From 31e0fec12aeb07de3ac92a90afcf6ace6e027707 Mon Sep 17 00:00:00 2001
From: Yakun Xu <bukepo@gmail.com>
Date: Thu, 19 Apr 2018 01:54:13 +0800
Subject: [PATCH] [link] fix link raw caps calculation (#2668)

Allow software implementations of link layer features even when hardware
supports.
---
 src/core/api/link_raw_api.cpp | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/src/core/api/link_raw_api.cpp b/src/core/api/link_raw_api.cpp
index 85f593148..e7bf8fc86 100644
--- a/src/core/api/link_raw_api.cpp
+++ b/src/core/api/link_raw_api.cpp
@@ -157,18 +157,24 @@ otRadioCaps LinkRaw::GetCaps(void) const
     // time included into the raw link-layer code.
 
 #if OPENTHREAD_CONFIG_ENABLE_SOFTWARE_ACK_TIMEOUT
-    assert((RadioCaps & OT_RADIO_CAPS_ACK_TIMEOUT) == 0);
-    RadioCaps = static_cast<otRadioCaps>(RadioCaps | OT_RADIO_CAPS_ACK_TIMEOUT);
+    if ((RadioCaps & OT_RADIO_CAPS_ACK_TIMEOUT) == 0)
+    {
+        RadioCaps = static_cast<otRadioCaps>(RadioCaps | OT_RADIO_CAPS_ACK_TIMEOUT);
+    }
 #endif // OPENTHREAD_CONFIG_ENABLE_SOFTWARE_ACK_TIMEOUT
 
 #if OPENTHREAD_CONFIG_ENABLE_SOFTWARE_RETRANSMIT
-    assert((RadioCaps & OT_RADIO_CAPS_TRANSMIT_RETRIES) == 0);
-    RadioCaps = static_cast<otRadioCaps>(RadioCaps | OT_RADIO_CAPS_TRANSMIT_RETRIES);
+    if ((RadioCaps & OT_RADIO_CAPS_TRANSMIT_RETRIES) == 0)
+    {
+        RadioCaps = static_cast<otRadioCaps>(RadioCaps | OT_RADIO_CAPS_TRANSMIT_RETRIES);
+    }
 #endif // OPENTHREAD_CONFIG_ENABLE_SOFTWARE_RETRANSMIT
 
 #if OPENTHREAD_CONFIG_ENABLE_SOFTWARE_ENERGY_SCAN
-    assert((RadioCaps & OT_RADIO_CAPS_ENERGY_SCAN) == 0);
-    RadioCaps = static_cast<otRadioCaps>(RadioCaps | OT_RADIO_CAPS_ENERGY_SCAN);
+    if ((RadioCaps & OT_RADIO_CAPS_ENERGY_SCAN) == 0)
+    {
+        RadioCaps = static_cast<otRadioCaps>(RadioCaps | OT_RADIO_CAPS_ENERGY_SCAN);
+    }
 #endif // OPENTHREAD_CONFIG_ENABLE_SOFTWARE_ENERGY_SCAN
 
     return RadioCaps;