From 8e4c76b1c5897fb13131a825a53402ac4dd2b2c5 Mon Sep 17 00:00:00 2001
From: Timon <timonpost@hotmail.nl>
Date: Wed, 20 Oct 2021 15:51:22 +0200
Subject: [PATCH] Remove congestion control, since its results are never
 exposed or used internally. (#302)

---
 src/infrastructure.rs         |  2 --
 src/net.rs                    |  2 --
 src/net/virtual_connection.rs | 27 ++++++++++++++++-----------
 src/sequence_buffer.rs        |  2 --
 4 files changed, 16 insertions(+), 17 deletions(-)

diff --git a/src/infrastructure.rs b/src/infrastructure.rs
index de6a8c5c..d3c068c5 100644
--- a/src/infrastructure.rs
+++ b/src/infrastructure.rs
@@ -3,11 +3,9 @@
 
 pub use self::acknowledgment::AcknowledgmentHandler;
 pub use self::acknowledgment::SentPacket;
-pub use self::congestion::CongestionHandler;
 pub use self::fragmenter::Fragmentation;
 
 mod acknowledgment;
-mod congestion;
 mod fragmenter;
 
 pub mod arranging;
diff --git a/src/net.rs b/src/net.rs
index 7b7a5949..ecd466c9 100644
--- a/src/net.rs
+++ b/src/net.rs
@@ -5,7 +5,6 @@ pub use self::connection::{Connection, ConnectionEventAddress, ConnectionMesseng
 pub use self::connection_manager::{ConnectionManager, DatagramSocket};
 pub use self::events::SocketEvent;
 pub use self::link_conditioner::LinkConditioner;
-pub use self::quality::{NetworkQuality, RttMeasurer};
 pub use self::socket::Socket;
 pub use self::virtual_connection::VirtualConnection;
 
@@ -14,7 +13,6 @@ mod connection_impl;
 mod connection_manager;
 mod events;
 mod link_conditioner;
-mod quality;
 mod socket;
 mod virtual_connection;
 
diff --git a/src/net/virtual_connection.rs b/src/net/virtual_connection.rs
index dd47501a..346ae7b8 100644
--- a/src/net/virtual_connection.rs
+++ b/src/net/virtual_connection.rs
@@ -7,7 +7,7 @@ use crate::{
     error::{ErrorKind, PacketErrorKind, Result},
     infrastructure::{
         arranging::{Arranging, ArrangingSystem, OrderingSystem, SequencingSystem},
-        AcknowledgmentHandler, CongestionHandler, Fragmentation, SentPacket,
+        AcknowledgmentHandler, Fragmentation, SentPacket,
     },
     net::constants::{
         ACKED_PACKET_HEADER, DEFAULT_ORDERING_STREAM, DEFAULT_SEQUENCING_STREAM,
@@ -35,7 +35,6 @@ pub struct VirtualConnection {
     ordering_system: OrderingSystem<(Box<[u8]>, PacketType)>,
     sequencing_system: SequencingSystem<Box<[u8]>>,
     acknowledge_handler: AcknowledgmentHandler,
-    congestion_handler: CongestionHandler,
 
     config: Config,
     fragmentation: Fragmentation,
@@ -53,7 +52,6 @@ impl VirtualConnection {
             ordering_system: OrderingSystem::new(),
             sequencing_system: SequencingSystem::new(),
             acknowledge_handler: AcknowledgmentHandler::new(),
-            congestion_handler: CongestionHandler::new(config),
             fragmentation: Fragmentation::new(config),
             config: config.to_owned(),
         }
@@ -113,8 +111,9 @@ impl VirtualConnection {
             DeliveryGuarantee::Unreliable => {
                 if packet.payload.len() <= self.config.receive_buffer_max_size {
                     if packet.packet_type == PacketType::Heartbeat {
-                        self.congestion_handler
-                            .process_outgoing(self.acknowledge_handler.local_sequence_num(), time);
+                        // TODO: implement congestion control.
+                        // self.congestion_handler
+                        //     .process_outgoing(self.acknowledge_handler.local_sequence_num(), time);
                     }
 
                     let mut builder = OutgoingPacketBuilder::new(packet.payload)
@@ -232,8 +231,10 @@ impl VirtualConnection {
                     }
                 };
 
-                self.congestion_handler
-                    .process_outgoing(self.acknowledge_handler.local_sequence_num(), time);
+                // TODO: implement congestion control.
+                // self.congestion_handler
+                //     .process_outgoing(self.acknowledge_handler.local_sequence_num(), time);
+
                 self.acknowledge_handler.process_outgoing(
                     packet.packet_type,
                     packet.payload,
@@ -316,8 +317,10 @@ impl VirtualConnection {
                             acked_header,
                         ) {
                             Ok(Some((payload, acked_header))) => {
-                                self.congestion_handler
-                                    .process_incoming(acked_header.sequence());
+                                // TODO: implement congestion control.
+                                // self.congestion_handler
+                                //     .process_incoming(acked_header.sequence());
+
                                 self.acknowledge_handler.process_incoming(
                                     acked_header.sequence(),
                                     acked_header.ack_seq(),
@@ -341,8 +344,10 @@ impl VirtualConnection {
                 } else {
                     let acked_header = packet_reader.read_acknowledge_header()?;
 
-                    self.congestion_handler
-                        .process_incoming(acked_header.sequence());
+                    // TODO: implement congestion control.
+                    // self.congestion_handler
+                    //     .process_incoming(acked_header.sequence());
+
                     self.acknowledge_handler.process_incoming(
                         acked_header.sequence(),
                         acked_header.ack_seq(),
diff --git a/src/sequence_buffer.rs b/src/sequence_buffer.rs
index 5ff441e7..d28f5079 100644
--- a/src/sequence_buffer.rs
+++ b/src/sequence_buffer.rs
@@ -2,10 +2,8 @@ use std::clone::Clone;
 
 use crate::packet::SequenceNumber;
 
-pub use self::congestion_data::CongestionData;
 pub use self::reassembly_data::ReassemblyData;
 
-mod congestion_data;
 mod reassembly_data;
 
 /// Collection to store data of any kind.