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package util
import (
"github.com/seaweedfs/seaweedfs/weed/glog"
"net"
"time"
"github.com/seaweedfs/seaweedfs/weed/stats"
)
// Listener wraps a net.Listener, and gives a place to store the timeout
// parameters. On Accept, it will wrap the net.Conn with our own Conn for us.
type Listener struct {
net.Listener
ReadTimeout time.Duration
WriteTimeout time.Duration
}
func (l *Listener) Accept() (net.Conn, error) {
c, err := l.Listener.Accept()
if err != nil {
return nil, err
}
stats.ConnectionOpen()
tc := &Conn{
Conn: c,
ReadTimeout: l.ReadTimeout,
WriteTimeout: l.WriteTimeout,
}
return tc, nil
}
// Conn wraps a net.Conn, and sets a deadline for every read
// and write operation.
type Conn struct {
net.Conn
ReadTimeout time.Duration
WriteTimeout time.Duration
isClosed bool
bytesRead int64
bytesWritten int64
}
func (c *Conn) Read(b []byte) (count int, e error) {
if c.ReadTimeout != 0 {
err := c.Conn.SetReadDeadline(time.Now().Add(c.ReadTimeout * time.Duration(c.bytesRead/40000+1)))
if err != nil {
return 0, err
}
}
count, e = c.Conn.Read(b)
if e == nil {
stats.BytesIn(int64(count))
c.bytesRead += int64(count)
}
return
}
func (c *Conn) Write(b []byte) (count int, e error) {
if c.WriteTimeout != 0 {
// minimum 4KB/s
err := c.Conn.SetWriteDeadline(time.Now().Add(c.WriteTimeout * time.Duration(c.bytesWritten/40000+1)))
if err != nil {
return 0, err
}
}
count, e = c.Conn.Write(b)
if e == nil {
stats.BytesOut(int64(count))
c.bytesWritten += int64(count)
}
return
}
func (c *Conn) Close() error {
err := c.Conn.Close()
if err == nil {
if !c.isClosed {
stats.ConnectionClose()
c.isClosed = true
}
}
return err
}
func NewListener(addr string, timeout time.Duration) (ipListener net.Listener, err error) {
listener, err := net.Listen("tcp", addr)
if err != nil {
return
}
ipListener = &Listener{
Listener: listener,
ReadTimeout: timeout,
WriteTimeout: timeout,
}
return
}
func NewIpAndLocalListeners(host string, port int, timeout time.Duration) (ipListener net.Listener, localListener net.Listener, err error) {
listener, err := net.Listen("tcp", JoinHostPort(host, port))
if err != nil {
return
}
ipListener = &Listener{
Listener: listener,
ReadTimeout: timeout,
WriteTimeout: timeout,
}
if host != "localhost" && host != "" && host != "0.0.0.0" && host != "127.0.0.1" && host != "[::]" && host != "[::1]" {
listener, err = net.Listen("tcp", JoinHostPort("localhost", port))
if err != nil {
glog.V(0).Infof("skip starting on %s:%d: %v", host, port, err)
return ipListener, nil, nil
}
localListener = &Listener{
Listener: listener,
ReadTimeout: timeout,
WriteTimeout: timeout,
}
}
return
}
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