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/ganserv.go

@@ -0,0 +1,130 @@
+package ganserv
+
+import (
+	"log"
+	"net"
+
+	"aroz.org/zoraxy/ztnc/mod/database"
+)
+
+/*
+	Global Area Network
+	Server side implementation
+
+	This module do a few things to help manage
+	the system GANs
+
+	- Provide DHCP assign to client
+	- Provide a list of connected nodes in the same VLAN
+	- Provide proxy of packet if the target VLAN is online but not reachable
+
+	Also provide HTTP Handler functions for management
+	- Create Network
+	- Update Network Properties (Name / Desc)
+	- Delete Network
+
+	- Authorize Node
+	- Deauthorize Node
+	- Set / Get Network Prefered Subnet Mask
+	- Handle Node ping
+*/
+
+type Node struct {
+	Auth          bool   //If the node is authorized in this network
+	ClientID      string //The client ID
+	MAC           string //The tap MAC this client is using
+	Name          string //Name of the client in this network
+	Description   string //Description text
+	ManagedIP     net.IP //The IP address assigned by this network
+	LastSeen      int64  //Last time it is seen from this host
+	ClientVersion string //Client application version
+	PublicIP      net.IP //Public IP address as seen from this host
+}
+
+type Network struct {
+	UID         string  //UUID of the network, must be a 16 char random ASCII string
+	Name        string  //Name of the network, ASCII only
+	Description string  //Description of the network
+	CIDR        string  //The subnet masked use by this network
+	Nodes       []*Node //The nodes currently attached in this network
+}
+
+type NetworkManagerOptions struct {
+	Database  *database.Database
+	AuthToken string
+	ApiPort   int
+}
+
+type NetworkMetaData struct {
+	Desc string
+}
+
+type MemberMetaData struct {
+	Name string
+}
+
+type NetworkManager struct {
+	authToken        string
+	apiPort          int
+	ControllerID     string
+	option           *NetworkManagerOptions
+	networksMetadata map[string]NetworkMetaData
+}
+
+// Create a new GAN manager
+func NewNetworkManager(option *NetworkManagerOptions) *NetworkManager {
+	option.Database.NewTable("ganserv")
+
+	//Load network metadata
+	networkMeta := map[string]NetworkMetaData{}
+	if option.Database.KeyExists("ganserv", "networkmeta") {
+		option.Database.Read("ganserv", "networkmeta", &networkMeta)
+	}
+
+	//Start the zerotier instance if not exists
+
+	//Get controller info
+	instanceInfo, err := getControllerInfo(option.AuthToken, option.ApiPort)
+	if err != nil {
+		log.Println("ZeroTier connection failed: ", err.Error())
+		return &NetworkManager{
+			authToken:        option.AuthToken,
+			apiPort:          option.ApiPort,
+			ControllerID:     "",
+			option:           option,
+			networksMetadata: networkMeta,
+		}
+	}
+
+	return &NetworkManager{
+		authToken:        option.AuthToken,
+		apiPort:          option.ApiPort,
+		ControllerID:     instanceInfo.Address,
+		option:           option,
+		networksMetadata: networkMeta,
+	}
+}
+
+func (m *NetworkManager) GetNetworkMetaData(netid string) *NetworkMetaData {
+	md, ok := m.networksMetadata[netid]
+	if !ok {
+		return &NetworkMetaData{}
+	}
+
+	return &md
+}
+
+func (m *NetworkManager) WriteNetworkMetaData(netid string, meta *NetworkMetaData) {
+	m.networksMetadata[netid] = *meta
+	m.option.Database.Write("ganserv", "networkmeta", m.networksMetadata)
+}
+
+func (m *NetworkManager) GetMemberMetaData(netid string, memid string) *MemberMetaData {
+	thisMemberData := MemberMetaData{}
+	m.option.Database.Read("ganserv", "memberdata_"+netid+"_"+memid, &thisMemberData)
+	return &thisMemberData
+}
+
+func (m *NetworkManager) WriteMemeberMetaData(netid string, memid string, meta *MemberMetaData) {
+	m.option.Database.Write("ganserv", "memberdata_"+netid+"_"+memid, meta)
+}