babeld: Presenting interface configuration parameters

* Presenting the configuration parameters enable-timestamps,
max-rtt-penalty, rtt-min, and rtt-max.
* Using #defines for the default configuration values instead of magic
numbers.
* rtt-max and rtt-min are entered and presented in milliseconds, but
stored and internally used in microseconds.

Signed-off-by: Adriano Marto Reis <adrianomarto@gmail.com>

2 files changed, 39 insertions, 7 deletions

diff --git a/babeld/babel_interface.c b/babeld/babel_interface.c
index 615ed9fee..1dae93b0e 100644
--- a/babeld/babel_interface.c
+++ b/babeld/babel_interface.c
@@ -484,7 +484,9 @@ DEFUN (babel_set_rtt_min,
     babel_ifp = babel_get_if_nfo(ifp);
     assert (babel_ifp != NULL);
 
-    babel_ifp->rtt_min = rtt;
+    babel_ifp->rtt_min =
+	    rtt
+	    * 1000; // value entered in milliseconds and stored as microseconds
     return CMD_SUCCESS;
 }
 
@@ -504,7 +506,9 @@ DEFUN (babel_set_rtt_max,
     babel_ifp = babel_get_if_nfo(ifp);
     assert (babel_ifp != NULL);
 
-    babel_ifp->rtt_max = rtt;
+    babel_ifp->rtt_max =
+	    rtt
+	    * 1000; // value entered in milliseconds and stored as microseconds
     return CMD_SUCCESS;
 }
 
@@ -1328,8 +1332,29 @@ interface_config_write (struct vty *vty)
                        babel_ifp->update_interval);
             write++;
         }
-        /* Some parameters have different defaults for wired/wireless. */
-        if (CHECK_FLAG (babel_ifp->flags, BABEL_IF_WIRED)) {
+	if (CHECK_FLAG(babel_ifp->flags, BABEL_IF_TIMESTAMPS)) {
+		vty_out(vty, " babel enable-timestamps\n");
+		write++;
+	}
+	if (babel_ifp->max_rtt_penalty != BABEL_DEFAULT_MAX_RTT_PENALTY) {
+		vty_out(vty, " babel max-rtt-penalty %u\n",
+			babel_ifp->max_rtt_penalty);
+		write++;
+	}
+	if (babel_ifp->rtt_decay != BABEL_DEFAULT_RTT_DECAY) {
+		vty_out(vty, " babel rtt-decay %u\n", babel_ifp->rtt_decay);
+		write++;
+	}
+	if (babel_ifp->rtt_min != BABEL_DEFAULT_RTT_MIN) {
+		vty_out(vty, " babel rtt-min %u\n", babel_ifp->rtt_min / 1000);
+		write++;
+	}
+	if (babel_ifp->rtt_max != BABEL_DEFAULT_RTT_MAX) {
+		vty_out(vty, " babel rtt-max %u\n", babel_ifp->rtt_max / 1000);
+		write++;
+	}
+	/* Some parameters have different defaults for wired/wireless. */
+	if (CHECK_FLAG (babel_ifp->flags, BABEL_IF_WIRED)) {
             if (!CHECK_FLAG (babel_ifp->flags, BABEL_IF_SPLIT_HORIZON)) {
                 vty_out (vty, " no babel split-horizon\n");
                 write++;
@@ -1395,9 +1420,10 @@ babel_interface_allocate (void)
     babel_ifp->bucket_time = babel_now.tv_sec;
     babel_ifp->bucket = BUCKET_TOKENS_MAX;
     babel_ifp->hello_seqno = (frr_weak_random() & 0xFFFF);
-    babel_ifp->rtt_min = 10000;
-    babel_ifp->rtt_max = 120000;
-    babel_ifp->max_rtt_penalty = 150;
+    babel_ifp->rtt_decay = BABEL_DEFAULT_RTT_DECAY;
+    babel_ifp->rtt_min = BABEL_DEFAULT_RTT_MIN;
+    babel_ifp->rtt_max = BABEL_DEFAULT_RTT_MAX;
+    babel_ifp->max_rtt_penalty = BABEL_DEFAULT_MAX_RTT_PENALTY;
     babel_ifp->hello_interval = BABEL_DEFAULT_HELLO_INTERVAL;
     babel_ifp->update_interval = BABEL_DEFAULT_UPDATE_INTERVAL;
     babel_ifp->channel = BABEL_IF_CHANNEL_INTERFERING;
diff --git a/babeld/babeld.h b/babeld/babeld.h
index 4487aae99..38859f54d 100644
--- a/babeld/babeld.h
+++ b/babeld/babeld.h
@@ -81,6 +81,11 @@ THE SOFTWARE.
 #define BABEL_DEFAULT_HELLO_INTERVAL 4000
 #define BABEL_DEFAULT_UPDATE_INTERVAL 16000
 #define BABEL_DEFAULT_RESEND_DELAY 2000
+#define BABEL_DEFAULT_RTT_DECAY 42
+
+/* Values in microseconds */
+#define BABEL_DEFAULT_RTT_MIN 10000
+#define BABEL_DEFAULT_RTT_MAX 120000
 
 /* In units of seconds */
 #define BABEL_DEFAULT_SMOOTHING_HALF_LIFE 4
@@ -90,6 +95,7 @@ THE SOFTWARE.
 
 #define BABEL_DEFAULT_RXCOST_WIRED 96
 #define BABEL_DEFAULT_RXCOST_WIRELESS 256
+#define BABEL_DEFAULT_MAX_RTT_PENALTY 150
 
 /* Babel structure. */
 struct babel