134 lines
4.6 KiB
Python
134 lines
4.6 KiB
Python
import logging
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import random
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from typing import TYPE_CHECKING, Set, Union
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from netaddr import IPNetwork
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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 random_mac():
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return ("{:02x}" * 6).format(*[random.randrange(256) for _ in range(6)])
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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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def __eq__(self, other: "Subnets") -> bool:
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return (self.ip4, self.ip6) == (other.ip4, other.ip6)
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def __hash__(self) -> int:
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return hash((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__(
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self,
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app: "Application",
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ip4: str = "10.0.0.0",
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ip4_mask: int = 24,
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ip6: str = "2001::",
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ip6_mask=64,
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) -> None:
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self.app = app
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self.ip4_mask = ip4_mask
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self.ip6_mask = ip6_mask
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self.ip4_subnets = IPNetwork(f"{ip4}/{ip4_mask}")
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self.ip6_subnets = IPNetwork(f"{ip6}/{ip6_mask}")
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self.current_subnets = None
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def next_subnets(self) -> Subnets:
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# define currently used subnets
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used_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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subnets = None
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if link.HasField("interface_one"):
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subnets = self.get_subnets(link.interface_one)
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if link.HasField("interface_two"):
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subnets = self.get_subnets(link.interface_two)
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if subnets:
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used_subnets.add(subnets)
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# find next available subnets
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subnets = Subnets(self.ip4_subnets, self.ip6_subnets)
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while subnets in used_subnets:
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subnets = subnets.next()
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return subnets
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def reset(self):
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self.current_subnets = None
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def get_ips(self, node_id: int) -> [str, str]:
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ip4 = self.current_subnets.ip4[node_id]
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ip6 = self.current_subnets.ip6[node_id]
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return str(ip4), str(ip6)
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@classmethod
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def get_subnets(cls, 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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return Subnets(ip4_subnet, ip6_subnet)
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def determine_subnets(
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self, canvas_src_node: "CanvasNode", canvas_dst_node: "CanvasNode"
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):
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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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) -> Union[IPNetwork, None]:
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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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