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Commit fde98ae9 authored by Peilin Ye's avatar Peilin Ye Committed by David S. Miller
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ip6_gre: Make o_seqno start from 0 in native mode



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: c12b395a ("gre: Support GRE over IPv6")
Signed-off-by: default avatarPeilin Ye <peilin.ye@bytedance.com>
Acked-by: default avatarWilliam Tu <u9012063@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent ff827beb
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