feat: embed optional apps in player server

pkg/network/network.go

@@ -0,0 +1,60 @@
+package network
+
+import (
+	"net"
+
+	"github.com/pkg/errors"
+	"github.com/wlynxg/anet"
+)
+
+var (
+	_, lanA, _ = net.ParseCIDR("10.0.0.0/8")
+	_, lanB, _ = net.ParseCIDR("172.16.0.0/12")
+	_, lanC, _ = net.ParseCIDR("192.168.0.0/16")
+)
+
+func GetLANIPv4Addrs() ([]string, error) {
+	ips := make([]string, 0)
+
+	addrs, err := anet.InterfaceAddrs()
+	if err != nil {
+		return nil, errors.WithStack(err)
+	}
+
+	for _, address := range addrs {
+		if ipnet, ok := address.(*net.IPNet); ok && !ipnet.IP.IsLoopback() {
+			ipv4 := ipnet.IP.To4()
+			if ipv4 == nil {
+				continue
+			}
+
+			isLAN := lanA.Contains(ipv4) || lanB.Contains(ipv4) || lanC.Contains(ipv4)
+			if !isLAN {
+				continue
+			}
+
+			ips = append(ips, ipv4.String())
+		}
+	}
+
+	return ips, nil
+}
+
+func FindPreferredLocalAddress(ips ...net.IP) (string, error) {
+	localAddrs, err := anet.InterfaceAddrs()
+	if err != nil {
+		return "", errors.WithStack(err)
+	}
+
+	for _, addr := range localAddrs {
+		if ipnet, ok := addr.(*net.IPNet); ok && !ipnet.IP.IsLoopback() {
+			for _, ip := range ips {
+				if ipnet.Contains(ip) {
+					return ip.String(), nil
+				}
+			}
+		}
+	}
+
+	return ips[0].String(), nil
+}