/
service.go
206 lines (179 loc) · 4.82 KB
/
service.go
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package worker
import (
"crypto/rand"
"crypto/rsa"
"crypto/tls"
"crypto/x509"
"encoding/pem"
"fmt"
"math/big"
"net"
"strconv"
"time"
"github.com/fatedier/fft/pkg/log"
"github.com/fatedier/fft/pkg/msg"
)
type Options struct {
ServerAddr string
BindAddr string
AdvicePublicIP string
RateKB int // xx KB/s
MaxTrafficMBPerDay int // xx MB, 0 is no limit
LogFile string
LogLevel string
LogMaxDays int64
}
func (op *Options) Check() error {
if op.LogMaxDays <= 0 {
op.LogMaxDays = 3
}
if op.RateKB < 50 {
return fmt.Errorf("rate should be greater than 50KB")
}
if op.MaxTrafficMBPerDay < 128 && op.MaxTrafficMBPerDay != 0 {
return fmt.Errorf("max_traffic_per_day should be greater than 128MB")
}
return nil
}
type Service struct {
serverAddr string
advicePublicIP string
rateKB int
maxTrafficMBPerDay int
l net.Listener
matchCtl *MatchController
register *Register
trafficLimiter *TrafficLimiter
tlsConfig *tls.Config
stopCh chan struct{}
}
func NewService(options Options) (*Service, error) {
if err := options.Check(); err != nil {
return nil, err
}
logway := "file"
if options.LogFile == "console" {
logway = "console"
}
log.InitLog(logway, options.LogFile, options.LogLevel, options.LogMaxDays)
l, err := net.Listen("tcp", options.BindAddr)
if err != nil {
return nil, err
}
log.Info("fftw listen on: %s", l.Addr().String())
_, portStr, err := net.SplitHostPort(l.Addr().String())
if err != nil {
return nil, fmt.Errorf("get bind port error, bind address: %v", l.Addr().String())
}
port, err := strconv.Atoi(portStr)
if err != nil {
return nil, fmt.Errorf("get bind port error: %v", err)
}
register, err := NewRegister(int64(port), options.AdvicePublicIP, options.ServerAddr)
if err != nil {
return nil, fmt.Errorf("new register error: %v", err)
}
svc := &Service{
serverAddr: options.ServerAddr,
advicePublicIP: options.AdvicePublicIP,
rateKB: options.RateKB,
maxTrafficMBPerDay: options.MaxTrafficMBPerDay,
l: l,
register: register,
tlsConfig: generateTLSConfig(),
stopCh: make(chan struct{}),
}
svc.trafficLimiter = NewTrafficLimiter(uint64(options.MaxTrafficMBPerDay*1024*1024), func() {
svc.register.Close()
log.Info("reach traffic limit %dMB one day, unregister from server", options.MaxTrafficMBPerDay)
}, func() {
svc.register.Reset()
go svc.register.RunKeepAlive()
log.Info("restore from traffic limit since it's a new day")
})
svc.matchCtl = NewMatchController(options.RateKB*1024, func(n int) {
svc.trafficLimiter.AddCount(uint64(n))
})
return svc, nil
}
func (svc *Service) Run() error {
go svc.worker()
go svc.trafficLimiter.Run()
err := svc.register.Register()
if err != nil {
return fmt.Errorf("register worker to server error: %v", err)
}
log.Info("register to server success")
svc.register.RunKeepAlive()
<-svc.stopCh
return nil
}
func (svc *Service) worker() error {
for {
conn, err := svc.l.Accept()
if err != nil {
return err
}
conn = tls.Server(conn, svc.tlsConfig)
go svc.handleConn(conn)
}
}
func (svc *Service) handleConn(conn net.Conn) {
var (
rawMsg msg.Message
err error
)
conn.SetReadDeadline(time.Now().Add(5 * time.Second))
if rawMsg, err = msg.ReadMsg(conn); err != nil {
conn.Close()
return
}
conn.SetReadDeadline(time.Time{})
switch m := rawMsg.(type) {
case *msg.NewSendFileStream:
log.Debug("new send file stream [%s]", m.ID)
tc := NewTransferConn(m.ID, conn, true)
if err = svc.matchCtl.DealTransferConn(tc, 20*time.Second); err != nil {
msg.WriteMsg(conn, &msg.NewSendFileStreamResp{
Error: err.Error(),
})
conn.Close()
}
case *msg.NewReceiveFileStream:
log.Debug("new recv file stream [%s]", m.ID)
tc := NewTransferConn(m.ID, conn, false)
if err = svc.matchCtl.DealTransferConn(tc, 20*time.Second); err != nil {
msg.WriteMsg(conn, &msg.NewReceiveFileStreamResp{
Error: err.Error(),
})
conn.Close()
}
case *msg.Ping:
log.Debug("return pong to server ping")
msg.WriteMsg(conn, &msg.Pong{})
conn.Close()
return
default:
conn.Close()
return
}
}
// Setup a bare-bones TLS config for the server
func generateTLSConfig() *tls.Config {
key, err := rsa.GenerateKey(rand.Reader, 1024)
if err != nil {
panic(err)
}
template := x509.Certificate{SerialNumber: big.NewInt(1)}
certDER, err := x509.CreateCertificate(rand.Reader, &template, &template, &key.PublicKey, key)
if err != nil {
panic(err)
}
keyPEM := pem.EncodeToMemory(&pem.Block{Type: "RSA PRIVATE KEY", Bytes: x509.MarshalPKCS1PrivateKey(key)})
certPEM := pem.EncodeToMemory(&pem.Block{Type: "CERTIFICATE", Bytes: certDER})
tlsCert, err := tls.X509KeyPair(certPEM, keyPEM)
if err != nil {
panic(err)
}
return &tls.Config{Certificates: []tls.Certificate{tlsCert}}
}