feat(net): Support bridge interfaces (#1528)

Bridge interfaces don't provide linkspeed via ethtool but everything else works the same as with ethernet links.

Fixes #1522

include/adapters/net.hpp

@@ -87,7 +87,7 @@ namespace net {
     void set_unknown_up(bool unknown = true);
 
    protected:
-    void check_tuntap();
+    void check_tuntap_or_bridge();
     bool test_interface() const;
     string format_speedrate(float bytes_diff, int minwidth) const;
     void query_ip6();
@@ -97,6 +97,7 @@ namespace net {
     link_status m_status{};
     string m_interface;
     bool m_tuntap{false};
+    bool m_bridge{false};
     bool m_unknown_up{false};
   };
 

src/adapters/net.cpp

@@ -45,7 +45,7 @@ namespace net {
       throw network_error("Failed to open socket");
     }
 
-    check_tuntap();
+    check_tuntap_or_bridge();
   }
 
   /**
@@ -174,9 +174,9 @@ namespace net {
 
   /**
    * Query driver info to check if the
-   * interface is a TUN/TAP device
+   * interface is a TUN/TAP device or BRIDGE
    */
-  void network::check_tuntap() {
+  void network::check_tuntap_or_bridge() {
     struct ethtool_drvinfo driver {};
     struct ifreq request {};
 
@@ -204,6 +204,11 @@ namespace net {
     } else {
       m_tuntap = false;
     }
+
+    if (strncmp(driver.driver, "bridge", 6) == 0) {
+      m_bridge = true;
+    }
+
   }
 
   /**
@@ -248,6 +253,13 @@ namespace net {
       return false;
     }
 
+    if(m_bridge) {
+      /* If bridge network then link speed cannot be computed
+       * TODO: Identify the physical network in bridge and compute the link speed
+       */
+      return true;
+    }
+
     struct ifreq request {};
     struct ethtool_cmd data {};