route/server/server.go

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package server
import (
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"crypto/rsa"
"crypto/x509"
"encoding/pem"
"errors"
"io/ioutil"
"log"
"net"
"net/http"
"net/rpc"
"os"
"path/filepath"
"time"
"git.xeserv.us/xena/route/database"
"git.xeserv.us/xena/route/lib/elfs"
"git.xeserv.us/xena/route/routerpc"
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"git.xeserv.us/xena/route/utils"
"github.com/Xe/uuid"
"github.com/Yawning/bulb"
"github.com/koding/tunnel"
)
// RPC constants
const (
RPCPort uint16 = 39453
)
// Server is the main server type
type Server struct {
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cfg *Config
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db *database.DB
tor *Tor
rpcS *rpc.Server
rpcAddr string
ts *tunnel.Server
}
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// Config configures Server
type Config struct {
ControlHost, ControlKeyFile string
RethinkDBHost, RethinkDBDatabase string
TorDataDir, TorHashedPassword, TorPassword string
WebPort, DomainSuffix string
}
// New creates a new Server
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func New(cfg Config) (*Server, error) {
db, err := database.New(cfg.RethinkDBHost, cfg.RethinkDBDatabase)
if err != nil {
return nil, err
}
l, err := net.Listen("tcp", "127.0.0.1:0")
if err != nil {
return nil, err
}
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t, err := StartTor(TorConfig{
DataDir: cfg.TorDataDir,
HashedControlPassword: cfg.TorHashedPassword,
ClearPassword: cfg.TorPassword,
Timeout: 30 * time.Second,
})
if err != nil {
return nil, err
}
fin, err := os.Open(cfg.ControlKeyFile)
if err != nil {
return nil, err
}
defer fin.Close()
data, err := ioutil.ReadAll(fin)
if err != nil {
return nil, err
}
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pKey, err := utils.PemToRSAPrivateKey(data)
if err != nil {
return nil, err
}
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_, err = t.AddOnion(pKey, RPCPort, l.Addr().String())
if err != nil {
return nil, err
}
rpcs := rpc.NewServer()
ts, err := tunnel.NewServer(&tunnel.ServerConfig{})
if err != nil {
return nil, err
}
s := &Server{
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cfg: &cfg,
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db: db,
tor: t,
rpcS: rpcs,
rpcAddr: l.Addr().String(),
ts: ts,
}
rpcs.RegisterName("Urls", &RPCServer{Server: s})
go rpcs.Accept(l)
err = s.restore()
if err != nil {
return nil, err
}
return s, nil
}
func (s *Server) onionPath(name string) string {
return filepath.Join(s.cfg.TorDataDir, name)
}
func (s *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
if r.RequestURI == rpc.DefaultRPCPath {
s.rpcS.ServeHTTP(w, r)
return
}
s.ts.ServeHTTP(w, r)
}
func (s *Server) restore() error {
rts, err := s.db.GetAllRoutes()
if err != nil {
return err
}
for _, rt := range rts {
var block *pem.Block
block, _ = pem.Decode([]byte(rt.OnionKey))
pKey, err := x509.ParsePKCS1PrivateKey(block.Bytes)
if err != nil {
return err
}
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_, err = s.tor.AddOnion(pKey, 80, "127.0.0.1:"+s.cfg.WebPort)
if err != nil {
return err
}
s.ts.AddHost(rt.Hostname, rt.Token)
s.ts.AddHost(rt.OnionHostname, rt.Token)
log.Printf("added: %s (%s)", rt.Hostname, rt.OnionHostname)
}
return nil
}
func genPortSpec(incoming uint16, outgoing string) bulb.OnionPortSpec {
return bulb.OnionPortSpec{
VirtPort: incoming,
Target: outgoing,
}
}
// RPCServer is a Server wrapped to work inside the context of net/rpc
type RPCServer struct {
*Server
}
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// AddHost adds a host to the server.
func (rs *RPCServer) AddHost(req routerpc.AddHostRequest, resp *routerpc.AddHostResponse) error {
if req.APIKey != "hunter2" {
return errors.New("invalid api key")
}
token := uuid.New()
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var pKey *rsa.PrivateKey
if kk, ok := req.PrivKey.(*rsa.PrivateKey); ok {
pKey = kk
}
oi, err := rs.tor.AddOnion(pKey, 80, "127.0.0.1:"+rs.cfg.WebPort)
if err != nil {
return err
}
resp.OnionHostname = oi.OnionID + ".onion"
resp.Token = token
if req.Hostname != "" {
rs.Server.ts.AddHost(req.Hostname, token)
resp.Hostname = req.Hostname
} else {
resp.Hostname = elfs.MakeName() + rs.cfg.DomainSuffix
rs.ts.AddHost(resp.Hostname, token)
}
rs.Server.ts.AddHost(resp.OnionHostname, token)
err = rs.db.SaveRoute(resp)
if err != nil {
return err
}
return nil
}