daemon: changes to support providing emane wireless links in all_link_data, which makes it accessible over grpc

daemon/core/emane/emanemanager.py

@@ -6,7 +6,7 @@ import logging
 import os
 import threading
 from collections import OrderedDict
-from typing import TYPE_CHECKING, Dict, List, Set, Tuple, Type
+from typing import TYPE_CHECKING, Dict, List, Optional, Set, Tuple, Type
 
 from core import utils
 from core.config import ConfigGroup, Configuration, ModelManager
@@ -19,7 +19,13 @@ from core.emane.linkmonitor import EmaneLinkMonitor
 from core.emane.nodes import EmaneNet
 from core.emane.rfpipe import EmaneRfPipeModel
 from core.emane.tdma import EmaneTdmaModel
-from core.emulator.enumerations import ConfigDataTypes, RegisterTlvs
+from core.emulator.data import LinkData
+from core.emulator.enumerations import (
+    ConfigDataTypes,
+    LinkTypes,
+    MessageFlags,
+    RegisterTlvs,
+)
 from core.errors import CoreCommandError, CoreError
 from core.nodes.base import CoreNode, NodeBase
 from core.nodes.interface import CoreInterface
@@ -458,7 +464,7 @@ class EmaneManager(ModelManager):
             model_class = self.models[model_name]
             emane_node.setmodel(model_class, config)
 
-    def nemlookup(self, nemid) -> Tuple[EmaneNet, CoreInterface]:
+    def nemlookup(self, nemid) -> Tuple[Optional[EmaneNet], Optional[CoreInterface]]:
         """
         Look for the given numerical NEM ID and return the first matching
         EMANE network and NEM interface.
@@ -476,6 +482,29 @@ class EmaneManager(ModelManager):
 
         return emane_node, netif
 
+    def get_nem_link(
+        self, nem1: int, nem2: int, flags: MessageFlags = MessageFlags.NONE
+    ) -> Optional[LinkData]:
+        emane1, netif = self.nemlookup(nem1)
+        if not emane1 or not netif:
+            logging.error("invalid nem: %s", nem1)
+            return None
+        node1 = netif.node
+        emane2, netif = self.nemlookup(nem2)
+        if not emane2 or not netif:
+            logging.error("invalid nem: %s", nem2)
+            return None
+        node2 = netif.node
+        color = self.session.get_link_color(emane1.id)
+        return LinkData(
+            message_type=flags,
+            node1_id=node1.id,
+            node2_id=node2.id,
+            network_id=emane1.id,
+            link_type=LinkTypes.WIRELESS,
+            color=color,
+        )
+
     def numnems(self) -> int:
         """
         Return the number of NEMs emulated locally.

daemon/core/emane/linkmonitor.py

@@ -285,26 +285,11 @@ class EmaneLinkMonitor:
 
     def send_link(self, message_type: MessageFlags, link_id: Tuple[int, int]) -> None:
         nem_one, nem_two = link_id
-        emane_one, netif = self.emane_manager.nemlookup(nem_one)
+        link = self.emane_manager.get_nem_link(nem_one, nem_two, message_type)
-        if not emane_one or not netif:
+        if link:
-            logging.error("invalid nem: %s", nem_one)
-            return
-        node_one = netif.node
-        emane_two, netif = self.emane_manager.nemlookup(nem_two)
-        if not emane_two or not netif:
-            logging.error("invalid nem: %s", nem_two)
-            return
-        node_two = netif.node
-        logging.debug(
-            "%s emane link from %s(%s) to %s(%s)",
-            message_type.name,
-            node_one.name,
-            nem_one,
-            node_two.name,
-            nem_two,
-        )
             label = self.get_link_label(link_id)
-        self.send_message(message_type, label, node_one.id, node_two.id, emane_one.id)
+            link.label = label
+            self.emane_manager.session.broadcast_link(link)
 
     def send_message(
         self,

daemon/core/emane/nodes.py

@@ -6,8 +6,9 @@ share the same MAC+PHY model.
 import logging
 from typing import TYPE_CHECKING, Dict, List, Optional, Tuple, Type
 
+from core.emulator.data import LinkData
 from core.emulator.distributed import DistributedServer
-from core.emulator.enumerations import LinkTypes, NodeTypes, RegisterTlvs
+from core.emulator.enumerations import LinkTypes, MessageFlags, NodeTypes, RegisterTlvs
 from core.nodes.base import CoreNetworkBase
 from core.nodes.interface import CoreInterface
 
@@ -236,3 +237,32 @@ class EmaneNet(CoreNetworkBase):
                 nemid, lon, lat, alt = position
                 event.append(nemid, latitude=lat, longitude=lon, altitude=alt)
         self.session.emane.service.publish(0, event)
+
+    def all_link_data(self, flags: MessageFlags = MessageFlags.NONE) -> List[LinkData]:
+        logging.info("gathering emane links: %s", self.id)
+        links = super().all_link_data(flags)
+        # gather current emane links
+        nem_ids = set(self.nemidmap.values())
+        logging.info("known nems: %s", nem_ids)
+        emane_manager = self.session.emane
+        emane_links = emane_manager.link_monitor.links
+        considered = set()
+        for link_key in emane_links:
+            considered_key = tuple(sorted(link_key))
+            if considered_key in considered:
+                continue
+            considered.add(considered_key)
+            logging.info("considering emane link: %s", considered_key)
+            nem1, nem2 = considered_key
+            # ignore links not related to this node
+            if nem1 not in nem_ids and nem2 not in nem_ids:
+                logging.info("ignore emane link not within network: %s", (nem1, nem2))
+                continue
+            # ignore incomplete links
+            if (nem2, nem1) not in emane_links:
+                logging.info("ignore emane link not complete: %s", (nem1, nem2))
+                continue
+            link = emane_manager.get_nem_link(nem1, nem2)
+            if link:
+                links.append(link)
+        return links