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fix(ipv6-route): an RPL routing header inside IPv6 loses its address compression on rebuild #1456
Description
Bug. IPv6.from_data(info) re-expands a compressed RPL routing header. _make_data_type_rpl writes addr.packed without the [cmpr_i:]/[cmpr_e:] slice (pcapkit/protocols/internet/ipv6_route.py:795-797).
Repro on main (b14d676c5):
rt = bytes([59, 2, 3, 1, 0x88, 0, 0, 0]) + bytes(range(1, 17)) # CmprI=CmprE=8, two addresses
raw = IPv6 header (next header 43, src ::1, dst ::2) + rt # 64 octets
len(IPv6.from_data(IPv6(raw, 64).info).data) # 80, not 64An IPv6_Route header parsed on its own round-trips; the loss only happens when it sits inside IPv6.
Activity
test(protocols): edge-case round trips for every layer family (#1202)
JarryShaw commentedon Oct 9, 2026
A worker is on it now, on branch
fix/1456-1457-rpl-routing.test(protocols): edge-case round trips for every layer family (#1202)
test(protocols): edge-case round trips for every layer family (#1202) (…
fix(ipv6-route): rebuild RPL source routes byte for byte (#1456, #1457)…
test(roundtrip): drop the edge-case gaps that #1460, #1462 and #1463 …