diff options
Diffstat (limited to 'vendor/github.com/fsouza/go-dockerclient/external/golang.org/x/sys/unix/sockcmsg_unix.go')
-rw-r--r-- | vendor/github.com/fsouza/go-dockerclient/external/golang.org/x/sys/unix/sockcmsg_unix.go | 103 |
1 files changed, 0 insertions, 103 deletions
diff --git a/vendor/github.com/fsouza/go-dockerclient/external/golang.org/x/sys/unix/sockcmsg_unix.go b/vendor/github.com/fsouza/go-dockerclient/external/golang.org/x/sys/unix/sockcmsg_unix.go deleted file mode 100644 index 70af5a7..0000000 --- a/vendor/github.com/fsouza/go-dockerclient/external/golang.org/x/sys/unix/sockcmsg_unix.go +++ /dev/null | |||
@@ -1,103 +0,0 @@ | |||
1 | // Copyright 2011 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 darwin dragonfly freebsd linux netbsd openbsd solaris | ||
6 | |||
7 | // Socket control messages | ||
8 | |||
9 | package unix | ||
10 | |||
11 | import "unsafe" | ||
12 | |||
13 | // Round the length of a raw sockaddr up to align it properly. | ||
14 | func cmsgAlignOf(salen int) int { | ||
15 | salign := sizeofPtr | ||
16 | // NOTE: It seems like 64-bit Darwin and DragonFly BSD kernels | ||
17 | // still require 32-bit aligned access to network subsystem. | ||
18 | if darwin64Bit || dragonfly64Bit { | ||
19 | salign = 4 | ||
20 | } | ||
21 | return (salen + salign - 1) & ^(salign - 1) | ||
22 | } | ||
23 | |||
24 | // CmsgLen returns the value to store in the Len field of the Cmsghdr | ||
25 | // structure, taking into account any necessary alignment. | ||
26 | func CmsgLen(datalen int) int { | ||
27 | return cmsgAlignOf(SizeofCmsghdr) + datalen | ||
28 | } | ||
29 | |||
30 | // CmsgSpace returns the number of bytes an ancillary element with | ||
31 | // payload of the passed data length occupies. | ||
32 | func CmsgSpace(datalen int) int { | ||
33 | return cmsgAlignOf(SizeofCmsghdr) + cmsgAlignOf(datalen) | ||
34 | } | ||
35 | |||
36 | func cmsgData(h *Cmsghdr) unsafe.Pointer { | ||
37 | return unsafe.Pointer(uintptr(unsafe.Pointer(h)) + uintptr(cmsgAlignOf(SizeofCmsghdr))) | ||
38 | } | ||
39 | |||
40 | // SocketControlMessage represents a socket control message. | ||
41 | type SocketControlMessage struct { | ||
42 | Header Cmsghdr | ||
43 | Data []byte | ||
44 | } | ||
45 | |||
46 | // ParseSocketControlMessage parses b as an array of socket control | ||
47 | // messages. | ||
48 | func ParseSocketControlMessage(b []byte) ([]SocketControlMessage, error) { | ||
49 | var msgs []SocketControlMessage | ||
50 | i := 0 | ||
51 | for i+CmsgLen(0) <= len(b) { | ||
52 | h, dbuf, err := socketControlMessageHeaderAndData(b[i:]) | ||
53 | if err != nil { | ||
54 | return nil, err | ||
55 | } | ||
56 | m := SocketControlMessage{Header: *h, Data: dbuf} | ||
57 | msgs = append(msgs, m) | ||
58 | i += cmsgAlignOf(int(h.Len)) | ||
59 | } | ||
60 | return msgs, nil | ||
61 | } | ||
62 | |||
63 | func socketControlMessageHeaderAndData(b []byte) (*Cmsghdr, []byte, error) { | ||
64 | h := (*Cmsghdr)(unsafe.Pointer(&b[0])) | ||
65 | if h.Len < SizeofCmsghdr || int(h.Len) > len(b) { | ||
66 | return nil, nil, EINVAL | ||
67 | } | ||
68 | return h, b[cmsgAlignOf(SizeofCmsghdr):h.Len], nil | ||
69 | } | ||
70 | |||
71 | // UnixRights encodes a set of open file descriptors into a socket | ||
72 | // control message for sending to another process. | ||
73 | func UnixRights(fds ...int) []byte { | ||
74 | datalen := len(fds) * 4 | ||
75 | b := make([]byte, CmsgSpace(datalen)) | ||
76 | h := (*Cmsghdr)(unsafe.Pointer(&b[0])) | ||
77 | h.Level = SOL_SOCKET | ||
78 | h.Type = SCM_RIGHTS | ||
79 | h.SetLen(CmsgLen(datalen)) | ||
80 | data := cmsgData(h) | ||
81 | for _, fd := range fds { | ||
82 | *(*int32)(data) = int32(fd) | ||
83 | data = unsafe.Pointer(uintptr(data) + 4) | ||
84 | } | ||
85 | return b | ||
86 | } | ||
87 | |||
88 | // ParseUnixRights decodes a socket control message that contains an | ||
89 | // integer array of open file descriptors from another process. | ||
90 | func ParseUnixRights(m *SocketControlMessage) ([]int, error) { | ||
91 | if m.Header.Level != SOL_SOCKET { | ||
92 | return nil, EINVAL | ||
93 | } | ||
94 | if m.Header.Type != SCM_RIGHTS { | ||
95 | return nil, EINVAL | ||
96 | } | ||
97 | fds := make([]int, len(m.Data)>>2) | ||
98 | for i, j := 0, 0; i < len(m.Data); i += 4 { | ||
99 | fds[j] = int(*(*int32)(unsafe.Pointer(&m.Data[i]))) | ||
100 | j++ | ||
101 | } | ||
102 | return fds, nil | ||
103 | } | ||