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Index: sys/netinet/tcp.h
===================================================================
--- sys/netinet/tcp.h
+++ sys/netinet/tcp.h
@@ -71,8 +71,9 @@
#define TH_URG 0x20
#define TH_ECE 0x40
#define TH_CWR 0x80
+#define TH_AE 0x100 /* maps into th_x2 */
#define TH_FLAGS (TH_FIN|TH_SYN|TH_RST|TH_PUSH|TH_ACK|TH_URG|TH_ECE|TH_CWR)
-#define PRINT_TH_FLAGS "\20\1FIN\2SYN\3RST\4PUSH\5ACK\6URG\7ECE\10CWR"
+#define PRINT_TH_FLAGS "\20\1FIN\2SYN\3RST\4PUSH\5ACK\6URG\7ECE\10CWR\11AE"
u_short th_win; /* window */
u_short th_sum; /* checksum */
Index: sys/netinet/tcp_syncache.h
===================================================================
--- sys/netinet/tcp_syncache.h
+++ sys/netinet/tcp_syncache.h
@@ -90,6 +90,10 @@
#define SCF_SIGNATURE 0x20 /* send MD5 digests */
#define SCF_SACK 0x80 /* send SACK option */
#define SCF_ECN 0x100 /* send ECN setup packet */
+#define SCF_ACE_N 0x200 /* send ACE non-ECT setup */
+#define SCF_ACE_0 0x400 /* send ACE ECT0 setup */
+#define SCF_ACE_1 0x800 /* send ACE ECT1 setup */
+#define SCF_ACE_CE 0x1000 /* send ACE CE setup */
struct syncache_head {
struct mtx sch_mtx;
Index: sys/netinet/tcp_var.h
===================================================================
--- sys/netinet/tcp_var.h
+++ sys/netinet/tcp_var.h
@@ -326,6 +326,8 @@
#define TF_NEEDFIN 0x000800 /* send FIN (implicit state) */
#define TF_NOPUSH 0x001000 /* don't push */
#define TF_PREVVALID 0x002000 /* saved values for bad rxmit valid */
+#define TF_ACE_PERMIT 0x00004000 /* Accurate ECN mode */
+#define TF_UNUSED1 0x00008000 /* unused flag bit 1 */
#define TF_MORETOCOME 0x010000 /* More data to be appended to sock */
#define TF_LQ_OVERFLOW 0x020000 /* listen queue overflow */
#define TF_LASTIDLE 0x040000 /* connection was previously idle */

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