def m2i(self, pkt, m):
"""
Try to parse one of the TLS subprotocols (ccs, alert, handshake or
application_data). This is used inside a loop managed by .getfield().
"""
cls = Raw
if pkt.type == 22:
if len(m) >= 1:
msgtype = orb(m[0])
cls = _tls_handshake_cls.get(msgtype, Raw)
elif pkt.type == 20:
cls = TLSChangeCipherSpec
elif pkt.type == 21:
cls = TLSAlert
elif pkt.type == 23:
cls = TLSApplicationData
if cls is Raw:
return Raw(m)
else:
try:
return cls(m, tls_session=pkt.tls_session)
except:
if conf.debug_dissector:
raise
return Raw(m)
def m2i(self, pkt, m):
"""
Try to parse one of the TLS subprotocols (ccs, alert, handshake or
application_data). This is used inside a loop managed by .getfield().
"""
cls = Raw
if pkt.type == 22:
if len(m) >= 1:
msgtype = orb(m[0])
cls = _tls_handshake_cls.get(msgtype, Raw)
elif pkt.type == 20:
cls = TLSChangeCipherSpec
elif pkt.type == 21:
cls = TLSAlert
elif pkt.type == 23:
cls = TLSApplicationData
if cls is Raw:
return Raw(m)
else:
try:
return cls(m, tls_session=pkt.tls_session)
except Exception:
if conf.debug_dissector:
raise
return Raw(m)
def m2i(self, pkt, m):
"""
Try to parse one of the TLS subprotocols (ccs, alert, handshake or
application_data). This is used inside a loop managed by .getfield().
"""
cls = Raw
if pkt.type == 22:
if len(m) >= 1:
msgtype = orb(m[0])
# If a version was agreed on by both client and server,
# we use it (tls_session.tls_version)
# Otherwise, if the client advertised for TLS 1.3, we try to
# dissect the following packets (most likely, server hello)
# using TLS 1.3. The serverhello is able to fallback on
# TLS 1.2 if necessary. In any case, this will set the agreed
# version so that all future packets are correct.
if ((pkt.tls_session.advertised_tls_version == 0x0304
and pkt.tls_session.tls_version is None)
or pkt.tls_session.tls_version == 0x0304):
cls = _tls13_handshake_cls.get(msgtype, Raw)
else:
cls = _tls_handshake_cls.get(msgtype, Raw)
elif pkt.type == 20:
cls = TLSChangeCipherSpec
elif pkt.type == 21:
cls = TLSAlert
elif pkt.type == 23:
cls = TLSApplicationData
if cls is Raw:
return Raw(m)
else:
try:
return cls(m, tls_session=pkt.tls_session)
except Exception:
if conf.debug_dissector:
raise
return Raw(m)
