2009-11-01 12:15:34 -07:00
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// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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2011-12-21 03:44:47 -07:00
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// +build darwin freebsd linux netbsd openbsd windows
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build: add build comments to core packages
The go/build package already recognizes
system-specific file names like
mycode_darwin.go
mycode_darwin_386.go
mycode_386.s
However, it is also common to write files that
apply to multiple architectures, so a recent CL added
to go/build the ability to process comments
listing a set of conditions for building. For example:
// +build darwin freebsd openbsd/386
says that this file should be compiled only on
OS X, FreeBSD, or 32-bit x86 OpenBSD systems.
These conventions are not yet documented
(hence this long CL description).
This CL adds build comments to the multi-system
files in the core library, a step toward making it
possible to use go/build to build them.
With this change go/build can handle crypto/rand,
exec, net, path/filepath, os/user, and time.
os and syscall need additional adjustments.
R=golang-dev, r, gri, r, gustavo
CC=golang-dev
https://golang.org/cl/5011046
2011-09-15 14:48:57 -06:00
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2009-11-01 12:15:34 -07:00
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package net
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import (
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2009-12-15 16:35:38 -07:00
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"syscall"
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2012-11-08 09:35:16 -07:00
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"time"
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2009-11-01 12:15:34 -07:00
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)
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2012-01-13 21:42:18 -07:00
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var listenerBacklog = maxListenerBacklog()
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2013-02-08 01:02:08 -07:00
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// Generic POSIX socket creation.
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2012-11-08 09:35:16 -07:00
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func socket(net string, f, t, p int, ipv6only bool, ulsa, ursa syscall.Sockaddr, deadline time.Time, toAddr func(syscall.Sockaddr) Addr) (fd *netFD, err error) {
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2013-01-28 09:54:15 -07:00
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s, err := sysSocket(f, t, p)
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2011-11-13 20:44:52 -07:00
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if err != nil {
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return nil, err
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2009-11-01 12:15:34 -07:00
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}
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2012-08-23 05:54:00 -06:00
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if err = setDefaultSockopts(s, f, t, ipv6only); err != nil {
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2012-01-31 09:53:26 -07:00
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closesocket(s)
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return nil, err
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}
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2010-09-24 14:52:06 -06:00
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2012-08-23 05:54:00 -06:00
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if ulsa != nil {
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2012-11-12 20:26:20 -07:00
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// We provide a socket that listens to a wildcard
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// address with reusable UDP port when the given ulsa
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// is an appropriate UDP multicast address prefix.
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// This makes it possible for a single UDP listener
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// to join multiple different group addresses, for
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// multiple UDP listeners that listen on the same UDP
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// port to join the same group address.
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if ulsa, err = listenerSockaddr(s, f, ulsa, toAddr); err != nil {
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closesocket(s)
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return nil, err
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}
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2012-11-12 20:26:20 -07:00
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if err = syscall.Bind(s, ulsa); err != nil {
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2011-03-29 12:23:42 -06:00
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closesocket(s)
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return nil, err
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2011-03-29 12:23:42 -06:00
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}
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}
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2012-01-19 15:31:13 -07:00
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if fd, err = newFD(s, f, t, net); err != nil {
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2011-03-28 21:40:01 -06:00
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closesocket(s)
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return nil, err
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2009-11-01 12:15:34 -07:00
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}
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2012-08-23 05:54:00 -06:00
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if ursa != nil {
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2013-03-07 10:44:24 -07:00
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if !deadline.IsZero() {
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setWriteDeadline(fd, deadline)
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}
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2012-08-23 05:54:00 -06:00
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if err = fd.connect(ursa); err != nil {
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closesocket(s)
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return nil, err
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}
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2012-01-26 09:31:42 -07:00
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fd.isConnected = true
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if !deadline.IsZero() {
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setWriteDeadline(fd, time.Time{})
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}
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2009-11-01 12:15:34 -07:00
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}
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2012-09-18 10:33:03 -06:00
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lsa, _ := syscall.Getsockname(s)
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laddr := toAddr(lsa)
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rsa, _ := syscall.Getpeername(s)
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raddr := toAddr(rsa)
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fd.setAddr(laddr, raddr)
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2013-03-13 12:49:24 -06:00
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if fd.raddr == nil {
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fd.raddr = toAddr(ursa)
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}
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2009-12-15 16:35:38 -07:00
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return fd, nil
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2009-11-01 12:15:34 -07:00
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}
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