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pycrate_osmo.RRCTL: add SecMode message for setting EEA/EIA

This commit is contained in:
Vadim Yanitskiy 2022-02-01 01:31:08 +06:00 committed by Vadim Yanitskiy
parent d7804463f6
commit 2520b19588
1 changed files with 17 additions and 0 deletions
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17
pycrate_osmo/RRCTL.py
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@ -50,6 +50,7 @@ class RRCTLMsgType(enum.IntEnum):
ConnRelease = 0x05
Paging = 0x06
Param = 0x07
SecMode = 0x08
RRCTLMsgType_dict = { e.value : e.name for e in RRCTLMsgType }
@ -144,6 +145,21 @@ class ParamReq(Envelope):
Envelope.__init__(self, *args, **kwargs)
self['Len'].set_valauto(lambda: self['Data'].get_len())
class SecModeReq(Envelope):
_GEN = (
Uint('EEA', bl=3),
Uint('EIA', bl=3),
Uint('ResetTxCTR', bl=1),
Uint('ResetRxCTR', bl=1),
Buf('Spare', bl=24),
Buf('KASME', bl=32 * 8), # optional
)
def __init__(self, *args, **kwargs):
Envelope.__init__(self, *args, **kwargs)
# KASME is absent when neither encryption nor integrity protection is active
self['KASME'].set_transauto(lambda: not self['EEA']() and not self['EIA']())
#------------------------------------------------------------------------------#
# RRCTL message definition
#------------------------------------------------------------------------------#
@ -168,6 +184,7 @@ class RRCTLMsg(Envelope):
(RRCTLMsgType.ConnData, RRCTLMsgDisc.Ind) : ConnDataReqInd(),
(RRCTLMsgType.Paging, RRCTLMsgDisc.Ind) : PagingInd(),
(RRCTLMsgType.Param, RRCTLMsgDisc.Req) : ParamReq(),
(RRCTLMsgType.SecMode, RRCTLMsgDisc.Req) : SecModeReq(),
},
sel=lambda self: (self.get_env()['Hdr']['Type'].get_val(),
self.get_env()['Hdr']['Disc'].get_val()))