root / lib / confd / __init__.py @ f7f03738
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# Copyright (C) 2009, 2012 Google Inc.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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# 02110-1301, USA.
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"""Ganeti confd client/server library
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"""
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from ganeti import constants |
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from ganeti import errors |
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from ganeti import ht |
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_FOURCC_LEN = 4
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#: Items in the individual rows of the NodeDrbd query
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_HTNodeDrbdItems = [ht.TString, ht.TInt, ht.TString, |
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ht.TString, ht.TString, ht.TString] |
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#: Type for the (top-level) result of NodeDrbd query
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HTNodeDrbd = ht.TListOf(ht.TAnd(ht.TList, ht.TIsLength(len(_HTNodeDrbdItems)),
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ht.TItems(_HTNodeDrbdItems))) |
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def PackMagic(payload): |
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"""Prepend the confd magic fourcc to a payload.
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"""
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return "".join([constants.CONFD_MAGIC_FOURCC, payload]) |
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def UnpackMagic(payload): |
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"""Unpack and check the confd magic fourcc from a payload.
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"""
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if len(payload) < _FOURCC_LEN: |
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raise errors.ConfdMagicError("UDP payload too short to contain the" |
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" fourcc code")
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magic_number = payload[:_FOURCC_LEN] |
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if magic_number != constants.CONFD_MAGIC_FOURCC:
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raise errors.ConfdMagicError("UDP payload contains an unkown fourcc") |
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return payload[_FOURCC_LEN:]
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