Added embed server for plugin library

- Added embeded resources server for plugin library
- Added ztnc plugin for global area network
- Added wide mode for side wrapper

example/plugins/ztnc/mod/ganserv/utils.go

@@ -0,0 +1,55 @@
+package ganserv
+
+import (
+	"net"
+)
+
+//Generate all ip address from a CIDR
+func GetAllAddressFromCIDR(cidr string) ([]string, error) {
+	ip, ipnet, err := net.ParseCIDR(cidr)
+	if err != nil {
+		return nil, err
+	}
+
+	var ips []string
+	for ip := ip.Mask(ipnet.Mask); ipnet.Contains(ip); inc(ip) {
+		ips = append(ips, ip.String())
+	}
+	// remove network address and broadcast address
+	return ips[1 : len(ips)-1], nil
+}
+
+func inc(ip net.IP) {
+	for j := len(ip) - 1; j >= 0; j-- {
+		ip[j]++
+		if ip[j] > 0 {
+			break
+		}
+	}
+}
+
+func isValidIPAddr(ipAddr string) bool {
+	ip := net.ParseIP(ipAddr)
+	if ip == nil {
+		return false
+	}
+
+	return true
+}
+
+func ipWithinCIDR(ipAddr string, cidr string) bool {
+	// Parse the CIDR string
+	_, ipNet, err := net.ParseCIDR(cidr)
+	if err != nil {
+		return false
+	}
+
+	// Parse the IP address
+	ip := net.ParseIP(ipAddr)
+	if ip == nil {
+		return false
+	}
+
+	// Check if the IP address is in the CIDR range
+	return ipNet.Contains(ip)
+}