github.com/gogf/gkafka@v1.0.1-0.20190702070843-033a14468069/third/golang.org/x/sys/unix/creds_test.go (about)

     1  // Copyright 2012 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  // +build linux
     6  
     7  package unix_test
     8  
     9  import (
    10  	"bytes"
    11  	"go/build"
    12  	"net"
    13  	"os"
    14  	"testing"
    15  
    16  	"github.com/gogf/gkafka/third/golang.org/x/sys/unix"
    17  )
    18  
    19  // TestSCMCredentials tests the sending and receiving of credentials
    20  // (PID, UID, GID) in an ancillary message between two UNIX
    21  // sockets. The SO_PASSCRED socket option is enabled on the sending
    22  // socket for this to work.
    23  func TestSCMCredentials(t *testing.T) {
    24  	socketTypeTests := []struct {
    25  		socketType int
    26  		dataLen    int
    27  	}{
    28  		{
    29  			unix.SOCK_STREAM,
    30  			1,
    31  		}, {
    32  			unix.SOCK_DGRAM,
    33  			0,
    34  		},
    35  	}
    36  
    37  	for _, tt := range socketTypeTests {
    38  		if tt.socketType == unix.SOCK_DGRAM && !atLeast1p10() {
    39  			t.Log("skipping DGRAM test on pre-1.10")
    40  			continue
    41  		}
    42  
    43  		fds, err := unix.Socketpair(unix.AF_LOCAL, tt.socketType, 0)
    44  		if err != nil {
    45  			t.Fatalf("Socketpair: %v", err)
    46  		}
    47  		defer unix.Close(fds[0])
    48  		defer unix.Close(fds[1])
    49  
    50  		err = unix.SetsockoptInt(fds[0], unix.SOL_SOCKET, unix.SO_PASSCRED, 1)
    51  		if err != nil {
    52  			t.Fatalf("SetsockoptInt: %v", err)
    53  		}
    54  
    55  		srvFile := os.NewFile(uintptr(fds[0]), "server")
    56  		defer srvFile.Close()
    57  		srv, err := net.FileConn(srvFile)
    58  		if err != nil {
    59  			t.Errorf("FileConn: %v", err)
    60  			return
    61  		}
    62  		defer srv.Close()
    63  
    64  		cliFile := os.NewFile(uintptr(fds[1]), "client")
    65  		defer cliFile.Close()
    66  		cli, err := net.FileConn(cliFile)
    67  		if err != nil {
    68  			t.Errorf("FileConn: %v", err)
    69  			return
    70  		}
    71  		defer cli.Close()
    72  
    73  		var ucred unix.Ucred
    74  		ucred.Pid = int32(os.Getpid())
    75  		ucred.Uid = uint32(os.Getuid())
    76  		ucred.Gid = uint32(os.Getgid())
    77  		oob := unix.UnixCredentials(&ucred)
    78  
    79  		// On SOCK_STREAM, this is internally going to send a dummy byte
    80  		n, oobn, err := cli.(*net.UnixConn).WriteMsgUnix(nil, oob, nil)
    81  		if err != nil {
    82  			t.Fatalf("WriteMsgUnix: %v", err)
    83  		}
    84  		if n != 0 {
    85  			t.Fatalf("WriteMsgUnix n = %d, want 0", n)
    86  		}
    87  		if oobn != len(oob) {
    88  			t.Fatalf("WriteMsgUnix oobn = %d, want %d", oobn, len(oob))
    89  		}
    90  
    91  		oob2 := make([]byte, 10*len(oob))
    92  		n, oobn2, flags, _, err := srv.(*net.UnixConn).ReadMsgUnix(nil, oob2)
    93  		if err != nil {
    94  			t.Fatalf("ReadMsgUnix: %v", err)
    95  		}
    96  		if flags != 0 {
    97  			t.Fatalf("ReadMsgUnix flags = 0x%x, want 0", flags)
    98  		}
    99  		if n != tt.dataLen {
   100  			t.Fatalf("ReadMsgUnix n = %d, want %d", n, tt.dataLen)
   101  		}
   102  		if oobn2 != oobn {
   103  			// without SO_PASSCRED set on the socket, ReadMsgUnix will
   104  			// return zero oob bytes
   105  			t.Fatalf("ReadMsgUnix oobn = %d, want %d", oobn2, oobn)
   106  		}
   107  		oob2 = oob2[:oobn2]
   108  		if !bytes.Equal(oob, oob2) {
   109  			t.Fatal("ReadMsgUnix oob bytes don't match")
   110  		}
   111  
   112  		scm, err := unix.ParseSocketControlMessage(oob2)
   113  		if err != nil {
   114  			t.Fatalf("ParseSocketControlMessage: %v", err)
   115  		}
   116  		newUcred, err := unix.ParseUnixCredentials(&scm[0])
   117  		if err != nil {
   118  			t.Fatalf("ParseUnixCredentials: %v", err)
   119  		}
   120  		if *newUcred != ucred {
   121  			t.Fatalf("ParseUnixCredentials = %+v, want %+v", newUcred, ucred)
   122  		}
   123  	}
   124  }
   125  
   126  // atLeast1p10 reports whether we are running on Go 1.10 or later.
   127  func atLeast1p10() bool {
   128  	for _, ver := range build.Default.ReleaseTags {
   129  		if ver == "go1.10" {
   130  			return true
   131  		}
   132  	}
   133  	return false
   134  }