1 files changed, 35 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/cgroup_tcp_skb.h b/tools/testing/selftests/bpf/cgroup_tcp_skb.h
new file mode 100644
index 000000000000..7f6b24f102fb
--- /dev/null
+++ b/tools/testing/selftests/bpf/cgroup_tcp_skb.h
@@ -0,0 +1,35 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright (c) 2023 Meta Platforms, Inc. and affiliates. */
+
+/* Define states of a socket to tracking messages sending to and from the
+ * socket.
+ *
+ * These states are based on rfc9293 with some modifications to support
+ * tracking of messages sent out from a socket. For example, when a SYN is
+ * received, a new socket is transiting to the SYN_RECV state defined in
+ * rfc9293. But, we put it in SYN_RECV_SENDING_SYN_ACK state and when
+ * SYN-ACK is sent out, it moves to SYN_RECV state. With this modification,
+ * we can track the message sent out from a socket.
+ */
+
+#ifndef __CGROUP_TCP_SKB_H__
+#define __CGROUP_TCP_SKB_H__
+
+enum {
+	INIT,
+	CLOSED,
+	SYN_SENT,
+	SYN_RECV_SENDING_SYN_ACK,
+	SYN_RECV,
+	ESTABLISHED,
+	FIN_WAIT1,
+	FIN_WAIT2,
+	CLOSE_WAIT_SENDING_ACK,
+	CLOSE_WAIT,
+	CLOSING,
+	LAST_ACK,
+	TIME_WAIT_SENDING_ACK,
+	TIME_WAIT,
+};
+
+#endif /* __CGROUP_TCP_SKB_H__ */