lib, ipcpd, irmd: Add full-fledged QoS

This adds more Quality of Service support to Ouroboros. One part is
the network specific characteristics such as bandwidth, delay, ...
The other part is end-to-end QoS like reliability, window based flow
control, ...

1 files changed, 76 insertions, 0 deletions

diff --git a/src/lib/qoscube.c b/src/lib/qoscube.c
new file mode 100644
index 00000000..4ab827a6
--- /dev/null
+++ b/src/lib/qoscube.c
@@ -0,0 +1,76 @@
+/*
+ * Ouroboros - Copyright (C) 2016 - 2017
+ *
+ * Quality of Service cube
+ *
+ *    Dimitri Staessens <dimitri.staessens@ugent.be>
+ *    Sander Vrijders   <sander.vrijders@ugent.be>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * version 2.1 as published by the Free Software Foundation.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+
+#include <ouroboros/qoscube.h>
+
+#include <string.h>
+
+static struct qos_spec qos_best_effort = {
+        .delay                = UINT32_MAX,
+        .bandwidth            = UINT64_MAX,
+        .availability         = 0,
+        .maximum_interruption = UINT32_MAX
+};
+
+static struct qos_spec qos_video = {
+        .delay                = 100,
+        .bandwidth            = UINT64_MAX,
+        .availability         = 3,
+        .maximum_interruption = 100
+};
+
+static struct qos_spec qos_voice = {
+        .delay                = 10,
+        .bandwidth            = 100000,
+        .availability         = 5,
+        .maximum_interruption = 50
+};
+
+qoscube_t qos_spec_to_cube(qosspec_t qs)
+{
+        if (qs.delay <= qos_voice.delay &&
+            qs.bandwidth <= qos_voice.bandwidth &&
+            qs.availability >= qos_voice.availability &&
+            qs.maximum_interruption <= qos_voice.maximum_interruption)
+                return QOS_CUBE_VOICE;
+        else if (qs.delay <= qos_video.delay &&
+                 qs.bandwidth <= qos_video.bandwidth &&
+                 qs.availability >= qos_video.availability &&
+                 qs.maximum_interruption <= qos_video.maximum_interruption)
+                return QOS_CUBE_VIDEO;
+        else
+                return QOS_CUBE_BE;
+}
+
+qosspec_t qos_cube_to_spec(qoscube_t qc)
+{
+        switch (qc) {
+        case QOS_CUBE_VOICE:
+                return qos_voice;
+        case QOS_CUBE_VIDEO:
+                return qos_video;
+        case QOS_CUBE_BE:
+        default:
+                return qos_best_effort;
+        }
+}