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mirror of https://github.com/juanfont/headscale.git synced 2024-12-20 19:09:07 +01:00

Initial commit

This commit is contained in:
Juan Font Alonso 2020-06-21 12:32:08 +02:00
parent ecf9c9b3db
commit 7198c8bd77
10 changed files with 1147 additions and 2 deletions

4
.gitignore vendored
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@ -13,3 +13,7 @@
# Dependency directories (remove the comment below to include it)
# vendor/
config.json
headscale
*.key

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@ -24,12 +24,19 @@ An open source implementation of the Tailscale coordination server.
POSTGRES_USER=foo -e POSTGRES_PASSWORD=bar -p 5432:5432 -d postgres
```
3. Run it (asuming you have renamed the config.json.example to config.json)
3. Sort some stuff up (headscale Wireguard keys & the config.json file)
```
wg genkey > private.key
wg pubkey < private.key > public.key
cp config.json.example config.json
```
4. Run it
```
./headcale
```
4. Add your first machine
5. Add your first machine
```
tailscale up -login-server YOUR_HEADSCALE_URL
```

63
app.go Normal file
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@ -0,0 +1,63 @@
package headscale
import (
"fmt"
"io/ioutil"
"github.com/gin-gonic/gin"
"github.com/tailscale/wireguard-go/wgcfg"
)
type Config struct {
ServerURL string
Addr string
PrivateKeyPath string
DBhost string
DBport int
DBname string
DBuser string
DBpass string
}
type Headscale struct {
cfg Config
dbString string
publicKey *wgcfg.Key
privateKey *wgcfg.PrivateKey
}
func NewHeadscale(cfg Config) (*Headscale, error) {
content, err := ioutil.ReadFile(cfg.PrivateKeyPath)
if err != nil {
return nil, err
}
privKey, err := wgcfg.ParsePrivateKey(string(content))
if err != nil {
return nil, err
}
pubKey := privKey.Public()
h := Headscale{
cfg: cfg,
dbString: fmt.Sprintf("host=%s port=%d dbname=%s user=%s password=%s sslmode=disable", cfg.DBhost,
cfg.DBport, cfg.DBname, cfg.DBuser, cfg.DBpass),
privateKey: privKey,
publicKey: &pubKey,
}
err = h.initDB()
if err != nil {
return nil, err
}
return &h, nil
}
func (h *Headscale) Serve() error {
r := gin.Default()
r.GET("/key", h.KeyHandler)
r.GET("/register", h.RegisterWebAPI)
r.POST("/machine/:id/map", h.PollNetMapHandler)
r.POST("/machine/:id", h.RegistrationHandler)
err := r.Run(h.cfg.Addr)
return err
}

11
config.json.example Normal file
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@ -0,0 +1,11 @@
{
"server_url": "http://192.168.1.12:8000",
"listen_addr": "0.0.0.0:8000",
"private_key_path": "private.key",
"public_key_path": "public.key",
"db_host": "localhost",
"db_port": 5432,
"db_name": "headscale",
"db_user": "foo",
"db_pass": "bar"
}

70
db.go Normal file
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@ -0,0 +1,70 @@
package headscale
import (
"errors"
"github.com/jinzhu/gorm"
_ "github.com/jinzhu/gorm/dialects/postgres"
)
const dbVersion = "1"
type KV struct {
Key string
Value string
}
func (h *Headscale) initDB() error {
db, err := gorm.Open("postgres", h.dbString)
if err != nil {
return err
}
db.Exec("create extension if not exists \"uuid-ossp\";")
db.AutoMigrate(&Machine{})
db.AutoMigrate(&KV{})
db.Close()
h.setValue("db_version", dbVersion)
return nil
}
func (h *Headscale) db() (*gorm.DB, error) {
db, err := gorm.Open("postgres", h.dbString)
if err != nil {
return nil, err
}
return db, nil
}
func (h *Headscale) getValue(key string) (string, error) {
db, err := h.db()
if err != nil {
return "", err
}
defer db.Close()
var row KV
if db.First(&row, "key = ?", key).RecordNotFound() {
return "", errors.New("not found")
}
return row.Value, nil
}
func (h *Headscale) setValue(key string, value string) error {
kv := KV{
Key: key,
Value: value,
}
db, err := h.db()
if err != nil {
return err
}
defer db.Close()
_, err = h.getValue(key)
if err == nil {
db.Model(&kv).Where("key = ?", key).Update("value", value)
return nil
}
db.Create(kv)
return nil
}

13
go.mod Normal file
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@ -0,0 +1,13 @@
module github.com/juanfont/headscale
go 1.14
require (
github.com/gin-gonic/gin v1.6.3
github.com/jinzhu/gorm v1.9.14
github.com/klauspost/compress v1.9.8
github.com/spf13/viper v1.7.0
github.com/tailscale/wireguard-go v0.0.0-20200615180905-687c10194779
golang.org/x/crypto v0.0.0-20200604202706-70a84ac30bf9
tailscale.com v0.99.1
)

408
go.sum Normal file
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@ -0,0 +1,408 @@
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github.com/tailscale/wireguard-go v0.0.0-20200615180905-687c10194779/go.mod h1:JPm5cTfu1K+qDFRbiHy0sOlHUylYQbpl356sdYFD8V4=
github.com/tcnksm/go-httpstat v0.2.0/go.mod h1:s3JVJFtQxtBEBC9dwcdTTXS9xFnM3SXAZwPG41aurT8=
github.com/tmc/grpc-websocket-proxy v0.0.0-20190109142713-0ad062ec5ee5/go.mod h1:ncp9v5uamzpCO7NfCPTXjqaC+bZgJeR0sMTm6dMHP7U=
github.com/toqueteos/webbrowser v1.2.0/go.mod h1:XWoZq4cyp9WeUeak7w7LXRUQf1F1ATJMir8RTqb4ayM=
github.com/ugorji/go v1.1.7 h1:/68gy2h+1mWMrwZFeD1kQialdSzAb432dtpeJ42ovdo=
github.com/ugorji/go v1.1.7/go.mod h1:kZn38zHttfInRq0xu/PH0az30d+z6vm202qpg1oXVMw=
github.com/ugorji/go/codec v1.1.7 h1:2SvQaVZ1ouYrrKKwoSk2pzd4A9evlKJb9oTL+OaLUSs=
github.com/ugorji/go/codec v1.1.7/go.mod h1:Ax+UKWsSmolVDwsd+7N3ZtXu+yMGCf907BLYF3GoBXY=
github.com/ulikunitz/xz v0.5.6/go.mod h1:2bypXElzHzzJZwzH67Y6wb67pO62Rzfn7BSiF4ABRW8=
github.com/xi2/xz v0.0.0-20171230120015-48954b6210f8/go.mod h1:HUYIGzjTL3rfEspMxjDjgmT5uz5wzYJKVo23qUhYTos=
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golang.org/x/crypto v0.0.0-20181029021203-45a5f77698d3/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
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golang.org/x/crypto v0.0.0-20190510104115-cbcb75029529/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
golang.org/x/crypto v0.0.0-20190605123033-f99c8df09eb5/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
golang.org/x/crypto v0.0.0-20191002192127-34f69633bfdc/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
golang.org/x/crypto v0.0.0-20191205180655-e7c4368fe9dd/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
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golang.org/x/lint v0.0.0-20190409202823-959b441ac422/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
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golang.org/x/mod v0.1.0/go.mod h1:0QHyrYULN0/3qlju5TqG8bIK38QM8yzMo5ekMj3DlcY=
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golang.org/x/net v0.0.0-20200202094626-16171245cfb2/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20200301022130-244492dfa37a/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20200324143707-d3edc9973b7e h1:3G+cUijn7XD+S4eJFddp53Pv7+slrESplyjG25HgL+k=
golang.org/x/net v0.0.0-20200324143707-d3edc9973b7e/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
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golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
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golang.org/x/oauth2 v0.0.0-20200107190931-bf48bf16ab8d h1:TzXSXBo42m9gQenoE3b9BGiEpg5IG2JkU5FkPIawgtw=
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golang.org/x/tools v0.0.0-20190312151545-0bb0c0a6e846/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
golang.org/x/tools v0.0.0-20190312170243-e65039ee4138/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
golang.org/x/tools v0.0.0-20190328211700-ab21143f2384/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
golang.org/x/tools v0.0.0-20190425150028-36563e24a262/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
golang.org/x/tools v0.0.0-20190506145303-2d16b83fe98c/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
golang.org/x/tools v0.0.0-20190606124116-d0a3d012864b/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc=
golang.org/x/tools v0.0.0-20190621195816-6e04913cbbac/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc=
golang.org/x/tools v0.0.0-20190628153133-6cdbf07be9d0/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc=
golang.org/x/tools v0.0.0-20190816200558-6889da9d5479/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
golang.org/x/tools v0.0.0-20190911174233-4f2ddba30aff/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
golang.org/x/tools v0.0.0-20191012152004-8de300cfc20a/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
golang.org/x/tools v0.0.0-20191112195655-aa38f8e97acc/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
google.golang.org/api v0.4.0/go.mod h1:8k5glujaEP+g9n7WNsDg8QP6cUVNI86fCNMcbazEtwE=
google.golang.org/api v0.7.0/go.mod h1:WtwebWUNSVBH/HAw79HIFXZNqEvBhG+Ra+ax0hx3E3M=
google.golang.org/api v0.8.0/go.mod h1:o4eAsZoiT+ibD93RtjEohWalFOjRDx6CVaqeizhEnKg=
google.golang.org/api v0.9.0/go.mod h1:o4eAsZoiT+ibD93RtjEohWalFOjRDx6CVaqeizhEnKg=
google.golang.org/api v0.13.0/go.mod h1:iLdEw5Ide6rF15KTC1Kkl0iskquN2gFfn9o9XIsbkAI=
google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
google.golang.org/appengine v1.5.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
google.golang.org/appengine v1.6.1/go.mod h1:i06prIuMbXzDqacNJfV5OdTW448YApPu5ww/cMBSeb0=
google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
google.golang.org/genproto v0.0.0-20190307195333-5fe7a883aa19/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
google.golang.org/genproto v0.0.0-20190418145605-e7d98fc518a7/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
google.golang.org/genproto v0.0.0-20190425155659-357c62f0e4bb/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
google.golang.org/genproto v0.0.0-20190502173448-54afdca5d873/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
google.golang.org/genproto v0.0.0-20190801165951-fa694d86fc64/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
google.golang.org/genproto v0.0.0-20190911173649-1774047e7e51/go.mod h1:IbNlFCBrqXvoKpeg0TB2l7cyZUmoaFKYIwrEpbDKLA8=
google.golang.org/genproto v0.0.0-20191108220845-16a3f7862a1a/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc=
google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
google.golang.org/grpc v1.21.1/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
gopkg.in/ini.v1 v1.51.0 h1:AQvPpx3LzTDM0AjnIRlVFwFFGC+npRopjZxLJj6gdno=
gopkg.in/ini.v1 v1.51.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
gopkg.in/resty.v1 v1.12.0/go.mod h1:mDo4pnntr5jdWRML875a/NmxYqAlA73dVijT2AXvQQo=
gopkg.in/yaml.v2 v2.0.0-20170812160011-eb3733d160e7/go.mod h1:JAlM8MvJe8wmxCU4Bli9HhUf9+ttbYbLASfIpnQbh74=
gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.2.7/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.2.8 h1:obN1ZagJSUGI0Ek/LBmuj4SNLPfIny3KsKFopxRdj10=
gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
inet.af/netaddr v0.0.0-20200513162223-787f13e36cbe/go.mod h1:qqYzz/2whtrbWJvt+DNWQyvekNN4ePQZcg2xc2/Yjww=
rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
rsc.io/goversion v1.2.0/go.mod h1:Eih9y/uIBS3ulggl7KNJ09xGSLcuNaLgmvvqa07sgfo=
tailscale.com v0.99.1 h1:+i98MHss4j5yPoM4JH6oQD7yaXaTmIgirbtiA9VZCJs=
tailscale.com v0.99.1/go.mod h1:vC1PaeQlGJGkjVkhoD3spdRDt/ZBQco6RkzQOnVHQoQ=

323
handlers.go Normal file
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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"
"github.com/tailscale/wireguard-go/wgcfg"
"tailscale.com/tailcfg"
)
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: []wgcfg.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)
}

125
machine.go Normal file
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package headscale
import (
"encoding/json"
"fmt"
"log"
"time"
"github.com/jinzhu/gorm/dialects/postgres"
"github.com/tailscale/wireguard-go/wgcfg"
"tailscale.com/tailcfg"
)
type Machine struct {
ID uint64 `gorm:"primary_key"`
MachineKey string `gorm:"type:varchar(64);unique_index"`
NodeKey string
IPAddress string
Registered bool // temp
LastSeen *time.Time
Expiry *time.Time
HostInfo postgres.Jsonb
Endpoints postgres.Jsonb
CreatedAt time.Time
UpdatedAt time.Time
DeletedAt *time.Time
}
// For the time being this method is rather naive
func (m Machine) isAlreadyRegistered() bool {
return m.Registered
}
func (m Machine) toNode() (*tailcfg.Node, error) {
nKey, err := wgcfg.ParseHexKey(m.NodeKey)
if err != nil {
return nil, err
}
mKey, err := wgcfg.ParseHexKey(m.MachineKey)
if err != nil {
return nil, err
}
addrs := []wgcfg.CIDR{}
allowedIPs := []wgcfg.CIDR{}
ip, err := wgcfg.ParseCIDR(fmt.Sprintf("%s/32", m.IPAddress))
if err != nil {
return nil, err
}
addrs = append(addrs, ip)
allowedIPs = append(allowedIPs, ip) // looks like the client expect this
endpoints := []string{}
be, err := m.Endpoints.MarshalJSON()
if err != nil {
return nil, err
}
err = json.Unmarshal(be, &endpoints)
if err != nil {
return nil, err
}
hostinfo := tailcfg.Hostinfo{}
hi, err := m.HostInfo.MarshalJSON()
if err != nil {
return nil, err
}
err = json.Unmarshal(hi, &hostinfo)
if err != nil {
return nil, err
}
n := tailcfg.Node{
ID: tailcfg.NodeID(m.ID), // this is the actual ID
Name: "",
User: 1,
Key: tailcfg.NodeKey(nKey),
KeyExpiry: *m.Expiry,
Machine: tailcfg.MachineKey(mKey),
Addresses: addrs,
AllowedIPs: allowedIPs,
Endpoints: endpoints,
// DERP: "127.3.3.40:4", // wtf?
Hostinfo: hostinfo,
Created: m.CreatedAt,
LastSeen: m.LastSeen,
KeepAlive: false,
MachineAuthorized: m.Registered,
}
// n.Key.MarshalText()
return &n, nil
}
func (h *Headscale) getPeers(m Machine) (*[]*tailcfg.Node, error) {
db, err := h.db()
if err != nil {
log.Printf("Cannot open DB: %s", err)
return nil, err
}
defer db.Close()
// Add user management here?
machines := []Machine{}
if err = db.Where("machine_key <> ?", m.MachineKey).Find(&machines).Error; err != nil {
log.Printf("Error accessing db: %s", err)
return nil, err
}
log.Printf("Found %d peers of %s", len(machines), m.MachineKey)
peers := []*tailcfg.Node{}
for _, mn := range machines {
peer, err := mn.toNode()
if err != nil {
return nil, err
}
peers = append(peers, peer)
}
return &peers, nil
}

121
utils.go Normal file
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// Codehere is mostly taken from github.com/tailscale/tailscale
// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package headscale
import (
"crypto/rand"
"encoding/binary"
"encoding/json"
"errors"
"fmt"
"io"
"net"
mathrand "math/rand"
"github.com/tailscale/wireguard-go/wgcfg"
"golang.org/x/crypto/nacl/box"
)
func decode(msg []byte, v interface{}, pubKey *wgcfg.Key, privKey *wgcfg.PrivateKey) error {
return decodeMsg(msg, v, pubKey, privKey)
}
func decodeMsg(msg []byte, v interface{}, pubKey *wgcfg.Key, privKey *wgcfg.PrivateKey) error {
decrypted, err := decryptMsg(msg, pubKey, privKey)
if err != nil {
return err
}
// fmt.Println(string(decrypted))
if err := json.Unmarshal(decrypted, v); err != nil {
return fmt.Errorf("response: %v", err)
}
return nil
}
func decryptMsg(msg []byte, pubKey *wgcfg.Key, privKey *wgcfg.PrivateKey) ([]byte, error) {
var nonce [24]byte
if len(msg) < len(nonce)+1 {
return nil, fmt.Errorf("response missing nonce, len=%d", len(msg))
}
copy(nonce[:], msg)
msg = msg[len(nonce):]
pub, pri := (*[32]byte)(pubKey), (*[32]byte)(privKey)
decrypted, ok := box.Open(nil, msg, &nonce, pub, pri)
if !ok {
return nil, fmt.Errorf("cannot decrypt response")
}
return decrypted, nil
}
func encode(v interface{}, pubKey *wgcfg.Key, privKey *wgcfg.PrivateKey) ([]byte, error) {
b, err := json.Marshal(v)
if err != nil {
return nil, err
}
return encodeMsg(b, pubKey, privKey)
}
func encodeMsg(b []byte, pubKey *wgcfg.Key, privKey *wgcfg.PrivateKey) ([]byte, error) {
var nonce [24]byte
if _, err := io.ReadFull(rand.Reader, nonce[:]); err != nil {
panic(err)
}
pub, pri := (*[32]byte)(pubKey), (*[32]byte)(privKey)
msg := box.Seal(nonce[:], b, &nonce, pub, pri)
return msg, nil
}
func (h *Headscale) getAvailableIP() (*net.IP, error) {
db, err := h.db()
if err != nil {
return nil, err
}
defer db.Close()
i := 0
for {
ip, err := getRandomIP()
if err != nil {
return nil, err
}
m := Machine{}
if db.First(&m, "ip_address = ?", ip.String()).RecordNotFound() {
return ip, nil
}
i++
if i == 100 { // really random number
break
}
}
return nil, errors.New("Could not find an available IP address in 100.64.0.0/10")
}
func getRandomIP() (*net.IP, error) {
ipo, ipnet, err := net.ParseCIDR("100.64.0.0/10")
if err == nil {
ip := ipo.To4()
fmt.Println("In Randomize IPAddr: IP ", ip, " IPNET: ", ipnet)
fmt.Println("Final address is ", ip)
// fmt.Println("Broadcast address is ", ipb)
// fmt.Println("Network address is ", ipn)
ipRaw := make([]byte, 4)
binary.LittleEndian.PutUint32(ipRaw, mathrand.Uint32())
// ipRaw[3] = 254
// fmt.Println("ipRaw is ", ipRaw)
for i, v := range ipRaw {
// fmt.Println("IP Before: ", ip[i], " v is ", v, " Mask is: ", ipnet.Mask[i])
ip[i] = ip[i] + (v &^ ipnet.Mask[i])
// fmt.Println("IP After: ", ip[i])
}
fmt.Println("FINAL IP: ", ip.String())
return &ip, nil
} else {
return nil, err
}
}