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tests: amend IPv6 reassembly test for empty fragments

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Co-authored-by: Nils Bernsdorf <nibe00018@stud.uni-saarland.de>
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Martine Lenders 2025-12-05 17:43:56 +01:00
parent 8af2f50a7d
commit af2bf2527c
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1 changed files with 17 additions and 0 deletions
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17
tests/net/gnrc_ipv6_ext_frag/tests-as-root/01-run.py
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@ -156,6 +156,22 @@ def test_reass_offset_too_large(child, iface, hw_dst, ll_dst, ll_src):
pktbuf_empty(child)
def test_reass_empty_fragment(child, iface, hw_dst, ll_dst, ll_src):
# Originally proposed by Nils Bernsdorf (Uni Saarland), adapted by Martine Lenders
# send the first packet (without payload) to initialize the reassembly buffer
# with a null pointer
sendp(Ether(dst=hw_dst) / IPv6(dst=ll_dst, src=ll_src) /
IPv6ExtHdrFragment(id=0xabcd, nh=0, m=1, offset=0),
iface=iface, verbose=0)
# send the second packet to potentially trigger a memcpy
sendp(Ether(dst=hw_dst) / IPv6(dst=ll_dst, src=ll_src) /
IPv6ExtHdrFragment(id=0xabcd, nh=0, m=1, offset=0) /
(b"A" * (24 - 8)),
iface=iface, verbose=0)
time.sleep(11) # let reassembly buffer garbage collect
pktbuf_empty(child)
def test_reass_first_fragment_repeat(child, iface, hw_dst, ll_dst, ll_src):
# Originally proposed by Nils Bernsdorf (Uni Saarland), adapted by Martine Lenders
# send the first packet to initialize the reassembly buffer
@ -439,6 +455,7 @@ def testfunc(child):
run(test_reass_successful_udp)
run(test_reass_too_short_header)
run(test_reass_offset_too_large)
run(test_reass_empty_fragment)
run(test_reass_first_fragment_repeat)
print("SUCCESS")