/
conn.go
81 lines (64 loc) · 1.42 KB
/
conn.go
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package main
import (
"net"
"time"
"github.com/dchest/spipe"
)
type BufferedSpipeConn struct {
net.Conn
packets chan []byte
quit chan struct{}
}
func newBufferedSpipeConn(conn net.Conn) BufferedSpipeConn {
bsc := BufferedSpipeConn{conn, make(chan []byte), make(chan struct{}, 1)}
go func() {
var buf [1024]byte
buflen := 0
// experimentally, the callers don't batch faster than every
// 10ms, so 50ms is a safe amount of time to wait
tick := time.Tick(50 * time.Millisecond)
for {
select {
case packet := <-bsc.packets:
if buflen+len(packet) < len(buf) {
n := copy(buf[buflen:], packet)
buflen += n
break
}
copy(buf[buflen:], packet[:1024-buflen])
conn.Write(buf[:])
packet = packet[1024-buflen:]
for len(packet) > 1024 {
conn.Write(packet[:1024])
packet = packet[1024:]
}
buflen = copy(buf[:], packet)
case <-tick:
if buflen == 0 {
break
}
conn.Write(buf[:buflen])
buflen = 0
case <-bsc.quit:
return
}
}
}()
return bsc
}
func (bsc BufferedSpipeConn) Write(p []byte) (n int, err error) {
bsc.packets <- p
// MEH
return len(p), nil
}
func (bsc BufferedSpipeConn) Close() error {
bsc.quit <- struct{}{}
return bsc.Conn.Close()
}
func NewTCPConn(key []byte, peer string) (conn net.Conn, err error) {
sconn, err := spipe.Dial(key, "tcp", peer)
if err != nil {
return
}
return newBufferedSpipeConn(sconn), nil
}