fix(network): initialize all fields

Some fields were previously uninitialized (e.g. carrier), which
could lead to UB.

Author: notpeelz

include/modules/network.hpp

@@ -27,8 +27,8 @@ class Network : public ALabel {
   auto update() -> void override;
 
  private:
-  static const uint8_t MAX_RETRY = 5;
-  static const uint8_t EPOLL_MAX = 200;
+  static const uint8_t MAX_RETRY{5};
+  static const uint8_t EPOLL_MAX{200};
 
   static int handleEvents(struct nl_msg*, void*);
   static int handleEventsDone(struct nl_msg*, void*);
@@ -51,37 +51,37 @@ class Network : public ALabel {
   bool wildcardMatch(const std::string& pattern, const std::string& text) const;
   std::optional<std::pair<unsigned long long, unsigned long long>> readBandwidthUsage();
 
-  int ifid_;
-  ip_addr_pref addr_pref_;
-  struct sockaddr_nl nladdr_ = {0};
-  struct nl_sock* sock_ = nullptr;
-  struct nl_sock* ev_sock_ = nullptr;
-  int efd_;
-  int ev_fd_;
-  int nl80211_id_;
+  int ifid_{-1};
+  ip_addr_pref addr_pref_{ip_addr_pref::IPV4};
+  struct sockaddr_nl nladdr_{0};
+  struct nl_sock* sock_{nullptr};
+  struct nl_sock* ev_sock_{nullptr};
+  int efd_{-1};
+  int ev_fd_{-1};
+  int nl80211_id_{-1};
   std::mutex mutex_;
 
-  bool want_route_dump_;
-  bool want_link_dump_;
-  bool want_addr_dump_;
-  bool dump_in_progress_;
-  bool is_p2p_;
+  bool want_route_dump_{false};
+  bool want_link_dump_{false};
+  bool want_addr_dump_{false};
+  bool dump_in_progress_{false};
+  bool is_p2p_{false};
 
-  unsigned long long bandwidth_down_total_;
-  unsigned long long bandwidth_up_total_;
+  unsigned long long bandwidth_down_total_{0};
+  unsigned long long bandwidth_up_total_{0};
 
   std::string state_;
   std::string essid_;
   std::string bssid_;
-  bool carrier_;
+  bool carrier_{false};
   std::string ifname_;
   std::string ipaddr_;
   std::string ipaddr6_;
   std::string gwaddr_;
   std::string netmask_;
   std::string netmask6_;
-  int cidr_;
-  int cidr6_;
+  int cidr_{0};
+  int cidr6_{0};
   int32_t signal_strength_dbm_;
   uint8_t signal_strength_;
   std::string signal_strength_app_;
@@ -90,9 +90,9 @@ class Network : public ALabel {
   util::SleeperThread thread_;
   util::SleeperThread thread_timer_;
 #ifdef WANT_RFKILL
-  util::Rfkill rfkill_;
+  util::Rfkill rfkill_{RFKILL_TYPE_WLAN};
 #endif
-  float frequency_;
+  float frequency_{0};
 };
 
 }  // namespace waybar::modules

src/modules/network.cpp

@@ -78,25 +78,7 @@ waybar::modules::Network::readBandwidthUsage() {
 }
 
 waybar::modules::Network::Network(const std::string &id, const Json::Value &config)
-    : ALabel(config, "network", id, DEFAULT_FORMAT, 60),
-      ifid_(-1),
-      addr_pref_(IPV4),
-      efd_(-1),
-      ev_fd_(-1),
-      want_route_dump_(false),
-      want_link_dump_(false),
-      want_addr_dump_(false),
-      dump_in_progress_(false),
-      is_p2p_(false),
-      cidr_(0),
-      cidr6_(0),
-      signal_strength_dbm_(0),
-      signal_strength_(0),
-#ifdef WANT_RFKILL
-      rfkill_{RFKILL_TYPE_WLAN},
-#endif
-      frequency_(0.0) {
-
+    : ALabel(config, "network", id, DEFAULT_FORMAT, 60) {
   // Start with some "text" in the module's label_. update() will then
   // update it. Since the text should be different, update() will be able
   // to show or hide the event_box_. This is to work around the case where