From 4eeda95ac7f534af2006cd6e4c85a64bb8703665 Mon Sep 17 00:00:00 2001
From: Jon Shallow <supjps-libcoap@jpshallow.com>
Date: Wed, 25 Jul 2018 11:47:00 +0100
Subject: [PATCH] src/debug.c: Allow loss level of 0% to restore full flow

If a loss level is configured using coap_debug_set_packet_loss(), it
is not possible to restore full flow using 0% - as 0 is rejected as
being invalid.  This fix allows 0% to restore full traffic flows again.
---
 src/debug.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/debug.c b/src/debug.c
index fb76a0eb..1706e838 100644
--- a/src/debug.c
+++ b/src/debug.c
@@ -697,13 +697,16 @@ int coap_debug_set_packet_loss(const char *loss_level) {
   const char *p = loss_level;
   char *end = NULL;
   int n = (int)strtol(p, &end, 10), i = 0;
-  if (end == p || n <= 0)
+  if (end == p || n < 0)
     return 0;
   if (*end == '%') {
     if (n > 100)
       n = 100;
     packet_loss_level = n * 65536 / 100;
+    coap_log(LOG_DEBUG, "packet loss level set to %d%%\n", n);
   } else {
+    if (n <= 0)
+      return 0;
     while (i < 10) {
       packet_loss_intervals[i].start = n;
       if (*end == '-') {