feat(network): display ip address and subnetmask

include/modules/network.hpp

@@ -1,6 +1,8 @@
 #pragma once
 
 #include <net/if.h>
+#include <arpa/inet.h>
+#include <ifaddrs.h>
 #include <netlink/netlink.h>
 #include <netlink/genl/genl.h>
 #include <netlink/genl/ctrl.h>
@@ -24,6 +26,7 @@ class Network : public ALabel {
     void disconnected();
     void initNL80211();
     int getExternalInterface();
+    void getInterfaceAddress();
     void parseEssid(struct nlattr**);
     void parseSignal(struct nlattr**);
     bool associatedOrJoined(struct nlattr**);
@@ -39,6 +42,9 @@ class Network : public ALabel {
 
     std::string essid_;
     std::string ifname_;
+    std::string ipaddr_;
+    std::string netmask_;
+    int cidr_;
     int signal_strength_dbm_;
     uint16_t signal_strength_;
 };

src/modules/network.cpp

@@ -26,6 +26,7 @@ waybar::modules::Network::Network(const Json::Value& config)
       char ifname[IF_NAMESIZE];
       if_indextoname(ifid_, ifname);
       ifname_ = ifname;
+      getInterfaceAddress();
     }
   }
   initNL80211();
@@ -64,6 +65,7 @@ waybar::modules::Network::Network(const Json::Value& config)
         char ifname[IF_NAMESIZE];
         if_indextoname(ifid_, ifname);
         ifname_ = ifname;
+        getInterfaceAddress();
         need_update = true;
       }
     }
@@ -101,7 +103,10 @@ auto waybar::modules::Network::update() -> void
     fmt::arg("essid", essid_),
     fmt::arg("signaldBm", signal_strength_dbm_),
     fmt::arg("signalStrength", signal_strength_),
-    fmt::arg("ifname", ifname_)
+    fmt::arg("ifname", ifname_),
+    fmt::arg("netmask", netmask_),
+    fmt::arg("ipaddr", ipaddr_),
+    fmt::arg("cidr", cidr_)
   ));
 }
 
@@ -110,6 +115,9 @@ void waybar::modules::Network::disconnected()
   essid_.clear();
   signal_strength_dbm_ = 0;
   signal_strength_ = 0;
+  ipaddr_.clear();
+  netmask_.clear();
+  cidr_ = 0;
   ifname_.clear();
   ifid_ = -1;
 }
@@ -255,6 +263,32 @@ out:
   return ifidx;
 }
 
+void waybar::modules::Network::getInterfaceAddress() {
+  unsigned int cidrRaw;
+  struct ifaddrs *ifaddr, *ifa;
+  int success = getifaddrs(&ifaddr);
+  if (success == 0) {
+    ifa = ifaddr;
+    while(ifa != NULL && ipaddr_.empty() && netmask_.empty()) {
+      if(ifa->ifa_addr->sa_family == family_) {
+        if(strcmp(ifa->ifa_name, ifname_.c_str()) == 0){
+          ipaddr_=inet_ntoa(((struct sockaddr_in*)ifa->ifa_addr)->sin_addr);
+          netmask_=inet_ntoa(((struct sockaddr_in*)ifa->ifa_netmask)->sin_addr);
+          cidrRaw = ((struct sockaddr_in *)(ifa->ifa_netmask))->sin_addr.s_addr;
+          unsigned int cidr = 0;
+          while (cidrRaw) {
+              cidr += cidrRaw & 1;
+              cidrRaw >>= 1;
+          }
+          cidr_ = cidr;
+        }
+      }
+      ifa = ifa->ifa_next;
+    }
+  }
+  freeifaddrs(ifaddr);
+}
+
 int waybar::modules::Network::netlinkRequest(int fd, void *req,
   uint32_t reqlen, uint32_t groups)
 {