net: Providing an interface for mapLocalHost

Contributes to bitcoin#564 by providing an interface for mapLocalHost
through net -> node interface -> clientModel. Later this value can be
read by GUI to show the local addresses.

Author: jadijadi

src/interfaces/node.h

@@ -168,6 +168,9 @@ class Node
     //! Get num blocks.
     virtual int getNumBlocks() = 0;
 
+    //! Get network local addresses.
+    virtual std::map<CNetAddr, LocalServiceInfo> getNetLocalAddresses() = 0;
+
     //! Get best block hash.
     virtual uint256 getBestBlockHash() = 0;
 

src/net.cpp

@@ -3533,6 +3533,13 @@ size_t CConnman::GetNodeCount(ConnectionDirection flags) const
     return nNum;
 }
 
+
+std::map<CNetAddr, LocalServiceInfo> CConnman::getNetLocalAddresses() const
+{
+    LOCK(g_maplocalhost_mutex);
+    return mapLocalHost;
+}
+
 uint32_t CConnman::GetMappedAS(const CNetAddr& addr) const
 {
     return m_netgroupman.GetMappedAS(addr);

src/net.h

@@ -1205,6 +1205,7 @@ class CConnman
     bool AddConnection(const std::string& address, ConnectionType conn_type, bool use_v2transport) EXCLUSIVE_LOCKS_REQUIRED(!m_unused_i2p_sessions_mutex);
 
     size_t GetNodeCount(ConnectionDirection) const;
+    std::map<CNetAddr, LocalServiceInfo> getNetLocalAddresses() const;
     uint32_t GetMappedAS(const CNetAddr& addr) const;
     void GetNodeStats(std::vector<CNodeStats>& vstats) const;
     bool DisconnectNode(const std::string& node);

src/node/interfaces.cpp

@@ -281,6 +281,13 @@ class NodeImpl : public Node
         }
         return false;
     }
+    std::map<CNetAddr, LocalServiceInfo> getNetLocalAddresses() override
+    {
+        if (m_context->connman)
+            return m_context->connman->getNetLocalAddresses();
+        else
+            return {};
+    }
     int getNumBlocks() override
     {
         LOCK(::cs_main);

src/qt/clientmodel.cpp

@@ -123,6 +123,13 @@ int64_t ClientModel::getHeaderTipTime() const
     return cachedBestHeaderTime;
 }
 
+
+std::map<CNetAddr, LocalServiceInfo> ClientModel::getNetLocalAddresses() const
+{
+    return m_node.getNetLocalAddresses();
+}
+
+
 int ClientModel::getNumBlocks() const
 {
     if (m_cached_num_blocks == -1) {

src/qt/clientmodel.h

@@ -13,12 +13,15 @@
 #include <sync.h>
 #include <uint256.h>
 
+#include <netaddress.h>
+
 class BanTableModel;
 class CBlockIndex;
 class OptionsModel;
 class PeerTableModel;
 class PeerTableSortProxy;
 enum class SynchronizationState;
+struct LocalServiceInfo;
 
 namespace interfaces {
 class Handler;
@@ -68,6 +71,7 @@ class ClientModel : public QObject
 
     //! Return number of connections, default is in- and outbound (total)
     int getNumConnections(unsigned int flags = CONNECTIONS_ALL) const;
+    std::map<CNetAddr, LocalServiceInfo> getNetLocalAddresses() const;
     int getNumBlocks() const;
     uint256 getBestBlockHash() EXCLUSIVE_LOCKS_REQUIRED(!m_cached_tip_mutex);
     int getHeaderTipHeight() const;