forked from github/multus-cni
ac21a96804
gomodule is still in progress to migrate for now, hence multus team decide to keep vendor directory to support build without gomodule.
37 lines
1.0 KiB
Go
37 lines
1.0 KiB
Go
// Copyright 2011 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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// Socket control messages
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package unix
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import "unsafe"
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// UnixCredentials encodes credentials into a socket control message
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// for sending to another process. This can be used for
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// authentication.
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func UnixCredentials(ucred *Ucred) []byte {
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b := make([]byte, CmsgSpace(SizeofUcred))
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h := (*Cmsghdr)(unsafe.Pointer(&b[0]))
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h.Level = SOL_SOCKET
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h.Type = SCM_CREDENTIALS
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h.SetLen(CmsgLen(SizeofUcred))
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*((*Ucred)(cmsgData(h))) = *ucred
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return b
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}
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// ParseUnixCredentials decodes a socket control message that contains
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// credentials in a Ucred structure. To receive such a message, the
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// SO_PASSCRED option must be enabled on the socket.
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func ParseUnixCredentials(m *SocketControlMessage) (*Ucred, error) {
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if m.Header.Level != SOL_SOCKET {
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return nil, EINVAL
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}
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if m.Header.Type != SCM_CREDENTIALS {
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return nil, EINVAL
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}
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ucred := *(*Ucred)(unsafe.Pointer(&m.Data[0]))
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return &ucred, nil
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}
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