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ipv6: tcp: enable flowlabel reflection in some RST packets

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When RST packets are sent because no socket could be found,
it makes sense to use flowlabel_reflect sysctl to decide
if a reflection of the flowlabel is requested.

This extends commit 22b6722bfa ("ipv6: Add sysctl for per
namespace flow label reflection"), for some TCP RST packets.

In order to provide full control of this new feature,
flowlabel_reflect becomes a bitmask.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet
2019-06-05 07:55:09 -07:00
committed by David S. Miller
parent e736bf72af
commit 323a53c412
4 changed files with 29 additions and 9 deletions
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3
net/ipv6/sysctl_net_ipv6.c
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@@ -23,6 +23,7 @@
static int zero;
static int one = 1;
static int three = 3;
static int auto_flowlabels_min;
static int auto_flowlabels_max = IP6_AUTO_FLOW_LABEL_MAX;
@@ -114,6 +115,8 @@ static struct ctl_table ipv6_table_template[] = {
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec,
.extra1 = &zero,
.extra2 = &three,
},
{
.procname = "max_dst_opts_number",