Imported Upstream version 60upstream/60

1 files changed, 166 insertions, 0 deletions

diff --git a/src/pkg/net/sock.go b/src/pkg/net/sock.go
new file mode 100644
index 000000000..821716e43
--- /dev/null
+++ b/src/pkg/net/sock.go
@@ -0,0 +1,166 @@
+// Copyright 2009 The Go Authors.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Sockets
+
+package net
+
+import (
+	"io"
+	"os"
+	"reflect"
+	"syscall"
+)
+
+// Boolean to int.
+func boolint(b bool) int {
+	if b {
+		return 1
+	}
+	return 0
+}
+
+// Generic socket creation.
+func socket(net string, f, p, t int, la, ra syscall.Sockaddr, toAddr func(syscall.Sockaddr) Addr) (fd *netFD, err os.Error) {
+	// See ../syscall/exec.go for description of ForkLock.
+	syscall.ForkLock.RLock()
+	s, e := syscall.Socket(f, p, t)
+	if e != 0 {
+		syscall.ForkLock.RUnlock()
+		return nil, os.Errno(e)
+	}
+	syscall.CloseOnExec(s)
+	syscall.ForkLock.RUnlock()
+
+	setKernelSpecificSockopt(s, f)
+
+	if la != nil {
+		e = syscall.Bind(s, la)
+		if e != 0 {
+			closesocket(s)
+			return nil, os.Errno(e)
+		}
+	}
+
+	if fd, err = newFD(s, f, p, net); err != nil {
+		closesocket(s)
+		return nil, err
+	}
+
+	if ra != nil {
+		if err = fd.connect(ra); err != nil {
+			fd.Close()
+			return nil, err
+		}
+	}
+
+	sa, _ := syscall.Getsockname(s)
+	laddr := toAddr(sa)
+	sa, _ = syscall.Getpeername(s)
+	raddr := toAddr(sa)
+
+	fd.setAddr(laddr, raddr)
+	return fd, nil
+}
+
+func setsockoptInt(fd *netFD, level, opt int, value int) os.Error {
+	return os.NewSyscallError("setsockopt", syscall.SetsockoptInt(fd.sysfd, level, opt, value))
+}
+
+func setsockoptNsec(fd *netFD, level, opt int, nsec int64) os.Error {
+	var tv = syscall.NsecToTimeval(nsec)
+	return os.NewSyscallError("setsockopt", syscall.SetsockoptTimeval(fd.sysfd, level, opt, &tv))
+}
+
+func setReadBuffer(fd *netFD, bytes int) os.Error {
+	fd.incref()
+	defer fd.decref()
+	return setsockoptInt(fd, syscall.SOL_SOCKET, syscall.SO_RCVBUF, bytes)
+}
+
+func setWriteBuffer(fd *netFD, bytes int) os.Error {
+	fd.incref()
+	defer fd.decref()
+	return setsockoptInt(fd, syscall.SOL_SOCKET, syscall.SO_SNDBUF, bytes)
+}
+
+func setReadTimeout(fd *netFD, nsec int64) os.Error {
+	fd.rdeadline_delta = nsec
+	return nil
+}
+
+func setWriteTimeout(fd *netFD, nsec int64) os.Error {
+	fd.wdeadline_delta = nsec
+	return nil
+}
+
+func setTimeout(fd *netFD, nsec int64) os.Error {
+	if e := setReadTimeout(fd, nsec); e != nil {
+		return e
+	}
+	return setWriteTimeout(fd, nsec)
+}
+
+func setReuseAddr(fd *netFD, reuse bool) os.Error {
+	fd.incref()
+	defer fd.decref()
+	return setsockoptInt(fd, syscall.SOL_SOCKET, syscall.SO_REUSEADDR, boolint(reuse))
+}
+
+func bindToDevice(fd *netFD, dev string) os.Error {
+	// TODO(rsc): call setsockopt with null-terminated string pointer
+	return os.EINVAL
+}
+
+func setDontRoute(fd *netFD, dontroute bool) os.Error {
+	fd.incref()
+	defer fd.decref()
+	return setsockoptInt(fd, syscall.SOL_SOCKET, syscall.SO_DONTROUTE, boolint(dontroute))
+}
+
+func setKeepAlive(fd *netFD, keepalive bool) os.Error {
+	fd.incref()
+	defer fd.decref()
+	return setsockoptInt(fd, syscall.SOL_SOCKET, syscall.SO_KEEPALIVE, boolint(keepalive))
+}
+
+func setNoDelay(fd *netFD, noDelay bool) os.Error {
+	fd.incref()
+	defer fd.decref()
+	return setsockoptInt(fd, syscall.IPPROTO_TCP, syscall.TCP_NODELAY, boolint(noDelay))
+}
+
+func setLinger(fd *netFD, sec int) os.Error {
+	var l syscall.Linger
+	if sec >= 0 {
+		l.Onoff = 1
+		l.Linger = int32(sec)
+	} else {
+		l.Onoff = 0
+		l.Linger = 0
+	}
+	fd.incref()
+	defer fd.decref()
+	e := syscall.SetsockoptLinger(fd.sysfd, syscall.SOL_SOCKET, syscall.SO_LINGER, &l)
+	return os.NewSyscallError("setsockopt", e)
+}
+
+type UnknownSocketError struct {
+	sa syscall.Sockaddr
+}
+
+func (e *UnknownSocketError) String() string {
+	return "unknown socket address type " + reflect.TypeOf(e.sa).String()
+}
+
+type writerOnly struct {
+	io.Writer
+}
+
+// Fallback implementation of io.ReaderFrom's ReadFrom, when sendfile isn't
+// applicable.
+func genericReadFrom(w io.Writer, r io.Reader) (n int64, err os.Error) {
+	// Use wrapper to hide existing r.ReadFrom from io.Copy.
+	return io.Copy(writerOnly{w}, r)
+}