diff options
Diffstat (limited to 'vendor/github.com/godbus/dbus/v5/transport_unix.go')
| -rw-r--r-- | vendor/github.com/godbus/dbus/v5/transport_unix.go | 214 |
1 files changed, 0 insertions, 214 deletions
diff --git a/vendor/github.com/godbus/dbus/v5/transport_unix.go b/vendor/github.com/godbus/dbus/v5/transport_unix.go deleted file mode 100644 index c7cd02f97..000000000 --- a/vendor/github.com/godbus/dbus/v5/transport_unix.go +++ /dev/null @@ -1,214 +0,0 @@ -//+build !windows,!solaris - -package dbus - -import ( - "bytes" - "encoding/binary" - "errors" - "io" - "net" - "syscall" -) - -type oobReader struct { - conn *net.UnixConn - oob []byte - buf [4096]byte -} - -func (o *oobReader) Read(b []byte) (n int, err error) { - n, oobn, flags, _, err := o.conn.ReadMsgUnix(b, o.buf[:]) - if err != nil { - return n, err - } - if flags&syscall.MSG_CTRUNC != 0 { - return n, errors.New("dbus: control data truncated (too many fds received)") - } - o.oob = append(o.oob, o.buf[:oobn]...) - return n, nil -} - -type unixTransport struct { - *net.UnixConn - rdr *oobReader - hasUnixFDs bool -} - -func newUnixTransport(keys string) (transport, error) { - var err error - - t := new(unixTransport) - abstract := getKey(keys, "abstract") - path := getKey(keys, "path") - switch { - case abstract == "" && path == "": - return nil, errors.New("dbus: invalid address (neither path nor abstract set)") - case abstract != "" && path == "": - t.UnixConn, err = net.DialUnix("unix", nil, &net.UnixAddr{Name: "@" + abstract, Net: "unix"}) - if err != nil { - return nil, err - } - return t, nil - case abstract == "" && path != "": - t.UnixConn, err = net.DialUnix("unix", nil, &net.UnixAddr{Name: path, Net: "unix"}) - if err != nil { - return nil, err - } - return t, nil - default: - return nil, errors.New("dbus: invalid address (both path and abstract set)") - } -} - -func init() { - transports["unix"] = newUnixTransport -} - -func (t *unixTransport) EnableUnixFDs() { - t.hasUnixFDs = true -} - -func (t *unixTransport) ReadMessage() (*Message, error) { - var ( - blen, hlen uint32 - csheader [16]byte - headers []header - order binary.ByteOrder - unixfds uint32 - ) - // To be sure that all bytes of out-of-band data are read, we use a special - // reader that uses ReadUnix on the underlying connection instead of Read - // and gathers the out-of-band data in a buffer. - if t.rdr == nil { - t.rdr = &oobReader{conn: t.UnixConn} - } else { - t.rdr.oob = nil - } - - // read the first 16 bytes (the part of the header that has a constant size), - // from which we can figure out the length of the rest of the message - if _, err := io.ReadFull(t.rdr, csheader[:]); err != nil { - return nil, err - } - switch csheader[0] { - case 'l': - order = binary.LittleEndian - case 'B': - order = binary.BigEndian - default: - return nil, InvalidMessageError("invalid byte order") - } - // csheader[4:8] -> length of message body, csheader[12:16] -> length of - // header fields (without alignment) - binary.Read(bytes.NewBuffer(csheader[4:8]), order, &blen) - binary.Read(bytes.NewBuffer(csheader[12:]), order, &hlen) - if hlen%8 != 0 { - hlen += 8 - (hlen % 8) - } - - // decode headers and look for unix fds - headerdata := make([]byte, hlen+4) - copy(headerdata, csheader[12:]) - if _, err := io.ReadFull(t.rdr, headerdata[4:]); err != nil { - return nil, err - } - dec := newDecoder(bytes.NewBuffer(headerdata), order) - dec.pos = 12 - vs, err := dec.Decode(Signature{"a(yv)"}) - if err != nil { - return nil, err - } - Store(vs, &headers) - for _, v := range headers { - if v.Field == byte(FieldUnixFDs) { - unixfds, _ = v.Variant.value.(uint32) - } - } - all := make([]byte, 16+hlen+blen) - copy(all, csheader[:]) - copy(all[16:], headerdata[4:]) - if _, err := io.ReadFull(t.rdr, all[16+hlen:]); err != nil { - return nil, err - } - if unixfds != 0 { - if !t.hasUnixFDs { - return nil, errors.New("dbus: got unix fds on unsupported transport") - } - // read the fds from the OOB data - scms, err := syscall.ParseSocketControlMessage(t.rdr.oob) - if err != nil { - return nil, err - } - if len(scms) != 1 { - return nil, errors.New("dbus: received more than one socket control message") - } - fds, err := syscall.ParseUnixRights(&scms[0]) - if err != nil { - return nil, err - } - msg, err := DecodeMessage(bytes.NewBuffer(all)) - if err != nil { - return nil, err - } - // substitute the values in the message body (which are indices for the - // array receiver via OOB) with the actual values - for i, v := range msg.Body { - switch v.(type) { - case UnixFDIndex: - j := v.(UnixFDIndex) - if uint32(j) >= unixfds { - return nil, InvalidMessageError("invalid index for unix fd") - } - msg.Body[i] = UnixFD(fds[j]) - case []UnixFDIndex: - idxArray := v.([]UnixFDIndex) - fdArray := make([]UnixFD, len(idxArray)) - for k, j := range idxArray { - if uint32(j) >= unixfds { - return nil, InvalidMessageError("invalid index for unix fd") - } - fdArray[k] = UnixFD(fds[j]) - } - msg.Body[i] = fdArray - } - } - return msg, nil - } - return DecodeMessage(bytes.NewBuffer(all)) -} - -func (t *unixTransport) SendMessage(msg *Message) error { - fds := make([]int, 0) - for i, v := range msg.Body { - if fd, ok := v.(UnixFD); ok { - msg.Body[i] = UnixFDIndex(len(fds)) - fds = append(fds, int(fd)) - } - } - if len(fds) != 0 { - if !t.hasUnixFDs { - return errors.New("dbus: unix fd passing not enabled") - } - msg.Headers[FieldUnixFDs] = MakeVariant(uint32(len(fds))) - oob := syscall.UnixRights(fds...) - buf := new(bytes.Buffer) - msg.EncodeTo(buf, nativeEndian) - n, oobn, err := t.UnixConn.WriteMsgUnix(buf.Bytes(), oob, nil) - if err != nil { - return err - } - if n != buf.Len() || oobn != len(oob) { - return io.ErrShortWrite - } - } else { - if err := msg.EncodeTo(t, nativeEndian); err != nil { - return err - } - } - return nil -} - -func (t *unixTransport) SupportsUnixFDs() bool { - return true -} |