mirror of
https://github.com/gravitl/netmaker.git
synced 2024-09-25 17:56:05 +08:00
456 lines
11 KiB
Go
456 lines
11 KiB
Go
package wireguard
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import (
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"context"
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"crypto/tls"
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"encoding/json"
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"errors"
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"fmt"
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"io/ioutil"
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"log"
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"net"
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"os"
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"os/exec"
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"strconv"
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"strings"
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nodepb "github.com/gravitl/netmaker/grpc"
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"github.com/gravitl/netmaker/models"
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"github.com/gravitl/netmaker/netclient/auth"
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"github.com/gravitl/netmaker/netclient/config"
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"github.com/gravitl/netmaker/netclient/local"
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"github.com/gravitl/netmaker/netclient/server"
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"golang.zx2c4.com/wireguard/wgctrl"
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"golang.zx2c4.com/wireguard/wgctrl/wgtypes"
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"google.golang.org/grpc"
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"google.golang.org/grpc/credentials"
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"google.golang.org/grpc/metadata"
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//homedir "github.com/mitchellh/go-homedir"
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)
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func InitGRPCWireguard(client models.IntClient) error {
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key, err := wgtypes.ParseKey(client.PrivateKey)
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if err != nil {
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return err
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}
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serverkey, err := wgtypes.ParseKey(client.ServerKey)
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if err != nil {
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return err
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}
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serverport, err := strconv.Atoi(client.ServerWGPort)
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if err != nil {
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return err
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}
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wgclient, err := wgctrl.New()
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if err != nil {
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log.Fatalf("failed to open client: %v", err)
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}
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defer wgclient.Close()
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ifacename := "grpc-wg-001"
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if client.Address6 == "" && client.Address == "" {
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return errors.New("no address to configure")
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}
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currentiface, err := net.InterfaceByName(ifacename)
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if err != nil {
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_, err = local.RunCmd("ip link add dev " + ifacename + " type wireguard")
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if err != nil && !strings.Contains(err.Error(), "exists") {
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log.Println("Error creating interface")
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}
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}
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match := false
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match6 := false
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addrs, _ := currentiface.Addrs()
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//Add IPv4Address (make into separate function)
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for _, a := range addrs {
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if strings.Contains(a.String(), client.Address) {
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match = true
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}
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if strings.Contains(a.String(), client.Address6) {
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match6 = true
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}
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}
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if !match && client.Address != "" {
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_, err = local.RunCmd("ip address add dev " + ifacename + " " + client.Address + "/24")
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if err != nil {
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log.Println("Error adding ipv4 address")
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fmt.Println(err)
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}
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}
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if !match6 && client.Address6 != "" {
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_, err = local.RunCmd("ip address add dev" + ifacename + " " + client.Address6 + "/64")
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if err != nil {
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log.Println("Error adding ipv6 address")
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fmt.Println(err)
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}
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}
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var peers []wgtypes.PeerConfig
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var peeraddr = net.IPNet{
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IP: net.ParseIP(client.ServerPrivateAddress),
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Mask: net.CIDRMask(32, 32),
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}
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var allowedips []net.IPNet
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allowedips = append(allowedips, peeraddr)
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net.ParseIP(client.ServerPublicEndpoint)
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peer := wgtypes.PeerConfig{
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PublicKey: serverkey,
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Endpoint: &net.UDPAddr{
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IP: net.ParseIP(client.ServerPublicEndpoint),
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Port: serverport,
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},
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ReplaceAllowedIPs: true,
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AllowedIPs: allowedips,
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}
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peers = append(peers, peer)
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conf := wgtypes.Config{
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PrivateKey: &key,
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ReplacePeers: true,
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Peers: peers,
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}
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_, err = wgclient.Device(ifacename)
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if err != nil {
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if os.IsNotExist(err) {
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log.Println("Device does not exist: ")
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log.Println(err)
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} else {
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return err
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}
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}
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err = wgclient.ConfigureDevice(ifacename, conf)
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if err != nil {
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if os.IsNotExist(err) {
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log.Println("Device does not exist: ")
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log.Println(err)
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} else {
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log.Printf("This is inconvenient: %v", err)
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}
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}
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_, err = local.RunCmd("ip link set up dev " + ifacename)
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_, err = local.RunCmd("ip link set down dev " + ifacename)
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if err != nil {
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return err
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}
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return err
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}
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func InitWireguard(node *models.Node, privkey string, peers []wgtypes.PeerConfig, hasGateway bool, gateways []string) error {
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ipExec, err := exec.LookPath("ip")
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if err != nil {
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return err
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}
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key, err := wgtypes.ParseKey(privkey)
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if err != nil {
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return err
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}
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wgclient, err := wgctrl.New()
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if err != nil {
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return err
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}
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modcfg, err := config.ReadConfig(node.Network)
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if err != nil {
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return err
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}
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nodecfg := modcfg.Node
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servercfg := modcfg.Server
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if err != nil {
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log.Fatalf("failed to open client: %v", err)
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}
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defer wgclient.Close()
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ifacename := node.Interface
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if nodecfg.Interface != "" {
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ifacename = nodecfg.Interface
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} else if node.Interface != "" {
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ifacename = node.Interface
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} else {
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log.Fatal("no interface to configure")
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}
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if node.Address == "" {
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log.Fatal("no address to configure")
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}
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nameserver := servercfg.CoreDNSAddr
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network := node.Network
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if nodecfg.Network != "" {
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network = nodecfg.Network
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} else if node.Network != "" {
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network = node.Network
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}
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_, delErr := local.RunCmd("ip link delete dev " + ifacename)
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_, addLinkErr := local.RunCmd(ipExec + " link add dev " + ifacename + " type wireguard")
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_, addErr := local.RunCmd(ipExec + " address add dev " + ifacename + " " + node.Address + "/24")
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if delErr != nil {
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log.Println(delErr)
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}
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if addLinkErr != nil {
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log.Println(addLinkErr)
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}
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if addErr != nil {
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log.Println(addErr)
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}
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var nodeport int
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nodeport = int(node.ListenPort)
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conf := wgtypes.Config{}
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if nodecfg.UDPHolePunch == "yes" && nodecfg.Name != "netmaker" {
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conf = wgtypes.Config{
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PrivateKey: &key,
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ReplacePeers: true,
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Peers: peers,
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}
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} else {
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conf = wgtypes.Config{
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PrivateKey: &key,
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ListenPort: &nodeport,
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ReplacePeers: true,
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Peers: peers,
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}
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}
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_, err = wgclient.Device(ifacename)
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if err != nil {
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if os.IsNotExist(err) {
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fmt.Println("Device does not exist: ")
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fmt.Println(err)
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} else {
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log.Fatalf("Unknown config error: %v", err)
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}
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}
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err = wgclient.ConfigureDevice(ifacename, conf)
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if err != nil {
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if os.IsNotExist(err) {
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fmt.Println("Device does not exist: ")
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fmt.Println(err)
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} else {
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fmt.Printf("This is inconvenient: %v", err)
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}
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}
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//=========DNS Setup==========\\
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if nodecfg.DNSOn == "yes" {
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_ = local.UpdateDNS(ifacename, network, nameserver)
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}
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//=========End DNS Setup=======\\
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cmdIPLinkUp := &exec.Cmd{
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Path: ipExec,
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Args: []string{ipExec, "link", "set", "up", "dev", ifacename},
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Stdout: os.Stdout,
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Stderr: os.Stdout,
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}
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cmdIPLinkDown := &exec.Cmd{
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Path: ipExec,
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Args: []string{ipExec, "link", "set", "down", "dev", ifacename},
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Stdout: os.Stdout,
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Stderr: os.Stdout,
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}
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err = cmdIPLinkDown.Run()
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if nodecfg.PostDown != "" {
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runcmds := strings.Split(nodecfg.PostDown, "; ")
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err = local.RunCmds(runcmds)
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if err != nil {
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fmt.Println("Error encountered running PostDown: " + err.Error())
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}
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}
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err = cmdIPLinkUp.Run()
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if err != nil {
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return err
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}
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if nodecfg.PostUp != "" {
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runcmds := strings.Split(nodecfg.PostUp, "; ")
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err = local.RunCmds(runcmds)
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if err != nil {
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fmt.Println("Error encountered running PostUp: " + err.Error())
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}
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}
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if hasGateway {
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for _, gateway := range gateways {
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out, err := local.RunCmd(ipExec + " -4 route add " + gateway + " dev " + ifacename)
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fmt.Println(string(out))
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if err != nil {
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fmt.Println("Error encountered adding gateway: " + err.Error())
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}
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}
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}
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if node.Address6 != "" && node.IsDualStack == "yes" {
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fmt.Println("Adding address: " + node.Address6)
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out, err := local.RunCmd(ipExec + " address add dev " + ifacename + " " + node.Address6 + "/64")
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if err != nil {
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fmt.Println(out)
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fmt.Println("Error encountered adding ipv6: " + err.Error())
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}
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}
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return err
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}
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func SetWGKeyConfig(network string, serveraddr string) error {
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ctx := context.Background()
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var header metadata.MD
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cfg, err := config.ReadConfig(network)
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if err != nil {
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return err
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}
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var wcclient nodepb.NodeServiceClient
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var requestOpts grpc.DialOption
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requestOpts = grpc.WithInsecure()
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if cfg.Server.GRPCSSL == "on" {
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h2creds := credentials.NewTLS(&tls.Config{NextProtos: []string{"h2"}})
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requestOpts = grpc.WithTransportCredentials(h2creds)
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}
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conn, err := grpc.Dial(serveraddr, requestOpts)
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if err != nil {
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fmt.Printf("Cant dial GRPC server: %v", err)
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return err
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}
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wcclient = nodepb.NewNodeServiceClient(conn)
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ctx, err = auth.SetJWT(wcclient, network)
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if err != nil {
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fmt.Printf("Failed to authenticate: %v", err)
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return err
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}
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node := config.GetNode(network)
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privatekey, err := wgtypes.GeneratePrivateKey()
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if err != nil {
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return err
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}
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privkeystring := privatekey.String()
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publickey := privatekey.PublicKey()
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node.PublicKey = publickey.String()
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err = StorePrivKey(privkeystring, network)
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if err != nil {
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return err
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}
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if node.Action == models.NODE_UPDATE_KEY {
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node.Action = models.NODE_NOOP
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}
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err = config.ModConfig(&node)
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if err != nil {
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return err
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}
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postnode := config.GetNode(network)
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nodeData, err := json.Marshal(&postnode)
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if err != nil {
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return err
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}
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req := &nodepb.Object{
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Data: string(nodeData),
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Type: nodepb.NODE_TYPE,
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}
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_, err = wcclient.UpdateNode(ctx, req, grpc.Header(&header))
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if err != nil {
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return err
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}
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err = SetWGConfig(network, false)
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if err != nil {
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return err
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}
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return err
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}
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func SetWGConfig(network string, peerupdate bool) error {
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cfg, err := config.ReadConfig(network)
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if err != nil {
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return err
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}
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servercfg := cfg.Server
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nodecfg := cfg.Node
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node := config.GetNode(network)
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peers, hasGateway, gateways, err := server.GetPeers(node.MacAddress, nodecfg.Network, servercfg.GRPCAddress, node.IsDualStack == "yes", node.IsIngressGateway == "yes")
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if err != nil {
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return err
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}
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privkey, err := RetrievePrivKey(network)
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if err != nil {
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return err
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}
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if peerupdate {
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SetPeers(node.Interface, node.PersistentKeepalive, peers)
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} else {
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err = InitWireguard(&node, privkey, peers, hasGateway, gateways)
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}
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if err != nil {
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return err
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}
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return err
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}
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func SetPeers(iface string, keepalive int32, peers []wgtypes.PeerConfig) {
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client, err := wgctrl.New()
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if err != nil {
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log.Println("failed to start wgctrl")
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return
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}
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device, err := client.Device(iface)
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if err != nil {
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log.Println("failed to parse interface")
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return
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}
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for _, peer := range peers {
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for _, currentPeer := range device.Peers {
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if currentPeer.AllowedIPs[0].String() == peer.AllowedIPs[0].String() &&
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currentPeer.PublicKey.String() == peer.PublicKey.String() {
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_, err := local.RunCmd("wg set " + iface + " peer " + currentPeer.PublicKey.String() + " delete")
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if err != nil {
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log.Println("error setting peer", peer.Endpoint.String())
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}
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}
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}
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udpendpoint := peer.Endpoint.IP.String() + ":" + peer.Endpoint.IP.String()
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var allowedips string
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var iparr []string
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for _, ipaddr := range peer.AllowedIPs {
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iparr = append(iparr, ipaddr.String())
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}
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allowedips = strings.Join(iparr, ",")
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_, err = local.RunCmd("wg set " + iface + " peer " + peer.PublicKey.String() +
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" endpoint " + udpendpoint +
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" persistent-keepalive " + string(keepalive) +
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" allowed-ips " + allowedips)
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if err != nil {
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log.Println("error setting peer", peer.Endpoint.String())
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}
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}
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}
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func StorePrivKey(key string, network string) error {
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d1 := []byte(key)
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err := ioutil.WriteFile("/etc/netclient/wgkey-"+network, d1, 0644)
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return err
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}
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func RetrievePrivKey(network string) (string, error) {
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dat, err := ioutil.ReadFile("/etc/netclient/wgkey-" + network)
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return string(dat), err
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}
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