feat(net): Add unknown-as-up option

Fixes polybar#457

include/adapters/net.hpp

@@ -68,6 +68,7 @@ namespace net {
     string ip() const;
     string downspeed(int minwidth = 3) const;
     string upspeed(int minwidth = 3) const;
+    void set_unknown_up(bool unknown = true);
 
    protected:
     void check_tuntap();
@@ -78,6 +79,7 @@ namespace net {
     link_status m_status{};
     string m_interface;
     bool m_tuntap{false};
+    bool m_unknown_up{false};
   };
 
   // }}}

include/modules/network.hpp

@@ -51,6 +51,7 @@ namespace modules {
     int m_ping_nth_update{0};
     int m_udspeed_minwidth{0};
     bool m_accumulate{false};
+    bool m_unknown_up{false};
   };
 }
 

src/adapters/net.cpp

@@ -141,6 +141,13 @@ namespace net {
     return format_speedrate(bytes_diff, minwidth);
   }
 
+  /**
+   * Set if unknown counts as up
+   */
+  void network::set_unknown_up(bool unknown) {
+    m_unknown_up = unknown;
+  }
+
   /**
    * Query driver info to check if the
    * interface is a TUN/TAP device
@@ -174,7 +181,9 @@ namespace net {
    * Test if the network interface is in a valid state
    */
   bool network::test_interface() const {
-    return file_util::contents("/sys/class/net/" + m_interface + "/operstate").compare(0, 2, "up") == 0;
+    auto operstate = file_util::contents("/sys/class/net" + m_interface + "/operstate");
+    bool up = operstate.compare(0, 2, "up") == 0;
+    return m_unknown_up ? (up || operstate.compare(0, 7, "unknown") == 0) : up;
   }
 
   /**

src/modules/network.cpp

@@ -20,6 +20,7 @@ namespace modules {
     m_udspeed_minwidth = m_conf.get(name(), "udspeed-minwidth", m_udspeed_minwidth);
     m_accumulate = m_conf.get(name(), "accumulate-stats", m_accumulate);
     m_interval = m_conf.get<decltype(m_interval)>(name(), "interval", 1s);
+    m_unknown_up = m_conf.get<bool>(name(), "unknown-as-up", false);
 
     m_conf.warn_deprecated(name(), "udspeed-minwidth", "%downspeed:min:max% and %upspeed:min:max%");
 
@@ -62,8 +63,10 @@ namespace modules {
     // Get an intstance of the network interface
     if (net::is_wireless_interface(m_interface)) {
       m_wireless = factory_util::unique<net::wireless_network>(m_interface);
+      m_wireless->set_unknown_up(m_unknown_up);
     } else {
       m_wired = factory_util::unique<net::wired_network>(m_interface);
+      m_wired->set_unknown_up(m_unknown_up);
     };
 
     // We only need to start the subthread if the packetloss animation is used