/
main.go
71 lines (53 loc) · 1.57 KB
/
main.go
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package main
import (
"fmt"
"io"
"net"
"os"
reuse "github.com/ipfs/go-ipfs/Godeps/_workspace/src/github.com/jbenet/go-reuseport"
resolve "github.com/jbenet/go-net-resolve-addr"
)
func main() {
l1, err := reuse.Listen("tcp", "0.0.0.0:11111")
maybeDie(err)
fmt.Printf("listening on %s\n", l1.Addr())
l2, err := reuse.Listen("tcp", "0.0.0.0:22222")
maybeDie(err)
fmt.Printf("listening on %s\n", l2.Addr())
a1, err := resolve.ResolveAddr("dial", "tcp", "127.0.0.1:11111")
maybeDie(err)
a3, err := resolve.ResolveAddr("dial", "tcp", "127.0.0.1:33333")
maybeDie(err)
d1 := reuse.Dialer{net.Dialer{LocalAddr: a1}}
d2 := reuse.Dialer{net.Dialer{LocalAddr: a3}}
go func() {
l2to1foo, err := l2.Accept()
maybeDie(err)
fmt.Printf("%s accepted conn from %s\n", addrStr(l2.Addr()), addrStr(l2to1foo.RemoteAddr()))
fmt.Println("safe")
l1to2bar, err := l1.Accept()
maybeDie(err)
fmt.Printf("%s accepted conn from %s\n", addrStr(l1.Addr()), addrStr(l1to2bar.RemoteAddr()))
io.Copy(l1to2bar, l2to1foo)
}()
d1to2foo, err := d1.Dial("tcp4", "127.0.0.1:22222")
maybeDie(err)
fmt.Printf("dialing from %s to %s\n", d1.D.LocalAddr, "127.0.0.1:22222")
d2to1bar, err := d2.Dial("tcp4", "127.0.0.1:11111")
maybeDie(err)
fmt.Printf("dialing from %s to %s\n", d2.D.LocalAddr, "127.0.0.1:11111")
go io.Copy(d1to2foo, os.Stdin)
io.Copy(os.Stdout, d2to1bar)
}
func die(err error) {
fmt.Fprintf(os.Stderr, "%s\n", err)
os.Exit(-1)
}
func maybeDie(err error) {
if err != nil {
die(err)
}
}
func addrStr(a net.Addr) string {
return fmt.Sprintf("%s/%s", a.Network(), a)
}