mirror of
https://github.com/juanfont/headscale.git
synced 2024-12-25 21:55:52 -05:00
41f6740ddd
tests for that feature. Other fixes: clean up a few typos in comments. Fix a bug that caused the tests to run four times each. Be more consistent in the use of log rather than fmt to print errors and notices.
436 lines
12 KiB
Go
436 lines
12 KiB
Go
package headscale
|
|
|
|
import (
|
|
"encoding/binary"
|
|
"encoding/json"
|
|
"fmt"
|
|
"io"
|
|
"log"
|
|
"net/http"
|
|
"time"
|
|
|
|
"github.com/gin-gonic/gin"
|
|
"github.com/jinzhu/gorm"
|
|
"github.com/klauspost/compress/zstd"
|
|
"gorm.io/datatypes"
|
|
"inet.af/netaddr"
|
|
"tailscale.com/tailcfg"
|
|
"tailscale.com/wgengine/wgcfg"
|
|
)
|
|
|
|
// KeyHandler provides the Headscale pub key
|
|
// Listens in /key
|
|
func (h *Headscale) KeyHandler(c *gin.Context) {
|
|
c.Data(200, "text/plain; charset=utf-8", []byte(h.publicKey.HexString()))
|
|
}
|
|
|
|
// RegisterWebAPI shows a simple message in the browser to point to the CLI
|
|
// Listens in /register
|
|
func (h *Headscale) RegisterWebAPI(c *gin.Context) {
|
|
mKeyStr := c.Query("key")
|
|
if mKeyStr == "" {
|
|
c.String(http.StatusBadRequest, "Wrong params")
|
|
return
|
|
}
|
|
|
|
// spew.Dump(c.Params)
|
|
|
|
c.Data(http.StatusOK, "text/html; charset=utf-8", []byte(fmt.Sprintf(`
|
|
<html>
|
|
<body>
|
|
<h1>headscale</h1>
|
|
<p>
|
|
Run the command below in the headscale server to add this machine to your network:
|
|
</p>
|
|
|
|
<p>
|
|
<code>
|
|
<b>headscale -n NAMESPACE node register %s</b>
|
|
</code>
|
|
</p>
|
|
|
|
</body>
|
|
</html>
|
|
|
|
`, mKeyStr)))
|
|
}
|
|
|
|
// RegistrationHandler handles the actual registration process of a machine
|
|
// Endpoint /machine/:id
|
|
func (h *Headscale) RegistrationHandler(c *gin.Context) {
|
|
body, _ := io.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.Printf("[%s] Client is registered and we have the current key. All clear to /map\n", m.Name)
|
|
resp.AuthURL = ""
|
|
resp.User = *m.Namespace.toUser()
|
|
resp.MachineAuthorized = true
|
|
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-aggressive 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 = ""
|
|
resp.User = *m.Namespace.toUser()
|
|
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")
|
|
// spew.Dump(req)
|
|
}
|
|
|
|
// PollNetMapHandler takes care of /machine/:id/map
|
|
//
|
|
// This is the busiest endpoint, as it keeps the HTTP long poll that updates
|
|
// the clients when something in the network changes.
|
|
//
|
|
// The clients POST stuff like HostInfo and their Endpoints here, but
|
|
// only after their first request (marked with the ReadOnly field).
|
|
//
|
|
// At this moment the updates are sent in a quite horrendous way, but they kinda work.
|
|
func (h *Headscale) PollNetMapHandler(c *gin.Context) {
|
|
body, _ := io.ReadAll(c.Request.Body)
|
|
mKeyStr := c.Param("id")
|
|
mKey, err := wgcfg.ParseHexKey(mKeyStr)
|
|
if err != nil {
|
|
log.Printf("Cannot parse client key: %s", err)
|
|
return
|
|
}
|
|
req := tailcfg.MapRequest{}
|
|
err = decode(body, &req, &mKey, h.privateKey)
|
|
if err != nil {
|
|
log.Printf("Cannot decode message: %s", err)
|
|
return
|
|
}
|
|
|
|
db, err := h.db()
|
|
if err != nil {
|
|
log.Printf("Cannot open DB: %s", err)
|
|
return
|
|
}
|
|
defer db.Close()
|
|
var m Machine
|
|
if db.First(&m, "machine_key = ?", mKey.HexString()).RecordNotFound() {
|
|
log.Printf("Ignoring request, cannot find machine with key %s", mKey.HexString())
|
|
return
|
|
}
|
|
|
|
hostinfo, _ := json.Marshal(req.Hostinfo)
|
|
m.Name = req.Hostinfo.Hostname
|
|
m.HostInfo = datatypes.JSON(hostinfo)
|
|
m.DiscoKey = wgcfg.Key(req.DiscoKey).HexString()
|
|
now := time.Now().UTC()
|
|
|
|
// From Tailscale client:
|
|
//
|
|
// ReadOnly is whether the client just wants to fetch the MapResponse,
|
|
// without updating their Endpoints. The Endpoints field will be ignored and
|
|
// LastSeen will not be updated and peers will not be notified of changes.
|
|
//
|
|
// The intended use is for clients to discover the DERP map at start-up
|
|
// before their first real endpoint update.
|
|
if !req.ReadOnly {
|
|
endpoints, _ := json.Marshal(req.Endpoints)
|
|
m.Endpoints = datatypes.JSON(endpoints)
|
|
m.LastSeen = &now
|
|
}
|
|
db.Save(&m)
|
|
|
|
pollData := make(chan []byte, 1)
|
|
update := make(chan []byte, 1)
|
|
cancelKeepAlive := make(chan []byte, 1)
|
|
defer close(pollData)
|
|
defer close(update)
|
|
defer close(cancelKeepAlive)
|
|
h.pollMu.Lock()
|
|
h.clientsPolling[m.ID] = update
|
|
h.pollMu.Unlock()
|
|
|
|
data, err := h.getMapResponse(mKey, req, m)
|
|
if err != nil {
|
|
c.String(http.StatusInternalServerError, ":(")
|
|
return
|
|
}
|
|
|
|
log.Printf("[%s] sending initial map", m.Name)
|
|
pollData <- *data
|
|
|
|
// We update our peers if the client is not sending ReadOnly in the MapRequest
|
|
// so we don't distribute its initial request (it comes with
|
|
// empty endpoints to peers)
|
|
if !req.ReadOnly {
|
|
peers, _ := h.getPeers(m)
|
|
h.pollMu.Lock()
|
|
for _, p := range *peers {
|
|
log.Printf("[%s] notifying peer %s (%s)", m.Name, p.Name, p.Addresses[0])
|
|
if pUp, ok := h.clientsPolling[uint64(p.ID)]; ok {
|
|
pUp <- []byte{}
|
|
} else {
|
|
log.Printf("[%s] Peer %s does not appear to be polling", m.Name, p.Name)
|
|
}
|
|
}
|
|
h.pollMu.Unlock()
|
|
}
|
|
|
|
go h.keepAlive(cancelKeepAlive, pollData, mKey, req, m)
|
|
|
|
c.Stream(func(w io.Writer) bool {
|
|
select {
|
|
case data := <-pollData:
|
|
log.Printf("[%s] Sending data (%d bytes)", m.Name, len(data))
|
|
_, err := w.Write(data)
|
|
if err != nil {
|
|
log.Printf("[%s] 🤮 Cannot write data: %s", m.Name, err)
|
|
}
|
|
now := time.Now().UTC()
|
|
m.LastSeen = &now
|
|
db.Save(&m)
|
|
return true
|
|
|
|
case <-update:
|
|
log.Printf("[%s] Received a request for update", m.Name)
|
|
data, err := h.getMapResponse(mKey, req, m)
|
|
if err != nil {
|
|
log.Printf("[%s] 🤮 Cannot get the poll response: %s", m.Name, err)
|
|
}
|
|
_, err = w.Write(*data)
|
|
if err != nil {
|
|
log.Printf("[%s] 🤮 Cannot write the poll response: %s", m.Name, err)
|
|
}
|
|
return true
|
|
|
|
case <-c.Request.Context().Done():
|
|
log.Printf("[%s] 😥 The client has closed the connection", m.Name)
|
|
now := time.Now().UTC()
|
|
m.LastSeen = &now
|
|
db.Save(&m)
|
|
h.pollMu.Lock()
|
|
cancelKeepAlive <- []byte{}
|
|
delete(h.clientsPolling, m.ID)
|
|
h.pollMu.Unlock()
|
|
return false
|
|
|
|
}
|
|
})
|
|
}
|
|
|
|
func (h *Headscale) keepAlive(cancel chan []byte, pollData chan []byte, mKey wgcfg.Key, req tailcfg.MapRequest, m Machine) {
|
|
for {
|
|
select {
|
|
case <-cancel:
|
|
return
|
|
|
|
default:
|
|
h.pollMu.Lock()
|
|
data, err := h.getMapKeepAliveResponse(mKey, req, m)
|
|
if err != nil {
|
|
log.Printf("Error generating the keep alive msg: %s", err)
|
|
return
|
|
}
|
|
pollData <- *data
|
|
h.pollMu.Unlock()
|
|
time.Sleep(60 * time.Second)
|
|
}
|
|
}
|
|
}
|
|
|
|
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: h.cfg.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
|
|
}
|
|
}
|
|
// spew.Dump(resp)
|
|
// 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
|
|
}
|
|
|
|
func (h *Headscale) handleNewServer(c *gin.Context, db *gorm.DB, idKey wgcfg.Key, req tailcfg.RegisterRequest) {
|
|
m := Machine{
|
|
MachineKey: idKey.HexString(),
|
|
NodeKey: wgcfg.Key(req.NodeKey).HexString(),
|
|
Expiry: &req.Expiry,
|
|
Name: req.Hostinfo.Hostname,
|
|
}
|
|
if err := db.Create(&m).Error; err != nil {
|
|
log.Printf("Could not create row: %s", err)
|
|
return
|
|
}
|
|
|
|
resp := tailcfg.RegisterResponse{}
|
|
|
|
if req.Auth.AuthKey != "" {
|
|
pak, err := h.checkKeyValidity(req.Auth.AuthKey)
|
|
if err != nil {
|
|
resp.MachineAuthorized = false
|
|
respBody, err := encode(resp, &idKey, h.privateKey)
|
|
if err != nil {
|
|
log.Printf("Cannot encode message: %s", err)
|
|
c.String(http.StatusInternalServerError, "")
|
|
return
|
|
}
|
|
c.Data(200, "application/json; charset=utf-8", respBody)
|
|
return
|
|
}
|
|
ip, err := h.getAvailableIP()
|
|
if err != nil {
|
|
log.Println(err)
|
|
return
|
|
}
|
|
|
|
m.IPAddress = ip.String()
|
|
m.NamespaceID = pak.NamespaceID
|
|
m.AuthKeyID = uint(pak.ID)
|
|
m.RegisterMethod = "authKey"
|
|
m.Registered = true
|
|
db.Save(&m)
|
|
|
|
resp.MachineAuthorized = true
|
|
resp.User = *pak.Namespace.toUser()
|
|
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)
|
|
return
|
|
}
|
|
|
|
resp.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)
|
|
}
|