Update repository to the state of the latest kernel patch.

README.md

@@ -5,9 +5,11 @@ Additionally, it is specially suited for 4G/5G cellular networks.
 
 A peer-reviewed [paper on TCP ROCCET](https://opendl.ifip-tc6.org/db/conf/wons/wons2026/1571217211.pdf) was presented at the WONS 2026 conference.
 
+A new performance report for the latest version of TCP ROCCET can be found under "doc/measurements/2026-07-21_performance-report.pdf".
+
 ### Versions
 
-- latest on master branch
+- latest on master branch (requires kernel version 7.1 or higher)
     - Improved min RTT probing
     - Packet pacing
     - Code refactor
@@ -16,6 +18,23 @@ A peer-reviewed [paper on TCP ROCCET](https://opendl.ifip-tc6.org/db/conf/wons/w
 - release-2026-06-12-v1
     - Adds minimum RTT probing
     
+## Install with apt (requires kernel version 6.10 or higher)
+Add tcp-roccet-dkms to your source lists and install:
+
+```
+echo "deb [trusted=yes] https://apt.fury.io/timfuchs/ /" | sudo tee /etc/apt/sources.list.d/tcp-roccet.list
+sudo apt update
+sudo apt install tcp-roccet-dkms
+```
+
+### Loading and using the congestion control
+Note: This change is not persistent, the module will not be loaded at boot.
+
+```
+sudo modprobe tcp_roccet
+sudo sysctl net.ipv4.tcp_congestion_control=roccet
+```
+
 ## Build from source
 
 ### Setup

tcp_roccet.h

@@ -7,23 +7,16 @@
 
 #include <linux/math64.h>
 
-/* State in which roccet currently opperates */
+/* State in which roccet currently operates */
 enum roccet_state {
 	LAUNCH,
 	ORBITER,
+	RTT_PROBE_ENTER,
 	RTT_PROBE,
 	RTT_PROBE_REFILL,
 	DRAIN
 };
 
-/* TCP ROCCET helper type, storing data related to ack counting */
-struct ack_rate {
-	u32 last_rate;	/* Last ACK-rate */
-	u32 last_rate_time;	/* Timestamp of the last ACK-rate */
-	u32 curr_rate;	/* Current ACK-rate */
-	u32 cnt;	/* Used for counting acks */
-};
-
 /* TCP ROCCET struct based on the original BICTCP struct with
  * additions specific to the ROCCET-Algorithm.
  */
@@ -42,24 +35,43 @@ struct roccettcp {
 	u32 tcp_cwnd;	/* estimated tcp cwnd */
 	u32 curr_rtt;	/* last sample rtt of current round */
 
-	u32 roccet_last_event_time_us;	/* The last time ROCCET was
-					 * triggered
-					 */
-	bool ece_received;	/* Set to true if an ECE bit was received */
+	u32 roccet_last_event_time_us;	/* The last time ROCCET was triggered */
 	u32 curr_min_rtt;	/* The current observed minRTT */
 	u32 next_min_rtt_probe;	/* Next time to probe the minRTT */
-	u32 probe_min_rtt_until;	/* End of minRTT probing period */
-	u32 refill_until;       /* End of pipe refill after minRTT probe */
-	u32 cwnd_before_min_rtt_probe;	/* cwnd before min RTT probeing */
+	u32 probe_min_rtt_until;	/* End of minRTT probing period.
+					 * Set while in RTT_PROBE states
+					 */
+	u32 refill_until;	/* End of pipe refill after minRTT probe.
+				 * Set while in RTT_PROBE states
+				 */
+	u32 cwnd_before_min_rtt_probe;	/* cwnd before min RTT probing. */
 	u32 curr_srrtt;	/* srRTT calculated based on the latest ACK */
-	u32 next_srrtt_check;	/* Next check for srRTT */
-	struct ack_rate ack_rate;	/* The last and the current ACK rate */
+	u32 next_srrtt_check_ts;	/* Next check for srRTT */
 	u32 last_rtt;	/* sample rtt of previous round.
 			 * Used for jitter calculation
 			 */
-    enum roccet_state state; /* State in which roccet currently opperates */
+
 	u32 interval_snd_seq_start;
 	u32 interval_una_seq_start;
+
+	u32 ack_rate_last_rate_time;	/* Timestamp of the last ACK-rate */
+	u16 ack_rate_last_rate;	/* Last ACK-rate */
+	u16 ack_rate_curr_rate;	/* Current ACK-rate */
+	u16 ack_rate_cnt;	/* Used for counting acks */
+
+	enum roccet_state state : 3; /* Current operating state of roccet */
+	bool was_idle : 1;	/* Tracks whether the connection was idle
+				 * (had no in-flight packets)
+				 */
+	bool initial_limit_reached: 1;	/* Set to true after the connection
+					 * initially gets cwnd-limited
+					 */
+	bool is_in_initial_launch: 1;	/* true if the connection is in
+					 * the initial launch phase.
+					 */
+	u32 ack_carry_over;	/* Used to carry over leftover acks from
+				 * LAUNCH to ORBITER
+				 */
 };
 
 #endif /* __TCP_ROCCET_H */