v2 init commit

src/mod/ganserv/network.go

@@ -0,0 +1,39 @@
+package ganserv
+
+import (
+	"fmt"
+	"math/rand"
+	"net"
+	"time"
+)
+
+//Get a random free IP from the pool
+func (n *Network) GetRandomFreeIP() (net.IP, error) {
+	// Get all IP addresses in the subnet
+	ips, err := GetAllAddressFromCIDR(n.CIDR)
+	if err != nil {
+		return nil, err
+	}
+
+	// Filter out used IPs
+	usedIPs := make(map[string]bool)
+	for _, node := range n.Nodes {
+		usedIPs[node.ManagedIP.String()] = true
+	}
+	availableIPs := []string{}
+	for _, ip := range ips {
+		if !usedIPs[ip] {
+			availableIPs = append(availableIPs, ip)
+		}
+	}
+
+	// Randomly choose an available IP
+	if len(availableIPs) == 0 {
+		return nil, fmt.Errorf("no available IP")
+	}
+	rand.Seed(time.Now().UnixNano())
+	randIndex := rand.Intn(len(availableIPs))
+	pickedFreeIP := availableIPs[randIndex]
+
+	return net.ParseIP(pickedFreeIP), nil
+}