Qt: add graph of unacked (outstanding) bytes to window scale graph

This metric is commonly used as an estimate of the sender's congestion window.
[ when examining a capture taken from the sender ]

Change-Id: I812d5556cef477c08ef1e5d396fbdddda9a6751e
Reviewed-on: https://code.wireshark.org/review/19661
Petri-Dish: Roland Knall <rknall@gmail.com>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Roland Knall <rknall@gmail.com>

1 files changed, 15 insertions, 0 deletions

diff --git a/ui/tap-tcp-stream.h b/ui/tap-tcp-stream.h
index f430fa5fa5..360f4af016 100644
--- a/ui/tap-tcp-stream.h
+++ b/ui/tap-tcp-stream.h
@@ -114,6 +114,21 @@ struct unack *rtt_get_new_unack(double , unsigned int );
 void rtt_put_unack_on_list(struct unack ** , struct unack * );
 void rtt_delete_unack_from_list(struct unack ** , struct unack * );
 
+static inline int
+tcp_seq_before(guint32 s1, guint32 s2) {
+    return (gint32)(s1 - s2) < 0;
+}
+
+static inline int
+tcp_seq_eq_or_after(guint32 s1, guint32 s2) {
+    return !tcp_seq_before(s1, s2);
+}
+
+static inline int
+tcp_seq_after(guint32 s1, guint32 s2) {
+    return (s1 != s2) && !tcp_seq_before(s1, s2);
+}
+
 
 #ifdef __cplusplus
 }