wifi: Add a WifiMac method to get the set of link IDs

src/wifi/model/wifi-mac.cc

@@ -897,6 +897,7 @@ WifiMac::SetWifiRemoteStationManagers(
     {
         // the link may already exist in case PHY objects were configured first
         auto [it, inserted] = m_links.emplace(i, CreateLinkEntity());
+        m_linkIds.insert(i);
         it->second->stationManager = stationManagers[i];
     }
 }
@@ -934,6 +935,12 @@ WifiMac::GetNLinks() const
     return m_links.size();
 }
 
+const std::set<uint8_t>&
+WifiMac::GetLinkIds() const
+{
+    return m_linkIds;
+}
+
 void
 WifiMac::UpdateLinkId(uint8_t id)
 {
@@ -1034,6 +1041,12 @@ WifiMac::SwapLinks(std::map<uint8_t, uint8_t> links)
             to = nextTo->second;
         } while (true);
     }
+
+    m_linkIds.clear();
+    for (const auto& [id, link] : m_links)
+    {
+        m_linkIds.insert(id);
+    }
 }
 
 void
@@ -1056,6 +1069,7 @@ WifiMac::SetWifiPhys(const std::vector<Ptr<WifiPhy>>& phys)
         // (ResetWifiPhys just nullified the PHY(s) but left the links)
         // or the remote station managers were configured first
         auto [it, inserted] = m_links.emplace(i, CreateLinkEntity());
+        m_linkIds.insert(i);
         it->second->phy = phys[i];
     }
 }

src/wifi/model/wifi-mac.h

@@ -142,6 +142,12 @@ class WifiMac : public Object
      * \return the number of links used by this MAC
      */
     uint8_t GetNLinks() const;
+
+    /**
+     * \return the set of link IDs in use by this device
+     */
+    const std::set<uint8_t>& GetLinkIds() const;
+
     /**
      * Get the ID of the link having the given MAC address, if any.
      *
@@ -974,6 +980,7 @@ class WifiMac : public Object
 
     Ptr<WifiNetDevice> m_device;                            //!< Pointer to the device
     std::map<uint8_t, std::unique_ptr<LinkEntity>> m_links; //!< ID-indexed map of Link objects
+    std::set<uint8_t> m_linkIds;                            //!< IDs of the links in use
 
     Mac48Address m_address; //!< MAC address of this station
     Ssid m_ssid;            //!< Service Set ID (SSID)