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utils: catch exceptions during reader initalitation 

Failed reader initializations happen frome time to time, mostly because
of messed up commandline arguments. This results in ugly crashes very
often. Lets control this a bit by catching the exception string and
print it.

Change-Id: I313017355da01bbef7c3d3f1899555aadb509319
This commit is contained in:
Philipp Maier 2021-02-22 16:07:53 +01:00
parent bdf3d3597b
commit c8caec2933
3 changed files with 25 additions and 17 deletions
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2
pySim-prog.py
View File

@ -720,6 +720,8 @@ if __name__ == '__main__':
# Init card reader driver
sl = init_reader(opts)
if sl is None:
exit(1)
# Create command layer
scc = SimCardCommands(transport=sl)

2
pySim-read.py
View File

@ -82,6 +82,8 @@ if __name__ == '__main__':
# Init card reader driver
sl = init_reader(opts)
if sl is None:
exit(1)
# Create command layer
scc = SimCardCommands(transport=sl)

38
pySim/utils.py
View File

@ -607,24 +607,28 @@ def init_reader(opts):
"""
Init card reader driver
"""
if opts.pcsc_dev is not None:
print("Using PC/SC reader interface")
from pySim.transport.pcsc import PcscSimLink
sl = PcscSimLink(opts.pcsc_dev)
elif opts.osmocon_sock is not None:
print("Using Calypso-based (OsmocomBB) reader interface")
from pySim.transport.calypso import CalypsoSimLink
sl = CalypsoSimLink(sock_path=opts.osmocon_sock)
elif opts.modem_dev is not None:
print("Using modem for Generic SIM Access (3GPP TS 27.007)")
from pySim.transport.modem_atcmd import ModemATCommandLink
sl = ModemATCommandLink(device=opts.modem_dev, baudrate=opts.modem_baud)
else: # Serial reader is default
print("Using serial reader interface")
from pySim.transport.serial import SerialSimLink
sl = SerialSimLink(device=opts.device, baudrate=opts.baudrate)
try:
if opts.pcsc_dev is not None:
print("Using PC/SC reader interface")
from pySim.transport.pcsc import PcscSimLink
sl = PcscSimLink(opts.pcsc_dev)
elif opts.osmocon_sock is not None:
print("Using Calypso-based (OsmocomBB) reader interface")
from pySim.transport.calypso import CalypsoSimLink
sl = CalypsoSimLink(sock_path=opts.osmocon_sock)
elif opts.modem_dev is not None:
print("Using modem for Generic SIM Access (3GPP TS 27.007)")
from pySim.transport.modem_atcmd import ModemATCommandLink
sl = ModemATCommandLink(device=opts.modem_dev, baudrate=opts.modem_baud)
else: # Serial reader is default
print("Using serial reader interface")
from pySim.transport.serial import SerialSimLink
sl = SerialSimLink(device=opts.device, baudrate=opts.baudrate)
return sl
except Exception as e:
print("Card reader initialization failed with exception:\n" + str(e))
return None
return sl
def enc_ePDGSelection(hexstr, mcc, mnc, epdg_priority='0001', epdg_fqdn_format='00'):
"""