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pySim-trace: Add support for reading GSMTAP from pcap files

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So far we supported
* GSMTAP live traces via a UDP socket
* RSPRO traces from pcap files (or live)

We were lacking support for reading GSMTAP stored in pcap, which
is what this patch implements.

Change-Id: I46d42774b39a2735500ff5804206ddcfa545568c
This commit is contained in:
Harald Welte
2022-12-02 22:50:35 +01:00
parent 284ac104af
commit c95f6e2124
2 changed files with 98 additions and 0 deletions
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8
pySim-trace.py
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@@ -18,6 +18,7 @@ from pySim.transport import LinkBase
from pySim.apdu_source.gsmtap import GsmtapApduSource
from pySim.apdu_source.pyshark_rspro import PysharkRsproPcap, PysharkRsproLive
from pySim.apdu_source.pyshark_gsmtap import PysharkGsmtapPcap
from pySim.apdu.ts_102_221 import UiccSelect, UiccStatus
@@ -130,6 +131,11 @@ parser_gsmtap.add_argument('-i', '--bind-ip', default='127.0.0.1',
parser_gsmtap.add_argument('-p', '--bind-port', default=4729,
help='Local UDP port')
parser_gsmtap_pyshark_pcap = subparsers.add_parser('gsmtap-pyshark-pcap', help="""
PCAP file containing GSMTAP (SIM APDU) communication; processed via pyshark.""")
parser_gsmtap_pyshark_pcap.add_argument('-f', '--pcap-file', required=True,
help='Name of the PCAP[ng] file to be read')
parser_rspro_pyshark_pcap = subparsers.add_parser('rspro-pyshark-pcap', help="""
PCAP file containing RSPRO (osmo-remsim) communication; processed via pyshark.
REQUIRES OSMOCOM PATCHED WIRESHARK!""")
@@ -153,6 +159,8 @@ if __name__ == '__main__':
s = PysharkRsproPcap(opts.pcap_file)
elif opts.source == 'rspro-pyshark-live':
s = PysharkRsproLive(opts.interface)
elif opts.source == 'gsmtap-pyshark-pcap':
s = PysharkGsmtapPcap(opts.pcap_file)
tracer = Tracer(source=s, suppress_status=opts.suppress_status, suppress_select=opts.suppress_select)
logger.info('Entering main loop...')