rtl839x_write_pie_templated() writes an IPv6 destination 16 bits per
template field, DIP0 the lowest and DIP7 the highest. The reader builds
it at DIP2 from whole register words instead, as the RTL838x reader
does, and skips DIP3 to DIP7, so a rule matching an IPv6 destination
reads back with the wrong address and mask. Read each field back into
the 16 bits it was written from; DIP0 and DIP1 fill the IPv6 address as
well as the IPv4 one.
No RTL839x rule matches an IPv6 destination yet; the following patches
add some and dump them through debugfs. On an HPE 1920-48G (RTL8393)
with them the dump showed the switch's IPv6 addresses and prefixes as
configured, e.g. fd00:90:3::1/128 and fd00:90:3::/64.
Assisted-by: Claude:claude-opus-5-5
Signed-off-by: Gennaro Cimmino <gcimmino@rayonra.net>
Link: https://github.com/openwrt/openwrt/pull/25838
Signed-off-by: Markus Stockhausen <markus.stockhausen@gmx.de>
Gennaro Cimmino
724cf05db2