sys_windows.go

Documentation: net/internal/socktest

     1  // Copyright 2015 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.
     4  
     5  package socktest
     6  
     7  import (
     8  	"internal/syscall/windows"
     9  	"syscall"
    10  )
    11  
    12  // WSASocket wraps [syscall.WSASocket].
    13  func (sw *Switch) WSASocket(family, sotype, proto int32, protinfo *syscall.WSAProtocolInfo, group uint32, flags uint32) (s syscall.Handle, err error) {
    14  	sw.once.Do(sw.init)
    15  
    16  	so := &Status{Cookie: cookie(int(family), int(sotype), int(proto))}
    17  	sw.fmu.RLock()
    18  	f, _ := sw.fltab[FilterSocket]
    19  	sw.fmu.RUnlock()
    20  
    21  	af, err := f.apply(so)
    22  	if err != nil {
    23  		return syscall.InvalidHandle, err
    24  	}
    25  	s, so.Err = windows.WSASocket(family, sotype, proto, protinfo, group, flags)
    26  	if err = af.apply(so); err != nil {
    27  		if so.Err == nil {
    28  			syscall.Closesocket(s)
    29  		}
    30  		return syscall.InvalidHandle, err
    31  	}
    32  
    33  	sw.smu.Lock()
    34  	defer sw.smu.Unlock()
    35  	if so.Err != nil {
    36  		sw.stats.getLocked(so.Cookie).OpenFailed++
    37  		return syscall.InvalidHandle, so.Err
    38  	}
    39  	nso := sw.addLocked(s, int(family), int(sotype), int(proto))
    40  	sw.stats.getLocked(nso.Cookie).Opened++
    41  	return s, nil
    42  }
    43  
    44  // Closesocket wraps [syscall.Closesocket].
    45  func (sw *Switch) Closesocket(s syscall.Handle) (err error) {
    46  	so := sw.sockso(s)
    47  	if so == nil {
    48  		return syscall.Closesocket(s)
    49  	}
    50  	sw.fmu.RLock()
    51  	f, _ := sw.fltab[FilterClose]
    52  	sw.fmu.RUnlock()
    53  
    54  	af, err := f.apply(so)
    55  	if err != nil {
    56  		return err
    57  	}
    58  	so.Err = syscall.Closesocket(s)
    59  	if err = af.apply(so); err != nil {
    60  		return err
    61  	}
    62  
    63  	sw.smu.Lock()
    64  	defer sw.smu.Unlock()
    65  	if so.Err != nil {
    66  		sw.stats.getLocked(so.Cookie).CloseFailed++
    67  		return so.Err
    68  	}
    69  	delete(sw.sotab, s)
    70  	sw.stats.getLocked(so.Cookie).Closed++
    71  	return nil
    72  }
    73  
    74  // Connect wraps [syscall.Connect].
    75  func (sw *Switch) Connect(s syscall.Handle, sa syscall.Sockaddr) (err error) {
    76  	so := sw.sockso(s)
    77  	if so == nil {
    78  		return syscall.Connect(s, sa)
    79  	}
    80  	sw.fmu.RLock()
    81  	f, _ := sw.fltab[FilterConnect]
    82  	sw.fmu.RUnlock()
    83  
    84  	af, err := f.apply(so)
    85  	if err != nil {
    86  		return err
    87  	}
    88  	so.Err = syscall.Connect(s, sa)
    89  	if err = af.apply(so); err != nil {
    90  		return err
    91  	}
    92  
    93  	sw.smu.Lock()
    94  	defer sw.smu.Unlock()
    95  	if so.Err != nil {
    96  		sw.stats.getLocked(so.Cookie).ConnectFailed++
    97  		return so.Err
    98  	}
    99  	sw.stats.getLocked(so.Cookie).Connected++
   100  	return nil
   101  }
   102  
   103  // ConnectEx wraps [syscall.ConnectEx].
   104  func (sw *Switch) ConnectEx(s syscall.Handle, sa syscall.Sockaddr, b *byte, n uint32, nwr *uint32, o *syscall.Overlapped) (err error) {
   105  	so := sw.sockso(s)
   106  	if so == nil {
   107  		return syscall.ConnectEx(s, sa, b, n, nwr, o)
   108  	}
   109  	sw.fmu.RLock()
   110  	f, _ := sw.fltab[FilterConnect]
   111  	sw.fmu.RUnlock()
   112  
   113  	af, err := f.apply(so)
   114  	if err != nil {
   115  		return err
   116  	}
   117  	so.Err = syscall.ConnectEx(s, sa, b, n, nwr, o)
   118  	if err = af.apply(so); err != nil {
   119  		return err
   120  	}
   121  
   122  	sw.smu.Lock()
   123  	defer sw.smu.Unlock()
   124  	if so.Err != nil {
   125  		sw.stats.getLocked(so.Cookie).ConnectFailed++
   126  		return so.Err
   127  	}
   128  	sw.stats.getLocked(so.Cookie).Connected++
   129  	return nil
   130  }
   131  
   132  // Listen wraps [syscall.Listen].
   133  func (sw *Switch) Listen(s syscall.Handle, backlog int) (err error) {
   134  	so := sw.sockso(s)
   135  	if so == nil {
   136  		return syscall.Listen(s, backlog)
   137  	}
   138  	sw.fmu.RLock()
   139  	f, _ := sw.fltab[FilterListen]
   140  	sw.fmu.RUnlock()
   141  
   142  	af, err := f.apply(so)
   143  	if err != nil {
   144  		return err
   145  	}
   146  	so.Err = syscall.Listen(s, backlog)
   147  	if err = af.apply(so); err != nil {
   148  		return err
   149  	}
   150  
   151  	sw.smu.Lock()
   152  	defer sw.smu.Unlock()
   153  	if so.Err != nil {
   154  		sw.stats.getLocked(so.Cookie).ListenFailed++
   155  		return so.Err
   156  	}
   157  	sw.stats.getLocked(so.Cookie).Listened++
   158  	return nil
   159  }
   160  
   161  // AcceptEx wraps [syscall.AcceptEx].
   162  func (sw *Switch) AcceptEx(ls syscall.Handle, as syscall.Handle, b *byte, rxdatalen uint32, laddrlen uint32, raddrlen uint32, rcvd *uint32, overlapped *syscall.Overlapped) error {
   163  	so := sw.sockso(ls)
   164  	if so == nil {
   165  		return syscall.AcceptEx(ls, as, b, rxdatalen, laddrlen, raddrlen, rcvd, overlapped)
   166  	}
   167  	sw.fmu.RLock()
   168  	f, _ := sw.fltab[FilterAccept]
   169  	sw.fmu.RUnlock()
   170  
   171  	af, err := f.apply(so)
   172  	if err != nil {
   173  		return err
   174  	}
   175  	so.Err = syscall.AcceptEx(ls, as, b, rxdatalen, laddrlen, raddrlen, rcvd, overlapped)
   176  	if err = af.apply(so); err != nil {
   177  		return err
   178  	}
   179  
   180  	sw.smu.Lock()
   181  	defer sw.smu.Unlock()
   182  	if so.Err != nil {
   183  		sw.stats.getLocked(so.Cookie).AcceptFailed++
   184  		return so.Err
   185  	}
   186  	nso := sw.addLocked(as, so.Cookie.Family(), so.Cookie.Type(), so.Cookie.Protocol())
   187  	sw.stats.getLocked(nso.Cookie).Accepted++
   188  	return nil
   189  }
   190
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