Re: [PATCH net 2/3] ip6_gre: Make o_seqno start from 0 in native mode
From: William Tu <hidden>
Date: 2022-04-22 16:26:47
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On Thu, Apr 21, 2022 at 3:08 PM Peilin Ye [off-list ref] wrote:
From: Peilin Ye <redacted>
For IP6GRE and IP6GRETAP devices, currently o_seqno starts from 1 in
native mode. According to RFC 2890 2.2., "The first datagram is sent
with a sequence number of 0." Fix it.
It is worth mentioning that o_seqno already starts from 0 in collect_md
mode, see the "if (tunnel->parms.collect_md)" clause in __gre6_xmit(),
where tunnel->o_seqno is passed to gre_build_header() before getting
incremented.
Fixes: c12b395a4664 ("gre: Support GRE over IPv6")
Signed-off-by: Peilin Ye <redacted>LGTM Acked-by: William Tu <redacted>