208 lines
7.6 KiB
Python
208 lines
7.6 KiB
Python
import logging
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from typing import TYPE_CHECKING, Any, List, Optional, Set, Tuple
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import netaddr
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from netaddr import EUI, IPNetwork
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from core.gui import appconfig
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from core.gui.nodeutils import NodeUtils
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if TYPE_CHECKING:
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from core.gui.app import Application
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from core.api.grpc import core_pb2
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from core.gui.graph.node import CanvasNode
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def get_index(interface: "core_pb2.Interface") -> int:
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net = netaddr.IPNetwork(f"{interface.ip4}/{interface.ip4mask}")
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ip_value = net.value
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cidr_value = net.cidr.value
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return ip_value - cidr_value
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class Subnets:
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def __init__(self, ip4: IPNetwork, ip6: IPNetwork) -> None:
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self.ip4 = ip4
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self.ip6 = ip6
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self.used_indexes = set()
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def __eq__(self, other: Any) -> bool:
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if not isinstance(other, Subnets):
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return False
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return self.key() == other.key()
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def __hash__(self) -> int:
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return hash(self.key())
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def key(self) -> Tuple[IPNetwork, IPNetwork]:
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return self.ip4, self.ip6
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def next(self) -> "Subnets":
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return Subnets(self.ip4.next(), self.ip6.next())
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class InterfaceManager:
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def __init__(self, app: "Application") -> None:
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self.app = app
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ip_config = self.app.guiconfig.get("ips", {})
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ip4 = ip_config.get("ip4", appconfig.DEFAULT_IP4)
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ip6 = ip_config.get("ip6", appconfig.DEFAULT_IP6)
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self.ip4_mask = 24
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self.ip6_mask = 64
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self.ip4_subnets = IPNetwork(f"{ip4}/{self.ip4_mask}")
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self.ip6_subnets = IPNetwork(f"{ip6}/{self.ip6_mask}")
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mac = self.app.guiconfig.get("mac", appconfig.DEFAULT_MAC)
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self.mac = EUI(mac, dialect=netaddr.mac_unix_expanded)
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self.current_mac = None
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self.current_subnets = None
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self.used_subnets = {}
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def update_ips(self, ip4: str, ip6: str) -> None:
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self.reset()
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self.ip4_subnets = IPNetwork(f"{ip4}/{self.ip4_mask}")
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self.ip6_subnets = IPNetwork(f"{ip6}/{self.ip6_mask}")
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def reset_mac(self) -> None:
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self.current_mac = self.mac
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def next_mac(self) -> str:
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mac = str(self.current_mac)
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value = self.current_mac.value + 1
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self.current_mac = EUI(value, dialect=netaddr.mac_unix_expanded)
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return mac
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def next_subnets(self) -> Subnets:
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subnets = self.current_subnets
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if subnets is None:
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subnets = Subnets(self.ip4_subnets, self.ip6_subnets)
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while subnets.key() in self.used_subnets:
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subnets = subnets.next()
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self.used_subnets[subnets.key()] = subnets
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return subnets
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def reset(self) -> None:
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self.current_subnets = None
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self.used_subnets.clear()
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def removed(self, links: List["core_pb2.Link"]) -> None:
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# get remaining subnets
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remaining_subnets = set()
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for edge in self.app.core.links.values():
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link = edge.link
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if link.HasField("interface_one"):
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subnets = self.get_subnets(link.interface_one)
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remaining_subnets.add(subnets)
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if link.HasField("interface_two"):
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subnets = self.get_subnets(link.interface_two)
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remaining_subnets.add(subnets)
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# remove all subnets from used subnets when no longer present
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# or remove used indexes from subnet
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interfaces = []
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for link in links:
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if link.HasField("interface_one"):
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interfaces.append(link.interface_one)
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if link.HasField("interface_two"):
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interfaces.append(link.interface_two)
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for interface in interfaces:
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subnets = self.get_subnets(interface)
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if subnets not in remaining_subnets:
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if self.current_subnets == subnets:
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self.current_subnets = None
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self.used_subnets.pop(subnets.key(), None)
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else:
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index = get_index(interface)
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subnets.used_indexes.discard(index)
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def joined(self, links: List["core_pb2.Link"]) -> None:
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interfaces = []
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for link in links:
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if link.HasField("interface_one"):
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interfaces.append(link.interface_one)
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if link.HasField("interface_two"):
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interfaces.append(link.interface_two)
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# add to used subnets and mark used indexes
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for interface in interfaces:
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subnets = self.get_subnets(interface)
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index = get_index(interface)
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subnets.used_indexes.add(index)
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if subnets.key() not in self.used_subnets:
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self.used_subnets[subnets.key()] = subnets
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def next_index(self, node: "core_pb2.Node") -> int:
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if NodeUtils.is_router_node(node):
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index = 1
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else:
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index = 20
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while True:
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if index not in self.current_subnets.used_indexes:
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self.current_subnets.used_indexes.add(index)
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break
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index += 1
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return index
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def get_ips(self, node: "core_pb2.Node") -> [str, str]:
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index = self.next_index(node)
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ip4 = self.current_subnets.ip4[index]
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ip6 = self.current_subnets.ip6[index]
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return str(ip4), str(ip6)
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def get_subnets(self, interface: "core_pb2.Interface") -> Subnets:
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ip4_subnet = IPNetwork(f"{interface.ip4}/{interface.ip4mask}").cidr
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ip6_subnet = IPNetwork(f"{interface.ip6}/{interface.ip6mask}").cidr
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subnets = Subnets(ip4_subnet, ip6_subnet)
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return self.used_subnets.get(subnets.key(), subnets)
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def determine_subnets(
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self, canvas_src_node: "CanvasNode", canvas_dst_node: "CanvasNode"
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) -> None:
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src_node = canvas_src_node.core_node
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dst_node = canvas_dst_node.core_node
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is_src_container = NodeUtils.is_container_node(src_node.type)
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is_dst_container = NodeUtils.is_container_node(dst_node.type)
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if is_src_container and is_dst_container:
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self.current_subnets = self.next_subnets()
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elif is_src_container and not is_dst_container:
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subnets = self.find_subnets(canvas_dst_node, visited={src_node.id})
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if subnets:
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self.current_subnets = subnets
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else:
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self.current_subnets = self.next_subnets()
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elif not is_src_container and is_dst_container:
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subnets = self.find_subnets(canvas_src_node, visited={dst_node.id})
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if subnets:
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self.current_subnets = subnets
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else:
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self.current_subnets = self.next_subnets()
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else:
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logging.info("ignoring subnet change for link between network nodes")
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def find_subnets(
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self, canvas_node: "CanvasNode", visited: Set[int] = None
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) -> Optional[IPNetwork]:
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logging.info("finding subnet for node: %s", canvas_node.core_node.name)
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canvas = self.app.canvas
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subnets = None
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if not visited:
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visited = set()
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visited.add(canvas_node.core_node.id)
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for edge in canvas_node.edges:
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src_node = canvas.nodes[edge.src]
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dst_node = canvas.nodes[edge.dst]
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interface = edge.src_interface
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check_node = src_node
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if src_node == canvas_node:
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interface = edge.dst_interface
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check_node = dst_node
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if check_node.core_node.id in visited:
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continue
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visited.add(check_node.core_node.id)
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if interface:
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subnets = self.get_subnets(interface)
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else:
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subnets = self.find_subnets(check_node, visited)
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if subnets:
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logging.info("found subnets: %s", subnets)
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break
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return subnets
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