// AcceptEx wraps syscall.AcceptEx.
func (sw *Switch) AcceptEx(ls syscall.Handle, as syscall.Handle, b *byte, rxdatalen uint32, laddrlen uint32, raddrlen uint32, rcvd *uint32, overlapped *syscall.Overlapped) error {
so := sw.sockso(ls)
if so == nil {
return syscall.AcceptEx(ls, as, b, rxdatalen, laddrlen, raddrlen, rcvd, overlapped)
}
sw.fmu.RLock()
f, _ := sw.fltab[FilterAccept]
sw.fmu.RUnlock()
af, err := f.apply(so)
if err != nil {
return err
}
so.Err = syscall.AcceptEx(ls, as, b, rxdatalen, laddrlen, raddrlen, rcvd, overlapped)
if err = af.apply(so); err != nil {
return err
}
sw.smu.Lock()
defer sw.smu.Unlock()
if so.Err != nil {
sw.stats.getLocked(so.Cookie).AcceptFailed++
return so.Err
}
nso := sw.addLocked(as, so.Cookie.Family(), so.Cookie.Type(), so.Cookie.Protocol())
sw.stats.getLocked(nso.Cookie).Accepted++
return nil
}
func (fd *netFD) accept(toAddr func(syscall.Sockaddr) Addr) (*netFD, error) {
if err := fd.readLock(); err != nil {
return nil, err
}
defer fd.readUnlock()
// Get new socket.
s, err := sysSocket(fd.family, fd.sotype, 0)
if err != nil {
return nil, &OpError{"socket", fd.net, fd.laddr, err}
}
// Associate our new socket with IOCP.
netfd, err := newFD(s, fd.family, fd.sotype, fd.net)
if err != nil {
closesocket(s)
return nil, &OpError{"accept", fd.net, fd.laddr, err}
}
if err := netfd.init(); err != nil {
fd.Close()
return nil, err
}
// Submit accept request.
o := &fd.rop
o.handle = s
var rawsa [2]syscall.RawSockaddrAny
o.rsan = int32(unsafe.Sizeof(rawsa[0]))
_, err = rsrv.ExecIO(o, "AcceptEx", func(o *operation) error {
return syscall.AcceptEx(o.fd.sysfd, o.handle, (*byte)(unsafe.Pointer(&rawsa[0])), 0, uint32(o.rsan), uint32(o.rsan), &o.qty, &o.o)
})
if err != nil {
netfd.Close()
return nil, err
}
// Inherit properties of the listening socket.
err = syscall.Setsockopt(s, syscall.SOL_SOCKET, syscall.SO_UPDATE_ACCEPT_CONTEXT, (*byte)(unsafe.Pointer(&fd.sysfd)), int32(unsafe.Sizeof(fd.sysfd)))
if err != nil {
netfd.Close()
return nil, &OpError{"Setsockopt", fd.net, fd.laddr, err}
}
// Get local and peer addr out of AcceptEx buffer.
var lrsa, rrsa *syscall.RawSockaddrAny
var llen, rlen int32
syscall.GetAcceptExSockaddrs((*byte)(unsafe.Pointer(&rawsa[0])),
0, uint32(o.rsan), uint32(o.rsan), &lrsa, &llen, &rrsa, &rlen)
lsa, _ := lrsa.Sockaddr()
rsa, _ := rrsa.Sockaddr()
netfd.setAddr(toAddr(lsa), toAddr(rsa))
return netfd, nil
}
func (fd *netFD) acceptOne(rawsa []syscall.RawSockaddrAny, o *operation) (*netFD, error) {
// Get new socket.
s, err := sysSocket(fd.family, fd.sotype, 0)
if err != nil {
return nil, err
}
// Associate our new socket with IOCP.
netfd, err := newFD(s, fd.family, fd.sotype, fd.net)
if err != nil {
closeFunc(s)
return nil, err
}
if err := netfd.init(); err != nil {
fd.Close()
return nil, err
}
// Submit accept request.
o.handle = s
o.rsan = int32(unsafe.Sizeof(rawsa[0]))
_, err = rsrv.ExecIO(o, "AcceptEx", func(o *operation) error {
return syscall.AcceptEx(o.fd.sysfd, o.handle, (*byte)(unsafe.Pointer(&rawsa[0])), 0, uint32(o.rsan), uint32(o.rsan), &o.qty, &o.o)
})
if err != nil {
netfd.Close()
if _, ok := err.(syscall.Errno); ok {
err = os.NewSyscallError("acceptex", err)
}
return nil, err
}
// Inherit properties of the listening socket.
err = syscall.Setsockopt(s, syscall.SOL_SOCKET, syscall.SO_UPDATE_ACCEPT_CONTEXT, (*byte)(unsafe.Pointer(&fd.sysfd)), int32(unsafe.Sizeof(fd.sysfd)))
if err != nil {
netfd.Close()
return nil, os.NewSyscallError("setsockopt", err)
}
return netfd, nil
}
func (o *acceptOp) Submit() error {
var d uint32
l := uint32(unsafe.Sizeof(o.attrs[0]))
return syscall.AcceptEx(o.fd.sysfd, o.newsock,
(*byte)(unsafe.Pointer(&o.attrs[0])), 0, l, l, &d, &o.o)
}