A signaling server for GB28181

pkg/config/config.go

@@ -0,0 +1,56 @@
+package config
+
+import (
+	"fmt"
+	"net"
+)
+
+type MainConfig struct {
+	Serial         string `ymal:"serial"`
+	Realm          string `ymal:"realm"`
+	SipHost        string `ymal:"sip-host"`
+	SipPort        int    `ymal:"sip-port"`
+	MediaAddr      string `ymal:"media-addr"`
+	HttpServerPort int    `ymal:"http-server-port"`
+	APIPort        int    `ymal:"api-port"`
+}
+
+func GetLocalIP() (string, error) {
+	ifaces, err := net.Interfaces()
+	if err != nil {
+		return "", nil
+	}
+	type Iface struct {
+		Name string
+		Addr net.IP
+	}
+	var candidates []Iface
+	for _, ifc := range ifaces {
+		if ifc.Flags&net.FlagUp == 0 || ifc.Flags&net.FlagUp == 0 {
+			continue
+		}
+		if ifc.Flags&(net.FlagPointToPoint|net.FlagLoopback) != 0 {
+			continue
+		}
+		addrs, err := ifc.Addrs()
+		if err != nil {
+			continue
+		}
+		for _, addr := range addrs {
+			ipnet, ok := addr.(*net.IPNet)
+			if !ok {
+				continue
+			}
+			if ip4 := ipnet.IP.To4(); ip4 != nil {
+				candidates = append(candidates, Iface{
+					Name: ifc.Name, Addr: ip4,
+				})
+				//logger.Tf("considering interface", "iface", ifc.Name, "ip", ip4)
+			}
+		}
+	}
+	if len(candidates) == 0 {
+		return "", fmt.Errorf("No local IP found")
+	}
+	return candidates[0].Addr.String(), nil
+}