1 // Copyright 2009 The Go Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style
3 // license that can be found in the LICENSE file.
16 func boolint(b bool) int {
23 // Generic socket creation.
24 func socket(net string, f, p, t int, la, ra syscall.Sockaddr, toAddr func(syscall.Sockaddr) Addr) (fd *netFD, err os.Error) {
25 // See ../syscall/exec.go for description of ForkLock.
26 syscall.ForkLock.RLock()
27 s, e := syscall.Socket(f, p, t)
29 syscall.ForkLock.RUnlock()
30 return nil, os.Errno(e)
32 syscall.CloseOnExec(s)
33 syscall.ForkLock.RUnlock()
35 setKernelSpecificSockopt(s, f)
38 e = syscall.Bind(s, la)
41 return nil, os.Errno(e)
45 if fd, err = newFD(s, f, p, net); err != nil {
51 if err = fd.connect(ra); err != nil {
58 sa, _ := syscall.Getsockname(s)
60 sa, _ = syscall.Getpeername(s)
63 fd.setAddr(laddr, raddr)
67 func setsockoptInt(fd, level, opt int, value int) os.Error {
68 return os.NewSyscallError("setsockopt", syscall.SetsockoptInt(fd, level, opt, value))
71 func setsockoptNsec(fd, level, opt int, nsec int64) os.Error {
72 var tv = syscall.NsecToTimeval(nsec)
73 return os.NewSyscallError("setsockopt", syscall.SetsockoptTimeval(fd, level, opt, &tv))
76 func setReadBuffer(fd *netFD, bytes int) os.Error {
79 return setsockoptInt(fd.sysfd, syscall.SOL_SOCKET, syscall.SO_RCVBUF, bytes)
82 func setWriteBuffer(fd *netFD, bytes int) os.Error {
85 return setsockoptInt(fd.sysfd, syscall.SOL_SOCKET, syscall.SO_SNDBUF, bytes)
88 func setReadTimeout(fd *netFD, nsec int64) os.Error {
89 fd.rdeadline_delta = nsec
93 func setWriteTimeout(fd *netFD, nsec int64) os.Error {
94 fd.wdeadline_delta = nsec
98 func setTimeout(fd *netFD, nsec int64) os.Error {
99 if e := setReadTimeout(fd, nsec); e != nil {
102 return setWriteTimeout(fd, nsec)
105 func setReuseAddr(fd *netFD, reuse bool) os.Error {
108 return setsockoptInt(fd.sysfd, syscall.SOL_SOCKET, syscall.SO_REUSEADDR, boolint(reuse))
111 func bindToDevice(fd *netFD, dev string) os.Error {
112 // TODO(rsc): call setsockopt with null-terminated string pointer
116 func setDontRoute(fd *netFD, dontroute bool) os.Error {
119 return setsockoptInt(fd.sysfd, syscall.SOL_SOCKET, syscall.SO_DONTROUTE, boolint(dontroute))
122 func setKeepAlive(fd *netFD, keepalive bool) os.Error {
125 return setsockoptInt(fd.sysfd, syscall.SOL_SOCKET, syscall.SO_KEEPALIVE, boolint(keepalive))
128 func setNoDelay(fd *netFD, noDelay bool) os.Error {
131 return setsockoptInt(fd.sysfd, syscall.IPPROTO_TCP, syscall.TCP_NODELAY, boolint(noDelay))
134 func setLinger(fd *netFD, sec int) os.Error {
138 l.Linger = int32(sec)
145 e := syscall.SetsockoptLinger(fd.sysfd, syscall.SOL_SOCKET, syscall.SO_LINGER, &l)
146 return os.NewSyscallError("setsockopt", e)
149 type UnknownSocketError struct {
153 func (e *UnknownSocketError) String() string {
154 return "unknown socket address type " + reflect.TypeOf(e.sa).String()
157 func sockaddrToString(sa syscall.Sockaddr) (name string, err os.Error) {
158 switch a := sa.(type) {
159 case *syscall.SockaddrInet4:
160 return JoinHostPort(IP(a.Addr[0:]).String(), itoa(a.Port)), nil
161 case *syscall.SockaddrInet6:
162 return JoinHostPort(IP(a.Addr[0:]).String(), itoa(a.Port)), nil
163 case *syscall.SockaddrUnix:
167 return "", &UnknownSocketError{sa}