From 4253dace949ef4d4480b26d091046ff08fa1b6bc Mon Sep 17 00:00:00 2001
From: Bart Polot <bart@net.in.tum.de>
Date: Mon, 15 Dec 2014 07:17:55 +0000
Subject: [PATCH] Fix connection count to count only ESTABLISHED connections,
 use DEFINE instead of hardcoded number

---
 src/cadet/gnunet-service-cadet_connection.c |  4 +++-
 src/cadet/gnunet-service-cadet_peer.c       | 15 +++++++-------
 src/cadet/gnunet-service-cadet_tunnel.c     | 23 ++++++++++++---------
 src/cadet/gnunet-service-cadet_tunnel.h     |  2 ++
 4 files changed, 25 insertions(+), 19 deletions(-)

diff --git a/src/cadet/gnunet-service-cadet_connection.c b/src/cadet/gnunet-service-cadet_connection.c
index ee96dddf8..fe4a22747 100644
--- a/src/cadet/gnunet-service-cadet_connection.c
+++ b/src/cadet/gnunet-service-cadet_connection.c
@@ -1833,6 +1833,7 @@ GCC_handle_broken (void* cls,
   }
 
   t = c->t;
+
   fwd = is_fwd (c, id);
   c->destroy = GNUNET_YES;
   if (GCC_is_terminal (c, fwd))
@@ -2699,7 +2700,8 @@ GCC_get_allowed (struct CadetConnection *c, int fwd)
   struct CadetFlowControl *fc;
 
   fc = fwd ? &c->fwd_fc : &c->bck_fc;
-  if (GC_is_pid_bigger (fc->last_pid_recv, fc->last_ack_sent))
+  if (CADET_CONNECTION_READY != c->state
+      || GC_is_pid_bigger (fc->last_pid_recv, fc->last_ack_sent))
   {
     return 0;
   }
diff --git a/src/cadet/gnunet-service-cadet_peer.c b/src/cadet/gnunet-service-cadet_peer.c
index b57c77e11..838a2d3de 100644
--- a/src/cadet/gnunet-service-cadet_peer.c
+++ b/src/cadet/gnunet-service-cadet_peer.c
@@ -941,8 +941,8 @@ search_handler (void *cls, const struct CadetPeerPath *path)
   /* Count connections */
   connection_count = GCT_count_connections (peer->tunnel);
 
-  /* If we already have 3 (or more (?!)) connections, it's enough */
-  if (3 <= connection_count)
+  /* If we already have our minimum (or more) connections, it's enough */
+  if (CONNECTIONS_PER_TUNNEL <= connection_count)
     return;
 
   if (CADET_TUNNEL_SEARCHING == GCT_get_cstate (peer->tunnel))
@@ -1914,11 +1914,7 @@ GCP_add_path (struct CadetPeer *peer, struct CadetPeerPath *path,
       LOG (GNUNET_ERROR_TYPE_DEBUG, "  added\n");
       GNUNET_CONTAINER_DLL_insert_before (peer->path_head,
                                           peer->path_tail, aux, path);
-      if (NULL != peer->tunnel && 3 < GCT_count_connections (peer->tunnel))
-      {
-        GCP_connect (peer);
-      }
-      return path;
+      goto finish;
     }
     else
     {
@@ -1933,7 +1929,10 @@ GCP_add_path (struct CadetPeer *peer, struct CadetPeerPath *path,
   GNUNET_CONTAINER_DLL_insert_tail (peer->path_head, peer->path_tail,
                                     path);
   LOG (GNUNET_ERROR_TYPE_DEBUG, "  added last\n");
-  if (NULL != peer->tunnel && 3 < GCT_count_connections (peer->tunnel))
+
+finish:
+  if (NULL != peer->tunnel
+      && CONNECTIONS_PER_TUNNEL < GCT_count_connections (peer->tunnel))
   {
     GCP_connect (peer);
   }
diff --git a/src/cadet/gnunet-service-cadet_tunnel.c b/src/cadet/gnunet-service-cadet_tunnel.c
index 44b9f3153..cab5809a3 100644
--- a/src/cadet/gnunet-service-cadet_tunnel.c
+++ b/src/cadet/gnunet-service-cadet_tunnel.c
@@ -37,8 +37,6 @@
 
 #define REKEY_WAIT GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_SECONDS, 5)
 
-#define CONNECTIONS_PER_TUNNEL 3
-
 #if !defined(GNUNET_CULL_LOGGING)
 #define DUMP_KEYS_TO_STDERR GNUNET_YES
 #else
@@ -2332,7 +2330,7 @@ trim_connections (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
 
     for (c = iter = t->connection_head; NULL != iter; iter = iter->next)
     {
-      if ((NULL == c || iter->created.abs_value_us > c->created.abs_value_us)
+      if ((iter->created.abs_value_us > c->created.abs_value_us)
           && GNUNET_NO == GCC_is_direct (iter->c))
       {
         c = iter;
@@ -2788,7 +2786,7 @@ GCT_count_connections (struct CadetTunnel *t)
     return 0;
 
   for (count = 0, iter = t->connection_head; NULL != iter; iter = iter->next)
-    if (CADET_CONNECTION_DESTROYED != GCC_get_state (iter->c))
+    if (CADET_CONNECTION_READY == GCC_get_state (iter->c))
       count++;
 
   return count;
@@ -3065,24 +3063,29 @@ GCT_send_connection_acks (struct CadetTunnel *t)
   }
 
   /* Authorize connections to send more data */
-  to_allow = buffer; /* - allowed; */
+  to_allow = buffer; /* FIXME (- allowed;) */
 
   for (iter = t->connection_head;
        NULL != iter && to_allow > 0;
        iter = iter->next)
   {
-    allow_per_connection = to_allow/cs;
-    to_allow -= allow_per_connection;
-    cs--;
-    if (get_connection_allowed (iter) > 64 / 3)
+    if (CADET_CONNECTION_READY != GCC_get_state (iter->c)
+        || get_connection_allowed (iter) > 64 / 3)
     {
       continue;
     }
+    allow_per_connection = to_allow/cs;
+    to_allow -= allow_per_connection;
+    cs--;
     GCC_allow (iter->c, allow_per_connection,
                GCC_is_origin (iter->c, GNUNET_NO));
   }
 
-  GNUNET_break (to_allow == 0); //FIXME tripped
+  if (0 != to_allow)
+  {
+    GNUNET_break (0);
+    LOG (GNUNET_ERROR_TYPE_WARNING, "  reminding to_allow: %u\n", to_allow);
+  }
 }
 
 
diff --git a/src/cadet/gnunet-service-cadet_tunnel.h b/src/cadet/gnunet-service-cadet_tunnel.h
index 3c57896d5..12be8a032 100644
--- a/src/cadet/gnunet-service-cadet_tunnel.h
+++ b/src/cadet/gnunet-service-cadet_tunnel.h
@@ -40,6 +40,8 @@ extern "C"
 #include "platform.h"
 #include "gnunet_util_lib.h"
 
+#define CONNECTIONS_PER_TUNNEL 3
+
 /**
  * All the connectivity states a tunnel can be in.
  */
-- 
2.25.1