fix private subnets bug

handler/routes.go

@@ -157,6 +157,12 @@ func NewClient() echo.HandlerFunc {
 			return c.JSON(http.StatusBadRequest, jsonHTTPResponse{false, "Allowed IPs must be in CIDR format"})
 		}
 
+		// validate the input PrivateSubnets
+		if util.ValidatePrivateSubnets(client.PrivateSubnets) == false {
+			log.Warnf("Invalid Private Subnets input from user: %v", client.PrivateSubnets)
+			return c.JSON(http.StatusBadRequest, jsonHTTPResponse{false, "Private Subnets must be in CIDR format"})
+		}
+
 		// gen ID
 		guid := xid.New()
 		client.ID = guid.String()
@@ -180,6 +186,14 @@ func NewClient() echo.HandlerFunc {
 		client.CreatedAt = time.Now().UTC()
 		client.UpdatedAt = client.CreatedAt
 
+		client.HasPrivateSubnet = false
+		for _, privateSubnet := range client.PrivateSubnets {
+			if privateSubnet != "" {
+				client.HasPrivateSubnet = true
+			}
+		}
+		
+
 		// write client to the database
 		db.Write("clients", client.ID, client)
 		log.Infof("Created wireguard client: %v", client)
@@ -229,14 +243,28 @@ func UpdateClient() echo.HandlerFunc {
 			return c.JSON(http.StatusBadRequest, jsonHTTPResponse{false, "Allowed IPs must be in CIDR format"})
 		}
 
+		// validate the input PrivateSubnets
+		if util.ValidatePrivateSubnets(_client.PrivateSubnets) == false {
+			log.Warnf("Invalid Private Subnets input from user: %v", _client.PrivateSubnets)
+			return c.JSON(http.StatusBadRequest, jsonHTTPResponse{false, "Private Subnets must be in CIDR format"})
+		}
+
 		// map new data
 		client.Name = _client.Name
 		client.Email = _client.Email
 		client.Enabled = _client.Enabled
 		client.AllocatedIPs = _client.AllocatedIPs
 		client.AllowedIPs = _client.AllowedIPs
+		client.PrivateSubnets = _client.PrivateSubnets
 		client.UpdatedAt = time.Now().UTC()
 
+		client.HasPrivateSubnet = false
+		for _, privateSubnet := range client.PrivateSubnets {
+			if privateSubnet != "" {
+				client.HasPrivateSubnet = true
+			}
+		}
+
 		// write to the database
 		db.Write("clients", client.ID, &client)
 		log.Infof("Updated client information successfully => %v", client)

model/client.go

@@ -14,6 +14,7 @@ type Client struct {
 	Email            string    `json:"email"`
 	AllocatedIPs     []string  `json:"allocated_ips"`
 	AllowedIPs       []string  `json:"allowed_ips"`
+	HasPrivateSubnet bool      `json:"hasPrivateSubnet"`
 	PrivateSubnets   []string  `json:"private_subnets"`
 	Enabled          bool      `json:"enabled"`
 	CreatedAt        time.Time `json:"created_at"`

templates/base.html

@@ -154,7 +154,7 @@
                                     value="0.0.0.0/0">
                             </div>
                             <div class="form-group">
-                                <label for="client_private_subnets" class="control-label">Allowed IPs</label>
+                                <label for="client_private_subnets" class="control-label">Private Subnets</label>
                                 <input type="text" data-role="tagsinput" class="form-control" id="client_private_subnets">
                             </div>
                             <div class="form-group">

templates/wg.conf

@@ -20,5 +20,5 @@ PostDown = {{ .serverConfig.Interface.PostDown }}
 [Peer]
 PublicKey = {{ .Client.PublicKey }}
 PresharedKey = {{ .Client.PresharedKey }}
-AllowedIPs = {{$first :=true}}{{range .Client.AllocatedIPs }}{{if $first}}{{$first = false}}{{else}},{{end}}{{.}}{{end}}{{if .Client.PrivateSubnets}},{{end}}{{$first :=true}}{{range .Client.PrivateSubnets }}{{if $first}}{{$first = false}}{{else}},{{end}}{{.}}{{end}}
+AllowedIPs = {{$first :=true}}{{range .Client.AllocatedIPs }}{{if $first}}{{$first = false}}{{else}},{{end}}{{.}}{{end}}{{if eq .Client.HasPrivateSubnet true}},{{$first :=true}}{{range .Client.PrivateSubnets }}{{if $first}}{{$first = false}}{{else}},{{end}}{{.}}{{end}}{{end}}
 {{end}}{{end}}

util/util.go

@@ -57,7 +57,7 @@ func ValidateCIDR(cidr string) bool {
 // ValidateCIDRList to validate a list of network CIDR
 func ValidateCIDRList(cidrs []string) bool {
 	for _, cidr := range cidrs {
-		if ValidateCIDR(cidr) == false {
+		if cidr != "" && ValidateCIDR(cidr) == false {
 			return false
 		}
 	}
@@ -72,6 +72,14 @@ func ValidateAllowedIPs(cidrs []string) bool {
 	return true
 }
 
+// ValidatePrivateSubnets to validate allowed ip addresses in CIDR format
+func ValidatePrivateSubnets(cidrs []string) bool {
+	if ValidateCIDRList(cidrs) == false {
+		return false
+	}
+	return true
+}
+
 // ValidateServerAddresses to validate allowed ip addresses in CIDR format
 func ValidateServerAddresses(cidrs []string) bool {
 	if ValidateCIDRList(cidrs) == false {