mirror of
https://github.com/juanfont/headscale.git
synced 2024-11-27 12:05:26 +00:00
325 lines
8.4 KiB
Go
325 lines
8.4 KiB
Go
package headscale
|
|
|
|
import (
|
|
"encoding/binary"
|
|
"encoding/json"
|
|
"fmt"
|
|
"io"
|
|
"io/ioutil"
|
|
"log"
|
|
"net/http"
|
|
"time"
|
|
|
|
"github.com/gin-gonic/gin"
|
|
"github.com/jinzhu/gorm"
|
|
"github.com/jinzhu/gorm/dialects/postgres"
|
|
"github.com/klauspost/compress/zstd"
|
|
"inet.af/netaddr"
|
|
"tailscale.com/tailcfg"
|
|
"tailscale.com/wgengine/wgcfg"
|
|
)
|
|
|
|
func (h *Headscale) KeyHandler(c *gin.Context) {
|
|
c.Data(200, "text/plain; charset=utf-8", []byte(h.publicKey.HexString()))
|
|
}
|
|
|
|
func (h *Headscale) RegistrationHandler(c *gin.Context) {
|
|
body, _ := ioutil.ReadAll(c.Request.Body)
|
|
mKeyStr := c.Param("id")
|
|
mKey, err := wgcfg.ParseHexKey(mKeyStr)
|
|
if err != nil {
|
|
log.Printf("Cannot parse machine key: %s", err)
|
|
c.String(http.StatusInternalServerError, "Sad!")
|
|
return
|
|
}
|
|
req := tailcfg.RegisterRequest{}
|
|
err = decode(body, &req, &mKey, h.privateKey)
|
|
if err != nil {
|
|
log.Printf("Cannot decode message: %s", err)
|
|
c.String(http.StatusInternalServerError, "Very sad!")
|
|
return
|
|
}
|
|
db, err := h.db()
|
|
if err != nil {
|
|
log.Printf("Cannot open DB: %s", err)
|
|
c.String(http.StatusInternalServerError, ":(")
|
|
return
|
|
}
|
|
defer db.Close()
|
|
var m Machine
|
|
resp := tailcfg.RegisterResponse{}
|
|
|
|
if db.First(&m, "machine_key = ?", mKey.HexString()).RecordNotFound() {
|
|
log.Println("New Machine!")
|
|
h.handleNewServer(c, db, mKey, req)
|
|
return
|
|
}
|
|
|
|
// We do have the updated key!
|
|
if m.NodeKey == wgcfg.Key(req.NodeKey).HexString() {
|
|
if m.Registered {
|
|
log.Println("Registered and we have the updated key! Lets move to map")
|
|
resp.AuthURL = ""
|
|
respBody, err := encode(resp, &mKey, h.privateKey)
|
|
if err != nil {
|
|
log.Printf("Cannot encode message: %s", err)
|
|
c.String(http.StatusInternalServerError, "Extremely sad!")
|
|
return
|
|
}
|
|
c.Data(200, "application/json; charset=utf-8", respBody)
|
|
return
|
|
}
|
|
|
|
log.Println("Hey! Not registered. Not asking for key rotation. Send a passive-agressive authurl to register")
|
|
resp.AuthURL = fmt.Sprintf("%s/register?key=%s",
|
|
h.cfg.ServerURL, mKey.HexString())
|
|
respBody, err := encode(resp, &mKey, h.privateKey)
|
|
if err != nil {
|
|
log.Printf("Cannot encode message: %s", err)
|
|
c.String(http.StatusInternalServerError, "Extremely sad!")
|
|
return
|
|
}
|
|
c.Data(200, "application/json; charset=utf-8", respBody)
|
|
return
|
|
|
|
}
|
|
|
|
// We dont have the updated key in the DB. Lets try with the old one.
|
|
if m.NodeKey == wgcfg.Key(req.OldNodeKey).HexString() {
|
|
log.Println("Key rotation!")
|
|
m.NodeKey = wgcfg.Key(req.NodeKey).HexString()
|
|
db.Save(&m)
|
|
resp.AuthURL = ""
|
|
respBody, err := encode(resp, &mKey, h.privateKey)
|
|
if err != nil {
|
|
log.Printf("Cannot encode message: %s", err)
|
|
c.String(http.StatusInternalServerError, "Extremely sad!")
|
|
return
|
|
}
|
|
c.Data(200, "application/json; charset=utf-8", respBody)
|
|
return
|
|
}
|
|
|
|
log.Println("We dont know anything about the new key. WTF")
|
|
}
|
|
|
|
func (h *Headscale) PollNetMapHandler(c *gin.Context) {
|
|
body, _ := ioutil.ReadAll(c.Request.Body)
|
|
mKeyStr := c.Param("id")
|
|
mKey, err := wgcfg.ParseHexKey(mKeyStr)
|
|
if err != nil {
|
|
log.Printf("Cannot parse client key: %s", err)
|
|
c.String(http.StatusOK, "Sad!")
|
|
return
|
|
}
|
|
req := tailcfg.MapRequest{}
|
|
err = decode(body, &req, &mKey, h.privateKey)
|
|
if err != nil {
|
|
log.Printf("Cannot decode message: %s", err)
|
|
c.String(http.StatusOK, "Very sad!")
|
|
// return
|
|
}
|
|
|
|
db, err := h.db()
|
|
if err != nil {
|
|
log.Printf("Cannot open DB: %s", err)
|
|
c.String(http.StatusInternalServerError, ":(")
|
|
return
|
|
}
|
|
var m Machine
|
|
if db.First(&m, "machine_key = ?", mKey.HexString()).RecordNotFound() {
|
|
log.Printf("Cannot encode message: %s", err)
|
|
c.String(http.StatusOK, "Extremely sad!")
|
|
return
|
|
}
|
|
|
|
endpoints, _ := json.Marshal(req.Endpoints)
|
|
hostinfo, _ := json.Marshal(req.Hostinfo)
|
|
m.Endpoints = postgres.Jsonb{RawMessage: json.RawMessage(endpoints)}
|
|
m.HostInfo = postgres.Jsonb{RawMessage: json.RawMessage(hostinfo)}
|
|
now := time.Now().UTC()
|
|
m.LastSeen = &now
|
|
db.Save(&m)
|
|
db.Close()
|
|
|
|
chanStream := make(chan []byte, 1)
|
|
go func() {
|
|
defer close(chanStream)
|
|
|
|
data, err := h.getMapResponse(mKey, req, m)
|
|
if err != nil {
|
|
c.String(http.StatusInternalServerError, ":(")
|
|
return
|
|
}
|
|
|
|
//send initial dump
|
|
chanStream <- *data
|
|
for {
|
|
|
|
data, err := h.getMapKeepAliveResponse(mKey, req, m)
|
|
if err != nil {
|
|
c.String(http.StatusInternalServerError, ":(")
|
|
return
|
|
}
|
|
chanStream <- *data
|
|
// keep the node entertained
|
|
time.Sleep(time.Second * 180)
|
|
break
|
|
}
|
|
|
|
}()
|
|
c.Stream(func(w io.Writer) bool {
|
|
if msg, ok := <-chanStream; ok {
|
|
log.Printf("🦀 Sending data to %s: %d bytes", c.Request.RemoteAddr, len(msg))
|
|
w.Write(msg)
|
|
return true
|
|
} else {
|
|
log.Printf("🦄 Closing connection to %s", c.Request.RemoteAddr)
|
|
c.AbortWithStatus(200)
|
|
return false
|
|
}
|
|
})
|
|
|
|
}
|
|
|
|
func (h *Headscale) getMapResponse(mKey wgcfg.Key, req tailcfg.MapRequest, m Machine) (*[]byte, error) {
|
|
node, err := m.toNode()
|
|
if err != nil {
|
|
log.Printf("Cannot convert to node: %s", err)
|
|
return nil, err
|
|
}
|
|
peers, err := h.getPeers(m)
|
|
if err != nil {
|
|
log.Printf("Cannot fetch peers: %s", err)
|
|
return nil, err
|
|
}
|
|
resp := tailcfg.MapResponse{
|
|
KeepAlive: false,
|
|
Node: node,
|
|
Peers: *peers,
|
|
DNS: []netaddr.IP{},
|
|
SearchPaths: []string{},
|
|
Domain: "foobar@example.com",
|
|
PacketFilter: tailcfg.FilterAllowAll,
|
|
DERPMap: &tailcfg.DERPMap{},
|
|
UserProfiles: []tailcfg.UserProfile{},
|
|
Roles: []tailcfg.Role{}}
|
|
|
|
var respBody []byte
|
|
if req.Compress == "zstd" {
|
|
src, _ := json.Marshal(resp)
|
|
encoder, _ := zstd.NewWriter(nil)
|
|
srcCompressed := encoder.EncodeAll(src, nil)
|
|
respBody, err = encodeMsg(srcCompressed, &mKey, h.privateKey)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
} else {
|
|
respBody, err = encode(resp, &mKey, h.privateKey)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
|
|
// declare the incoming size on the first 4 bytes
|
|
data := make([]byte, 4)
|
|
binary.LittleEndian.PutUint32(data, uint32(len(respBody)))
|
|
data = append(data, respBody...)
|
|
return &data, nil
|
|
}
|
|
|
|
func (h *Headscale) getMapKeepAliveResponse(mKey wgcfg.Key, req tailcfg.MapRequest, m Machine) (*[]byte, error) {
|
|
resp := tailcfg.MapResponse{
|
|
KeepAlive: true,
|
|
}
|
|
var respBody []byte
|
|
var err error
|
|
if req.Compress == "zstd" {
|
|
src, _ := json.Marshal(resp)
|
|
encoder, _ := zstd.NewWriter(nil)
|
|
srcCompressed := encoder.EncodeAll(src, nil)
|
|
respBody, err = encodeMsg(srcCompressed, &mKey, h.privateKey)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
} else {
|
|
respBody, err = encode(resp, &mKey, h.privateKey)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
data := make([]byte, 4)
|
|
binary.LittleEndian.PutUint32(data, uint32(len(respBody)))
|
|
data = append(data, respBody...)
|
|
return &data, nil
|
|
}
|
|
|
|
// RegisterWebAPI attaches the machine to a user or team.
|
|
// Currently this is a rather temp implementation, as it just registers it.
|
|
func (h *Headscale) RegisterWebAPI(c *gin.Context) {
|
|
mKeyStr := c.Query("key")
|
|
if mKeyStr == "" {
|
|
c.String(http.StatusBadRequest, "Wrong params")
|
|
return
|
|
}
|
|
mKey, err := wgcfg.ParseHexKey(mKeyStr)
|
|
if err != nil {
|
|
log.Printf("Cannot parse client key: %s", err)
|
|
c.String(http.StatusInternalServerError, "Sad!")
|
|
return
|
|
}
|
|
db, err := h.db()
|
|
if err != nil {
|
|
log.Printf("Cannot open DB: %s", err)
|
|
c.String(http.StatusInternalServerError, ":(")
|
|
return
|
|
}
|
|
defer db.Close()
|
|
m := Machine{}
|
|
if db.First(&m, "machine_key = ?", mKey.HexString()).RecordNotFound() {
|
|
log.Printf("Cannot find machine with machine key: %s", mKey.Base64())
|
|
c.String(http.StatusNotFound, "Sad!")
|
|
return
|
|
}
|
|
|
|
if !m.isAlreadyRegistered() {
|
|
ip, err := h.getAvailableIP()
|
|
if err != nil {
|
|
log.Println(err)
|
|
c.String(http.StatusInternalServerError, "Upsy dupsy")
|
|
return
|
|
}
|
|
m.IPAddress = ip.String()
|
|
m.Registered = true // very naive 😱
|
|
db.Save(&m)
|
|
|
|
c.JSON(http.StatusOK, gin.H{"msg": "Ook"})
|
|
return
|
|
}
|
|
c.JSON(http.StatusOK, gin.H{"msg": "Eek"})
|
|
}
|
|
|
|
func (h *Headscale) handleNewServer(c *gin.Context, db *gorm.DB, idKey wgcfg.Key, req tailcfg.RegisterRequest) {
|
|
mNew := Machine{
|
|
MachineKey: idKey.HexString(),
|
|
NodeKey: wgcfg.Key(req.NodeKey).HexString(),
|
|
Expiry: &req.Expiry,
|
|
}
|
|
if err := db.Create(&mNew).Error; err != nil {
|
|
log.Printf("Could not create row: %s", err)
|
|
return
|
|
}
|
|
resp := tailcfg.RegisterResponse{
|
|
AuthURL: fmt.Sprintf("%s/register?key=%s",
|
|
h.cfg.ServerURL, idKey.HexString()),
|
|
}
|
|
|
|
respBody, err := encode(resp, &idKey, h.privateKey)
|
|
if err != nil {
|
|
log.Printf("Cannot encode message: %s", err)
|
|
c.String(http.StatusInternalServerError, "Extremely sad!")
|
|
return
|
|
}
|
|
c.Data(200, "application/json; charset=utf-8", respBody)
|
|
}
|