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-rw-r--r--gpxe/src/include/gpxe/tcp.h12
1 files changed, 12 insertions, 0 deletions
diff --git a/gpxe/src/include/gpxe/tcp.h b/gpxe/src/include/gpxe/tcp.h
index 264ec29b..7ae7eab9 100644
--- a/gpxe/src/include/gpxe/tcp.h
+++ b/gpxe/src/include/gpxe/tcp.h
@@ -9,6 +9,8 @@
*
*/
+FILE_LICENCE ( GPL2_OR_LATER );
+
#include <gpxe/tcpip.h>
/**
@@ -227,6 +229,16 @@ struct tcp_options {
TCP_STATE_SENT ( TCP_FIN ) ) ) \
== TCP_STATE_ACKED ( TCP_SYN ) )
+/** Have ever been fully established
+ *
+ * We have been fully established if we have both received a SYN and
+ * had our own SYN acked.
+ */
+#define TCP_HAS_BEEN_ESTABLISHED(state) \
+ ( ( (state) & ( TCP_STATE_ACKED ( TCP_SYN ) | \
+ TCP_STATE_RCVD ( TCP_SYN ) ) ) \
+ == ( TCP_STATE_ACKED ( TCP_SYN ) | TCP_STATE_RCVD ( TCP_SYN ) ) )
+
/** Have closed gracefully
*
* We have closed gracefully if we have both received a FIN and had