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https://github.com/golang/go
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519474451a
This is a subset of https://golang.org/cl/20022 with only the copyright header lines, so the next CL will be smaller and more reviewable. Go policy has been single space after periods in comments for some time. The copyright header template at: https://golang.org/doc/contribute.html#copyright also uses a single space. Make them all consistent. Change-Id: Icc26c6b8495c3820da6b171ca96a74701b4a01b0 Reviewed-on: https://go-review.googlesource.com/20111 Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> Reviewed-by: Ian Lance Taylor <iant@golang.org> Reviewed-by: Matthew Dempsky <mdempsky@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org>
120 lines
3.0 KiB
Go
120 lines
3.0 KiB
Go
// Copyright 2012 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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// +build linux
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package syscall_test
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import (
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"bytes"
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"net"
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"os"
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"syscall"
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"testing"
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)
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// TestSCMCredentials tests the sending and receiving of credentials
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// (PID, UID, GID) in an ancillary message between two UNIX
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// sockets. The SO_PASSCRED socket option is enabled on the sending
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// socket for this to work.
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func TestSCMCredentials(t *testing.T) {
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fds, err := syscall.Socketpair(syscall.AF_LOCAL, syscall.SOCK_STREAM, 0)
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if err != nil {
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t.Fatalf("Socketpair: %v", err)
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}
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defer syscall.Close(fds[0])
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defer syscall.Close(fds[1])
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err = syscall.SetsockoptInt(fds[0], syscall.SOL_SOCKET, syscall.SO_PASSCRED, 1)
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if err != nil {
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t.Fatalf("SetsockoptInt: %v", err)
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}
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srvFile := os.NewFile(uintptr(fds[0]), "server")
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defer srvFile.Close()
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srv, err := net.FileConn(srvFile)
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if err != nil {
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t.Errorf("FileConn: %v", err)
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return
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}
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defer srv.Close()
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cliFile := os.NewFile(uintptr(fds[1]), "client")
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defer cliFile.Close()
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cli, err := net.FileConn(cliFile)
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if err != nil {
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t.Errorf("FileConn: %v", err)
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return
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}
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defer cli.Close()
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var ucred syscall.Ucred
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if os.Getuid() != 0 {
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ucred.Pid = int32(os.Getpid())
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ucred.Uid = 0
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ucred.Gid = 0
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oob := syscall.UnixCredentials(&ucred)
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_, _, err := cli.(*net.UnixConn).WriteMsgUnix(nil, oob, nil)
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if op, ok := err.(*net.OpError); ok {
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err = op.Err
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}
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if sys, ok := err.(*os.SyscallError); ok {
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err = sys.Err
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}
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if err != syscall.EPERM {
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t.Fatalf("WriteMsgUnix failed with %v, want EPERM", err)
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}
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}
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ucred.Pid = int32(os.Getpid())
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ucred.Uid = uint32(os.Getuid())
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ucred.Gid = uint32(os.Getgid())
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oob := syscall.UnixCredentials(&ucred)
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// this is going to send a dummy byte
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n, oobn, err := cli.(*net.UnixConn).WriteMsgUnix(nil, oob, nil)
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if err != nil {
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t.Fatalf("WriteMsgUnix: %v", err)
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}
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if n != 0 {
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t.Fatalf("WriteMsgUnix n = %d, want 0", n)
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}
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if oobn != len(oob) {
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t.Fatalf("WriteMsgUnix oobn = %d, want %d", oobn, len(oob))
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}
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oob2 := make([]byte, 10*len(oob))
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n, oobn2, flags, _, err := srv.(*net.UnixConn).ReadMsgUnix(nil, oob2)
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if err != nil {
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t.Fatalf("ReadMsgUnix: %v", err)
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}
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if flags != 0 {
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t.Fatalf("ReadMsgUnix flags = 0x%x, want 0", flags)
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}
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if n != 1 {
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t.Fatalf("ReadMsgUnix n = %d, want 1 (dummy byte)", n)
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}
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if oobn2 != oobn {
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// without SO_PASSCRED set on the socket, ReadMsgUnix will
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// return zero oob bytes
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t.Fatalf("ReadMsgUnix oobn = %d, want %d", oobn2, oobn)
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}
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oob2 = oob2[:oobn2]
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if !bytes.Equal(oob, oob2) {
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t.Fatal("ReadMsgUnix oob bytes don't match")
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}
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scm, err := syscall.ParseSocketControlMessage(oob2)
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if err != nil {
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t.Fatalf("ParseSocketControlMessage: %v", err)
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}
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newUcred, err := syscall.ParseUnixCredentials(&scm[0])
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if err != nil {
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t.Fatalf("ParseUnixCredentials: %v", err)
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}
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if *newUcred != ucred {
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t.Fatalf("ParseUnixCredentials = %+v, want %+v", newUcred, ucred)
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}
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}
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