_node = edge.src.core_node
dst_node = edge.dst.core_node
self.determine_subnets(edge.src, edge.dst)
src_iface = None
if nutils.is_container(src_node):
src_iface = self.create_iface(edge.src, edge.linked_wireless)
dst_iface = None
if nutils.is_container(dst_node):
dst_iface = self.create_iface(edge.dst, edge.linked_wireless)
link = Link(
type=LinkType.WIRED,
node1_id=src_node.id,
node2_id=dst_node.id,
iface1=src_iface,
iface2=dst_iface,
)
logger.info("added link between %s and %s", src_node.name, dst_node.name)
return link
def create_iface(self, canvas_node: CanvasNode, wireless_link: bool) -> Interface:
node = canvas_node.core_node
ip4, ip6 = self.get_ips(node)
if wireless_link:
ip4_mask = WIRELESS_IP4_MASK
ip6_mask = WIRELESS_IP6_MASK
else:
ip4_mask = IP4_MASK
ip6_mask = IP6_MASK
iface_id = canvas_node.next_iface_id()
name = f"eth{iface_id}"
iface = Interface(
id=iface_id,
name=name,
ip4=ip4,
ip4_mask=ip4_mask,
ip6=ip6,
ip6_mask=ip6_mask,
)
logger.info("create node(%s) interface(%s)", node.name, iface)
return iface