From ff133577d0326c8283fcc0d8f3159cbfc8fcf23f Mon Sep 17 00:00:00 2001
From: Philip Levis <pal@cs.stanford.edu>
Date: Tue, 27 Feb 2018 16:51:06 -0800
Subject: [PATCH] Fix bug in which ENOACK was not correctly being returned.

---
 userland/libtock/ieee802154.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/userland/libtock/ieee802154.c b/userland/libtock/ieee802154.c
index c1844526c0..042a083109 100644
--- a/userland/libtock/ieee802154.c
+++ b/userland/libtock/ieee802154.c
@@ -327,7 +327,14 @@ int ieee802154_send(unsigned short addr,
   err = command(RADIO_DRIVER, COMMAND_SEND, (unsigned int) addr, 0);
   if (err < 0) return err;
   yield_for(&tx_done);
-  return tx_result;
+  if (tx_result != TOCK_SUCCESS) {
+    return tx_result;
+  } else if (tx_acked == 0) {
+    return TOCK_ENOACK;
+  } else {
+    return TOCK_SUCCESS;
+  }
+
 }
 
 // Internal callback for receive