import logging from typing import TYPE_CHECKING, Any, List, Optional, Set, Tuple import netaddr from netaddr import EUI, IPNetwork from core.gui.nodeutils import NodeUtils if TYPE_CHECKING: from core.gui.app import Application from core.api.grpc import core_pb2 from core.gui.graph.node import CanvasNode def get_index(interface: "core_pb2.Interface") -> Optional[int]: if not interface.ip4: return None net = netaddr.IPNetwork(f"{interface.ip4}/{interface.ip4mask}") 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 = app ip4 = self.app.guiconfig.ips.ip4 ip6 = self.app.guiconfig.ips.ip6 self.ip4_mask = 24 self.ip6_mask = 64 self.ip4_subnets = IPNetwork(f"{ip4}/{self.ip4_mask}") self.ip6_subnets = IPNetwork(f"{ip6}/{self.ip6_mask}") mac = self.app.guiconfig.mac self.mac = EUI(mac, dialect=netaddr.mac_unix_expanded) self.current_mac = None self.current_subnets = None self.used_subnets = {} def update_ips(self, ip4: str, ip6: str) -> None: self.reset() self.ip4_subnets = IPNetwork(f"{ip4}/{self.ip4_mask}") self.ip6_subnets = IPNetwork(f"{ip6}/{self.ip6_mask}") def reset_mac(self) -> None: self.current_mac = self.mac def next_mac(self) -> str: 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["core_pb2.Link"]) -> None: # get remaining subnets remaining_subnets = set() for edge in self.app.core.links.values(): link = edge.link if link.HasField("interface1"): subnets = self.get_subnets(link.interface1) remaining_subnets.add(subnets) if link.HasField("interface2"): subnets = self.get_subnets(link.interface2) remaining_subnets.add(subnets) # remove all subnets from used subnets when no longer present # or remove used indexes from subnet interfaces = [] for link in links: if link.HasField("interface1"): interfaces.append(link.interface1) if link.HasField("interface2"): interfaces.append(link.interface2) for interface in interfaces: subnets = self.get_subnets(interface) if subnets not in remaining_subnets: self.used_subnets.pop(subnets.key(), None) else: index = get_index(interface) if index is not None: subnets.used_indexes.discard(index) self.current_subnets = None def joined(self, links: List["core_pb2.Link"]) -> None: interfaces = [] for link in links: if link.HasField("interface1"): interfaces.append(link.interface1) if link.HasField("interface2"): interfaces.append(link.interface2) # add to used subnets and mark used indexes for interface in interfaces: subnets = self.get_subnets(interface) index = get_index(interface) 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: "core_pb2.Node") -> int: if NodeUtils.is_router_node(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: "core_pb2.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, interface: "core_pb2.Interface") -> Subnets: ip4_subnet = self.ip4_subnets if interface.ip4: ip4_subnet = IPNetwork(f"{interface.ip4}/{interface.ip4mask}").cidr ip6_subnet = self.ip6_subnets if interface.ip6: ip6_subnet = IPNetwork(f"{interface.ip6}/{interface.ip6mask}").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 = NodeUtils.is_container_node(src_node.type) is_dst_container = NodeUtils.is_container_node(dst_node.type) 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: logging.info("ignoring subnet change for link between network nodes") def find_subnets( self, canvas_node: "CanvasNode", visited: Set[int] = None ) -> Optional[IPNetwork]: logging.info("finding subnet for node: %s", canvas_node.core_node.name) canvas = self.app.canvas subnets = None if not visited: visited = set() visited.add(canvas_node.core_node.id) for edge in canvas_node.edges: src_node = canvas.nodes[edge.src] dst_node = canvas.nodes[edge.dst] interface = edge.src_interface check_node = src_node if src_node == canvas_node: interface = edge.dst_interface check_node = dst_node if check_node.core_node.id in visited: continue visited.add(check_node.core_node.id) if interface: subnets = self.get_subnets(interface) else: subnets = self.find_subnets(check_node, visited) if subnets: logging.info("found subnets: %s", subnets) break return subnets