From e8b709a3c4537c7e71c71575e4835fa761c08d46 Mon Sep 17 00:00:00 2001
From: Mauro Sardara <msardara@cisco.com>
Date: Tue, 20 Oct 2020 10:41:47 +0200
Subject: [HICN-648] Optionally reset RAAQM window in a per-session basis

Signed-off-by: Mauro Sardara <msardara@cisco.com>
Change-Id: I6b431db78de2427251d6050dfaff38a741efd9bd
---
 .../includes/hicn/transport/interfaces/socket_options_keys.h  |  1 +
 libtransport/src/implementation/socket_consumer.h             | 11 +++++++++++
 libtransport/src/protocols/raaqm.cc                           |  8 ++++++++
 3 files changed, 20 insertions(+)

diff --git a/libtransport/includes/hicn/transport/interfaces/socket_options_keys.h b/libtransport/includes/hicn/transport/interfaces/socket_options_keys.h
index 0b7a79c3d..f50e919b4 100644
--- a/libtransport/includes/hicn/transport/interfaces/socket_options_keys.h
+++ b/libtransport/includes/hicn/transport/interfaces/socket_options_keys.h
@@ -66,6 +66,7 @@ typedef enum {
   MINIMUM_DROP_PROBABILITY = 205,
   PATH_ID = 206,
   RTT_STATS = 207,
+  PER_SESSION_CWINDOW_RESET = 208
 } RaaqmTransportOptions;
 
 typedef enum {
diff --git a/libtransport/src/implementation/socket_consumer.h b/libtransport/src/implementation/socket_consumer.h
index 5e5073956..87965923e 100644
--- a/libtransport/src/implementation/socket_consumer.h
+++ b/libtransport/src/implementation/socket_consumer.h
@@ -58,6 +58,7 @@ class ConsumerSocket : public Socket<BasePortal> {
         verifier_(std::make_shared<utils::Verifier>()),
         verify_signature_(false),
         key_content_(false),
+        reset_window_(false),
         on_interest_output_(VOID_HANDLER),
         on_interest_timeout_(VOID_HANDLER),
         on_interest_satisfied_(VOID_HANDLER),
@@ -343,6 +344,11 @@ class ConsumerSocket : public Socket<BasePortal> {
           result = SOCKET_OPTION_SET;
           break;
 
+        case RaaqmTransportOptions::PER_SESSION_CWINDOW_RESET:
+          reset_window_ = socket_option_value;
+          result = SOCKET_OPTION_SET;
+          break;
+
         default:
           return result;
       }
@@ -648,6 +654,10 @@ class ConsumerSocket : public Socket<BasePortal> {
         socket_option_value = is_async_;
         break;
 
+      case RaaqmTransportOptions::PER_SESSION_CWINDOW_RESET:
+        socket_option_value = reset_window_;
+        break;
+
       default:
         return SOCKET_OPTION_NOT_GET;
     }
@@ -923,6 +933,7 @@ class ConsumerSocket : public Socket<BasePortal> {
   PARCKeyId *key_id_;
   std::atomic_bool verify_signature_;
   bool key_content_;
+  bool reset_window_;
 
   ConsumerInterestCallback on_interest_retransmission_;
   ConsumerInterestCallback on_interest_output_;
diff --git a/libtransport/src/protocols/raaqm.cc b/libtransport/src/protocols/raaqm.cc
index 783d6194b..5023adf2e 100644
--- a/libtransport/src/protocols/raaqm.cc
+++ b/libtransport/src/protocols/raaqm.cc
@@ -116,6 +116,14 @@ void RaaqmTransportProtocol::reset() {
   // Reset protocol variables
   interests_in_flight_ = 0;
   t0_ = utils::SteadyClock::now();
+
+  // Optionally reset congestion window
+  bool reset_window;
+  socket_->getSocketOption(RaaqmTransportOptions::PER_SESSION_CWINDOW_RESET,
+                           reset_window);
+  if (reset_window) {
+    current_window_size_ = 1;
+  }
 }
 
 bool RaaqmTransportProtocol::verifyKeyPackets() {
-- 
cgit 1.2.3-korg