From 24d48c921bf28acc66b9395bdeaafebed718f6d2 Mon Sep 17 00:00:00 2001
From: root <liuchang@geedgenetworks.com>
Date: Thu, 8 Feb 2024 09:35:10 +0000
Subject: add codel temp code

---
 shaping/include/shaper.h     | 13 +------------
 shaping/include/shaper_aqm.h | 27 +++++++++++++++++++++++++++
 shaping/src/shaper_aqm.cpp   | 40 ++++++++++++++++++++++++++++++++++++++++
 3 files changed, 68 insertions(+), 12 deletions(-)

diff --git a/shaping/include/shaper.h b/shaping/include/shaper.h
index 83f93f1..0e7f455 100644
--- a/shaping/include/shaper.h
+++ b/shaping/include/shaper.h
@@ -7,6 +7,7 @@
 #include "utils.h"
 #include "shaper_stat.h"
 #include "shaper_global_stat.h"
+#include "shaper_aqm.h"
 extern "C" {
 #include "timeout.h"
 }
@@ -97,18 +98,6 @@ enum shaping_profile_type {
     PROFILE_TYPE_SPLIT_BY_LOCAL_HOST
 };
 
-enum shaper_aqm_type {
-    AQM_TYPE_NONE = 0,
-    AQM_TYPE_BLUE,
-    AQM_TYPE_CODEL,
-    AQM_TYPE_MAX
-};
-
-struct shaper_aqm_blue_para {
-    time_t update_time;
-    int probability;
-};
-
 struct shaper_token_multiple {
     int token_get_multiple;
     unsigned char has_drop_by_queue_full;
diff --git a/shaping/include/shaper_aqm.h b/shaping/include/shaper_aqm.h
index 794c74d..48fd970 100644
--- a/shaping/include/shaper_aqm.h
+++ b/shaping/include/shaper_aqm.h
@@ -1,2 +1,29 @@
+#pragma once
+#include <time.h>
+
+enum shaper_aqm_type {
+    AQM_TYPE_NONE = 0,
+    AQM_TYPE_BLUE,
+    AQM_TYPE_CODEL,
+    AQM_TYPE_MAX
+};
+
+struct shaper_aqm_blue_para {
+    time_t update_time;
+    int probability;
+};
+
+enum CoDel_state {
+    CODEL_STATE_NORMAL = 0,
+    CODEL_STATE_DROPPING_TIMER,
+    CODEL_STATE_DROPPING_PHASE,
+};
+
+struct shaper_aqm_codel_para {
+    unsigned long long start_drop_time_ms;
+    unsigned long long next_drop_time_ms;
+    enum CoDel_state state;
+    unsigned int drop_count;
+};
 
 int shaper_aqm_need_drop(struct shaping_profile_info *profile, struct shaping_packet_wrapper *pkt_wrapper);
\ No newline at end of file
diff --git a/shaping/src/shaper_aqm.cpp b/shaping/src/shaper_aqm.cpp
index 20c4190..857c8bd 100644
--- a/shaping/src/shaper_aqm.cpp
+++ b/shaping/src/shaper_aqm.cpp
@@ -1,3 +1,4 @@
+#include <math.h>
 #include <time.h>
 #include "shaper.h"
 #include "shaper_aqm.h"
@@ -27,6 +28,45 @@ static int shaper_aqm_blue_need_drop(struct shaping_packet_wrapper *pkt_wrapper,
     return 0;
 }
 
+
+#define CODEL_MAX_LATENCY 5 //unit:ms
+#define CODEL_DROP_INTERVAL 100 //unit:ms
+static int shaper_aqm_codel_need_drop(struct shaping_packet_wrapper *pkt_wrapper, struct shaper_aqm_codel_para *para, unsigned long long curr_time_ms, unsigned long long latency)
+{
+    if (latency < CODEL_MAX_LATENCY) {
+        para->state = CODEL_STATE_NORMAL;
+        return 0;
+    } 
+
+    int ret = 0;
+    switch (para->state) {
+        case CODEL_STATE_NORMAL:
+            para->start_drop_time_ms = curr_time_ms + CODEL_DROP_INTERVAL;
+            para->state = CODEL_STATE_DROPPING_TIMER;
+            break;
+        case CODEL_STATE_DROPPING_TIMER:
+            if (curr_time_ms >= para->next_drop_time_ms) {
+                para->state = CODEL_STATE_DROPPING_PHASE;
+                para->drop_count = 1;
+                para->next_drop_time_ms = curr_time_ms + CODEL_DROP_INTERVAL / sqrt(para->drop_count);
+                ret = 1;
+            }
+            break;
+        case CODEL_STATE_DROPPING_PHASE:
+            if (curr_time_ms >= para->next_drop_time_ms) {
+                para->drop_count++;
+                para->next_drop_time_ms = curr_time_ms + CODEL_DROP_INTERVAL / sqrt(para->drop_count);
+                ret = 1;
+            }
+            break;
+        default:
+            break;
+    }
+
+    return ret;
+}
+
+
 static int shaper_aqm_have_processed(struct shaping_packet_wrapper *pkt_wrapper, int profile_id)
 {
     int i = 0;
-- 
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