mirror of
https://github.com/gravitl/netmaker.git
synced 2024-11-11 18:32:08 +08:00
338 lines
11 KiB
Go
338 lines
11 KiB
Go
package functions
|
|
|
|
import (
|
|
"encoding/json"
|
|
"errors"
|
|
"fmt"
|
|
"net"
|
|
"os"
|
|
"runtime"
|
|
"strings"
|
|
"time"
|
|
|
|
mqtt "github.com/eclipse/paho.mqtt.golang"
|
|
"github.com/gravitl/netmaker/logger"
|
|
"github.com/gravitl/netmaker/models"
|
|
"github.com/gravitl/netmaker/netclient/config"
|
|
"github.com/gravitl/netmaker/netclient/local"
|
|
"github.com/gravitl/netmaker/netclient/ncutils"
|
|
"github.com/gravitl/netmaker/netclient/wireguard"
|
|
"github.com/guumaster/hostctl/pkg/file"
|
|
"github.com/guumaster/hostctl/pkg/parser"
|
|
"github.com/guumaster/hostctl/pkg/types"
|
|
"golang.zx2c4.com/wireguard/wgctrl/wgtypes"
|
|
)
|
|
|
|
// All -- mqtt message hander for all ('#') topics
|
|
var All mqtt.MessageHandler = func(client mqtt.Client, msg mqtt.Message) {
|
|
logger.Log(0, "default message handler -- received message but not handling")
|
|
logger.Log(0, "topic: "+string(msg.Topic()))
|
|
//logger.Log(0, "Message: " + string(msg.Payload()))
|
|
}
|
|
|
|
// NodeUpdate -- mqtt message handler for /update/<NodeID> topic
|
|
func NodeUpdate(client mqtt.Client, msg mqtt.Message) {
|
|
var newNode models.Node
|
|
var nodeCfg config.ClientConfig
|
|
var network = parseNetworkFromTopic(msg.Topic())
|
|
nodeCfg.Network = network
|
|
nodeCfg.ReadConfig()
|
|
|
|
data, dataErr := decryptMsg(&nodeCfg, msg.Payload())
|
|
if dataErr != nil {
|
|
return
|
|
}
|
|
err := json.Unmarshal([]byte(data), &newNode)
|
|
if err != nil {
|
|
logger.Log(0, "error unmarshalling node update data"+err.Error())
|
|
return
|
|
}
|
|
|
|
// see if cache hit, if so skip
|
|
var currentMessage = read(newNode.Network, lastNodeUpdate)
|
|
if currentMessage == string(data) {
|
|
return
|
|
}
|
|
insert(newNode.Network, lastNodeUpdate, string(data)) // store new message in cache
|
|
logger.Log(0, "network:", newNode.Network, "received message to update node "+newNode.Name)
|
|
|
|
// ensure that OS never changes
|
|
newNode.OS = runtime.GOOS
|
|
// check if interface needs to delta
|
|
ifaceDelta := ncutils.IfaceDelta(&nodeCfg.Node, &newNode)
|
|
shouldDNSChange := nodeCfg.Node.DNSOn != newNode.DNSOn
|
|
hubChange := nodeCfg.Node.IsHub != newNode.IsHub
|
|
keepaliveChange := nodeCfg.Node.PersistentKeepalive != newNode.PersistentKeepalive
|
|
|
|
nodeCfg.Node = newNode
|
|
switch newNode.Action {
|
|
case models.NODE_DELETE:
|
|
logger.Log(0, "network:", nodeCfg.Node.Network, " received delete request for %s", nodeCfg.Node.Name)
|
|
unsubscribeNode(client, &nodeCfg)
|
|
if err = LeaveNetwork(nodeCfg.Node.Network); err != nil {
|
|
if !strings.Contains("rpc error", err.Error()) {
|
|
logger.Log(0, "failed to leave, please check that local files for network", nodeCfg.Node.Network, "were removed")
|
|
return
|
|
}
|
|
}
|
|
logger.Log(0, nodeCfg.Node.Name, "was removed from network", nodeCfg.Node.Network)
|
|
return
|
|
case models.NODE_UPDATE_KEY:
|
|
// == get the current key for node ==
|
|
oldPrivateKey, retErr := wireguard.RetrievePrivKey(nodeCfg.Network)
|
|
if retErr != nil {
|
|
break
|
|
}
|
|
if err := UpdateKeys(&nodeCfg, client); err != nil {
|
|
logger.Log(0, "err updating wireguard keys, reusing last key\n", err.Error())
|
|
if key, parseErr := wgtypes.ParseKey(oldPrivateKey); parseErr == nil {
|
|
wireguard.StorePrivKey(key.String(), nodeCfg.Network)
|
|
nodeCfg.Node.PublicKey = key.PublicKey().String()
|
|
}
|
|
}
|
|
ifaceDelta = true
|
|
case models.NODE_FORCE_UPDATE:
|
|
ifaceDelta = true
|
|
case models.NODE_NOOP:
|
|
default:
|
|
}
|
|
// Save new config
|
|
nodeCfg.Node.Action = models.NODE_NOOP
|
|
if err := config.Write(&nodeCfg, nodeCfg.Network); err != nil {
|
|
logger.Log(0, nodeCfg.Node.Network, "error updating node configuration: ", err.Error())
|
|
}
|
|
nameserver := nodeCfg.Server.CoreDNSAddr
|
|
privateKey, err := wireguard.RetrievePrivKey(newNode.Network)
|
|
if err != nil {
|
|
logger.Log(0, "error reading PrivateKey "+err.Error())
|
|
return
|
|
}
|
|
file := ncutils.GetNetclientPathSpecific() + nodeCfg.Node.Interface + ".conf"
|
|
|
|
if newNode.ListenPort != nodeCfg.Node.LocalListenPort {
|
|
if err := wireguard.RemoveConf(newNode.Interface, false); err != nil {
|
|
logger.Log(0, "error remove interface", newNode.Interface, err.Error())
|
|
}
|
|
err = ncutils.ModPort(&newNode)
|
|
if err != nil {
|
|
logger.Log(0, "network:", nodeCfg.Node.Network, "error modifying node port on", newNode.Name, "-", err.Error())
|
|
return
|
|
}
|
|
ifaceDelta = true
|
|
informPortChange(&newNode)
|
|
}
|
|
if err := wireguard.UpdateWgInterface(file, privateKey, nameserver, newNode); err != nil {
|
|
logger.Log(0, "error updating wireguard config "+err.Error())
|
|
return
|
|
}
|
|
if keepaliveChange {
|
|
wireguard.UpdateKeepAlive(file, newNode.PersistentKeepalive)
|
|
}
|
|
logger.Log(0, "applying WG conf to "+file)
|
|
if ncutils.IsWindows() {
|
|
wireguard.RemoveConfGraceful(nodeCfg.Node.Interface)
|
|
}
|
|
err = wireguard.ApplyConf(&nodeCfg.Node, nodeCfg.Node.Interface, file)
|
|
if err != nil {
|
|
logger.Log(0, "error restarting wg after node update -", err.Error())
|
|
return
|
|
}
|
|
|
|
time.Sleep(time.Second)
|
|
// if newNode.DNSOn == "yes" {
|
|
// for _, server := range newNode.NetworkSettings.DefaultServerAddrs {
|
|
// if server.IsLeader {
|
|
// go local.SetDNSWithRetry(newNode, server.Address)
|
|
// break
|
|
// }
|
|
// }
|
|
// }
|
|
if ifaceDelta { // if a change caused an ifacedelta we need to notify the server to update the peers
|
|
doneErr := publishSignal(&nodeCfg, ncutils.DONE)
|
|
if doneErr != nil {
|
|
logger.Log(0, "network:", nodeCfg.Node.Network, "could not notify server to update peers after interface change")
|
|
} else {
|
|
logger.Log(0, "network:", nodeCfg.Node.Network, "signalled finished interface update to server")
|
|
}
|
|
} else if hubChange {
|
|
doneErr := publishSignal(&nodeCfg, ncutils.DONE)
|
|
if doneErr != nil {
|
|
logger.Log(0, "network:", nodeCfg.Node.Network, "could not notify server to update peers after hub change")
|
|
} else {
|
|
logger.Log(0, "network:", nodeCfg.Node.Network, "signalled finished hub update to server")
|
|
}
|
|
}
|
|
//deal with DNS
|
|
if newNode.DNSOn != "yes" && shouldDNSChange && nodeCfg.Node.Interface != "" {
|
|
logger.Log(0, "network:", nodeCfg.Node.Network, "settng DNS off")
|
|
if err := removeHostDNS(nodeCfg.Node.Interface, ncutils.IsWindows()); err != nil {
|
|
logger.Log(0, "network:", nodeCfg.Node.Network, "error removing netmaker profile from /etc/hosts "+err.Error())
|
|
}
|
|
// _, err := ncutils.RunCmd("/usr/bin/resolvectl revert "+nodeCfg.Node.Interface, true)
|
|
// if err != nil {
|
|
// logger.Log(0, "error applying dns" + err.Error())
|
|
// }
|
|
}
|
|
_ = UpdateLocalListenPort(&nodeCfg)
|
|
}
|
|
|
|
// UpdatePeers -- mqtt message handler for peers/<Network>/<NodeID> topic
|
|
func UpdatePeers(client mqtt.Client, msg mqtt.Message) {
|
|
var peerUpdate models.PeerUpdate
|
|
var network = parseNetworkFromTopic(msg.Topic())
|
|
var cfg = config.ClientConfig{}
|
|
cfg.Network = network
|
|
cfg.ReadConfig()
|
|
|
|
data, dataErr := decryptMsg(&cfg, msg.Payload())
|
|
if dataErr != nil {
|
|
return
|
|
}
|
|
err := json.Unmarshal([]byte(data), &peerUpdate)
|
|
if err != nil {
|
|
logger.Log(0, "error unmarshalling peer data")
|
|
return
|
|
}
|
|
// see if cached hit, if so skip
|
|
var currentMessage = read(peerUpdate.Network, lastPeerUpdate)
|
|
if currentMessage == string(data) {
|
|
return
|
|
}
|
|
insert(peerUpdate.Network, lastPeerUpdate, string(data))
|
|
// check version
|
|
if peerUpdate.ServerVersion != ncutils.Version {
|
|
logger.Log(0, "server/client version mismatch server: ", peerUpdate.ServerVersion, " client: ", ncutils.Version)
|
|
}
|
|
if peerUpdate.ServerVersion != cfg.Server.Version {
|
|
logger.Log(1, "updating server version")
|
|
cfg.Server.Version = peerUpdate.ServerVersion
|
|
config.Write(&cfg, cfg.Network)
|
|
}
|
|
file := ncutils.GetNetclientPathSpecific() + cfg.Node.Interface + ".conf"
|
|
internetGateway, err := wireguard.UpdateWgPeers(file, peerUpdate.Peers)
|
|
if err != nil {
|
|
logger.Log(0, "error updating wireguard peers"+err.Error())
|
|
return
|
|
}
|
|
//check if internet gateway has changed
|
|
oldGateway, err := net.ResolveUDPAddr("udp", cfg.Node.InternetGateway)
|
|
|
|
// note: may want to remove second part (oldGateway == &net.UDPAddr{})
|
|
// since it's a pointer, will never be true
|
|
if err != nil || (oldGateway == &net.UDPAddr{}) {
|
|
oldGateway = nil
|
|
}
|
|
if (internetGateway == nil && oldGateway != nil) || (internetGateway != nil && internetGateway.String() != oldGateway.String()) {
|
|
cfg.Node.InternetGateway = internetGateway.String()
|
|
if err := config.ModNodeConfig(&cfg.Node); err != nil {
|
|
logger.Log(0, "failed to save internet gateway", err.Error())
|
|
}
|
|
if ncutils.IsWindows() {
|
|
wireguard.RemoveConfGraceful(cfg.Node.Interface)
|
|
}
|
|
if err := wireguard.ApplyConf(&cfg.Node, cfg.Node.Interface, file); err != nil {
|
|
logger.Log(0, "error applying internet gateway", err.Error())
|
|
}
|
|
UpdateLocalListenPort(&cfg)
|
|
return
|
|
}
|
|
queryAddr := cfg.Node.PrimaryAddress()
|
|
|
|
//err = wireguard.SyncWGQuickConf(cfg.Node.Interface, file)
|
|
var iface = cfg.Node.Interface
|
|
if ncutils.IsMac() {
|
|
iface, err = local.GetMacIface(queryAddr)
|
|
if err != nil {
|
|
logger.Log(0, "error retrieving mac iface: "+err.Error())
|
|
return
|
|
}
|
|
}
|
|
err = wireguard.SetPeers(iface, &cfg.Node, peerUpdate.Peers)
|
|
if err != nil {
|
|
logger.Log(0, "error syncing wg after peer update: "+err.Error())
|
|
return
|
|
}
|
|
logger.Log(0, "network:", cfg.Node.Network, "received peer update for node "+cfg.Node.Name+" "+cfg.Node.Network)
|
|
if cfg.Node.DNSOn == "yes" {
|
|
if err := setHostDNS(peerUpdate.DNS, cfg.Node.Interface, ncutils.IsWindows()); err != nil {
|
|
logger.Log(0, "network:", cfg.Node.Network, "error updating /etc/hosts "+err.Error())
|
|
return
|
|
}
|
|
} else {
|
|
if err := removeHostDNS(cfg.Node.Interface, ncutils.IsWindows()); err != nil {
|
|
logger.Log(0, "network:", cfg.Node.Network, "error removing profile from /etc/hosts "+err.Error())
|
|
return
|
|
}
|
|
}
|
|
_ = UpdateLocalListenPort(&cfg)
|
|
}
|
|
|
|
func setHostDNS(dns, iface string, windows bool) error {
|
|
etchosts := "/etc/hosts"
|
|
temp := os.TempDir()
|
|
lockfile := temp + "/netclient-lock"
|
|
if windows {
|
|
etchosts = "c:\\windows\\system32\\drivers\\etc\\hosts"
|
|
lockfile = temp + "\\netclient-lock"
|
|
}
|
|
if _, err := os.Stat(lockfile); !errors.Is(err, os.ErrNotExist) {
|
|
return errors.New("/etc/hosts file is locked .... aborting")
|
|
}
|
|
lock, err := os.Create(lockfile)
|
|
if err != nil {
|
|
return fmt.Errorf("could not create lock file %w", err)
|
|
}
|
|
lock.Close()
|
|
defer os.Remove(lockfile)
|
|
dnsdata := strings.NewReader(dns)
|
|
profile, err := parser.ParseProfile(dnsdata)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
hosts, err := file.NewFile(etchosts)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
profile.Name = strings.ToLower(iface)
|
|
profile.Status = types.Enabled
|
|
if err := hosts.ReplaceProfile(profile); err != nil {
|
|
return err
|
|
}
|
|
if err := hosts.Flush(); err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func removeHostDNS(iface string, windows bool) error {
|
|
etchosts := "/etc/hosts"
|
|
temp := os.TempDir()
|
|
lockfile := temp + "/netclient-lock"
|
|
if windows {
|
|
etchosts = "c:\\windows\\system32\\drivers\\etc\\hosts"
|
|
lockfile = temp + "\\netclient-lock"
|
|
}
|
|
if _, err := os.Stat(lockfile); !errors.Is(err, os.ErrNotExist) {
|
|
return errors.New("/etc/hosts file is locked .... aborting")
|
|
}
|
|
lock, err := os.Create(lockfile)
|
|
if err != nil {
|
|
return fmt.Errorf("could not create lock file %w", err)
|
|
}
|
|
lock.Close()
|
|
defer os.Remove(lockfile)
|
|
hosts, err := file.NewFile(etchosts)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if err := hosts.RemoveProfile(strings.ToLower(iface)); err != nil {
|
|
if err == types.ErrUnknownProfile {
|
|
return nil
|
|
}
|
|
return err
|
|
}
|
|
if err := hosts.Flush(); err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|