changes

6 files changed, 223 insertions, 63 deletions

diff --git a/src/ats/Makefile.am b/src/ats/Makefile.am
index 57ca63e08..bd6d6def2 100644
--- a/src/ats/Makefile.am
+++ b/src/ats/Makefile.am
@@ -44,6 +44,7 @@ libexec_PROGRAMS = \
 gnunet_service_ats_SOURCES = \
  gnunet-service-ats.c gnunet-service-ats.h\
  gnunet-service-ats_addresses.c gnunet-service-ats_addresses.h \
+ gnunet-service-ats_addresses_simplistic.c gnunet-service-ats_addresses_simplistic.h \
  $(GN_MLP_SRC) \
  gnunet-service-ats_performance.c gnunet-service-ats_performance.h \
  gnunet-service-ats_scheduling.c gnunet-service-ats_scheduling.h \
diff --git a/src/ats/ats.conf.in b/src/ats/ats.conf.in
index d99708174..d063af333 100644
--- a/src/ats/ats.conf.in
+++ b/src/ats/ats.conf.in
@@ -10,8 +10,9 @@ UNIXPATH = /tmp/gnunet-service-ats.sock
 UNIX_MATCH_UID = YES
 UNIX_MATCH_GID = YES
 
-# Enable MLP mode (default: NO)
-MLP = NO
+# Designated assigment mode: simplistic / MLP
+MODE = simplistic 
+
 # Network specific inbound/outbound quotas
 # LOOPBACK
 LOOPBACK_QUOTA_IN = unlimited
@@ -27,6 +28,8 @@ WLAN_QUOTA_IN = 1 MiB
 WLAN_QUOTA_OUT = 1 MiB
 # ATS options
 
+
+# MLP specific settings
 DUMP_MLP = NO
 DUMP_SOLUTION = NO
 DUMP_OVERWRITE = NO 
diff --git a/src/ats/gnunet-service-ats_addresses.c b/src/ats/gnunet-service-ats_addresses.c
index 584978e2a..1262c0ad4 100644
--- a/src/ats/gnunet-service-ats_addresses.c
+++ b/src/ats/gnunet-service-ats_addresses.c
@@ -34,29 +34,37 @@
 #if HAVE_LIBGLPK
 #include "gnunet-service-ats_addresses_mlp.h"
 #endif
+#include "gnunet-service-ats_addresses_simplistic.h"
 
 #define ATS_BLOCKING_DELTA GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_MILLISECONDS, 100)
 
+
+/**
+ * Available ressource assignment modes
+ */
 enum ATS_Mode
 {
   /*
+   * Simplistic mode:
+   *
    * Assign each peer an equal amount of bandwidth (bw)
    *
    * bw_per_peer = bw_total / #active addresses
    */
-  SIMPLE,
+  MODE_SIMPLISTIC,
 
   /*
-   * Use MLP solver to assign bandwidth
+   * MLP mode:
+   *
+   * Solve ressource assignment as an optimization problem
+   * Uses an mixed integer programming solver
    */
-  MLP
+  MODE_MLP
 };
 
 static struct GNUNET_CONTAINER_MultiHashMap *addresses;
 
-#if HAVE_LIBGLPK
-static struct GAS_MLP_Handle *mlp;
-#endif
+static void *solver;
 
 static unsigned long long wan_quota_in;
 
@@ -223,8 +231,8 @@ destroy_address (struct ATS_Address *addr)
                                                        addr));
 
 #if HAVE_LIBGLPK
-  if (ats_mode == MLP)
-    GAS_mlp_address_delete (mlp, addresses, addr);
+  if (ats_mode == MODE_MLP)
+    GAS_mlp_address_delete (solver, addresses, addr);
 #endif
 
   if (GNUNET_YES == addr->active)
@@ -556,8 +564,8 @@ GAS_addresses_update (const struct GNUNET_PeerIdentity *peer,
       break;
     }
 #if HAVE_LIBGLPK
-  if (ats_mode == MLP)
-    GAS_mlp_address_update (mlp, addresses, old);
+  if (ats_mode == MODE_MLP)
+    GAS_mlp_address_update (solver, addresses, old);
 #endif
 }
 
@@ -627,8 +635,8 @@ destroy_by_session_id (void *cls, const struct GNUNET_HashCode * key, void *valu
   {
     /* session was set to 0, update address */
 #if HAVE_LIBGLPK
-  if (ats_mode == MLP)
-    GAS_mlp_address_update (mlp, addresses, aa);
+  if (ats_mode == MODE_MLP)
+    GAS_mlp_address_update (solver, addresses, aa);
 #endif
   }
 
@@ -796,8 +804,8 @@ GAS_addresses_in_use (const struct GNUNET_PeerIdentity *peer,
   }
   old->used = in_use;
 #if HAVE_LIBGLPK
-  if (ats_mode == MLP)
-     GAS_mlp_address_update (mlp, addresses, old);
+  if (ats_mode == MODE_MLP)
+     GAS_mlp_address_update (solver, addresses, old);
 #endif
   return GNUNET_OK;
 }
@@ -810,7 +818,7 @@ request_address_mlp (const struct GNUNET_PeerIdentity *peer)
   aa = NULL;
 
 #if HAVE_GLPK
-  /* Get preferred address from MLP */
+  /* Get preferred address from MODE_MLP */
   struct ATS_PreferedAddress * paddr = NULL;
   paddr = GAS_mlp_get_preferred_address (mlp, addresses, peer);
   aa = paddr->address;
@@ -870,7 +878,7 @@ request_address_simple (const struct GNUNET_PeerIdentity *peer)
   {
     aa->active = GNUNET_YES;
     active_addr_count++;
-    if (ats_mode == SIMPLE)
+    if (ats_mode == MODE_SIMPLISTIC)
     {
       recalculate_assigned_bw ();
     }
@@ -893,11 +901,11 @@ GAS_addresses_request_address (const struct GNUNET_PeerIdentity *peer)
   if (GNUNET_NO == running)
     return;
 
-  if (ats_mode == SIMPLE)
+  if (ats_mode == MODE_SIMPLISTIC)
   {
     request_address_simple (peer);
   }
-  if (ats_mode == MLP)
+  if (ats_mode == MODE_MLP)
   {
     request_address_mlp(peer);
   }
@@ -939,8 +947,8 @@ GAS_addresses_change_preference (const struct GNUNET_PeerIdentity *peer,
   if (GNUNET_NO == running)
     return;
 #if HAVE_LIBGLPK
-  if (ats_mode == MLP)
-    GAS_mlp_address_change_preference (mlp, peer, kind, score);
+  if (ats_mode == MODE_MLP)
+    GAS_mlp_address_change_preference (solver, peer, kind, score);
 #endif
 }
 
@@ -956,16 +964,13 @@ void
 GAS_addresses_init (const struct GNUNET_CONFIGURATION_Handle *cfg,
                     const struct GNUNET_STATISTICS_Handle *stats)
 {
-  int mode;
-
+  int c;
   char *quota_wan_in_str;
   char *quota_wan_out_str;
-
+  char *mode_str;
   running = GNUNET_NO;
 
-  addresses = GNUNET_CONTAINER_multihashmap_create (128, GNUNET_NO);
-  GNUNET_assert (NULL != addresses);
-
+  /* Initialize the system with configuration values */
   if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string(cfg, "ats", "WAN_QUOTA_IN", &quota_wan_in_str))
   {
     if (0 == strcmp(quota_wan_in_str, "unlimited") ||
@@ -994,47 +999,72 @@ GAS_addresses_init (const struct GNUNET_CONFIGURATION_Handle *cfg,
     wan_quota_out = (UINT32_MAX) /10;
   }
 
-  mode = GNUNET_CONFIGURATION_get_value_yesno (cfg, "ats", "MLP");
-  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MLP mode %u", mode);
-  switch (mode)
+  /* Initialize the addresses database */
+  addresses = GNUNET_CONTAINER_multihashmap_create (128, GNUNET_NO);
+  GNUNET_assert (NULL != addresses);
+
+  /* Figure out configured solution method */
+  if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_string (cfg, "ats", "MODE", &mode_str))
   {
-    /* MLP = YES */
-    case GNUNET_YES:
-#if HAVE_LIBGLPK
-      ats_mode = MLP;
+      GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "No ressource assignment method configured, using simplistic approch\n");
+      ats_mode = MODE_SIMPLISTIC;
+  }
+  else
+  {
+      for (c = 0; c < strlen (mode_str); c++)
+        mode_str[c] = toupper (mode_str[c]);
+      if (0 == strcmp (mode_str, "SIMPLISTIC"))
+      {
+          ats_mode = MODE_SIMPLISTIC;
+      }
+      else if (0 == strcmp (mode_str, "MLP"))
+      {
+          ats_mode = MODE_MLP;
+#if !HAVE_LIBGLPK
+          GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Assignment method `%s' configured, but GLPK is not availabe, please install \n", mode_str);
+          ats_mode = MODE_SIMPLISTIC;
+#endif
+      }
+      else
+      {
+          GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Invalid ressource assignment method `%s' configured, using simplistic approch\n", mode_str);
+          ats_mode = MODE_SIMPLISTIC;
+      }
+  }
+
+  /* Start configured solution method */
+  switch (ats_mode)
+  {
+    case MODE_MLP:
       /* Init the MLP solver with default values */
-      mlp = GAS_mlp_init (cfg, stats, MLP_MAX_EXEC_DURATION, MLP_MAX_ITERATIONS);
-      if (NULL == mlp)
+      solver = GAS_mlp_init (cfg, stats, MLP_MAX_EXEC_DURATION, MLP_MAX_ITERATIONS);
+      if (NULL != solver)
       {
-        GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "MLP mode was configured, but libglpk is not installed, switching to simple mode\n");
-        GNUNET_STATISTICS_update (GSA_stats, "MLP mode enabled", 0, GNUNET_NO);
-        break;
+          ats_mode = MODE_MLP;
+          GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "ATS started in %s mode\n", "MLP");
+          break;
+      }
+      GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Failed to initialize MLP solver!\n");
+    case MODE_SIMPLISTIC:
+      /* Init the simplistic solver with default values */
+      GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "ATS started in %s mode\n", "SIMPLISTIC");
+      solver = GAS_simplistic_init (cfg, stats);
+      if (NULL != solver)
+      {
+          ats_mode = MODE_SIMPLISTIC;
+          GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "ATS started in %s mode\n", "SIMPLISTIC");
+          break;
       }
       else
       {
-        GNUNET_STATISTICS_update (GSA_stats, "MLP enabled", 1, GNUNET_NO);
-        break;
+        GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Failed to initialize simplistic solver!\n");
+        return;
       }
-#else
-      GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "MLP mode was configured, but libglpk is not installed, switching to simple mode");
-      GNUNET_STATISTICS_update (GSA_stats, "MLP enabled", 0, GNUNET_NO);
-      ats_mode = SIMPLE;
-      break;
-#endif
-    /* MLP = NO */
-    case GNUNET_NO:
-      GNUNET_STATISTICS_update (GSA_stats, "MLP enabled", 0, GNUNET_NO);
-      ats_mode = SIMPLE;
-      break;
-    /* No configuration value */
-    case GNUNET_SYSERR:
-      GNUNET_STATISTICS_update (GSA_stats, "MLP enabled", 0, GNUNET_NO);
-      ats_mode = SIMPLE;
       break;
     default:
       break;
   }
-  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "ATS started with %s mode\n", (SIMPLE == ats_mode) ? "SIMPLE" : "MLP");
+  /* up and running */
   running = GNUNET_YES;
 }
 
@@ -1079,12 +1109,21 @@ GAS_addresses_done ()
   running = GNUNET_NO;
   GNUNET_CONTAINER_multihashmap_destroy (addresses);
   addresses = NULL;
-#if HAVE_LIBGLPK
-  if (ats_mode == MLP)
+
+  /* Stop configured solution method */
+  switch (ats_mode)
   {
-    GAS_mlp_done (mlp);
+    case MODE_MLP:
+      /* Init the MLP solver with default values */
+      GAS_mlp_done (solver);
+      break;
+    case MODE_SIMPLISTIC:
+      /* Init the simplistic solver with default values */
+      GAS_simplistic_done (solver);
+      break;
+    default:
+      break;
   }
-#endif
 }
 
 struct PeerIteratorContext
diff --git a/src/ats/gnunet-service-ats_addresses_simplistic.c b/src/ats/gnunet-service-ats_addresses_simplistic.c
new file mode 100644
index 000000000..ac9828f11
--- /dev/null
+++ b/src/ats/gnunet-service-ats_addresses_simplistic.c
@@ -0,0 +1,64 @@
+/*
+     This file is part of GNUnet.
+     (C) 2011 Christian Grothoff (and other contributing authors)
+
+     GNUnet is free software; you can redistribute it and/or modify
+     it under the terms of the GNU General Public License as published
+     by the Free Software Foundation; either version 3, or (at your
+     option) any later version.
+
+     GNUnet is distributed in the hope that it will be useful, but
+     WITHOUT ANY WARRANTY; without even the implied warranty of
+     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+     General Public License for more details.
+
+     You should have received a copy of the GNU General Public License
+     along with GNUnet; see the file COPYING.  If not, write to the
+     Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+     Boston, MA 02111-1307, USA.
+*/
+
+/**
+ * @file ats/gnunet-service-ats_addresses_simplistic.c
+ * @brief ats mlp problem solver
+ * @author Matthias Wachs
+ * @author Christian Grothoff
+ */
+#include "platform.h"
+#include "gnunet_util_lib.h"
+#include "gnunet-service-ats_addresses.h"
+#include "gnunet_statistics_service.h"
+#include "glpk.h"
+
+struct GAS_SIMPLISTIC_Handle
+{
+
+};
+
+/**
+ * Init the simplistic problem solving component
+ *
+ * @param cfg configuration handle
+ * @param stats the GNUNET_STATISTICS handle
+ * @param max_duration maximum numbers of iterations for the LP/MLP Solver
+ * @param max_iterations maximum time limit for the LP/MLP Solver
+ * @return struct GAS_MLP_Handle * on success, NULL on fail
+ */
+struct GAS_SIMPLISTIC_Handle *
+GAS_simplistic_init (const struct GNUNET_CONFIGURATION_Handle *cfg,
+                     const struct GNUNET_STATISTICS_Handle *stats)
+{
+  struct GAS_SIMPLISTIC_Handle *solver = GNUNET_malloc (sizeof (struct GAS_SIMPLISTIC_Handle));
+  return solver;
+}
+
+/**
+ * Shutdown the simplistic problem solving component
+ */
+void
+GAS_simplistic_done (struct GAS_SIMPLISTIC_Handle *solver)
+{
+  GNUNET_free (solver);
+}
+
+/* end of gnunet-service-ats_addresses_simplistic.c */
diff --git a/src/ats/gnunet-service-ats_addresses_simplistic.h b/src/ats/gnunet-service-ats_addresses_simplistic.h
new file mode 100644
index 000000000..654753a7f
--- /dev/null
+++ b/src/ats/gnunet-service-ats_addresses_simplistic.h
@@ -0,0 +1,53 @@
+/*
+     This file is part of GNUnet.
+     (C) 2011 Christian Grothoff (and other contributing authors)
+
+     GNUnet is free software; you can redistribute it and/or modify
+     it under the terms of the GNU General Public License as published
+     by the Free Software Foundation; either version 3, or (at your
+     option) any later version.
+
+     GNUnet is distributed in the hope that it will be useful, but
+     WITHOUT ANY WARRANTY; without even the implied warranty of
+     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+     General Public License for more details.
+
+     You should have received a copy of the GNU General Public License
+     along with GNUnet; see the file COPYING.  If not, write to the
+     Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+     Boston, MA 02111-1307, USA.
+*/
+
+/**
+ * @file ats/gnunet-service-ats_addresses_simplistic.h
+ * @brief ats mlp problem solver
+ * @author Matthias Wachs
+ * @author Christian Grothoff
+ */
+#include "platform.h"
+#include "gnunet_statistics_service.h"
+#include "gnunet-service-ats_addresses.h"
+
+struct GAS_SIMPLISTIC_Handle;
+
+/**
+ * Init the simplistic problem solving component
+ *
+ * @param cfg configuration handle
+ * @param stats the GNUNET_STATISTICS handle
+ * @param max_duration maximum numbers of iterations for the LP/MLP Solver
+ * @param max_iterations maximum time limit for the LP/MLP Solver
+ * @return struct GAS_MLP_Handle * on success, NULL on fail
+ */
+struct GAS_SIMPLISTIC_Handle *
+GAS_simplistic_init (const struct GNUNET_CONFIGURATION_Handle *cfg,
+                     const struct GNUNET_STATISTICS_Handle *stats);
+
+/**
+ * Shutdown the simplistic problem solving component
+ */
+void
+GAS_simplistic_done (struct GAS_SIMPLISTIC_Handle *);
+
+
+/* end of gnunet-service-ats_addresses_simplistic.h */
diff --git a/src/ats/test_ats_api.conf b/src/ats/test_ats_api.conf
index 2ac499c66..d55d9911c 100644
--- a/src/ats/test_ats_api.conf
+++ b/src/ats/test_ats_api.conf
@@ -20,7 +20,7 @@ UNIX_MATCH_UID = YES
 UNIX_MATCH_GID = YES
 
 # Enable MLP mode (default: NO)
-MLP = NO
+MODE = SIMPLISTIC
 # Network specific inbound/outbound quotas
 # LOOPBACK
 LOOPBACK_QUOTA_IN = unlimited