server: remove reflect

see https://groups.google.com/forum/#!topic/golang-nuts/dm86z8rfIbA

Signed-off-by: ISHIDA Wataru <ishida.wataru@lab.ntt.co.jp>

1 files changed, 18 insertions, 19 deletions

diff --git a/server/sockopt.go b/server/sockopt.go
index 429063b2..43602036 100644
--- a/server/sockopt.go
+++ b/server/sockopt.go
@@ -3,7 +3,6 @@ package server
 import (
 	"net"
 	"os"
-	"reflect"
 	"strings"
 	"syscall"
 	"unsafe"
@@ -39,25 +38,17 @@ func buildTcpMD5Sig(address string, key string) (tcpmd5sig, error) {
 	return t, nil
 }
 
-func connToFd(v reflect.Value) int {
-	fd := v.FieldByName("fd")
-	p := reflect.Indirect(fd)
-	sysfd := p.FieldByName("sysfd")
-	return int(sysfd.Int())
-}
-
-func listenerToFd(l *net.TCPListener) int {
-	return connToFd(reflect.ValueOf(*l))
-}
-
-func tcpConnToFd(tcp *net.TCPConn) int {
-	n := reflect.ValueOf(*tcp)
-	return connToFd(n.FieldByName("conn"))
-}
-
 func SetTcpMD5SigSockopts(l *net.TCPListener, address string, key string) error {
 	t, _ := buildTcpMD5Sig(address, key)
-	_, _, e := syscall.Syscall6(syscall.SYS_SETSOCKOPT, uintptr(listenerToFd(l)),
+	fi, err := l.File()
+	defer fi.Close()
+	if err != nil {
+		return err
+	}
+	if l, err := net.FileListener(fi); err == nil {
+		defer l.Close()
+	}
+	_, _, e := syscall.Syscall6(syscall.SYS_SETSOCKOPT, fi.Fd(),
 		uintptr(syscall.IPPROTO_TCP), uintptr(TCP_MD5SIG),
 		uintptr(unsafe.Pointer(&t)), unsafe.Sizeof(t), 0)
 	return e
@@ -70,5 +61,13 @@ func SetTcpTTLSockopts(conn *net.TCPConn, ttl int) error {
 		level = syscall.IPPROTO_IPV6
 		name = syscall.IPV6_UNICAST_HOPS
 	}
-	return os.NewSyscallError("setsockopt", syscall.SetsockoptInt(tcpConnToFd(conn), level, name, ttl))
+	fi, err := conn.File()
+	defer fi.Close()
+	if err != nil {
+		return err
+	}
+	if conn, err := net.FileConn(fi); err == nil {
+		defer conn.Close()
+	}
+	return os.NewSyscallError("setsockopt", syscall.SetsockoptInt(int(fi.Fd()), level, name, ttl))
 }