lib: Add a data qos cube

This adds a data qos cube that is reliable. Reliable qos can be
selected by setting the loss parameter of the qosspec to 0.

Signed-off-by: Dimitri Staessens <dimitri.staessens@ugent.be>
Signed-off-by: Sander Vrijders <sander.vrijders@ugent.be>

4 files changed, 34 insertions, 12 deletions

diff --git a/src/lib/dev.c b/src/lib/dev.c
index ee82bbaa..8417d63b 100644
--- a/src/lib/dev.c
+++ b/src/lib/dev.c
@@ -536,7 +536,7 @@ int flow_accept(qosspec_t *             qs,
         assert(ai.flows[fd].frcti == NULL);
 
         if (qc != QOS_CUBE_RAW) {
-                ai.flows[fd].frcti = frcti_create(fd);
+                ai.flows[fd].frcti = frcti_create(fd, qc);
                 if (ai.flows[fd].frcti == NULL) {
                         flow_fini(fd);
                         pthread_rwlock_unlock(&ai.lock);
@@ -611,7 +611,7 @@ int flow_alloc(const char *            dst,
         assert(ai.flows[fd].frcti == NULL);
 
         if (qc != QOS_CUBE_RAW) {
-                ai.flows[fd].frcti = frcti_create(fd);
+                ai.flows[fd].frcti = frcti_create(fd, qc);
                 if (ai.flows[fd].frcti == NULL) {
                         flow_fini(fd);
                         pthread_rwlock_unlock(&ai.lock);
diff --git a/src/lib/frct.c b/src/lib/frct.c
index bcb031c3..00261272 100644
--- a/src/lib/frct.c
+++ b/src/lib/frct.c
@@ -105,7 +105,8 @@ static void frct_fini(void)
         timerwheel_destroy(frct.tw);
 }
 
-static struct frcti * frcti_create(int fd)
+static struct frcti * frcti_create(int       fd,
+                                   qoscube_t qc)
 {
         struct frcti *  frcti;
         time_t          delta_t;
@@ -133,6 +134,9 @@ static struct frcti * frcti_create(int fd)
 
         delta_t = (frcti->mpl + frcti->a + frcti->r) / 1000;
 
+        if (qc == QOS_CUBE_DATA)
+                frcti->snd_cr.cflags |= FRCTFRTX;
+
         frcti->snd_cr.conf   = true;
         frcti->snd_cr.inact  = 3 * delta_t + 1;
         frcti->snd_cr.act    = now.tv_sec - (frcti->snd_cr.inact + 1);
@@ -317,6 +321,9 @@ static int __frcti_snd(struct frcti *       frcti,
         pci->seqno = hton32(snd_cr->seqno++);
         if (!(snd_cr->cflags & FRCTFRTX))
                 snd_cr->lwe++;
+        else
+                /* TODO: update on ACK */
+                snd_cr->lwe++;
 
         snd_cr->act  = now.tv_sec;
         snd_cr->conf = false;
diff --git a/src/lib/qos.c b/src/lib/qos.c
index f5fbf1fb..bee6ed71 100644
--- a/src/lib/qos.c
+++ b/src/lib/qos.c
@@ -25,19 +25,22 @@
 
 #include <stdint.h>
 #include <stddef.h>
+#include <string.h>
 
 qosspec_t qos_raw = {
         .delay                = UINT32_MAX,
-        .bandwidth            = UINT64_MAX,
+        .bandwidth            = 0,
         .availability         = 0,
+        .loss                 = 1,
         .in_order             = 0,
         .maximum_interruption = UINT32_MAX
 };
 
 qosspec_t qos_best_effort = {
         .delay                = UINT32_MAX,
-        .bandwidth            = UINT64_MAX,
+        .bandwidth            = 0,
         .availability         = 0,
+        .loss                 = 1,
         .in_order             = 1,
         .maximum_interruption = UINT32_MAX
 };
@@ -46,27 +49,35 @@ qosspec_t qos_video = {
         .delay                = 100,
         .bandwidth            = UINT64_MAX,
         .availability         = 3,
+        .loss                 = 1,
         .in_order             = 1,
         .maximum_interruption = 100
 };
 
 qosspec_t qos_voice = {
-        .delay                = 10,
+        .delay                = 50,
         .bandwidth            = 100000,
         .availability         = 5,
+        .loss                 = 1,
         .in_order             = 1,
         .maximum_interruption = 50
 };
 
+qosspec_t qos_data = {
+        .delay                = 1000,
+        .bandwidth            = 0,
+        .availability         = 0,
+        .in_order             = 1,
+        .loss                 = 0,
+        .maximum_interruption = 2000
+};
+
 int qosspec_init(qosspec_t * qs)
 {
         if (qs == NULL)
                 return -EINVAL;
 
-        qs->delay = UINT32_MAX;
-        qs->bandwidth = UINT64_MAX;
-        qs->availability = 0;
-        qs->maximum_interruption = UINT32_MAX;
+        *qs = qos_best_effort;
 
         return 0;
 }
@@ -76,7 +87,7 @@ int qosspec_fini(qosspec_t * qs)
         if (qs == NULL)
                 return -EINVAL;
 
-        qs = NULL;
+        memset(qs, 0, sizeof(*qs));
 
         return 0;
 }
diff --git a/src/lib/qoscube.c b/src/lib/qoscube.c
index 12f7c277..5dfa35ad 100644
--- a/src/lib/qoscube.c
+++ b/src/lib/qoscube.c
@@ -27,7 +27,9 @@
 
 qoscube_t qos_spec_to_cube(qosspec_t qs)
 {
-        if (qs.delay <= qos_voice.delay &&
+        if (qs.loss == 0)
+                return QOS_CUBE_DATA;
+        else if (qs.delay <= qos_voice.delay &&
             qs.bandwidth <= qos_voice.bandwidth &&
             qs.availability >= qos_voice.availability &&
             qs.maximum_interruption <= qos_voice.maximum_interruption)
@@ -52,6 +54,8 @@ qosspec_t qos_cube_to_spec(qoscube_t qc)
                 return qos_video;
         case QOS_CUBE_BE:
                 return qos_best_effort;
+        case QOS_CUBE_DATA:
+                return qos_data;
         default:
                 return qos_raw;
         }