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#!/usr/bin/env python
#
# Copyright 2020 Free Software Foundation, Inc.
#
# This file is part of GNU Radio
#
# SPDX-License-Identifier: GPL-3.0-or-later
#
#
from gnuradio import gr, gr_unittest
from gnuradio import fec
from gnuradio import blocks, analog
# This test tries to checks for the kind of buffer overflows in the
# FECAPI convolutional decoder that were fixed in #2965
class test_fecapi_cc_buffer_overflow(gr_unittest.TestCase):
def run_with_frame_len(self, frame_len):
self.tb = gr.top_block()
noise = analog.noise_source_f(analog.GR_GAUSSIAN, 1, 0)
head = blocks.head(gr.sizeof_float, self.n_frames * frame_len)
tag = blocks.stream_to_tagged_stream(
gr.sizeof_float, 1, frame_len, "packet_len")
stream2pdu = blocks.tagged_stream_to_pdu(blocks.float_t, 'packet_len')
viterbi = fec.cc_decoder.make(
frame_len // 2, 7, 2, [79, -109], 0, -1, fec.CC_TERMINATED, False)
cc_decoder = fec.async_decoder(viterbi, False, False, frame_len)
self.tb.connect(noise, head, tag, stream2pdu)
self.tb.msg_connect((stream2pdu, 'pdus'), (cc_decoder, 'in'))
self.tb.run()
# the test is considered successful if it hasn't segfaulted or aborted
self.tb = None
def test_buffer_overflow_00(self):
self.n_frames = 10
for frame_len in range(1000, 2000):
with self.subTest(frame_length=frame_len):
self.run_with_frame_len(frame_len)
if __name__ == '__main__':
gr_unittest.run(test_fecapi_cc_buffer_overflow)
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