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diff --git a/sys/netinet/tcp_ecn.c b/sys/netinet/tcp_ecn.c
--- a/sys/netinet/tcp_ecn.c
+++ b/sys/netinet/tcp_ecn.c
@@ -101,6 +101,24 @@
#include <netinet/tcpip.h>
#include <netinet/tcp_ecn.h>
+static SYSCTL_NODE(_net_inet_tcp, OID_AUTO, ecn,
+ CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
+ "TCP ECN");
+
+VNET_DEFINE(int, tcp_do_ecn) = 2;
+SYSCTL_INT(_net_inet_tcp_ecn, OID_AUTO, enable,
+ CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(tcp_do_ecn), 0,
+ "TCP ECN support");
+
+VNET_DEFINE(int, tcp_ecn_maxretries) = 1;
+SYSCTL_INT(_net_inet_tcp_ecn, OID_AUTO, maxretries,
+ CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(tcp_ecn_maxretries), 0,
+ "Max retries before giving up on ECN");
+
+VNET_DEFINE(int, tcp_ecn_option) = 0;
+SYSCTL_INT(_net_inet_tcp_ecn, OID_AUTO, option,
+ CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(tcp_ecn_option), 0,
+ "Use AccECN TCP option");
/*
* Process incoming SYN,ACK packet
diff --git a/sys/netinet/tcp_input.c b/sys/netinet/tcp_input.c
--- a/sys/netinet/tcp_input.c
+++ b/sys/netinet/tcp_input.c
@@ -204,20 +204,6 @@
&VNET_NAME(tcp_abc_l_var), 2,
"Cap the max cwnd increment during slow-start to this number of segments");
-static SYSCTL_NODE(_net_inet_tcp, OID_AUTO, ecn,
- CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
- "TCP ECN");
-
-VNET_DEFINE(int, tcp_do_ecn) = 2;
-SYSCTL_INT(_net_inet_tcp_ecn, OID_AUTO, enable, CTLFLAG_VNET | CTLFLAG_RW,
- &VNET_NAME(tcp_do_ecn), 0,
- "TCP ECN support");
-
-VNET_DEFINE(int, tcp_ecn_maxretries) = 1;
-SYSCTL_INT(_net_inet_tcp_ecn, OID_AUTO, maxretries, CTLFLAG_VNET | CTLFLAG_RW,
- &VNET_NAME(tcp_ecn_maxretries), 0,
- "Max retries before giving up on ECN");
-
VNET_DEFINE(int, tcp_insecure_syn) = 0;
SYSCTL_INT(_net_inet_tcp, OID_AUTO, insecure_syn, CTLFLAG_VNET | CTLFLAG_RW,
&VNET_NAME(tcp_insecure_syn), 0,

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