redis based router & roomstore

pkg/routing/node.go

@@ -1,8 +1,10 @@
 package routing
 
 import (
+	"bytes"
 	"context"
 	"fmt"
+	"net"
 	"runtime"
 	"time"
 
@@ -30,7 +32,7 @@ func NewLocalNode(conf *config.Config) (LocalNode, error) {
 		return nil, err
 	}
 	return &livekit.Node{
-		Id:      utils.NewGuid(utils.NodePrefix),
+		Id:      fmt.Sprintf("%s%16.16X", utils.NodePrefix, macUint64()),
 		Ip:      ip,
 		NumCpus: uint32(runtime.NumCPU()),
 	}, nil
@@ -91,3 +93,33 @@ func GetLocalIP(stunServers []string) (string, error) {
 
 	return nodeIp, nil
 }
+
+func macUint64() uint64 {
+	interfaces, err := net.Interfaces()
+	if err != nil {
+		return 0
+	}
+
+	for _, i := range interfaces {
+		if i.Flags&net.FlagUp != 0 && bytes.Compare(i.HardwareAddr, nil) != 0 {
+
+			// Skip locally administered addresses
+			if i.HardwareAddr[0]&2 == 2 {
+				continue
+			}
+
+			var mac uint64
+			for j, b := range i.HardwareAddr {
+				if j >= 8 {
+					break
+				}
+				mac <<= 8
+				mac += uint64(b)
+			}
+
+			return mac
+		}
+	}
+
+	return 0
+}