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https://gitea.osmocom.org/sim-card/pysim.git
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162ba3af3e
The trace log currently does not contain any information about card resets. This makes the trace difficult to follow. Let's use the CardReset object to display the ATR in the trace. Related: OS#6094 Change-Id: Ia550a8bd2f45d2ad622cb2ac2a2905397db76bce
58 lines
2.5 KiB
Python
58 lines
2.5 KiB
Python
# coding=utf-8
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# (C) 2022 by Harald Welte <laforge@osmocom.org>
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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,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU 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, see <http://www.gnu.org/licenses/>.
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from pySim.gsmtap import GsmtapMessage, GsmtapSource
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from . import ApduSource, PacketType, CardReset
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from pySim.apdu.ts_102_221 import ApduCommands as UiccApduCommands
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from pySim.apdu.ts_31_102 import ApduCommands as UsimApduCommands
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from pySim.apdu.global_platform import ApduCommands as GpApduCommands
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ApduCommands = UiccApduCommands + UsimApduCommands + GpApduCommands
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class GsmtapApduSource(ApduSource):
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"""ApduSource for handling GSMTAP-SIM messages received via UDP, such as
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those generated by simtrace2-sniff. Note that *if* you use IP loopback
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and localhost addresses (which is the default), you will need to start
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this source before starting simtrace2-sniff, as otherwise the latter will
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claim the GSMTAP UDP port.
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"""
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def __init__(self, bind_ip:str='127.0.0.1', bind_port:int=4729):
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"""Create a UDP socket for receiving GSMTAP-SIM messages.
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Args:
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bind_ip: IP address to which the socket should be bound (default: 127.0.0.1)
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bind_port: UDP port number to which the socket should be bound (default: 4729)
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"""
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super().__init__()
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self.gsmtap = GsmtapSource(bind_ip, bind_port)
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def read_packet(self) -> PacketType:
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gsmtap_msg, addr = self.gsmtap.read_packet()
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if gsmtap_msg['type'] != 'sim':
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raise ValueError('Unsupported GSMTAP type %s' % gsmtap_msg['type'])
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sub_type = gsmtap_msg['sub_type']
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if sub_type == 'apdu':
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return ApduCommands.parse_cmd_bytes(gsmtap_msg['body'])
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elif sub_type == 'atr':
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# card has been reset
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return CardReset(gsmtap_msg['body'])
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elif sub_type in ['pps_req', 'pps_rsp']:
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# simply ignore for now
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pass
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else:
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raise ValueError('Unsupported GSMTAP-SIM sub-type %s' % sub_type)
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